DESC:SYSTEM AND METHOD FOR REAL-TIME MONITORING OF A CONTAINER HAVING NON-GASEOUS FLUIDS USING WAVEGUIDES

FIELD OF THE INVENTION
[0001] The present disclosure generally relates to monitoring containers and, more particularly, relates to a system and a method for real-time monitoring of containers having non-gaseous fluids using through transmission method of waveguides.
BACKGROUND
[0002] Tanks and containers are commonplace in various sectors such as oil and gas industry, pharmaceutical industry, food and agriculture industry, remote well sites, and industrial farming sites. Many containers are commonly used in these sectors for storing oils, chemicals, and other non-gaseous fluids as raw materials or end products. The containers used in these sectors are often equipped with a liquid level detecting system to determine the height of a liquid level in a container. For instance, determining the liquid level is required in the case of an underground dispensing system for fuel or generally in the case of a container for dangerous substances. Many industries (such as the hydrocarbon, pharmaceutical, food, and chemical industries) also store liquids in holding or processing tanks. The liquid level inside the tank is typically required to determine the quantity delivered or the flow rate the tank is typically required to determine the quantity delivered or the rate of flow into or out of the tank. In most cases the tank will contain one liquid composition with an air/gas interface; however, it is also possible to have an interface between two stratified liquids with dissimilar densities.
[0003] Available solutions for measuring the liquid interface inside a holding tank are based on Guided Radar (TDR) or Capacitive Probes. However, both approaches have their disadvantages. The probes must be in contact with the media. The probe is subject to wear, fouling, and deposits which can result in measurement errors. Radar-based systems rely on a sharp interface with a minimum required difference in the dielectric constant for a reliable measurement. Capacitive probes must be calibrated for the media to be measured. In some cases, floating gauges may be used but they might easily fail.
[0004] The liquid level may also be detected by an ultrasonic level measuring system that includes a pair of acoustic transducers. An acoustic transducer is an electronic device used to emit and receive sound or acoustic waves or pulses. One type of acoustic transducer is an ultrasonic transducer which converts energy between electrical and acoustic forms of energy. Ultrasonic transducers are used in medical imaging, non-destructive evaluation, and other applications.
[0005] Typically, ultrasonic transducers-based liquid level sensors are inserted into either the top or bottom of a tank, exposing the seals and transducer material to potentially corrosive gases or liquids. This also makes it difficult to service the transducers without draining and purging the tank. Since the acoustic path between the top and bottom transducers is normal to a liquid-liquid interface or a gas-liquid interface there is low sensitivity to low reflecting layers. Current liquid-level sensors also have difficulty with applications involving the detection of the interface between two different liquids with different densities. Also, since emulsification scatters the reflected acoustic signal the existing level sensors have difficulty in detecting a level of an emulsified liquid interface.
[0006] Further, Fluctuations in fluid level can cause changes in pressure within a vessel or container, potentially leading to failure or inefficient operations. To address this, industries often employ level sensors and pressure transducers to monitor and control the fluid levels and pressures. These sensors provide real-time data, allowing for adjustments and preventive measures to maintain optimal conditions. Implementing robust control systems and automated processes based on sensor feedback can help regulate fluid levels and prevent failures.
[0007] Industries require sensors to be portable and capable of withstanding harsh or corrosive environments, such as chemical processing plants or offshore oil rigs. Advances in sensor technology have led to the development of rugged and corrosion-resistant sensors. Additionally, sensor enclosures or housings can be designed to protect the sensitive components from external factors. Regular maintenance, including cleaning and calibration, should be performed to ensure optimal performance in corrosive environments. Further, sensors often require complete replacement if they get damaged, which can be costly and time-consuming.
[0008] In a prior art, an ultrasonic waveguide sensor is used for measuring fluctuations in a liquid level using leaky longitudinal waves in a coolant loop system Figure 1 illustrates a schematic diagram of the measurement setup in accordance with one prior art. To measure the liquid level based on threshold and reference levels, two semi-circular notches of the same size of 0.2 mm depth and 1 mm width were made on the waveguide. The first (N1) and second (N2) notches were made at the height of 200 and 400 mm, respectively, from the bottom of the waveguide. The waveguide was kept inside the test loop in which the water level was varied at different levels concerning the height of the two notches. The A-scan signals were captured while varying the water level. The A-scan describes multiple reflected signals from notches and end of the waveguide. Figure 2 illustrates A-Scan signals of the prior art method obtained from a free waveguide with notches in non-dipping condition and waveguide at different water levels. When the water level was above the first notch (N1), the amplitude of the reflected signal from N1 shifted from the threshold signal. It confirms that the water level is above N1 or at a height of >200 mm, but <400mm from the bottom. In the figures 1-2, (a) relates to free waveguide with notches, (b) relates to the water level below the notches (100mm), (c) relates to the water level above the first notch (300mm) and (d) relates to the Water level above the two notches (600mm).
[0009] Further, temperature sensing in containers at very high temperatures is still a challenge, conventional float sensors and other ultrasonics sensors cannot give distributed level and temperature measurements. Also, conventional sensors have a limitation in the zone of measurement, for example, float sensors and guided wave radar-based sensors.
[0010] It is observed that the prior art techniques can only measure a range of levels, and the number of level ranges depends on the number of notches/holes in the waveguide. Further, the prior art techniques cannot measure distributed level and temperature sensing. Hence there is an ultrasonic guided wave technique to measure/monitor real-time distributed temperature and level of fluids with more accuracy. The present invention provides an IoT-enabled waveguide sensor system for real-time distributed temperature and level sensing in confined spaces for both highly viscous and non-viscous fluids.

SUMMARY
[0011] In one aspect of the present disclosure, a system for real-time monitoring of containers having non-gaseous fluids is disclosed. The system comprises a container filled with a non-gaseous fluid, at least one waveguide immersed in the fluid at a depth, a sensor unit comprising at least one ultrasonic transducer connected with at least one waveguide and configured to send electric pulses to at least one ultrasonic transducer for generating a torsional mode in the waveguide, and an IOT enabled electronic unit communicably connected to the sensor unit. An electronic signal is generated and transmitted from at least one waveguide immersed in the fluid during the torsional mode, and passes through the fluid, at least one waveguide receives the electronic signal passed through the fluid for monitoring the level and temperature of the non-gaseous fluid in the container.
[0012] In another aspect of the present disclosure, a system for real-time monitoring of the level and temperature of non-gaseous fluid in containers is disclosed. The system comprises a container filled with a non-gaseous fluid, a first waveguide attached on a first ultrasonic transducer and immersed in the fluid at a first depth, a second waveguide mounted on a second ultrasonic transducer and immersed in the fluid at the first depth and an IOT enabled electronic unit connected with the first ultrasonic transducer and the second ultrasonic transducer. The electronic unit is configured to send and receive signals and process the data from the ultrasonic transducers.
[0013] The first waveguide and the second waveguide are immersed in a fluid with a gap between each other. The IoT-enabled electronic unit sends electric pulses to the first ultrasonic transducer for generating torsional mode in the first waveguide, a signal is generated and transmitted from the first waveguide and passes through the fluid in the gap. The second waveguide receives the signal passed through the fluid, and the electronic unit records the time of transmission and time of reception of the signal, processes the data of records, and determines in the container.
[0014] In another aspect of the present disclosure, a method for real-time monitoring of containers having non-gaseous fluids is disclosed. The method comprises the step of immersing at least one waveguide connected with a sensor unit comprising at least one ultrasonic transducer in the fluid at a depth, supplying electric pulses to at least one ultrasonic transducer for generating torsional mode in at least one waveguide, generating an electronic signal from at least one waveguide for passing through the immersed fluid, receiving the electronic signal passed through the fluid by at least one waveguide, recording the data comprising amplitude and time of transmission of the signal and amplitude and time of reception of the signal and determine the level and temperature of the fluid in the container by processing the data.
[0015] In another aspect of the present disclosure, a method for real-time monitoring of the level and temperature of non-gaseous fluid in containers is disclosed. The method comprises immersing a first waveguide attached to a first ultrasonic transducer in the fluid at a first depth, immersing a second waveguide attached to a second ultrasonic transducer in the fluid at the first depth with a gap between the first waveguide and the second waveguide and supplying electric pulses to the first ultrasonic transducer for generating torsional mode in the first waveguide, generating a signal from the first waveguide passing through the fluid, receiving the signal passed through the fluid by the second waveguide, recording the data comprising amplitude and time of transmission of the signal and amplitude and time of reception of the signal and determining the level of the fluid in the container by processing the data.

BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 illustrates a schematic diagram of the measurement setup in accordance with one prior art.
[0017] Figure 2 illustrates A-Scan signals of the prior art method obtained from free waveguide with notches in non-dipping condition and waveguide at different water levels.
[0018] Figure 3 illustrates a schematic of a system for real-time monitoring of a container having non-gaseous fluids in accordance with the exemplary embodiment of the present disclosure.
[0019] Figure 4 illustrates a waveguide sensor for the system in accordance with one exemplary implementation the present disclosure.
[0020] Figure 5 illustrates A-Scans of signals from the waveguide sensor of the system in accordance with the present disclosure.
[0021] Figure 6 illustrates the change in Time of flight (TOF) of flat zone L1 in first waveguide at different fluid levels n accordance with the present disclosure.
[0022] Figure 7 illustrates different waveguide configurations of the system in accordance with the present disclosure.
[0023] Figure 8 illustrates an A-Scan with sufficient voltage or amplitude from the TT mode setup when two waveguides are immersed in water.
[0024] Figure 9 illustrates A-Scans of signal coming from two waveguides in TT mode setup when both the waveguides are immersed in a water medium at different depths.
[0025] Figure 10 illustrates a zoomed section in A-scan from Figure 5 indicated in a red box.
[0026] Figure 11 illustrates water level measurements with time reception and amplitude in a tabular format in accordance with the second example of the present invention.
[0027] Figure 12 illustrates an A-Scan from TT mode in two waveguides through lubricating oil (PRIME 32) using 250kHz shear transducers.
[0028] Figure 13 illustrates the variation in signal amplitude and time of flight as the level of fluid changes.
[0029] Figure 14 illustrates A-Scan from TT mode in two waveguides through the lubricating oil (2T Supreme) using 250kHz shear transducers.
[0030] Figure 15 illustrates the variation in signal amplitude and time of flight with different oil levels.
[0031] Figure 16 illustrates an experimental setup of the system for a single flat waveguide method in accordance with another implementation of the present disclosure.
[0032] Figure 17(a) – (b) illustrate the results of the measurements from the sensor unit for the single flat waveguide method in accordance with an example of the present disclosure.
[0033] Figure 18 illustrates an experimental setup of the system for a wave leakage method in accordance with another implementation of the present disclosure.
[0034] Figures 19(a) – 19(b) illustrate the results of the measurements from the sensor unit for the wave leakage method.
[0035] Figure 20 illustrates a schematic of a system for determining a level of fluid in containers in accordance with another embodiment of the present disclosure.
[0036] Figure 21 illustrates examples of I-IoT dashboards showing percentage and actual level measurements in accordance with the present disclosure.

DETAILED DESCRIPTION
[0037] In the present disclosure, a system and method for real-time monitoring of a container using waveguides are disclosed. The system is based on ultrasonic-guided wave technology that provides distributed level and temperature measurements of viscous and non-viscous fluids present in vessels or containers. The present invention provides a real-time measurement of the level temperature of liquids in containers via a dashboard and provides real-time alerts, data, and notifications to users, which will help industries make critical decisions and control damage. The present invention is designed to size ultrasonic leakage through fluid medium from waveguides. The guided wave leaking from one waveguide is captured by the other waveguide and the time of occurrence of the received signal is used for the level measurement. Since the transmission occurs in the fluid, the operating mode is also called Through Transmission mode (TT mode).
[0038] In an embodiment of the present disclosure, a system for real-time monitoring of the level and temperature of fluids in containers is disclosed. The system comprises a waveguide that is fixed on a shear transducer in such a way as to produce torsional waves in the waveguide. A similar setup is created and fixed on another shear transducer to produce a torsional mode. One of these setups is made as a transmitter and another as a receiver. When both waveguides are immersed in the fluid then ultrasonic wave/energy will leak through the fluid and be received by a receiver. An electronic unit sends the electric pulse to the shear transducer, and a torsional mode is generated in the waveguide. The shear transducer acts as a transmitter and transmits a signal passing through the fluid and the signal is received by another waveguide acting as receiver and kept at a certain distance or gap from the transmitter waveguide. The system has separate holders to hold the transducer and waveguide setup individually.
[0039] The time of reception of the signal is used to find the level of the fluid and the amplitude of the signal provides important information regarding fluid rheology. For different levels of immersion, the signal reception time and amplitude are different. The recorded time is correlated to the level of immersion and an equation is made. This equation will give the immersion level for each depth of immersion. Further, Time of fight (TOF) differences between predefined reflectors, such as notches/holes located on the waveguides are used to infer temperature profile in a chamber/container with temperature gradients.
[0040] Referring to figure 3, there is illustrated a schematic of a system for real-time monitoring of a container having non-gaseous fluids in accordance with the exemplary embodiment of the present disclosure. The system (100) comprises a container (110) filled with a non-gaseous fluid (115), a first waveguide (120a) connected with a first ultrasonic transducer (130) immersed in the fluid at a first depth, a second waveguide (120b) connected with a second ultrasonic transducer (140) and immersed in the fluid at the first depth and an IoT-enabled electronic unit communicably connected with the first ultrasonic transducer (130) and the second ultrasonic transducer (140). The IOT-enabled electronic unit is configured to send and receive signals and process the data from the ultrasonic transducers. The first waveguide (120a) and the second waveguide (120b) are immersed in a fluid with a gap (d) between each other. The IOT-enabled electronic unit sends electric pulses to the first ultrasonic transducer (130) for generating torsional mode in the first waveguide. An electronic signal is generated and transmitted from the first waveguide and passes through the fluid in the gap. The second waveguide (120b) receives the signal passed through the fluid. The IoT-enabled electronic unit records the time of transmission and time of reception of the signal, processes the data of records, and determines the level and temperature of the fluid in the container.
[0041] In an exemplary embodiment, as shown in Figure 3, the first ultrasonic transducer (130) and the second ultrasonic transducer (140) are shear transducers with a working frequency range of 100kHz-1MHz. Two metallic waveguides are cylindrical and have a dimension of 195mm in length and 2.4mm in diameter. Two waveguides are made of a metal selected from a group comprising steel, aluminium, steel alloy, and superalloys.
[0042] In another embodiment of the present disclosure, at least one waveguide comprises a body having a top cylindrical section and a bottom flat section for monitoring the level of the fluid. The top cylindrical section has a diameter, and the bottom flat section comprises a flat planar section forming a rectangular region.
[0043] In another embodiment of the present disclosure, at least one waveguide comprises a body having a cylindrical section and at least two notches/holes on the cylindrical section for monitoring the level of the fluid.
[0044] In an embodiment of the present disclosure, the system comprises a sensor unit having at least one ultrasonic transducer connected with the first waveguide and the second waveguide. The sensor unit is communicably connected with the IoT-enabled electronic unit through a wired / wireless communication network. The wired network may include not limited to cable, LAN and, powerline network of communications.
[0045] In another embodiment of the present disclosure, the system comprises a sensor unit having both the first ultrasonic transducer (130) and the second ultrasonic transducer (140). Both transducers are housed in a single sensor unit. The single sensor unit is communicably connected with the IoT-enabled electronic unit.
[0046] In another embodiment of the present disclosure, the first ultrasonic transducer (130) and the second ultrasonic transducer (140) are housed in a single sensor unit. The single sensor unit is communicably connected with the IoT-enabled electronic unit.
[0047] In an embodiment of the present disclosure, the system further comprises at least one holder for holding the ultrasonic transducer attached to the waveguide.
[0048] In an embodiment of the present disclosure, the gap between the first waveguide (120a) and the second waveguide (120b) ranges from 3 mm to 20 mm.
[0049] In one embodiment of the present disclosure, the second waveguide (120b) is immersed in fluid at the same depth as the first depth.
[0050] In one embodiment of the present disclosure, non-gaseous fluid may be not only limited to non-viscous and viscous fluids selected from water, lubricating oils, fuels, resins, high viscous chemicals, and polymers.
[0051] In another embodiment of the present disclosure, the second waveguide (120b) is immersed in fluid at a second depth different from the first depth.
[0052] In an embodiment of the present disclosure, the IoT-enabled electronic unit comprises a receiver communicably connected to the first ultrasonic transducer (130) and the second ultrasonic transducer (140), a data acquisition and computational unit communicably connected to the receiver, which is a pulse receiver, and a data transferring unit communicably connected to the data acquisition and computational unit. The pulse receiver receives measured analog signals for the physical properties of fluids, particularly from transmission and receipt of signals from ultrasonic waves from transducers. The data acquisition and computational unit receives analog signals from the first ultrasonic transducer and the second ultrasonic transducer from a multi-channel receiver.
[0053] The data acquisition and computational unit further comprises an analog-to-digital converter unit (ADC). The analog-to-digital converter unit converts analog signals received from transducers into digital signals. Further, the data acquisition and computational unit analyzes digital signals and monitors the properties of fluid for detecting an anomaly. The IoT-enabled electronic unit further comprises at least one data processing unit for processing the data and at least one memory unit for storing the relevant data. In an embodiment, the IoT-enabled electronic unit comprises a plurality of processors. The IoT-enabled electronic unit further may comprise a controller for managing all the functionalities of units based on a program installed on the same. The data transferring unit may comprise a wireless communication module communicably connected to the central server through the wireless communication network and transfers the digital signals from the data acquisition and computational unit to the central server.
[0054] In an embodiment of the present disclosure, the wireless communication network may be not only limited to a Radio Frequency (RF), Frequency-Division Multiplexing (FDM), Orthogonal FDM (OFDM), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time-Division Multiplexing (TDM), Time-Division Multiple Access (TDMA), Extended TDMA (E-TDMA), General Packet Radio Service (GPRS), extended GPRS, Code-Division Multiple Access (CDMA), Wideband CDMA (WCDMA), CDMA 2000, single-carrier CDMA, multi-carrier CDMA, Multi-Carrier Modulation (MDM), Discrete Multi-Tone (DMT), Bluetooth®, Global Positioning System (GPS), Wireless Fidelity (Wi-Fi), Wi-Max, ZigBee™, Ultra-Wideband (UWB), Global System for Mobile communication (GSM), second generation (2G), 2.5G, 3G, 3.5G, 4G, 4.5G, Fifth Generation (5G) mobile networks, Sixth Generation (6G) mobile networks, 3GPP, Long Term Evolution (LTE) cellular system, LTE advance cellular system, LTE Unlicensed systems, High-Speed Downlink Packet Access (HSDPA), High-Speed Uplink Packet Access (HSUPA), High-Speed Packet Access (HSPA), HSPA+, Single Carrier Radio Transmission Technology (1XRTT), Evolution-Data Optimized (EV-DO), Enhanced Data rates for GSM Evolution (EDGE), and the like.
[0055] The system further comprises a central server communicably connected to the IoT-enabled electronic unit through a wireless communication network, an intelligent decision unit positioned at a remote location and communicably connected to the central server through the wireless communication network, and a user communication device communicably connected to the intelligent decision unit through the wireless communication network. The central server may be a remote server running on a computing device. The intelligent decision unit is an embedded with Artificial intelligence and Machine learning-powered system leverages user input and historical data of fluids and transducers to detect an anomaly in the fluid and generate at least one of an alert, predictions, and corrective actions for the anomaly in the fluid. The user communication device may comprise a graphical user interface for receiving and displaying at least one alert, predictions, and corrective actions for the anomaly in the fluid from the intelligent decision unit.
[0056] In another embodiment of the present disclosure, the system may comprise a display unit communicably connected to the IoT-enabled electronic unit through a wired / wireless communication network. The display unit outputs a dashboard and shows real-time level and temperature data of containers to users.
[0057] In another embodiment of the present disclosure, a method for determining the level of fluid in containers is disclosed. The method comprises immersing a first waveguide (120a) attached to a first ultrasonic transducer (130) in the fluid at a first depth, immersing a second waveguide (120b) attached on a second ultrasonic transducer (140) in the fluid at the first depth with a gap between the first waveguide (120a) and the second waveguide (120b), supplying electric pulses to the first ultrasonic transducer (130) for generating torsional mode in the first waveguide, generating a signal from the first waveguide passing through the fluid, receiving the signal passed through the fluid by the second waveguide (120b), recoding the data comprising amplitude and time of transmission of the signal and amplitude and time of reception of the signal and determining level of the fluid in the container by processing the data.
[0058] To demonstrate the performance of the present invention, an experimental setup was made in TT Mode using two waveguides, and level and temperature measurements of various liquids were performed. The experimental setup as shown in Figure 3, was developed and both waveguides (120a, 120b) were connected to a single shear transducer housed in a single sensor unit. The measurements were collected from the sensor unit and communicated to the end user by an IoT-enabled based electronic unit.
[0059] Figure 4 illustrates a waveguide sensor for the system in accordance with one exemplary implementation of the present disclosure. The first waveguide (120a) comprises a body having a top cylindrical section (122) and a flat section (125) L1 used for tracking/monitoring the level of fluid by tracking the change in time of flight (TOF) of the signal. The time of flight is measured between the emission and reception time of ultrasonics signals. The Time-of-Flight of the reflected ultrasonic signal is directly proportional to the distance travelled. With the known container geometry, the level of the fluid is be calculated. The second waveguide (120b) comprises a cylindrical body (124) with a sensor zone/zones S1-S2 for tracking the temperature of the fluid by tracking the change in time of flight of the signal. The sensor zone has two notches (127a, 127b) made on the cylindrical body for monitoring the temperature of fluids inside the container. The time intervals between the receipt of successive echo pulses resulting from notches are measured resulting the distributed temperature of the zone/container.
[0060] Figure 5 shows A-Scans of signals from the waveguide sensor of the system in accordance with the present disclosure. A single shear transducer is used to generate torsional wave mode T (0,1) in the first waveguide (120a) and the second waveguide (120b). The material of the first waveguide (120a) and the second waveguide (120b) and notch/hole design were selected carefully to avoid overlap between the signals and the A-Scans results are shown in Figure -5. The change in Time of flight (TOF) of flat zone L1 was used to monitor the level of fluid, and the change in Time of flight (TOF) of sensor zone S1 was used to monitor the temperature of the fluid. Figure 6 illustrates the change in Time of flight (TOF) of flat zone L1 in the first waveguide at different fluid levels in accordance with the present disclosure.
[0061] In an embodiment of the present disclosure, the waveguide may comprise a plurality of notches to have a precise distributed temperature profile. The time intervals between the receipt of successive echo pulses resulting from notches are measured resulting the distributed temperature of the zone/container. In another embodiment of the present disclosure, the waveguide may comprise at least one flat section for monitoring the level of fluids. The temperature monitoring using the first waveguide does not affect the monitoring of the level of fluids. These waveguides can be designed in different waveguide configurations/designs. Figure 7 illustrates different waveguide configurations of the system in accordance with the present disclosure. The waveguide comprises a body having top cylindrical section and bottom section are designed to have a shape not limited to a spiral design, a helical design, and a square pulse design as shown in Figure 7.
[0062] To demonstrate the working of the invention, experiments with system setup were performed and the following section shows experimental results of the present invention for the exemplary example liquids of the present invention.
RESULT-1:
[0063] In the first example, the system was set up for determining the level of water in a container, where two waveguides were immersed in water at the same depth. Figure 8 shows an A-Scan with sufficient voltage or amplitude from the TT mode setup when two waveguides are immersed in water. Figure 8 shows the feasibility of the technology of the present invention and using the same, multiple parameters can be measured.
[0064] The time of reception of the signal depends on the fluid level because as the level increases, pressure at a particular point inside the fluid also increases and this may hinder the wave propagation hence time of reception may be larger. In this way, the time of reception can be related to fluid level. The amplitude of the signal depends on the depth of the waveguide immersed inside the fluid or the surface area of the waveguide that is in contact with a fluid. If the surface area of waveguide is high, then ultrasonic energy leakage is higher, and ultrasonic energy leakage is further received by the receiver waveguide. Fluid rheology can be measured using amplitude information.
RESULT-2:
[0065] In a second example, the system has been set up for determining the level of water in a container, where both the waveguides were immersed in a water medium at different depths. Figure 9 shows A-Scans of signal coming from two waveguides in TT mode setup when both the waveguides are immersed in a water medium at different depths.
[0066] Figure 10 shows a zoomed section in A-scan from Figure 8 indicated in the red box. re 11 shows water level measurements with time reception and amplitude in a tabular format in accordance with the second example of the present invention. From figures 9-11, it was observed that the time of reception increases as the level of fluid in the vessel increases, and the amplitude of the signal depends on the surface area of the waveguide which is in contact with a fluid. As the contact area increases, amplitude also increases.
RESULT-3:
[0067] In a third example, the system has been set up for determining the level of lubricating oil, where TT mode was established in two waveguides through lubricating oil (PRIME 32) using 250kHz shear transducers. Figure 12 shows an A-Scan from TT mode in two waveguides through lubricating oil (PRIME 32) using 250kHz shear transducers. Figure 13 shows a zoomed section in A-scan from Figure 12 showing the variation in signal amplitude and time of flight as the level of fluid changes.
[0068] In this example, lube oil has been used to check the level. From A-scans, it was observed that change in the time of reception with respect to different levels. An increase in amplitude occurred because the contact surface area of the waveguide with fluid was also increased and therefore there was an increase in energy leakage.
RESULT-4:
[0069] In a fourth example, the system has been set up for determining the level of another type of lubricating oil, where TT mode was established in two waveguides through lubricating oil (2T Supreme) using 250kHz shear transducers. Figure 14 shows an A-Scan from TT mode in two waveguides through the lubricating oil (2T Supreme) using 250kHz shear transducers. Figure 15 shows a zoomed section in A-scan from Figure 14 showing the variation in signal amplitude and time of flight with different oil levels.
[0070] In this example, another lube oil has been used to check the level. From Figure 15, the change in time of reception with different levels can be seen from A-Scans. An increase in amplitude was observed because the contact surface area of the waveguide with fluid was also increasing and therefore an increase in energy leakage.
[0071] Further to the above examples of the present disclosure, another experimental setup was made in PE (Pulse Echo) -Mode for a single flat waveguide method and for a wave leakage method. Figure 16 illustrates an experimental setup of the system for a single flat waveguide method in accordance with another implementation of the present disclosure. A stainless-steel waveguide (1610) with a total length of 300 mm and a flat section of 140 mm was used for the single flat waveguide method. The waveguide has a cylindrical section with a diameter 2.4 mm. Another stainless-steel waveguide with a total length of 415 mm with a distance/gap between waveguides of 3 mm was used for the wave leakage method. The waveguide relates to a sensor unit (1620) comprising an ultrasonic transducer, through a sleeve (1640). The sensor unit is connected to the IoT-enabled electronic unit. The TT mode was established using 250kHz shear transducers. After setting up the system, scale markings in mm were done in a beaker (1630) of 1000 ml, the beaker was filled with water with an interval of 10 mm. Once the water was filled, the data from the sensor unit were collected. Figure 17(a) – (b) illustrates the results of the measurements from the sensor unit for the single flat waveguide method in accordance with an example of the present disclosure.
[0072] Figure 18 illustrates an experimental setup of the system for a wave leakage method by another implementation of the present disclosure. As mentioned above, two waveguides (1610, 1615) comprising a first stainless-steel waveguide (1610) having a total length of 300 mm and with a flat section of 140 mm and a second stainless-steel waveguide (1615) having a total length of 415 mm, with a distance between two waveguides of 3 mm was used for the wave leakage method. Two waveguides are connected to a sensor unit mounted at a particular height in a stand so that waveguides are immersed in the fluid of the beaker. Among the two waveguide units of this setup, one acts as a transmitter and another one acts as a receiver. After setting up the system for the wave leakage method, scale markings in mm were done in a beaker of 1000 ml, the beaker was filled with water with an interval of 7 mm. Once the water was filled, the data from the sensor unit were collected. Figures 19(a) – 19(b) illustrate the results of the measurements from the sensor unit for the wave leakage method.
[0073] Referring to figure 20, there is illustrated a schematic of a system for determining the level of fluid in containers by accordance with another embodiment of the present disclosure. The system (200) comprises a similar setup (100) as in the previous embodiments. The system (200) further comprises an electronic unit (150) connected with the first ultrasonic transducer (130) and the second ultrasonic transducer (140). The electronic unit (150) is configured to send and receive signals and process the data. In an implementation of the present disclosure, the electronic unit is an IOT-enabled electronic unit that records the time of transmission and time of reception of the signals from the transducer setups. The electronic unit further processes the data of records and determines the level of the fluid in the container.
The system (200) further comprises an IOT server communicably connected with the electronic unit and a display unit communicably connected with the IOT server. The IOT server may comprise a plurality of analytic modules and engines configured to generate real-time measurements of the level of fluid and transmit the same to the display unit. The display unit may comprise a touchscreen display that displays an I-IoT Dashboard with a level of fluid in Real time. I-IoT dashboard helps to monitor the fluid level in real time. The level can be seen in both percentage and actual level measurements based on application.
[0074] Referring to figures 21(a)-21(b), there are illustrated examples of I-IoT dashboard showing percentage and actual level measurements in accordance with the present disclosure.
[0075] The present invention provides a solution that helps industries measure the fluid level and distributed temperature of both viscous and non-viscous fluids and their distributed temperature profile in real-time. Since the waveguide is very less than or equal to 2 mm in diameter the present invention, the waveguides of different geometry configurations can be used and only the L1 in waveguides must be flat to do the level measurements.
,CLAIMS:We claim:

1. A system for real-time monitoring of containers having non-gaseous fluids, comprising:
a container (110) filled with a non-gaseous fluid (115);
at least one waveguide immersed in the fluid at a depth;
a sensor unit comprising at least one ultrasonic transducer connected with the at least one waveguide, wherein the sensor unit is configured to send electric pulses to at least one ultrasonic transducer for generating a torsional mode in the waveguide; and
an IoT-enabled electronic unit communicably connected to the sensor unit;
wherein an electronic signal is generated and transmitted from at least one waveguide (120a) immersed in the fluid during the torsional mode and passes through the fluid, the at least one waveguide (120b) receives the electronic signal passed through the fluid for monitoring the level and temperature of the non-gaseous fluid in the container.

2. The system as claimed in claim 1, wherein the IoT-enabled electronic unit records the time of transmission and time of reception (ToR) of the signal from the sensor unit, processes the data of records and determines the level and temperature of the fluid in the container.
3. The system as claimed in claim 1, wherein the waveguide is made of a metal selected from steel, aluminium, steel alloy, and superalloys.
4. The system as claimed in claim 1, wherein at least one waveguide comprises a body having a cylindrical section and at least two notches on the cylindrical section for monitoring the temperature of the fluid.
5. The system as claimed in claim 1, wherein at least one waveguide comprises a body having a top cylindrical section and a bottom flat section for monitoring the level of the fluid.
6. The system as claimed in claim 5, wherein the bottom flat section is a rectangular planar section.
7. The system as claimed in claim 1, wherein non-gaseous fluid is one of non-viscous and viscous fluid selected from water and lubricating oils, fuels, resins, and high viscous chemicals and polymers.
8. The system as claimed in claim 1, wherein at least two waveguides are immersed in the fluid at a depth with a gap between each other.
9. The system as claimed in claim 7, wherein at least two waveguides are immersed in fluid at the same depth.
10. The system as claimed in claim 7, wherein at least two waveguides are immersed in fluid at different depths.
11. The system as claimed in claim 1, wherein the system further comprises at least one holder for holding the ultrasonic transducer attached to the waveguide.
12. The system as claimed in claim 1, wherein at least one ultrasonic transducer is a shear transducer having a working frequency range of 100kHz-1MHz.
13. A method for real-time monitoring of containers having non-gaseous fluids, the method comprising:
immersing at least one waveguide connected with a sensor unit comprising at least one ultrasonic transducer in the fluid at a depth;
supplying electric pulses to the at least one ultrasonic transducer for generating torsional mode in the at least one waveguide;
generating an electronic signal from at least one waveguide for passing through the immersed fluid;
receiving the electronic signal passed through the fluid by at least one waveguide;
recording the data comprising amplitude and time of transmission of the signal and amplitude and time of reception of the signal; and
determines the level and temperature of the fluid in the container by processing the data.