TECHNICAL FIELD
[0001] The present disclosure relates to the field of measuring devices. More particularly, the present disclosure relates to a system to determine a linear dimension of an object.

BACKGROUND
[0002] The background description includes information that may be useful in understanding the present system. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed system, or that any publication specifically or implicitly referenced is prior art.
[0003] Many linear dimension measuring devices and systems exist. A typical height measuring system, for instance, consists of a vertical member marked with a height scale and attached either to the wall or to a floor base. These systems measure a person's height relative to the floor, often using a movable horizontal member which slides up and down the vertical member and indicates the person's height as a position on the vertical height scale when the horizontal member is rested on the person's head. These systems requisite a supplementary person to first adjust the starting and ending point of the instrument to measure the height of the person. These manual involvements make these devices less accurate and time consuming.
[0004] With advancement in technology, automatic instruments and systems have also been designed. Electronic measurement approaches of height in these systems usually center on tracking the vertical position of the movable horizontal member electronically and displaying the associated height measured on a display. Such electronic measurement approaches are expensive and offer little advantage over reading the height measurement manually from a printed scale. Also, these electronic systems are complex and bulkier which makes it difficult to transport and requires a skilled person to operate.
[0005] United States Patent number US4196521 discloses a method to measure the height by conventional method involving mechanical setups which are generally found at clinics and hospital. The device of the cited reference is quite heavy and difficult to transport from one location to another and also the device is less accurate as difficult to locate on the wall and human error while observation. The method disclosed can only measure height.
[0006] United States Patent number US5379028 discloses a device to measure the tallness with voice readout for which they require digital complex circuit provided with conventional mechanical setup for calibrating the height and to properly work the device. The device of the cited reference uses an electronic circuit along with conventional mechanical setup for height measurement which are bulky, complex and requires a skilled person to operate. The device proposed can also measure only height.
[0007] There is, therefore, a need in the art for a system and method to measure any linear dimension of an object that is simple to operate and easy to manufacture and install. System proposed should also be able to offer determined linear dimension data to external systems for appropriate use therein.
[0008] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0009] All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the system and does not pose a limitation on the scope of the system otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the system.
[00010] Groupings of alternative elements or embodiments of the system disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claim

OBJECTS OF THE INVENTION
[00011] Some of the objects of the present disclosure, which at least one embodiment herein satisfies are as listed herein below.
[00012] It is an object of the present disclosure to provide for a system to determine a linear dimension of an object.
[00013] It is another object of the present disclosure to provide for a system to determine a linear dimension of an object that is easy to operate.
[00014] It is an object of the present disclosure to provide for a system to determine a linear dimension of an object that is easy and economical to manufacture and install.
[00015] It is an object of the present disclosure to provide for a system to determine a linear dimension of an object that can provide its output to other systems.

SUMMARY
[00016] The present disclosure relates to the field of measuring devices. More particularly, the present disclosure relates to a systems to measure linear dimensions such as height, length and width.
[00017] This summary is provided to introduce simplified concepts of a system to determine a linear dimension of an object. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended for use in determining/limiting the scope of the claimed subject matter.
[00018] In an aspect, present disclosure elaborates upon a system to determine a linear dimension of an object. The system can include: a sensor configured to emit a first wave towards a reflecting surface and to receive the first wave reflected from the reflecting surface, and configured to emit a second wave when the object is in contact with the reflecting surface with the linear dimension facing the second wave to be emitted, and to receive the second wave reflected from the object; and a microcontroller configured to determine: a first time elapsed between emission of the first wave and reception of the first wave; a second time elapsed between emission of the second wave and reception of the second wave; and the linear dimension based upon difference between the first time elapsed and the second time elapsed.
[00019] In another aspect, any or a combination of the sensor and the microcontroller can be configured to determine time instance of transmission of any or both of the first wave and the second wave, and time instance of receipt of any or both of the first wave and said second wave.
[00020] In another aspect, wherein the object can be a person, the linear dimension can be height of the person, the reflecting surface can be ground, the first wave and the second wave are ultrasonic waves, and wherein the sensor can be configured above the person.
[00021] In yet another aspect, the system can detect when the object is absent for a pre-determined time and upon the detection can shift into a power saving mode.
[00022] In an aspect, the system can include a transmission unit that transmits the linear dimension to a computing device operatively connected with the system.
[00023] In another aspect, the sensor and the microcontroller can be configured in a device operatively connected to a display that displays the linear dimension.
[00024] In another aspect, the display can be is part of the device.
[00025] In yet another aspect, the transmission unit can use any or a combination of a wired transmission method or a wireless transmission method.
[00026] In an aspect, the wireless transmission method can use any or a combination of near-field communication (NFC), Bluetooth, W-Fi, Zigbee, GSM, CDMA, EDGE and 4G LTE communication protocols.
[00027] In an aspect, present disclosure elaborates upon a method to determine a linear dimension of an object. The method can include the steps of: emitting, using a sensor, a first wave towards a reflecting surface and receiving, using the sensor the first wave reflected from the reflecting surface; emitting, using the sensor, a second wave when the object is in contact with the reflecting surface with the linear dimension facing the second wave to be emitted, and receiving using the sensor the second wave reflected from the object; determining, using a microcontroller, a first time elapsed between emission of the first wave and reception of the first wave; determining, using the microcontroller, a second time elapsed between emission of the second wave and reception of the second wave; and determining, using the microcontroller, the linear dimension based upon difference between the first time elapsed and the second time elapsed.
[00028] Within the scope of this application it is expressly envisaged that the various aspects, embodiments, examples and alternatives set out in the preceding paragraphs, in the claims and/or in the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination. Features described in connection with one embodiment are applicable to all embodiments, unless such features are incompatible.
[00029] Various objects, features, aspects and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like features.

BRIEF DESCRIPTION OF DRAWINGS
[00030] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[00031] The diagrams are for illustration only, which thus is not a limitation of the present disclosure, and wherein:
[00032] FIGs. 1A and 1B illustrate an example of overall working of the proposed system in accordance with an exemplary embodiment of the present disclosure.
[00033] FIG. 2 illustrates various components of the proposed system and their functions in accordance with an exemplary embodiment of the present disclosure.
[00034] FIG. 3 illustrates an exemplary implementation of the proposed system in accordance with an exemplary embodiment of the present disclosure.
[00035] FIG. 4 illustrates a method of implementing proposed system in accordance with an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION
[00036] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[00037] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details.
[00038] In the specification, reference may be made to the spatial relationships between various components and to the spatial orientation of various aspects of components as the devices are depicted in the attached drawings. However, as will be recognized by those skilled in the art after a complete reading of the present application, the devices, members, apparatuses, etc. described herein may be positioned in any desired orientation. Thus, the use of terms such as “above,” “below,” “upper,” “lower,” or other like terms to describe a spatial relationship between various components or to describe the spatial orientation of aspects of such components should be understood to describe a relative relationship between the components or a spatial orientation of aspects of such components, respectively, as the device described herein may be oriented in any desired direction.
[00039] The ensuing description provides exemplary embodiments only, and is not intended to limit the scope, applicability, or configuration of the disclosure. Rather, the ensuing description of the exemplary embodiments will provide those skilled in the art with an enabling description for implementing an exemplary embodiment. It should be understood that various changes may be made in the function and arrangement of elements without departing from the spirit and scope of the disclosure as set forth in the appended claims.
[00040] Specific details are given in the following description to provide a thorough understanding of the embodiments. However, it will be understood by one of ordinary skill in the art that the embodiments may be practiced without these specific details. For example, circuits, systems, networks, processes, and other components may be shown as components in block diagram form in order not to obscure the embodiments in unnecessary detail. In other instances, well-known circuits, processes, algorithms, structures, and techniques may be shown without unnecessary detail in order to avoid obscuring the embodiments.
[00041] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[00042] The present disclosure relates to the field of measuring devices and systems. More particularly, the present disclosure relates to a systems to measure linear dimensions such as height, length and width.
[00043] In an aspect, present disclosure elaborates upon a system to determine a linear dimension of an object. The system can include: a sensor configured to emit a first wave towards a reflecting surface and to receive the first wave reflected from the reflecting surface, and configured to emit a second wave when the object is in contact with the reflecting surface with the linear dimension facing the second wave to be emitted, and to receive the second wave reflected from the object; and a microcontroller configured to determine: a first time elapsed between emission of the first wave and reception of the first wave; a second time elapsed between emission of the second wave and reception of the second wave; and the linear dimension based upon difference between the first time elapsed and the second time elapsed.
[00044] In another aspect, any or a combination of the sensor and the microcontroller can be configured to determine time instance of transmission of any or both of the first wave and the second wave, and time instance of receipt of any or both of the first wave and said second wave.
[00045] In another aspect, wherein the object can be a person, the linear dimension can be height of the person, the reflecting surface can be ground, the first wave and the second wave are ultrasonic waves, and wherein the sensor can be configured above the person.
[00046] In yet another aspect, the system can detect when the object is absent for a pre-determined time and upon the detection can shift into a power saving mode.
[00047] In an aspect, the system can include a transmission unit that transmits the linear dimension to a computing device operatively connected with the system.
[00048] In another aspect, the sensor and the microcontroller can be configured in a device operatively connected to a display that displays the linear dimension.
[00049] In another aspect, the display can be is part of the device.
[00050] In yet another aspect, the transmission unit can use any or a combination of a wired transmission method or a wireless transmission method.
[00051] In an aspect, the wireless transmission method can use any or a combination of near-field communication (NFC), Bluetooth, W-Fi, Zigbee, GSM, CDMA, EDGE and 4G LTE communication protocols.
[00052] In an aspect, present disclosure elaborates upon a method to determine a linear
dimension of an object. The method can include the steps of: emitting, using a sensor, a first wave towards a reflecting surface and receiving, using the sensor the first wave reflected from the reflecting surface; emitting, using the sensor, a second wave when the object is in contact with the reflecting surface with the linear dimension facing the second wave to be emitted, and receiving using the sensor the second wave reflected from the object; determining, using a microcontroller, a first time elapsed between emission of the first wave and reception of the first wave; determining, using the microcontroller, a second time elapsed between emission of the second wave and reception of the second wave; and determining, using the microcontroller, the linear dimension based upon difference between the first time elapsed and the second time elapsed.
[00053] FIGs. 1A and 1B illustrate overall working of the proposed system in accordance with an exemplary embodiment of the present disclosure.
[00054] As illustrated, the proposed system 102 can be in form of a device that can be mounted on a wall or any vertical surface (not shown) above a floor 104. Or system /device 102 ( the two terms used interchangeably herein ) can be configured in any manner (for instance by affixing into a ceiling) above floor 104. Distance/height between device 102 and floor 104 can be so kept that an object O1 whose height is to be measured can be placed below it, as illustrated in FIG. 1B. Device 102 can have a sensor that can emit and receive a wave. In an exemplary embodiment elaborated herein, the sensor can emit and receive an ultrasonic wave. Besides, device 102 can have within it (or be operatively connected to) a microcontroller that can control the operation of the proposed system/ device.
[00055] As shown in FIG. 1A, the device 102 can emit a first ultrasonic wave shown as W1 directed towards a reflecting surface that can be floor 104. Time instance of emission of the wave W1 can be marked and stored in proposed system/ device 101 as Te1, as shown.
[00056] As can be understood, the wave W1 can be reflected back as WR1 shown and can be received back by the device 101 at time instance Tr1. The device /system 102 can mark and store time instance Tr1.
[00057] Further, proposed system can determine time difference Tr1 – Te1. As can be readily understood, this time difference depends upon distance/height H1 between floor 104 and device 102 (from the point where waves are being emitted). Knowing the speed of transmission of wave W1 and this time difference, height H1 between the device 102 and floor 104 can be easily determined. Proposed system can store value H2 as well.
[00058] Next, as illustrated in FIG. 1B, an object O1 can be kept in contact with floor 104 in such a manner that linear dimension to be determined faces the wave to be emitted by proposed device 102. For instance, if length is to be determined, dimension L of object O1 should face the wave to be emitted, as shown. , Next, the process as elaborated above can be repeated.
[00059] As shown in FIG. 1B, the device 102 can emit an ultrasonic wave shown as W2. Time instance of emission of the wave W2 can be marked and stored in proposed system/ device 101 as Te2.
[00060] As can be understood, the wave W2 can be reflected back as WR2 shown (from upper surface of object O1) and can be received back by the device 102/ sensor within at time instance Tr2. The device /system 102 can mark and store time instance Tr2.
[00061] Further, proposed system can determine time difference Tr2 – Te2. As can be readily understood, this time difference depends upon distance between top surface of object O1 104 and device 102. Knowing the speed of transmission of wave W1 and this time difference, distance H2 between the device 102 and object O1 can be easily determined. Proposed system can store value H2 as well.
[00062] Further, knowing H1 and H2, proposed system can then easily determine length L as H1-H2, as can be readily understood. Proposed system can display value L so determined on a display within it, or another display/system it is operatively connected to.
[00063] In an exemplary embodiment, value so determined can be used for various purposes. For instance, proposed system/device can be configured before a subway and can determine linear dimension L of any object that passes beneath it. If the dimension L exceeds a pre-determined number (that can be, for example, maximum height of objects allowed in the subway), proposed system can trigger an alarm.
[00064] In an exemplary embodiment, the sensor in device 102 can itself mark time of emission of a wave and reception of its reflection and can determine time elapsed between the emission and the reception. When no object is disposed between the device /system 102 and floor 104, the time elapsed can be termed as first sensor data and when an object is so disposed as elaborated above the time elapsed can be termed as second sensor data. The sensor can send both the first sensor data and the second sensor data to the microcontroller. The microcontroller can determine the difference between the first sensor data and the second sensor data and accordingly the height of the object as elaborated above.
[00065] As can be readily appreciated, determination of various instances of time as well as difference between them (to determine time elapsed) can be done by the microcontroller unit instead of the sensor.
[00066] In an embodiment, the proposed system can also incorporate a power management unit that can be used to supply electrical power to the microcontroller unit with a battery or other preferred power sources.
[00067] In an embodiment, the proposed system can include a display unit inbuilt in it (in device 102) to display the measured height of the person as calculated by the microcontroller unit. The display unit can as well be configured to display a graphical user interface (GUI) using which a user can control the proposed system.
[00068] In an embodiment, the display unit can be external to device 102 and can be mounted at any designated place as per the user’s convenience
[00069] In an embodiment, the proposed system can include a Bluetooth unit operatively connected to the microcontroller, which can enable the microcontroller unit to transfer and display the measured data of height to other mobile devices(for instance a Bluetooth enabled mobile device upon which a mobile application configured to operate the proposed system has been installed).
[00070] In an embodiment, the proposed system can be incorporated with an Internet facility to pair with a remote device (for instance a mobile phone) through Internet. In this manner, the proposed system/ device 102 can be considered as an Internet of Things (IoT) device wherein using Internet the proposed system can transmit relevant data (such as height of the object ) to another Internet enabled device (for instance a computing device or an Internet enabled mobile device).
[00071] FIG. 2 illustrates various components of the proposed system and their functions in accordance with an exemplary embodiment of the present disclosure.
[00072] According to an embodiment of the proposed system, proposed system 102 can include an ultrasonic sensor 201 (also referred to as sensor 201 hereinafter), and a microcontroller unit 202. The sensor 201can emit an ultrasonic wave and receive the ultrasonic wave reflected back from an object. Further, the sensor 201 can measure time elapsed between emission and reception of the ultrasonic wave. The time elapsed can constitute first or second sensor data as elaborated above. The microcontroller unit 202 can receive the first sensor data or the second sensor data from the sensor 201, can calculate the difference between the two data, and can use the difference to determine height of the object, as already elaborated.
[00073] In an embodiment, the sensor 201 can be any suitable ultrasonic sensor. Microcontroller unit 202 can be any processing unit coupled with a memory, including but not limited to Arduino Uno which is an open-source microcontroller board based on the Microchip ATmega328P microcontroller.
[00074] In an embodiment, the proposed system can incorporate a display unit 203 to display the measured height of the object calculated by the microcontroller unit 202. The display unit 203 can have a graphical user interface (GUI) for a user of the proposed system to interact with it such as switching it on or off etc.
[00075] The display unit 203 can be any display device, but not limited to a LCD display and the like.
[00076] In an aspect, proposed system 202 can have a transmission unit 204 that can transmit various data generated (such as linear dimension as determined above) to a computing device operatively connected with said system. For example, transmission unit 204 may be used to transmit the measured height to display unit 203 when display unit 203 forms part of the computing device. Transmission unit 204 can use any or a combination of a wired transmission method and a wireless transmission method. The wireless transmission method can use any or a combination of near-field communication (NFC), Bluetooth, W-Fi, Zigbee, GSM, CDMA, EDGE and 4G LTE communication protocols.
[00077] In an embodiment, the proposed system can include a power management unit 205 to supply electrical power to the system 200. The power management unit 205 can supply power by a battery or any other suitable electrical power source.
[00078] In an embodiment, the proposed system can also be operated using a mobile computing device 206 and a mobile app such that the measured height data can be transferred and displayed on mobile computing devices 206 using transmission unit 204 for further processing and use as required.
[00079] In an exemplary embodiment, proposed system can determine if there is no object presented to it within a pre-determined time for determining its linear dimension. In this case proposed system /device can shut itself off to save power.
[00080] FIG. 3 illustrates an exemplary implementation of the proposed system in accordance with an exemplary embodiment of the present disclosure.
[00081] In an aspect, a process for measuring height of an object by the proposed system can start as shown at block 301 with switching on the device/system after its mounting on a wall at height expected to be above the object.
[00082] As shown at block 302, in an exemplary embodiment proposed system can detect if an object/person is placed below the sensor of the system or not. If the condition is not true (i.e. there is no object below the sensor) then the proposed system can go into power save mode as indicated at block 303. Further, the proposed system can generate and store the first sensor data as already elaborated.
[00083] In an exemplary embodiment, proposed system can go into power save mode if there is no operation for a pre-determined time. The power save mode can be triggered by operation of waves themselves. For instance, proposed system can automatically send pre-determined number of waves each after a pre-determined interval ( total such intervals leading to the pre-determined time ) and monitor for each wave time elapsed between its transmission from system /device 102 and receipt back of its reflection at proposed system/device 102. If the time remains same for the pre-determined number, proposed system can trigger itself off. As can be readily understood, in a similar manner proposed system can detect when there no object present (for determination of its linear dimension) for a pre-determined time and, upon such detection, shift into a power-save mode.
[00084] Further, proposed system can determine time difference Tr1 – Te1. As can be readily understood, this time difference depends upon distance/height H1 between floor 104 and system 102.
[00085] In an embodiment, a step 304 of the process can be initiated only if the condition of the step 302 is true (i.e. there is an object below the device) and then an LCD display configured in the device proposed can turn ON and the LCD can display a message “READY”. Thereafter, as already elaborated, the sensor of the proposed system can measure the time elapsed between emission and reception of an ultrasonic wave and transfer this time data as second sensor data to the microcontroller unit.
[00086] As shown at bock 305, the first sensor data and the second sensor data can be provided to microcontroller 202 of the proposed system that can process the received data to determine height of the object.
[00087] The determined height can be displayed on a display unit with a message “Height=………”...as shown at block 306.
[00088] In an embodiment, the process can further include block 307 of turning ON a transmission unit (such as transmission unit 204) that can be a Bluetooth unit as shown. Upon such unit being provided, height as determined at block 305 can be transmitted to a mobile app of the proposed system, as shown at block 308.
[00089] FIG. 4 illustrates a method of implementing proposed system in accordance with an exemplary embodiment of the present disclosure.
[00090] In an aspect, a method for determining a linear dimension of an object can include, at step 402, emitting, using a sensor, a first wave towards a reflecting surface and receiving, using the sensor the first wave reflected from the reflecting surface; and at step404, emitting, using the sensor, a second wave when the object is in contact with the reflecting surface with the linear dimension facing the second wave to be emitted, and receiving using the sensor the second wave reflected from the object.
[00091] The method can further include, at step 406, determining, using a microcontroller, a first time elapsed between emission of the first wave and reception of the first wave; and at step 408 determining, using the microcontroller, a second time elapsed between emission of the second wave and reception of the second wave.
[00092] The method can further include, at step 410, determining, using the microcontroller, the linear dimension based upon difference between the first time elapsed and the second time elapsed.
[00093] While the system proposed has been elaborated in form of a device for measuring height of an object using ultrasonic waves, it can be readily appreciated that any other dimension ( for example length) can be similarly measured by positioning the device and a wave reflecting surface appropriately. Further, instead of ultrasonic wave, any other wave can be similarly used, as long as the sensor can be configured to have the capability of transmission of such wave and detection of is reflection. All such modifications are fully a part of the present disclosure.
[00094] While the foregoing describes various embodiments of the system, other and further embodiments of the system may be devised without departing from the basic scope thereof. The scope of the system is determined by the claims that follow. The system is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the system when combined with information and knowledge available to the person having ordinary skill in the art.
[00095] Hence, while some embodiments of the present disclosure have been illustrated and described, those are completely exemplary in nature. The disclosure is not limited to the embodiments as elaborated herein only and it would be apparent to those skilled in the art that numerous modifications besides those already described are possible without departing from the inventive concepts herein. All such modifications, changes, variations, substitutions, and equivalents are completely within the scope of the present disclosure. The inventive subject matter, therefore, is not to be restricted except in the spirit of the appended claims.

ADVANTAGES OF THE PRESENT DISCLOSURE
[00096] The present disclosure provides for a system to determine a linear dimension of an object.
[00097] The present disclosure provides for a system to determine a linear dimension of an object that is easy to operate.
[00098] The present disclosure provides for a system to determine a linear dimension of an object that is easy and economical to manufacture and install.
[00099] The present disclosure provides for a system to determine a linear dimension of an object that can provide its output to other systems.

We Claim:
1. A system for determining a linear dimension of an object comprising:
a sensor configured to emit a first wave towards a reflecting surface and to receive said first wave reflected from said reflecting surface, and configured to emit a second wave when said object is in contact with said reflecting surface with said linear dimension facing said second wave to be emitted, and to receive said second wave reflected from said object; and
a microcontroller configured to determine:
a first time elapsed between emission of said first wave and reception of said first wave;
a second time elapsed between emission of said second wave and reception of said second wave; and
said linear dimension based upon difference between said first time elapsed and said second time elapsed.
2. The system of claim 1, wherein any or a combination of said sensor and said microcontroller is configured to determine time instance of transmission of any or both of said first wave and said second wave, and time instance of receipt of any or both of said first wave and said second wave.
3. The system of claim 1, wherein said object is a person, said linear dimension is height of said person, said reflecting surface is ground, said first wave and said second wave are ultrasonic waves, and wherein said sensor is configured above said person.
4. The system of claim 1, wherein said system detects when said object is absent for a pre-determined time and upon said detection shifts into a power saving mode.
5. The system of claim 1, wherein said system comprises a transmission unit that transmits said linear dimension to a computing device operatively connected with said system.
6. The system of claim 1, wherein said sensor and said microcontroller are configured in a device operatively connected to a display that displays said linear dimension.
7. The system of claim 6, wherein said display is part of said device.
8. The system of claim 5, wherein said transmission unit uses any or a combination of a wired transmission method and a wireless transmission method.
9. The system of claim 8, wherein said wireless transmission method uses any or a combination of near-field communication (NFC), Bluetooth, W-Fi, Zigbee, GSM, CDMA, EDGE and 4G LTE communication protocols.
10. A method for determining a linear dimension of an object comprising the steps of:
emitting, using a sensor, a first wave towards a reflecting surface and receiving, using said sensor said first wave reflected from said reflecting surface;
emitting, using said sensor, a second wave when said object is in contact with said reflecting surface with said linear dimension facing said second wave to be emitted, and receiving using said sensor said second wave reflected from said object;
determining, using a microcontroller, a first time elapsed between emission of said first wave and reception of said first wave;
determining, using said microcontroller, a second time elapsed between emission of said second wave and reception of said second wave; and
determining, using said microcontroller, said linear dimension based upon difference between said first time elapsed and said second time elapsed.