Description:BACKGROUND
Field of Invention
[001] Embodiments of the present invention generally relate to system for detection of a gunshot and particularly to a system for gunshot detection and direction localization.
Description of Related Art
[002] Accurate detection and localization of gunfire is a critical need for military, law enforcement, and security operations. This capability is essential for situational awareness, enabling timely responses and reducing the risk to personnel in dangerous environments. Over the years, numerous technologies have been developed to address this challenge, but many have inherent limitations that impact their effectiveness and reliability.
[003] Moreover, traditional gunfire detection systems often rely on single microphone setups, which are constrained in their ability to determine the source of sound due to the lack of spatial data. Radar-based systems, while effective in certain scenarios, face challenges related to environmental interference such as terrain and weather conditions, which can degrade accuracy. Similarly, passive detection systems, which rely on acoustic signals, are often unable to accurately determine the angle of arrival, making precise localization difficult.
[004] However, existing systems and methods encounter practical issues, including high rates of false alarms, delayed detection, and limited coverage areas. Additionally, many systems require extensive calibration, are costly to implement, and lack portability or ease of use. These shortcomings have hindered their widespread adoption and reduced their utility in real-time, high-stakes scenarios.
[005] There is thus a need for an improved and advanced system for gunshot detection and direction localization that can administer the aforementioned limitations in a more efficient manner.
SUMMARY
[006] Embodiments in accordance with the present invention provide a system for gunshot detection and direction localization. The system comprising: an array of hexagonal microphones, installed on a baton, adapted to capture analogue sound waves from surroundings. The hexagonal microphones comprise a signal output pin. The system further comprising: a conversion unit, connected to the array of hexagonal microphones through the single output pin of the hexagonal microphones, adapted to convert the captured analogue sound waves into digital sound waves. The system further comprising: a control unit communicatively connected to the conversion unit. The control unit is configured to: receive the digital sound waves from the conversion unit; conduct a bandpass filtering on the received digital sound waves to isolate gunshot frequencies; analyze and classify the gunshot frequencies under a subcategory selected from true gunshot frequencies, noise frequencies, or a combination thereof; calculate a Time Difference of Arrival (TDOA) of gunshot frequencies classified under the true gunsh ot subcategory; calculate a Direction of Arrival (DoA) using the calculated Time Difference of Arrival (TDOA) from the true gunshot frequencies; determine a location based on the calculated Time Difference of Arrival (TDOA), and the calculated Direction of Arrival (DoA) of the true gunshot frequencies; and display the determined location on a display unit.
[007] Embodiments in accordance with the present invention further provide a method for detecting a direction of a gunshot using a system for gunshot detection and direction localization. The method comprising steps of: receiving digital sound waves from a conversion unit; conducting a bandpass filtering on the received digital sound waves to isolate gunshot frequencies; analyzing and classifying the gunshot frequencies under a subcategory selected from true gunshot frequencies, noise frequencies, or a combination thereof; calculating a Time Difference of Arrival (TDOA) of gunshot frequencies classified under the true gunshot subcategory; calculating a Direction of Arrival (DoA) using the calculated Time Difference of Arrival (TDOA) from the true gunshot frequencies; determining a location based on the calculated Time Difference of Arrival (TDOA), and the calculated Direction of Arrival (DoA) of the true gunshot frequencies; and displaying the determined location on a display unit.
[008] Embodiments of the present invention may provide a number of advantages depending on their particular configuration. First, embodiments of the present application may provide a system for gunshot detection and direction localization.
[009] Next, embodiments of the present application may provide a system for gunshot detection and direction localization that significantly improves precision of identifying the source of gunfire by leveraging spatial data from multiple microphones or advanced signal processing algorithms.
[0010] Next, embodiments of the present application may provide a system for gunshot detection and direction localization that provides real-time feedback, allowing military and security personnel to respond immediately to threats, potentially saving lives.
[0011] Next, embodiments of the present application may provide a system for gunshot detection and direction localization that minimizes false positives, ensuring reliable operation even in noisy or cluttered environments.
[0012] Next, embodiments of the present application may provide a system for gunshot detection and direction localization that uses multiple sensors or arrays to cover larger areas and detect gunfire from multiple directions, enhancing operational range and effectiveness.
[0013] Next, embodiments of the present application may provide a system for gunshot detection and direction localization that is designed to perform well in various terrains, weather conditions, and combat scenarios, providing consistent functionality despite external interferences.
[0014] Next, embodiments of the present application may provide a system for gunshot detection and direction localization that reduces setup time and training requirements that makes the system more user-friendly and accessible to a broader range of operators.
[0015] Next, embodiments of the present application may provide a system for gunshot detection and direction localization that optimizes design and leverages newer and more efficient technologies that result in the achievement of a balance between high performance and affordability.
[0016] Next, embodiments of the present application may provide a system for gunshot detection and direction localization that features scalable configurations that allow for flexible deployment, from individual units to networked systems in large areas.
[0017] Next, embodiments of the present application may provide a system for gunshot detection and direction localization that provides directional information and graphical displays enhance understanding of the operational environment, enabling informed decision-making under pressure.
[0018] Next, embodiments of the present application may provide a system for gunshot detection and direction localization that integrates with existing security or battlefield management tools that provides a seamless flow of information to enhance coordinated responses.
[0019] These and other advantages will be apparent from the present application of the embodiments described herein.
[0020] The preceding is a simplified summary to provide an understanding of some embodiments of the present invention. This summary is neither an extensive nor exhaustive overview of the present invention and its various embodiments. The summary presents selected concepts of the embodiments of the present invention in a simplified form as an introduction to the more detailed description presented below. As will be appreciated, other embodiments of the present invention are possible utilizing, alone or in combination, one or more of the features set forth above or described in detail below.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The above and still further features and advantages of embodiments of the present invention will become apparent upon consideration of the following detailed description of embodiments thereof, especially when taken in conjunction with the accompanying drawings, and wherein:
[0022] FIG. 1A illustrates a block diagram of a system for gunshot detection and direction localization, according to an embodiment of the present invention;
[0023] FIG. 1B illustrates a placement of hexagonal microphones on a baton, according to an embodiment of the present invention;
[0024] FIG. 1C illustrates a display unit, according to an embodiment of the present invention;
[0025] FIG. 1D illustrates an exemplary representation of the system for gunshot detection and direction localization, according to an embodiment of the present invention;
[0026] FIG. 2 illustrates a block diagram of a control unit of the system for gunshot detection and direction localization, according to an embodiment of the present invention; and
[0027] FIG. 3 depicts a flowchart of a method for detecting a direction of a gunshot using a system for gunshot detection and direction localization, according to an embodiment of the present invention.
[0028] The headings used herein are for organizational purposes only and are not meant to be used to limit the scope of the description or the claims. As used throughout this application, the word "may" is used in a permissive sense (i.e., meaning having the potential to), rather than the mandatory sense (i.e., meaning must). Similarly, the words “include”, “including”, and “includes” mean including but not limited to. To facilitate understanding, like reference numerals have been used, where possible, to designate like elements common to the figures. Optional portions of the figures may be illustrated using dashed or dotted lines unless the context of usage indicates otherwise.
DETAILED DESCRIPTION
[0029] The following description includes the preferred best mode of one embodiment of the present invention. It will be clear from this description of the invention that the invention is not limited to these illustrated embodiments but that the invention also includes a variety of modifications and embodiments thereto. Therefore, the present description should be seen as illustrative and not limiting. While the invention is susceptible to various modifications and alternative constructions, it should be understood, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the scope of the invention as defined in the claims.
[0030] In any embodiment described herein, the open-ended terms "comprising", "comprises”, and the like (which are synonymous with "including", "having” and "characterized by") may be replaced by the respective partially closed phrases "consisting essentially of", “consists essentially of", and the like or the respective closed phrases "consisting of", "consists of”, the like.
[0031] As used herein, the singular forms “a”, “an”, and “the” designate both the singular and the plural, unless expressly stated to designate the singular only.
[0032] FIG. 1A illustrates a block diagram of a system 100 (hereinafter referred to as the system 100) for gunshot detection and direction localization, according to an embodiment of the present invention. In an embodiment of the present invention, the system 100 may be adapted to detect a gunshot fired in a predefined geographical periphery. The system 100 may further be adapted to interpolate a location of the fired gunshot in the predefined geographical periphery, in an embodiment of the present invention.
[0033] In an embodiment of the present invention, the system 100 may capture acoustic disturbance created by the fired gunshot to detect the firing of the gunshot, and may further calculate a time delay of arrival of the created disturbances to interpolate the location of the gunshot fired. Further, the system 100 may be adapted to provide a navigational route to the location of the gunshot fired. The route provided may be traversed by authorities such as, but not limited to, an emergency medical attendant, a law enforcement agent, an ambulance, and so forth. Embodiments of the present invention are intended to include or otherwise cover any authorities who may approach the location of the gunshot fired using the provided navigation, including known, related art, and/or later developed technologies.
[0034] According to embodiments of the present invention, the system 100 may be installed at locations such as, but not limited to, a police station, a military base, a hospital, public places, and so forth. In a preferred embodiment of the present invention, the system 100 may be portable and may be carried along. Embodiments of the present invention are intended to include or otherwise cover any suitable location for installation of the system 100, including known, related art, and/or later developed technologies. According to another embodiment of the present invention, the system 100 may be a portable device, that may be installed on a vehicle, or in a backpack that may be carried by the authorities while patrolling.
[0035] According to embodiments of the present invention, the system 100 may comprise a baton 102, an array of hexagonal microphones 104a-104n (hereinafter referred individually to as the hexagonal microphone 104, and plurally to as the hexagonal microphones 104), a conversion unit 110, a bandpass filter 112, a control unit 114, and a display unit 116.
[0036] In an embodiment of the present invention, the baton 102 may be a long strength bearing rod. In an embodiment of the present invention, the baton 102 may comprise accommodation means (not shown) such as, but not limited to, grooves, channels, fins, and so forth to accommodate the array of hexagonal microphones 104a-104n. Further, the accommodation means may be adjustable, enabling an adjustment of the hexagonal microphone(s) 104 accommodated on the baton 102. Further, the baton 102 may adapted to be vertically held by the authorities or vertically mounted in the backpack or on the vehicle. Additionally, the baton 102 may comprise gripping means (not shown) or mounting means (not shown) for enhancing a grip and stability while holding or mounting the baton 102.
[0037] In an embodiment of the present invention, a height of the baton 102 may be vertically adjustable. The vertically adjustability of the height of the baton 102 may enable a furthermore elevation of the array of hexagonal microphones 104a-104n installed on the baton 102. The vertical adjustability of the baton 102 may enable a raise of the baton 102 to a preset height. The vertical adjustability of the baton 102 may establish a non-invasive contact of the hexagonal microphones 104 to capture the analogue sound waves from the surroundings.
[0038] According to embodiments of the present invention, the baton 102 may be constructed of any material such as, but not limited to, a metallic material, a wooden material, a glass material, a plastic material, and so forth. In a preferred embodiment of the present invention, the baton 102 may be construed as an electromagnetically nilpotent material. Embodiments of the present invention are intended to include or otherwise cover any material for the fixed-point suspension frame 102, including known, related art, and/or later developed technologies.
[0039] According to embodiments of the present invention, the baton 102 may be constructed of shapes such as, but not limited to, a cylindrical shape, a cuboidal shape, a semi-cylindrical shape, and so forth. Embodiments of the present invention are intended to include or otherwise cover any shape of the baton 102, including known, related art, and/or later developed technologies.
[0040] In an embodiment of the present invention, the hexagonal microphones 104 adapted to capture analogue sound waves from surroundings. The hexagonal microphones 104 may be strategically placed on the baton 102. The strategical placement of the hexagonal microphones 104 on the baton 102 may enhance the capturing of the analogue sound waves from the surroundings. In an embodiment of the present invention, the placement of the hexagonal microphones 104 on the baton 102 may further be explained in conjunction with FIG. 1B.
[0041] According to embodiments of the present invention, the hexagonal microphones 104 may be, but not limited to, a unidirectional microphone, a bidirectional microphone, and so forth. In a preferred embodiment of the present invention, the hexagonal microphones 104 may be an omnidirectional microphone. Embodiments of the present invention are intended to include or otherwise cover any type of the hexagonal microphones 104, including known, related art, and/or later developed technologies.
[0042] In an embodiment of the present invention, a power supply 106 may be adapted to supply operational voltage and power requirements to the hexagonal microphones 104. According to embodiments of the present invention, the power supply 106 may be, but not limited to, a battery powered supply, a wall outlet powered supply, a solar powered supply, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the power supply 106, including known, related art, and/or later developed technologies.
[0043] In an embodiment of the present invention, the hexagonal microphones 104 may be internally channeled and may comprise a singular signal output pin 108 (hereinafter individually referred as to the signal output pin 108 or signal output pins 108 in plurality). The singular signal output pin 108 may be adapted to be physically plugged into the conversion unit 110. In such embodiments, ‘n’ hexagonal microphones 104 may have one signal output pin 108 that may further be plugged into the conversion unit 110.
[0044] In another embodiment of the present invention, the hexagonal microphones 104 may be internally independent and may comprise a plurality of the signal output pin 108. The plurality of the signal output pin 108 may be adapted to be physically plugged into a singular conversion unit 110. In such embodiments, ‘n’ hexagonal microphones 104 may have ‘n’ signal output pins 108 that may further be plugged into the conversion unit 110.
[0045] In yet another embodiment of the present invention, the hexagonal microphones 104 may be internally independent and may comprise a plurality of the signal output pin 108. The plurality of the signal output pin 108 may be adapted to be physically plugged into an individual and respective conversion unit(s) 110. In such embodiments, ‘n’ hexagonal microphones 104 may have ‘n’ signal output pins 108 that may further be plugged into ‘n’ conversion unit 110.
[0046] In an embodiment of the present invention, the conversion unit 110 may be adapted to receive the captured analogue sound waves from the hexagonal microphones 104, via the signal output pin 108. Further, the conversion unit 110 may be adapted to convert the captured analogue sound waves into digital sound waves.
[0047] According to embodiments of the present invention, the conversion unit 110 may be, but not limited to, a multiplexer, a duplexer, and so forth. In a preferred embodiment of the present invention, the conversion unit 110 may be an Analogue to Digital Converter (ADC). Embodiments of the present invention are intended to include or otherwise cover any type of the shape of the conversion unit 110, including known, related art, and/or later developed technologies.
[0048] Further, the digital sound waves converted by the conversion unit 110 may be passed through the band pass filter 112. As the band pass filter 112 may be configured to operate in a frequency range of 1 Kilohertz (KHz) to 3 Kilohertz (KHz), the band pass filter 112 may filter out frequencies below 1 Kilohertz (KHz) and above 3 Kilohertz (KHz) from the digital sound waves. Upon filtration by the band pass filter 112, the received digital sound waves may be restricted in the frequency range of 1 Kilohertz (KHz) to 3 Kilohertz (KHz).
[0049] In an embodiment of the present invention, the control unit 114 may be connected to the conversion unit 110. In another embodiment of the present invention, the control unit 114 may be connected to band pass filter 112. The control unit 114 may be adapted to receive the digital sound waves from the conversion unit 110 or the band pass filter 112. The control unit 114 may further be configured to detect and locate the gunshot from the received digital sound waves.
[0050] The control unit 114 may further be configured to execute computer-executable instructions to generate an output relating to the system 100. According to embodiments of the present invention, the control unit 114 may be, but not limited to, a Programmable Logic Control (PLC) unit, a microprocessor, a development board, and so forth. In a preferred embodiment of the present invention, the control unit 114 may be a Field Programmable Gate Array (FPGA). Embodiments of the present invention are intended to include or otherwise cover any type of the control unit 114 including known, related art, and/or later developed technologies. In an embodiment of the present invention, the control unit 114 may further be explained in conjunction with FIG. 2.
[0051] In an embodiment of the present invention, the display unit 116 may be connected to the control unit 114. The display unit 116 may be adapted to display the location of the gunshot, in an embodiment of the present invention. In an embodiment of the present invention, the display unit 116 may further be adapted to display the route towards the location of the gunshot. In an embodiment of the present invention, the display unit 116 may further be explained in conjunction with FIG. 1C.
[0052] FIG. 1B illustrates the placement of the hexagonal microphones 104 on the baton 102, according to an embodiment of the present invention. The hexagonal microphones 104 may be distributively placed on the baton 102. The distributed placement of the hexagonal microphones 104 may ensure a maximum distance possible between any of the two hexagonal microphones 104. Further, the hexagonal microphones 104 may exhibit a flexible malleability with the baton 102.
[0053] The flexible malleability may enable a first microphone 104a to be directed towards a lower-back direction. The direction of the first microphone 104a towards the lower-back direction may enable the first microphone 104a to capture analogue sound waves from the lower-back direction of the surroundings.
[0054] The flexible malleability may further enable a second microphone 104b to be directed in a middle-back direction. The direction of the second microphone 104b towards the middle-back direction may enable the second microphone 104b to capture analogue sound waves from the middle-back direction of the surroundings.
[0055] The flexible malleability may further enable a third microphone 104c to be directed in a top-right direction. The direction of the third microphone 104c towards the top-right direction may enable the third microphone 104c to capture analogue sound waves from the top-right direction of the surroundings.
[0056] The flexible malleability may further enable a fourth microphone 104d to be directed toward a top-left direction. The direction of the fourth microphone 104d towards the top-left direction may enable the fourth microphone 104d to capture analogue sound waves from the top-left direction of the surroundings.
[0057] The flexible malleability may further enable a fifth microphone 104e to be directed toward a middle-front direction. The direction of the fifth microphone 104e towards the middle-front direction may enable the fifth microphone 104e to capture analogue sound waves from the middle-front direction of the surroundings.
[0058] The flexible malleability may further enable a nth microphone 104n to be directed towards a lower-front direction. The direction of the fifth microphone 104e towards the lower-front direction may enable the fifth microphone 104e to capture analogue sound waves from the lower-front direction of the surroundings.
[0059] According to embodiments of the present invention, the hexagonal microphones 104 in the array of hexagonal microphones 104a-104n may be arranged in patterns of configuration such as, but not limited to, a star pattern, a ring patter, a hub pattern, a bus pattern, and so forth. Embodiments of the present invention are intended to include or otherwise cover any pattern of configurations of the hexagonal microphones 104 in the array of hexagonal microphones 104a-104n, including known, related art, and/or later developed technologies.
[0060] In an embodiment of the present invention, the array of hexagonal microphones 104a-104n may comprise ‘n’ microphone(s) 104, where ‘n’ is a natural number. In a preferred embodiment of the present invention, the array of hexagonal microphones 104a-104n may comprise 6 microphones. Embodiments of the present invention are intended to include or otherwise cover any number of microphone(s) 104 in the array of hexagonal microphones 104a-104n.
[0061] FIG. 1C illustrates the display unit 116, according to an embodiment of the present invention. The display unit 116 may be adapted to display the location of the gunshot, in an embodiment of the present invention. In an embodiment of the present invention, the display unit 116 may further be adapted to display the route towards the location of the gunshot.
[0062] In an embodiment of the present invention, the location and the route towards the gunshot may be displayed in x° North, y° East coordinated format. In another embodiment of the present invention, the location and the route towards the gunshot may be displayed in x° North y minute and z second, a° East b minute and c second coordinated format. In yet another embodiment of the present invention, the location and the route toward the gunshot may be displayed in an angular cartesian format.
[0063] According to embodiments of the present invention, the display unit 116 may further be adapted to display a set of information related to the gunshot such as, but not limited to, a type of ammunition fired, a type of weapon fired, a target of the gunshot, and so forth. Embodiments of the present invention are intended to include or otherwise cover any information related to the gunshot that may be displayed on the display unit 116 including known, related art, and/or later developed technologies.
[0064] According to embodiments of the present invention, the display unit 116 may be, but not limited to, a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display, an Organic Light Emitting Diode (OLED) display, and so forth. In a preferred embodiment of the present invention, the display unit 116 may be a graphical Liquid Crystal Display (LCD). Further, the display unit 116 may feature a backlight that may be turned on and/or turned off based on a requirement. Embodiments of the present invention are intended to include or otherwise cover any type of the display unit 116 including known, related art, and/or later developed technologies.
[0065] FIG. 1D illustrates an exemplary representation of the system 100, according to an embodiment of the present invention. In an exemplary scenario, the system 100 may be utilized handheld by an authority. The authority may set up the baton 102 in the backpack. Further, the baton 102 may be vertically mounted in the backpack. The authority may further expand the accommodation means to accommodate the array of hexagonal microphones 104a-104n. Upon establishment of the baton 102 in the backpack, the authority may carry the display unit 116 in their hands. In such embodiments of the present invention, the system 100 may exhibit portability and may be utilized in any terrain or scenario.
[0066] FIG. 2 illustrates a block diagram of the control unit 114 of the system 100, according to an embodiment of the present invention. The control unit 114 may comprise the computer-executable instructions in form of programming modules such as a data receiving module 200, a data filtering module 202, a data analysis module 204, a data determination module 206, and a data display module 208.
[0067] In an embodiment of the present invention, the data receiving module 200 may be configured to receive the digital sound waves from the conversion unit 110. The data receiving module 200 may further be configured to transmit the received digital sound waves to the data filtering module 202.
[0068] The data filtering module 202 may be activated upon receipt of the digital sound waves from the data receiving module 200. In an embodiment of the present invention, the data filtering module 202 may be configured to engage the band pass filter 112 to conduct a bandpass filtering on the received digital sound waves. Upon conduction of the bandpass filtering, gunshot frequencies may be isolated from the received digital sound waves. The data filtering module 202 may further be configured to transmit the filtered gunshot frequencies to the data analysis module 204.
[0069] The data analysis module 204 may be activated upon receipt of the gunshot frequencies from the data filtering module 202. In an embodiment of the present invention, the data analysis module 204 may be configured to analyze the gunshot frequencies. Further, upon analysis of the gunshot frequencies, the data analysis module 204 may be configured to classify the gunshot frequencies under a subcategory such as, but not limited to, true gunshot frequencies, noise frequencies, and so forth. The classification of the gunshot frequencies may be carried out using a Field Programmable Gate Array (FPGA) based sound classification.
[0070] Further, upon classification of the gunshot frequencies under the true gunshot frequencies, the data analysis module 204 may be configured to calculate a Time Difference of Arrival (TDOA) of gunshot frequencies classified under the true gunshot subcategory. The Time Difference of Arrival (TDOA) may be a mathematical algorithm that may be equated to measure a time difference between a departure and an arrival of signals. The Time Difference of Arrival (TDOA) of gunshot frequencies may be calculated by subtracting two consecutive gunshot frequencies classified under the true gunshot subcategory.
[0071] Further, upon calculation of the Time Difference of Arrival (TDOA) of gunshot frequencies classified under the true gunshot subcategory, the data analysis module 204 may be configured to calculate a Direction of Arrival (DoA). The Direction of Arrival (DoA) may be calculated using the Time Difference of Arrival (TDOA) from the true gunshot frequencies. The calculated Direction of Arrival (DoA) may provide a vector unit from the calculated Time Difference of Arrival (TDOA).
[0072] Further, the calculated Time Difference of Arrival (TDOA) and the Direction of Arrival (DoA) may be transmitted to the data determination module 206.
[0073] The data determination module 206 may be activated upon receipt of the calculated Time Difference of Arrival (TDOA) and the Direction of Arrival (DoA) from the data analysis module 204. In an embodiment of the present invention, the data determination module 206 may be configured to determine the location of the gunshot. The location of the gunshot may be determined using a direction localization technique. Additionally, the location of the gunshot may be determined on the basis of the calculated Time Difference of Arrival (TDOA), and the calculated Direction of Arrival (DoA) of the true gunshot frequencies.
[0074] Further, the determined location of the gunshot may be transmitted to the data display module 208.
[0075] The data display module 208 may be activated upon receipt of the determined location of the gunshot from the data determination module 206. In an embodiment of the present invention, the data display module 208 may be configured to display the determined location on the display unit 116.
[0076] In an exemplary embodiment of the present invention, the determined location on the display unit 116 may be represented in x° North, y° East coordinated format. In another exemplary embodiment of the present invention, the determined location on the display unit 116 may be represented in x° North y minute and z second, a° East b minute and c second coordinated format. In yet another exemplary embodiment of the present invention, the determined location on the display unit 116 may be represented in any format.
[0077] FIG. 3 depicts a flowchart of a method 300 for detecting the direction of the gunshot using the system 100, according to an embodiment of the present invention.
[0078] At step 302, the system 100 may receive the digital sound waves from the conversion unit 110.
[0079] At step 304, the system 100 may conduct the bandpass filtering on the received digital sound waves to isolate gunshot frequencies using a bandpass filter 112.
[0080] At step 306, the system 100 may analyze and classify the gunshot frequencies under the subcategory such as, but not limited to, the true gunshot frequencies, the noise frequencies, and so forth.
[0081] At step 308, the system 100 may calculate the Time Difference of Arrival (TDOA) of the gunshot frequencies classified under the true gunshot subcategory.
[0082] At step 310, the system 100 may calculate the Direction of Arrival (DoA) using the calculated Time Difference of Arrival (TDOA) from the true gunshot frequencies.
[0083] At step 312, the system 100 may determine the location based on the calculated Time Difference of Arrival (TDOA), and the calculated Direction of Arrival (DoA) of the true gunshot frequencies.
[0084] At step 314, the system 100 may display the determined location on the display unit 116.
[0085] While the invention has been described in connection with what is presently considered to be the most practical and various embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.
[0086] This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined in the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements within substantial differences from the literal languages of the claims. , Claims:CLAIMS
I/We Claim:
1. A system (100) for gunshot detection and direction localization, the system (100) comprising:
an array of hexagonal microphones (104a-104n), installed on a baton (102), adapted to capture analogue sound waves from surroundings, wherein each of the hexagonal microphones comprises a signal output pin (108);
a conversion unit (110), connected to the array of hexagonal microphones (104a-104n) through the single output pin of the hexagonal microphones, adapted to convert the captured analogue sound waves into digital sound waves; and
a control unit (114) communicatively connected to the conversion unit (110), characterized in that the control unit (114) is configured to:
receive the digital sound waves from the conversion unit (110);
conduct a bandpass filtering on the received digital sound waves to isolate gunshot frequencies using a band pass filter (112);
analyze and classify the gunshot frequencies under a subcategory selected from true gunshot frequencies, noise frequencies, or a combination thereof;
calculate a Time Difference of Arrival (TDOA) of gunshot frequencies classified under the true gunshot subcategory;
calculate a Direction of Arrival (DoA) using the calculated Time Difference of Arrival (TDOA) from the true gunshot frequencies;
determine a location based on the calculated Time Difference of Arrival (TDOA), and the calculated Direction of Arrival (DoA) of the true gunshot frequencies; and
display the determined location on a display unit (116).
2. The system (100) as claimed in claim 1, wherein the signal output pin (108), of the hexagonal microphones, is physically plugged into the conversion unit (110).
3. The system (100) as claimed in claim 1, wherein the hexagonal microphones are omnidirectional and are adjustable to accommodate different patterns of configurations.
4. The system (100) as claimed in claim 1, wherein the display unit (116) is adapted to display a route towards the determined location.
5. The system (100) as claimed in claim 1, wherein the display unit (116) is a graphical Liquid Crystal Display (LCD).
6. The system (100) as claimed in claim 1, wherein the baton (102) is vertically adjustable and adapted to be raised at a preset height to establish a non-invasive contact of the hexagonal microphones to capture the analogue sound waves from the surroundings.
7. The system (100) as claimed in claim 1, wherein the control unit (114) is a Field Programmable Gate Array (FPGA).
8. The system (100) as claimed in claim 1, wherein the band pass filter (112) is adapted to operate in a frequency range of 1 Kilohertz (KHz) to 3 Kilohertz (KHz).
9. The system (100) as claimed in claim 1, comprising a power supply (106) to fulfill voltage requirements of the hexagonal microphones.
10. A method (300) for detecting a direction of a gunshot using a system (100) for gunshot detection and direction localization, the method (300) is characterized by steps of:
receiving digital sound waves from a conversion unit (110);
conducting a bandpass filtering on the received digital sound waves to isolate gunshot frequencies using a bandpass filter (112);
analyzing and classifying the gunshot frequencies under a subcategory selected from true gunshot frequencies, noise frequencies, or a combination thereof;
calculating a Time Difference of Arrival (TDOA) of gunshot frequencies classified under the true gunshot subcategory;
calculating a Direction of Arrival (DoA) using the calculated Time Difference of Arrival (TDOA) from the true gunshot frequencies;
determining a location based on the calculated Time Difference of Arrival (TDOA), and the calculated Direction of Arrival (DoA) of the true gunshot frequencies; and
displaying the determined location on a display unit (116).
Date: November 28, 2024
Place: Noida

Nainsi Rastogi
Patent Agent (IN/PA-2372)
Agent for the Applicant