A five-element silicon microphone device and positioning method for sound source positioning of rock sample fracturing points

Abstract

The present invention discloses a five-element silicon microphone device and method for acoustically locating rock sample fracturing points. The device comprises a five-element silicon microphone array device, a multi-channel acquisition system, and a rock sample loading device. The five-element silicon microphone device is used to acquire the sound signal generated by fracturing during a uniaxial rock sample test. A specific arrangement of five-element silicon microphones is then arranged to non-contactly determine the rock sample fracturing location. The three-dimensional spatial coordinates of the fracturing location are determined based on the arrival time difference of the sound signal. A data processing algorithm is used to perform noise reduction and filtering on the sound signal. Finally, a lead-breaking test is used to calibrate the sound source localization effectiveness of the five-element silicon microphone device. This invention provides a non-contact measurement device and method for studying the three-dimensional coordinates of fracturing locations during rock sample loading experiments using acoustic source localization.

Description

Technical Field

[0001] The present invention relates to the technical fields of acoustic measurement and rock loading experiments, and in particular to a five-element silicon microphone device and a positioning method for locating a rock sample fracturing point by sound source. Background Art

[0002] In the field of geotechnical mechanics, studying the structure and properties of rocks is of vital importance for the subsequent effective utilization of rocks and efficient mining. Rock sample loading devices are usually used to simulate the process changes of fracturing rock samples in real engineering environments to study the structure and properties of rock samples. In this process, cracks will be generated and evolved, and many sound signals will be generated during the evolution of cracks. In previous studies, acoustic emission sensors were usually used as sound sources to locate rock fracturing sites, but there are problems such as high economic cost, large device space occupation, and coupling requirements.

[0003] In order to solve the above-mentioned technical problems, it is urgent to design a five-element silicon microphone device and positioning method for sound source positioning of rock sample fracturing points. The silicon microphone is an acoustic sensor with a small size, low operating current, low power consumption, good stability, and can effectively collect sound signals. The five-element silicon microphone device designed at a special position can effectively locate the sound source of the rock sample fracturing site, and calculate the three-dimensional coordinates of the rock sample fracturing site, providing a non-contact measurement device and method for studying the three-dimensional coordinates of the fracturing site during the sound source positioning rock sample loading experiment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the defects in the existing technology and provide a five-element silicon microphone device and positioning method for sound source positioning of rock sample fracturing points, which can calculate the three-dimensional coordinates of the rock fracturing site under non-contact conditions.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] The present invention provides a five-element silicon microphone device for locating rock sample fracturing points with sound sources, the device comprising: a five-element silicon microphone array device, a multi-channel acquisition system, and a rock sample loading device; wherein:

[0007] The five-element silicon microphone array device includes five silicon microphones with omnidirectional directivity, and the five silicon microphones are arranged in a certain shape to form a five-element silicon microphone array;

[0008] The multi-channel acquisition system includes a multi-channel acquisition instrument, a preamplifier, and data processing software; one end of the multi-channel acquisition instrument is connected to a five-element silicon microphone array device via the preamplifier, and the other end is electrically connected to the data processing software. The multi-channel acquisition instrument is used to collect sound signal data generated by rock sample fracturing collected by the five-element silicon microphone array;

[0009] The rock sample loading device is used to place rock samples and control experimental conditions;

[0010] The sound signal data generated by rock sample fracturing is collected by a five-element silicon microphone array, amplified by a preamplifier and sent to a multi-channel acquisition instrument. The sound signal data is then processed by data processing software to obtain the coordinates of the sound source during rock sample fracturing.

[0011] Furthermore, the five-element silicon microphone array device of the present invention includes a first silicon microphone, a second silicon microphone, a third silicon microphone, a fourth silicon microphone, a fifth silicon microphone and a silicon microphone array housing; the first silicon microphone, the second silicon microphone, the third silicon microphone and the fourth silicon microphone are arranged in a triangular pyramid shape, the fifth silicon microphone is arranged at the center of the bottom surface of the triangular pyramid, and the silicon microphone array housing is arranged on the outer surface of the triangular pyramid.

[0012] Furthermore, the performance indicators of the silicon microphone in the five-element silicon microphone array device of the present invention are: omnidirectional directionality collection of 50 to 20,000 Hz frequency sound wave signals, waterproof grade of IP67, and sensitivity of -22 to -62 dB.

[0013] Furthermore, the sampling frequency of the multi-channel acquisition instrument of the present invention is set to 20kHz to 100kHz.

[0014] Furthermore, the rock sample loading device of the present invention includes a rock sample loading host, a rock sample placement table, and loading control software; the rock sample placement table is placed on the rock sample loading host for placing rock samples; and the experimental conditions are controlled by the loading control software.

[0015] The present invention provides a positioning method of a five-element silicon microphone device for sound source positioning of a rock sample fracturing point, the method comprising the following steps:

[0016] Step 1: Place the rock sample to be tested on the rock sample loading device and place the five-element silicon microphone array device on the side of the rock sample;

[0017] Step 2: Use the lead breaking experiment to calibrate the sound source localization effect of the five-element silicon microphone array device;

[0018] Step 3: Setting the specific parameters of the rock sample fracturing experiment on the rock sample loading device;

[0019] Step 4: Use a multi-channel acquisition system to collect sound signal data generated by rock sample fracturing;

[0020] Step 5: Process the sound signal data collected by the multi-channel acquisition system to obtain the rock sample fracturing location.

[0021] Furthermore, the method for calibrating the sound source localization effect of the five-element silicon microphone array device using the lead-breaking experiment in step 2 of the present invention includes:

[0022] Step 2.1: Extend a lead core of a certain diameter to a certain length, with the lead core forming a certain angle with the test surface of the rock sample. Perform a lead breaking test at different locations on the rock sample surface, and repeat the test multiple times at each lead breaking location.

[0023] Step 2.2: Use a multi-channel acquisition system to collect the sound signals generated by the lead breaking experiment;

[0024] Step 2.3: The collected lead break sound signal is input into the data processing software for data processing to ensure that the error between the coordinates calculated by locating the lead break site by the sound source and the coordinates of the actual lead break site does not exceed a certain threshold, which means that the calibration is considered to be successful.

[0025] Furthermore, the lead core of the present invention is an HB lead core with a diameter of 0.5 mm, a protruding length of the lead core of 2.5 mm, and an angle between the lead core and the measured surface of 30°.

[0026] Furthermore, in step 5 of the present invention, the method of processing the sound signal data collected by the multi-channel acquisition system to obtain the rock sample fracturing site includes:

[0027]

[0028] Among them, (x, y, z) are the specific coordinates of the rock sample fracturing site, (x i ,y i , z i ) is the specific coordinate of the i-th silicon microphone, c is the speed of sound propagation in the rock sample, t i is the specific time when the i-th silicon microphone receives the sound signal generated by the rock sample fracturing, and t0 is the specific time when the sound signal is generated at the rock sample fracturing site;

[0029] After substituting the specific coordinate points of the five-element silicon microphone array:

[0030]

[0031] Squaring both sides of all equations gives:

[0032]

[0033] Set the silicon microphones at specific positions. Take the first silicon microphone as the origin (0,0,0), the coordinates of the second silicon microphone as (1,0,0), the coordinates of the third silicon microphone as (0,1,0), the coordinates of the fourth silicon microphone as (0,0,1), and the coordinates of the fifth silicon microphone as (0.5, 0.5, 0). Set the first to fifth silicon microphones on the silicon microphone array housing according to the coordinates. Substitute the silicon microphone coordinate values to obtain:

[0034]

[0035] make get:

[0036]

[0037] The specific coordinates of the rock fracturing site are obtained by solving the problem.

[0038] Furthermore, the specific method of the present invention for obtaining the specific coordinates of the rock fracturing site is:

[0039] The sound source localization effect of the five-element silicon microphone array device was calibrated using the lead breaking experiment, and the speed of sound propagation c in the rock sample was calculated;

[0040] According to the specific arrangement of the five-element silicon microphone array, |A|≠0, that is, the matrix A is a non-singular matrix, then x, y, z, t0 all have a unique solution, and the specific coordinate point of the rock fracturing site can be obtained.

[0041] The beneficial effects produced by the present invention are:

[0042] 1. The present invention provides a five-element silicon microphone device and method for acoustically locating fracture points in rock samples. A rock sample loading experiment is performed on the rock sample using a rock sample loading device. The five-element silicon microphone device collects the sound signals generated during the rock sample loading process. Data processing software performs noise reduction filtering on the collected sound signals. The collected sound signals are then calculated using the time difference of arrival of the sound to obtain the three-dimensional coordinates of the fracture points generated during the rock sample loading process. This invention enables the five-element silicon microphone device to determine the three-dimensional coordinates of the fracture points during the rock sample loading experiment.

[0043] 2. This invention provides a method for setting up a five-element silicon microphone device. By arranging the silicon microphones in a specific pattern, a five-element silicon microphone array is formed, which can effectively measure and collect the sound signals generated during rock sample loading. Furthermore, during the computational solution, the special arrangement of the five-element silicon microphone array is combined to ensure that |A| ≠ 0, that is, the matrix A is non-singular. In this way, x, y, z, and t0 each have a unique solution, and the specific coordinates of the rock fracturing site can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0045] Figure 1 This is a schematic diagram of the operation of the five-element silicon microphone array device for sound source positioning of rock sample fracturing points according to the present invention;

[0046] Figure 2 This is a schematic flow chart of an implementation method of a five-element silicon microphone array device for acoustically locating rock sample fracturing points according to the present invention;

[0047] In the figure: 1. Five-element silicon microphone array device; 11. First silicon microphone; 12. Second silicon microphone; 13. Third silicon microphone; 14. Fourth silicon microphone; 15. Fifth silicon microphone; 16. Silicon microphone array housing; 2. Multi-channel acquisition system; 21. Multi-channel acquisition instrument; 22. Preamplifier; 23. Data processing software; 3. Rock sample loading device; 31. Rock sample loading host; 32. Rock sample placement table; 33. Loading control software. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] Example 1: Device Example

[0050] like Figure 1 As shown, a five-element silicon microphone device for acoustically locating rock sample fracturing points according to an embodiment of the present invention comprises: a five-element silicon microphone array device 1, a multi-channel acquisition system 2, and a rock sample loading device 3; wherein:

[0051] The five-element silicon microphone array device 1 includes five silicon microphones with omnidirectional directivity, and the five silicon microphones are arranged in a certain shape to form a five-element silicon microphone array;

[0052] In a preferred embodiment of the present invention, the five-element silicon microphone array device 1 includes a first silicon microphone 11, a second silicon microphone 12, a third silicon microphone 13, a fourth silicon microphone 14, a fifth silicon microphone 15 and a silicon microphone array housing 16; the first silicon microphone 11, the second silicon microphone 12, the third silicon microphone 13, and the fourth silicon microphone 14 are arranged in a triangular pyramid shape, the fifth silicon microphone 15 is arranged at the center of the bottom surface of the triangular pyramid, and the silicon microphone array housing 16 is arranged on the outer surface of the triangular pyramid.

[0053] Furthermore, in the selection of silicon microphones in the embodiment of the present invention, the first to fifth silicon microphones are omnidirectional and can collect sound wave signals with a frequency of 50 to 20,000 Hz, have a waterproof grade of IP67 and can be immersed and waterproof, and have a sensitivity of -22 to -62 dB.

[0054] The multi-channel acquisition system 2 includes a multi-channel acquisition instrument 21, a preamplifier 22, and data processing software 23; one end of the multi-channel acquisition instrument 21 is connected to the five-element silicon microphone array device 1 through the preamplifier 22, and the other end is electrically connected to the data processing software 23. The multi-channel acquisition instrument 21 is used to collect the sound signal data generated by rock sample fracturing collected by the five-element silicon microphone array.

[0055] In a preferred embodiment of the present invention, the sampling frequency of the multi-channel acquisition instrument 21 can be set to 20 kHz to 100 kHz.

[0056] The rock sample loading device 3 is composed of a rock sample loading host 31 , a rock sample placement platform 32 , and loading control software 33 .

[0057] In a preferred embodiment of the present invention, the rock sample loading host 31 can perform rock sample fracturing experiments on rock samples with a maximum size of 300mm×300mm×300mm; the rock sample placement table 32 is used to place rock samples, and can accommodate rock samples with a maximum size of 300mm×300mm×300mm;

[0058] The first to fifth silicon microphones are connected to the preamplifier 22, and then the multi-channel acquisition instrument 21 is used to collect the sound signal data generated by the rock sample fracturing collected by the first to fifth silicon microphones. The sound signal data is processed by the data processing software 23 to obtain the sound source coordinates during the rock sample fracturing. The rock sample placement table 32 is placed on the rock sample loading host 31 for placing the rock sample. The experimental conditions are controlled by the loading control software 33, thereby forming the five-element silicon microphone device for sound source positioning of the rock sample fracturing point as described in the present invention.

[0059] Example 2: Calculation Algorithm Example

[0060] Based on the device of Example 1, the embodiment of the present invention provides calculation algorithms and formulas related to the data processing software 23, specifically including:

[0061] The five-element silicon microphone array device 1 can calculate the coordinates of the rock sample fracturing site using formula (1), which is as follows:

[0062]

[0063] In formula (1), (x, y, z) are the specific coordinates of the rock sample fracturing site, (x i ,y i, z i ) is the specific coordinate of the i-th silicon microphone, c is the speed of sound propagation in the rock sample, t i is the specific time when the i-th silicon microphone receives the sound signal generated by the rock sample fracturing, and t0 is the specific time when the sound signal is generated at the rock sample fracturing site;

[0064] The arrangement of the five-element silicon microphone array must be in accordance with specific requirements to obtain the specific coordinates of the rock sample fracturing site. First, formula (1) is written into the complete formula (2), which is as follows:

[0065]

[0066] (x, y, z) is the specific three-dimensional coordinate of the rock sample fracturing site, c is the propagation speed of sound in the rock sample, and t0 is the specific time when the sound signal is generated at the rock sample fracturing site. The above five data are all unknowns. Now formula (2) has five formulas. Square both sides of formula (2) to obtain formula (3). Formula (3) is as follows:

[0067]

[0068] In order to calculate the coordinates of the sound source point more quickly later, the silicon microphones can be set at specific positions. The first silicon microphone 11 is recorded as the origin (0,0,0), the coordinates of the second silicon microphone 12 are (1,0,0), the coordinates of the third silicon microphone 13 are (0,1,0), the coordinates of the fourth silicon microphone 14 are (0,0,1), and the coordinates of the fifth silicon microphone 15 are (0.5, 0.5, 0). The first to fifth silicon microphones are set on the silicon microphone array housing 16 according to the above coordinates. Then, formula (3) can be substituted into the above silicon microphone coordinate values to be written as formula (4). Formula (4) is as follows:

[0069]

[0070] make The above formula (4) can be rewritten as formula (5), which is as follows:

[0071]

[0072] The sound source localization effect of the five-element silicon microphone array device 1 is calibrated using a lead breaking experiment, and the speed c of sound propagation in the rock sample can be calculated;

[0073] According to the arrangement of the silicon microphones in the present invention, |A|≠0, that is, the matrix A is a non-singular matrix, then x, y, z, t0 all have unique solutions, and the specific coordinates of the rock fracturing site can be obtained.

[0074] Example 3: Positioning method example

[0075] like Figure 2 As shown, the present invention also provides a positioning method of a five-element silicon microphone device for sound source positioning of a rock sample fracturing point, comprising the following steps:

[0076] Step 1: Place the five-element silicon microphone array device 1 on the side of the rock sample to be tested;

[0077] Step 2: Calibrate the sound source localization effect of the five-element silicon microphone array device 1 using a lead-breaking experiment;

[0078] Step 3: The rock sample loading device 3 sets specific parameters for the rock sample fracturing experiment;

[0079] Step 4: using the multi-channel acquisition system 2 to collect the sound signal generated by the rock sample fracturing;

[0080] Step 5: Process the sound signals collected by the multi-channel acquisition system 2, and the rock sample fracturing location can be calculated using formula (4):

[0081]

[0082] In formula (4), (x, y, z) is the specific coordinate of the rock sample fracturing site, c is the speed of sound propagation in the rock sample, t0 is the specific time when the sound signal is generated at the rock sample fracturing site, and m is the placement location of the fifth microphone.

[0083] The lead-breaking experiment for calibrating the sound source localization performance of the five-element silicon microphone array device is implemented as follows:

[0084] Step 1: Place the five-element silicon microphone array device 1 on the side of the rock sample to be tested;

[0085] Step 2: Extend a 0.5mm diameter HB lead to a length of 2.5mm. At an angle of 30° between the lead and the test surface, perform a lead-breaking test at different locations on the rock sample surface. Repeat the test three times at each lead-breaking location to ensure the accuracy and reliability of the data.

[0086] Step 3: Use the multi-channel acquisition system 2 to collect the sound signal generated by the lead breaking experiment;

[0087] Step 4: input the collected lead break sound signal into the data processing software 23 for data processing, and ensure that the error between the coordinates calculated by locating the lead break position by the sound source and the actual lead break position coordinates does not exceed 10%, which means that the calibration is passed.

[0088] The technical features of the present invention are: (1) five silicon microphones are effectively integrated into a five-element silicon microphone device, making the sound monitoring device for rock and soil mechanics experiments more convenient, economical and efficient; (2) the five-element silicon microphone device can be used to non-contact monitor and collect the sound signals generated during the rock fracturing experiment; (3) the three-dimensional coordinates of the rock sample fracturing site are calculated using the arrival time difference algorithm for the sound signals collected by the five-element silicon microphone.

[0089] Finally, it should be noted that the above embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. However, these modifications, changes or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments of the present invention. They should all be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0090] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A five-element silicon microphone device for locating the sound source of a rock sample fracturing point, characterized in that: The device comprises: a five-element silicon microphone array device (1), a multi-channel acquisition system (2), and a rock sample loading device (3); wherein: The five-element silicon microphone array device (1) comprises five silicon microphones with omnidirectional directivity, and the five silicon microphones are arranged in a certain shape to form a five-element silicon microphone array; The multi-channel acquisition system (2) comprises a multi-channel acquisition instrument (21), a preamplifier (22), and data processing software (23); one end of the multi-channel acquisition instrument (21) is connected to the five-element silicon microphone array device (1) via the preamplifier (22), and the other end is electrically connected to the data processing software (23); the multi-channel acquisition instrument (21) is used to collect sound signal data generated by rock sample fracturing collected by the five-element silicon microphone array; The rock sample loading device (3) is used to place rock samples and control experimental conditions; The sound signal data generated by the rock sample fracturing is collected by the five-element silicon microphone array, amplified by the preamplifier (22) and sent to the multi-channel acquisition instrument (21), and the sound signal data is processed by the data processing software (23) to obtain the coordinates of the sound source during the rock sample fracturing; The five-element silicon microphone array device (1) comprises a first silicon microphone (11), a second silicon microphone (12), a third silicon microphone (13), a fourth silicon microphone (14), a fifth silicon microphone (15) and a silicon microphone array housing (16); the first silicon microphone (11), the second silicon microphone (12), the third silicon microphone (13) and the fourth silicon microphone (14) are arranged in a triangular pyramid shape, the fifth silicon microphone (15) is arranged at the center of the bottom surface of the triangular pyramid, and the silicon microphone array housing (16) is arranged on the outer surface of the triangular pyramid.

2. The five-element silicon microphone device for sound source positioning of rock sample fracturing points according to claim 1 is characterized in that: The performance indicators of the silicon microphone in the five-element silicon microphone array device (1) are: omnidirectional directivity collection of 50 to 20,000 Hz frequency sound wave signals, waterproof grade of IP67, and sensitivity of -22 to -62 dB.

3. The five-element silicon microphone device for acoustically locating rock sample fracturing points according to claim 1, characterized in that: The sampling frequency of the multi-channel acquisition instrument (21) is set to 20 kHz to 100 kHz.

4. The five-element silicon microphone device for acoustically locating rock sample fracturing points according to claim 1, characterized in that: The rock sample loading device (3) comprises a rock sample loading host (31), a rock sample placement table (32), and loading control software (33); the rock sample placement table (32) is placed on the rock sample loading host (31) and is used to place rock samples; and the experimental conditions are controlled by the loading control software (33).

5. A positioning method for a five-element silicon microphone device for locating a rock sample fracturing point using a sound source, characterized in that: The method comprises the following steps: Step 1: Place the rock sample to be tested on the rock sample loading device (3), and place the five-element silicon microphone array device (1) on the side of the rock sample; Step 2: Using a lead-breaking experiment to calibrate the sound source localization effect of the five-element silicon microphone array device (1); Step 3: Setting specific parameters of the rock sample fracturing experiment on the rock sample loading device (3); Step 4: using the multi-channel acquisition system (2) to collect the sound signal data generated by the rock sample fracturing; Step 5: Processing the sound signal data collected by the multi-channel acquisition system (2) to obtain the rock sample fracturing location; The specific method for solving the specific coordinate points of the rock fracturing site is: The sound source localization effect of the five-element silicon microphone array device (1) was calibrated using a lead breaking experiment, and the speed c of sound propagation in the rock sample was calculated; According to the specific arrangement of the five-element silicon microphone array, |A|≠0, that is, the matrix A is a non-singular matrix, then x, y, z, t0 all have a unique solution, (x, y, z) is the specific coordinate of the rock sample fracturing site, t0 is the specific time when the sound signal is generated at the rock sample fracturing site, and the specific coordinate point of the rock fracturing site can be obtained.

6. The positioning method of the five-element silicon microphone device for sound source positioning of rock sample fracturing points according to claim 5, characterized in that: The method for calibrating the sound source localization effect of the five-element silicon microphone array device (1) by using the lead-breaking experiment in step 2 includes: Step 2.1: Extend a lead core of a certain diameter to a certain length, with the lead core forming a certain angle with the test surface of the rock sample. Perform a lead breaking test at different locations on the rock sample surface, and repeat the test multiple times at each lead breaking location. Step 2.2: Use the multi-channel acquisition system (2) to collect the sound signal generated by the lead breaking experiment; Step 2.3: The collected lead-break sound signal is input into the data processing software (23) for data processing to ensure that the error between the coordinates calculated by locating the lead-break position by the sound source and the coordinates of the actual lead-break position does not exceed a certain threshold, and the calibration is considered to be passed.

7. The positioning method of the five-element silicon microphone device for sound source positioning of rock sample fracturing points according to claim 6, characterized in that: The lead core is an HB lead core with a diameter of 0.5 mm, a protruding length of the lead core of 2.5 mm, and an angle between the lead core and the measured surface of 30°.

8. The positioning method of the five-element silicon microphone device for sound source positioning of rock sample fracturing points according to claim 5, characterized in that: The method of processing the sound signal data collected by the multi-channel acquisition system (2) in step 5 to obtain the rock sample fracturing location includes: Among them, (x, y, z) are the specific coordinates of the rock sample fracturing site, (x i ,y i , z i ) is the specific coordinate of the i-th silicon microphone, c is the speed of sound propagation in the rock sample, t i is the specific time when the i-th silicon microphone receives the sound signal generated by the rock sample fracturing, and t0 is the specific time when the sound signal is generated at the rock sample fracturing site; After substituting the specific coordinate points of the five-element silicon microphone array: Squaring both sides of all equations gives: The silicon microphones are set at specific positions, with the first silicon microphone (11) being the origin (0,0,0), the coordinates of the second silicon microphone (12) being (1,0,0), the coordinates of the third silicon microphone (13) being (0,1,0), the coordinates of the fourth silicon microphone (14) being (0,0,1), and the coordinates of the fifth silicon microphone (15) being (0.5,0.5,0). The first to fifth silicon microphones are set on the silicon microphone array housing (16) according to the coordinates, and the coordinate values of the silicon microphones are input to obtain: make get: The specific coordinates of the rock fracturing site are obtained by solving the problem.

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