A method and device for implementing multi-point signal acquisition at an explosion site

Abstract

The present invention provides a method and device for implementing multi-point signal acquisition at an explosion site, wherein the method includes: arranging a measurement point simulation in a warhead or explosive drop zone, and correspondingly setting sensors to obtain acquisition information; connecting the sensors and a collector, and connecting the collector to an information synchronizer; configuring the acquisition parameters of the collector, including sampling rate, sensor sensitivity, sampling time, and trigger time; connecting the detonating wire loop of the signal synchronizer to the warhead or explosive; when the detonating wire loop is broken, sending an on-off signal to start the signal synchronizer, triggering the collector to perform data acquisition and synchronization, and synchronously uploading the acquired information. The present invention can realize multi-point measurement of the explosion, improve measurement accuracy, and realize synchronous acquisition of multi-point information, ensure the accuracy of the sampling information, improve the accuracy of the destructive capability assessment results of the explosive or warhead, and facilitate the precise use of the explosive or warhead.

Description

Technical Field

[0001] The present invention relates to the technical field of explosion signal acquisition, and in particular to a method and device for realizing multi-point signal acquisition at an explosion site. Background Art

[0002] Before using explosives or warheads, they must undergo extensive testing to obtain numerous performance parameters for designers to analyze and determine their destructive capabilities. However, existing test and measurement methods fall short of these requirements. Therefore, a method for multi-point signal acquisition at explosion sites, capable of improving measurement accuracy, is urgently needed. Summary of the Invention

[0003] Based on this, it is necessary to provide a method and device for implementing multi-point signal acquisition at an explosion site in order to address the above technical problems.

[0004] A method for implementing multi-point signal collection at an explosion site comprises the following steps: arranging collection points in a warhead or explosive drop zone array to form a measurement point array, and providing sensors corresponding to the collection points, the sensors being used to obtain collection information and transmit it to a collector; connecting the sensors to the corresponding collector, and connecting the collector to a signal synchronizer; configuring collection parameters of the collector, the collection parameters including sampling rate, sensor sensitivity, sampling time, and trigger time; connecting the detonating wire loop of the signal synchronizer to the warhead or explosive; when the detonating wire loop is broken, sending an on-off signal to start the signal synchronizer, triggering the collector to perform data collection and synchronization; and synchronously uploading the collection information via the signal synchronizer.

[0005] In one embodiment, the arrangement of collection points in the warhead or explosive landing area to form a measuring point matrix includes: setting a horizontal spacing and a vertical spacing between two measuring points in the warhead or explosive landing area matrix, and the corresponding measuring point matrix size is (m-1)(n-1)ab, wherein m and n are the number of horizontal measuring points and the number of vertical measuring points, respectively, and a and b are the horizontal spacing and the vertical spacing between two measuring points, respectively; if the warhead or explosive landing point is the center of the measuring point matrix, then there are four measuring points closest to the explosion epicenter, and compared with non-center landing points of the measuring point matrix, the overpressure value obtained by the measuring point at the center landing point is the minimum value, and the comparison distance is:

[0006]

[0007] Where w is the TNT equivalent at the explosion center, in kg. Estimate the shock wave pressure acting on the measuring point based on the air or ground explosion. In the case of an air explosion, the shock wave pressure is calculated as follows:

[0008]

[0009] Where ΔP m The unit is kg / cm 2 , and exists

[0010] When the explosion occurs on rigid ground, the calculation formula for the shock wave pressure value is:

[0011]

[0012] When the soil explodes on the ground, the calculation formula for the shock wave pressure value is:

[0013]

[0014] The shock wave pressure during positive and regular reflection is less than 3kg / cm 2 When , the reflected pressure is:

[0015]

[0016] When Mach reflection occurs, the reflected pressure is:

[0017] ΔP M =ΔP mG (1+cosφ0)

[0018] The peak value of the shock wave pressure is calculated based on the shock wave pressure value and the reflected pressure, and the voltage increment of the pressure analog signal is obtained in combination with the sensitivity value of the corresponding collector. The trigger voltage satisfies:

[0019] 2≥(V0+ΔV) / V r ≥1.5

[0020] Where ΔV is the voltage increment, V r is the trigger voltage, V0 is the baseline voltage of the collector; when the trigger voltage satisfies the above formula, it is determined that the setting of the measuring point array is reasonable; when the trigger voltage does not satisfy the above formula, the measuring point array and the horizontal and vertical spacing between two measuring points are reset until the requirements are met.

[0021] In one embodiment, the sensor obtains collected information and transmits it to the collector, including: connecting the sensor to the collector through a cable and a signal interface; obtaining a sampling value through the sensor, and outputting the sampling signal value to the collector; low-pass filtering the sampling signal to determine whether the sensor is in an open circuit or short circuit state; when the sensor is in an open circuit state, isolating the filtered sampling signal to obtain a valid signal; passing the valid signal through an attenuation circuit, an amplification circuit, a third-order filtering circuit and a differential conversion circuit in sequence to obtain and store the collected information.

[0022] In one embodiment, the trigger modes of the collector include internal triggering, external triggering, and internal and external combined triggering.

[0023] A device for implementing multi-point signal acquisition at an explosion site, used to implement the above-mentioned method for implementing multi-point signal acquisition at an explosion site, comprising: a multi-channel acquisition system, a signal synchronizer and a host computer; the multi-channel acquisition system includes multiple collectors and multiple sensors, the multiple collectors are all communicatively connected to the signal synchronizer, and the multiple sensors are respectively connected to the collectors; the signal synchronizer is connected to the explosive or warhead through a detonating wire loop; the host computer is communicatively connected to the signal synchronizer and the multi-channel acquisition system, and is used to configure parameters of the multi-channel acquisition system and the signal synchronizer; the multiple sensors acquire acquisition information and transmit it to the collector periodically or in real time, and after the explosive or warhead explodes, the collector is triggered to perform data acquisition and synchronization, the signal synchronizer obtains the acquisition information, and transmits the acquisition information to the host computer.

[0024] In one embodiment, the collector includes: a first end cover locking screw, a first upper end cover, a first sealing strip, a first PCB assembly, a first battery end cover, a first battery module, a first shell assembly, a first PCB assembly screw, a first battery end cover locking screw, a first shock-absorbing pad and a first shock-absorbing pad locking screw; the first upper end cover cooperates with the first shell assembly to form a sealing structure for sequentially installing the first sealing strip, the first PCB assembly, the first battery end cover and the first battery module from top to bottom; the first sealing strip is used to seal the first upper end cover and the first shell assembly; the first PCB assembly includes collection, flow regulation, analysis, WIFI and Ethernet communication modules; the first battery end cover is used to compress and protect the first battery module; the first battery module is used to power the collector; the first PCB assembly locking screw is used to lock the first PCB assembly and provide grounding protection; the first battery end cover locking screw is used to lock the first battery end cover; the first shock-absorbing pad is arranged at the bottom of the first shell assembly for shock absorption.

[0025] In one embodiment, the front panel of the first shell assembly is provided with a first power charging port, a first status indicator light, a first power switch button, a synchronization trigger line interface, an antenna interface, a USB transmission interface, an Ethernet transmission interface and a signal interface; the synchronization trigger line interface is used to connect the signal synchronizer via a cable; the antenna interface is used to install the antenna, and data transmission, system configuration and data recovery are performed through the antenna; the Ethernet transmission interface is used to connect to the host computer for data transmission, system configuration and data recovery; the signal interface is used to connect the sensor by cable.

[0026] In one embodiment, the signal synchronizer includes: a second end cover locking screw, a second upper end cover, a second sealing strip, a second PCB assembly, a second battery end cover, a second battery module, a second shell assembly, a second PCB assembly screw, a second battery end cover locking screw, a second shock-absorbing pad and a second shock-absorbing pad locking screw; the second upper end cover cooperates with the second shell assembly to form a sealing structure for installing the second sealing strip, the second PCB assembly, the second battery end cover and the second battery module in sequence from top to bottom; the second sealing strip is used to seal the second upper end cover and the second shell assembly; the second PCB assembly includes the synchronous trigger circuit of the collector; the second battery end cover is used to compress and protect the second battery module; the second battery module is used to power the signal synchronizer; the second PCB assembly locking screw is used to lock the second PCB assembly and ground protection; the second battery end cover locking screw is used to lock the second battery end cover; the second shock-absorbing pad is arranged at the bottom of the second shell assembly for shock absorption.

[0027] In one embodiment, the front panel of the second shell assembly is provided with a second power charging port, a second status indicator light, a second power switch button, a detonating wire interface and multiple synchronous trigger wire interfaces; the detonating wire interface is a two-core interface, connected to the detonating wire loop; the multiple synchronous trigger interfaces are respectively connected to the collector.

[0028] Compared with the existing technology, the advantages and beneficial effects of the present invention are: by arranging measurement point simulations in the warhead or explosive landing area, and correspondingly setting sensors to obtain collected information; connecting the sensors and the collector, and connecting the collector to the information synchronizer; configuring the collection parameters of the collector, including sampling rate, sensor sensitivity, sampling time and trigger time; connecting the detonating wire loop of the signal synchronizer to the warhead or explosive; when the detonating wire loop is broken, an on-off signal is sent to start the signal synchronizer, triggering the collector to perform data collection and synchronization, and uploading the collected information synchronously, thereby realizing multi-point measurement of the explosion, improving measurement accuracy, and being able to realize synchronous acquisition of multi-point information, ensuring the accuracy of the sampling information, thereby improving the accuracy of the destructive capability assessment results of the explosive or warhead, and facilitating the precise use of the explosive or warhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 1 is a flow chart of a method for implementing multi-point signal acquisition at an explosion scene in one embodiment;

[0030] Figure 2 Schematic diagram of a device for implementing multi-point signal acquisition at an explosion scene in one embodiment;

[0031] Figure 3 A schematic diagram of the connection of a device for implementing multi-point signal acquisition at an explosion scene in one embodiment;

[0032] Figure 4 for Figure 3 Schematic diagram of the structure of the collector;

[0033] Figure 5 for Figure 4 Schematic diagram of the structure of the front end of the collector;

[0034] Figure 6 for Figure 3 Schematic diagram of the structure of the signal synchronizer;

[0035] Figure 7 for Figure 6 Schematic diagram of the structure of the front end of the signal synchronizer. DETAILED DESCRIPTION

[0036] 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 through specific embodiments in conjunction with the accompanying drawings. 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.

[0037] In one embodiment, Figure 1 As shown, a method for implementing multi-point signal acquisition at an explosion site is provided, comprising the following steps:

[0038] Step S101: Arrange collection points in the warhead or explosive drop area to form a measurement point matrix, and set sensors at the collection points. The sensors are used to obtain collection information and transmit it to the collector.

[0039] Specifically, in order to calculate the explosion of a warhead or explosive, for example, signal collection points are arranged in the array of the warhead or explosive landing area to form a measurement point array, and sensors are set up at the corresponding collection points. A collector can be connected to multiple sensors, and the information of the measurement points is comprehensively collected through multiple sensors to improve the accuracy of the measurement data and transmit it to the collector.

[0040] The steps for arranging the acquisition points are as follows: in the warhead or explosive impact area array, set the horizontal and vertical spacing between two measuring points. The corresponding measurement point array size is (m-1)(n-1)ab, where m and n are the number of horizontal and vertical measurement points, respectively, and a and b are the horizontal and vertical spacing between two measuring points, respectively. If the warhead or explosive impact point is at the center of the measurement point array, there are four measurement points closest to the explosion center. Compared with the non-center impact points of the measurement point array, the overpressure value obtained by the measurement point at the center impact point is the minimum value. The comparison distance is:

[0041]

[0042] Where w is the TNT equivalent at the explosion center, in kg. Calculate the shock wave pressure acting on the measuring point based on whether it is an aerial explosion or a ground explosion. In the case of an aerial explosion, the shock wave pressure is calculated as follows:

[0043]

[0044] Where ΔP m The unit is kg / cm 2 , and exists

[0045] When the explosion occurs on rigid ground, the calculation formula for the shock wave pressure value is:

[0046]

[0047] When the soil explodes on the ground, the calculation formula for the shock wave pressure value is:

[0048]

[0049] The shock wave pressure during positive and regular reflection is less than 3kg / cm 2 When , the reflected pressure is:

[0050]

[0051] When Mach reflection occurs, the reflected pressure is:

[0052] ΔP M =ΔP mG (1+cosφ0)

[0053] The peak pressure of the shock wave is calculated based on the reflected pressure and the shock wave pressure value, and the voltage increment of the pressure analog signal is obtained by combining the sensitivity value of the corresponding collector. The trigger voltage satisfies:

[0054] 2≥(V0+ΔV) / V r ≥1.5

[0055] Where ΔV is the voltage increment, V r is the trigger voltage, V0 is the baseline voltage of the collector;

[0056] When the trigger voltage satisfies the above formula, it is determined that the setting of the measuring point array is reasonable; when the trigger voltage does not satisfy the above formula, the measuring point array and the horizontal and vertical spacing between the two measuring points are reset until the requirements are met.

[0057] Specifically, when a warhead or explosive randomly explodes within a grid array, there is inevitably a sensor point closest to the detonation center. This sensor point will record the maximum overpressure value relative to all sensor points. If a warhead or explosive lands at the center of a grid within a grid array, there are four closest sensor points to that grid. Compared to non-center points, the overpressure value recorded by this sensor point is the minimum.

[0058] When the warhead or explosive explodes on the ground, due to the obstruction of the ground, the air shock wave does not propagate to the entire space, but only to half of the infinite space. There are corresponding differences when the explosion occurs on rigid ground and soil ground. The rigid ground can be cement ground, etc.

[0059] According to the different positions of the warhead or explosive, the peak value of the shock wave pressure is calculated, and the voltage increment of the pressure simulation signal is calculated in combination with the corresponding sensitivity value of the connected collector. According to the baseline voltage and voltage increment of the collector, the conditions that need to be met for the trigger voltage are obtained, and the arranged measuring point array is tested to see whether it meets the conditions. If it does, it is determined that the measuring point array meets the requirements; if the trigger voltage does not meet the conditions, the measuring point array and the horizontal and vertical spacing between the two measuring points are rearranged, or the trigger level value of the collector is reset until the conditions are met, thereby ensuring the accuracy of the measurement data and avoiding interference caused by errors in the arrangement of the measuring point array.

[0060] Step S102: Connect the sensor and the corresponding collector, and connect the collector to the signal synchronizer.

[0061] Specifically, after determining that the arranged measurement point array meets the requirements, the sensor is connected to the corresponding collector, and the collector is connected to the signal synchronizer, so that after the sensor measures the signal, it can be transmitted to the collector. The collector processes the signal to obtain the collected information and transmits it to the signal synchronizer.

[0062] Step S103: configuring acquisition parameters of the collector, which include sampling rate, sensor sensitivity, sampling time, and trigger time.

[0063] Specifically, configure the acquisition parameters of the collector, which include sampling rate, sensor sensitivity, sampling time and trigger time. After obtaining the collected information, the sensor transmits the information to the collector according to the sampling rate; sensor sensitivity refers to the ratio of the output change of the sensor to the input change under steady-state working conditions; sampling time is based on the time when the sensor collects information; trigger time is the time when the collector is triggered to synchronize data after the explosion of the explosive.

[0064] Step S104: Connect the detonating wire loop of the signal synchronizer to the warhead or explosive.

[0065] Specifically, the signal synchronizer is provided with a detonating wire circuit, which connects the warhead or explosive to the signal synchronizer, so that when the warhead or explosive explodes, the signal synchronizer can be started at the same time to obtain the collected information of the collector, so that the power of the explosion can be estimated based on the collected information.

[0066] Step S105: When the detonating wire loop is broken, an on-off signal is sent to start the signal synchronizer, triggering the collector to perform data collection and synchronization.

[0067] Specifically, after the site is arranged, the explosives explode, the detonating wire circuit is broken, and at the same time, an on-off signal is provided to start the signal synchronizer, triggering the collector to synchronously collect data, ensuring that the data during the explosion can be collected in real time, and the collected information is transmitted to the signal synchronizer to obtain real-time data of the explosion of the explosives or warhead.

[0068] The trigger modes of the collector include internal trigger, external trigger and internal and external combined trigger.

[0069] Specifically, the collector's triggering modes can be internal, external, or combined. Internal triggering involves any collector sampling at a certain frequency. When the sampled value reaches the sampler's set threshold, the collector is triggered to perform high-speed acquisition and transmit the acquired information to the signal synchronizer. External triggering involves the detonation of explosives, which sever the loop detection cable from the trigger to the explosive end. The trigger immediately outputs 24 high-level signals in parallel to all collectors. All signal collectors, through level edge detection, immediately trigger acquisition and storage. Combined internal and external triggering involves pulling up the IO connected to the trigger when any acquisition reaches the threshold. Upon detecting the high level, the trigger immediately pulls up all IP connection lines to each collector, triggering all collectors.

[0070] Step S106: synchronously upload the collected information through a signal synchronizer.

[0071] Specifically, after the signal synchronizer obtains the collected information, it will upload the collected information synchronously and process and analyze the collected information according to actual needs, so as to obtain the destructive capability of the explosion of the explosive or warhead, so as to facilitate the subsequent corresponding use of the explosive and warhead.

[0072] In this embodiment, measurement point simulations are formed by arranging in the warhead or explosive drop area, and corresponding sensors are set to obtain collected information; the sensors and collectors are connected, and the collectors are connected to the information synchronizer; the collection parameters of the collector are configured, including sampling rate, sensor sensitivity, sampling time and trigger time; the detonating wire loop of the signal synchronizer is connected to the warhead or explosive; when the detonating wire loop is broken, an on-off signal is sent to start the signal synchronizer, triggering the collector to perform data collection and synchronization, and uploading the collected information synchronously, thereby realizing multi-point measurement of the explosion, improving measurement accuracy, and being able to realize synchronous acquisition of multi-point information, ensuring the accuracy of the sampling information, thereby improving the accuracy of the destructive capability assessment results of the explosive or warhead, and facilitating the precise use of the explosive or warhead.

[0073] In one embodiment, the steps for the sensor to obtain collected information and transmit it to the collector are: connecting the sensor to the collector through a cable and a signal interface; obtaining a sampling value through the sensor and outputting the sampling signal value collector; low-pass filtering the sampling signal to determine whether the sensor is in an open circuit or short circuit state; when the sensor is in an open circuit state, isolating the filtered sampling signal to obtain a valid signal; passing the valid signal through an attenuation circuit, an amplification circuit, a third-order filtering circuit and a differential conversion circuit in sequence to obtain and store the collected information.

[0074] Specifically, the sensor is input into the collector through a cable and the signal input port of the collector. The integrated circuit of the collector outputs a precise analog signal to the current output chip through the SPI bus control chip, converting the high-precision voltage into a current signal, providing the sensor with a precise constant current. By controlling the output of the digital-to-analog converter and the input of the current output chip, the current source can be controlled.

[0075] Since the sensor output is a superposition of bias voltage and AC signal, the AC signal is the effective voltage output by the sensor. The DC component of the sensor output signal is extracted through a low-pass filter, and the open or short circuit status information of the sensor is obtained through a comparator; the sensor output signal is isolated to obtain a valid signal, and is transmitted to the differential analog-to-digital conversion chip after passing through the attenuation circuit, amplification circuit, third-order filtering circuit and differential conversion circuit in sequence. The integrated circuit obtains the sampling value of the sensor by controlling the differential analog-to-digital conversion chip, obtains sampling information, completes signal acquisition, and stores it in the memory card.

[0076] like Figure 2 and Figure 3As shown, a device 20 for implementing multi-point signal acquisition at an explosion site is provided, which is used to implement the above-mentioned method for implementing multi-point signal acquisition at an explosion site, including: a multi-channel acquisition system 21, a signal synchronizer 22 and a host computer 23; the multi-channel acquisition system 21 includes multiple collectors and multiple sensors, the multiple collectors are all communicatively connected to the signal synchronizer, and the multiple sensors are respectively connected to the collectors; the signal synchronizer 22 is connected to the explosive or warhead through a detonating wire loop; the host computer 23 is communicatively connected to the signal synchronizer 22 and the multi-channel acquisition system 21, and is used to configure parameters of the multi-channel acquisition system 21 and the signal synchronizer 22; the multiple sensors collect and obtain collection information and transmit it to the collector, and after the explosive or warhead explodes, the collector is triggered to collect and synchronize data, the signal synchronizer 22 obtains the collection information, and transmits the collection information to the host computer 23.

[0077] In this embodiment, multiple sensors collect signals from each measurement point and transmit them to a data collector. This data collector then communicates with a signal synchronizer 22 via wireless or wired cables to ensure synchronization of multi-channel signals. However, a single data collector can also be used for signal acquisition. Each data collector and signal synchronizer 22 are independently powered by batteries and have independent power switches. Furthermore, this device supports optional functions such as threshold-triggered acquisition, timed-triggered acquisition, and single-shot export of acquired data or simultaneous export of acquired data after multiple acquisitions, meeting the requirements of a wider range of working conditions.

[0078] The data collected by the sensor is processed, analyzed and stored by the collector. The host computer 23 can import the data to the local computer for display and analysis through the network cable, USB interface or WIFI after the collection is completed; the host computer 23 can use WIFI to configure the collector connected to the wireless AP online, and can also obtain the real-time status of the collector (such as sampling rate, number of sampling points, trigger mode, battery power, etc.); when there are multiple collectors for collection, the multi-channel collection system 21 needs to be connected to the signal synchronizer 22 at the same time to ensure the synchronization of the triggering of each signal, thereby improving the accuracy of the collected information.

[0079] In one embodiment, Figure 4As shown, the collector 30 includes: a first end cover locking screw 311, a first upper end cover 312, a first sealing strip 313, a first PCB assembly 314, a first battery end cover 315, a first battery module 316, a first housing assembly 317, a first PCB assembly screw 318, a first battery end cover locking screw 319, a first shock-absorbing pad 320, and a first shock-absorbing pad locking screw 321; the first upper end cover 312 cooperates with the first housing assembly 317 to form a sealing structure for sequentially installing the first sealing strip 313, the first PCB assembly 314, the first battery end cover 315, and the first battery module 316 from top to bottom; The first sealing strip 313 is used to seal the first upper end cover 312 and the first shell assembly 317; the first PCB assembly 314 includes acquisition, flow regulation, analysis, WIFI and Ethernet communication modules; the first battery end cover 315 is used to compress and protect the first battery module 316; the first battery module 316 is used to power the collector 30; the first PCB assembly locking screw 318 is used to lock the first PCB assembly 314 and provide grounding protection; the first battery end cover locking screw 319 is used to lock the first battery end cover 315; the first shock-absorbing pad 320 is arranged at the bottom of the first shell assembly 317 for shock absorption and facilitating equipment placement.

[0080] In one embodiment, Figure 5 As shown, the front panel of the first shell assembly 317 is provided with a first power charging port 331, a first status indicator light 332, a first power switch button 333, a synchronization trigger line interface 334, an antenna interface 335, a USB transmission interface 336, an Ethernet transmission interface 337 and a signal interface 338; the first power charging port 331 is used to charge the first battery module 316, and converts 220V AC power into DC power through an adapter; the first status indicator light 332 is used to display the power level, trigger mode, trigger status, and program writing and system debugging judgment; the synchronization trigger line interface 334 is used to connect the signal synchronizer via a cable; the antenna interface 335 is used to install the antenna, and perform data transmission, system configuration and data recovery through the antenna; the Ethernet transmission interface 337 is used to connect to the host computer for data transmission, system configuration and data recovery; the signal interface 338 is used to connect the sensor by cable.

[0081] In one embodiment, Figure 6As shown, the signal synchronizer 40 includes: a second end cover locking screw 411, a second upper end cover 412, a second sealing strip 413, a second PCB assembly 414, a second battery end cover 415, a second battery module 416, a second housing assembly 417, a second PCB assembly screw 418, a second battery end cover locking screw 419, a second shock-absorbing pad 420 and a second shock-absorbing pad locking screw 421; the second upper end cover 412 cooperates with the second housing assembly 417 to form a sealing structure for sequentially installing the second sealing strip 413, the second PCB assembly 414, the second battery end cover 415 and the second battery module 416 from top to bottom. Battery module 416; the second sealing strip 413 is used to seal the second upper end cover 412 and the second shell assembly 417; the second PCB assembly 414 includes a synchronous trigger circuit of the collector; the second battery end cover 415 is used to compress and protect the second battery module 416; the second battery module 416 is used to power the signal synchronizer; the second PCB assembly locking screw 418 is used to lock the second PCB assembly 414 and ground protection; the second battery end cover locking screw 419 is used to lock the second battery end cover 415; the second shock-absorbing pad 420 is arranged at the bottom of the second shell assembly 417 for shock absorption and facilitating equipment placement.

[0082] In one embodiment, Figure 7 As shown, the front panel of the second shell assembly 417 is provided with a second power charging port 431, a second status indicator light 432, a second power switch button 433, a detonating wire interface 434 and multiple synchronous trigger line interfaces 435; the second power charging port 431 is used to charge the first battery module 316, and converts 220V AC power into DC power through an adapter; the second status indicator light 432 is used to display the power level and trigger status; the detonating wire interface 434 is a two-core interface, which is connected to the detonating wire circuit. When the detonating wire circuit is broken, it provides an on-off signal to trigger the signal synchronizer; multiple synchronous trigger interfaces 435 are respectively connected to the collector to ensure synchronous triggering to start collection.

[0083] It should be noted that the interfaces and housings of the collector and signal synchronizer are all sealed to IP67 level, achieving waterproof and dustproof functions.

[0084] The above content is a further detailed description of the present invention in conjunction with specific embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A method for implementing multi-point signal acquisition at an explosion site, characterized in that: include: Arranging collection points in a warhead or explosive drop zone array to form a measurement point array, and providing sensors corresponding to the collection points, the sensors being used to acquire collection information and transmit it to a collector. Forming the measurement point array includes: setting a horizontal spacing and a vertical spacing between two measurement points in the warhead or explosive drop zone array, and the corresponding measurement point array size is (m-1)(n-1)ab, where m and n are the number of horizontal measurement points and the number of vertical measurement points, respectively, and a and b are the horizontal spacing and the vertical spacing between two measurement points, respectively; If the impact point of the warhead or explosive is the center of the measurement point array, there are four measurement points closest to the explosion center. Compared with the non-center impact points of the measurement point array, the overpressure value obtained by the measurement point when the center impact point is the smallest value. The comparison distance is: Where w is the TNT equivalent of the explosion center, in kg; Estimate the shock wave pressure value acting on the measuring point according to the air explosion or ground explosion; When an explosion occurs in the air, the calculation formula for the shock wave pressure value is: Where ΔP m The unit is kg / cm 2 , and exists When the explosion occurs on rigid ground, the calculation formula for the shock wave pressure value is: When the soil explodes on the ground, the calculation formula for the shock wave pressure value is: The shock wave pressure during positive and regular reflection is less than 3kg / cm 2 When , the reflected pressure is: When Mach reflection occurs, the reflected pressure is: ΔP M =ΔP mG (1+cosφ0) The peak value of the shock wave pressure is calculated based on the shock wave pressure value and the reflected pressure, and the voltage increment of the pressure analog signal is obtained in combination with the sensitivity value of the corresponding collector. The trigger voltage satisfies: 2≥(V0+ΔV) / V r ≥1.5 Where ΔV is the voltage increment, V r is the trigger voltage, V0 is the baseline voltage of the collector; When the trigger voltage satisfies the above formula, it is determined that the setting of the measurement point array is reasonable; When the trigger voltage does not satisfy the above formula, the measurement point matrix and the horizontal and vertical spacings between two measurement points are reset until the requirements are met; Connecting the sensor to a corresponding collector, and connecting the collector to a signal synchronizer; Configuring acquisition parameters of the collector, the acquisition parameters including sampling rate, sensor sensitivity, sampling time and trigger time; Connecting the detonating wire circuit of the signal synchronizer to the warhead or explosive; When the detonating wire loop is broken, an on-off signal is sent to start the signal synchronizer, triggering the collector to perform data collection and synchronization; The collected information is uploaded synchronously through the signal synchronizer.

2. The method for implementing multi-point signal acquisition at an explosion site according to claim 1, characterized in that: The sensor acquires the collected information and transmits it to the collector, including: Connecting the sensor to the collector via cables and signal interfaces; Acquire sampling values ​​through the sensor and output sampling signal values ​​to the collector; Performing low-pass filtering on the sampling signal to determine whether the sensor is in an open circuit or short circuit state; When the sensor is in an open circuit state, the filtered sampling signal is DC-isolated to obtain a valid signal; The effective signal is sequentially passed through an attenuation circuit, an amplification circuit, a third-order filtering circuit, and a differential conversion circuit to obtain collected information and store it.

3. The method for implementing multi-point signal acquisition at an explosion site according to claim 1, characterized in that: The trigger modes of the collector include internal trigger, external trigger and internal and external combined trigger.

4. A device for implementing multi-point signal acquisition at an explosion site, characterized in that: A method for implementing multi-point signal acquisition for an explosion scene as described in claims 1-3, comprising: Multi-channel acquisition system, signal synchronizer and host computer; The multi-channel acquisition system includes multiple collectors and multiple sensors, the multiple collectors are all communicatively connected to the signal synchronizer, and the multiple sensors are respectively connected to the collectors; The signal synchronizer is connected to the explosive or warhead via a detonating wire loop; The host computer is in communication with the signal synchronizer and the multi-channel acquisition system, and is used to configure parameters of the multi-channel acquisition system and the signal synchronizer; The multiple sensors collect collected information and transmit it to the collector periodically or in real time. After the explosives or warheads explode, the collector is triggered to collect and synchronize data. The signal synchronizer obtains the collected information and transmits it to the host computer.

5. The device for realizing multi-point signal acquisition at an explosion site according to claim 4, characterized in that: The collector includes: First end cover locking screw, first upper end cover, first sealing strip, first PCB assembly, first battery end cover, first battery module, first housing assembly, first PCB assembly screw, first battery end cover locking screw, first shock-absorbing pad and first shock-absorbing pad locking screw; The first upper end cover cooperates with the first housing assembly to form a sealing structure for sequentially installing the first sealing strip, the first PCB assembly, the first battery end cover, and the first battery module from top to bottom; The first sealing strip is used to seal the first upper end cover and the first shell assembly; The first PCB assembly includes acquisition, flow regulation, analysis, WIFI and Ethernet communication modules; The first battery end cover is used to compress and protect the first battery module; The first battery module is used to power the collector; The first PCB assembly locking screw is used to lock the first PCB assembly and provide grounding protection; The first battery end cover locking screw is used to lock the first battery end cover; The first shock-absorbing pad is arranged at the bottom of the first shell assembly for shock absorption.

6. The device for implementing multi-point signal acquisition at an explosion site according to claim 5, characterized in that: The front panel of the first housing assembly is provided with a first power charging port, a first status indicator light, a first power switch button, a synchronization trigger line interface, an antenna interface, a USB transmission interface, an Ethernet transmission interface and a signal interface; The synchronization trigger line interface is used to connect the signal synchronizer via a cable; The antenna interface is used to install an antenna, through which data transmission, system configuration and data recovery are performed; The Ethernet transmission interface is used to connect to the host computer for data transmission, system configuration and data recovery; The signal interface is used to connect the sensor in a cable manner.

7. The device for implementing multi-point signal acquisition at an explosion site according to claim 4, characterized in that: The signal synchronizer comprises: Second end cover locking screws, second upper end cover, second sealing strip, second PCB assembly, second battery end cover, second battery module, second housing assembly, second PCB assembly screws, second battery end cover locking screws, second shock-absorbing pad and second shock-absorbing pad locking screws; The second upper end cover cooperates with the second housing assembly to form a sealing structure for sequentially mounting the second sealing strip, the second PCB assembly, the second battery end cover, and the second battery module from top to bottom; The second sealing strip is used to seal the second upper end cover and the second shell assembly; The second PCB assembly includes a synchronous trigger circuit of the collector; The second battery end cover is used to compress and protect the second battery module; The second battery module is used to supply power to the signal synchronizer; The second PCB assembly locking screw is used to lock the second PCB assembly and provide grounding protection; The second battery end cover locking screw is used to lock the second battery end cover; The second shock-absorbing pad is arranged at the bottom of the second shell assembly for shock absorption.

8. The device for implementing multi-point signal acquisition at an explosion site according to claim 7, characterized in that: The front panel of the second housing assembly is provided with a second power charging port, a second status indicator light, a second power switch button, a detonating wire interface and a plurality of synchronous trigger wire interfaces; The detonating wire interface is a two-core interface, which is connected to the detonating wire loop; The multiple synchronization trigger line interfaces are connected to the collectors respectively.

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