Explosion field shock wave overpressure measurement system and method

Abstract

This invention belongs to the field of explosion field shock wave measurement, and relates to an explosion field shock wave overpressure measurement system and method. The technical solution includes a control platform and multiple sensor nodes. The control platform includes a first Beidou timing module and a wired and / or wireless communication module. The sensor nodes include a second Beidou timing module, a wired and / or wireless communication module, a flash memory, and a battery. The second Beidou timing module is configured to receive satellite time. The sensor nodes obtain information from the control platform or navigation satellites to synchronize the sensor node's time with the satellite time and upload the collected explosion shock wave intensity information to the control platform. Each sensor node communicates with the control platform via wired and / or wireless communication modules. The sensor nodes can also store the collected data through flash memory, which is adaptable to various environments and achieves the purpose of local data storage and rapid data transmission.

Description

Technical Field

[0001] This invention belongs to the field of overpressure measurement of shock waves in explosion fields, and relates to a system and method for measuring overpressure of shock waves in explosion fields. Background Technology

[0002] Overpressure testing of blast field shock waves is an important method for studying the destructive effectiveness of munitions. To closely simulate actual damage environments, evaluation is necessary through the construction of large buildings or multiple saturation attack simulation tests.

[0003] Current technology allows for the synchronous acquisition and transmission of signals from multiple sensors using multi-channel acquisition boards. In this approach, the sensors are connected to the multi-channel acquisition system via leads; however, the length of these leads limits wiring options and leads to significant sensor signal interference.

[0004] Alternatively, a distributed acquisition system can be used to synchronize time via BeiDou / GPS. However, this is only suitable for open spaces. If there are buildings or other obstructions, the time of each sensor may not be synchronized, which will have a significant impact on the test results. Moreover, it cannot be used for remote monitoring and control.

[0005] The two methods mentioned above cannot meet the goal of rapid data feedback and immediate evaluation of experimental results. Summary of the Invention

[0006] To overcome the shortcomings of the aforementioned related technologies, this invention provides an explosion field shock wave overpressure measurement system. This system is adaptable to various environments and can achieve time synchronization of all sensors.

[0007] The aforementioned explosion field shock wave overpressure measurement system includes: a control platform, multiple sensor nodes, and at least one correction node. The control platform includes a first BeiDou time synchronization module configured to receive satellite time, and the control platform is connected to a higher-level server.

[0008] Each sensor node is signal-connected to the control platform. The sensor node is configured to collect the intensity of the explosion shock wave at its location. The sensor node includes a second Beidou time synchronization module, which is configured to receive satellite time. The sensor node obtains information from the control platform or navigation satellite to synchronize the time of the sensor node with the satellite time and uploads the collected explosion shock wave intensity information to the control platform.

[0009] The correction node is signal-connected to the control platform. The correction node includes a third BeiDou time synchronization module, which is configured to receive satellite time. The correction node obtains a first satellite time from the control platform and a second satellite time from the navigation satellite, and compares the first and second satellite times to obtain correction parameters.

[0010] Preferably, the sensor node further includes: at least one piezoelectric sensor, a communication module, and a main controller, wherein the at least one piezoelectric sensor is configured to acquire the intensity of the blast shock wave at its location. The communication module is signal-connected to the control platform. The main controller is electrically connected to the second satellite communication module, the at least one piezoelectric sensor, and the communication module.

[0011] Preferably, the sensor node further includes a housing. The at least one piezoelectric sensor is embedded in the housing, and the sensing surface of the piezoelectric sensor faces outward.

[0012] Alternatively, the at least one piezoelectric sensor may be disposed on the outside of the housing, and the information line of the at least one piezoelectric sensor may pass through the housing and be electrically connected to the main controller.

[0013] Preferably, the main controller includes: a piezoelectric information processing circuit, an FPGA, and a flash memory. The piezoelectric information processing circuit is electrically connected to the at least one piezoelectric sensor. The FPGA is electrically connected to the piezoelectric information processing circuit. The flash memory is electrically connected to the FPGA.

[0014] Preferably, the communication module includes a wired communication module and a wireless communication module. The port of the wired communication module is embedded in the housing, and the wired communication module is electrically connected to the FPGA. The wireless communication module is disposed within the housing, and the wireless communication module is electrically connected to the FPGA.

[0015] Preferably, the sensor node further includes a digital isolator, and the wired communication module, the wireless communication module, and the second satellite communication module are all electrically connected to the FPGA through the digital isolator.

[0016] Preferably, the control platform further includes: a microprocessor, a first wireless communication module, a first wired communication module, and a network data communication module. The first wireless communication module is electrically connected to the microprocessor and wirelessly communicates with the second wireless communication module. The first wired communication module is electrically connected to the microprocessor and electrically connected to the second wired communication module. The network data communication module is electrically connected to the microprocessor and signal-connected to the upstream server.

[0017] On the other hand, the present invention also provides a method for measuring the overpressure of shock waves in an explosion field, applicable to the explosion field shock wave overpressure measurement system described in any of the above embodiments.

[0018] The method for measuring the overpressure of the blast shock wave includes: arranging multiple sensor nodes at locations corresponding to the points where the intensity of the blast shock wave needs to be collected; activating the sensor nodes and determining whether they can acquire satellite information to synchronize their time with satellite time; if so, activating the control platform to enable communication between the sensor nodes and the control platform; if not, activating the control platform, acquiring satellite information, synchronizing the control platform's time with the satellite time, communicating with the sensor nodes, and sending the control platform's time information to the sensor nodes; simultaneously activating a correction node when activating the control platform, acquiring satellite information and generating a first satellite time, and receiving the control platform's time information and generating a second satellite time; comparing the first and second satellite times, using the difference as a correction parameter, and correcting the time information received by the sensor nodes according to the correction parameter; and conducting an experiment where the sensor nodes collect blast shock wave intensity information at the corresponding locations.

[0019] Preferably, the sensor node includes a flash memory with dual chip select functionality. After the sensor node acquires the intensity information of the explosion shock wave at the corresponding location, the explosion field shock wave overpressure measurement method further includes the sensor node recording the acquired information into the flash memory.

[0020] The method for the sensor node to record the collected information into the flash memory includes: dividing the flash memory into multiple storage partitions, each storage partition including a first partition and a second partition, the first block of the first partition being configured as a parameter area, the first block of the second partition being configured as an information recording area, and the other positions of the first partition and the second partition being configured as negative delay cyclic acquisition areas.

[0021] The parameter area includes: the trigger threshold for the intensity of the explosion shock wave, the single / continuous working mode of the explosion experiment, the negative delay time, and the total calibration coefficient.

[0022] The information recording area includes: the storage location of the explosion shock wave intensity information after triggering the threshold, the stop recording location, and the BeiDou / GPS timing time corresponding to the explosion shock wave intensity information after triggering the threshold.

[0023] The sensor node writes the collected information into the first page of the first area of ​​the negative delay cyclic acquisition area.

[0024] The flash memory performs block erasure on the first page of the second area in the negative delay cyclic acquisition area, while the sensor node continues to write information into the block area after the information has been written in the first area of ​​the negative delay cyclic acquisition area.

[0025] The flash memory writes information to the area where the first page of the second region in the negative delay cyclic acquisition area has been erased, and at the same time, the flash memory erases the block area after the information written in the first region in the negative delay cyclic acquisition area.

[0026] This process continues until the last block of the current storage partition is reached, at which point a new storage partition is started.

[0027] Preferably, after the sensor node records the collected information into the flash memory, the explosion field shock wave overpressure measurement method further includes the control platform acquiring information from the sensor node.

[0028] The method by which the control platform obtains information from the sensor nodes includes: the control platform receiving a control signal from a higher-level server and sending a one-way command to the corresponding sensor node. The sensor node then uploads the corresponding information from the flash memory to the control platform according to the one-way command.

[0029] The beneficial effects of this invention are as follows:

[0030] Both the control platform and sensor nodes of this invention are equipped with BeiDou time synchronization modules. The sensor nodes can obtain satellite time synchronization from navigation satellites, from the control platform, or from the network time of an upstream server via the control platform. This allows the sensor nodes to synchronize with satellite time without being affected by environmental interference or constraints.

[0031] The flash memory of this invention employs a first region and a second region, enabling simultaneous storage and erasure operations, thus improving storage speed. Furthermore, its division into multiple storage partitions can accommodate the need for continuous, multiple acquisitions of explosion shock wave intensity signals.

[0032] This invention employs a method where the control platform issues one-way commands to the sensor nodes, and the sensor nodes upload data according to the one-way commands. This can prevent problems such as control platform crashes or data loss caused by multiple sensor nodes uploading signals out of order, and facilitates subsequent data processing and collection. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a first structural diagram of the explosion field shock wave overpressure measurement system described in this invention.

[0035] Figure 2 This is a circuit diagram of the sensor node in this invention.

[0036] Figure 3 This is a diagram showing the location of the sensor node of the present invention in measuring the shock wave of the explosion field;

[0037] Figure 4 This is a second structural diagram of the explosion field shock wave overpressure measurement system described in this invention;

[0038] Figure 5 This is a third structural diagram of the explosion field shock wave overpressure measurement system described in this invention;

[0039] Figure 6 This is a fourth structural diagram of the explosion field shock wave overpressure measurement system described in this invention;

[0040] Figure 7 This is the fifth structural diagram of the explosion field shock wave overpressure measurement system described in this invention;

[0041] Figure 8 This is the sixth structural diagram of the explosion field shock wave overpressure measurement system described in this invention;

[0042] Figure 9 This is a flowchart of the explosion field shock wave overpressure measurement method of the present invention. Detailed Implementation

[0043] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0046] In current technology, the intensity of the shock wave in an explosion field can be measured by collecting gas pressure information at key points using an array of pressure sensors placed near the explosion field.

[0047] By collecting gas pressure signals through a pressure sensor array, the intensity of the explosion shock wave at the location where the pressure sensor is placed can be determined. Furthermore, by using the time points of signal acquisition by each pressure sensor in the pressure sensor array, the shock wave field of the explosion field can be reconstructed, and thus the shock wave intensity and velocity at the corresponding location can be determined.

[0048] Another method for measuring the intensity of the shock wave in an explosion field is through schlieren imaging. This method uses a high-speed photography system to capture images, which can clearly obtain the influence of the entire shock wave field.

[0049] However, for special locations, such as indoor buildings, the schlieren imaging method is not suitable due to the obstruction of the building, and the pressure sensor array also suffers from time asynchrony among the sensors, which makes it impossible to reconstruct the shock wave field.

[0050] Based on this, on the one hand, such as Figures 1 to 9 As shown, some embodiments of the present invention provide an explosion field shock wave overpressure measurement system. The explosion field shock wave overpressure measurement system includes: a control platform 1 and multiple sensor nodes 2. The control platform 1 includes a first BeiDou timing module, which is configured to receive satellite time. The control platform 1 is signal-connected to a higher-level server 3.

[0051] Each sensor node 2 is signal-connected to the control platform 1. The sensor node 2 is configured to collect the intensity of the explosion shock wave at its location. The sensor node 2 includes a second Beidou time synchronization module 14, which is configured to receive satellite time. The sensor node 2 obtains information from the control platform 1 or navigation satellites to synchronize the time of the sensor node 2 with the satellite time and uploads the collected explosion shock wave intensity information to the control platform 1.

[0052] In some examples, such as Figure 1 and Figure 2 As shown, multiple sensor nodes 2 can be arranged according to the location of the shock wave in the explosion field at key locations or locations that need to be measured. Each sensor node 2 includes a second Beidou timing module, that is, each sensor node 2 can synchronize its time with the satellite through the second Beidou timing module.

[0053] Or, such as Figure 4 As shown, when all or some of the multiple sensor nodes 2 are located indoors or in other special locations, there may be a situation where they cannot receive BeiDou satellite signals, meaning that some or all of the sensor nodes 2 cannot achieve time synchronization with the satellite. In this embodiment, the control platform includes a first BeiDou timing module. The control platform can be set in a relatively spacious location, ensuring that the control platform can receive BeiDou satellite signals and that the control platform's time is synchronized with the satellite time. The control platform achieves time synchronization between each sensor node 2 and the satellite by communicating with each sensor node 2.

[0054] Or, such as Figure 5 As shown, the control platform communicates with the upper-level server via network. The upper-level server can be a computer. A router is set up between the control platform and the upper-level server. The control platform and the router are connected via network cable, and the upper-level server and the router are connected via network cable.

[0055] The control platform can obtain the network time from the upper-level server and send the network time to each sensor node 2, thereby synchronizing each sensor node 2 with the network time.

[0056] In this embodiment, the sensor nodes can synchronize their time with satellite time or network time in three ways, so that when the sensor nodes collect the pressure signal of the shock wave, they can also know the time when the shock wave passed through that location. In this way, the shock wave field can be reconstructed by using the positions and time points of multiple sensor nodes.

[0057] In some embodiments, such as Figures 6 to 8As shown, the explosion field shock wave overpressure measurement system also includes a correction node 4. The correction node 4 is signal-connected to the control platform 1. The correction node 4 includes a third BeiDou time synchronization module, which is configured to receive satellite time. The correction node 4 obtains a first satellite time from the control platform 1 and a second satellite time from the navigation satellite, and compares the first and second satellite times to obtain correction parameters.

[0058] In some examples, such as Figure 6 As shown, sensor node 2 is positioned in a relatively good location and can communicate directly with navigation satellite 5. That is, sensor node 2 can obtain time signals through navigation satellite and achieve time synchronization with satellite. Therefore, correction node 4 can be in a dormant or non-working state.

[0059] In other examples, such as Figure 7 As shown, the control platform receives BeiDou satellite signals from navigation satellite 5 to synchronize its time with the satellite time. The control platform sends time information to multiple sensor nodes, which receive the time information and generate the satellite time. Since the satellite time of the sensor nodes undergoes data processing and transmission between the control platform and the sensor nodes, there may be errors between the sensor nodes' satellite time and the actual satellite time.

[0060] Therefore, the overpressure measurement system for the shock wave in the explosion field also includes a correction node 4, such as... Figure 7 As shown, sensor node 2 failed to communicate with navigation satellite 5, while control platform 1 could communicate with navigation satellite 5 and synchronize with its time. Control platform 1 sends time information to each sensor node 2, and each sensor node 2 generates its own satellite time based on the control platform's time information. A correction node can be located on the control platform side, ensuring that correction node 4 can communicate normally with the navigation satellite. The correction node can communicate with the navigation satellite and generate a second satellite time based on its signal; it can also communicate with control platform 1 and, together with sensor nodes 2, acquire the control platform 1's time information. Correction node 4 generates a first satellite time based on the control platform 1's time information. Here, the first satellite time can be considered consistent with or substantially consistent with the satellite time generated by each sensor node 2 based on the control platform's time information. By comparing the first and second satellite times, it can be determined whether there is an error in the satellite time of each sensor node 2; and based on the difference between the first and second satellite times, the satellite time of each sensor node 2 can be corrected.

[0061] In some other examples, the correction node 4 can be one, two, or four, and the difference between the first and second satellite times of each correction node is the correction parameter. When there are multiple correction nodes, each correction node has its own correction parameter, and the average of multiple correction parameters can be used as the basis for correcting the satellite time formed by the time information received by the sensor node from the control platform.

[0062] In some examples, such as Figure 8 As shown, the control platform can receive the network time from the upper-level server and distribute the network time information to each sensor node. Each sensor node then generates its own network time based on this information. Correction node 4 can communicate with navigation satellites and generate a second satellite time. Simultaneously, correction node 4 receives the network time information from the control platform and generates a corrected network time. By comparing the corrected network time with the second satellite time, it can be determined whether there are errors in the satellite time of each sensor node 2. Furthermore, based on the difference between the corrected network time and the second satellite time, the satellite time of each sensor node 2 can be corrected.

[0063] In some embodiments, such as Figure 3 As shown, the sensor node 2 further includes: at least one piezoelectric sensor 11, a communication module 12, and a main controller 13, wherein the at least one piezoelectric sensor 11 is configured to acquire the intensity of the explosion shock wave at its location. The communication module 12 is signal-connected to the control platform 1. The main controller 13 is electrically connected to the second satellite communication module 12, the at least one piezoelectric sensor 11, and the communication module 12.

[0064] In some examples, each sensor node 2 may include one piezoelectric sensor 11, two piezoelectric sensors 11, or three piezoelectric sensors 12. The multiple piezoelectric sensors of each sensor node 2 can be installed in different positions and facing different directions according to actual needs to ensure that the measured impact intensity of the shock wave is more accurate.

[0065] In some embodiments, the sensor node 2 further includes a housing. The at least one piezoelectric sensor 11 is embedded in the housing, with the acquisition surface of the piezoelectric sensor 11 facing outwards, wherein the communication module 12 and the main controller 13 are fixed inside the housing.

[0066] For example, the housing of the sensor node can be a polycarbonate or metal housing to accommodate the impact force of the shock wave. One or more piezoelectric sensors can be disposed on the surface of the housing, for example, embedded in the housing, with the signal-collecting surface of the piezoelectric sensor facing outward from the housing.

[0067] In other embodiments, the sensor node 2 further includes a housing. The at least one piezoelectric sensor 11 is disposed on the outside of the housing, and the information line of the at least one piezoelectric sensor 11 passes through the housing and is electrically connected to the main controller 13.

[0068] For example, one or more piezoelectric sensors may be disposed on the outside of the housing, and the signal lines of the piezoelectric sensors pass through the housing and are electrically connected to the main controller inside.

[0069] In some embodiments, such as Figure 3 As shown, the main controller 13 includes a piezoelectric information processing circuit 131, an FPGA 132, and a flash memory 133. The piezoelectric information processing circuit 131 is electrically connected to the at least one piezoelectric sensor 11. The FPGA 132 is electrically connected to the piezoelectric information processing circuit 131. The flash memory 133 is electrically connected to the FPGA 132.

[0070] In some examples, the signal collected by the piezoelectric sensor is uploaded to the main controller. It can be understood that the signal uploaded by the piezoelectric sensor is an analog signal. In order to facilitate the main controller to receive and process the signal, it is necessary to filter and convert the signal uploaded by the piezoelectric sensor to analog-to-digital. In other words, the piezoelectric information processing circuit can include a filtering circuit and an analog-to-digital conversion circuit.

[0071] The main controller also needs a microprocessor to receive the digital signals uploaded by the piezoelectric information processing circuit. The microprocessor can be an FPGA, which can meet the requirements of fast data storage and different critical points of the shock wave on site (facilitating rapid on-site editing).

[0072] It should be added that after the main controller receives the satellite time signal or the network time signal, and after the sensor node synchronizes with the satellite time or the network time, the FPGA needs to ensure that the specific time for the sensor node to collect the shock wave intensity signal is relatively accurate through timing. Therefore, in this application, the FPGA needs to include a clock management unit.

[0073] The main controller also includes a flash memory 133, which can be electrically connected to the FPGA. The flash memory enables the sensor nodes to store the collected shock wave field information. Because shock waves travel at high speeds, multiple sensor nodes may simultaneously or within a very short period of time collect shock wave field information. If all sensor nodes upload the information immediately after collection, the control platform may crash or lose data due to excessive data volume. In this application, the sensor nodes can store information, and in conjunction with the FPGA, rapid data processing and storage can be achieved, enabling the sensor nodes to collect information from multiple consecutive shock wave fields.

[0074] In some embodiments, the communication module 12 includes a wired communication module and a wireless communication module. The port of the wired communication module is embedded in the housing, and the wired communication module is electrically connected to the FPGA 132. The wireless communication module is disposed within the housing, and the wireless communication module is electrically connected to the FPGA 132.

[0075] In some examples, each sensor node can be wired to the main control platform; that is, the communication module of each sensor node can include a wired communication module. One type of wired communication module is an RS485 communication module.

[0076] Each sensor node can wirelessly connect to the main control platform; that is, each sensor node's communication module can include a wireless communication module. This wireless communication module can be a Bluetooth module, a WiFi module, or a 4G communication module.

[0077] In this application, each sensor node can achieve wired and / or wireless communication with the main control platform. Therefore, even if the wired connection between the sensor node and the main control platform is interrupted due to the explosion shock wave, data can still be uploaded wirelessly. Alternatively, if the wireless module of the sensor node is damaged or the wireless signal is interfered with due to the explosion shock wave, data can still be uploaded between the sensor node and the main control platform via wired communication.

[0078] In this application, the electrical connection between the RS485 communication module, Bluetooth module, WiFi module or 4G communication module and the FPGA is prior art, and the specific wiring method will not be described in detail here.

[0079] In some embodiments, the sensor node 2 further includes a digital isolator, through which the wired communication module, the wireless communication module, and the second satellite communication module 12 are all electrically connected to the FPGA 132.

[0080] Preferably, the control platform 1 further includes: a microprocessor, a first wireless communication module, a first wired communication module, and a network data communication module. The first wireless communication module is electrically connected to the microprocessor and wirelessly communicates with the second wireless communication module. The first wired communication module is electrically connected to the microprocessor and electrically connected to the second wired communication module. The network data communication module is electrically connected to the microprocessor and signal-connected to the upper-level server 3.

[0081] It is understood that the control platform 1 is electrically connected to each sensor node. Therefore, the control platform has a first wireless communication module and a first wired communication module corresponding to each sensor node. The first wireless communication module can be a Bluetooth module, WiFi module or 4G communication module corresponding to the sensor node, and the first wired communication module can be an RS485 communication module.

[0082] The network data communication module facilitates communication between the control platform and the upper-level server. For example, the upper-level server can send instructions, signals and other information to the main control platform, or the control platform can upload information to the upper-level server.

[0083] The microprocessor can be a single-chip microcomputer, which is electrically connected to the first wireless communication module, the first wired communication module, and the network data communication module.

[0084] It should be added that, in order to ensure that the second satellite time formed by the correction node is consistent with or substantially consistent with the satellite time formed by the time information received by the sensor node, the internal circuit of the correction node is completely identical to that of the sensor node, except for the lack of a piezoelectric sensor.

[0085] On the other hand, the present invention also provides a method for measuring the overpressure of shock waves in an explosion field, applicable to the explosion field shock wave overpressure measurement system described in any of the above embodiments.

[0086] like Figure 9 As shown, the method for measuring the overpressure of the shock wave in the explosion field includes:

[0087] S1. Arrange multiple sensor nodes at the corresponding locations where the intensity of the explosion shock wave needs to be collected.

[0088] S2. Start the sensor node, determine whether the sensor node can acquire satellite information, and synchronize the time of the sensor node with the satellite time.

[0089] S3. If possible, start the control platform to enable communication between the sensor nodes and the control platform.

[0090] S4. If not, the control platform is started. The control platform acquires satellite information and synchronizes its time with the satellite time. The control platform communicates with the sensor node and sends its time information to the sensor node.

[0091] S5. When starting the control platform, the correction node is started simultaneously. The correction node acquires satellite information and generates the first satellite time, and the correction node receives the time information from the control platform and generates the second satellite time.

[0092] S6. The correction node compares the first satellite time with the second satellite time, and the difference between the first satellite time and the second satellite time is the correction parameter. The time information received by the sensor node is corrected according to the correction parameter.

[0093] S57. Conduct the experiment, whereby the sensor node collects information on the intensity of the explosion shock wave at the corresponding location.

[0094] Preferably, the sensor node includes a flash memory with dual chip select functionality. After the sensor node acquires the intensity information of the explosion shock wave at the corresponding location, the explosion field shock wave overpressure measurement method further includes the sensor node recording the acquired information into the flash memory.

[0095] The method for the sensor node to record the collected information into the flash memory includes: dividing the flash memory into multiple storage partitions, each storage partition including a first partition and a second partition, the first block of the first partition being configured as a parameter area, the first block of the second partition being configured as an information recording area, and the other positions of the first partition and the second partition being configured as negative delay cyclic acquisition areas.

[0096] The parameter area includes: the trigger threshold for the intensity of the explosion shock wave, the single / continuous working mode of the explosion experiment, the negative delay time, and the total calibration coefficient.

[0097] The information recording area includes: the storage location of the explosion shock wave intensity information after triggering the threshold, the stop recording location, and the BeiDou / GPS timing time corresponding to the explosion shock wave intensity information after triggering the threshold.

[0098] The sensor node writes the collected information into the first page of the first area of ​​the negative delay cyclic acquisition area.

[0099] The flash memory performs block erasure on the first page of the second area in the negative delay cyclic acquisition area, while the sensor node continues to write information into the block area after the information has been written in the first area of ​​the negative delay cyclic acquisition area.

[0100] The flash memory writes information to the area where the first page of the second region in the negative delay cyclic acquisition area has been erased, and at the same time, the flash memory erases the block area after the information written in the first region in the negative delay cyclic acquisition area.

[0101] This process continues until the last block of the current storage partition is reached, at which point a new storage partition is started.

[0102] Preferably, after the sensor node records the collected information into the flash memory, the explosion field shock wave overpressure measurement method further includes the control platform acquiring information from the sensor node.

[0103] The method by which the control platform obtains information from the sensor nodes includes: the control platform receiving a control signal from a higher-level server and sending a one-way command to the corresponding sensor node. The sensor node then uploads the corresponding information from the flash memory to the control platform according to the one-way command.

[0104] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0105] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An explosion field shock wave overpressure measurement system, characterized by, include: The control platform includes a first BeiDou time synchronization module, which is configured to receive satellite time, and the control platform is connected to the upper-level server via signal. Multiple sensor nodes are provided, each of which is signal-connected to the control platform. Each sensor node is configured to collect the intensity of the explosion shock wave at its location. Each sensor node includes a second Beidou time synchronization module, which is configured to receive satellite time. The sensor node obtains information from the control platform or navigation satellite to synchronize its time with the satellite time and uploads the collected explosion shock wave intensity information to the control platform. At least one correction node is connected to the control platform via a signal. The correction node includes a third BeiDou timing module configured to receive satellite time. The correction node obtains a first satellite time from the control platform and a second satellite time from the navigation satellite, and compares the first and second satellite times to obtain correction parameters.

2. The blast field shock wave overpressure measurement system according to claim 1, wherein, The sensor node also includes: At least one piezoelectric sensor, the at least one piezoelectric sensor being configured to acquire the intensity of the blast shock wave at its location; The communication module is connected to the control platform via signals. The main controller is electrically connected to the at least one piezoelectric sensor and the communication module.

3. The explosion field shock wave overpressure measurement system according to claim 2, characterized in that, The sensor node also includes: a housing; The at least one piezoelectric sensor is embedded in the housing, and the sensing surface of the piezoelectric sensor faces outward; Alternatively, the at least one sensor may be disposed on the outside of the housing, and the information line of the at least one piezoelectric sensor may pass through the housing and be electrically connected to the main controller.

4. The explosion field shock wave overpressure measurement system according to claim 3, characterized in that, The main controller includes: A piezoelectric information processing circuit is electrically connected to the at least one sensor; The FPGA is electrically connected to the piezoelectric information processing circuit. Flash memory is electrically connected to the FPGA.

5. The explosion field shock wave overpressure measurement system according to claim 4, characterized in that, The communication module includes: A wired communication module, wherein the port of the wired communication module is embedded in the housing, and the wired communication module is electrically connected to the FPGA; A wireless communication module is disposed inside the housing and is electrically connected to the FPGA.

6. The explosion field shock wave overpressure measurement system according to claim 5, characterized in that, The sensor node also includes a digital isolator, and both the wired communication module and the wireless communication module are electrically connected to the FPGA through the digital isolator.

7. The explosion field shock wave overpressure measurement system according to claim 6, characterized in that, The control platform also includes: microprocessor; A first wireless communication module is electrically connected to the microprocessor; The network data communication module is electrically connected to the microprocessor and is signal-connected to the upper-level server.

8. A method for measuring the overpressure of a shock wave in an explosion field, applicable to the explosion field shock wave overpressure measurement system described in any one of claims 1 to 7, wherein the explosion field shock wave overpressure measurement system comprises a control platform, sensor nodes, and correction nodes, characterized in that, The method for measuring the overpressure of the shock wave in the explosion field includes: Multiple sensor nodes are arranged at the corresponding locations where the intensity of the explosion shock wave needs to be collected; Start the sensor node, determine whether the sensor node can acquire satellite information, and synchronize the time of the sensor node with the satellite time. If possible, the control platform will be activated to enable communication between the sensor nodes and the control platform. If not, the control platform is activated. The control platform acquires satellite information and synchronizes its time with the satellite time. The control platform communicates with the sensor node and sends its time information to the sensor node. When the control platform is started, the correction node is started simultaneously. The correction node acquires satellite information and generates a first satellite time, and the correction node receives the time information from the control platform and generates a second satellite time. The correction node compares the first satellite time with the second satellite time, and the difference between the first satellite time and the second satellite time is the correction parameter. The correction node then corrects the time information received by the sensor node according to the correction parameter. In the experiment, the sensor node collected information on the intensity of the explosion shock wave at the corresponding location.

9. The method for measuring overpressure of shock waves in an explosion field according to claim 8, characterized in that, The sensor node includes a flash memory with dual chip select functionality; After the sensor node collects the intensity information of the explosion shock wave at the corresponding location, the explosion field shock wave overpressure measurement method further includes the sensor node recording the collected information into the flash memory; The method by which the sensor node records the collected information into the flash memory includes: The flash memory is divided into multiple storage partitions. Each storage partition includes a first partition and a second partition. The first block of the first partition is configured as a parameter area, the first block of the second partition is configured as an information recording area, and the other positions of the first and second partitions are configured as negative delay cyclic acquisition areas. The parameter area includes: the trigger threshold for the intensity of the explosion shock wave, the single / continuous working mode of the explosion experiment, the negative delay time, and the total calibration coefficient; The information recording area includes: the storage location of the explosion shock wave intensity information after the trigger threshold, the stop recording location, and the BeiDou / GPS timing time corresponding to the explosion shock wave intensity information after the trigger threshold; The sensor node writes the collected information into the first page of the first area of ​​the negative delay cyclic acquisition area; The flash memory performs block erasure on the first page of the second area in the negative delay cyclic acquisition area, while the sensor node writes the acquired information into the block area after the information has been written in the first area of ​​the negative delay cyclic acquisition area. The flash memory writes information to the area where the block erasure is completed in the first page of the second area in the negative delay cyclic acquisition area, and at the same time, the flash memory erases the block area after the information written in the first area in the negative delay cyclic acquisition area. This process continues until the last block of the current storage partition is reached, at which point a new storage partition is started.

10. The method for measuring overpressure of shock waves in an explosion field according to claim 9, characterized in that, After the sensor node records the collected information into the flash memory, the explosion field shock wave overpressure measurement method further includes the control platform acquiring information from the sensor node; The method by which the control platform obtains information from the sensor nodes includes: The control platform receives control signals from the upper-level server and sends one-way commands to the corresponding sensor nodes; The sensor node uploads the corresponding information from the flash memory to the control platform according to the one-way command.

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