Static shot test missile-borne pressure test storage device and method

Abstract

This invention discloses a storage device and method for static explosion test missile-borne pressure testing, relating to the field of transient signal storage and testing technology. The device includes: a rechargeable lithium battery module; a power isolation control and signal conditioning module; a negative delay trigger acquisition and storage module, used to acquire static explosion test pressure signals before and after midnight and send them to a first memory for storage upon receiving a first trigger acquisition command and a second trigger acquisition command; a continuous trigger acquisition and storage module, used to acquire static explosion test pressure signals after midnight and send them to a second memory for storage upon receiving a second trigger acquisition command; and a charge output pressure sensor, used to acquire static explosion test pressure signals and send them to the negative delay trigger acquisition and storage module and the continuous trigger acquisition and storage module. This invention overcomes the limitations of traditional missile-borne pressure storage testing methods in the dynamic range and improves the acquisition accuracy under extreme and abnormal environments.

Description

Technical Field

[0001] This invention relates to the field of transient signal storage and testing technology, specifically to a storage device and method for testing and storing projectile pressure during static explosion tests. Background Technology

[0002] As a crucial tool for precision measurement, missile-borne pressure testing technology is widely used in military, aerospace, and materials science fields. Its ability to meet the high precision requirements of complex environments reflects the high sensitivity of modern technology to verifying equipment performance under challenging conditions. Particularly in ammunition development, structural strength assessment, and materials performance testing, missile-borne pressure testing systems have become a hot topic in modern scientific research due to their direct impact on product quality and safety.

[0003] Currently, there are two main methods for testing airborne pressure storage: The first is continuous trigger acquisition, where an external trigger unit provides a "zero" time signal to begin the test, continuously acquiring and storing the pressure response signal. This method typically takes 30 seconds to several minutes. Its advantage is that it allows for long-term signal monitoring and retains relatively complete original data. However, since the starting point of continuous trigger acquisition is triggered by an external trigger unit detecting a certain threshold, it may result in missing initial data, affecting the integrity of the acquired data. The second method is negative delay trigger acquisition, which uses a FIFO (First-In, First-Out) storage structure. Data is continuously acquired and cyclically overwritten before the trigger signal arrives. This method can completely capture data before and after the trigger point and has a certain degree of anti-interference capability. However, its disadvantage is that the storage time is limited by the high-speed memory's capacity, making it difficult to meet the requirements of the test duration. Furthermore, traditional missile-borne pressure testing systems lack dedicated external isolation units, making it impossible to effectively isolate the effects of severe abnormal environments such as explosions. As a result, the testing equipment has poor resistance to abnormal environments and may be damaged during high-intensity explosions. This can lead to the loss or severe distortion of measurement data, making it impossible to obtain accurate pressure signals and complete test results. Summary of the Invention

[0004] This invention addresses the limitations of traditional missile-borne pressure storage testing methods, such as their simplistic approach, limited dynamic range, and low reliability. It provides a static explosion test missile-borne pressure testing storage device and method, overcoming the limitations of traditional missile-borne pressure storage testing methods in terms of dynamic range and improving the accuracy of data acquisition under extreme and abnormal environments.

[0005] This invention is achieved through the following technical solutions.

[0006] In a first aspect, a static explosion test missile-borne pressure testing and storage device is provided, the device comprising:

[0007] A rechargeable lithium battery module is used to provide operating voltage to the device after the static explosion test is initiated;

[0008] The power isolation control and signal conditioning module is connected to the rechargeable lithium battery module and the external DC regulated power supply respectively. It is used to realize the switching between the power supply of the rechargeable lithium battery module and the power supply of the external DC regulated power supply, voltage conversion, and isolation detection of external on / off trigger signals. It also outputs a first trigger acquisition command and a second trigger acquisition command, and conditions the static explosion test pressure signal acquired after the static explosion test is started. The external DC regulated power supply provides the device with the working voltage before the static explosion test is started. The first trigger acquisition command is generated based on the working voltage provided to the device by the external DC regulated power supply before the static explosion test is started, and the second trigger acquisition command is generated based on the external on / off trigger signal.

[0009] The negative delay trigger acquisition and storage module is connected to the power isolation control and signal conditioning module. It is used to acquire the static explosion test pressure signal before and after zero o'clock and send it to the first memory for storage when it receives the first trigger acquisition command and the second trigger acquisition command sent by the power isolation control and signal conditioning module.

[0010] A continuous trigger acquisition and storage module is connected to the power isolation control and signal conditioning module. It is used to acquire the static explosion test pressure signal after zero time and send it to the second memory for storage when the second trigger acquisition command is received from the power isolation control and signal conditioning module.

[0011] A charge output pressure sensor is connected to the negative delay trigger acquisition and storage module and the continuous trigger acquisition and storage module, and is used to acquire the static explosion test pressure signal and send it to the negative delay trigger acquisition and storage module and the continuous trigger acquisition and storage module.

[0012] In some embodiments, the power isolation control and signal conditioning module includes: a power programmable control unit, a plurality of first power converters, and a first complex programmable logic device (CPLD). The power programmable control unit is connected to the rechargeable lithium battery module and the external DC regulated power supply, respectively, and is used to convert the voltages output by the rechargeable lithium battery module and the external DC regulated power supply and output them to the plurality of power converters. The plurality of first power converters convert the received voltages and output them to different pins of the first CPLD, or convert the received voltages into: voltages required for signal conditioning so that the first CPLD can perform signal conditioning, and voltages required for static explosion test pressure signal acquisition.

[0013] In some embodiments, the negative delay trigger acquisition and storage module includes: a second power converter, a first single-channel analog-to-digital converter, and a second CPLD, wherein the second power converter is connected to the second CPLD and is used to convert the voltage required for the acquisition of the static explosion test pressure signal into the voltage required for the operation of the second CPLD; the first single-channel analog-to-digital converter acquires the static explosion test pressure signal under the control of the voltage required for the acquisition of the static explosion test pressure signal and inputs the acquired static explosion test pressure signal to the second CPLD.

[0014] In some embodiments, the continuous trigger acquisition and storage module includes: a third power converter, a second single-channel analog-to-digital converter, and a first field-programmable gate array (FPGA). The third power converter is connected to the first FPGA and is used to convert the voltage required for acquiring the static explosion test pressure signal into the voltage required for the first FPGA to operate. The second single-channel analog-to-digital converter acquires the static explosion test pressure signal under the control of the voltage required for acquiring the static explosion test pressure signal and inputs the acquired static explosion test pressure signal to the first FPGA.

[0015] In some embodiments, the device further includes: an external isolation trigger unit, the external isolation trigger unit comprising a kV-level isolated digital device, an optocoupler isolation device, and an optocoupler relay isolation device, wherein the kV-level isolated digital device, the optocoupler isolation device, and the optocoupler relay isolation device are respectively connected to the first CPLD programmable logic controller.

[0016] In this configuration, the optocoupler isolation device generates an external DC regulated power supply cut-off signal upon receiving the external on / off trigger signal. Under the control of the external DC regulated power supply cut-off signal, the kV-level isolation digital device isolates the first control signal provided by the external DC regulated power supply and generates a second control signal. Under the control of the external DC regulated power supply cut-off signal, the optocoupler relay isolation device isolates the ground of the external DC regulated power supply. The first control signal is used to generate the first trigger acquisition command, and the second control signal is used to generate the second trigger acquisition command.

[0017] In some embodiments, the external isolation triggering unit further includes: an external insulated enameled wire, wherein the external insulated enameled wire is wound around the test projectile and is used to be disconnected after the static explosion test is initiated to generate the external on / off triggering signal.

[0018] In some embodiments, the external isolation triggering unit further includes an isolated bus communication device, which is connected to the second CPLD of the negative delay trigger acquisition and storage module and the first FPGA of the continuous trigger acquisition and storage module, respectively, and is used to instruct the negative delay trigger acquisition and storage module and the continuous trigger acquisition and storage module to erase the first memory and the second memory, respectively, through the isolated bus communication device.

[0019] Secondly, a method for storing static explosion test projectile pressure data is provided, applied to the above-described static explosion test projectile pressure test storage device, the method comprising:

[0020] The power isolation control and signal conditioning module enables switching, voltage conversion, and isolation detection of external on / off trigger signals between the rechargeable lithium battery module power supply and the external DC regulated power supply. It also conditions the static explosion test pressure signal collected after the static explosion test is initiated and outputs a first trigger acquisition command and a second trigger acquisition command. The external DC regulated power supply provides the operating voltage to the device before the static explosion test is initiated; the rechargeable lithium battery module provides the operating voltage to the device after the static explosion test is initiated. The first trigger acquisition command is generated based on the operating voltage provided by the external DC regulated power supply to the device before the static explosion test is initiated, and the second trigger acquisition command is generated based on the external on / off trigger signal.

[0021] The static explosion test pressure signal is acquired by a charge output pressure sensor.

[0022] The negative delay trigger acquisition and storage module acquires the static explosion test pressure signal before and after zero time output by the charge output pressure sensor and sends it to the first memory for storage when it receives the first trigger acquisition command and the second trigger acquisition command.

[0023] By continuously triggering the acquisition and storage module, upon receiving the second trigger acquisition command, the static explosion test pressure signal output by the charge output pressure sensor after zero time is acquired and sent to the second memory for storage.

[0024] In some embodiments, the external DC regulated power supply is isolated under the control of an external on / off trigger signal generated after the static explosion test is initiated, via a kV-level isolated digital device, an optocoupler isolation device, and an optocoupler relay isolation device in the external isolation trigger unit. Specifically, the optocoupler isolation device generates an external DC regulated power supply cut-off signal upon receiving the external on / off trigger signal. Under the control of the external DC regulated power supply cut-off signal, the kV-level isolated digital device isolates a first control signal provided by the external DC regulated power supply and generates a second control signal. Under the control of the external DC regulated power supply cut-off signal, the optocoupler relay isolation device isolates the ground of the external DC regulated power supply. The first control signal is used to generate the first trigger acquisition command, and the second control signal is used to generate the second trigger acquisition command.

[0025] In some embodiments, the external on / off trigger signal is generated by the external insulating enameled wire wrapped around the test projectile in the external isolation trigger unit being disconnected after the static explosion test is started.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects: by using a combination of two different storage technologies to synchronously acquire dual-channel pressure response signals, compared with the traditional single response signal acquisition and storage method, it can ensure that the starting point of the pressure signal is accurately captured while ensuring continuous acquisition of signals for a longer period of time, effectively improving the reliability of pressure signal testing; at the same time, by adopting an external isolation trigger design, the internal test components are completely isolated from the test projectile during the test, ensuring stability during operation in extreme abnormal environments. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a static explosion test missile pressure testing storage device according to an embodiment of the present invention.

[0029] Figure 2 This is a functional diagram of the power isolation control and signal conditioning module according to an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the power isolation control and signal conditioning module according to an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the structure of a negative delay-triggered acquisition and storage module according to an embodiment of the present invention.

[0032] Figure 5 This is a schematic diagram of the structure of a continuous trigger acquisition and storage module according to an embodiment of the present invention.

[0033] Figure 6 This is a flowchart of a static explosion test airborne pressure test storage method according to an embodiment of the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0035] To overcome the shortcomings of traditional missile-borne pressure storage testing methods, this invention provides a static explosion test missile-borne pressure testing storage scheme that combines continuous trigger acquisition and negative delay trigger acquisition methods. This scheme employs a dual-mode data acquisition and storage mechanism, ensuring complete acquisition of dynamic pressure response signals before and after the "zero" moment of the static explosion test, while also meeting the requirements for long-term continuous measurement. Simultaneously, an external isolation unit is incorporated to resist the high overload and strong electromagnetic interference characteristics of the static explosion test environment, thereby ensuring the stability and reliability of the missile-borne pressure storage testing system. This scheme overcomes the limitations of traditional missile-borne pressure storage testing methods within the dynamic range and improves the acquisition accuracy under extreme and abnormal environments.

[0036] On one hand, the present invention provides a storage device for testing and storing the airborne pressure of a static explosion test. Figure 1 This is a schematic diagram of a static explosion test missile-borne pressure testing storage device according to an embodiment of the present invention. (Reference) Figure 1 The static explosion test airborne pressure test storage device includes: a rechargeable lithium battery module; a power isolation control and signal conditioning module; a negative delay trigger acquisition and storage module; a continuous trigger acquisition and storage module; an external isolation trigger unit; and a charge output pressure sensor.

[0037] A rechargeable lithium battery module is used to provide operating voltage to the static explosion test missile pressure test storage device after the static explosion test is initiated.

[0038] The power isolation control and signal conditioning module is connected to the rechargeable lithium battery module and the external DC regulated power supply respectively. It is used to realize the switching between the power supply of the rechargeable lithium battery module and the power supply of the external DC regulated power supply, voltage conversion, and isolation detection of external on / off trigger signals. It also conditions the static explosion test pressure signal collected after the static explosion test is started and outputs the first trigger acquisition command and the second trigger acquisition command. The external DC regulated power supply provides the working voltage to the static explosion test onboard pressure test storage device before the static explosion test is started. The first trigger acquisition command is generated based on the working voltage provided to the device by the external DC regulated power supply before the static explosion test is started. The second trigger acquisition command is generated based on the external on / off trigger signal.

[0039] The negative delay trigger acquisition and storage module is connected to the power isolation control and signal conditioning module. It is used to acquire the static explosion test pressure signal before and after zero time and send it to the first memory for storage when the first trigger acquisition command and the second trigger acquisition command are received.

[0040] The continuous trigger acquisition and storage module is connected to the power isolation control and signal conditioning module. It is used to acquire the static explosion test pressure signal after zero time when the second trigger acquisition command is received and send it to the second memory for storage.

[0041] The charge output pressure sensor, connected to the negative delay trigger acquisition and storage module and the continuous trigger acquisition and storage module, is used to acquire static explosion test pressure signals and send them to the negative delay trigger acquisition and storage module and the continuous trigger acquisition and storage module.

[0042] The following, in conjunction with the accompanying drawings, provides a detailed description of each structure within the static explosion test missile pressure testing storage device.

[0043] The rechargeable lithium battery module is equipped with a rechargeable lithium battery. Any rechargeable lithium battery that meets the maximum design current required for the test can be selected, and the rechargeable lithium battery must also be able to operate for extended periods. As the primary power source for the static explosion test's onboard pressure testing storage device, the rechargeable lithium battery module provides the operating voltage to the device. Through multiple LDO (low dropout linear regulator) power conversion elements in the power isolation control and signal conditioning module, the primary voltage is converted into the secondary voltage required by the signal conditioning unit, data acquisition and storage unit, etc., within the device. Choosing a rechargeable lithium battery as the power supply module ensures the environmental adaptability and performance reliability of the test storage device to high-impact environments. Furthermore, it can be charged using an external DC regulated power supply before the static explosion test is initiated.

[0044] Considering the test environment of the missile-borne pressure test storage device, the power isolation control and signal conditioning need to be integrated to reduce space and improve reliability. That is, the power isolation control and signal conditioning module includes a power isolation control unit and a signal conditioning unit.

[0045] Figure 2 This is a functional diagram of the power isolation control and signal conditioning module according to an embodiment of the present invention. (Refer to...) Figure 2 The power isolation and control unit primarily performs three functions: dynamic isolation and power supply switching between the external DC regulated power supply and the internal lithium battery; conversion of the primary voltage of the lithium battery into the secondary voltage of the data acquisition and storage circuit and the signal conditioning circuit; and isolation and detection of external trigger signals. The signal conditioning unit primarily performs the following functions: conditioning of the pressure sensor signal, including signal filtering and amplification to ensure the stability and reliability of subsequent signal processing; and isolation and impedance transformation of the primary and secondary signals through level boosting and signal following to ensure signal accuracy.

[0046] Figure 3 This is a schematic diagram of the power isolation control and signal conditioning module according to an embodiment of the present invention. (Refer to...) Figure 3 The power isolation control and signal conditioning module includes a power control unit, multiple first power converters, and a first complex programmable logic device (CPLD). The power control unit is connected to the rechargeable lithium battery module and an external DC regulated power supply, respectively, and is used to convert the voltages output from the rechargeable lithium battery module and the external DC regulated power supply and output them to the multiple power converters (LDO power converters). The multiple first power converters convert the received voltages and output them to different pins of the first programmable logic controller, or, under the control of the first CPLD, convert the received voltages into: voltages required for signal conditioning by the first CPLD, and voltages required for static explosion test pressure signal acquisition. For example, the multiple power converters include: a 20V / 3.3V LDO power converter, a 3.3V / 1.8V LDO power converter, a 20V / 5V LDO power converter, etc. The power control unit monitors and receives external on / off trigger signals. Based on the trigger signals, the first CPLD, which acts as the main control unit for power management, is responsible for the timing logic control of all input and output digital signals. This enables data acquisition and storage, and controls the lithium battery to supply power to the test system during high-impact overload conditions to ensure the reliability of the test.

[0047] refer to Figure 3The static explosion test airborne pressure test storage device further includes an external isolation trigger unit, which comprises a kV-level isolation digital device, an optocoupler isolation device, and an optocoupler relay isolation device. The kV-level isolation digital device, optocoupler isolation device, and optocoupler relay isolation device are respectively connected to a first complex programmable logic device (CPLD) to isolate the external DC regulated power supply under the control of the external on / off trigger signal generated after the static explosion test is initiated.

[0048] When the optocoupler receives an external on / off trigger signal, it generates an external DC regulated power supply cut-off signal.

[0049] Under the control of the external DC regulated power supply cutoff signal, the kV-level isolated digital device isolates the first control signal provided by the external DC regulated power supply and generates a second control signal. The first control signal is used to generate a first trigger acquisition command, and the second control signal is used to generate a second trigger acquisition command. The kV-level isolated digital device is designed to address the strong electromagnetic interference generated when the propellant explodes during the ignition of the test projectile. Without the isolation device, the IN0 and IN1 hard-wired command lines inside the test device and the internal ground of the test storage device system would be directly connected to the projectile, and the electromagnetic interference would directly enter the test storage device through conduction or radiation, causing interference to the internal weak electrical signals and leading to malfunction of the test storage device. With the kV-level digital isolation device, the signals inside the test storage device are completely spatially isolated from the external control signals. The test device is a "floating ground" test device, and its test reliability is guaranteed. After the first CPLD receives the hard-wired command to switch the external DC regulated power supply to the internal lithium battery to power the test storage device, it outputs a lithium battery power-on switch command. The power-on switch command drives the power programmable module to open the lithium battery power supply circuit. At this point, even if the external DC regulated power supply is removed, the internal lithium battery will still power the test device. When the external DC regulated power supply voltage is removed, both the lithium battery voltage and the external regulated power supply voltage exist simultaneously. To ensure that the external regulated power supply voltage does not affect the output voltage of the internal lithium battery (e.g., reverse charging the lithium battery and damaging the lithium battery device), the power control module internally isolates the two voltages to ensure that they do not affect each other.

[0050] The optocoupler relay isolation device isolates the ground of the external DC regulated power supply under the control of the external DC regulated power supply cut-off signal. To achieve mutual isolation between the internal ground of the test storage device and the ground of the external DC regulated power supply, and to ensure that the test storage device is a "floating ground" test system relative to the test projectile, the internal and external "grounds" are isolated using optocoupler relays. If the lithium battery is successfully switched to power before the test, the external DC regulated power supply is removed, and the optocoupler relays automatically disconnect, achieving absolute disconnection and isolation between the internal ground and the external ground of the test device.

[0051] The output voltage of the lithium battery or the voltage output of the external DC regulated power supply is converted into a 3.3V digital voltage through a 20V / 3.3V LDO converter as the IO (handheld input) drive voltage of the first CPLD. At the same time, a 1.8V analog voltage is generated by a 3.3V / 1.8V LDO converter as the core drive voltage of the first CPLD, ensuring that the first CPLD works normally.

[0052] In some embodiments, the external isolation trigger unit further includes an external insulated enameled wire, which is wound around the test projectile and is disconnected after the static explosion test is initiated to generate an external on / off trigger signal. The insulated enameled wire is wound around the explosion separation surface of the test projectile to ensure that the separation of the projectile after ignition can break the insulated enameled wire. The on / off state signal of the insulated enameled wire is sent to the first CPLD inside the device through an optocoupler isolation device. After detecting the on / off state of the insulated enameled wire, the first CPLD immediately generates an external DC regulated power supply cut-off signal and outputs a second trigger acquisition command based on the external DC regulated power supply cut-off signal, driving the negative delay acquisition and storage module and the continuous acquisition and storage module to operate.

[0053] Figure 4 This is a schematic diagram of the structure of a negative delay-triggered acquisition and storage module according to an embodiment of the present invention. (Reference) Figure 4 In some embodiments, the negative delay trigger acquisition and storage module includes: a second power converter, a first single-channel analog-to-digital (AD) converter, and a second CPLD. The second power converter is connected to the second CPLD and is used to convert the voltage required for acquiring the static explosion test pressure signal into the voltage required for the second CPLD to operate. Under the control of the voltage required for acquiring the static explosion test pressure signal, the first single-channel AD converter acquires the static explosion test pressure signal and inputs the acquired static explosion test pressure signal to the second CPLD.

[0054] refer to Figure 4 The negative delay trigger acquisition and storage module primarily acquires and stores the pressure signals before and after the initial "zero" pressure at the start of the test. The second power converter can be a 3.3V / 1.8V LDO power converter. Additionally, the negative delay trigger acquisition and storage module may include: a USB (serial bus) data interface device, an isolated 485 bus communication device, and FRAM (ferroelectric memory, the first memory). The USB (serial bus) data interface device is used for data output and readback. The isolated 485 bus communication device, as part of the external isolated trigger unit, instructs the negative delay trigger acquisition and storage module to erase the first memory. The FRAM ferroelectric memory primarily records the effective transient pressure test signal for several hundred milliseconds after the start of the test and the preset negative delay transient pressure test signal for several hundred milliseconds before the start of the test.

[0055] refer to Figure 4 The pressure sensor signal, after being amplified and filtered by the signal conditioning module, is input to the first single-channel AD acquisition module for acquisition. Upon power-up, the second CPLD starts the first single-channel AD converter to cyclically acquire the pressure signal. At this time, the acquired pressure signal data includes hundreds of milliseconds of negative delay signal data within the test time before the test "zero" and is stored in an FRAM-type ferroelectric memory. During the negative delay cyclic acquisition and storage process, the second CPLD simultaneously detects the external trigger acquisition command TR1 (i.e., the second trigger acquisition command at "zero"). Once a change in the level of the trigger signal TR1 is received, it exits the negative delay acquisition and storage mode and switches to sequentially storing the test signal in subsequent storage units, completing the signal acquisition work for hundreds of milliseconds after "zero". The acquired and stored pressure signal is output to the computer via a USB data interface device.

[0056] refer to Figure 4 Considering that no data must be stored in the FRAM-type ferroelectric memory before the test, a command to erase the ferroelectric memory must be executed before the test. Since this device is installed in a special location on the test projectile, the projectile cannot provide sufficient operating space for sending the erase command to the device at close range. Therefore, a command input port based on an isolated 485 bus communication device was designed. The communication transmission rate of the commands designed in this invention is extremely low, ensuring reliable data transmission in complex environments. At the same time, the 485 bus only requires two-wire input, reducing the complexity of cable laying and ensuring ease of operation.

[0057] Figure 5 This is a schematic diagram of the structure of a continuous trigger acquisition and storage module according to an embodiment of the present invention. (Reference) Figure 5 The continuous trigger acquisition and storage module includes: a third power converter, a second single-channel analog-to-digital converter, and a first field-programmable gate array (FPGA). The third power converter is connected to the first FPGA and is used to convert the voltage required for acquiring the static explosion test pressure signal into the voltage required for the first FPGA to operate. Under the control of the voltage required for acquiring the static explosion test pressure signal, the second single-channel analog-to-digital converter acquires the static explosion test pressure signal and inputs the acquired static explosion test pressure signal to the first FPGA.

[0058] refer to Figure 5The continuous trigger acquisition and storage module primarily acquires and stores the pressure signal from the moment the test starts at "zero". The third power converter includes a 3.3V / 1.2V LDO power converter and a 3.3V / 2.5V LDO power converter. The continuous trigger acquisition and storage module may also include: a USB data interface device, an isolated 485 bus communication device, NAND flash memory (secondary memory), and an FPGA configuration chip. The USB (using a serial bus) data interface device is used for data output and readback. The isolated 485 bus communication device, as part of the external isolated trigger unit, instructs the continuous trigger acquisition and storage module to erase the secondary memory. The FPGA configuration chip has a storage capacity of 4Mb and primarily performs the timing logic coordination control of the USB transmission interface, the LDO power conversion unit, and the flash memory.

[0059] refer to Figure 5 The 3.3V voltage output by the power isolation control and signal conditioning module is used as the primary power supply for the continuous trigger acquisition and storage module. The 1.2V voltage is then output by the 3.3V / 1.2V LDO power converter as the core voltage of the first FPGA, and the 2.5V voltage is output by the 3.3V / 2.5V LDO power converter as the AUX auxiliary voltage of the FPGA. The external 3.3V voltage itself is used as the IO voltage of the FPGA to drive the FPGA to work.

[0060] refer to Figure 5 The pressure sensor signal is amplified and filtered by the signal conditioning module before being input to the second single-channel AD acquisition module for acquisition. After the first FPGA is powered on, it continuously monitors and triggers the acquisition command TR1. When TR1 changes (i.e., when it is "zero"), the first FPGA controls the second single-channel AD converter to acquire the pressure signal and continuously stores data into the NAND flash memory in page-by-page programming mode until the memory is full, at which point data acquisition and storage stop. At this point, the entire test process is complete, and the NAND flash memory can store nearly ten minutes of test data from the start of the test, meeting the system design requirements.

[0061] In this invention, a combination of two different storage technologies is used to synchronously acquire dual-channel pressure response signals. Compared with the traditional single-response signal acquisition and storage method, this method can ensure that the starting point of the pressure signal is accurately captured while ensuring continuous acquisition of the signal for a longer period of time, effectively improving the reliability of pressure signal testing. At the same time, an external isolation trigger design is adopted to completely isolate the internal test components from the test projectile during the test, ensuring stability during operation in extreme and abnormal environments.

[0062] On the other hand, the present invention provides a method for storing static explosion test missile load pressure. Figure 6This is a flowchart illustrating a method for storing static explosion test missile load pressure data according to an embodiment of the present invention. (Reference) Figure 6 The static explosion test airborne pressure test storage method includes: S10 to S40.

[0063] In S10, the power isolation control and signal conditioning module realizes the switching between the rechargeable lithium battery module power supply and the external DC regulated power supply, voltage conversion, and isolation detection of external on / off trigger signals. It also conditions the static explosion test pressure signal collected after the static explosion test is started and outputs the first trigger acquisition command and the second trigger acquisition command. The external DC regulated power supply provides the working voltage to the static explosion test projectile pressure test storage device before the static explosion test is started; the rechargeable lithium battery module provides the working voltage to the static explosion test projectile pressure test storage device after the static explosion test is started. The first trigger acquisition command is generated based on the working voltage provided to the device by the external DC regulated power supply before the static explosion test is started, and the second trigger acquisition command is generated based on the external on / off trigger signal.

[0064] In S20, a charge output pressure sensor is used to collect the static explosion test pressure signal.

[0065] In S30, the negative delay trigger acquisition and storage module acquires the static explosion test pressure signal before and after zero time output by the charge output pressure sensor and sends it to the first memory for storage when it receives the first trigger acquisition command and the second trigger acquisition command output by the power isolation control and signal conditioning module.

[0066] In S40, by continuously triggering the acquisition and storage module, upon receiving the second trigger acquisition command output by the power isolation control and signal conditioning module, the static explosion test pressure signal output by the charge output pressure sensor after zero time is acquired and sent to the second memory for storage.

[0067] In some embodiments, the external DC regulated power supply is isolated under the control of the external on / off trigger signal generated after the static explosion test is initiated, through the kV-level isolated digital device, optocoupler isolation device, and optocoupler relay isolation device in the external isolation trigger unit. Specifically, the optocoupler isolation device generates an external DC regulated power supply cut-off signal upon receiving the external on / off trigger signal. Under the control of the external DC regulated power supply cut-off signal, the kV-level isolated digital device isolates the first control signal provided by the external DC regulated power supply and generates a second control signal. Under the control of the external DC regulated power supply cut-off signal, the optocoupler relay isolation device isolates the ground of the external DC regulated power supply. The first control signal is used to generate a first trigger acquisition command, and the second control signal is used to generate a second trigger acquisition command.

[0068] In some embodiments, the external on / off trigger signal is generated by the external insulated enameled wire wrapped around the test projectile in the external isolation trigger unit being disconnected after the static explosion test is started.

[0069] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A static explosion test missile load pressure testing and storage device, characterized in that, The device includes: A rechargeable lithium battery module is used to provide operating voltage to the device after the static explosion test is initiated; The power isolation control and signal conditioning module is connected to the rechargeable lithium battery module and the external DC regulated power supply respectively. It is used to realize the switching between the power supply of the rechargeable lithium battery module and the power supply of the external DC regulated power supply, voltage conversion, and isolation detection of external on / off trigger signals. It also conditions the static explosion test pressure signal collected after the static explosion test is started and outputs a first trigger acquisition command and a second trigger acquisition command. The external DC regulated power supply provides the device with the working voltage before the static explosion test is started. The first trigger acquisition command is generated based on the working voltage provided to the device by the external DC regulated power supply before the static explosion test is started. The second trigger acquisition command is generated based on the external on / off trigger signal. A negative delay trigger acquisition and storage module, connected to the power isolation control and signal conditioning module, is used to acquire the static explosion test pressure signal before and after zero time and send it to the first memory for storage when it receives the first trigger acquisition command and the second trigger acquisition command sent by the power isolation control and signal conditioning module. A continuous trigger acquisition and storage module is connected to the power isolation control and signal conditioning module. It is used to acquire the static explosion test pressure signal after zero time and send it to the second memory for storage when the second trigger acquisition command is received from the power isolation control and signal conditioning module. A charge output pressure sensor is connected to the negative delay trigger acquisition and storage module and the continuous trigger acquisition and storage module, and is used to acquire the static explosion test pressure signal and send it to the negative delay trigger acquisition and storage module and the continuous trigger acquisition and storage module.

2. The apparatus according to claim 1, characterized in that, The power isolation control and signal conditioning module includes: a power programmable control unit, multiple first power converters, and a first complex programmable logic device (CPLD). The power programmable control unit is connected to the rechargeable lithium battery module and the external DC regulated power supply, respectively, and is used to convert the voltage output by the rechargeable lithium battery module and the external DC regulated power supply and output it to the multiple power converters. The multiple first power converters convert the received voltage and output it to different pins of the first CPLD, or convert the received voltage into the voltage required for signal conditioning by the first CPLD and the voltage required for static explosion test pressure signal acquisition under the control of the first CPLD.

3. The apparatus according to claim 2, characterized in that, The negative delay trigger acquisition and storage module includes: a second power converter, a first single-channel analog-to-digital converter, and a second CPLD. The second power converter is connected to the second CPLD and is used to convert the voltage required for the acquisition of the static explosion test pressure signal into the voltage required for the operation of the second CPLD. The first single-channel analog-to-digital converter acquires the static explosion test pressure signal under the control of the voltage required for the acquisition of the static explosion test pressure signal and inputs the acquired static explosion test pressure signal to the second CPLD.

4. The apparatus according to claim 2, characterized in that, The continuous trigger acquisition and storage module includes: a third power converter, a second single-channel analog-to-digital converter, and a first field-programmable gate array (FPGA). The third power converter is connected to the first FPGA and is used to convert the voltage required for acquiring the static explosion test pressure signal into the voltage required for the first FPGA to operate. The second single-channel analog-to-digital converter acquires the static explosion test pressure signal under the control of the voltage required for acquiring the static explosion test pressure signal and inputs the acquired static explosion test pressure signal to the first FPGA.

5. The apparatus according to any one of claims 2 to 4, characterized in that, The device further includes an external isolation trigger unit, which comprises a kV-level isolated digital device, an optocoupler isolation device, and an optocoupler relay isolation device. The kV-level isolated digital device, the optocoupler isolation device, and the optocoupler relay isolation device are respectively connected to the first CPLD programmable logic controller. In this configuration, the optocoupler isolation device generates an external DC regulated power supply cut-off signal upon receiving the external on / off trigger signal. Under the control of the external DC regulated power supply cut-off signal, the kV-level isolation digital device isolates the first control signal provided by the external DC regulated power supply and generates a second control signal. Under the control of the external DC regulated power supply cut-off signal, the optocoupler relay isolation device isolates the ground of the external DC regulated power supply. The first control signal is used to generate the first trigger acquisition command, and the second control signal is used to generate the second trigger acquisition command.

6. The apparatus according to claim 5, characterized in that, The external isolation triggering unit further includes: an external insulated enameled wire, wherein the external insulated enameled wire is wound around the test projectile and is used to be disconnected after the static explosion test is initiated to generate the external on / off triggering signal.

7. The apparatus according to claim 5, characterized in that, The external isolation triggering unit also includes an isolated bus communication device, which is connected to the second CPLD of the negative delay trigger acquisition and storage module and the first FPGA of the continuous trigger acquisition and storage module, respectively, and is used to instruct the negative delay trigger acquisition and storage module and the continuous trigger acquisition and storage module to erase the first memory and the second memory, respectively, through the isolated bus communication device.

8. A method for storing test data of projectile-borne pressure during static explosion tests, characterized in that, The method applied to the static explosion test missile pressure test storage device of claim 1, the method comprising: The power isolation control and signal conditioning module enables switching, voltage conversion, and isolation detection of external on / off trigger signals between the rechargeable lithium battery module power supply and the external DC regulated power supply. It also conditions the static explosion test pressure signal collected after the static explosion test is initiated and outputs a first trigger acquisition command and a second trigger acquisition command. The external DC regulated power supply provides the operating voltage to the device before the static explosion test is initiated; the rechargeable lithium battery module provides the operating voltage to the device after the static explosion test is initiated. The first trigger acquisition command is generated based on the operating voltage provided by the external DC regulated power supply to the device before the static explosion test is initiated, and the second trigger acquisition command is generated based on the external on / off trigger signal. The static explosion test pressure signal is acquired by a charge output pressure sensor. The negative delay trigger acquisition and storage module, upon receiving the first and second trigger acquisition commands output by the power isolation control and signal conditioning module, acquires the static explosion test pressure signal before and after zero time output by the charge output pressure sensor and sends it to the first memory for storage. By continuously triggering the acquisition and storage module, upon receiving the second trigger acquisition command output by the power isolation control and signal conditioning module, the static explosion test pressure signal output by the charge output pressure sensor after zero time is acquired and sent to the second memory for storage.

9. The method according to claim 8, characterized in that, The external DC regulated power supply is isolated by the kV-level isolation digital device, optocoupler isolation device, and optocoupler relay isolation device in the external isolation trigger unit under the control of the external on / off trigger signal generated after the static explosion test is started. Specifically, the optocoupler isolation device generates an external DC regulated power supply cut-off signal upon receiving the external on / off trigger signal. Under the control of the external DC regulated power supply cut-off signal, the kV-level isolation digital device isolates the first control signal provided by the external DC regulated power supply and generates a second control signal. Under the control of the external DC regulated power supply cut-off signal, the optocoupler relay isolation device isolates the ground of the external DC regulated power supply. The first control signal is used to generate the first trigger acquisition command, and the second control signal is used to generate the second trigger acquisition command.

10. The method according to claim 8, characterized in that, The external on / off trigger signal is generated by the disconnection of the external insulating enameled wire wrapped around the test projectile in the external isolation trigger unit after the static explosion test is started.

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