Off-line detection system for a barrier vessel control device

Abstract

This utility model discloses an offline testing system for the launch control device of a breaching vessel, within the field of electronic testing of breaching vessels. The offline testing system includes: a fuze detection unit, a primer detection unit, and a display and control unit. The fuze detection unit receives and detects fuze commands issued by the launch control device under test. The fuze commands are level pulse sequences with power-on identification codes, and the system detects the validity of the encoding and timing parameters of the fuze commands. The primer detection unit simulates primer load and detects the energy of the primer trigger pulse issued by the launch control device under test. The display and control unit sends simulated control commands to the launch control device under test and receives the detection results from the fuze detection unit and the primer detection unit. This testing system, through the collaboration of the fuze, primer detection unit, and display and control unit, achieves offline testing of the launch control device's function, replacing the use of physical pyrotechnic devices to form a closed-loop test, eliminating the risk of false triggering, and improving testing efficiency and safety.

Description

Technical Field

[0001] This utility model relates to the field of electronic detection technology for obstacle breaching vessels, and in particular to an offline detection system for the control device of an obstacle breaching vessel. Background Technology

[0002] In obstacle breaching operations, the weapon system of the obstacle breaching vessel is the equipment for launching and controlling munitions, which directly determines the success or failure of the mission. It has extremely high requirements for safety and reliability, and the instructions must be accurate and error-free, without the slightest malfunction.

[0003] Traditional detection methods rely on actual pyrotechnic devices or complex detection architectures, which have problems such as false triggering risks, signal loss, and response delays. This results in high safety risks, low detection efficiency, and unclear fault location, and cannot meet the high safety and high efficiency requirements for offline detection of the control devices of obstacle breaching vessels. Utility Model Content

[0004] This application provides an offline detection system for the control device of a breaching vessel, which solves the problems of false triggering risk, signal loss, and response delay in traditional detection methods. It achieves high safety, high detection efficiency, and accurate fault location, and is suitable for rapid fault diagnosis and maintenance of the control device of a breaching vessel.

[0005] This application provides an offline detection system for the control device of a breaching vessel, including: a fuze detection unit, a primer detection unit, and a display and control unit; The fuze detection unit is used to receive and detect the fuze command issued by the tested control device. The fuze command is a sequence of level pulses with power-on identification code. The unit detects the validity of the encoding and timing parameters of the fuze command. The primer detection unit is used to simulate primer load and detect the energy of the primer trigger pulse emitted by the tested firing control device; The display and control unit is used to send analog control commands to the test launch control device and receive the test results from the fuze detection unit and the primer detection unit, and to display the working status of the test launch control device in a visual manner. The display and control unit includes a display and control circuit and a display screen. The display and control circuit includes a display and control circuit microcontroller and an output circuit. The fuze detection unit includes multiple independent fuze detection modules, and the primer detection unit includes multiple independent primer detection modules. Each fuze detection module and primer detection module communicates with the display and control circuit microcontroller.

[0006] The beneficial effects of the above embodiments are as follows: This offline testing system for the launch control device of a breaching vessel is used to perform functional testing on the launch control device, a crucial piece of equipment on the breaching vessel. Based on simulating all input signals of the launch control device, it detects the output response signal of the launch control device to determine whether the device is functioning normally, ensuring that it meets actual requirements. This testing system, through the coordination of the fuse, primer detection unit, and display and control unit, achieves offline testing of the launch control device's function, replacing the actual pyrotechnic devices to form a closed-loop test, eliminating the risk of false triggering. Simultaneously, it supports parallel processing of multiple signals, improving testing efficiency and safety.

[0007] Based on the above embodiments, this application can be further improved as follows: In one embodiment of this application, the fuze detection unit includes several fuze detection modules, and each fuze detection module includes an optocoupler isolation circuit, a waveform shaping circuit, and a microcontroller; The optocoupler isolation circuit is used to electrically isolate the fuze commands issued by the tested control device; The waveform shaping circuit is used to convert the isolated fuze command into a TTL encoded sequence; The microcontroller is used to encode and identify the TTL encoded sequence and measure timing parameters, including the setup time width. Technical benefits: The optocoupler isolation circuit achieves electrical isolation, avoiding external interference; the waveform shaping circuit ensures signal stability; the microcontroller measures timing parameters with high precision (1ms accuracy), improving the accuracy of fuze command detection.

[0008] In one embodiment of this application, the microcontroller of the fuze detection unit uses a state machine approach to implement encoding detection, including idle, synchronization, code reading, stop, start, and timing states. The reference pulse width of the fuze command encoding signal is 5ms, the transmission baud rate is 200bps, the transmission process prioritizes the least significant bit, and the time width signal transmission is active high. Technical effect: The state machine approach ensures rigorous encoding detection logic; the reference pulse width, baud rate, and other parameters match the transmission control device protocol, achieving accurate identification and verification of the fuze command and avoiding misjudgment of illegal commands.

[0009] In one embodiment of this application, the primer detection unit includes several primer detection modules, and the primer detection module includes a load simulation circuit, an optocoupler isolation circuit, a waveform shaping circuit, and a microcontroller; The load simulation circuit includes a resistive element to simulate the resistive characteristics of the primer device and form a load for the primer trigger pulse. The optocoupler isolation circuit is used to convert the amplitude change of the primer trigger signal into the width change of the primer trigger pulse; The waveform shaping circuit is used to convert the isolated primer trigger pulse into a TTL pulse. The microcontroller measures the width of the TTL pulse using pulse capture to determine the validity of the primer trigger pulse energy, with a detection accuracy of 1µs. Technical benefits: The load simulation circuit replaces the physical primer, reducing safety risks; optocoupler isolation and 1µs pulse width measurement enable quantitative detection of primer energy, ensuring accurate determination of trigger pulse energy.

[0010] In one embodiment of this application, the microcontroller of the display and control circuit is connected to the fuze detection unit and the primer detection unit via an I2C bus, and to the display screen via an RS485 bus; the output circuit includes an analog boost circuit and an analog transmission circuit, which send preset analog boost or analog transmission commands to the tested control device. Technical effect: The display and control unit is used to control the detection process and display the detection status, realizing human-machine interaction and intuitively displaying the detection results.

[0011] This application also provides a detection method for the offline detection system of the above-mentioned obstacle breaching vessel control device, including the following steps: S1: Select the detection mode through the display and control unit. If it is the independent detection mode, the display and control unit will issue a simulated boost command and a simulated transmission command. If it is the online detection mode, the tested control device will issue a boost command and a transmission command. S2: The fuze detection unit receives the fuze command issued by the tested control device, and detects the encoding sequence and timing parameters of the fuze command. If the encoding is valid and the timing parameters meet the preset range, the fuze function is determined to be normal. S3: The primer detection unit simulates the primer load, receives the primer trigger pulse sent by the tested control device, and determines whether the energy is effective by measuring the pulse width. If the pulse width exceeds the preset threshold, the primer function is determined to be normal. S4: The display and control unit receives the test results from the fuze detection unit and the primer detection unit, and displays the status of each fuze and primer through indicator lights. Technical benefits: Standardized testing procedures ensure operational consistency; combined with system hardware, automated determination of fuze and primer functions is achieved; indicator lights provide intuitive feedback, reducing human error and improving testing reliability.

[0012] In one embodiment of this application, in step S2, the timing parameters of the fuze command include the setting time width, with a measurement accuracy of 1ms; in step S3, the detection accuracy of the primer trigger pulse is 1µs, and if the determination is valid, the corresponding primer status indicator light in the display and control unit illuminates. Technical advantages: The 1ms setting time accuracy and 1µs primer pulse width accuracy ensure accurate quantification of detection data, and the indicator light illumination duration facilitates manual recording of results, balancing detection accuracy and operational convenience.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. High safety: Simulated fuses and primer loads replace actual pyrotechnic devices, and closed-loop testing eliminates the risk of false triggering; 2. High detection efficiency: Multi-channel parallel detection architecture (≥18 channels) instantly processes all channel signals, solving the signal loss and delay problems of traditional serial detection; 3. Precise diagnosis: Quantitative detection of fuze coding, timing, and primer energy enables accurate fault location; 4. Wide applicability: Supports dynamic online testing (real-world testing) and static independent testing (routine maintenance); 5. High reliability: Each module has an independent hardware channel, strong anti-interference ability, and high system stability. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of the structure of an offline detection system for a obstacle-clearing vessel control device according to an embodiment of this application; Figure 2 This is a circuit diagram of the fuze detection module in an embodiment of this application; Figure 3 This is a flowchart illustrating the steps of fuze detection in an embodiment of this application; Figure 4 This is a flowchart illustrating the primer detection steps in an embodiment of this application. Figure 5 This is a structural block diagram of the display and control unit in the embodiments of this application; Figure 6 This is a circuit diagram of the output circuit in an embodiment of this application; Figure 7 This is a schematic diagram of the interface of the display and control unit in the embodiments of this application; Figure 8 This is a structural block diagram of an offline detection system for a obstacle-breaking vessel control device according to an embodiment of this application. Detailed Implementation

[0016] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and not for limiting the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0017] Example: like Figure 1 As shown, an offline detection system for a breaching vessel's control device includes a fuze detection unit, a primer detection unit, and a display and control unit.

[0018] The fuze detection unit is used to receive and detect the fuze command issued by the tested control device. The fuze command is a sequence of level pulses with power-on identification code. The fuze detection unit detects the validity of the encoding and timing parameters of the fuze command. The fuze detection unit includes several fuze detection modules, such as Figure 2 As shown, the fuze detection module includes an optocoupler isolation circuit, a waveform shaping circuit, a microcontroller U1, and auxiliary circuits connected in sequence. Optical isolation circuits are used to electrically isolate the fuze commands issued by the tested control device; The waveform shaping circuit is used to invert the output signal of the optocoupler circuit and convert it into a TTL encoded sequence; The microcontroller U1 is used to encode and recognize TTL encoded sequences and measure timing parameters, including the setup time width, with a measurement accuracy of 1ms.

[0019] In addition, the fuze detection module also includes an external interface JP1 and a microcontroller program download port J1. The external interface JP1 is used to connect I2C signals, primer signals, power supplies, etc. In the fuze detection module, R1 and D1 act as thresholds. R1 and D1 also act as voltage regulators to prevent excessive voltage between the input DH+ and DH-, which could damage the optocoupler U2. D1 is a Zener diode, model 1N5993B, with a stable voltage of 5.1V; R1 is a current-limiting resistor. When the input signal amplitude (the voltage between DH+ and DH-) is higher than 5.1V, the voltage value of DH+ is stabilized at 5.1V, and the optocoupler U2 conducts; when it is lower than 5.1V, the optocoupler U2 does not conduct.

[0020] The fuze detection module converts the fuze encoding sequence (DH+, DH-) emitted by the firing control device into a TTL encoding sequence through an optocoupler isolation circuit (U2, PC817) and a waveform shaping circuit (U3, Aip74LVC1G14 is a Schmitt-NOR gate chip that flips the output signal of the optocoupler circuit) and sends it to the fuze detection microcontroller (U1, STC8G1K17A-SOP8) for encoding detection.

[0021] In practice, the fuze command signal of the tested control device is a digital signal composed of a sequence of level pulses. The base pulse width of the encoded signal is 5ms, the encoded transmission baud rate is 200bps, the transmission process prioritizes the least significant bit, and the time width signal is active high. The microcontroller U1 of the fuze detection unit detects the fuze command signal through the digital port, performs encoding recognition and time width measurement according to the protocol, and responds to valid fuze commands.

[0022] Specifically, the fuze command detection process is as follows: like Figure 3 As shown, after the microcontroller of the fuze detection unit is powered on, it continuously monitors the rising edge of the fuze encoding signal. Upon detecting the rising edge, it enters the encoding synchronization state. The microcontroller encoding detection is implemented using a state machine, including states such as idle, synchronization, code reading, stop, start, and timing. The base pulse width of the encoding signal is 5ms (code element), the encoding sampling baud rate is 200bps, the sampling process prioritizes the least significant bit, and the code width is 16 bits. After detecting the complete fuze command control code, the microcontroller performs command verification. For the "Power On" command, it verifies whether the power-on pulse duration and codeword meet the requirements; for the "Set Up" command, it verifies whether the first and last codewords of the setting up meet the requirements. The sampling frequency of the fuze power-on pulse and setting up time signal is 1kHz, and the detection accuracy is 1ms. During the receiving of the setting up timing signal, the microcontroller outputs a timing indication signal to the display and control unit. After receiving the "Timing" start command, the microcontroller outputs a delay indication signal to the display and control unit.

[0023] The fuse detection module has the following functions: a) Power-on control detection function: The fuze detection module can detect the fuze commands (fuze commands are a sequence of level pulses with power-on identification codes) issued by the controlled device under test. Any command that does not conform to the code is an illegal command and will be automatically rejected by the fuze detection module.

[0024] b) Time setting detection function: The tested control device applies a pulse of a certain time width to the input terminal of the fuze detection module. The fuze detection unit identifies the coded sequence and measures the setting time width at the same time. If the instruction code is valid, the setting time is recorded.

[0025] The primer detection unit is used to simulate primer load and detect the energy of the primer trigger pulse emitted by the tested firing control device; The primer detection unit contains several primer detection modules. The circuit structure of the primer detection module is consistent with the circuit structure of the fuze detection module, such as... Figure 2 As shown, the primer detection unit includes a load simulation circuit, an optocoupler isolation circuit, a waveform shaping circuit, and a microcontroller; The load simulation circuit includes resistive elements to simulate the resistive characteristics of the primer device, forming a load for the primer trigger pulse; Optocoupler isolation circuits are used to convert the amplitude variation of the primer trigger signal into the width variation of the primer trigger pulse; The waveform shaping circuit is used to convert the isolated primer trigger pulse into a TTL pulse. The Schmitt inverter U3 in the waveform shaping circuit flips the input signal and converts the edge changes of the input signal into a steep pulse signal (TTL signal), which can effectively filter noise interference and improve the stability and reliability of the signal.

[0026] The microcontroller measures the width of the TTL pulse using pulse capture to determine whether the primer trigger pulse energy is valid.

[0027] The primer detection module samples the primer trigger signal via an optocoupler (U2). Utilizing the inherent non-linear conduction characteristics of the optocoupler, the amplitude variation of the primer trigger signal is converted into a pulse width variation in the sampled signal. A microcontroller (U1) measures the pulse width of the sampled signal to detect the energy of the primer trigger signal. The pulse width value measured by the microcontroller reflects the magnitude of the primer signal energy. For sampled signals with pulse widths exceeding a threshold value, the microcontroller classifies them as valid primer trigger signals.

[0028] In the primer detection module, the primer trigger signal levels DH+ and DH- are sent to the signal input terminal of the DH detection module. R1 is a simulated primer load. According to the discharge principle of the capacitor, the voltage across R1 decreases exponentially. D1 is a Zener diode. The operating voltage threshold of the optocoupler U2 is set. When the voltage across R1 is higher than the voltage threshold, the optocoupler U2 operates, and DHMC is a high-level signal. During the discharge process of the primer capacitor, DHMC receives a high-level logic pulse. The high-level pulse width is detected by the microcontroller U1. After determining that the primer pulse width meets the requirements, the primer status indicator level is output to display the detection result.

[0029] In practice, the primer device inside the ammunition exhibits a certain resistance value, forming a load on the primer electrical pulse signal of the test firing control device. In this system, the primer detection unit simulates the primer load. After the primer trigger signal from the test firing control device is applied to the primer device, its signal characteristics conform to the capacitor discharge curve, forming a primer pulse signal with continuously decreasing voltage. The primer detection unit converts the primer trigger signal from the test firing control device into a TTL pulse through an optocoupler isolation circuit and sends it to the primer detection microcontroller (U1) for pulse width detection.

[0030] Specifically, the primer pulse detection process is as follows: like Figure 4As shown, after the microcontroller of the primer detection unit is powered on, it continuously monitors the rising edge of the primer pulse signal. Upon detecting the rising edge, it enters the pulse width counting state. The pulse width detection is implemented using PCA pulse capture, with the capture and counting clock frequency set to 1MHz and the detection accuracy to 1µs. If the detected primer trigger pulse width value exceeds a preset threshold, the primer trigger pulse is deemed valid, and the microcontroller outputs a 30s (human-set value) indication signal to the display and control unit for display.

[0031] The display and control unit is used to send analog control commands to the test launch control device and receive the test results from the fuze detection unit and the primer detection unit, and to display the status of the test launch control device in a visual manner.

[0032] The display control unit includes a display control circuit and a display screen. The display control circuit is composed as follows: Figure 5 As shown, it includes a display and control circuit, a microcontroller, and an output circuit.

[0033] The output circuit includes an analog boost circuit and an analog transmission circuit, which send preset analog boost or analog transmission commands to the tested control device. The circuit structures of the analog boost circuit and the analog transmission circuit are identical as follows: Figure 6 As shown, "Sig_Out" is issued by the microcontroller of the display and control unit (model STM32F103VCT6), V1 is a PNP transistor, and R2 is a 30Ω current-limiting resistor. "Sig_Out" is triggered by the corresponding virtual button. For example, when the analog boost or analog transmit button is pressed, "Sig_Out" is set to a low level, sending a preset analog boost or analog transmit command to the device under test, which receives the corresponding command. When idle, "Sig_Out" is set to a high level.

[0034] The main interface of the display and control unit is as follows Figure 7 As shown, "Simulated Boost" and "Simulated Launch" are two virtual, illuminated, self-locking buttons used to manually simulate "boost" and "launch" commands during launch control device testing. The "Reset" button is a virtual, illuminated, self-resetting button used to reset the "Simulated Boost" and "Simulated Launch" data, as well as the data from each testing module, allowing the testing process to restart without power interruption. A1-4, B1-4, C1-4, D1-4, and T1-2 correspond to 18 indicator lights for fuze and primer status, providing a visual display of each testing status.

[0035] The microcontroller of the display control circuit is connected to the fuze detection unit and the primer detection unit via the I2C bus. The microcontroller used in the display control circuit is STMicroelectronics' STM32F103VCT6, and the display screen is Weintek's TK6072IP.

[0036] The microcontroller of the display control circuit communicates with the display screen via RS485 bus, reads the commands of the analog boost button and analog transmit button, and controls the microcontroller of the display control circuit to trigger the analog boost or analog transmit operation to realize human-computer interaction.

[0037] After the fuze detection module or primer detection module detects the correct signal, it will register a signal at SIGN on R4 (see...). Figure 2 The output is high if the signal is high, otherwise low. The SIGN signal of the fuze detection module or primer detection module is directly connected to the input detection circuit pin of the display control circuit. The microcontroller of the display control circuit will indicate whether the signal is high or low by displaying the corresponding indicator light on or off on the screen.

[0038] Furthermore, the tested launch control device emits multiple fuze command signals and primer pulse signals simultaneously.

[0039] Therefore, the fuze detection unit and primer detection unit of this detection system are implemented based on multi-channel parallel detection technology, enabling simultaneous detection of multiple fuze control signals and multiple primer pulse energies. Specifically: The fuze detection unit consists of N parallel fuze detection modules (the number is determined by the device under test, with one detection module for each signal). Each fuze detection module has an independent microcontroller that processes one fuze command signal. The N fuze detection modules simultaneously detect N fuze command signals.

[0040] The primer detection unit contains N primer detection modules (one detection module is equipped with one primer pulse signal, and the number is determined by the device under test). Each primer detection module has an independent microcontroller that processes one primer pulse signal. The N primer detection modules detect N primer pulse signals simultaneously.

[0041] Detection system such as Figure 8 As shown, the system integrates multiple functionally independent fuse detection modules and primer detection modules, each dedicated to processing a specific signal. These modules communicate directly with the display and control unit microcontroller through their respective microcontrollers, thus constructing a multi-channel parallel processing channel. Compared to traditional serial or time-division multiplexing detection schemes, the advantages of this invention are: even under conditions where multiple signals are input simultaneously, it can ensure that all signals are detected instantaneously without omission, effectively avoiding signal omissions or response delays caused by sequential scanning by the processor, and significantly improving the system's detection efficiency and real-time response.

[0042] An offline testing method for the control device of a breaching vessel, based on the aforementioned offline testing system, includes the following steps: S1: Select the detection mode through the display and control unit. If it is the independent detection mode, the display and control unit will issue a simulated boost command and a simulated transmission command. If it is the online detection mode, the tested control device will issue a boost command and a transmission command. S2: The fuze detection unit receives the fuze command issued by the tested control device, and detects the encoding sequence and timing parameters of the fuze command. If the encoding is valid and the timing parameters meet the preset range, the fuze function is determined to be normal. S3: The primer detection unit simulates the primer load, receives the primer trigger pulse sent by the tested control device, and determines whether the energy is effective by measuring the pulse width. If the pulse width exceeds the preset threshold, the primer function is determined to be normal. S4: The display and control unit receives the detection results from the fuze detection unit and the primer detection unit, and displays the status of each fuze and primer.

[0043] The test system for the launch control unit (RCU) supports both online and independent testing modes. The difference between the two modes lies in whether the boost and launch commands sent to the RCU testing system are actual or simulated signals. In online testing mode, the boost and launch commands are issued by the device under test (DUT); in independent testing mode, both commands are simulated by the RCU testing instrument. Online testing mode is suitable for dynamic testing during actual flight trials, while independent testing mode is suitable for static maintenance testing. In both modes, all output signals from the RCU under test are connected to the RCU testing system. The RCU testing system uses its internally simulated fuses and primers instead of the actual fuses and primers, ensuring testing safety.

[0044] After the test device completes its self-test, press the "Simulated Boost" and "Simulated Launch" buttons on the test device detection system in sequence to provide the necessary commands and signals for the device under test to operate. The test device detection system determines whether the device under test is faulty by detecting the power-on, timing, start-timing commands, and primer trigger pulses of the 18 fuzes generated by the device under test. During the power-on and timing process, if the received fuze signal code string is correct, the corresponding 18 fuze status indicator lights will illuminate for 60 seconds. After the test device issues the "Simulated Launch" command, if a correct fuze start-timing command is received, the 18 fuze status indicator lights will illuminate for 60 seconds (i.e., the execution time); simultaneously, if a primer trigger pulse with sufficient energy is received, the corresponding 18 primer status indicator lights will illuminate for 30 seconds. The illumination time is manually set.

[0045] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: 1. High safety: The internally simulated fuse and primer load completely replace the actual pyrotechnic device, forming a closed-loop test in an offline environment, which completely eliminates the risk of false triggering caused by detection.

[0046] 2. High detection efficiency: Adopting a multi-channel parallel detection architecture, it can instantly capture and process signals from all channels, solving the signal loss and response delay problems of traditional serial detection methods, and greatly improving the detection speed.

[0047] 3. Precise diagnosis: Simultaneously, the encoding, timing, and primer pulse energy of the fuze command are quantitatively detected, which can accurately determine the fault type and location, and has strong fault location capability.

[0048] 4. Wide applicability: It integrates both online and independent detection modes, which can meet the dynamic detection needs under working conditions, as well as be suitable for daily static maintenance and repair, making it flexible in application scenarios.

[0049] 5. High reliability: Each detection module adopts an independent hardware processing channel, which does not interfere with each other, resulting in stronger system stability and anti-interference ability.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An offline detection system for a breaching vessel's control device, characterized in that, include: Fuze detection unit, primer detection unit, and display and control unit; The fuze detection unit is used to receive and detect the fuze command issued by the tested control device. The fuze command is a sequence of level pulses with power-on identification code. The unit detects the validity of the encoding and timing parameters of the fuze command. The primer detection unit is used to simulate primer load and detect the energy of the primer trigger pulse emitted by the tested firing control device; The display and control unit is used to send analog control commands to the test launch control device, receive the test results from the fuze detection unit and the primer detection unit, and display the working status of the test launch control device. The display and control unit includes a display and control circuit and a display screen. The display and control circuit includes a display and control circuit microcontroller and an output circuit. The fuze detection unit includes multiple independent fuze detection modules, and the primer detection unit includes multiple independent primer detection modules. Each fuze detection module and primer detection module communicates with the display and control circuit microcontroller.

2. The offline detection system according to claim 1, characterized in that: The fuze detection unit includes several fuze detection modules, each of which includes an optocoupler isolation circuit, a waveform shaping circuit, and a microcontroller. The optocoupler isolation circuit is used to electrically isolate the fuze commands issued by the tested control device; The waveform shaping circuit is used to convert the isolated fuze command into a TTL encoded sequence; The microcontroller is used to encode and identify the TTL encoded sequence and measure timing parameters, including the setup time width.

3. The offline detection system according to claim 2, characterized in that: The microcontroller of the fuze detection module uses a state machine approach to implement the encoding detection, including idle, synchronization, code reading, stop, start, and timing states; the base pulse width of the encoding signal of the fuze command is 5ms, and the transmission baud rate is 200bps.

4. The offline detection system according to claim 1, characterized in that: The primer detection unit includes several primer detection modules, and each primer detection module includes a load simulation circuit, an optocoupler isolation circuit, a waveform shaping circuit, and a microcontroller. The load simulation circuit includes a resistive element to simulate the resistive characteristics of the primer device and form a load for the primer trigger pulse. The optocoupler isolation circuit is used to convert the amplitude change of the primer trigger signal into the width change of the primer trigger pulse; The waveform shaping circuit is used to convert the isolated primer trigger pulse into a TTL pulse. The microcontroller measures the width of the TTL pulse using a pulse capture method to determine whether the primer trigger pulse energy is valid.

5. The offline detection system according to claim 1, characterized in that: The microcontroller of the display and control circuit is connected to the fuse detection unit and the primer detection unit via the I2C bus, and to the display screen via the RS485 bus; the output circuit includes an analog boost circuit and an analog transmission circuit, which send preset analog boost or analog transmission commands to the controlled device under test.

Images