Long-distance artillery firing data transmission circuit

Abstract

The utility model provides a long-distance artillery firing data transmission circuit which is used for collecting and transmitting artillery firing data and comprises a single chip microcomputer, a power module and an RS422 communication circuit. The single-chip microcomputer is connected with a weapon equipment output interface of a weapon system through a system data acquisition interface and used for acquiring the firing direction and firing angle of a certain type of antiaircraft gun and transmitting the firing direction and firing angle to an external computer through an RS422 communication circuit, and the single-chip microcomputer is powered through a power module. A reset circuit and a crystal oscillator circuit are arranged in the single-chip microcomputer and used for improving stability and consistency of data transmission. According to the utility model, long-distance effective communication can be carried out in an environment with electronic noise through the RS422 communication circuit, stable work of the single-chip microcomputer is realized through the reset circuit and the crystal oscillator circuit, stable and reliable transmission of shooting direction and shooting angle data of a certain type of antiaircraft gun is realized, and confusion and errors of data transmission are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of shooting training, in particular to a long-distance artillery shooting element transmission circuit. Background Art

[0002] Understanding battlefield situational awareness is a key commander's responsibility. However, the data transmission system on a certain self-propelled anti-aircraft artillery command vehicle only monitored the vehicle's location, but failed to effectively track its target. This hindered target allocation and coordination during battlefield command. During training, commanders also struggled to understand the tracking accuracy of their operators, hindering the ability to fully assess training performance.

[0003] With the development of modern combat systems, the requirements for real-time weapon assessments are becoming increasingly stringent. For example, high-precision simulation systems for weapon guidance, training, and performance assessment can simulate a wide range of battlefield environments and automatically detect weapon effectiveness indicators without firing a weapon. These systems can even further assess the accuracy of fire control system calculations, operator tracking precision, and weapon proficiency. Implementing these functions requires the real-time collection of critical weapon system data.

[0004] Since simulation systems for command, control, training, and performance evaluation of weapon systems require connection to weapon interfaces and long-distance transmission to obtain certain key data, traditional long-range artillery firing parameter transmission circuits have short transmission distances and lack the ability to collect artillery firing parameters. They also suffer from poor anti-interference capabilities, large size, and high power consumption, making them unable to meet the high-precision and stable angle measurement requirements of these simulation systems. The design of a new long-range artillery firing parameter transmission circuit should utilize advanced signal acquisition and communication transmission technologies to achieve high-precision measurement of artillery firing angles and directions, as well as stable long-distance output. Taking into full consideration the practicality and safety requirements of artillery systems, the new circuit design should not affect weapon performance or damage the original equipment structure, and should be easy to install and disassemble, have strong anti-interference capabilities, and prevent misoperation. This ensures that the normal operation of the artillery system is not affected, and misoperation or misfiring will not occur. Through the ingenious design of the transmission circuit for long-range artillery firing parameters, high-precision measurement of the artillery direction and angle can be achieved without affecting the operation of the artillery, and the data can be transmitted to the rear long-distance data platform via the RS422 interface. Utility Model Content

[0005] To solve the above problems, the utility model aims to propose a long-range artillery firing parameter transmission circuit to ensure that data can be transmitted over long distances and has anti-interference capabilities, and to ensure that systems such as guidance, training, performance evaluation, safe shooting, and prohibited shooting and aiming can be reliably evaluated, so as to enhance the credibility of weapon firing operations, detect problems in a timely manner, and ensure shooting safety.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0007] A long-range artillery firing parameter transmission circuit is used to collect and transmit artillery firing data. It includes a single-chip microcomputer, a power module, and an RS422 communication circuit. The single-chip microcomputer is connected to the weapon equipment output interface of the weapon system through a system data acquisition interface to collect the firing direction and angle of a certain type of anti-aircraft gun and transmit them to an external computer through the RS422 communication circuit. The single-chip microcomputer is powered by the power module. A reset circuit and a crystal oscillator circuit are provided in the single-chip microcomputer to improve the stability and consistency of data transmission.

[0008] Furthermore, the model of the single chip microcomputer is ARM7 series chip LPC2131.

[0009] Furthermore, the power supply module includes an LM2596T switching power supply and a low voltage difference analog power supply LDO chip SPX1117-3.3V. The input end of the LM2596T switching power supply is connected to the weapon backup power output port, and the output end of the LM2596T switching power supply is connected to the input end of the low voltage difference analog power supply LDO chip SPX1117-3.3V. The output end of the low voltage difference analog power supply LDO chip SPX1117-3.3V outputs 3.3V power for powering the microcontroller.

[0010] Furthermore, the model of the reset circuit is SP708S.

[0011] Furthermore, the crystal oscillator circuit is a crystal oscillator Y1, which is connected between the input terminal XTAL1 and the output terminal XTAL2 of the high-gain inverting amplifier inside LPC2131, and capacitors C101 and C102 are added between the Y1 pin and the ground to form an oscillation feedback circuit.

[0012] Furthermore, the model of the RS422 communication circuit is 75176.

[0013] Furthermore, the system data acquisition interface of the ARM7 series chip LPC2131 is compatible with the output interface of the weapon equipment.

[0014] Furthermore, the data transmission connection method between the system data acquisition interface of the ARM7 series chip LPC2131 and the weapon equipment output interface is: communication lines 1 and 3 are driven by LPC2131 to input into the weapon system, and the 8-bit data port line and communication line 2 are driven by the weapon system through the RS422 communication circuit to the external computer.

[0015] Beneficial Effects: The present invention enables efficient long-distance communication in an environment with electronic noise through the RS422 communication circuit. The reset circuit and crystal oscillator circuit ensure stable operation of the single-chip microcomputer, enabling stable and reliable transmission of the direction and angle data of a certain type of anti-aircraft gun, thus avoiding confusion and errors in data transmission. The circuit of the present invention is used to read the direction and angle data of a certain type of anti-aircraft gun from the port and transmit it to a rear data platform via the RS422 port. It can be used in simulation systems such as guidance, training, and performance evaluation, as well as in actual combat systems to obtain data such as the gun's firing status or direction through data analysis, thereby detecting weapon effectiveness indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a structural block diagram of the long-range artillery firing parameter transmission circuit according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the ARM7 series chip LPC2131 of the long-range artillery shooting parameter transmission circuit described in an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the LM2596T switching power supply of the long-range artillery shooting parameter transmission circuit described in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the low voltage difference analog power supply LDO chip SPX1117-3.3V of the long-range artillery shooting parameter transmission circuit described in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the reset circuit SP708S of the long-range artillery firing parameter transmission circuit according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of a crystal oscillator circuit for a long-range artillery firing element transmission circuit according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the RS422 communication circuit of the long-range artillery firing parameter transmission circuit described in an embodiment of the present utility model;

[0024] Figure 8 This is a schematic diagram of the system data acquisition interface of the ARM7 series chip LPC2131 of the long-range artillery shooting parameter transmission circuit described in an embodiment of the present utility model;

[0025] Figure 9 This is a working timing diagram of the system data acquisition interface of the long-range artillery shooting parameter transmission circuit described in an embodiment of the present utility model. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0028] Example 1

[0029] See also Figure 1-9 : A long-range artillery firing element transmission circuit is used to collect and transmit artillery firing data, including a single-chip microcomputer 1, a power module 2 and an RS422 communication circuit 3. The single-chip microcomputer 1 is connected to the weapon equipment output interface of the weapon system through the system data acquisition interface to collect the firing direction and angle of a certain type of anti-aircraft gun and transmit them to an external computer through the RS422 communication circuit 3. The single-chip microcomputer 1 is powered by the power module 2. A reset circuit 10 and a crystal oscillator circuit 11 are provided in the single-chip microcomputer 1 to improve the stability and consistency of data transmission.

[0030] This embodiment can carry out long-distance and efficient communication in an environment with electronic noise through the RS422 communication circuit, realize stable operation of the single-chip microcomputer through the reset circuit and the crystal oscillator circuit, and realize stable and reliable transmission of the firing direction and firing angle data of a certain type of anti-aircraft gun, avoiding confusion and errors in data transmission.

[0031] It should be noted that the circuit of this embodiment is used to read the artillery direction and angle data from a certain type of anti-aircraft gun port and transmit it to the rear data platform via the RS422 port. It can be used in simulation systems such as guidance, training, and performance evaluation, as well as in actual combat systems to obtain data such as artillery firing status or direction through data analysis and detect weapon effectiveness indicators.

[0032] In a specific example, the model of the single chip computer 1 is the ARM7 series chip LPC2131.

[0033] like Figure 2As shown, the CPU uses the ARM7 series chip LPC2131. This microcontroller is small in size, low in power consumption, has a 16 / 32-bit ARM7TDMI-S core, an ultra-small LQFP64 package, 8Kb of internal static RAM, 32Kb of on-chip FLASH program memory, and can achieve an operating frequency of up to 60mHz. It has in-system programming (ISP) and in-application programming (IAP), internal integrated A / D and D / A converters, a real-time clock (RTC), two standard UARTs, two high-speed I2C and SPI interfaces, and 47 bidirectional input / output I / O ports. It can operate using a single 3.3V power supply. During design, pins V3 and V3A are connected to 3.3V, GND is grounded, and VBat is left floating.

[0034] In a specific example, the power supply module 2 includes an LM2596T switching power supply and a low voltage difference analog power supply LDO chip SPX1117-3.3V. The input end of the LM2596T switching power supply is connected to the weapon backup power output port, and the output end of the LM2596T switching power supply is connected to the input end of the low voltage difference analog power supply LDO chip SPX1117-3.3V. The output end of the low voltage difference analog power supply LDO chip SPX1117-3.3V outputs a 3.3V power supply for powering the microcontroller 1.

[0035] like Figure 3 As shown, the LM2596T switching power supply's power port J1 draws operating power from the weapon's backup power output port. Given the weapon's 20-30V supply voltage, and considering the current consumption and volume requirements of this design's 5V power supply, a wide input power range switching power supply solution is employed. The LM2596T, a specialized switching power supply module manufactured by National Semiconductor, operates at a 150kHz frequency, outputs 5V, and 3A, achieving a power conversion efficiency of ≥80%, thermal shutdown, and output current limiting. A one-way diode D1 is added to the input to effectively prevent subsequent circuit damage caused by reversed input terminals. If the positive and negative input terminals are reversed, the power supply will cease operation. Input filter capacitors C1 and C2 are added to filter low-frequency and high-frequency voltage fluctuations, respectively. Zener diode D2 is added to the output to clamp the output voltage at 5V. After passing through inductor L1, a 5V DC voltage is output. This voltage is introduced into the LM2596's 4-pin feedback terminal. The output voltage is filtered by a 220uf capacitor C3 and a 0.1uf capacitor C4 to effectively ensure the stability of the 5V power supply. To prevent interference with other circuits during operation of the switching power supply, the power supply board is designed with separate wiring and installed separately from the acquisition board.

[0036] like Figure 4As shown, the LPC2131 uses a single 3.3V power supply. Since the 3.3V power supply consumes minimal power, the SPX1117-3.3V low-dropout analog power supply LDO chip was chosen. This power supply has a stable output current of 0.8A and a peak current of 1A, and features overcurrent and temperature protection. To prevent excessive input voltage from increasing chip heat and affecting performance, a 5V pre-amplifier power supply was selected, fully meeting the SPX1117-3.3V requirements. Capacitors C9-C13, all 0.1uF, are used for input decoupling of the LPC2131's power pins.

[0037] In a specific example, the reset circuit 10 is model SP708S.

[0038] like Figure 5 As shown in the figure, the operating voltage of LPC2131 is 3.0-3.6V, and the reset threshold should be selected as 2.93V. In order to effectively enhance the reliability and work efficiency of the system, we use the microcontroller dedicated reset chip SP708S for the reset circuit. This chip can provide a reset pulse width of 200ms and supports manual reset input. When VCC drops to 1V, a reset signal is generated. The WDI pin can be kept floating and the watchdog function has been disabled.

[0039] This embodiment uses two methods: power-on automatic reset and key-level reset. After the system is powered on, as long as the rise time of the power supply VCC does not exceed 1ms, power-on automatic reset can be achieved. Key-level reset is used to reinitialize the system without power failure. Connect the SW2 button between the MR pin of the SP706 and ground. When the button is pressed, the RST pin is at a low level. When released, the RST pin is guaranteed to generate a reset level. During use, to facilitate system reset operations, SW2 is designed as a dual-button parallel connection: one is on the circuit board and uses a standard surface-mount button, and the other is connected in parallel to the operation panel. This allows for convenient system resets during both the program debugging phase and during operation.

[0040] The LPC2000 series processors have a built-in JTAG debug interface. Connecting a 10K pull-up resistor to the P0.14 pin disables the ISP function after power-up. Installing SW1 between P0.14 and ground and pressing SW1 before pressing SW2 enables the chip's ISP function, facilitating program downloads.

[0041] In a specific example, the crystal oscillator circuit 11 is a crystal oscillator Y1, which is connected between the input terminal XTAL1 and the output terminal XTAL2 of the high-gain inverting amplifier inside LPC2131, and capacitors C101 and C102 are connected between the Y1 pin and the ground to form an oscillation feedback circuit.

[0042] It should be noted that in order to facilitate the baud rate adjustment with the back-end communication circuit, without affecting the stability of the oscillator and the rapidity of oscillation, such as Figure 6 As shown: We use an 11.4688MHz crystal oscillator for Y1 in this design, and select 30pF for C101 and C102. When designing the circuit board, place the crystal oscillator Y1 and capacitors C101 and C102 as close to the XTAL1 and XTAL2 pins of the LPC2131 chip as possible to reduce distributed capacitance and fully ensure the stability of the crystal oscillator.

[0043] In a specific example, the model of the RS422 communication circuit 3 is 75176.

[0044] like Figure 7 As shown, the system communication circuit design utilizes the 75176 chip. The 75176 chip is a common RS-485 / RS-422 transceiver, capable of efficient long-distance communication in environments with electronic noise. The baud rate reaches 100 kbit / s at 1200 m, and high-voltage differential balanced transmission can be achieved using twisted-pair cables. This embodiment utilizes half-duplex bidirectional communication. When the LPC2131 controls pin P05 to output 0, the 75176 is placed in the receive state. When P05 outputs 1, the 75176 is placed in the transmit state. To ensure communication reliability, three resistors, R11-R13, are connected between the 75176's communication terminals, INL and INH, for voltage clamping. Each resistor has a value of 5.1K, which provides immunity to synchronous communication interference.

[0045] In a specific example, the system data acquisition interface of the ARM7 series chip LPC2131 is adapted to the weapon output interface.

[0046] like Figure 8 As shown, since this design is used to collect the firing direction and angle of a certain type of anti-aircraft gun, the circuit design and the weapon system interface must use the same type of connection port as the equipment. The specific model of port J3 can be found in the weapon system output interface. Since not all 41 pins of the original equipment interface are used, the interface circuit diagram only shows the pins related to data collection in this design, leaving unused pins floating. Data collection is performed by port P1 of the LPC2131. When using it, please ensure that it complies with the communication conventions of the weapon system.

[0047] In a specific example, Figure 9 The following is the working sequence diagram of the system data acquisition interface; see Figure 9It can be seen that the data transmission connection method between the system data acquisition interface of the ARM7 series chip LPC2131 and the weapon equipment output interface is: communication lines 1 and 3 are driven by LPC2131 to input into the weapon system, and the 8-bit data port line and communication line 2 are driven by the weapon system through the RS422 communication circuit 3 to the external computer.

[0048] The working principle of this embodiment is as follows: Before communication, the external computer LPC2131 sets tie line 1 high, sets the 8-bit data port and tie line 2 to input states, and sets tie line 3 to low. When data transmission is required, the LPC2131 first generates a low-level pulse via tie line 1 to the weapon system. Upon receiving this signal, the weapon system outputs the first byte of data to the 8-bit data port and sets tie line 2 to a rising high level. At this point, the external computer removes the low-level signal from tie line 1, and both parties continue communicating via parallel port until all bytes are transmitted.

[0049] The LPC2131 extracts the direction and angle data from the received data stream to obtain real-time information about the gun's barrel direction. The collected direction and angle data is sent via UART0 and transmitted to the rear data platform via the RS422 interface.

[0050] This embodiment has the following technical advantages: the artillery direction and angle acquisition circuit of this embodiment achieves high-precision measurement and stable output of the artillery direction of a certain type of anti-aircraft gun, and can transmit it to the rear data platform in real time over long distances according to design requirements. This embodiment fully considers the practicality and safety requirements of the artillery system and does not affect the original function of the artillery. At the same time, the new circuit design has the characteristics of strong anti-interference ability and prevention of misoperation, does not damage the original equipment structure, is easy to install, and is easy to disassemble and assemble. This embodiment can be used for high-precision guidance, training, performance evaluation and other simulation systems to automatically detect the combat effectiveness of weapons, assess the solution accuracy of the fire control system, the operator's weapon proficiency, etc. This embodiment facilitates other related circuits to intelligently control the artillery through the real-time artillery direction and angle data, such as ensuring the reliable implementation of safe shooting areas and aiming at prohibited areas, so as to protect the safety of combat personnel and equipment.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A long-distance artillery shooting element transmission circuit, characterized in that: The device is used for collecting and transmitting artillery firing data, comprising a single chip microcomputer (1), a power module (2) and an RS422 communication circuit (3); the single chip microcomputer (1) is connected to a weapon equipment output interface of a weapon system through a system data acquisition interface and is used for collecting the firing direction and firing angle of a certain type of anti-aircraft gun and transmitting the collected data to an external computer through the RS422 communication circuit (3); the single chip microcomputer (1) is powered by the power module (2); a reset circuit (10) and a crystal oscillator circuit (11) are provided in the single chip microcomputer (1) and are used for improving the stability and consistency of data transmission.

2. The long-distance artillery shooting element transmission circuit according to claim 1 is characterized in that: The model of the single chip computer (1) is the ARM7 series chip LPC2131.

3. The long-distance artillery shooting element transmission circuit according to claim 2 is characterized in that: The power supply module (2) comprises an LM2596T switching power supply and a low voltage difference analog power supply LDO chip SPX1117-3.3V, the input end of the LM2596T switching power supply is connected to the weapon backup power supply output port, the output end of the LM2596T switching power supply is connected to the input end of the low voltage difference analog power supply LDO chip SPX1117-3.3V, and the output end of the low voltage difference analog power supply LDO chip SPX1117-3.3V outputs a 3.3V power supply for powering the single-chip computer (1).

4. The long-distance artillery shooting element transmission circuit according to claim 2 is characterized in that: The model of the reset circuit (10) is SP708S.

5. The long-distance artillery shooting element transmission circuit according to claim 2 is characterized in that: The crystal oscillator circuit (11) is a crystal oscillator Y1, which is connected between the input terminal XTAL1 and the output terminal XTAL2 of the high-gain inverting amplifier inside LPC2131, and capacitors C101 and C102 are added between the Y1 pin and the ground to form an oscillation feedback circuit.

6. The long-distance artillery shooting element transmission circuit according to claim 2 is characterized in that: The model of the RS422 communication circuit (3) is 75176.

7. The long-distance artillery shooting element transmission circuit according to claim 2 is characterized in that: The system data acquisition interface of the ARM7 series chip LPC2131 is compatible with the weapon equipment output interface.

8. The long-distance artillery shooting element transmission circuit according to claim 2 is characterized in that: The data transmission connection mode between the system data acquisition interface of the ARM7 series chip LPC2131 and the output interface of the weapon equipment is as follows: the communication lines 1 and 3 are driven by the LPC2131 to be input into the weapon system, and the 8-bit data port line and the communication line 2 are driven by the weapon system to the external computer through the RS422 communication circuit (3).

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