Artillery azimuth firing range steering limiting circuit

Abstract

The utility model discloses an artillery azimuth firing range steering limiting circuit which comprises a single chip microcomputer, a power panel, a data acquisition board, a storage circuit and a steering circuit. The data acquisition board is connected to an input pin of the single-chip microcomputer, the storage circuit is connected to the input pin of the single-chip microcomputer, the steering circuit is connected to an output pin of the single-chip microcomputer, and the power board is connected to a power pin of the single-chip microcomputer. A power supply circuit is arranged on the power supply board, a unilateral diode is added to the input end of the power supply circuit, circuit burning caused by reverse connection of the positive electrode and the negative electrode of the power supply input end can be effectively prevented, and the power supply stops working once the positive electrode pin and the negative electrode pin of the power supply input end are connected reversely. And the output end of the power supply circuit is filtered by using the capacitor, so that output voltage ripples can be effectively reduced, the output stability of the power supply is ensured, and the anti-interference performance of the whole circuit is further improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit design technology, specifically to a gun azimuth firing range turning restriction circuit. Background Technology

[0002] Modern artillery is mounted on various platforms, such as armored vehicles, tanks, and ships. When firing artillery, it is essential to accurately aim the gun and control its azimuth and firing arc to ensure safe firing and prevent accidents. The design of the artillery azimuth and firing arc limiting circuit must fully consider the safety requirements of the artillery system, must not affect the original functions of the artillery, and the circuit design should have strong anti-interference capabilities and prevent misoperation, thereby ensuring the safety of personnel and equipment. Utility Model Content

[0003] The technical problem to be solved by this invention is how to improve the anti-interference capability of the artillery azimuth firing range turning restriction circuit.

[0004] This utility model solves the above-mentioned technical problems through the following technical means:

[0005] This utility model proposes a gun azimuth firing range steering limiting circuit. The circuit includes a microcontroller, a power board, a reset circuit, a crystal oscillator circuit, a data acquisition board, a storage circuit, and a steering circuit. The reset circuit is connected to the reset pin of the microcontroller, the crystal oscillator circuit is connected to the external crystal oscillator pin of the microcontroller, the data acquisition board is connected to the input pin of the microcontroller, the storage circuit is connected to the input pin of the microcontroller, the steering circuit is connected to the output pin of the microcontroller, and the power board is connected to the power supply pin of the microcontroller.

[0006] The power board includes a switching voltage regulator. Capacitors C1 and C2 are connected in parallel between the input pin and the ground pin of the switching voltage regulator. A diode D1 is connected to both ends of capacitor C1. One end of inductor L1 is connected to the cathode of diode D2 and then connected to the output pin of the switching voltage regulator. A capacitor C3 is connected between the other end of inductor L1 and the anode of diode D2. The positive terminal of capacitor C3 is connected to the feedback pin of the switching voltage regulator. A capacitor C4 is connected in parallel with capacitor C3.

[0007] Furthermore, the power board is wired with a power circuit, the data acquisition board is wired with an angle acquisition interface, and the power board and the data acquisition board are installed in isolation.

[0008] Furthermore, the reset pin of the microcontroller is connected to a reset circuit, which includes a capacitor C100 and a resistor R100. One end of the capacitor C100 is connected to one end of the resistor R100. The button SW1 is connected in parallel across the two ends of the capacitor C100 and grounded through the resistor R100. One end of the resistor R100 is connected to the reset pin of the microcontroller.

[0009] Furthermore, the microcontroller's external crystal oscillator pin is connected to a crystal oscillator circuit, which includes a crystal oscillator Y1. The crystal oscillator Y1 is connected across the crystal input pin XTAL1 and the crystal output pin XTAL2 of the microcontroller's internal high-gain inverting amplifier. Capacitors C101 and C102 are connected between the crystal oscillator Y1 pin and ground to form an oscillation feedback circuit. The crystal oscillator circuit is arranged close to pins XTAL1 and XTAL2.

[0010] Furthermore, the crystal oscillator Y1 uses an 11.0592MHz crystal oscillator, and the capacitance values ​​of capacitors C101 and C102 are 30pF.

[0011] Furthermore, the angle acquisition interface includes communication line 1, communication line 2, communication line 3 and data port line. Communication line 1 and communication line 3 are driven by the microcontroller to input into the weapon system, and data port line and communication line 2 are driven by the weapon system to output to the microcontroller.

[0012] Furthermore, the storage circuit includes an AT24C16 memory chip, and the SCL and SDA pins of the AT24C16 memory chip are connected to the input pins P11 and P12 of the microcontroller.

[0013] Furthermore, the steering circuit includes switches K4 and K5. One end of switch K4 is connected to pin P26 of the microcontroller, one end of switch K5 is connected to pin P27 of the microcontroller, and the other ends of switches K4 and K5 are connected to the artillery azimuth steering control signal.

[0014] The advantages of this utility model are:

[0015] (1) In the artillery azimuth firing range turning limit circuit set in this utility model, a unidirectional diode D1 is added to the input end of the power supply circuit, which can effectively prevent the circuit from burning out due to the reverse connection of the positive and negative terminals of the power supply input terminal. Once the positive and negative terminals of the power supply input terminal are reversed, the power supply will stop working. The output end of the power supply circuit is filtered by a 220uF capacitor C3 and a 0.1uF capacitor C4, which can effectively reduce the output voltage ripple, ensure the stable output of the 5V power supply, and further improve the anti-interference performance of the entire circuit.

[0016] (2) The power board and the data acquisition board are designed with separate wiring, and the power board and the data acquisition board are installed in isolation to prevent the switching power supply from interfering with other circuits when it is working, thereby improving the anti-interference capability of the entire circuit.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the power supply circuit in one embodiment of the present invention;

[0019] Figure 2 This is a pin diagram of the microcontroller in one embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the reset circuit in one embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the crystal oscillator circuit in one embodiment of the present invention;

[0022] Figure 5 This is a design drawing of the angle acquisition interface in one embodiment of this utility model;

[0023] Figure 6 This is a timing diagram of angle acquisition in one embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the storage circuit in one embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the steering circuit in one embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] like Figures 1 to 2The present invention provides an embodiment of a gun azimuth firing range turning limiting circuit, the circuit including a microcontroller, a power supply board, a data acquisition board, a storage circuit and a turning circuit; the data acquisition board is connected to the input pin of the microcontroller, the storage circuit is connected to the input pin of the microcontroller, the turning circuit is connected to the output pin of the microcontroller, and the power supply board is connected to the power supply pin of the microcontroller;

[0028] The power board includes a switching voltage regulator. Capacitors C1 and C2 are connected in parallel between the input pin 1 and the ground pin 3 of the switching voltage regulator. A diode D1 is connected to both ends of capacitor C1. One end of inductor L1 is connected to the cathode of diode D2 and then connected to the output pin 2 of the switching voltage regulator. A capacitor C3 is connected between the other end of inductor L1 and the anode of diode D2. The positive terminal of capacitor C3 is connected to the feedback pin FB4 of the switching voltage regulator. A capacitor C4 is connected in parallel with capacitor C3.

[0029] It should be noted that in this embodiment, a data acquisition board is set up to acquire the angle of the artillery, a power supply board is set up to provide a stable power supply for the entire circuit, and a steering circuit is used to cut off the steering after the artillery enters the no-fire zone, so that the artillery stops rotating and completes the steering restriction, realizing the function of manually inputting the steering restriction of the firing range; and in the artillery azimuth firing range steering restriction circuit, the power supply board and the data acquisition board are designed with separate wiring, and the power supply board and the data acquisition board are installed in isolation to prevent interference to other circuits when the switching power supply is working, thereby improving the anti-interference capability of the entire circuit.

[0030] In this embodiment, power port J1 is used to obtain operating power from the weapon's backup power output port, which is then converted by the power circuit to generate a 5V operating power supply. The power circuit uses a dedicated module LM2596 manufactured by National Semiconductor. A unidirectional diode D1 is added to its input terminal to effectively prevent circuit burnout caused by reversed positive and negative connections at the power input terminal. If the positive and negative pins at the power input terminal are reversed, the power supply stops working. Furthermore, a 220uF capacitor C3 and a 0.1uF capacitor C4 are used for filtering at the output terminal of the power circuit, which effectively reduces output voltage ripple, ensures stable 5V power output, and further improves the overall circuit's anti-interference capability.

[0031] In this embodiment, the microcontroller specifically selected is the MCS-51 series 80C52 microcontroller. This microcontroller is small in size, low in power consumption, and has an 8Kb program memory, an 8-bit central processing unit, 256 bytes of internal RAM, 8Kb of program memory (ROM), 32 bidirectional input / output (I / O) ports, three 16-bit timer / counters, five two-level interrupt structures, one UART full-duplex serial communication port, and an on-chip clock oscillation circuit. In the design, the VCC pin is connected to 5V, and GND is grounded.

[0032] In one embodiment, the power board is wired with a power circuit, the data acquisition board is wired with an angle acquisition interface, and the power board and the data acquisition board are installed in isolation.

[0033] It should be noted that by designing separate wiring for both the power supply board and the data acquisition board, and by installing the power supply board and the data acquisition board in isolation, interference to other circuits is prevented when the switching power supply is working, thus improving the overall circuit's anti-interference capability.

[0034] In one embodiment, such as Figure 3 As shown, the reset pin of the microcontroller is connected to a reset circuit, which includes a capacitor C100 and a resistor R100. One end of the capacitor C100 is connected to one end of the resistor R100. The button SW1 is connected in parallel across the two ends of the capacitor C100 and grounded through the resistor R100. One end of the resistor R100 is connected to the reset RST pin of the microcontroller.

[0035] The reset circuit in this embodiment employs two methods: automatic power-on reset and key-level reset. Given that the 89C52's reset signal input pin RST (pin 1) is active high, and the required duration is at least 24 oscillation pulse cycles, Figure 4 The capacitor C100 is selected as 10uF, and the resistor R100 is 10KΩ. After the system is powered on, as long as the rise time of the power supply VCC does not exceed 1ms, automatic power-on reset can be achieved. The button-level reset is used to reinitialize the system without power interruption. Button SW1 is connected in parallel across capacitor C100, and then to ground via resistor R100. When the button is pressed, the RST pin is at a high level. After releasing the button, the VCC power supply charges capacitor C100 through resistor R100, ensuring that the high-level time of the RST pin is greater than 24 oscillation cycles. To facilitate system reset, SW1 is designed as a dual-button parallel connection: one is on the circuit board using a standard surface-mount button, and the other is connected in parallel to the operation panel. This allows for convenient system reset during both program debugging and operation.

[0036] In one embodiment, such as Figure 4 As shown, the microcontroller's external crystal oscillator pin is connected to a crystal oscillator circuit, which includes a crystal oscillator Y1. The crystal oscillator Y1 is connected across the crystal input pin XTAL1 and the crystal output pin XTAL2 of the microcontroller's internal high-gain inverting amplifier. Capacitors C101 and C102 are connected between the crystal oscillator Y1 pin and ground to form an oscillation feedback circuit. The crystal oscillator circuit is arranged close to pins XTAL1 and XTAL2.

[0037] It should be noted that in this embodiment, a crystal oscillator Y1 is connected between the input terminal XTAL1 and the output terminal XTAL2 of the high-gain inverting amplifier inside the 89C52 microcontroller, and capacitors C101 and C102 are connected between the pins of the crystal oscillator Y1 and ground to form an oscillation feedback circuit. Specifically, the crystal oscillator Y1 is a 16MHz crystal oscillator, and C101 and C102 are selected as 30pF. When designing the circuit board, the crystal oscillator Y1 and capacitors C101 and C102 are placed as close as possible to the XTAL1 and XTAL2 pins of the 89C2051 chip to reduce distributed capacitance and fully ensure the stability of the crystal oscillator operation.

[0038] In one embodiment, such as Figures 5 to 6 As shown, the angle acquisition interface includes communication line 1, communication line 2, communication line 3 and data port line. Communication line 1 and communication line 3 are driven by the microcontroller to input into the weapon system, and data port line and communication line 2 are driven by the weapon system to output to the microcontroller.

[0039] This embodiment features an angle acquisition interface on the data acquisition board for acquiring the azimuth and elevation angles of a certain type of anti-aircraft gun. Therefore, the interface design with the weapon system uses a connection port of the same model as the equipment. The specific model of the wiring port J3 can be found in the weapon equipment output interface. Since not all 41 pins of the original equipment interface were used, therefore... Figure 7 The data acquisition interface design circuit shown only shows the pin connections related to data acquisition in this design; unused pins are left floating.

[0040] This embodiment provides an implementation process as follows: Connect the J1 interface to the weapon's backup power supply port and the J3 interface to the artillery's data acquisition port. Before communication, the microcontroller sets communication line 1 to a high level, sets the 8-bit data port and communication line 2 to input, and communication line 3 to a low level. When data transmission is needed, the microcontroller generates a low-level pulse to the weapon system via communication line 1. Upon receiving this signal, the weapon system outputs the first byte of data to the 8-bit data port and sets the level of communication line 2 to a high level (rising edge). At this time, the external computer can remove the low-level signal from communication line 1. Then, both parties communicate using parallel port mode until all bytes have been transmitted.

[0041] It should be understood that the angle data of the artillery in this embodiment can also be collected in other ways, such as setting the angle sensor as a dual-axis angle sensor to measure the firing angle of the artillery. This embodiment does not make specific limitations on this.

[0042] In one embodiment, such as Figure 7As shown, the input pins of the microcontroller are connected to a storage circuit, which includes an AT24C16 memory chip. The SCL and SDA pins of the AT24C16 memory chip are connected to the input pins P11 and P12 of the microcontroller.

[0043] It should be noted that the AT24C16 operates at low and standard voltages (Vcc = 1.8V - 5.5V). The chip has 2048x8 (16k) of internal memory space for storing the azimuth limit values ​​that need to be input before firing.

[0044] In one embodiment, such as Figure 8 As shown, the steering circuit includes switch K4 and switch K5. One end of switch K4 is connected to pin P26 of the microcontroller, and one end of switch K5 is connected to pin P27 of the microcontroller. The other ends of switch K4 and switch K5 are connected to the artillery azimuth steering control signal.

[0045] After the artillery enters the no-fire zone, if the artillery moves to the left beyond the firing range, K4 is cut off; if the artillery moves to the right beyond the firing range, K5 is cut off, and the artillery stops rotating, thus completing the turning restriction.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] 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. A gun azimuth firing range steering limiting circuit, characterized in that: The circuit includes a single-chip microcomputer, a power board, a data acquisition board, a storage circuit and a steering circuit; the data acquisition board is connected to the input pin of the single-chip microcomputer, the storage circuit is connected to the input pin of the single-chip microcomputer, the steering circuit is connected to the output pin of the single-chip microcomputer, and the power board is connected to the power pin of the single-chip microcomputer; The power board includes a switching voltage regulator, capacitors C1 and C2 are connected in parallel and connected between the input pin and the ground pin of the switching voltage regulator, and diode D1 is connected at both ends of the capacitor C1; one end of the inductor L1 is connected to the cathode of the diode D2 and then connected to the output pin of the switching voltage regulator, a capacitor C3 is connected between the other end of the inductor L1 and the anode of the diode D2, the positive electrode of the capacitor C3 is connected to the feedback pin of the switching voltage regulator, and the capacitor C3 is connected in parallel with a capacitor C4.

2. The artillery azimuth firing range steering limiting circuit as claimed in claim 1, characterized in that: The power board is wired with a power circuit, the data acquisition board is wired with an angle acquisition interface, and the power board is installed separately from the data acquisition board.

3. The artillery azimuth firing range steering limiting circuit as claimed in claim 1, characterized in that: The reset pin of the single-chip microcomputer is connected to a reset circuit, which includes a capacitor C100 and a resistor R100. One end of the capacitor C100 is connected to one end of the resistor R100. The button SW1 is connected in parallel to both ends of the capacitor C100 and grounded through the resistor R100. One end of the resistor R100 is connected to the reset pin of the single-chip microcomputer.

4. The artillery azimuth firing range steering limiting circuit as claimed in claim 1, characterized in that: The external crystal oscillator pin of the single-chip microcomputer is connected to a crystal oscillator circuit, which includes a crystal oscillator Y1. The crystal oscillator Y1 is bridged between the crystal oscillator input pin XTAL1 and the crystal oscillator output pin XTAL2 of the internal high-gain inverting amplifier of the single-chip microcomputer. Capacitors C101 and C102 are connected between the crystal oscillator Y1 pin and the ground to form an oscillation feedback circuit. The crystal oscillator circuit is arranged close to pins XTAL1 and XTAL2.

5. The artillery azimuth firing range steering limiting circuit as claimed in claim 4, characterized in that: The crystal oscillator Y1 uses a 11.0592 MHz crystal oscillator, and the capacitance value of the capacitor C101 and the capacitor C102 is 30 pF.

6. The artillery azimuth firing range steering limiting circuit as claimed in claim 2, characterized in that: The angle acquisition interface includes communication line 1, communication line 2, communication line 3 and data port line. Communication line 1 and communication line 3 are driven by the single chip microcomputer to input into the weapon system, and the data port line and communication line 2 are driven by the weapon system to output to the single chip microcomputer.

7. The artillery azimuth firing range steering limiting circuit as claimed in claim 1, characterized in that: The storage circuit comprises an AT24C16 storage chip, and the SCL pin and the SDA pin of the AT24C16 storage chip are connected to the input pins P11 and P12 of the single chip microcomputer.

8. The artillery azimuth firing range steering limiting circuit as claimed in claim 1, characterized in that: The steering circuit includes a switch K4 and a switch K5, one end of the switch K4 is connected to the P26 pin of the single-chip microcomputer, one end of the switch K5 is connected to the P27 pin of the single-chip microcomputer, and the other end of the switch K4 and the other end of the switch K5 are connected to the artillery azimuth steering control signal.

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