Signal detection device of television goniometer

Abstract

The utility model discloses a signal detection device of a television goniometer, which belongs to the field of signal detection, and comprises a signal processing module and an RS232 to USB communication module which are connected in sequence, the signal processing module comprises a first main control chip, the first main control chip is connected with an isolation optocoupler, an oscilloscope, a crystal oscillator and a power supply isolation unit, the power supply isolation unit is used for isolating interference of a power supply on a detection signal, and the isolation optocoupler is used for performing isolation coupling on the detection signal; and the RS232 to USB communication module comprises a second main control chip, and the second main control chip is connected with the first main control chip. According to the device, the interference of the detection end on the detection signal is avoided through the isolation optocoupler and the power supply isolation unit, and the accuracy of obtaining the feedback signal of the television goniometer is ensured.

Description

Technical Field

[0001] The utility model relates to the field of signal detection, in particular to a signal detection device for a television goniometer. Background Art

[0002] The TV goniometer is a core component of the control system in anti-tank missile weapon systems. It measures the missile's angular deviation from the line of sight, allowing the shooter to observe and aim at the target. It generates a self-test signal, which, in conjunction with the control box, enables self-tests of ground control equipment. Typically, a signal detector intercepts the return signal from the TV goniometer's feedback signal line, decodes it, and then transmits it to obtain the self-test signal. However, existing signal detectors are susceptible to high voltage at the detection end when acquiring the TV goniometer's feedback signal, damaging the low-voltage module and resulting in inaccurate feedback signals. This hinders target signal analysis and TV goniometer fault detection. Utility Model Content

[0003] The purpose of the utility model is to overcome the technical problems existing in the prior art and provide a signal detection device for a television goniometer.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] Provided is a signal detection device for a television goniometer, comprising a signal processing module and an RS232-to-USB communication module connected in sequence. The signal processing module includes a first main control chip, to which is connected an isolation optocoupler, an oscilloscope, a crystal oscillator, and a power isolation unit, wherein the power isolation unit is used to isolate interference of the power supply on the detection signal, and the isolation optocoupler is used to isolate and couple the detection signal. The RS232-to-USB communication module includes a second main control chip, which is connected to the first main control chip.

[0006] In some embodiments, a voltage stabilizing circuit is connected to the second main control chip.

[0007] In some embodiments, the voltage stabilizing circuit includes a voltage stabilizing chip, and the model of the voltage stabilizing chip is A1117.

[0008] In some embodiments, the model of the first main control chip is GD32F407RET6.

[0009] In some embodiments, the first main control chip is provided with multiple interfaces.

[0010] In some embodiments, the isolation optocoupler has a model number of HCPL-063L-500E.

[0011] In some embodiments, the crystal oscillator is of model SG-3031CM.

[0012] In some embodiments, the power isolation unit includes a power isolation chip, and the model of the power isolation chip is B0505D-1WR2.

[0013] In some embodiments, the model of the second main control chip is FT232RL.

[0014] It should be further explained that the technical features corresponding to the above options can be combined or replaced with each other to form a new technical solution.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The utility model isolates the interference of the power supply on the detection signal through the power isolation unit, isolates the potential of the detection signal, prevents the high voltage of the detection end from damaging the low voltage module, and isolates and couples the detection signal through the isolation optical coupler to ensure the accuracy of the feedback signal acquisition of the television goniometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings. The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The same reference numerals are used in these drawings to represent the same or similar parts. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0018] Figure 1 This is a framework diagram of a signal detection device for a television goniometer shown in an embodiment of the present utility model;

[0019] Figure 2 A circuit diagram of a signal processing module according to an embodiment of the present invention;

[0020] Figure 3 This is a circuit diagram of an RS232 to USB communication module according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of feedback signal decoding data shown in an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the return signal from the main control chip shown in an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of decoding a host control signal according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model in specific contexts.

[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Reference Figure 1 In an exemplary embodiment, a signal detection device for a television goniometer is provided, comprising a signal processing module and an RS232-to-USB communication module connected in sequence. The signal processing module includes a first main control chip, to which is connected an isolation optocoupler, an oscilloscope, a crystal oscillator, and a power isolation unit, wherein the power isolation unit is used to isolate interference from the power supply on the detection signal, and the isolation optocoupler is used to isolate and couple the detection signal. The RS232-to-USB communication module includes a second main control chip, which is connected to the first main control chip.

[0028] Specifically, the signal detector is mainly composed of two parts. The first is the signal processing module, whose main function is to intercept the return signal from the feedback signal line of the goniometer, decode and process it, and then send it out. The second is the RS232 to USB communication module, whose main function is to convert the TTL serial port signal sent by the signal processing module into a USB signal to facilitate communication with the host computer.

[0029] Furthermore, the model of the first main control chip is GD32F407RET6. It is a single-chip microcontroller based on the ARM Cortex-M4 core from GigaDevice. It is mainly used in embedded systems that require high-performance processing and low power consumption. It has an operating frequency of up to 120MHz, 1024KB Flash, 256KB SRAM, and multiple peripheral interfaces such as SPI, I2C, and USART. The 64-pin LQFP64 version is used in this design. The power isolation unit includes a power isolation chip, the model of which is B0505D-1WR2, and the model of the isolation optocoupler is HCPL-063L-500E. The model of the second main control chip is FT232RL.

[0030] The specific circuit of the signal processing module is as follows Figure 2 As shown, in this device, the detection signal is isolated and coupled through the HCPL-063L-500E optocoupler. The B0505D-1WR2 is used as an isolated power supply to isolate the detection signal and prevent the high voltage at the detection end from damaging the low-voltage module. The optocoupler is powered by the 5V power supply on the board, and the output end is connected to the PC11 pin of the GD32F407RET6. This pin is the receiving end (RX) of the UART3 of the first main control chip. The feedback line signal waveform is captured by an oscilloscope, and the narrowest pulse width of the signal is measured to be approximately 8.68 microseconds. By calculating, its communication baud rate can be obtained to be 115200bps. The signal line feedback signal can be measured by decoding the signal with an oscilloscope, as shown in the figure. Figure 4 As shown. After testing, it was found that the first and second bytes of the 11-byte feedback signal are the low and high bits of the Y axis respectively, the third and fourth bytes are the low and high bits of the X axis, and the remaining bits are machine status, instructions and other data. The collected feedback signal is input to the first main control chip through the PC11 pin, and then processed to generate 12-bit return data, which is transmitted to the RS232 to USB communication module through the PB10 pin (USART2_RX) and connected to the RXDX pin of the FT232RL chip (see Figure 3 ), which is converted into USB signal by the chip and sent back to the host computer for further processing and analysis (see the return signal Figure 5 ), the 4th and 5th bytes in the 12-byte signal are the low and high bits of the Y axis respectively, and the 7th and 8th bytes are the low and high bits of the X axis respectively.

[0031] In order to realize direct testing through the host computer, the design converts the host computer signal into RS232 signal through the RS232 to USB communication module, connects the TXD pin of the FT232RL chip to the PB10 pin (USART2_TX) of the GD32F407RET6, sends the control signal to the main control chip, and connects to the host through the PC6 pin (USART5_TX) to control the host (see the detection signal Figure 6 ), and the host also communicates with the host computer by connecting to the PC7 pin (USART5_RX) of the main control chip, as shown in the figure, which is a 5-byte control signal.

[0032] Further, if Figure 3 As shown, the second main control chip is connected to a voltage stabilization circuit. The voltage stabilization circuit includes a voltage stabilization chip, model A1117. The AMS1117 is a positive low-dropout voltage regulator with a voltage drop of 1.2V at 1A current. The AMS1117 comes in two versions: a fixed output version and an adjustable version. The fixed output voltages of 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, and 5.0V have an accuracy of 1%; the fixed output voltage of 1.2V has an accuracy of 2%. This application uses the AMS1117-3.3.

[0033] Further, Figure 3 VCCIO is used for the voltage on the FPGA's IO module (same as the IO pin). This voltage should match the voltage of other devices connected to the FPGA.

[0034] The above specific implementation methods are detailed descriptions of the present invention. It cannot be determined that the specific implementation methods of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions and substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A signal detection device for a television goniometer, characterized in that: It includes a signal processing module and an RS232 to USB communication module connected in sequence, the signal processing module includes a first main control chip, the first main control chip is connected to an isolation optocoupler, an oscilloscope, a crystal oscillator and a power isolation unit, wherein the power isolation unit is used to isolate the interference of the power supply on the detection signal, and the isolation optocoupler is used to isolate and couple the detection signal; the RS232 to USB communication module includes a second main control chip, and the second main control chip is connected to the first main control chip.

2. The signal detection device of a television goniometer according to claim 1, characterized in that: The second main control chip is connected to a voltage stabilizing circuit.

3. The signal detection device of a television goniometer according to claim 2, characterized in that: The voltage stabilizing circuit includes a voltage stabilizing chip, and the model of the voltage stabilizing chip is A1117.

4. The signal detection device for a television goniometer according to claim 1, characterized in that: The model of the first main control chip is GD32F407RET6.

5. The signal detection device for a television goniometer according to claim 4, characterized in that: The first main control chip is provided with a variety of external interfaces.

6. The signal detection device for a television goniometer according to claim 1, characterized in that: The model of the isolation optocoupler is HCPL-063L-500E.

7. The signal detection device for a television goniometer according to claim 1, characterized in that: The model of the crystal oscillator is SG-3031CM.

8. The signal detection device for a television goniometer according to claim 1, characterized in that: The power isolation unit includes a power isolation chip, and the model of the power isolation chip is B0505D-1WR2.

9. The signal detection device for a television goniometer according to claim 1, characterized in that: The model of the second main control chip is FT232RL.

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