A multi-channel fiber-optic gyroscope wide-temperature data acquisition system and a working method thereof

Abstract

The application relates to a multi-channel fiber-optic gyroscope wide-temperature data acquisition system and a working method thereof. The system comprises an acquisition device arranged in a temperature box. The acquisition device comprises a turntable, a support seat is arranged on the turntable, an outer shell is connected to the support seat, a power control board, an ARM communication board and an FPGA main acquisition board are arranged in the outer shell, a plurality of connector fixing jacks for adapting to fiber-optic gyroscope interfaces are arranged on the outer shell, a heating film is attached to the inner wall of the outer shell, the FPGA main acquisition board is connected to the fiber-optic gyroscope through the connector fixing jacks, the FPGA main acquisition board is in communication connection with an upper computer through the ARM communication board, so that the fiber-optic gyroscope data can be wirelessly transmitted to the upper computer, and the power control board is used for realizing main power control and voltage protection, main current detection, heating film control and temperature box temperature acquisition. Compared with the prior art, the application can realize the data collaborative acquisition of the multi-channel fiber-optic gyroscope in a wide-temperature environment, and ensures the reliability of data acquisition.

Description

Technical Field

[0001] This invention relates to the field of fiber optic gyroscope data acquisition technology, and in particular to a multi-channel fiber optic gyroscope wide-temperature data acquisition system and its working method. Background Technology

[0002] Fiber optic gyroscopes, also known as fiber optic angular velocity sensors, work on the Sagnac effect. They detect motion by monitoring changes in the propagation of light waves in optical fibers. Compared to electromechanical or laser gyroscopes, fiber optic gyroscopes are more resistant to shocks and accelerated motion, and have higher detection sensitivity and resolution. Therefore, they have great application potential in mobile platforms and military fields.

[0003] To ensure the reliability of fiber optic gyroscopes, quality inspection and performance testing are often required. The current mainstream method is to place multiple fiber optic gyroscopes in a temperature chamber with a turntable and perform dynamic angular rate testing and high and low temperature environment adaptability verification. However, in practical applications, since multiple fiber optic gyroscopes rely on slip rings for signal and power transmission, data acquisition errors can easily occur due to poor slip ring contact. Retesting inevitably increases testing costs and reduces testing efficiency. In addition, a high-precision temperature control chamber is required to ensure that the temperature performance of fiber optic gyroscopes can be tested over a wide temperature range. However, the temperature control of existing temperature chambers is difficult to accurately achieve wide temperature range adaptability testing. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology by providing a multi-channel fiber optic gyroscope wide-temperature data acquisition system and its working method, which can realize the collaborative data acquisition of multi-channel fiber optic gyroscopes in a wide-temperature environment and ensure the reliability of data acquisition.

[0005] The objective of this invention can be achieved through the following technical solution: A multi-channel fiber optic gyroscope wide-temperature data acquisition system, comprising an acquisition device installed inside a temperature chamber, the acquisition device including a turntable, a support base mounted on the turntable, the support base connected to an outer shell, a power control board, an ARM communication board, and an FPGA main acquisition board installed inside the outer shell, the outer shell having multiple connector fixing holes for adapting fiber optic gyroscope interfaces, a heating film attached to the inner wall of the outer shell, the FPGA main acquisition board connected to the fiber optic gyroscope through the connector fixing holes, and the FPGA main acquisition board communicating with a host computer through the ARM communication board to wirelessly transmit fiber optic gyroscope data to the host computer, the power control board being used to realize main power control and voltage protection, main current detection, heating film control, and temperature chamber temperature acquisition.

[0006] Furthermore, the support base is connected to the bottom of the outer casing via a support rod, and the height of the support rod is greater than the highest position of the component mounted on the turntable.

[0007] Furthermore, the support base is rigidly connected to the turntable surface by screws, and the fiber optic gyroscope is fixed to the turntable surface by screws.

[0008] Furthermore, the power control board is connected to the slip ring of the turntable via a power cable to obtain power from the outside.

[0009] Furthermore, the power control board is equipped with a main power charging soft start circuit, a current and voltage detection circuit, a heating film control circuit, a main power voltage protection circuit, and a temperature detection circuit.

[0010] Furthermore, the FPGA main acquisition board is equipped with a gyroscope power control circuit, a current and voltage sampling circuit, a communication interface circuit, and a self-test circuit.

[0011] Furthermore, the ARM communication board is equipped with WiFi circuitry, USB circuitry, data storage circuitry, and communication interface circuitry.

[0012] A method for operating a multi-channel fiber optic gyroscope wide-temperature data acquisition system includes: The host computer receives the operation instructions set by the user and transmits them to the power control board and FPGA main acquisition board through the ARM communication board. The power control board provides power to multiple fiber optic gyroscopes and adjusts the working state of the heating film accordingly by detecting the ambient temperature inside the temperature chamber. The FPGA main acquisition board synchronously acquires data from multiple fiber optic gyroscopes and sends it to the ARM communication board, which then stores the data locally and transmits it to the host computer.

[0013] Furthermore, the power control board specifically adjusts the working state of the heating film to maintain the temperature inside the outer casing within a preset temperature threshold range.

[0014] Furthermore, the preset temperature threshold range is specifically greater than or equal to -10℃.

[0015] Compared with the prior art, the present invention has the following advantages: This invention features a support base mounted on a turntable inside the incubator, connecting the support base to the outer shell. A power control board, an ARM communication board, and an FPGA main acquisition board are installed inside the outer shell. The outer shell has multiple connector mounting holes for adapting to fiber optic gyroscope interfaces. The FPGA main acquisition board connects to the fiber optic gyroscope via these connector mounting holes and communicates with a host computer via the ARM communication board. This allows multi-channel fiber optic gyroscope data to be transmitted directly to the host computer wirelessly without passing through slip rings, avoiding data acquisition errors caused by poor slip ring contact. Furthermore, a heating film is attached to the inner wall of the outer shell, and the power control board controls the heating film and acquires the incubator temperature, enabling data acquisition under a wide temperature range.

[0016] The present invention connects the support base to the bottom of the outer shell via a support rod, and the height of the support rod is greater than the highest position of the mounted component on the turntable. This raises the overall mounting height of the outer shell, avoiding interference with other components of the turntable and ensuring the stability and reliability of data acquisition.

[0017] This invention features a main power supply charging soft-start circuit, a current and voltage detection circuit, and a main power supply voltage protection circuit on the power control board. The power control board provides power to multiple fiber optic gyroscopes and avoids inrush current through a soft-start method. At the same time, it can achieve overvoltage and overcurrent protection, thereby ensuring the safety and stability of the power supply.

[0018] This invention features a gyroscope power control circuit, a current and voltage sampling circuit, a communication interface circuit, and a self-test circuit on the FPGA main acquisition board, and a WiFi circuit, a USB circuit, a data storage circuit, and a communication interface circuit on the ARM communication board. The FPGA main acquisition board performs pulse data acquisition and serial port data decoding for multi-channel fiber optic gyroscope data, while the ARM communication board enables high-speed data transmission and large-capacity storage, thereby improving the efficiency of multi-channel fiber optic gyroscope data acquisition and achieving multi-channel collaborative acquisition.

[0019] This invention utilizes a power control board to adjust the working state of the heating film by collecting the ambient temperature inside the temperature chamber, so as to maintain the internal temperature of the outer shell at or above -10°C. That is, the heating film is activated for heating in the low-temperature zone below -10°C, and is not activated for heating in the high-temperature zone above -10°C. For example, when the ambient temperature inside the temperature chamber is -55°C, it can achieve a working temperature range of -55°C to 100°C, thereby meeting the long-term temperature cycle requirements and achieving wide temperature environment adaptability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of the data acquisition device in this invention; Figure 2This is a schematic diagram of the system connection relationship of the present invention; Figure 3 This is a schematic diagram of a portion of the internal structure of the outer shell in this invention; Figure 4 This is a schematic diagram of the software flow framework in the embodiment; Figure 5 This is a schematic diagram of the data transmission path in the embodiment; The markings in the diagram are as follows: 1. Outer shell, 2. Support rod, 3. Support base, 4. Turntable, 101. ARM communication board, 102. Power control board, 103. FPGA main acquisition board, 5. Fiber optic gyroscope, 6. Host computer. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] Example like Figures 1-3 As shown, a multi-channel fiber optic gyroscope wide-temperature data acquisition system includes an acquisition device installed inside a temperature chamber. The acquisition device includes a turntable 4, on which a support base 3 is mounted. The support base 3 is connected to a housing 1 via a support rod 2. Inside the housing 1, a power control board 102, an ARM communication board 101, and an FPGA main acquisition board 103 are installed. The housing 1 has multiple connector fixing holes for adapting fiber optic gyroscope interfaces. A heating film is attached to the inner wall of the housing 1. The FPGA main acquisition board 103 is connected to multiple fiber optic gyroscopes 5 via the connector fixing holes. The FPGA main acquisition board 103 communicates with a host computer 6 via the ARM communication board 101 to wirelessly transmit fiber optic gyroscope data to the host computer 6. The power control board 102 is used to realize main power control and voltage protection, main current detection, heating film control, and temperature chamber acquisition.

[0023] The support base 3 is rigidly connected to the surface of the turntable 4 with screws, and the fiber optic gyroscope 5 is fixed to the surface of the turntable 4 with screws. The power control board 102 is connected to the slip ring of the turntable 4 via a power cable to obtain power from the outside and then distribute it to each fiber optic gyroscope 5.

[0024] The working method of the above-mentioned multi-channel fiber optic gyroscope wide-temperature data acquisition system includes the following: The host computer 6 receives the operation instructions set by the user and transmits them to the power control board 102 and the FPGA main acquisition board 103 through the ARM communication board 101. The power control board 102 provides power to the multiple fiber optic gyroscopes 5 and adjusts the working state of the heating film accordingly by detecting the ambient temperature inside the temperature chamber (specifically, it adjusts the working state of the heating film to keep the temperature inside the outer shell 1 within a preset temperature threshold range. In this embodiment, the preset temperature threshold range is set to be greater than or equal to -10°C). The FPGA main acquisition board 103 synchronously acquires data from multiple fiber optic gyroscopes and sends it to the ARM communication board 101, which then stores the data locally and transmits it to the host computer 6.

[0025] This embodiment applies the above solution. First, an overall system is constructed, including a support structure, electrical components, and software modules. The three work together to realize the functions of multi-channel gyroscope data acquisition, processing, transmission, and storage. Inside the temperature chamber, the received fiber optic gyroscope data does not pass through the slip ring and is directly sent to the host computer via WIFI and backed up and saved to the storage unit.

[0026] Specifically, the support structure is designed based on the turntable surface dimensions to fix electrical components and adapt to the temperature chamber environment, including: Support 3: It is rigidly connected to the turntable 4 surface by screws to ensure the structural stability of the turntable under dynamic angular velocity (0~1000° / s); Support rod 2: connects support base 3 and outer shell 1, used to raise the height of the data acquisition device and avoid interference with other parts of turntable 4; Housing 1: Made of aluminum alloy 2A12-T4 material (combining heat dissipation and structural strength). The housing has 8 connector fixing holes (for adapting to 8-channel fiber optic gyroscope interfaces), WiFi antenna through hole (diameter adapted to ESP8266 module AIC8800D antenna), USB cable through hole (for adapting USB data cable), and power cable through hole at the bottom of housing 1 (for connecting the turntable 4 table surface slip ring).

[0027] The electrical components mainly consist of three PCB boards (i.e., power control board 102, FPGA main acquisition board 103, and ARM communication board 101). Among them, the core circuit of power control board 102 includes a main power charging soft start circuit (to mitigate the 20A+ transient inrush current when 8 gyroscopes start simultaneously), a current and voltage detection circuit, a heating film control circuit (to ensure the internal temperature of the outer casing 1 is ≥-10℃), a main power voltage protection circuit, and a temperature detection circuit. The power supply distribution of power control board 102 is as follows: the input current is divided into 8 independent channels to supply the FPGA main acquisition board 103, each channel supports ≥2A current, and the total load current is ≥16A. Power control board 102 supports +5V / -5V / +28V power supply. The soft start circuit can handle the 20A+ inrush current, and overvoltage and overcurrent protection (INA233 / CC6900 chip monitoring) is provided to achieve safe and stable power supply. The core circuit of the FPGA main acquisition board 103 includes a gyroscope power control circuit, a current and voltage sampling circuit (sampling accuracy ≤0.05V / 0.05A, sampling frequency up to 2000Hz, current range 0~20A), an interface circuit (RS422 / SPI), and a self-test circuit. The FPGA main acquisition board 103 supports gyroscope pulse output and RS422 serial port output (baud rate 0~10Mbps), and can simultaneously connect 8 fiber optic gyroscopes, adapting to pulse / serial interfaces. The core circuit of the ARM main communication board 101 includes a WiFi circuit, a USB circuit, a data storage circuit (NAND_FLASH), and an SPI / RS422 interface circuit. In this embodiment, an STM32H743VIT6 MCU (operating frequency 400MHz, 2MB flash memory, 1MB RAM, supports high-speed USB) is used as the main control chip; the WiFi module is an ESP8266 module; and the USB driver chip is a USB3300 (maximum speed 480Mbps).

[0028] like Figure 4 As shown, this embodiment designs the corresponding software control process. In the power control board 102, its core functions are to realize main power control and voltage protection (shut down the TF0211C chip in case of abnormality), main current detection (CC6920 chip monitors in real time), heating control (in conjunction with temperature acquisition, maintain the internal temperature of the outer casing ≥-10℃), temperature acquisition, and RS422 interface communication. In the FPGA main acquisition board 103, its core functions are to realize pulse data acquisition (8-channel independent judgment and mode switching), serial port data decoding (supporting different gyroscope communication protocols), current acquisition, data storage, and RS422 / SPI communication. The core functions of the ARM communication board 102 are to realize WiFi communication, data storage, file management (file storage based on power-on flag), USB communication, and SPI communication.

[0029] The implementation process of this embodiment mainly includes the following: 1. Installation and Deployment: The turntable 4 is fixed to the table surface with screws, and the power cord of the power control board 102 is connected to the slip ring of the turntable 4 to obtain power. The ARM communication board 101 transmits data to the host computer 6 wirelessly via WIFI. Eight fiber optic gyroscopes 5 are connected to the FPGA main acquisition board 103 respectively. The power supply for the fiber optic gyroscopes 5 is provided by the power control board 102. The fiber optic gyroscopes 5 are fixed to the surface of the turntable 4 with screws.

[0030] II. Environmental Preparation: Set the required temperature and rotation speed test conditions for the temperature chamber and turntable; like Figure 5 As shown, the host computer 6 establishes a connection with the ARM communication board 101 via WiFi, sends a "get configuration parameters" command, confirms that the system status is normal, and configures the host computer protocol corresponding to the fiber optic gyroscope 5.

[0031] III. Data Collection Process: The host computer 6 sends the "Power on channels 1-8" command, and the ARM communication board 101 forwards the command to the power control board 102. The power control board 102 turns on the power switch and starts the soft start circuit to avoid inrush current. The power control board 102 detects that the ambient temperature of the temperature chamber is -40℃, turns on the heating unit, and controls the heating film to heat up. The host computer 6 sends the instruction "Acquire data channels 1-8", and the ARM communication board 101 forwards the instruction to the FPGA main acquisition board 103 to synchronously acquire 8 channels of gyroscope data (pulse / RS422), sample current and voltage in real time (accuracy ≤0.05V / 0.05A), and convert the 8 parallel data output by the fiber optic gyroscope 5 into serial data and send it to the ARM communication board 101. The ARM communication board 101 receives data and stores it in the MKDN256GCL-ZA chip, and then transmits it to the host computer 6 via WiFi. The host computer 6 completes data decoding and linkage control of the temperature chamber / turntable. In the low-temperature range (below -10℃), the heating film control circuit is activated to maintain the internal temperature of the system at around -10℃, ensuring the normal operation of the components.

[0032] IV. End and Data Reading: The host computer 6 sends the commands "Stop acquiring channels 1-8" and "Power off channels 1-8". The ARM communication board 101 forwards the commands to the power control board 102 and the FPGA main acquisition board 103. The system stops acquiring gyroscope data and stops supplying power to the fiber optic gyroscope 5. The received WIFI data can be read by the host computer 6, or the USB connection cable of the ARM communication board 101 can be connected to the host computer 6 to read the data with the corresponding timestamp, and the performance analysis of the fiber optic gyroscope can be completed.

[0033] During data transmission, the measured WIFI speed is ≥0.5MB / s, the USB speed is ≥4MB / s, and the storage space is large, capable of continuously storing data for 72 hours, thus achieving high-speed transmission and large-capacity storage.

[0034] In summary, this solution can achieve reliable data acquisition from multi-channel fiber optic gyroscopes, adaptability to wide temperature environments, high-speed wireless transmission, and large-capacity storage.

Claims

1. A multi-channel fiber optic gyroscope wide-temperature data acquisition system, characterized in that, The device includes a data acquisition unit installed inside the incubator. The data acquisition unit includes a turntable (4) with a support base (3) installed on the turntable (4). The support base (3) is connected to an outer shell (1). The outer shell (1) contains a power control board (102), an ARM communication board (101), and an FPGA main acquisition board (103). The outer shell (1) has multiple connector fixing holes for adapting to the interface of the fiber optic gyroscope (5). The inner wall of the outer shell (1) is covered with a heating film. The FPGA main acquisition board (103) is connected to the fiber optic gyroscope (5) through the connector fixing holes. The FPGA main acquisition board (103) communicates with the host computer (6) through the ARM communication board (101) to wirelessly transmit the data of the fiber optic gyroscope (5) to the host computer (6). The power control board (102) is used to realize main power control and voltage protection, main current detection, heating film control, and incubator temperature acquisition.

2. The multi-channel fiber optic gyroscope wide-temperature data acquisition system according to claim 1, characterized in that, The support base (3) is connected to the bottom of the outer shell (1) via a support rod (2), and the height of the support rod (2) is greater than the highest position of the component mounted on the turntable (4).

3. The multi-channel fiber optic gyroscope wide-temperature data acquisition system according to claim 1, characterized in that, The support base (3) is rigidly connected to the table surface of the turntable (4) by screws, and the fiber optic gyroscope (5) is fixed to the table surface of the turntable (4) by screws.

4. The multi-channel fiber optic gyroscope wide-temperature data acquisition system according to claim 1, characterized in that, The power control board (102) is connected to the slip ring of the turntable (4) via a power line to obtain power from the outside.

5. A multi-channel fiber optic gyroscope wide-temperature data acquisition system according to claim 1, characterized in that, The power control board (102) is equipped with a main power charging soft start circuit, a current and voltage detection circuit, a heating film control circuit, a main power voltage protection circuit, and a temperature detection circuit.

6. The multi-channel fiber optic gyroscope wide-temperature data acquisition system according to claim 1, characterized in that, The FPGA main acquisition board (103) is equipped with a gyroscope power control circuit, a current and voltage sampling circuit, a communication interface circuit, and a self-test circuit.

7. A multi-channel fiber optic gyroscope wide-temperature data acquisition system according to claim 1, characterized in that, The ARM communication board (101) is equipped with WiFi circuit, USB circuit, data storage circuit and communication interface circuit.

8. A method for operating a multi-channel fiber optic gyroscope wide-temperature data acquisition system, applied to the multi-channel fiber optic gyroscope wide-temperature data acquisition system as described in any one of claims 1 to 7, characterized in that, include: The host computer (6) receives the operation instructions set by the user and transmits them to the power control board (102) and the FPGA main acquisition board (103) through the ARM communication board (101). The power control board (102) provides power to multiple fiber optic gyroscopes (5) and adjusts the working state of the heating film accordingly by detecting the ambient temperature inside the temperature chamber. The FPGA main acquisition board (103) synchronously acquires data from multiple fiber optic gyroscopes (5) and sends it to the ARM communication board (101), which then stores the data locally and transmits it to the host computer (6).

9. The working method of a multi-channel fiber optic gyroscope wide-temperature data acquisition system according to claim 8, characterized in that, The power control board (102) specifically adjusts the working state of the heating film to keep the temperature inside the outer shell (1) within a preset temperature threshold range.

10. The operating method of a multi-channel fiber optic gyroscope wide-temperature data acquisition system according to claim 9, characterized in that, The preset temperature threshold range is specifically greater than or equal to -10℃.

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