Fiber optic gyroscope secondary power supply-signal processing-gyroscope simulation integrated circuit

Abstract

The invention discloses a fiber-optic gyroscope secondary power supply-signal processing-gyroscope simulation integrated circuit which comprises an electric connector, a secondary power supply circuit part, a signal processing circuit part, a temperature sensor and a fiber-optic gyroscope simulation circuit part. According to the invention, the secondary power supply circuit, the signal processing circuit and the gyro analog circuit are highly integrated on the same substrate. According to the design, a multi-field circuit fusion framework is adopted, the overall reliability and the signal integrity are considered during circuit design, and by optimizing circuit layout and a signal transmission path, the wiring complexity of a product can be remarkably reduced, the size of the product is reduced, and meanwhile, the anti-interference capability and the reliability of the product are greatly improved.

Description

Technical Field

[0001] This invention relates to the technical field of fiber optic gyroscopes, and in particular to an integrated circuit that combines a secondary power supply, signal processing, and gyroscope analog circuit for a fiber optic gyroscope. Background Technology

[0002] As a core sensor in inertial navigation systems, the integration and reliability of the fiber optic gyroscope's circuit modules directly affect system performance. Current mainstream designs employ a discrete architecture, which suffers from the following inherent drawbacks:

[0003] 1. Space occupancy versus weight conflict: The discrete design physically separates the secondary power supply circuit board, signal processing circuit board, and gyroscope analog circuit board, resulting in large component size and complex wiring;

[0004] 2. Electromagnetic interference: High-frequency signal crosstalk between multiple boards leads to a decrease in gyroscope performance;

[0005] 3. Reliability bottlenecks: There are pitfalls in the reliability of multi-level interconnection, such as the failure of inter-board connectors under random vibration and the shortened fatigue life of cables due to bending. Summary of the Invention

[0006] This invention provides an integrated circuit for fiber optic gyroscope secondary power supply, signal processing, and gyroscope analog circuitry. This integrated circuit integrates a high-density, multi-functional module for secondary power conversion, digital signal processing, and gyroscope analog circuitry, replacing traditional discrete designs. This integrated circuit can significantly reduce the size and weight of the product, while its high integration level also greatly reduces system wiring complexity, and significantly improves reliability and anti-interference capabilities.

[0007] In a first aspect, an integrated circuit for fiber optic gyroscope secondary power supply, signal processing, and gyroscope analog circuitry is provided. The fiber optic gyroscope components used in the integrated circuit include a light source and a fiber optic gyroscope digital circuit section. The integrated circuit includes an electrical connector, a secondary power supply circuit section, a signal processing circuit section, a temperature sensor, and a fiber optic gyroscope analog circuit section.

[0008] The electrical connector is used to introduce the +5V power supply voltage and RS422 signal from the upstream system into the fiber optic gyroscope assembly;

[0009] The secondary power supply circuit is powered by an electrical connector. The secondary power supply circuit is used to convert the +5V supply voltage of the fiber optic gyroscope assembly into +5V and -5V after multi-stage filtering, which are used by the signal processing circuit, the analog circuit of the fiber optic gyroscope, and the digital circuit of the fiber optic gyroscope. At the same time, it detects the working status of each circuit and realizes the protection function of the fiber optic gyroscope assembly.

[0010] The signal processing circuit section is used for the acquisition and control of the fiber optic gyroscope digital circuit section and temperature sensor, and realizes the external RS422 communication function to provide the angular velocity and attitude information of the carrier in three orthogonal axes;

[0011] Temperature sensors are used to measure the temperature of fiber optic gyroscope components and provide data for temperature modeling and compensation of the product.

[0012] The analog circuit section of the fiber optic gyroscope is used to provide a stable drive current to the light source and to control the temperature of the light source die.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the electrical connector is directly soldered onto the printed circuit board and introduced into the subsequent circuit via a flexible wire; the specification of the electrical connector is J30J-25ZKNP-J.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the secondary power supply circuit includes: overcurrent protection, front-end common-mode filtering, surge suppression, rear-end common-mode filtering, differential-mode filtering, and a +5V to -5V unit;

[0015] The +5V power supply voltage of the fiber optic gyroscope assembly enters the secondary power supply circuit through the external electrical connector. After passing through overcurrent protection, pre-stage common-mode filtering, and surge suppression, it is divided into three paths. The first path converts +5V to -5V through a +5V to -5V unit to supply the three gyroscope digital circuits. The second path is directly introduced into the gyroscope analog circuit to supply power to the light source drive circuit unit and the light source temperature control unit. The third path, after differential-mode filtering, supplies power to the signal processing circuit and the three gyroscope digital circuits.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the secondary power supply circuit section further includes: a light source temperature control circuit fault detection unit, a signal processing circuit current detection unit, an X-axis gyroscope digital circuit current detection unit, a Y-axis gyroscope digital circuit current detection unit, a Z-axis gyroscope digital circuit current detection unit, and a detection data comprehensive judgment and control unit.

[0017] The light source temperature control circuit fault detection unit is used to detect the temperature of the light source chip. When the chip temperature exceeds the set temperature range, the light source temperature control circuit fault detection unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism.

[0018] The signal processing circuit current detection unit is used to detect the operating current of the signal processing circuit. When the operating current of the signal processing circuit exceeds the set range, the signal processing circuit current detection unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism.

[0019] The X-axis gyroscope digital circuit current detection unit is used to detect the operating current of the X-axis gyroscope digital circuit. When the operating current of the X-axis gyroscope digital circuit exceeds the set range, the X-axis gyroscope digital circuit current detection unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism.

[0020] The Y-axis gyroscope digital circuit current detection unit is used to detect the operating current of the Y-axis gyroscope digital circuit. When the operating current of the Y-axis gyroscope digital circuit exceeds the set range, the Y-axis gyroscope digital circuit current detection unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism.

[0021] The Z-axis gyroscope digital circuit current detection unit is used to detect the operating current of the Z-axis gyroscope digital circuit. When the operating current of the Z-axis gyroscope digital circuit exceeds the set range, the Z-axis gyroscope digital circuit current detection unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism.

[0022] The detection data comprehensive judgment and control unit is used to receive feedback information from the light source temperature control circuit fault detection unit, the signal processing circuit current detection unit, the X-axis gyroscope digital circuit current detection unit, the Y-axis gyroscope digital circuit current detection unit, and the Z-axis gyroscope digital circuit current detection unit, and to make a comprehensive judgment to decide whether to activate the protection mechanism; the detection data comprehensive judgment and control unit controls surge suppression according to the received feedback information to realize closed-loop control of the secondary power supply circuit.

[0023] In conjunction with the first aspect, in some implementations of the first aspect, the overcurrent protection of the secondary power supply circuit section adopts two balanced fuses connected in parallel, with fuse specification 046602.5NR; the +5V to -5V conversion is implemented by the chip DCP020505U.

[0024] In conjunction with the first aspect, in some implementations of the first aspect, the signal processing circuit includes: a power supply interface, a crystal oscillator, an FPGA, a temperature acquisition interface, a gyroscope interface, and an RS422 communication interface; wherein, the power supply interface is used to convert the +5V voltage output by the secondary power supply circuit into the 3.3V and 1.5V voltages required by the signal processing circuit; the crystal oscillator is used to provide a clock reference for the signal processing circuit; the RS422 communication interface is used to implement two-way RS-422 standard serial communication to realize signal communication between the signal processing circuit and the electrical connector; the temperature acquisition interface is used to acquire one-way temperature through a temperature sensor; the gyroscope interface is used to send synchronization signals to three-way gyroscope digital circuits and receive reply information from the three-way gyroscope digital circuits; the FPGA is used to implement all signal processing and control of the signal processing circuit, and finally provides the angular velocity and attitude information of the carrier along the three orthogonal axes through the RS422 interface.

[0025] In conjunction with the first aspect, in some implementations of the first aspect, voltage conversion is implemented by the chip LM1117ILD-ADJ; the clock reference frequency provided by the crystal oscillator is 22.1184MHz; the temperature sensor is 18B20; and the FPGA is A3P10001FGG144YI chip.

[0026] In conjunction with the first aspect, in some implementations of the first aspect, the fiber optic gyroscope analog circuit includes: a power supply filter, a light source driving circuit, and a light source temperature control circuit; the power supply filter includes two LC low-pass filters, which are used to filter the light source driving circuit and the light source temperature control circuit, respectively; the light source driving circuit is used to provide a stable driving current to the light source; and the light source temperature control circuit is used to control the temperature of the light source chip.

[0027] In conjunction with the first aspect, in some implementations of the first aspect, the light source driving circuit includes a voltage reference unit, an adjustable voltage divider network, and a voltage-controlled current source circuit, connected between the power supply and the light source; wherein, the voltage reference unit is used to provide a high-precision reference voltage for the adjustable voltage divider network; the adjustable voltage divider network is used to generate a reasonable adjustable voltage; the voltage-controlled current source circuit is used to receive the adjustable voltage output by the adjustable voltage divider network and generate an adjustable current; the light source is used to receive the adjustable current generated by the voltage-controlled current source circuit and emit light with a constant wavelength and adjustable power.

[0028] In conjunction with the first aspect, in some implementations of the first aspect, the light source temperature control circuit includes a temperature sampling bridge, a temperature control chip, a Peltier drive circuit, a sampling circuit, and a temperature feedback network; wherein, a Peltier and a thermistor are installed inside the light source; the Peltier and the thermistor are connected to the light source temperature control circuit via leads; the thermistor has a negative temperature coefficient, and the resistance of the thermistor decreases as the temperature increases; the Peltier achieves heating or cooling;

[0029] The signal from the thermistor is introduced into the temperature sampling bridge to generate a voltage signal that varies with temperature. The temperature control chip receives the temperature-varying voltage signal output from the temperature sampling bridge and the current information flowing through the Peltier from the sampling circuit and PID feedback network. After comprehensive analysis, the temperature control chip outputs a suitable drive signal to the Peltier drive circuit to drive the Peltier to heat or cool the light source chip.

[0030] Compared with the prior art, the solution provided by the present invention has at least the following beneficial technical effects:

[0031] (1) In terms of the architecture design of this invention, three circuits are integrated into one high-density multi-functional module that integrates secondary power conversion, digital signal processing and gyroscope analog circuit to replace the traditional discrete design, effectively reducing the size and weight of the product, simplifying the wiring complexity and greatly improving the reliability of the product.

[0032] (2) In terms of system composition, the present invention adopts a fault detection unit for important circuits, and realizes the detection and protection of each important circuit through comprehensive judgment and control unit based on detection data, which greatly improves product reliability and is more suitable for high-requirement and long-life occasions.

[0033] (3) In the design of secondary power supply, this invention reduces mutual interference between modules by optimizing the circuit power supply matching scheme and multi-level filtering method, and at the same time greatly improves the anti-interference ability and EMC performance of the product.

[0034] (4) The light source temperature control circuit of the present invention adopts an overall architecture of "temperature control chip + peripheral circuit + temperature feedback". The temperature control chip and reasonable peripheral circuit realize high-precision temperature control of the light source. The temperature feedback part introduces a fault detection unit of the light source temperature control circuit of the secondary power supply circuit, which can realize the monitoring and protection of the working status of the temperature control circuit and reduce the requirements for the reliability of the temperature control chip itself.

[0035] (5) In the signal processing circuit design, the present invention uses FLASH FPGA as the only core component, and external level conversion circuit, crystal oscillator, data acquisition circuit and communication interface circuit to realize the acquisition and control of gyroscope digital circuit and temperature sensor, and realize external RS422 communication function. The system logic is simple and the reliability is high. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a fiber optic gyroscope assembly.

[0037] Figure 2 This is a block diagram of the composition logic of the present invention.

[0038] Figure 3 This is a block diagram of the secondary power supply circuit of the present invention.

[0039] Figure 4 This is a block diagram of the signal processing circuit of the present invention.

[0040] Figure 5 This is a block diagram of the gyroscope simulation part of the present invention.

[0041] Figure 6 This is a schematic diagram of the light source driving circuit of the present invention.

[0042] Figure 7 This is a schematic diagram of the light source temperature control circuit of the present invention. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0044] This invention provides an integrated circuit for fiber optic gyroscope secondary power supply, signal processing, and gyroscope analog operation. Its function is to provide angular velocity and attitude information of the carrier along three orthogonal axes via an RS422 interface. This integrated circuit is part of a fiber optic gyroscope assembly, which includes a light source, other optical path components, digital circuitry (X-axis, Y-axis, and Z-axis gyroscope digital boards), and the integrated circuit provided by this invention. A schematic diagram of the fiber optic gyroscope assembly is shown below. Figure 1 The logic block diagram of the integrated circuit provided by this invention is shown below. Figure 2 .

[0045] The integrated circuit provided by this invention includes: an electrical connector, a secondary power supply circuit, a signal processing circuit, a temperature sensor, and a fiber optic gyroscope analog circuit. The electrical connector is used to introduce the +5V power supply voltage and RS422 signal from the upper-level system into the fiber optic gyroscope assembly. The secondary power supply circuit converts the +5V power supply voltage of the fiber optic gyroscope assembly into +5V and -5V after multi-stage filtering, supplying power to the signal processing circuit, the fiber optic gyroscope analog circuit, and the fiber optic gyroscope digital circuit, while simultaneously monitoring the operation of each circuit to achieve the protection function of the fiber optic gyroscope assembly. The signal processing circuit is used for the acquisition and control of the fiber optic gyroscope digital circuit and the temperature sensor, and to realize external RS422 communication. The temperature sensor is used to measure the temperature of the fiber optic gyroscope assembly and provide data for temperature modeling and compensation of the product. The fiber optic gyroscope analog circuit is used to provide a stable drive current to the light source and to achieve temperature control of the light source die.

[0046] The electrical connector of the integrated circuit is used to receive external power and enable external RS422 communication. The electrical connector can be directly soldered onto the printed circuit board and then introduced into the subsequent circuitry via flexible wires. In some embodiments, the electrical connector specification is J30J-25ZKNP-J.

[0047] The secondary power supply circuit of the integrated circuit is powered by an electrical connector. For example... Figure 3 As shown, the secondary power supply circuit includes: overcurrent protection, pre-stage common-mode filtering, surge suppression, post-stage common-mode filtering, differential-mode filtering, +5V to -5V unit, light source temperature control circuit fault detection unit, signal processing circuit current detection unit, X-axis gyroscope digital circuit current detection unit, Y-axis gyroscope digital circuit current detection unit, Z-axis gyroscope digital circuit current detection unit, and detection data comprehensive judgment and control unit.

[0048] The +5V power supply voltage of the fiber optic gyroscope assembly enters the secondary power supply circuit through the external electrical connector. After passing through overcurrent protection, pre-stage common-mode filtering, and surge suppression, it is divided into three paths. The first path converts +5V to -5V via a +5V to -5V converter to power the three gyroscope digital circuits. The second path directly supplies power to the gyroscope analog circuit, powering both the light source drive circuit and the light source temperature control unit. The third path, after differential-mode filtering, powers both the signal processing circuit and the three gyroscope digital circuits.

[0049] In some embodiments, the overcurrent protection of the secondary power supply circuit uses two balanced fuses connected in parallel, with fuse specification 046602.5NR; the +5V to -5V conversion is achieved by the chip DCP020505U.

[0050] In some embodiments, the fault detection unit of the light source temperature control circuit in the secondary power supply circuit section can detect the temperature of the light source die. When the die temperature exceeds the set temperature range, the unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism.

[0051] In some embodiments, the signal processing circuit current detection unit in the secondary power supply circuit section can detect the operating current of the signal processing circuit. When the operating current of the signal processing circuit exceeds a set range, the unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism.

[0052] In some embodiments, the X-axis gyroscope digital circuit current detection unit in the secondary power supply circuit section can detect the operating current of the X-axis gyroscope digital circuit. When the operating current of the X-axis gyroscope digital circuit exceeds the set range, the unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism.

[0053] In some embodiments, the Y-axis gyroscope digital circuit current detection unit in the secondary power supply circuit section can detect the operating current of the Y-axis gyroscope digital circuit. When the operating current of the Y-axis gyroscope digital circuit exceeds the set range, the unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism.

[0054] In some embodiments, the Z-axis gyroscope digital circuit current detection unit in the secondary power supply circuit section can detect the operating current of the Z-axis gyroscope digital circuit. When the operating current of the Z-axis gyroscope digital circuit exceeds the set range, the unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism.

[0055] In some embodiments, the detection data comprehensive judgment and control unit in the secondary power supply circuit receives feedback information from the light source temperature control circuit fault detection unit, the signal processing circuit current detection unit, the X-axis gyroscope digital circuit current detection unit, the Y-axis gyroscope digital circuit current detection unit, and the Z-axis gyroscope digital circuit current detection unit. After comprehensive judgment, it decides whether to activate the protection mechanism. The detection data comprehensive judgment and control unit controls surge suppression based on the received feedback information to achieve closed-loop control of the secondary power supply circuit.

[0056] The signal processing circuit section of an integrated circuit, such as Figure 4 As shown, the signal processing circuit includes a power supply interface, a crystal oscillator, an FPGA, a temperature acquisition interface, a gyroscope interface, and an RS422 communication interface. The power supply interface converts the +5V output from the secondary power supply circuit into the 3.3V and 1.5V voltages required by the signal processing circuit; this voltage conversion is implemented, for example, by the LM1117ILD-ADJ chip. The crystal oscillator provides a clock reference for the signal processing circuit; a frequency of 22.1184MHz is selected, for example. The RS422 communication interface implements two-way RS-422 standard serial communication, enabling signal communication between the signal processing circuit and the electrical connector. The temperature acquisition interface acquires one temperature reading via a temperature sensor, for example, an 18B20 temperature sensor. The gyroscope interface sends synchronization signals to and receives responses from three gyroscope digital circuits. The FPGA implements all signal processing and control of the signal processing circuit, ultimately providing the angular velocity and attitude information of the carrier along three orthogonal axes via the RS422 interface. For example, the FPGA can use the A3P10001FGG144YI chip.

[0057] The gyroscope analog circuit section of an integrated circuit, such as Figure 5As shown, the analog circuit of the fiber optic gyroscope includes: power supply filtering, a light source driving circuit, and a light source temperature control circuit. The power supply filtering can include two LC low-pass filters, one for the light source driving circuit and the other for the light source temperature control circuit. The light source driving circuit provides a stable driving current to the light source. The light source temperature control circuit controls the temperature of the light source chip.

[0058] like Figure 6 As shown, the light source driving circuit includes a voltage reference unit, an adjustable voltage divider network, and a voltage-controlled current source circuit, connected between the power supply and the light source. The voltage reference unit provides a high-precision reference voltage to the adjustable voltage divider network. The adjustable voltage divider network generates a suitable adjustable voltage. The voltage-controlled current source circuit receives the adjustable voltage output from the adjustable voltage divider network and generates an adjustable current. The light source receives the adjustable current generated by the voltage-controlled current source circuit and emits light with a constant wavelength and adjustable power.

[0059] like Figure 7 As shown, the light source temperature control circuit includes a temperature sampling bridge, a temperature control chip, a Peltier drive circuit, a sampling circuit, and a temperature feedback network. Among these, Figure 6 The light source shown contains a Peltier and a thermistor. The Peltier and the thermistor are connected to the light source's temperature control circuit via leads. The thermistor has a negative temperature coefficient; its resistance decreases as the temperature increases. The Peltier enables heating or cooling.

[0060] By introducing the signal from the thermistor into the temperature-sensing bridge, a voltage signal that varies with temperature is generated. The temperature control chip receives the temperature-varying voltage signal output from the temperature-sensing bridge and the current information flowing through the Peltier tube fed back by the sampling circuit and the PID feedback network. After comprehensive analysis, the temperature control chip outputs a suitable drive signal to the Peltier drive circuit to drive the Peltier to heat or cool the light source chip. The temperature feedback network feeds back the information output by the temperature control chip to the fault detection unit of the light source temperature control circuit. The detection data is then used to comprehensively judge and control the system to determine whether to activate the fiber optic gyroscope component protection mechanism.

[0061] In some embodiments, the temperature control chip is implemented using MAX1978ETM+, and the sampling circuit and PID feedback network are implemented using appropriate resistors and capacitors.

[0062] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims of the present invention.

Claims

1. An integrated circuit for fiber optic gyroscope secondary power supply, signal processing, and gyroscope analog operation, characterized in that: The fiber optic gyroscope component of the integrated integrated circuit application includes a light source and a fiber optic gyroscope digital circuit section. The integrated integrated circuit includes: an electrical connector, a secondary power supply circuit section, a signal processing circuit section, a temperature sensor, and a fiber optic gyroscope analog circuit section. The electrical connector is used to introduce the +5V power supply voltage and RS422 signal from the upstream system into the fiber optic gyroscope assembly; The secondary power supply circuit is powered by an electrical connector. The secondary power supply circuit is used to convert the +5V supply voltage of the fiber optic gyroscope assembly into +5V and -5V after multi-stage filtering, which are used by the signal processing circuit, the analog circuit of the fiber optic gyroscope, and the digital circuit of the fiber optic gyroscope. At the same time, it detects the working status of each circuit and realizes the protection function of the fiber optic gyroscope assembly. The signal processing circuit section is used for the acquisition and control of the fiber optic gyroscope digital circuit section and temperature sensor, and realizes the external RS422 communication function to provide the angular velocity and attitude information of the carrier in three orthogonal axes; Temperature sensors are used to measure the temperature of fiber optic gyroscope components and provide data for temperature modeling and compensation of the product. The analog circuit section of the fiber optic gyroscope is used to provide a stable drive current to the light source and to control the temperature of the light source die.

2. The integrated circuit according to claim 1, characterized in that, The electrical connector is directly soldered onto the printed circuit board and introduced into the subsequent circuit through a flexible wire; the specification of the electrical connector is J30J-25ZKNP-J.

3. The integrated circuit according to claim 1, characterized in that, The secondary power supply circuit includes: overcurrent protection, front-end common-mode filtering, surge suppression, rear-end common-mode filtering, differential-mode filtering, and a +5V to -5V unit; The +5V power supply voltage of the fiber optic gyroscope assembly enters the secondary power supply circuit through the external electrical connector. After passing through overcurrent protection, pre-stage common-mode filtering, and surge suppression, it is divided into three paths. The first path converts +5V to -5V through a +5V to -5V unit to supply the three gyroscope digital circuits. The second path is directly introduced into the gyroscope analog circuit to supply power to the light source drive circuit unit and the light source temperature control unit. The third path, after differential-mode filtering, supplies power to the signal processing circuit and the three gyroscope digital circuits.

4. The integrated circuit according to claim 3, characterized in that, The secondary power supply circuit also includes: a light source temperature control circuit fault detection unit, a signal processing circuit current detection unit, an X-axis gyroscope digital circuit current detection unit, a Y-axis gyroscope digital circuit current detection unit, a Z-axis gyroscope digital circuit current detection unit, and a detection data comprehensive judgment and control unit. The light source temperature control circuit fault detection unit is used to detect the temperature of the light source chip. When the chip temperature exceeds the set temperature range, the light source temperature control circuit fault detection unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism. The signal processing circuit current detection unit is used to detect the operating current of the signal processing circuit. When the operating current of the signal processing circuit exceeds the set range, the signal processing circuit current detection unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism. The X-axis gyroscope digital circuit current detection unit is used to detect the operating current of the X-axis gyroscope digital circuit. When the operating current of the X-axis gyroscope digital circuit exceeds the set range, the X-axis gyroscope digital circuit current detection unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism. The Y-axis gyroscope digital circuit current detection unit is used to detect the operating current of the Y-axis gyroscope digital circuit. When the operating current of the Y-axis gyroscope digital circuit exceeds the set range, the Y-axis gyroscope digital circuit current detection unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism. The Z-axis gyroscope digital circuit current detection unit is used to detect the operating current of the Z-axis gyroscope digital circuit. When the operating current of the Z-axis gyroscope digital circuit exceeds the set range, the Z-axis gyroscope digital circuit current detection unit will feed the information back to the detection data comprehensive judgment and control unit, which will then decide whether to activate the fiber optic gyroscope component protection mechanism. The detection data comprehensive judgment and control unit is used to receive feedback information from the light source temperature control circuit fault detection unit, the signal processing circuit current detection unit, the X-axis gyroscope digital circuit current detection unit, the Y-axis gyroscope digital circuit current detection unit, and the Z-axis gyroscope digital circuit current detection unit, and to make a comprehensive judgment to decide whether to activate the protection mechanism; the detection data comprehensive judgment and control unit controls surge suppression according to the received feedback information to realize closed-loop control of the secondary power supply circuit.

5. The integrated circuit according to claim 3, characterized in that, The overcurrent protection of the secondary power supply circuit uses two balanced fuses connected in parallel, with fuse specification 046602.5NR; the +5V to -5V conversion is achieved by the chip DCP020505U.

6. The integrated circuit according to claim 1, characterized in that, The signal processing circuit includes a power supply interface, a crystal oscillator, an FPGA, a temperature acquisition interface, a gyroscope interface, and an RS422 communication interface. The power supply interface converts the +5V output from the secondary power supply circuit into the 3.3V and 1.5V voltages required by the signal processing circuit. The crystal oscillator provides a clock reference for the signal processing circuit. The RS422 communication interface enables two-way RS-422 standard serial communication between the signal processing circuit and the electrical connector. The temperature acquisition interface acquires one temperature reading via a temperature sensor. The gyroscope interface sends synchronization signals to and receives responses from three gyroscope digital circuits. The FPGA handles all signal processing and control, ultimately providing the angular velocity and attitude information of the carrier along three orthogonal axes via the RS422 interface.

7. The integrated circuit according to claim 6, characterized in that, Voltage conversion is implemented by the LM1117ILD-ADJ chip; the clock reference frequency provided by the crystal oscillator is 22.1184MHz; the temperature sensor is 18B20; and the FPGA is A3P10001FGG144YI chip.

8. The integrated circuit according to claim 1, characterized in that, The fiber optic gyroscope analog circuit includes: a power supply filter, a light source drive circuit, and a light source temperature control circuit; the power supply filter includes two LC low-pass filters, which are used to filter the light source drive circuit and the light source temperature control circuit, respectively; the light source drive circuit is used to provide a stable drive current to the light source; the light source temperature control circuit is used to control the temperature of the light source chip.

9. The integrated circuit according to claim 8, characterized in that, The light source driving circuit includes a voltage reference unit, an adjustable voltage divider network, and a voltage-controlled current source circuit, connected between the power supply and the light source. The voltage reference unit provides a high-precision reference voltage for the adjustable voltage divider network. The adjustable voltage divider network generates a reasonable adjustable voltage. The voltage-controlled current source circuit receives the adjustable voltage output from the adjustable voltage divider network and generates an adjustable current. The light source receives the adjustable current generated by the voltage-controlled current source circuit and emits light with a constant wavelength and adjustable power.

10. The integrated circuit according to claim 8, characterized in that, The light source temperature control circuit includes a temperature sampling bridge, a temperature control chip, a Peltier drive circuit, a sampling circuit, and a temperature feedback network. The light source contains a Peltier and a thermistor. The Peltier and the thermistor are connected to the light source temperature control circuit via leads. The thermistor has a negative temperature coefficient; the higher the temperature, the lower the resistance of the thermistor. The Peltier enables heating or cooling. The signal from the thermistor is introduced into the temperature sampling bridge to generate a voltage signal that changes with temperature. The temperature control chip receives the temperature-changing voltage signal output by the temperature sampling bridge and the current information flowing through the Peltier from the sampling circuit and the PID feedback network. The temperature control chip analyzes both and outputs a suitable drive signal to the Peltier drive circuit to drive the Peltier to heat or cool the light source chip. The temperature feedback network feeds back the information output by the temperature control chip to the fault detection unit of the light source temperature control circuit. The detection data is then used to make a comprehensive judgment and the control unit decides whether to activate the fiber optic gyroscope component protection mechanism.

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