Power supply and interface board for optical fiber inertial navigation

Abstract

The utility model belongs to the technical field of optical fiber inertial navigation system equipment, and particularly provides a power supply and interface board for optical fiber inertial navigation, which comprises a bottom plate, a filter, a two-way output DC / DC power supply module, a three-way output DC / DC power supply module and a plurality of micro rectangular electric connectors, the filter, the two-way output DC / DC power supply module, the three-way output DC / DC power supply module and the plurality of micro rectangular electric connectors are all connected to the bottom plate; the optical fiber inertial navigation system solves the problem that the existing optical fiber inertial navigation system cannot meet the requirement of miniaturization development, integrates power supply and interface functions on one circuit board, reduces the size of the circuit board, meets the requirement of miniaturization development, simplifies signal transmission, and further improves reliability.

Description

Technical Field

[0001] This utility model belongs to the technical field of fiber optic inertial navigation system equipment, specifically relating to a power supply and interface board for fiber optic inertial navigation. Background Technology

[0002] Fiber optic inertial navigation systems (FISs) are high-precision, high-reliability navigation systems widely used in aviation, aerospace, navigation, geological exploration, and other fields. They provide vehicles with autonomous, real-time, and accurate navigation information, including attitude, velocity, and position. A typical FIS system consists of a fiber optic gyroscope, accelerometer, navigation calculation board, interface board, and power supply board. The core components of an FIS system are the fiber optic gyroscope and accelerometer, two types of inertial sensors. Under normal conditions, the fiber optic gyroscope outputs an RS-422 signal, while the accelerometer outputs a current signal. An I / F converter board converts the current signal into the corresponding frequency signal. The navigation calculation board collects, processes, and calculates data from the various inertial sensors to obtain the vehicle's attitude, velocity, position, and other navigation parameters. The interface board converts the input / output data and power supply of the fiber optic gyroscope, accelerometer, I / F converter board, and navigation calculation board. The power supply board converts the DC power transmitted to the FIS into the power types required by the fiber optic gyroscope, accelerometer, I / F converter board, and navigation calculation board.

[0003] Miniaturization is one of the development directions of fiber optic inertial navigation. Not only do inertial sensors need to be miniaturized, but hardware circuits also need to be designed for miniaturization.

[0004] Chinese patent document CN208834185U discloses a general-purpose navigation control device, comprising: an inertial accelerometer; a main control board connected to the inertial accelerometer, which receives acceleration data measured by the inertial accelerometer, converts the acceleration data into position information, and controls the flight speed, turn, or pitch angle of an aircraft based on the position information; an interface board equipped with a power connector, a test connector, and a function connector, collectively referred to as connectors, which transmits information between the main control board and external devices of the navigation control device; and a power supply to provide power to the entire device. The purpose of this document is to provide a general-purpose navigation control device that can perform independent guidance without relying on GPS, complements GPS to improve navigation accuracy, has strong versatility, allows for selective functional development, and is easy to maintain. However, the interface board and power supply in this document are conventionally separate and do not meet the requirements for miniaturization. Utility Model Content

[0005] The purpose of this utility model is to provide a power supply and interface board for fiber optic inertial navigation to overcome the problem that existing fiber optic inertial navigation systems cannot meet the requirements for miniaturization.

[0006] To address this, the present invention provides a power supply and interface board for fiber optic inertial navigation, comprising a base plate, a filter, a two-output DC / DC power module, a three-output DC / DC power module, and multiple micro-rectangular electrical connectors; the filter, the two-output DC / DC power module, the three-output DC / DC power module, and the multiple micro-rectangular electrical connectors are all connected to the base plate; the output end of the filter is electrically connected to the input end of the two-output DC / DC power module and the input end of the three-output DC / DC power module, respectively, and the input end of the filter, the output end of the two-output DC / DC power module, and the output end of the three-output DC / DC power module are all electrically connected to one or more micro-rectangular electrical connectors.

[0007] Preferably, the plurality of micro-rectangular electrical connectors are an X-axis accelerator connector, a Y-axis accelerator connector, a Z-axis accelerator connector, an external connector, a navigation calculation board connector, an I / F conversion board connector, and a gyroscope connector. The output end of the external connector is electrically connected to the power supply pin of the external connector. The output end of the two-channel output DC / DC power module is electrically connected to the power supply pin of the gyroscope connector. The output end of the three-channel output DC / DC power module is electrically connected to the power supply pins of the X-axis accelerator connector, the Y-axis accelerator connector, the Z-axis accelerator connector, the navigation calculation board connector, and the I / F conversion board connector, respectively.

[0008] Preferably, the micro-rectangular electrical connector is a micro-rectangular bent-pin printed circuit board connector.

[0009] Preferably, the filter is an EMI filter.

[0010] Preferably, the plurality of micro rectangular electrical connectors are distributed along the edge of the base plate, and the filter, the two-output DC / DC power module and the three-output DC / DC power module are located inside the plurality of micro rectangular electrical connectors along the base plate. The filter is located on the input side of the two-output DC / DC power module and the input side of the three-output DC / DC power module.

[0011] Preferably, the micro rectangular bend printed circuit board connector is a J30JZ micro rectangular bend printed circuit board connector.

[0012] Preferably, the external connector and I / F conversion board connector are 25-pin J30JZ micro rectangular bent plug printed circuit board connectors, the X-axis accelerator connector, Y-axis accelerator connector, Z-axis accelerator connector and gyroscope connector are 9-pin J30JZ micro rectangular bent plug printed circuit board connectors, and the navigation calculation board connector is a 31-pin J30JZ micro rectangular bent plug printed circuit board connector.

[0013] Preferably, both the two-output DC / DC power module and the three-output DC / DC power module adopt microelectronic surface mount technology.

[0014] Preferably, both the two-output DC / DC power module and the three-output DC / DC power module are internally encapsulated with thermally conductive material.

[0015] Preferably, both the two-output DC / DC power module and the three-output DC / DC power module are metal-encapsulated.

[0016] The beneficial effects of this utility model are:

[0017] 1. The power supply and interface board for fiber optic inertial navigation provided by this utility model integrates power supply and interface functions on a single circuit board by connecting the filter, two-way output DC / DC power module, three-way output DC / DC power module and multiple micro rectangular electrical connectors on the base plate. This reduces the size of the circuit board, meets the needs of miniaturization, simplifies signal transmission, and further improves reliability.

[0018] 2. The power supply and interface board for fiber optic inertial navigation provided by this utility model uses a micro rectangular electrical connector, which is a micro rectangular bent-plug printed circuit board connector, effectively reducing the size of the circuit board and meeting the requirements of system miniaturization.

[0019] 3. The power supply and interface board for fiber optic inertial navigation provided by this utility model has filters located on the input side of the two-channel output DC / DC power module and the input side of the three-channel output DC / DC power module. It can effectively suppress the high-frequency reflection noise of the system input power supply and the high-frequency reflection noise of the power supply line of the power module, so that the noise reflection limit on the power line meets the relevant standard requirements. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the power supply and interface board for fiber optic inertial navigation.

[0022] Figure 2 This is the wiring diagram for the power supply and interface board of the fiber optic inertial navigation system.

[0023] Figure 3This is a schematic diagram of the power supply and interface board for fiber optic inertial navigation.

[0024] Explanation of reference numerals in the attached diagram: 1. Filter; 2. Two-channel output DC / DC power supply module; 3. Three-channel output DC / DC power supply module; 4. X-axis accelerometer connector; 5. Y-axis accelerometer connector; 6. Z-axis accelerometer connector; 7. External connector; 8. Navigation calculation board connector; 9. I / F conversion board connector; 10. Gyroscope connector; 11. Gyroscope cable; 12. Three-axis fiber optic gyroscope; 13. X-axis accelerometer; 14. Y-axis accelerometer; 15. Z-axis accelerometer; 16. System connection cable; 17. Navigation calculation board cable; 18. Navigation calculation board; 19. I / F conversion board; 20. I / F conversion board cable; 21. Base plate. Detailed Implementation

[0025] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0026] Example 1:

[0027] like Figure 1 and Figure 2 As shown, a power supply and interface board for fiber optic inertial navigation includes a base plate 21, a filter 1, a two-output DC / DC power module 2, a three-output DC / DC power module 3, and multiple micro-rectangular electrical connectors. The filter 1, the two-output DC / DC power module 2, the three-output DC / DC power module 3, and the multiple micro-rectangular electrical connectors are all connected to the base plate 21. The output terminal of the filter 1 is electrically connected to the input terminal of the two-output DC / DC power module 2 and the input terminal of the three-output DC / DC power module 3, respectively. The input terminal of the filter 1, the output terminal of the two-output DC / DC power module 2, and the output terminal of the three-output DC / DC power module 3 are all electrically connected to one or more micro-rectangular electrical connectors.

[0028] Specifically, during use, based on the power supply voltage level and power consumption requirements of the inertial sensor and hardware circuit, filter 1, two-output DC / DC power module 2, and three-output DC / DC power module 3 should be selected. For example... Figure 3 As shown, the system requires ±15V, ±5V, and +5V DC power supplies, which are typically powered by three DC / DC power modules. One dual-output DC / DC power module can be selected to provide ±15V, one dual-output DC / DC power module to provide ±5V, and one single-output DC / DC power module to provide +5V. However, due to limited system space, to reduce circuit board size, two types of DC / DC power modules were selected: one with two outputs (DC / DC power module 2) and the other with three outputs (DC / DC power module 3).

[0029] By connecting filter 1, two-output DC / DC power module 2, three-output DC / DC power module 3, and multiple micro rectangular electrical connectors to the base plate 21, the power supply and interface functions are integrated on a single circuit board, reducing the circuit board size, meeting the needs of miniaturization, simplifying signal transmission, and further improving reliability.

[0030] Example 2:

[0031] Based on Embodiment 1, the plurality of micro rectangular electrical connectors are X-axis accumulator connector 4, Y-axis accumulator connector 5, Z-axis accumulator connector 6, external connector 7, navigation calculation board connector 8, I / F conversion board connector 9, and gyroscope connector 10. The output end of external connector 7 is electrically connected to the power supply pin of external connector 7. The output end of the two-output DC / DC power module 2 is electrically connected to the power supply pin of gyroscope connector 10. The output end of the three-output DC / DC power module 3 is electrically connected to the power supply pins of X-axis accumulator connector 4, Y-axis accumulator connector 5, Z-axis accumulator connector 6, navigation calculation board connector 8, and I / F conversion board connector 9, respectively.

[0032] Specifically, during use, external connector 7 is electrically connected to the system connector, X-axis accelerometer connector 4 is electrically connected to X-axis accelerometer 13, Y-axis accelerometer connector 5 is electrically connected to Y-axis accelerometer 14, Z-axis accelerometer connector 6 is electrically connected to Z-axis accelerometer 15, I / F conversion board connector 9 is electrically connected to I / F conversion board 19, gyroscope connector 10 is electrically connected to three-axis fiber optic gyroscope 12, and navigation calculation board connector 8 is electrically connected to navigation calculation board 18.

[0033] The power supply and interface board is designed based on the type and level of external input power voltage, the power requirements of the inertial sensors and hardware circuits, and the electrical interfaces. It not only provides operating power to the system but also manages the distribution of input and output data across the system's various electrical interfaces. The power supply function is implemented using filters and DC / DC power modules, providing the required DC power of ±15V, ±5V, and +5V to the fiber optic inertial navigation system. The electrical interface function is implemented using micro-rectangular electrical connectors, physically connecting the inertial sensors and hardware circuits and transmitting navigation calculation information to the external control computer.

[0034] See Figure 3 The dual-output DC / DC power module 2 is a power module that converts +27V to ±5V to supply power to the three-axis fiber optic gyroscope 12. Its model number is TDPBQZ28D5T.

[0035] The three-output DC / DC power module 3 is a power module that converts +27V to ±15V to supply power to the three-axis accelerometers (X-axis accelerometer 13, Y-axis accelerometer 14 and Z-axis accelerometer 15) and the I / F conversion board 19. It is also a power module that converts +27V to +5V to supply power to the I / F conversion board 19 and the navigation calculation board 18. Its model number is TDPIE28T515T.

[0036] External connector 7 connects to system connection cable 16, providing +27V power to the fiber optic inertial navigation system and providing CAN protocol navigation calculation data to the outside world. The model of external connector 7 is J30JZLN25ZKWA000, and the model of system connection cable 16 is J30JZ / XN25TJCAL01-150mm-30JZ / XN25TJCAL01.

[0037] The gyroscope connector 10 connects to the three-axis fiber optic gyroscope 12 via the gyroscope cable 11, providing ±5V power to the fiber optic gyroscope and inputting the angular velocity RS-422 signals RX+ and RX- to the power supply and interface board through the gyroscope connector 10. The gyroscope connector 10 is model J30JZLN9ZKWA000, and the gyroscope cable 11 is model J30JZ / XN9TJCAL01-100mm-30JZ / XN9TJCAL01.

[0038] X-axis accelerometer connector 4 connects to X-axis accelerometer 13 via its own J30JZ / XN9TJSAL01-100 connector. Y-axis accelerometer connector 5 connects to Y-axis accelerometer 14 via its own J30JZ / XN9TJSAL01-100 connector. Z-axis accelerometer connector 6 connects to Z-axis accelerometer 15 via its own J30JZ / XN9TJSAL01-100 connector. It supplies ±15V to each of the three accelerometers and inputs the three acceleration current signals IX, IY, and IZ to the power supply and interface board via X-axis accelerometer connector 4, Y-axis accelerometer connector 5, and Z-axis accelerometer connector 6. All three connectors are model J30JZLN9ZKWA000.

[0039] I / F converter board connector 9 connects to I / F converter board 19 via I / F converter board cable 20, supplying I / F converter board 19 with ±15V and +5V power. It inputs three linear acceleration current signals IX, IY, and IZ from the power supply and interface board to I / F converter board 19 via I / F converter board connector 9. It also inputs three linear acceleration frequency signals F1A and F1B, F2A and F2B, F3A and F3B, and the sampling frequency Fclk from I / F converter board 19 to the power supply and interface board via I / F converter board connector 9. The model of I / F converter board connector 9 is J30JZLN25ZKWA000, and the model of I / F converter board cable 20 is J30JZ / XN25TJCAL01-200mm-30JZ / XN25TJCAL01.

[0040] The navigation calculation board connector 8 is connected to the navigation calculation board 18 via the navigation calculation board cable 17, providing +5V power to the navigation calculation board 18, and inputting the angular velocity RS-422 signals RX+ and RX-, as well as the three linear acceleration frequency signals F1A and F1B, F2A and F2B, F3A and F3B, and the sampling frequency Fclk from the power supply and interface board to the navigation calculation board 18.

[0041] Preferably, the micro-rectangular electrical connector is a micro-rectangular bent-pin printed circuit board connector.

[0042] Specifically, the micro rectangular electrical connector is a micro rectangular bent-insert printed circuit board connector, which effectively reduces the size of the circuit board and meets the requirements of system miniaturization.

[0043] Preferably, the filter 1 is an EMI filter.

[0044] Specifically, an EMI filter is a filter that effectively suppresses high-frequency reflected noise from the system's input power supply, such as... Figure 3 As shown, the EMI filter is a filter that effectively suppresses high-frequency reflected noise from the +27V power supply input to the system. The EMI filter model is LFC2A5G, with a wide input voltage range of 16~40V, an output current of 2.5A, a PCB-mounted type, and a metal hermetically sealed housing. It is a high-reliability thick-film hybrid circuit.

[0045] Preferably, the plurality of micro rectangular electrical connectors are distributed along the edge of the base plate 21, and the filter 1, the two-output DC / DC power module 2 and the three-output DC / DC power module 3 are located inside the plurality of micro rectangular electrical connectors along the base plate 21. The filter 1 is located on the input side of the two-output DC / DC power module 2 and the input side of the three-output DC / DC power module 3.

[0046] Specifically, filter 1 is located on the input side of the two-output DC / DC power module 2 and the input side of the three-output DC / DC power module 3. It can effectively suppress the high-frequency reflection noise of the system input power supply and the high-frequency reflection noise of the power module power line, so that the noise reflection limit on the power line meets the relevant standard requirements.

[0047] Preferably, the micro rectangular bend printed circuit board connector is a J30JZ micro rectangular bend printed circuit board connector.

[0048] Specifically, compared with the conventional J30J micro rectangular bend-plug printed circuit board connector, the J30JZ micro rectangular bend-plug printed circuit board connector has a volume of only about 40% of the conventional J30J micro rectangular bend-plug printed circuit board connector, effectively reducing the circuit board size, and its structure is reasonable and reliable, and its performance indicators meet the usage requirements.

[0049] Preferably, the external connector 7 and the I / F conversion board connector 9 are 25-pin J30JZ micro rectangular bent plug printed circuit board connectors, the X-axis accelerator connector 4, the Y-axis accelerator connector 5, the Z-axis accelerator connector 6 and the gyroscope connector 10 are 9-pin J30JZ micro rectangular bent plug printed circuit board connectors, and the navigation calculation board connector 8 is a 31-pin J30JZ micro rectangular bent plug printed circuit board connector.

[0050] Specifically, based on the electrical interfaces of the inertial sensor and hardware circuit, 9-pin, 25-pin, and 31-pin J30JZ micro rectangular bend-plug printed circuit board connectors are configured to facilitate insertion, effectively reduce the size of the circuit board, and have a reasonable and reliable structure with performance indicators that meet the usage requirements.

[0051] Preferably, both the two-output DC / DC power module 2 and the three-output DC / DC power module 3 employ microelectronic surface mount technology.

[0052] Specifically, surface mount technology (SMT) significantly reduces the size and weight of electronic products. Surface mount components are typically only about 1 / 10 the size and weight of traditional through-hole components. With SMT, the size of electronic products can be reduced by 40%–60%, and the weight by 60%–80%. It also offers high reliability (strong vibration resistance and low solder joint defect rate), good high-frequency characteristics (reduced electromagnetic and radio frequency interference, faster signal transmission speed, lower transmission delay, faster operating speed, and significantly lower noise), ease of automation (greatly improved production efficiency, meeting the needs of large-scale electronic product production), cost reduction (30%–50% reduction due to reduced component size leading to less packaging material consumption, and increased yield due to higher automation), and savings in materials, energy, equipment, manpower, and time.

[0053] Preferably, both the two-output DC / DC power module 2 and the three-output DC / DC power module 3 are internally encapsulated with thermally conductive material.

[0054] Specifically, the power modules are internally encapsulated with thermally conductive materials, providing excellent sealing, superior insulation, and a stable thermal conductivity.

[0055] Preferably, both the two-output DC / DC power module 2 and the three-output DC / DC power module 3 are metal-encapsulated.

[0056] Specifically, power modules with metal encapsulation have good thermal conductivity and heat dissipation, good electrical conductivity, and high airtightness. They can effectively resist external electromagnetic interference, ensure the normal operation of the power supply, help improve the circuit's resistance to vibration and shock, withstand higher external pressure, and are suitable for high-voltage environments.

[0057] In the description of this utility model, it should be understood that if any terms or other indications refer to the orientation or positional relationship shown in the drawings, they are based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting this utility model.

[0058] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A power supply and interface board for fiber optic inertial navigation, characterized in that: Includes a base plate (21), a filter (1), a two-output DC / DC power module (2), a three-output DC / DC power module (3), and multiple micro rectangular electrical connectors; the filter (1), the two-output DC / DC power module (2), the three-output DC / DC power module (3) and the multiple micro rectangular electrical connectors are all connected to the base plate (21); the output end of the filter (1) is electrically connected to the input end of the two-output DC / DC power module (2) and the input end of the three-output DC / DC power module (3), and the input end of the filter (1), the output end of the two-output DC / DC power module (2) and the output end of the three-output DC / DC power module (3) are all electrically connected to one or more micro rectangular electrical connectors.

2. The power supply and interface board for fiber optic inertial navigation as described in claim 1, characterized in that: The multiple micro-rectangular electrical connectors are X-axis accelerator connector (4), Y-axis accelerator connector (5), Z-axis accelerator connector (6), external connector (7), navigation calculation board connector (8), I / F conversion board connector (9) and gyroscope connector (10). The output end of the external connector (7) is electrically connected to the power supply pin of the external connector (7). The output end of the two-way output DC / DC power module (2) is electrically connected to the power supply pin of the gyroscope connector (10). The output end of the three-way output DC / DC power module (3) is electrically connected to the power supply pin of the X-axis accelerator connector (4), the power supply pin of the Y-axis accelerator connector (5), the power supply pin of the Z-axis accelerator connector (6), the power supply pin of the navigation calculation board connector (8) and the power supply pin of the I / F conversion board connector (9), respectively.

3. The power supply and interface board for fiber optic inertial navigation as described in claim 2, characterized in that: The micro rectangular electrical connector is a micro rectangular bent-insert printed circuit board connector.

4. The power supply and interface board for fiber optic inertial navigation as described in claim 1, characterized in that: The filter (1) is an EMI filter.

5. The power supply and interface board for fiber optic inertial navigation as described in claim 1, characterized in that: The multiple micro-rectangular electrical connectors are distributed along the edge of the base plate (21). The filter (1), the two-output DC / DC power module (2) and the three-output DC / DC power module (3) are located inside the multiple micro-rectangular electrical connectors along the base plate (21). The filter (1) is located on the input side of the two-output DC / DC power module (2) and the input side of the three-output DC / DC power module (3).

6. The power supply and interface board for fiber optic inertial navigation as described in claim 3, characterized in that: The micro rectangular bend-plug printed circuit board connector is the J30JZ micro rectangular bend-plug printed circuit board connector.

7. The power supply and interface board for fiber optic inertial navigation as described in claim 6, characterized in that: The external connector (7) and I / F conversion board connector (9) are 25-pin J30JZ micro rectangular bent plug printed circuit board connectors, the X-axis accelerator connector (4), Y-axis accelerator connector (5), Z-axis accelerator connector (6) and gyroscope connector (10) are 9-pin J30JZ micro rectangular bent plug printed circuit board connectors, and the navigation calculation board connector (8) is a 31-pin J30JZ micro rectangular bent plug printed circuit board connector.

8. The power supply and interface board for fiber optic inertial navigation as described in claim 1, characterized in that: Both the two-output DC / DC power module (2) and the three-output DC / DC power module (3) adopt microelectronic surface mount technology.

9. The power supply and interface board for fiber optic inertial navigation as described in claim 1, characterized in that: Both the two-output DC / DC power module (2) and the three-output DC / DC power module (3) are internally encapsulated with thermally conductive material.

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