A fiber-optic gyroscope signal processing circuit board assembly

Abstract

This invention discloses a fiber optic gyroscope signal processing circuit board assembly, specifically relating to the field of fiber optic gyroscope circuit board technology. It includes a circuit board substrate, multiple fiber optic connectors, pressure posts, a positioning shaft, and crossbars. Multiple fiber optic connectors are located on the top of the circuit board substrate, with pressure posts fixed to both sides of each connector. The positioning shaft is located on one side of the pressure posts, and two rotatably connected crossbars are mounted on its outer wall. This invention enables a synergistic effect between internal and external forces when the circuit board substrate temperature rises during use, generating a cross force. This cross force has a large opening, suitable for floating reinforcement of the pressure posts in multiple vertical directions, significantly improving the connection reliability of the fiber optic gyroscope signal processing circuit board assembly under thermal conditions. This solves the problem in existing technologies where it is difficult to automatically compensate for connector tightening forces during temperature rises, leading to decreased contact reliability and increased circuit board assembly failure rate.

Description

Technical Field

[0001] This invention relates to the field of fiber optic gyroscope circuit board technology, and more specifically, to a fiber optic gyroscope signal processing circuit board assembly. Background Technology

[0002] The fiber optic gyroscope signal processing circuit board assembly in the printed circuit is a key component of the fiber optic gyroscope. It is responsible for receiving the changes in optical signals generated by the rotation of the fiber optic loop and converting the optical signals into accurate angular velocity information through the signal processing flow of the circuit board.

[0003] According to the published patent publication number CN103796427A, a printed circuit board assembly for a control device, a control device and a signal processing apparatus are disclosed, which discloses that the connection end components are arranged in a common clamp, the contact pins are electrically and mechanically connected to the connection end section, and the first and second plug connectors are arranged in a stacking direction inclined to the main extension plane of the main section and connected to each other, such that the first plug connector arrangement has a greater distance from the main section than the second plug connector arrangement. The curved connection section is semi-flexibly constructed, but the following problems still exist.

[0004] The fiber optic gyroscope signal processing circuit board generates significant heat during operation and is susceptible to external vibrations. The welding or adhesive connection at the fiber optic connector is prone to loosening due to high-temperature aging. The existing structure lacks a high-temperature adaptive cross-force reinforcement mechanism, making it difficult to automatically compensate for the connector tightening force when the temperature rises. This leads to a decrease in contact reliability and an increase in the failure rate of the fiber optic gyroscope signal processing circuit board assembly. Summary of the Invention

[0005] To overcome the above-mentioned deficiencies of the prior art, the present invention proposes the following technical solution: a fiber optic gyroscope signal processing circuit board assembly, including a circuit board substrate, wherein a plurality of fiber optic connectors are provided on the top of the circuit board substrate, and pressure posts are fixed on both sides of each fiber optic connector. A positioning shaft is located on one side of the pressure column, and two rotatably connected cross bars are installed on the outer wall of the positioning shaft; The self-adjusting outer component is installed on one side of the outer wall of the positioning shaft and located on the side of the cross bar. The self-adjusting internal component is installed on the other side of the outer wall of the positioning shaft and located on one side of the cross bar; When the temperature of the circuit board rises, the self-adjusting outer component expands due to heat and pushes against the outer walls of the two cross strips. At the same time, the self-adjusting inner component contracts after being heated and pulls the inner walls of the two cross strips, causing the two cross strips to rotate relative to each other and jointly apply cross-compression force to the pressure column to compensate for the loosening of the fiber optic connector under high temperature.

[0006] In a preferred embodiment, the self-adjusting external component includes: The outer strip is fixed to one side of the outer wall of the positioning shaft and located on one side of the cross strip. A vertical expansion strip is fixedly connected to one side of the outer strip. Multiple slots are provided on both sides of the vertical expansion bar. The top and bottom ends of the vertical expansion bar are fixedly connected to side expansion bars. The side expansion bars are at right angles to the slots. A bevel strip is installed at one end of the side expansion strip, and both the cross strip and the side expansion strip are fixedly connected to the bevel strip.

[0007] In a preferred embodiment, both the vertical expansion strip and the side expansion strip are made of brass, and both the vertical expansion strip and the side expansion strip expand when heated.

[0008] In a preferred embodiment, the two side expansion strips are arranged symmetrically about the vertical expansion strip, and the pressure strip is arranged at an angle.

[0009] In a preferred embodiment, limit rings are installed on opposite sides of the two intersecting bars, and both limit rings are fixedly connected to the positioning shaft, while the limit rings are rotatably connected to the intersecting bars.

[0010] In a preferred embodiment, the outer wall of the pressure column is provided with a guide groove, which is used to limit the cross bar, and the cross bar is slidably connected to the pressure column to which the guide groove belongs.

[0011] In a preferred embodiment, the self-adjusting internal component includes: An inner strip is fixedly installed on the other side of the outer wall of the positioning shaft and located on one side of the cross strip. An inner toothed ring is fixedly connected to one side of the inner strip. A folded strip is fixedly connected to the top and bottom of the inner toothed ring. An angle is provided between the inner toothed ring and the folded strip. A connecting strip is installed at one end of the folding strip, and both the cross strip and the folding strip are fixedly connected to the connecting strip; Multiple shrinkage grooves are formed on the inner wall of the inner shrinkage toothed ring, and both the inner shrinkage toothed ring and the shrinkage strip are made of graphene material.

[0012] In a preferred embodiment, the two folded strips are symmetrically arranged about the inner folded tooth ring; The multiple shrinkage grooves are arranged in a circumferential distribution.

[0013] In a preferred embodiment, one end of the pressure post is provided with a support bar, one end of the optical fiber connector is connected to a receiving end, both the pressure post and the receiving end are fixedly connected to the support bar, and the receiving end is fixedly connected to the circuit board.

[0014] In a preferred embodiment, a signal line is connected to the other end of the optical fiber connector, and an output terminal is provided below the signal line, which is fixedly connected to the circuit board.

[0015] The technical effects and advantages of the present invention.

[0016] 1. When the circuit board is in use, the temperature rises, the self-adjusting outer component expands due to heat and pushes against the outer wall of the cross bar, and the self-adjusting inner component contracts due to heat and pulls the inner wall of the cross bar, forming a synergistic effect between the inside and outside. This drives the two cross bars to rotate relative to each other and apply cross-compression force to the pressure column. Moreover, the cross force can form a floating reinforcement effect in multiple vertical positions of the pressure column, realizing automatic compensation for the fastening force of the fiber optic connector under high temperature environment, and significantly improving the connection reliability of the fiber optic gyroscope signal processing circuit board assembly under thermal conditions.

[0017] 2. This invention employs a self-adjusting external component composed of vertical expansion strips, side expansion strips, and inclined pressure strips. The vertical and side expansion strips are both made of brass. Upon heating, they expand and, through the inclined pressure strips, tilt and compress the outer wall of the cross strips. Combined with the guiding and limiting effects of the limiting rings and guide grooves, this ensures that the cross strips form a stable cross-limiting compression on the pressure column. This structure actively enhances the fastening force of the fiber optic connector at high temperatures, reducing the failure rate caused by the superposition of vibration and thermal stress.

[0018] 3. This invention utilizes self-adjusting internal components. The inner shrinking toothed ring and shrinking strip shrink and pull the connecting strip after being heated, thereby pulling the inner wall of the cross strip to rotate relative to each other. This applies cross-compression force to the pressure column from the inside, forming a bidirectional adaptive fastening with the external expansion action. This further improves the contact stability of the fiber optic connector in high-temperature vibration environments and extends the service life of the circuit board assembly. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the fiber optic gyroscope signal processing circuit board assembly of the present invention.

[0020] Figure 2 This is a schematic diagram of a partial structure cut off at the connection between the signal line and the optical fiber connector of the present invention.

[0021] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point B.

[0022] Figure 4 This is a top view of the connection between the positioning shaft and the limiting ring of the present invention.

[0023] Figure 5 This is a partial structural diagram of the vertical cross-section of the receiving end of the present invention.

[0024] Figure 6 This is a partial structural diagram of the vertical cross-section at the connection between the positioning shaft and the cross bar of the present invention.

[0025] Figure 7 This is a partial structural diagram of the vertical cross-section at the connection between the inner strip and the inner toothed ring of the present invention.

[0026] Figure 8 For the present invention Figure 1 Enlarged structural diagram at point A in the middle.

[0027] The attached diagram is labeled as follows: 1. Circuit board; 2. Fiber optic connector; 3. Pressure post; 4. Positioning shaft; 5. Cross bar; 6. Output end; 7. Outer bar; 8. Vertical expansion bar; 9. Groove; 10. Side expansion bar; 11. Pressure bar; 12. Limiting ring; 13. Guide groove; 14. Inner bar; 15. Inner retraction toothed ring; 16. Retraction bar; 17. Connecting bar; 18. Retraction groove; 19. Support bar; 20. Receiver end; 21. Signal line. Detailed Implementation

[0028] The technical solution will now be described in detail and completely with reference to the embodiments and accompanying drawings of the present invention. Example 1

[0029] like Figure 1 - Figure 4 The fiber optic gyroscope signal processing circuit board assembly shown includes a circuit board 1, with multiple fiber optic connectors 2 on the top of the circuit board 1, and pressure posts 3 fixed on both sides of each fiber optic connector 2; a positioning shaft 4, disposed on one side of the pressure posts 3, with two rotatably connected cross bars 5 mounted on the outer wall of the positioning shaft 4; a self-adjusting outer component, installed on one side of the outer wall of the positioning shaft 4 and located on one side of the cross bars 5; and a self-adjusting inner component, installed on the other side of the outer wall of the positioning shaft 4 and located on one side of the cross bars 5.

[0030] The principle of this embodiment is that when the temperature of the circuit board 1 rises, the self-adjusting outer component expands due to heat and pushes against the outer wall of the two cross strips 5. At the same time, the self-adjusting inner component contracts after being heated and pulls the inner wall of the two cross strips 5, causing the two cross strips 5 to rotate relative to each other and jointly apply cross-compression force to the pressure column 3 to compensate for the loosening of the fiber optic connector 2 under high temperature. This synergistic effect of internal heat contraction and external heat expansion provides relative rotational force to the two cross strips 5, which in turn jointly apply cross-compression force to the pressure column 3. This allows the pressure column 3 to achieve cross-force coverage at different positions during vibration or loosening, providing cross-assisted fastening force to the fiber optic connector 2 during use. This process realizes automatic compensation of the fastening force of the fiber optic connector 2 when the temperature rises, realizing high-temperature adaptive cross-force reinforcement, which greatly improves the connection reliability of the fiber optic connector 2 in high-temperature environments and reduces the probability of failure caused by connector loosening due to high temperature. Example 2

[0031] When using this technology, such as Figure 3As shown, the self-adjusting external component includes: an outer strip 7, fixed to one side of the outer wall of the positioning shaft 4 and located on one side of the cross strip 5, with a vertical expansion strip 8 fixedly connected to one side of the outer strip 7; multiple slots 9, all opened on both sides of the vertical expansion strip 8, with side expansion strips 10 fixedly connected to the top and bottom ends of the vertical expansion strip 8, and a right angle between the side expansion strip 10 and the slot 9; and a pressure strip 11, installed at one end of the side expansion strip 10, with both the cross strip 5 and the side expansion strip 10 fixedly connected to the pressure strip 11. Both the vertical expansion strip 8 and the side expansion strip 10 are made of brass and both expand when heated. The two side expansion strips 10 are symmetrically arranged about the vertical expansion strip 8, and the pressure strip 11 is inclined.

[0032] When using this technology, such as Figure 4 As shown, limit rings 12 are installed on opposite sides of the two intersecting bars 5. Both limit rings 12 are fixedly connected to the positioning shaft 4, and the limit rings 12 are rotatably connected to the intersecting bars 5. The two limit rings 12 limit the rotation of the two intersecting bars 5 on the outer wall of the positioning shaft 4, thereby raising the two intersecting bars 5 to perform a cross-limiting operation on the pressure column 3.

[0033] When using this technology, such as Figure 3 As shown, a guide groove 13 is provided on the outer wall of the pressure column 3. The guide groove 13 is used to limit the cross bars 5. The cross bars 5 are slidably connected to the pressure column 3 to which the guide groove 13 belongs. By the two cross bars 5 in the limiting area of ​​the guide groove 13, it is ensured that the two cross bars 5 laterally limit and squeeze the pressure column 3.

[0034] In this embodiment, when the circuit board 1 is at a high temperature, the high-temperature heat comes into contact with the vertical expansion strip 8 and the two side expansion strips 10. The vertical expansion strip 8 and the side expansion strips 10 are both made of brass and have thermal expansion function. The outer strip 7 is supported by the positioning shaft 4, and the outer strip 7 supports the vertical expansion strip 8. Multiple slots 9 on the vertical expansion strip 8 form a vertical expansion. At the same time, the vertical expansion strip 8 provides a vertical expansion force to the two side expansion strips 10. The two side expansion strips 10 expand and unfold after being heated. In this way, the side expansion strips 10 squeeze the inclined strip 11. The inclined strip 11 is inclined and squeezed on the cross strip 5. The two inclined strips 11 squeeze the outer walls of the two cross strips 5 respectively. This pushes against the outer walls of the two cross strips 5. The cross strip 5 rotates counterclockwise along the outer wall of the positioning shaft 4, while the other cross strip 5 rotates clockwise along the outer wall of the positioning shaft 4. At the same time, the two limiting rings 12 limit the rotation of the two cross strips 5 on the outer wall of the positioning shaft 4. The two cross strips 5 are in the limiting area of ​​the guide groove 13, so that the two cross strips 5 squeeze the outer wall of the pressure column 3 and cross-limit squeeze the outer wall of the pressure column 3, increasing the power of the pressure column 3 to squeeze the fiber optic connector 2. The fiber optic connector 2 and the receiver 20 automatically cross-compensate the fastening force of the fiber optic connector 2 in the high temperature environment. Example 3

[0035] When using this technology, such as Figure 3 - Figure 7 As shown, the self-adjusting internal components include: an inner strip 14, fixedly installed on the other side of the outer wall of the positioning shaft 4 and located on one side of the cross strip 5; an inner retraction toothed ring 15 is fixedly connected to one side of the inner strip 14; retraction strips 16 are fixedly connected to the top and bottom ends of the inner retraction toothed ring 15; an angle is provided between the inner retraction toothed ring 15 and the retraction strips 16; a connecting strip 17, installed at one end of the retraction strip 16; both the cross strip 5 and the retraction strip 16 are fixedly connected to the connecting strip 17; and retraction grooves 18, all formed on the inner wall of the inner retraction toothed ring 15. Both the inner retraction toothed ring 15 and the retraction strips 16 are made of graphene. The two retraction strips 16 are symmetrically arranged about the inner retraction toothed ring 15; and the multiple retraction grooves 18 are arranged in a circumferential distribution.

[0036] The principle of this embodiment is that since both the shrinking strip 16 and the inner shrinking toothed ring 15 are made of graphene, they have negative expansion characteristics and therefore have a thermal shrinking function. The inner strip 14 is supported by the pressure column 3, and the inner strip 14 supports the inner shrinking toothed ring 15. When the inner shrinking toothed ring 15 is heated, it begins to shrink, so that the multiple shrinking grooves 18 on the inner shrinking toothed ring 15 also form a shrinking state. In this way, the two ends of the inner shrinking toothed ring 15 respectively pull the two shrinking strips 16 closer to each other. At the same time, the shrinking strips 16 themselves will also bend and shrink when heated. In this way, the shrinking strips 16 pull the connecting strips 17, and the two connecting strips 17 respectively pull the inner walls of the two intersecting strips 5, so that the two intersecting strips 5 rotate relative to each other and jointly apply cross-compression force to the pressure column 3. The pressure column 3 drives the fiber optic connector 2 to move to the left and compress. This process realizes automatic compensation of the fastening force of the fiber optic connector 2 when the temperature rises. Example 4

[0037] When using this technology, such as Figure 1 - Figure 8 As shown, one end of the pressure post 3 is provided with a support strip 19, and one end of the fiber optic connector 2 is connected to a receiving end 20. Both the pressure post 3 and the receiving end 20 are fixedly connected to the support strip 19, and the receiving end 20 is fixedly connected to the circuit board 1. The other end of the fiber optic connector 2 is connected to a signal line 21, and an output end 6 is provided below the signal line 21. The output end 6 is fixedly connected to the circuit board 1.

[0038] In this embodiment, the receiving end 20 supports the support bar 19, which in turn supports the pressure column 3, improving the stability of the pressure column 3. The attitude signal acquired by the fiber optic gyroscope is transmitted to the fiber optic connector 2 via the signal line 21, and then sent to the receiving end 20 through the fiber optic connector 2. After receiving and initially conditioning the signal, the receiving end 20 transmits it to the circuit board 1. The circuit board 1 analyzes, calculates, and processes the signal, where the analysis, calculation, and processing steps are common steps. Finally, the processed valid signal is output to the external supporting equipment through the output end 6, completing the normal signal processing operation of the fiber optic gyroscope.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, or improvements made within the technical concept and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fiber optic gyroscope signal processing circuit board assembly, comprising a circuit board (1), wherein a plurality of fiber optic connectors (2) are disposed on the top of the circuit board (1), characterized in that: Each of the fiber optic connectors (2) has a pressure post (3) fixed on both sides. The positioning shaft (4) is set on one side of the pressure column (3), and two rotatably connected cross bars (5) are installed on the outer wall of the positioning shaft (4). The self-adjusting outer part is installed on one side of the outer wall of the positioning shaft (4) and located on one side of the cross bar (5); The self-adjusting inner part is installed on the other side of the outer wall of the positioning shaft (4) and located on one side of the cross bar (5); When the temperature of the circuit board (1) rises, the self-adjusting outer part expands due to heat and pushes against the outer wall of the two cross strips (5). At the same time, the self-adjusting inner part contracts after being heated and pulls the inner wall of the two cross strips (5), so that the two cross strips (5) rotate relative to each other and jointly apply cross squeezing force to the pressure column (3) to compensate for the loosening of the fiber optic connector (2) under high temperature.

2. The fiber optic gyroscope signal processing circuit board assembly according to claim 1, characterized in that: The self-adjusting external component includes: The outer strip (7) is fixed to one side of the outer wall of the positioning shaft (4) and located on one side of the cross strip (5). A vertical expansion strip (8) is fixedly connected to one side of the outer strip (7). Multiple slots (9) are opened on both sides of the vertical expansion strip (8). The top and bottom ends of the vertical expansion strip (8) are fixedly connected to side expansion strips (10). The side expansion strips (10) and the slots (9) are at right angles. The pressure strip (11) is installed at one end of the side expansion strip (10), and the cross strip (5) and the side expansion strip (10) are both fixedly connected to the pressure strip (11).

3. The fiber optic gyroscope signal processing circuit board assembly according to claim 2, characterized in that: The vertical expansion bar (8) and the side expansion bar (10) are both made of brass and both expand when heated.

4. The fiber optic gyroscope signal processing circuit board assembly according to claim 2, characterized in that: The two side expansion strips (10) are symmetrically arranged about the vertical expansion strip (8), and the pressure strip (11) is inclined.

5. The fiber optic gyroscope signal processing circuit board assembly according to claim 1, characterized in that: Limiting rings (12) are installed on opposite sides of the two cross bars (5), and the two limiting rings (12) are fixedly connected to the positioning shaft (4). The limiting rings (12) are rotatably connected to the cross bars (5).

6. The fiber optic gyroscope signal processing circuit board assembly according to claim 1, characterized in that: The outer wall of the pressure column (3) is provided with a guide groove (13), which is used to limit the cross bar (5). The cross bar (5) and the pressure column (3) to which the guide groove (13) belongs are slidably connected.

7. The fiber optic gyroscope signal processing circuit board assembly according to claim 1, characterized in that: The self-adjusting internal component includes: The inner strip (14) is fixedly installed on the other side of the outer wall of the positioning shaft (4) and located on one side of the cross strip (5). An inner toothed ring (15) is fixedly connected to one side of the inner strip (14). A folded strip (16) is fixedly connected to the top and bottom of the inner toothed ring (15). An angle is provided between the inner toothed ring (15) and the folded strip (16). A connecting strip (17) is installed at one end of a folding strip (16), and both the cross strip (5) and the folding strip (16) are fixedly connected to the connecting strip (17); Multiple shrinkage grooves (18) are formed on the inner wall of the inner shrinkage toothed ring (15), and the inner shrinkage toothed ring (15) and the shrinkage strip (16) are both made of graphene material.

8. The fiber optic gyroscope signal processing circuit board assembly according to claim 7, characterized in that: The two folded strips (16) are symmetrically arranged about the inner folded toothed ring (15); The multiple shrinkage grooves (18) are arranged in a circular distribution.

9. The fiber optic gyroscope signal processing circuit board assembly according to claim 7, characterized in that: One end of the pressure post (3) is provided with a support bar (19), and one end of the optical fiber connector (2) is connected to a receiving end (20). The pressure post (3) and the receiving end (20) are both fixedly connected to the support bar (19), and the receiving end (20) is fixedly connected to the circuit board (1).

10. The fiber optic gyroscope signal processing circuit board assembly according to claim 1, characterized in that: The other end of the fiber optic connector (2) is connected to a signal line (21), and an output terminal (6) is provided below the signal line (21). The output terminal (6) is fixedly connected to the circuit board (1).

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