A digital laser gyroscope based on modular electrical connections

Abstract

The application belongs to the technical field of ring laser gyroscopes, and discloses a digital laser gyroscope based on modular electrical connection. The digital laser gyroscope comprises a base, a gyroscope sensor, a power strip, a heat insulation plate, a control circuit board and an upper cover plate. The base is a single-face-opening round cake-shaped shell, and the gyroscope sensor is fixed in the base. The heat insulation plate, the control circuit board and the upper cover plate are sequentially arranged above the gyroscope sensor. The gyroscope sensor is electrically connected with the heat insulation plate through the power strip, the heat insulation plate is electrically connected with the control circuit board through the plug-in mode, and the upper cover plate is fixed with the base through screws to seal other devices in the shell.

Description

Technical Field

[0001] This invention belongs to the field of ring laser gyroscope technology, specifically relating to a digital laser gyroscope based on modular electrical connections. Background Technology

[0002] Laser gyroscopes based on the Sagnac effect are widely used as angular velocity measurement devices in various inertial navigation systems in aviation, aerospace, and marine industries. Among them, the jitter laser gyroscope is the most widely used type of gyroscope. It uses a jitter frequency mechanism to keep the gyroscope operating outside the lock zone, achieving angular rate sensitivity. A typical jitter digital laser gyroscope includes: a ring laser sensor assembly, a jitter wheel assembly, a gyroscope signal processing circuit, a heat shield assembly, a housing assembly, and a shielding assembly. Its main feature is that it integrates the laser gyroscope body and its control circuit into a single unit, achieving miniaturization and integration while facilitating installation and replacement within the IMU (Inertial Measurement Unit).

[0003] The electrical connections of a jittery digital laser gyroscope include the connection between the gyroscope body and the circuitry, as well as the connection between the circuitry and the external housing. The connection between the gyroscope body and the circuitry is more complex, mainly involving power supply and signal output. Specifically, this includes: power supply to the gyroscope electrodes, power supply and signal acquisition for the frequency shifting component, power supply to the phototube, power supply and signal acquisition for the gyroscope output signal, power supply and signal acquisition for the frequency stabilization component, power supply for the ignition lamp, power supply and signal acquisition for the temperature sensor, etc. A reasonable electrical connection method will determine many aspects of the digital laser gyroscope, such as its overall spatial dimensions, assembly efficiency, thermal uniformity within the space, and environmental adaptability. Currently, the electrical connections of jittery digital laser gyroscopes mostly adopt the method of internal wiring and pad connection. The main drawbacks of this method are:

[0004] 1. The solder pads have a limited lifespan. When the housing is replaced multiple times with the gyroscope cavity, there is a risk to the lifespan of the pads, or it may result in a waste of resources.

[0005] 2. The wiring inside the shell and the soldering of components both require a large number of manual processes, which increases the production cycle of digital gyroscopes;

[0006] 3. Digital gyroscope wiring is complex, requires a high degree of manual intervention, and has a low fault tolerance rate; when the gyroscope body needs to be replaced due to repair or debugging, the electrical assembly process increases labor costs and replacement cycle. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a digital laser gyroscope based on modular electrical connections. By integrating various power supply and signal lines of the gyroscope onto the gyroscope cavity and using an integrated pluggable connection method to connect with the heat insulation plate and control circuit, the invention eliminates the need for shell wiring, welding, and other processes. This is of great significance for improving the reliability of digital laser gyroscopes, shortening the assembly cycle, and reducing labor costs.

[0008] A digital laser gyroscope based on modular electrical connections includes: a base, a gyroscope sensor, a power strip, a heat insulation plate, a control circuit board, and a top cover.

[0009] The base is a disc-shaped shell with an opening on one side, and the gyroscope sensor is fixed inside the base;

[0010] A heat insulation plate, a control circuit board, and a top cover are sequentially arranged above the gyroscope sensor.

[0011] The gyroscope sensor is electrically connected to the heat insulation plate via a connector, and the heat insulation plate is electrically connected to the control circuit board via a plug-in connection.

[0012] The top cover is fixed to the base with screws to enclose other components inside the housing.

[0013] Furthermore, the gyroscope sensor includes a glass resonant cavity and a cathode, an anode, an optical signal reading device, a frequency stabilization component, and a jitter wheel disposed in a through hole in the middle of the glass resonant cavity, all disposed on the surface of the glass resonant cavity.

[0014] The surface of the glass resonant cavity is provided with slot A and slot B;

[0015] The A-type connector slot has a central pin hole in the middle and three pairs of pin holes at each of the left and right ends;

[0016] Each of the left and right ends of the B-type connector slot is provided with an edge pin hole and two pairs of paired pin holes;

[0017] The cathode is connected to the central pin hole of slot A through conductive groove A;

[0018] The two anodes are respectively connected to the edge pin holes at both ends of the B connector slot through two B conductive grooves;

[0019] The wires led out from the optical signal reading device are connected to the pin holes on the opposite side from the cathode in the paired pin holes at both ends of the A-type connector slot through pins;

[0020] The wires leading out from the jitter wheel and frequency stabilization component are connected to the paired pin holes of the B connector slot through pins.

[0021] Furthermore, the power strip is divided into power strip A and power strip B;

[0022] The power strip includes a power strip bracket and pins and flexible film cables located on the upper and lower sides of the power strip bracket;

[0023] The pins on the power strip are used to connect to the pin holes on slots A and B;

[0024] Flexible film cables are used to connect to the underside of the insulation panel.

[0025] Furthermore, the upper surface of the heat insulation board is provided with two heat insulation board plugs for connecting to the plugs on the control circuit board; the lower surface of the heat insulation board is provided with a transition bracket integrated with the heat insulation board plugs for connecting to the flexible film cable.

[0026] Furthermore, the heat insulation plate is provided with two ignition lamps on the side near the gyroscope sensor, and the ignition lamps are located next to the cathode of the gyroscope sensor.

[0027] Furthermore, a temperature sensor is also provided on the side of the heat insulation plate near the gyroscope sensor to detect the temperature of the gyroscope sensor.

[0028] Furthermore, the interiors of the A and B conductive grooves are plated with nickel-chromium-gold.

[0029] Furthermore, each pair of pin holes in the A and B socket slots is interconnected and plated with nickel-chromium-gold.

[0030] One of the paired pin holes connects to a pin on the power strip, and the other pin hole connects to a device lead on the gyroscope sensor.

[0031] Beneficial effects: This application proposes a digital laser gyroscope based on modular electrical connections, which can be used in the overall design of digital laser gyroscopes. It plays a significant role in realizing the miniaturization and integration of digital laser gyroscopes, improving gyroscope reliability, and enhancing assembly efficiency. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings will be described below.

[0033] Figure 1 This is the overall assembly drawing;

[0034] Figure 2 Side view of the resonant cavity;

[0035] Figure 3 This is a side view of the power strip;

[0036] Figure 4 This is a side view of the insulation panel;

[0037] Figure 5 This is a side view of the bottom surface of the insulation board;

[0038] Figure 6 Side view of the control circuit board;

[0039] Figure 7 Test bottom shell side view;

[0040] The components are as follows: 1-Test base shell, 2-Resonant cavity, 3-Plug in, 4-Heat insulation plate, 5-Control circuit board, 6-Cathode, 7-Cavity, 8-Anode, 9-Optical signal reading device, 10-Frequency stabilization component, 11-Shaking wheel, 12-A conductive groove, 13-B conductive groove, 14-A plug in groove, 15-A pin hole group, 16-B plug in groove, 17-B pin hole group, 18-A pin hole, 19-B pin hole, 20-Pin, 21-Flexible thin film cable, 22-Plug in bracket, 23-Heat insulation plate plug in, 24-Heat insulation plate positioning hole, 25-Ignition lamp, 26-Transition bracket, 27-Temperature sensor, 28-Circuit board plug in, 29-Circuit board positioning hole, 30-Shaking wheel mounting post, 31-Mounting platform, 32-Top cover. Detailed Implementation

[0041] To make the technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail and completely below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0042] The present invention will now be described in further detail with reference to the accompanying drawings:

[0043] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 As shown, the modular electrical connection scheme for a digital laser gyroscope of the present invention includes a housing base 1, a resonant cavity 2, a power strip 3, a heat insulation plate 4, a control circuit board 5, and a top cover 32. In this embodiment, the attached... Figure 1 The diagram shows the overall electrical connection scheme. The resonant cavity 2 serves as the laser gyroscope body and is mounted on the housing base 1. It is connected to the heat insulation plate 4 via the plug 3. The heat insulation plate 4 is connected to the control circuit board 5 via a plug-in method. The control circuit board 5 and the heat insulation plate 4 are connected to the housing base 1 with screws to complete the fixation. The top cover 32 is connected to the base 1.

[0044] Appendix Figure 2 This is a schematic diagram of the resonant cavity 2. The resonant cavity 2, as a key component of the laser gyroscope, is a crucial sensor for sensitive comparison rates. It includes a cavity 7, a cathode 6, an anode 8, a jitter wheel 11, an optical signal reading device 9, and a frequency stabilization component 10. A feature of this invention is that it includes an attached... Figure 2The cathode 6, anode 8, jitter wheel 11, optical signal reading device 9, and frequency stabilization component 10 are all integrated on the upper surface of the cavity 7. Specifically, the A-type connector slot 14 and B-type connector slot 16 are connected to the connector 3, and their sizes match those of the connector 3, allowing for direct plug-in connection. Each connector slot contains pin holes; except for the pin holes connected to the cathode 6 and anode 8, the remaining pin holes are arranged in pairs. Each pair of holes is connected on the upper surface of the cavity via a nickel-chromium-gold plated groove, achieving conductivity. The cathode 6 is connected to the A-type pin hole 18 in the A-type connector slot 14 via the A-type conductive groove 12, and the anode 8 is connected to the B-type pin hole 19 in the B-type connector slot 16 via the B-type conductive groove 13. The conductive grooves are plated with nickel-chromium-gold, a material with advantages such as corrosion resistance and high conductivity, making it a good signal transmission medium. The surface of the grooves is encapsulated with low-stress adhesive for safety protection. The wires leading from the optical signal reading device 9 have pins installed at their ends, which are then connected to the holes in pin group A 15 away from the cathode using a locking mechanism. Similarly, the wires from the jitter wheel 11 and the frequency stabilization component 10 have pins installed at their ends, which are then connected to pin group B 17 using a locking mechanism. The pin holes are distributed vertically in pin slot B 16 according to the wire position, enabling proximity-based connection.

[0045] Appendix Figure 3 The diagram shows the power strip 3, where the pins 20 are connected to the sockets in the A power strip slot 14 and the B power strip slot 16. The flexible film cable 21 is connected to the lower surface of the heat insulation plate 4. The flexible film cable 21 is made of ultra-flexible material. Its main function is to avoid a rigid connection between the resonant cavity 2 and the heat insulation plate 4, thereby ensuring that the jitter performance of the jittering laser gyroscope is not disturbed. The power strip bracket 22 is embedded in the A power strip slot 14 and the B power strip slot 16 to achieve a stabilizing effect.

[0046] Appendix Figure 4 The diagram shows the heat insulation plate 4. Since the laser gyroscope is a high-precision photoelectric sensor, it is highly sensitive to temperature changes. Because the laser gyroscope requires high-voltage power, and the control circuit board 5 contains a transformer that generates significant heat, the heat insulation plate 4 serves to prevent the heat generated by the control circuit board 5 from affecting the resonant cavity 2. It is made of a material with strong heat insulation properties. Two heat insulation plate connectors 23 on its upper surface are connected to the connectors on the lower surface of the control circuit board 5 to enable signal conduction. The heat insulation plate positioning holes 24 are connected to the mounting platform 31 on the housing base 1 via screws for fixing the heat insulation plate. Further analysis of the heat insulation plate, its structure near the resonant cavity 2, is shown in the attached diagram. Figure 5 As shown, it includes two ignition lamps 25, which are located close to the cathode 6 of the resonant cavity to achieve dual-arm discharge-assisted ignition of the resonant cavity. The temperature sensor 27 is used to monitor the temperature of the digital laser gyroscope. The transition bracket 26 is connected to the flexible thin film cable 21 of the plug-in 3 to realize signal transmission.

[0047] Appendix Figure 6The schematic diagram of the control circuit board shows two circuit board connectors 28 on the side near the heat insulation plate 4, which are connected to the heat insulation plate connector 23 via a snap-fit ​​connection. The circuit board positioning holes 29 are connected to the heat insulation plate 4 together with the mounting platform 31 on the housing base 1 via screws for a secure connection.

[0048] Appendix Figure 7 The diagram shows the base 1 of the housing, in which the vibrating wheel mounting post 30 is used to fix the vibrating wheel 11 of the resonant cavity 2, and the mounting platform 31 is connected to the positioning hole 24 of the heat insulation plate to fix the heat insulation plate.

[0049] This invention presents a modular electrical connection scheme for digital laser gyroscopes. All power supply and signal lines for the laser gyroscope resonant cavity are integrated onto the upper surface of the cavity and connected to a heat insulation plate and control circuit board via a connector. The gyroscope cathode and anode are directly electrically connected via nickel-chromium-gold plated conductive grooves on the cavity surface. The remaining wires are integrated onto the cavity surface via pins and connected to the connector via conductive grooves. The connector on the resonant cavity is connected to the heat insulation plate via a flexible thin-film cable, ensuring the gyroscope's jitter performance. This novel electrical connection scheme for digital laser gyroscopes eliminates the need for shell wiring, manual electrical assembly, and wire soldering, significantly improving the overall reliability of digital laser gyroscopes, shortening assembly cycles, and reducing labor costs.

Claims

1. A digital laser gyroscope based on modular electrical connections, characterized by: The gyro comprises a base, a gyro sensor, a power strip, a heat insulation plate, a control circuit board and an upper cover plate. The base is a single-side opening circular cake-shaped shell, and the gyro sensor is fixed in the base. The heat insulation plate, the control circuit board and the upper cover plate are sequentially arranged above the gyro sensor. The gyro sensor is electrically connected with the heat insulation plate through the power strip, and the heat insulation plate is electrically connected with the control circuit board through the plug-in mode. The upper cover plate is fixed with the base through screws to enclose other devices in the shell. The gyro sensor comprises a glass resonant cavity, a cathode and an anode arranged on the surface of the glass resonant cavity, a light signal reading device, a frequency stabilization assembly and a dither wheel arranged in the through hole in the middle of the glass resonant cavity. The surface of the glass resonant cavity is provided with an A power strip slot and a B power strip slot. The middle of the A power strip slot is provided with a center pin hole, and each of the left and right ends is provided with three pairs of pin holes.

2. The digital laser gyroscope of claim 1, wherein: The left and right ends of the B power strip slot are each provided with one edge pin hole and two pairs of pin holes.

3. The digital laser gyroscope of claim 2, wherein: The cathode is in conduction with the center pin hole of the A power strip slot through an A conductive slot.

4. The digital laser gyroscope of claim 2, wherein: The two anodes are in conduction with the edge pin holes at the two ends of the B power strip slot through two B conductive slots.

5. The digital laser gyroscope of claim 1, wherein: The wires of the light signal reading device are connected with the pin holes of the two pairs of pin holes at the two ends of the A power strip slot through pins, and the wires of the dither wheel and the frequency stabilization assembly are connected with the two pairs of pin holes of the B power strip slot through pins. The power strip is divided into an A power strip and a B power strip. The power strip comprises a power strip support and pins and flexible film cables on the upper and lower sides of the power strip support. The pins on the power strip are used to connect with the pin holes on the A slot and the B slot. The flexible film cables are used to connect with the lower surface of the heat insulation plate. Each of the two pairs of pin holes in the A power strip slot and the B power strip slot is in conduction with each other and plated with nickel-chromium gold. One pin hole in the two pairs of pin holes is connected with the pin on the power strip, and the other pin hole is connected with the lead wire of the device on the gyro sensor. The upper surface of the heat insulation plate is provided with two heat insulation plate power strips for connecting with the power strips on the control circuit board. The lower surface of the heat insulation plate is provided with a transition support integrated with the heat insulation plate power strip and connected with the flexible film cable. The heat insulation plate is provided with two pilot lights on the side close to the gyro sensor, and the pilot lights are located beside the cathode of the gyro sensor. The heat insulation plate is also provided with a temperature sensor on the side close to the gyro sensor for detecting the temperature of the gyro sensor. The A conductive slot and the B conductive slot are plated with nickel-chromium gold inside.

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