Three-axis receiving and transmitting assembly used in fiber-optic gyroscope

Abstract

The invention discloses a three-axis transceiving assembly used in a fiber-optic gyroscope, and particularly relates to the technical field of fiber-optic gyroscopes, the three-axis transceiving assembly comprises a shell, an upper extension frame is arranged at the top of the shell, and an upper mounting hole is formed in the upper extension frame in a penetrating manner. By arranging the shell, the laser, the three-path detector, the array tail fiber assembly and other structures, light source detectors are integrated together, SWaP comprehensive performance index challenges faced by medium and low precision fiber-optic gyroscopes can be effectively dealt with, on one hand, the integration of the light source detectors reduces complex connection and layout among a plurality of independent components, and on the other hand, the cost is reduced; on one hand, the internal structure of the fiber-optic gyroscope is more compact, so that the overall size and weight are obviously reduced, on the other hand, the integrated design reduces the number of connecting points and parts which may have faults, improves the stability and reliability of the product, reduces the maintenance cost and power consumption, and improves the production efficiency. And the requirements of the Internet of Things on low-cost and reliable motion sensing nodes are met.

Description

Technical Field

[0001] This invention relates to the field of fiber optic gyroscope technology, and more specifically, to a three-axis transceiver assembly for use in a fiber optic gyroscope. Background Technology

[0002] As a high-performance inertial sensing device based on the Sagnac effect, fiber optic gyroscopes occupy an important position in the field of inertial navigation and motion detection due to their all-solid-state structure, low noise characteristics, strong anti-environment interference capabilities, and wide accuracy coverage. With the urgent need for miniaturized navigation systems in inertial guided missiles, the stringent requirements of drones for lightweight and low-power sensing devices, the large demand for low-cost and reliable motion sensing nodes in the Internet of Things, and the growing demand for large-scale application of high-precision and cost-effective inertial sensors in autonomous driving technology, medium and low-precision fiber optic gyroscopes face more stringent SWaP (size, weight, power consumption, and cost) comprehensive performance challenges. Traditional fiber optic gyroscopes have relatively complex installation processes due to their dispersed components, and are prone to installation errors. At the same time, they are large in size, heavy in weight, and have complex layouts, making them prone to failure and resulting in poor stability and reliability.

[0003] Therefore, there is an urgent need for a three-axis transceiver assembly for use in fiber optic gyroscopes to solve the above problems. Summary of the Invention

[0004] To overcome the aforementioned shortcomings of existing technologies, embodiments of the present invention provide a three-axis transceiver assembly for fiber optic gyroscopes. By incorporating a housing, laser, three detectors, and an array of pigtails, the present invention integrates the light source and detectors together. This integrated innovation effectively addresses the SWaP (Survey as a Performance) challenges faced by low-to-medium precision fiber optic gyroscopes. On one hand, the integration of the light source and detectors reduces the complex connections and layouts between multiple independent components, making the internal structure of the fiber optic gyroscope more compact, thereby significantly reducing the overall size and weight. On the other hand, the integrated design reduces the number of connection points and components that may fail, improving product stability and reliability, and reducing maintenance costs and power consumption. This integrated three-axis transceiver assembly meets the IoT's demand for low-cost and reliable motion sensing nodes. In practical applications, it also offers the advantage of easy installation. Traditional fiber optic gyroscopes, due to their dispersed components, have a complex installation process and are prone to errors. The integrated design of this invention simplifies and simplifies the installation process, enabling quick and accurate installation, thus improving production efficiency and product consistency. Furthermore, the assembly offers enhanced performance, enabling more precise transmission, reception, and processing of optical signals. This provides more accurate data support for fiber optic gyroscopes in inertial navigation and motion detection, facilitating the large-scale application of high-precision inertial sensors in technologies such as autonomous driving, thereby addressing the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a three-axis transceiver assembly for use in a fiber optic gyroscope, comprising a housing, an upper extension frame disposed on the top of the housing, an upper mounting hole being provided through the upper extension frame, the upper extension frame and the housing being an integral structure, a lower extension frame disposed on the bottom of the housing, a lower mounting hole being provided through the lower extension frame, the lower extension frame and the housing being an integral structure, a TIA circuit being fixedly installed inside the housing, a laser being disposed on one side of the TIA circuit, the laser being fixedly installed inside the housing, a three-way detector being disposed at the bottom of the laser, the three-way detector being fixedly installed inside the housing, the three-way detector being disposed on the side of the TIA circuit closer to the laser, an array pigtail assembly being disposed on the side of the TIA circuit away from the laser, and a PLC optical path being disposed behind the TIA circuit.

[0006] In a preferred embodiment, the PLC optical path size is set to 410mm, and the diameter of the equivalent energy distribution of the PLC optical path fiber core is set to 6m.

[0007] In a preferred embodiment, the PLC optical path includes path one, path two, path three, path four, path five, path six, path seven, path eight, path nine, path ten, MMI A, MMI B, and three MMI Cs.

[0008] In a preferred embodiment, the spacing between passage five, passage six and passage seven is set to 250m.

[0009] In a preferred embodiment, the spacing between passage eight, passage nine and passage ten is set to 500m.

[0010] In a preferred embodiment, the distance between channel one and channel eight is set to be greater than 1200m.

[0011] In a preferred embodiment, the MMI A has a splitting ratio of 1:2, the MMI B has a splitting ratio of 1:1, and the MMI C has a splitting ratio of 1:1.

[0012] In a preferred embodiment, the link loss of Channel 1-Channel 5, Channel 1-Channel 6, and Channel 1-Channel 7 is less than 8.2 dB (TE mode), and the link loss of Channel 5-Channel 8, Channel 6-Channel 9, and Channel 7-Channel 10 is 3.4 dB.

[0013] In a preferred embodiment, the channel crosstalk channels 1-8, 1-9, and 1-10 are less than -50dB, the channel crosstalk channels 6-8, 7-8, and 7-9 are less than -40dB, and the channel crosstalk channels 3-5, 4-5, and 4-6 are less than -40dB.

[0014] The technical effects and advantages of this invention are as follows: This invention integrates the light source and detectors into a single structure, incorporating a housing, laser, three detectors, and an array of fiber optic pigtails. This integrated innovation effectively addresses the SWaP (Simultaneous Sound Performance) challenges faced by low-to-medium precision fiber optic gyroscopes. Firstly, the integration of the light source and detectors reduces the complex connections and layouts between multiple independent components, resulting in a more compact internal structure and significantly reduced overall size and weight. Secondly, the integrated design reduces the number of potential fault points and components, improving product stability and reliability, and lowering maintenance costs and power consumption. This aligns with the IoT's demand for low-cost and reliable motion sensing nodes. In practical applications, this integrated three-axis transceiver assembly also offers the advantage of easy installation. Traditional fiber optic gyroscopes, due to their dispersed components, have complex installation processes prone to errors. The integrated design of this invention simplifies and simplifies installation, enabling quick and accurate completion, improving production efficiency and product consistency. Furthermore, the assembly offers enhanced performance, enabling more precise transmission, reception, and processing of optical signals. This provides more accurate data support for fiber optic gyroscopes in inertial navigation and motion detection, facilitating the large-scale application of high-precision inertial sensors in technologies such as autonomous driving. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the TIA circuit structure of the present invention.

[0017] Figure 3 This is a schematic diagram of the second layer structure of the TIA circuit of the present invention.

[0018] Figure 4 This is a schematic diagram of the third layer structure of the TIA circuit of the present invention.

[0019] Figure 5 This is a schematic diagram of the circuit design of the present invention.

[0020] Figure 6 This is a schematic diagram of the PLC optical path structure of the present invention.

[0021] The attached diagram is labeled as follows: 1. Housing; 2. Upper extension frame; 3. Upper mounting hole; 4. Lower extension frame; 5. Lower mounting hole; 6. TIA circuit; 7. Laser; 8. Three-way detector; 9. Array pigtail assembly; 10. PLC optical path. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0023] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 and attached Figure 6 As shown, the present invention provides a three-axis transceiver assembly for use in a fiber optic gyroscope, comprising a housing 1, an upper extension frame 2 at the top of the housing 1, an upper mounting hole 3 through the upper extension frame 2, the upper extension frame 2 and the housing 1 being an integral structure, a lower extension frame 4 at the bottom of the housing 1, a lower mounting hole 5 through the lower extension frame 4, the lower extension frame 4 and the housing 1 being an integral structure, a TIA circuit 6 fixedly installed inside the housing 1, a laser 7 on one side of the TIA circuit 6, the laser 7 being fixedly installed inside the housing 1, a three-way detector 8 at the bottom of the laser 7, the three-way detector 8 being fixedly installed inside the housing 1, the three-way detector 8 being located on the side of the TIA circuit 6 near the laser 7, an array pigtail assembly 9 on the side of the TIA circuit 6 away from the laser 7, and a PLC optical path 10 on the rear side of the TIA circuit 6.

[0024] The size of the PLC optical path 10 is set to 410mm, and the diameter of the equivalent energy distribution of the fiber core of the PLC optical path 10 is set to 6m.

[0025] The PLC optical path 10 includes path 1, path 2, path 3, path 4, path 5, path 6, path 7, path 8, path 9, path 10, MMI A, MMI B and three MMI C.

[0026] The spacing between pathways five, six and seven is set to 250m.

[0027] The spacing between pathways eight, nine, and ten is set to 500m.

[0028] The distance between Channel 1 and Channel 8 is set to be greater than 1200m.

[0029] The MMI A has a splitting ratio of 1:2, the MMI B has a splitting ratio of 1:1, and the MMI C has a splitting ratio of 1:1.

[0030] The link loss of Channel 1-Channel 5, Channel 1-Channel 6, and Channel 1-Channel 7 is less than 8.2dB (TE mode), and the link loss of Channel 5-Channel 8, Channel 6-Channel 9, and Channel 7-Channel 10 is 3.4dB.

[0031] The channel crosstalk channels 1-8, 1-9, and 1-10 are less than -50dB; the channel crosstalk channels 6-8, 7-8, and 7-9 are less than -40dB; and the channel crosstalk channels 3-5, 4-5, and 4-6 are less than -40dB.

[0032] The TIA circuit 6 adopts a three-layer board structure. The signal and power lines are led out from the surface layer and connected to the housing through a wire bonding adapter. The surface layer has PD-signal lines, KP and PW control lines, Vcc5V, and GND PAD gold plating layer, which are connected to the second and third layer PAD through vias.

[0033] The second layer of the ceramic substrate has Vcc, GND PAD, and is connected to the surface layer through vias, and TIA gold wires are connected to the surface layer PAD.

[0034] The device is internally connected to the ceramic circuit inside the housing via an adapter board, and the housing and the gyroscope circuit board are connected via a flexible strip.

[0035] The specific implementation method is as follows: When using this invention, the light source detector is integrated together. Through this integrated innovation, the SWaP (Simultaneous Swing Performance) challenge faced by low-to-medium precision fiber optic gyroscopes can be effectively addressed. On the one hand, the integration of the light source detector reduces the complex connections and layout between multiple independent components, making the internal structure of the fiber optic gyroscope more compact, thereby significantly reducing the overall size and weight. On the other hand, the integrated design reduces the number of connection points and components that may fail, improving the stability and reliability of the product, reducing maintenance costs and power consumption, which meets the requirements of the Internet of Things for low-cost and reliable motion sensing nodes. In practical applications, this integrated three-axis transceiver component also has the advantage of convenient installation. Traditional fiber optic gyroscopes have relatively complex installation processes due to the dispersed components and are prone to installation errors. However, the integrated design of this invention makes the installation process simpler and more efficient, enabling quick and accurate installation, improving production efficiency and product consistency. At the same time, the component also has further improved performance, enabling more accurate transmission and processing of optical signals, providing more accurate data support for fiber optic gyroscopes in inertial navigation and motion detection, and facilitating the large-scale application of high-precision inertial sensors in autonomous driving technology and other fields.

[0036] Working principle of this invention: Refer to the instruction manual appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 and attached Figure 6 When using this invention, by incorporating a housing 1, a laser 7, a three-way detector 8, and an array of fiber optic pigtails 9, the invention integrates the light source and detectors together. This integrated innovation effectively addresses the SWaP (Software-as-Purpose) challenges faced by low-to-medium precision fiber optic gyroscopes. The integrated design addresses several performance challenges. Firstly, the integration of the light source detector reduces the complex connections and layouts between multiple independent components, making the internal structure of the fiber optic gyroscope more compact and significantly reducing its overall size and weight. Secondly, the integrated design reduces the number of connection points and components prone to failure, improving product stability and reliability, and lowering maintenance costs and power consumption. This aligns with the IoT's demand for low-cost and reliable motion sensing nodes. In practical applications, this integrated three-axis transceiver assembly also offers the advantage of easy installation. Traditional fiber optic gyroscopes, due to their dispersed components, have a complex installation process prone to errors. The integrated design of this invention simplifies and simplifies installation, enabling quick and accurate installation, improving production efficiency and product consistency. Furthermore, the component offers enhanced performance, enabling more precise transmission, reception, and processing of optical signals. This provides more accurate data support for fiber optic gyroscopes in inertial navigation and motion detection, facilitating the large-scale application of high-precision inertial sensors in technologies such as autonomous driving.

[0037] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms installation, connection, and link should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. The terms up, down, left, right, etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. This invention discloses a three-axis transceiver assembly for use in fiber optic gyroscopes, specifically relating to the field of fiber optic gyroscope technology. The assembly includes a housing, with an upper extension frame at the top of the housing and an upper mounting hole extending through the upper extension frame. By incorporating a housing, laser, three detectors, and an array of pigtails, this invention integrates the light source and detectors, effectively addressing the SWaP (Simultaneous Swing Performance) challenges faced by low-to-medium precision fiber optic gyroscopes. On one hand, the integration of the light source and detectors reduces the complex connections and layouts between multiple independent components, making the internal structure of the fiber optic gyroscope more compact, thus significantly reducing the overall size and weight. On the other hand, the integrated design reduces the number of connection points and components that may fail, improving product stability and reliability, reducing maintenance costs and power consumption, and meeting the IoT's demand for low-cost and reliable motion sensing nodes.

2. A three-axis transceiver assembly for use in a fiber optic gyroscope, comprising a housing (1), characterized in that: The top of the housing (1) is provided with an upper extension frame (2), and an upper mounting hole (3) is provided through the upper extension frame (2). The upper extension frame (2) and the housing (1) are an integral structure. The bottom of the housing (1) is provided with a lower extension frame (4), and a lower mounting hole (5) is provided through the lower extension frame (4). The lower extension frame (4) and the housing (1) are an integral structure. A TIA circuit (6) is fixedly installed inside the housing (1). A laser (7) is provided on one side of the TIA circuit (6). The laser (7) is fixedly installed inside the housing (1). A three-way detector (8) is provided at the bottom of the laser (7). The three-way detector (8) is fixedly installed inside the housing (1). The three-way detector (8) is located on the side of the TIA circuit (6) close to the laser (7). An array pigtail assembly (9) is provided on the side of the TIA circuit (6) away from the laser (7). A PLC optical path (10) is provided on the rear side of the TIA circuit (6).

3. A three-axis transceiver assembly for use in a fiber optic gyroscope according to claim 1, characterized in that: The size of the PLC optical path (10) is set to 410mm, and the diameter of the equivalent energy distribution of the fiber core of the PLC optical path (10) is set to 6m.

4. A three-axis transceiver assembly for use in a fiber optic gyroscope according to claim 1, characterized in that: The PLC optical path (10) includes path one, path two, path three, path four, path five, path six, path seven, path eight, path nine, path ten, MMI A, MMI B and three MMI C.

5. A three-axis transceiver assembly for use in a fiber optic gyroscope according to claim 3, characterized in that: The spacing between pathways five, six and seven is set to 250m.

6. A three-axis transceiver assembly for use in a fiber optic gyroscope according to claim 3, characterized in that: The spacing between pathways eight, nine, and ten is set to 500m.

7. A three-axis transceiver assembly for use in a fiber optic gyroscope according to claim 3, characterized in that: The distance between Channel 1 and Channel 8 is set to be greater than 1200m.

8. A three-axis transceiver assembly for use in a fiber optic gyroscope according to claim 3, characterized in that: The MMIA has a splitting ratio of 1:2, the MMI B has a splitting ratio of 1:1, and the MMI C has a splitting ratio of 1:

1.

9. A three-axis transceiver assembly for use in a fiber optic gyroscope according to claim 3, characterized in that: The link loss of Channel 1-Channel 5, Channel 1-Channel 6, and Channel 1-Channel 7 is less than 8.2dB (TE mode), and the link loss of Channel 5-Channel 8, Channel 6-Channel 9, and Channel 7-Channel 10 is 3.4dB.

10. A three-axis transceiver assembly for use in a fiber optic gyroscope according to claim 3, characterized in that: The channel crosstalk channels 1-8, 1-9, and 1-10 are less than -50dB; the channel crosstalk channels 6-8, 7-8, and 7-9 are less than -40dB; and the channel crosstalk channels 3-5, 4-5, and 4-6 are less than -40dB.

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