High-precision gyroscope multi-mode matching photoelectric integrated system

Abstract

The invention relates to a multi-mode matching photoelectric integrated system for a high-precision gyroscope, which is mainly used for solving the technical problems that heat generated by heating devices in an existing optical fiber gyroscope is dispersed at two ends of an optical fiber ring module, the measurement precision of the optical fiber ring module is greatly influenced, the occupied space is large, and the miniaturization requirement cannot be met. The invention relates to a high-precision gyroscope multi-mode matching photoelectric integrated system which comprises an outer shell, and a light source, a coupler, at least one photoelectric component, a digital demodulation circuit board and a connector which are arranged on the outer shell. The light source is connected with the coupler, and the digital demodulation circuit board is connected with the photoelectric assembly, modulates and demodulates collected electric signals, outputs angular rate values and transmits the angular rate values to external equipment through a connector. According to the invention, the heating device is integrally designed in the outer shell, so that the space ratio is reduced, the heating device can be placed away from the optical fiber ring module, and a good heat insulation effect is achieved.

Description

Technical Field

[0001] The invention relates to an optoelectronic integrated system, in particular to a high-precision gyroscope multi-mode matching optoelectronic integrated system. Background Art

[0002] The light source, circuit board, optoelectronic components and other components in the fiber optic gyroscope are heat-generating components that generate heat during operation. The fiber optic ring module is a heat-sensitive component, and temperature changes will cause changes in the optical properties of the fiber optic ring module, which in turn will reduce the measurement accuracy of the fiber optic gyroscope.

[0003] The light source and coupler in the prior art are usually placed at one end of the fiber ring module to emit light and transmit it to the fiber ring module, while the optoelectronic components and digital demodulation circuit board are connected to the other end of the fiber ring module to perform optoelectronic conversion, modulation, demodulation and other processing on the optical signal output by the fiber ring module, so as to obtain the rotation information of the fiber ring module. However, the above-mentioned heating devices are scattered around the fiber ring module, and the heat generated by them has a great influence on the measurement accuracy of the fiber ring module, and they occupy a large space, which does not meet the miniaturization requirements. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems that the heat generating devices in the existing fiber optic gyroscope are dispersedly arranged at both ends of the fiber optic ring module, the heat generated by the heat generating devices has a great influence on the measurement accuracy of the fiber optic ring module, and the heat occupies a large space and does not meet the miniaturization requirements. A high-precision gyroscope multi-mode matching optoelectronic integrated system is proposed.

[0005] To solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0006] A high-precision gyro multi-mode matching optoelectronic integrated system, which is special in that it includes an outer shell, a light source, a coupler, at least one optoelectronic component, a digital demodulation circuit board and a connector;

[0007] The light source is installed at the bottom of the outer shell, and its output end is connected to the input end of the coupler;

[0008] The coupler is installed above the light source, and the multiple output ends of the coupler are respectively used to connect with the input end of the external optical fiber ring module through optical fibers to transmit the optical signal to the optical fiber ring module;

[0009] Each of the optoelectronic components is used to convert the optical signal output by the optical fiber ring module into an electrical signal through the optical fiber and the output end of the optical fiber ring module; the optoelectronic component is located inside the outer shell and plugged under the digital demodulation circuit board to transmit the electrical signal to the digital demodulation circuit board;

[0010] The digital demodulation circuit board is fixedly connected to the lower part of the upper end cover of the outer shell, and is used to modulate and demodulate the collected electrical signal and output the angular velocity value of the external optical fiber ring module;

[0011] The connector is arranged on a side surface of the outer shell, one end of which is connected to the digital demodulation circuit board, and the other end is used to connect to an external device to transmit the angular velocity value to the external device.

[0012] Furthermore, the digital demodulation circuit board is also used to connect to the optical fiber ring module through a wire to perform phase modulation on the light passing through the inside of the optical fiber ring module.

[0013] Furthermore, it also includes a wire outlet and a plurality of fiber outlets arranged on the outer shell, and located on the same side as the connector;

[0014] The wire outlet is used for passing the wire through; the fiber outlet is used for passing the optical fiber through.

[0015] Furthermore, the light source is an ASE light source.

[0016] Furthermore, the number of the optoelectronic components is two;

[0017] The coupler is a 1×2 coupler, and the two output ends of the 1×2 coupler are used to connect to the input end of the optical fiber ring module through optical fibers respectively, so as to divide the optical signal into two paths and transmit them to the optical fiber ring modules on the dual axes respectively.

[0018] Furthermore, the number of the optoelectronic components is three;

[0019] The coupler is a 1×3 coupler, and the three output ends of the 1×3 coupler are used to connect to the input end of the optical fiber ring module through optical fibers respectively, so as to divide the optical signal into three paths and transmit them to the optical fiber ring modules on three axes respectively.

[0020] Furthermore, the number of the optoelectronic components is four;

[0021] The coupler is a 1×3 coupler and a 1×2 coupler;

[0022] One output end of the 1×3 coupler is connected to the input end of the 1×2 coupler, and the other two output ends of the 1×3 coupler and the two output ends of the 1×2 coupler are used to connect to the input end of the optical fiber ring module through optical fibers, respectively, to divide the optical signal into four paths and transmit them to the optical fiber ring modules on the four axes respectively.

[0023] Furthermore, the number of the optoelectronic components is four;

[0024] The coupler is a 1×4 coupler, and the four output ends of the 1×4 coupler are used to connect to the input ends of the optical fiber ring module through optical fibers respectively, so as to divide the optical signal into four paths and transmit them to the optical fiber ring modules on the four axes respectively.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The high-precision gyroscope multi-mode matching optoelectronic integrated system of the present invention includes an outer shell, and a light source, a coupler, at least one optoelectronic component, a digital demodulation circuit board and a connector installed on the outer shell. The light source is connected to the coupler, and the coupler divides the optical signal emitted by the light source into multiple paths and transmits them to the external fiber optic ring module. The optoelectronic component is used to receive the signal output by the fiber optic ring module and convert it into an electrical signal. The digital demodulation circuit board is connected to the optoelectronic component, modulates and demodulates the collected electrical signal, outputs the angular velocity value, and transmits it to the external device through the connector. The present invention integrates the heating device into the outer shell, which not only reduces the space occupied, but also can be placed away from the fiber optic ring module, and has a good heat insulation effect.

[0027] 2. The high-precision gyro multi-mode matching optoelectronic integrated system of the present invention can flexibly adapt to dual-axis, tri-axis, quad-axis and other multi-axis gyroscopes by adopting different types of couplers, and has good adaptability.

[0028] 3. The high-precision gyro multi-mode matching optoelectronic integrated system of the present invention can perform multi-mode matching with the fiber ring module. For example, the two fiber ring modules in the dual-axis gyroscope can be of the same or different models, so as to form gyro axial outputs with multiple precision requirements in the same fiber optic gyroscope system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an embodiment of a high-precision gyroscope multi-mode matching optoelectronic integrated system of the present invention;

[0030] Figure 2 A top view of an embodiment of a high-precision gyro multi-mode matching optoelectronic integrated system of the present invention;

[0031] Figure 3 for Figure 2 AA section view;

[0032] Figure 4 This is a structural schematic diagram of Embodiment 1 of the high-precision gyro multi-mode matching optoelectronic integrated system of the present invention (digital demodulation circuit board omitted);

[0033] Figure 5 A top view of a first embodiment of a high-precision gyro multi-mode matching optoelectronic integrated system of the present invention (the digital demodulation circuit board is omitted);

[0034] Figure 6 It is a structural schematic diagram of the connection between the first embodiment of the high-precision gyro multi-mode matching optoelectronic integrated system of the present invention and the optical fiber ring module of the three-axis optical fiber gyroscope;

[0035] Figure 7 It is a structural schematic diagram of the connection between the second embodiment of the high-precision gyro multi-mode matching optoelectronic integrated system of the present invention and the optical fiber ring module of the dual-axis fiber optic gyroscope;

[0036] Figure 8 It is a structural schematic diagram of the connection between the third embodiment of the high-precision gyro multi-mode matching optoelectronic integrated system of the present invention and the optical fiber ring module of the four-axis fiber optic gyroscope.

[0037] Description of reference numerals:

[0038] 1. Outer shell; 2. Light source; 3. Coupler; 4. Optoelectronic components; 5. Digital demodulation circuit board; 6. Cable outlet; 7. Fiber outlet; 8. Connector; 9. Fiber ring module. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] Embodiment 1

[0041] The present invention provides a high-precision gyro multi-mode matching optoelectronic integrated system, such as Figure 1 , Figure 2 , Figure 3 As shown, it includes an outer shell 1, a light source 2, a coupler 3, three optoelectronic components 4, a digital demodulation circuit board 5, a line outlet 6, a plurality of fiber outlets 7 and a connector 8.

[0042] The light source 2 is an ASE light source, namely, an amplified spontaneous emission light source, and is embedded in the bottom of the outer shell 1 , with its output end connected to the input end of the coupler 3 .

[0043] like Figure 4 , Figure 5 As shown, coupler 3 is a 1×3 coupler installed above the ASE light source. Figure 6 As shown, it can be used for a three-axis fiber optic gyroscope. The three output ends of the 1×3 coupler are connected to the input ends of an external three-axis fiber optic ring module 9 through optical fibers, respectively, and the optical signal is divided into three paths according to the coupling ratio and transmitted to the fiber optic ring module 9 respectively.

[0044] like Figure 3 , Figure 4 As shown, three optoelectronic components 4 are located inside the outer shell 1 and plugged into the digital demodulation circuit board 5. The three optoelectronic components 4 are respectively used to connect to the output end of the optical fiber ring module 9 on the three axes through optical fibers to convert the optical signal output by the optical fiber ring module 9 into an electrical signal.

[0045] The digital demodulation circuit board 5 is installed inside the outer shell 1 and fixedly connected to the upper end cover of the outer shell 1. The digital demodulation circuit is connected to the optoelectronic component 4, and is used for signal modulation and demodulation, extracting the phase difference information including angular velocity and angular displacement from the electrical signal, and outputting the angular velocity value of the external optical fiber ring module 9. The digital demodulation circuit board 5 is also connected to the Y waveguide in the optical fiber ring module 9 through a wire, and is used to phase modulate the light inside the optical fiber ring module 9.

[0046] The wire outlet 6, the fiber outlet 7 and the connector 8 are all arranged on the same side of the outer shell 1. The wire outlet 6 is used to pass the wire. There are two fiber outlets 7 for passing the optical fiber. One end of the connector 8 is connected to the digital demodulation circuit board 5, and the other end is used to connect to the external device to transmit the angular velocity value to the external device.

[0047] The optical fiber ring modules 9 on the three axes can all be 70-type (70 mm in diameter), 90-type or 120-type optical fiber ring modules. According to different precision requirements, there are 10 combination modes, and the high-precision gyro multi-mode matching optoelectronic integrated system of the present invention can be adapted.

[0048] Embodiment 2

[0049] The difference between this embodiment and the first embodiment is that this embodiment uses a 1×2 coupler, which can be used for a dual-axis fiber optic gyroscope. Figure 7 As shown, the two output ends of the 1×2 coupler are connected to the input ends of the external dual-axis optical fiber ring module 9 through optical fibers, and the optical signal is divided into two paths according to the coupling ratio and transmitted to the optical fiber ring module 9 respectively.

[0050] As shown in Table 1, this is the combination form of the high-precision gyro multi-mode matching optoelectronic integrated system of this embodiment applied to the dual-axis fiber optic gyroscope.

[0051] Table 1 Combination of dual-axis fiber optic gyroscopes

[0052]

[0053] The optical fiber ring module on the X-axis can be a 70-type (70 mm in diameter), 90-type or 120-type optical fiber ring module, and the optical fiber ring module on the Y-axis can also be a 70-type (70 mm in diameter), 90-type or 120-type optical fiber ring module. According to different precision requirements, there are 6 combination modes, and the high-precision gyro multi-mode matching optoelectronic integrated system of the present invention can be adapted.

[0054] Embodiment 3

[0055] The difference between this embodiment and the first embodiment is that this embodiment uses a 1×4 coupler, which can be used for a four-axis fiber optic gyroscope. Figure 8As shown, the four output ends of the 1×4 coupler are connected to the input ends of the external four-axis optical fiber ring module 9 through optical fibers, and the optical signal is divided into four paths according to the coupling ratio and transmitted to the optical fiber ring module 9 respectively.

[0056] Or a 1×3 coupler and a 1×2 coupler are used, one output end of the 1×3 coupler is connected to the input end of the 1×2 coupler, and the other two output ends of the 1×3 coupler and the two output ends of the 1×2 coupler are respectively connected to the input end of the optical fiber ring module 9 through optical fibers, and the optical signal is divided into four paths according to the coupling ratio and transmitted to the optical fiber ring module 9 respectively.

[0057] Or a 1×3 coupler and a 2×2 coupler are used, one output end of the 1×3 coupler is connected to one input end of the 2×2 coupler, and a section of optical fiber is led out from the other input end of the 2×2 coupler and wound into an optical fiber loop with a diameter less than 1 cm, which is used to eliminate optical path deviation. The other two output ends of the 1×3 coupler and the two output ends of the 2×2 coupler are respectively connected to the input end of the optical fiber ring module 9 through optical fibers.

[0058] One fiber ring module 9 in the four-axis fiber optic gyroscope is used as a backup, and the other three are arranged on the X, Y, and Z axes respectively.

[0059] The optical fiber ring modules 9 on the four axes can all be 70-type (70 mm in diameter), 90-type or 120-type optical fiber ring modules. According to different precision requirements, there are 12 combination modes, and the high-precision gyro multi-mode matching optoelectronic integrated system of the present invention can be adapted.

Claims

1. A high-precision gyro multi-mode matching optoelectronic integrated system, characterized in that: It comprises an outer shell (1), a light source (2), a coupler (3), at least one optoelectronic component (4), a digital demodulation circuit board (5) and a connector (8); The light source (2) is installed at the bottom of the outer shell (1), and its output end is connected to the input end of the coupler (3); The coupler (3) is installed above the light source (2), and a plurality of output ends of the coupler (3) are respectively used to connect to input ends of an external optical fiber ring module (9) through optical fibers, so as to transmit optical signals to the optical fiber ring module (9); Each of the optoelectronic components (4) is used to convert the optical signal output by the optical fiber ring module (9) into an electrical signal through the optical fiber and the output end of the optical fiber ring module (9); the optoelectronic component (4) is located inside the outer shell (1) and plugged under the digital demodulation circuit board (5) to transmit the electrical signal to the digital demodulation circuit board (5); The digital demodulation circuit board (5) is fixedly connected to the lower side of the upper end cover of the outer shell (1), and is used to modulate and demodulate the collected electrical signal and output the angular velocity value of the external optical fiber ring module (9); The connector (8) is arranged on a side surface of the outer shell (1), one end of which is connected to the digital demodulation circuit board (5), and the other end of which is used to connect to an external device to transmit the angular velocity value to the external device.

2. The high-precision gyro multi-mode matching optoelectronic integrated system according to claim 1, characterized in that: The digital demodulation circuit board (5) is also used to be connected to the optical fiber ring module (9) via a wire, so as to perform phase modulation on the light passing through the inside of the optical fiber ring module (9).

3. The high-precision gyro multi-mode matching optoelectronic integrated system according to claim 2, characterized in that: It also includes a wire outlet (6) and a plurality of fiber outlets (7) arranged on the outer shell (1), and located on the same side as the connector (8); The wire outlet (6) is used for passing a wire through; and the fiber outlet (7) is used for passing an optical fiber through.

4. The high-precision gyro multi-mode matching optoelectronic integrated system according to claim 3, characterized in that: The light source (2) is an ASE light source.

5. The high-precision gyro multi-mode matching optoelectronic integrated system according to any one of claims 1 to 4, characterized in that: The number of the optoelectronic components (4) is two; The coupler (3) is a 1×2 coupler, and the two output ends of the 1×2 coupler are used to connect to the input end of the optical fiber ring module (9) through optical fibers, respectively, to split the optical signal into two paths and transmit them to the optical fiber ring modules (9) on the dual axes respectively.

6. The high-precision gyro multi-mode matching optoelectronic integrated system according to any one of claims 1 to 4, characterized in that: The number of the optoelectronic components (4) is three; The coupler (3) is a 1×3 coupler, and the three output ends of the 1×3 coupler are used to connect to the input ends of the optical fiber ring module (9) through optical fibers, respectively, to divide the optical signal into three paths and transmit them to the optical fiber ring modules (9) on three axes respectively.

7. The high-precision gyro multi-mode matching optoelectronic integrated system according to any one of claims 1 to 4, characterized in that: The number of the optoelectronic components (4) is four; The coupler (3) is a 1×3 coupler and a 1×2 coupler; One output end of the 1×3 coupler is connected to the input end of the 1×2 coupler, and the other two output ends of the 1×3 coupler and the two output ends of the 1×2 coupler are used to be connected to the input end of the optical fiber ring module (9) through optical fibers, respectively, to divide the optical signal into four paths and transmit them to the optical fiber ring modules (9) on the four axes respectively.

8. The high-precision gyro multi-mode matching optoelectronic integrated system according to any one of claims 1 to 4, characterized in that: The number of the optoelectronic components (4) is four; The coupler (3) is a 1×4 coupler, and the four output ends of the 1×4 coupler are used to connect to the input ends of the optical fiber ring module (9) through optical fibers, respectively, to divide the optical signal into four paths and transmit them to the optical fiber ring modules (9) on the four axes respectively.

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