Optical path loss matching device and method for fiber-optic gyroscope

Abstract

The invention provides a fiber-optic gyroscope optical path loss matching device and method. The device comprises a light source driving and controlling module which is used for carrying out driving and temperature control on a fiber-optic gyroscope light source and comprises two resistor arrays which are connected in parallel, and the two resistor arrays are respectively provided with a resistance adjusting switch; the optical power meter is used for acquiring the actual optical power of the optical fiber gyroscope light source; the optical device parameter acquisition module is used for acquiring related parameters of each target optical device of the fiber-optic gyroscope in a two-dimensional code scanning mode; a man-machine interaction module; the resolving module is used for calculating an upper limit and a lower limit of an expected light power value of the light source according to the constraint parameters input by the man-machine interaction module and the acquired parameters of the optical device, and judging whether the actual light power is between the upper limit and the lower limit of the expected light power value of the light source; and a matching resistance adjustment prompt is given through the man-machine interaction module. On the basis of the device, the loss matching of the optical path of the fiber-optic gyroscope can be quickly and conveniently realized by combining the method.

Description

Technical Field

[0001] This invention belongs to the field of fiber optic gyroscope technology, and more specifically, relates to a fiber optic gyroscope optical path loss matching device and method. Background Technology

[0002] In the production process of fiber optic gyroscopes, the application of optical path loss matching technology has a significant effect on improving production efficiency and yield. Currently, existing optical path loss matching methods mainly rely on formula calculations based on the loss data of each optical component of the fiber optic gyroscope to obtain the desired optical power of the light source. Subsequently, the matching resistor of the light source drive control circuit is adjusted through physical soldering to determine the matching resistor value that allows the actual optical power of the light source to approach the desired optical power value. However, although the above-mentioned optical path loss matching methods can theoretically achieve good optical path loss matching results, they still have the following two problems:

[0003] First, when performing formula calculations based on the loss data of various optical devices, the loss data mainly relies on manual input, which inevitably introduces a human error rate.

[0004] Second, the adjustment of the matching resistor of the light source drive control circuit is achieved by physical welding, which is not only inefficient but also wastes material costs. Summary of the Invention

[0005] In view of this, the present invention provides a fiber optic gyroscope optical path loss matching device and method.

[0006] According to a first aspect of the present invention, a fiber optic gyroscope optical path loss matching device is provided, the device comprising a light source modulation unit and a data processing unit;

[0007] The light source modulation unit includes:

[0008] The light source control module is used to perform temperature control and constant current drive on the fiber optic gyroscope light source connected therein. The constant current drive sub-module of the light source control module includes a first resistor array and a second resistor array connected in parallel. The first resistor array and the second resistor array are respectively configured with a first matching resistor adjustment switch and a second matching resistor adjustment switch to control the resistance value of their respective inputs.

[0009] An optical power meter is connected to the fiber optic gyroscope light source via an optical fiber adapter to obtain the actual optical power P of the fiber optic gyroscope light source. i ;

[0010] The data processing unit includes:

[0011] The optical device parameter acquisition module is used to scan the QR codes of each target optical device of the fiber optic gyroscope to obtain the corresponding optical device parameters.

[0012] Human-computer interaction module;

[0013] The calculation module is used to calculate the upper limit of the expected value P of the light source optical power based on the constraint parameters input by the human-computer interaction module and the acquired optical device parameters. u And the lower limit of the expected value P of the light source power d And determine the actual optical power P i Is it at the upper limit of the expected light power P of the light source? u The lower limit of the expected value P of the light source power d If not, the human-computer interaction module will provide a prompt for adjusting the matching resistor.

[0014] Optionally, the fiber optic gyroscope optical path loss matching device also includes a power supply, a first power switch, and a second power switch.

[0015] The power supply provides power to the light source modulation unit and the data processing unit, respectively.

[0016] The first power switch is used to control the power supply to the light source modulation unit.

[0017] The second power switch is used to control the power supply to the data processing unit.

[0018] Optionally, the optical device parameters acquired by the optical device parameter acquisition module include the coupler input loss η. i Coupler output loss η o Y-waveguide loss η y Fiber ring loss η g Detector has no photovoltage V p And responsiveness R.

[0019] Optionally, the constraint parameters input by the human-computer interaction module include the upper limit of the detector's light-passing bias voltage V. u Detector light-passing bias voltage lower limit V d And optical path melting point loss η v .

[0020] Optionally, the calculation module calculates the upper limit of the expected value P of the light source power according to the following formula. u :

[0021]

[0022] In the above formula, 3 represents the Y-waveguide insertion loss, in dB.

[0023] Optionally, the calculation module calculates the lower limit P of the expected light power of the light source according to the following formula. d :

[0024]

[0025] In the above formula, 3 represents the Y-waveguide insertion loss, in dB.

[0026] Optionally, the solution module is further configured to:

[0027] Determine the actual optical power P i Whether it is 0 and the actual optical power P i With the upper limit of the expected value P of the light source power u And the lower limit of the expected value P of the light source power d Size relationship;

[0028] If the actual optical power P i If the value is 0, the human-computer interaction module will provide a prompt to check the electrical connection of the light source modulation unit.

[0029] If the actual optical power P i > Upper limit of expected light power P u The human-computer interaction module will then provide a prompt to either decrease the resistance setting of the first matching resistor adjustment switch or increase the resistance setting of the second matching resistor adjustment switch.

[0030] If the actual optical power P i < Lower limit of expected light power P of the light source d The human-computer interaction module will then provide prompts to increase the resistance level of the first matching resistor adjustment switch or decrease the resistance level of the second matching resistor adjustment switch.

[0031] If the lower limit of the expected optical power of the light source is P d ≤ Actual optical power P i ≤ Upper limit of expected light power P u If the human-computer interaction module provides a prompt that meets the requirements, then the prompt will be given.

[0032] Optionally, the data processing unit further includes an optical power data receiving module, the data input terminal of which is connected to the optical power meter, and the data output terminal of which is connected to both the processing module and the human-computer interaction module.

[0033] Optionally, the human-computer interaction module is further used for:

[0034] Displays the optical device parameters acquired by the optical device parameter acquisition module;

[0035] The upper limit of the expected optical power P of the display light source u Lower limit of expected light power P of the light source dand actual optical power P i .

[0036] According to a second aspect of the present invention, a method for matching optical path loss in a fiber optic gyroscope is provided. This method is implemented based on any of the aforementioned fiber optic gyroscope optical path loss matching devices and specifically includes the following steps:

[0037] The optical device parameter acquisition module scans the QR codes of each target optical device of the fiber optic gyroscope to obtain the corresponding optical device parameters.

[0038] Constraint parameters are set through the human-computer interaction module;

[0039] The calculation module calculates the upper limit of the expected optical power P of the light source based on the optical device parameters and the constraint parameters. u And the lower limit of the expected value P of the light source power d ;

[0040] The actual optical power P of the fiber optic gyroscope light source is obtained using the optical power meter. i ;

[0041] The actual optical power P is determined by the calculation module. i Is it at the upper limit of the expected light power P of the light source? u The lower limit of the expected value P of the light source power d If not, the human-computer interaction module provides a matching resistor adjustment prompt; if yes, the matching resistor values ​​corresponding to the first and second matching resistor adjustment switches are recorded.

[0042] The beneficial effects of this invention are as follows:

[0043] Based on the fiber optic gyroscope optical path loss matching device of the present invention, and combined with the fiber optic gyroscope optical path loss matching method of the present invention, it is possible to determine the actual optical power P of the fiber optic gyroscope light source. i At the upper limit of the expected value P of the light source power u The lower limit of the expected value P of the light source power d The matching resistor values ​​corresponding to the first and second matching resistor adjustment switches are used to determine the matching resistor value of the light source drive control circuit of the fiber optic gyroscope.

[0044] On the one hand, the fiber optic gyroscope optical path loss matching device of the present invention, by setting up an optical device parameter acquisition module, can acquire optical device parameters based on QR code scanning. This setting can not only improve the acquisition efficiency of optical device parameters, but also avoid the error rate of manual data input. On the other hand, the fiber optic gyroscope optical path loss matching device of the present invention, by introducing a resistor array mode to freely combine the adjustment resistors, can improve production efficiency while saving material costs.

[0045] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0046] The present invention can be better understood by referring to the following description taken in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to denote the same or similar parts.

[0047] Figure 1 A schematic block diagram of a fiber optic gyroscope optical path loss matching device according to an embodiment of the present invention is shown;

[0048] Figure 2 A schematic diagram of the control interface of the fiber optic gyroscope optical path loss matching device according to an embodiment of the present invention is shown.

[0049] Figure 3 A schematic diagram of the resistor array adjustment principle of the light source drive control module according to an embodiment of the present invention is shown;

[0050] Figure 4 A flowchart illustrating the implementation of a fiber optic gyroscope optical path loss matching method according to an embodiment of the present invention is shown. Detailed Implementation

[0051] To enable those skilled in the art to more fully understand the technical solutions of the present invention, exemplary embodiments of the present invention will be described more comprehensively and in detail below with reference to the accompanying drawings. Obviously, the one or more embodiments of the present invention described below are merely one or more specific ways to implement the technical solutions of the present invention, and are not exhaustive. It should be understood that other ways belonging to a general inventive concept can be used to implement the technical solutions of the present invention, and should not be limited to the embodiments described exemplary. Based on one or more 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.

[0052] Example: Figure 1 A schematic block diagram of a fiber optic gyroscope optical path loss matching device according to an embodiment of the present invention is shown. (Refer to...) Figure 1The fiber optic gyroscope optical path loss matching device of this embodiment includes a light source modulation unit 100 and a data processing unit 200.

[0053] The light source modulation unit 100 includes:

[0054] The light source control module 110 is used to perform temperature control and constant current drive on the fiber optic gyroscope light source 300 connected therein. The constant current drive sub-module of the light source control module 110 includes a first resistor array 120 and a second resistor array 130 connected in parallel. The first resistor array 120 and the second resistor array 130 are respectively equipped with a first matching resistor adjustment switch 140 and a second matching resistor adjustment switch 150 to control the resistance value of their respective inputs.

[0055] Optical power meter 160 is connected to fiber optic gyroscope light source 300 via fiber optic adapter 170 to obtain the actual optical power P of fiber optic gyroscope light source 300. i ;

[0056] The data processing unit 200 includes:

[0057] The optical device parameter acquisition module 210 is used to scan the QR codes of each target optical device of the fiber optic gyroscope to obtain the corresponding optical device parameters.

[0058] Human-computer interaction module 220;

[0059] The calculation module 230 is used to calculate the upper limit of the expected value P of the light source optical power based on the constraint parameters input by the human-computer interaction module 220 and the acquired optical device parameters. u And the lower limit of the expected value P of the light source power d And determine the actual optical power P i Is it at the upper limit of the expected light power P of the light source? u The lower limit of the expected value P of the light source power d If not, the human-computer interaction module 220 will provide a prompt for adjusting the matching resistor.

[0060] Furthermore, the fiber optic gyroscope optical path loss matching device of this embodiment of the invention also includes a power supply 410, a first power switch 420, and a second power switch 430.

[0061] The power supply 410 provides power to the light source modulation unit 100 and the data processing unit 200 respectively;

[0062] The first power switch 420 is used to control the power supply to the light source modulation unit 100.

[0063] The second power switch 430 is used to control the power supply to the data processing unit 200.

[0064] Furthermore, in this embodiment of the invention, the optical device parameters acquired by the optical device parameter acquisition module 210 include the coupler input loss η. i Coupler output loss η o Y-waveguide loss η y Fiber ring loss η g Detector has no photovoltage V p And responsiveness R.

[0065] Furthermore, in this embodiment of the invention, the constraint parameters input by the human-computer interaction module 220 include the upper limit of the detector's light-passing bias voltage V. u Detector light-passing bias voltage lower limit V d And optical path melting point loss η v .

[0066] Furthermore, in this embodiment of the invention, the calculation module 230 calculates the upper limit of the expected value P of the light source optical power according to the following formula. u :

[0067]

[0068] In the above formula, 3 represents the Y-waveguide insertion loss, in dB.

[0069] Furthermore, in this embodiment of the invention, the calculation module 230 calculates the lower limit P of the expected value of the light source optical power according to the following formula. d :

[0070]

[0071] In the above formula, 3 represents the Y-waveguide insertion loss, in dB.

[0072] Furthermore, in this embodiment of the invention, the calculation module 230 is further configured to:

[0073] Determine the actual optical power P i Whether it is 0 and the actual optical power P i With the upper limit of the expected value P of the light source power u And the lower limit of the expected value P of the light source power d Size relationship;

[0074] If the actual optical power P i If the value is 0, the human-computer interaction module 220 will provide a prompt to "check the electrical connection of the light source modulation unit".

[0075] If the actual optical power P i > Upper limit of expected light power P u If the human-computer interaction module 220 provides a prompt to "reduce the resistance level of the first matching resistor adjustment switch or increase the resistance level of the second matching resistor adjustment switch", the prompt will be given.

[0076] If the actual optical power P i < Lower limit of expected light power P of the light source d If the human-computer interaction module 220 provides a prompt to "increase the resistance level of the first matching resistor adjustment switch or decrease the resistance level of the second matching resistor adjustment switch", the prompt will be given.

[0077] If the lower limit of the expected optical power of the light source is P d ≤ Actual optical power P i ≤ Upper limit of expected light power P u If the condition is met, the human-computer interaction module 220 will provide a "requirements met" message.

[0078] Furthermore, in this embodiment of the invention, the data processing unit 200 further includes an optical power data receiving module 240. The data input terminal of the optical power data receiving module 240 is connected to the optical power meter 160, and the data output terminal of the optical power data receiving module 240 is connected to both the processing module 230 and the human-computer interaction module 220.

[0079] Furthermore, in this embodiment of the invention, the human-computer interaction module 220 is further used for:

[0080] The optical device parameters acquired by the display optical device parameter acquisition module 210;

[0081] The upper limit of the expected optical power P of the display light source u Lower limit of expected light power P of the light source d and actual optical power P i .

[0082] Specifically, Figure 2 A schematic diagram of the control interface of the fiber optic gyroscope optical path loss matching device according to an embodiment of the present invention is shown. Figure 3 A schematic diagram illustrating the resistor array adjustment principle of the light source drive control module according to an embodiment of the present invention is shown. The following is in conjunction with... Figures 1 to 3 A more detailed description of the fiber optic gyroscope optical path loss matching device according to an embodiment of the present invention is provided below:

[0083] The fiber optic gyroscope optical path loss matching device of this invention mainly includes a light source modulation unit 100, a data processing unit 200, a power supply 410, and a first power switch 420 and a second power switch 430 implemented by push-button switches.

[0084] The power supply 410 is connected to the first power switch 420 and the second power switch 430. The first power switch 420 and the second power switch 430 control the power supply to the light source modulation unit 100 and the data processing unit 200, respectively.

[0085] The data processing unit 200 includes an optical device parameter acquisition module 210, a human-computer interaction module 220, a processing module 230, and an optical power data receiving module 240. The optical device parameter acquisition module 210 is electrically connected to the processing module 230. By recognizing the optical device's QR code, it provides the processing module 230 with information on various parameters of the optical device, including the coupler input loss η. i Coupler output loss η o Y-waveguide loss η y Fiber ring loss η g Detector has no photovoltage V p And the responsivity R. The human-machine interaction module 220 is also connected to the calculation module 230, the optical device parameter acquisition module 210, and the optical power data receiving module 240. Constraints are set through the human-machine interaction module 220, including the upper limit of the detector light-passing bias voltage V. u Lower limit V d And optical path melting point loss η v The data is transmitted to the calculation module 230 for calculation, which yields the upper limit of the expected optical power P of the light source. u And the lower limit of the expected value P of the light source power d The upper limit of the expected light power P of the light source is displayed through the human-computer interaction module 220. u And the lower limit of the expected value P of the light source power d .

[0086] The light source modulation unit 100 includes a light source control module 110, a first matching resistor adjustment switch 140 and a second matching resistor adjustment switch 150 implemented using a rotary switch, an optical power meter 160, and an optical fiber adapter 170. The light source modulation unit 100 includes a temperature control circuit and a constant current circuit. The two matching resistors in the constant current circuit are composed of a first resistor array 120 and a second resistor array 130. The resistance values ​​of the first resistor array 120 and the second resistor array 130 connected to the circuit can be controlled by the first matching resistor adjustment switch 140 and the second matching resistor adjustment switch 150, respectively. The light source control module 110 is connected to the fiber optic gyroscope light source 300 through a light source electrical interface on the main panel of the device, providing constant current drive to the fiber optic gyroscope light source 300. The fiber optic gyroscope light source 300 is connected to the optical fiber adapter 170 through an optical fiber adapter interface on the main panel of the device, thereby achieving optical path connection with the optical power meter 160.

[0087] The optical power meter 160 in the light source modulation unit 100 is connected to the optical power data receiving module 240 in the data processing unit 200. The optical power data receiving module 240 transmits the actual optical power P of the fiber optic gyroscope light source sent by the optical power meter 160. i The data is transmitted in real time to the calculation module 230, which then calculates the actual optical power P. i With the upper limit of the expected value P of the light source poweru And the lower limit of the expected value P of the light source power d A comparison is performed, and based on the comparison results, corresponding operation prompts are issued on the human-computer interaction module 220. If P i If P is 0, the prompt will be "Check the electrical connection of the light source modulation circuit". i >P u Then an alarm message will be issued: "Reduce the resistance setting of the first matching resistor adjustment switch or increase the resistance setting of the second matching resistor adjustment switch." If P i <P d If the requirements are met, an alarm message will be displayed: "Increase the resistance setting of the first matching resistor adjustment switch or decrease the resistance setting of the second matching resistor adjustment switch." If the requirements are met, "Requirements met" will be displayed.

[0088] Reference Figure 2 The device QR code recognition window of the optical device parameter acquisition module 210, the power supply interface for connecting to the power supply 410, the human-machine interaction module 220, the first matching resistor adjustment switch 140, the second matching resistor adjustment switch 150, the first power switch 420 and the second power switch 430 are all set on the main panel of the device.

[0089] The specific operation procedure of the fiber optic gyroscope optical path loss matching device according to this embodiment of the invention is as follows:

[0090] 1) Connect to power supply 410;

[0091] 2) Turn on the second power switch 430;

[0092] 3) Scan the QR code of the optical device, extract the data, and display it to the human-machine interaction module 220 to proceed with the next optical device scan and data confirmation. Data confirmation includes: the coupler input loss is η. i and output loss η o Y-waveguide loss η y Fiber ring loss η g The detector has no photovoltage V p Enter the responsivity R until all optical device data is entered, then click OK;

[0093] 4) Set the upper limit of the detector's light-passing bias voltage V u The detector passes through the lower limit of the optical bias voltage V. d And optical path melting point loss η v ;

[0094] 5) Click Calculate, upper limit of expected light power P of the light source u And the lower limit of the expected value P of the light source power d ;

[0095] 6) Connect the fiber optic gyroscope light source 300 via the light source electrical interface;

[0096] 7) Turn on the first power switch 420;

[0097] 8) The fiber optic gyroscope light source 300 is connected to the optical power meter 160 via the fiber optic adapter 170 to display the actual optical power P. i ;

[0098] 9) Solving module 230 calculates the actual optical power P. i With the upper limit of the expected value P of the light source power u And the lower limit of the expected value P of the light source power d Compare the data and follow the on-screen prompts to perform subsequent operations until "Requirements met" is displayed;

[0099] 10) Record the resistance values ​​of the matching resistors corresponding to the first matching resistor adjustment switch 140 and the second matching resistor adjustment switch 150;

[0100] 11) Turn off the first power switch 420 and the second power switch 430.

[0101] In step 3), the coupler input loss η i To obtain an average value, since fiber optic gyroscopes use either 2×2 or 1×2 couplers, and the 2×2 coupler has two sets of losses with similar values, only one output is needed when connected to the fiber optic gyroscope optical path system. Therefore, only one set of loss values ​​is involved. Since it's impossible to determine which output is actually connected to the fiber optic gyroscope, the average of the two input losses is taken. Similarly, the coupler output loss η... o This is also to take the average value.

[0102] In step 4), the optical path melting point loss η v This represents the total loss of light emitted from the light source through all fusion points during transmission in the entire optical path system. The loss at each fusion point is related to the optical fiber splicing mode. If it is a 0° fusion point for single-mode fiber, the default loss is 0.03. If it is a 45° fusion point for polarization-maintaining fiber, the default loss is 0.3.

[0103] In step 8), if P i If the value is 0, the message "Check the electrical connection of the light source modulation circuit" will appear.

[0104] The principle of the optical path adjustment resistor is as follows: Figure 3 As shown, resistors are freely combined in the form of an array, with the constant current driving value I of the light source and the first resistor array R... 1n Second resistor array R 2m The relationship is as follows:

[0105]

[0106] In the above formula, 'a' is a constant term.

[0107] As can be seen from the above formula, n×m ranges can be selected by combining n types of R1 resistors and m types of R2 resistors.

[0108] Accordingly, based on the fiber optic gyroscope optical path loss matching device of the present invention, the present invention also proposes a fiber optic gyroscope optical path loss matching method based on the above-mentioned fiber optic gyroscope optical path loss matching device.

[0109] Figure 4 A flowchart illustrating the implementation of the fiber optic gyroscope optical path loss matching method according to an embodiment of the present invention is shown. (Refer to...) Figure 4 The fiber optic gyroscope optical path loss matching method of this invention includes the following steps:

[0110] Step S100: Scan the QR codes of each target optical device of the fiber optic gyroscope through the optical device parameter acquisition module to obtain the corresponding optical device parameters.

[0111] Step S200: Set constraint parameters through the human-computer interaction module;

[0112] Step S300: The calculation module calculates the upper limit of the expected optical power P of the light source based on the optical device parameters and constraint parameters. u And the lower limit of the expected value P of the light source power d ;

[0113] Step S400: Obtain the actual optical power P of the fiber optic gyroscope source using an optical power meter. i ;

[0114] Step S500: Determine the actual optical power P through the calculation module. i Is it at the upper limit of the expected light power P of the light source? u The lower limit of the expected value P of the light source power d If not, provide a matching resistor adjustment prompt through the human-computer interaction module; if yes, record the matching resistor values ​​corresponding to the first and second matching resistor adjustment switches.

[0115] The fiber optic gyroscope optical path loss matching method of this invention extracts the parameters of each optical device through QR code recognition technology, transmits the input constraint parameters to the calculation module for data calculation, and obtains the upper limit of the expected value P of the light source optical power. u And the lower limit of the expected value P of the light source power d Subsequently, the actual optical power of the light source is adjusted by adjusting the first matching resistor adjustment switch and the second matching resistor adjustment switch to meet the upper and lower limit requirements. At this time, the matching resistor value required by the light source drive circuit of the fiber optic gyroscope can be determined according to the matching resistor values ​​corresponding to the first matching resistor adjustment switch and the second matching resistor adjustment switch.

[0116] While one or more embodiments of the present invention have been described above, those skilled in the art will recognize that the present invention can be implemented in any other form without departing from its spirit and scope. Therefore, the embodiments described above are illustrative and not restrictive, and many modifications and substitutions will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A fiber optic gyroscope optical path loss matching device, characterized in that, Includes a light source modulation unit and a data processing unit; The light source modulation unit includes: The light source control module is used to perform temperature control and constant current drive on the fiber optic gyroscope light source connected therein. The constant current drive sub-module of the light source control module includes a first resistor array and a second resistor array connected in parallel. The first resistor array and the second resistor array are respectively configured with a first matching resistor adjustment switch and a second matching resistor adjustment switch to control the resistance value of their respective inputs. An optical power meter is connected to the fiber optic gyroscope light source via an optical fiber adapter to obtain the actual optical power P of the fiber optic gyroscope light source. i ; The data processing unit includes: The optical device parameter acquisition module is used to scan the QR codes of each target optical device of the fiber optic gyroscope to obtain the corresponding optical device parameters. Human-computer interaction module; The calculation module is used to calculate the upper limit of the expected value P of the light source optical power based on the constraint parameters input by the human-computer interaction module and the acquired optical device parameters. u And the lower limit of the expected value P of the light source power d And determine the actual optical power P i Is it at the upper limit of the expected light power P of the light source? u The lower limit of the expected value P of the light source power d If not, the human-computer interaction module will provide a prompt for adjusting the matching resistor.

2. The fiber optic gyroscope optical path loss matching device according to claim 1, characterized in that, It also includes a power supply, a first power switch, and a second power switch; The power supply provides power to the light source modulation unit and the data processing unit, respectively. The first power switch is used to control the power supply to the light source modulation unit. The second power switch is used to control the power supply to the data processing unit.

3. The fiber optic gyroscope optical path loss matching device according to claim 1, characterized in that, The optical device parameters acquired by the optical device parameter acquisition module include the coupler input loss η. i Coupler output loss η o Y-waveguide loss η y Fiber ring loss η g Detector has no photovoltage V p And responsiveness R.

4. The fiber optic gyroscope optical path loss matching device according to claim 3, characterized in that, The constraint parameters input to the human-computer interaction module include the upper limit of the detector's light-passing bias voltage V. u Detector light-passing bias voltage lower limit V d And optical path melting point loss η v .

5. The fiber optic gyroscope optical path loss matching device according to claim 4, characterized in that, The calculation module calculates the upper limit of the expected light power P of the light source according to the following formula. u : In the above formula, 3 represents the Y-waveguide insertion loss, in dB.

6. The fiber optic gyroscope optical path loss matching device according to claim 5, characterized in that, The calculation module calculates the lower limit of the expected light power P of the light source according to the following formula. d : In the above formula, 3 represents the Y-waveguide insertion loss, in dB.

7. The fiber optic gyroscope optical path loss matching device according to claim 1, characterized in that, The solution module is further used for: Determine the actual optical power P i Whether it is 0 and the actual optical power P i With the upper limit of the expected value P of the light source power u And the lower limit of the expected value P of the light source power d Size relationship; If the actual optical power P i If the value is 0, the human-computer interaction module will provide a prompt to check the electrical connection of the light source modulation unit. If the actual optical power P i > Upper limit of expected light power P u The human-computer interaction module will then provide a prompt to either decrease the resistance setting of the first matching resistor adjustment switch or increase the resistance setting of the second matching resistor adjustment switch. If the actual optical power P i < Lower limit of expected light power P of the light source d The human-computer interaction module will then provide prompts to increase the resistance level of the first matching resistor adjustment switch or decrease the resistance level of the second matching resistor adjustment switch. If the lower limit of the expected optical power of the light source is P d ≤ Actual optical power P i ≤ Upper limit of expected light power P u If the human-computer interaction module provides a prompt that meets the requirements, then the prompt will be given.

8. The fiber optic gyroscope optical path loss matching device according to claim 1, characterized in that, The data processing unit further includes an optical power data receiving module. The data input terminal of the optical power data receiving module is connected to the optical power meter, and the data output terminal of the optical power data receiving module is connected to both the processing module and the human-computer interaction module.

9. The fiber optic gyroscope optical path loss matching device according to claim 8, characterized in that, The human-computer interaction module is further used for: Displays the optical device parameters acquired by the optical device parameter acquisition module; The upper limit of the expected optical power P of the display light source u Lower limit of expected light power P of the light source d and actual optical power P i .

10. A method for matching optical path loss in a fiber optic gyroscope, characterized in that, It is implemented based on the fiber optic gyroscope optical path loss matching device according to any one of claims 1-9; The fiber optic gyroscope optical path loss matching method includes: The optical device parameter acquisition module scans the QR codes of each target optical device of the fiber optic gyroscope to obtain the corresponding optical device parameters. Constraint parameters are set through the human-computer interaction module; The calculation module calculates the upper limit of the expected optical power P of the light source based on the optical device parameters and the constraint parameters. u And the lower limit of the expected value P of the light source power d ; The actual optical power P of the fiber optic gyroscope light source is obtained using the optical power meter. i ; The actual optical power P is determined by the calculation module. i Is it at the upper limit of the expected light power P of the light source? u The lower limit of the expected value P of the light source power d If not, the human-computer interaction module provides a matching resistor adjustment prompt; if yes, the matching resistor values ​​corresponding to the first and second matching resistor adjustment switches are recorded.

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