Device and method for diagnosing working state and zero position of double-selsyn system

Abstract

The invention discloses a double selsyn system working state and zero position diagnosis device and method, and belongs to the field of electromechanical equipment detection and fault diagnosis. The device comprises a detection box and a cable, the detection box is formed by fixedly connecting a bottom plate combination, an upper cover plate combination, a converter plate combination, a front cover plate, a rear cover plate, a left side plate and a right side plate, and all the plate bodies jointly define a containing space. The bottom plate combination comprises a medium-frequency power supply module and a direct-current power supply module; the upper cover plate combination comprises a display module; the converter board combination is positioned in the accommodating space and comprises a converter; the rear cover plate is provided with a first socket connected with an external power supply and a second socket connected with a cable so as to be connected with the selsyn. The system can operate independently of a main system, is directly connected with the double selsyn through the connecting cable, can display decimal angle values in real time, ensures signal transmission quality through near-end connection, and realizes dynamic diagnosis of the working state of the double selsyn system and accurate calibration of zero consistency.

Description

Technical Field

[0001] This invention belongs to the field of electromechanical equipment testing and fault diagnosis technology, specifically relating to a portable testing device and method for a dual synchro system, and particularly a device and method capable of dynamically diagnosing the working status of a dual synchro system and accurately calibrating the zero-position consistency. Background Technology

[0002] In industrial control and position sensing systems, a dual synchro system, consisting of a fine synchro and a coarse synchro, is often used to obtain high-precision angular position information. To ensure system accuracy, it is necessary not only to ensure the normal functioning of each individual synchro, but also to ensure the continuity and correctness of the output signals when the fine and coarse channels work together (i.e., normal operating status), and that the electrical zero point of the synchro is strictly aligned with the mechanical zero point of the mechanical system (i.e., zero point consistency).

[0003] Currently, the testing of dual synchro systems largely relies on the system's existing ruggedized computer and display unit. Operators typically need to use connectors to extract the digital signals processed by the computer and indirectly judge the signal status by observing the on / off status of indicator lights such as LEDs. For example, during zero-position calibration, the synchro rotor needs to be adjusted until all corresponding indicator lights are off.

[0004] However, this detection method, which relies on the main system, has obvious limitations: First, it cannot be performed independently without power on the system, and the detection activity is subject to the status of the main equipment; second, the on / off state of the LEDs can only provide a rough indication of "present / absent" signal, and cannot intuitively and quantitatively display the angle value, making it difficult to diagnose the dynamic performance of the system throughout the entire range (such as whether there are jumps); finally, since the synchro is usually installed at the equipment site, while the computer cabinet is often far away, the long cable leads are not only inconvenient to operate, but also prone to introducing signal interference, affecting the accuracy and reliability of the diagnosis. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of existing dual synchro systems, which require the main system to be powered on for testing, cannot independently perform working status diagnosis, and have a cumbersome and inaccurate zero-position calibration process. The invention proposes a comprehensive testing device and method for dual synchro systems that can operate independently and has both dynamic performance diagnosis and high-precision zero-position calibration functions.

[0006] To achieve the above objectives, the technical solution provided by this invention is:

[0007] On the one hand, a device for diagnosing the working status and zero position of a dual self-synchro system is provided, including a detection box and a connecting cable;

[0008] The test box includes a base plate assembly, a top cover plate assembly, a converter plate assembly, a front cover plate, a rear cover plate assembly, a left side plate, and a right side plate, all of which are fastened together by fasteners. The plates together form an accommodating space.

[0009] The base plate assembly includes a base plate, an intermediate frequency power supply module and a DC power supply module fixedly mounted on the base plate;

[0010] The top cover assembly includes a top cover and a display module mounted on the top cover;

[0011] The converter board assembly includes a circuit board and a first converter mounted on the circuit board, and the converter board assembly is located within an accommodating space.

[0012] The rear cover assembly includes a rear cover and a first socket and a second socket mounted on the rear cover. The first socket is used to connect an external AC power source to power the diagnostic device, and the second socket is used to connect a connecting cable to connect the diagnostic device to the output socket of the dual synchro under test.

[0013] The intermediate frequency power supply module converts the external input AC power into the intermediate frequency AC power required by the diagnostic device and the tested dual synchro. The DC power supply module provides DC power to the first converter and the display module. The first converter is a dual-speed synchronous digital converter, which synchronously processes and combines the analog signals of the fine and coarse synchros into a single absolute angle digital value, which is parallel binary data. The display module displays the absolute angle digital value in real time in decimal form for the operator to judge the working status and perform zero-point consistency calibration.

[0014] Furthermore, guide grooves are provided on both the left and right side plates, and the converter plate assembly is inserted into the receiving space through the guide grooves for installation.

[0015] Furthermore, the converter board assembly also includes a second converter mounted on the circuit board, which is used to convert parallel binary data into BCD code signals.

[0016] Furthermore, the top cover assembly also includes a power switch and an indicator light; the power switch is used to control the main power supply of the diagnostic device; the indicator light is used to indicate the power-on status.

[0017] Furthermore, a display window matching the size of the display module is provided on the top cover.

[0018] Furthermore, the rear cover plate has mounting holes that match the first socket and mounting holes that match the second socket.

[0019] Furthermore, the display module includes six digital tubes, which are used to display the hundreds, tens, ones, tenths, hundredths, and thousandths values ​​of the angle, respectively.

[0020] On the other hand, a method for diagnosing the operating status and zero position of a dual self-synchro system is provided, based on the aforementioned device for diagnosing the operating status and zero position of a dual self-synchro system. This method includes the following steps:

[0021] Step 1: Connect the connecting cable between the output socket of the dual synchro and the second socket of the detection box;

[0022] Step 2: Connect the external AC power supply to the first socket of the test box;

[0023] Step 3: Activate the power module of the test box to supply power to the diagnostic device and the dual synchro unit;

[0024] Step 4: The analog signals from the fine and coarse synchro units are synchronously processed and synthesized into a parallel binary format absolute angle digital quantity through the first converter;

[0025] Step 5: Display the angle value in real time in decimal form through the display module;

[0026] Step 6: Determine the working status of the dual synchro system based on the displayed numerical changes;

[0027] Step 7: Perform zero-position consistency calibration based on the displayed value when the machine is at zero position.

[0028] Furthermore, step 5, the step of determining the working status of the dual auto-synchro system, includes:

[0029] Rotate the drive shaft of the double synchro;

[0030] Observe whether the value displayed on the display module changes continuously within the range of 000.000 to 360.000 without any jumps;

[0031] If the value changes continuously without any jumps, the dual auto-synchro system is considered to be working normally.

[0032] Furthermore, step 5, the step of performing zero-point consistency calibration, includes:

[0033] When the mechanical device connected to the dual self-synchro is in the mechanical zero position, observe the value displayed on the display module;

[0034] If the displayed value is not 000.000, adjust the rotor position of the fine synchro and / or coarse synchro until the displayed value is 000.000 to complete the zero-position consistency calibration.

[0035] The advantages of this invention are:

[0036] 1. This invention integrates the signal conversion unit, power module, and display unit into a compact detection box, equipped with connecting cables, achieving complete independence of the detection device. It can complete the entire detection process without relying on the main system for power. Furthermore, this invention converts the analog signal output from the dual synchro into a decimal value in "XXX.XXX" format for real-time and intuitive display. This completely changes the traditional method of relying on observing the on / off state of multiple LEDs for rough interpretation, allowing operators to directly and accurately read angle information. This not only eliminates human error but also provides a reliable data foundation for accurate diagnosis.

[0037] 2. The present invention adopts a near-end connection design, which effectively avoids the signal attenuation and interference problems caused by long-distance cable transmission, and ensures the stability of the detection signal and the reliability of the measurement results.

[0038] 3. This invention integrates two major functions: dynamic diagnosis of working status and zero-point consistency calibration. By observing the continuity and jumps of the displayed values ​​throughout the entire range, the dynamic working performance of the dual synchro system can be effectively judged; by observing and adjusting the displayed values ​​to zero when the mechanical zero position is reached, high-precision zero-point calibration can be quickly completed.

[0039] 4. In terms of device structure, this invention utilizes a modular mechanical design to rationally arrange each functional unit within a sealed accommodating space composed of multiple plates, resulting in a compact, robust, and portable overall structure. The device offers a simple and intuitive operation process, comprehensive functionality, and significantly improves the debugging efficiency and maintenance capabilities of the dual self-synchronizing machine system. Attached Figure Description

[0040] The above and / or other features and advantages of the present invention will become more readily understood from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0041] Figure 1 This is a schematic diagram showing the connection between the working state of the dual self-synchro system and the zero-position diagnostic device of the present invention;

[0042] Figure 2 This is a schematic diagram of the external structure of the detection box in this invention;

[0043] Figure 3 yes Figure 2 The diagram shows the internal structure of the detection box after the front cover is opened.

[0044] Figure 4 yes Figure 2 A rear view structural diagram of the detection box shown;

[0045] Figure 5 yes Figure 3 Schematic diagram of the midsole assembly;

[0046] Figure 6 yes Figure 3 Schematic diagram of the upper and middle cover plate assembly;

[0047] Figure 7 yes Figure 3 A schematic diagram of the structure of the converter board assembly;

[0048] Figure 8 yes Figure 2 Schematic diagram of the front cover plate;

[0049] Figure 9 yes Figure 3 Schematic diagram of the middle left side plate;

[0050] Figure 10 yes Figure 3 Schematic diagram of the middle right side plate;

[0051] Figure 11 yes Figure 4 Schematic diagram of the middle and rear cover plate;

[0052] Figure 12 yes Figure 5 Schematic diagram of the midsole plate;

[0053] Figure 13 yes Figure 6 Schematic diagram of the upper and middle cover plates;

[0054] Figure 14 This is a schematic diagram of the connecting cable in this invention.

[0055] In the diagram: 1-Front cover plate; 2-Upper cover plate assembly; 3-Converter board assembly; 4-Left side plate, 401-Left guide groove; 5-Base plate assembly; 6-Right side plate, 601-Right guide groove; 7-Fasting screw; 8-First socket; 9-Rear cover plate; 10-Second socket; 11-Base plate; 12-Intermediate frequency power module; 13-Fixing screw; 14-DC power module; 15-Upper cover plate; 16-Indicator light; 17-Power switch; 18-First PCB board; 19-First digital tube; 20-Second digital tube; 21-Third digital tube; 22-Fourth digital tube; 23-Fifth digital tube; 24-Sixth digital tube; 25-Second PCB board; 26-First converter; 27-Second converter; 28-First plug; 29-Second plug; 30-Cable. Detailed Implementation

[0056] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0057] It should be noted that, in the context of this invention, the terms “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “clockwise,” and “counterclockwise,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0058] Furthermore, terms such as "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0059] Reference Figure 1 The dual self-synchro system working status and zero position diagnostic device provided by the present invention includes a detection box and a connecting cable. The detection box is connected to the output socket X3 of the dual self-synchro via the connecting cable to form a complete detection system.

[0060] like Figure 2 , Figure 3 and Figure 4 As shown, the detection box is generally rectangular in shape, including a base plate assembly 5, an upper cover plate assembly 2, a converter plate assembly 3, a front cover plate 1, a rear cover plate 9, a left side plate 4, and a right side plate 6. These components are fastened together by fasteners, particularly fastening screws 7. The plates together form an accommodating space to house the functional modules of the diagnostic device inside the box. Meanwhile, the device's interface elements (such as switches, sockets, indicator lights, and display modules) are located on the surface of the box for operator operation or observation. Aluminum can be used as the material for each plate, but this is merely an example and not intended to limit the invention.

[0061] refer to Figure 5 and Figure 12The base plate assembly 5 includes a base plate 11, an intermediate frequency power module 12 and a DC power module 14 fixedly mounted on the base plate 11. The base plate 11 is a rectangular plate with a thickness of 10mm, a length of 200mm, and a width of 120mm. A through hole is provided in the middle for mounting the intermediate frequency power module 12 and the DC power module 14. Threaded stop holes are arranged around the base plate, and the base plate assembly is fixedly connected by screws. The intermediate frequency power module 12 is used to convert external input AC power into intermediate frequency AC power required by the device and the tested dual synchro unit. The DC power module 14 is used to provide DC operating power for the first converter 26, the second converter 27, and the display module, which will be described below. In some embodiments, the power modules are mounted on the base plate 11 by fixing screws 13, and the wiring terminals of the power modules face inwards to facilitate wiring.

[0062] like Figure 6 and Figure 13 As shown, the upper cover assembly 2 includes an upper cover 15 and a display module mounted on the upper cover 15. The display module is used to display angle information in real time in decimal numerical form. The upper cover 15 is a rectangular plate with a thickness of 10mm, a length of 200mm, and a width of 120mm. It has a display window that matches the size of the display module. The cover plate has threaded stop holes around its perimeter, and the upper cover assembly is fixedly connected by screws. In a preferred embodiment of the present invention, the display module includes a first PCB board (Printed Circuit Board) 18 in the form of a rectangular perforated plate and six digital tubes mounted on the first PCB board 18, namely the first digital tube 19, the second digital tube 20, the third digital tube 21, the fourth digital tube 22, the fifth digital tube 23, and the sixth digital tube 24, which are used to display the hundreds, tens, ones, tenths, hundredths, and thousandths values ​​of the angle, respectively. The 5V and ground output terminals of DC power supply 14 are connected to the power supply terminals of the first digital tube 19, the second digital tube 20, the third digital tube 21, the fourth digital tube 22, the fifth digital tube 23, and the sixth digital tube 24, respectively.

[0063] The upper cover assembly 2 also includes a power switch 17 and an indicator light 16. The power switch 17 is used to control the main power supply of the device, and the indicator light 16 is used to indicate the power-on status. For this purpose, the upper cover 15 has mounting holes that match the indicator light 16 and the power switch 17.

[0064] Reference Figure 7The converter board assembly 3 includes a second PCB board 25 and a first converter 26 mounted on the second PCB board 25. The converter board assembly 3 is located within the accommodating space of the housing. The first converter 26 is a dual-speed synchronous digital converter used to synchronously process and combine the analog signals from the fine and coarse synchrotrons into a single absolute angle digital value, which is parallel binary data. The excitation power supply for the first converter 26 is provided by the intermediate frequency power supply module 12, and the output terminal of the intermediate frequency power supply module 12 is connected to the power supply terminal of the first converter 26. The DC operating power supply for the first converter 26 is provided by the DC power supply module 14, and the 5V and ground output terminals of the DC power supply module 14 are connected to the power supply terminal of the first converter 26.

[0065] In a specific embodiment of the present invention, the converter board assembly 3 further includes a second converter 27 mounted on a second PCB board 25. The second converter 27 is used to convert parallel binary data into binary-to-decimal (BCD) signals to drive the display module. The signal output terminals of the first converter 26 are connected to the signal input terminals of the second converter 27, and the six sets of signal output terminals of the second converter 27 are connected to the signal input terminals of the first digital tube 19, the second digital tube 20, the third digital tube 21, the fourth digital tube 22, the fifth digital tube 23, and the sixth digital tube 24, respectively. The DC power supply for the second converter 27 is provided by a DC power supply module 14, and the 5V and ground output terminals of the DC power supply module 14 are connected to the power supply terminals of the second converter 27. This conversion is a crucial step in converting the internal binary angle data into driving signals suitable for decimal display, laying the foundation for subsequent intuitive display.

[0066] Reference Figure 8 The front cover plate 1 is a rectangular plate with a thickness of 2mm, a length of 200mm, and a width of 200mm. It has through holes around its perimeter and is fixedly connected to other plates by fasteners such as fastening screws 7, which serves to seal and protect the internal components of the detection box.

[0067] refer to Figure 9 and Figure 10 Both the left side plate 4 and the right side plate 6 are rectangular plates. The left side plate 4 is 10mm thick, 200mm long, and 120mm wide. The right side plate 6 is 10mm thick, 200mm long, and 120mm wide. The two plates are respectively provided with a left guide groove 401 and a right guide groove 601. Specifically, the guide groove is opened at the upper third of the plate. The guide groove is 5mm deep, 80mm long, and 6mm high. The converter plate assembly 3 is inserted into the receiving space through these two guide grooves for installation.

[0068] like Figure 4 and Figure 11As shown, the rear cover plate 9 is a rectangular plate with a thickness of 2mm, a length of 200mm, and a width of 200mm. The rear cover plate 9 has a rectangular through hole for installing the X1 socket (i.e., the first socket 8) and a circular through hole for installing the X2 socket (i.e., the second socket 10). Through holes are provided around the perimeter of the plate for securing it to other plates using fastening screws 7. The first socket 8 is used to connect to an external AC power source to power the diagnostic device; the second socket 10 is used to connect to a connecting cable to connect the diagnostic device to the output socket of the dual synchro unit under test. The fine synchro core wires of the second socket 10 are connected to the fine signal input terminal of the first converter 26; the coarse synchro core wires of the second socket 10 are connected to the coarse signal input terminal of the first converter 26. Specifically, one wire of the first socket 8 is connected to one end of the power switch 17, and the other end of the power switch 17 is connected to one end of the indicator light 16, one end of the intermediate frequency power module 12, and one end of the DC power module 14. The other wire of the first socket 8 is connected to the other end of the indicator light 16, the other end of the intermediate frequency power module 12, and the other end of the DC power module 14. The output terminal of the intermediate frequency power module 12 is connected to the power wire of the second socket 10.

[0069] Reference Figure 14 In the illustrated embodiment, the connecting cable includes a first plug 28, a second plug 29, and an insulated shielded cable 30. The core wires of the cable 30 are soldered one-to-one to the pins of the first plug 28 and the second plug 29. The cable 30 is a shielded cable used for signal transmission. The first plug 28 is used to connect to the second socket 10 (X2 socket) of the detection box, and the second plug 29 is used to connect to the output socket X3 of the coarse and fine synchro. In this way, the output signal of the synchro is introduced into the detection box through the connecting cable and the second socket 10 of the detection box.

[0070] During assembly, the base plate assembly 5, left side plate 4, right side plate 6, rear cover plate 9 and upper cover plate assembly 2 are first connected by fastening screws 7. Then, the converter plate assembly 3 is inserted into the guide groove. After the wiring is completed, the front cover plate 1 is connected by fastening screws 7.

[0071] Based on the above-described diagnostic device, the dual self-synchro system operating status and zero-position diagnostic method, as an exemplary embodiment of the present invention, includes the following steps:

[0072] Step S1, as follows Figure 1 As shown, connect the connecting cable between the output socket X3 of the dual synchro and the second socket (X2 socket) of the detection box;

[0073] Step S2, as follows Figure 1 As shown, connect the external AC power supply to the first socket (X1 socket) of the test box.

[0074] Step S3: Activate the power module of the test box to supply power to the diagnostic device and the dual synchro unit;

[0075] Step S4: The analog signals from the fine and coarse synchro units are synchronously processed and synthesized into a parallel binary format absolute angle digital quantity through the first converter.

[0076] Step S5: Display the angle value in real time in decimal form through the display module;

[0077] Step S6: Determine the working status of the dual self-synchro system based on the displayed numerical changes;

[0078] Step S7: Perform zero-position consistency calibration based on the displayed value when the machine is at zero position.

[0079] When using the device for diagnosis, connect the second plug 29 of the connecting cable to the dual synchro output socket, connect the first plug 28 to the second socket 10 of the test box, connect the 220V / 50Hz external AC power supply to the first socket 8, and then close the power switch 17. The indicator light 16 will light up, indicating that the device has started to supply power.

[0080] At this time, the intermediate frequency power supply module 12 provides 115V / 400Hz excitation power to the dual synchro and the first converter 26, and the DC power supply module 14 provides 5V DC operating power to the first converter 26, the second converter 27, and the digital tube. When the drive shaft of the dual synchro rotates, the first converter 26 synchronously processes and synthesizes the analog signals of the fine and coarse synchro into a parallel binary format absolute angle digital value. The second converter 27 converts this data into a BCD code signal, driving the digital tube to display the real-time angle value.

[0081] The operating status of the dual synchro system can be determined by observing whether the value displayed on the digital tube changes continuously within the range of 000.000 to 360.000 without any jumps. When the mechanical device connected to the dual synchro is in the mechanical zero position, the zero-position consistency calibration can be completed by observing whether the displayed value on the digital tube is 000.000 and adjusting the rotor position of the fine synchro and / or coarse synchro accordingly. After zeroing is completed, the rotor of the synchro is fixed in place.

[0082] This implementation method achieves complete independence of the detection device, which can complete the detection without relying on the main system to be powered on; the decimal value display is intuitive and accurate, avoiding the errors of traditional light-emitting diode reading; the modular structure is compact and portable, suitable for field use; at the same time, it has working status diagnosis and zero-point calibration functions, which significantly improves detection efficiency and reliability.

[0083] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered to be included within the scope of protection of the present invention.

Claims

1. A diagnostic device for the working status and zero position of a dual self-synchronizing system, characterized in that: The detection box and the connecting cable are included. The detection box includes a bottom plate assembly, an upper cover plate assembly, a converter plate assembly, a front cover plate, a rear cover plate assembly, a left side plate and a right side plate which are fixed by fasteners, and the plates collectively enclose a containing space. The bottom plate assembly includes a bottom plate, a medium-frequency power module and a direct-current power module which are fixedly installed on the bottom plate. The upper cover plate assembly includes an upper cover plate and a display module which is installed on the upper cover plate. The converter plate assembly includes a circuit board and a first converter which is installed on the circuit board, and the converter plate assembly is located in the containing space. The rear cover plate assembly includes a rear cover plate and a first socket and a second socket which are installed on the rear cover plate, the first socket is used for connecting an external alternating current power supply to power the diagnostic device, and the second socket is used for connecting the connecting cable to connect the diagnostic device with the output socket of the measured double self-homing angle machine. The medium-frequency power module is used for converting external input alternating current into medium-frequency alternating current required by the diagnostic device and the measured double self-homing angle machine, the direct-current power module is used for providing direct-current working power for the first converter and the display module, the first converter is a double-speed synchronous digital converter which is used for synchronously processing analog signals of the fine and coarse self-homing angle machines and combining them into an absolute angle digital quantity which is parallel binary data, and the display module is used for displaying the absolute angle digital quantity in the form of decimal numerical value in real time to enable an operator to judge the working state and calibrate the zero position consistency.

2. The system for diagnosing the operating state and zero position of a double interlock mechanism according to claim 1, characterized in that: The left side plate and the right side plate are each provided with a guide groove, and the converter plate assembly is inserted into the containing space through the guide groove for installation.

3. The dual self-synchro system operating status and zero-position diagnostic device according to claim 1, characterized in that: The converter plate assembly further includes a second converter which is installed on the circuit board and is used for converting the parallel binary data into BCD code signals.

4. The system of claim 1, wherein: The upper cover plate assembly further includes a power-on switch and an indicator lamp, the power-on switch is used for controlling the on-off of the total power supply of the diagnostic device, and the indicator lamp is used for indicating the power-on state.

5. The system of claim 1, wherein: The upper cover plate is provided with a display window which matches the size of the display module.

6. The system of claim 1, wherein: The rear cover plate is provided with a mounting hole which matches the first socket and a mounting hole which matches the second socket.

7. The system for diagnosing the operating state and zero position of a double interlock mechanism according to any one of claims 1 to 6, characterized in that: The display module includes six nixie tubes which are respectively used for displaying the values of the hundreds, tens, units, tenths, hundredths and thousandths of the angle.

8. A method for diagnosing the working state and zero position of a double self-acting machine system, characterized in that, The double self-homing angle machine system working state and zero position diagnostic device is implemented based on the double self-homing angle machine system working state and zero position diagnostic device of any one of claims 1 to 7, and the method includes the following steps: Step 1, connecting the connecting cable between the output socket of the double self-homing angle machine and the second socket of the detection box; Step 2, connecting the external alternating current power supply to the first socket of the detection box; Step 3, starting the power module of the detection box to power the diagnostic device and the double self-homing angle machine; Step 4, synchronously processing the analog signals of the fine and coarse self-homing angle machines by the first converter to combine them into an absolute angle digital quantity in parallel binary format; Step 5, displaying the angle value in the form of decimal numerical value in real time by the display module; Step 6, judging the working state of the double self-homing angle machine system according to the numerical value change. Step 7, when the mechanical zero is at, the displayed value is used to calibrate the zero consistency.

9. The method of claim 8, wherein the method further comprises: In step 5, the step of judging the working state of the double self-acting angle system comprises: rotating the transmission shaft of the double self-acting angle; observing whether the value displayed by the display module continuously changes and has no jump within the range of 000.000 to 360.000; if the value continuously changes and has no jump, it is determined that the double self-acting angle system is working normally.

10. The method of claim 8 or 9, wherein the method further comprises: In step 5, the step of calibrating the zero consistency comprises: when the mechanical device connected to the double self-acting angle is at the mechanical zero, observing the value displayed by the display module; if the displayed value is not 000.000, adjusting the rotor position of the fine self-acting angle and / or the coarse self-acting angle until the displayed value is 000.000, completing the zero consistency calibration.

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