Angle measurement circuit board and navigation circuit board test system and test method

Abstract

The invention discloses an angle measurement type circuit board and navigation type circuit board test system which is connected with a tested angle measurement type circuit board or a tested navigation type circuit board and comprises an axial angle signal generating device, a replaceable switching mother board and a computer, the replaceable switching mother board is a PCB, the axial angle signal generating device sends axial angle signals to the replaceable switching mother board, and the computer sends the axial angle signals to the replaceable switching mother board. The shaft angle signal is transmitted to the detected angle measurement circuit board or the detected navigation circuit board by the replaceable switching mother board, and the detected angle measurement circuit board or the detected navigation circuit board outputs a detection signal after receiving the shaft angle signal and transmits the detection signal to the computer through the replaceable switching mother board. And the computer is provided with auxiliary test software for receiving the detection signal transmitted by the replaceable switching mother board and giving out a detection result. The invention further discloses an angle measurement circuit board and navigation circuit board testing method. The method guarantees the objectivity of the detection result, facilitates the tracing of the detection result, improves the detection efficiency, and can be widely used in the field of electrical function testing.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrical function test, in particular to a kind of angle measurement circuit board and navigation circuit board test system and test method. BACKGROUND

[0002] Rotary transformer and synchro are widely used in aerospace, ship, industrial control and other precision manufacturing field angle, attitude measurement mechanism.Angular measurement, navigation circuit board is the key link of the angular signal output by rotary transformer and synchro into specific angle, attitude, navigation information.Angular measurement, navigation circuit board is more and more widely used in precision manufacturing field, and also needs to be matched with detection equipment and software to detect the correctness of angular measurement, navigation output data efficiently. SUMMARY

[0003] The present application aims to overcome the shortcomings of the above background art, provide an angle measurement circuit board and navigation circuit board test system and test method, which formulates test requirements through man-machine interface, records, saves, calculates and outputs test results of sampling data, ensures the objectivity of detection results, facilitates the traceability of detection results, saves labor cost and improves detection efficiency.

[0004] The present application provides an angle measurement circuit board and navigation circuit board test system connected with the measured angle measurement circuit board or measured navigation circuit board, which comprises an angular signal generating device, a replaceable adapter motherboard and a computer, the replaceable adapter motherboard is a PCB, the angular signal generating device sends angular signal to the replaceable adapter motherboard, the angular signal is transmitted to the measured angle measurement circuit board or measured navigation circuit board by the replaceable adapter motherboard, the measured angle measurement circuit board or measured navigation circuit board outputs detection signal after receiving the angular signal and transmits the detection signal to the computer through the replaceable adapter motherboard, and the computer is provided with auxiliary test software for receiving the detection signal transmitted by the replaceable adapter motherboard and giving detection results.

[0005] In the above technical solution, the angular signal generating device is a digital sine machine.

[0006] In the above technical solution, it further comprises an angle display panel for transmitting the detection signal emitted by the replaceable adapter motherboard to the auxiliary test software through 422 serial port.

[0007] In the above technical solution, the replaceable adapter motherboard is provided with channel gating switch, angular signal input interface connected with the digital sine machine, angular signal output interface connected with the measured angle measurement circuit board or measured navigation circuit board and digital interface corresponding to the angle display panel.

[0008] In the technical scheme, the auxiliary test software is composed of an information input area, a test preparation area, a project selection area, a test display area and a result recording area; the information input area includes an operator information area for inputting operator information and a product code area and a circuit board type area for displaying information of the measured angle circuit board or the measured navigation circuit board; the test preparation area includes a VISA resource name area for selecting a 422 communication port, a serial port button and a serial port state lamp for opening or closing a computer sampling serial port, and a preparation information area for prompting replaceable adapter board selection information and digital sine machine output parameter; the project selection area includes a test project and rate selection area set according to a current test project and input signal rate requirement, a start button area and an angle setting area set according to a requirement of the digital sine machine on a start angle and a target angle in a corresponding project, and a test lamp that flashes when data is processed; the test display area includes a parameter display area and an angle display area, wherein the parameter display area includes a current angle value result for displaying a current collected angle value, an angle recording area for displaying historical sampling values, a waveform display area for displaying a collected angle curve and checking whether the angle has a jump, and a button for controlling a range of a vertical and horizontal axis of the curve; and the result recording area includes a record column for displaying test records and results, and an error value column for counting a number of times of abnormal values in a test process.

[0009] In the technical scheme, the digital sine machine sends shaft angle signals in the form of resolver signals and self-encoder signals, and excitation signals; the measured angle circuit board or the measured navigation circuit board transmits parallel port signals as detection signals to the replaceable adapter board, the replaceable adapter board transmits the parallel port signals to the angle display board, the angle display board converts the parallel port signals into serial port signals and transmits the serial port signals to the auxiliary test software; and the channel gate switch on the replaceable adapter board is a jumper switch.

[0010] In the technical scheme, a test case is provided with a switch power supply, two ends of an inner wall of the test case are respectively provided with horizontally arranged first slots, the replaceable adapter board is horizontally arranged in the test case, two ends of the replaceable adapter board are respectively inserted into corresponding first slots, two ends of an inner wall of the test case are respectively provided with second slots vertically connected with the first slots, two ends of the measured angle circuit board or the measured navigation circuit board are respectively inserted into corresponding second slots, a shaft angle signal input interface and a shaft angle signal output interface are respectively located at the top of the replaceable adapter board on two sides of the measured angle circuit board or the measured navigation circuit board, and the angle display board is arranged on a side wall of the test case.

[0011] The application also provides a test method for the angle measuring circuit board and the navigation circuit board, comprising the following steps: step one, a replaceable adapter motherboard is designed and manufactured according to the interface definition of the measured angle measuring circuit board or the measured navigation circuit board, the interfaces on the replaceable adapter motherboard correspond to the interfaces of the shaft angle signal generating device and the interfaces of the measured angle measuring circuit board or the measured navigation circuit board respectively, and the line connection between the interfaces is completed by PCB wiring; step two, the shaft angle signal generating device starts to output shaft angle signals at a constant speed, and the auxiliary test software detects the starting angle and then starts the processing flow and outputs the test starting time; step three, as a free installation.exe application program, the auxiliary test software performs difference calculation and comparison on the current frame angle and the previous frame angle in real time, and if the difference exceeds the change range test threshold value or the angle difference and the angle change direction symbol are inconsistent, the computer as the upper computer judges that the angle is abnormal; step four, the auxiliary test software outputs the time, angle position and deviation of the abnormal angle value, and counts the cumulative error value, and informs the test result of the project after reaching the target angle.

[0012] In the above technical solution, in the step two, the shaft angle signal generating device is a digital sine machine; in the step three, in the difference calculation, the change range test threshold value of the small angle test is 0.006°, and the change range test threshold value of the large angle test is 1°; if the difference is negative in the positive angle test or the difference is positive in the negative angle test, it is determined that the angle difference and the angle change direction symbol are inconsistent.

[0013] In the above technical solution, step five, the "small rate positive", "small rate negative", "large rate positive" and "large rate negative" four project tests are completed in turn according to the prompt, and finally the test conclusion is output, if no error occurs in the whole process, the prompt "circuit board has passed the test" will be given, otherwise the prompt "circuit board has not passed the test" will be given; step six, after the test is completed, the auxiliary test software collects data and saves the test record to the computer, the saved data format is.txt file, and the computer outputs the test report and test record file for result review.

[0014] The angle measuring circuit board and the navigation circuit board test system and the test method have the following beneficial effects: 1) The replaceable test motherboard is adopted, the external soldering connection adapter tool is replaced by the PCB wiring mode, the remaining external interface types remain the same except the interface of the measured circuit board, frequent replacement of test cables is avoided, the circuit board is conveniently disassembled and replaced, the measured circuit board can be assisted to support and fix, the space is optimized, the test efficiency and the universality are improved.

[0015] 2) The auxiliary test software is a free installation.exe application program, the operation is simple and convenient, the test requirements are prompted throughout the process, the operator can be facilitated to perform, and the probability of operation error can be significantly reduced.

[0016] 3) The shaft angle signal generating device can output the self-acting angle and rotary variable signals according to the set simulation of the actual application scene, and can realize the uniform change of the rate and smoothly resolve the measured angle circuit board or the measured navigation circuit board according to the set target angle. Moreover, the shaft angle signal generating device is small in size, can be set at will, meets the test requirements in accuracy, and improves the test efficiency.

[0017] 4) The test items cover the slow speed, small angle range test and the fast speed, large angle range test, and the test accuracy and the test efficiency are considered at the same time.

[0018] 5) The data recording and saving in the test process do not need manual transcription, human errors are reduced, human resources are saved, and the detection and analysis efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall structural view of the angle measuring circuit board and navigation circuit board test system embodiment 1 of the application. Figure 2 It is the structural side view of the test machine case and the attached components in the angle measuring circuit board and navigation circuit board test system embodiment 1 of the application. Figure 3 It is the structural top view of the test machine case and the attached components in the angle measuring circuit board and navigation circuit board test system embodiment 1 of the application. Figure 4 It is the electrical schematic diagram of the angle measuring circuit board and navigation circuit board test system embodiment 1 of the application. Figure 5 It is the test item comparison diagram of the angle measuring circuit board and navigation circuit board test system embodiment 1 of the application. Figure 6 It is the interface diagram of the auxiliary test software of the angle measuring circuit board and navigation circuit board test system embodiment 2 of the application. Figure 7 It is the interface diagram of the information input area in the angle measuring circuit board and navigation circuit board test system embodiment 2 of the application. Figure 8 It is the interface diagram of the test preparation area in the angle measuring circuit board and navigation circuit board test system embodiment 2 of the application. Figure 9 It is the interface diagram of the item selection area in the angle measuring circuit board and navigation circuit board test system embodiment 2 of the application. Figure 10 It is the interface diagram of the test display area in the angle measuring circuit board and navigation circuit board test system embodiment 2 of the application. Figure 11 It is the interface diagram of the result recording area in the angle measuring circuit board and navigation circuit board test system embodiment 2 of the application. Figure 12 The flowchart of the test method of the angle measuring circuit board and the navigation circuit board is shown. DETAILED DESCRIPTION

[0020] The application will be further described in detail below with reference to the accompanying drawings and examples, but the examples should not be understood as limiting the application.

[0021] The application aims at the deficiencies of the prior art and determines the following goals as the invention purposes: 1) Realize the paperless and semi-automatic test process of the angle measuring circuit board and the navigation circuit board, including the selection of the replaceable adapter board 4, the input shaft angle signal setting, etc., which can be automatically prompted according to the selected measured angle measuring circuit board or measured navigation circuit board 6, the angle data is automatically collected and calculated, the production detection and analysis efficiency is improved, and the error probability caused by manual searching and value recording is reduced.

[0022] 2) For the case that the tooling of different types of measured angle measuring circuit board or measured navigation circuit board 6 is complicated and difficult to access, the replaceable adapter board 4 is used to customize the measured angle measuring circuit board or measured navigation circuit board 6, unify the input and output interfaces and tooling sizes, improve the test efficiency, and facilitate the tooling access and use.

[0023] Example 1 The angle measuring circuit board and navigation circuit board test system of the application is composed of a test case 2, a computer 3, a digital sine machine 1, a replaceable adapter board 4 and auxiliary test software.

[0024] As Figure 1 The physical diagram of the system involved in this embodiment is composed of a digital sine machine 1, a test case 2, a computer 3, a replaceable adapter board 4, and an angle display board 5 installed on the front cover of the test case 2, and the measured angle measuring circuit board or measured navigation circuit board 6 is installed above the replaceable adapter board 4.

[0025] Figures 2-3 The schematic diagram of the test case 2, the replaceable adapter board 4 and the measured angle measuring circuit board or measured navigation circuit board 6 installation cooperation involved in this example is shown, the replaceable adapter board 4 is installed in the first slot 28 of the test case 2, the external interface of the measured angle measuring circuit board or measured navigation circuit board 6 is connected with the corresponding interface of the replaceable adapter board 4, and the measured angle measuring circuit board or measured navigation circuit board 6 is fixed through the locking strips at both ends and the second slot 29 of the test case 2.

[0026] The test case 2 is provided with an angle display board 5 and a switching power supply; the test case 2 is fixed with the angle display board 5 at the front end, the angle display board 5 can directly display the angle value output after the input angle of the measured angle measuring circuit board or the measured navigation circuit board 6 is read, and the output angle value is sent to the auxiliary test software through the 422 serial port; the switching power supply supplies power for the angle display board 5 and the measured angle measuring circuit board or the measured navigation circuit board 6.

[0027] The replaceable adapter board 4 is designed and manufactured according to the interface definition of the measured angle measuring circuit board or the measured navigation circuit board 6, the replaceable adapter board 4 is provided with an axis angle signal input interface 41 corresponding to the interface of the digital sine machine 1, an axis angle signal output interface 42 corresponding to the interface of the measured angle measuring circuit board or the measured navigation circuit board 6, and an interface corresponding to the angle display board 5, the replaceable adapter board 4 is also provided with a channel gating switch (not shown in the figure), for the multi-channel circuit board, the channel gating switch can be used for channel gating, in the embodiment, the channel gating switch is a jumper switch; the line routing between the interfaces is completed through PCB wiring, and the replaceable adapter board 4 is installed in the middle slot of the test case 2 during testing.

[0028] Figure 4 The electrical schematic diagram related to the present example is shown, the digital sine machine 1 sends the resolver, self-encoder and excitation signal, and transmits the signals to the measured angle measuring circuit board or the measured navigation circuit board 6 through the replaceable adapter board 4. The replaceable adapter board 4 transmits the parallel port signal output by the measured angle measuring circuit board or the measured navigation circuit board 6 to the angle display board 5. The angle display board 5 receives the parallel angle signal, and sends the angle value to the upper computer through the communication interface.

[0029] Figure 5 The four test items of “small rate positive direction”, “small rate negative direction”, “large rate positive direction” and “large rate negative direction” related to the present example are shown, and the specific content is shown in the figure.

[0030] Embodiment 2 The embodiment is basically the same as embodiment 1, and the difference is that: As Figure 6 shown, the auxiliary test software is compiled by using the labview of the NI company, as an installation-free.exe application program, and adopts the RS422 software interface protocol to communicate and sample data with the replaceable adapter board 4 and the measured angle measuring circuit board or the measured navigation circuit board 6 in the test case 2, Figure 7The operation interface of the software is shown in the figure, which is composed of an information input area 7, a test preparation area 8, a project selection area 9, a test display area 10 including a parameter display area and an angle display area, and a result recording area 11. The information input area 7 is used to input the information of the operator, the measured angle circuit board or the measured navigation circuit board 6, select the product code and type of the measured angle circuit board or the measured navigation circuit board 6, and the test preparation area 8 is used to open or close the sampling serial port, prompt the selection information of the replaceable adapter board 4 and the output parameters of the corresponding digital sine machine 1. The project selection area 9 is used to prompt the current test project and input signal rate setting requirements, and set the starting angle and target angle according to the starting angle and target angle setting requirements of the corresponding project in the digital sine machine 1. The parameter display area in the test display area 10 displays the current angle value result 23, and the angle recording area 24 is used to display 18 groups of sampling historical values. The angle recording area 24 displays the collected angle curve, which can be directly observed to check whether there is a jump in the angle and other conditions, and the curve vertical and horizontal axis range can also be controlled through the buttons above the waveform display area 25. The result recording area 11 has a test record and result recording column 26, and if there is abnormal angle data, it will also be displayed, and the right error value column 27 is used to count the number of abnormal values in the test process.

[0031] Figure 7 The information input area 7 is shown in the figure, wherein the operator information area 12 is used to fill in the operator information, the project code and board number area is used to fill in the circuit board information, the product code area 13 is a code menu of all the measured angle circuit boards or measured navigation circuit boards 6, and the corresponding equipment code of the measured angle circuit board or measured navigation circuit board 6 can be selected. The circuit board type area 14 corresponds to the menu which will change with the confirmation of the product code area 13, and the display product code area 1 displays the corresponding name of the measured angle circuit board or measured navigation circuit board 6, which is used for the operator to select and confirm.

[0032] Figure 8 The test preparation area 8 is shown in the figure, wherein the VISA resource name area 15 is a selection menu of the 422 communication port, the open serial port button 16 can control the opening and closing of the serial port, and if the serial port is successfully opened, the serial port status light 17 will be lit. The preparation information area 18 is automatically displayed after the menu selection of the circuit board type area 14 is completed, and the operator can select the corresponding replaceable adapter board 4 and complete the parameter setting according to the prompt.

[0033] Figure 9The project selection area 9, the test item and the rate selection area 19 display the test direction and the angle change rate corresponding to the current test item, the start button area 20 is a test start button, and after being clicked, the current angle value result 23 reaches the starting angle in the angle setting area 21, and then the data is processed. The starting angle and the target angle in the current angle value result 23 display the starting angle and the ending angle required by the test. The test lamp 22 flashes when processing data.

[0034] Figure 10 The test display area 10 is the current angle value result 23, the angle record area 24 displays the previous 18 groups of historical angle values, and the waveform display area 25 displays the graph formed by each historical angle, so that the operator can intuitively view the angle smoothness.

[0035] Figure 11 The result record area 11 is that all test information, abnormal data and test results are displayed in the record area 26, and the error value cumulative count is displayed in the error value area 27. After the test is completed, the data in the record area 26 and the angle sampling data are automatically saved in a designated folder in a.txt format.

[0036] Example 3 Figure 12 The flowchart shown is related to the present embodiment, and the angle measuring circuit board and the navigation circuit board test method, which comprises the following steps: 1) In the auxiliary test software, the item code and the name of the measured angle measuring circuit board or the measured navigation circuit board 6 are selected, the parameter setting of the digital sine machine 1 is completed according to the prompt of the pre-test preparation information area 18, the corresponding replaceable adapter motherboard 4 is selected, and the measured angle measuring circuit board or the measured navigation circuit board 6 is fastened to the replaceable adapter motherboard 4 after being installed on the test machine box 2.

[0037] 2) The test machine box 2 is powered on, the digital sine machine 1 output switch is turned on, and the measured angle measuring circuit board or the measured navigation circuit board 6 converts the input shaft angle signal into a parallel port signal and sends it to the angle display board 5. After processing, the angle display board 5 displays the current angle value on the front surface and communicates with the auxiliary test software through the RS422 communication port.

[0038] 3) The auxiliary test software receives the serial port signal, refreshes the latest angle result and the angle record in the parameter display area, and draws a curve. The operator selects the test button of the start button area 20, completes the setting of the starting angle, the target angle and the rate on the digital sine machine 1 according to the prompt of the project selection area 9.

[0039] 4) The digital sinusoidal machine 1 starts to output the constant speed shaft angle signal, and the auxiliary test software automatically starts the starting process after detecting the starting angle, outputs the test starting time in the result recording area 11, and the auxiliary test software calculates and compares the current frame angle and the previous frame angle in real time, if the difference exceeds the change range test threshold, or the angle difference and the angle change direction symbol are inconsistent, the upper computer will judge it as an abnormal angle, in this embodiment, the change range test threshold of the small angle test is 0.006°, and the change range test threshold of the large angle test is 1°; if the difference is negative in the positive angle test, or the difference is positive in the negative angle test, it is determined that the angle difference and the angle change direction symbol are inconsistent. The time, angle position and deviation of the abnormal value are displayed in the lower recording column 26, and the cumulative error value in the error value column 27 is counted. After reaching the target angle, a pop-up box prompts the test result of this project.

[0040] 5) The operator completes the "small rate positive", "small rate negative", "large rate positive" and "large rate negative" test projects in turn according to the prompts, and finally outputs the test conclusion in the result recording area 11. If no error occurs during the whole process, it will prompt "the circuit board has passed the test", otherwise it will prompt "the circuit board has not passed the test".

[0041] 6) After the test is completed, the auxiliary test software will automatically complete the acquisition of data and save the test record to the local, and the saved data format is.txt file, and the upper computer will output the test report and test record file, which is convenient for further troubleshooting and result review.

[0042] The application designs a kind of angle measuring circuit board and navigation circuit board test system and test method, through replaceable adapter motherboard 4, it is suitable for different interface definitions of the measured angle measuring circuit board or the measured navigation circuit board 6 electrical interface, angle display panel 5 is used to complete angle value display and transmission, finally by the upper computer auxiliary test software completes automatic acquisition, stores angle data, and outputs the result judgment.

[0043] The angle measuring circuit board and navigation circuit board test system can be used for testing different types of measured angle measuring circuit boards or measured navigation circuit boards 6 through replaceable adapter motherboard 4, simplifying the test process, and formulating test requirements through human-computer interaction interface, recording, saving, calculating and outputting test results, ensuring the objectivity of test results, facilitating the traceability of test results, saving labor cost and improving detection efficiency.

[0044] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

[0045] Material not described in detail herein is considered to be conventional in the art by those skilled in the art.

Claims

1. A testing system for angle measuring circuit boards and navigation circuit boards, connected to the angle measuring circuit board or the navigation circuit board under test (6), characterized in that: The system includes an axis angle signal generator, a replaceable adapter motherboard (4), and a computer (3). The replaceable adapter motherboard (4) is a PCB board. The axis angle signal generator sends an axis angle signal to the replaceable adapter motherboard (4). The axis angle signal is transmitted by the replaceable adapter motherboard (4) to the circuit board under test for angle measurement or the circuit board under test for navigation (6). After receiving the axis angle signal, the circuit board under test for angle measurement or the circuit board under test for navigation (6) outputs a detection signal and transmits it to the computer (3) through the replaceable adapter motherboard (4). The computer (3) is equipped with auxiliary testing software that receives the detection signal transmitted by the replaceable adapter motherboard (4) and provides the detection result.

2. The testing system for angle measuring circuit boards and navigation circuit boards according to claim 1, characterized in that: The shaft angle signal generating device is a digital sine machine (1).

3. The testing system for angle measuring circuit boards and navigation circuit boards according to claim 2, characterized in that: It also includes transmitting the detection signal emitted by the replaceable adapter motherboard (4) to the angle display board (5) of the auxiliary test software via the 422 serial port.

4. The testing system for angle measuring circuit boards and navigation circuit boards according to claim 3, characterized in that: The replaceable adapter motherboard (4) is equipped with a channel selection switch, an axis angle signal input interface (41) connected to the digital sine machine (1), an axis angle signal output interface (42) connected to the circuit board for measuring angles or the circuit board for navigation (6) under test, and a digital interface corresponding to the angle display board (5).

5. The testing system for angle measuring circuit boards and navigation circuit boards according to claim 4, characterized in that: The auxiliary testing software consists of an information input area (7), a test preparation area (8), a project selection area (9), a test display area (10), and a result recording area (11). The information input area (7) includes an operator information area (12) for inputting operator information, a product code area (13) for displaying the information of the tested angle circuit board or the tested navigation circuit board (6), and a circuit board type area (14). The test preparation area (8) includes a VISA resource name area (15) for selecting the 422 communication port, a serial port button (16) and a serial port status light (17) for opening or closing the computer (3) sampling serial port, and a preparation information area (18) for indicating the selection information of the replaceable adapter motherboard (4) and the output parameters of the digital sine machine (1). The project selection area (9) includes settings according to the current test project and input signal rate requirements. The test item and rate selection area (19), the start button area (20) and the angle setting area (21) set the starting angle and target angle according to the requirements of the digital sine machine (1) in the corresponding project, and the test light (22) flashes when processing data; the test display area (10) includes a parameter display area and an angle display area, wherein the parameter display area includes the current angle value result (23) that displays the current collected angle value, the angle record area (24) that displays the historical sampled value, the angle curve that displays the collected angle and whether there is an angle jump, and the waveform display area (25) that controls the range of the vertical and horizontal axes of the curve by the button; the result record area (11) includes a record column (26) that displays the test record and result, and an error value column (27) that counts the number of abnormal values ​​that occur during the test process.

6. The testing system for angle measuring circuit boards and navigation circuit boards according to claim 5, characterized in that: The digital sine machine (1) sends shaft angle signals, which are manifested as resolvers, self-aligning signals, and excitation signals; the test angle circuit board or the test navigation circuit board (6) transmits the parallel port signal as a detection signal to the replaceable adapter motherboard (4), the replaceable adapter motherboard (4) transmits the parallel port signal to the angle display board (5), the angle display board (5) converts the parallel port signal into a serial port signal and transmits it to the auxiliary test software; the channel selection switch on the replaceable adapter motherboard (4) is a jumper switch.

7. The testing system for angle measuring circuit boards and navigation circuit boards according to claim 6, characterized in that: It also includes a test chassis (2) with a switching power supply. The test chassis (2) has a first slot (28) set horizontally at both ends of its inner wall. The replaceable adapter motherboard (4) is set horizontally inside the test chassis (2). The two ends of the replaceable adapter motherboard (4) are respectively inserted into the corresponding first slot (28). The two ends of the inner wall of the test chassis (2) are respectively provided with a second slot (29) that is vertically connected to the first slot (28). The two ends of the tested angle circuit board or the tested navigation circuit board (6) are respectively inserted into the corresponding second slot (29). The axis angle signal input interface (41) and the axis angle signal output interface (42) are respectively located on the top of the replaceable adapter motherboard (4) on both sides of the tested angle circuit board or the tested navigation circuit board (6). The angle display board (5) is set on the side wall of the test chassis (2).

8. A testing method for angle measuring circuit boards and navigation circuit boards, characterized in that: Includes the following steps: Step 1: Design and manufacture a replaceable adapter motherboard (4) according to the interface definition of the angle-measuring circuit board or the navigation circuit board (6) under test. The interfaces on the replaceable adapter motherboard (4) correspond to the interface of the axial angle signal generator and the interface of the angle-measuring circuit board or the navigation circuit board (6) under test, respectively. The lines between each interface are completed through PCB wiring. Step 2: The shaft angle signal generator starts to output shaft angle signals at a constant speed. After the auxiliary test software detects the starting angle, it starts the processing flow and outputs the test start time. Step 3: As an installation-free .exe application, the auxiliary testing software calculates and compares the difference between the current frame angle and the previous frame angle in real time. If the difference exceeds the change range test threshold, or the angle difference is inconsistent with the sign of the angle change direction, the computer (3) acting as the host computer judges it as an abnormal angle. Step 4: The auxiliary testing software outputs the time, angle position, and deviation of the abnormal angle value, and calculates the cumulative error value. After the target angle is reached, the test results for this project are reported.

9. The testing method for angle measuring circuit boards and navigation circuit boards according to claim 8, characterized in that: In step two, the shaft angle signal generating device is a digital sine machine (1). In step three, when calculating the difference, the test threshold for the range of change of small angle test is 0.006°, and the test threshold for the range of change of large angle test is 1°. If the difference is negative in the positive angle test, or positive in the negative angle test, then the sign of the angle difference is considered inconsistent with the direction of angle change.

10. The testing method for angle measuring circuit boards and navigation circuit boards according to claim 9, characterized in that: It also includes step five, following the prompts to complete the four tests in sequence: "Small speed positive", "Small speed negative", "Large speed positive", and "Large speed negative". Finally, the test results are output. If no errors occur throughout the process, it will prompt "Circuit board has passed the test"; otherwise, it will prompt "Circuit board has failed the test". Step 6: After the test is completed, the auxiliary testing software collects data and saves the test records to the computer (3). The data is saved in .txt format. The computer (3) will output the test report and test record file for result review.

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