Inspection tester for air inlet channel inclined plate adjusting system

Abstract

The utility model relates to an air inlet channel inclined plate adjusting system inspection tester, which comprises a case and a peripheral input device, a socket interface is arranged on the case, a main control board, a touch control board, a signal processing board and a power supply are arranged in the case, the main control board is respectively in signal connection with the touch control board, the signal processing board and the peripheral input device, and the power supply is connected with the power supply. The signal processing board is also in signal connection with the socket interface; the main control board is in communication connection with the touch control board; the main control board is in circuit connection with the signal processing board; the peripheral input equipment is in circuit connection with the main control board; the socket interface is in circuit connection with the signal processing board; the air inlet channel inclined plate adjusting system inspection tester has the advantages that the air inlet channel inclined plate adjusting system inspection tester is highly integrated and convenient to control and adjust, and the problems that technical updating of an inspection tester is inconvenient, a host of an original inspection tester is heavy, and operation and adjustment of an operator are inconvenient when the air inlet channel inclined plate adjusting system is detected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of inlet ramp adjustment, in particular to an inspection instrument for an inlet ramp adjustment system. Background Technique

[0002] The inspection instrument for the inlet ramp adjustment system controls the controller of the inlet ramp adjustment system to adjust the ramp release amount by simulating parameters such as N1 speed, aircraft flight Mach number, and aircraft flight altitude. At the same time, by collecting signals such as signals from the ramp position sensor, the current magnitude of the hydraulic mechanism, and the amplitude of the control signal, etc., to determine whether the adjustment law is qualified.

[0003] The existing equipment is connected to the controller through cables. The signals are conditioned by the signal conditioning circuit board and then sent to the PC104 acquisition card for acquisition. The output signals are output by the PC104 signal card and then output to the controller through the conditioning circuit. The main control is the PC104 platform, and the touch screen is used to display and operate data.

[0004] The existing equipment has the problems that the equipment was finalized relatively early, and the technologies adopted, such as PC104, are now on the verge of being phased out, and at the same time, the cost is high; the existing equipment uses operating systems such as WINDOWS98 or WINDOWS2000, the operating systems are old, and the equipment startup preparation time is too long (more than 3 minutes); the existing equipment host is bulky (16 kg, 480×320×300 mm); during operation, the relationship between the simulated N1 signal and temperature appears in a table, and the operator needs to obtain the table and look it up before controlling the equipment to output the N1 signal, which is inconvenient to operate.

[0005] Therefore, the utility model provides an inspection instrument for an inlet ramp adjustment system. Content of the Utility Model

[0006] The purpose of the utility model is to overcome the shortcomings of the existing technology, and provide an inspection instrument for an inlet ramp adjustment system with high integration and convenient control and adjustment, which solves the problems that it is inconvenient to update the technology of the inspection instrument, the original inspection instrument host is bulky, and it is inconvenient for the operator to operate and adjust when detecting the inlet ramp adjustment system.

[0007] The purpose of the utility model is realized through the following technical solutions: an inspection instrument for an inlet ramp adjustment system, including a chassis and a peripheral input device, a socket interface is arranged on the chassis, a main control board, a touch panel, a signal processing board and a power supply are arranged in the chassis, the main control board is respectively signal-connected to the touch panel, the signal processing board and the peripheral input device, and the signal processing board is also signal-connected to the socket interface;

[0008] The main control board is communicatively connected to the touch panel; the main control board is circuit-connected to the signal processing board; the peripheral input device is circuit-connected to the main control board; the socket interface is circuit-connected to the signal processing board;

[0009] The first output terminal of the power supply is connected to the power supply input terminal of the main control board, the second output terminal of the power supply is connected to the power supply input terminal of the touch panel, and the third output terminal of the power supply is connected to the power supply input terminal of the signal processing board.

[0010] Further, the signal processing board includes: a signal acquisition circuit, a signal conditioning circuit, a signal interface circuit, an AD conversion circuit, and a relay switching circuit;

[0011] The input terminal of the signal acquisition circuit is used to be connected to the first signal terminal of the board under test, and the output terminal of the signal acquisition circuit is connected to the first signal terminal of the signal conditioning circuit;

[0012] The first communication terminal of the signal conditioning circuit is used to be connected to the first communication terminal of the board under test, the second communication terminal of the signal conditioning circuit is connected to the main control board, the output terminal of the signal conditioning circuit is connected to the input terminal of the AD conversion circuit, and the output terminal of the AD conversion circuit is connected to the main control board;

[0013] The input terminal of the relay switching circuit is connected to the main control board, and the output terminal of the relay switching circuit is used to be connected to the board under test.

[0014] Further, the signal acquisition circuit includes a digital quantity acquisition circuit;

[0015] The digital quantity acquisition circuit includes a first acquisition circuit and a second acquisition circuit;

[0016] The first acquisition circuit includes a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, and an opto-isolator;

[0017] One end of the resistor R11, one end of the resistor R13, one end of the resistor R15, and one end of the resistor R17 are all connected to the main control board;

[0018] The other end of the resistor R11 is connected to the first pin of the opto-isolator, the other end of the resistor R13 is connected to the third pin of the opto-isolator, the other end of the resistor R15 is connected to the fifth pin of the opto-isolator, and the other end of the resistor R17 is connected to the seventh pin of the opto-isolator;

[0019] The second pin, the fourth pin, the sixth pin, and the eighth pin of the opto-isolator are all grounded;

[0020] The tenth pin, the twelfth pin, the fourteenth pin, and the sixteenth pin of the opto-isolator are all at 3.3V voltage;

[0021] One end of the R12 resistor is connected to the fifteenth pin of the optocoupler isolator, one end of the R14 resistor is connected to the thirteenth pin of the optocoupler isolator, one end of the R16 resistor is connected to the eleventh pin of the optocoupler isolator, and one end of the R18 resistor is connected to the ninth pin of the optocoupler isolator;

[0022] The other ends of the R12 resistor, the R14 resistor, the R16 resistor, and the R18 resistor are all grounded;

[0023] The circuit structures of the first acquisition circuit and the second acquisition circuit are the same.

[0024] Further, the signal conditioning circuit includes: a first differential isolation module, a second differential isolation module, a first filtering module, a second filtering module, a third filtering module, a first optocoupler isolation module, a second optocoupler isolation module, a first shaping module, and a positive and negative shaping module;

[0025] The input end of the first differential isolation module is connected to the output end of the signal acquisition circuit, the output end of the first differential isolation module is connected to the input end of the first filtering module, and the output end of the first filtering module is connected to the input end of the AD conversion circuit;

[0026] The input end of the second differential isolation module is used to be connected to the first output end of the board under test, the output end of the second differential isolation module is connected to the input end of the second filtering module, the output end of the second filtering module is connected to the input end of the first shaping module, and the output end of the first shaping module is connected to the main control board;

[0027] The input end of the third filtering module is used to be connected to the second output end of the board under test, the output end of the third filtering module is connected to the input end of the first optocoupler isolation module, and the output end of the first optocoupler isolation module is connected to the main control board;

[0028] The input end of the second optocoupler isolation module is connected to the main control board, the output end of the second optocoupler isolation is connected to the input end of the positive and negative shaping module, and the output end of the positive and negative shaping module is used to be connected to the input end of the board under test.

[0029] Further, the first differential isolation module includes a first digital-to-analog converter, a first operational amplifier, a first differential amplifier, and a first capacitor;

[0030] The first pin of the first digital-to-analog converter is connected to the first signal end of the board under test, the second pin is grounded, and the third pin is connected to the input end of the first capacitor and the positive input end of the first operational amplifier;

[0031] The output end of the first capacitor is grounded;

[0032] The output terminal of the first operational amplifier is connected to the negative input terminal of the first operation, and the output terminal of the first operational amplifier is also connected to the positive input terminal of the first differential amplifier;

[0033] The first reference input terminal, the second reference input terminal and the negative input terminal of the first operational amplifier are all grounded. The negative power supply terminal of the first operational amplifier is connected to a -15V voltage, and the positive power supply terminal of the first operational amplifier is connected to a +15V voltage;

[0034] The voltage output terminal of the first operational amplifier is connected to the input terminal of the first filtering module.

[0035] Further, the positive and negative shaping module includes a first NPN transistor, a second NPN transistor, a third NPN transistor and a fourth NPN transistor;

[0036] The base of the first NPN transistor is connected to the first output terminal of the second opto-isolation. The collector of the first NPN transistor is connected to the +15V power supply, and the emitter of the first NPN transistor is connected to the emitter of the second NPN transistor;

[0037] The base of the second NPN transistor is connected to the first output terminal of the second opto-isolation. The collector of the second NPN transistor is connected to the -15V power supply;

[0038] The base of the third NPN transistor is connected to the second output terminal of the second opto-isolation. The collector of the third NPN transistor is connected to the +15V power supply, and the emitter of the third NPN transistor is connected to the emitter of the fourth NPN transistor;

[0039] The base of the fourth NPN transistor is connected to the second output terminal of the second opto-isolation. The collector of the fourth NPN transistor is connected to the -15V power supply.

[0040] Further, the first digital-to-analog converter is an ADA4522 chip. Both the first opto-isolation module and the second opto-isolation module include ACPL-247-500E opto-couplers; the shaping module includes an SN74HC14D inverter.

[0041] Further, the signal processing board further includes a first drive circuit and a second drive circuit;

[0042] The input terminal of the first drive circuit is connected to the main control board, and the output terminal of the first drive circuit is connected to the input terminal of the second opto-isolation module;

[0043] The input terminal of the second drive circuit is connected to the main control board, and the output terminal of the second drive circuit is connected to the input terminal of the relay switching circuit.

[0044] Further, the signal processing board further includes an analog switch circuit;

[0045] The input end of the analog switch circuit is connected to the output end of the first differential isolation module, and the output end of the analog switch circuit is connected to the input end of the first filtering module.

[0046] Further, the AD conversion circuit includes an AD7606 chip; the analog switch circuit includes an ADG1409 chip; both the first driving circuit and the second driving circuit include a ULN2003A chip.

[0047] Further, the touch panel includes a micro control unit, a display screen and a touch screen;

[0048] Both the display screen and the touch screen are connected to the micro control unit;

[0049] The micro control unit is communicatively connected to the main control board.

[0050] Further, the peripheral input device includes a keyboard; the peripheral input device can achieve the same input effect as the touch panel and corresponds to each touch button of the touch screen.

[0051] The utility model has the following advantages:

[0052] (1) The main control board of the utility model has a high integration level, powerful functions and a small volume, and the manufacturing cost can be reduced by 60%;

[0053] (2) The touch screen buttons of the utility model are enlarged, and any value can be directly input into the input box. At the same time, the peripheral input device can achieve the same input effect and corresponds to each touch button of the touch screen, achieving two sets of operation modes with the touch screen and the peripheral input device being backup to each other, while also keeping the operation simple.

[0054] Through the above invention, the cost can be reduced by 60%, the weight and volume of the device can be greatly reduced, the portability, reliability of the device can be improved, the operation can be simplified, and the task can be completed quickly, etc. Description of the Drawings

[0055] Figure 1 is a schematic structural diagram of the utility model;

[0056] Figure 2 is a schematic circuit diagram of the signal acquisition circuit;

[0057] Figure 3 is a schematic structural diagram of the specific implementation of the utility model;

[0058] Figure 4 is a schematic circuit diagram of the first differential isolation module;

[0059] Figure 5Schematic diagram of the positive and negative shaping module;

[0060] Figure 6 Partial schematic diagram of signal conditioning. Specific implementation mode

[0061] The following further describes the present utility model in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following description.

[0062] It should be noted that the orientation or positional relationship indicated by "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invention product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0063] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments can be combined with each other.

[0064] As Figures 1 to 6 shown, the inlet duct ramp adjustment system checker proposed in this embodiment includes a chassis and a peripheral input device. A socket interface is provided on the chassis. A main control board, a touch panel, a signal processing board, and a power supply are provided inside the chassis. The main control board is respectively signal-connected to the touch panel, the signal processing board, and the peripheral input device. The signal processing board is also signal-connected to the socket interface;

[0065] The peripheral input device is connected to the main control board; the socket interface is circuit-connected to the signal processing board; the first output terminal of the power supply is connected to the power supply input terminal of the main control board, the second output terminal of the power supply is connected to the power supply input terminal of the touch panel, and the third output terminal of the power supply is connected to the power supply input terminal of the signal processing board;

[0066] During operation, the peripheral input device can be a keyboard. Insert the signal connection line into the socket interface and turn on the power supply to start power supply. Temperature information can be input on the keyboard or on the touch panel. The keyboard sends commands to the main control board through the IO interface, and the touch panel sends commands to the main control board through serial communication. After receiving the temperature information, the main control board sends corresponding signals to the signal processing board. The signal processing board transmits the signals to the board under test through the signal line connected to the socket interface. After receiving the signals, the board under test returns corresponding analog signals and discrete signals to the signal processing board through the signal line connected to the socket interface. The signal processing board processes the signals and returns the processed signals to the main control board. After the main control board processes and analyzes the relevant signals, it transmits the signals to the touch panel for display through the serial port.

[0067] The signal processing board includes a signal acquisition circuit, a signal conditioning circuit, a signal interface circuit, an AD conversion circuit, and a relay switching circuit;

[0068] The input end of the signal acquisition circuit is used to connect to the first signal end of the board under test, and the output end of the signal acquisition circuit is connected to the first signal end of the signal conditioning circuit; the first communication end of the signal conditioning circuit is used to connect to the first communication end of the board under test, the second communication end of the signal conditioning circuit is connected to the main control board, the output end of the signal conditioning circuit is connected to the input end of the AD conversion circuit, and the output end of the AD conversion circuit is connected to the main control board; the input end of the relay switching circuit is connected to the main control board, and the output end of the relay switching circuit is used to connect to the board under test;

[0069] Specifically, the signal acquisition circuit is used to acquire multiple DC voltage signals, DC current signals, switch quantity signals, and rotational speed signals of the board under test; the signal conditioning circuit is used to perform isolation and filtering processing on the input signals; the signal interface circuit is used to acquire the analog quantity signals and discrete quantity signals output by the tester; the AD conversion circuit is used to convert the analog quantity signals acquired by the signal interface circuit into digital quantity signals; the relay switching circuit: is used to implement the channel selection and switching of the left and right input and output of the signals; thus, this signal processing board can complete signal acquisition and signal processing.

[0070] Refer to Figure 2 and the signal acquisition circuit includes a switch quantity acquisition circuit; the switch quantity acquisition circuit includes a first acquisition circuit and a second acquisition circuit;

[0071] The first acquisition circuit includes resistors R11, R12, R13, R14, R15, R16, R17, R18 and an optocoupler isolator; one ends of resistors R11, R13, R15 and R17 are all connected to the main control board; the other end of resistor R11 is connected to the first pin of the optocoupler isolator, the other end of resistor R13 is connected to the third pin of the optocoupler isolator, the other end of resistor R15 is connected to the fifth pin of the optocoupler isolator, and the other end of resistor R17 is connected to the seventh pin of the optocoupler isolator; the second, fourth, sixth and eighth pins of the optocoupler isolator are all grounded; the tenth, twelfth, fourteenth and sixteenth pins of the optocoupler isolator are all at a voltage of 3.3V; one end of resistor R12 is connected to the fifteenth pin of the optocoupler isolator, one end of resistor R14 is connected to the thirteenth pin of the optocoupler isolator, one end of resistor R16 is connected to the eleventh pin of the optocoupler isolator, and one end of resistor R18 is connected to the ninth pin of the optocoupler isolator; the other ends of resistors R12, R14, R16 and R18 are all grounded; the circuit structures of the first acquisition circuit and the second acquisition circuit are the same. The first acquisition circuit and the second acquisition circuit use an ACPL-247 optocoupler for isolation, directly convert the digital quantity into the IO level of the main control board, and are directly acquired by the main control board to realize the detection of the digital quantity input.

[0072] Refer to Figure 3 , the signal conditioning circuit includes a first differential isolation module, a second differential isolation module, a first filtering module, a second filtering module, a third filtering module, a first optocoupler isolation module, a second optocoupler isolation module, a first shaping module and a positive and negative shaping module;

[0073] The input end of the first differential isolation module is connected to the output end of the signal acquisition circuit, the output end of the first differential isolation module is connected to the input end of the first filtering module, and the output end of the first filtering module is connected to the input end of the AD conversion circuit;

[0074] The input end of the second differential isolation module is used to be connected to the first output end of the board under test, the output end of the second differential isolation module is connected to the input end of the second filtering module, the output end of the second filtering module is connected to the input end of the first shaping module, and the output end of the first shaping module is connected to the main control board;

[0075] The input end of the third filtering module is used to be connected to the second output end of the board under test, the output end of the third filtering module is connected to the input end of the first optocoupler isolation module, and the output end of the first optocoupler isolation module is connected to the main control board;

[0076] The input end of the second optocoupler isolation module is connected to the main control board, the output end of the optocoupler isolation is connected to the input end of the positive and negative shaping module, and the output end of the positive and negative shaping module is connected to the input end of the board under test.

[0077] Specifically, the first differential isolation module is used to process analog signals (multiple DC voltage signals), eliminate interference signals in the circuit, and output stable and clean analog signals to the filtering module for subsequent processing;

[0078] The second differential isolation module is used to process digital signals (speed signal processing) and effectively suppress interference signals;

[0079] The first filtering module is used to process the input analog signals and eliminate the noise in the signals;

[0080] The second filtering module is used to process the input discrete signals, remove the noise in the signals, and improve the signal-to-noise ratio;

[0081] The third filtering module is used to process the input discrete signals (switching signals), remove the noise in the signals, and improve the signal-to-noise ratio;

[0082] The first optocoupler isolation module is used to isolate the filtering module and the main control board, so that they have no direct electrical connection, realize the conversion of levels and eliminate the electrical noise in the signals;

[0083] The second optocoupler isolation module is used to realize the conversion of levels, converting 3.3V output from the main control board IO to 5V;

[0084] Both the first optocoupler isolation module and the second optocoupler isolation module include ACPL-247-500E optoelectronic couplers;

[0085] The first shaping module, whose working principle is mainly to amplify the input discrete signals so that the output signals meet specific requirements; the first shaping module includes SN74HC14D inverters;

[0086] The positive and negative shaping module, the positive and negative shaping circuit is a special shaping circuit, which only retains the positive or negative half cycle of the input signal and shapes the other half cycle of the signal to zero; the positive and negative shaping circuit discriminates the amplitude of the input signal, and according to the set threshold, discriminates the signal whose amplitude exceeds or is lower than the threshold as the corresponding positive or negative signal; the positive and negative shaping circuit shapes the discriminated positive or negative signal and outputs the shaped discrete signal that meets the requirements;

[0087] Specifically, refer to Figure 5, the positive and negative shaping module includes a first NPN transistor, a second NPN transistor, a third NPN transistor, and a fourth NPN transistor; the base of the first NPN transistor is connected to the first output terminal of the second opto-isolation, the collector of the first NPN transistor is connected to the +15V power supply, and the emitter of the first NPN transistor is connected to the emitter of the second NPN transistor; the base of the second NPN transistor is connected to the first output terminal of the second opto-isolation, and the collector of the second NPN transistor is connected to the -15V power supply; the base of the third NPN transistor is connected to the second output terminal of the second opto-isolation, the collector of the third NPN transistor is connected to the +15V power supply, and the emitter of the third NPN transistor is connected to the emitter of the fourth NPN transistor; the base of the fourth NPN transistor is connected to the second output terminal of the second opto-isolation, and the collector of the fourth NPN transistor is connected to the -15V power supply.

[0088] Refer to Figure 4 , the first differential isolation module includes a first digital-to-analog converter, a first operational amplifier, a first differential amplifier, and a first capacitor; the first pin of the first digital-to-analog converter is connected to the first signal terminal of the measured board, the second pin is grounded, the third pin is connected to the input terminal of the first capacitor and the positive input terminal of the first operational amplifier; the output terminal of the first capacitor is grounded; the output terminal of the first operational amplifier is connected to the negative input terminal of the first operational amplifier, and the output terminal of the first operational amplifier is also connected to the positive input terminal of the first differential amplifier; the first reference input terminal, the second reference input terminal, and the negative input terminal of the first operational amplifier are all grounded, the negative power supply terminal of the first operational amplifier is connected to -15V voltage, and the positive power supply terminal of the first operational amplifier is connected to +15V voltage; the voltage output terminal of the first operational amplifier is connected to the input terminal of the first filtering module.

[0089] The first differential isolation module is directly connected to the output of the measured board. To ensure the accuracy of the signal, the front-end voltage is processed in a differential manner; after the front-end voltage is transmitted through the cable, it may be interfered. A low-pass filter is made near the components. To match the impedance, a follower is added after filtering to achieve high-precision acquisition.

[0090] Refer to Figure 2 and Figure 6 , the signal processing board further includes a first drive circuit and a second drive circuit; the input terminal of the first drive circuit is connected to the main control board, and the output terminal of the first drive circuit is connected to the input terminal of the second opto-isolation module;

[0091] The input terminal of the second drive circuit is connected to the main control board, and the output terminal of the second drive circuit is connected to the input terminal of the relay switching circuit;

[0092] The drive circuit is mainly used to amplify the signals output by the main control board to drive the power transistor and achieve the function of switching power amplification. In addition, the drive circuit can also improve the efficiency and stability of the system and reduce energy consumption.

[0093] The signal processing board further includes an analog switch circuit; the input end of the analog switch circuit is connected to the output end of the first differential isolation module, and the output end of the analog switch circuit is connected to the input end of the first filtering module.

[0094] In this embodiment, a 4:1 analog switch circuit is mainly used, which is an analog switch circuit with 4 input ports and 1 output port; the 4 input ports can be simultaneously connected to 4 different analog signals, and the output port can simultaneously output 1 analog signal. When the output port of the 4:1 analog switch circuit needs to output a specific analog signal, it can be achieved by controlling the on / off of the switch.

[0095] The touch panel includes a micro control unit, a display screen, and a touch screen; both the display screen and the touch screen are circuit-connected to the micro control unit; the micro control unit is communicatively connected to the main control board;

[0096] During operation, a corresponding operation interface will be displayed on the touch panel, and the operation buttons are used for manual control and adjustment of the inlet ramp; the signal information returned by the main control board will be displayed on the display screen, mainly showing the status and performance information of the measured board of the inlet ramp.

[0097] The above embodiments only represent relatively preferred implementation manners, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. An air intake slant plate adjustment system inspection instrument, comprising a chassis and an external input device, wherein the chassis is provided with a socket interface, wherein a main control board, a touch panel, a signal processing board and a power supply are arranged in the chassis, wherein the main control board is respectively connected to the touch panel, the signal processing board and the external input device by signals, and the signal processing board is also connected to the socket interface by signals; The main control board is connected to the touch panel for communication; the main control board is connected to the signal processing board circuit; the peripheral input device is connected to the main control board; the socket interface is connected to the signal processing board; The first output end of the power supply is connected to the power supply input end of the main control board, the second output end of the power supply is connected to the power supply input end of the touch panel, and the third output end of the power supply is connected to the power supply input end of the signal processing board.

2. The air intake slant plate adjustment system inspection instrument according to claim 1, characterized in that: The signal processing board includes a signal acquisition circuit, a signal conditioning circuit, a signal interface circuit, an AD conversion circuit and a relay switching circuit; The input end of the signal acquisition circuit is used to connect to the first signal end of the board under test, and the output end of the signal acquisition circuit is connected to the first signal end of the signal conditioning circuit; The first communication end of the signal conditioning circuit is used to connect to the first communication end of the board under test, the second communication end of the signal conditioning circuit is connected to the main control board, the output end of the signal conditioning circuit is connected to the input end of the AD conversion circuit, and the output end of the AD conversion circuit is connected to the main control board; The input end of the relay switching circuit is connected to the main control board, and the output end of the relay switching circuit is used to connect to the board under test.

3. The air intake slant plate adjustment system inspection instrument according to claim 2, characterized in that: The signal acquisition circuit includes a switch quantity acquisition circuit; The switch quantity acquisition circuit includes a first acquisition circuit and a second acquisition circuit; The first acquisition circuit includes a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18 and an optocoupler isolator; One end of the R11 resistor, one end of the R13 resistor, one end of the R15 resistor and one end of the R17 resistor are all connected to the main control board; The other end of the R11 resistor is connected to the first pin of the optocoupler isolator, the other end of the R13 resistor is connected to the third pin of the optocoupler isolator, the other end of the R15 resistor is connected to the fifth pin of the optocoupler isolator, and the other end of the R17 resistor is connected to the seventh pin of the optocoupler isolator; The second pin, the fourth pin, the sixth pin and the eighth pin of the optical coupler isolator are all grounded; The tenth pin, the twelfth pin, the fourteenth pin and the sixteenth pin of the optical coupler isolator are all at 3.3V; One end of the R12 resistor is connected to the fifteenth pin of the optocoupler isolator, one end of the R14 resistor is connected to the thirteenth pin of the optocoupler isolator, one end of the R16 resistor is connected to the eleventh pin of the optocoupler isolator, and one end of the R18 resistor is connected to the ninth pin of the optocoupler isolator; The other end of the resistor R12, the other end of the resistor R14, the other end of the resistor R16, and the other end of the resistor R18 are all grounded; The first acquisition circuit and the second acquisition circuit have the same circuit structure.

4. The air intake slant plate adjustment system inspection instrument according to claim 2, characterized in that: The signal conditioning circuit includes: a first differential isolation module, a second differential isolation module, a first filtering module, a second filtering module, a third filtering module, a first optical coupling isolation module, a second optical coupling isolation module, a first shaping module and a positive and negative shaping module; The input end of the first differential isolation module is connected to the output end of the signal acquisition circuit, the output end of the first differential isolation module is connected to the input end of the first filtering module, and the output end of the first filtering module is connected to the input end of the AD conversion circuit; The input end of the second differential isolation module is used to connect to the first output end of the board under test, the output end of the second differential isolation module is connected to the input end of the second filtering module, the output end of the second filtering module is connected to the input end of the first shaping module, and the output end of the first shaping module is connected to the main control board; The input end of the third filter module is used to be connected to the second output end of the board under test, the output end of the third filter module is connected to the input end of the first optical coupling isolation module, and the output end of the first optical coupling isolation module is connected to the main control board; The input end of the second optical coupler isolation module is connected to the main control board, the output end of the second optical coupler isolation is connected to the input end of the positive and negative shaping module, and the output end of the positive and negative shaping module is used to connect to the input end of the board under test.

5. The air intake slant plate adjustment system inspection instrument according to claim 4, characterized in that: The first differential isolation module includes a first digital-to-analog converter, a first operational amplifier, a first differential amplifier and a first capacitor; The first pin of the first digital-to-analog converter is connected to the first signal terminal of the test board, the second pin is grounded, and the third pin is connected to the input terminal of the first capacitor and the positive input terminal of the first operational amplifier; The output end of the first capacitor is grounded; The output terminal of the first operational amplifier is connected to the negative input terminal of the first operational amplifier, and the output terminal of the first operational amplifier is also connected to the positive input terminal of the first differential amplifier; The first reference input terminal, the second reference input terminal and the negative input terminal of the first operational amplifier are all grounded, the negative power supply terminal of the first operational amplifier is connected to a negative 15V voltage, and the positive power supply terminal of the first operational amplifier is connected to a positive 15V voltage; The voltage output terminal of the first operational amplifier is connected to the input terminal of the first filtering module.

6. The air intake slant plate adjustment system inspection instrument according to claim 4, characterized in that: The positive and negative shaping module includes a first NPN transistor, a second NPN transistor, a third NPN transistor and a fourth NPN transistor; The base of the first NPN transistor is connected to the first output end of the second optical coupler isolation, the collector of the first NPN transistor is connected to the positive 15V power supply, and the emitter of the first NPN transistor is connected to the emitter of the second NPN transistor; The base of the second NPN transistor is connected to the first output terminal of the second optical coupler isolation, and the collector of the second NPN transistor is connected to a negative 15V power supply; The base of the third NPN transistor is connected to the second output end of the second optical coupler isolation, the collector of the third NPN transistor is connected to the positive 15V power supply, and the emitter of the third NPN transistor is connected to the emitter of the fourth NPN transistor; The base of the fourth NPN transistor is connected to the second output end of the second optical coupler isolation, and the collector of the fourth NPN transistor is connected to a negative 15V power supply.

7. The air intake slant plate adjustment system inspection instrument according to claim 5, characterized in that: The first digital-to-analog converter is an ADA4522 chip, the first optocoupler isolation module and the second optocoupler isolation module both include ACPL-247-500E photocouplers; and the first shaping module includes an SN74HC14D inverter.

8. The air intake slant plate adjustment system inspection instrument according to claim 3, characterized in that: The signal processing board also includes a first drive circuit and a second drive circuit; The input end of the first driving circuit is connected to the main control board, and the output end of the first driving circuit is connected to the input end of the second optical coupling isolation module; The input end of the second drive circuit is connected to the main control board, and the output end of the second drive circuit is connected to the input end of the relay switching circuit.

9. The air intake slant plate adjustment system inspection instrument according to claim 8, characterized in that: The signal processing board also includes an analog switch circuit; The input end of the analog switch circuit is connected to the output end of the first differential isolation module, and the output end of the analog switch circuit is connected to the input end of the first filtering module.

10. The inlet slant plate adjustment system inspection instrument according to claim 9, characterized in that: The AD conversion circuit includes an AD7606 chip; the analog switch circuit includes an ADG1409 chip; and the first drive circuit and the second drive circuit both include a ULN2003A chip.

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