CN115248052B - Self-checking system of automatic testing device of airborne VHF navigation system receiver - Google Patents

Abstract

The invention discloses a self-checking system of an automatic testing device of an airborne VHF navigation system receiver. The system comprises four test circuits and a control circuit, wherein the four test circuits comprise a test circuit for carrying out self-detection on an ARINC429 card and an industrial personal computer serial port RS 232-1 of an automatic test device of an airborne very high frequency navigation system receiver, a test circuit for carrying out self-detection on a 3802 switch card of the automatic test device of the airborne very high frequency navigation system receiver, a test circuit for carrying out self-detection on a 3801 switch card of the automatic test device of the airborne very high frequency navigation system receiver, and a test circuit for carrying out self-detection on a 3803 switch card of the automatic test device of the airborne very high frequency navigation system receiver and a power supply; and is connected with an iCon1 connector on a resource interface box of the automatic test device through a VPC connector. The automatic testing device is rapidly self-checked, faults are positioned to the board card level, and maintainability is enhanced.

Description

A self-inspection system of an automatic test device for an airborne VHF navigation system receiver

technical field

The invention relates to an airborne VHF navigation system testing technology, in particular to a self-inspection system of an automatic test device for an airborne VHF navigation system receiver.

Background technique

The automatic test device for the receiver of the airborne VHF navigation system (application number 2022102035211) can automatically test the receiver of the airborne VHF navigation system, but because there are multiple circuit boards installed inside it, especially the 3801 switch Cards, 3802 switch cards, and 3803 switch cards are very prone to failure after long-term use. If the circuit board is removed and the fault inspection is performed, it will not only consume a lot of time, but also may damage the device. There is no mature solution at present.

Contents of the invention

The purpose of the present invention is to perform rapid self-inspection for the invention patent "An Automatic Test Device for Airborne VHF Navigation System Receiver" with the application number of 2022102035211. When "An Automatic Test Device for Airborne VHF Navigation System Receiver" "When there is a fault, the self-inspection system can quickly locate the fault to the board level.

The technical scheme adopted by the present invention to achieve the above object is: a self-test system of an automatic test device for an airborne VHF navigation system receiver includes four test circuits and a control circuit, and the four test circuits: one is for all The ARINC429 card of the airborne very high frequency navigation system receiver automatic test device and the test circuit of the industrial computer serial port RS232_1 carry out self-inspection; The test circuit for self-inspection; the third is the test circuit for self-inspection of the 3801 switch card of the automatic test device for the receiver of the airborne VHF navigation system; the fourth is for the automatic test of the receiver of the airborne VHF navigation system The 3803 switch card of the device and the test circuit for self-checking of the power supply; the four test circuits are connected to the iCon1 connector on the resource interface box of the airborne VHF navigation system receiver automatic test device through the VPC connector; The VPC connector has a total of 168 pins, and the 168 pins are divided into two areas, P1A and P1B, each area consists of 6 columns, 14 rows in each column, and a total of 84 pins, of which 6 in the P1A area The columns are: P1A-A column, P1A-B column, P1A-C column, P1A-D column, P1A-E column, P1A-F column; the 6 columns in the P1B area are: P1B-A column, P1B- Column B, Column P1B-C, Column P1B-D, Column P1B-E, Column P1B-F.

The control circuit is connected to the 3803 switch card and the test circuit for self-testing of the power supply of the airborne VHF navigation system receiver automatic test device through the connector J1.

The self-inspection system also includes a self-inspection system program for the digital multimeter and the aviation signal source of the airborne VHF navigation system receiver automatic test device, and the self-inspection system program is compiled into a DLL file and copied to the The test program installation folder of the airborne VHF navigation system receiver automatic test device, load the self-inspection system program in the test program of the airborne VHF navigation system receiver automatic test device, and the digital multi-purpose The meter and the aviation signal source have a built-in self-test function, and the self-test system program sends a self-test test command to the digital multimeter and the aviation signal source respectively, and receives the returned self-test test result, and then communicates with the four test circuits The test results of the test items are output together.

The advantages of the present invention are as follows:

1. Make use of the power supply and digital multimeter in the receiver automatic test device of the airborne VHF navigation system as much as possible to reduce costs.

2. The connector of this system is in the same specification as the iCon1 connector on the resource interface box in the receiver automatic test device of the airborne VHF navigation system. Connect the system to the iCon1 connector to receive the airborne VHF navigation system The self-test can be performed by the automatic test device of the airborne VHF navigation system without removing the circuit board or components in the automatic test device of the receiver of the airborne VHF navigation system.

3. Realize the rapid self-inspection of the automatic test device of the receiver of the airborne VHF navigation system, and locate the fault to the board level, which can reduce the fault location time of the automatic test device of the receiver of the airborne VHF navigation system and enhance maintainability.

Description of drawings

Fig. 1 is the block diagram of connection principle of the present invention;

Fig. 2 is ARINC429 card test in Fig. 1, industrial computer serial port RS232_1 test circuit diagram;

Fig. 3 is 3802 switch card test circuit diagrams in Fig. 1;

Fig. 4 is the test circuit diagram of 3801 switch card in Fig. 1;

Fig. 5 is a 3803 switch card and a power supply test circuit diagram in Fig. 1;

Fig. 6 is a schematic diagram of the control circuit in Fig. 1;

Fig. 7 is the operation flowchart of the present invention;

Figure 8 is a schematic diagram of the basic structure of the 3803 switch card.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

As shown in Figure 1, this system includes four test circuits and control circuits, four test circuits: one is to perform self-test for the ARINC429 card of the automatic test device for the receiver of the airborne VHF navigation system and the serial port RS232_1 of the industrial computer The test circuit; the second is the test circuit for self-checking of the 3802 switch card of the automatic test device for the receiver of the airborne VHF navigation system; The test circuit for self-inspection; the fourth is the test circuit for self-inspection of the 3803 switch card and power supply of the receiver automatic test device of the airborne VHF navigation system; the four test circuits are connected to the airborne VHF navigation system through the VPC connector The iCon1 connector on the resource interface box of the receiver automatic test device is connected; the VPC connector has a total of 168 pins, and the 168 pins are divided into two areas, P1A and P1B, each area consists of 6 columns and 14 rows in each column , a total of 84 pins, of which the 6 columns in the P1A area are: P1A-A column, P1A-B column, P1A-C column, P1A-D column, P1A-E column, P1A-F column; P1B area The 6 columns are: P1B-A column, P1B-B column, P1B-C column, P1B-D column, P1B-E column, P1B-F column.

The control circuit of this system is connected with the 3803 switch card of the automatic test device of the receiver of the airborne VHF navigation system and the test circuit of the power supply for self-test through the connector J1.

This system also includes a digital multimeter for the automatic test device of the airborne VHF navigation system receiver, and a self-inspection system program for the aviation signal source. The self-inspection system program is compiled into a DLL file and copied to the airborne VHF navigation system. The test program installation folder of the receiver automatic test device, load the self-test system program in the test program of the receiver automatic test device of the airborne VHF navigation system, the digital multimeter and the aviation signal source have built-in self-test function, self-test system The program sends the self-test test command to the digital multimeter and the aviation signal source respectively, and receives the returned self-test test result, and then outputs it together with the test results of the four test circuit test items.

As shown in Figure 2, the connection relationship of the test circuit for self-testing of the ARINC429 card of the automatic test device for the receiver of the airborne VHF navigation system and the serial port RS232_1 of the industrial computer is: the connection between P1A-1A and P1A-2C of the VPC connector Used to test ARINC429-1#A signal; P1A-1B and P1A-2D of VPC connector are used to test ARINC429-1#B signal; P1A-1C and P1A-2E of VPC connector are connected to test ARINC429-2# A signal; P1A-1D and P1A-2F of VPC connector are used to test ARINC429-2#B signal; P1A-1E and P1A-3A of VPC connector are connected to test ARINC429-3#A signal; VPC connector P1A-1F and P1A-3B are connected to test ARINC429-3#B signal; P1A-2A and P1A-3C of VPC connector are connected to test ARINC429-4#A signal; P1A-2B and P1A of VPC connector The -3D connection is used to test the ARINC429-4#B signal; the P1A-3F and P1A-4F connections of the VPC connector are used to test the 1-channel signal of the serial port RS232 of the industrial computer.

ARINC429 card test, industrial computer serial port RS232_1 test principle and test process are described as follows:

There are four groups of ARINC429 cards, each group consists of two sending ports and two receiving ports, a total of eight sending ports and eight sending ports. During the test, the sending port and the receiving port are connected in pairs, and specific characters are sent through the sending port. If the same content is received at the corresponding receiving port, the test passes, otherwise the test fails.

The test principle and process of the serial port RS232_1 of the industrial computer are the same as that of the ARINC429 card.

As shown in Figure 3, the connection relationship of the test circuit for the self-test of the 3802 switch card of the automatic test device for the receiver of the airborne VHF navigation system is: P1A-5A, P1A-5B, P1A-5C, and P1A of the VPC connector -5D, P1A-5E, P1A-10A, P1A-10B, P1A-10C eight pins are connected in series with resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8 respectively, and then Commonly connected to P1A-10E pins of VPC connector; P1A-6A, P1A-7A, P1A-8A, P1A-9A, P1A-6B, P1A-7B, P1A-8B, P1A-9B, P1A of VPC connector -6C, P1A-7C, P1A-8C, P1A-9C, P1A-6D, P1A-7D, P1A-8D, P1A-9D, P1A-6E, P1A-7E, P1A-8E, P1A-9E, P1A-11A , P1A-12A, P1A-13A, P1A-14A, P1A-11B, P1A-12B, P1A-13B, P1A-14B, P1A-11C, P1A-12C, P1A-13C, P1A-14C thirty-two pins Commonly connected to the P1A-10F pins of the VPC connector.

The 3802 switch card test principle and test process are described as follows:

The 3801 switch card is composed of 8 groups of 4-to-1 switches, and each group of 4-to-1 switches consists of 4 switch channels and 1 ground channel. It is necessary to perform on-off tests for each channel in each group of switches in turn.

Path test: see Figure 3, connect a resistor with a resistance value of 1000 ohms in series in the grounding channel of each group of switches, turn on each switch in turn, and measure its resistance to ground. If the resistance to ground is 1000±15 ohms, the test is passed , otherwise the test fails.

Open circuit test: turn off each switch in turn, measure the voltage drop across the resistor, because the switch is off, if the voltage drop across the resistor is 0, the test is passed, otherwise the test is not passed.

As shown in Figure 4, the connection relationship of the test circuit for self-testing of the 3801 switch card of the automatic test device for the receiver of the airborne VHF navigation system is:

P1B-7A, P1B-7C, P1B-7E, P1B-8A, P1B-8C, P1B-8E, P1B-9A, P1B-9C, P1B-9E, P1B-10A, P1B-10C, P1B- 10E, P1B-11A, P1B-11C, P1B-11E, P1B-12A sixteen pins are connected in series with resistor R25, and then connected to the P1A-10E pins of the VPC connector; P1B-7B of the VPC connector , P1B-7D, P1B-7F, P1B-8B, P1B-8D, P1B-8F, P1B-9B, P1B-9D, P1B-9F, P1B-10B, P1B-10D, P1B-10F, P1B-11B, P1B The sixteen pins -11D, P1B-11F, and P1B-12B are commonly connected to the P1A-10F pins of the VPC connector.

The 3801 switch card test principle and test process are described as follows:

The 3801 switch card consists of 32 single-pole single-throw switches, and each switch needs to be tested for continuity in turn.

Path test: see Figure 4, connect a resistor R25 with a resistance value of 1000 ohms in series in the test circuit, turn on each switch in turn, and measure its resistance to ground. If the resistance to ground is 1000±15 ohms, the test is passed, otherwise The test fails.

Open circuit test: turn off each switch in turn, measure the voltage drop across the resistor R25, because the switch is off, if the voltage drop across the resistor R25 is 0, the test is passed, otherwise the test is not passed.

As shown in Figure 5, the 3803 switch card of the airborne VHF navigation system receiver automatic test device is connected to the test circuit for self-testing of the power supply. The connection relationship is: P1A-14D of the VPC connector is connected to 3 of the connector J1 P1A-14E is connected to pin 4 of connector J1; P1A-14D and P1A-14E of the VPC connector are respectively connected to two shielded pairs of pin 3 and pin 4 of connector J1 Twisted wire; P1B-1A of VPC connector is connected to P1B-14A and P1B-14B, P1B-1A is connected in series with resistor R9 and P1B-1B is connected to P1B-13A and P1B-13B; P1B-1C of VPC connector is connected To P1B-13D, P1B-1C of VPC connector is connected in series with resistor R10 and P1B-1D to P1B-14D; P1B-1E of VPC connector is connected to P1B-13F and pin 8 of connector J1, P1B -1E is connected in series with resistor R11 and P1B-1F is connected to P1B-12E; P1B-2A of VPC connector is connected to P1B-13E and pin 7 of connector J1, and P1B-2A is connected in series with resistor R12 and P1B- 2B is connected to P1B-12F; P1B-2C of VPC connector is connected to P1B-12D and pin 6 of connector J1, P1B-2C is connected in series with resistor R13 and P1B-2D is connected to P1B-14F and connector J1 Pin 5 of the VPC connector is connected to the shielding layer of two shielded twisted pairs; P1B-2E of the VPC connector is connected to P1A-13F and P1A-14F, and P1B-2E is connected in series with resistor R14 and P1B-2F is connected to P1B-14E; P1B-3A of VPC connector is connected to P1B-13C, P1B-3A is connected in series with resistor R15 and P1B-3B is connected to P1B-14C; P1B-3C of VPC connector is connected in series with resistor R16 to P1B -3D; P1B-3E of VPC connector is connected to P1B-3F in series with resistor R17; P1B-4A of VPC connector is connected to P1B-4B in series with resistor R18; P1B-4C of VPC connector is connected in series with resistor R19 Then connect to P1B-4D; P1B-4E of VPC connector is connected to P1B-4F in series with resistor R20; P1B-5A resistor R21 of VPC connector is connected in series to P1B-5B; P1B-5C of VPC connector is connected to Resistor R22 is connected in series to P1B-5D; P1B-5E of VPC connector is connected to P1B-5F in series with resistor R23; P1B-6A of VPC connector is connected to P1B-6B in series with resistor R24; P1B-6C and P1B-6E are connected to the P1A-10E pins of the VPC connector; P1B-6D and P1B-6F of the VPC connector are connected to the P of the VPC connector 1A-10F pins; P1B-12C of the VPC connector are grounded; pins 1 and 2 of the connector J1 are grounded.

3803 switch card and power supply test principle and test process are described as follows:

The 3803 switch card is a matrix switch, consisting of 16 rows from 1 to 16, and 2 columns from A to B. V, DC +15 V, DC -15 V, DC +5 V, DC +12 V, DC 24 V power supply, 8-15 lines are connected in series with resistors with a resistance value of 2000 ohms, and the 16 lines are connected to P1A respectively. -10E and P1A-10F, as shown in Figure 5.

Path test:

Lines 1-7: Connect 14 channels of A and B in lines 1-7 respectively, and measure the voltage at both ends. If the voltage value is equal to the reference value ±1%, the test is passed, otherwise the test is not passed;

Lines 8-15: Connect 16 channels of A and B in lines 8-15 respectively, and measure their resistance to ground. If the resistance to ground is 2000±20 ohms, the test is passed, otherwise the test is not passed;

Open circuit test:

Lines 1-7: Disconnect 14 channels of A and B in lines 1-7 respectively, and measure the voltage at both ends. If the voltage value is equal to 0, the test is passed, otherwise the test is not passed;

Lines 8-15: There are 16 channels in A and B in lines 8-15 in sequence. Measure the voltage drop across the resistor, because the switch is in an off state. If the voltage drop across the resistor is 0, the test is passed, otherwise the test is not passed. ;

Line 16 connects the two test terminals of the digital multimeter. If all the above tests pass, the test of this line passes; if more than one of the above tests fail, the test of this line fails.

Digital multimeter: The test program sends the self-test command "TST" through the GPIB interface of the digital multimeter, and the digital multimeter enters the self-test mode immediately, and returns the self-test result after the self-test is completed.

Aviation signal source: The test program sends the self-inspection command "COMMAND::" through the GPIB interface of the aviation signal source, and the aviation signal source enters the self-inspection mode immediately, and returns the self-inspection result after the self-inspection is completed.

As shown in Figure 6, the control circuit includes a C8051 control chip U1 and a LM1117 linear regulator U2, and the connection relationship is as follows:

The 7th pin of the control chip U1 is grounded; the 8th pin is connected to the cathode of the diode D2, the anode of the diode D2 is grounded, and the 8th pin is connected to the 3rd pin of the connector J1; the 9th pin Connect to the anode of diode D3, the cathode of diode D3 is grounded, and the 9th pin is connected to the 4th pin of the connector J1; the 10th pin is connected to the 11th pin, and the 10th pin is respectively connected to To the positive 3.3 volt DC positive pole, one end of capacitor C5, the positive pole of electrolytic capacitor C6, the other end of capacitor C5, and the negative pole of electrolytic capacitor C6 are respectively grounded; pin 12 is connected to the positive 5 volt DC positive pole;

The No. 3 pin of the linear regulator U2 is respectively connected to the positive pole of the electrolytic capacitor C2, the positive pole of the positive 5 volt DC, the positive pole of the light-emitting diode LED, and one end of the inductor L1, and the other end of the inductor L1 is respectively connected to the negative pole of the diode D1 and the electrolytic capacitor C1 The positive pole of the electrolytic capacitor C1 is connected to the No. 6 pin of the connector J1; the negative pole of the electrolytic capacitor C1 is connected to the No. 5 pin of the connector J1 and the positive pole of the diode D1 is grounded; the negative pole of the light-emitting diode LED is connected with the resistor R26 The negative pole of the electrolytic capacitor C2 is connected to the ground; the No. 2 pin of the linear voltage regulator U2 is respectively connected to the positive pole of the electrolytic capacitor C3 and one end of the capacitor C4; the No. 1 pin of the linear voltage regulator U2 is connected to the other end of the capacitor C4 , The negative electrode of the electrolytic capacitor C3 is connected to the ground.

This system loads the self-inspection program in the test software of the automatic test device of the receiver of the airborne VHF navigation system, and through the built-in C8051 control circuit of the system and the industrial computer in the automatic test device of the receiver of the airborne VHF navigation system Carry out communication, confirm whether the adapter currently connected to the iCon1 connector of the resource interface box of the test device is consistent with the selected test program, if consistent, continue the test program, and if not, terminate the test program.

A self-inspection system for the automatic test device of the receiver of the airborne VHF navigation system is developed. The power supply and the digital multimeter in the automatic test device of the receiver of the airborne VHF navigation system are used to perform self-test and judge whether there is a fault. If there is a fault, the name of the faulty circuit board and the fault type will be output.

As shown in Figure 7, the system operation process is as follows:

1. Turn on the power of the test device and start the test device;

2. Connect the plug of the self-test system to the iCon1 connector of the test device, and make sure the connection is in place;

3. Run the test program of the test device;

4. Load the self-test program in the test program;

5. Select the test board or component;

6. Click to start the test and wait for the test to complete;

7. View the test results and choose whether to print.

This system readjusts and matches the signals of circuit boards or components in the automatic test device of the receiver of the airborne VHF navigation system through the self-designed circuit, and uses the automatic test device of the receiver of the airborne VHF navigation system. The power supply and the digital multimeter test the electrical parameters such as the voltage, current, and resistance of the signal and judge the faulty circuit board or component, and finally output the test result.

Claims (6)

1. The utility model provides an airborne very high frequency navigation system receiver automatic testing arrangement's self-checking system which characterized in that, the self-checking system includes four test circuit and control circuit, four test circuit: the test circuit is used for carrying out self-test on an ARINC429 card and an industrial personal computer serial port RS232_1 of the automatic test device of the airborne VHF navigation system receiver; a test circuit for self-checking the 3802 switch card of the automatic test device of the airborne VHF navigation system receiver; thirdly, a test circuit for self-checking the 3801 switch card of the automatic test device of the airborne VHF navigation system receiver; fourthly, a test circuit for self-checking the 3803 switch card and the power supply of the automatic test device of the airborne VHF navigation system receiver; the four test circuits are connected with an iCon1 connector on a resource interface box of the automatic test device of the airborne VHF navigation system receiver through a VPC connector; the VPC connector has 168 pins, the 168 pins are divided into two regions of P1A and P1B, each region consists of 6 columns, 14 rows in each column and 84 pins, wherein 6 columns in the P1A region are respectively: columns P1A-A, P1A-B, P1A-C, P1A-D, P1A-E and P1A-F; the 6 columns in the P1B region are: P1B-A column, P1B-B column, P1B-C column, P1B-D column, P1B-E column, and P1B-F column; the control circuit is connected with a 3803 switch card of the automatic testing device of the airborne VHF navigation system receiver and a testing circuit for performing self-checking on a power supply through a connector J1;

the self-test system also comprises a digital multimeter of the automatic testing device of the airborne VHF navigation system receiver and a self-test system program of the aviation signal source, wherein the self-test system program is compiled into a DLL file and copied to a test program installation folder of the automatic testing device of the airborne VHF navigation system receiver, the self-test system program is loaded in the test program of the automatic testing device of the airborne VHF navigation system receiver, the digital multimeter and the aviation signal source are internally provided with self-test functions, the self-test system program respectively sends self-test commands to the digital multimeter and the aviation signal source, receives returned self-test results, and then outputs the test results together with the test results of the four test circuit test items.

2. The self-test system of the automatic testing device of the airborne VHF navigation system receiver according to claim 1, characterized in that the connection relationship of the test circuit for self-testing the ARINC429 card and the industrial personal computer serial RS232_1 of the automatic testing device of the airborne VHF navigation system receiver is as follows:

the P1A-1A and the P1A-2C of the VPC connector are connected for testing ARINC429-1#A signals;

the P1A-1B and the P1A-2D of the VPC connector are connected for testing ARINC429-1#B signals;

the P1A-1C and the P1A-2E of the VPC connector are connected for testing ARINC429-2#A signals;

the P1A-1D and the P1A-2F of the VPC connector are connected for testing ARINC429-2#B signals;

the P1A-1E and the P1A-3A of the VPC connector are connected for testing ARINC429-3#A signals;

the P1A-1F and the P1A-3B of the VPC connector are connected for testing ARINC429-3#B signals;

the P1A-2A and the P1A-3C of the VPC connector are connected for testing ARINC429-4#A signals;

the P1A-2B and the P1A-3D of the VPC connector are connected and used for testing ARINC429-4#B signals;

and P1A-3F and P1A-4F of the VPC connector are connected for testing a 1-channel signal of an industrial personal computer serial port RS 232.

3. The self-test system of the automatic testing device of the airborne VHF navigation system receiver according to claim 1, wherein the connection relationship of the test circuit for self-testing the 3802 switch card of the automatic testing device of the airborne VHF navigation system receiver is as follows:

eight pins P1A-5A, P A-5B, P A-5C, P A-5D, P A-5E, P A-10A, P1A-10B, P A-10C of the VPC connector are respectively connected in series with a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a resistor R8 and then are commonly connected to pins P1A-10E of the VPC connector;

P1A-6A, P A-7A, P A-8A, P A-9A, P A-6B, P A-7B, P A-8B, P A-9B, P A-6B, P1A-7B, P A-8B, P A-9B, P A-6B, P, B, P A-7B, P A-8 zxft 6258A-9 zxft 6258A-6B, P7B, P1A-8B, P A-9B, P1A-11B, P1A-12B, P A-13B, P1A-14B, P A-11B, P1A-12B, P A-13B, P A-14C are connected to the thirty-two pins of the VPC connector.

4. The self-test system of the automatic testing device of the airborne VHF navigation system receiver according to claim 1, wherein the connection relationship of the test circuit for self-testing the 3801 switch card of the automatic testing device of the airborne VHF navigation system receiver is as follows:

P1B-7A, P B-7C, P B-7E, P B-8A, P B-8C, P B-8E, P B-9A, P B-9C, P B-9E, P B-10A, P B-10B-C, P B-10E, P B-11A, P B-11C, P B-11E, P B-12A sixteen pins of the VPC connector are connected in series with a resistor R25 and then connected to P1A-10E pins of the VPC connector;

P1B-7B, P B-7D, P B-7F, P B-8B, P B-8D, P B-8F, P B-9B, P B-9D, P B-9F, P1B-10B, P B-10D, P B-10F, P B-11B, P B-11D, P B-11F, P B-12B sixteen pins of the VPC connector are commonly connected to P1A-10F pins of the VPC connector.

5. The self-test system of the automatic testing device of the airborne VHF navigation system receiver according to claim 1, wherein the 3803 switch card of the automatic testing device of the airborne VHF navigation system receiver is connected with a test circuit for self-test of the power supply, and the connection relationship is as follows:

P1A-14D of the VPC connector are connected to a No. 3 pin of the connector J1, and P1A-14E are connected to a No. 4 pin of the connector J1; P1A-14D, P A-14E of the VPC connector are respectively connected to two shielded twisted pairs of a No. 3 pin and a No. 4 pin of the connector J1;

P1B-1A of the VPC connector is connected to P1B-14A and P1B-14B, and P1B-1A is connected with a resistor R9 in series and P1B-1B is connected to P1B-13A and P1B-13B;

P1B-1C of the VPC connector is connected to P1B-13D, and P1B-1C and P1B-1D of the VPC connector are connected to P1B-14D after being connected with a resistor R10 in series;

P1B-1E of the VPC connector is connected to P1B-13F and a No. 8 pin of the connector J1, and P1B-1E and P1B-1F are connected to P1B-12E after being connected with a resistor R11 in series;

P1B-2A of the VPC connector is connected to P1B-13E and a No. 7 pin of the connector J1, and P1B-2A and P1B-2B are connected to P1B-12F after being connected with a resistor R12 in series;

P1B-2C of the VPC connector is connected to P1B-12D and a No. 6 pin of the connector J1, P1B-2C is connected with a resistor R13 in series and then connected with P1B-14F and a No. 5 pin of the connector J1 in series, and is connected with the shielding layers of the two shielding twisted pairs;

P1B-2E of the VPC connector is connected to P1A-13F and P1A-14F, P1B-2E is connected with a resistor R14 in series, and P1B-2F is connected to P1B-14E;

P1B-3A of the VPC connector is connected to P1B-13C, and P1B-3B are connected to P1B-14C after the P1B-3A is connected with a resistor R15 in series;

P1B-3C of the VPC connector is connected with a resistor R16 in series and then is connected to P1B-3D;

P1B-3E of the VPC connector is connected with a resistor R17 in series and then is connected to P1B-3F;

P1B-4A of the VPC connector is connected with a resistor R18 in series and then is connected to P1B-4B;

P1B-4C of the VPC connector is connected with a resistor R19 in series and then is connected to P1B-4D;

P1B-4E of the VPC connector is connected with a resistor R20 in series and then is connected to P1B-4F;

the P1B-5A resistor R21 of the VPC connector is connected in series and then is connected to the P1B-5B;

P1B-5C of the VPC connector is connected with a resistor R22 in series and then is connected to P1B-5D;

P1B-5E of the VPC connector is connected with a resistor R23 in series and then is connected to P1B-5F;

P1B-6A of the VPC connector is connected with a resistor R24 in series and then is connected to P1B-6B;

the P1B-6C and the P1B-6E of the VPC connector are connected to the P1A-10E pins of the VPC connector;

the P1B-6D and the P1B-6F of the VPC connector are connected to the P1A-10F pins of the VPC connector;

P1B-12C of the VPC connector is grounded; the pin 1 and the pin 2 of the connector J1 are grounded.

6. The self-test system of the automatic testing device of the airborne VHF navigation system receiver according to claim 1, wherein the control circuit comprises a control chip U1 with model number C8051 and a linear regulator U2 with model number LM1117, and the connection relationship is as follows:

the No. 7 pin of the control chip U1 is grounded; the No. 8 pin is connected to the cathode of the diode D2, the anode of the diode D2 is grounded, and meanwhile, the No. 8 pin is connected to the No. 3 pin of the connector J1; the No. 9 pin is connected to the anode of the diode D3, the cathode of the diode D3 is grounded, and meanwhile, the No. 9 pin is connected to the No. 4 pin of the connector J1; the No. 10 pin is connected with the No. 11 pin, meanwhile, the No. 10 pin is respectively connected to the positive electrode of positive 3.3V direct current, one end of a capacitor C5 and the positive electrode of an electrolytic capacitor C6, and the other end of the capacitor C5 and the negative electrode of the electrolytic capacitor C6 are respectively grounded; the No. 12 pin is connected to the positive electrode of the positive 5V direct current;

the No. 3 pin of the linear voltage stabilizer U2 is respectively connected with the anode of the electrolytic capacitor C2, the anode of the positive 5V direct current, the anode of the light emitting diode LED and one end of the inductor L1, and the other end of the inductor L1 is respectively connected with the cathode of the diode D1 and the anode of the electrolytic capacitor C1 and then is connected with the No. 6 pin of the connector J1; the cathode of the electrolytic capacitor C1 is connected to the No. 5 pin of the connector J1 and the anode of the diode D1 and then grounded; the cathode of the LED is connected with the cathode of the electrolytic capacitor C2 through the resistor R26 and then grounded; the No. 2 pin of the linear voltage stabilizer U2 is respectively connected with the anode of the electrolytic capacitor C3 and one end of the capacitor C4; and the No. 1 pin of the linear voltage stabilizer U2 is connected with the other end of the capacitor C4 and the negative electrode of the electrolytic capacitor C3 and then grounded.

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