Flight parameter collector testing device

Abstract

The utility model discloses a testing device for a flight parameter collector. The testing device comprises a testing box and a connecting socket. The test box is connected with a power supply module and an excitation source module of a tested flight parameter collector through the connection socket, and the tested numerical value of the collector module is visually displayed through the display module by operating the switch arranged on the panel of the test box, so that the test can be quickly and reliably completed, and the problems of time waste, poor contact, low debugging precision and low debugging efficiency during manual test are solved. And the quality of the board card is influenced.

Description

Technical Field

[0001] The utility model relates to the field of avionics equipment testing, in particular to a flight parameter collector testing device. Background Art

[0002] The flight parameter collector collects various data on the aircraft, and sends them to the recorder device for storage after packaging. It is an important onboard device on the aircraft. The power board and excitation source board in the collector provide stable working voltage for various acquisition boards, which is closely related to the accuracy of parameter collection. Therefore, it is necessary to test the power board and excitation source board.

[0003] The disadvantages of conventional detection methods: 1. Low test efficiency. According to the traditional power board and excitation source board test methods, a debugger with debugging experience needs about 30-40 minutes to complete a test. 2. Complex operation during testing and debugging. When testing the relay function of the traditional power board, it must be placed in the rack, and it is necessary to connect 3 3.3V control voltages on the printed circuit board or the 150-pin socket. The method of welding wires or plugging wires is cumbersome and inconvenient to operate. 3. The debugging accuracy is not high and affects the quality of the board. The traditional debugging method uses a resistor box or a sliding rheostat to adjust the frequency and voltage. The resistor box has low accuracy, and the resistor box is used as a load of 70Ω and 14Ω respectively, and the resistor box has insufficient power. In addition, the traditional test method requires secondary welding of the solder joints when welding and removing the wires, which has an adverse effect on the original solder joints. Summary of the invention

[0004] The utility model provides a flight parameter collector test device, which can solve the problems of low original test efficiency and low single board debugging accuracy.

[0005] The utility model provides a flight parameter collector test device, comprising: a test box 1; a board to be tested comprises: a power supply module to be tested and an excitation source module to be tested;

[0006] The test box 1 includes: a power switch S1, a voltage display meter T1, a knob selection switch K1, a load switch K2, a channel switch K3, a light-emitting diode L1, a light-emitting diode L2, a light-emitting diode L3, a first socket XP1, a second socket XP2, a first power conversion module U1, and a second power conversion module U2;

[0007] The tested power supply module and the tested excitation source module of the tested board are connected to the test box 1 through the first socket XP1 and the second socket XP2 respectively;

[0008] The DC power supply supplies power to the power module under test through the power switch S1 and the first socket XP1, and supplies power to the excitation source module under test through the power switch S1 and the second socket XP2;

[0009] The first power conversion module U1 is connected to the power module under test through the first socket XP1, receives power from the power module under test, and generates three conversion voltages to provide to the power module under test;

[0010] The knob selection switch K1 includes pins 1 to 9, wherein pin 1 is connected to the voltage test terminal of the voltage display meter T1, pins 2 to 5 are respectively connected to the 4-way constant voltage source output of the power module under test, pin 6 is connected to the PDOWN output of the power module under test, and pins 7 to 9 are respectively connected to the 3-way constant voltage source output of the first power conversion module U1;

[0011] The second power conversion module U2 is connected to the 5V constant voltage source output of the power module under test, and is used to convert the 5V constant voltage source into a 3.3V constant voltage source; the first end of the channel switch K3 is connected to the second power conversion module U2, and the second end is connected to the control loop of the three relays in the power module under test. When the channel switch K3 is closed, the control loop generates magnetic force to attract the relay;

[0012] The first ends of the light emitting diode L1, the light emitting diode L2 and the light emitting diode L3 are respectively connected to the 3.3V constant voltage source output end of the power module under test through a voltage dividing resistor, and the second ends are respectively connected to the relay circuits of the three relays on the power module under test;

[0013] The fixed end of the load switch K2 is connected to the first load end of the excitation source module under test, the two selection ends of the load switch K2 are respectively connected to the first end of a load resistor with different resistance values, and the second ends of the two load resistors are connected to the second load end of the excitation source module under test;

[0014] Voltage test holes are provided at the first load end and the second load end of the excitation source module to be tested.

[0015] Optionally, the first power conversion module U1 is also connected to the voltage display meter T1 to supply power to the voltage display meter T1.

[0016] Optionally, a positive terminal of a voltage test hole is also provided at pin 1 of the knob selection switch K1, and a negative terminal of a voltage test hole is also provided at the ground terminal of the voltage display meter T1.

[0017] Optionally, the power input terminal of the second power conversion module U2 is also grounded through the first capacitor C1; the power output terminal is also grounded through the second capacitor C2.

[0018] Optionally, the resistance values ​​of the two load resistors are 15Ω and 70Ω respectively.

[0019] Optionally, the test box 1 further comprises: a light emitting diode L4 and a switch K4;

[0020] The negative terminal of the light emitting diode L4 is grounded, the green terminal is connected to A21 of the first socket XP1, and the red terminal is connected to B21 of the first socket XP1;

[0021] A first end of the switch K4 is connected to a fault control light signal input pin of the six-inverter chip of the power board to be tested, and a second end of the switch K4 is grounded;

[0022] When the switch K4 is disconnected, the light emitting diode L4 outputs green light, and when the switch K4 is connected, the light emitting diode L4 outputs red light.

[0023] The utility model provides a flight parameter collector power module and excitation source module test device, which includes a test box and a connection socket. The test box is connected to the flight parameter collector power module and the excitation source module to be tested through the connection socket, and the measured value of the collector module is intuitively displayed through the display module by operating the switch set on the test box panel, so that the test can be completed quickly and reliably, the complexity of single board testing is reduced, and cumbersome procedures are reduced, and frequent welding of wires and resistors on the single board during debugging is avoided, so as to improve the test and debugging efficiency, improve the accuracy, improve the product quality, and solve the problems of time-consuming, poor contact, low debugging accuracy, and affecting the quality of the board when relying on manual testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 This is a connection diagram of the flight parameter collector test device of the utility model;

[0026] Figure 2 This is a schematic diagram of the test box panel of the utility model;

[0027] Figure 3 This is the electrical connection schematic diagram of the utility model;

[0028] Description of reference numerals:

[0029] 1- Test kit;

[0030] 2-Connect the socket;

[0031] 3- Power supply cable. DETAILED DESCRIPTION

[0032] The utility model is further introduced below in conjunction with the accompanying drawings. The utility model provides a flight parameter collector power module and an excitation source module test device, such as Figure 1 As shown, it includes: a test box 1.

[0033] like Figure 2 As shown, the test box 1 includes: a power switch S1, a voltage display meter T1, a test hole TP1, a test hole TP2, a knob selection switch K1, a load switch K2, a channel switch K3, a switching switch K4, a light-emitting diode L1, a light-emitting diode L2, a light-emitting diode L3, a light-emitting diode L4, a connecting socket 2, a first power conversion module U1, and a second power conversion module U2.

[0034] The connecting socket 2 includes: a first socket XP1 and a second socket XP2.

[0035] The board under test is a flight parameter collector, which at least includes a power supply module under test and an excitation source module.

[0036] The test box 1 is connected to the first socket XP1 and the second socket XP2, and the first socket XP1 and the second socket XP2 are connected to the board under test. The board under test is connected to the test box 1 through the first socket XP1 and the second socket XP2, and the test work is completed by operating the switch set on the panel of the test box 1.

[0037] Exemplarily, the power module under test provides 4 constant voltage sources and needs to be tested.

[0038] In a specific embodiment:

[0039] When the power module of the flight parameter collector under test is connected to the test device by connecting the first socket XP1, the signal of the power module under test is introduced into the test device through the socket, such as Figure 2 As shown, a 28V DC regulated power supply provides a working voltage for the device, the positive pole of the DC power supply is connected to pin 1 of switch S1, the negative pole of the DC voltage is connected to pin 2 of switch S1, pin 3 of switch S1 is connected to C34 (28VDC) connected to the first socket XP1, and pin 4 of switch S1 is connected to C36 (PGND) connected to the first socket XP1. When switch S1 is pressed, pin 1 of S1 is connected to pin 3, pin 2 of S1 is connected to pin 4, and 28V is connected to the first socket XP1 for testing. The test device has a built-in first power conversion module U1. The DC regulated power supply provides a 28V input voltage to U1 through the test device, and the first power conversion module U1 converts the DC 28V voltage into +15V, -15V, and +5V voltages.

[0040] The 28V DC regulated power supply is connected to the test device via a power supply cable 3 .

[0041] +15V, -15V, +5V voltages are connected to the 8th, 9th and 7th pins of the knob selection switch K1 respectively, and are also connected to A48, A49 and A2 of the socket of the power module under test, to display whether each conversion voltage of the U1 module is accurate;

[0042] The 1st pin of the knob selection switch K1 is connected to the voltage test terminal of the voltage display meter T1 (for example Figure 3 The voltage display meter T1 can display the voltage value selected by the knob selection switch K1.

[0043] When pin 1 and pin 2 of the knob selection switch K1 are connected, the voltmeter T1 displays the output of the 1st constant voltage source of the power module under test; when pin 1 and pin 3 of the knob selection switch K1 are connected, the voltmeter T1 displays the output of the 2nd constant voltage source of the power module under test; when pin 1 and pin 4 of the knob selection switch K1 are connected, the voltmeter T1 displays the output of the 3rd constant voltage source of the power module under test; when pin 1 and pin 5 of the knob selection switch K1 are connected, the voltmeter T1 displays the output of the 4th constant voltage source of the power module under test.

[0044] When pin 1 of the knob selection switch K1 is connected to pin 6, the voltmeter T1 displays the PDOWN output of the power module under test.

[0045] When pin 1 of the knob selection switch K1 is connected to pin 7, the voltmeter T1 displays a +5V output; when pin 1 of the knob selection switch K1 is connected to pin 8, the voltmeter T1 displays a -15V output; when pin 1 of the knob selection switch K1 is connected to pin 9, the voltmeter T1 displays a +15V output.

[0046] The test device has a built-in 5V to 3.3V conversion chip, i.e., the second power conversion module U2. U2 is an LTM1086IM chip. Pin 3 of U2 is connected to pin 2 of the first socket XP1. Pin 3 of U2 is connected to XP1 socket A50 through the first capacitor C1. Pin 4 of U2 is connected to pin 2. Pin 2 of U2 is connected to pin 2 of channel switch K3. Pin 2 of U2 is connected to socket A50 through the second capacitor C2. B18, A12, and B12 of the first socket XP1 are short-circuited and connected to pin 1 of K3.

[0047] One end of the voltage-dividing resistor R1 is connected to A2 of the first socket XP1, the other end of the voltage-dividing resistor R1 is connected to the positive end of the light-emitting diode L1, and the negative end of the light-emitting diode L1 is connected to C21 of the first socket XP1, one end of the voltage-dividing resistor R2 is connected to A2 of the first socket XP1, the other end of the voltage-dividing resistor R2 is connected to the positive end of the light-emitting diode L2, and the negative end of the light-emitting diode L2 is connected to A13 of the first socket XP1, one end of the voltage-dividing resistor R3 is connected to A2 of the first socket XP1, the other end of the voltage-dividing resistor R3 is connected to the positive end of the light-emitting diode L3, and the negative end of the light-emitting diode L3 is connected to B13 of the first socket XP1.

[0048] Among them, B18, A12, and B12 of the first socket XP1 are respectively led out from the control circuits of the three relays on the power module under test. When K3 is closed, the control circuit generates magnetic force and attracts the relay. Correspondingly, C21, A13, and B13 of the first socket XP1 are respectively led out from the relay circuits of the three relays on the power module under test. When the relay circuit is closed, the three light-emitting diodes connected to C21, A13, and B13 of the first socket XP1 form a circuit.

[0049] When pin 1 and pin 2 of K3 are connected, if the three relays on the tested power board are normal, the light-emitting diodes L1, L2, and L3 will emit green light at the same time. If one of the relays fails, the corresponding light-emitting diode will be off. Through this operation, the quality of the three relays on the tested power board can be quickly determined.

[0050] The negative end of the light-emitting diode L4 is connected to A50 of the first socket XP1, the green pole of the light-emitting diode L4 is connected to A21 (GREEN green light control signal) of the first socket XP1, the red pole of the light-emitting diode L4 is connected to B21 (RED red light control signal) of the first socket XP1, the pin 1 of the switching switch K4 is connected to B19 ( / FAIL) of the first socket XP1, and the pin 2 of the switching switch K4 is connected to A50 of the first socket XP1. When pin 1 and pin 2 of K4 are disconnected, the FAIL signal is high level, and L4 outputs green light. When pin 1 and pin 2 of K4 are connected, the FAIL signal is low level, and L4 outputs red light. This function can test the fault of the six inverter chips on the power module.

[0051] FAIL is the fault control light signal input pin of the six-inverter chip of the power board to be tested.

[0052] When the excitation source module of the flight parameter collector under test is connected to the test device by connecting the second socket XP2, the signal of the excitation source module under test is introduced into the test device through the socket, such as Figure 3As shown, pin 47 of the second socket XP2 is connected to pin 3 of switch S1, and pin 46 of the second socket XP2 is connected to pin 4 of switch S1. When switch S1 is pressed, pin 1 of S1 is connected to pin 3, and pin 2 of S1 is connected to pin 4. 28V is connected to the second socket XP2 for testing, providing working voltage for the excitation source module under test.

[0053] Pin 1 of the load switch K2 is connected to A45 of the second socket XP2, pin 2 of the load switch K2 is connected to one end of the R4 70Ω resistor, the other end of the R4 70Ω resistor is connected to A44 of the second socket XP2, pin 3 of the load switch K2 is connected to one end of the R5 14Ω resistor, the other end of the R5 14Ω resistor is connected to A44 of XP2. When pin 1 of K2 is connected to pin 2, a 70Ω load will be provided for the excitation source module, and when pin 1 of K2 is connected to pin 3, a 14Ω load will be provided for the excitation source module.

[0054] Whether the tested excitation source module works normally can be determined by measuring whether the voltage changes under different load conditions at the TP2 test hole.

[0055] According to the requirements of the excitation source board under test, the module's output voltage and output frequency have high accuracy requirements. If the displayed value deviates greatly, the circuit parameters should be adjusted and individual circuit components (resistors to be replaced) should be replaced. By replacing resistors with appropriate resistance values, accurate output can be ensured.

[0056] For the resistor to be replaced of the excitation source module under test, a knob potentiometer X1 can be connected in parallel at both ends. By adjusting X1, when the voltage at both ends of X1 is adjusted to the required accuracy, the resistance value at both ends of X1 is measured and recorded. Then, the appropriate replacement resistor can be determined based on the recorded value.

[0057] The resistor to be replaced may be one or a combination of multiple resistors connected in series or parallel.

[0058] The utility model provides a flight parameter collector power module and excitation source module test device, including a test box, a power supply cable and a connection socket. The test box is connected to the connection socket, and the connection socket is connected to the board under test. The board under test is connected to the test box through the connection socket, and the test work is completed by operating the switch set on the test box panel. The test box includes a power switch S1, a voltage display table T1, a test hole TP1, a test hole TP2, a knob selection switch K1, a load switch K2, a channel switch K3, a switching switch K4, a light-emitting diode L1, a light-emitting diode L2, a light-emitting diode L3, a light-emitting diode L4, a first socket XP1, a second socket XP2, a first power conversion module U1, and a second power conversion module U2.

[0059] The flight parameter collector power module and excitation source module test device provided by the utility model connects the collector power module and the excitation source module to be tested through the test box and the connection socket, and has the following beneficial effects:

[0060] (1) Improve the convenience of testing, eliminating the trouble of welding wires and external power supply, greatly improving the convenience of testing.

[0061] (2) Save test time and improve work efficiency. The operation method is simple and reliable. Only a few switches need to be turned to complete the test items required by the technical documents. When using the utility model for testing, the entire test process takes less than 1 minute, which improves the efficiency of the test process by 30 times.

[0062] (3) The quality of the power board is guaranteed. The traditional test method requires secondary welding of the solder joints when welding wires. The test device does not require any welding of the power board, thus avoiding risks and ensuring the quality of the power board.

[0063] (4) The accuracy of the output frequency and voltage of the excitation source board is improved. The traditional debugging method uses a resistor box to adjust the frequency and voltage, which has low accuracy. The test fixture uses a high-precision multi-turn potentiometer to adjust the frequency and voltage. The load resistor uses a high-power resistor to simulate 70Ω and 14Ω loads respectively. This test fixture can adjust the output frequency and voltage of the excitation source board to a very high accuracy.

Claims

1. A flight parameter collector test device, characterized in that: include: Test box (1); The board under test includes: a power supply module under test and an excitation source module under test; The test box (1) comprises: a power switch S1, a voltage display meter T1, a knob selection switch K1, a load switch K2, a channel switch K3, a light emitting diode L1, a light emitting diode L2, a light emitting diode L3, a first socket XP1, a second socket XP2, a first power conversion module U1, and a second power conversion module U2; The tested power supply module and the tested excitation source module of the tested board are connected to the test box (1) through the first socket XP1 and the second socket XP2 respectively; The DC power supply supplies power to the power module under test through the power switch S1 and the first socket XP1, and supplies power to the excitation source module under test through the power switch S1 and the second socket XP2; The first power conversion module U1 is connected to the power module under test through the first socket XP1, receives power from the power module under test, and generates three conversion voltages to provide to the power module under test; The knob selection switch K1 includes pins 1 to 9, wherein pin 1 is connected to the voltage test terminal of the voltage display meter T1, pins 2 to 5 are respectively connected to the 4-way constant voltage source output of the power module under test, pin 6 is connected to the PDOWN output of the power module under test, and pins 7 to 9 are respectively connected to the 3-way constant voltage source output of the first power conversion module U1; The second power conversion module U2 is connected to the 5V constant voltage source output of the power module under test, and is used to convert the 5V constant voltage source into a 3.3V constant voltage source; the first end of the channel switch K3 is connected to the second power conversion module U2, and the second end is connected to the control loop of the three relays in the power module under test. When the channel switch K3 is closed, the control loop generates magnetic force to attract the relay; The first ends of the light emitting diode L1, the light emitting diode L2 and the light emitting diode L3 are respectively connected to the 3.3V constant voltage source output end of the power module under test through a voltage dividing resistor, and the second ends are respectively connected to the relay circuits of the three relays on the power module under test; The fixed end of the load switch K2 is connected to the first load end of the excitation source module under test, the two selection ends of the load switch K2 are respectively connected to the first end of a load resistor with different resistance values, and the second ends of the two load resistors are connected to the second load end of the excitation source module under test; Voltage test holes are provided at the first load end and the second load end of the tested excitation source module.

2. The flight parameter collector test device according to claim 1, characterized in that: The first power conversion module U1 is also connected to the voltage display meter T1 to supply power to the voltage display meter T1.

3. The flight parameter collector test device according to claim 2, characterized in that: A positive terminal of a voltage test hole is also provided at pin 1 of the knob selection switch K1, and a negative terminal of a voltage test hole is also provided at the ground terminal of the voltage display meter T1.

4. The flight parameter collector test device according to claim 1, characterized in that: The power input terminal of the second power conversion module U2 is also grounded through the first capacitor C1; the power output terminal is also grounded through the second capacitor C2.

5. The flight parameter collector test device according to claim 1, characterized in that: The resistance values ​​of the two load resistors are 15Ω and 70Ω respectively.

6. The flight parameter collector test device according to claim 1, characterized in that: The test box (1) further comprises: a light emitting diode L4 and a switching switch K4; The negative terminal of the light emitting diode L4 is grounded, the green terminal is connected to A21 of the first socket XP1, and the red terminal is connected to B21 of the first socket XP1; A first end of the switch K4 is connected to a fault control light signal input pin of the six-inverter chip of the power board to be tested, and a second end of the switch K4 is grounded; When the switch K4 is disconnected, the light emitting diode L4 outputs green light, and when the switch K4 is connected, the light emitting diode L4 outputs red light.

Images