Detection device

Abstract

The utility model discloses a detection device which comprises a tester module, a pedal sensor test line module and a safety valve test line module. Wherein the tester module comprises a first test end and a second test end; the pedal sensor test line module comprises a third test end and a first receiving end; the safety valve test line module comprises a fourth test end and a second receiving end; the first testing end is connected with the first receiving end, and the third testing end is used for being connected with a first connecting end of a cockpit pedal sensor to be tested; the second testing end is connected with the second receiving end, and the fourth testing end is used for being connected with a second connecting end of the safety valve electric plug to be tested. According to the utility model, the narrow working environment on the aircraft can be avoided through remote operation, the function test of the safety valve and the pedal sensor of the aircraft landing gear can be accurately completed at one time, and the test efficiency and the reliability of the landing gear system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft component detection, in particular to a detection device for detecting aircraft safety valves and cockpit pedal sensors. Background Art

[0002] The landing gear of the Airbus A320 series aircraft supports the aircraft when it is on the ground, retracts into the landing gear compartment in the belly of the aircraft after takeoff, and extends again when landing. The cockpit pedal sensor and safety valve are important components of the landing gear system. The failure of any component will directly affect flight safety, and its failure cannot be detected by the onboard monitoring system.

[0003] However, Airbus only provides test parameters but no reliable test equipment. Maintenance personnel either follow the aircraft maintenance manual and build simple circuits according to the parameters in the manual, but the simple circuits built on the job site have problems such as unstable test process and inaccurate test results; or use a single-module tester for the landing gear safety valve, but the test results are often biased due to battery consumption during the test, and maintenance personnel need to perform component function tests in the small aircraft electronic compartment, which is both time-consuming and laborious. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a detection device, which can avoid the cramped working environment on the aircraft through remote operation, and can accurately complete the functional test of the aircraft landing gear safety valve and pedal sensor at one time, thereby improving the test efficiency and the reliability of the landing gear system.

[0005] The embodiment of the utility model provides a detection device, comprising: a tester module, a pedal sensor test line module and a safety valve test line module;

[0006] Wherein, the tester module includes a first test end and a second test end; the pedal sensor test line module includes a third test end and a first receiving end; the safety valve test line module includes a fourth test end and a second receiving end;

[0007] The first test end of the tester module is connected to the first receiving end of the pedal sensor test line module, and the third test end of the pedal sensor test line module is used to connect to the first connecting end of the cockpit pedal sensor to be tested;

[0008] The second test end of the tester module is connected to the second receiving end of the safety valve test line module, and the fourth test end of the safety valve test line module is used to connect to the second connecting end of the safety valve electrical plug to be tested.

[0009] As one of the preferred solutions, the tester module includes a voltage output unit and a resistance voltage measurement unit;

[0010] The voltage output unit includes a first DC voltage output interface and a second DC voltage output interface; the resistance voltage measurement unit includes a resistance voltage measurement interface; wherein the interface includes a positive electrode interface and a negative electrode interface; the first DC voltage output interface serves as the first test end of the tester module, and is used to connect to the first receiving end of the pedal sensor test line module; the second DC voltage output interface and the resistance voltage measurement interface serve as the second test end of the tester module, and are used to connect to the first receiving end of the safety valve test line module.

[0011] As one preferred solution, the first DC voltage output interface outputs a voltage of 10 volts, the second DC voltage output interface outputs a voltage of 1.5 volts, and the resistance voltage measurement unit has a built-in resistor of 5.6 ohms.

[0012] As one of the preferred schemes, the pedal sensor test line module includes an electric plug unit and a first test line unit, one end of the electric plug unit is connected to one end of the first test line unit; the other end of the first test line unit serves as the first receiving end of the pedal sensor test line module and the first test end of the tester module, and the other end of the first test line unit is also used to connect to the measuring end of an external multimeter; the other end of the electric plug unit serves as the third test end of the pedal sensor test line module, and is used to connect to the first connection end of the cockpit pedal sensor to be tested; wherein, the first test line unit includes a red G line, a black U line, a yellow A line and a blue M line; the electric plug unit includes an aviation plug.

[0013] As one of the preferred solutions, the red G line and the black U line are connected to the first DC voltage output interface of the tester module; the yellow A line and the blue M line are used to connect to the measuring end of an external multimeter; and the aviation plug is used to match and connect with the first connection end of the cockpit pedal sensor to be tested.

[0014] As one of the preferred schemes, the safety valve test line module includes a second test line unit and a pin unit, and the pin units are respectively installed at both ends of the second test line unit; one end of the pin unit serves as the first receiving end of the safety valve test line module and is connected to the second test end of the tester module; the other end of the pin unit serves as the fourth test end of the safety valve test line module, and is used to be connected to the second connection end of the safety valve electrical plug to be tested; wherein, the second test line unit includes a red line and a black line; the pin unit includes a PIN-type pin and a SOCKET-type pin; the PIN-type pin is installed at one end of the red line, and the SOCKET-type pin is installed at the other end; the PIN-type pin is installed at one end of the black line, and the SOCKET-type pin is installed at the other end; the PIN-type pin is connected to the second DC voltage output interface of the tester module, and the SOCKET-type pin is used to be connected to the second connection end of the safety valve electrical plug to be tested.

[0015] As one of the preferred solutions, the tester module further includes a circuit unit, a working light unit and a power switch unit;

[0016] Wherein, the control end of the power switch unit is respectively connected to the third receiving end of the working light unit and the input end of the circuit unit; the power switch unit includes a first power switch and a second power switch; the circuit unit includes a parallel power input circuit, a first power switch chip circuit, a second power switch chip circuit, a voltage boosting chip circuit and a power output circuit, wherein the output end of the parallel power input circuit is respectively connected to the input end of the first power switch chip circuit and the input end of the second power switch chip circuit, the output end of the first power switch chip circuit is connected to the second DC voltage output interface, the output end of the second power switch chip circuit is connected to the input end of the voltage boosting chip circuit, the output end of the voltage boosting chip circuit is connected to the first DC voltage output interface, the first port and the second port of the power output circuit are connected to the first receiving end of the pedal sensor test line module, and the third port and the fourth port of the power output circuit are connected to the first receiving end of the safety valve test line module.

[0017] As one preferred solution, the first power switch chip circuit includes a first power chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor and a first inductor;

[0018] Wherein, the input end of the first power chip is connected to one end of the first resistor and the output end of the parallel power input circuit as the input end of the first power switch chip circuit, the enable end of the first power chip is connected to the other end of the first resistor, the bootstrap end of the first power chip is connected to one end of the first capacitor, the external inductor end of the first power chip is connected to the other end of the first capacitor and one end of the first inductor, the feedback end of the first power chip is connected to one end of the third resistor and one end of the fourth resistor, and the ground end of the first power chip is grounded;

[0019] The output end of the parallel power input circuit is also connected to the anode of the second capacitor and one end of the third capacitor respectively, the cathode of the second capacitor is grounded, and the other end of the third capacitor is grounded;

[0020] The other end of the first inductor is connected to the other end of the third resistor, the anode of the fourth capacitor, one end of the fifth capacitor and one end of the second resistor as the output end of the first power switch chip circuit;

[0021] The other end of the fourth resistor is grounded, the cathode of the fourth capacitor is grounded, and the other end of the fifth capacitor is connected to the other end of the second resistor and grounded.

[0022] As one preferred solution, the second power switch chip circuit includes a second power chip, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a second inductor and a light emitting diode:

[0023] Wherein, the input end of the second power chip is connected to one end of the sixth resistor and the output end of the parallel power input circuit as the input end of the second power switch chip circuit, the enable end of the second power chip is connected to the other end of the sixth resistor, the bootstrap end of the second power chip is connected to one end of the sixth capacitor, the external inductor end of the second power chip is connected to the other end of the sixth capacitor and one end of the second inductor, the feedback end of the second power chip is connected to one end of the seventh resistor and one end of the eighth resistor, and the ground end of the second power chip is grounded;

[0024] The output end of the parallel power input circuit is also connected to the anode of the seventh capacitor and one end of the eighth capacitor respectively, the cathode of the seventh capacitor is grounded, and the other end of the eighth capacitor is grounded;

[0025] The other end of the second inductor is connected to the other end of the seventh resistor, the anode of the ninth capacitor, one end of the tenth capacitor and one end of the fifth resistor as the output end of the second power switch chip circuit;

[0026] The other end of the eighth resistor is grounded, the cathode of the ninth capacitor is grounded, the other end of the tenth capacitor is grounded, the other end of the fifth resistor is connected to the anode of the light emitting diode, and the cathode of the light emitting diode is grounded.

[0027] As one of the preferred solutions, the voltage boost chip circuit includes a third power chip, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, a third inductor and a current storage diode;

[0028] Wherein, the input end of the third power chip is respectively connected to one end of the third inductor, one end of the eleventh capacitor and the enable end of the third power chip as the input end of the voltage boost chip circuit, the switch control end of the third power chip is respectively connected to the other end of the third inductor and the positive electrode of the current storage diode, the feedback end of the third power chip is respectively connected to one end of the ninth resistor and one end of the eleventh resistor, and the grounding end of the third power chip is respectively connected to the other end of the eleventh capacitor, the cathode of the twelfth capacitor, one end of the thirteenth capacitor and one end of the tenth resistor and is grounded;

[0029] The cathode of the current storage diode is connected to the other end of the ninth resistor, the anode of the twelfth capacitor, the other end of the thirteenth capacitor and the other end of the tenth resistor as the output end of the voltage boosting chip circuit.

[0030] Compared with the prior art, the utility model provides a detection device, including a tester module, a pedal sensor test line module and a safety valve test line module. The function test of the corresponding components is realized by matching the tester with the test line, which can achieve reliable connection and avoid the cramped working environment on the aircraft through remote operation, and can accurately complete the function test of the landing gear safety valve and pedal sensor of the A320 series aircraft at one time, thereby improving the test efficiency and the reliability of the landing gear system and avoiding return flight due to failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the detection device provided by the utility model;

[0032] Figure 2 It is a schematic diagram of the tester module provided by the utility model;

[0033] Figure 3It is a schematic diagram of a pedal sensor test line module provided by the utility model;

[0034] Figure 4 This is the principle diagram of the cockpit pedal sensor provided by the utility model;

[0035] Figure 5 This is a connection diagram of the pedal sensor test line module provided by the utility model;

[0036] Figure 6 It is a schematic diagram of the safety valve test line module provided by the utility model;

[0037] Figure 7 This is a connection diagram of the safety valve test line module provided by the utility model;

[0038] Figure 8 It is a circuit diagram of a parallel power input circuit and a power output circuit provided by the utility model;

[0039] Fig. 9 This is the circuit diagram of the first power switch chip provided by the utility model;

[0040] Fig.10 This is a circuit diagram of a two-power switch chip provided by the utility model;

[0041] Fig.11 The utility model provides a circuit diagram of a voltage boost chip. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] In the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In the description of this application, it should be noted that, unless otherwise defined, all technical and scientific terms used in this utility model have the same meanings as those commonly understood by technicians in the technical field of this invention. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0046] See also Figure 1 , the embodiment of the utility model provides a detection device, including: a tester module 1, a pedal sensor test line module 2 and a safety valve test line module 3;

[0047] Wherein, the tester module 1 includes a first test end and a second test end; the pedal sensor test line module 2 includes a third test end and a first receiving end; the safety valve test line module 3 includes a fourth test end and a second receiving end;

[0048] The first test end of the tester module 1 is connected to the first receiving end of the pedal sensor test line module 2, and the third test end of the pedal sensor test line module 2 is used to connect to the first connecting end of the cockpit pedal sensor to be tested;

[0049] The second test end of the tester module 1 is connected to the second receiving end of the safety valve test line module 3, and the fourth test end of the safety valve test line module 3 is used to connect to the second connecting end of the safety valve electrical plug to be tested.

[0050] In the specific implementation process, the functional test of the corresponding components is realized by matching the tester with the test line, that is, the tester module 1 is connected with the pedal sensor test line module 2 to realize the functional test of the cockpit pedal sensor to be tested, and the tester module 1 is connected with the safety valve test line module 3 to realize the functional test of the safety valve solenoid valve to be tested. It can not only achieve reliable connection and avoid the cramped working environment on the aircraft through remote operation, but also accurately complete the functional test of the landing gear safety valve and pedal sensor of the A320 series aircraft at one time, improve the test efficiency and the reliability of the landing gear system, and avoid return due to failure.

[0051] See also Figure 2 , as an improvement of the above solution, the tester module 1 includes a voltage output unit 11 and a resistance voltage measuring unit 13;

[0052] The voltage output unit 11 includes a first DC voltage output interface 111 and a second DC voltage output interface 112; the resistance voltage measurement unit 13 includes a resistance voltage measurement interface 131; wherein the interface includes a positive electrode interface and a negative electrode interface; the first DC voltage output interface 111 serves as the first test end of the tester module 1, and is used to connect to the first receiving end of the pedal sensor test line module 2; the second DC voltage output interface 112 and the resistance voltage measurement interface 131 serve as the second test end of the tester module 1, and are used to connect to the first receiving end of the safety valve test line module 3.

[0053] It can be understood that the first DC voltage output interface 111 is used to detect the function of the cockpit pedal sensor; the second DC voltage output interface 112 and the resistance voltage measurement interface 131 are used to detect the function of the safety valve solenoid valve.

[0054] As an improvement of the above solution, the first DC voltage output interface 111 outputs a voltage of 10 volts, the second DC voltage output interface 112 outputs a voltage of 1.5 volts, and the resistance voltage measuring unit 13 has a built-in resistor of 5.6 ohms.

[0055] See also Figure 3 As an improvement of the above scheme, the pedal sensor test line module 2 includes an electric plug unit 21 and a first test line unit 22, one end of the electric plug unit 21 is connected to one end of the first test line unit 22; the other end of the first test line unit 22 serves as the first receiving end of the pedal sensor test line module 2 and the first test end of the tester module 1, and the other end of the first test line unit 22 is also used to connect to the measuring end of an external multimeter; the other end of the electric plug unit 21 serves as the third test end of the pedal sensor test line module 2, which is used to connect to the first connection end of the cockpit pedal sensor to be tested; wherein, the first test line unit 22 includes a red G line, a black U line, a yellow A line and a blue M line; the electric plug unit 21 includes an aviation plug.

[0056] As an improvement of the above scheme, the red G line and the black U line are connected to the first DC voltage output interface 111 of the tester module 1; the yellow A line and the blue M line are used to connect to the measuring end of an external multimeter; the aviation plug is used to match and connect with the first connection end of the cockpit pedal sensor to be tested.

[0057] It should be noted that the aviation plug 221 is of specific model E0052R16B26SN, which can match the electrical socket of the cockpit pedal sensor to be tested; of course, the aviation plug 221 described in the embodiment of the utility model can also be other types and models of electrical plugs, which are not specifically limited here.

[0058] In the specific implementation process, the red G line and the black U line are connected to the 10V DC output terminal of the tester, and the yellow A line and the blue M line are connected to the measuring terminal of the external multimeter. The cockpit pedal sensor connecting rod to be tested is adjusted. At this time, the voltage value measured by the external multimeter connected to the yellow A line and the blue M line is changing. According to the requirements of the aircraft maintenance manual, when the DC voltage value output by the external multimeter is 1.57V (with an error of plus or minus 0.03V), the cockpit pedal sensor connecting rod to be tested has been adjusted to the correct position.

[0059] For example, see Figure 4 There are three sets of identical test sensors in the cockpit pedal sensor, namely the first sensor, the second sensor and the third sensor. According to the requirements of the aircraft maintenance manual, only the adjustment test of the second sensor needs to be completed among the three sets of sensors.

[0060] See also Figure 5 , the pedal sensor is connected to the left and right brake pedals by two adjustable length connecting rods (left connecting rod LH and right connecting rod RH). After replacing the brake pedal sensor, the tester adjusts the length of the two connecting rods to make the pedal sensor output meet the requirements of the AMM procedure in the aircraft maintenance manual. In the figure, A is connected to the yellow line of the pedal sensor test line, which is the positive output terminal of the left connecting rod LH position; M is connected to the blue line of the pedal sensor test line, which is the positive output terminal of the right rod RH position; G is connected to the red line of the pedal sensor test line, which is the positive output terminal of the 10V DC voltage; U is connected to the black line of the pedal sensor test line, which is connected to the common negative terminal. During the test, by applying a stable voltage of 10±0.1V to the pedal sensor to be tested, the pin G is connected to the 10V voltage, and the pin U is connected to the negative terminal. For the calibration of the left connecting rod LH, use an external multimeter to measure the voltage between pin A (output +) and pin U, and adjust the length of the left connecting rod LH to ensure that the external multimeter measurement value is stable within the range of 1.57±0.03V, fix the position of the left connecting rod LH, and complete the calibration. Similarly, for the calibration of the right connecting rod RH, use the voltage between pin M (output +) and pin U, adjust the length of the right connecting rod RH, ensure that the multimeter measurement value is stable within the range of 1.57±0.03V, and fix the position of the right connecting rod RH.

[0061] See also Figure 6As an improvement of the above scheme, the safety valve test line module 3 includes a second test line unit 31 and a pin unit 32, and the pin units 32 are respectively installed at both ends of the second test line unit 31; one end of the pin unit 32 is connected to the second test end of the tester module 1 as the first receiving end of the safety valve test line module 3; the other end of the pin unit 32 is used as the fourth test end of the safety valve test line module 3, which is used to connect with the second connection end of the safety valve electrical plug to be tested; wherein, the second test line unit 31 includes a red line and a black line; the pin unit 32 includes a PIN-type pin and a SOCKET-type pin; the PIN-type pin is installed at one end of the red line, and the SOCKET-type pin is installed at the other end; the PIN-type pin is installed at one end of the black line, and the SOCKET-type pin is installed at the other end; the PIN-type pin is connected to the second DC voltage output interface 112 of the tester module 1, and the SOCKET-type pin is used to connect to the second connection end of the safety valve electrical plug to be tested.

[0062] In the specific implementation process, the PIN type pin end is connected to the 1.5V DC output end of the tester; the SOCKET type pin adopts the EN3646 aviation plug special SOCKET type pin to connect the A pin and the B pin of the safety valve electrical plug to be tested.

[0063] For example, see Figure 7 , connect the external multimeter to both ends of the 5.6 ohm resistor of the tester, that is, connect the red test lead to the red end and the black test lead to the black end, then read the corresponding voltage value, and check whether the voltage value meets the requirements of the aircraft maintenance manual. The test process will read the two-stage voltage value of 5.6 ohms twice. The first time, connect the safety valve test line SOCKET type pin A nail to the A port of the safety valve electrical plug to be tested, and the safety valve test line SOCKET type pin B nail is connected to the B port of the safety valve electrical plug to be tested, and read the voltage across 5.6 ohms. The second time, connect the safety valve test line SOCKET type pin end A nail to the B port of the safety valve electrical plug to be tested, and the safety valve test line SOCKET type pin B nail is connected to the A port of the safety valve electrical plug to be tested, and read the voltage across 5.6 ohms.

[0064] See also Figure 2 , as an improvement of the above solution, the tester module 1 further includes a circuit unit, a working light unit 12 and a power switch unit 14;

[0065] Wherein, the control end of the power switch unit 14 is respectively connected to the third receiving end of the working light unit 12 and the input end of the circuit unit; the power switch unit 14 includes a first power switch 141 and a second power switch 142; the circuit unit includes a parallel power input circuit, a first power switch 141 chip circuit, a second power switch 142 chip circuit, a voltage boost chip circuit and a power output circuit, wherein the output end of the parallel power input circuit is respectively connected to the input end of the first power switch 141 chip circuit and the input end of the second power switch 142 chip circuit, the output end of the first power switch 141 chip circuit is connected to the second DC voltage output interface 112, the output end of the second power switch 142 chip circuit is connected to the input end of the voltage boost chip circuit, the output end of the voltage boost chip circuit is connected to the first DC voltage output interface 111, the first port and the second port of the power output circuit are connected to the first receiving end of the pedal sensor test line module 2, and the third port and the fourth port of the power output circuit are connected to the first receiving end of the safety valve test line module 3.

[0066] During the specific implementation process, the power switch unit 14 is used to control the startup of the tester module. When the first power switch 141 is turned on, or the second power switch 142 is turned on, or the first power switch 141 and the second power switch 142 are turned on at the same time, the tester module can start normally; the working light unit is used to indicate the working status of the tester module. When the power switch unit 14 controls the start of the tester, the working light lights up.

[0067] See also Figure 8 The parallel power input circuit (P1, P2) supplies power to the circuit unit, and the power switch chip circuit provides a constant current and voltage to the output end.

[0068] One end of the safety valve test line is connected to the third port (No. 3) and the fourth port (No. 4) of the power output circuit P3, and the other end is connected to the B pin and the A pin of the electrical plug of the safety valve to be tested. The positive pole of the power supply is connected to the B pin and the negative pole of the power supply is connected to the A pin, and the first value can be read at both ends of the twelfth resistor R12 (5.6R). Similarly, by changing the wiring direction, that is, the positive pole of the power supply is connected to the A pin and the negative pole of the power supply is connected to the B pin, the second value can be read at both ends of the twelfth resistor R12 (5.6R).

[0069] The voltage provided by the second power switch chip circuit is boosted by the voltage boost chip circuit until the voltage value meets the preset requirements and is output through the first port (No. 1) and the second port (No. 2) of the power output circuit P3. The aviation plug of the dedicated pedal sensor test line is connected to the electrical socket of the cockpit pedal sensor to be tested, wherein the power receiving end is inserted into the first port (No. 1) and the second port (No. 2) of the power output circuit P3, and the other two wires can read the measurement value.

[0070] It can be understood that the power input circuit (P1, P2) is connected, the voltage output is stable, and both 9V lithium batteries and 12V lithium batteries can be used, providing a variety of battery options; at the same time, the first port (No. 1) and the second port (No. 2) of the power output circuit P3 perform test output of the pedal sensor, and the third port (No. 3) and the fourth port (No. 4) of the power output circuit P3 perform test output of the safety valve, realizing single-channel input and dual-channel output, providing a variety of test functions, and the output port of P3 and the twelfth resistor R12 (5.6R) at the test end both have installation ports on the test equipment to ensure that the line connection is stable and reliable.

[0071] See also Fig. 9 As an improvement of the above solution, the first power switch chip circuit includes a first power chip U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a first inductor L1;

[0072] The input end of the first power chip U1 is connected to one end of the first resistor R1 and the output end of the parallel power input circuit as the input end of the first power switch chip circuit, the enable end of the first power chip U1 is connected to the other end of the first resistor R1, the bootstrap end of the first power chip U1 is connected to one end of the first capacitor C1, the external inductor end of the first power chip U1 is connected to the other end of the first capacitor C1 and one end of the first inductor L1, the feedback end of the first power chip U1 is connected to one end of the third resistor R3 and one end of the fourth resistor R4, and the ground end of the first power chip U1 is grounded;

[0073] The output end of the parallel power input circuit is also connected to the anode of the second capacitor C2 and one end of the third capacitor C3 respectively, the cathode of the second capacitor C2 is grounded, and the other end of the third capacitor C3 is grounded;

[0074] The other end of the first inductor L1 is connected to the other end of the third resistor R3, the anode of the fourth capacitor C4, one end of the fifth capacitor C5 and one end of the second resistor R2 as the output end of the first power switch chip circuit;

[0075] The other end of the fourth resistor R4 is grounded, the cathode of the fourth capacitor C4 is grounded, and the other end of the fifth capacitor C5 is connected to the other end of the second resistor R2 and grounded.

[0076] See also Fig.10 As an improvement of the above solution, the second power switch chip circuit includes a second power chip U2, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a second inductor L2 and a light-emitting diode D1:

[0077] Among them, the input end of the second power chip U2 is connected to one end of the sixth resistor R6 and the output end of the parallel power input circuit as the input end of the second power switch chip circuit, the enable end of the second power chip U2 is connected to the other end of the sixth resistor R6, the bootstrap end of the second power chip U2 is connected to one end of the sixth capacitor C6, the external inductor end of the second power chip U2 is connected to the other end of the sixth capacitor C6 and one end of the second inductor L2, the feedback end of the second power chip U2 is connected to one end of the seventh resistor R7 and one end of the eighth resistor R8, and the ground end of the second power chip U2 is grounded;

[0078] The output end of the parallel power input circuit is also connected to the anode of the seventh capacitor C7 and one end of the eighth capacitor C8 respectively, the cathode of the seventh capacitor C7 is grounded, and the other end of the eighth capacitor C8 is grounded;

[0079] The other end of the second inductor L2 is connected to the other end of the seventh resistor R7, the anode of the ninth capacitor C9, one end of the tenth capacitor C10 and one end of the fifth resistor R5 as the output end of the second power switch chip circuit;

[0080] The other end of the eighth resistor R8 is grounded, the cathode of the ninth capacitor C9 is grounded, the other end of the tenth capacitor C10 is grounded, the other end of the fifth resistor R5 is connected to the anode of the light emitting diode D1, and the cathode of the light emitting diode D1 is grounded.

[0081] In the specific implementation process, the first power chip U1 and the second power chip U2 both use the power chip model SY8113I, where VIN is the input terminal; EN is the enable terminal, which connects the first resistor R1 and the sixth resistor R6 in series to make them at a high potential to enable the power chip to work; the BS terminal is to realize the duty cycle function of the power chip; LX is the external inductor terminal, which has the function of outputting step-down pulse DC; the first capacitor C1, the sixth capacitor C6, the first inductor L1 and the second inductor L2 have filtering and current storage functions, so that the voltage and current values ​​of the pulse DC become smoother; the fourth capacitor C4, the fifth capacitor C5, the ninth capacitor C9 and the tenth capacitor C10 can all stabilize the output voltage to make the output voltage more stable; the FB terminal is the feedback terminal, and according to the characteristics of this model chip, the feedback terminal voltage is guaranteed to be 0.6V, thereby monitoring the stability of the output voltage. The output power supply voltage is determined by the following formula:

[0082] U1 uses: V out =V i n ( 1+R3 / R4 )

[0083] U2 uses: V out =V i n ( 1+R7 / R8 )

[0084] Among them, V i n is the voltage of the FB terminal, which is 0.6V; V out is the required output voltage, that is Figure 7 and Fig.11 1.5V and 5V.

[0085] See also Fig.11 As an improvement of the above solution, the voltage boost chip circuit includes a third power chip U3, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a third inductor L3 and a current storage diode D2;

[0086] Among them, the input end of the third power chip U3 is connected to one end of the third inductor L3, one end of the eleventh capacitor C11 and the enable end of the third power chip U3 as the input end of the voltage boost chip circuit, the switch control end of the third power chip U3 is connected to the other end of the third inductor L3 and the positive electrode of the current storage diode D2, the feedback end of the third power chip U3 is connected to one end of the ninth resistor R9 and one end of the eleventh resistor R11, and the grounding end of the third power chip U3 is connected to the other end of the eleventh capacitor C11, the cathode of the twelfth capacitor C12, one end of the thirteenth capacitor C13 and one end of the tenth resistor R10 and is grounded;

[0087] The cathode of the current storage diode D2 is connected to the other end of the ninth resistor R9, the anode of the twelfth capacitor C12, the other end of the thirteenth capacitor C13 and the other end of the tenth resistor R10 as the output end of the voltage boosting chip circuit.

[0088] In the specific implementation process, the third power chip U3 adopts the switching power boost chip SX1308, wherein VIN is the input terminal; EN is the enable terminal, which enables the power chip to work; SW is the switch control terminal, which has the function of outputting boost pulse DC; the third inductor L3 and the current storage diode D2 make the pulse DC current smooth; the twelfth capacitor C12 and the thirteenth capacitor C13 can both stabilize the output voltage to make the output voltage more stable; FB is the feedback terminal, and according to the characteristics of this model chip, the feedback terminal voltage is guaranteed to be 0.6V, thereby monitoring the stability of the output voltage. The output power voltage is determined by the following formula:

[0089] U3 uses: V out =V i n (1+R9 / R11 )

[0090] Among them, V i n is the voltage of the FB terminal, which is 0.6V; V out is the desired output voltage.

[0091] It should be noted that, through the current limiting function of the twelfth resistor R12, the current parameter input to the landing gear safety valve solenoid valve during operation is controlled to about 0.22A, so as to meet the requirements of passing the safety valve solenoid valve, and ensure that the power at both ends of the twelfth resistor R12 (5.6 ohms) is greater than 0.25W. Similarly, through the current limiting function of the fifth resistor R5 (1K), the current parameter input to the cockpit pedal sensor during operation is controlled to about 0.5A, so as to meet the requirements of passing the cockpit pedal sensor, and ensure that the input end can work normally in the voltage range of 7V to 14V.

[0092] It is understandable that the output voltage is stabilized by using the DC voltage conversion technology of the power chip SY81131, and at the same time, the DC voltage boost of the power chip SX1308 can achieve voltage conversion within a certain range within the parameters of the same level power supply, and the DC voltage is boosted according to the test requirements. At the same time, the resistance voltage division technology is used to output the input current allowed by the tested component, that is, the required output voltage and the constant current allowed by the output device are obtained through the resistance voltage division technology of the third resistor and the fourth resistor, the seventh resistor and the eighth resistor, and the ninth resistor and the eleventh resistor. In addition, the required output voltage is obtained by combining the boost circuit and the buck circuit to ensure that the power input can work normally from 7V to 14V. For example, if the input is lower than 10V, only the boost circuit needs to be used for boosting. If the input is higher than 10V, it needs to be bucked first and then boosted, so that the output voltage will not fluctuate due to the input battery consumption. In addition, other functional output modules can be developed based on the required power supply parameters on this basis to realize the "one input and multiple outputs" function.

[0093] In the specific implementation process, the detection device can be used to perform a functional test on the electric plug of the safety valve to be tested by following the steps S11 to S16:

[0094] Step S11, turn on the power switch unit to start the tester;

[0095] Step S12, install the device end of the safety valve test line to the third port (No. 3) and the fourth port (No. 4) of the power output circuit P3 of the tester, and install the other end of the safety valve test line to the A pin and the B pin of the electrical plug of the safety valve to be tested, that is, the red line is connected to the B pin, and the black line is connected to the A pin;

[0096] Step S13, connect the red test lead of the external multimeter to the positive terminal of the twelfth resistor R12 (5.6R), connect the black test lead to the negative terminal of the twelfth resistor R12 (5.6R), select the gear to the DC voltage gear and read the first voltage value;

[0097] Step S14, install the device end of the safety valve test line to the third port (No. 3) and the fourth port (No. 4) of the power output circuit P3 of the tester, and install the other end of the safety valve test line to the A pin and the B pin of the electrical plug of the safety valve to be tested, that is, the red line is connected to the A pin, and the black line is connected to the B pin;

[0098] Step S15, connect the red test lead of the external multimeter to the positive terminal of the twelfth resistor R12 (5.6R), connect the black test lead to the negative terminal of the twelfth resistor R12 (5.6R), select the gear to the DC voltage gear and read the second voltage value;

[0099] Step S16: Compare the first voltage value and the second voltage value with the range requirements of the aircraft maintenance manual respectively.

[0100] In the specific implementation process, the detection device can be used to implement the functional test of the aviation plug of the cockpit pedal sensor to be tested by following the steps S11 to S16:

[0101] Step S21, turn on the power switch unit to start the tester;

[0102] Step S22, matching and connecting the aviation plug of the dedicated pedal sensor test line with the A plug of the pedal sensor to be tested;

[0103] Step S23, connect the two pins at the other end of the dedicated pedal sensor test line to the first port (No. 1) and the second port (No. 2) of the power output circuit P3 of the tester, that is, the red G line is connected to the red No. 1 jack, and the black U line is connected to the black No. 2 jack);

[0104] Step S24, connect the blue M line of the crocodile clip end of the dedicated pedal sensor test line to the red test lead of the external multimeter, and connect the yellow A line to the black test lead of the external multimeter, select the DC voltage gear of the external multimeter, rotate the mechanical connecting rod of the cockpit pedal sensor as required, and read the correct value according to the requirements of the aircraft maintenance manual.

[0105] The voltage provided by the second power switch chip circuit is boosted by the voltage boost chip circuit until the voltage value meets the preset requirements and is output through the first port (No. 1) and the second port (No. 2) of the power output circuit P3. The aviation plug of the dedicated pedal sensor test line is connected to the electrical socket of the cockpit pedal sensor to be tested, wherein the power receiving end is inserted into the first port (No. 1) and the second port (No. 2) of the power output circuit P3, and the other two wires can read the measurement value.

[0106] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. It should be pointed out that for those skilled in the art, several equivalent obvious variations and / or equivalent substitutions can be made without departing from the technical principle of the present invention. These obvious variations and / or equivalent substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A detection device, characterized in that: include: Tester module, pedal sensor test line module and safety valve test line module; Wherein, the tester module includes a first test end and a second test end; the pedal sensor test line module includes a third test end and a first receiving end; the safety valve test line module includes a fourth test end and a second receiving end; The first test end of the tester module is connected to the first receiving end of the pedal sensor test line module, and the third test end of the pedal sensor test line module is used to connect to the first connecting end of the cockpit pedal sensor to be tested; The second test end of the tester module is connected to the second receiving end of the safety valve test line module, and the fourth test end of the safety valve test line module is used to connect to the second connecting end of the safety valve electrical plug to be tested.

2. The detection device according to claim 1, characterized in that The tester module includes a voltage output unit and a resistance voltage measurement unit; The voltage output unit includes a first DC voltage output interface and a second DC voltage output interface; the resistance voltage measurement unit includes a resistance voltage measurement interface; wherein the interface includes a positive electrode interface and a negative electrode interface; the first DC voltage output interface serves as the first test end of the tester module, and is used to connect to the first receiving end of the pedal sensor test line module; the second DC voltage output interface and the resistance voltage measurement interface serve as the second test end of the tester module, and are used to connect to the first receiving end of the safety valve test line module.

3. The detection device according to claim 2, characterized in that: The first DC voltage output interface outputs a voltage of 10 volts, the second DC voltage output interface outputs a voltage of 1.5 volts, and the resistance voltage measurement unit has a built-in resistance of 5.6 ohms.

4. The detection device according to claim 3, characterized in that: The pedal sensor test line module includes an electric plug unit and a first test line unit, one end of the electric plug unit is connected to one end of the first test line unit; the other end of the first test line unit serves as the first receiving end of the pedal sensor test line module and the first test end of the tester module, and the other end of the first test line unit is also used to connect to the measuring end of an external multimeter; the other end of the electric plug unit serves as the third test end of the pedal sensor test line module, and is used to connect to the first connection end of the cockpit pedal sensor to be tested; wherein, the first test line unit includes a red G line, a black U line, a yellow A line and a blue M line; the electric plug unit includes an aviation plug.

5. The detection device according to claim 4, characterized in that: The red G line and the black U line are connected to the first DC voltage output interface of the tester module; the yellow A line and the blue M line are used to connect to the measuring end of an external multimeter; the aviation plug is used to match and connect with the first connection end of the cockpit pedal sensor to be tested.

6. The detection device according to claim 5, characterized in that: The safety valve test line module includes a second test line unit and a pin unit, and the pin units are respectively installed at both ends of the second test line unit; one end of the pin unit serves as the first receiving end of the safety valve test line module and is connected to the second test end of the tester module; the other end of the pin unit serves as the fourth test end of the safety valve test line module, and is used to be connected to the second connection end of the safety valve electrical plug to be tested; wherein, the second test line unit includes a red line and a black line; the pin unit includes a PIN-type pin and a SOCKET-type pin; the PIN-type pin is installed at one end of the red line, and the SOCKET-type pin is installed at the other end; the PIN-type pin is installed at one end of the black line, and the SOCKET-type pin is installed at the other end; the PIN-type pin is connected to the second DC voltage output interface of the tester module, and the SOCKET-type pin is used to be connected to the second connection end of the safety valve electrical plug to be tested.

7. The detection device according to claim 6, characterized in that: The tester module also includes a circuit unit, a working light unit and a power switch unit; Wherein, the control end of the power switch unit is respectively connected to the third receiving end of the working light unit and the input end of the circuit unit; the power switch unit includes a first power switch and a second power switch; the circuit unit includes a parallel power input circuit, a first power switch chip circuit, a second power switch chip circuit, a voltage boosting chip circuit and a power output circuit, wherein the output end of the parallel power input circuit is respectively connected to the input end of the first power switch chip circuit and the input end of the second power switch chip circuit, the output end of the first power switch chip circuit is connected to the second DC voltage output interface, the output end of the second power switch chip circuit is connected to the input end of the voltage boosting chip circuit, the output end of the voltage boosting chip circuit is connected to the first DC voltage output interface, the first port and the second port of the power output circuit are connected to the first receiving end of the pedal sensor test line module, and the third port and the fourth port of the power output circuit are connected to the first receiving end of the safety valve test line module.

8. The detection device according to claim 7, characterized in that: The first power switch chip circuit includes a first power chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor and a first inductor; Wherein, the input end of the first power chip is connected to one end of the first resistor and the output end of the parallel power input circuit as the input end of the first power switch chip circuit, the enable end of the first power chip is connected to the other end of the first resistor, the bootstrap end of the first power chip is connected to one end of the first capacitor, the external inductor end of the first power chip is connected to the other end of the first capacitor and one end of the first inductor, the feedback end of the first power chip is connected to one end of the third resistor and one end of the fourth resistor, and the ground end of the first power chip is grounded; The output end of the parallel power input circuit is also connected to the anode of the second capacitor and one end of the third capacitor respectively, the cathode of the second capacitor is grounded, and the other end of the third capacitor is grounded; The other end of the first inductor is connected to the other end of the third resistor, the anode of the fourth capacitor, one end of the fifth capacitor and one end of the second resistor as the output end of the first power switch chip circuit; The other end of the fourth resistor is grounded, the cathode of the fourth capacitor is grounded, and the other end of the fifth capacitor is connected to the other end of the second resistor and grounded.

9. The detection device according to claim 7, characterized in that: The second power switch chip circuit includes a second power chip, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a second inductor and a light emitting diode: Wherein, the input end of the second power chip is connected to one end of the sixth resistor and the output end of the parallel power input circuit as the input end of the second power switch chip circuit, the enable end of the second power chip is connected to the other end of the sixth resistor, the bootstrap end of the second power chip is connected to one end of the sixth capacitor, the external inductor end of the second power chip is connected to the other end of the sixth capacitor and one end of the second inductor, the feedback end of the second power chip is connected to one end of the seventh resistor and one end of the eighth resistor, and the ground end of the second power chip is grounded; The output end of the parallel power input circuit is also connected to the anode of the seventh capacitor and one end of the eighth capacitor respectively, the cathode of the seventh capacitor is grounded, and the other end of the eighth capacitor is grounded; The other end of the second inductor is connected to the other end of the seventh resistor, the anode of the ninth capacitor, one end of the tenth capacitor and one end of the fifth resistor as the output end of the second power switch chip circuit; The other end of the eighth resistor is grounded, the cathode of the ninth capacitor is grounded, the other end of the tenth capacitor is grounded, the other end of the fifth resistor is connected to the anode of the light emitting diode, and the cathode of the light emitting diode is grounded.

10. The detection device according to claim 7, characterized in that: The voltage boost chip circuit includes a third power chip, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, a third inductor and a current storage diode; Wherein, the input end of the third power chip is respectively connected to one end of the third inductor, one end of the eleventh capacitor and the enable end of the third power chip as the input end of the voltage boost chip circuit, the switch control end of the third power chip is respectively connected to the other end of the third inductor and the positive electrode of the current storage diode, the feedback end of the third power chip is respectively connected to one end of the ninth resistor and one end of the eleventh resistor, and the grounding end of the third power chip is respectively connected to the other end of the eleventh capacitor, the cathode of the twelfth capacitor, one end of the thirteenth capacitor and one end of the tenth resistor and is grounded; The cathode of the current storage diode is connected to the other end of the ninth resistor, the anode of the twelfth capacitor, the other end of the thirteenth capacitor and the other end of the tenth resistor respectively as the output end of the voltage boosting chip circuit.

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