An engine circuit integrity detection bench and its usage method

Abstract

An engine circuit integrity detection bench, comprising a detection bench main body, a serial port cable, a power cord, a power adapter, a computer, a test cable and an analog resistance box; the power cord, the power adapter, the computer, the serial port cable, the detection bench main body and the test cable are connected in sequence. The engine circuit integrity detection bench of the present invention can respectively achieve single-point and multi-point detection of the circuit integrity of "the circuit resistance of electrical accessories and electric ignition devices", "the insulation resistance between the circuits of electrical accessories and electric ignition devices and the engine housing", and "the insulation resistance between electrical accessory circuits".

Description

Technical Field

[0001] The present invention relates to the technical field of engine detection, and particularly to an engine circuit integrity detection bench and a using method thereof. Background Art

[0002] An engine, especially a twin-spool turbofan series engine, includes a variety of electrical accessories and electric ignition devices. The quality of these products directly affects the operation of the entire missile. In order to ensure the reliable operation of the engine electrical system, circuit integrity detection must be carried out before its factory shipment, at the technical position, etc. However, in the prior art, there is no circuit integrity detection equipment with mature technology. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art and provide an engine circuit integrity detection bench and a using method thereof.

[0004] The technical solution of the present invention is: an engine circuit integrity detection bench, including a detection bench main body, a serial port cable, a power cord, a power adapter, a computer, a test cable, and an analog resistance box; the power cord, the power adapter, the computer, the serial port cable, the detection bench main body, and the test cable are connected in sequence.

[0005] Further, the engine circuit integrity detection bench includes an outer packing box, and a detection bench main body placement cavity, a serial port cable placement cavity, a power cord placement cavity, a power adapter placement cavity, and a computer placement cavity are arranged inside the packing box; the detection bench main body, the serial port cable, the power cord, the power adapter, and the computer are sequentially placed in the detection bench main body placement cavity, the serial port cable placement cavity, the power cord placement cavity, the power adapter placement cavity, and the computer placement cavity.

[0006] Further, one end of the outer packing box is provided with a handle, and the other end is provided with casters.

[0007] Further, the detection bench main body includes a front panel and a rear panel.

[0008] Further, the front panel is provided with a power card slot, a measurement board card slot, a relay board card slot, and a fan card slot.

[0009] Further, the power card slot includes a first power card slot, a second power card slot, and a third power card slot.

[0010] Further, the rear panel is provided with an electrical accessory socket, an ignition device socket, a calibration socket, a serial port socket, and a power socket.

[0011] The using method of the above-mentioned engine circuit integrity detection bench includes the following steps:

[0012] S100. Preparation and inspection before use

[0013] S110. Check whether the cable and related devices are damaged. If there is no damage, proceed to step S120. If there is damage, return the test bench to the factory or send it to a third party for verification.

[0014] S120. Check whether the test cable matches the engine under test. If it matches, proceed to the subsequent steps. Otherwise, replace the test cable with a matching one.

[0015] S130. Equipment connection

[0016] Connect the power cord, power adapter, computer, main body of the test bench, and test cable in sequence.

[0017] S200. Detection

[0018] S210. Calibration channel detection

[0019] S211. Connect the standard resistor to each port of the test cable in sequence, start the computer and the main body of the detector. The main body of the test bench will measure the voltage value across the standard resistor and display it on the computer.

[0020] S212. If the resistance value calculated by the channel measurement characteristic equation is the same as the standard resistance value, the calibration channel detection is passed.

[0021] If the resistance value calculated by the channel measurement characteristic equation is different from the standard resistance value, modify the coefficients of the channel measurement characteristic equation so that the resistance value calculated by the channel measurement characteristic equation with the modified coefficients is the same as the standard resistance value.

[0022] S213. Record the modified channel measurement characteristic equation, replace the channel measurement characteristic equation in the original database with the modified one. At the same time, modify the standard resistance table of the measurement channel, and then modify and update the database to complete the calibration channel detection.

[0023] S220. Detection of analog resistor

[0024] S221. Connect the analog resistor box to the test cable.

[0025] S222. Start the computer and the main body of the detector. The main body of the test bench will measure the voltage value across each resistor of the analog resistor box and display it on the computer for resistor detection.

[0026] S223. If the resistance value calculated by the channel measurement characteristic equation is the same as the resistance values of each resistor of the analog resistor box in the original database, the detection of the resistance of the analog resistor box is completed.

[0027] If the resistance value calculated by the channel measurement characteristic equation is different from the resistance values of the analog resistor box, record the resistance values of the analog resistor box for this detection, modify the analog resistor meter, and then modify and update the database to complete the analog resistor detection;

[0028] S230. Detect the engine

[0029] S231. Connect the engine under test to the test cable;

[0030] S232. Start the computer and the detection main body. The detection bench main body will measure the voltage values at both ends of each resistor of the engine and display them on the computer to perform engine resistor detection;

[0031] S233. Record the resistance values of each resistor of the engine under test and complete the detection.

[0032] Furthermore, the channel measurement characteristic equation is:

[0033]

[0034] In the above formula, R is the resistance value calculated by the channel measurement characteristic equation, U is the voltage value measured by the detection bench main body at both ends of the standard resistor, I is the current flowing through the standard resistor, which is a known quantity, and η is the correction coefficient of the channel measurement characteristic equation.

[0035] Furthermore, each resistor of the engine includes circuit resistance, resistance to the shell, and insulation resistance between circuits.

[0036] The advantages of the present invention compared with the prior art are as follows:

[0037] 1. The engine circuit integrity detection bench of the present invention can respectively achieve single-point and multi-point detection of the circuit integrity of "circuit resistance of electrical accessories and electric ignition devices", "insulation resistance between the circuits of electrical accessories and electric ignition devices and the engine housing", and "insulation resistance between electrical accessory circuits".

[0038] 2. The engine circuit integrity detection bench of the present invention adopts a standardized design in design. All components are selected as standardized and serialized products, which can ensure long-term supply in the market, and it is convenient to replace and repair components when the product fails.

[0039] 3. The main components of the test equipment of the engine circuit integrity detection bench of the present invention adopt a modular design. For example, the fan, power supply, measurement board, relay board, etc. are all connected to the backplane through PCB electrical connectors, and the test laptop computer is independent of the main body. Therefore, when the detection bench fails, it is convenient to replace and repair modules or single boards.

[0040] 4. For the engine circuit integrity detection bench of the present invention, to prevent incorrect cable connection, the electrical connector socket at the detection bench adopts an anti-misinsertion design. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 FIG. is a schematic diagram of the engine circuit integrity detection bench of the present invention placed in an outer packing box.

[0042] Figure 2 FIG. is a three-dimensional schematic diagram of one direction of the detection bench main body in the engine circuit integrity detection bench of the present invention.

[0043] Figure 3 FIG. is a three-dimensional schematic diagram of another direction of the detection bench main body in the engine circuit integrity detection bench of the present invention.

[0044] Figure 4 FIG. is a schematic diagram of the front panel in the engine circuit integrity detection bench of the present invention.

[0045] Figure 5 FIG. is a schematic diagram of the rear panel in the engine circuit integrity detection bench of the present invention.

[0046] Figure 6 FIG. is a connection schematic diagram of the engine circuit integrity detection bench of the present invention for detecting an engine.

[0047] Figure 7 FIG. is a connection schematic diagram of the engine circuit integrity detection bench of the present invention for detecting a simulated resistor.

[0048] Figure 8 FIG. is a schematic diagram of the test cable for electrical accessory detection in the engine circuit integrity detection bench of the present invention.

[0049] Figure 9 FIG. is a schematic diagram of the test cable for an electric firing device in the engine circuit integrity detection bench of the present invention.

[0050] Figure 10 FIG. is a schematic diagram of the simulated resistor box in the engine circuit integrity detection bench of the present invention.

[0051] Figure 11 FIG. is a flow chart of the usage method of the engine circuit integrity detection bench of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0052] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "abutment" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0054] As Figures 1-11 shown, an engine circuit integrity detection bench includes a detection bench main body 11, a serial port cable 21, a power cord 31, a power adapter 41, a computer 51, a test cable 60 and an analog resistor box 3; the power cord 31, the power adapter 41, the computer 51, the serial port cable 21, the detection bench main body 11 and the test cable 60 are connected in sequence.

[0055] As Figure 1 shown, the engine circuit integrity detection bench further includes an outer packing box 1. A detection bench main body placement cavity 10, a serial port cable placement cavity 20, a power cord placement cavity 30, a power adapter placement cavity 40 and a computer placement cavity 50 are arranged inside the packing box 1; the detection bench main body 11, the serial port cable 21, the power cord 31, the power adapter 41 and the computer 51 are sequentially placed in the detection bench main body placement cavity 10, the serial port cable placement cavity 20, the power cord placement cavity 30, the power adapter placement cavity 40 and the computer placement cavity 50.

[0056] Preferably, one end of the outer packing box 1 is provided with a handle 70, and the other end is provided with casters 80.

[0057] Among them, the detection bench main body 11 includes a front panel 100 and a rear panel 200.

[0058] As Figure 4 shown, the front panel 100 is provided with a power card slot, a measurement board card slot, a relay board card slot and a fan card slot. The power supply, the measurement board 150, the relay board 160 and the fan 170 are respectively inserted into the measurement board card slot, the relay board card slot and the fan card slot. By setting the relevant card slots, the front panel 100 realizes the installation of the related devices of the detection platform, and the setting is simple and practical.

[0059] Preferably, the power card slot includes a first power card slot, a second power card slot and a third power card slot. Correspondingly, the power supply includes a first power supply 120, a second power supply 130 and a third power supply 140. Among them, the output of the third power supply 140 is +12V / 1.5A, which powers the electrical board 160. The output of the second power supply 130 is ±15V, which powers the measurement circuit. The output of the first power supply 120 is 50V and 100V. Among them, 50V is the power supply applied when detecting the insulation resistance of the electric ignition device; the 100V power supply is the power supply applied when detecting the insulation resistance of the electrical accessories.

[0060] Preferably, the fan 170 of the present application is a plug-in thin fan module, such as a product of RS company.

[0061] Further preferably, the relay board 150 includes a total of 5 relay boards, and each board can set different selected addresses through a toggle switch. Among them, the first 4 boards are used for testing the circuit resistance and insulation resistance of electrical accessories and electric ignition devices, and 1 board is used as a backup.

[0062] Preferably, the detection platform main body 11 is provided with a handle 110 to facilitate the lifting of the detection platform main body 11.

[0063] As Figure 6 shown, the rear panel 200 is provided with an electrical accessory socket 210, a point ignition device socket 220, a verification socket 230, a serial port socket 240 and a power socket 250. The rear panel realizes the installation of the sockets required for detection, and the setting is simple and practical.

[0064] As Figure 9 shown, the analog resistor box 3 includes an analog resistor packing box 301, an electrical connector 302, a terminal 303 and a sign 304. When the detection platform main body 11 is self-tested, the resistors of each path in the analog resistor box simulate the resistance values of the corresponding detected circuits on the engine. Preferably, the names and resistance values of the detected circuits on the engine simulated by all the resistors in the analog resistor box are marked on the outer shell of the analog resistor box for metrological verification.

[0065] Preferably, the object to be tested includes the insulation resistance between the electrical accessory, the electric ignition device circuit and the engine housing. Among them, the electrical accessory includes the outlet pressure sensor of the lubricating oil boost pump, the fuel pressure sensor after the heat exchanger, the response signal detection circuit, etc. The electric ignition device circuit includes the firing circuit of the electric explosion valve in the fuel inlet oil circuit, the firing circuit of the electric explosion valve in the lubricating oil inlet oil circuit, and the firing circuit of the electric explosion valve in the bleed air circuit.

[0066] As Figure 11 shown, the usage method of the above-mentioned engine circuit integrity detection bench includes the following steps:

[0067] S100. Preparation and inspection before use

[0068] S110. Check whether the cables and related devices are damaged. If there is no damage, continue to step S120. If there is damage, return the detection bench to the factory or send it to a third party for verification;

[0069] S120. Check whether the test cable matches the engine to be tested. If it matches, continue with the subsequent steps. Otherwise, replace the matching test cable;

[0070] S130. Equipment connection

[0071] Connect the power cord 31, power adapter 41, computer 51, detection bench main body 11, and test cable 60 in sequence;

[0072] S200. Detection

[0073] S210. Calibration channel detection

[0074] S211. Connect the standard resistor to each port of the test cable in sequence, start the computer 51 and the detection main body 11. The detection bench main body 11 will measure the voltage value across the standard resistor and display it on the computer;

[0075] S212. If the resistance value calculated by the channel measurement characteristic equation is the same as the standard resistance value, the calibration channel is detected;

[0076] If the resistance value calculated by the channel measurement characteristic equation is different from the standard resistance value, correct the coefficient of the channel measurement characteristic equation so that the resistance value calculated by the channel measurement characteristic equation after correcting the coefficient of the channel measurement characteristic equation is the same as the standard resistance value;

[0077] Preferably, the channel measurement characteristic equation is:

[0078]

[0079] In the above formula, R is the resistance value calculated by the channel measurement characteristic equation, U is the voltage value measured by the detection table main body 11 across the standard resistance, I is the current flowing through the standard resistance, which are known quantities, and η is the coefficient for correcting the channel measurement characteristic equation;

[0080] S213. Record the modified channel measurement characteristic equation, replace the channel measurement characteristic equation in the original database with the modified one. At the same time, modify the standard resistance table of the measurement channel, and then modify and update the database to complete the calibration channel detection;

[0081] S220. Detect the analog resistance

[0082] S221. Connect the analog resistance box 3 to the test cable 60;

[0083] S222. Start the computer 51 and the detection main body 11. The detection table main body 11 will measure the voltage values across the resistances of the analog resistance box 3 and display them on the computer for resistance detection;

[0084] S223. If the resistance value calculated by the channel measurement characteristic equation is the same as the resistance values of each resistance in the original database of the analog resistance box 3, the detection of the resistance of the analog resistance box is completed;

[0085] If the resistance value calculated by the channel measurement characteristic equation is different from the resistance values of each resistance in the analog resistance box 3, record the resistance values of each resistance of the analog resistance box 3 in this detection, modify the analog resistance table, and then modify and update the database to complete the analog resistance detection;

[0086] S230. Detect the engine

[0087] S231. Connect the engine under test 1 to the test cable 60;

[0088] S232. Start the computer 51 and the detection main body 11. The detection table main body 11 will measure the voltage values across the resistances of the engine and display them on the computer for engine resistance detection; Preferably, the resistances of the engine include circuit resistance, resistance to the shell, and insulation resistance between circuits;

[0089] S233. Record the resistance values of each resistance of the engine under test detected and complete the detection.

[0090] If the resistance value calculated by the channel measurement characteristic equation is different from the resistance values of each resistance in the analog resistance box 3, record the resistance values of each resistance of the analog resistance box 3 in this detection, modify the analog resistance table, and then modify and update the database to complete the analog resistance detection.

[0091] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0092] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for using a detection bench for the integrity of an engine circuit, characterized in that, The engine circuit integrity detection bench includes a detection bench main body, a serial port cable, a power cord, a power adapter, a computer, a test cable, and a simulated resistor box; The power cord, the power adapter, the computer, the serial port cable, the detection bench main body, and the test cable are connected in sequence; The usage method of the engine circuit integrity detection bench includes the following steps: S100. Preparation and inspection before use S110. Check whether the cables and related devices are damaged. If there is no damage, proceed to step S120. If there is damage, return the detection bench to the factory or send it to a third party for verification; S120. Check whether the test cable matches the engine under test. If it matches, proceed to the subsequent steps. Otherwise, replace the matching test cable; S130. Equipment connection Connect the power cord, the power adapter, the computer, the detection bench main body, and the test cable in sequence; S200. Detection S210. Calibration channel detection S211. Connect the standard resistor to each port of the test cable in sequence, start the computer and the detection bench main body, and the detection bench main body will measure the voltage value across the standard resistor and display it on the computer; S212. If the resistance value calculated by the channel measurement characteristic equation is the same as the standard resistance value, the calibration channel detection is passed; If the resistance value calculated by the channel measurement characteristic equation is different from the standard resistance value, modify the coefficient of the channel measurement characteristic equation so that the resistance value calculated by the channel measurement characteristic equation after modifying the coefficient of the channel measurement characteristic equation is the same as the standard resistance value; S213. Record the modified channel measurement characteristic equation, replace the channel measurement characteristic equation in the original database with the modified channel measurement characteristic equation. At the same time, modify the measurement channel standard resistor table, then modify the database and update it to complete the calibration channel detection; S220. Detection of simulated resistor S221. Connect the simulated resistor box to the test cable; S222. Start the computer and the detection bench main body, and the detection bench main body will measure the voltage value across each resistor of the simulated resistor box and display it on the computer for resistor detection; S223. If the resistance value calculated by the channel measurement characteristic equation is the same as the resistance values of each resistor of the simulated resistor box in the original database, the detection of the resistance of the simulated resistor box is completed; If the resistance value calculated by the channel measurement characteristic equation is different from the resistance values of each resistor of the simulated resistor box, record the resistance values of each resistor of the simulated resistor box detected this time, and modify the simulated resistor table, then modify the database and update it to complete the detection of the simulated resistor; S230. Detection of engine S231. Connect the engine under test to the test cable; S232. Start the computer and the detection bench main body, and the detection bench main body will measure the voltage value across each resistor of the engine and display it on the computer for engine resistor detection; S233. Record the resistance values of each resistor of the engine under test detected and complete the detection.

2. The method according to claim 1, wherein: The engine circuit integrity detection bench includes an outer packing box, and inside the packing box, there are provided a detection bench main body placement cavity, a serial port cable placement cavity, a power cord placement cavity, a power adapter placement cavity, and a computer placement cavity; The test bench main body, serial port cable, power cord, power adapter, and computer are sequentially placed in the test bench main body placement cavity, serial port cable placement cavity, power cord placement cavity, power adapter placement cavity, and computer placement cavity.

3. The method according to claim 2, wherein: One end of the outer packing box is provided with a handle, and the other end is provided with casters.

4. The method according to claim 1, wherein: The test bench main body includes a front panel and a rear panel.

5. The method according to claim 4, wherein: The front panel is provided with a power card slot, a measurement board card slot, a relay board card slot, and a fan card slot.

6. The method according to claim 5, characterized in that: The power card slot includes a first power card slot, a second power card slot, and a third power card slot.

7. The method according to claim 4, wherein: The rear panel is provided with an electrical accessory socket, a point ignition device socket, a verification socket, a serial port socket, and a power socket.

8. The method according to claim 1, wherein: The channel measurement characteristic equation is: In the above formula, R is the resistance value calculated by the channel measurement characteristic equation, U is the voltage value measured by the test bench main body across the two ends of the standard resistor, I is the current flowing through the standard resistor, which is a known quantity, and η is the correction coefficient of the channel measurement characteristic equation.

9. The method according to claim 1, wherein: The resistances of the engine include the circuit resistance, the resistance to the shell, and the insulation resistance between circuits.

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