A full-machine cable distributed parallel rapid detection device

Abstract

The application discloses a full-machine cable distributed parallel fast detection equipment. The power socket of a main control box is externally connected with commercial power, a first cable socket is connected with a second cable socket of a parallel test box through a control cable as an output end of the main control box, two adjacent parallel test boxes are connected through a control cable, each parallel test box and each group of local control components are selectively connected through a control cable, each group of local control components comprises a plurality of local control modules, a cable socket in the local control module is connected with a branch cable socket of the parallel test box or connected with a cable socket in another local control module in the same group. The application completes the on-off of a measuring channel between the parallel test boxes through a main channel switching switch, realizes the division of a measuring area, adopts the parallel measurement of multiple measuring areas and the combined mode of the centralized measuring box, and more accurately and efficiently measures the resistance and insulation characteristics of the on-machine cable under the existing on-off speed condition of a mechanical spring relay.

Description

Technical Field

[0001] This invention pertains to automated cable inspection equipment in the field of aircraft cable integrity testing, and particularly relates to a distributed parallel rapid inspection device for all aircraft cables. Background Technology

[0002] In aircraft manufacturing and maintenance, performance testing of onboard cables is a crucial task, ensuring the integrity and reliability of the wiring in aircraft power, avionics, and flight control systems. With numerous onboard cables and tens of thousands of measurement points, traditional manual testing methods are labor-intensive and inefficient. Currently, major domestic and international aircraft manufacturers are gradually replacing manual testing with automated cable testing equipment.

[0003] Based on research and literature and patent reports on existing automated testing equipment for all-machine cables, such as the CKT1175 cable testing system from CK Technologies in the United States, the "Automatic Testing System for On-Machine Cable Integrity" (invention patent CN104297623A), "A Whole Machine Cable Testing System and Method" (invention patent CN113514726A), and "Layout Optimization Design of Automatic Testing System for Whole Machine Cables" (dissertation from Zhejiang University), this type of automated testing equipment for all-machine cables mainly consists of four parts: a test host, a distributed matrix switch box, a transfer cable, and a control cable. Its testing principle and process are as follows: The electrical connector of the cable under test is connected to the distributed matrix switch box through the transfer cable. The control cable connects the test host to each distributed matrix switch box. The control cable includes power supply lines, communication lines, and test lines. The test host controls the relay in the matrix switch box through the control cable to connect two lines of the cable under test to the test lines in the control cable. Then, the measurement module in the test host performs resistance and insulation characteristic tests.

[0004] Common methods for measuring resistance using measurement modules include the two-wire method and the four-wire method. The two-wire method means that the resistance measured from the connection points on the measurement module is considered the external resistance under test. This resistance includes the resistance of the test leads in the control cable, the resistance of the adapter cable, and the resistance of the cable under test. The four-wire method involves drawing four connection points from the measurement module in the test host: "excitation source positive line INPUT+", "excitation source negative line INPUT-", "induction positive line SENSE+", and "induction negative line SENSE-". These connection points are extended to the matrix switch box via the test leads of the control cable. Two positive lines are connected to one measurement point of the cable under test, and the other two negative lines are connected to another measurement point of the cable under test. The advantage of this method is that it cancels out the resistance of the test leads in the control cable between the measurement module and the distributed matrix switch box, essentially moving the connection points on the measurement module to the distributed matrix switch box. However, the measured resistance still includes the resistance of the adapter cable.

[0005] Due to the large size of aircraft, typically tens of meters in length and width, and over ten meters in height, the number of matrix switch boxes for existing aircraft cable testing equipment is limited. These boxes are usually placed on the ground or the cabin floor, requiring adapter cables several meters or even tens of meters long to extend the aircraft cables one-to-one to the matrix switch box. The resistance of a normally conducting aircraft cable under test is generally within a few ohms, considered low resistance. Including the resistance of the adapter cables in the resistance of the tested cable introduces a significant error into the accurate measurement of the aircraft cable resistance. One current solution is to pre-measure and calibrate the resistance of each adapter cable, subtracting it during testing. Clearly, placing the measurement points of the measurement module as close as possible to the measurement points of the aircraft cables under test, or even eliminating the adapter cables altogether, is an effective way to reduce measurement errors and the workload of adapter cable resistance calibration. Eliminating the adapter cables would also solve the cumbersome task of accessing thousands of uniquely identified adapter cables throughout the aircraft, greatly improving testing efficiency.

[0006] Furthermore, existing matrix switch boxes in full-machine cable testing equipment use mechanical relays to centrally switch the on-machine cables corresponding to the measurement points to the test lines for measurement by the testing host. Mechanical relays have advantages such as high overload capacity, no leakage current, and low on-resistance, but their response speed is not high, and there is jitter in the moment the spring contacts close, limiting the switching speed of the measurement channels. Moreover, when the testing host centrally measures the on-machine cables, only two measurement points can be connected at a time, leaving a large number of other measurement points idle. This results in the testing speed of the full-machine cable testing equipment being limited by the response speed of the mechanical relays.

[0007] Current aircraft cable testing equipment suffers from excessively long testing times and low efficiency. Large aircraft have tens of thousands of cable testing points; for example, the Airbus A320 has over 30,000. Using existing equipment, completing a single test of all cables for resistance and insulation can take several hours to tens of hours. This excessive testing time negatively impacts the operational efficiency of the entire aircraft's pulsed production line. This is because existing cable testing equipment uses only one measurement module. All cable measurement points can only be accessed via commands sent from the test host, switching to a multimeter through a distributed matrix switcher box. The speed at which measurement points are accessed is affected by the switching speed of the mechanical reed relays within the matrix switcher box. If the measurement cycle is too fast, the relay reeds may not have engaged yet, or may still be oscillating when they have just engaged, severely impacting test accuracy.

[0008] Analysis of the overall cable continuity and onboard equipment distribution reveals distinct measurement zones, such as the nose, fuselage, tail, left wing, and right wing measurement zones. Cables with continuity are often concentrated in the same measurement zone, with only a small portion spanning multiple zones. Clearly, the only effective method to further shorten onboard cable testing time is to employ a combination of zoned parallel and centralized measurements. Specifically, the distributed matrix switch boxes should have independent resistance and insulation testing functions. Each distributed matrix switch box can independently perform resistance and insulation tests on cables within the same measurement zone, and then a designated distributed matrix switch box can perform resistance and insulation tests on cables spanning multiple measurement zones.

[0009] Therefore, the existing technology lacks a distributed parallel rapid detection device for all cables that can reduce measurement errors caused by adapter cables of different lengths and is more efficient and accurate based on the performance of existing mechanical relays. Summary of the Invention

[0010] To address the speed and accuracy requirements of aircraft cable inspection, this invention designs a distributed parallel rapid inspection device for all aircraft cables. This device combines zoned parallel measurement with centralized measurement, eliminating the need for long connecting cables. It enables rapid testing of the resistance and insulation characteristics of all aircraft cables, offering higher efficiency and greater accuracy compared to traditional aircraft cable inspection equipment. The purpose of this invention is to provide a distributed parallel rapid inspection device for all aircraft cables, suitable for testing the resistance and insulation characteristics of aircraft cables.

[0011] The technical solution adopted in this invention is as follows:

[0012] It includes a main control box, several parallel test boxes, and several sets of local control components. The main control box is connected to a parallel test box via a control cable. Adjacent parallel test boxes are connected to each other via control cables. Each parallel test box and each set of local control components are selectively connected via control cables. Each set of local control components includes several local control modules, and the local control modules are connected to external onboard cables.

[0013] The main control box includes a control computer, a communication board, a switching power supply, a first cable socket, and a power socket. The input end of the power socket is connected to the mains power, and the output end of the power socket is connected to one end of the control computer and one end of the switching power supply. The other end of the control computer is connected to the input end of the first cable socket via the communication board, and the other end of the switching power supply is connected to the input end of the first cable socket. The output end of the first cable socket is connected to the parallel test box.

[0014] The parallel test box includes a second cable socket, several branch cable sockets, a first power module, a first communication module, a first microcontroller, a first drive circuit, a region measurement module, a main channel switching switch, and a third cable socket. The output of the first cable socket in the main control box is connected to the input of the second cable socket in a parallel test box via a control cable. The output of the second cable socket is connected to the inputs of the first power module, the first communication module, the main channel switching switch, the third cable socket, and several branch cable sockets. The first communication module is connected to the main channel switching switch via the first microcontroller and the first drive circuit. The first communication module is also connected to the inputs of several branch cable sockets. The main channel switching switch is also connected to the inputs of several branch cable sockets, one end of the region measurement module, and the input of the third cable socket via control cables. The other end of the region measurement module is connected to the first microcontroller. The output of the branch cable sockets is connected to the input of the local control module. The output of the third cable socket in one parallel test box is connected to the input of the second cable socket in the next adjacent parallel test box.

[0015] The local control module includes a fourth cable socket, a second power module, a second communication module, a second microcontroller, a second drive circuit, a branch channel switching switch, an electrical connector, and a fifth cable socket. The input end of the fourth cable socket is connected to the output end of the branch cable socket via a control cable or to the output end of the fifth cable socket in the previous local control module in the same group of local control components. The fourth and fifth cable sockets in the same local control module are connected to each other via a control cable. The output end of the fourth cable socket is connected to one end of the second power module, one end of the second communication module, and the branch channel switching switch via control cables. The input end of the fifth cable socket is connected to one end of the second power module, one end of the second communication module, and the branch channel switching switch via control cables. The other end of the second communication module is connected to the branch channel switching switch via the second microcontroller and the second drive circuit. The branch channel switching switch is also connected to the electrical connector, which is connected to the on-board cable.

[0016] like Figure 4 As shown, the main channel switching system includes a measurement channel branch switch KA, a measurement channel partition switch KB, and a regional measurement switching switch KC. One end of the measurement channel branch switch KA, one end of the measurement channel partition switch KB, and one end of the regional measurement switching switch KC are connected to the second cable socket, the third cable socket, and the regional measurement module, respectively, via test leads in the control cable. The other end of the regional measurement switching switch KC is connected to each branch cable socket via test leads in the control cable. The other end of the measurement channel branch switch KA is connected to a test lead in the control cable between the regional measurement switching switch KC and the branch cable socket. The other end of the measurement channel partition switch KB is connected to a test lead in the control cable between the measurement channel branch switch KA and the second cable socket. The measurement channel partition switch KB can connect or disconnect the measurement channels between the parallel test boxes, forming a local measurement channel composed of one or more parallel test boxes. The measurement channel branch switch KA is used to control the connection or disconnection of the branch cable socket and the local measurement channel. The regional measurement switching switch KC is used to control the connection or disconnection of the regional measurement module and the measurement channel.

[0017] like Figure 6As shown, the branch channel switching switch includes a first measurement channel selection switch KE, a second measurement channel selection switch KF, a third measurement channel selection switch KG, a fourth measurement channel selection switch KH, a first polarity selection switch KX, and a second polarity selection switch KY. One end of the first measurement channel selection switch KE, one end of the second measurement channel selection switch KF, one end of the third measurement channel selection switch KG, and one end of the fourth measurement channel selection switch KH are all connected to the test lines in the control cable between the fourth cable socket and the fifth cable socket. That is, the fourth cable socket and the fifth cable socket in the same electrical connector module are connected through the test lines. One end of the first measurement channel selection switch KE, one end of the second measurement channel selection switch KF, one end of the third measurement channel selection switch KG, and one end of the fourth measurement channel selection switch KH are respectively connected to the "INPUT+", "SENSE+", and "INPUT" of the test lines between the fourth cable socket and the fifth cable socket. On “-” and “SENSE-”, the other end of the first measurement channel selection switch KE and the other end of the second measurement channel selection switch KF are both connected to one end of the first polarity selection switch KX. The other end of the third measurement channel selection switch KG and the other end of the fourth measurement channel selection switch KH are both connected to one end of the second polarity selection switch KY. The other end of the first polarity selection switch KX and the other end of the second polarity selection switch KY are both connected to the electrical connector. That is, the combined path of the other end of the first measurement channel selection switch KE and the other end of the second measurement channel selection switch KF is connected to one end of several first polarity selection switches KX respectively. The combined path of the other end of the third measurement channel selection switch KG and the fourth measurement channel selection switch KH is connected to one end of several second polarity selection switches KY respectively. The other end of each first polarity selection switch KX and the other end of each second polarity selection switch KY are connected to each measurement point T1 to Tn of the electrical connector.

[0018] This invention eliminates the need for adapter cables to connect to the onboard cables. Instead, the electrical connector of the local control module directly plugs into the electrical connector of the onboard cable, bringing the measurement point closer to the cable and avoiding resistance measurement errors caused by adapter cables of varying lengths. This invention uses a main channel switching switch to control the connection and disconnection of measurement channels between parallel test boxes, thus dividing the measurement area. By combining parallel measurements in multiple measurement areas with a centralized measurement box, it achieves more accurate and efficient measurement of the resistance and insulation characteristics of the onboard cables, even under the current limitations of mechanical reed relay switching speeds.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. Compared to existing aircraft cable testing equipment that uses a single test host for centralized measurement, this invention combines parallel measurement across multiple measurement areas with centralized measurement to measure the resistance and insulation characteristics of aircraft cables. Utilizing the conductivity characteristics of the aircraft cables within each measurement area, and using mechanical relays of equivalent performance for measurement channel switching, the testing time is significantly reduced. By controlling the on / off states of the area measurement channel partition switch KB and the measurement channel branch switch KA, the aircraft measurement areas are rationally divided. Distributed parallel test boxes in different measurement areas can independently measure the resistance and insulation characteristics of aircraft cables with conductivity relationships within their respective measurement areas, achieving parallel measurement across multiple measurement areas.

[0021] 2. Compared to existing full-machine cable testing equipment, this invention eliminates the need for adapter cables, thus avoiding measurement errors caused by the internal resistance of adapter cables of different lengths. By selecting "INPUT+" and "SENSE+" or "INPUT-" and "SENSE-" via the branch measurement channel switch of the local control module of the electrical connector, measurement points T1 to Tn are directly connected to the on-machine cables, making the measurement points of the four-wire method closer to the on-machine cables. Attached Figure Description

[0022] Figure 1 This is a three-dimensional diagram of the present invention;

[0023] Figure 2 This is the functional structure diagram of the main control box;

[0024] Figure 3 This is the functional structure diagram of the parallel test box;

[0025] Figure 4 This is a measurement channel diagram of the parallel test chamber;

[0026] Figure 5 This is a functional structure diagram of the local control module;

[0027] Figure 6 This is a measurement channel diagram of the local control module;

[0028] Figure 7 This is a schematic diagram of the principle of measuring resistance using the four-wire method in this invention;

[0029] Figure 8 This is a measurement channel diagram of the present invention during parallel measurement in partitioned areas;

[0030] Figure 9 This is a measurement channel diagram of the present invention during centralized measurement.

[0031] In the diagram: 1. Main control box; 101. Control computer; 102. Communication board; 103. Switching power supply; 104. First cable socket; 105. Power socket; 2. Parallel test box; 201. Second cable socket; 202. Branch cable socket; 203. First power module; 204. First communication module; 205. First microcontroller; 206. First drive circuit; 207. Area measurement module; 208. Main channel switching switch; 209. Third cable socket; 3. Local control module; 301. Fourth cable socket; 302. Second power module; 303. Second communication module; 304. Second microcontroller; 305. Second drive circuit; 306. Branch channel switching switch; 307. Electrical connector; 308. Fifth cable socket; 4. Control cable; 401. Power cord; 402. Test line; 403. Communication line; 5. Onboard cable. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 As shown, the equipment includes a main control box 1, several parallel test boxes 2, and several sets of local control components. The main control box 1 is connected to a parallel test box 2 via a control cable 4. Two adjacent parallel test boxes 2 are connected to each other via a control cable 4. Each parallel test box 2 and each set of local control components are selectively connected via a control cable 4. Each set of local control components includes several local control modules 3. The local control modules 3 are plugged into the electrical connectors of the external onboard cables 5.

[0034] Parallel test box 2 is a distributed parallel test box, and local control module 3 is an electrical connector local control module. Control cable 4 includes power line 401, test line 402, and communication line 403.

[0035] like Figure 2 As shown, the main control box 1 includes a control computer 101, a communication board 102, a switching power supply 103, a first cable socket 104, and a power socket 105. The input terminal of the power socket 105 is connected to the mains power and is used to power the equipment. The output terminal of the power socket 105 is connected to one end of the control computer 101 and one end of the switching power supply 103, respectively. The other end of the control computer 101 is connected to the input terminal of the first cable socket 104 via the communication board 102. The other end of the switching power supply 103 is connected to the input terminal of the first cable socket 104. The input terminal of the first cable socket 104 is connected to the communication board 102 and the switching power supply 103 via the communication line 403 and the power line 401, respectively. The output terminal of the first cable socket 104 is connected to the parallel test box 2.

[0036] The control computer 101 is used to analyze the measurement tasks of the resistance and insulation characteristics of the on-machine cable 5. The control computer 101 sends the measurement tasks for the resistance and insulation characteristics of the on-machine cable 5 to the parallel test box 2 through the communication line 403 in the control cable 4. The control computer 101 records the measurement results and generates a test report for the operator to view. The communication board 102 is used for communication transmission between the control computer 101 and the parallel test box 2. The power socket 105 connects the mains power to the main control box 1. Part of the mains power is used by the control computer 101, and the other part is transformed by the switching power supply 103 and then used to power the parallel test box 2 and the local control module 3 through the power line 401 in the control cable 4. The first cable socket 104 is used to connect the control cable 4, connecting the main control box 1 and the test box 2.

[0037] like Figure 3As shown, the parallel test box 2 includes a second cable socket 201, several branch cable sockets 202, a first power module 203, a first communication module 204, a first microcontroller 205, a first drive circuit 206, a region measurement module 207, a main channel switching switch 208, and a third cable socket 209. The output terminal of the first cable socket 104 in the main control box 1 is connected to the input terminal of the second cable socket 201 in the parallel test box 2 via a control cable 4. The output terminal of the second cable socket 201 is connected to the first power module 203, the first communication module 204, and the second cable socket 201 via control cables 4, respectively. The main channel switching switch 208 is connected to the input terminals of each branch cable socket 202 and the input terminal of the third cable socket 209. The first communication module 204 is connected to the first microcontroller 205 and the first drive circuit 206 in sequence, and then connected to the main channel switching switch 208. That is, the first communication module 204 is connected to one end of the first microcontroller 205, the other end of the first microcontroller 205 is connected to one end of the first drive circuit 206, the other end of the first drive circuit 206 is connected to the main channel switching switch 208, and the first communication module 204 is also connected to the input terminals of several branch cable sockets 202. The main channel switching switch 208 is also connected to the input terminals of several branch cable sockets 202, one end of the area measurement module 207, and the input terminal of the third cable socket 209 via the test line 402 in the control cable 4. The other end of the area measurement module 207 is connected to the first microcontroller 205. The output terminal of the branch cable socket 202 is connected to the input terminal of the local control module 3. The output terminal of the third cable socket 209 in one parallel test box 2 is connected to the input terminal of the second cable socket 201 in the next adjacent parallel test box 2. That is, the input terminal of the second cable socket 201 is connected to the output terminal of the first cable socket 104 or the output terminal of the third cable socket 209. Only the second cable socket 201 in the first parallel test box 2 is connected to the first cable socket 104. The second cable socket 201 in subsequent parallel test boxes 2 are all connected to the third cable socket 209 in the previous parallel test box 2. The third cable socket 209 in the last parallel test box 2 is not connected to other parallel test boxes 2.

[0038] The first microcontroller 205 is the control core of the parallel test box 2. The first microcontroller 205 can receive resistance and insulation measurement tasks (i.e., commands to measure the resistance and insulation characteristics of the cable 5 on the measuring machine) issued by the control computer 101 via the first communication module 204, or transmit measurement results back to the control computer 101. The first microcontroller 205 controls the first drive circuit 206 to activate the main channel switching switch 208, allowing the area measurement module 207 to measure the resistance and insulation characteristics of the cable 5 on the measuring machine. The first microcontroller 205 can also store the identification number of the parallel test box 2, such as... Figure 4As shown, the main channel switching switch 208 includes a measurement channel branch switch KA, a measurement channel partition switch KB, and a regional measurement switching switch KC. One end of the measurement channel branch switch KA, one end of the measurement channel partition switch KB, and one end of the regional measurement switching switch KC are respectively connected to the second cable socket, the third cable socket, and the regional measurement module via control cables. The other end of the regional measurement switching switch KC is connected to each branch cable socket via control cables. The other end of the measurement channel branch switch KA is connected to the control cable between the regional measurement switching switch KC and the branch cable socket. The other end of the measurement channel partition switch KB is connected to the control cable between the measurement channel branch switch KA and the second cable socket. The measurement channel partition switch KB can connect or disconnect the measurement channels between the parallel test boxes 2, forming a local measurement channel composed of one or more parallel test boxes 2. The measurement channel branch switch KA is used to control the connection or disconnection of the branch cable socket 202 with the measurement channel. The regional measurement switching switch KC is used to control the connection or disconnection of the regional measurement module 207 with the measurement channel.

[0039] like Figure 5As shown, the local control module 3 includes a fourth cable socket 301, a second power module 302, a second communication module 303, a second microcontroller 304, a second drive circuit 305, a branch channel switching switch 306, an electrical connector 307, and a fifth cable socket 308. The input terminal of the fourth cable socket 301 is connected to the output terminal of the branch cable socket 202 in the parallel test box 2 via the control cable 4, or to the output terminal of the fifth cable socket 308 in the previous adjacent local control module 3 in the same group of local control components. Within the same local control module 3... The output terminal of the fourth cable socket 301 and the input terminal of the fifth cable socket 308 are connected via power line 401, test line 402, and communication line 403 in the control cable 4. The output terminal of the fourth cable socket 301 is connected to one end of the second power module 302, one end of the second communication module 303, and one end of the branch channel switching switch 306 via power line 401, communication line 403, and test line 402 in the control cable 4. The input terminal of the fifth cable socket 308 is connected to the second power module 302, one end of the second communication module 303, and one end of the branch channel switching switch 306 via power line 401, communication line 403, and test line 402 in the control cable 4. One end of the source module 302 and the second communication module 303 is connected to the branch channel switching switch 306. The other end of the second communication module 303 is sequentially connected to the second microcontroller 304 and the second drive circuit 305, and then connected to the branch channel switching switch 306. That is, the other end of the second communication module 303 is connected to the second microcontroller 304. The second microcontroller 304 is connected to the second drive circuit 305. The second drive circuit 305 is connected to the branch channel switching switch 306. The branch channel switching switch 306 is also connected to the electrical connector 307. The electrical connector 307 is connected to the machine... The electrical connectors of the upper cable 5 are plugged in and out. Each parallel test box 2 and each group of local control components are selectively connected through the control cable 4. That is, several local control modules 3 in the same group of local control components are selectively connected to several branch cable sockets 202 in the same parallel test box 2. The fifth cable socket 308 may not be connected to the parallel test box 2 or another local control module 3. The fourth cable socket 301 is connected to the branch cable socket 202 in the parallel test box 2 or to the fifth cable socket 308 in another local control module 3 in the same group of local control components.

[0040] The second microcontroller 304 is the control core of the local control module 3. The second microcontroller 304 can store identification numbers to distinguish different local control modules 3 with the same appearance and function. The second microcontroller 304 can also control the second drive circuit 305 to activate the branch channel switching switch 306 according to commands received from the control computer 101 by the second communication module 303. The branch channel switching switch 306 introduces the onboard cable 5, which is connected to the electrical connector 307, into the measurement channel. The electrical connector 307 of the local control module 3 uniquely connects to the electrical connector (i.e., the plug of the onboard cable 5) of the tested onboard cable 5. The measurement points T1 to Tn of the electrical connector 307 can be directly connected to the pins of the electrical connector of the onboard cable 5 without the need for an adapter cable.

[0041] like Figure 6 and Figure 7 As shown, the branch channel switching switch 306 includes a first measurement channel selection switch KE, a second measurement channel selection switch KF, a third measurement channel selection switch KG, a fourth measurement channel selection switch KH, a first polarity selection switch KX, and a second polarity selection switch KY. One end of the first measurement channel selection switch KE, one end of the second measurement channel selection switch KF, one end of the third measurement channel selection switch KG, and one end of the fourth measurement channel selection switch KH are all connected to the control cable between the fourth cable socket and the fifth cable socket. The other end of the first measurement channel selection switch KE and the other end of the second measurement channel selection switch KF are both connected to one end of the first polarity selection switch KX. The other end of the third measurement channel selection switch KG and the other end of the fourth measurement channel selection switch KH are both connected to one end of the second polarity selection switch KY. The other end of the first polarity selection switch KX and the other end of the second polarity selection switch KY are both connected to an electrical connector. The first measurement channel selection switch KE and the second measurement channel selection switch KF can select and connect the measurement channel's "INPUT+" and "SENSE+" to node X; the third measurement channel selection switch KG and the fourth measurement channel selection switch KH can select and connect the measurement channel's "INPUT-" and "SENSE-" to node Y. Each first polarity selection switch KX and second polarity selection switch KY forms a pair, and each pair of first polarity selection switches KX and second polarity selection switches KY can connect node X or node Y to measurement points T1 to Tn. The distance between nodes X and Y and measurement points T1 to Tn is the internal wiring of the branch channel switching switch 306, which is very short, and the line resistance R2 can be ignored; according to the four-wire resistance measurement principle, the line resistance R1 of the measurement channel from nodes X and Y to the area measurement module 207 can also be canceled out. The resistance value measured by the area measurement module 207 can be used as the true value of the cable 5 on the tested machine, unaffected by the resistance of the adapter cable and control cable 4.

[0042] Each onboard cable 5 has several ports, and each port of the onboard cable 5 is selectively connected to an electrical connector 307 in each local control module 3.

[0043] The output terminal of the first cable socket 104 and the input terminal of the second cable socket 201 are connected via a power line 401, a test line 402, and a communication line 403. The output terminal of the second cable socket 201 is connected via the power line 401 to the input terminals of each branch cable socket 202, the first power module 203, and the third cable socket. The output terminal of the second cable socket 201 is connected via the communication line 403 to the input terminals of the first communication module 204 and the third cable socket 209. The output terminal of the second cable socket 201 is connected via the test line 402 to the main channel switching switch 208. The main channel switching switch 208 is also connected via the test line 402 to the input terminals of several branch cable sockets 202, one end of the area measurement module 207, and the input terminal of the third cable socket 209. The input terminal of the fourth cable socket 301 is connected to the output terminal of the branch cable socket 202 via power line 401, test line 402 and communication line 403 or to the output terminal of the fifth cable socket 308 in the previous local control module 3 in the same group of local control components. The fourth cable socket 301 and the fifth cable socket 308 in the same local control module 3 are connected to each other via power line 401, test line 402 and communication line 403. The output terminal of the fourth cable socket 301 is connected to the second power module 302, the second communication module 303 and the branch channel switching switch 306 via power line 401, communication line 403 and test line 402 respectively.

[0044] Control cable 4 is used to connect the main control box 1, the parallel test box 2, and the local control module 3. Both ends of control cable 4 are equipped with plugs of the same specification and wiring sequence, providing universal compatibility with the first cable socket 104 on the main control box 1, the second control cable socket 201, the third cable socket 209, the branch cable socket 202 on the parallel test box 2, and the cable sockets 301 and 308 on the local control module 3. Power cable 401 is used to supply power to the parallel test box 2 and the local control module 3. Test lines 402 correspond to the four-wire methods "INPUT+", "SENSE+", "INPUT-", and "SENSE-", respectively. Communication line 403 can be CAN, RS-485, or Ethernet bus, and is used for communication between the main control box 1, the parallel test box 2, and the local control module 3.

[0045] During the manufacturing process of the device of this invention, each local control module 3 and each parallel test box 2 is written with its own corresponding identification number. This identification number is unique and is retained even when power is off. The identification number allows for the identification and differentiation of structurally identical local control modules 3, and the unique mating relationship between the electrical connectors binding the local control modules 3 and the aircraft cables 5. The aircraft has several measurement areas, each containing several parallel test boxes 2 and several sets of local control components. Parallel test boxes 2 within the same measurement area are connected to the local control components. The identification number also distinguishes structurally identical parallel test boxes 2, binding each parallel test box 2 to the measurement area.

[0046] like Figure 1 The diagram illustrates one layout of the equipment. Parallel test boxes BX1 to BX3 belong to three measurement areas. Local control modules AX1 to AX7 are connected to the parallel test boxes BX1 to BX3 in each measurement area via control cable 4. Onboard cable DL1 belongs to two measurement areas, and its connector is connected to the local control modules AX1 to AX3 in different measurement areas. Onboard cable DL2 belongs to the same measurement area and is connected to the local control modules AX4 to AX5 in the same measurement area. Onboard cable DL3 belongs to the same measurement area and is connected to the local control modules AX6 to AX7 in the same measurement area. Local control modules AX1 and AX2 are connected by control cable 4 to form a local control assembly (i.e., a local control module 3 branch). The local control module AX1 of this assembly is connected to the parallel test box BX1 via control cable 4. Similarly, local control modules AX3 to AX5 are connected by control cable 4 to form a local control assembly, which is then connected to the parallel test box BX2. Connect local control modules AX6 to AX7 using control cable 4 to form a set of local control components, then connect them to parallel test box BX3. When more measurement areas and cables 5 on the device under test need to be measured, the number of parallel test boxes 2 and local control modules 3 can be increased accordingly. Connect the additional parallel test boxes 2 sequentially using control cable 4 to form a link and connect it to the main control box 1. Multiple branch cable sockets 202 of each parallel test box 2 can be extended with control cable 4 to connect multiple sets of local control components of different lengths (i.e., multiple branches of local control module 3).

[0047] The specific procedure for measuring cable 5 on the machine using the equipment is as follows:

[0048] like Figures 1 to 9Connect the local control module 3 to the electrical connector of the onboard cable 5 according to a unique correspondence. Connect the local control modules 3 to their fourth control cable socket 301 using control cable 4 to form a local control assembly. Insert one end of control cable 4 into the branch cable socket 202 of the parallel test box 2; insert the other end into the fourth control cable socket 301 of the first local control module 3 in the local control assembly, connecting the local control module 3 to the parallel test box 2. Connect control cable 4 from the first cable socket 104 of the main control box 1 to the second cable socket 201 of the parallel test box 2, from the third cable socket 209 of the parallel test box 2 to the second cable socket 201 of the next parallel test box 2, and so on, forming a distributed parallel test box link connected to the main control box 1.

[0049] After the hardware connection of the distributed parallel rapid testing equipment for all cables is completed, the equipment network is first initialized: the control computer 101 of the main control box 1 obtains the identification numbers of each parallel test box 2 and its connected local control module 3, and generates a device network table, that is, it clarifies the number and identification numbers of the parallel test boxes 2 connected to the main control box 1 and the number and identification numbers of the local control modules 3 connected to each parallel test box 2. According to the device network table, combined with the known continuity relationship table of the on-board cables 5 and the correspondence table between the on-board cables 5 and the local control modules 3, the control computer 101 divides the measurement tasks of the resistance and insulation characteristics of the on-board cables 5 into partitioned parallel measurement tasks and centralized measurement tasks.

[0050] A zoned parallel measurement task is a measurement of the resistance and insulation of the onboard cable 5 completed within a single parallel test box 2 and its connected local control module 3; a centralized measurement task is a measurement of the resistance and insulation of the onboard cable 5 across measurement areas, requiring the cooperation of two or more parallel test boxes 2 and their connected local control modules 3. For example... Figure 4 The difference between zoned parallel measurement and centralized measurement lies in the following: During zoned parallel measurement, the measurement channel branch switch KA and the measurement channel zone switch KB of the parallel test box 2 are disconnected, meaning the measurement channels between the parallel test boxes 2 are disconnected, and the area measurement modules 207 of each parallel test box 2 measure the resistance and insulation characteristics of the on-board cables 5 in parallel. During centralized measurement, the measurement channel branch switch KA and the measurement channel zone switch KB are connected, meaning the measurement channels between all the parallel test boxes 2 are connected together, and the area measurement module 207 of one of the parallel test boxes 2 centrally measures the resistance and insulation characteristics of the on-board cables 5 across the measurement area.

[0051] Then, each parallel test box 2 performs partitioned parallel measurements. The control computer 101 sends the partitioned parallel measurement task to each parallel test box 2, and each parallel test box 2 simultaneously measures its connected onboard cable 5. For example... Figure 8The A1-B1 conductors of the onboard cable DL3 are conductive and belong to the same measurement area. Their two ends are respectively connected to measurement points T1 of local control module AX6 and local control module AX7. Both local control modules AX6 and AX7 are connected to the parallel test box BX3. The measurement channel branch switch KA of the parallel test box BX3 is open, the measurement channel partition switch KB is open, and the area measurement switch KC is closed, connecting the area measurement module 207 to the measurement channel. The first measurement channel selection switch KE and the second measurement channel selection switch KF of the local control module AX6 are closed, connecting the "INPUT+" and "SENSE+" of the measurement channel to node X; the first polarity selection switch KX1 is closed, connecting node X to measurement point T1. The third measurement channel selection switch KG and the fourth measurement channel selection switch KH of the local control module AX7 are turned on, connecting the "INPUT-" and "SENSE-" of the measurement channel to node Y; the second polarity selection switch KY1 is turned on, connecting node Y to measurement point T1.

[0052] After the measurement channel is established, the resistance characteristics of conductors A1-B1 of cable DL3 on the area measurement module 207 are measured. Each parallel test box 2 returns the measurement results to the test computer 101 for processing and temporary storage.

[0053] Next, centralized measurement is performed. The control computer 101 sends the centralized measurement task to the parallel test box 2, designating one area measurement module 207 of the parallel test box 2 to connect to the measurement channel. The other parallel test boxes 2 cooperate to switch measurement channels, realizing centralized measurement of the resistance and insulation of the on-board cable 5 across the parallel test boxes 2, that is, across the measurement area. Figure 9 The C2-E2 conductors of the onboard cable DL1 are connected and belong to two measurement areas. Their two ends are respectively connected to the measurement point T2 of the local control module AX1 and the measurement point T2 of the local control module AX3. The local control module AX1 is connected to the parallel test box BX1. The local control module AX3 is connected to the parallel test box BX2.

[0054] In parallel test box BX2, the measurement channel branch switch KA is turned on, the measurement channel partition switch KB is turned on, and the area measurement switch KC is turned on. In local control module AX3, the first measurement channel selection switch KE and the second measurement channel selection switch KF are turned on, connecting the "INPUT+" and "SENSE+" of the measurement channel to node X; the first polarity selection switch KX2 is turned on, connecting node X to measurement point T2. In parallel test box BX1, the measurement channel branch switch KA is turned on, the measurement channel partition switch KB is turned off, and the area measurement switch KC is turned off; in electrical connector local control module AX1, the third measurement channel selection switch KG and the fourth measurement channel selection switch KH are turned on, connecting the "INPUT-" and "SENSE-" of the measurement channel to node Y; the second polarity selection switch KY2 is turned on, connecting node Y to measurement point T2.

[0055] After the measurement channel is established, the resistance characteristics of the C2-E2 conductors of the on-board cable DL1 are centrally measured by the area measurement module 207 of the parallel test box BX2. Finally, the measurement results of the parallel and centralized measurements are analyzed and processed by the control computer 101 to generate a measurement report for the on-board cable 5, which is available for the operator to review, thus completing the measurement task of the on-board cable 5.

[0056] This invention uses a main channel switching switch 208 to switch the measurement channels between parallel test boxes, thereby forming local measurement channels composed of one or more parallel test boxes. This rationally divides the aircraft measurement area to achieve parallel measurement of multiple measurement areas, significantly shortening the measurement time for resistance and insulation characteristics. Furthermore, it eliminates the need for adapter cables to connect the aircraft cable testing equipment to the onboard cables. The local control module 3 selects "INPUT+" and "SENSE+" or "INPUT-" and "SENSE-" via a branch channel switching switch 306 to connect to measurement points T1-Tn on the electrical connector. Measurement points T1-Tn are directly connected to the onboard cables 5, making the four-wire method measurement points closer to the onboard cables and avoiding resistance measurement errors caused by adapter cables of different lengths.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of patent protection of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, whether directly or indirectly applied to other related technical fields, are similarly included within the scope of protection of the present invention.

Claims

1. A distributed parallel rapid testing device for all machine cables, characterized in that: It includes a main control box (1), several parallel test boxes (2) and several sets of local control components. The main control box (1) is connected to a parallel test box (2) via a control cable (4). Two adjacent parallel test boxes (2) are connected to each other via a control cable (4). Each parallel test box (2) and each set of local control components are selectively connected via a control cable (4). Each set of local control components includes several local control modules (3). The local control modules (3) are connected to external onboard cables (5). The parallel test box (2) includes a second cable socket (201), several branch cable sockets (202), a first power module (203), a first communication module (204), a first microcontroller (205), a first drive circuit (206), a region measurement module (207), a main channel switching switch (208), and a third cable socket (209). The output end of the first cable socket (104) in the main control box (1) is connected to the input end of the second cable socket (201) in the parallel test box (2) via a control cable (4). The output end of the second cable socket (201) is connected to the input ends of the first power module (203), the first communication module (204), the main channel switching switch (208), the third cable socket (209), and several branch cable sockets (202), respectively. (204) is connected to the main channel switching switch (208) after passing through the first microcontroller (205) and the first drive circuit (206) in sequence. The first communication module (204) is also connected to the input terminals of several branch cable sockets (202) respectively. The main channel switching switch (208) is also connected to the input terminals of several branch cable sockets (202), one end of the area measurement module (207) and the input terminal of the third cable socket (209) respectively through the control cable (4). The other end of the area measurement module (207) is connected to the first microcontroller (205). The output terminal of the branch cable socket (202) is connected to the input terminal of the local control module (3). The output terminal of the third cable socket (209) in a parallel test box (2) is connected to the input terminal of the second cable socket (201) in the next adjacent parallel test box (2). The main channel switching switch (208) includes a measurement channel branch switch KA, a measurement channel partition switch KB, and a regional measurement switching switch KC. One end of the measurement channel branch switch KA, one end of the measurement channel partition switch KB, and one end of the regional measurement switching switch KC are respectively connected to the second cable socket (201), the third cable socket (209), and the regional measurement module (207) via control cables (4). The other end of the regional measurement switching switch KC is connected to each branch cable socket (202) via control cables (4). The other end of the measurement channel branch switch KA is connected to the control cable (4) between the regional measurement switching switch KC and the branch cable socket (202). The other end of the measurement channel partition switch KB is connected to the control cable (4) between the measurement channel branch switch KA and the second cable socket (201). The measurement channel partition switch KB can connect or disconnect the measurement channels between parallel test boxes, forming a local measurement channel composed of one or more parallel test boxes and their subordinate local control components; the branch switch KA is used to control the branch cable socket to disconnect or connect with the measurement channel; the area measurement switching switch KC is used to control the area measurement module to connect or disconnect with the measurement channel. The local control module (3) includes a fourth cable socket (301), a second power module (302), a second communication module (303), a second microcontroller (304), a second drive circuit (305), a branch channel switching switch (306), an electrical connector (307), and a fifth cable socket (308). The input end of the fourth cable socket (301) is connected to the output end of the branch cable socket (202) via a control cable (4) or to the output end of the fifth cable socket (308) in the previous local control module (3) in the same group of local control components. The fourth cable socket (301) and the fifth cable socket (308) in the same local control module (3) are connected to each other via a control cable (4). The output end of the fourth cable socket (301) is connected to one end of the second power module (302), the second communication module (303) and the branch channel switching switch (306) respectively via the control cable (4). The input end of the fifth cable socket (308) is connected to one end of the second power module (302), the second communication module (303) and the branch channel switching switch (306) respectively via the control cable (4). The other end of the second communication module (303) is connected to the branch channel switching switch (306) after passing through the second microcontroller (304) and the second drive circuit (305). The branch channel switching switch (306) is also connected to the electrical connector (307). The electrical connector (307) is connected to the onboard cable (5). The branch channel switching switch (306) includes a first measurement channel selection switch KE, a second measurement channel selection switch KF, a third measurement channel selection switch KG, a fourth measurement channel selection switch KH, a first polarity selection switch KX, and a second polarity selection switch KY. One end of the first measurement channel selection switch KE, one end of the second measurement channel selection switch KF, one end of the third measurement channel selection switch KG, and one end of the fourth measurement channel selection switch KH are all connected to the control cable (4) between the fourth cable socket (301) and the fifth cable socket (308). That is, the fourth cable socket (301) and the fifth cable socket (308) in the same electrical connector module are connected through test lines. One end of the first measurement channel selection switch KE, one end of the second measurement channel selection switch KF, one end of the third measurement channel selection switch KG, and one end of the fourth measurement channel selection switch KH are respectively connected to the "INPUT+" and "S" of the test line between the fourth cable socket (301) and the fifth cable socket (308). On ENSE+”, INPUT-” and SENSE-”; the other end of the first measurement channel selection switch KE and the other end of the second measurement channel selection switch KF are both connected to one end of the first polarity selection switch KX, the other end of the third measurement channel selection switch KG and the other end of the fourth measurement channel selection switch KH are both connected to one end of the second polarity selection switch KY, the other end of the first polarity selection switch KX and the other end of the second polarity selection switch KY are both connected to the electrical connector (307), that is, the path after the other end of the first measurement channel selection switch KE and the other end of the second measurement channel selection switch KF are respectively connected to one end of several first polarity selection switches KX, the path after the other end of the third measurement channel selection switch KG and the fourth measurement channel selection switch KH are respectively connected to one end of several second polarity selection switches KY, and the other end of each first polarity selection switch KX and the other end of each second polarity selection switch KY are connected to each measurement point T1~Tn of the electrical connector.

2. The distributed parallel rapid testing device for all-machine cables according to claim 1, characterized in that: The main control box (1) includes a control computer (101), a communication board (102), a switching power supply (103), a first cable socket (104), and a power socket (105). The input end of the power socket (105) is connected to the mains power, and the output end of the power socket (105) is connected to one end of the control computer (101) and one end of the switching power supply (103). The other end of the control computer (101) is connected to the input end of the first cable socket (104) via the communication board (102). The other end of the switching power supply (103) is connected to the input end of the first cable socket (104). The output end of the first cable socket (104) is connected to the parallel test box (2).

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