Preparation method of multi-channel testing device

Abstract

The present invention provides a method for preparing a multi-channel test device, including: clarifying the load requirements of the product to be tested during the test, determining the type and number of input interfaces required on the input panel of the adapter box, and matching the product output signal; selecting the type and interface of the appropriate output cable conductor; planning the number and layout of the input interfaces on the adapter box, selecting relays or mechanical switches as the product switching method, and designing the mechanical switch layout and routing within the adapter box; determining the interface distribution, framework, and size of the input and output panel of the adapter box based on the internal routing, switch layout, and output interfaces; and drawing machining drawings accordingly to realize the production of the adapter box. The present invention effectively expands the input capacity of expensive LCR testers through the adapter box, meets the needs of testing a large number of sensors, improves test efficiency and accuracy, reduces operational difficulty and the risk of misoperation, simplifies complex wiring into switch operations, and greatly optimizes the test process.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic manufacturing, and in particular to a method for preparing a multi-channel testing device. Background Art

[0002] The existing test process of a certain type of sensor in the launch field is usually a single test. However, with the vigorous development of my country's aerospace industry, the order volume in the field of spacecraft production and manufacturing has also increased rapidly, which is reflected in the production of batches and large-scale production. In this context, improving the test efficiency and accuracy during the test process is of great significance to improving production efficiency and reducing enterprise costs.

[0003] In the patent document with the announcement number CN215641501U, a multi-channel adapter device for high resistance testing is disclosed. The multi-channel adapter device is used to connect the resistance measuring device and the sample to be tested. The multi-channel adapter device includes a box body, and the two side walls of the box body are respectively provided with a coaxial plug and an interface. The coaxial plug and the interface are connected in the box body through a wire, the coaxial plug is externally connected to the sample to be tested, and the interface is externally connected to the resistance measuring device. At present, it is necessary to adapt to the times. The test method corresponding to the batch production of products in the current carrier field also needs to be changed to meet the needs of the rapid development of the aerospace industry. In the past, a single test sensor needed to frequently switch products during the test process, and it was also necessary to connect, disconnect, and connect the shielding layer of the multiple lead wires of the sensor. In the actual operation process, facing a large number of sensors, very cumbersome operations need to be performed, so it is necessary to design and invent a device that can reduce the sensor wiring operation. Summary of the Invention

[0004] In view of the defects in the prior art, the present invention aims to provide a multi-channel testing method for use in a test process.

[0005] A method for preparing a multi-channel testing device according to the present invention comprises the following steps:

[0006] Step S1: Determine the load quantity a of the product to be tested during the test;

[0007] Step S2: Determine the type and number of input interfaces on the input panel of the test adapter box corresponding to the product to be tested based on the type and number of output signals of the product to be tested;

[0008] Step S3: Determine the type of conductor used in the matching output cable and the interface type corresponding to the output end of the product under test and the input end of the test adapter box according to the output port, output signal type, and number of output channels of the product under test;

[0009] Step S4: Determine the number and position arrangement of the corresponding input interfaces on the test adapter box based on the load quantity a of the product to be tested determined in steps S1, S2, and S3, the input interface on the input panel of the test adapter box, the corresponding wire type of the output cable, and the interface type that matches the product to be tested and the input end of the test adapter box;

[0010] Step S5: determining a method for switching between different products of the same type during the test process according to the type and number of input interfaces on the test adapter box determined in step S4;

[0011] Step S6: Based on the mechanical switch determined in step S5 as the action input for switching the product under test and the number and position arrangement of the input interfaces determined in step S4, the arrangement of the mechanical switches of the test adapter box is determined, and the internal wiring method of the test adapter box connected to the mechanical switch box sensor input interface is determined;

[0012] Step S7: Based on the internal wiring method, mechanical switch arrangement, output interface on the output panel of the test adapter box, and input port of the LCR meter determined in step S6, the input panel and output panel of the entire test adapter box and the corresponding interface distribution thereon are determined, and the frame and size of the entire test adapter box are determined;

[0013] Step S8: Based on the test adapter box frame, dimensions, port distribution on the input panel and output panel, and wiring pattern determined in step S7, corresponding machining drawings are drawn to produce the test adapter box.

[0014] Preferably, in step S1, the method for determining the number of loads a of the product to be tested during the test process is:

[0015] The total number of sensors in the order task is Y and the effective production time is T, the time required for a single test process is t, the number of tests is x=T / t, and the number of products to be tested is a=Y / x=Y·t / T.

[0016] Preferably, in step S2, the specific method for determining the type and number of input interfaces corresponding to the product to be tested on the input panel of the test adapter box according to the type and number of output signals of the product to be tested is:

[0017] Determine the number b of wires connected to the input panel of the test adapter box for a single sensor. Combined with the number of loads a = Y / x = Y t / T of the product under test determined in step S1, determine the number of interfaces on the input panel of the test adapter box to be Z = a · b = b · Y · t / T.

[0018] The interface type is determined to be a BNC socket connected to the RF cable based on the output capacitance signal of the sensor. The number and distribution of the BNC sockets on the input panel are determined.

[0019] Preferably, in step S3, according to whether the end of the sensor lead wire is a stripped loose wire or a crimped coaxial contact, the specifications of the BNC plug of the adapter cable connecting the sensor to the test adapter box and the coaxial jack or alligator clip connected to the sensor are confirmed;

[0020] At the same time, according to the load quantity of the product to be tested a=Y / x=Y·t / T during the test process, the number of adapter cables required is determined.

[0021] Preferably, in step S4, according to the load quantity a of the product to be tested determined in steps S1, S2, and S3, the input interface on the input panel of the test adapter box, the wire type corresponding to the output cable, and the interface type matching the product to be tested and the input end of the test adapter box, the specific method for determining the number and position arrangement of the corresponding input interfaces on the test adapter box is:

[0022] Based on the selected BNC socket, confirm the size of the holes opened on the input panel of the test adapter box and the distance between the holes.

[0023] Preferably, in step S5, according to the type and number of input interfaces on the test adapter box determined in step S4, the specific method for determining the method for switching between different products of the same type during the test process is:

[0024] If the input response of the product to be tested is instantaneous, use a mechanical toggle switch;

[0025] If it is an automatically switched sensor, a relay is used and the on and off time of the relay is determined according to the response time of the product to be tested from input to output to the LCR tester.

[0026] Preferably, in step S6 and step S7, the internal wiring mode of the test adapter box and the distribution of the mechanical toggle switches on the upper panel are determined according to the factors determined in step S1 to step S5.

[0027] Preferably, in step S8, corresponding machining drawings and assembly drawings are drawn according to the hole position distribution of the input panel, upper panel and output panel determined in the previous steps, and the test adapter box is produced.

[0028] Preferably, the test adapter box, LCR tester, sensor, adapter cable, and output cable constitute a multi-channel test device;

[0029] The test adapter box is connected to the LCR meter via an adapter cable, and the test adapter box serves as a terminal for the sensor capacitance output;

[0030] The sensor, as a product to be tested, is connected to the input end of the test adapter box via an output cable.

[0031] Preferably, the uniqueness of the input terminal of the LCR tester is amplified to the load quantity a required during the sensor test process through the test adapter box;

[0032] The output line of the capacitance signal output by the sensor and the input interface of the corresponding test adapter box both have ground terminals;

[0033] The sensor output has three channels, each of which requires two output ports. The test adapter box has six ports for each sensor during the test. The number of ports on the input panel of the test adapter box is 6X, where X is the number of sensors in each test.

[0034] During the sensor test, the sensor product can be switched according to the data recorded by the LCR tester. The sensor output capacitance can be freely selected to be tested at a preset time point or during a preset time period. Any product to be tested can be selected for testing or monitoring.

[0035] Determine the distribution of mechanical switches on the top panel of the test adapter box based on the number of ports (6X) on the input panel.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. This invention uses a test adapter box to amplify the input capacity of expensive LCR testers to accommodate the number of sensors required in actual production processes, thereby significantly improving test efficiency and accuracy, reducing the possibility of operator error, and simplifying operation difficulty by simplifying complex wiring operations to simply switching on a switch.

[0038] 2. The present invention transforms the originally cumbersome operations of wiring, disconnecting, connecting the shield layer, and switching into simple switch toggle operations, greatly simplifying the test process and improving work efficiency;

[0039] 3. In the batch production process of the present invention, since the number of sensors that can be loaded at a time increases, the number of tests and time required are reduced accordingly, thereby greatly saving product testing expenses and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0041] Figure 1 It is a structural diagram of a multi-channel test device;

[0042] Figure 2 Schematic diagram of the steps of the preparation method of the multi-channel test device.

[0043] The figure shows:

[0044] Test adapter box 1; LCR meter 2; sensor 3; adapter cable 4; output cable 5. DETAILED DESCRIPTION

[0045] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0046] Example 1

[0047] Reference Figure 1 and Figure 2 According to the present invention, a multi-channel testing method for use in a test process comprises the following steps:

[0048] Step S1: Determine the number of products a that need to be carried during the test process; the method for determining the number of products a that need to be carried during the test process is: the total number of sensors Y and the effective production time T in the order task, the time t required for a single test process, the number of tests x=T / t, and the number of products carried during the test process a=Y / x=Y·t / T.

[0049] Step S2: Determine the type and number of input interfaces corresponding to the product required on the input panel of the adapter box based on the output signal type and quantity of the product to be tested; the specific method for determining the type and number of input interfaces corresponding to the product required on the input panel of the adapter box based on the output signal type and quantity of the product to be tested is as follows: determine the number b of wires that a single sensor needs to be connected to the input panel of the test adapter box, and determine the number of interfaces on the input panel of the test adapter box as Z=a·b=b·Y·t / T based on the product load number a=Y / x=Y·t / T determined in the test process in step S1; determine the interface type as a BNC socket that connects to the RF cable based on the sensor output capacitance signal, and determine the number and distribution of the BNC sockets on the input panel.

[0050] Step S3: Determine the wire type used for the required specially matched output cable and the interface type of the corresponding product output terminal and the adapter box input terminal based on the product output port, output signal type and number of output channels; confirm the BNC plug specifications of the adapter cable connecting the sensor to the test adapter box and the coaxial jack or alligator clip connected to the sensor based on whether the end of the sensor lead wire is a stripped loose wire or a crimped coaxial contact; at the same time, confirm the number of adapter cables required based on the product load quantity a=Y / x=Y·t / T during the test process.

[0051] Step S4: Determine the number and positional arrangement of the corresponding input interfaces required on the test adapter box according to the product carrying quantity a, the input interface on the adapter box input panel, the corresponding wire type of the output cable, and the interface type of the matching product and the input end of the adapter box determined in steps S1, S2, and S3; The specific method for determining the number and positional arrangement of the corresponding input interfaces required on the test adapter box according to the product carrying quantity a, the input interface on the adapter box input panel, the corresponding wire type of the output cable, and the interface type of the matching product and the input end of the adapter box is: confirm the size of the holes that need to be opened on the input panel of the test adapter box and the distance between the holes according to the selected BNC socket.

[0052] Step S5: Determine the method of switching different products of the same type during product testing based on the type and number of input interfaces on the test adapter box determined in step S4; Determine the method of switching different products of the same type during product testing based on the type and number of input interfaces on the test adapter box determined in step S4, wherein the specific method of selecting a relay or a mechanical switch is: if the product input response is instantaneous and does not require a long time to charge to balance, use a mechanical toggle switch, and only manual testing can be performed at the same time; if automatic switching of sensors is required, consider using a relay. When using a relay, it is necessary to consider the response time of the product from input to output to the LCR tester to determine the on-off time of the relay.

[0053] Step S6: Based on the mechanical switch determined in step S5 as the action input of the switching product and the number and position arrangement of the input interfaces determined in step S4, the layout of the mechanical switch of the test adapter box can be determined, and the internal wiring method of the adapter box connected to the mechanical switch box sensor input interface can be determined;

[0054] Step S7: Determine the input panel, output panel and corresponding specific interface distribution of the entire test adapter box based on the internal wiring method, mechanical switch arrangement and the output interface on the output panel of the test adapter box determined by the input port of the LCR tester according to the internal wiring method, mechanical switch arrangement and the output interface on the output panel of the test adapter box, and determine the frame and size of the entire test adapter box; determine the internal wiring method of the test adapter box and the distribution of the mechanical toggle switches on the upper panel based on the factors determined in steps S1 to S5.

[0055] Step S8: Draw the corresponding machining drawings based on the test adapter box frame, size, specific port distribution on the input and output panels, and wiring method determined in step S7, and then produce the test adapter box. Preferably, in step S1, the method for determining the number of products a carried during the test process is: the total number of sensors Y and the effective production time T in the order task, the time t required for a single test process, the number of tests x=T / t, and the number of products carried during the test process a=Y / x=Y·t / T. Draw the corresponding machining drawings and assembly drawings based on the previously confirmed hole position distribution of the input panel, upper panel, and output panel, and finally produce the test adapter box and put it into use.

[0056] A test adapter box, an LCR meter, a sensor, an adapter cable, and an output cable constitute a multi-channel test device used in the test process; the test adapter box is connected to the LCR meter via an adapter cable, and the test adapter box serves as the terminal for the sensor capacitance output; the sensor, as the tested product, is connected to the input end of the test adapter box via an output cable.

[0057] The test adapter box amplifies the uniqueness of the LCR meter input to the required load capacity a during sensor testing. The sensor's capacitance signal requires a specific high-frequency output line, and the corresponding test adapter box input interface must both have a ground terminal. The sensor output has three channels, each requiring two output ports. This means the test adapter box requires six ports per sensor during testing. The number of ports on the test adapter box's input panel is 6X, where X is the number of sensors required to be simultaneously loaded a during each test. The internal wiring pattern is also determined. During the sensor test, sensor products are switched based on the LCR meter's data recording. The sensor output capacitance can be tested at a specific time or within a specific time period, allowing for the selection of a specific product within the current batch for testing or monitoring. The distribution of mechanical switches on the test adapter box's top panel is determined based on the number of ports on the input panel (6X). The LCR meter calibration method and test frequency must be determined during sensor capacitance testing. The internal wiring pattern should be determined based on the number of ports on the test adapter box's input panel and the type of signal being transmitted, determining the wire type and shield grounding point.

[0058] Example 2

[0059] Those skilled in the art may understand this embodiment as a more specific description of Embodiment 1.

[0060] This embodiment provides a multi-channel test device used in a test process, including: a test adapter box 1, an LCR tester 2, a sensor 3, a transfer cable 4, and an output cable 5.

[0061] Test adapter box 1: connected to LCR meter 2 via adapter cable 4, serving as a terminal for capacitance output of sensor 3.

[0062] Sensor 3: as the product under test, is connected to the input end of the test adapter box through the output cable 5.

[0063] The test adapter box 1 amplifies the uniqueness of the input end of the LCR meter 2 to the load number a required during the sensor 3 test process, thereby improving the utilization rate of expensive equipment without affecting the accuracy of the test results, improving test efficiency while reducing costs, and also providing great convenience for operators. The capacitance signal output by the sensor 3 requires the use of a specific high-frequency output line and the corresponding test adapter box 1 input interface must both have a ground terminal to stably transmit the capacitance signal. The number of output channels of the sensor 3 is 3, and each channel requires 2 output ports. This determines that each sensor 3 requires 6 ports during the test process required by the test adapter box 1. This determines the number of ports on the input panel of the test adapter box 1 to be 6X (X is the number of sensors 3 required to be loaded simultaneously a during each test process), and also determines its internal wiring method. During the sensor 3 test process, the sensor 3 product is switched according to the data recorded by the LCR meter 2. The sensor 3 output capacitance value can be tested at a certain time point or during a specific time period. At the same time, a product in the batch of test products to be tested can be freely selected for testing or monitoring. Determine the distribution of mechanical switches on the top plate of the test adapter box based on the number of ports 6X on the input panel; when LCR meter 2 is testing the capacitance of sensor 3, it is necessary to determine the calibration method and test frequency of LCR meter 2; the internal wiring method should determine the selected wire type and the grounding point of its wire shield layer based on the number of ports on the input panel of test adapter box 1 and the type of signal being transmitted.

[0064] The present invention provides a multi-channel testing method used in a test process, the method using the multi-channel testing device used in the test process, the method comprising the following steps:

[0065] Step S1, determine the number of products that need to be loaded during the test process; Step S2: determine the type and number of input interfaces corresponding to the products required on the input panel of the adapter box according to the output signal type and quantity of the products to be tested; Step S3, determine the wire type used for the required specially matched output cable and the interface type of the corresponding product output end and the adapter box input end according to the product output port, output signal type and number of output channels; Step S4, determine the number and position arrangement of the corresponding input interfaces required on the test adapter box 1 according to the product loading quantity a, the input interface on the adapter box input panel, the corresponding wire type of the output cable and the interface type of the matching product and the adapter box input end determined in steps S1, S2 and S3; Step S5, determine the method of switching different products of the same type during the product test according to the type and number of input interfaces on the test adapter box 1 determined in step S4, among which relays or mechanical switches can be selected. A mechanical switch can be selected for sensor 3; in step S6, the arrangement of the mechanical switch of the test adapter box can be determined based on the mechanical switch determined in step S5 as the action input of the switching product and the number and position arrangement of the input interface determined in S4, and the internal wiring method of the adapter box connected to the input interface of the mechanical switch box sensor 3 can be determined accordingly; in step S7, the input panel, output panel and the corresponding specific interface distribution of the entire test adapter box 1 can be determined based on the internal wiring method, mechanical switch arrangement and the output interface on the output panel of the test adapter box 1 determined by the input port of the LCR tester, thereby determining the frame and size of the entire test adapter box 1; in step S8, the corresponding machining drawings can be drawn based on the frame, size, specific port distribution on the input and output panels and wiring method of the test adapter box 1 determined in step S7, and then the test adapter box 1 is produced.

[0066] In step S1, the method for determining the number of products carried in the test process a is the total number of sensors 3 Y and the effective production time T in a certain order task, the time t required for a single test process, the number of tests x=T / t, and the number of products carried in the test process a=Y / x=Y·t / T.

[0067] In step S2, the specific method for determining the type and number of input interfaces corresponding to the product required on the input panel of the adapter box according to the output signal type and quantity of the product to be tested is as follows: determining the number b of wires that need to be connected to the input panel of the test adapter box 1 for a single sensor 3; combining the number of products carried during the test process a=Y / x=Y·t / T determined in step S1, the number of interfaces on the input panel of the test adapter box 1 can be determined as Z=a·b=b·Y·t / T; the interface type can be determined as a BNC socket for connecting to an RF cable based on the output capacitance signal of the sensor 3. At this point, the number and distribution of the BNC sockets on the input panel can be determined.

[0068] In step S3, the BNC plug specifications of the adapter cable 4 for connecting the sensor 3 to the test adapter box 1 and the coaxial jack or alligator clip for connecting the sensor 3 can be confirmed based on whether the end of the lead wire of the sensor 3 is a stripped loose wire or a crimped coaxial contact. At the same time, the number of adapter cables 4 required can be confirmed based on the product load quantity a=Y / x=Y·t / T during the test process.

[0069] In step S4, the specific method for determining the number and position arrangement of the corresponding input interfaces required on the test adapter box 1 based on the product load quantity a, the input interface on the adapter box input panel, the corresponding wire type of the output cable, and the interface type of the matching product and the adapter box input end determined in steps S1, S2, and S3 is: confirming the size of the holes that need to be opened on the input panel of the test adapter box 1 and the distance between the holes based on the selected BNC socket.

[0070] In step S5, the method of switching different products of the same type during the product test is determined according to the type and number of input interfaces on the test adapter box 1 determined in step S4. The specific method of selecting a relay or a mechanical switch is as follows: if the product input response is instantaneous and does not require a long time to charge to balance, a mechanical toggle switch can be used, and only manual testing can be performed; if automatic switching of sensors is required, relays can be considered. When using relays, the response time of the product from input to output to the LCR tester 2 needs to be taken into account, so as to determine the on-off time of the relay. The sensor example given in the present invention is a capacitive signal that requires charging time, so a mechanical toggle switch is used.

[0071] In steps S6 and S7, the internal wiring mode of the test adapter box 1 and the distribution of the mechanical toggle switches on the upper panel can be determined according to the factors determined in steps S1 to S5.

[0072] In step S8, the corresponding machining drawings and assembly drawings can be drawn according to the previously confirmed hole position distribution of the input panel, the upper panel and the output panel, and finally the test adapter box 1 is produced and put into use.

[0073] The present invention effectively expands the input capacity of expensive LCR testers through the adapter box, meets the needs of testing a large number of sensors, improves test efficiency and accuracy, reduces operational difficulty and the risk of misoperation, simplifies complex wiring into switch operations, and greatly optimizes the test process.

[0074] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A method for preparing a multi-channel testing device, characterized in that: The steps include: Step S1: Determine the load quantity a of the product to be tested during the test; Step S2: Determine the type and number of input interfaces on the input panel of the test adapter box corresponding to the product to be tested based on the type and number of output signals of the product to be tested; Step S3: Determine the type of conductor used in the matching output cable and the interface type corresponding to the output end of the product under test and the input end of the test adapter box according to the output port, output signal type, and number of output channels of the product under test; Step S4: Determine the number and position arrangement of the corresponding input interfaces on the test adapter box based on the load quantity a of the product to be tested determined in steps S1, S2, and S3, the input interface on the input panel of the test adapter box, the corresponding wire type of the output cable, and the interface type that matches the product to be tested and the input end of the test adapter box; Step S5: determining a method for switching between different products of the same type during the test process according to the type and number of input interfaces on the test adapter box determined in step S4; Step S6: Based on the mechanical switch determined in step S5 as the action input for switching the product under test and the number and position arrangement of the input interfaces determined in step S4, the arrangement of the mechanical switches of the test adapter box is determined, and the internal wiring method of the test adapter box connected to the mechanical switch box sensor input interface is determined; Step S7: Based on the internal wiring method, mechanical switch arrangement, output interface on the output panel of the test adapter box, and input port of the LCR meter determined in step S6, the input panel and output panel of the entire test adapter box and the corresponding interface distribution thereon are determined, and the frame and size of the entire test adapter box are determined; Step S8: Based on the test adapter box frame, dimensions, port distribution on the input panel and output panel, and wiring pattern determined in step S7, draw corresponding machining drawings and produce the test adapter box; In step S1, the method for determining the number of loads a of the product to be tested during the test process is: The total number of sensors in the order task is Y, the effective production time is T, the time required for a single test process is t, the number of tests is x=T / t, and the number of products to be tested is a=Y / x=Y·t / T; In step S2, the specific method for determining the type and number of input interfaces corresponding to the product to be tested on the input panel of the test adapter box according to the type and number of output signals of the product to be tested is: Determine the number b of wires connected to the input panel of the test adapter box for a single sensor. Combined with the number of loads a = Y / x = Y t / T of the product under test determined in step S1, determine the number of interfaces on the input panel of the test adapter box to be Z = a · b = b · Y · t / T. The interface type is determined to be a BNC socket that connects to the RF cable based on the output capacitance signal of the sensor. The number and distribution of BNC sockets on the input panel are determined. In step S3, according to whether the end of the sensor lead wire is a stripped loose wire or a crimped coaxial contact, the specifications of the BNC plug of the output cable connecting the sensor to the test adapter box and the coaxial jack or alligator clip connected to the sensor are confirmed; At the same time, according to the load quantity of the product to be tested a=Y / x=Y·t / T during the test process, the number of output cables required is determined.

2. The method for preparing a multi-channel testing device according to claim 1, characterized in that: In step S4, based on the load quantity a of the product to be tested determined in steps S1, S2, and S3, the input interface on the input panel of the test adapter box, the wire type corresponding to the output cable, and the interface type matching the product to be tested and the input end of the test adapter box, the specific method for determining the number and position arrangement of the corresponding input interfaces on the test adapter box is as follows: Based on the selected BNC socket, confirm the size of the holes opened on the input panel of the test adapter box and the distance between the holes.

3. The method for preparing a multi-channel testing device according to claim 1, wherein: In step S5, according to the type and number of input interfaces on the test adapter box determined in step S4, the method for switching between different products of the same type during the test process is determined as follows: If the input response of the product to be tested is instantaneous, use a mechanical toggle switch; If it is an automatically switched sensor, a relay is used and the on and off time of the relay is determined according to the response time of the product to be tested from input to output to the LCR tester.

4. The method for preparing a multi-channel testing device according to claim 1, wherein: In step S6 and step S7, the internal wiring mode of the test adapter box and the distribution of the mechanical toggle switches on the upper panel are determined based on the factors determined in steps S1 to S5.

5. The method for preparing a multi-channel testing device according to claim 1, wherein: In step S8, according to the hole position distribution of the input panel, the upper panel and the output panel determined in the previous step, corresponding machining drawings and assembly drawings are drawn to produce the test adapter box.

6. The method for preparing a multi-channel testing device according to claim 1, characterized in that: The test adapter box, LCR tester, sensor, adapter cable and output cable constitute a multi-channel test device; The test adapter box is connected to the LCR meter via an adapter cable, and the test adapter box serves as a terminal for the sensor capacitance output; The sensor, as a product to be tested, is connected to the input end of the test adapter box via an output cable.

7. The method for preparing a multi-channel testing device according to claim 6, characterized in that: The uniqueness of the LCR tester input terminal is amplified to the load quantity a required in the sensor test process through the test adapter box; The output line of the capacitance signal output by the sensor and the input interface of the corresponding test adapter box both have ground terminals; The sensor output has three channels, each of which requires two output ports. The test adapter box has six ports for each sensor during the test. The number of ports on the input panel of the test adapter box is 6X, where X is the number of sensors in each test. During the sensor test, the sensor product can be switched according to the data recorded by the LCR tester. The sensor output capacitance can be freely selected to be tested at a preset time point or during a preset time period. Any product to be tested can be selected for testing or monitoring. Determine the distribution of mechanical switches on the top panel of the test adapter box based on the number of ports (6X) on the input panel.

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