A method and device for measuring aviation sensor parameters

Abstract

The invention provides an aviation sensor parameter measurement method, comprising: a step of configuring a multi-channel measurement module connected to a sensor to be measured and a plurality of measurement units; a step of configuring and controlling a control unit for switching channels in the multi-channel measurement module; a step of configuring a serial bus connecting an industrial computer and the multi-channel measurement module, and a step of configuring a universal expansion interface connecting the industrial computer and the plurality of measurement units; a step of returning data after the measurement unit executes the measurement step according to an instruction of the industrial computer; and a step of outputting a comparison result of the returned data with a preset parameter. The method can replace the manual measurement method in the prior art, connect a plurality of sensors to be measured and a plurality of test equipments through a plurality of relays to form a plurality of channels, and then control the switching between the channels through the industrial computer, so as to realize the testing of a plurality of parameter technical indicators of the plurality of sensors to be measured one by one, thereby significantly improving the detection efficiency; and realize the automatic measurement, output and storage of parameters.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation engine sensors, and in particular, relates to an aviation sensor parameter measurement method and a measurement device. Background Art

[0002] The electrical accessories in aircraft engines are the basic components of various control systems, which are used to obtain various electrical parameters and adjust related control systems. Among them, the technical indicators of aircraft engine sensors are relatively high, and the technical indicators of various sensors including weight, identification, size, resistance, current, voltage, temperature, insulation parameters, and polarity parameters need to be measured accurately and recorded and archived.

[0003] However, under the existing technology, the demand for sensors in engines is huge, and involves a variety of sensors with different models, specifications, and appearances. The batches of various products are complicated and the quantity fluctuates greatly. Therefore, it is difficult to achieve unified testing of the above-mentioned sensors with different specifications and appearances through assembly line automated testing.

[0004] In order to deal with the above technical problems, for the sake of equipment quality and finished product safety, at this stage, we can only manually test sensors of different specifications, models, and shapes one by one to accurately measure their various parameter technical indicators, and then manually record and archive the measurement results. Obviously, although this measurement and recording method ensures that the technical parameters of each sensor can meet the set specifications, it also has technical problems such as long product inspection cycle, low inspection efficiency, and high dependence on inspection and measurement personnel.

[0005] In view of this, the existing technology should be improved to solve the technical problems of long measurement cycle of insulation performance of aircraft engine sensors, low inspection efficiency and high dependence on inspection and measurement personnel under the existing technology. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an aviation sensor parameter measurement method and measurement device that can replace the method of manually measuring multiple parameter technical indicators of multiple sensors in an aircraft engine under the prior art, thereby realizing automatic measurement, automatic output and storage of parameters.

[0007] To solve the above technical problems, the present invention adopts an aviation sensor parameter measurement method, which includes the following steps: step S1 of configuring a multi-channel measurement module connected to a sensor to be measured and multiple measurement units; step S2 of configuring and controlling a control unit for switching channels in the multi-channel measurement module; step S3 of configuring a serial bus connecting an industrial computer and the multi-channel measurement module, and configuring a universal expansion interface connecting the industrial computer and the multiple measurement units; step S4 of configuring at least one gear of the measurement unit according to an instruction of the industrial computer, and returning data after the measurement unit executes the measurement step; and step S5 of outputting a comparison result of the returned data with preset parameters.

[0008] Preferably, in step S1, the step of configuring the multi-channel measurement module includes: step S11 of configuring multiple groups of relays to form multiple channels; step S12 of correspondingly connecting the multiple input nodes of the channels to the output nodes of the multiple measurement units, and connecting the input nodes of the multiple measurement units to the output nodes of the industrial computer; step S13 of connecting the output nodes of the multiple channels to multiple sensors to be measured.

[0009] Further preferably, in step S4, the step of the industrial computer sending instructions to configure the gear position of the measuring unit includes: the industrial computer sends instructions according to the transmission protocol, and sends them to at least one corresponding measuring unit through the serial bus, and controls the measuring unit to perform corresponding actions.

[0010] More preferably, the step S4 further includes controlling the relay corresponding to the channel to be energized to implement a step S41 of channel switching.

[0011] Still further preferably, in the step S4, the step of the measuring unit performing the corresponding action includes: the step of reading the preset parameters; the step of configuring a counter for calculating the number of measurements, and a timer for calculating the measurement time; the step of continuously acquiring the current parameter value for multiple times according to the set acquisition frequency and comparing it with the standard value of the preset parameter, and realizing the step of adding one or subtracting one to the counter until the counter reaches the set number of times and / or the timer reaches the set time and stops; the step of storing the comparison result; wherein, if the current parameter value is greater than the standard value, the counter is added by one, and if the current parameter value is less than the standard value, the counter is subtracted by one.

[0012] Preferably, in step S5, the step of configuring preset parameters includes: step S51 of configuring various parameters measured in a single measurement cycle; and step S52 of configuring various measurement parameters, measurement times, and upper and lower limits of measurement time.

[0013] Further preferably, in step S5, the step of comparing the returned data with the preset parameters includes: quickly and multiple times sampling multiple groups of return data, comparing them one by one with the preset parameters, discarding the return data that is greater than the upper limit of the parameter / less than the lower limit of the parameter, and weighted averaging the remaining multiple times / groups of the return data, and outputting the average value as the sampling result.

[0014] Correspondingly, the present invention also provides an aviation sensor parameter measurement device based on the above-mentioned aviation sensor parameter measurement method, the measurement device comprising: at least one measuring device; a multi-channel switching device connected to at least one sensor to be measured and to the measuring device; an industrial computer, the industrial computer is respectively connected to the measuring device and the multi-channel switching device through a channel expansion interface and / or a serial bus; an output device, the output device is connected to the industrial computer through an output bus; a storage device, the storage device is connected to the industrial computer through a network bus, wherein the industrial computer sends instructions to control the channels in the multi-channel switching device to be turned on and off, so as to control the measurement device to start and measure the sensor to be measured.

[0015] Preferably, the multi-channel switching device comprises a plurality of groups of relays, the input end of each relay is connected to the output end of the measuring unit, the input end of the measuring unit is connected to the output node of the industrial computer, and the output end of the relay is connected to the sensor to be measured.

[0016] Further preferably, the multi-channel switching device also includes a control unit, which is connected to the industrial computer. The control unit receives instructions from the industrial computer and controls the attraction of the multiple relays in the multi-channel switching device to realize the switching of the channels corresponding to the relays.

[0017] Due to the adoption of the above technical solution, the present invention has the following advantages compared with the prior art:

[0018] 1. Connect multiple sensors to be tested with multiple test equipment through multiple relays to form multiple channels. Then send instructions to the control unit through the industrial computer, and transmit and decode the switching between control channels through the serial interface. In this way, the channels connected to the test equipment can be switched in sequence to achieve the testing of multiple parameter technical indicators of multiple sensors to be tested one by one, thus replacing the manual testing method under the existing technology, and significantly improving the detection efficiency;

[0019] 2. When the measuring unit performs measurement, it reads the preset parameters, configures a counter for calculating the number of measurements and a timer for calculating the measurement time, and then continuously collects the various parameter technical indicators of the sensor according to the set collection frequency, and compares the collected data with the standard value in the preset parameters. Each time the data is collected, the counter is increased or decreased by one until the counter reaches the set number of times. At the same time, the timer times the entire collection process. When the measurement time exceeds the set time, it is determined that the collected polarity parameter fluctuates greatly, and an abnormal result is output. Thus, through the synchronous measurement of the counter and the timer, the rapid measurement of the parameter polarity is achieved to further improve the measurement efficiency and improve the measurement accuracy;

[0020] 3. The preset parameters set various parameters measured in a single measurement cycle, various parameters within a single measurement cycle, the upper and lower limits of the measurement times, and the measurement time. The returned data that does not meet the preset parameters will be discarded according to the range of various parameters, and the returned data that meets the preset parameters will be weighted and averaged and output as the sampling result, thus improving the accuracy and credibility of the output data;

[0021] 4. Multiple relays are connected to multiple sensors to be tested, and the multi-channel switching module switches to the corresponding channel to measure the parameter technical indicators of the sensors to be tested, including weight, identification, size, resistance, current, voltage, temperature, insulation parameters, polarity parameters, etc., and output them through the output device, which optimizes the sensor parameter measurement method and realizes the automatic measurement of sensor parameters;

[0022] 5. The output device is connected to the industrial computer through an output bus. The output device outputs the return data and the sampling data in real time. The output can be displayed on a display or directly printed out by a printer. At the same time, a storage device is set up. The storage device is connected to the industrial computer through a network bus to store the measured data. Furthermore, the measured data can be organized by establishing a data table or database for easy retrieval and query, thereby improving the efficiency and quality of aviation equipment production and testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a flow chart showing the process of the aviation sensor parameter measurement method described in a preferred embodiment of the present invention;

[0024] Figure 2 is a flow chart showing Figure 1 The steps of configuring a multi-channel measurement module in the preferred embodiment shown;

[0025] Figure 3 is a flow chart showing Figure 1 The process of configuring the measurement unit to perform actions in the preferred embodiment shown;

[0026] Figure 4 is a framework diagram showing the framework structure of the aviation sensor parameter measuring device in another preferred embodiment of the present invention;

[0027] Among them: 10, measuring equipment; 20, sensor to be measured; 30, multi-channel switching device; 31, relay; 32, control unit; 40, industrial computer; 50, serial bus; 60, output bus; 61, output device; 70, network bus; 71, storage device. DETAILED DESCRIPTION

[0028] The following will describe an embodiment of an aviation sensor parameter measurement method and a measurement device according to the present invention with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims. In addition, in this specification, the drawings are not drawn to scale and the same reference numerals represent the same parts.

[0029] Figure 1 FIG. 1 is a flow chart showing the process of the method for measuring parameters of an aviation sensor according to a preferred embodiment of the present invention. Figure 1 The aviation sensor parameter measurement method described in this preferred embodiment of the present invention includes the following steps: step S1 of configuring a multi-channel measurement module connected to the sensor to be measured and multiple measurement units; step S2 of configuring and controlling the control unit for connecting and disconnecting the channels in the multi-channel measurement module; step S3 of configuring a serial bus connecting an industrial computer and the multi-channel measurement module, and configuring a universal expansion interface connecting the industrial computer and the multiple measurement units; step S4 of configuring at least one gear of the measurement unit according to the instruction of the industrial computer, and returning the data after the measurement unit executes the measurement step; step S5 of outputting the comparison result of the returned data with the preset parameters.

[0030] In the present invention, the channel is formed by connecting a plurality of sensors to be tested and a plurality of measuring units with a plurality of relays. By controlling the on and off of the plurality of channels, that is, controlling the attraction of the relays corresponding to each channel, the on and off of the channels are controlled to realize channel switching, and then the plurality of relays to be tested are measured one by one in sequence. Figure 2 is a flow chart showing Figure 1 The steps of configuring the multi-channel measurement module in the preferred embodiment shown. Figure 2Specifically, a channel switching circuit is configured for each relay, that is, each channel, and the input nodes of multiple relays are correspondingly connected to the output nodes of multiple measuring units, and the input nodes of multiple measuring units are connected to the output nodes of the industrial computer. A single-chip microcomputer is used as the control unit of the multi-channel measurement module to send host computer instructions to multiple channels so that they are correspondingly connected to the switching circuits of the channels. In this embodiment, the industrial computer is connected to the control unit through a serial bus, and the control unit is connected to multiple channels through a serial bus, such as an RS232 serial bus, or a universal expansion interface, such as a USBHUB, and at the same time, a serial interface connected to each channel or each relay switching circuit is configured. The industrial computer sends instructions and transmits them to the control unit through the serial bus. After receiving the instructions, the serial interface of the control unit decodes the instructions sent by the control unit and transmits them, and controls the on / off and switching of the channels, and finally controls the measuring unit to perform corresponding actions.

[0031] Multiple measuring units each complete different measurement items. For example, it can be an insulation resistance tester to measure the insulation performance of the sensor, or an electronic scale to measure the quality parameters of the sensor, a vernier caliper to measure the size of the sensor, a scanning gun to measure the initialization parameters of the sensor, etc. The measuring unit can include one or more of the above-mentioned measuring devices, and, as mentioned above, through the channel switching circuit, it can be controlled according to the instruction to control the channel corresponding to a certain relay to open, so as to achieve a single-purpose measurement, or it can control multiple relays to switch channels in sequence, so as to achieve the measurement of multiple parameter technical indicators of the sensor one by one. Of course, it can also enable some of the multiple channels to achieve synchronous measurement of several parameters.

[0032] The process of the industrial computer sending an instruction to set the measurement unit to the measurement unit is that the industrial computer sends the upper command according to the transmission protocol, and then sends it to at least one corresponding measurement unit through the serial bus. Figure 3 is a flow chart showing Figure 1 The process of configuring the measurement unit to perform actions in the preferred embodiment shown. Figure 3In this preferred embodiment, each measuring unit is respectively configured with a counter for calculating the number of measurement sampling times and a timer for calculating the measurement sampling time, and preset parameters are set for each parameter technical indicator. The preset parameters include various parameters measured in a single measurement cycle and the upper and lower reference values ​​of each parameter, the number of measurements and the measurement time. After the measurement acquisition is performed, the measuring unit reads the preset parameters, and obtains the corresponding parameter value of the current sensor for multiple times in succession according to the set acquisition frequency, and compares the measurement result with the reference value in the preset parameters. After each comparison, if the current parameter value is greater than the reference value, the counter correspondingly performs the step of adding one, and if the current parameter value is less than the reference value, the counter correspondingly performs the step of subtracting one. The counter counts until the upper or lower reference value of the number of measurements in the preset parameters is reached. At the same time, in the above process, the timer times the acquisition process, and stops when the timer reaches the upper reference value of the measurement time in the preset parameters. Taking the measurement of the resistance or voltage value of the sensor to be tested at the corresponding temperature as an example, the normal temperature data (resistance or voltage) in the preset parameters is read in advance, and then the hot air gun is aimed at the sensor to be tested for heating. At this time, the industrial computer controls the channel where the resistance tester or digital meter is located to be connected, and sets the resistance tester or digital meter to the resistance or voltage measurement position. During the continuous measurement process, the timer times the measurement process, and compares the measured return data with the normal temperature data in the preset parameters. If it is greater than the normal temperature parameter, the counter executes the step of adding one, and if it is less than the normal temperature parameter, the counter executes the step of subtracting one, until the upper limit reference value of the number of measurements in the preset parameters is reached and stops, or until the upper limit reference value of the measurement time in the preset parameters is reached and stops.

[0033] The process of comparing the measurement results with the reference values ​​in the preset parameters is to compare the multiple groups of return data sampled quickly and multiple times with the upper and lower reference values ​​of the parameter in the preset parameters one by one, discard the return data that is greater than the upper reference value or less than the lower reference value, and perform weighted averaging on the remaining multiple groups of return data representing different measurement parameters, and use the average value as the final result of the sampling.

[0034] Correspondingly, the present invention also provides an aviation sensor parameter measurement device based on the above aviation sensor parameter measurement method. Figure 4 FIG. 1 is a frame diagram showing the frame structure of the aviation sensor parameter measurement device in another preferred embodiment of the present invention. Figure 4In another preferred embodiment of the present invention, the aviation sensor parameter measuring device includes a plurality of measuring devices 10, a plurality of sensors to be measured 20, a multi-channel switching device 30 connecting the measuring devices 10 and the sensors to be measured, and an industrial control computer 40 connected to the measuring devices 10 and the multi-channel switching device 30 through a channel expansion interface and / or a serial bus. The industrial control computer 40 sends instructions to control the on and off of the channels in the multi-channel switching device 30, thereby controlling the plurality of measuring devices 10 to start and measure the sensors to be measured 20.

[0035] The multiple channels in the multi-channel switching device 30 are composed of multiple groups of relays 31, the input end of each relay 31 is connected to the output end of the measuring device 10, the input end of the measuring device 10 is connected to the output node of the industrial computer 40, and the output end of the relay 31 is connected to the sensor 20 to be measured. The single-chip microcomputer is used as the control unit 32 of the multi-channel switching device 30 to send host computer instructions to multiple channels so that they can be connected to the switching circuits of the channels. In this embodiment, the industrial computer 40 is connected to the control unit 32 through a serial bus 50, and the control unit is connected to multiple channels through a serial bus, such as an RS232 serial bus, or a universal expansion interface, such as USBHUB, and at the same time, a serial interface connected to each channel or each relay switching circuit is configured. The industrial computer 40 sends instructions and transmits them to the control unit through the serial bus 50. After receiving the instructions, the serial interface of the control unit 32 decodes the instructions sent by the control unit and transmits them, and controls the on / off and switching of the channels, and finally controls the measuring unit to perform corresponding actions.

[0036] Multiple measuring devices each complete different measurement items, for example, it can be an insulation resistance tester to measure the insulation performance of the sensor, or an electronic scale to measure the quality parameters of the sensor, a vernier caliper to measure the size of the sensor, a scanning gun to measure the initialization parameters of the sensor, etc. The measuring unit can include one or more of the above-mentioned measuring devices, and, as mentioned above, through the channel switching circuit, it can be controlled according to the instruction to control the channel corresponding to a certain relay to open, so as to achieve a single-purpose measurement, or it can control multiple relay devices to switch channels in sequence, so as to achieve the measurement of multiple parameter technical indicators of the sensor one by one. Of course, it can also enable some of the multiple channels to achieve synchronous measurement of several parameters.

[0037] In this embodiment, an output device 61 connected to the industrial computer 40 via an output bus 60 and a storage device 71 connected to the industrial computer 40 via a network bus 70 are also included. The output mode of the output device 61 can be displayed on a display device or can be directly printed out in time through a printing device, so as to timely discover hidden dangers and provide more convincing and accurate data for troubleshooting and improvement. The storage device 71 stores the measured data. Further, the measured data can be organized by establishing a data table or database to facilitate retrieval and query, thereby improving the efficiency and quality of aviation equipment production and testing.

[0038] Due to the adoption of the above technical solution, the present invention has the following beneficial technical effects compared with the prior art:

[0039] 1. Connect multiple sensors to be tested with multiple test equipment through multiple relays to form multiple channels. Then send instructions to the control unit through the industrial computer, and transmit and decode the switching between control channels through the serial interface. In this way, the channels connected to the test equipment can be switched in sequence to achieve the testing of multiple parameter technical indicators of multiple sensors to be tested one by one, thus replacing the manual testing method under the existing technology, and significantly improving the detection efficiency;

[0040] 2. When the measuring unit performs measurement, it reads the preset parameters, configures a counter for calculating the number of measurements and a timer for calculating the measurement time, and then continuously collects the various parameter technical indicators of the sensor according to the set collection frequency, and compares the collected data with the standard value in the preset parameters. Each time the data is collected, the counter is increased or decreased by one until the counter reaches the set number of times. At the same time, the timer times the entire collection process. When the measurement time exceeds the set time, it is determined that the collected polarity parameter fluctuates greatly, and an abnormal result is output. Thus, through the synchronous measurement of the counter and the timer, the rapid measurement of the parameter polarity is achieved to further improve the measurement efficiency and improve the measurement accuracy;

[0041] 3. The preset parameters set various parameters measured in a single measurement cycle, various parameters within a single measurement cycle, the upper and lower limits of the measurement times, and the measurement time. The returned data that does not meet the preset parameters will be discarded according to the range of various parameters, and the returned data that meets the preset parameters will be weighted and averaged and output as the sampling result, thus improving the accuracy and credibility of the output data;

[0042] 4. Multiple relays are connected to multiple sensors to be tested, and the multi-channel switching device switches the corresponding channels to measure the parameter technical indicators of the sensors to be tested, including weight, identification, size, resistance, current, voltage, temperature, insulation parameters, polarity parameters, etc., and output them through the output device, which optimizes the sensor parameter measurement method and realizes the automatic measurement of sensor parameters;

[0043] 5. The output device is connected to the industrial computer through an output bus. The output device outputs the return data and the sampling data in real time. The output can be displayed on a display or directly printed out by a printer. At the same time, a storage device is set up. The storage device is connected to the industrial computer through a network bus to store the measured data. Furthermore, the measured data can be organized by establishing a data table or database for easy retrieval and query, thereby improving the efficiency and quality of aviation equipment production and testing.

[0044] The present invention has been described in detail above, and the description of the embodiments is only used to help understand the method and core idea of ​​the present invention, and its purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for measuring parameters of an aviation sensor, characterized in that: The parameter measurement method comprises the following steps: Step S1 of configuring a multi-channel measurement module connected to the sensor to be tested and a plurality of measurement units; Step S2 of configuring and controlling a control unit for connecting and disconnecting channels in the multi-channel measurement module; Step S3 of configuring a serial bus connecting the industrial computer and the multi-channel measurement module, and configuring a universal expansion interface connecting the industrial computer and the multiple measurement units, and controlling the multi-channel relay to sequentially connect the channels in a sequential order, thereby realizing the measurement of multiple parameter technical indicators of the sensor one by one; At least one of the gears of the measuring unit is configured according to the instructions of the industrial computer, and the measuring unit returns the data after executing the measuring step S4, and the steps of the measuring unit executing the action include: the step of reading the preset parameters; the step of configuring a counter for calculating the number of measurements and a timer for calculating the measurement time; the step of obtaining the current parameter value for multiple times according to the set acquisition frequency and comparing it with the standard value of the preset parameter, and realizing the step of adding or subtracting one from the counter until the counter reaches the set number of times and / or the timer reaches the set time and stops; the step of storing the comparison result; wherein, if the current parameter value is greater than the standard value, the counter is added by one, and if the current parameter value is less than the standard value, the counter is subtracted by one; Step S5 of outputting the comparison result between the returned data and the preset parameters.

2. The method for measuring aviation sensor parameters according to claim 1, characterized in that: In step S1, the step of configuring the multi-channel measurement module includes: Step S11 of configuring multiple groups of relays to form multiple channels; Step S12 of correspondingly connecting the plurality of input nodes of the channel to the output nodes of the plurality of measurement units, and connecting the input nodes of the plurality of measurement units to the output nodes of the industrial computer; Step S13 of connecting the output nodes of the plurality of channels to the plurality of sensors to be tested.

3. The method for measuring aviation sensor parameters according to claim 2, characterized in that: In step S4, the step of the industrial computer sending instructions to configure the gear position of the measuring unit includes: The industrial computer sends instructions according to the transmission protocol, and sends the instructions to at least one corresponding measuring unit through the serial bus, and controls the measuring unit to perform actions.

4. The method for measuring aviation sensor parameters according to claim 3, characterized in that: The step S4 further includes controlling the relay corresponding to the channel to be energized to implement the channel switching step S41.

5. The method for measuring aviation sensor parameters according to claim 1, characterized in that: In step S5, the step of configuring the preset parameters includes: Step S51 of configuring various parameters measured in a single measurement cycle; Step S52 of configuring each measurement parameter, the number of measurements, and the upper and lower limits of the measurement time.

6. The method for measuring aviation sensor parameters according to claim 5, characterized in that: In step S5, the step of comparing the returned data with the preset parameters includes: The multiple groups of return data sampled quickly and multiple times are compared one by one with the preset parameters, and the return data that is greater than the upper limit of the parameter / less than the lower limit of the parameter is discarded, and the remaining multiple times / groups of return data are weighted and averaged, and the average value is output as the sampling result.

7. A measuring device applied to the method for measuring aviation sensor parameters according to any one of claims 1 to 6, characterized in that: The measuring device comprises: at least one measuring device; A multi-channel switching device connected to at least one sensor to be measured and to the measuring device; An industrial computer, which is connected to the measuring device and the multi-channel switching device respectively through a channel expansion interface and / or a serial bus; An output device, which is connected to the industrial computer via an output bus; A storage device connected to the industrial computer via a network bus, wherein: The industrial computer sends instructions to control the on and off of channels in the multi-channel switching device, so as to control the measurement equipment to start and measure the sensor to be measured.

8. The measuring device according to claim 7, characterized in that The multi-channel switching device includes multiple groups of relays, the input end of each relay is connected to the output end of the measuring unit, the input end of the measuring unit is connected to the output node of the industrial computer, and the output end of the relay is connected to the sensor to be measured.

9. The measuring device according to claim 8, characterized in that The multi-channel switching device also includes a control unit, which is connected to the industrial computer. The control unit receives instructions from the industrial computer and controls the attraction of multiple relays in the multi-channel switching device to achieve the switching of channels corresponding to the relays.

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