Induction type conductivity electrode testing method

Abstract

The invention provides an inductive conductivity electrode testing method, which comprises the following steps that: a main control device controls a plurality of signal acquisition modules to simultaneously introduce a test signal into a to-be-tested inductive electrode and acquire a first signal value, and the first signal value is obtained in a state of accessing a first standard resistor; the main control device controls the relay to be switched and connected to a second standard resistor after collecting the first signal value, and the resistance value of the second standard resistor is larger than that of the first standard resistor; the master control device controls the signal acquisition module to acquire a second signal value of the induction type electrode to be detected after the induction type electrode is connected to the second standard resistor; the main control device calculates the difference value between the first signal value and the second signal value and judges the qualified state of the induction type electrode to be detected according to the preset interval where the difference value is located; and the main control device controls the corresponding indicating lamp to display the color according to the judgment result and presents the difference value in the display area.

Description

Technical Field

[0001] This invention relates to the field of information technology, and in particular to a method for testing inductive conductivity electrodes. Background Technology

[0002] In the field of industrial automation inspection, the performance testing of inductive electrodes plays a crucial role, directly impacting equipment stability and product quality and safety. As industrial production increasingly demands both efficiency and precision, achieving a balance between speed and reliability in batch testing has become a key research and application direction in this field. As a core component for sensing and transmitting signals, the accurate evaluation of the performance of inductive electrodes plays an irreplaceable role in ensuring smooth production processes.

[0003] However, existing detection methods often struggle to balance the accuracy of signal acquisition with the stability of the operation process when facing multi-channel parallel testing. Especially in scenarios requiring the simultaneous processing of multiple electrode signals, the detection equipment is susceptible to external interference, leading to significant fluctuations in the acquired signal values ​​and consequently affecting the reliability of the final judgment. Furthermore, the presentation of detection results is often not intuitive enough, making it difficult for operators to quickly determine the electrode status, increasing the cost of manual intervention and the risk of errors.

[0004] A deeper technical challenge lies in effectively controlling the switching process of standard resistors in multi-channel detection and accurately reflecting the performance status of the electrodes through this process. The switching of standard resistors is a core element of the detection process, determining the benchmark for signal value comparison. However, if the switching is not stable enough or the control is not precise enough, it will lead to deviations in signal values, thus affecting the judgment of electrode status. For example, in batch testing, if the resistor switching time is too short and data is acquired before the signal has stabilized, the obtained values ​​may deviate from the true situation. Furthermore, if the switching times are inconsistent, differences in the benchmarks between different channels will also occur, ultimately leading to some electrodes being misjudged as unqualified, or even masking the true performance problems. This signal deviation problem caused by inaccurate switching control has become a core bottleneck restricting detection efficiency and accuracy.

[0005] Therefore, how to achieve precise control of standard resistor switching in multi-channel parallel detection, and ensure that batch detection is both efficient and reliable through stable signal acquisition and intuitive judgment methods, has become a key problem that needs to be solved in this study. Summary of the Invention

[0006] This invention provides a method for testing inductive conductivity electrodes, mainly comprising: The main control device controls multiple signal acquisition modules to simultaneously apply test signals to the inductive electrode under test and acquire a first signal value, which is obtained when a first standard resistor is connected. After acquiring the first signal value, the main control device controls a relay to switch to a second standard resistor, the resistance of which is greater than that of the first standard resistor. The main control device controls the signal acquisition modules to acquire a second signal value of the inductive electrode under test after the second standard resistor is connected. The main control device calculates the difference between the first and second signal values ​​and determines the pass / fail status of the inductive electrode under test based on the preset range of the difference. Based on the determination result, the main control device controls the corresponding indicator light to display a color and presents the difference in the display area.

[0007] Furthermore, the main control device controls multiple signal acquisition modules to simultaneously apply test signals to the inductive electrode under test and acquire a first signal value. The first signal value is obtained when a first standard resistor is connected. This includes: the main control device sending a control command to the signal acquisition modules via a communication interface to connect the first standard resistor; each signal acquisition module responding to the control command driving the primary coil to apply alternating current to generate an alternating magnetic field and inducing the voltage signal output by the inductive electrode under test through the secondary coil; the signal acquisition module performing operational amplification on the voltage signal and converting it into a digital quantity via an analog-to-digital converter as the first signal value, which is then uploaded to the main control device; and the main control device receiving and retaining the first signal values ​​uploaded from each channel.

[0008] Furthermore, after acquiring the first signal value, the main control device controls the relay to switch to the second standard resistor, the resistance value of the second standard resistor being greater than that of the first standard resistor. This includes: the main control device starting a preset countdown and sending a switching command to the signal acquisition module after the countdown ends; each channel relay responding to the switching command disconnecting the first standard resistor and closing to connect to the second standard resistor; and the main control device maintaining the connection status of the second standard resistor for a preset duration after confirming the connection status to stabilize the signal acquisition conditions.

[0009] Furthermore, the main control device controls the signal acquisition module to acquire the second signal value of the inductive electrode under test after the second standard resistor is connected, including: the signal acquisition module acquires the induced voltage of the secondary coil in real time after the second standard resistor is connected and amplifies it through an operational amplifier circuit; the signal acquisition module converts the amplified analog voltage into a digital quantity as the second signal value through an analog-to-digital converter; the signal acquisition module sends the second signal value to the main control device through a communication interface; the main control device receives and retains the second signal value of each channel for subsequent difference calculation.

[0010] Furthermore, the main control device calculates the difference between the first signal value and the second signal value and determines the pass / fail status of the inductive electrode under test based on the preset interval in which the difference lies, including: the main control device calculates the difference between the first signal value and the second signal value for each channel; if the difference is within a first preset interval, it determines that the coil of the inductive electrode under test has a short circuit or an open circuit; if the difference is within a second preset interval, it determines that the performance or number of turns of the coil of the inductive electrode under test is unqualified; if the difference is within a third preset interval, it determines that the inductive electrode under test is qualified.

[0011] Furthermore, the main control device controls the corresponding indicator light to display color and presents the difference value in the display area according to the judgment result, including: the main control device controls the corresponding indicator light to display red and outputs the difference value in the display area for channels judged to be short-circuited or open-circuited; the main control device controls the corresponding indicator light to display red and outputs the difference value in the display area for channels judged to be unqualified; the main control device controls the corresponding indicator light to display green and outputs the difference value in the display area for channels judged to be qualified; the main control device summarizes the judgment results and the difference value of all channels on the main interface for viewing.

[0012] Furthermore, the main control device calculates the difference between the first signal value and the second signal value for each channel, including: the main control device extracting the first signal value and the second signal value of each channel from the retained records; the main control device performing a subtraction operation to generate the difference and associating it with the corresponding inductive electrode identifier to be tested; and the main control device comparing the difference with the first preset interval, the second preset interval, and the third preset interval one by one to determine the interval to which it belongs.

[0013] Furthermore, the main control device sends a control command to the signal acquisition module via a communication interface to connect to the first standard resistor, including: the main control device responding to the user operation command to initialize all channel relays and uniformly connect to the first standard resistor; the microcontroller unit of each signal acquisition module receives the control command and drives the generator to supply AC power; after monitoring the signal to stabilize, the signal acquisition module starts to acquire and periodically uploads real-time voltage digital values ​​to the main control device; the main control device accumulates multiple sets of the first signal values ​​within a preset time period and takes the average value as the final retained first signal value.

[0014] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects: This invention discloses a highly efficient automated testing method for inductive electrode detection. Through the collaborative work of a main control device and multiple signal acquisition modules, it solves the logical correlation problem between signal acquisition accuracy, switching resistor stability, and the intuitiveness of judgment results in multi-channel simultaneous detection. In practical business scenarios, the performance testing of inductive electrodes needs to balance the efficiency of multi-channel parallel testing with the reliability of results. This invention precisely controls the switching of standard resistors and acquires signal values ​​under different resistance states, calculates the difference, and combines it with a preset interval to determine the electrode's pass / fail status. Simultaneously, it uses indicator light colors and display areas to intuitively present the results, ensuring automated testing and accurate judgment. This invention introduces a preset duration stabilization mechanism and multi-set data averaging during signal acquisition, improving data reliability. By dividing the difference interval, it accurately distinguishes between short circuits, open circuits, performance defects, and pass / fail statuses, achieving refined management of the detection. Ultimately, this invention significantly improves the efficiency and accuracy of batch testing of inductive electrodes, providing an innovative solution for industrial automated testing. Attached Figure Description

[0015] Figure 1 This is a flowchart of an inductive conductivity electrode testing method according to the present invention. Detailed Implementation

[0016] To further understand the content of this invention, a detailed description of the invention is provided in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0017] like Figure 1 This embodiment of an inductive conductivity electrode testing method may specifically include: S1, the main control device controls multiple signal acquisition modules to simultaneously pass test signals to the inductive electrode under test and acquire the first signal value, which is obtained when the first standard resistor is connected.

[0018] S2, after acquiring the first signal value, the main control device controls the relay to switch to the second standard resistor, the resistance value of the second standard resistor is greater than the resistance value of the first standard resistor.

[0019] S3, the main control device controls the signal acquisition module to acquire the second signal value of the inductive electrode under test after it is connected to the second standard resistor.

[0020] S4, the main control device calculates the difference between the first signal value and the second signal value and determines the qualified status of the inductive electrode under test according to the preset range in which the difference is located.

[0021] S5, the main control device controls the corresponding indicator light to display color according to the judgment result and presents the difference in the display area.

[0022] S106. The main control device controls multiple signal acquisition modules to simultaneously apply test signals to the inductive electrode under test and acquire a first signal value, wherein the first signal value is obtained under the condition of connecting a first standard resistor, including: S21, the main control device sends a control command to the signal acquisition module to connect the first standard resistor through a communication interface; S22, each of the signal acquisition modules responds to the control command by driving the primary coil to apply alternating current to generate an alternating magnetic field and inducing the voltage signal output by the inductive electrode under test through the secondary coil; S23, the signal acquisition module performs operational amplification on the voltage signal and converts it into a digital quantity through an analog-to-digital converter as the first signal value and uploads it to the main control device; S24, the main control device receives and retains the first signal value uploaded by each channel.

[0023] S107. After acquiring the first signal value, the main control device controls the relay to switch to the second standard resistor, the resistance value of the second standard resistor being greater than the resistance value of the first standard resistor, including: S25. The main control device starts a preset time countdown and sends a switching command to the signal acquisition module after the countdown ends; S26. Each channel relay responds to the switching command, disconnects the first standard resistor and closes the connection to the second standard resistor; S27. After confirming the connection status of the second standard resistor, the main control device continues to maintain the preset time to stabilize the signal acquisition conditions.

[0024] S108. The main control device controls the signal acquisition module to acquire the second signal value of the inductive electrode under test after the second standard resistor is connected, including: S31. The signal acquisition module acquires the induced voltage of the secondary coil in real time after the second standard resistor is connected and amplifies it through an operational amplifier circuit; S32. The signal acquisition module converts the amplified analog voltage into a digital quantity as the second signal value through an analog-to-digital converter; S33. The signal acquisition module sends the second signal value to the main control device through a communication interface; S34. The main control device receives and retains the second signal value of each channel for subsequent difference calculation.

[0025] S109. The main control device calculates the difference between the first signal value and the second signal value and determines the pass / fail status of the inductive electrode under test according to the preset interval in which the difference lies, including: S41. The main control device calculates the difference between the first signal value and the second signal value for each channel; S42. If the difference is within a first preset interval, it is determined that the coil of the inductive electrode under test has a short circuit or an open circuit; S43. If the difference is within a second preset interval, it is determined that the performance or number of turns of the coil of the inductive electrode under test is unqualified; S44. If the difference is within a third preset interval, it is determined that the inductive electrode under test is qualified.

[0026] S1010. The main control device controls the corresponding indicator light to display color and presents the difference value in the display area according to the judgment result, including: S51, the main control device controls the corresponding indicator light to display red and outputs the difference value in the display area for channels judged to be short-circuited or open-circuited; S52, the main control device controls the corresponding indicator light to display red and outputs the difference value in the display area for channels judged to be unqualified; S53, the main control device controls the corresponding indicator light to display green and outputs the difference value in the display area for channels judged to be qualified; S54, the main control device summarizes the judgment results and the difference value of all channels on the main interface for viewing.

[0027] S1011, the main control device calculates the difference between the first signal value and the second signal value for each channel, including: S55, the main control device extracts the first signal value and the second signal value of each channel from the retained records; S56, the main control device performs a subtraction operation to generate the difference and associates it with the corresponding inductive electrode identifier to be tested; S57, the main control device compares the difference with the first preset interval, the second preset interval, and the third preset interval one by one to determine the interval to which it belongs.

[0028] S1012, the main control device sends a control command to the signal acquisition module via a communication interface to connect to the first standard resistor, including: S61, the main control device responds to the user operation command, initializes all channel relays, and connects to the first standard resistor uniformly; S62, the microcontroller unit of each signal acquisition module receives the control command and drives the generator to supply AC power; S63, after monitoring the signal to stabilize, the signal acquisition module starts to acquire and periodically uploads real-time voltage digital values ​​to the main control device; S64, the main control device accumulates multiple sets of the first signal values ​​within a preset time period and takes the average value as the final retained first signal value.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for testing inductive conductivity electrodes, characterized in that, include: The main control device controls multiple signal acquisition modules to simultaneously pass test signals to the inductive electrode under test and acquire the first signal value, which is obtained when a first standard resistor is connected. After acquiring the first signal value, the main control device controls the relay to switch to the second standard resistor, the resistance value of the second standard resistor being greater than the resistance value of the first standard resistor; The main control device controls the signal acquisition module to acquire the second signal value of the inductive electrode under test after it is connected to the second standard resistor; The main control device calculates the difference between the first signal value and the second signal value and determines the pass / fail status of the inductive electrode under test based on the preset range in which the difference lies; The main control device controls the corresponding indicator light to display color based on the judgment result and presents the difference in the display area.

2. The method as described in claim 1, characterized in that, The main control device controls multiple signal acquisition modules to simultaneously apply test signals to the inductive electrode under test and acquire a first signal value. The first signal value is obtained when a first standard resistor is connected, including: The main control device sends a control command to the signal acquisition module via the communication interface to connect to the first standard resistor; Each of the signal acquisition modules responds to the control command by driving the primary coil to pass in alternating current to generate an alternating magnetic field and inducing the voltage signal output by the inductive electrode under test through the secondary coil; The signal acquisition module amplifies the voltage signal and converts it into a digital value using an analog-to-digital converter, which is then uploaded to the main control device as the first signal value. The main control device receives and retains the first signal value uploaded from each channel.

3. The method as described in claim 1, characterized in that, After acquiring the first signal value, the main control device controls the relay to switch to a second standard resistor. The resistance value of the second standard resistor is greater than that of the first standard resistor, including: The main control device starts a preset countdown and sends a switching command to the signal acquisition module after the countdown ends; Each channel relay responds to the switching command by disconnecting the first standard resistor and closing the connection to the second standard resistor; After confirming the connection status of the second standard resistor, the main control device continues to maintain the connection for a preset duration to stabilize the signal acquisition conditions.

4. The method as described in claim 1, characterized in that, The main control device controls the signal acquisition module to acquire the second signal value of the inductive electrode under test after it is connected to the second standard resistor, including: The signal acquisition module acquires the induced voltage of the secondary coil in real time after the second standard resistor is connected and amplifies it through the operational amplifier circuit. The signal acquisition module converts the amplified analog voltage into a digital value using an analog-to-digital converter, which is then used as the second signal value. The signal acquisition module sends the second signal value to the main control device through the communication interface; The main control device receives and retains the second signal value of each channel for subsequent difference calculation.

5. The method as described in claim 1, characterized in that, The main control device calculates the difference between the first signal value and the second signal value and determines the pass / fail status of the inductive electrode under test based on the preset interval in which the difference lies, including: The main control device calculates the difference between the first signal value and the second signal value for each channel; If the difference is within the first preset range, it is determined that the inductive electrode coil under test has a short circuit or an open circuit. If the difference is within the second preset range, the performance or number of turns of the inductive electrode coil under test is determined to be unqualified. If the difference is within the third preset range, the inductive electrode under test is deemed qualified.

6. The method as described in claim 1, characterized in that, The main control device controls the corresponding indicator light to display color and presents the difference in the display area according to the judgment result, including: The main control device controls the corresponding indicator light to display red for channels that are determined to be short-circuited or open-circuited, and outputs the difference value in the display area. The main control device controls the corresponding indicator light to turn red for channels that are determined to be unqualified and outputs the difference value in the display area; The main control device controls the corresponding indicator light to display green for channels that have passed the assessment, and outputs the difference value in the display area. The main control device summarizes the judgment results of all channels and the difference on the main interface for viewing.

7. The method as described in claim 5, characterized in that, The main control device calculates the difference between the first signal value and the second signal value for each channel, including: The main control device extracts the first signal value and the second signal value of each channel from the retained records; The main control device performs a subtraction operation to generate the difference and associates it with the corresponding inductive electrode identifier to be tested. The main control device compares the difference with the first preset interval, the second preset interval, and the third preset interval one by one to determine the interval to which it belongs.

8. The method as described in claim 1, characterized in that, The main control device sends a control command to the signal acquisition module via a communication interface to connect to the first standard resistor, including: The main control device responds to user operation commands, initializes all channel relays, and connects them all to the first standard resistor. The microcontroller unit of each of the signal acquisition modules receives the control command and drives the generator to supply AC power; After the signal acquisition module monitors the signal and stabilizes, it begins to acquire and periodically uploads real-time digital voltage values ​​to the main control device. The main control device accumulates multiple sets of the first signal values ​​within a preset time period and takes the average value as the final retained first signal value.

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