CN116338290A - A solenoid valve current detection method and system - Google Patents

Abstract

The application provides a solenoid valve current detection method and system, the method comprising: connecting the current sensor with the solenoid valve to be tested, so that there are multiple current signal acquisition channels between the current sensor and the solenoid valve to be tested; The current signal acquisition channel is turned on and used as the current signal channel to be tested; the current signal on the current signal channel to be tested is collected, and the current signal is converted into a voltage signal; then the voltage signal is calibrated and calculated to obtain the current corresponding to the voltage signal Value; compare the current value calculated by calibration with the preset threshold value to determine whether the solenoid valve to be tested is faulty. This application can collect solenoid valve current data, and give an alarm to abnormal current data, prompting timely inspection and maintenance of the line; at the same time, it can also perform data transmission with the host computer, and transmit the collected data and judgment results to the host computer through serial communication, real-time Monitor the current data and operating status of the solenoid valve.

Description

A solenoid valve current detection method and system

technical field

The present application relates to the technical field of solenoid valve detection, in particular to a method and system for detecting solenoid valve current.

Background technique

Solenoid valve is a main executive part in automatic control system, and it is widely used in safety interlock protection process. As a key component in the safety interlock protection system, the solenoid valve's start-stop and action parameters in its working state are related to the safe operation of the entire system. Therefore, the monitoring of the operating state of the solenoid valve is of great significance for the safe, stable and reliable operation of large-scale equipment.

At present, the data detection of solenoid valves is mainly through on-site worker inspections. Engineers inspect the site irregularly every day, record the inspection data, and then organize and analyze the recorded data to see if the solenoid valves are working normally. This detection method is time-consuming and laborious, and the detection result cannot be obtained in time. Another detection method is to connect the detection circuit in series to the current loop of the solenoid valve, but this method needs to be pre-installed in advance or shut down for installation, which is very difficult to install and implement, which is very unfavorable for detection.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, the purpose of this application is to provide a solenoid valve current detection method and system for solving the problems of time-consuming, laborious and inconvenient detection of the solenoid valve in the prior art.

In order to achieve the above purpose and other related purposes, the present application provides a method for detecting the current of a solenoid valve, including the following steps:

Connecting the current sensor to the solenoid valve to be tested, so that there are multiple current signal acquisition channels between the current sensor and the solenoid valve to be tested;

Randomly select a current signal acquisition channel to conduct as the current signal channel to be tested;

Collecting the current signal on the channel to be measured of the current signal, and converting the current signal into a voltage signal;

performing calibration calculation on the voltage signal to obtain a current value corresponding to the voltage signal;

Comparing the current value calculated by calibration with the first threshold value and the second threshold value respectively, to determine whether the solenoid valve to be tested is faulty; if the current value calculated by calibration is greater than the first threshold value, or the calculated current value by calibration If the current value is less than the second threshold, it is determined that the solenoid valve to be tested is faulty; wherein, the first threshold is greater than the second threshold.

Optionally, if the electromagnetic valve to be tested is not faulty, the method further includes: selecting another current signal acquisition channel from the multiple current signal acquisition channels as a new current signal to be tested channel, and based on The current signal on the channel under test of the new current signal determines whether the solenoid valve under test fails.

Optionally, if the electromagnetic valve to be tested fails, the method further includes: generating an alarm signal based on a current signal that causes the electromagnetic valve to be tested to fail; wherein the alarm signal includes at least one of the following: Optical signal, electrical control device signal.

Optionally, when generating the alarm signal based on the current signal that causes the electromagnetic valve to be tested to fail, it includes: first generating an optical signal, and then generating an electrical control device signal; or generating an electrical control device signal, and then generating an optical signal.

Optionally, the optical signal includes: a light-emitting diode light-emitting signal; the electrical control device signal includes: a relay electric shock signal.

Optionally, after the alarm signal is generated, the method further includes:

Assembling the current signal and the alarm signal causing the failure of the solenoid valve to be tested to form a data frame;

Determine whether there is a data frame request at the communication serial port of the upper computer;

If there is a data frame request at the communication serial port of the upper computer, the data frame is sent to the upper computer through the communication serial port of the upper computer for real-time monitoring, and another current signal acquisition is selected from the multiple current signal acquisition channels The channel is used as a new current signal channel to be tested, and based on the current signal on the new current signal channel to be tested, it is determined whether the solenoid valve to be tested fails;

If there is no data frame request at the communication serial port of the upper computer, then select another current signal acquisition channel from the multiple current signal acquisition channels as a new current signal channel to be tested, and based on the new current signal channel to be tested The electric current signal determines whether the electromagnetic valve under test fails.

Optionally, the method further includes: storing the current signal collected on each current signal collection channel and the converted voltage signal; and storing the electromagnetic valve fault detection result corresponding to each current signal collection channel.

The present application also provides a solenoid valve current detection system, the system includes:

The communication module is used to connect the current sensor with the solenoid valve to be tested, so that there are multiple current signal acquisition channels between the current sensor and the solenoid valve to be tested;

The channel selection module is used to randomly select a current signal acquisition channel to conduct as the current signal channel to be tested;

A current conversion module, configured to collect the current signal on the channel to be measured of the current signal, and convert the current signal into a voltage signal;

A calibration calculation module, configured to perform calibration calculation on the voltage signal to obtain a current value corresponding to the voltage signal;

The fault detection module is used to compare the current value calculated by calibration with the first threshold value and the second threshold value respectively, and determine whether the solenoid valve to be tested is faulty; if the current value calculated by calibration is greater than the first threshold value , or the current value calculated by calibration is less than the second threshold, it is determined that the electromagnetic valve under test is faulty; wherein, the first threshold is greater than the second threshold.

Optionally, the system further includes an alarm module, configured to generate an alarm signal based on a current signal that causes the electromagnetic valve to be tested to fail when the electromagnetic valve to be tested fails; wherein the alarm signal includes At least one of the following: optical signal, electrical control device signal.

Optionally, the system further includes a storage module for storing the current signal collected on each current signal collection channel and the converted voltage signal; and storing the solenoid valve corresponding to each current signal collection channel Fault detection results.

As mentioned above, the present application provides a solenoid valve current detection method and system, which has the following beneficial effects: the present application first connects the current sensor to the solenoid valve to be tested, so that the current sensor and the solenoid valve to be tested There are multiple current signal acquisition channels between them; then randomly select one current signal acquisition channel to conduct as the current signal channel to be tested; then collect the current signal on the current signal channel to be tested, and convert the current signal into voltage signal; then perform calibration calculation on the voltage signal to obtain the current value corresponding to the voltage signal; finally compare the calibration calculated current value with the first threshold value and the second threshold value respectively to determine the Whether the solenoid valve is faulty; if the current value calculated by calibration is greater than the first threshold, or the current value calculated by calibration is smaller than the second threshold, it is determined that the solenoid valve to be tested is faulty; wherein, the first threshold greater than the second threshold. It can be seen that this application does not require manual inspection to record the current detection data of the solenoid valve, and can automatically complete the collection of multi-channel solenoid valve current data, and alarm the abnormal current data, prompting timely inspection and maintenance of the circuit. It is equivalent to that this application provides a reliable real-time monitoring method for the operating status of the solenoid valve, which not only saves manpower and time, but also is simple to implement. The sensor is buckled on the current line of the solenoid valve, which is simple and convenient to install, and can meet the accuracy requirements of the solenoid valve current detection in the automatic control system. At the same time, this application can also carry out data transmission with the configuration software of the upper computer, and transmit the collected data and judgment results to the configuration software of the upper computer through serial port communication, and monitor and display the current data and operating status of the solenoid valve in real time.

Description of drawings

Fig. 1 is the schematic flow chart of the solenoid valve current detection method provided by an embodiment of the present application;

FIG. 2 is a schematic flow chart of a solenoid valve current detection method provided in another embodiment of the present application;

Fig. 3 is a schematic diagram of the hardware structure of the solenoid valve current detection system provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of the principle of a solenoid valve current detection system provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a hardware framework of a solenoid valve current detection system provided by an embodiment of the present application.

Detailed ways

Embodiments of the present application are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of the application, and only the components related to the application are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complicated.

Please refer to FIG. 1, the present embodiment provides a method for detecting the current of a solenoid valve, including the following steps:

S110, connecting the current sensor to the solenoid valve to be tested, so that there are multiple current signal acquisition channels between the current sensor and the solenoid valve to be tested;

S120, randomly selecting a current signal acquisition channel to conduct as the current signal channel to be tested;

S130, collect the current signal on the channel to be measured of the current signal, and convert the current signal into a voltage signal;

S140, perform calibration calculation on the voltage signal, and obtain a current value corresponding to the voltage signal;

S150. Comparing the current value calculated by calibration with the first threshold and the second threshold, respectively, to determine whether the solenoid valve to be tested is faulty; if the current value calculated by calibration is greater than the first threshold, or the calibration calculation If the output current value is less than the second threshold, it is determined that the electromagnetic valve under test is faulty; wherein, the first threshold is greater than the second threshold.

It can be seen that this embodiment does not require manual inspection and recording of solenoid valve current detection data, and can automatically complete the collection of multi-channel solenoid valve current data, and give an alarm to abnormal current data, prompting timely inspection and maintenance of the circuit. It is equivalent to that this embodiment provides a reliable real-time monitoring method for the operating state of the solenoid valve, which not only saves manpower and time, but also is simple to implement. The sensor needs to be buckled on the solenoid valve current line, the installation is simple and convenient, and it can meet the accuracy requirements of the solenoid valve current detection in the automation control system. At the same time, this embodiment can also perform data transmission with the configuration software of the host computer, and transmit the collected data and judgment results to the configuration software of the host computer through serial port communication, and monitor and display the current data and operating status of the solenoid valve in real time.

In an exemplary embodiment, if the solenoid valve to be tested does not fail, this embodiment may further include: selecting another current signal acquisition channel from the multiple current signal acquisition channels as a new current signal acquisition channel. The test channel, and based on the current signal on the test channel of the new current signal, determine whether the solenoid valve under test fails. It can be seen that in this embodiment, after selecting a current signal acquisition channel, if the solenoid valve to be tested does not fail, a new current signal acquisition channel will be automatically reselected to determine whether the solenoid valve to be tested is faulty, and multiple steps can be automatically completed. The current data collection of the solenoid valve and the fault detection of the solenoid valve can meet the accuracy requirements of the solenoid valve current detection in the automation control system.

In another exemplary embodiment, if the electromagnetic valve to be tested fails, this embodiment may further include: generating an alarm signal based on a current signal that causes the electromagnetic valve to be tested to fail; wherein the alarm signal Including at least one of the following: optical signal, electrical control device signal. In this embodiment, when generating the alarm signal based on the current signal that causes the electromagnetic valve to be tested to fail, it includes: first generating an optical signal, and then generating an electrical control device signal; or, generating an electrical control device signal, and then generating an optical signal . As an example, the optical signal in this embodiment includes: a light-emitting diode light-emitting signal; the electrical control device signal includes: a relay electric shock signal.

In an exemplary embodiment, after the alarm signal is generated, this embodiment may further include: assembling the current signal that causes the failure of the solenoid valve to be tested and the alarm signal to form a data frame; Whether there is a data frame request in the serial port; if there is a data frame request in the communication serial port of the upper computer, then the data frame is sent to the upper computer through the communication serial port of the upper computer for real-time monitoring, and from the multi-channel current signal acquisition channel Select another current signal acquisition channel as a new current signal channel to be tested, and determine whether the solenoid valve to be tested is faulty based on the current signal on the new current signal channel to be tested; if the host computer communication serial port does not exist data frame request, select another current signal acquisition channel from the multiple current signal acquisition channels as a new current signal channel to be tested, and determine the electromagnetic signal to be tested based on the current signal on the new current signal channel to be tested. If the valve is malfunctioning. It can be seen that, in this embodiment, the current data and operating status of the solenoid valve can be monitored in real time through the host computer, and when the solenoid valve fails, the maintenance personnel can be repaired in time.

In an exemplary embodiment, this embodiment may further include: storing the current signal collected on each current signal collection channel and the converted voltage signal; and storing the solenoid valve corresponding to each current signal collection channel Fault detection results.

In another exemplary embodiment of the present application, as shown in FIG. 2 , this embodiment also provides a solenoid valve current detection method, including the following steps:

Connecting the current sensor to the solenoid valve to be tested, so that there are multiple current signal acquisition channels between the current sensor and the solenoid valve to be tested;

Randomly select a current signal acquisition channel to conduct as the current signal channel to be tested;

Collecting the current signal on the channel to be measured of the current signal, and converting the current signal into a voltage signal;

performing calibration calculation on the voltage signal to obtain a current value corresponding to the voltage signal;

The current value calculated by calibration is compared with the first threshold value and the second threshold value respectively to determine whether the solenoid valve to be tested is faulty. If it is judged that the electromagnetic valve to be tested has not broken down based on the currently selected current signal channel to be tested, then reselect another current signal acquisition channel as a new current signal channel to be tested from the multiple current signal acquisition channels, and based on The current signal on the channel under test of the new current signal determines whether the solenoid valve under test fails. If it is judged that the solenoid valve to be tested fails based on the currently selected current signal channel to be tested, an alarm signal is generated based on the current signal that causes the solenoid valve to be tested to fail; Diode, referred to as LED) light-emitting signal, and then generate a relay electric shock signal; and enter the next step;

Assembling the current signal and the alarm signal causing the failure of the solenoid valve to be tested to form a data frame;

Judge whether there is a data frame request at the communication serial port of the upper computer; if there is a data frame request at the communication serial port of the upper computer, then the data frame is sent to the upper computer through the communication serial port of the upper computer for real-time monitoring, and from the multi-channel Select another current signal acquisition channel in the current signal acquisition channel as a new current signal channel to be tested, and determine whether the solenoid valve to be tested is faulty based on the current signal on the new current signal channel to be tested; if the host computer If there is no data frame request at the communication serial port, another current signal acquisition channel is selected from the multiple current signal acquisition channels as a new current signal channel to be tested, and the current signal on the new current signal channel to be tested is used to determine the current signal. Check whether the solenoid valve to be tested is faulty.

It can be seen that this embodiment does not require manual inspection and recording of solenoid valve current detection data, and can automatically complete the collection of multi-channel solenoid valve current data, and give an alarm to abnormal current data, prompting timely inspection and maintenance of the circuit. It is equivalent to that this embodiment provides a reliable real-time monitoring method for the operating state of the solenoid valve, which not only saves manpower and time, but also is simple to implement. The sensor needs to be buckled on the solenoid valve current line, the installation is simple and convenient, and it can meet the accuracy requirements of the solenoid valve current detection in the automation control system. At the same time, this embodiment can also perform data transmission with the configuration software of the host computer, and transmit the collected data and judgment results to the configuration software of the host computer through serial port communication, and monitor and display the current data and operating status of the solenoid valve in real time.

In summary, the present application provides a method for detecting the current of a solenoid valve. Firstly, the current sensor is connected to the solenoid valve to be tested, so that there are multiple current signal acquisition channels between the current sensor and the solenoid valve to be tested. ; Then randomly select one current signal acquisition channel to be turned on as the current signal channel to be measured; then collect the current signal on the channel to be measured of the current signal, and convert the current signal into a voltage signal; The signal is calibrated and calculated to obtain the current value corresponding to the voltage signal; finally, the current value calculated by the calibration is compared with the first threshold and the second threshold respectively to determine whether the electromagnetic valve to be tested is faulty; if the calibration If the calculated current value is greater than the first threshold, or if the calculated current value is less than the second threshold, then it is determined that the electromagnetic valve under test is faulty; wherein the first threshold is greater than the second threshold. It can be seen that this method does not require manual inspection to record the current detection data of the solenoid valve, and can automatically complete the collection of multi-channel solenoid valve current data, and alarm the abnormal current data, prompting timely inspection and maintenance of the circuit. It is equivalent to that this method provides a reliable real-time monitoring method for the operating state of the solenoid valve, which not only saves manpower and time, but also is simple to implement. The sensor is buckled on the current line of the solenoid valve, which is simple and convenient to install, and can meet the accuracy requirements of the solenoid valve current detection in the automatic control system. At the same time, the method can also perform data transmission with the configuration software of the host computer, and transmit the collected data and judgment results to the configuration software of the host computer through serial port communication, and monitor and display the current data and operating status of the solenoid valve in real time.

As shown in Figure 3, the present application also provides a solenoid valve current detection system, the system includes:

The communication module 310 is used to connect the current sensor with the solenoid valve to be tested, so that there are multiple current signal acquisition channels between the current sensor and the solenoid valve to be tested. As an example, the communication module 310 in this embodiment can use the STM32F107 chip as the core controller, and then connect and set 16 current signal acquisition channels.

The channel selection module 320 is configured to randomly select a current signal acquisition channel to conduct as a current signal channel to be tested. As an example, the channel selection module 320 in this embodiment may use the STM32F107 chip as the core controller to perform channel selection, or may use the peripheral circuits of the STM32F107 chip to perform channel selection.

The current conversion module 330 is configured to collect the current signal on the channel under test of the current signal, and convert the current signal into a voltage signal. As an example, the current conversion module 330 in this embodiment may be composed of a current conversion circuit and a current sensor circuit.

The calibration calculation module 340 is configured to perform calibration calculation on the voltage signal to obtain a current value corresponding to the voltage signal. As an example, the calibration calculation module 340 in this embodiment may use the STM32F107 chip as the core controller to complete the calibration calculation, or may use the peripheral circuits of the STM32F107 chip to complete the calibration calculation.

The fault detection module 350 is used to compare the current value calculated by calibration with the first threshold value and the second threshold value respectively, and determine whether the solenoid valve to be tested is faulty; if the current value calculated by calibration is greater than the first threshold value threshold, or the current value calculated by calibration is less than the second threshold, it is determined that the electromagnetic valve under test is faulty; wherein, the first threshold is greater than the second threshold.

It can be seen that this embodiment does not require manual inspection and recording of solenoid valve current detection data, and can automatically complete the collection of multi-channel solenoid valve current data, and give an alarm to abnormal current data, prompting timely inspection and maintenance of the circuit. It is equivalent to that this embodiment provides a reliable real-time monitoring method for the operating state of the solenoid valve, which not only saves manpower and time, but also is simple to implement. The sensor needs to be buckled on the solenoid valve current line, the installation is simple and convenient, and it can meet the accuracy requirements of the solenoid valve current detection in the automation control system. At the same time, this embodiment can also perform data transmission with the configuration software of the host computer, and transmit the collected data and judgment results to the configuration software of the host computer through serial port communication, and monitor and display the current data and operating status of the solenoid valve in real time.

In an exemplary embodiment, the solenoid valve current detection system may further include an alarm module, configured to generate an alarm signal based on a current signal that causes the solenoid valve to be tested to fail when the solenoid valve to be tested fails ; Wherein, the alarm signal includes at least one of the following: optical signal, electrical control device signal. In this embodiment, the alarm module may be composed of LEDs and relays, for example, an LED light alarm circuit and a relay electric shock circuit. As an example, when generating the alarm signal based on the current signal that causes the electromagnetic valve to be tested to fail, it includes: generating an optical signal first, and then generating an electrical control device signal; or generating an electrical control device signal, and then generating an optical signal. That is, the optical signal in this embodiment may be a light-emitting diode light-emitting signal; the electrical control device signal may be a relay electric shock signal.

In an exemplary embodiment, after the alarm signal is generated, this embodiment may further include: assembling the current signal that causes the failure of the solenoid valve to be tested and the alarm signal to form a data frame; Whether there is a data frame request in the serial port; if there is a data frame request in the communication serial port of the upper computer, then the data frame is sent to the upper computer through the communication serial port of the upper computer for real-time monitoring, and from the multi-channel current signal acquisition channel Select another current signal acquisition channel as a new current signal channel to be tested, and determine whether the solenoid valve to be tested is faulty based on the current signal on the new current signal channel to be tested; if the host computer communication serial port does not exist data frame request, select another current signal acquisition channel from the multiple current signal acquisition channels as a new current signal channel to be tested, and determine the electromagnetic signal to be tested based on the current signal on the new current signal channel to be tested. Whether the valve is malfunctioning. It can be seen that, in this embodiment, the current data and operating status of the solenoid valve can be monitored in real time through the host computer, and when the solenoid valve fails, the maintenance personnel can be repaired in time. As an example, the host computer communication serial port in this embodiment may be an RS485 communication serial port.

In an exemplary embodiment, the solenoid valve current detection system may further include a storage module for storing the current signal and the converted voltage signal collected on each current signal acquisition channel; The solenoid valve failure detection result corresponding to the signal acquisition channel. As an example, the storage module in this embodiment may be composed of an EEPROM memory, or may be composed of an EEPROM memory and its associated circuits.

In another exemplary embodiment of the present application, as shown in Figure 4 and Figure 5, this embodiment also provides a solenoid valve current detection system, including: STM32 core control module, sensor module, alarm module, communication module, Storage modules and relay output modules. The STM32 core control module realizes data collection, processing, and calculation, and is the core component of the entire current diagnosis. Sensor modules mainly refer to outsourced current sensors and current-to-voltage conversion modules. The alarm module is mainly used to judge the light alarm signal when the circuit is broken or over-current, and the light alarm is mainly displayed by the LED indicator. The communication module uses RS485, uses MODBUS RTU mode communication protocol, and transmits current magnitude and alarm data information with external communication equipment. The memory module is mainly used for data storage. The relay output module is mainly used for electric shock output. In Figure 4, the current signal is the current signal of the solenoid valve to be detected. The current sensor is an instrument that converts a large current on the primary side into a small current on the secondary side for measurement based on the principle of electromagnetic induction. The conversion module converts the current signal into a voltage signal. . The STM32 control module calculates and analyzes the collected sensor data, and transmits the final data and judgment results to the configuration software of the upper computer for display. Have maintenance personnel repair it.

In Figure 5, the system uses the STM32F107 chip as the core controller, and a total of 16 current signal acquisition channels are set up. The STM32 control module samples the converted voltage signal through the internal ADC, and the collected data is converted according to the calibrated mathematical conversion relationship. The current value is calculated, and the current value is judged according to the built-in threshold value, and the LED light alarm is issued according to the judgment result. In terms of data communication, the system has designed a unified MODBUS communication protocol. The upper computer configuration software completes the sending of instructions and receiving data through the RS485 bus to realize real-time monitoring of solenoid valve current data.

The software design of this embodiment mainly includes main program design, current sensor data acquisition program design, alarm judgment program design, and RS485 communication program design. The flow chart of the main program is shown in Figure 2. After the system is powered on, the MCU first completes the initialization of the system clock, IO line, ADC, serial port, and EEPROM data reading. After the initialization is completed, choose to connect a current sensor to collect the voltage signal. The MCU will calculate the current value according to the calibrated mathematical conversion relationship of the collected data, and judge the current value according to the set threshold value, and issue an LED light alarm according to the judgment result. And relay electric shock output alarm, at the same time, the current signal data and alarm data are transmitted to the upper computer configuration software for display.

To sum up, the present application provides a solenoid valve current detection system. First, the current sensor is connected to the solenoid valve to be tested, so that there are multiple current signal acquisition channels between the current sensor and the solenoid valve to be tested. ; Then randomly select one current signal acquisition channel to be turned on as the current signal channel to be measured; then collect the current signal on the channel to be measured of the current signal, and convert the current signal into a voltage signal; The signal is calibrated and calculated to obtain the current value corresponding to the voltage signal; finally, the current value calculated by the calibration is compared with the first threshold and the second threshold respectively to determine whether the electromagnetic valve to be tested is faulty; if the calibration If the calculated current value is greater than the first threshold, or if the calculated current value is less than the second threshold, then it is determined that the electromagnetic valve under test is faulty; wherein the first threshold is greater than the second threshold. It can be seen that this system does not need manual inspection to record the current detection data of the solenoid valve, and can automatically complete the collection of multi-channel solenoid valve current data, and alarm the abnormal current data, prompting timely inspection and maintenance of the line. It is equivalent to that this system provides a reliable real-time monitoring method for the operating status of the solenoid valve, which not only saves manpower and time, but also is simple to implement. The sensor is buckled on the current line of the solenoid valve, which is simple and convenient to install, and can meet the accuracy requirements of the solenoid valve current detection in the automatic control system. At the same time, this system can also carry out data transmission with the configuration software of the upper computer, and transmit the collected data and judgment results to the configuration software of the upper computer through serial port communication, and monitor and display the current data and operating status of the solenoid valve in real time.

It should be noted that the solenoid valve current detection system provided in the above embodiment and the solenoid valve current detection method provided in the above embodiment belong to the same concept, and the specific operation methods of each module and unit have been described in detail in the method embodiment. description and will not be repeated here. In the actual application of the electromagnetic valve current detection system provided by the above embodiments, the above function distribution can be completed by different functional modules according to the needs, that is, the internal structure of the system is divided into different functional modules, so as to complete all or all of the above descriptions. Some functions are not limited here. Therefore, the present application effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments are only illustrative to illustrate the principles and effects of the present application, but are not intended to limit the present application. Any person familiar with the technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the application shall still be covered by the claims of the application.

It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present application to describe preset ranges, etc., these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from one another. For example, without departing from the scope of the embodiments of the present application, the first preset range may also be called the second preset range, and similarly, the second preset range may also be called the first preset range.

Claims (10)

1. a solenoid valve current detection method, is characterized in that, described method comprises the following steps: Connecting the current sensor to the solenoid valve to be tested, so that there are multiple current signal acquisition channels between the current sensor and the solenoid valve to be tested; Randomly select a current signal acquisition channel to conduct as the current signal channel to be tested; Collecting the current signal on the channel to be measured of the current signal, and converting the current signal into a voltage signal; performing calibration calculation on the voltage signal to obtain a current value corresponding to the voltage signal; Comparing the current value calculated by calibration with the first threshold value and the second threshold value respectively, to determine whether the solenoid valve to be tested is faulty; if the current value calculated by calibration is greater than the first threshold value, or the calculated current value by calibration If the current value is less than the second threshold, it is determined that the solenoid valve to be tested is faulty; wherein, the first threshold is greater than the second threshold. 2. The solenoid valve current detection method according to claim 1, wherein, if the solenoid valve to be tested does not fail, the method further comprises: selecting another path from the multi-channel current signal acquisition channel The current signal acquisition channel is used as a new current signal channel to be tested, and based on the current signal on the new current signal channel to be tested, it is determined whether the solenoid valve to be tested is faulty. 3. The solenoid valve current detection method according to claim 1, wherein if the solenoid valve to be tested breaks down, the method further comprises: generating a current signal based on the current signal that causes the solenoid valve to be tested to break down Alarm signal; wherein, the alarm signal includes at least one of the following: optical signal, electrical control device signal. 4. The electromagnetic valve current detection method according to claim 3, wherein, when generating an alarm signal based on the current signal causing the failure of the electromagnetic valve to be tested, comprising: first generating an optical signal, and then generating an electrical control device signal ; Alternatively, generate an electrical control device signal, and then generate an optical signal. 5 . The electromagnetic valve current detection method according to claim 3 or 4 , wherein the optical signal includes: a light-emitting diode light-emitting signal; and the electrical control device signal includes: a relay electric shock signal. 5 . 6. The solenoid valve current detection method according to claim 3 or 4, is characterized in that, after the alarm signal is generated, the method further comprises: Assembling the current signal and the alarm signal causing the failure of the solenoid valve to be tested to form a data frame; Determine whether there is a data frame request at the communication serial port of the upper computer; If there is a data frame request at the communication serial port of the upper computer, the data frame is sent to the upper computer through the communication serial port of the upper computer for real-time monitoring, and another current signal acquisition is selected from the multiple current signal acquisition channels The channel is used as a new current signal channel to be tested, and based on the current signal on the new current signal channel to be tested, it is determined whether the solenoid valve to be tested fails; If there is no data frame request at the communication serial port of the upper computer, then select another current signal acquisition channel from the multiple current signal acquisition channels as a new current signal channel to be tested, and based on the new current signal channel to be tested The electric current signal determines whether the electromagnetic valve under test fails. 7. The electromagnetic valve current detection method according to claim 1, characterized in that, the method further comprises: storing the current signal collected on each current signal acquisition channel and the converted voltage signal; and, storing and each The solenoid valve fault detection result corresponding to one current signal acquisition channel. 8. A solenoid valve current detection system, characterized in that the system includes: The communication module is used to connect the current sensor with the solenoid valve to be tested, so that there are multiple current signal acquisition channels between the current sensor and the solenoid valve to be tested; The channel selection module is used to randomly select a current signal acquisition channel to conduct as the current signal channel to be tested; A current conversion module, configured to collect the current signal on the channel to be measured of the current signal, and convert the current signal into a voltage signal; A calibration calculation module, configured to perform calibration calculation on the voltage signal to obtain a current value corresponding to the voltage signal; The fault detection module is used to compare the current value calculated by calibration with the first threshold value and the second threshold value respectively, and determine whether the solenoid valve to be tested is faulty; if the current value calculated by calibration is greater than the first threshold value , or the current value calculated by calibration is less than the second threshold, it is determined that the solenoid valve under test is faulty; wherein, the first threshold is greater than the second threshold. 9. The solenoid valve current detection system according to claim 8, characterized in that, the system also includes an alarm module, for when the solenoid valve to be tested breaks down, based on causing the solenoid valve to be tested to occur The faulty current signal generates an alarm signal; wherein, the alarm signal includes at least one of the following: optical signal, electrical control device signal. 10. The electromagnetic valve current detection system according to claim 8 or 9, wherein the system also includes a storage module for storing the current signal collected on each current signal collection channel and the converted voltage signal; and storing the electromagnetic valve fault detection result corresponding to each current signal acquisition channel.

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