CN111665408A - High-protection distribution box fault detection method and device - Google Patents
High-protection distribution box fault detection method and device Download PDFInfo
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- CN111665408A CN111665408A CN202010546672.8A CN202010546672A CN111665408A CN 111665408 A CN111665408 A CN 111665408A CN 202010546672 A CN202010546672 A CN 202010546672A CN 111665408 A CN111665408 A CN 111665408A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
Abstract
The invention discloses a high-protection distribution box fault detection method which comprises the steps that a circuit interface of a distribution box transmits a fault signal to a fault detection input end, the fault detection input end transmits the fault signal to a fault signal processing module, and the fault signal processing module performs primary processing on the fault signal; the fault signal processing module transmits the processed signal to the fault adjustment generating module, and the fault adjustment generating module adjusts a generating scheme after detecting the fault; the adjustment generation scheme is transmitted to a circuit interface of the distribution box through the output end of the fault adjustment scheme; in the process, the analog-digital module receives the output of the fault signal processing module and transmits the output to the processing module, the processing module sends a command to the feedback module after identification and processing, and the feedback module generates a feedback signal and transmits the feedback signal to the fault signal processing module and reconfigures the fault signal processing module. The invention further discloses a high-protection distribution box fault detection device applying the method.
Description
Technical Field
The invention relates to the field of distribution boxes, in particular to a method and a device for detecting faults of a high-protection distribution box.
Background
The traditional fault detection method for the distribution box adopts single solidified circuit detection, for example, a fault detection method and a fault detection device based on the distribution box disclosed in the chinese patent application CN201910908494.6, the method mainly includes acquiring image information of an electronic mechanism inside the distribution box and an auxiliary mechanism of the electronic mechanism; judging whether the electronic mechanism and the auxiliary mechanism are abnormal or not based on the image information of the electronic mechanism and the auxiliary mechanism; and when the electronic mechanism and/or the auxiliary mechanism are determined to be abnormal, performing abnormal alarm prompting. The detection device comprises an acquisition unit for acquiring the electronic mechanism in the distribution box and the image information of the auxiliary mechanism of the electronic mechanism, a judgment unit for judging whether the electronic mechanism and the auxiliary mechanism are abnormal or not based on the image information of the electronic mechanism and the auxiliary mechanism, and a processing unit for performing abnormal alarm prompt when the electronic mechanism and/or the auxiliary mechanism are determined to be abnormal. The technology disclosed in the patent is relatively common technology in the prior art, and in actual detection, such technology often encounters two problems, problem 1 is that a fault circuit may affect the performance of a detection circuit, because the fault type of the fault circuit is various, the detection circuit electrically connected with the fault circuit may also be abnormal when the fault circuit is abnormal, thereby affecting the performance of the detection circuit, problem 2 is that the fault of the fault circuit has diversity and unpredictability, the traditional detection circuit is relatively solidified, and at least the circuit itself is solidified on the configuration detection circuit, and the solidified detection circuit cannot substantially meet the requirements of detecting diversity and unpredictability.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a method and a device for detecting the fault of a high-protection distribution box.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the high-protection distribution box fault detection method comprises the following steps:
the circuit interface of the distribution box transmits a fault signal to a fault detection input end, the fault detection input end transmits the fault signal to a fault signal processing module, and the fault signal processing module performs primary processing on the fault signal;
the fault signal processing module transmits the processed signal to the fault adjustment generating module, and the fault adjustment generating module adjusts a generating scheme after detecting the fault;
the adjustment generation scheme is transmitted to a circuit interface of the distribution box through the output end of the fault adjustment scheme;
in the process, the analog-digital module receives the output of the fault signal processing module and transmits the output to the processing module, the processing module sends a command to the feedback module after identification and processing, and the feedback module generates a feedback signal and transmits the feedback signal to the fault signal processing module and reconfigures the fault signal processing module.
In a preferred or optional embodiment, before the above process, the external terminal inputs diversified detection rules to the fault adjustment generating module through the external terminal communication module, and the storage module stores the diversified detection rules; in the above process, the fault adjustment generating module accesses the storage module to acquire diversified detection rules, and uses the newly acquired diversified detection rules for a new detection process.
The device applying the method comprises a fault detection input end and a fault adjustment scheme output end which are arranged on a circuit interface of the distribution box, and also comprises a fault signal processing module for primarily processing fault signals, a fault adjustment generating module for adjusting the generating scheme after fault detection, a modulus module for receiving the output of the fault signal processing module and transmitting the output to the processing module, a processing module for identifying and processing the fault signal, a feedback module for receiving the signal of the processing module, generating a feedback signal and transmitting the feedback signal to the fault signal processing module, the fault signal processing module is respectively connected with the fault adjustment generating module, the analog-digital module and the fault detection input end, the fault adjustment generating module is connected with the output end of the fault adjustment scheme, the analog-digital module is further connected with the processing module, and the feedback module is respectively connected with the processing module and the fault signal processing module.
In a preferred or optional embodiment, the fault signal processing module adopts a chopper-stabilized operational amplifier chip circuit, the analog-to-digital module adopts a common analog-to-digital conversion circuit, the digital potentiometer circuit is connected with two ends of the negative feedback resistor and controls the resistance value of the negative feedback resistor so as to adjust the gain of the chopper-stabilized operational amplifier, so that the performance of the detection circuit is stable, and the connection is electrically connected.
In a preferred or optional embodiment, the fault adjustment generating module adopts a single chip microcomputer chip circuit, and the single chip microcomputer chip circuit receives an output end signal of the chopper-stabilized operational amplifier chip circuit, generates an adjustment signal through operation, and outputs the adjustment signal to the fault adjustment scheme output end so as to adjust the power distribution box circuit by the fault adjustment scheme output end.
In a preferred or optional embodiment, the device applying the method further includes an external terminal communication module, a display module, and a storage module, the external terminal communication module is connected to the fault adjustment generating module and is configured to input diversified detection rules to the fault adjustment generating module, the storage module is connected to the fault adjustment generating module and is configured to store the diversified detection rules, and the display module is configured to display fault detection data.
In a preferred or optional embodiment, the fault adjustment generating module employs an stm32 single chip microcomputer, the external terminal communication module employs an ethernet control chip circuit, the display module employs a liquid crystal display circuit supporting a serial peripheral interface, the storage module employs a flash memory chip circuit supporting a serial peripheral interface, and the stm32 single chip microcomputer is electrically connected to the ethernet control chip circuit, the liquid crystal display circuit, and the flash memory chip circuit, respectively.
In a preferred or optional embodiment, the ethernet control chip circuit is electrically connected to the stm32 single chip microcomputer, the Ethernet control chip (U1) is provided with 3 grounding pins, pin 1, pin 2 and pin 12, pin 11 and pin 10 are coupled with a power supply and connected with pin 2 of the low-dropout linear regulator, pin 1 and pin 3 of the linear regulator are coupled with a +5V power supply, a capacitor, a resistor, an inductor and a diode element and connected with pin 11 and pin 10 of the Ethernet control chip (U1) to be finally grounded, other pins of the Ethernet control chip (U1) are connected with a control pin and a data pin of the stm32 singlechip, and particularly, the other pins of the Ethernet control chip (U1) and the transmission eth mos, eth scli, eth scs, eth int, ethhreset and eth miso signals of the stm32 singlechip are used, wherein the eth int signal controls the transmission of other signals through the level.
In a preferred or optional embodiment, the liquid crystal display circuit is electrically connected with the stm32 single chip microcomputer, specifically, the liquid crystal display circuit is connected with a terminal P1, the terminal P1 is provided with 4 pins, two of the pins are connected with a power supply, and the other two pins are electrically connected with the pins of the stm32 single chip microcomputer and transmit lcdsck and lcddat signals.
In a preferred or optional embodiment, the flash memory chip circuit is electrically connected to the stm32 single chip microcomputer, specifically, pin 3, pin 7, and pin 8 of the flash memory chip circuit (U2) are connected to a +3.3V power supply, pin 4 of the flash memory chip circuit (U2) is grounded, and the other pins of the flash memory chip circuit (U2) are electrically connected to pins of the stm32 single chip microcomputer and transmit flash cs, flash miso, flash sck, and flash mosi signals.
The invention has the advantages that the fault signal is primarily processed by the fault signal processing module, then the processed signal is transmitted to the fault adjustment generating module by the fault signal processing module, the fault adjustment generating module adjusts the generating scheme after the fault detection, the adjustment generating scheme is transmitted to the circuit interface of the distribution box through the output end of the fault adjustment scheme, the analog-digital module receives the output of the fault signal processing module and transmits the output to the processing module, the processing module sends a command to the feedback module after identification and processing, the feedback module generates a feedback signal and transmits the feedback signal to the fault signal processing module and reconfigures the fault signal processing module, thereby solving the problem that the fault circuit affects the performance of the detection circuit, and in the specific technical means, namely, the external terminal of the invention inputs diversified detection rules to the fault adjustment generating module through the external terminal communication module on the more detailed part of the scheme, the storage module stores diversified detection rules, wherein the fault adjustment generation module accesses the storage module to acquire the diversified detection rules and applies the newly acquired diversified detection rules to a new detection process to solve the problem that the solidified detection circuit cannot meet the requirements for detection diversification and unpredictability.
The description of the figures in the drawings,
FIG. 1 is a block diagram of the components of an embodiment of the apparatus of the present application;
FIG. 2 is a block diagram of the connection between the fault adjustment generating module and other modules of the apparatus of the present application;
FIG. 3 is a schematic diagram of an embodiment of an Ethernet control chip circuit configuration;
FIG. 4 is a schematic diagram of a circuit configuration of an LCD panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a flash memory chip circuit configuration according to an embodiment of the apparatus of the present application;
fig. 6 is a schematic flow chart of an embodiment of the method of the present application.
The invention is further illustrated with reference to the following figures and examples.
Detailed Description
In a specific implementation, the method for detecting a fault of a high-protection distribution box according to the present application is shown in fig. 6, and includes: the circuit interface of the distribution box transmits a fault signal to a fault detection input end, the fault detection input end transmits the fault signal to a fault signal processing module, and the fault signal processing module performs primary processing on the fault signal; the fault signal processing module transmits the processed signal to the fault adjustment generating module, and the fault adjustment generating module adjusts a generating scheme after detecting the fault; the adjustment generation scheme is transmitted to a circuit interface of the distribution box through the output end of the fault adjustment scheme; in the process, the analog-digital module receives the output of the fault signal processing module and transmits the output to the processing module, the processing module sends a command to the feedback module after identification and processing, and the feedback module generates a feedback signal and transmits the feedback signal to the fault signal processing module and reconfigures the fault signal processing module. The problem that the performance of the detection circuit is influenced by the fault circuit is solved, the problem is that the performance of the detection circuit can be influenced by the fault circuit, because the fault type of the fault circuit is various, the detection circuit electrically connected with the fault circuit can be abnormal when the fault circuit is abnormal, so that the performance of the detection circuit is influenced, however, in the implementation, a feedback signal is generated by the feedback module and is transmitted to the fault signal processing module, the fault signal processing module is reconfigured, and then the fault adjustment generation module adjusts a generation scheme after the fault detection; the adjustment generation scheme is transmitted to the circuit interface of the distribution box through the output end of the fault adjustment scheme, and the fault detection circuit is adjusted in a targeted manner through the specific type of the fault, so that the problem that the performance of the detection circuit is influenced by the fault circuit is solved.
In implementation, before the process of the above embodiment, the external terminal inputs diversified detection rules to the fault adjustment generating module through the external terminal communication module, and the storage module stores the diversified detection rules; in the above process, the fault adjustment generating module accesses the storage module to acquire diversified detection rules, and uses the newly acquired diversified detection rules for a new detection process. The essence of this embodiment is that the fault adjustment generation module acquires diversified detection rules, and use newly acquired diversified detection rules for new testing process, wherein diversified detection rules source external terminal, and external terminal can adopt the server of networking, and accept the information maintenance update of external terminal personnel, and the external terminal can save the latest maximum detection rules in order to satisfy diversified demand, and finally this detection rule has reconfigured detection circuitry, so solved the problem that solidified detection circuitry can't satisfy detection diversification and unpredictable demand.
As shown in FIG. 1, the high-protection distribution box fault detection device applying the method comprises a fault detection input end and a fault adjustment scheme output end which are arranged at a circuit interface of the distribution box, and further comprises a fault signal processing module for primarily processing fault signals, a fault adjustment generation module for adjusting a generation scheme after fault detection, a modulus module for receiving the output of the fault signal processing module and transmitting the output of the fault signal processing module to the processing module, a processing module for identifying and processing fault signals, and a feedback module for receiving signals of the processing module and generating feedback signals and transmitting the feedback signals to the fault signal processing module, wherein the fault signal processing module is respectively connected with the fault adjustment generation module, the modulus module and the fault detection input end, the fault adjustment generation module is connected with the output end of the fault adjustment scheme, the modulus module is also connected with the processing module, and the feedback module is respectively connected with the processing module, And the fault signal processing module is connected. In implementation, a circuit interface of the distribution box transmits a fault signal to a fault detection input end, the fault detection input end transmits the fault signal to a fault signal processing module, and the fault signal processing module performs primary processing on the fault signal; the fault signal processing module transmits the processed signal to the fault adjustment generating module, and the fault adjustment generating module adjusts a generating scheme after detecting the fault; the adjustment generation scheme is transmitted to a circuit interface of the distribution box through the output end of the fault adjustment scheme; in the process, the analog-digital module receives the output of the fault signal processing module and transmits the output to the processing module, the processing module sends a command to the feedback module after identification and processing, and the feedback module generates a feedback signal and transmits the feedback signal to the fault signal processing module and reconfigures the fault signal processing module.
In specific implementation, the fault signal processing module adopts a chopper-stabilized operational amplifier chip circuit, the analog-digital module adopts a common analog-digital conversion circuit, the processing module adopts a single chip microcomputer chip circuit, the feedback module adopts a digital potentiometer chip circuit, the output end of the chopper-stabilized operational amplifier chip circuit is connected with the analog-digital conversion circuit, the analog-digital conversion circuit is connected with the single chip microcomputer chip circuit, the single chip microcomputer chip circuit is connected with the digital potentiometer chip circuit, the chopper-stabilized operational amplifier chip circuit is at least provided with a negative feedback resistor, the output end of the digital potentiometer chip circuit is connected with two ends of the negative feedback resistor and controls the resistance value of the negative feedback resistor so as to adjust the gain of the chopper-stabilized operational amplifier, so that the performance of the detection circuit is stable, and the connections are all electric connections. In specific implementation, the fault adjustment generation module adopts a single chip microcomputer chip circuit, the single chip microcomputer chip circuit receives an output end signal of the chopper-stabilized operational amplifier chip circuit, generates an adjustment signal through operation, and outputs the adjustment signal to the output end of the fault adjustment scheme, so that the output end of the fault adjustment scheme adjusts the distribution box circuit.
As shown in fig. 2, the high-protection distribution box fault detection device applying the method further includes an external terminal communication module, a display module and a storage module, the external terminal communication module is connected with the fault adjustment generation module and used for inputting diversified detection rules to the fault adjustment generation module, the storage module is connected with the fault adjustment generation module and used for storing the diversified detection rules, and the display module is used for displaying fault detection data. In implementation, the external terminal inputs diversified detection rules to the fault adjustment generation module through the external terminal communication module, and the storage module stores the diversified detection rules; in the above process, the fault adjustment generating module accesses the storage module to acquire diversified detection rules, and uses the newly acquired diversified detection rules for a new detection process.
The fault adjustment generating module adopts a stm32 single chip microcomputer, the outer terminal communication module adopts an Ethernet control chip circuit, the display module adopts a liquid crystal display circuit supporting a serial peripheral interface, the storage module adopts a flash memory chip circuit supporting the serial peripheral interface, and the stm32 single chip microcomputer is respectively and electrically connected with the Ethernet control chip circuit, the liquid crystal display circuit and the flash memory chip circuit.
In a more specific implementation, and to disclose specific implementation content, as shown in fig. 3, the ethernet control chip circuit is electrically connected to the stm32 single chip microcomputer, specifically, the ethernet control chip (U1) has 3 ground pins, pin 1, pin 2 and pin 12, pin 11 and pin 10 are coupled to a power supply and connected to pin 2 of the low dropout regulator, pin 1 and pin 3 of the linear regulator are coupled to a +5V power supply, a capacitor, a resistor, an inductor, and a diode, and are connected to the ethernet control chip (U1) pin 11 and pin 10 to be finally grounded, other pins of the ethernet control chip (U1) are connected to a control pin and a data pin of the stm32 single chip microcomputer, and specifically, other pins of the ethernet control chip (U1) are connected to the transmission eth mos, eth scli, eth scs, eth int, eth rest, eth miso signals of the stm32 single chip microcomputer, the eth int signal therein controls other signal transmission by level.
In a more specific implementation, and in order to disclose specific implementation content, as shown in fig. 4, the liquid crystal display circuit is electrically connected to the stm32 single chip microcomputer, specifically, the liquid crystal display circuit is connected to the terminal P1, the terminal P1 is provided with 4 pins, two of the pins are connected to the power supply, and the other two pins are electrically connected to the pins of the stm32 single chip microcomputer and transmit lcdsck and lcddat signals.
In a more specific implementation, and in order to disclose specific implementation content, as shown in fig. 5, the flash memory chip circuit is electrically connected to the stm32 single chip microcomputer, specifically, pin 3, pin 7, and pin 8 of the flash memory chip circuit (U2) are connected to a +3.3V power supply, pin 4 of the flash memory chip circuit (U2) is grounded, and the other pins of the flash memory chip circuit (U2) are electrically connected to the stm32 single chip microcomputer pin and transmit flash cs, flash miso, flash sck, and flash mosi signals.
Claims (10)
1. The high-protection distribution box fault detection method is characterized by comprising the following steps of:
the circuit interface of the distribution box transmits a fault signal to a fault detection input end, the fault detection input end transmits the fault signal to a fault signal processing module, and the fault signal processing module performs primary processing on the fault signal;
the fault signal processing module transmits the processed signal to the fault adjustment generating module, and the fault adjustment generating module adjusts a generating scheme after detecting the fault;
the adjustment generation scheme is transmitted to a circuit interface of the distribution box through the output end of the fault adjustment scheme;
in the process, the analog-digital module receives the output of the fault signal processing module and transmits the output to the processing module, the processing module sends a command to the feedback module after identification and processing, and the feedback module generates a feedback signal and transmits the feedback signal to the fault signal processing module and reconfigures the fault signal processing module.
2. A method for detecting a fault in a highly protective electrical distribution box, comprising the steps of claim 1 prior to the steps of: the external terminal machine inputs diversified detection rules to the fault adjustment generating module through the external terminal machine communication module, and the storage module stores the diversified detection rules; in the above process, the fault adjustment generating module accesses the storage module to acquire diversified detection rules, and uses the newly acquired diversified detection rules for a new detection process.
3. The high-protection distribution box fault detection device applying the method of any one of claims 1-2, characterized by comprising a fault detection input end and a fault adjustment scheme output end which are arranged at a circuit interface of the distribution box, a fault signal processing module for primarily processing a fault signal, a fault adjustment generation module for adjusting a generation scheme after fault detection, an analog-digital module for receiving the output of the fault signal processing module and transmitting the output to the processing module, a processing module for identifying and processing the fault signal, and a feedback module for receiving the signal of the processing module and generating a feedback signal and transmitting the feedback signal to the fault signal processing module, wherein the fault signal processing module is respectively connected with the fault adjustment generation module, the analog-digital module and the fault detection input end, the fault adjustment generation module is connected with the fault adjustment scheme output end, and the analog-digital module is further connected with the processing module, and the feedback module is respectively connected with the processing module and the fault signal processing module.
4. The apparatus of claim 3, wherein the fault signal processing module employs a chopper-stabilized operational amplifier chip circuit, the analog-to-digital module employs a common analog-to-digital conversion circuit, the processing module employs a single chip microcomputer chip circuit, the feedback module employs a digital potentiometer chip circuit, the output terminal of the chopper-stabilized operational amplifier chip circuit is connected to the analog-to-digital conversion circuit, the analog-to-digital conversion circuit is connected to the single chip microcomputer chip circuit, the single chip microcomputer chip circuit is connected to the digital potentiometer chip circuit, the chopper-stabilized operational amplifier chip circuit is at least configured with a negative feedback resistor, the output terminal of the digital potentiometer chip circuit is connected to both ends of the negative feedback resistor and controls the resistance value of the negative feedback resistor to adjust the gain of the chopper-stabilized operational amplifier, so that the performance of the detection circuit is stabilized, the connections are all electrical connections.
5. The device for detecting the fault of the high-protection distribution box according to claim 3, wherein the fault adjustment generating module adopts a single chip microcomputer circuit, the single chip microcomputer circuit receives the output end signal of the chopper-stabilized operational amplifier chip circuit, generates an adjustment signal through operation, and outputs the adjustment signal to the output end of the fault adjustment scheme, so as to adjust the distribution box circuit by the output end of the fault adjustment scheme.
6. The device for detecting the faults of the high-protection distribution box according to claim 3, further comprising an external terminal communication module, a display module and a storage module, wherein the external terminal communication module is connected with the fault adjustment generation module and used for inputting diversified detection rules to the fault adjustment generation module, the storage module is connected with the fault adjustment generation module and used for storing the diversified detection rules, and the display module is used for displaying fault detection data.
7. The device for detecting the malfunction of the high-protection distribution box according to claim 5, wherein the malfunction adjustment generating module employs stm32 single chip microcomputer, the external terminal communication module employs an ethernet control chip circuit, the display module employs a liquid crystal display circuit supporting a serial peripheral interface, the storage module employs a flash memory chip circuit supporting a serial peripheral interface, and the stm32 single chip microcomputer is electrically connected to the ethernet control chip circuit, the liquid crystal display circuit, and the flash memory chip circuit, respectively.
8. The device for detecting the fault of the high-protection distribution box according to claim 7, wherein the Ethernet control chip circuit is electrically connected to the stm32 single chip microcomputer, specifically, the Ethernet control chip (U1) is provided with 3 ground pins, pin 1, pin 2 and pin 12, pin 11 and pin 10 are coupled to a power supply and connected to pin 2 of the low dropout linear regulator, pin 1 and pin 3 of the linear regulator are coupled to a +5V power supply, a capacitor, a resistor, an inductor, and a diode element and connected to pin 11 and pin 10 of the Ethernet control chip (U1) for final grounding, the other pins of the Ethernet control chip (U1) are connected to a control pin and a data pin of the stm32 single chip microcomputer, and specifically, the other pins of the Ethernet control chip (U1) are connected to the transmission ethmos, eth lisc, eth scs, eth int, eth rest, eth so mi signal of the stm32 single chip microcomputer, the eth int signal therein controls other signal transmission by level.
9. The device for detecting the fault of the high-protection distribution box according to claim 7, wherein the liquid crystal display circuit is electrically connected with the stm32 single chip microcomputer, specifically, the liquid crystal display circuit is connected with a terminal P1, the terminal P1 is provided with 4 pins, two pins are connected with a power supply, and the other two pins are electrically connected with pins of the stm32 single chip microcomputer and transmit lcdsck and lcddat signals.
10. The device for detecting the fault of the high-protection distribution box according to claim 7, wherein the flash memory chip circuit is electrically connected with the stm32 single chip microcomputer, specifically, the pin 3, the pin 7 and the pin 8 of the flash memory chip circuit (U2) are connected with a +3.3V power supply, the pin 4 of the flash memory chip circuit (U2) is grounded, and the other pins of the flash memory chip circuit (U2) are electrically connected with the stm32 single chip microcomputer pin and transmit flash cs, flash miso, flash sck and flash mosi signals.
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| CN112178213A (en) * | 2020-09-30 | 2021-01-05 | 赵鑫 | High-temperature high-pressure environment electromagnetic valve |
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Application publication date: 20200915 |