CN110687847A - Control circuit and implementation method - Google Patents
Control circuit and implementation method Download PDFInfo
- Publication number
- CN110687847A CN110687847A CN201911025625.2A CN201911025625A CN110687847A CN 110687847 A CN110687847 A CN 110687847A CN 201911025625 A CN201911025625 A CN 201911025625A CN 110687847 A CN110687847 A CN 110687847A
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- Prior art keywords
- chip
- electromagnetic valve
- arm processor
- driving chip
- valve driving
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Automation & Control Theory (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
The present invention provides a control circuit, comprising: the system comprises an ARM processor chip N1, a signal amplification chip N2, a power conversion chip N3, an indicator lamp VD2, a buzzer SP1, a driving chip Q3, an electromagnetic valve driving chip Q1, an electromagnetic valve driving chip Q2, an electromagnetic valve driving chip VT1 and a relay K1; the electromagnetic valve open circuit and short circuit detection and driving are integrated, regular self-detection of the electromagnetic valve can be achieved, and before the electromagnetic valve is controlled to act, one-time self-detection operation is performed, so that potential safety hazards are avoided.
Description
Technical Field
The invention relates to the field of circuits, in particular to a control circuit and an implementation method.
Background
The electromagnetic valve is widely applied to production equipment, water plants, steam pipelines, natural gas pipelines and chemical equipment, and mainly used for switching and blocking water paths and gas paths. Whether the electromagnetic valve works normally or not is directly related to production and life safety. But at present, no good online self-checking equipment for the electromagnetic valve exists, the detection can be triggered manually, and the detection is not quick and efficient. Therefore, it is necessary to develop a control circuit integrating the open circuit and short circuit detection of the solenoid valve and the driving.
Disclosure of Invention
The invention aims to solve the problems and provides a control circuit and an implementation method, wherein an ARM processor chip N1, a signal amplification chip N2, a power conversion chip N3, an indicator lamp VD2, a buzzer SP1, a driving chip Q3, an electromagnetic valve driving chip Q1, an electromagnetic valve driving chip Q2, an electromagnetic valve driving chip VT1 and a relay K1 are adopted; the electromagnetic valve open circuit and short circuit detection and driving are integrated, regular self-detection of the electromagnetic valve can be achieved, and before the electromagnetic valve is controlled to act, one-time self-detection operation is performed, so that potential safety hazards are avoided.
In order to achieve the purpose, the invention adopts the following technical scheme.
A control circuit, comprising: the system comprises an ARM processor chip N1, a signal amplification chip N2, a power conversion chip N3, an indicator lamp VD2, a buzzer SP1, a driving chip Q3, an electromagnetic valve driving chip Q1, an electromagnetic valve driving chip Q2, an electromagnetic valve driving chip VT1 and a relay K1; the ARM processor chip N1 is respectively connected with the power conversion chip N3, the electromagnetic valve driving chip Q1, the electromagnetic valve driving chip Q2, the electromagnetic valve driving chip VT1, the relay K1, the indicator lamp VD2 and the buzzer SP1, and is used for controlling the work of each part of the circuit; the power supply conversion chip N3 is used for converting the input power supply voltage into the voltage which can be normally used by the circuit and then supplying power to all parts of the control circuit; the electromagnetic valve driving chip Q1, the electromagnetic valve driving chip Q2, the electromagnetic valve driving chip VT1 and the relay K1 are used for self-checking and driving of the electromagnetic valve; the signal amplification chip N2 is used for collecting and amplifying the electromagnetic valve control signal and transmitting the signal to the ARM processor chip N1 for processing; the indicator lamp VD2 is used for giving an alarm to external light when the electromagnetic valve is detected to be abnormal; the buzzer SP1 is used for carrying out high-decibel sound alarm when the electromagnetic valve is detected to be abnormal.
Furthermore, pins 19, 40 and 20 of the ARM processor chip N1 are respectively connected to pin 4 of the signal amplification chip N2, the base of the solenoid valve driving chip VT1, the gate of the solenoid valve driving chip Q1 and the gate of the solenoid valve driving chip Q2, and are used for self-checking and driving of the solenoid valve.
Furthermore, pins 16 and 17 of the ARM processor chip N1 are respectively connected with pin 3 and pin 1 of the indicator lamp VD2 and used for light alarm indication.
Furthermore, pins 34 and 37 of the ARM processor chip N1 are respectively connected with pins 3 and 4 of a connector XS3, and are used for downloading and debugging programs.
Further, a pin 46 of the ARM processor chip N1 is connected with a grid electrode of the driving chip Q3 of the buzzer SP1, and high-decibel sound alarm is carried out when the abnormality of the electromagnetic valve is detected.
A method for realizing a control circuit, which can carry out self-checking on an electromagnetic valve when the control circuit runs, comprises the following steps: the 20 pin of the ARM processor chip N1 outputs low level; the electromagnetic valve driving chip Q1 is not conducted with the electromagnetic valve driving chip Q2; the 40 pin of the ARM processor chip N1 outputs high level; the electromagnetic valve driving chip VT1 is conducted; the relay K1 is used for attracting; the power supply conversion chip N3 supplies power; the signal amplification chip N2 amplifies the voltage division signal of the internal resistance of the electromagnetic valve; the amplified signal is output to a pin 19 of an ARM processor chip N1 through a pin 4 of the chip N2; the ARM processor chip N1 collects the voltage and analyzes whether the electromagnetic valve is normal or not through an algorithm.
Further, when the electromagnetic valve is in a normal self-checking state, the method comprises the following steps: the 16 pin of the ARM processor chip N1 outputs low level; the green light of the indicator lamp VD2 lights up.
Further, when the electromagnetic valve is abnormal by self-detection, the method comprises the following steps: a pin 17 of the ARM processor chip N1 outputs a low level; the red light of the indicator lamp VD2 is lightened; pin 46 of the ARM processor chip N1 outputs high level; the buzzer SP1 sounds a high decibel sound alarm.
Further, when the electromagnetic valve is electrified, the method comprises the following steps: the electromagnetic valve is self-checked normally; the 20 pin of the ARM processor chip N1 outputs high level; the electromagnetic valve driving chip Q1 is conducted with the electromagnetic valve driving chip Q2; short circuit R4/1K resistance; the 40 pins of the ARM processor chip output high level; the electromagnetic valve driving chip VT1 is conducted; the relay K1 is used for attracting; the electromagnetic valve is electrified to act.
The control circuit and the realization method have the positive effects that:
(1) the invention adopts an ARM processor chip N1, a signal amplification chip N2, a power conversion chip N3, an indicator lamp VD2, a buzzer SP1, a driving chip Q3, an electromagnetic valve driving chip Q1, an electromagnetic valve driving chip Q2, an electromagnetic valve driving chip VT1 and a relay K1; the electromagnetic valve open circuit and short circuit detection and driving are integrated, regular self-detection of the electromagnetic valve can be achieved, and before the electromagnetic valve is controlled to act, one-time self-detection operation is performed, so that potential safety hazards are avoided.
(2) When the existing electromagnetic valve works, the working state of the electromagnetic valve cannot be effectively monitored. The invention can effectively carry out regular self-inspection on the electromagnetic valve and find faults in advance. And before the action of the electromagnetic valve is controlled, one-time self-checking operation is carried out, so that potential safety hazards are avoided. When the detection is abnormal, the alarm can be given in time to inform the client of maintenance in time.
Drawings
Fig. 1 is a circuit connection block diagram according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a power conversion chip according to an embodiment of the invention.
Fig. 3 is a circuit diagram of a self-test and driving part of a solenoid valve according to an embodiment of the invention.
Fig. 4 is a circuit diagram of an audible alarm portion provided in an embodiment of the present invention.
Fig. 5 is a circuit diagram of a light indication portion according to an embodiment of the present invention.
Fig. 6 is a circuit diagram of a program downloading portion according to an embodiment of the present invention.
FIG. 7 is a circuit diagram of an ARM processor according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of a self-test of a solenoid valve according to an embodiment of the present invention.
Fig. 9 is a schematic diagram illustrating a normal self-test of the solenoid valve according to the embodiment of the present invention.
Fig. 10 is a schematic diagram of a solenoid valve self-checking anomaly according to an embodiment of the present invention.
Fig. 11 is a schematic diagram of the energization of the solenoid valve according to the embodiment of the present invention.
Detailed Description
The following provides a specific embodiment of a control circuit and an implementation method thereof in conjunction with the accompanying drawings, but it should be noted that: the described embodiments are not intended to limit the practice of the invention. All similar structures and similar variations thereof adopting the invention shall fall within the scope of the invention. The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced.
See fig. 1-7. A control circuit, comprising: the system comprises an ARM processor chip N1, a signal amplification chip N2, a power conversion chip N3, an indicator lamp VD2, a buzzer SP1, a driving chip Q3, an electromagnetic valve driving chip Q1, an electromagnetic valve driving chip Q2, an electromagnetic valve driving chip VT1 and a relay K1; the ARM processor chip N1 is respectively connected with the power conversion chip N3, the electromagnetic valve driving chip Q1, the electromagnetic valve driving chip Q2, the electromagnetic valve driving chip VT1, the relay K1, the indicator lamp VD2 and the buzzer SP1, and is used for controlling the work of each part of the circuit; the power supply conversion chip N3 is used for converting the input power supply voltage into the voltage which can be normally used by the circuit and then supplying power to all parts of the control circuit; the electromagnetic valve driving chip Q1, the electromagnetic valve driving chip Q2, the electromagnetic valve driving chip VT1 and the relay K1 are used for self-checking and driving of the electromagnetic valve; the signal amplification chip N2 is used for collecting and amplifying the electromagnetic valve control signal and transmitting the signal to the ARM processor chip N1 for processing; the indicator lamp VD2 is used for giving an alarm to external light when the electromagnetic valve is detected to be abnormal; the buzzer SP1 is used for carrying out high-decibel sound alarm when the electromagnetic valve is detected to be abnormal.
The model of the ARM processor chip N1 is STM32F030C8T 6. The model of the signal amplification chip N2 is RS321 BXF. The model of the power management chip N3 is AMS 1117-3.3. The model of the electromagnetic valve driving chip Q1 and the model of the electromagnetic valve driving chip Q2 are AO 3401A. The model number of the electromagnetic valve driving chip VT1 is SS 8050. The power conversion chip N3 converts the input voltage VCC into 3.3V which can be used by the circuit, and then supplies power to the control circuit.
And pins 16 and 17 of the ARM processor chip N1 are respectively connected with pin 3 and pin 1 of the indicator lamp VD2 and used for light alarm indication.
And a pin 46 of the ARM processor chip N1 is connected with a grid electrode of the driving chip Q3 of the buzzer SP1, and high-decibel sound alarm is carried out when the abnormality of the electromagnetic valve is detected.
See fig. 8. When the control circuit carries out self-checking on the electromagnetic valve, the method comprises the following steps: the 20 pin of the ARM processor chip N1 outputs low level; the electromagnetic valve driving chip Q1 is not conducted with the electromagnetic valve driving chip Q2; the 40 pin of the ARM processor chip N1 outputs high level; the electromagnetic valve driving chip VT1 is conducted; the relay K1 is used for attracting; the power supply conversion chip N3 supplies power; the signal amplification chip N2 amplifies the voltage division signal of the internal resistance of the electromagnetic valve; the amplified signal is output to a pin 19 of an ARM processor chip N1 through a pin 4 of the chip N2; the ARM processor chip N1 collects the voltage and analyzes whether the electromagnetic valve is normal or not through an algorithm.
See fig. 9. When the electromagnetic valve is in a normal self-checking state, the method comprises the following steps: the 16 pin of the ARM processor chip N1 outputs low level; the green light of the indicator lamp VD2 lights up.
See fig. 10. When the electromagnetic valve is abnormal by self-detection, the method comprises the following steps: a pin 17 of the ARM processor chip N1 outputs a low level; the red light of the indicator lamp VD2 is lightened; pin 46 of the ARM processor chip N1 outputs high level; the buzzer SP1 sounds a high decibel sound alarm.
See fig. 11. When the electromagnetic valve is electrified, the method comprises the following steps: the electromagnetic valve is self-checked normally; the 20 pin of the ARM processor chip N1 outputs high level; the electromagnetic valve driving chip Q1 is conducted with the electromagnetic valve driving chip Q2; short circuit R4/1K resistance; the 40 pins of the ARM processor chip output high level; the electromagnetic valve driving chip VT1 is conducted; the relay K1 is used for attracting; the electromagnetic valve is electrified to act.
Claims (9)
1. A control circuit, comprising: the system comprises an ARM processor chip N1, a signal amplification chip N2, a power conversion chip N3, an indicator lamp VD2, a buzzer SP1, a driving chip Q3, an electromagnetic valve driving chip Q1, an electromagnetic valve driving chip Q2, an electromagnetic valve driving chip VT1 and a relay K1; the ARM processor chip N1 is respectively connected with the power conversion chip N3, the electromagnetic valve driving chip Q1, the electromagnetic valve driving chip Q2, the electromagnetic valve driving chip VT1, the relay K1, the indicator lamp VD2 and the buzzer SP1, and is used for controlling the work of each part of the circuit; the power supply conversion chip N3 is used for converting the input power supply voltage into the voltage which can be normally used by the circuit and then supplying power to all parts of the control circuit; the electromagnetic valve driving chip Q1, the electromagnetic valve driving chip Q2, the electromagnetic valve driving chip VT1 and the relay K1 are used for self-checking and driving of the electromagnetic valve; the signal amplification chip N2 is used for collecting and amplifying the electromagnetic valve control signal and transmitting the signal to the ARM processor chip N1 for processing; the indicator lamp VD2 is used for giving an alarm to external light when the electromagnetic valve is detected to be abnormal; the buzzer SP1 is used for carrying out high-decibel sound alarm when the electromagnetic valve is detected to be abnormal.
2. The control circuit of claim 1, wherein pins 19, 40 and 20 of the ARM processor chip N1 are respectively connected to pin 4 of the signal amplification chip N2, the base of the solenoid valve driving chip VT1, the gate of the solenoid valve driving chip Q1 and the gate of the solenoid valve driving chip Q2, and are used for solenoid valve self-test and driving.
3. The control circuit of claim 1, wherein pins 16 and 17 of the ARM processor chip N1 are respectively connected with pins 3 and 1 of the indicator lamp VD2 for light alarm indication.
4. The control circuit of claim 1, wherein pins 34 and 37 of the ARM processor chip N1 are connected to pins 3 and 4 of a connector XS3, respectively, for downloading and debugging programs.
5. The control circuit of claim 1, wherein a pin 46 of the ARM processor chip N1 is connected to a gate of the driving chip Q3 of the buzzer SP1, and a high decibel sound alarm is generated when an abnormality of the solenoid valve is detected.
6. A method for implementing a control circuit according to claim 1, wherein the control circuit performs a self-test on the solenoid valve during operation, comprising the steps of:
the 20 pin of the ARM processor chip N1 outputs low level;
the electromagnetic valve driving chip Q1 is not conducted with the electromagnetic valve driving chip Q2;
the 40 pin of the ARM processor chip N1 outputs high level;
the electromagnetic valve driving chip VT1 is conducted;
the relay K1 is used for attracting;
the power supply conversion chip N3 supplies power;
the signal amplification chip N2 amplifies the voltage division signal of the internal resistance of the electromagnetic valve;
the amplified signal is output to a pin 19 of an ARM processor chip N1 through a pin 4 of the chip N2;
the ARM processor chip N1 collects the voltage and analyzes whether the electromagnetic valve is normal or not through an algorithm.
7. The method for implementing the control circuit according to claim 6, wherein when the solenoid valve is in a normal self-check state, the method comprises the following steps:
the 16 pin of the ARM processor chip N1 outputs low level;
the green light of the indicator lamp VD2 lights up.
8. The method for implementing the control circuit according to claim 6, wherein when the solenoid valve is abnormal by self-detection, the method comprises the following steps:
a pin 17 of the ARM processor chip N1 outputs a low level;
the red light of the indicator lamp VD2 is lightened;
pin 46 of the ARM processor chip N1 outputs high level;
the buzzer SP1 sounds a high decibel sound alarm.
9. The method of claim 6, wherein the solenoid valve is energized, comprising the steps of:
the electromagnetic valve is self-checked normally;
the 20 pin of the ARM processor chip N1 outputs high level;
the electromagnetic valve driving chip Q1 is conducted with the electromagnetic valve driving chip Q2;
short circuit R4/1K resistance;
the 40 pins of the ARM processor chip output high level;
the electromagnetic valve driving chip VT1 is conducted;
the relay K1 is used for attracting;
the electromagnetic valve is electrified to act.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911025625.2A CN110687847A (en) | 2019-10-25 | 2019-10-25 | Control circuit and implementation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911025625.2A CN110687847A (en) | 2019-10-25 | 2019-10-25 | Control circuit and implementation method |
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| CN110687847A true CN110687847A (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911025625.2A Pending CN110687847A (en) | 2019-10-25 | 2019-10-25 | Control circuit and implementation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112650089A (en) * | 2020-09-03 | 2021-04-13 | 上海明厦物联网科技有限公司 | Design circuit integrating two-bus short circuit detection and isolation and detection method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1360822A (en) * | 2000-12-28 | 2002-07-31 | 广东科龙电器股份有限公司 | Intelligent watering network system |
| JP2007177675A (en) * | 2005-12-27 | 2007-07-12 | Nippon Piston Ring Co Ltd | Needle valve and needle seal for needle valve |
| CN204403519U (en) * | 2015-01-13 | 2015-06-17 | 烟台智慧云谷云计算有限公司 | A kind of electromagnetic valve controlling system |
| NL2018830A (en) * | 2016-06-27 | 2018-01-09 | Chengdu Tian Hang Zhi Hong Man Consulting Co Ltd | Smart and remote-controlled window |
| CN107657733A (en) * | 2017-11-06 | 2018-02-02 | 深圳方电科技有限公司 | A kind of Internet of Things based on NB IOT communications protocol sells paper handkerchief equipment and application method |
| CN107654715A (en) * | 2017-10-12 | 2018-02-02 | 深圳市东震实业有限公司 | Solenoid valve control circuit and electromagnetic valve switch condition detection method |
| CN207764600U (en) * | 2017-12-25 | 2018-08-24 | 天津七一二通信广播股份有限公司 | A kind of 450MHz channel device quick self-checking circuits based on digit chip |
-
2019
- 2019-10-25 CN CN201911025625.2A patent/CN110687847A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1360822A (en) * | 2000-12-28 | 2002-07-31 | 广东科龙电器股份有限公司 | Intelligent watering network system |
| JP2007177675A (en) * | 2005-12-27 | 2007-07-12 | Nippon Piston Ring Co Ltd | Needle valve and needle seal for needle valve |
| CN204403519U (en) * | 2015-01-13 | 2015-06-17 | 烟台智慧云谷云计算有限公司 | A kind of electromagnetic valve controlling system |
| NL2018830A (en) * | 2016-06-27 | 2018-01-09 | Chengdu Tian Hang Zhi Hong Man Consulting Co Ltd | Smart and remote-controlled window |
| CN107654715A (en) * | 2017-10-12 | 2018-02-02 | 深圳市东震实业有限公司 | Solenoid valve control circuit and electromagnetic valve switch condition detection method |
| CN107657733A (en) * | 2017-11-06 | 2018-02-02 | 深圳方电科技有限公司 | A kind of Internet of Things based on NB IOT communications protocol sells paper handkerchief equipment and application method |
| CN207764600U (en) * | 2017-12-25 | 2018-08-24 | 天津七一二通信广播股份有限公司 | A kind of 450MHz channel device quick self-checking circuits based on digit chip |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112650089A (en) * | 2020-09-03 | 2021-04-13 | 上海明厦物联网科技有限公司 | Design circuit integrating two-bus short circuit detection and isolation and detection method |
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Application publication date: 20200114 |
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