CN105042159A - Electromagnetic valve drive device with fault diagnosis function and self-protection function - Google Patents
Electromagnetic valve drive device with fault diagnosis function and self-protection function Download PDFInfo
- Publication number
- CN105042159A CN105042159A CN201510440305.9A CN201510440305A CN105042159A CN 105042159 A CN105042159 A CN 105042159A CN 201510440305 A CN201510440305 A CN 201510440305A CN 105042159 A CN105042159 A CN 105042159A
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- Prior art keywords
- electromagnetic valve
- signal
- logic module
- self
- fault diagnosis
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Classifications
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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
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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
- F16K37/0025—Electrical or magnetic means
Abstract
The invention discloses an electromagnetic valve drive device with a fault diagnosis function and a self-protection function. The electromagnetic valve drive device comprises a microcontroller ECU, a driver, a high-voltage drive MOSFET switch, a low-voltage drive MOSFET switch, a lower-end MOSFET switch, a current sampling and comparing circuit and a CPLD logic module. The microcontroller ECU is connected with the driver and the CPLD logic module. The driver and the CPLD logic module are connected with the three MOSFET switches. The current sampling and comparing circuit is connected with the lower-end MOSFET switch and the CPLD logic module. The electromagnetic valve drive device with the fault diagnosis function and the self-protection function is simple in structure. Different faults of an electromagnetic valve are quickly detected by means of the CPLD technology. Besides, the electromagnetic drive device is protected when the faults happen. The electromagnetic valve drive device has the excellent performance of being accurate in fault judgment, high in response speed and few in occupied CPU resource.
Description
Technical field
The present invention relates to a kind of electromagnetic valve actuator, particularly relate to a kind of electromagnetic valve actuator with fault diagnosis and self-protecting function, belong to technical field of electric appliances.
Background technique
Solenoid valve failure mainly contains open circuit and short circuit two kinds.Open circuit fault shows as: solenoid valve in the course of the work, because the reasons such as collision, vibration cause solenoid valve wire harness to connect fracture that is bad or coil itself, causes the phenomenon that the resistance of drive circuit generation open circuit or electromagnetic coil strengthens; When open circuit fault occurs, the electric current in solenoid valve be always zero or the rate of climb slow.Short trouble shows as: solenoid valve in the course of the work, because factors such as collision, vibrations, causes contacing by mistake of different wire harness, or because electric current is excessive, temperature crosses high factor, causes the phenomenon of coil burnout; When short trouble occurs, inductance, the impedance of electromagnetic valve coil are minimum, and the electric current rate of climb is very fast, if do not limited, can reach tens amperes, cause the damage of driving system for electromagnetic valve in several microsecond.
At present, although a lot of electromagnetic valve actuator has higher switching speed, lack fault diagnosis and self-protecting function.Although some electromagnetic valve actuator adds fault diagnosis functions in the controls, but the fault detection approach that main employing is traditional, mainly by detecting motor instant rotating speed, calculate the nonuniformity of each cylinder solenoid valve oil spout, then by software failure judgement state.It is large that this mode takies cpu resource amount, and speed of response is slow, and judgment accuracy is poor, is particularly very restricted in high-speed switch electromagnetic valve fault diagnosis.
Summary of the invention
For the demand; the invention provides a kind of electromagnetic valve actuator with fault diagnosis and self-protecting function; this electromagnetic valve actuator structure is simple; by the different faults adopting CPLD technology to detect rapidly solenoid valve; and when fault occurs, electromagnetic valve actuator is protected, have breakdown judge accurately, fast response time, take the few excellent properties of cpu resource.
The present invention is a kind of electromagnetic valve actuator with fault diagnosis and self-protecting function; described electromagnetic valve actuator comprises microcontroller ECU, driver, high drive switch mosfet, low-voltage driving switch mosfet, low-side MOSFET switch, current sample comparison circuit and CPLD logic module; described microcontroller ECU connects driver and CPLD logic module respectively; described driver and CPLD logic module are connected three switch mosfets respectively, and described current sample comparison circuit connects low-side MOSFET switch and CPLD logic module respectively.
In a preferred embodiment of the present invention, the break-make of difference drived control high drive switch mosfet, low-voltage driving switch mosfet, low-side MOSFET switch after the high-voltage switch gear signal exported, upper switching signal, the next switching signal are amplified by driver by described microcontroller ECU.
In a preferred embodiment of the present invention, described current sample comparison circuit is made up of sampling resistor and voltage comparator, its sampling resistor connects the source electrode of low-side MOSFET switch, electromagnetic valve driving current is sampled by sampling resistor, produce sampling voltage, compared by voltage comparator and reference voltage again, and export comparison signal to CPLD logic module.
In a preferred embodiment of the present invention, described CPLD logic module is made up of T1 square-wave generator, T2 square-wave generator, latch and logical device, this CPLD logic module carries out faut detection by detecting the comparison signal upset moment, and after judging solenoid valve failure, the rapid control signal that exports is forced shutdown switch mosfet, exports fault indication signal to microcontroller ECU simultaneously.
In a preferred embodiment of the present invention, the switching signal that described T1 square-wave generator is exported by microcontroller ECU triggers, and by this signal is carried out corresponding logical operation to comparison signal, judges that open circuit fault appears in solenoid valve.
In a preferred embodiment of the present invention, the switching signal that described T2 square-wave generator is exported by microcontroller ECU triggers, and by this signal is carried out corresponding logical operation to comparison signal, judges that short trouble appears in solenoid valve.
In a preferred embodiment of the present invention, described latch can the trouble signal that produce in CPLD logic module latch, and to maintain fault indicating condition, and resets at the end of the working signal sent at microcontroller ECU.
Present invention is disclosed a kind of electromagnetic valve actuator with fault diagnosis and self-protecting function; this electromagnetic valve actuator structure is simple; by the different faults adopting CPLD technology to detect rapidly solenoid valve; and when fault occurs, electromagnetic valve actuator is protected, have breakdown judge accurately, fast response time, take the few excellent properties of cpu resource.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the structured flowchart that the embodiment of the present invention has the electromagnetic valve actuator of fault diagnosis and self-protecting function.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Fig. 1 is the structured flowchart that the embodiment of the present invention has the electromagnetic valve actuator of fault diagnosis and self-protecting function; This electromagnetic valve actuator comprises microcontroller ECU, driver, high drive switch mosfet, low-voltage driving switch mosfet, low-side MOSFET switch, current sample comparison circuit and CPLD logic module, described microcontroller ECU connects driver and CPLD logic module respectively, described driver and CPLD logic module are connected three switch mosfets respectively, and described current sample comparison circuit connects low-side MOSFET switch and CPLD logic module respectively.
The electromagnetic valve actuator of what the present invention mentioned have fault diagnosis and self-protecting function with CPLD logic module for fault diagnosis core; by to the rapid extraction of electromagnetic valve driving current feature and judgement; identify rapidly the open circuit of solenoid valve, short trouble; and can after failure judgement closing fault solenoid valve in 7ns; fault state is notified microcontroller ECU simultaneously; lessly take cpu resource, thus effectively ensure that electromagnetic valve actuator safe operation.The break-make of difference drived control high drive switch mosfet, low-voltage driving switch mosfet, low-side MOSFET switch after output signal is amplified by driver by the microcontroller ECU in this electromagnetic valve actuator.Wherein, high drive switch mosfet connects high-voltage power and solenoid valve respectively, the high-voltage switch gear signal of its break-make by driver output or the control of CPLD logic module output signal; Low-voltage driving switch mosfet connects low tension power supply and solenoid valve respectively, the upper switching signal of its break-make by driver output or the control of CPLD logic module output signal; Low-side MOSFET switch connects current sample comparison circuit and solenoid valve respectively, the next switching signal of its break-make by driver output or the control of CPLD logic module output signal.Current sample comparison circuit in this electromagnetic valve actuator is made up of sampling resistor and voltage comparator, its sampling resistor connects the source electrode of low-side MOSFET switch, electromagnetic valve driving current is sampled by sampling resistor, produce sampling voltage, compared by voltage comparator and reference voltage again, and export comparison signal to CPLD logic module.
The CPLD logic module that the electromagnetic valve actuator with fault diagnosis and self-protecting function of the present invention's proposition adopts is made up of T1 square-wave generator, T2 square-wave generator, latch and logical device.Wherein, the switching signal that T1 square-wave generator is exported by microcontroller ECU triggers, and by this signal is carried out corresponding logical operation to comparison signal, judges that open circuit fault appears in solenoid valve; When solenoid valve generation open circuit fault, electromagnetic valve driving current rises slowly or is always zero, the comparator output value upset moment is more late or cannot occur upset at all, after the switch mosfet T1 time is opened in microcontroller ECU driving, comparator exports and overturns not yet, then CPLD logic module judges that open circuit fault appears in solenoid valve, exports control signal immediately and is forced shutdown switch mosfet, exports fault indication signal to microcontroller ECU simultaneously.The switching signal that T2 square-wave generator is exported by microcontroller ECU triggers, and by this signal is carried out corresponding logical operation to comparison signal, judges that short trouble appears in solenoid valve; When solenoid valve is short-circuited fault, the electromagnetic valve driving current rate of climb is accelerated, just may tens amperes be reached within the extremely short time, after the switch mosfet T2 time is opened in microcontroller ECU driving, if before the T2 moment, driving current just reaches reference voltage, namely comparator exports and overturns, then CPLD logic module judges that short trouble appears in solenoid valve, exports control signal immediately and is forced shutdown switch mosfet, exports fault indication signal to microcontroller ECU simultaneously.Latch can the trouble signal that produce in CPLD logic module latch, and to maintain fault indicating condition, and resets at the end of the working signal sent at microcontroller ECU, does not force unlatching work next time of shielding solenoid valve, improve the flexibility of drive system.
Present invention is disclosed a kind of electromagnetic valve actuator with fault diagnosis and self-protecting function; this electromagnetic valve actuator structure is simple; by the different faults adopting CPLD technology to detect rapidly solenoid valve; and when fault occurs, electromagnetic valve actuator is protected, have breakdown judge accurately, fast response time, take the few excellent properties of cpu resource.
The above; be only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the technical scope disclosed by the present invention; the change can expected without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.
Claims (7)
1. one kind has the electromagnetic valve actuator of fault diagnosis and self-protecting function, it is characterized in that, described electromagnetic valve actuator comprises microcontroller ECU, driver, high drive switch mosfet, low-voltage driving switch mosfet, low-side MOSFET switch, current sample comparison circuit and CPLD logic module, described microcontroller ECU connects driver and CPLD logic module respectively, described driver and CPLD logic module are connected three switch mosfets respectively, described current sample comparison circuit connects low-side MOSFET switch and CPLD logic module respectively.
2. the electromagnetic valve actuator with fault diagnosis and self-protecting function according to claim 1; it is characterized in that, the break-make of difference drived control high drive switch mosfet, low-voltage driving switch mosfet, low-side MOSFET switch after the high-voltage switch gear signal exported, upper switching signal, the next switching signal are amplified by driver by described microcontroller ECU.
3. the electromagnetic valve actuator with fault diagnosis and self-protecting function according to claim 1; it is characterized in that; described current sample comparison circuit is made up of sampling resistor and voltage comparator; its sampling resistor connects the source electrode of low-side MOSFET switch; electromagnetic valve driving current is sampled by sampling resistor; produce sampling voltage, then compared by voltage comparator and reference voltage, and export comparison signal to CPLD logic module.
4. the electromagnetic valve actuator with fault diagnosis and self-protecting function according to claim 1; it is characterized in that; described CPLD logic module is made up of T1 square-wave generator, T2 square-wave generator, latch and logical device; this CPLD logic module carries out faut detection by detecting the comparison signal upset moment; and after judging solenoid valve failure, the rapid control signal that exports is forced shutdown switch mosfet, exports fault indication signal to microcontroller ECU simultaneously.
5. the electromagnetic valve actuator with fault diagnosis and self-protecting function according to claim 4; it is characterized in that; the switching signal that described T1 square-wave generator is exported by microcontroller ECU triggers; by this signal is carried out corresponding logical operation to comparison signal, judge that open circuit fault appears in solenoid valve.
6. the electromagnetic valve actuator with fault diagnosis and self-protecting function according to claim 4; it is characterized in that; the switching signal that described T2 square-wave generator is exported by microcontroller ECU triggers; by this signal is carried out corresponding logical operation to comparison signal, judge that short trouble appears in solenoid valve.
7. the electromagnetic valve actuator with fault diagnosis and self-protecting function according to claim 4; it is characterized in that; the trouble signal produced in CPLD logic module can latch by described latch; to maintain fault indicating condition, and reset at the end of the working signal sent at microcontroller ECU.
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| CN201510440305.9A CN105042159A (en) | 2015-07-24 | 2015-07-24 | Electromagnetic valve drive device with fault diagnosis function and self-protection function |
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| CN201510440305.9A CN105042159A (en) | 2015-07-24 | 2015-07-24 | Electromagnetic valve drive device with fault diagnosis function and self-protection function |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106015703A (en) * | 2016-07-28 | 2016-10-12 | 湖南凯杰科技有限责任公司 | Electromagnetic valve drive system |
| CN106526478A (en) * | 2016-12-30 | 2017-03-22 | 安徽江淮汽车集团股份有限公司 | Fault real-time detection method and device for electro-hydraulic proportional solenoid valve |
| CN108661815A (en) * | 2018-04-16 | 2018-10-16 | 江苏大学 | A kind of electronic controlled fuel metering units electromagnetic valve controlling system and control method |
| CN108730606A (en) * | 2017-04-17 | 2018-11-02 | 江苏核电有限公司 | A kind of radgas sampling valve position of electromagnetic valve malfunction monitoring system and method |
| CN109256751A (en) * | 2018-11-14 | 2019-01-22 | 苏州绿控新能源科技有限公司 | A kind of electric machine controller drive waveforms monitoring method |
| CN109958815A (en) * | 2017-12-22 | 2019-07-02 | 圣邦微电子（北京）股份有限公司 | A kind of electromagnetic driver with electromagnetic plunger motion detection circuit |
| CN110307474A (en) * | 2019-05-27 | 2019-10-08 | 中国石油天然气集团有限公司 | A kind of fluid pipeline dead oil section pressure relief device |
| CN110347143A (en) * | 2019-08-07 | 2019-10-18 | 中国核动力研究设计院 | Nuclear safe level preferred module scene drives output loop diagnostic system and method |
| CN110932392A (en) * | 2019-11-13 | 2020-03-27 | 贵州天义电器有限责任公司 | Intelligent control system and control method for contactor |
| CN112117081A (en) * | 2020-09-29 | 2020-12-22 | 南京乔克空压设备有限公司 | Piston solenoid valve coil driving system |
| CN113110397A (en) * | 2021-05-08 | 2021-07-13 | 重庆红江机械有限责任公司 | High-speed electromagnetic valve driving circuit and fault diagnosis circuit and method |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015703A (en) * | 2016-07-28 | 2016-10-12 | 湖南凯杰科技有限责任公司 | Electromagnetic valve drive system |
| CN106526478A (en) * | 2016-12-30 | 2017-03-22 | 安徽江淮汽车集团股份有限公司 | Fault real-time detection method and device for electro-hydraulic proportional solenoid valve |
| CN106526478B (en) * | 2016-12-30 | 2019-02-19 | 安徽江淮汽车集团股份有限公司 | Electric-hydraulic proportion solenoid valve failure real-time detection method and device |
| CN108730606A (en) * | 2017-04-17 | 2018-11-02 | 江苏核电有限公司 | A kind of radgas sampling valve position of electromagnetic valve malfunction monitoring system and method |
| CN108730606B (en) * | 2017-04-17 | 2023-09-08 | 江苏核电有限公司 | Radioactive gas sampling electromagnetic valve position misoperation monitoring system and method |
| CN109958815B (en) * | 2017-12-22 | 2020-10-27 | 圣邦微电子（北京）股份有限公司 | Electromagnetic driver with electromagnetic plunger motion detection circuit |
| CN109958815A (en) * | 2017-12-22 | 2019-07-02 | 圣邦微电子（北京）股份有限公司 | A kind of electromagnetic driver with electromagnetic plunger motion detection circuit |
| CN108661815A (en) * | 2018-04-16 | 2018-10-16 | 江苏大学 | A kind of electronic controlled fuel metering units electromagnetic valve controlling system and control method |
| CN108661815B (en) * | 2018-04-16 | 2020-03-31 | 江苏大学 | Electromagnetic valve control system and control method for electric control fuel metering unit |
| CN109256751A (en) * | 2018-11-14 | 2019-01-22 | 苏州绿控新能源科技有限公司 | A kind of electric machine controller drive waveforms monitoring method |
| CN110307474A (en) * | 2019-05-27 | 2019-10-08 | 中国石油天然气集团有限公司 | A kind of fluid pipeline dead oil section pressure relief device |
| CN110347143A (en) * | 2019-08-07 | 2019-10-18 | 中国核动力研究设计院 | Nuclear safe level preferred module scene drives output loop diagnostic system and method |
| CN110932392B (en) * | 2019-11-13 | 2023-06-16 | 贵州天义电器有限责任公司 | Intelligent control system and control method for contactor |
| CN110932392A (en) * | 2019-11-13 | 2020-03-27 | 贵州天义电器有限责任公司 | Intelligent control system and control method for contactor |
| CN112117081A (en) * | 2020-09-29 | 2020-12-22 | 南京乔克空压设备有限公司 | Piston solenoid valve coil driving system |
| CN113110397A (en) * | 2021-05-08 | 2021-07-13 | 重庆红江机械有限责任公司 | High-speed electromagnetic valve driving circuit and fault diagnosis circuit and method |
| CN113110397B (en) * | 2021-05-08 | 2022-03-22 | 重庆红江机械有限责任公司 | High-speed electromagnetic valve driving circuit and fault diagnosis circuit and method |
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