CN106402090B - The pressure sensitive device and its control method of hydraulic electric control system - Google Patents
The pressure sensitive device and its control method of hydraulic electric control system Download PDFInfo
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- CN106402090B CN106402090B CN201610930296.6A CN201610930296A CN106402090B CN 106402090 B CN106402090 B CN 106402090B CN 201610930296 A CN201610930296 A CN 201610930296A CN 106402090 B CN106402090 B CN 106402090B
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- pressure sensor
- pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Devices In Control Systems (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Present invention is disclosed a kind of pressure sensitive device of hydraulic electric control system, hydraulic electric control system is provided with pressure sensitive unit on fluid pressure line, the pressure sensitive unit output pressure signal is to pressure closed loop control loop, the pressure sensitive unit includes primary pressure sensor and standby pressure sensor, the switching that the primary pressure sensor and standby pressure sensor are exported all the way by two-way input switchs output pressure signal to pressure closed loop control loop, the primary pressure sensor and standby pressure sensor output signal to PLC, the PLC output switchings signal to switch switch.The present invention is pressure sensor automatic switchover system, using double pressure detecting points control model standby each other, and utilizes automatic switchover system, is always ensured that and uses fault-free online, and is always ensured that the high accuracy of Stress control, response are fast and stability is good.
Description
Technical field
The present invention relates to electrichydraulic control field, more particularly in electrohydraulic control system pressure sensor automatic switchover system
System.
Background technology
At present, the control system of domestic and international Hot Strip Rolling milling equipment is essentially all electrohydraulic control system, all
Accurate control section (such as kink, HGC roll gap, template roller) is all position and double servo closed controls of pressure feedback, with
Modern Rolling Mill to rolling kind and the continuous improvement of final product quality requirement, will to the precision and response speed of key equipment control
Ask and also improve constantly.Wherein, the precision of pressure detecting is most important to the stability and precision of whole control system.
But in actual production process, the electrical equipment catastrophic discontinuityfailure of pressure sensor often occurs, or violent
The fluctuation of pressure detecting signal occurs when vibration, hydraulic system fluctuation, electromagnetic interference, build-up of pressure value of feedback precision
Decline, or even mistake, cause control accuracy to reduce, or even triggering Wrong control action, cause piling of steel stopping accident during rolling,
And equipment damage accident, strong influence is caused to the steady production of producing line.
The content of the invention
The present invention is solved in production process because of the catastrophic discontinuityfailure of pressure sensor, or mistake caused by accuracy of detection error
Control action by mistake, caused piling of steel is shut down and equipment damage accident, is always ensured that high-precision, the high response of Stress control and height are steady
It is qualitative.
To achieve these goals, the technical solution adopted by the present invention is：The pressure sensitive device of hydraulic electric control system, liquid
Voltage control system is provided with pressure sensitive unit, the pressure sensitive unit output pressure signal to hydraulic electric control on fluid pressure line
The pressure closed loop control loop of system, the pressure sensitive unit includes primary pressure sensor and standby pressure sensor, described
The switching that primary pressure sensor and standby pressure sensor are exported all the way by two-way input switchs output pressure signal to pressure
Close loop control circuit, the primary pressure sensor and standby pressure sensor output signal to PLC, the PLC output switchings
Signal to switch switch.
The PLC is connected with warning device.
The PLC is provided with wireless communication unit, and the wireless communication unit leads to far-end server and/or mobile device
Letter.
The pressure sensitive unit is provided with multiple, is separately mounted to hydraulic valve platform, cylinder, on pipeline.
The primary pressure sensor and standby pressure sensor by threeway or adapter be arranged on hydraulic valve platform, cylinder,
On pipeline.
The control method of pressure sensitive device based on described hydraulic electric control system：
1) PLC gathers the signal of primary pressure sensor and standby pressure sensor；
2) judge signal collected whether normal；
3) if primary pressure sensor signal is normal, next step is performed, if primary pressure sensor abnormal signal, performs step
It is rapid 7)；If standby pressure sensor signal is normal, next step is performed, if standby pressure sensor signal is abnormal, failure report
It is alert；
4) primary pressure sensor and the signal traversing of probe cycle pressure value of feedback undulate quantity of standby pressure sensor are compared
It is whether normal；
5) if primary pressure sensor undulate quantity is normal, next step is performed, if primary pressure sensor abnormal signal, is carried out
Test point precision is alarmed；If standby pressure sensor undulate quantity is normal, next step is performed, if standby pressure sensor undulate quantity
It is abnormal, then fault alarm；
6) control switching switch, primary pressure sensor signal is delivered to pressure closed loop control loop, returned 1)；
7) control switching switch, standby pressure sensor signal is delivered to pressure closed loop control loop, returned 1).
The step 2), 3) in primary pressure sensor and standby pressure sensor collection signal parameter in 4mA≤feedback
In the range of electric current≤20mA or 0V≤feedback voltage≤10V, then signal is normal, on the contrary then abnormal.
The step 4), 5) in primary pressure sensor and standby pressure sensor collection signal period pressure feedback value ripple
Momentum≤5Mpa, then signal is normal, on the contrary then abnormal.
The present invention is pressure sensor automatic switchover system, using double pressure detecting points control model standby each other, and
Using automatic switchover system, it is always ensured that and uses fault-free online, and is always ensured that the high accuracy of Stress control, response are fast and steady
It is qualitative good.
By taking the hot finisher kink of hot rolling 2250 as an example, after this system, loop tension control accuracy can be made to keep good
It is good, within positive and negative 3mpa, reduce the piling of steel accident caused by kink pressure sensor failure or fluctuation problem.And this is
The processing time of pressure sensor failure can be also greatly shortened in the use of system, and every fault time, (processing piling of steel, changed pressure
Sensor etc.) it is average about 60 minutes, after this system, pressure sensor can realize that failure automatically switches and alarmed, Awaiting Overhaul
Time changes failure part again, can be that producing line reduces considerable fault time every year.The other electrichydraulic control equipment of similar producing line are all
Such potential faults be present, this system can be promoted in accordance with the law, and to steady production, failure, which is greatly decreased, can obtain good effect.
Brief description of the drawings
The content of every width accompanying drawing expression in description of the invention is briefly described below：
Fig. 1 is the pressure sensitive device block diagram of hydraulic electric control system；
Fig. 2 is the pressure sensitive device control flow chart of hydraulic electric control system.
Embodiment
Hydraulic electric control system is provided with pressure sensitive unit on fluid pressure line, and pressure sensitive unit is typically mounted at hydraulic valve
On the relevant devices such as platform, cylinder, pipeline, as shown in figure 1, original single pressure sensor test point is transformed double pressure sensings by the present invention
Device test point, two sensor the using and the reserved, primary pressure sensor and standby pressure sensor are pacified by threeway or adapter
On hydraulic valve platform, cylinder, pipeline.
The switching that primary pressure sensor and standby pressure sensor are exported all the way by two-way input switchs output pressure and believed
Number PLC, PLC output switchings are outputed signal to pressure closed loop control loop, primary pressure sensor and standby pressure sensor
Signal is connected with warning device, can alarmed in abnormal signal to switch, PLC is switched, and PLC is provided with radio communication list
Member, wireless communication unit and far-end server and/or mobile device communication, quotation signal can also be sent to distal end, it is convenient
Staff safeguards in time.
Based on the pressure sensitive device of above-mentioned hydraulic electric control system, double pressure are designed in PLC control system and program
The automatic switchover system of sensor：Online real-time judge is advocated peace for the state of two pressure sensors, and judgment mode is to pass through pressure
Feedback current, the technical parameter such as voltage change situation, the rate of change of feedback pressure of force snesor are on-line automatic to judge its yuan
Whether part breaks down, and whether the speed of response and feedback accuracy are in normal range (NR), if it is determined that master reference state has exception, and
Standby pressure sensor state is normal, then quickly switches to the use of standby pressure sensor, and send alarm to host computer
Information.
Specific method is as follows：
1) PLC gathers the signal of primary pressure sensor and standby pressure sensor；
2) judge signal collected whether normal；Primary pressure sensor and the signal parameter of standby pressure sensor collection exist
In the range of 4mA≤feedback current≤20mA or 0V≤feedback voltage≤10V, then signal is normal, on the contrary then abnormal；
3) if primary pressure sensor signal is normal, next step is performed, if primary pressure sensor abnormal signal, performs step
It is rapid 7)；If standby pressure sensor signal is normal, next step is performed, if standby pressure sensor signal is abnormal, failure report
It is alert；
4) primary pressure sensor and the signal traversing of probe cycle pressure value of feedback undulate quantity of standby pressure sensor are compared
It is whether normal；Primary pressure sensor and signal period pressure feedback value undulate quantity≤5Mpa of standby pressure sensor collection, then
Signal is normal, on the contrary then abnormal；
5) if primary pressure sensor undulate quantity is normal, next step is performed, if primary pressure sensor abnormal signal, is carried out
Test point precision is alarmed；If standby pressure sensor undulate quantity is normal, next step is performed, if standby pressure sensor undulate quantity
It is abnormal, then fault alarm；
6) control switching switch, primary pressure sensor signal is delivered to pressure closed loop control loop, returned 1)；
7) control switching switch, standby pressure sensor signal is delivered to pressure closed loop control loop, returned 1).
The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that present invention specific implementation is not by aforesaid way
Limitation, as long as the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is employed, or without changing
Enter and the design of the present invention and technical scheme are directly applied into other occasions, within protection scope of the present invention.
Claims (10)
1. the pressure sensitive device of hydraulic electric control system, hydraulic electric control system is provided with pressure sensitive unit, institute on fluid pressure line
Pressure sensitive unit output pressure signal is stated to the pressure closed loop control loop of hydraulic electric control system, it is characterised in that：The pressure
Power sensing unit includes primary pressure sensor and standby pressure sensor, and the primary pressure sensor and standby pressure sensor lead to
Cross the switching that exports all the way of two-way input and switch output pressure signal to pressure closed loop control loop, the primary pressure sensor and
Standby pressure sensor outputs signal to PLC, and the PLC output switchings signal is to switching switch；
The control method of pressure sensitive device based on described hydraulic electric control system, its step are as follows：
1）PLC gathers the signal of primary pressure sensor and standby pressure sensor；
2）Judge signal collected whether normal；
3）If primary pressure sensor signal is normal, next step is performed, if primary pressure sensor abnormal signal, performs step
7）；If standby pressure sensor signal is normal, next step is performed, if standby pressure sensor signal is abnormal, fault alarm；
4）Compare primary pressure sensor and standby pressure sensor signal traversing of probe cycle pressure value of feedback undulate quantity whether
Normally；
5）If primary pressure sensor undulate quantity is normal, next step is performed, if primary pressure sensor abnormal signal, is detected
Point precision alarm；If standby pressure sensor undulate quantity is normal, next step is performed, if standby pressure sensor undulate quantity is different
Often, then fault alarm;
6）Control switching switch, is delivered to pressure closed loop control loop by primary pressure sensor signal, returns to 1）；
7）Control switching switch, is delivered to pressure closed loop control loop by standby pressure sensor signal, returns to 1）;
The step 4）、5）Middle primary pressure sensor and the signal period pressure feedback value undulate quantity of standby pressure sensor collection
≤ 5Mpa, then signal is normal, on the contrary then abnormal.
2. the pressure sensitive device of hydraulic electric control system according to claim 1, it is characterised in that：The PLC is connected with
Warning device.
3. the pressure sensitive device of hydraulic electric control system according to claim 1 or 2, it is characterised in that：The PLC is provided with
Wireless communication unit, the wireless communication unit and far-end server and/or mobile device communication.
4. the pressure sensitive device of hydraulic electric control system according to claim 3, it is characterised in that：Installed on hydraulic valve platform
There is the pressure sensitive unit.
5. the pressure sensitive device of hydraulic electric control system according to claim 3, it is characterised in that：It is provided with hydraulic cylinder
The pressure sensitive unit.
6. the pressure sensitive device of hydraulic electric control system according to claim 5, it is characterised in that：Installed on fluid pressure line
There is the pressure sensitive unit.
7. the pressure sensitive device of hydraulic electric control system according to claim 1 or 2, it is characterised in that：On hydraulic valve platform
The primary pressure sensor and standby pressure sensor are provided with by adapter.
8. the pressure sensitive device of hydraulic electric control system according to claim 7, it is characterised in that：By turning on hydraulic cylinder
Joint is provided with the primary pressure sensor and standby pressure sensor.
9. the pressure sensitive device of hydraulic electric control system according to claim 8, it is characterised in that：Pass through on fluid pressure line
Adapter is provided with the primary pressure sensor and standby pressure sensor.
10. the pressure sensitive device of hydraulic electric control system according to claim 1, it is characterised in that：The step 2）、3）
Middle primary pressure sensor and the signal parameter of standby pressure sensor collection are in 4mA≤feedback current≤20mA or 0V≤feedback electricity
In the range of pressure≤10V, then signal is normal, on the contrary then abnormal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610930296.6A CN106402090B (en) | 2016-10-31 | 2016-10-31 | The pressure sensitive device and its control method of hydraulic electric control system |
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| CN201610930296.6A CN106402090B (en) | 2016-10-31 | 2016-10-31 | The pressure sensitive device and its control method of hydraulic electric control system |
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| CN108655193A (en) * | 2017-03-31 | 2018-10-16 | 上海梅山钢铁股份有限公司 | Sensor hot standby control device online |
| CN111764984B (en) * | 2020-06-29 | 2021-06-22 | 潍柴重机股份有限公司 | Diesel engine oil pressure sensor device and control method |
| CN112051464A (en) * | 2020-08-25 | 2020-12-08 | 中国航空工业集团公司沈阳飞机设计研究所 | Fault detection method and system for dual-channel airborne pressure sensor |
| CN114216211B (en) * | 2021-12-16 | 2022-09-23 | 珠海格力电器股份有限公司 | Filter screen filth blockage detection assembly of fresh air conditioner, fresh air conditioner and control method of fresh air conditioner |
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| CN201586664U (en) * | 2009-12-31 | 2010-09-22 | 秦皇岛首秦金属材料有限公司 | Roller-bending control on-line switching device of rolling mill |
| CN203621109U (en) * | 2013-11-12 | 2014-06-04 | 北京首钢自动化信息技术有限公司 | Cold rolling hydraulic roll gap control pressure detection redundancy switch system |
| CN105363802A (en) * | 2015-12-08 | 2016-03-02 | 北京首钢冷轧薄板有限公司 | Piston side pressure online redundancy detecting method of HGC hydraulic cylinder in continuous rolling machine |
| CN205193611U (en) * | 2015-12-15 | 2016-04-27 | 九江环球科技股份有限公司 | Redundant synchronous electrohydraulic control ware of turbine TRT unit intelligence high accuracy |
| CN206257111U (en) * | 2016-10-31 | 2017-06-16 | 马鞍山钢铁股份有限公司 | The pressure sensitive device of hydraulic electric control system |
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Address after: 243003 Department of intellectual property right of Hunan West Road No. 8 technology center, Ma'anshan City, Anhui Province Applicant after: Ma'anshan Iron and Steel Co., Ltd. Address before: 243003 Hunan Anhui West Road, No. 8 technology center, Intellectual Property Department Applicant before: Ma'anshan Iron and Steel Co., Ltd. |
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Address after: 243003 8 Jiuhua Road, Yushan, Ma'anshan, Anhui Patentee after: Ma'anshan Iron and Steel Co., Ltd. Address before: 243003 intellectual property department, technology center, No. 8 Hunan West Road, Yushan, Ma'anshan, Anhui Patentee before: Ma'anshan Iron and Steel Co., Ltd. |
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