CN101236405A - Control system - Google Patents
Control system Download PDFInfo
- Publication number
- CN101236405A CN101236405A CNA2007100047366A CN200710004736A CN101236405A CN 101236405 A CN101236405 A CN 101236405A CN A2007100047366 A CNA2007100047366 A CN A2007100047366A CN 200710004736 A CN200710004736 A CN 200710004736A CN 101236405 A CN101236405 A CN 101236405A
- Authority
- CN
- China
- Prior art keywords
- controller
- change
- over switch
- signal
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000009471 action Effects 0.000 claims description 7
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 239000000725 suspension Substances 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 29
- 238000010168 coupling process Methods 0.000 description 29
- 238000005859 coupling reaction Methods 0.000 description 29
- 238000012423 maintenance Methods 0.000 description 5
- 230000008439 repair process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
Images
Abstract
A control system utilizes more than two groups of controllers in parallel connection and more than two groups of sensors in parallel connection as system feedback control, and utilizes a signal selector to select signals from the sensors. Therefore signal interference, signal error or signal interrupt and other environmental factors which affect system operation can be avoided, so that the system reliability can be improved. In addition, system operation suspension caused by failure of a single controller or sensor can be avoided, so that the system stability can be improved.
Description
Technical field
The present invention relates to a kind of control system, particularly relate to a kind of closed loop control system.
Background technology
Generally in Industry Control Application, control loop (control loop) system commonly used can be divided into out circuit controls (open-loop control) and closed loop control (closed-loop control).The closed loop control system is a kind of back coupling (feedback) control, very generally reaches maturation on control system is used.And closed loop control mainly is the back coupling value according to sensor (sensor) sensing gained, after comparing with the setting value of original input, changes the output of controller again by the computing of controller, reacts by a running device at last.
Fig. 1 shows existing closed loop control system calcspar.Please refer to Fig. 1, this system comprises controller 110, actuator 120, running device 130, sensor 140, input end 150, and wherein running device 130 also comprises an output terminal 160.
Therefore, classic method is only utilized the closed loop control (one group of controlled variable is done to feedback and controlled) and a controller in single loop, and utilizes the back coupling mode to keep system stability.If during the sensor generation unusual condition of sensing back coupling value, as signal interference, signal errors or signal interruption etc., controller promptly can receive the numerical value of these non-real phenomenas at once, and with these numerical value as the control variable foundation, change system state to reach the demand of sensor.Thus, can't effectively realize the demand of systems stabilisation.In addition, when system maintenance or system compensation, must stop the running of total system, up to maintenance or proofread and correct finish till.Therefore decommission during this period of time in system, may cause the loss of user's profit.In addition, if sensor or controller damage suddenly in running, then system will have no early warning ground and interrupts running, and then must carry out repair action to system by horse back this moment, for the user and Yan Yihui causes the loss on the interests.
Summary of the invention
The purpose of this invention is to provide a kind of control system, this system a plurality of sensors in parallel, and utilize signal selector to select signal from these sensors, to avoid influencing system dependability because of environmental factor.
A further object of the present invention provides a kind of control system, and this system a plurality of controllers in parallel and a plurality of sensor in parallel are to avoid when single controller or single-sensor breaks down or signal disturbs and influence stiffness of system.
The present invention proposes a kind of control system, and this system comprises first controller, actuator, running device and a plurality of sensor, and running device also comprises an output terminal.Wherein actuator is connected with first controller, and running device then is connected to actuator, and this running device has an output terminal.In addition, a plurality of sensors are arranged in parallel the output terminal in running device.Wherein first controller is to control actuator according to the signal of one of them sensor, makes running device begin action.
According to the described control system of one embodiment of the invention, this system also comprises a signal selector, and this signal selector is arranged between the sensor and first controller, in order to select the signal of one of them sensor.Also comprise first change-over switch and second change-over switch in addition.Wherein first change-over switch is to be arranged in parallel with signal selector, and first change-over switch makes first controller be coupled to one of them sensor.In addition, second change-over switch then is to be arranged between first controller and the signal selector, and second change-over switch makes first controller be coupled to signal selector or is coupled to first change-over switch.
According to the described control system of one embodiment of the invention, this system also comprises second controller, first diode and second diode.Wherein second controller and first controller are arranged in parallel, and first diode is arranged between first controller and the actuator, and second diode then is arranged between second controller and the actuator.
The present invention proposes a kind of control system, and this system comprises a plurality of controllers, actuator, a plurality of diode, running device and a plurality of sensor.Wherein a plurality of controllers are arranged in parallel together, and actuator then is connected to these controllers.In addition, a plurality of diodes then are arranged at respectively between each controller and the actuator.Running device then is connected to actuator, and this running device has an output terminal.In addition, a plurality of sensors are arranged in parallel output terminal at running device, and these sensors are coupled to controller, and use one of them controller to control actuator, so that running device begins action according to the signal of one of them sensor.
According to the described control system of one embodiment of the invention, this system also comprises a signal selector, and this signal selector is arranged between sensor and the controller, in order to select the signal of one of them sensor.Also comprise first change-over switch and second change-over switch in addition.Wherein first change-over switch and signal selector are arranged in parallel, and first change-over switch makes controller be coupled to one of them sensor.In addition, second change-over switch then is arranged between signal selector and first change-over switch and the controller, and second change-over switch makes controller be coupled to the signal selector or first change-over switch.
Control system of the present invention is because of being arranged in parallel a plurality of sensors, and the signalization selector switch is selected from the signal of these sensors and carried out the logic determines of signal when unusual.Therefore can avoid because of the environmental factor interference influences System Operation, and elevator system fiduciary level and increase system stability.
And control system of the present invention is provided with a plurality of sensors and can avoids needing the halt system running because of single-sensor breaks down.And when maintenance or system compensation, system does not need to decommission, and can keep System Operation, saves the time of shutting down.
In addition, signal selector carries out logic determines to the signal from these sensors and selects appropriate signals and export controller to, can keep the degree of stability and the fiduciary level of system.
In addition, control system of the present invention also can be arranged in parallel a plurality of controllers or be arranged in parallel a plurality of controllers simultaneously and a plurality of sensor, thus, can avoid reducing the system supply risk because of the halt system running of breaking down of single-sensor or single controller.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 shows existing closed loop control system calcspar.
Fig. 2 shows the control system calcspar according to first embodiment of the invention.
Fig. 3 shows the control system calcspar according to second embodiment of the invention.
The reference numeral explanation
110,204: controller
120,211: actuator
130,213: running device
150,201: input end
160,215: output terminal
140,217,219,221: sensor
203: the first controllers
205: the first diodes
207: the second controllers
209: the second diodes
223: signal selector
225: the first change-over switches
227: the second change-over switches
Embodiment
In case, all can have influence on the stability and the fiduciary level of system owing to single-sensor and/or single controller fault or other abnormal signal interference etc.Therefore, the present invention utilizes a plurality of sensors and/or the next usefulness as back coupling control of a plurality of controller.In order to make content of the present invention more clear, below the example that can implement according to this really as the present invention especially exemplified by embodiment.
Fig. 2 shows the control system calcspar of first embodiment of the invention.Please refer to Fig. 2, this control system comprises input end 201, controller 204, actuator 211, running device 213, sensor 217, sensor 219, sensor 221, signal selector 223, first change-over switch 225 and second change-over switch 227, and running device 213 has output terminal 215.
211 of actuators are to drive running device 213 according to the control variable that controller 204 is provided.And running device 213 produces reaction according to the control signal that actuator 211 transmits, with system held under the state of a setting.
A plurality of sensors (217,219 and 221) are arranged in parallel the output terminal 215 in running device 213, are used for feedbacking the sensing of value to the output terminal 215 of running device 213.Number of sensors for example is 3 in the present embodiment.Certainly, the number of sensor can be decided in its sole discretion according to user's demand, and the sensor more than two or four for example is set.Limiting sensor number range not in the present invention.Then, controller 204 just can be worth according to the back coupling of one of them sensor (217,219 and 221) controls actuator 211, so that running device 213 produces action.
Owing to use a plurality of sensors (217,219 and 221), so present embodiment uses 223 pairs of signals from sensor (217,219 and 221) of a signal selector (back coupling value) to carry out logic determines, and selects appropriate signals and export controller to.This signal selector 223 is arranged between sensor (217,219 and 221) and the controller 204.Utilize simple algorithm to select to use the signal of which sensor (217,219 and 221) (back coupling value).For instance, the statistics such as mean value of the median in the optional majority signal (back coupling value) or these signals (back coupling value).Thus, disturb or signal errorss, or even during unusual condition such as signal interruption, signal selector 223 can be selected appropriate signals (back coupling value) from the signal of sensor 219 and sensor 221, and is sent to controller 204 if signals take place for sensor 217.This signal selector 223 for example is that (programmablelogic controller PLC), does not so limit its scope at this to a program-controlled device.
What deserves to be mentioned is that present embodiment has also used two groups of switches, i.e. first change-over switch 225 and second change-over switch 227.First change-over switch 225 is arranged in parallel with signal selector 223, and first change-over switch 225 makes controller 204 be coupled to one of them sensor (217,219 and 221).In other words, in the present embodiment, first change-over switch 225 can select to use which sensor (217,219 and 221) voluntarily by the user.
In addition, 227 of second change-over switches are arranged between signal selector 223 and first change-over switch 225 and the controller 204.And second change-over switch 227 makes controller 204 be coupled to the signal selector 223 or first change-over switch 225.In other words, in the present embodiment, when second change-over switch 227 makes that controller 204 is coupled to signal selector 223, then carry out automatic selecting signal (back coupling value) control.Otherwise,, then manually select signal (back coupling value) control, so that the signal (back coupling value) of manually selecting one of them sensor (217,219 and 221) to sense when second change-over switch 227 makes controller 204 be coupled to first change-over switch 225.Therefore, keeping in repair or during correction work, utilizing second change-over switch 227 to make controller 204 be coupled to first change-over switch 225, manually selecting signal (back coupling value) control.Then, utilize first change-over switch 225 to select one of them sensor (217,219 and 221) again, then untapped sensor just can keep in repair or correction work.
Fig. 3 shows the control system calcspar of second embodiment of the invention.In Fig. 3, the parts that member title and function are all identical with first embodiment give same label, and omit its explanation.
Please refer to Fig. 3, second embodiment and the first embodiment difference are that control system also comprises a plurality of controllers (first controller 203 and second controller 207) and a plurality of diode (first diode 205 and second diode 209).
What deserves to be mentioned is, when breaking down, still have second controller 207 to use, so system can not cause user's loss because of stop temporarily as if first controller 203.In addition, in the present embodiment, except first controller 203 and second controller 207, still can increase the more control device and, and also these controllers are arranged in parallel corresponding to the diode of each controller.In addition, after increasing amount controller, controller is being keeped in repair or timing, just need not stop the running of total system, and also can obtain preferable control variable.
Then control system of the present invention is described with example.
For instance, with regard to cooling system, mainly be to move via water filling to lower the temperature.Suppose that this system temperature must remain on certain value, therefore import setting value to the first controller 203 and second controller 207 (for example PID controller), first controller 203 and second controller, 207 notice frequency converters (actuator 211) are with the speed of control pumping (running device 213) then, remain on this setting value to keep system temperature, for example this setting value is 25 ℃.
And sensor (217,219 and 221) promptly is to be used for the height of water sink (output terminal 215) temperature of sensing pumping (running device 213), and obtains a back coupling value respectively, and is sent to signal selector 223.223 of signal selectors are selected one of them of the measured back coupling value of these three sensors (217,219 and 221), pass first controller 203 and second controller 207 back.
207 of first controller 203 and second controllers are adjusted error according to back coupling value and setting value, and then the speed of notifying frequency converter (actuator 211) must accelerate or slow down pumping (running device 213), can realize cooling effect to make cooling system really.And the back coupling behind sensing value is extremely important, if when unusual generations arranged, will make system control the wrong computing of output valve because of abnormal signal, and causes the temperature control controlled.For instance, if the measured temperature value of sensor (217,219 and 221) is respectively 30.5 ℃, 25.5 ℃, 25.3 ℃, then sensor 217 measured temperature values are obviously unusual for 30.5 ℃.Directly during as the back coupling value, can cause system temperature out of control with 30.5 ℃ of measured temperature values of sensor 217.Therefore when using the framework of a plurality of sensors to carry out sensing, unusual if sensor 217 takes place, also can use the measured back coupling value of sensor 219 and sensor 221.And, utilize signal selector 223 from 30.5 ℃, 25.5 ℃, 25.3 ℃ of measured temperature values of sensor (217,219 and 221), to select suitable back coupling value, also can avoid because of the environmental factor interference influences System Operation, and elevator system fiduciary level and increase system stability.
And, employing is arranged in parallel first controller 203 and second controller 207, when 203 generations of first controller are unusual, also can use second controller 207 to control, equally also can avoid because of the environmental factor interference influences System Operation, and elevator system fiduciary level and increase system stability.
In sum, have following advantage at least in control system of the present invention:
1. control system of the present invention is in parallel uses a plurality of sensors, avoids breaking down and system being decommissioned when single-sensor, to increase system stability.And when maintenance or system compensation, system does not need to decommission, and can keep System Operation, saves the time of shutting down.
2. control system of the present invention a plurality of controllers or a plurality of controllers and a plurality of sensor of using in parallel simultaneously of using in parallel, when maintenance or system compensation, system does not need to decommission, and can further reduce the system supply risk.
3. control system signalization selector switch of the present invention is selected from the signal of these sensors and is carried out the logic determines of signal when unusual.Therefore can avoid because of environmental factors such as signal interference, signal errors or signal interruption influence System Operation, and elevator system fiduciary level and increase system stability.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; those skilled in the art can do some changes and retouching under the premise without departing from the spirit and scope of the present invention, so protection scope of the present invention is as the criterion with claim of the present invention.
Claims (9)
1. control system comprises:
One first controller;
One actuator connects this first controller;
One running device connects this actuator, and this running device has an output terminal; And
A plurality of sensors are arranged in parallel the output terminal in this running device, and described sensor couples this controller, and wherein this controller is according to this actuator of signal controlling of described sensor, so that this running device action.
2. control system as claimed in claim 1 also comprises:
One signal selector is arranged between described sensor and this first controller, to select the signal of described sensor.
3. control system as claimed in claim 2 also comprises:
One first change-over switch, this first change-over switch and this signal selector are arranged in parallel, and this first change-over switch makes this first controller couple one of them of described sensor; And
One second change-over switch is arranged between this first controller and this signal selector, and this second change-over switch makes this first controller couple this signal selector or this first change-over switch.
4. control system as claimed in claim 1 also comprises:
One second controller, this second controller and this first controller are arranged in parallel;
One first diode is arranged between this first controller and this actuator; And
One second diode is arranged between this second controller and this actuator.
5. control system as claimed in claim 4 also comprises:
One signal selector is arranged between described sensor and this first controller and this second controller, to select the signal of described sensor.
6. control system as claimed in claim 5 also comprises:
One first change-over switch, this first change-over switch and this signal selector are arranged in parallel, and this first change-over switch makes this first controller and this second controller couple one of them of described sensor; And
One second change-over switch is arranged between this signal selector and first change-over switch and this first controller and this second controller, and this second change-over switch makes this first controller and this second controller couple this signal selector or this first change-over switch.
7. control system comprises:
A plurality of controllers are arranged in parallel together;
One actuator connects described controller;
A plurality of diodes are arranged at respectively between described controller and this actuator;
One running device connects this actuator, and this running device has an output terminal; And
A plurality of sensors are arranged in parallel the output terminal in this running device, and described sensor couples described controller, and wherein said controller is according to this actuator of signal controlling of described sensor, so that this running device action.
8. control system as claimed in claim 7 also comprises:
One signal selector is arranged between described sensor and the described controller, to select the signal of described sensor.
9. control system as claimed in claim 8 also comprises:
One first change-over switch, this first change-over switch and this signal selector are arranged in parallel, and this first change-over switch makes described controller couple one of them of described sensor; And
One second change-over switch is arranged between this signal selector and this first change-over switch and the described controller, and this second change-over switch makes described controller couple this signal selector or this first change-over switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100047366A CN101236405A (en) | 2007-01-30 | 2007-01-30 | Control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100047366A CN101236405A (en) | 2007-01-30 | 2007-01-30 | Control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101236405A true CN101236405A (en) | 2008-08-06 |
Family
ID=39920076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100047366A Pending CN101236405A (en) | 2007-01-30 | 2007-01-30 | Control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101236405A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109649427A (en) * | 2019-01-30 | 2019-04-19 | 重庆中车长客轨道车辆有限公司 | Track train and its empty spring device |
| CN112288911A (en) * | 2020-10-21 | 2021-01-29 | 广东美电贝尔科技集团股份有限公司 | Gate inhibition logic control system and control method thereof |
-
2007
- 2007-01-30 CN CNA2007100047366A patent/CN101236405A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109649427A (en) * | 2019-01-30 | 2019-04-19 | 重庆中车长客轨道车辆有限公司 | Track train and its empty spring device |
| CN112288911A (en) * | 2020-10-21 | 2021-01-29 | 广东美电贝尔科技集团股份有限公司 | Gate inhibition logic control system and control method thereof |
| CN112288911B (en) * | 2020-10-21 | 2022-07-08 | 广东美电贝尔科技集团股份有限公司 | Entrance guard logic control system and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8588987B2 (en) | Wind farm and method for controlling a wind farm | |
| US20120193915A1 (en) | Reactive voltage control system and method for wind power field of double-fed wind power-generating unit | |
| KR100671620B1 (en) | Control system for multi-pump operation | |
| US11898449B2 (en) | Turbine control system | |
| CN202421819U (en) | Triple redundancy analog output module for DCS (Distributed Control System) | |
| KR20100078858A (en) | System for controlling coolern of power transformer | |
| CN103294030A (en) | DCS (distributed control system) control method and SMITH controller | |
| CN101236405A (en) | Control system | |
| CN108507245B (en) | Nested closed-loop full-automatic industrial circulating cooling control system and control method | |
| NL8503077A (en) | COOLING PLANT. | |
| CN108547760B (en) | Frequency follow-up control method for lift pump of water treatment | |
| CN102185648A (en) | Test system and method for increasing debugging and detection speed of optical module | |
| CN102904328A (en) | Laser redundant backup power supply | |
| KR101702935B1 (en) | Method for operating dual controller | |
| CN204716670U (en) | The closed-loop automatic control mechanism of hydraulic system | |
| US10547254B2 (en) | Apparatus for controlling multiple inverters and inverter system including the same | |
| CN109856958A (en) | A kind of control method for preventing integral to be saturated | |
| KR20160098036A (en) | Method for Operating Heat Pump Water Heater | |
| CN204902129U (en) | Data center cold source cooperative control system | |
| CN205348263U (en) | Welding machine recirculated cooling water supercharging device of robot of automobile welding mill | |
| KR101298459B1 (en) | Bus structure of fpga based controler | |
| CN208969453U (en) | A kind of manual station structure of fired power generating unit simulation | |
| US4550380A (en) | Microprocessor-based extraction turbine control | |
| CN108138760A (en) | For controlling the system of compressibility | |
| CN106547230A (en) | A kind of transformer cooling control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080806 |