CN105890198A - Control method using light intensity and temperature as parameters - Google Patents
Control method using light intensity and temperature as parameters Download PDFInfo
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- CN105890198A CN105890198A CN201410827120.9A CN201410827120A CN105890198A CN 105890198 A CN105890198 A CN 105890198A CN 201410827120 A CN201410827120 A CN 201410827120A CN 105890198 A CN105890198 A CN 105890198A
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- light intensity
- temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The invention provides a control method using light intensity and temperature as parameters, and belongs to the field of application of automatic control technologies. In the method, a light intensity parameter I, a temperature parameter T, and a running and stopping period TC and duty ratio DC of a controlled object are included. The method comprises the following steps: comparing a light intensity signal Itn and a threshold value Ith to determine running and forbidding of the controlled object; adjusting the running and stopping period TC by using an average value Im of the light intensity signal; and adjusting the duty ratio DC and stopping time by using an acquired sequence temperature value Ti and difference delta T between a peak value Tmax and a valley value Tmin. In the method, control of a circulating pump of a solar heat collecting system is used as an example of application (but application limitation does not exist), in the application, only a temperature sensor and a photosensitive sensor are required, the temperature sensor is placed at a position facilitating operation in a circulation loop, the photosensitive sensor can be placed flexibly, and is placed in a place where light intensity is relevant to a sunlight change condition according to a control condition, and compared with a common temperature difference type circulating control method, the control method has the features that mounting of a remote temperature sensor and wiring construction are omitted, construction is easy, and maintenance is simple.
Description
(1) technical field
The present invention relates to a kind of with light intensity and temperature the control method as parameter, belong to automatic control technology
Application.
(2) background technology
Often use mechanical and power equipment to reach predetermined purpose, the most too in productive life
The circulating pump used in sun energy collecting system just belongs to this kind of mechanical and power equipment.The operation of this kind equipment is past
Toward being required for certain control condition, as a example by solar thermal collection system, along with the rise of the sun, heat collector
The solar radiation energy absorbed is converted into heat energy, now need liquid circulation flow dynamic transmit heat energy to energy storage or
In transducing devices.And after sun west falls, the temperature of heat collector is gradually less than energy storage or the temperature of heat transmission equipment
Degree, the most just must stop circulating to reach to be incubated the purpose of energy storage.Solar thermal collection system generally makes at present
The control method of circulating pump be temperature difference control methods, it is according to heat collector and the difference of temperature in energy storage device
Value controls circulating pump start and stop.This method is directly effective, however it is necessary that and sets with energy storage on heat collector respectively
Temperature sensor is respectively set for interior, and is connected with controller by cable.Room all it is mounted in due to heat collector
The place of outer Chaoyang, energy storage device is typically placed in indoor, and controller is all proximate to what energy storage device was installed,
So the cable of temperature sensor is the most long on connection heat collector, but also through walls, cable wiring manufacture ratio
Cumbersome, particularly once break down after putting into operation, search trouble point, maintenance sensor and electricity
Cable is the most highly difficult.
(3) summary of the invention
(purpose) present invention proposes the control method of a kind of mechanical and power equipment circulating pump, this method
Control is realized for parameter with light intensity and temperature, especially for the circulating pump controlled in solar thermal collection system,
Exempt and safeguard the purpose of distance sensor and long cable reaching to simplify installation.
(technical scheme) is in order to achieve the above object, involved in the present invention with light intensity and temperature as parameter
Control method include light intensity parameter I, temperature parameter T, the cycle of operation T of control object circulating pumpC, and
Dutycycle DCI.e. run the ratio of time and cycle.With light intensity parameter regulating cycle TCAnd startup optimization, with temperature
Degree parameter regulation runs dutycycle DCWith out of service.First Intensity threshold I is setth, and cycle of operation is set
Initial value TC0, by dutycycle DC0Initial value be set to 50%.Set or detect intensity collection module position
Light intensity maximum Imax, and with this value, the real-time measurement values of light intensity is done normalized.
Detection light intensity signal I the most in real timetAnd do normalized and obtain normalization light intensity Itn.According to ItnFlat
Average ImRevision cycle of operation TC, and by ItnWith Intensity threshold IthCompare, work as Itn＞ IthShi Qidong follows
Ring pump, otherwise forbids running.After circulating pump brings into operation, the mould of collecting temperature detection at a certain time interval
Temperature T that block recordsi(i=1,2 ..., N), N is the number of times of temperature acquisition during circular flow.Measure
The temperature sequence obtained is relevant to temperature changing process, can be in the hope of maximum of T from this sequencemax, minima Tmin
With peak valley difference DELTA T=Tmax-Tmin.Work as Ti≤TminTime or during i=N, circulating pump is out of service, the time of stopping
With dutycycle DCCorresponding, its a length of TC×(1-DC).The numerical value regulation of i when stopping according to Δ T and circulation
Run dutycycle DC, when Δ T and circulation stop, the numerical value of i is the biggest, and the time the longest i.e. dutycycle of operation is more
Greatly.So far a cycle of operation completes, and returns to detect in real time the step of light intensity signal, starts a new week
Phase, carry out again and again.
(beneficial effect) with light intensity and temperature, the control method as parameter needs in engineer applied as mentioned above
Wanting a temperature sensor and a light sensor, temperature sensor has only to be placed in closed circuit to be easy to
The position of operation, eliminates installation remote temperature sensor and cable wiring manufacture.Light sensor can also spirit
Living and place, as long as be placed on the place of light intensity respective change according to control condition, easy for installation, construction is held
Easily, safeguard simply, and there is good control effect.
(4) accompanying drawing explanation
Below example and accompanying drawing illustrate control method of the present invention, and embodiment can help
Understand method of the present invention, but be not intended that the application to this method limits.
Fig. 1 is the control method control flow chart as parameter with light intensity and temperature that the present invention proposes.
The control method as parameter with light intensity and temperature described by Fig. 1 includes light intensity parameter I, and temperature is joined
Number T, the cycle of operation T of control object circulating pumpCAnd dutycycle DC。
Detailed description of the invention
Describe the control method as parameter with light intensity and temperature that the present invention proposes below in conjunction with the accompanying drawings in detail
And process.
First step S1: equipped with gathering the light-intensity test module of light intensity parameter I and can adopt in control object system
The temperature detecting module of collection temperature parameter T, as a example by solar thermal collection system, light-intensity test module is arranged on
The place of light intensity changed condition at sunshine, controls the operation of circulating pump, sets for this according to the detected value of light intensity
Intensity threshold Ith, as benchmark.
Second step S2: initial launch cycle T is setC0With dutycycle DC0It is 50%.
3rd step S3: temperature detecting module is arranged in solar thermal collection system closed circuit.Light-intensity test module is examined
Measure the maximum I of light intensitymax, or preset this value according to conventional data.
4th step S4: detection light intensity signal I in real timet, with ImaxDo normalized and obtain normalization light intensity Itn=It/Imax。
According to ItnMeansigma methods ImRevision cycle of operation so that cycle of operation TC=TC0×(1-Im+ a), wherein a is root
The numerical value set according to the minimum period.
5th step S5: by ItnWith IthCompare, work as Itn＞ IthTime start cycles pump, work as Itn≤IthTime, stop
Only circulating pump.
6th step S6: after pump operating cycle, the temperature at temperature detecting module will change, and this module is pressed fixing
Sampling interval collecting temperature Ti(i=1,2 ..., N), N is the number of samples during pump operating cycle, its
Numerical value depends on last cycle of operation TCWith dutycycle DC.Measure the temperature sequence and solar radiation shape obtained
Dependency is there is, it is possible to reflect the working condition of heat collector between condition.From TiSequence calculates maximum
Tmax, minima TminWith peak valley difference DELTA T=Tmax-Tmin。
7th step S7: while temperature detection, by TiWith TminCompare, work as Ti≤TminTime or stop during i=N
Only circulating pump work, the time of stopping and cycle of operation TCWith dutycycle DCCorresponding, i.e. TC×(1-DC)。
8th step S8: according to Δ T and out of service time i numerical value, determined the operation time of a new round by calculating
Dutycycle DC.Δ T the biggest and stop circulating pump time i the biggest, dutycycle DCThe highest.So far one complete
Whole control end cycle, returns to S4 and starts a new cycle, go round and begin again.
Claims (5)
1. the control method as parameter with light intensity and temperature, including light intensity parameter I, temperature parameter T, control
The cycle of operation T of objectCWith dutycycle DC；
S4: with real-time light intensity ItnMeansigma methods ImRegulation cycle of operation TC；
S5: with real-time light intensity signal ItnWith threshold value IthRelatively determine the operation of control object and forbid running；
S6: gather the sequence temperature value Ti measuring point, thus try to achieve peak value Tmax, valley TminAnd
Difference DELTA T；
S7: by real time temperature TiWith valley TminRelatively, compare i and N, it may be judged whether meet and run simultaneously
Stop condition；
S8: according to Δ T and out of service time i numerical value, calculate dutycycle D of next cycle of operationC。
The most according to claim 1 with light intensity and temperature the control method as parameter, it is characterised in that examine in real time
Survey light intensity signal It, with the maximum I of light intensitymaxDo normalized and obtain normalization light intensity
Itn=It/Imax.According to ItnMeansigma methods ImRevision cycle of operation TC。
The most according to claim 1 with light intensity and temperature the control method as parameter, it is characterised in that system transport
It is spaced collecting temperature sequence T by fixed sample after rowi(i=1,2 ..., N), N is run duration
Number of samples, numerical value depends on a cycle of operation TCWith dutycycle DC, pass through TiCan deduce
By the working condition of control system.
The most according to claim 1 with light intensity and temperature the control method as parameter, it is characterised in that gather
Temperature sequence TiWhile, compare TiWith TminValue and the value of i Yu N, determine when stop with this
Run, the time of stopping and cycle of operation TCWith dutycycle DCCorresponding, i.e. TC×(1-DC)。
The most according to claim 1 with light intensity and temperature the control method as parameter, it is characterised in that with Δ T and
Time out of service, the value of i reflects by the time dependent working condition of control system, therefore next cycle
Dutycycle DCChange with the change in value of Δ T and i.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410827120.9A CN105890198B (en) | 2014-12-29 | 2014-12-29 | Control method using light intensity and temperature as parameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410827120.9A CN105890198B (en) | 2014-12-29 | 2014-12-29 | Control method using light intensity and temperature as parameter |
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| Publication Number | Publication Date |
|---|---|
| CN105890198A true CN105890198A (en) | 2016-08-24 |
| CN105890198B CN105890198B (en) | 2018-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410827120.9A Expired - Fee Related CN105890198B (en) | 2014-12-29 | 2014-12-29 | Control method using light intensity and temperature as parameter |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004057288A1 (en) * | 2004-11-26 | 2006-06-01 | Müller, Friedrich Udo | Method for controlling solar heating system with temperature sensors on outlet of solar modules and on heat storage/user point to control operation of circulating pump |
| CN101430139A (en) * | 2007-11-08 | 2009-05-13 | 陈根永 | Light-operated non-beating split type solar water heater |
| CN102042700A (en) * | 2009-10-14 | 2011-05-04 | 陈根永 | Light-controlled thermostatic integrator |
| CN102901244A (en) * | 2012-10-26 | 2013-01-30 | 北京奇迪惠民科技投资有限公司 | Solar-energy photo-thermal control system and method |
| CN202993614U (en) * | 2012-12-28 | 2013-06-12 | 南京信息工程大学 | Water heater controller |
-
2014
- 2014-12-29 CN CN201410827120.9A patent/CN105890198B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004057288A1 (en) * | 2004-11-26 | 2006-06-01 | Müller, Friedrich Udo | Method for controlling solar heating system with temperature sensors on outlet of solar modules and on heat storage/user point to control operation of circulating pump |
| CN101430139A (en) * | 2007-11-08 | 2009-05-13 | 陈根永 | Light-operated non-beating split type solar water heater |
| CN102042700A (en) * | 2009-10-14 | 2011-05-04 | 陈根永 | Light-controlled thermostatic integrator |
| CN102901244A (en) * | 2012-10-26 | 2013-01-30 | 北京奇迪惠民科技投资有限公司 | Solar-energy photo-thermal control system and method |
| CN202993614U (en) * | 2012-12-28 | 2013-06-12 | 南京信息工程大学 | Water heater controller |
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| CN105890198B (en) | 2018-03-27 |
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Granted publication date: 20180327 Termination date: 20211229 |