CN101004397A - Intellectualized, rapid measuring cold mirror dew point instrument - Google Patents
Intellectualized, rapid measuring cold mirror dew point instrument Download PDFInfo
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- CN101004397A CN101004397A CN 200710062763 CN200710062763A CN101004397A CN 101004397 A CN101004397 A CN 101004397A CN 200710062763 CN200710062763 CN 200710062763 CN 200710062763 A CN200710062763 A CN 200710062763A CN 101004397 A CN101004397 A CN 101004397A
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- dew point
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Abstract
A dew point apparatus of cold mirror is prepared for forming dew point chamber by coil cover, base body in separation mode, beam splitter, mirror surface and semiconductor-refrigerator; forming heat radiation unit by heat tube radiator and fan; setting DSP fuzzy controller in control unit and connecting bottom of dew point chamber to heat radiation unit.
Description
Technical field
The present invention relates to a kind of dew point meter device, measure the content of moisture in the gas by the test dew point.
Background technology
The Cold Mirrors dew point hygrometer is a kind of typical photoelectric dew-point hygrometer, adopts the thermoelectric cooling method, is caught by minute surface and reveals or frost, judges dew point with photoelectric method, and measures dew point by platinum-resistance thermometer.
The heating radiator of existing Cold Mirrors dew point hygrometer adopts whole aluminum fin keel shape radiator heat radiation, fit with the outer bottom of heat-conducting cream and matrix in the bottom surface of heat sink arrangement, the heat dispersion of instrument is poor, causes refrigerating capacity deficiency, the measurement stability of instrument poor, Measuring Time is longer.In addition, the controller of instrument generally adopts the PID adjustment control method, and the equilibration time is longer, needs could finally reach equilibrium point through the process of repeatedly similar damped oscillation, makes that also stability of instrument is undesirable, the speed that influence is measured.
Summary of the invention
For addressing the above problem, the invention provides a kind of Intellectualized, rapid measuring cold mirror dew point instrument, the structure of existing Cold Mirrors dew point hygrometer is done significant improvement, thereby improved the measuring speed and the precision of instrument, and can realize the intellectuality of measuring process.
Intellectualized, rapid measuring cold mirror dew point instrument provided by the invention, comprise dew point chamber, cooling system, control system, described dew point chamber comprises spiral cover, matrix, optical splitter, minute surface, semiconductor cooler, described cooling system comprises heating radiator and fan, described control system is provided with controller, bottom, dew point chamber is connected with cooling system, it is characterized in that: described cooling system adopts heat-pipe radiator, is connected by the matrix of flexible conducting strip with the dew point chamber; The matrix of described dew point chamber is split type, closely connects into a cavity by O-ring seal between the split; Described controller adopts the DSP fuzzy controller.
The inside of described dew point hygrometer also is provided with micro pressure sensor.
The control method that described DSP fuzzy controller may further comprise the steps: the light signal of gathering reflection minute surface frost thickness with regular time at interval; Calculate difference E, the luminous energy rate of change Δ E of current luminous energy and control target; Judge the grade interval at E and Δ E place according to default fuzzy control program; The digital quantity of calculation control refrigeration electric current, and become working current through digital-to-analog conversion; The Control work electric current makes luminous energy reach control target; Control luminous energy rate of change is in allowed band; Stop fuzzy control and carry out exporting the result after the pressure correction.
Owing to adopted heat-pipe radiator, and heating radiator is connected by flexible heat conduction pad with matrix, make the capacity of heat transmission greatly improve, the heat of matrix can be taken away and be lost in the environment apace, even if under the working condition of or frequent high-power refrigeration continuous at refrigeration unit, the refrigeration unit hot junction can not produce heat accumulation yet, and it is the same with environment temperature that the temperature of matrix can keep all the time, thereby guaranteed the stability of instrument, especially more apparent its advantage of continuous working in hot environment.
Owing to adopt DSP fuzzy Control minute surface frost thickness, controller can adapt to any parameter variation of controlled device and revise in real time, thereby guaranteed measuring stability, made frost thickness can reach desired value as soon as possible, improved the measuring speed of instrument significantly.
Description of drawings
Fig. 1 is the dew point chamber and the cooling system structural representation of Intellectualized, rapid measuring cold mirror dew point instrument of the present invention;
Fig. 2 is a DSP fuzzy control process flow diagram of the present invention.
Embodiment
Further specify the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the dew point chamber of dew point hygrometer comprises optical splitter 1, minute surface 2, semiconductor cooler 3, spiral cover 4, matrix, matrix adopting is split type, be divided into upper and lower two, piece 5 is as the structure function body on the matrix, piece 6 adds O-ring seal between the two and closely connects into a cavity with screw as the heat conduction functive under the matrix.Compare with existing integral structure, split-type structural can be so that the operation of semiconductor cooler 3 when being pasted on the matrix inside surface becomes easily, thereby guarantees the sticking Quality and the radiating effect of refrigerator.The cooling system of dew point hygrometer adopts heat-pipe radiator, comprises heat pipe 7 and fin 8, is connected by the matrix 6 of flexible conducting strip 9 with instrument dew point chamber.
Fig. 2 is a DSP fuzzy control process flow diagram.In measuring process, the target of fuzzy control be will the reflection frost thickness receiving optical signals control to a certain fixed value, be controlled at 60% of frostless when layer light signal usually, and to keep light rate of change at that time be zero.After controller begins to carry out fuzzy control, gather light signal at interval with regular time, and calculate the difference E of current luminous energy and control target, luminous energy rate of change Δ E.In control program, the absolute value of difference E is divided into little, in, big Three Estate, the grade boundary line is X1, X2, X3, wherein X1＜X2＜X3; With the rate of change Δ E absolute value of luminous energy also be divided into little, in, big Three Estate, the grade boundary line is Y1, Y2, Y3, wherein Y1＜Y2＜Y3.Scale-up factor interval [Kpmin, Kpmax], differential coefficient interval [Kdmin, Kdmax].Program is at first judged E and Δ E respectively in which grade interval, again according to the various combination of E and Δ E select corresponding fuzzy control rule calculation control parameter (Kp, Ki, Kd).After determining parameter, substitution control formula U=Kp*E+Ki* ∑ E+Kd* Δ E calculates the digital quantity of control refrigeration electric current, is the working current of voltage signal control refrigeration unit through digital-to-analog conversion.Make luminous energy reach control target by the Control work electric current; Control luminous energy rate of change is in allowed band; Stop fuzzy control and carry out pressure correction, draw measured value accurately after according to the actual pressure of measuring measurement result being proofreaied and correct.Owing to adopted the fuzzy controller of real-time control, make the equilibration time of frost layer shorten dramatically, the measuring speed of instrument is able to bigger raising.And because fuzzy controller is monitored in real time to the variation of frost thickness and frost thickness, make the equilibrium state of frosting be able to intelligent judgement, got rid of the operator and caused the inaccurate generation of measurement because of lacking experience, improved the measuring accuracy of instrument.
Claims (3)
1. Intellectualized, rapid measuring cold mirror dew point instrument, comprise dew point chamber, cooling system, control system, described dew point chamber comprises spiral cover, matrix, optical splitter, minute surface, semiconductor cooler, described cooling system comprises heating radiator and fan, described control system is provided with controller, bottom, dew point chamber is connected with cooling system, it is characterized in that: described cooling system adopts heat-pipe radiator, is connected by the matrix of flexible conducting strip with the dew point chamber; The matrix of described dew point chamber is split type, closely connects into a cavity by O-ring seal between the split; Described controller adopts the DSP fuzzy controller.
2. a kind of Intellectualized, rapid measuring cold mirror dew point instrument according to claim 1 is characterized in that: the inside of described dew point hygrometer also is provided with micro pressure sensor.
3. a kind of Intellectualized, rapid measuring cold mirror dew point instrument according to claim 1 is characterized in that: the control method that described DSP fuzzy controller may further comprise the steps:
Gather the light signal of reflection minute surface frost thickness at interval with regular time;
Calculate difference E, the luminous energy rate of change Δ E of current luminous energy and control target;
Judge the grade interval at E and Δ E place according to default fuzzy control program;
The digital quantity of calculation control refrigeration electric current, and become working current through digital-to-analog conversion;
The Control work electric current makes luminous energy reach control target;
Control luminous energy rate of change is in allowed band;
Stop fuzzy control and carry out exporting the result after the pressure correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100627639A CN101004397B (en) | 2007-01-16 | 2007-01-16 | Intellectualized, rapid measuring cold mirror dew point instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100627639A CN101004397B (en) | 2007-01-16 | 2007-01-16 | Intellectualized, rapid measuring cold mirror dew point instrument |
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| Publication Number | Publication Date |
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| CN101004397A true CN101004397A (en) | 2007-07-25 |
| CN101004397B CN101004397B (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100627639A Expired - Fee Related CN101004397B (en) | 2007-01-16 | 2007-01-16 | Intellectualized, rapid measuring cold mirror dew point instrument |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236166B (en) * | 2008-02-19 | 2010-06-02 | 丁五行 | Chilled-mirror type dew point instrument control method |
| CN102128858A (en) * | 2010-12-10 | 2011-07-20 | 马舒庆 | Differential dew point measuring method and device |
| CN102636519A (en) * | 2011-02-12 | 2012-08-15 | 北京兴泰学成仪器有限公司 | Method and device for rapidly and accurately determining dew point of low-humidity gas |
| CN106706708A (en) * | 2015-11-16 | 2017-05-24 | 杨斌 | Control method of rapid high-precision cold mirror type dew-point instrument |
| CN109085201A (en) * | 2018-09-12 | 2018-12-25 | 南京信息工程大学 | A kind of ultra-low humidity dew point hygrometer and its temprature control method |
| CN110146546A (en) * | 2019-06-17 | 2019-08-20 | 秦燕 | A kind of chilled-mirror type dew point instrument automatic optoelectronic detection system |
| CN112394086A (en) * | 2020-12-07 | 2021-02-23 | 广州奥松电子有限公司 | Dewing system and dew point instrument thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201000442Y (en) * | 2007-01-16 | 2008-01-02 | 丁五行 | Intelligentized rapid survey cold mirror dew point hygrometer |
-
2007
- 2007-01-16 CN CN2007100627639A patent/CN101004397B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236166B (en) * | 2008-02-19 | 2010-06-02 | 丁五行 | Chilled-mirror type dew point instrument control method |
| CN102128858A (en) * | 2010-12-10 | 2011-07-20 | 马舒庆 | Differential dew point measuring method and device |
| CN102128858B (en) * | 2010-12-10 | 2012-09-05 | 马舒庆 | Differential dew point measuring method and device |
| CN102636519A (en) * | 2011-02-12 | 2012-08-15 | 北京兴泰学成仪器有限公司 | Method and device for rapidly and accurately determining dew point of low-humidity gas |
| CN106706708A (en) * | 2015-11-16 | 2017-05-24 | 杨斌 | Control method of rapid high-precision cold mirror type dew-point instrument |
| CN109085201A (en) * | 2018-09-12 | 2018-12-25 | 南京信息工程大学 | A kind of ultra-low humidity dew point hygrometer and its temprature control method |
| CN109085201B (en) * | 2018-09-12 | 2023-09-15 | 南京信息工程大学 | Ultralow humidity dew point meter and temperature control method thereof |
| CN110146546A (en) * | 2019-06-17 | 2019-08-20 | 秦燕 | A kind of chilled-mirror type dew point instrument automatic optoelectronic detection system |
| CN110146546B (en) * | 2019-06-17 | 2022-01-18 | 深圳市一量检测有限公司 | Automatic photoelectric detection system of cold mirror type dew point instrument |
| CN112394086A (en) * | 2020-12-07 | 2021-02-23 | 广州奥松电子有限公司 | Dewing system and dew point instrument thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101004397B (en) | 2010-10-06 |
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Addressee: Ding Wuxing Document name: Review of business letter |
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Owner name: ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID QING Effective date: 20141209 |
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Effective date of registration: 20141209 Address after: The two district 102208 Beijing city Changping District Small Town Cloud Qu Yuan District 8 Building 4 No. 401 Patentee after: Ding Wuxing Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID QINGHAI ELECTRIC POWER Co. Address before: Beijing city two district 102208 District 8 Changping District Small Town Cloud Qu Yuan Building 4 unit 401 Patentee before: Ding Wuxing |
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