CN105628738A - High-precision dew-point instrument provided with dual-optical-path system - Google Patents
High-precision dew-point instrument provided with dual-optical-path system Download PDFInfo
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- CN105628738A CN105628738A CN201510986509.2A CN201510986509A CN105628738A CN 105628738 A CN105628738 A CN 105628738A CN 201510986509 A CN201510986509 A CN 201510986509A CN 105628738 A CN105628738 A CN 105628738A
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- sensor
- observing
- measurement module
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- optical
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
- G01N25/66—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point
- G01N25/68—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point by varying the temperature of a condensing surface
Abstract
The invention discloses a high-precision dew-point instrument provided with a dual-optical-path system. The high-precision dew-point instrument comprises a temperature sensing unit, a dual-optical-path detection unit and an observing unit, wherein the temperature sensing unit comprises a temperature sensor, a sensor prefixed amplifying circuit connected with the temperature sensor, an A/D conversion circuit connected with the sensor prefixed amplifying circuit and a nonlinear correction control circuit, wherein a nonlinear correction control system divides an input signal into different sections according to different temperature values and then enables the sections where the input signal is located to multiply by different compensation factors to perform correction. The dual-optical-path detection unit comprises a reflected light measurement module and a scattered light measurement module, wherein the reflected light measurement module and the scattered light measurement module perform measurement simultaneously. The observing unit comprises an observing microscope for observing a mirror plane and facilitating accurate and timely result observing performed by a user. The high-precision dew-point instrument is high in measurement accuracy, more convenient to use and more accurate in measurement.
Description
Technical field
The present invention relates to a kind of dew point hygrometer, particularly relate to a kind of high-accuracy dew point meter with double beam system.
Background technology
Dew point hygrometer is the instrument that can directly measure dew point temperature. Make a mirror lower the temperature in sample humid air, until dimly visible dew drips the moment of (or ice crystal) on minute surface, measure minute surface mean temperature, be dew (frost) some temperature. Its humidity measurement precision is high, but the significantly high dew of the minute surface that light requirement cleanliness is significantly high, the temperature control system that precision is significantly high, and sensitivity drips the optical detection system of (ice crystal). The pipeline that must make suction sample air during use keeps cleaning, and otherwise absorption or releasing moisture are caused measurement error by the impurity in pipeline. Certainty of measurement is the important performance indexes of dew point hygrometer, and particularly in laboratory use procedure, the certainty of measurement for dew point hygrometer requires more to increase. And common dew point hygrometer, due to the non-linear shift in measurement process, and the reason such as the scattering of light easily causes bigger error. Meanwhile, dew point measurement is largely dependent upon survey crew observation promptly and accurately, if observing inaccurate, is then also unable to reach good accuracy.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides a kind of high-accuracy dew point meter with double beam system.
For reaching above-mentioned purpose, the technical solution adopted in the present invention is: a kind of high-accuracy dew point meter with double beam system includes temperature sensing unit, double light path probe unit and observing unit, described temperature sensing unit includes temperature sensor and the sensor preamplifier circuit being connected with temperature sensor, the A/D change-over circuit being connected with sensor preamplifier circuit and gamma correction control circuit, described gamma correction controls system and input signal is divided into different section according to different temperature values, section further according to its place is multiplied by different penalty coefficients respectively, it is corrected, described double light path probe unit includes reflected light measurement module and scattering optical measuring module, and reflected light measurement module and scattering optical measuring module measure simultaneously, described observing unit includes a viewing microscope, observes for minute surface, it is simple to user observed result accurately and timely.
Further, described temperature sensor is platinum filament thermal resistance sensor.
Further, the reference column used in described detection uses toolenzyme same kind deactivated enzyme.
The method have the benefit that: non-linear shift is effectively corrected by the gamma correction control circuit in temperature sensing unit, double light path probe unit adds the sensitivity to light simultaneously, detected by gamma correction and double light path, greatly improve measuring accuracy, adopt the viewing microscope can convenient, observed result accurately by user.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further elaborated.
A kind of high-accuracy dew point meter with double beam system includes temperature sensing unit, double light path probe unit and observing unit, described temperature sensing unit includes temperature sensor and the sensor preamplifier circuit being connected with temperature sensor, the A/D change-over circuit being connected with sensor preamplifier circuit and gamma correction control circuit, described gamma correction controls system and input signal is divided into different section according to different temperature values, section further according to its place is multiplied by different penalty coefficients respectively, is corrected; Described double light path probe unit includes reflected light measurement module and scattering optical measuring module, and reflected light measurement module and scattering optical measuring module measure simultaneously; Described observing unit includes a viewing microscope, observes for minute surface, it is simple to user observed result accurately and timely.
Described temperature sensor is platinum filament thermal resistance sensor.
The reference column used in described detection uses toolenzyme same kind deactivated enzyme.
Temperature sensing unit, double light path probe unit, observing unit combination, experimental result can be prevented effectively from and depend on the personal error of survey crew. Non-linear shift is effectively corrected by the gamma correction control circuit in temperature sensing unit, double light path probe unit adds the sensitivity to light simultaneously, detected by gamma correction and double light path, greatly improve measuring accuracy, adopt the viewing microscope can convenient, observed result accurately by user.
Above-described embodiment is explanation of the invention, it is impossible to be illustrative as limitation of the present invention, description of the invention and application, is not wishing to limit the scope of the invention in above-described embodiment. The deformation of embodiments disclosed herein and change are possible, for those skilled in the art embodiment replace and the various parts of equivalence are known. It should be appreciated by the person skilled in the art that when without departing from the spirit of the present invention or substitutive characteristics, the present invention can in other forms, structure, layout, ratio, and realize with other assembly, material and parts. When without departing from the scope of the invention and spirit, it is possible to embodiments disclosed herein is carried out other deformation and changes.
Claims (3)
1. a high-accuracy dew point meter with double beam system, it is characterized in that: include temperature sensing unit, double light path probe unit and observing unit, described temperature sensing unit includes temperature sensor and the sensor preamplifier circuit being connected with temperature sensor, the A/D change-over circuit being connected with sensor preamplifier circuit and gamma correction control circuit, described gamma correction controls system and input signal is divided into different section according to different temperature values, section further according to its place is multiplied by different penalty coefficients respectively, is corrected; Described double light path probe unit includes reflected light measurement module and scattering optical measuring module, and reflected light measurement module and scattering optical measuring module measure simultaneously; Described observing unit includes a viewing microscope, observes for minute surface, it is simple to user observed result accurately and timely.
2. the high-accuracy dew point meter with double beam system according to claim 1, it is characterised in that: described temperature sensor is platinum filament thermal resistance sensor.
3. the high-accuracy dew point meter with double beam system according to claim 1, it is characterised in that: the reference column used in described detection uses toolenzyme same kind deactivated enzyme.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510986509.2A CN105628738A (en) | 2015-12-26 | 2015-12-26 | High-precision dew-point instrument provided with dual-optical-path system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510986509.2A CN105628738A (en) | 2015-12-26 | 2015-12-26 | High-precision dew-point instrument provided with dual-optical-path system |
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| CN105628738A true CN105628738A (en) | 2016-06-01 |
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| CN201510986509.2A Pending CN105628738A (en) | 2015-12-26 | 2015-12-26 | High-precision dew-point instrument provided with dual-optical-path system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501313A (en) * | 2016-10-12 | 2017-03-15 | 江苏鸿源动力科技有限公司 | A kind of chilled-mirror type dew point instrument of bimirror face double light path |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109479A (en) * | 2009-12-24 | 2011-06-29 | 上海莫克电子技术有限公司 | High-accuracy dew point meter with double optical path system |
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2015
- 2015-12-26 CN CN201510986509.2A patent/CN105628738A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109479A (en) * | 2009-12-24 | 2011-06-29 | 上海莫克电子技术有限公司 | High-accuracy dew point meter with double optical path system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501313A (en) * | 2016-10-12 | 2017-03-15 | 江苏鸿源动力科技有限公司 | A kind of chilled-mirror type dew point instrument of bimirror face double light path |
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Application publication date: 20160601 |