CN2160894Y - Double-path optical measurer - Google Patents
Double-path optical measurer Download PDFInfo
- Publication number
- CN2160894Y CN2160894Y CN 93213855 CN93213855U CN2160894Y CN 2160894 Y CN2160894 Y CN 2160894Y CN 93213855 CN93213855 CN 93213855 CN 93213855 U CN93213855 U CN 93213855U CN 2160894 Y CN2160894 Y CN 2160894Y
- Authority
- CN
- China
- Prior art keywords
- utility
- amplifier
- model
- photodetector
- optical
- 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.)
- Expired - Fee Related
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- 230000003287 optical effect Effects 0.000 title claims abstract description 24
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000004907 flux Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a double-path optical measurer which comprises a housing, an optical source, an optical device, a photo detector, an amplifier, an A/D converter, a microcomputer and a display component. The utility model is additionally provided with another circuit composed of a photo detector and an amplifier which are connected in parallel with the optical device, the photo detector and the amplifier, and the circuit is connected with the input end of the reference voltage of the and the A/D converter. The measured digital quantity which is N=V< X >/V< R >. K output by the A/D converter of the utility model is a constant, so the measured digital quantity can not be changed by the long term drift and short-term fluctuation of the optical source. Therefore, the utility model eliminates the error of the measuring instrument and enhances the stability, so the utility model is suitable for precision measuring instruments, and the utility model has simple structure and easy use.
Description
The utility model relates to a kind of optical gauge.
Great majority generally are made up of shell, light source, optical devices, photodetector, amplifier, voltage-reference, A/D transducer, microcomputer, display unit with the optical gauge of light source as illumination at present.The output digital quantity N of A/D transducer strictly with V
X/ V
RProportional relation, V
XBe measuring voltage, V
RIt is the reference voltage that provides to the A/D transducer.And measuring voltage V
XIncide optical devices with light source.The variation of spectral radiant flux φ (λ) and proportional variation.Hence one can see that, and as the spectral radiant flux φ of light source (λ) when changing, then the output digital quantity N of A/D transducer also and then changes.This optical gauge is measured the long-term drift of light path light source and the fluctuation of short-term, will produce certain influence to the measurement of fine measuring instrument, unless the power supply of lighting source is comparatively ideal constant current source or constant pressure source.
A kind of reference voltage that provides to the A/D transducer is provided the purpose of this utility model, the optical gauge that changes synchronously along with the variation of measuring voltage.
The purpose of this utility model is achieved in that in existing optical gauge, another road and original optical devices, photodetector, amplifier photodetector, amplifier arranged side by side have been set up, the output termination amplifier input terminal of its photodetector, the reference voltage input of A/D transducer in the output termination optical gauge of amplifier.Because the output digital quantity N=V of A/D transducer
X/ V
RK, K are constant, and reference voltage V
RBe by the voltage of another road photodetector conversion, this voltage and measuring voltage V are provided after amplifier amplifies
XChange synchronously in identical ratio, so the digital quantity N=V of A/D transducer output
X/ V
RThe K=constant remains unchanged.
The utility model makes the reference voltage V of A/D transducer owing to adopted binary channels to measure simultaneously
RWith measuring voltage V
XChange synchronously in identical ratio, therefore, the long term drift of light source and short-term fluctuation can be to the digital quantity N=V of A/D transducer output
X/ V
RK exerts an influence, thereby has eliminated the error of optical gauge, has improved its degree of accuracy.
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is an outside drawing of the present utility model;
Fig. 2 is the cut-open view of optical measurement part;
Fig. 3 is a schematic diagram of the present utility model.
With reference to Fig. 1, on the housing 1 of optical measuring instrument display unit 2 is arranged.
With reference to Fig. 2, Fig. 3, optical devices 4 mainly are made up of lens, Guang Lan, color filter, and photodetector 5 is photoelectric cell or is photomultiplier, amplifier 6 is OP05 or is OP07, OP15, the A/D transducer is MC14433, and microcomputer is 8031, and display unit 2 is LED; The photodetector 7 on another road is photoelectric cell or is photomultiplier that amplifier 8 is OP05 or is OP07, OP15.
The luminous flux φ on the measurement channel direction by light source 3 generations
1(λ) through optical devices 4, be transformed into voltage by photodetector 5 receptions, amplify input A/D transducers by amplifier 6 again; The luminous flux φ on the benchmark channel direction by light source 3 generations
2(λ) received by photodetector 7 simultaneously, be transformed into voltage, amplify the reference voltage terminal of input A/D transducer again by amplifier 8, as the reference voltage of A/D transducer.
Claims (1)
1, a kind of binary channels optical measuring instrument, comprise shell [1], light source [3], optical devices [4], photodetector [5], amplifier [6], A/D transducer, microcomputer, display unit [2], of the present utility model being characterised in that is provided with another road and described optical devices [4], photodetector [5], amplifier [6] photodetector [7], amplifier [8] arranged side by side, the input end of the output termination amplifier [8] of photodetector [7], the reference voltage input of the output termination A/D transducer of amplifier [8].
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 93213855 CN2160894Y (en) | 1993-05-22 | 1993-05-22 | Double-path optical measurer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 93213855 CN2160894Y (en) | 1993-05-22 | 1993-05-22 | Double-path optical measurer |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2160894Y true CN2160894Y (en) | 1994-04-06 |
Family
ID=33794807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 93213855 Expired - Fee Related CN2160894Y (en) | 1993-05-22 | 1993-05-22 | Double-path optical measurer |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2160894Y (en) |
-
1993
- 1993-05-22 CN CN 93213855 patent/CN2160894Y/en not_active Expired - Fee Related
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |