CN100501354C - All-number luminosity and chrominance sensor and its application - Google Patents
All-number luminosity and chrominance sensor and its application Download PDFInfo
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- CN100501354C CN100501354C CNB001250302A CN00125030A CN100501354C CN 100501354 C CN100501354 C CN 100501354C CN B001250302 A CNB001250302 A CN B001250302A CN 00125030 A CN00125030 A CN 00125030A CN 100501354 C CN100501354 C CN 100501354C
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- luminosity
- chromaticity transducer
- transducer
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Abstract
The present invention relates to an all-digital luminosity and chromaticity transducer and its application. Said transducer is formed from colour filter group and optical frequency converter, its output signal is frequency one, and this transducer can be matched with all-digital signal detection system and can be respectively made into the light emission measuring instruments for measuring intensity of light, liminance, chromaticity and colour temp.. As compared with existent technology said invention possesses the following advantages: frequency signal output, simple circuit, low cost and raised comprehensive performance. etc..
Description
The present invention relates to a kind of photometric means and determination of colority method, especially step and a kind of all-number luminosity, chromaticity transducer and application thereof.
In decades, as electrooptical device, light signal is converted to the output of curtage signal with photoelectric cell, photomultiplier etc. for the luminosity sensor of using in the optical radiation measurement technology, chromaticity transducer.This curtage signal amplitude changes continuously with the light signal power, and the signal that promptly existing luminosity sensor and chromaticity transducer are exported is an analog quantity.As everyone knows, measuring the luminosity sensor that illumination, brightness uses in the photometry is made of filter set and photoelectric commutator, and the measurement colourity in the colorimetry, chromaticity transducer that colour temperature is used is made of a plurality of filter set and a plurality of photoelectric commutator, and their output is all analog quantity.There are following defective in existing luminosity, chromaticity transducer and relevant surveying instrument thereof:
1, after the analog quantity of luminosity, chromaticity transducer output need be passed through amplifier, analog switch, A/D converter, interface circuit, signal could be sent into CPU, CPU is by interface circuit control analog switch and A/D converter, A/D converter becomes digital signal to simulating signal, through interface circuit, signal is sent into CPU, and CPU shows result of calculation output, print, store.As seen prior art can not directly be sent the signal of luminosity, chromaticity transducer output into CPU, makes the surveying instrument structure complicated, the production cost height.
2, the measuring accuracy of the drift meeting appreciable impact instrument of amplifier in the analog channel and analog switch, and this influence can't be eliminated.
3, A/D converter can bring transformed error, comprises quantization error and sampling noiset etc., if 12 its transformed errors of A/D conversion chip are 1LSB, to the voltage input signal of full scale, its conversion accuracy is less than ten thousand/magnitude.But in measurement, because by the variation of photometry, the general voltage signal input that is difficult to realize full scale, the then corresponding reduction of accuracy of detection generally can only remain on the per mille magnitude.Even adopt high-resolution 16 A/D conversion chips, its transformed error also will remain on ten thousand/magnitude.The intrinsic sampling noiset of A/D chip also is difficult to overcome simultaneously.
4, exist power supply to disturb: any simulation system, its power supply stable most important, power supply disturbs will directly have influence on the stability of amplifier work, therefore must improve the performance of power supply, need with a large amount of high performance devices, nonetheless, the inhibition to power supply ripple is limited after all.
The object of the present invention is to provide a kind of all-number luminosity, chromaticity transducer, replace existing analog sensor with this luminosity, chromaticity transducer, and all-number luminosity, chromaticity transducer are applied to the measurement of related physical quantity in photometry and the colorimetry and form corresponding optical radiation measurement instrument series.
A kind of all-number luminosity sensor contains color filter group 1, it is characterized in that this luminosity sensor is made of color filter group 1 and light-to-frequency converter 2, and its output signal is a frequency signal.As shown in Figure 1.
A kind of digital chromaticity transducer contains a plurality of color filter group 2, it is characterized in that this chromaticity transducer is made of a plurality of filter set 1 and a plurality of light-to-frequency converter 2, and its output signal is a frequency signal.As shown in Figure 2.
A kind ofly use the photometric instrument that the all-number luminosity sensor is made, it is characterized in that the frequency signal of luminosity sensor output is directly sent into CPU, CPU output measurement result for show, print, storage 3, the external interface circuit 4 that the external communication of conduct is used of CPU.As shown in Figure 3.
A kind ofly use the colour measurement instrument that digital chromaticity transducer is made, the a plurality of frequency signals that it is characterized in that chromaticity transducer output are sent into CPU respectively, CPU output colour measurement result is for showing, print, storing 3, the external interface circuit 4 that the external communication of conduct is used of CPU.As shown in Figure 4.
With prior art relatively, the present invention has following outstanding advantage:
(1) signal of all-number luminosity, chromaticity transducer output is a frequency signal, can directly send into CPU, and existing luminosity, chromaticity transducer output is the analog quantity of curtage, can not directly send CPU to handle.
(2) its structure of optical radiation measurement instrument of utilizing all-number luminosity of the present invention, chromaticity transducer to make is greatly simplified, and used parts are few, and cost is low.
(3) use the optical radiation instrument that luminosity of the present invention, chromaticity transducer are made, as illumination photometry instrument, brightness measurer, colour measurement instrument, colour temperature measurement instrument etc., can save signal amplifier, analog switch, A/D transducer etc., the negative effect of avoiding these parts to bring, drift as the amplifier generation, the transformed error that A/D converter brings, the power supply interference is big etc., thereby has improved the accuracy of detection of instrument and the stability of instrument work.
Fig. 1 is the structural representation of all-number luminosity sensor.
Fig. 2 is the structural representation of digital chromaticity transducer.
Fig. 3 is the structural representation of photometric instrument of the present invention.
Fig. 4 is the structural representation of colour measurement instrument of the present invention.
The all-number luminosity sensor synoptic diagram that Fig. 5 uses for embodiment.
The photometric instrument structural representation that Fig. 6 uses for embodiment.
Embodiment:
As shown in Figure 5, light-to-frequency converter 2 is combined with the filter set 1 with the correction of V (λ) spectrum constitute digital V (λ) sensor.When digital V (λ) sensor matches with digital signal detection system, as shown in Figure 6, CPU adopts 89C52, optical frequency sensor 2 adopts TLS235, measurement result is sent by CPU and is shown printing stored 3, by TTL232, can realize the communication between detection system and other CPU.
Claims (4)
1. an all-number luminosity sensor contains color filter group (1), it is characterized in that: this luminosity sensor is made of color filter group (1) and light-to-frequency converter (2), and its output signal is a frequency signal.
2. a kind of all-number luminosity sensor according to claim 1, it is characterized in that: use described luminosity sensor and make photometric instrument, the frequency signal of luminosity sensor output is directly sent into CPU, CPU photometric output measurement result is for showing, print, store (3), the interface circuit (4) that the external external communication of conduct of CPU is used.
3. a digital chromaticity transducer contains a plurality of color filter group (1), it is characterized in that: this chromaticity transducer is made of a plurality of color filter group (1) and a plurality of light-to-frequency converter (2), and its output signal is a frequency signal.
4. a kind of digital chromaticity transducer according to claim 3, it is characterized in that: use described chromaticity transducer and make the colour measurement instrument, a plurality of frequency signals of chromaticity transducer output are sent into CPU respectively, CPU output colour measurement result is for showing, print, store (3), the interface circuit (4) that the external external communication of conduct of CPU is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001250302A CN100501354C (en) | 2000-09-03 | 2000-09-03 | All-number luminosity and chrominance sensor and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001250302A CN100501354C (en) | 2000-09-03 | 2000-09-03 | All-number luminosity and chrominance sensor and its application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1281972A CN1281972A (en) | 2001-01-31 |
| CN100501354C true CN100501354C (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001250302A Expired - Fee Related CN100501354C (en) | 2000-09-03 | 2000-09-03 | All-number luminosity and chrominance sensor and its application |
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| CN (1) | CN100501354C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095500B (en) * | 2011-01-24 | 2012-09-19 | 杭州电子科技大学 | Circuit for detecting chrominance during gray fabric dyeing |
| CN103424184A (en) * | 2012-05-14 | 2013-12-04 | 富泰华工业（深圳）有限公司 | Light-intensity test device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210106U (en) * | 1987-07-10 | 1988-06-01 | 南京大学 | Colorimetric instrument |
| CN2068676U (en) * | 1990-01-11 | 1991-01-02 | 河北建筑工程学院 | Chromaticity colour analyzer |
-
2000
- 2000-09-03 CN CNB001250302A patent/CN100501354C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210106U (en) * | 1987-07-10 | 1988-06-01 | 南京大学 | Colorimetric instrument |
| CN2068676U (en) * | 1990-01-11 | 1991-01-02 | 河北建筑工程学院 | Chromaticity colour analyzer |
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| Publication number | Publication date |
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| CN1281972A (en) | 2001-01-31 |
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