CN200956012Y - COD photoelectrical detecting device - Google Patents
COD photoelectrical detecting device Download PDFInfo
- Publication number
- CN200956012Y CN200956012Y CN 200620107383 CN200620107383U CN200956012Y CN 200956012 Y CN200956012 Y CN 200956012Y CN 200620107383 CN200620107383 CN 200620107383 CN 200620107383 U CN200620107383 U CN 200620107383U CN 200956012 Y CN200956012 Y CN 200956012Y
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- light
- circuit board
- light path
- control circuit
- cod
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- Expired - Lifetime
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Abstract
The utility model relates to a COD photoelectric checking device, which comprises at least a light source for emission, a light checking device, a measure light path, a photocell and a control circuit board. The light source comprises at least two light emitting diodes which emit light with different wavelength. The behind part of the emitting diodes are provided with two light path checking devices respectively, and consist of a light checking device, a measure light path and a photocell. The light path checking devices are connected to the control circuit board and used for analyzing the measurement result. Two light beam cutters are arranged in front of the light checking devices respectively. References compensating optical paths are educed to reference checking device and fed back to the control circuit board respectively. The utility model has characteristics of simple structure, reliable and convenient operation, and high precision for checking.
Description
Technical field
The utility model relates to a kind of COD of being applicable to and detect and use, and according to the project of required detection, change light source after, can be widely used in the photoelectric detection system of instrumental analysis such as environmental protection, chemical analysis, doctor's instrument, medicine analysis.
Background technology
Present COD photoelectric detection system generally adopts single wavelength to detect, and detects wavelength generally at 600-620nm, and its primary structure is formed and comprised transmitting illuminant, light inspection device, surveying work light path, photoelectric cell and control circuit board etc.For the method for colorimetric detection, product generally adopts 600-630nm to detect Cr both at home and abroad at present at present
3+Also there is the product of small part producer to adopt the 380-420nm wavelength to detect Cr
6+, to detect low concentration COD.Above-mentioned in addition detecting instrument is subjected to the influence of external environments such as temperature easily when detecting, can have the problem of zero point drift in testing process, thereby has influenced the stability and the accuracy that detect.Because at present the photoelectric detection system ubiquity detects the phenomenon of zero drift, thereby before each the detection, all needs proofreading and correct zero point, thereby increased testing staff's workload, make it use to go up and have inconvenience, the not high defective of precision.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of above-mentioned existence, and the design of a kind of double light path, easy to use, COD photoelectric detection system that accuracy of detection is high are provided.Which comprises at least transmitting illuminant, light inspection device, surveying work light path, photoelectric cell and control circuit board, described transmitting illuminant is made up of the light emitting diodes of two emission different wave length light paths at least, is respectively arranged with behind two light emitting diodes to examine light path detecting device that device, surveying work light path, photoelectric cell constitute by light and be connected to and do the testing result analysis on the control circuit board.
Be provided with respectively by the light beam dispenser before described two light inspection device and also lead to reference compensation light path separately to reference detector, feedback is connected to control circuit board.
When the light wave of the certain wavelength of the utility model utilization passes through liquid, proportional this principle of concentration of material in absorbed light intensity and this liquid; Be Cr
3+Ion near the wavelength of 610nm, Cr
6+Ion has bigger absorption value near the wavelength of 400nm; At COD
CrTesting process in, by Cr after the detection reaction
3+Perhaps Cr
6+Concentration, can extrapolate COD
CrValue.Compare with the electrode method, adopt the method for Photoelectric Detection, has the advantage that detecting device and fluid to be measured need not directly to contact, this contactless detection method, make detecting device not need to contact with the extremely strong digestion solution of corrosivity, greatly facilitate the maintenance work of instrument, prolonged the serviceable life of detecting device.
The utility model is by detecting two indexs simultaneously, and two testing results are carried out hybrid operation, finally draws the COD value; Owing to adopted the light-source system of two-way single wavelength, omitted beam splitting systems such as grating or prism simultaneously, made to detect to have higher specificity.The utility model can also be according to the required optical source wavelength of project of need detection, behind the replacing light source, can detect in the scope of other wavelength.Owing to adopted the feedback control system of closed loop, can effectively eliminate the detection drift of instrument; Thereby make characteristics such as the utlity model has simple in structure, easy to use, reliable, accuracy of detection height.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is that dual wavelength feedback of the present utility model is waitd upon clothes light path detection schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in detail: Fig. 1, shown in Figure 2, the utility model include transmitting illuminant 1, light inspection device 2, surveying work light path 3, photoelectric cell 4 and control circuit board 5 etc. at least.Described transmitting illuminant 1 is made up of the light emitting diodes of two emission different wave length light paths, is respectively arranged with behind two light emitting diodes to examine two-way light path detecting device that device 2, surveying work light path 3, photoelectric cell 4 constitute by light and be connected to and do the testing result analysis on the control circuit board 5.Be respectively arranged with light beam dispenser 6 and lead to reference compensation light path 7 separately to reference detector 8 before described two light inspection device 2, feedback is connected to control circuit board 5.
Each of pick-up unit described in the utility model detects wavelength and all designs for double light path, ultimate principle that it adopts and common spectrophotometer are basic identical, adopted the center emission wavelength be 610 or the light emitting diode of 400nm as emitting components, and light signal is converted into electric signal by photoelectric cell.
The utility model is set up following mathematical model, and the testing result that two detecting devices obtain is analyzed, and finally obtains testing result.
400nm detected value: C1=f (T1)
610nm detected value: C2=f (T2) T1, T2 are absorbance
Final detected value: C=F (C1, C2)
For eliminating the drifting problem in the instrument detecting process, adopted the accurate constant current control self compensating system of closed loop, by a feedback transducer, the detection drift that environmental factors such as light source Yin Wendu are caused compensates automatically, has effectively eliminated the drawback of this disturbing effect testing result correctness and stability.
Claims (2)
1, a kind of COD photoelectric detection system, which comprises at least transmitting illuminant, light inspection device, surveying work light path, photoelectric cell and control circuit board, it is characterized in that described transmitting illuminant (1) is made up of the light emitting diodes of two emission different wave length light paths at least, the two-way light path detecting device that is respectively arranged with by light inspection device (2), surveying work light path (3), photoelectric cell (4) formation behind two light emitting diodes is connected on the control circuit board (5).
2, COD photoelectric detection system according to claim 1, it is characterized in that preceding the setting respectively by light beam dispenser (6) of described two light inspection devices (2) also leads to reference compensation light path (7) separately to reference detector (8), feedback is connected to control circuit board (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107383 CN200956012Y (en) | 2006-08-30 | 2006-08-30 | COD photoelectrical detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107383 CN200956012Y (en) | 2006-08-30 | 2006-08-30 | COD photoelectrical detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200956012Y true CN200956012Y (en) | 2007-10-03 |
Family
ID=38774598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620107383 Expired - Lifetime CN200956012Y (en) | 2006-08-30 | 2006-08-30 | COD photoelectrical detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200956012Y (en) |
-
2006
- 2006-08-30 CN CN 200620107383 patent/CN200956012Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Effective date of registration: 20090410 Pledge (preservation): Pledge |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20101222 Granted publication date: 20071003 Pledgee: Hangzhou Xuefeng Chain Co., Ltd. Pledgor: Chen Ming Registration number: 2009330000533 |
|
| ASS | Succession or assignment of patent right |
Owner name: HANGZHOU FUMING ENVIRONMENTAL TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CHEN MING Effective date: 20110513 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 310023 NO. B3, WUCHANG AVENUE, WUCHANG DEVELOPMENT AREA, YUHANG DISTRICT, HANGZHOU CITY, ZHEJIANG PROVINCE TO: 310053 BUILDING 6 (HANGZHOU HIGH-TECH. SOFTWARE PARK), NO. 1, WEIYE ROAD, BINJIANG DISTRICT, HANGZHOU CITY, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110513 Address after: 310053 building, No. 1, Albert Road, Hangzhou, Zhejiang, Binjiang District (Hangzhou hi tech software park), 6 Patentee after: Hangzhou Fuming Environment Technology Co., Ltd. Address before: 310023, Wuchang Road, Wuchang Development Zone, Yuhang District, Zhejiang, Hangzhou, B3 Patentee before: Chen Ming |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: COD photoelectric detection device Effective date of registration: 20140321 Granted publication date: 20071003 Pledgee: CITIC Bank, Limited by Share Ltd, Hangzhou, Xiaoshan branch Pledgor: Hangzhou Fuming Environment Technology Co., Ltd. Registration number: 2014330000008 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071003 |
|
| EXPY | Termination of patent right or utility model |