CN104990904A - Optical dissolved oxygen detector - Google Patents
Optical dissolved oxygen detector Download PDFInfo
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- CN104990904A CN104990904A CN201510352694.XA CN201510352694A CN104990904A CN 104990904 A CN104990904 A CN 104990904A CN 201510352694 A CN201510352694 A CN 201510352694A CN 104990904 A CN104990904 A CN 104990904A
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- circuit
- glass slide
- control circuit
- optical filter
- light source
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Abstract
The invention provides an optical dissolved oxygen detector. The optical dissolved oxygen detector comprises a blue LED light source, a photoelectric detection unit, a convex glass, an optical filter, a glass slide, a sensor film and a control circuit. The blue light emitted from the blue LED light source penetrates through the glass slide and shines on the sensor film, and the emitted fluorescence is received by the photoelectric detection unit through the optical filter and the convex glass. The photoelectric detection unit is transmitted to the glass slide through the convex glass and the optical filter in sequence, the glass slide is stuck to the sensor film tightly, and the sensor film is connected to the control circuit. The optical dissolved oxygen detector has the advantages that the design is reasonable, the detecting result is reliable, the detecting speed is fast, the cost is low, the precision is high, and a good application value is achieved.
Description
Technical field
The present invention is specifically related to a kind of optic dissolution oxygen detection.
Background technology
China's environmental monitoring, the research of monitoring technique in the application etc. of environmental area also also exist no small gap compared with developed countries.The domestic complete equipment also not having oneself to develop in water quality monitoring system at present, great majority adopt external equipment and technology, (the WQMSC water quality monitoring system as ECOTECH company), U.S. SIGMA900 series water-quality sampler etc., but external water quality detection equipment and the most of price of system high, volume is large, the environmental baseline not in full conformity with China had.According to customs statistics, the annual expense for instrument and meter import in the whole nation substantially exceeds the expense for buying domestic equipment, and expensive, procurement cycle grows and various accessory is difficult to the reasons such as acquisition, seriously constrains the development of China's science and technology.Therefore China is badly in need of researching and developing the ambient water quality automatic monitor produced voluntarily.
Summary of the invention
The object of the invention is, for solving above-mentioned deficiency, to provide a kind of optic dissolution oxygen detection.
The object of the invention is to be achieved through the following technical solutions:
A kind of optic dissolution oxygen detection, comprise blue led light source, photodetector unit, convex lens, optical filter, glass slide, sensing membrane and control circuit, the blue light that blue led light source sends is radiated in sensing membrane through glass slide, the fluorescence sent is received by photodetector unit through optical filter and lens, photodetector unit passes to glass slide by convex lens and optical filter successively, sensing membrane is close to by glass slide, sensing membrane connection control circuit.
The present invention also has some technical characteristics like this:
Described control circuit comprises LED control circuit, temperature sensing circuit, clock circuit, A/D convertor circuit, main control unit, serial communication circuit, storage unit circuit, power circuit and PC, LED control circuit gathers blue led light source, photodetector unit connects A/D convertor circuit, main control unit connects LED control circuit, temperature sensing circuit, clock circuit, A/D convertor circuit, serial communication circuit, storage unit circuit and power circuit respectively, and power circuit connects PC.
Described main control unit adopts AT89S52 chip.
Described A/D convertor circuit adopts AD7705 chip.
Described serial communication circuit adopts MAX3221E chip.
The present invention has effect useful as follows:
The present invention is reasonable in design, and testing result is reliable, and detection speed is fast, and cost is low, precision is high, has good using value.
Accompanying drawing explanation
Fig. 1 is physical construction schematic diagram of the present invention;
Fig. 2 is control circuit of the present invention;
Fig. 3 is LED control circuit of the present invention;
Fig. 4 is photodetector unit circuit of the present invention;
Fig. 5 is A/D convertor circuit of the present invention;
Fig. 6 is storage unit circuit of the present invention;
Fig. 7 is main control unit circuit of the present invention;
Fig. 8 is temperature sensing circuit of the present invention;
Fig. 9 is serial communication circuit of the present invention;
Figure 10 is power circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated:
As shown in Figure 1, a kind of optic dissolution oxygen detection, comprises blue led light source 1, photodetector unit 2, convex lens 3, optical filter 4, glass slide 5, sensing membrane 6 and control circuit 16, the blue light that blue led light source 1 sends is radiated in sensing membrane 6 through glass slide 5, the fluorescence sent is received by photodetector unit 2 through optical filter 4 and lens 3, photodetector unit 2 passes to glass slide 5 by convex lens 3 and optical filter 4 successively, sensing membrane 6 is close to by glass slide 5, sensing membrane 6 connection control circuit 16, control circuit 16 comprises LED control circuit 7, temperature sensing circuit 8, clock circuit 9, A/D convertor circuit 10, main control unit 11, serial communication circuit 12, storage unit circuit 13, power circuit 14 and PC 15, LED control circuit 7 gathers blue led light source 1, and photodetector unit 2 connects A/D convertor circuit 10, and main control unit 11 connects LED control circuit 7 respectively, temperature sensing circuit 8, clock circuit 9, A/D convertor circuit 10, serial communication circuit 12, storage unit circuit 13 and power circuit 14, power circuit 14 connects PC 15, and main control unit adopts AT89S52 chip, and A/D convertor circuit adopts AD7705 chip, and serial communication circuit adopts MAX3221E chip.
Voltage input end 1 pin of photodetector unit: OPT301 meets+5V, voltage negative input end 3 pin ground connection, OPT301 is subject to the impact of environment parasitic light under physical environment, have small voltage during zero input to export, so common port 8 pin changes by connecing signal ground the dividing potential drop to ten 5V meeting R5 into, 8 pin are connected in series a filter capacitor with between signal ground simultaneously, to eliminate the impact of voltage fluctuation on circuit.Voltage on R5 is connected to the negative input end AIN2 (-) of the passage 2 of analog to digital converter AD7705 as simulation negative input end, feedback end 4 pin of OPT301 is connected jointly with signal output part 5 pin, and the positive input terminal AIN2 (+) of the passage 2 of analog to digital converter AD7705 is connected to as analog output, so just form one group of analogue measurement signal by 4,5 pin and 8 pin.
Serial communication circuit: MAX3221 needs 4 0.1 electric capacity frightened, power supply connects the filter capacitor of a 0.1 μ F, T1IN is the input end that serial sends, meet the TXD (P3.1) of AT89S52 single board computer, R1OUT is the input end of serial received, meet the RXD (P3.0) of AT89S52, T1OUT and R1IN connects output and the input of RS-232 signal respectively.Because power consumption is extremely important in the design of hand-held kind equipment, connecing high level at this FORCEOFF, FORCEON ground connection, making chip without entering pass power supply status during useful signal, to reduce power consumption.
Power circuit: LM2937 input end Vin connects+9V DC voltage, with indirect two filter capacitor 470 μ F and 0.1 μ F on ground, to remove high and low frequency fluctuation; Output end vo ut meets mainboard+5V supply line, meets filter capacitor 220 μ F and 0.1 μ F equally, to obtain stable voltage.
Claims (5)
1. an optic dissolution oxygen detection, comprise blue led light source, photodetector unit, convex lens, optical filter, glass slide, sensing membrane and control circuit, it is characterized in that: the blue light that blue led light source sends is radiated in sensing membrane through glass slide, the fluorescence sent is received by photodetector unit through optical filter and lens, photodetector unit passes to glass slide by convex lens and optical filter successively, sensing membrane is close to by glass slide, sensing membrane connection control circuit.
2. a kind of optic dissolution oxygen detection as claimed in claim 1, it is characterized in that: described control circuit comprises LED control circuit, temperature sensing circuit, clock circuit, A/D convertor circuit, main control unit, serial communication circuit, storage unit circuit, power circuit and PC, LED control circuit gathers blue led light source, photodetector unit connects A/D convertor circuit, main control unit connects LED control circuit respectively, temperature sensing circuit, clock circuit, A/D convertor circuit, serial communication circuit, storage unit circuit and power circuit, power circuit connects PC.
3. a kind of optic dissolution oxygen detection as claimed in claim 2, is characterized in that: described main control unit adopts AT89S52 chip.
4. a kind of optic dissolution oxygen detection as claimed in claim 2, is characterized in that: described A/D convertor circuit adopts AD7705 chip.
5. a kind of optic dissolution oxygen detection as claimed in claim 2, is characterized in that: described serial communication circuit adopts MAX3221E chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352694.XA CN104990904A (en) | 2015-06-24 | 2015-06-24 | Optical dissolved oxygen detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352694.XA CN104990904A (en) | 2015-06-24 | 2015-06-24 | Optical dissolved oxygen detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104990904A true CN104990904A (en) | 2015-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510352694.XA Pending CN104990904A (en) | 2015-06-24 | 2015-06-24 | Optical dissolved oxygen detector |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050047888A (en) * | 2003-11-18 | 2005-05-23 | 한국과학기술연구원 | Lab-on-a-chip using overall light-emiiting source |
| CN1731154A (en) * | 2005-08-17 | 2006-02-08 | 国家海洋局第一海洋研究所 | Underwater real-time optical dissolved oxygen measuring device |
| CN101750402A (en) * | 2008-12-17 | 2010-06-23 | 中国科学院大连化学物理研究所 | Optical oxygen sensor |
| CN202110139U (en) * | 2011-05-31 | 2012-01-11 | 中国农业大学 | Underwater optical dissolved oxygen sensor |
| JP2014197005A (en) * | 2014-04-25 | 2014-10-16 | 株式会社ヴィーネックス | Optical line sensor apparatus and discrimination method of securities |
| CN104236604A (en) * | 2013-06-14 | 2014-12-24 | 天津奇谱光电技术有限公司 | Fluorescence method optical fiber sensor |
| CN102854174B (en) * | 2011-07-25 | 2015-05-13 | 中国科学院烟台海岸带研究所 | Fluorescent dissolved oxygen online measure device, and dissolved oxygen detection method using it |
-
2015
- 2015-06-24 CN CN201510352694.XA patent/CN104990904A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050047888A (en) * | 2003-11-18 | 2005-05-23 | 한국과학기술연구원 | Lab-on-a-chip using overall light-emiiting source |
| CN1731154A (en) * | 2005-08-17 | 2006-02-08 | 国家海洋局第一海洋研究所 | Underwater real-time optical dissolved oxygen measuring device |
| CN101750402A (en) * | 2008-12-17 | 2010-06-23 | 中国科学院大连化学物理研究所 | Optical oxygen sensor |
| CN202110139U (en) * | 2011-05-31 | 2012-01-11 | 中国农业大学 | Underwater optical dissolved oxygen sensor |
| CN102854174B (en) * | 2011-07-25 | 2015-05-13 | 中国科学院烟台海岸带研究所 | Fluorescent dissolved oxygen online measure device, and dissolved oxygen detection method using it |
| CN104236604A (en) * | 2013-06-14 | 2014-12-24 | 天津奇谱光电技术有限公司 | Fluorescence method optical fiber sensor |
| JP2014197005A (en) * | 2014-04-25 | 2014-10-16 | 株式会社ヴィーネックス | Optical line sensor apparatus and discrimination method of securities |
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Application publication date: 20151021 |
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