CN104406938A - Reflective infrared sediment sensor for measuring content of sediment in water flow - Google Patents
Reflective infrared sediment sensor for measuring content of sediment in water flow Download PDFInfo
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- CN104406938A CN104406938A CN201410796105.2A CN201410796105A CN104406938A CN 104406938 A CN104406938 A CN 104406938A CN 201410796105 A CN201410796105 A CN 201410796105A CN 104406938 A CN104406938 A CN 104406938A
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- infrared light
- photodetector
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Abstract
The invention provides a reflective infrared sediment sensor for measuring the content of sediment in a water flow, belongs to the technical field of sensors, and aims to solve the problem that existing infrared sediment sensors for measuring the content of the sediment are high in cost. The sensor comprises a processing circuit, a photoelectric detector, a shading sleeve, infrared sources and a glass cover, wherein the photoelectric detector, the shading cover and the infrared sources are arranged in the glass cover, the outer surface of the photoelectric detector is sleeved with the shading sleeve, and the infrared sources are used for emitting infrared light to the water flow with the content of the sediment to be measured through the glass cover; the photoelectric detector is used for detecting infrared light reflected and scattered by the sediment in the water flow through the glass cover; the processing circuit acquires an analog signal of the sediment content according to the intensity of the infrared light detected by the photoelectric detector; the lower end of the shading sleeve is in seamless connection with the bottom plane of the glass cover. The sensor is applied to fields of water and soil conservation research, water and soil loss monitoring and the like.
Description
Technical field
The invention belongs to sensor technical field, particularly a kind of reflective infrared silt sensor measuring water flow mud-sand content.
Background technology
At present, the silt sensor utilizing infrared ray reflection strength in variable concentrations silt carrying flow this principle different to carry out sediment concentration measuring has infrared sand-measuring meter and the reflective sand-carrying capacity measuring method of one and device.Wherein, infrared sand-measuring meter adopts common infrared light supply and photodetector to carry out the measurement of sediment charge, but sensor optical path design is too simple, and structure is reasonable not, causes sediment concentration measuring scope lower than 50kg/m
3, the measurement of inapplicable high sediment concentration current, practicality is not high.In addition, the near-infrared light source (1800nm and 1940nm) that reflective sand-carrying capacity measuring method and device adopt and photodetector carry out the measurement of sediment charge, because 1800nm and 1940nm infrared light supply has stronger moisture absorption and reflection characteristic, sediment concentration measuring scope reaches 300kg/m
3but infrared light supply and photodetector are placed in the measurement carrying out sediment charge in same confined space by the design of its sensor construction, the superposition interference that the mirror-reflection not getting rid of glass sheet produces, and 1800nm and 1940nm infrared light supply and detector unit price are the decades of times even hundreds of times of domestic common infrared light supply and photodetector, and production application is with high costs.
So existing silt sensor is that infrared light supply and photodetector are placed in the measurement carrying out sediment charge in the same space.Enter in silt carrying flow through glass sheet after the infrared ray part refraction that infrared light supply produces, again photodetector is entered through glass sheet by the reflection of sand grain, produce effective photosignal, and another part infrared ray directly enters photodetector after glass sheet surface generation mirror-reflection, so just invalid superposition interference is created to measurement result.
Summary of the invention
The object of the invention is the problem in order to solve the infrared silt sensor cost intensive measuring sediment charge at present, a kind of reflective infrared silt sensor measuring water flow mud-sand content is provided.
A kind of reflective infrared silt sensor measuring water flow mud-sand content of the present invention,
Described sensor comprises treatment circuit, photodetector, shading sleeve, infrared light supply and cloche;
Described photodetector, shading sleeve and infrared light supply are all arranged in cloche, and described shading sleeve is enclosed within the outside surface of photodetector,
Described infrared light supply, for launching infrared light through cloche in the current of sediment charge to be measured;
Described photodetector, for the infrared light through silt reflection and scattering in cloche detection current;
Described treatment circuit, obtains the simulating signal of sediment charge according to the infrared light intensity of photodetector detection.
The lower end of described shading sleeve and the seamless link of cloche base plane.
The detection direction angular range of described infrared light supply transmitting illuminant direction and photodetector is 35 ° ~ 55 °.
Described sensor comprises multiple infrared light supply, and described multiple infrared light supply is distributed in around it centered by described photodetector.
Described infrared light supply is infrarede emitting diode, and its peak wavelength scope is 940nm ~ 950nm;
Described photodetector is infrared receiving diode, and its sensitive wave length scope is 800nm ~ 1100nm.
Described treatment circuit forms circuit board, and infrared light supply and photodetector are weldingly fixed on described circuit board by welding pin.
Described sensor also comprises guard shield 7;
Described circuit board, photodetector, shading sleeve, infrared light supply and cloche are all arranged in guard shield.
The afterbody of described guard shield is provided with internal thread, and described internal thread is used for being tightly connected with cable water joint.
Fluid sealant is adopted to carry out waterproof sealing between described guard shield and cloche.
Beneficial effect of the present invention is, due to infrared light supply and photodetector are carried out space isolation by shading sleeve, make infrared light supply be blocked cover at the mirror-reflection infrared light that cloche surface produces to stop, enter photodetector whole are infrared lights of silt reflection and scattering, thus avoid mirror-reflection the superposition of silt measurement result is disturbed, improve measurement range and precision.Meanwhile, the lower-cost infrarede emitting diode that adopts of infrared light supply of the present invention and photodetector and infrared receiving diode just can realize.The present invention can effectively avoid the superposition of mirror-reflection to disturb compared with the reflective infrared silt sensor not adding shading sleeve, and sediment concentration measuring scope significantly improves.Experimental verification, lower-cost sediment concentration measuring scope of the present invention also can reach 300kg/m
3above.
Accompanying drawing explanation
Fig. 1 is a kind of principle schematic measuring the reflective infrared silt sensor of water flow mud-sand content of the present invention.
Embodiment
Composition graphs 1 illustrates present embodiment, a kind of reflective infrared silt sensor measuring water flow mud-sand content described in present embodiment,
Described sensor comprises treatment circuit 1, photodetector 2, shading sleeve 3, multiple infrared light supply 5, cloche 6 and guard shield 7;
Described shading sleeve 3 is enclosed within the outside surface of photodetector 2, and described treatment circuit 1 makes circuit board, is weldingly fixed on described circuit board by infrared light supply 5 and photodetector 2 by welding pin 4; Described multiple infrared light supply 5 is distributed in around it centered by described photodetector 2; The detection direction angle of adjustment infrared light supply 5 transmitting illuminant direction and photodetector 2, angular range is 35 ° ~ 55 °; Cloche 6 put into downwards by the circuit board welded, infrared light supply 5 and photodetector 2, circuit board is located at the top of cloche 6, shading sleeve 3 lower end and the seamless link of cloche 6 base plane, finally all embed circuit board, photodetector 2, shading sleeve 3, infrared light supply 5 and cloche 6 in guard shield 7.
Described infrared light supply 5, for launching infrared light through cloche 6 in the current of sediment charge to be measured;
Described photodetector 2, for detecting the infrared light of silt reflection and scattering in current through cloche 6;
Described treatment circuit 1, according to the simulating signal of the infrared light intensity acquisition sediment charge that photodetector 2 detects;
After infrared light supply 5 and photodetector 2 carry out space isolation by shading sleeve 3, infrared light supply 5 is blocked cover 3 at the mirror-reflection that cloche 6 surface produces to be stopped, photodetector 2 cannot be entered, superposition interference can not be produced to measurement result, reach the object improving measurement range and precision.
Present embodiment have employed the infrarede emitting diode of common low cost as infrared light supply 5, its peak wavelength scope is 940nm ~ 950nm, common infrared receiving diode is as photodetector 2, its sensitive wave length scope is 800nm ~ 1100nm, the inner structure of sensor is improved, silt sensor not only good economy performance after improving simultaneously, and the superposition interference that mirror-reflection can be avoided to produce, substantially increase the measurement range of sediment charge, reach 300kg/m
3above.
In present embodiment, the afterbody of described guard shield 7 is provided with internal thread, and described internal thread is used for being tightly connected with cable water joint.
In present embodiment, between described guard shield 7 and cloche 6, fluid sealant is adopted to carry out waterproof sealing.
The sensor of present embodiment can be widely used in the field such as research soil and water conservation and soil loss monitoring.
Claims (9)
1. measure the reflective infrared silt sensor of water flow mud-sand content for one kind, it is characterized in that, described sensor comprises treatment circuit (1), photodetector (2), shading sleeve (3), infrared light supply (5) and cloche (6);
Described photodetector (2), shading sleeve (3) and infrared light supply (5) are all arranged in cloche (6), and described shading sleeve (3) is enclosed within the outside surface of photodetector (2),
Described infrared light supply (5), for launching infrared light through cloche (6) in the current of sediment charge to be measured;
Described photodetector (2), for the infrared light through silt reflection and scattering in cloche (6) detection current;
Described treatment circuit (1), according to the simulating signal of the infrared light intensity acquisition sediment charge that photodetector (2) detects.
2. a kind of reflective infrared silt sensor measuring water flow mud-sand content according to claim 1, is characterized in that, the lower end of described shading sleeve (3) and cloche (6) base plane seamless link.
3. a kind of reflective infrared silt sensor measuring water flow mud-sand content according to claim 1 and 2, is characterized in that,
The detection direction angular range of described infrared light supply (5) transmitting illuminant direction and photodetector (2) is 35 ° ~ 55 °.
4. a kind of reflective infrared silt sensor measuring water flow mud-sand content according to claim 3, it is characterized in that, described sensor comprises multiple infrared light supply (5), and described multiple infrared light supply (5) is distributed in around it centered by described photodetector (2).
5. a kind of reflective infrared silt sensor measuring water flow mud-sand content according to claim 4, it is characterized in that, described infrared light supply (5) is infrarede emitting diode, and its peak wavelength scope is 940nm ~ 950nm;
Described photodetector (2) is infrared receiving diode, and its sensitive wave length scope is 800nm ~ 1100nm.
6. a kind of reflective infrared silt sensor measuring water flow mud-sand content according to claim 5, it is characterized in that, described treatment circuit (1) forms circuit board, and infrared light supply (5) and photodetector (2) are weldingly fixed on described circuit board 1 by welding pin 4.
7. a kind of reflective infrared silt sensor measuring water flow mud-sand content according to claim 6, it is characterized in that, described sensor also comprises guard shield (7);
Described circuit board, photodetector (2), shading sleeve (3), infrared light supply (5) and cloche (6) are all arranged in guard shield (7).
8. a kind of reflective infrared silt sensor measuring water flow mud-sand content according to claim 7, it is characterized in that, the afterbody of described guard shield (7) is provided with internal thread, and described internal thread is used for being tightly connected with cable water joint.
9. a kind of reflective infrared silt sensor measuring water flow mud-sand content according to claim 7, is characterized in that, adopt fluid sealant to carry out waterproof sealing between described guard shield (7) and cloche (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410796105.2A CN104406938A (en) | 2014-12-18 | 2014-12-18 | Reflective infrared sediment sensor for measuring content of sediment in water flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410796105.2A CN104406938A (en) | 2014-12-18 | 2014-12-18 | Reflective infrared sediment sensor for measuring content of sediment in water flow |
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| CN104406938A true CN104406938A (en) | 2015-03-11 |
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| CN201410796105.2A Pending CN104406938A (en) | 2014-12-18 | 2014-12-18 | Reflective infrared sediment sensor for measuring content of sediment in water flow |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823758A (en) * | 2016-05-27 | 2016-08-03 | 黑龙江省水土保持科学研究院 | Backward scattering type infrared silt measurement sensor |
| CN108020646A (en) * | 2018-02-05 | 2018-05-11 | 中央民族大学 | In site measurement sea-sediment interface position and the device and method of mechanical characteristic |
| CN109212151A (en) * | 2018-09-30 | 2019-01-15 | 杨运 | A kind of sediment content detector guard |
| CN109917409A (en) * | 2019-04-09 | 2019-06-21 | 深圳市道通智能航空技术有限公司 | A kind of distance detector and aircraft |
| CN110108659A (en) * | 2019-05-28 | 2019-08-09 | 杭州电子科技大学 | One kind being based on near-infrared reflection formula soil humidity measuring device and its detection method |
| CN111966143A (en) * | 2020-08-28 | 2020-11-20 | 界首市南都华宇电源有限公司 | Storage battery electrode plate heating curing steam control device |
-
2014
- 2014-12-18 CN CN201410796105.2A patent/CN104406938A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823758A (en) * | 2016-05-27 | 2016-08-03 | 黑龙江省水土保持科学研究院 | Backward scattering type infrared silt measurement sensor |
| CN105823758B (en) * | 2016-05-27 | 2019-05-03 | 黑龙江省水利科学研究院 | The infrared silt measurement sensor of Back |
| CN108020646A (en) * | 2018-02-05 | 2018-05-11 | 中央民族大学 | In site measurement sea-sediment interface position and the device and method of mechanical characteristic |
| CN109212151A (en) * | 2018-09-30 | 2019-01-15 | 杨运 | A kind of sediment content detector guard |
| CN109917409A (en) * | 2019-04-09 | 2019-06-21 | 深圳市道通智能航空技术有限公司 | A kind of distance detector and aircraft |
| CN110108659A (en) * | 2019-05-28 | 2019-08-09 | 杭州电子科技大学 | One kind being based on near-infrared reflection formula soil humidity measuring device and its detection method |
| CN111966143A (en) * | 2020-08-28 | 2020-11-20 | 界首市南都华宇电源有限公司 | Storage battery electrode plate heating curing steam control device |
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Application publication date: 20150311 |