CN208091899U - A kind of optical fibre light splitting measuring system - Google Patents
A kind of optical fibre light splitting measuring system Download PDFInfo
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- CN208091899U CN208091899U CN201820182044.4U CN201820182044U CN208091899U CN 208091899 U CN208091899 U CN 208091899U CN 201820182044 U CN201820182044 U CN 201820182044U CN 208091899 U CN208091899 U CN 208091899U
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Abstract
A kind of optical fibre light splitting measuring system of the utility model offer is related to water quality detection instrument, including light source (1), chopper disk (2), optical filter (3), installation optical filter (3) filter disc (4), optical fiber (5) and light splitting fiber bench (6)；The wavelength that detection needs is conducted to sense channel by the medium of optical fiber, to substitute existing LED lighting direct irradiation cuvette technology, it is acquired by light source, light beam is irradiated on chopper disk, light source is converged on optical filter by the adjusting of the optical wavelength power of chopper disk, again by fiber optic conduction to sense channel, complete that light source luminescent, adjusting, optical filtering, optically focused, light splitting, optically focused realizes the detection of multichannel again, to form a kind of simple in structure, light stability, multi-wavelength and the analytical instrument of water quality that detection efficiency can be improved.
Description
Technical field
The utility model is related to a kind of optical fibre light splitting measuring systems, are especially applied to Water Test Kits and water quality testing meter
Optical fibre light splitting measuring system.
Background technology
The scheme term LED lighting direct irradiation cuvette method of existing field of water quality detection detection, including it is following several
Kind：
The first scheme is used the LED light of different wave length to coordinate optical filter, is obtained monochromatic light using relatively broad, single
Coloured light by a condenser lens (part detecting instrument does not use lens), passes through sample cell, then arrive photodiode, receives again
Light intensity signal.Due to the limitation of its internal structure, light source can only be detected a cuvette in actually measuring, when detection
Between on it is longer, and LED and optical filter assemble very complicated in assembling process, and in addition LED LED sources are due to existing
There is technical reason limitation, bandwidth and the accuracy of wavelength differ greatly on wavelength and intensity of illumination, therefore existing using the party
There are large errors in the accuracy and consistency of testing result for the water quality analyzer of case.
Scheme is second is that the LED light of multiple and different wavelength is done on a circuit board, while polishing is to colorimetric pool, then arrives light
Electric diode receives signal.Need which wavelength used, lights the LED light of corresponding wavelength.Instrument can frequency in measurement process
Numerous either on or off LED light, such LED light cannot reach the stable state after preheating.In addition, needing frequently to open in measurement process
Instrument sample pond is put into blank sample and waits for test sample, and operation of uncapping each time can all influence sample cell temperature, and introduce veiling glare, right
The stabilization of Instrument measuring numerical value has an impact.When measuring more water sample, primary blank sample is put, follow-up continuous multiple water samples all above one
Secondary blank sample is reference, and during measured value, voltage fluctuation, electromagnetic interference, temperature change all changed the state of circuit.
This moment, then with the blank sample of Last status it makes reference, error will become apparent from.The LED light of several different wave lengths is mounted in simultaneously
As light source on the same circuit board, the light sent out is difficult to keep placed in the middle when photocell receives, and such light can be inclined, from
And not exclusively influence measured value since photocell receives.
The third scheme is that complex light or Single wavelength LED light, illumination is used to be mapped to sample cell, then arrive optical filter again.
It is filtered by optical filter and monochromatic light is got to photocell.Third scheme equally exists the defects of scheme one and two.And it uses
Using thermal light sources such as light bulbs due to direct irradiation in the scheme of complex light, light source will produce larger heat, to receiving terminal and inspection
It surveys water sample and will appear larger fluctuation, especially total nitrogen, the wiring board of the projects such as COD can acquire numerical value meeting because of the influence of higher temperature
Generate larger variation.
In short, there are the following problems for the optical fibre light splitting measuring system of the prior art：
1, the fixed problem of flashing obtains dark current in instrument and when coloured light intensity, is unable to get stable light letter
Number, optical fibre light splitting system cannot keep the stability and consistency of light-source system；
2, monochromatic optical transmission process can not avoid the entrance of stray light；
3, single colorimetric pool efficiency is low, can not carry out multi-channel detection and the multiple water sample samples of one-time detection；
4, in measurement process, it is repeatedly opened colorimetric pool, to amplifying circuit in instrument, light path etc. causes extreme influence, simultaneously
When having multiple samples in measurement process, circuit state variation can caused measured value deviation；
5, photocell receiving portion does not have optical device, causes to receive incomplete；
6, the LED lighting measuring system in existing Water Test Kits and thermal light source direct irradiation sense channel, are being detected
End generates heat, and flashing is fixed, and the temperature of test side is excessively high.
The research hotspot that water quality sensing detection is always field of water quality detection is carried out using optical fiber, is examined in water quality according to optical fiber
Optical fiber water quality sensor can be divided into functional form nand function type two and come greatly by the effect difference played in survey, wherein functional fiber
Water quality sensor directly uses optical fibers as sensing unit and is measured to tested water quality, also referred to as sensing type optical fiber water quality detection
Sensor；Optical fiber only plays biography light action in non-functional type optical fiber water quality sensor, can not be as the sensitivity of water quality detection
Unit, but water quality monitoring is carried out using other non-optical fiber sensing units, therefore also referred to as the water quality detection of light transmission type optical fiber passes
Sensor.
Invention content
In order to overcome the above problem of the existing technology, the utility model to provide a kind of optical fibre light splitting measuring system, this
The basic thought that utility model solves the technical solution of its technical problem use is：Optical fibre light splitting measuring system is related to water quality inspection
Instrument is surveyed, is conducted the wavelength that detection needs to sense channel by the medium of optical fiber, to the mechanical mechanism in optical device
New breakthrough design is carried out, to substitute existing LED lighting direct irradiation cuvette technology, whole design idea is to pass through
Light source acquires, and light beam is irradiated on chopper disk, light source is converged to optical filter by the adjusting of the optical wavelength power of chopper disk
On, then light source luminescent, adjusting, optical filtering, optically focused, light splitting, optically focused is more to realize again by fiber optic conduction to sense channel, completing
The detection in channel, to form a kind of simple in structure, light stability, multi-wavelength and the water analysis that detection efficiency can be improved
Instrument.
The purpose of this utility model is to provide a kind of optical fibre light splitting measuring systems, including light source (1), chopper disk (2), filter
Mating plate (3), installation optical filter (3) filter disc (4), optical fiber (5) and light splitting fiber bench (6).
Preferably, the light source (1) using 12v20w halogen tungsten lamps, deuterium lamp, light emitting diode or other illuminate formula light source when,
Add and use focused lamp cover, enables in the light cover that the light source is sent out to the sheet glass of the chopper disk；The light source (1)
For centralized light source or direct light source, then focused lamp cover is not used.
Preferably, the chopper disk (2) uses the insulating glass plate and blue light glass of diameter 15mm to 30mm, to the light
The light that source (1) is sent out plays the role of heat-insulated and decaying light intensity；And work as the light intensity for the light that the light source (1) is sent out not
When can meet detection demand, chopper disk (2) is removed to realize the enhancing of light source.
Preferably, the filter disc (4) uses round disk, and a piece of optical filter (3), institute are installed every certain angle
The optical filter (3) that optical filter (3) uses 10mm or 12mm outer diameters is stated, to install multiple optical filters (3), and the filter disc
(4) optical filter (3) installation number in can change to adjust the wavelength for measuring and needing.
Preferably, the optical fibre light splitting system further includes stepper motor (8), the stepper motor and the filter disc (4)
Connection realizes the detection of multi-wavelength by (4) 360 degree of rotations of the filter disc come Wavelength-converting.
Preferably, the optical fibre light splitting measuring system is mounted directly light emitting diode to substitute light in optical filter (3) leading portion
Source (1).
Preferably, the optical fibre light splitting measuring system further includes light source chamber (9), has metal on the outside of the light source chamber (9)
Hood (7) is protected from light light source (1), and the light source chamber (9) forms darkroom under the masking of the metal light shields (7),
Stop the entrance of external stray light, and prevents the stray light of the light source (1) part from entering the optical fiber (5).
Preferably, the optical fiber (5) uses the glass optical fiber or silica fibre of diameter of phi 1- Φ 5, for what is carried out to light
Conduction, light splitting, the optical fiber (5) are customized to 1 point of 2-12 root, i.e. an entering light separates more light beams, often separates a light beam i.e.
A sense channel can be formed.
Preferably, the fiber bench (6) is set in the optical fiber (5) front section, the fiber bench (6) is mounted on optical fiber
(5) light input part and the optical fiber (5) is fixed in light-splitting chamber, is used for pair in the internal mounted lens piece of the fiber bench (6)
The light source of acquisition carries out optically focused, so that the chopper disk (2) is conducted through the light source come and concentrates the part for being transmitted to the optical fiber (5),
By the optical fiber (5) so that a light beam of the light source (1) is divided into more light beams, formed in optical fiber (5) light-emitting window a plurality of
Stabilized light source.
Preferably, the fiber bench (6) separates optical fiber (5) and cuvette testing stand (10) coupling part, light for fixation
The light beam that fine (5) export comes carries out optically focused by the internal lens on light Shu Zaici of the fiber bench (6), lens diameter and
Focal point is formed at outer diameter 10mm to 50mm and receives light beam, is calculated the numerical value such as transmitance and absorbance and is obtained the concentration of determinand
Value.
The optical fibre light splitting measuring system of the utility model still belongs to pioneering at home and in the world, compared with prior art, behaviour
Simpler on work, light source stability higher is so that detection result is more accurate.Extinction between rower testing result single channel at present
Angle value measurement error is ± 10 ‰, and after being detected by optical fibre light splitting measuring system, interchannel error can precisely arrive ± 3 ‰, single-pass
Error can reach ± 1 ‰ between road.Breach the existing required precision in water quality detection instrument field.And since the use of multichannel carries
The efficiency for having risen instrument in industry, by taking the water quality detection instrument in 4 channels as an example, an instrument is equivalent to currently on the market 4
The workload of platform instrument.Also have compared with other water quality detection equipment significantly in the saving etc. of energy consumption, raw material, process
Effect.It will be far ahead of other brands of the same trade on detection efficiency and accuracy.The optical fibre light splitting measures system at present
System is mainly used for multi-parameter water quality detector, COD fast detectors, ammonia nitrogen fast detector, total phosphorus fast detector, total nitrogen inspection
Survey instrument, the two-parameter detector of COD ammonia nitrogens, four parameter detecting instrument of COD ammonia nitrogen total phosphorus turbidity metal, water quality determining heavy metals instrument and
Water quality pollutant analyzer.
Description of the drawings
Attached drawing 1 is the optical fibre light splitting measuring system structural schematic diagram according to the utility model embodiment；
Attached drawing 2 is 6 light path schematic diagram of optical fibre light splitting measuring system optical fiber according to the embodiment of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings, but is not intended to limit the present invention's
Protection domain.
Referring to attached drawing 1, a kind of structural schematic diagram of optical fibre light splitting measuring system, including light source 1, chopper disk 2, optical filter 3,
Optical filter filter disc 4, optical fiber 5, light splitting fiber bench 6 and metal light shields 7 and stepper motor 8 are installed.1 generally use of light source
12v20w halogen tungsten lamps, deuterium lamp, light emitting diode or other light sources, and add and use focused lamp cover, so that the light that light source 1 is sent out is collected
In be irradiated on the sheet glass of chopper disk.Certainly, centralized light source or direct light source can also be used in the embodiment, at this time not
It needs to reuse focused lamp cover.Chopper disk 2 sends out lamp source using the insulating glass plate and blue light glass of diameter 15mm to 30mm
The light source 1 gone out plays the role of the heat-insulated and decaying intensity of light source.If 1 intensity of light source cannot meet detection need in the present embodiment
It asks, removal chopper disk 2 can be used to realize the enhancing of light source 1.Filter disc 4 uses round disk, and one is installed every certain angle
Tablet filter 3 can install 1 to 10 tablet filter 3 using the optical filter 3 of 10mm or 12mm outer diameters.It can also be filtered by increasing
3 installation number of optical filter in disk 4 adjusts the wavelength of needs.Realize that 360 degree turn by the connection of stepper motor 8 and filter disc
It moves and carrys out Wavelength-converting, realize the detection of multi-wavelength, 1 part of light source of removal front can also be used, it is direct in 3 leading portion of optical filter
Light emitting diode is installed to acquire light source 1.Optical fibre light splitting measuring system further includes light source chamber 9, has gold on the outside of the light source chamber
Belong to hood 7 to be protected from light light source, light source chamber 9 forms darkroom under the masking of metal light shields 7, stops external stray light
Into, and prevent the stray light of 1 part of light source from entering the optical fiber
The fiber section is the emphasis of total, and the principle of fiber optic conduction is simply said, the complete name of optical fiber
Optical fiber is done, filament is pulled into special technique with glass or pure quartz, diameter is also thinner than hairline.Light beam is in glass
Transmission, signal are not interfered by electromagnetism in fiber, and transmission is stablized.With dependable performance, quality is high, and speed is fast, line loss is low,
The features such as long transmission distance.Optical fiber 5 is realized using the glass optical fiber or silica fibre of diameter of phi 1- Φ 5 to light in such a system
Conduction, the light splitting of progress.Optical fiber may customize 1 point of 2-12 root, i.e. an entering light separates more light beams.Often separate a light beam
Form a sense channel.Fiber bench 6 is set in 5 front section of optical fiber, fiber bench 6 is mounted on 5 light input part of optical fiber and by light
Fibre 5 is fixed in light-splitting chamber, is used for carrying out optically focused to the light source 1 of acquisition in 6 inside mounted lens piece of fiber bench, is made chopper disk 2
It is conducted through the light source come and concentrates the part for being transmitted to optical fiber 5, by optical fiber 5 so that a light beam of light source 1 is divided into more light beams,
A plurality of stabilized light source is formed in 5 light-emitting window of optical fiber.Fiber bench 6 separates optical fiber 5 and cuvette testing stand coupling part for fixation,
The light beam that the export of optical fiber 5 comes carries out optically focused by the lens on light Shu Zaici inside fiber bench 6, in the diameter and outer diameter of lens
Focal point is formed at 10mm to 50mm and receives light beam, is calculated the numerical value such as transmitance and absorbance and is obtained the concentration value of determinand.
Attached drawing 2 indicates the general assembly drawing of 6 light path of embodiment optical fiber, specific to tie since part of devices uses packing forms
Structure is needed referring to attached drawing 1, wherein 11 indicate the master control borad of the optic fibre light path.
The optical fibre light splitting measuring system still belongs to pioneering at home and in the world at present, compared with prior art, operationally
Simpler, light source stability so that detection result is more accurate.Absorbance value measurement error between rower testing result single channel at present
± 10 ‰, after being detected by optical fibre light splitting measuring system, interchannel error can precisely arrive ± 3 ‰, and error is reachable between single channel
To ± 1 ‰.Breach the existing required precision in water quality detection instrument field.And since the use of multichannel improves instrument in industry
The efficiency of device, by taking the water quality detection instrument in 4 channels as an example, an instrument is equivalent to the work of 4 instruments currently on the market
Amount.Also there is significant effect compared with other water quality detection equipment in the saving etc. of energy consumption, raw material, process.It is examining
Surveying in efficiency and accuracy will be far ahead of other brand of the same trade.The system is used primarily in my company's multi-parameter water at present
The double ginsengs of quality detection instrument, COD fast detectors, ammonia nitrogen fast detector, total phosphorus fast detector, total nitrogen detector, COD ammonia nitrogens
Number detector, four parameter detecting instrument of COD ammonia nitrogen total phosphorus turbidity metal, water quality determining heavy metals instrument, water quality pollutant analyzer.
The technical solution provided above the utility model embodiment is described in detail, used herein specifically
A example is expounded the principle and embodiment of the utility model embodiment, and the explanation of above example is only applicable to help
Assistant solves the principle of the embodiment of the present invention；Those of ordinary skill in the art, embodiment according to the present utility model are having simultaneously
There will be changes in body embodiment and application range, in conclusion the content of the present specification should not be construed as to this hair
Bright limitation.
Claims (10)
1. a kind of optical fibre light splitting measuring system, it is characterised in that：Including light source（1）, chopper disk（2）, optical filter（3）, installation filter
Mating plate（3）Use filter disc（4）, optical fiber（5）And light splitting fiber bench（6）, the light source（1）The light sent out passes through the chopper disk
（2）, by the chopper disk（2）Light projection to the filter disc（4）On, the optical filter（3）Mounted on the filter disc
（4）Inside, by the filter disc（4）Light projection to the light splitting fiber bench（6）, the optical fiber（5）With the light splitting light
Fine seat（6）Connection.
2. a kind of optical fibre light splitting measuring system according to claim 1, it is characterised in that：The light source（1）Using
When 12v20w halogen tungsten lamps, deuterium lamp, light emitting diode, adds with focused lamp cover, the light cover that the light source is sent out is enable to arrive
On the sheet glass of the chopper disk；The light source（1）For centralized light source or direct light source, then focused lamp cover is not used.
3. a kind of optical fibre light splitting measuring system according to claim 1, it is characterised in that：The chopper disk（2）Using straight
The insulating glass plate and blue light glass of diameter 15mm to 30mm, to the light source（1）The light sent out plays heat-insulated and decaying light intensity
Effect；And work as the light source（1）When the light intensity of the light sent out cannot meet detection demand, chopper disk is removed（2）Come real
The enhancing of existing light source.
4. a kind of optical fibre light splitting measuring system according to claim 1, it is characterised in that：The filter disc（4）Using circle
Shape disk installs a piece of optical filter every certain angle（3）, the optical filter（3）Using the filter of 10mm or 12mm outer diameters
Mating plate（3）, to install multiple optical filters（3）, and the filter disc（4）In optical filter（3）Installation number can change
The wavelength needed is measured with adjustment.
5. a kind of optical fibre light splitting measuring system according to claim 1, it is characterised in that：The optical fibre light splitting measuring system
It further include stepper motor（8）, the stepper motor and the filter disc（4）Connection, passes through the filter disc（4）360 degree of rotations
Carry out Wavelength-converting, realizes the detection of multi-wavelength.
6. a kind of optical fibre light splitting measuring system according to claim 1, it is characterised in that：The optical fibre light splitting measuring system
In optical filter（3）Leading portion is mounted directly light emitting diode with alternative source of light（1）.
7. a kind of optical fibre light splitting measuring system according to claim 1, it is characterised in that：The optical fibre light splitting measuring system
It further include light source chamber（9）, the light source chamber（9）Outside has metal light shields（7）To light source（1）It is protected from light, in the gold
Belong to hood（7）Masking under the light source chamber（9）Darkroom is formed, stops the entrance of external stray light, and prevent the light
Source（1）Partial stray light enters the optical fiber（5）.
8. a kind of optical fibre light splitting measuring system according to claim 7, it is characterised in that：The optical fiber（5）Using diameter
The glass optical fiber or silica fibre of Φ 1- Φ 5, conduction, light splitting for being carried out to light, the optical fiber（5）It is customized to 1 point of 2-12
Root, i.e. an entering light separate more light beams, and a sense channel can be formed by often separating a light beam.
9. a kind of optical fibre light splitting measuring system according to claim 8, it is characterised in that：In the optical fiber（5）Leading portion portion
Set up separately and sets the fiber bench（6）, the fiber bench（6）Mounted on optical fiber（5）Light input part and by the optical fiber（5）It is fixed on point
In light room, in the fiber bench（6）Internal mounted lens piece is used for carrying out optically focused to the light source of acquisition, makes the chopper disk（2）
It is conducted through the light source concentration come and is transmitted to the optical fiber（5）Part, pass through the optical fiber（5）Make the light source（1）One
Root light beam is divided into more light beams, in optical fiber（5）Light-emitting window forms a plurality of stabilized light source.
10. according to a kind of any optical fibre light splitting measuring systems of claim 7-9, it is characterised in that：The fiber bench（6）
Optical fiber is separated for fixation（5）With cuvette testing stand（10）Coupling part, optical fiber（5）The light beam that export comes passes through the optical fiber
Seat（6）Internal lens on light Shu Zaici carries out optically focused, and forming focal point at the diameter and outer diameter 10mm to 50mm of lens connects
Light beam is received, the numerical value such as transmitance and absorbance is calculated and obtains the concentration value of determinand.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820182044.4U CN208091899U (en) | 2018-02-02 | 2018-02-02 | A kind of optical fibre light splitting measuring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820182044.4U CN208091899U (en) | 2018-02-02 | 2018-02-02 | A kind of optical fibre light splitting measuring system |
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| CN208091899U true CN208091899U (en) | 2018-11-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095418A (en) * | 2019-04-08 | 2019-08-06 | 北京时代新维测控设备有限公司 | A kind of photoelectric colorimetry measuring device |
-
2018
- 2018-02-02 CN CN201820182044.4U patent/CN208091899U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095418A (en) * | 2019-04-08 | 2019-08-06 | 北京时代新维测控设备有限公司 | A kind of photoelectric colorimetry measuring device |
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