CN204302181U - A kind of water salinity checkout gear - Google Patents
A kind of water salinity checkout gear Download PDFInfo
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- CN204302181U CN204302181U CN201420852431.6U CN201420852431U CN204302181U CN 204302181 U CN204302181 U CN 204302181U CN 201420852431 U CN201420852431 U CN 201420852431U CN 204302181 U CN204302181 U CN 204302181U
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Abstract
The utility model provides a kind of water salinity checkout gear, and described device comprises reflection probe, light source, photoelectric detector, signal conditioning circuit and signal processing and analysis circuit; Described reflection probe comprises vacuum insulation chamber, the first optical fiber and the second optical fiber; Described first optical fiber is connected with described light source, and described second optical fiber is connected with described photoelectric detector; Described vacuum insulation chamber is between the neat section and fluid to be measured of the first optical fiber, the second optical fiber; Described photoelectric detector is connected with described signal conditioning circuit; Described signal processing and analysis circuit is connected with described signal conditioning circuit.Device of the present utility model solves in conventional detection, complicated operation, inaccurate, can not the shortcoming such as on-line checkingi for a long time, realize the automatic measurement of water salinity, precision is high, speed is fast, can on-line checkingi for a long time.
Description
Technical field
The utility model relates to water quality inspection technique field, more specifically relates to a kind of water salinity checkout gear.
Background technology
Salinity is one of important indicator in water quality detection because closely related with the osmotic pressure of cell tissue, therefore in aquaculture, detect water salinity healthy to aquatic products, breed and output all significant.The common detection methods of salinity comprises chemical method (silver nitrate titration method) and physical method, and physical method comprises again hydrometer method, conductance method and refraction process.Chemical method complicated operation, time are long, are not suitable for Quick Measurement.In physical method, there is complicated operation, shortcoming that error is larger in hydrometer method equally.Conductance method salinometer is divided into again electric pole type and induction type two kinds of methods, electric pole type is measured accurately, but measurement electrode directly contacts tested water body, very easily be corroded, pollute, affect performance, induction type take electromagnetic induction as principle, but needs sample size larger, and need temperature-compensating, limit the application of this kind of sensor.It is utilize the refractive index of the water body of different salinity difference to carry out measuring that refraction process surveys salinity, the refraction process of comparative maturity utilizes light to pass fluid to be measured, according to the difference of refractive index, observe light from opposite side and drop on what graduation position, thus obtain salinity, the method precision is not high, and complicated operation is not suitable for On-line rapid measurement.
Utility model content
(1) technical problem that will solve
The technical problems to be solved in the utility model, under the prerequisite ensureing the accuracy that water salinity detects, reduces the complexity of measurement mechanism, and realizes on-line measurement.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of water salinity checkout gear, and described device comprises reflection probe, light source, photoelectric detector, signal conditioning circuit and signal processing and analysis circuit; Described reflection probe comprises vacuum insulation chamber, the first optical fiber and the second optical fiber;
Described first optical fiber is connected with described light source, and described second optical fiber is connected with described photoelectric detector; Described vacuum insulation chamber is between the neat section and fluid to be measured of the first optical fiber, the second optical fiber; ; Described photoelectric detector is connected with described signal conditioning circuit; Described signal processing and analysis circuit is connected with described signal conditioning circuit.
Preferably, described first optical fiber is parallel placed side by side with the second optical fiber, and the exit end of described first optical fiber is concordant with the incidence end of described second optical fiber, and equal to the distance of water body liquid level to be measured.
Preferably, the upper bottom surface in described vacuum insulation chamber is connected with the incidence end of the exit end of described first optical fiber and described second optical fiber, and the lower surface of described vacuum chamber directly contacts with water body to be measured.
Preferably, the upper surface of described vacuum chamber and lower surface are high glass thoroughly.
Preferably, described light source is LED light source or laser diode, and the light that described light source is launched enters described first optical fiber through Lens Coupling.
Preferably, described device also comprises light source driving circuit, and it is in being connected with light source, is constant-current source DC driven to the type of drive of described light source, or exchanges driving; Described interchange type of drive is sine wave drive, square wave drives, triangular wave drives or wherein arbitrarily the superposition of two or more signals or modulation use.
Preferably, described signal conditioning circuit, according to the difference of described light source driving circuit type of drive, adopts different forms, is specially:
Described light source driving circuit is constant-current source DC driven, and described signal conditioning circuit comprises the stream pressure converting unit, signal amplification unit and the low-pass filter unit that connect successively;
Described light source driving circuit drives for exchanging, and described signal conditioning circuit comprises and connects stream pressure converting unit, signal amplification unit, bandpass filtering unit, lock-in amplify unit and low-pass filter unit successively.
Preferably, described signal processing and analysis circuit gathers the signal after described signal conditioning circuit conditioning, and obtains corresponding water salinity value.
Preferably, described signal processing and analysis circuit also comprises digital temperature chip, carries out temperature-compensating to the measurement of water salinity.
Preferably, described first optical fiber is single core glass optical fiber, multicore glass optical fiber, single core plastic optical fiber or multicore plastic optical fiber;
Described second optical fiber is single core glass optical fiber, multicore glass optical fiber, single core plastic optical fiber or multicore plastic optical fiber;
Described photoelectric detector is photodiode or avalanche diode.
(3) beneficial effect
The utility model provides a kind of water salinity checkout gear, device of the present utility model solves in conventional detection, complicated operation, inaccurate, can not the shortcoming such as on-line checkingi for a long time, realize the automatic measurement of water salinity, precision is high, speed is fast, can on-line checkingi for a long time; Device built-in temperature chip of the present utility model simultaneously, carrying out temperature-compensating, is that measurement data is more accurate.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of water salinity checkout gear of the present utility model;
Fig. 2 is the structural representation of reflection probe in the utility model.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.Following examples for illustration of the utility model, but can not be used for limiting scope of the present utility model.
In description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more; Term " on ", D score, "left", "right", " interior ", " outward ", " front end ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
The utility model discloses a kind of water salinity checkout gear, described device comprises reflection probe 1, light source 4, photoelectric detector 5, signal conditioning circuit 7 and signal processing and analysis circuit 8; Described reflection probe 1 comprises vacuum insulation chamber 12, first optical fiber 10 and the second optical fiber 11;
Described first optical fiber 10 is connected with described light source 4, and the laser that described light source 4 is launched is injected water body to be measured; Described second optical fiber 11 is connected with described photoelectric detector 5, collects the optical signal of described light source 4 virtual image in water body, and is transferred to described photoelectric detector 5; Described vacuum insulation chamber is between the neat section and fluid to be measured of the first optical fiber, the second optical fiber; Described photoelectric detector 5 is connected with described signal conditioning circuit 7, described photoelectric detector 5 is transferred to described signal conditioning circuit 7 after the optical signal of reception is converted to the signal of telecommunication, the signal gathered for being applicable to AD is nursed one's health through described signal conditioning circuit 7, then be transferred to described signal processing and analysis circuit and carry out collection calculating, gathered by described signal processing and analysis circuit 8 pairs of signals, and calculate water salinity value corresponding to the described signal of telecommunication according to built-in relational model.
Described first optical fiber 10 is parallel placed side by side with the second optical fiber 11, and the exit end of described first optical fiber is equal to the distance of water body liquid level to be measured with the incidence end of the second optical fiber to the distance of water body liquid level to be measured.Described first optical fiber 10 and the second optical fiber 11 are all the optical fiber of diameter 1mm, and outside adds covering, and length is 1.5m, and one is merged into by the stainless steel tube that two-way fiber tip is 5mm by diameter, and the relative position of two-way optical fiber is fixed.Optical fiber 2 is become after described first optical fiber 10 and the second optical fiber 11 merge.
The upper bottom surface in described vacuum insulation chamber 12 is connected with the incidence end of the exit end of a described optical fiber and described second optical fiber, and the lower surface in described vacuum insulation chamber is connected with the liquid level of water body to be measured.The upper surface in described vacuum insulation chamber and lower surface are high glass 8 thoroughly.Isolated by the saturating glass of height and water body to be measured.Vacuum insulation chamber thickness is 7mm, and 13 is liquid cell, and for holding water body to be measured, liquid cell and extraneous water body are UNICOMs, can carry out fluid exchange arbitrarily, as shown in Figure 2.
Described light source is red bright LED source or laser diode, and the laser that described light source is launched enters described first optical fiber after lens 3 are assembled.The wavelength of described red bright LED source Emission Lasers is 675nm.Described device also comprises light source driving circuit, and it is in being connected with light source, is constant-current source DC driven to the type of drive of described light source, or exchanges driving; Described interchange type of drive is sine wave drive, square wave drives, triangular wave drives or wherein arbitrarily the superposition of two or more signals or modulation use.
Described signal conditioning circuit is according to the difference of described light source driving circuit type of drive, adopt different forms, be specially: described light source driving circuit is constant-current source DC driven, described signal conditioning circuit comprises the stream pressure converting unit, signal amplification unit and the low-pass filter unit that connect successively; Described light source driving circuit drives for exchanging, and described signal conditioning circuit comprises and connects stream pressure converting unit, signal amplification unit, bandpass filtering unit, lock-in amplify unit and low-pass filter unit successively.To interchange type of drive, first the signal of telecommunication that described photoelectric detector is uploaded is converted to voltage signal, then amplify through signal amplification unit, as amplified 105 times, filtering is carried out afterwards through bandpass filtering unit, filtering part noise, the filtered signal of telecommunication is through lock-in amplify circuit extraction useful signal, after carrying out intensity modulated by described low-pass filter unit again, obtain stable voltage signal, this signal is exactly the useful signal relevant to refractive index, finally enter described signal processing and analysis circuit, described signal processing and analysis circuit determines corresponding water salinity value according to the signal of telecommunication after modulation.
Described signal processing and analysis circuit also comprises digital temperature chip, carries out temperature-compensating to the measurement of water salinity.Described signal processing and analysis circuit carries out temperature-compensating according to built-in temperature backoff algorithm to result of calculation, namely according to the temperature data that digital temperature chip DS18B20 gathers, according to built-in model of temperature compensation, the voltage signal received is compensated, then calculate reliable refractive index, finally obtain water salinity value according to refractive index.Described signal processing and analysis circuit internal memory, for storing water salinity value, feeds back to operator by display screen simultaneously.
Described signal conditioning circuit can nurse one's health Amplitude of DC voltage based on LPF, based on lock-in amplify conditioning ac voltage signal, matches with the selection of light source driving circuit.
When described light source driving circuit 6 uses modulation signal driving LED light source, modulation signal is the sine wave of 5KHz.
Described first optical fiber is single core glass optical fiber, multicore glass optical fiber, single core plastic optical fiber or multicore plastic optical fiber; Described second optical fiber is single core glass optical fiber, multicore glass optical fiber, single core plastic optical fiber or multicore plastic optical fiber; Described photoelectric detector is photodiode or avalanche diode.
Described device also comprises display screen 9, and it connects in described signal processing and analysis circuit, for water salinity value being shown; Described device also comprises wireless communication unit, for water salinity value being wirelessly transmitted to user mobile phone by bluetooth or WIFI etc. or having the other-end equipment of radio communication.
As shown in Figure 1, the light that light source sends enters the first optical fiber through Lens Coupling, through the first fiber optic conduction to reflection probe top, inject through vacuum insulation chamber in water body to be measured, laser is at water body interfacial refraction, light after refraction forms a virtual image, second optical fiber can receive the light of this virtual image, due to the difference of refractive index, cause the focal length of the virtual image different, the luminous intensity entering the second optical fiber is accordingly different, and due to the thickness in vacuum insulation chamber be fixing, therefore, the light intensity entering the second optical fiber is only relevant with the refractive index of water body, just refractive index size can be calculated according to the light intensity that photoelectric detector detects, from calculating water salinity.
Device of the present utility model solves in existing checkout equipment, accuracy is low, can not the shortcoming such as on-line checkingi for a long time, realize the automatic measurement of water salinity, precision is high, speed is fast, can on-line checkingi for a long time, be not afraid of corrosion, life-span is long, built-in temperature chip and wireless transport module, realizes temperature-compensating and wireless transmission function, accurately convenient, save manpower and materials.
Use device of the present utility model, operation is very simple, and complete foolproof operation, only needs reflection probe 1 to drop in tested water body, then start shooting, and waits for for 30 stabilization times in second, just can see measurement result on a display screen.
Above embodiment only for illustration of the utility model, but not to restriction of the present utility model.Although be described in detail the utility model with reference to embodiment, those of ordinary skill in the art is to be understood that, various combination, amendment or equivalent replacement are carried out to the technical solution of the utility model, do not depart from the spirit and scope of technical solutions of the utility model, all should be encompassed in the middle of right of the present utility model.
Claims (10)
1. a water salinity checkout gear, is characterized in that, described device comprises reflection probe, light source, photoelectric detector, signal conditioning circuit and signal processing and analysis circuit; Described reflection probe comprises vacuum insulation chamber, the first optical fiber and the second optical fiber;
Described first optical fiber is connected with described light source, and described second optical fiber is connected with described photoelectric detector; Described vacuum insulation chamber is between the neat section and fluid to be measured of the first optical fiber, the second optical fiber; Described photoelectric detector is connected with described signal conditioning circuit; Described signal processing and analysis circuit is connected with described signal conditioning circuit.
2. device according to claim 1, is characterized in that, described first optical fiber is parallel placed side by side with the second optical fiber, and the exit end of described first optical fiber is concordant with the incidence end of described second optical fiber, and equal to the distance of water body liquid level to be measured.
3. device according to claim 2, is characterized in that, the upper bottom surface in described vacuum insulation chamber is connected with the incidence end of the exit end of described first optical fiber and described second optical fiber, and the lower surface of described vacuum chamber directly contacts with water body to be measured.
4. device according to claim 3, is characterized in that, the upper surface of described vacuum chamber and lower surface are high glass thoroughly.
5. the device according to any one of Claims 1-4, is characterized in that, described light source is LED light source or laser diode, and the light that described light source is launched enters described first optical fiber through Lens Coupling.
6. device according to claim 5, is characterized in that, described device also comprises light source driving circuit, and it is in being connected with light source, is constant-current source DC driven to the type of drive of described light source, or exchanges driving; Described interchange type of drive is sine wave drive, square wave drives, triangular wave drives or wherein arbitrarily the superposition of two or more signals or modulation use.
7. device according to claim 6, is characterized in that, described signal conditioning circuit, according to the difference of described light source driving circuit type of drive, adopts different forms, is specially:
Described light source driving circuit is constant-current source DC driven, and described signal conditioning circuit comprises the stream pressure converting unit, signal amplification unit and the low-pass filter unit that connect successively;
Described light source driving circuit drives for exchanging, and described signal conditioning circuit comprises and connects stream pressure converting unit, signal amplification unit, bandpass filtering unit, lock-in amplify unit and low-pass filter unit successively.
8. device according to claim 7, is characterized in that, described signal processing and analysis circuit gathers the signal after described signal conditioning circuit conditioning, and obtains corresponding water salinity value.
9. device according to claim 8, is characterized in that, described signal processing and analysis circuit also comprises digital temperature chip, carries out temperature-compensating to the measurement of water salinity.
10. the device according to any one of claim 6 to 9, is characterized in that, described first optical fiber is single core glass optical fiber, multicore glass optical fiber, single core plastic optical fiber or multicore plastic optical fiber;
Described second optical fiber is single core glass optical fiber, multicore glass optical fiber, single core plastic optical fiber or multicore plastic optical fiber;
Described photoelectric detector is photodiode or avalanche diode.
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| CN201420852431.6U CN204302181U (en) | 2014-12-26 | 2014-12-26 | A kind of water salinity checkout gear |
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| CN201420852431.6U CN204302181U (en) | 2014-12-26 | 2014-12-26 | A kind of water salinity checkout gear |
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| CN204302181U true CN204302181U (en) | 2015-04-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258798A (en) * | 2015-11-10 | 2016-01-20 | 华中科技大学 | A photoelectric detector spectral response test system and a measurement method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258798A (en) * | 2015-11-10 | 2016-01-20 | 华中科技大学 | A photoelectric detector spectral response test system and a measurement method thereof |
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