Water quality transparency detection deviceTechnical field
The present invention relates to water quality inspection techniques, more particularly to a kind of technology of water quality transparency detection device.
Background technology
Usual water is the liquid of water white transparency, but the water quality in River Channel is due to containing silt, microorganisms in water, lifeThe substances such as living and industrial discharge cause water body muddiness and coloration to change, and transparency declines, and human eye sense organ is bad.The index showsThe alteration in nutrition of water quality causes the variation of the survival environmental conditions of aqueous bio.With the raising needs pair of water body environmental requirementRiver water body carries out the monitoring of continuous transparency.
Existing water quality transparency detection mainly has following two:
1)Artificial detection is implemented in scene using Sai Shi disk methods, and the detection instrument of this method is a diameter 20cm disk, on diskSurface indicates the label of the black and white quartering, and is fixed with rope in disc centre, and disk bottom surface is equipped with weight, by disk when detectionSlowly into the water, after not seeing the label of the black and white on disk visually, measure rope enters water length, further according to ropeEnter the transparency of water length computation water-outlet body.
2)Cross method examinations are used in laboratory, the detection instrument of this method is a colourless plexiglass cylinder,The length of cylinder is 330MM, internal diameter 25MM, and cylinder is marked with 1MM indexing, and cylinder bottom is equipped with white tile, and tile is marked with blackThe water sample mixed well is transferred in cylinder and is filled by color cross, when detection, is visually observed from nozzle, is beaten simultaneously vertically downwardThe switch for opening cylinder lower end water outlet discharges water, and stops when until water level decreasing is to the black cross figure that can just recognize on tileIt only discharges water, then reads the height of water column, the transparency of water-outlet body is calculated further according to water-column.
Above two water quality transparency detection method is required for observing and measuring under certain illuminating ray, and is seen by human eyeThe differentia influence of survey, measurement accuracy is poor, using also being limited by environmental change, can not continuously measure, especially at the sceneIt cannot be used when night is without light.
Invention content
Defect present in for the above-mentioned prior art, technical problem to be solved by the invention is to provide a kind of measurement essencesDegree is high, and is not influenced by ambient lighting, can realize the water quality transparency detection device continuously measured.
In order to solve the above-mentioned technical problem, a kind of water quality transparency detection device provided by the present invention, it is characterised in that:Including pedestal, laser emitter, silicon photocell, detection circuit;
The pedestal be equipped with closed electrical storehouse, the electrical storehouse be equipped with light exit window, light entrance window, laser emitter,Silicon photocell, detection circuit are separately mounted in electrical storehouse;
The laser emitter forms light connects with silicon photocell, and the light path between laser emitter and silicon photocell is sent out from laserAfter emitter is set out, the light exit window in electrical storehouse is initially passed through, exterior space is entered, be then passed through the light entrance window in electrical storehouse, reachedSilicon photocell;
The detection circuit includes that master controller, electric current turn voltage module, analog-to-digital conversion module;The electric current of the silicon photocell is believedNumber output port turns the input end of analog signal mouth that voltage module is connected to analog-to-digital conversion module through electric current, and electric current turns voltage module useAnalog-to-digital conversion module, the number of analog-to-digital conversion module are inputted after the current signal for exporting silicon photocell is converted to voltage signalThe data port of signal output port and master controller interconnects.
Further, the electrical storehouse is laid in the left end of pedestal, and the right end of pedestal is equipped with the first speculum, the second reflectionMirror passes through successively after the light path between laser emitter and silicon photocell passes through the light exit window in electrical storehouse to enter exterior spaceFirst speculum, the second speculum reflection after, be then passed through the light entrance window in electrical storehouse, reach silicon photocell.
Further, the laser emitter is the laser emitter for the feux rouges that launch wavelength is 650nm.
Water quality transparency detection device provided by the invention, by the cooperation of laser emitter and silicon photocell, according to siliconThe attenuation degree of laser received by photocell calculates water quality transparency automatically, has the characteristics that high certainty of measurement, andIt is not influenced by ambient lighting, can be carried out measuring under any environment, can realize continuous measurement.
Description of the drawings
Fig. 1 is the front view of the water quality transparency detection device of the embodiment of the present invention;
Fig. 2 is the sectional view after line A-A cutting of the water quality transparency detection device of the embodiment of the present invention in Fig. 1;
Fig. 3 is the operation principle block diagram of the water quality transparency detection device of the embodiment of the present invention.
Specific implementation mode
The embodiment of the present invention is described in further detail below in conjunction with description of the drawings, but the present embodiment is not used to limitThe system present invention, every similar structure using the present invention and its similar variation, should all be included in protection scope of the present invention, the present inventionIn pause mark indicate the relationship of sum.
As shown in Figure 1-Figure 3, a kind of water quality transparency detection device that the embodiment of the present invention is provided, it is characterised in that:Including pedestal D1, laser emitter S1, silicon photocell B1, detection circuit U0;
The pedestal D1 is equipped with closed electrical storehouse, and the electrical storehouse is equipped with light exit window W1, light entrance window W2, laser hairEmitter S1, silicon photocell B1, detection circuit U0 are separately mounted in electrical storehouse;
The laser emitter S1 and silicon photocell B1 forms light connects, and the light path between laser emitter and silicon photocell is from swashingAfter optical transmitting set S1 sets out, the light exit window W1 in electrical storehouse is initially passed through, exterior space is entered, the light for being then passed through electrical storehouse is incidentWindow W2 reaches silicon photocell B1;
The detection circuit U0 includes that master controller U1, electric current turn voltage module U2, analog-to-digital conversion module U3;The silicon photocellThe current signal output end mouth of B1 turns the input end of analog signal mouth that voltage module U2 is connected to analog-to-digital conversion module U3 through electric current, electricityCirculation voltage-mode founds block for inputting analog-to-digital conversion module, mould after the current signal that silicon photocell exports is converted to voltage signalThe digital signal output end mouth of number conversion module U3 is interconnected with the data port of master controller U1.
In the embodiment of the present invention, the electrical storehouse is laid in the left end of pedestal D1, and the right end of pedestal D1 is equipped with the first reflectionMirror J1, the second speculum J2, it is outer that the light path between laser emitter and silicon photocell passes through the light exit window in electrical storehouse to enterBehind portion space, successively through the first speculum, the second speculum reflection after, be then passed through the light entrance window in electrical storehouse, reach silicon lightBattery;By the reflection of the first speculum, the second speculum, light path can be made to turn back, so as to so that laser emitter, silicon lightBattery is laid in homonymy, can substantially reduce the length of pedestal, and the dosage of detected water sample can also be greatly decreased.
In the embodiment of the present invention, the laser emitter is the laser emitter for the feux rouges that launch wavelength is 650nm,The feux rouges that wavelength is 650nm attenuation coefficient in river water is small.
In the embodiment of the present invention, the master controller U1, electric current turn voltage module U2, analog-to-digital conversion module U3 is existingTechnology, master controller is using microcontroller.
The operation principle of the embodiment of the present invention is as follows:
Water quality transparency detection device is put into tested water body, the red laser of laser transmitter projects by tested water body, thenThrough the first speculum, the second speculum reflection after be radiated at silicon photocell(The spectral sensitivity of silicon photocell is close to human eyeSensitivity)On, heterogeneity is contained in different tested water bodys, also will produce different degrees of decaying when reaching silicon photocell(Laser energy can be absorbed by water body), the irradiation energy that silicon photocell is absorbed can also change, and silicon photocell is according to being connectThe intensity of the red laser received generates the current signal of respective strengths, and is turned after voltage module is converted to voltage signal by electric currentAnalog-to-digital conversion module is inputted, then master controller is inputted after being converted to digital signal by analog-to-digital conversion module, is converted by master controllerFor water quality transparency.
The calculation formula of water quality transparency is:
Wherein, ST is water quality transparency,It is silicon photocell according to the intensity of received red laser(Swash in the present embodimentThe light path spacing of optical transmitting set and silicon photocell is 21cm),For the half-light intensity of silicon photocell when there is no light.