CN2577277Y - Interface chromatism descriminator - Google Patents

Abstract

The utility model is composed of an electronic circuit, a red laser source, a focusing lens and a spectroscope, wherein the red laser source, the focusing lens and the spectroscope are sequentially placed on an emitting light path; a detection signal receiving light path behind the spectroscope is provided with a photosensitive element. The utility model adopts the spectroscope to separate emitting light from reflecting light, and the receiving light path is shortened; the photosensitive element eliminates the interference of the emitting light to the receiving light path, and thus, the signal-to-noise ratio is increased; emitting laser centrally shines light rays in an optional position which is 10mm and 100mm away from the spectroscope via the focusing lens and the spectroscope, and a light spot of which the diameter is less than 1mm is formed. When the light spot is shone on delaminated objects (solid, liquid and gas) with color difference, and relative movement occurs, the reflecting light changes; after sensing the change, the photosensitive element outputs corresponding signals to inform that the color difference interface is detected. The electronic circuit generates a special power source to supply power to a laser tube, and simultaneously processes the interface color difference signals output by the photosensitive element.

Description

Interfacial color difference discrimination device

Technical field

The utility model relates to a kind of optical detecting instrument, particularly a kind of instrument of judging layering object interfacial color difference.

Background technology

Existing interfacial color difference discrimination device, form by electronic circuit, red laser source, photosensitive tube, optical fiber, collector lens and catoptron, the red laser source causes probe by the interior light path of optical fiber with laser, be radiated on the measured target by condenser lens and catoptron, detection signal is along the reflection of emission light path, and light path acts on photosensitive tube outside catoptron, collector lens and optical fiber, and electronic circuit is supplied with the laser tube power supply, and handle the reflected light that photosensitive tube receives, judge whether the aberration interface exists.This detector form long light path, thereby optical loss is bigger owing to adopt optical fiber and condenser lens, catoptron, and structure is also complicated, and emission light path and receiving light path are overlapping, cause interference, and signal to noise ratio reduces, and simultaneously, requires also higher to electronic circuit.

Summary of the invention

In view of the deficiency that above-mentioned interfacial color difference discrimination device exists, the purpose of this utility model be design a kind of simple in structure, signal to noise ratio is higher, volume is little, reduce electronic circuit requirement, the optoelectronic integration interfacial color difference discrimination device being convenient to install.

The design feature that the utility model is taked can achieve the above object, this aberration Discr. comprise electronic circuit,, it is characterized in that on the emission light path, a spectroscope being arranged, red laser source, condenser lens and spectroscope are positioned on the emission light path successively, the spectroscope back receives the detection signal light path and is provided with light activated element, and electronic circuit is connected with lasing light emitter with light activated element.

The utility model adopts spectroscope to separate emission light and reflected light, has shortened and has accepted light path.Light activated element is directly installed on the spectroscope back, eliminates the interference of emission light to receiving light path, has improved signal to noise ratio.Emission laser line focus lens and spectroscope on the optional position of distance spectroscope 10mm--100mm, form the hot spot of diameter less than 1mm with the light cover.Shine on the layering object (solid, liquefied gas) with aberration when hot spot, concurrent looks is to when motion, and reflected light promptly changes, and exports corresponding signal after the light activated element perception, informs to detect the aberration interface.Electronic circuit produces particular power source, to the laser tube power supply, handles the interfacial color difference signal of light activated element output simultaneously.

The utility model compared with prior art, given up optical fiber, replaced catoptron with spectroscope, separate emission light path and receiving light path with spectroscope, thereby simplify the structure, improved signal to noise ratio, reduced requirement to electronic circuit, finished the optoelectronic integration structure, reduced volume, therefore make this interfacial color difference detecting device precision height, volume little, be convenient to install.

Description of drawings

Fig. 1 has the interfacial color difference discrimination device structural representation

Fig. 2 the utility model structural representation

This interfacial color difference discrimination device of Fig. 3 is used for the structural drawing of blood cell collection device-alms bowl photoelectric sensor

From Fig. 1 as seen, existing interfacial color difference discrimination device, form by electronic circuit 1, red laser source 2, photosensitive tube 3, optical fiber 4, collector lens 5 and catoptron 6, the red laser source causes probe 7 by the interior light path 10 of optical fiber with laser, be radiated on the measured target 8 by condenser lens 5 and catoptron 6, detection signal is along 9 reflections of transmitting-receiving light path, light path 11 acts on photosensitive tube 3 outside catoptron 6, collector lens 5 and optical fiber, electronic circuit 1 is supplied with laser tube 2 power supplys, and handle the reflected light that photosensitive tube 3 receives, judge whether the aberration interface exists.This detector form long light path, thereby optical loss is bigger owing to adopt optical fiber, condenser lens and catoptron, and structure is also complicated, and emission light path and receiving light path are overlapping, cause interference, and signal to noise ratio reduces, and simultaneously, requires also higher to electronic circuit.

Among Fig. 2, this interfacial color difference detecting device adopts spectroscope 6 to separate emission light and reflected light, has shortened receiving light path.Light activated element 3 is directly installed on spectroscope 6 back, eliminates emission light to receiving the interference of light, has improved signal to noise ratio.The laser that emission laser tube 2 produces is concentrated light along light path 9 line focus lens 5 and spectroscope 6 and is penetrated on the optional position of distance spectroscope 10mm--100mm, forms the hot spot 8 of diameter less than 1mm.Shine on the layering object 12 (solid, liquid) with aberration when hot spot, concurrent looks is to when motion, and reflected light promptly changes, and acts on the light activated element 3 through light path 9, spectroscope 6, exports corresponding signal after the perception, informs to detect the aberration interface.Electronic circuit 1 produces particular power source, to laser tube 2 power supplies, handles the interfacial color difference signal of light activated element 3 outputs simultaneously.

As seen from Figure 3, sensor is made of lasing light emitter 2, condenser lens 5, spectroscope 6, light activated element 3, electronic circuit 1, optoelectronic integration casing 7, whole sensor is fixed on the hydro-extractor sleeve wall, and light source 2 adopts red laser diode, by electronic circuit 1 power supply.This light source light spectrum is narrower, and luminous power is stronger, because scattering angle is little, hot spot focuses on good.Spot diameter can see through the glass window on the optoelectronic integration casing 7 less than 1mm, is radiated at detected container---on the Centrifuge Cup, form hot spot 8.Spectroscope 6 is the aluminizer semi-permeable mirror, and receiving light activated element 3 is silicon photocell, is installed on the path of semi-permeable mirror 6 back receiving light paths.When hydro-extractor was worked, the blood in the Centrifuge Cup was by layering, and each interlayer has aberration.When the layering blood constituent when rim of a cup flows, promptly shone by hot spot 8.The reflected light that changes is by silicon photocell 3 perception, and after signal transported to electronic circuit 1 and handle, adds to microsystem and handle accordingly.

Claims (1)

1, interfacial color difference discrimination device, comprise electronic circuit, red laser source and condenser lens, it is characterized in that on the emission light path, a spectroscope being arranged, red laser source, condenser lens and spectroscope are positioned on the emission light path successively, the spectroscope back receives the detection signal light path and is provided with light activated element, and electronic circuit is connected with lasing light emitter with light activated element.

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