CN103149181A - Glass light transmittance detection device - Google Patents
Glass light transmittance detection device Download PDFInfo
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- CN103149181A CN103149181A CN2013100425488A CN201310042548A CN103149181A CN 103149181 A CN103149181 A CN 103149181A CN 2013100425488 A CN2013100425488 A CN 2013100425488A CN 201310042548 A CN201310042548 A CN 201310042548A CN 103149181 A CN103149181 A CN 103149181A
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Abstract
The invention discloses a glass light transmittance detection device which comprises a light path emission unit, a light path receiving unit and a computation and display unit. The light path emission unit comprises a shell body, an emission module is arranged in the shell body, and the emission module comprises a light source and a semitransparent and semireflective device. The light path receiving unit comprises a shell body, a receiving module is arranged in the shell body, the receiving module comprises a first photovoltaic detector, a plurality of magnets are arranged on the outer side of the shell body, and the light path emission unit and the light path receiving unit are combined together through magnet aligning attraction. Two methods including magnetic positioning and light path correction are combined, and a detecting instrument is enabled to obtain reliable light transmittance data of ultraviolet light, visible light and infrared light even when the detecting instrument is slightly inclined or misplaced; and meanwhile the semitransparent and semireflective structure is adopted to measure explosion-proof membrane reflectivity simultaneously, and the heat-insulation and ultraviolet light shielding performance of glass can be measured in a more visualized manner.
Description
Technical field
The invention belongs to the optical detective technology field, be specifically related to a kind of pick-up unit of glass transmittance.
Background technology
The automobile market of China has replaced the U.S. at present becomes new car market the biggest in the world, considers the factors such as attractive in appearance, heat insulation, and general new car vehicle window all can post blow-out disc.Clear in " motor vehicle safe and technical specification ": beyond windscreen and air regulator glass be used for the visible transmission ratio at driver's vision area position should be more than or equal to 70%.The vehicle window pad pasting of high-quality not only should have good heat-proof quality, effectively intercepts automobile and absorbs heat, also permeability preferably should be arranged simultaneously, and the driver sees through glass for vehicle window and can clearly see and avoiding traffic accident in the place ahead.Point out the traffic police in " information of safety inspection for motor vehicles project and method " when checking driver's two side window glass, can use in case of necessity luminous transmittance measuring to check the visible transmission ratio.Because the transmittance specialty instrument of present domestic inspection vehicle glass pane is not a large amount of universal, the car owner does not often know to stick the transmittance of blow-out disc vehicle rear window.Especially after sticking some blow-out discs inferior, the transmittance of vehicle window is lower, has not both met technical manual, and also impact is driven, and buries accident potential.
Present light transmittance detector on the market generally has two kinds to measure structures, and a kind of is concave structure, and another kind is separate type.The detector of concave structure detects by glass being stuck in groove central authorities, but this metering system need glass around at least one border do not intercept, usually can only be used for detecting driver both sides vehicle window, and need vehicle window is turned down when detecting.Because there is certain depth in groove, so can't detect the transmittance of glass optional position.
Separate type is divided into transmitter unit and receiving element, and two module units are separate, and this structure can detect glass optional position transmittance.But because transmitter unit relies on hand-held the aligning with receiving element, port can not be accomplished to overlap fully, after applying, slight inclination or dislocation may be arranged, and the light beam of transmitter unit can't collimate and enter receiving element, therefore measuring accuracy is lower, repeatability is relatively poor.In addition, the function of present transmittance instrument on the market is also more single, can only detect the transmissivity of glass, can't detect simultaneously the thermal insulation of pad pasting glass and the effect of shielding of ultraviolet.
Summary of the invention
For the existing above-mentioned technical matters of prior art, the invention provides a kind of pick-up unit of glass transmittance, simple in structure, multiple functional, measuring accuracy is high.
A kind of pick-up unit of glass transmittance comprises light path transmitter unit, light path receiving element and calculates display unit, and described light path transmitter unit and light path receiving element are positioned at glass to be measured both sides; Wherein: described light path transmitter unit comprises housing, is provided with transmitter module in this housing, and described transmitter module comprises:
Light source, it is used for the emission light beam;
The semi-transflective reflective device, it is used for the light beam that transmitted light source is launched, and the light beam of transmission is projected to glass to be measured;
Described light path receiving element comprises housing, is provided with receiver module in this housing; Described receiver module comprises the first photovoltaic detector, it receives the light beam through glass transmission to be measured, and the illuminance of this light beam is converted to electric signal sends the calculating display unit to, described calculating display unit calculates the transmissivity of glass to be measured and shows according to this electric signal;
Described hull outside is provided with polylith magnet, and described light path transmitter unit and light path receiving element are by the magnet alignment adhesive.
Preferably, described light source is by the first diaphragm emission light beam; Be used for collimated light beam, make it be similar to pointolite by reducing first aperture of the diaphragm specifically.
Preferably, described semi-transflective reflective device is projected to glass to be measured with the light beam of transmission by the 4th diaphragm; The 4th diaphragm is used for the parasitic light of interception lens and fixture generation.
Preferably, described semi-transflective reflective device receives by first lens light beam that light source launches and to its transmission; Adopt the lens converging beam, make light beam have stronger penetration capacity.
Preferably, described the first photovoltaic detector receives light beam through glass transmission to be measured by the second lens and the second diaphragm successively; The effect of the second lens is to converge transmitted light beam, improves light beam illumination by reducing facula area, is beneficial to detector and detects, and the second diaphragm is used for stopping extraneous parasitic light.
Preferably, described transmitter module also comprises the second photovoltaic detector, described semi-transflective reflective device receives the light beam that returns through glass-reflected to be measured, and with this beam reflection to the second photovoltaic detector, described the second photovoltaic detector is converted to electric signal with the illuminance of the light beam that receives and sends the calculating display unit to, and described calculating display unit calculates the reflectivity of glass to be measured and shows according to this electric signal; By adopting semi-transflective reflective device simplied system structure, recently estimate the folded light beam light intensity by controlling reflection, make system have the ability of measuring reflective light intensity by adopting this structure.
Further preferably, described the second photovoltaic detector receives light beam through the reflection of semi-transflective reflective device by the 3rd lens and the 3rd diaphragm successively; The effect of the 3rd lens is to converge transmitted light beam, improves light beam illumination by reducing facula area, is beneficial to detector and detects, and the 3rd diaphragm is used for stopping extraneous parasitic light.
Preferably, described light source is connected with drive control module, and described drive control module is connected with the calculating display unit, and it is used to light source that operating voltage is provided, and controls light source luminescent; By controlling the bright minimizing parasitic light that secretly reaches of light source, the purpose of filter out background noise.
Preferably, be provided with three transmitter modules in the housing of described light path transmitter unit, three light sources in three transmitter modules adopt respectively white light emitting diode, infrarede emitting diode and ultraviolet light-emitting diode, are provided with three receiver modules corresponding with transmitter module in the housing of described light path receiving element; Make system possess the ability of the transmittance of the wider spectral band of measurement.
Described semi-transflective reflective device adopts a side surface to be coated with the optical glass of optical thin film; Photovoltaic detector adopts photodiode; Calculate display unit and built by signal processing module, DSP and man-machine interface, signal processing module is connected with photovoltaic detector, and DSP is connected with signal processing module with man-machine interface.
Principle of work of the present invention is: the light path transmitter unit is used for the emission light beam, and wherein segment beam penetrates mother glass, is received by the light path receiving element, and segment beam is reflected back the light path transmitter unit by mother glass.There are ultraviolet, visible, infrared beam receiver module to be used for receiving transmitted light beam in the light path receiving element, and signal is transferred to the calculating display unit, calculate transmittance; Transmitter module in the light path transmitter unit has the semi-transflective reflective device, to photovoltaic detector, equally signal is transferred to the calculating display unit by beam reflection that glass-reflected is returned, calculates reflectivity.
Beneficial effect of the present invention is as follows:
(1) comprehensive magnetic location of the present invention and light path are corrected dual mode, make detector in the situation that summary low dip or dislocation also can obtain the transmittance data of ultraviolet light, visible light, infrared light comparatively reliably.
(2) the present invention by drive control module optimum detection flow process, reduces parasitic light, and automatically real-time filter out background noise improves accuracy of detection.
(3) the present invention adopts the multi-pass timesharing to measure visible light, infrared light, the ultraviolet light transmittance of glass, and the step that simplifies the operation can be than more comprehensive assessment glass transmittance.
(4) the present invention adopts semi-transparent semi-reflecting structure to measure simultaneously the blow-out disc reflectivity, can record comparatively intuitively glass heat-proof and block the ultraviolet light performance.
(5) the present invention adopts lens that light beam is converged rear penetrable thicker glass, also is applicable to build the transmittance detection of double glazing except glass for vehicle window.
Description of drawings
Fig. 1 is the structural representation of pick-up unit of the present invention.
Fig. 2 is transmitter module and the optical texture schematic diagram of its corresponding receiver module.
Fig. 3 is the schematic diagram of putting of magnet.
Fig. 4 is the testing process schematic diagram of pick-up unit of the present invention.
Embodiment
In order more specifically to describe the present invention, below in conjunction with the drawings and the specific embodiments, technical scheme of the present invention and principle of work thereof are elaborated.
As depicted in figs. 1 and 2, a kind of pick-up unit of glass transmittance comprises light path transmitter unit, light path receiving element and calculates display unit, and light path transmitter unit and light path receiving element are positioned at glass for vehicle window both sides; Wherein: the light path transmitter unit comprises housing, be provided with three transmitter modules (VISIBLE LIGHT EMISSION module, infrared light emission module, ultraviolet light emission module) and a drive control module in this housing, transmitter module comprises light source 1, the first diaphragm 2, first lens 3, semi-transflective reflective device 8, the 4th diaphragm 4, the 3rd lens 9, the 3rd diaphragm 11 and the second photovoltaic detector 10; Wherein:
Light source 1 is by the first diaphragm 2 emission light beams, and it is connected with drive control module, and drive control module is connected with the calculating display unit, and it is used to light source that operating voltage is provided, and according to the signal controlling light source luminescent that calculates display unit; Three light sources in three transmitter modules adopt respectively white light emitting diode, infrarede emitting diode (peak wavelength is 960nm) and ultraviolet light-emitting diode (peak wavelength is 390nm);
First lens 3 is located between light source 1 and semi-transflective reflective device 8, and it is used for converging the light beam that light source 1 is launched;
Semi-transflective reflective device 8 is used for the light beam of transmission after converging, and the light beam of transmission is projected to glass for vehicle window by the 4th diaphragm 4, semi-transflective reflective device 8 also receives the light beam that is reflected back through glass for vehicle window, and this light beam is reflexed to the second photovoltaic detector 10 by the 3rd lens 9;
The 3rd lens 9 are located between the second photovoltaic detector 10 and semi-transflective reflective device 8, and it is used for converging the light beam through 8 reflections of semi-transflective reflective device;
The second photovoltaic detector 10 is converted to electric signal by the 3rd diaphragm 11 with the illuminance of the light beam that receives successively and sends the calculating display unit to, calculates display unit and calculates the reflectivity of glass for vehicle window and show according to this electric signal.
The light path receiving element comprises housing, is provided with three receiver modules corresponding with transmitter module in this housing;
Receiver module comprises the first photovoltaic detector 7, the second lens 5 and the second diaphragm 6; Wherein:
The light beam that the first photovoltaic detector 7 receives through the glass for vehicle window transmission by the second lens 5 and the second diaphragm 6 successively, and the illuminance of this light beam is converted to electric signal sends the calculating display unit to, calculate display unit and calculate the transmissivity of glass for vehicle window and show according to this electric signal;
After being used for converging through the light beam of glass for vehicle window transmission, the second lens 5 are projected to the first photovoltaic detector 7.
In present embodiment, the semi-transflective reflective device adopts a side surface to be coated with the optical glass of optical thin film; Photovoltaic detector adopts photodiode; Calculate display unit and built by signal processing module, DSP and man-machine interface, signal processing module is connected with photovoltaic detector, and DSP is connected with man-machine interface, drive control module and signal processing module; Signal processing module is used for the electric signal of photovoltaic detector output is carried out sending DSP to after signal condition and analog to digital conversion, and DSP goes out perspective rate and the reflectivity of glass for vehicle window according to the calculated signals that receives, and shows by man-machine interface; The user can input instruction and then control drive control module by DSP by man-machine interface, to control switch and the light intensity of light source.
Usually the spectral transmittance of medium may be defined as τ=Φ '/Φ, and wherein Φ ' is the luminous flux of medium outgoing, and Φ is the luminous flux of medium incident.According to illuminance definition, equal to be radiated at the ratio of luminous flux phi and the area S of this bin on this bin in the illuminance on light receiving surface, that is: E=Φ/S.The know-why of present embodiment is above-mentioned two definition, at first detect light beam and penetrate illumination E (the illumination E that each light intensity condition of light source is corresponding that is radiated at after air on detector, storage is all arranged) in DSP, next detects light beam and penetrates the illumination E ' on detector of being radiated at after mother glass, because the transmittance of air equals 1 substantially, and the detector receiving area is constant, therefore the transmittance of mother glass can be expressed as τ=E '/E.In like manner dieletric reflection rate r is defined as the luminous flux phi r of reflection and the ratio of incident flux Φ, and namely r=Φ r/ Φ, due to the illuminance value E that records incident light, by measuring catoptrical illuminance value Er, can calculate r=Er/E.
Above-mentioned hull outside is equipped with four blocks of magnet, and light path transmitter unit and light path receiving element are by the magnet alignment adhesive.The mounting means of magnet as shown in Figure 3, mode a is that the housing upper and lower is placed opposite polarity magnet, mode b is that opposite polarity magnet is placed in the housing left and right, mode c is that opposite polarity magnet is placed in the box body dislocation.The situation that can misplace or tilt when relying on magnet suction fixedly due to housing, in rectangular box, the vacant position of magnet upper and lower is larger, and the vacant position of right and left is less, the box body degree of misalignment of the installation of employing mode b is slightly less than mode a.Mode c diagonal position magnet polarity is identical, and in Unit two, after any finite element rotation 180 degree, both still can adhesive, can cause so the unmatched problem of emission port and receiving port.Therefore the present embodiment adopts mode b that magnet is installed, can reduce to a certain degree dislocation and the situation of inclination.
Mode by magnetic attraction can lean against instrument on glass securely, but may not necessarily accurately aim on the exit ports of instrument and emission port stricti jurise, may have inclination or the dislocation of 1～2mm, needs to rely on the mode of optical lens to correct.Because the aperture of the first diaphragm 2 is less, can be similar to regard pointolite as in the present embodiment, the light beam of launching hot spot homogeneity after first lens 3 collimations and the 4th diaphragm 4 filtrations is better.Because the first photovoltaic detector 7 photosensitive areas are slightly less than facula area, when the outgoing beam dislocation after debugging or slant range are in 1～2mm, hot spot after the second lens 5 converge has covered the light-sensitive surface of the first photovoltaic detector 7 substantially, therefore reach the purpose of correcting light path.
Simultaneously, present embodiment adopts the second diaphragm 6 and drive control module to reduce parasitic light and ground unrest, improves accuracy of detection.Acting as of the second diaphragm 6 stops extraneous parasitic light, guarantees that collimated light beam is radiated on photovoltaic detector.When detecting, drive control module is by controlling light source, make it have the delay of certain hour to light, during this period of time the light signal that receives of photovoltaic detector is ground unrest, and photovoltaic detector feeds back to DSP with the electric signal of conversion, and DSP obtains dark attitude transmittance T ' through converting, three light sources are lighted successively subsequently, this moment, photovoltaic detector to DSP, obtained bright attitude transmittance T through conversion with the electric signal transmission of conversion, last actual transmission t=T-T '.The albedo measurement process is identical with it, and by measuring dark attitude reflectivity and bright attitude reflectivity, both subtract each other and obtain actual reflectance at last.In addition, because light source is lighted successively, detector receives successively, has avoided so a plurality of light sources to light simultaneously the undesired signal of generation, has reduced the parasitic light signal.
The testing process of present embodiment is divided into three steps as shown in Figure 4 substantially, is respectively: System self-test, the dark attitude transmittance of measurement and reflectivity, the bright attitude transmittance of measurement and reflectivity.
System self-test is partly for whether each parts of detecting instrument are normal, also determines benchmark by measuring the air transmittance simultaneously.At first, the prompting user carries out System self-test on display, with transmitter unit and the direct adhesive of receiving element.After the user confirmed the instrument adhesive, system began to detect, and puts successively bright light source.After the first photovoltaic detector 7 receives normal signal, transmit it to DSP, obtain the air transmittance through computing, point out simultaneously user's self check to pass through.After if system starts working, light source is not lighted, or the abnormal signal of the first photovoltaic detector 7 receptions, and prompting reports an error, and gives the code name that is out of order, and the user is by the query specification book or report system's self check again after fault to be solved for repairment.
After self check was passed through, display prompts user measured dark attitude transmittance and dark attitude reflectivity with instrument adhesive glass for vehicle window.System's autoshutdown light source, and begin to detect.The ambient noise signal that the first photovoltaic detector 7 and the second photovoltaic detector 10 obtain detection respectively transfers to DSP, obtains dark attitude transmittance T ' and dark attitude reflectivity R ' through computing.After data measured, the display prompts user carries out bright attitude transmittance and bright attitude albedo measurement.
System begins to carry out bright attitude transmittance and reflectivity detects.Light source is lighted successively, and the light signal that the first photovoltaic detector 7 detects obtains bright attitude transmittance T through translation operation, can obtain bright attitude reflectivity R by the light signal of the second photovoltaic detector 10.DSP carries out calculation process to above-mentioned data, obtains actual transmittance τ and the actual reflectance r of three kinds of optical bands of glass for vehicle window.
Claims (10)
1. the pick-up unit of a glass transmittance comprises light path transmitter unit, light path receiving element and calculates display unit, and described light path transmitter unit and light path receiving element are positioned at glass to be measured both sides; It is characterized in that: described light path transmitter unit comprises housing, is provided with transmitter module in this housing, and described transmitter module comprises:
Light source, it is used for the emission light beam;
The semi-transflective reflective device, it is used for the light beam that transmitted light source is launched, and the light beam of transmission is projected to glass to be measured;
Described light path receiving element comprises housing, is provided with receiver module in this housing; Described receiver module comprises the first photovoltaic detector, it receives the light beam through glass transmission to be measured, and the illuminance of this light beam is converted to electric signal sends the calculating display unit to, described calculating display unit calculates the transmissivity of glass to be measured and shows according to this electric signal;
Described hull outside is provided with polylith magnet, and described light path transmitter unit and light path receiving element are by the magnet alignment adhesive.
2. pick-up unit according to claim 1 is characterized in that: described light source is by the first diaphragm emission light beam.
3. pick-up unit according to claim 1, it is characterized in that: described semi-transflective reflective device is projected to glass to be measured with the light beam of transmission by the 4th diaphragm.
4. pick-up unit according to claim 1 is characterized in that: described semi-transflective reflective device receives by first lens light beam that light source launches and to its transmission.
5. pick-up unit according to claim 1 is characterized in that: described the first photovoltaic detector receives light beam through glass transmission to be measured by the second lens and the second diaphragm successively.
6. pick-up unit according to claim 1, it is characterized in that: described transmitter module also comprises the second photovoltaic detector, described semi-transflective reflective device receives the light beam that returns through glass-reflected to be measured, and with this beam reflection to the second photovoltaic detector, described the second photovoltaic detector is converted to electric signal with the illuminance of the light beam that receives and sends the calculating display unit to, and described calculating display unit calculates the reflectivity of glass to be measured and shows according to this electric signal.
7. pick-up unit according to claim 6, is characterized in that: the light beam that described the second photovoltaic detector reflects through the semi-transflective reflective device by the 3rd lens and the reception of the 3rd diaphragm successively.
8. pick-up unit according to claim 1, it is characterized in that: described light source is connected with drive control module, described drive control module with calculate display unit and be connected, it is used to light source that operating voltage is provided, the control light source luminescent.
9. pick-up unit according to claim 1, it is characterized in that: be provided with three transmitter modules in the housing of described light path transmitter unit, three light sources in three transmitter modules adopt respectively white light emitting diode, infrarede emitting diode and ultraviolet light-emitting diode; Be provided with three receiver modules corresponding with transmitter module in the housing of described light path receiving element.
10. pick-up unit according to claim 1 is characterized in that: described calculating display unit is built by signal processing module, DSP and man-machine interface, and signal processing module is connected with photovoltaic detector, and DSP is connected with signal processing module with man-machine interface.
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| CN201310042548.8A CN103149181B (en) | 2013-01-31 | 2013-01-31 | Glass light transmittance detection device |
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| CN201310042548.8A CN103149181B (en) | 2013-01-31 | 2013-01-31 | Glass light transmittance detection device |
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