CN105928881B - A kind of the window mirror delustring detection method and detection device of transmission-type visual range visibility meter - Google Patents
A kind of the window mirror delustring detection method and detection device of transmission-type visual range visibility meter Download PDFInfo
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- CN105928881B CN105928881B CN201610245604.1A CN201610245604A CN105928881B CN 105928881 B CN105928881 B CN 105928881B CN 201610245604 A CN201610245604 A CN 201610245604A CN 105928881 B CN105928881 B CN 105928881B
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Abstract
The invention discloses the window mirror delustring detection methods and detection device of a kind of transmission-type visual range visibility meter, are related to the measuring system and apparatus structure of transmission-type visual range visibility meter.The detection device includes three face-port components of a U type, and is placed in tri- tunnel optical measuring systems of seal chamber Nei, multi channel signals amplifier, modulus a/d transducer, microprocessor and the lens cap of transmission-type visual range visibility meter.The detection method measures optical signal and passes through the light signal strength I after front form and the first side window successively12, optical signal pass through the light signal strength I after front form and the second side window13, optical signal pass through the light signal strength I after the first side window and the second side window23, and the incident intensity I of calibration optical signal is measured in advance0Value calculates the extinction coefficient for obtaining front form according to extinction coefficient formula.The present invention not only can more accurately measure the extinction coefficient value of front form, and can enhance the cleaning protection effect to form.
Description
Technical field
The present invention relates to the measuring systems and apparatus structure of transmission-type visual range visibility meter.More particularly, refer to one kind
It is suitable for but is not limited to the window mirror pollution delustring detection method and device of transmission-type visual range visibility meter.
Background technology
Visibility meter is reported in the automatic monitoring of weather phenomenon, the traffic safety early warning on airport, highway and railway etc.
Aspect plays a crucial role, and especially visual range visibility meter is airport automatic meteorological observation early warning system, vector aircraft
The indispensable component part of landing.Transmission-type visual range visibility meter is measured former due to that can be widely used in various meteorological conditions
Reason is simple, especially self capacity rating with measuring basis, and measurement method is direct, therefore airport acquisition at home and abroad is answered extensively
With.The basic principle of this measurement method is：Signal transmitter is generated and transmitted by optical signal, is connect by being separated by tens meters of remote signals
Receipts machine optical signal of the detection after the propagation in atmosphere and data processor for being sent into instrument is calculated by the processing to optical signal
Extinction coefficient value caused by atmospheric attenuation, and substitute into known calculations model and obtain visual range visibility value.
However, due in the measurement of optical signal, the decaying of light comes not only from atmospheric environment, also includes because of instrument
Optical attenuation caused by the pollution of window mirror, measured optical signal are the aliasings of the two.Therefore, in order to more accurately measure air
Visibility value, it is necessary to which delustring caused by being polluted to instrument window mirror is accurately measured, to correct the delustring system of visibility measurement
Numerical value, while being also required to cleaning and the protection scheme of extinction condition design window mirror according to window mirror.Currently, disappearing both at home and abroad in window mirror
In terms of the detection method of light and pollution protection, the two-sided window construction and open air blowing that mostly use a kind of v-shaped or class v-shaped are protected
Protection unit designs, and the light path of window mirror delustring is laterally across two-sided window, and orthogonal with visibility measurement light beam, the two passes through window mirror
Same area, blow from top to bottom pass through two-sided window outer surface, to play the cleaning to window mirror and protective effect.This kind of window
There are some disadvantages for mirror detection method and device：(1) since window mirror light path is laterally across two-sided window, measurement the result is that double
The average value of face-port delustring, and visibility measurement light beam is in an axial direction only by a window mirror in two-sided window, therefore window mirror delustring
Measurement can lead to certain measurement error in optical design；(2) since the design of two-sided window is front end open type, although
It is easy to clean, but flow through the diverging of the protection air-flow before window rapidly, it is limited to the protective action of window mirror, it is necessary to often artificial cleaning window
Mirror.
Invention content
It is above-mentioned based on the two-sided window construction of v-shaped existing deficiency in terms of window mirror delustring detection and protection, the present invention to overcome
A kind of completely new window mirror delustring accurate detection device and method based on three face-port of U- types is proposed, which is suitable for
Transmission-type visual range visibility meter, but it is not limited to such measuring instrument.
Present invention firstly provides a kind of window mirror delustring detection device of transmission-type visual range visibility meter, the detection devices
Three face-port components, three tunnel optical measuring systems, multi channel signals amplifier, modulus a/d transducer, Wei Chu including a U- type
Manage device and a lens cap.Three tunnel therein optical measuring system, multi channel signals amplifier, modulus a/d transducer and Wei Chu
Reason device is positioned in the seal chamber of transmission-type visual range visibility meter, because visibility measurement light beam is only regarded by the front of U- type windows
Window, therefore it is to obtain the extinction coefficient of front form to detect target.In three tunnel optical measuring systems, first via optical signal passes through
The front form and the first side window of U- type windows, emergent light are received by the first photodetector, and it is I to measure light signal strength12.The
Two road optical signals are received by the front form and the second side window of U- type windows, emergent light by the second photodetector, and light is measured
Signal strength is I13.Third road optical signal is visited by the first side window and the second side window of U- type windows, emergent light by third photoelectricity
It surveys device to receive, it is I to measure light signal strength23.Optical signal passes through the incident light before front form, the first side window and the second side window
It is I by force0.If the thickness of three window mirrors is identical, the extinction coefficient of front form can be acquired by following formula (1).
Wherein, x is distance of the optical signal by window mirror, can use the thickness of window eyeglass.I12、I13And I23It is optical signal respectively
Pass through the light signal strength after front form and the first side window, front form and the second side window, the first side window and the second side window.I0
It is optical signal by the incident intensity before window mirror, calibration can be measured in advance.
The window mirror delustring detection method of the transmission-type visual range visibility meter, includes the following steps：
The first step, optical signal are measured by the light signal strength after front form and the first side window.What first light source was sent out
Optical signal passes through the front form of U- type windows and the first side window to reach the first photodetector, the optical signal amplified output measured
Intensity value afterwards is I12；
Second step, optical signal are measured by the light signal strength after front form and the second side window.What second light source was sent out
Optical signal passes through the front form of U- type windows and the second side window to reach the second photodetector, the optical signal amplified output measured
Intensity value afterwards is I13；
Third walks, and optical signal is measured by the light signal strength after the first side window and the second side window.Third light source is sent out
Optical signal passes through two side windows of U- type windows to reach third photodetector, the intensity value after the optical signal amplified output measured
For I23；
4th step, the calculating of front form extinction coefficient.The light signal strength that above-mentioned three tunnel optical measuring system is obtained
Value I12、I13、I23With the advance I for measuring calibration0It is worth input microprocessor, is calculated by formula (1), find out front form
Extinction coefficient value σ1.Wherein, system to the delustring measurement of U- type windows is started after visibility measurement process is completed, to keep away
Exempt from the interference of visibility measurement optical signal.
The advantages of window mirror delustring detection method and detection device of the transmission-type visual range visibility meter of the present invention, is：
(1) design of three face-ports and three tunnel optical measuring systems for using U- types, can more accurately measure front form
Extinction coefficient value；
(2) three face-port components of U- types constitute a kind of gas channel up and down, the cleaning of window mirror together with the lens cap of front end
When protection air-flow passes through the channel from top to bottom, due to the side operative constraint diverging of air-flow in channel, enhance pair
The cleaning protection effect of form.
Description of the drawings
Fig. 1 is the window mirror delustring detection method and device schematic diagram of the transmission-type visual range visibility meter of the present invention.
In figure：
1. front form；2. the first side window；3. the second side window；4. first light source；5. the first lens；
6. the first speculum；7. the second lens；8. the first photodetector；9. second light source；10. the third lens；
11. the second speculum；12. the 4th lens；13. the second photodetector；14. the 4th light source；15. the 5th lens；
16. third speculum；17. the 4th speculum；18. the 6th lens；19. third photodetector；20. lens cap；
21. multi channel signals amplifier；22. modulus a/d transducer；23. microprocessor.
Specific implementation mode
Below in conjunction with drawings and examples, the present invention is described in detail.
The present invention provides a kind of window mirror delustring detection devices of transmission-type visual range visibility meter, and the detection device is such as
Shown in Fig. 1, including a three face-port component of U- types, three tunnel optical measuring systems, multi channel signals amplifier, modulus A/D conversions
Device, microprocessor and a lens cap.The three face-port component of U- types includes front form 1, the first side window 2 and the second side window
3；In the three tunnel optical measuring systems, first via optical measuring system includes first light source 4, the reflection of the first lens 5, first
Mirror 6, the second lens 7 and the first photodetector 8, the light that first light source 4 is sent out pass through the first lens 5,1 and of front form successively
First side window 2 is reflected by the first speculum 6, by being received by the first photodetector 8 after the second lens 7.Second road optics is surveyed
Amount system includes second light source 9, the third lens 10, the second speculum 11, the 4th lens 12 and the second photodetector 13, and second
The light that light source 9 is sent out passes through the third lens 10, front form 1 and the second side window 3 successively, is reflected, passes through by the second speculum 11
It is received by the second photodetector 13 after 4th lens 12.Third light path measuring system include third light source 14, the 5th lens 15,
Third speculum 16, the 4th speculum 17, the 6th lens 18 and third photodetector 19, the light that third light source 14 is sent out is successively
By the 5th lens 15, third speculum 16, the second side window 3 and the first side window 2, is reflected by the 4th speculum 17, pass through the 6th
It is received by third photodetector 19 after lens 18.The detection device further includes lens cap 20, multi channel signals amplifier
21, modulus a/d transducer 22 and microprocessor 23.Wherein, 20 center of lens cap is opened there are one circular through hole, for making
Visibility measurement light beam passes through.The lens cap center is opened there are one circular through hole, for making visibility measuring beam pass through；
Lens cap 20 is installed on the front end of three face-port component of U- types, is located at the incident direction side of visibility measurement light beam, with U- types three
Face-port component constitutes about one gas channel, for enhancing the constraint of the protection air-flow to passing through, to window mirror
Dust-proof and cleaning protection.Three tunnel optical measuring systems, multi channel signals amplifier, modulus a/d transducer and the microprocessor
Device is placed in the seal chamber of visibility meter.
Front form 1, the first side window 2 and second side window 3 is all made of planar wave glass, and shape can be square
Shape can also be circle, form three face-port components of U- types.Front form 1 is placed perpendicular to visibility measurement light beam, center
On the optical axis of visibility measurement light beam.First side window 2 and the second side window 3 are close to the both sides of front form 1, with front form
1 is mutually perpendicular to and contour placement, composition U- type structures.
The first light source 4 is visible white light LED light source, and first via optical measuring system is for measuring front form 1
With the delustring of the first side window 2；
First lens 5 are used for the collimation of measuring beam；
First speculum 6 is for measuring beam of transferring；
Second lens 7 are used to measuring beam focusing on the first photodetector 8；
First photodetector 8 is a silicon photodetector, for receiving measurement optical signal and being converted to light
Electric current output at most channel signal amplifier 21；
The second light source 9 is visible white light LED light source, and the second tunnel optical measuring system is for measuring front form 1
With the delustring of the second side window 3；
The third lens 10 are used for the collimation of measuring beam；
Second speculum 11 is for measuring beam of transferring；
4th lens 12 are used to measuring beam focusing on the second photodetector 13；
Second photodetector 13 is a silicon photodetector, for receiving measurement optical signal and being converted to light
Electric current output at most channel signal amplifier 21；
The third light source 14 is visible white light LED light source, and third road optical measuring system is for measuring the first side window 2
With the delustring of the second side window 3；
5th lens 15 are used for the collimation of measuring beam；
The third speculum 16 and the 4th speculum 17 is for measuring beam of transferring；
6th lens 18 are used to measuring beam focusing on third photodetector 19；
The third photodetector 19 is a silicon photodetector, for receiving measurement optical signal and being converted to light
Electric current output at most channel signal amplifier 21；
The multi channel signals amplifier 21 is an integrated signal amplifier for including three channels, for receiving the
One photodetector 8, the second photodetector 13 and 19 3 tunnel photo-signal of third photodetector are simultaneously converted to amplification
Analog voltage signal exports；
The modulus a/d transducer 22 is for being converted to the analog voltage signal that multi channel signals amplifier 21 exports
Digital voltage signal；
The microprocessor 23 is embedded 32 arm processor, is connected with modulus a/d transducer 22, is used for
Calculate the extinction coefficient of front form 1, storage and output data.
Based on the window mirror delustring detection device, the present invention also provides a kind of window mirrors of transmission-type visual range visibility meter to disappear
Light detection method includes the following steps：
The first step, the measurement of 2 delustring of front form 1 and the first side window.Visibility is completed in transmission-type visual range visibility meter
After measurement, while starting three tunnel delustring measuring systems of U- type window assemblies, the optical signal that first light source 4 is sent out is through the first lens
After 5 collimations, the first photoelectricity is focused on using the first speculum 6 and the second lens 7 by front form 1 and the first side window 2
Detector 8.The optical signal of reception is converted to electric signal and exports at most channel signal amplifier 21 by the first photodetector 8,
Multi channel signals amplifier 21 is amplified the analog voltage signal amplified, the analog voltage letter of amplification to the electric signal
Number digital signal is become by modulus a/d transducer 22, and exported to microprocessor 23, is denoted as light signal strength I12；
Second step, the measurement of 3 delustring of front form 1 and the second side window.The optical signal that second light source 9 is sent out is through the third lens
After 10 collimations, the second light is focused on using the second speculum 11 and the 4th lens 12 by front form 1 and the second side window 3
Electric explorer 13.The optical signal of reception is converted to electric signal and exports at most channel signal amplifier by the second photodetector 13
21, the analog voltage signal of amplification becomes digital signal by modulus a/d transducer 22, and exports to microprocessor 23, is denoted as
Light signal strength I13；
Third walks, the measurement of 3 delustring of the first side window 2 and the second side window.The optical signal that third light source 14 is sent out is saturating through the 5th
It is saturating using the 4th speculum 17 and the 6th by the second side window 3 and the first side window 2 after the collimation of mirror 15 and third speculum 16
Mirror 18 focuses on third photodetector 19.The optical signal of reception is converted to electric signal and exported by third photodetector 19
The analog voltage signal of at most channel signal amplifier 21, amplification becomes digital signal by modulus a/d transducer 22, and exports
To microprocessor 23, it is denoted as light signal strength I23；
4th step, the calculating of 1 extinction coefficient of front form.Microprocessor 23 is strong by the optical signal of three tunnel measuring system inputs
Angle value I12、I13、I23With the advance I for measuring calibration0Value input formula (1) is calculated, and the extinction coefficient of front form 1 is found out
Value σ1, and store and export.
Claims (4)
1. a kind of window mirror delustring detection device of transmission-type visual range visibility meter, it is characterised in that：The detection device includes one
Three face-port component of a U- types, three tunnel optical measuring systems, multi channel signals amplifier, modulus a/d transducer, microprocessor and one
A lens cap；The three face-port component of U- types includes front form, the first side window and the second side window；The three road optics are surveyed
Amount system is placed in the seal chamber of transmission-type visual range visibility meter, first via optical measuring system include first light source, first thoroughly
Mirror, the first speculum, the second lens and the first photodetector, the light that first light source is sent out lead to after the first collimated
Front form and the first side window are crossed, is reflected by the first speculum, light beam converges at the first photodetector by the second lens；The
Two tunnel optical measuring systems include second light source, the third lens, the second speculum, the 4th lens and the second photodetector, and
The light that two light sources are sent out, by front form and the second side window, is reflected, light beam after the third lens collimate by the second speculum
The second photodetector is converged at by the 4th lens；Third light path measuring system includes that third light source, the 5th lens, third are anti-
Penetrate mirror, the 4th speculum, the 6th lens and third photodetector, the light that third light source is sent out after the 5th collimated,
It is reflected, by the second side window and the first side window by third speculum, is then reflected by the 4th speculum, light beam passes through the 6th lens
Converge at third photodetector；The multi channel signals amplifier is an integrated signal amplification comprising three channels
Device, for receiving the first photodetector, the second photodetector and three tunnel photo-signal of third photodetector and converting
It is exported for the analog voltage signal of amplification；
The modulus a/d transducer is used to the analog voltage signal that multi channel signals amplifier exports being converted to digital voltage
Signal；
The microprocessor is embedded 32 arm processor, is connected with modulus a/d transducer, for calculating front
The extinction coefficient of form, storage and output data；
Front form, the first side window and second side window is all made of planar wave glass, and shape is rectangle or circle, composition
Three face-port components of U- types；Front form is placed perpendicular to visibility measurement light beam, and center is located at visibility measurement light beam
On optical axis；First side window and the second side window are mutually perpendicular to and contour placement, composition U- close to front form both sides with front form
Type structure.
2. a kind of window mirror delustring detection device of transmission-type visual range visibility meter according to claim 1, it is characterised in that：
The lens cap center is opened there are one circular through hole, for making visibility measuring beam pass through；Lens cap is installed on U- types three
The front end of face-port component is located at the incident direction side of visibility measurement light beam, and about one is constituted with three face-port component of U- types
Gas channel.
3. a kind of window mirror delustring detection device of transmission-type visual range visibility meter according to claim 1, it is characterised in that：
First light source, second light source and the third light source is all made of white LED light source.
4. a kind of window mirror delustring detection method of transmission-type visual range visibility meter, it is characterised in that：It is complete in visibility measurement process
At window mirror delustring detection is carried out later, specifically comprise the following steps,
The first step, optical signal are measured by the light signal strength after front form and the first side window；The light letter that first light source is sent out
Number the front form of U- type windows and the first side window is passed through to reach the first photodetector, after the optical signal amplified output measured
Intensity value is I12；
Second step, optical signal are measured by the light signal strength after front form and the second side window；The light letter that second light source is sent out
Number the front form of U- type windows and the second side window is passed through to reach the second photodetector, after the optical signal amplified output measured
Intensity value is I13；
Third walks, and optical signal is measured by the light signal strength after the first side window and the second side window；The light letter that third light source is sent out
Number two side windows of U- type windows is passed through to reach third photodetector, the intensity value after the optical signal amplified output measured is
I23；
4th step, the calculating of front form extinction coefficient；By the light signal strength value I of above-mentioned acquisition12、I13、I23It is measured with advance
The I of calibration0It is worth input microprocessor, is calculated by formula (1), find out the extinction coefficient value σ of front form1：
Wherein, x is distance of the optical signal by window mirror, I0It is that optical signal passes through the incident intensity before window mirror.
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| CN201610245604.1A CN105928881B (en) | 2016-04-20 | 2016-04-20 | A kind of the window mirror delustring detection method and detection device of transmission-type visual range visibility meter |
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| CN109804235B (en) * | 2016-11-30 | 2022-05-13 | 国立研究开发法人产业技术综合研究所 | Target substance detection device and target substance detection method |
| CN108956095A (en) * | 2018-05-17 | 2018-12-07 | 北京风云天地信息科技有限公司 | A kind of optical lens pollution level measurement method and device |
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