CN109520972A - A kind of stagewise visibility measurement method and device - Google Patents
A kind of stagewise visibility measurement method and device Download PDFInfo
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- CN109520972A CN109520972A CN201811475707.2A CN201811475707A CN109520972A CN 109520972 A CN109520972 A CN 109520972A CN 201811475707 A CN201811475707 A CN 201811475707A CN 109520972 A CN109520972 A CN 109520972A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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Abstract
Present disclose provides a kind of stagewise visibility measurement method and devices, comprising: according to visibility scale standard, sets each grade visibility critical value；It is cut algorithm according to light decay, adjusts the circuit parameter of each measuring circuit, keep circuit on state of each measuring circuit in different brackets visibility critical value different；On state result to each measuring circuit in different brackets visibility critical value encodes, and each coding represents a visibility scale；When measurement, according to coding result corresponding to measuring circuit on state, by visibility scale with the output of digital quantity result.The disclosure can realize stagewise digital quantity result output corresponding with visibility scale, compared with traditional analog formula continuous signal measurement method, have the characteristics of at low cost, measurement result is accurate, reliable, strong applicability.
Description
Technical field
This disclosure relates to a kind of stagewise visibility measurement method and device.
Background technique
Atmospheric visibility detection China's weather prognosis, environmental monitoring and in terms of have highly important work
With.Recently, the presence of the exacerbation of China's industrial pollution and extreme climate, so that China various regions are all to some extent by haze shadow
It rings.China has a vast territory, and mountain area is numerous and possesses longer coastline, and extremely low visibility day often occurs resulting in the greasy weather
Accident frequently occurs in the case of gas, and the monitoring capability for improving visibility is extremely urgent.
Currently, there are mainly two types of modes for the measurement of domestic bad weather visibility.One is the analyses of manual video graticule to survey
Amount, it is big by artifical influence factor, and real-time is poor；Another Professional Meteorological monitoring device, is sampled as analog signals, and measurement is set
It is standby to need periodic calibrating, and at high cost cut.The external processing method for also using scattering method and video pictures.But video overtreating
Dependent Algorithm in Precision causes human factor error excessive.Scattering method treatment process is cumbersome and the continuous analog pickup electrode of laser is utilized
Cost is increased greatly.
Atmospheric extinction coefficient is characterized using the scattering coefficient of light under certain angle of scattering different from scattering method, transmission beam method uses
The method of direct detection transmittance of atmosphere or extinction coefficient, structure is simple, more representative.But due to atmospheric transmission formula visibility
Instrument all has technical requirements more higher than scattering formula in terms of optical alignment and ground, domestic so far also without more mature
Atmospheric transmission visibility meter batch production.Given this stagewise greasy weather visibility monitoring system has been designed and developed.
Summary of the invention
In order to solve the deficiencies in the prior art, present disclose provides a kind of stagewise visibility measurement method and device, needles
To set visibility scale standard, by reasonably designing circuit parameter, it can be achieved that classification corresponding with visibility scale
The output of formula digital quantity result has at low cost compared with traditional analog formula continuous signal measurement method, and measurement result is accurate, can
It leans on, the characteristics of strong applicability.
To achieve the goals above, the technical solution of the disclosure is as follows:
A kind of stagewise visibility measurement method, including
According to visibility scale standard, each grade visibility critical value is set；
It is cut algorithm according to light decay, adjusts the circuit parameter of each measuring circuit, make each measuring circuit in different brackets visibility
Circuit on state when critical value is different；
On state result to each measuring circuit in different brackets visibility critical value encodes, and each coding represents
One visibility scale；
When measurement, according to coding result corresponding to measuring circuit on state, by visibility scale with digital quantity result
Output.
Further, the method for adjustment is to keep the transmitting terminal light source of each measuring circuit identical, receiving terminal circuit parameter
It is identical, the baseline length between each measuring circuit transmitting terminal and receiving end is adjusted, so that the baseline length pair of different measuring circuits
Answer different grades of visibility critical value.
Further, the method for adjustment is to keep the transmitting terminal circuit parameter of each measuring circuit identical, transmitting terminal with connect
Baseline length between receiving end is identical, adjusts each measuring circuit receiving end parameter, makes the critical value point of each receiving terminal circuit conducting
Different grades of visibility critical value is not corresponded to.
Further, the coding method be export under different visibility scales each measuring circuit on state signal and
Nonconducting state signal, is encoded according to output signal, and assigns corresponding visibility scale to each coding result.
A kind of stagewise visibility measurement device, including multiple transmitting terminals and receiving end, the transmitting terminal and receiving end one
One is corresponding, and the transmitting terminal light source is identical, and the receiving terminal circuit parameter is identical, between each transmitting terminal and receiving end
Baseline length respectively corresponds the critical value of a visibility scale, and the receiving end is connected with a host, and the host is used for root
Corresponding visibility scale result is exported according to the on state of each receiving end.
Further, the receiving end is photodiode, and the photodiode generates the minimum optical power value of electric current
It is identical.
Further, the corresponding coding result of each receiving end difference on state institute is equipped in the host, when connecing
When receiving end on state meets corresponding coding result, the host exports visibility corresponding to corresponding coding result etc.
Grade.
A kind of stagewise visibility measurement device, including multiple transmitting terminals and receiving end, the transmitting terminal and receiving end one
One is corresponding, and the transmitting terminal circuit parameter is identical, and the baseline length between the transmitting terminal and receiving end is identical, the receiving end
Circuit parameter is configured respectively according to the critical value of visibility scale, and the receiving end is connected with a host, and the host is used
According to the corresponding visibility scale result of the on state of each receiving end output.
Further, the receiving end is photodiode, and the photodiode generates the minimum optical power value of electric current
Meet the critical value of different visibility scales respectively.
Further, the corresponding coding result of each receiving end difference on state institute is equipped in the host, when connecing
When receiving end on state meets corresponding coding result, the host exports visibility corresponding to corresponding coding result etc.
Grade.
Compared with prior art, the beneficial effect of the disclosure is:
The disclosure is directed to set visibility scale standard, by reasonably designing circuit parameter, it can be achieved that and visibility
Grade corresponding stagewise digital quantity result output, compared with traditional analog formula continuous signal measurement method, have it is at low cost,
The characteristics of measurement result is accurate, reliable, strong applicability.
The digital classification greasy weather visibility detection system of the disclosure, can be shown in based on the switching characteristic determination of photodiode
Rate range is spent, has structure simple, at low cost, the accurate and reliable feature of measurement result.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the disclosure for different visibility scale parameters adjustment schematic diagram.
Specific embodiment
The disclosure is described further with specific embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In the disclosure, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ",
The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this public affairs
The relative for opening each component or component structure relationship and determination, not refers in particular to either component or element in the disclosure, cannot understand
For the limitation to the disclosure.
In the disclosure, term such as " affixed ", " connected ", " connection " be shall be understood in a broad sense, and indicate may be a fixed connection,
It is also possible to be integrally connected or is detachably connected；It can be directly connected, it can also be indirectly connected through an intermediary.For
The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the disclosure as the case may be,
It should not be understood as the limitation to the disclosure.
A kind of stagewise visibility measurement method, including
According to visibility scale standard, each grade visibility critical value is set；
It is cut algorithm according to light decay, adjusts the circuit parameter of each measuring circuit, make each measuring circuit in different brackets visibility
Circuit on state when critical value is different；
On state result to each measuring circuit in different brackets visibility critical value encodes, and each coding represents
One visibility scale；
When measurement, according to coding result corresponding to measuring circuit on state, by visibility scale with digital quantity result
Output.
Such as assume that each grade visibility critical value is respectively N1, N2 ... ..., Nn, N1 < N2 < N3 < ... < Nn is less than critical value
Visibility respectively represent different weather conditions, be greater than Nn indicate visibility good.
According to decay algorithm of the light under mist influence factor, the mist of various concentration is different to the attenuation of light, certain wave
Long light has certain light intensity and optical power when reaching receiving end under fixed range under corresponding visibility, work as optical power value
When reaching the minimum optical power that photodiode can be made to can produce electric current, circuit is connected, therefore, can be according to this feature to each
The circuit parameter of measuring circuit is adjusted, and makes circuit on state of each measuring circuit in different brackets visibility critical value
It is different.
As one embodiment 1, the method for adjustment is to keep the transmitting terminal light source of each measuring circuit identical, receiving end electricity
Road parameter is identical, adjusts the baseline length between each measuring circuit transmitting terminal and receiving end, so that the baseline of different measuring circuits
Length corresponds to different grades of visibility critical value.
The transmitting terminal and receiving terminal circuit standard parameter of i.e. each measuring circuit, according to different visibility scales to light intensity
Attenuation characteristic determines the baseline length under different visibility scales between transmitting terminal and receiving terminal, as shown in Figure 1, when each distance ginseng
Number adjustment after the completion of, meet S1 < S2 < ... < Sn.
As another embodiment 2, the method for adjustment is to keep the transmitting terminal circuit parameter of each measuring circuit identical, hair
The baseline length penetrated between end and receiving end is identical, adjusts each measuring circuit receiving end parameter, makes each receiving terminal circuit conducting
Critical value respectively corresponds different grades of visibility critical value.
The transmitting terminal circuit parameter of each measuring circuit standardizes, i.e. transmitting terminal light source is identical, receiving terminal circuit Parameter adjustable,
That is the trigger condition of receiving terminal circuit conducting is different, therefore can measure different grades of visibility, when measurement, in Fig. 1 it is each away from
Meet from parameter: S1=S2=...=Sn.
In practical application, the transmitting terminal and receiving end standard parameter of embodiment 1, different visibility scales are by adjustment process
It realizes, measurement result is accurate after the completion of adjustment, but adjusts difficult, and when use is related to two end signal alignment issues, vulnerable to wind and snow
Equal weather influence, and are not easy to solve；And baseline length is longer, occupied area is opposite to be increased, and scene instruction is difficult；Detection accuracy has
Rely in baseline length, investigative range is also influenced by baseline length.And embodiment 2 is relatively not high to alignment request, baseline length phase
To shorter, scene instruction is easier to, therefore, method used in more options embodiment 2.
The coding method is to export each measuring circuit on state signal and nonconducting state under different visibility scales
Signal is encoded according to output signal, and assigns corresponding visibility scale to each coding result.
Specifically, setting each measuring circuit on state signal as 1, being not turned on is 0, carries out binary coding, then shares n+1
Kind output result.
Such as select 50m-4000m as system detection range, critical value be respectively 50m, 200m, 500m, 1000m,
2000m, 4000m, the visibility scale represented are respectively that strong thick fog, thick fog, mist, middle mist, mist, visibility are medium, are greater than
4000 meters of expression visibility goods.As shown in Figure 1, n=6, N1=50m, N2=200m, N3=500m, N4=1000m in figure,
N5=2000m, N6=4000m.
As shown in table 1, each measuring circuit on state under each visibility scale is encoded.
Table 1
Binary coding result is converted into hexadecimal, corresponding to hexadecimal result be respectively 3FH, 1FH,
0FH, 07H, 03H, 01H and 00H, other combining forms indicate system fault condition.
Based on the above method, the disclosure additionally provides corresponding measuring device:
As one embodiment, a kind of stagewise visibility measurement device, including multiple transmitting terminals and receiving end, the hair
It penetrates end and receiving end to correspond, the transmitting terminal light source is identical, and the receiving terminal circuit parameter is identical, each transmitting terminal
Baseline length between receiving end respectively corresponds the critical value of a visibility scale, and the receiving end is connected with a host,
The host is used to export corresponding visibility scale result according to the on state of each receiving end.
The receiving end is photodiode, and the minimum optical power value that the photodiode generates electric current is identical.
The corresponding coding result of each receiving end difference on state institute is equipped in the host, when shape is connected in receiving end
When state meets corresponding coding result, the host exports visibility scale corresponding to corresponding coding result.
As another embodiment, a kind of stagewise visibility measurement device, including multiple transmitting terminals and receiving end, it is described
Transmitting terminal and receiving end correspond, and the transmitting terminal circuit parameter is identical, the base length between the transmitting terminal and receiving end
Spend identical, the receiving terminal circuit parameter is configured respectively according to the critical value of visibility scale, and the receiving end is main with one
Machine is connected, and the host is used to export corresponding visibility scale result according to the on state of each receiving end.
The receiving end is photodiode, and the minimum optical power value that the photodiode generates electric current meets not respectively
With the critical value of visibility scale.
The corresponding coding result of each receiving end difference on state institute is equipped in the host, when shape is connected in receiving end
When state meets corresponding coding result, the host exports visibility scale corresponding to corresponding coding result.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Although above-mentioned be described in conjunction with specific embodiment of the attached drawing to the disclosure, model not is protected to the disclosure
The limitation enclosed, those skilled in the art should understand that, on the basis of the technical solution of the disclosure, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within the protection scope of the disclosure.
Claims (10)
1. a kind of stagewise visibility measurement method characterized by comprising
According to visibility scale standard, each grade visibility critical value is set；
It is cut algorithm according to light decay, adjusts the circuit parameter of each measuring circuit, keep each measuring circuit critical in different brackets visibility
Circuit on state when value is different；
On state result to each measuring circuit in different brackets visibility critical value encodes, and each coding represents one
Visibility scale；
When measurement, according to coding result corresponding to measuring circuit on state, by visibility scale with the output of digital quantity result.
2. a kind of stagewise visibility measurement method as described in claim 1, which is characterized in that the method for adjustment is to keep
The transmitting terminal light source of each measuring circuit is identical, and receiving terminal circuit parameter is identical, adjust each measuring circuit transmitting terminal and receiving end it
Between baseline length so that the baseline length of different measuring circuit corresponds to different grades of visibility critical value.
3. a kind of stagewise visibility measurement method as described in claim 1, which is characterized in that the method for adjustment is to keep
The transmitting terminal circuit parameter of each measuring circuit is identical, and the baseline length between transmitting terminal and receiving end is identical, adjusts each measurement electricity
Road receiving end parameter makes the critical value of each receiving terminal circuit conducting respectively correspond different grades of visibility critical value.
4. a kind of stagewise visibility measurement method as described in claim 1, which is characterized in that the coding method is, defeated
Each measuring circuit on state signal and nonconducting state signal under different visibility scales out, are compiled according to output signal
Code, and corresponding visibility scale is assigned to each coding result.
5. a kind of stagewise visibility measurement device, which is characterized in that including multiple transmitting terminals and receiving end, the transmitting terminal and
Receiving end corresponds, and the transmitting terminal light source is identical, and the receiving terminal circuit parameter is identical, each transmitting terminal and reception
Baseline length between end respectively corresponds the critical value of a visibility scale, and the receiving end is connected with a host, the master
Machine is used to export corresponding visibility scale result according to the on state of each receiving end.
6. a kind of stagewise visibility measurement device as claimed in claim 5, which is characterized in that the receiving end is photoelectricity two
Pole pipe, the minimum optical power value that the photodiode generates electric current are identical.
7. a kind of stagewise visibility measurement device as claimed in claim 5, which is characterized in that be equipped in the host and respectively connect
The corresponding coding result of receiving end difference on state institute, when receiving end, on state meets corresponding coding result, institute
It states host and exports visibility scale corresponding to corresponding coding result.
8. a kind of stagewise visibility measurement device, which is characterized in that including multiple transmitting terminals and receiving end, the transmitting terminal and
Receiving end corresponds, and the transmitting terminal circuit parameter is identical, and the baseline length between the transmitting terminal and receiving end is identical, institute
It states receiving terminal circuit parameter to be configured respectively according to the critical value of visibility scale, the receiving end is connected with a host, institute
Host is stated for exporting corresponding visibility scale result according to the on state of each receiving end.
9. a kind of stagewise visibility measurement device as claimed in claim 8, which is characterized in that the receiving end is photoelectricity two
Pole pipe, the minimum optical power value that the photodiode generates electric current meet the critical value of different visibility scales respectively.
10. a kind of stagewise visibility measurement device as claimed in claim 8, which is characterized in that be equipped in the host each
The corresponding coding result of receiving end difference on state institute, when receiving end, on state meets corresponding coding result,
The host exports visibility scale corresponding to corresponding coding result.
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Application publication date: 20190326 |