CN109959638A - Quick accurate automatic aligning method and processing unit for transmission-type visibility meter - Google Patents
Quick accurate automatic aligning method and processing unit for transmission-type visibility meter Download PDFInfo
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- CN109959638A CN109959638A CN201711405404.9A CN201711405404A CN109959638A CN 109959638 A CN109959638 A CN 109959638A CN 201711405404 A CN201711405404 A CN 201711405404A CN 109959638 A CN109959638 A CN 109959638A
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- signal strength
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
- G01N21/61—Non-dispersive gas analysers
Abstract
The present invention relates to air detection technical fields, are especially used for the quick accurate automatic aligning method and processing unit of transmission-type visibility meter.This method is shifted one's position and is scanned by adjusting receiver or transmitter, obtain signal peak value point, in conjunction with the data symmetry for setting multiple and utilizing alignment scanning signal of peak point intensity, the determination of second position point and the third place point is fast implemented, finally obtain the position of collimating point, realize the calculating of best alignment position, quickly and effectively realize the alignment of transmitter and receiver, method simple practical, save the alignment time, and improve the accuracy and alignment success rate of alignment, the solution for solving collimation point in the prior art is complex, computational burden is larger, the higher problem of processing requirement.
Description
Technical field
The present invention relates to air detection technical fields, are especially accurately automatically aligned to for the quick of transmission-type visibility meter
Method and processing unit.
Background technique
Visibility is one of important elements of weather monitoring, for understanding air stability, judges property of air mass.Visibility
According between object brightness contrast or object can be seen, with one apart from the visible of upper conceptual description atmosphere
Degree, its accurate measurements suffer from meteorology, traffic, civil aviaton and agricultural production important directive significance.It is general in the world at present
There is transmission-type visibility meter all over the visibility meter used, scatters formula visibility meter and laser radar visibility meter.Transmission-type can be shown in
Degree instrument is also known as transmissometer or transmissometer, is divided into double-end type and monofocal, obtains visibility value by measurement atmospheric transmittance.It is double
End formula transilluminator irradiates tested sample at work, with optical transmitting set, and the light radiation after receiver measurement decaying passes through big gas sample
This transmitance calculates visibility value.The advantages of transmission-type visibility meter, is not having to make atmosphere any hypothesis with atmospheric sounding
Transmitance or extinction coefficient, sampling volume is big, and measurement accuracy is high.Since transilluminator measurement accuracy is high, it is widely used in machine
Field runway visibility measurement, but China makes there is presently no the transilluminator of entirely autonomous intellectual property and relevant calibration facility
It is the product of Visala company, Finland mostly.Although transilluminator precision is high, also there is its limitation, when atmospheric visibility compared with
When big, detection result is very sensitive to the pollution of the calibrated error of light source, the detecting error of transmitted light and camera lens, and needs
Longer baseline, takes up a large area.Therefore, when double-end type transilluminator is installed, artificial preliminary alignment will be carried out, mainly
By being compensated during visibility measurement since optical path collimates visibility measurement error caused by deviation.It is carried out in instrument
Before visibility measurement, by constantly looking for so that collimation position of the energy maximum position in receiving end as optical path.It should
Process is complex, and the time is longer.However in no matched calibration facility, it can only rely on after certain interval of time again
Secondary carry out manual-alignment, as a result, causing in next non-manual-alignment, due to external environment variation and instrument vibration etc.
Caused optical path transmitting-receiving is inconsistent and then detection accuracy is caused to decline.
Having Chinese patent publication No. is that the patent document of CN105510230A discloses a kind of transmission based on scanning mode
Instrument optical path automatic-aligning system in advance and method, a kind of transilluminator optical path automatic-aligning system based on scanning mode,
A unit, position are acquired in dynamic Unit two, location information including transmitting unit, light source control unit, motor driven Unit one, motor
Set information collection Unit two, central processing unit Unit one, receiving unit, intensity signal acquisition unit, motor driven Unit three, electricity
Machine drives Unit four, location information to acquire Unit three, location information acquisition Unit four, central processing unit Unit two and master control list
Member；The transmitting unit includes LED light source and transmitting optical module, carries out visibility measurement for transilluminator and optical path is quasi-
It is straight that detection light beam is provided；The LED light source when light source control unit is used to drive hair in unit guarantees that light source luminescent is stablized
Property；The position adjustment that motor driven Unit one is used to that transmitting unit is driven to carry out horizontal direction；The motor driven
The position adjustment that Unit two are used to that transmitting unit is driven to carry out vertical direction.
Wherein carry out the position of ± 0.2 ° of range in either the vertical or horizontal direction by control transmitting unit or receiving unit
Rotation, while the intensity signal in record position information and scanning process, since rotation angle is smaller, if at 0 ° of initial position
When, the reception light intensity very little of measurement, by ± 0.2 ° of range of scanning, be difficult to filter out the maximum value W for receiving light intensity and
Intensity signal between 0.6W and 0.4W, so being also just difficult to find that collimation position, this mode success rate is lower.If
Guarantee scanning to light intensity maximum value W, and light intensity minimum value 0.4W is received, then needs to increase scanning range, while
It will increase a large amount of variable data, will increase the storage and computational burden of central processing unit in this way.
Summary of the invention
The object of the present invention is to provide the quick accurate automatic aligning method and processing unit for transmission-type visibility meter,
To solve the problems, such as that the solution of collimation point in the prior art is complex, computational burden is larger, processing requirement is higher.
To achieve the above object, the present invention provides a kind of quick accurate side of being automatically aligned to for transmission-type visibility meter
Method, including following methods technical solution:
Method scheme one: a kind of quick accurate automatic aligning method for transmission-type visibility meter is controlled along X-axis tune
Save receiver or transmitter, comprising the following steps:
1) the received initial received signal strength information of receiver institute of current location point is obtained；
2) adjust receiver or transmitter make in the horizontal direction or the direction initialization of vertical direction with the first setting step-length into
Row scanning, until received signal strength is first position point corresponding to the first setting multiple of initial received signal strength；
3) receiver or transmitter are adjusted using first position point as starting point, makes the opposite direction along the direction initialization with institute
It states the first setting step-length and is scanned and obtains received signal strength peak value, until second position point, second position point chooses item
Part is the second setting multiple that second position point received signal strength is received signal strength peak value；
4) receiver or transmitter are adjusted using second position point as starting point, make along direction initialization with the second setting step-length into
Row scanning, until the third place point, it is that the third place point received signal strength is equal to described second that the third place point, which chooses condition,
The corresponding received signal strength of location point；
5) intermediate position points of selection second position point and the third place point are the collimating point of horizontal direction or vertical direction,
Receiver or transmitter are adjusted to collimating point.
Beneficial effect is that this method scheme one is shifted one's position and is scanned by adjusting receiver or transmitter, obtains letter
Number peak point, in conjunction with peak point intensity setting multiple and using the data symmetry of alignment scanning signal, fast implemented the
The determination of two location points and the third place point, finally obtains the position of collimating point, realizes the calculating of best alignment position, quickly
The alignment of transmitter and receiver is effectively realized, method simple practical saves the alignment time, and improves alignment
Accuracy and alignment success rate, the solution for solving collimation point in the prior art is complex, computational burden is larger, processing is wanted
Seek higher problem.
Method scheme two: on the basis of method scheme one, the first setting step-length is greater than the second setting step-length.
Method scheme three: on the basis of method scheme one or method scheme two, described first sets multiple as 0.9.
Method scheme four: on the basis of method scheme three, described second sets multiple as 0.9.
The present invention, which provides, a kind of is accurately automatically aligned to processing unit, including following dress for the quick of transmission-type visibility meter
Set technical solution:
Device scheme one: a kind of to be accurately automatically aligned to processing unit, including transmitting for the quick of transmission-type visibility meter
The motor of horizontal direction and/or vertical direction is provided on device, receiver and controller, the transmitter and the receiver,
The motor of controller controlled level direction and/or vertical direction adjusts receiver or transmitter, performs the steps of
1) the received initial received signal strength information of receiver institute of current location point is obtained；
2) adjust receiver or transmitter make in the horizontal direction or the direction initialization of vertical direction with the first setting step-length into
Row scanning, until received signal strength is first position point corresponding to the first setting multiple of initial received signal strength；
3) receiver or transmitter are adjusted using first position point as starting point, makes the opposite direction along the direction initialization with institute
It states the first setting step-length and is scanned and obtains received signal strength peak value, until second position point, second position point chooses item
Part is the second setting multiple that second position point received signal strength is received signal strength peak value；
4) receiver or transmitter are adjusted using second position point as starting point, make along direction initialization with the second setting step-length into
Row scanning, until the third place point, it is that the third place point received signal strength is equal to described second that the third place point, which chooses condition,
The corresponding received signal strength of location point；
5) intermediate position points of selection second position point and the third place point are the collimating point of horizontal direction or vertical direction,
Receiver or transmitter are adjusted to collimating point.
Device scheme two: on the basis of device scheme one, the first setting step-length is greater than the second setting step-length.
Device scheme three: on the basis of device scheme one or device scheme two, described first sets multiple as 0.9.
Device scheme four: on the basis of device scheme three, described second sets multiple as 0.9.
Detailed description of the invention
Fig. 1 is a kind of transmission-type visibility meter optical path schematic diagram；
Fig. 2 is a kind of quick accurate automatic aligning method for transmission-type visibility meter；
Fig. 3 is X-axis position where receiver and the relational graph for receiving signal.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
Transmission-type visibility meter is made of transmitter and receiver, and transmitter emits a branch of green-yellow light, and receiver receives
Light that transmitter launches, the decaying by measuring optical signal transmissive calculate atmospheric transmittance, according to atmospheric transmittance come
Inverting atmospheric visibility.As shown in Figure 1, including transmitter 1, receiver 2, LED 3, energy measuring photodiode 4, emitting thoroughly
Mirror 5, launch window glass 6 receive light bar 7, receive photodiode 8, receive optical filter 9, receiving lens 10, receive window glass
Glass 11, angle of flare 12 and field angle 13, wherein transmission-type visibility meter alignment include four shaft alignements, including receiver X-axis,
Receiver Y-axis, transmitter X-axis and the alignment of transmitter Y-axis, wherein X-axis is horizontal direction axis, Y-axis is vertical direction axis, four axis
Alignment it is the same, transmission-type visibility meter alignment when, receiving end measurement signal it is most strong, if transmitter and reception
Device deviation is bigger, and the signal of receiver measurement will be smaller, and since the light of transmitter transmitting is cylindrical light beam, and light is equal
Even property is preferable, and therefore, the present invention provides a kind of quick accurate automatic aligning method for transmission-type visibility meter, and this method is suitable
For receiver and transmitter to be adjusted, the present invention is illustrated by taking the alignment of receiver X-axis and Y-axis alignment as an example, such as Fig. 2
Shown, controller controls and receives the motor on the X axis of device and adjusts the corresponding scanning work of receiver progress first, including following
Step:
1) receiver obtains the initial received signal strength information of current location point, is set as location A point.
2) adjusting receiver makes to be scanned along direction initialization with the first setting step-length, until received signal strength is initial
B location point corresponding to first setting multiple of received signal strength.
Wherein the first setting step-length can be adjusted according to actual needs, guarantee faster scanning speed, if location A point pair
The signal strength answered is QA, then 0.9 times of Q can receivedASignal when stop, obtaining corresponding B location point.
3) receiver is adjusted using B location point as starting point, carries out the opposite direction along direction initialization with the first setting step-length
It scans and obtains received signal strength peak value QC, until received signal strength is the second setting multiple of received signal strength peak value
Corresponding D location point.
It controls and receives device to be adjusted using B location point as starting point along the opposite direction in former direction, adjusting step-length can basis
Demand is adjusted, and the intensity for receiving signal to each obtained in adjustment process is compared, and obtains signal strength peak value
Location point C and its corresponding peak intensities values QC, continue to adjust until obtaining 0.9 times of QCCorresponding D location point.
4) receiver is adjusted using B location point as starting point, makes to be scanned along direction initialization with the second setting step-length, until
E location point, it is that D location point received signal strength is equal to the corresponding reception signal of the second position point that E location point, which chooses condition,
Intensity.
Using the light source characteristic of transmitter, if light source uniformity is preferable and is cylindrical light beam, therefore can according to symmetry
Know, the received signal strength of E location point is equal with the received signal strength of D location point.Wherein second setting step-length according to
Demand is configured, and preferentially meets higher scanning accuracy.
In practical application, it is a kind of slow scanning process that the second setting step value is smaller；Due to the job specification of motor,
In motor stalls, shaft can be unstable, therefore in order to reduce the unstable influence of shaft, is given by corresponding elastic component
The certain active force of shaft, so that occur that shaft will not again when motor reduces direction rotation stopping suddenly to turned position
Deflection, wherein turned position is the parameter that motor itself defines.
5) intermediate position points of D location point and E location point are chosen as the collimating point on X axis, adjust receiver to standard
Straight point.
According to D location point and E location point, determine that point F point is the collimating point in X-axis among it.
It then, is starting point according to the collimating point in X-axis, then edge and the axis of X-axis vertical direction are that Y-axis is scanned,
Obtain the collimating point in corresponding Y-axis, as final collimating point.
The present invention provides a kind of process that the above method is implemented, and is further illustrated according to position and signal strength relationship, such as
Shown in Fig. 3, if current bin X-axis motor, at the A of position, receiver controls the motor of X-axis from initial position A to position
Increased direction is quickly scanned, and until measuring signal is reduced to 90% (B point) of the measuring signal of position A point, controls and receives device X
The motor of axis is reversed adjusting, and the direction reduced to position is quickly scanned, until the signal that receiver receives is maximum letter
90% (the D point) of number (C point)；Then receiver X-axis motor starts to scan with low speed to the increased direction in position, since D point,
Until the symmetric position E point equal with D point signal, the position of E point is recorded at this time, and the mean place F point between D point and E point is
For the alignment point of receiving end X-axis.
The key being aligned above is to guarantee the accuracy of D point and E point, just can guarantee the accuracy of F point, that is, essence in this way
True alignment point, it is ensured that the accuracy of D point and E point, it is necessary in D point to slow scanning is used when flying-spot scan, i.e., with small step-length
It is adjusted.
Specific embodiment of the present invention is presented above, but the present invention is not limited to described embodiment.
Under the thinking that the present invention provides, to the skill in above-described embodiment by the way of being readily apparent that those skilled in the art
Art means are converted, are replaced, are modified, and play the role of with the present invention in relevant art means it is essentially identical, realize
Goal of the invention it is also essentially identical, the technical solution formed in this way is to be finely adjusted to be formed to above-described embodiment, this technology
Scheme is still fallen in protection scope of the present invention.
Claims (8)
1. a kind of quick accurate automatic aligning method for transmission-type visibility meter, which is characterized in that control is along level side
To or vertical direction adjust receiver or transmitter, comprising the following steps:
1) the received initial received signal strength information of receiver institute of current location point is obtained；
2) it adjusts receiver or transmitter makes in the horizontal direction or the direction initialization of vertical direction is swept with the first setting step-length
It retouches, until received signal strength is first position point corresponding to the first setting multiple of initial received signal strength；
3) receiver or transmitter are adjusted using first position point as starting point, makes the opposite direction along the direction initialization with described the
One setting step-length is scanned and obtains received signal strength peak value, until second position point, second position point chooses condition and is
Second position point received signal strength is the second setting multiple of received signal strength peak value；
4) receiver or transmitter are adjusted using second position point as starting point, makes to be swept along direction initialization with the second setting step-length
It retouches, until the third place point, it is that the third place point received signal strength is equal to the second position that the third place point, which chooses condition,
The corresponding received signal strength of point；
5) intermediate position points of second position point and the third place point are chosen as the collimating point of horizontal direction or vertical direction, are adjusted
Receiver or transmitter are to collimating point.
2. the quick accurate automatic aligning method according to claim 1 for transmission-type visibility meter, which is characterized in that
The first setting step-length is greater than the second setting step-length.
3. the quick accurate automatic aligning method according to claim 1 or 2 for transmission-type visibility meter, feature exist
In described first sets multiple as 0.9.
4. the quick accurate automatic aligning method according to claim 3 for transmission-type visibility meter, which is characterized in that
Described second sets multiple as 0.9.
5. a kind of be accurately automatically aligned to processing unit for the quick of transmission-type visibility meter, which is characterized in that including transmitter,
The motor of horizontal direction and/or vertical direction is provided on receiver and controller, the transmitter and/or the receiver,
The motor of controller controlled level direction and/or vertical direction adjusts receiver or transmitter, performs the steps of
1) the received initial received signal strength information of receiver institute of current location point is obtained；
2) it adjusts receiver or transmitter makes in the horizontal direction or the direction initialization of vertical direction is swept with the first setting step-length
It retouches, until received signal strength is first position point corresponding to the first setting multiple of initial received signal strength；
3) receiver or transmitter are adjusted using first position point as starting point, makes the opposite direction along the direction initialization with described the
One setting step-length is scanned and obtains received signal strength peak value, until second position point, second position point chooses condition and is
Second position point received signal strength is the second setting multiple of received signal strength peak value；
4) receiver or transmitter are adjusted using second position point as starting point, makes to be swept along direction initialization with the second setting step-length
It retouches, until the third place point, it is that the third place point received signal strength is equal to the second position that the third place point, which chooses condition,
The corresponding received signal strength of point；
5) intermediate position points of second position point and the third place point are chosen as the collimating point of horizontal direction or vertical direction, are adjusted
Receiver or transmitter are to collimating point.
6. according to claim 5 be accurately automatically aligned to processing unit, feature for the quick of transmission-type visibility meter
It is, the first setting step-length is greater than the second setting step-length.
7. according to claim 5 or 6 be accurately automatically aligned to processing unit for the quick of transmission-type visibility meter, special
Sign is that described first sets multiple as 0.9.
8. according to claim 7 be accurately automatically aligned to processing unit, feature for the quick of transmission-type visibility meter
It is, described second sets multiple as 0.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711405404.9A CN109959638A (en) | 2017-12-22 | 2017-12-22 | Quick accurate automatic aligning method and processing unit for transmission-type visibility meter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711405404.9A CN109959638A (en) | 2017-12-22 | 2017-12-22 | Quick accurate automatic aligning method and processing unit for transmission-type visibility meter |
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Cited By (2)
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| CN111855633A (en) * | 2020-08-21 | 2020-10-30 | 中国科学院长春应用化学研究所 | Rapid automatic accurate alignment system for steady-state transient fluorescence spectrum measurement technology and control method |
| CN113916841A (en) * | 2021-11-12 | 2022-01-11 | 北京聚恒博联科技有限公司 | Transmission-type visibility meter based on surface light source emission and array reception |
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Application publication date: 20190702 |