CN104984976B - A kind of vent cabinet windowing area measuring method and device and a kind of controller - Google Patents
A kind of vent cabinet windowing area measuring method and device and a kind of controller Download PDFInfo
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- CN104984976B CN104984976B CN201510438528.1A CN201510438528A CN104984976B CN 104984976 B CN104984976 B CN 104984976B CN 201510438528 A CN201510438528 A CN 201510438528A CN 104984976 B CN104984976 B CN 104984976B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/28—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring areas
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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Abstract
The present invention provides a kind of vent cabinet windowing area measuring method and device and a kind of controller, and methods described includes：It is sticked on the removable frame of vent cabinet window for determining the default picture of the position of removable frame, and in the provided opposite image capture module of vent cabinet window；Image of the vent cabinet window when window aperture is maximum and when window aperture is minimum is gathered respectively, and determines window maximum pixel position and window minimum pixel position according to the barycentric coodinates that picture is preset in respective image；The barycentric coodinates of picture are preset in determining realtime graphic, and the barycentric coodinates according to default picture and the default picture for prestoring determine the real-time window pixel position of vent cabinet window；The real-time windowing area of vent cabinet window is determined according to real-time window pixel position, maximum windowing area, window maximum pixel position and window minimum pixel position.The present invention can effectively measure the windowing size of the vent cabinet of left and right windowing and special-shaped window, beneficial to the intellectuality of vent cabinet.
Description
Technical field
The present invention relates to industrial ventilation technical field, particularly vent cabinet technical field, specially a kind of vent cabinet windowing
Area measurement method and device and a kind of controller.
Background technology
Laboratory ventilation is an indispensable part in lab design.In order that laboratory worker is not
Should have good in sucking or swallowing the not clear chemical substance of some poisonous, can causing a disease or toxicity and organism, laboratory
Ventilation.To prevent the absorption of some steams, gas and particulate (smog, coal smoke, dust and aerosol), polluter must be with ventilation
The method of cabinet, ventilator cowling or local ventilation is removed.Vent cabinet is the most frequently used a kind of intermittent local ventilation in laboratory, and species is numerous
Many, as its structure is different, the condition for using is different, and its exhaust effect is also differed.The good ring of the performance of vent cabinet, mainly depends on
In the speed moved by vent cabinet air.It is the pernicious gas produced during discharge is tested using the maximum purpose of vent cabinet, protects
The health of shield experimenter, that is to say, that the security had by height and superior operability.As vent cabinet is in biochemical test
Occupy very important position in room, from improving laboratory environment, improving labour health condition, improve the aspects such as operating efficiency and examine
Consider, the use number of units of vent cabinet increases by leaps and bounds.The thing followed is ventilation shaft, and pipe arrangement, distribution, air draft etc. all become experiment
The important topic that room is built.In the airflow apparatus of laboratory, air-volume-variable fume hood is that the face wind speed for keeping safety carries out variable air rate control
System.
The vent cabinet windowing size of generally upper dropping window is the size by installing the measurement windowing of drag-line distance measuring sensor,
But there is the vent cabinet of left and right windowing and special-shaped window on the market simultaneously, it is impossible to surveyed by installing drag-line distance measuring sensor
Amount.
The content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of measurement of vent cabinet windowing area
Method and apparatus and a kind of controller, for solving to measure left and right windowing in prior art with the vent cabinet of special-shaped window
The problem of windowing size.
For achieving the above object and other related purposes, the present invention provides a kind of vent cabinet windowing area measuring method, institute
Stating vent cabinet windowing area measuring method includes：It is sticked on the removable frame of the vent cabinet window described removable for determining
The default picture of the position of dynamic frame, and the image in the provided opposite image that can gather whole vent cabinet window of vent cabinet window adopts
Collection module；Image of the vent cabinet window when window aperture is maximum and when window aperture is minimum is gathered respectively, and according to vent cabinet window
When window aperture is maximum and when window aperture is minimum, each the barycentric coodinates of the default picture determine window highest in image
Location of pixels and window minimum pixel position；The realtime graphic of collection vent cabinet window, determines
The barycentric coodinates of picture, and the barycentric coodinates according to the default picture and the described default picture for prestoring determine the vent cabinet
The real-time window pixel position of window；According to the maximum of the real-time window pixel position, vent cabinet window when window aperture is maximum
Windowing area, the window maximum pixel position and the window minimum pixel position determine the real-time windowing of the vent cabinet window
Area.
As a preferred embodiment of the present invention, according to the barycentric coodinates and the described default figure for prestoring of the default picture
Piece determines that the real-time window pixel position of the vent cabinet window specifically includes：Obtain the realtime graphic and from the realtime graphic
The middle Feature Descriptor for extracting the region for covering the default picture；By the Feature Descriptor extracted from the realtime graphic with
The Feature Descriptor extracted from the default picture for prestoring matches and stores the characteristic point that matches；According to the feature for matching
The barycentric coodinates of point determine the real-time window pixel position of the vent cabinet window.
As a preferred embodiment of the present invention, it is described according to the real-time window pixel position, vent cabinet window in window
Maximum windowing area, the window maximum pixel position and window minimum pixel position when aperture is maximum determines described logical
A kind of formula expression-form of the real-time windowing area of wind cabinet window is：
S=H × W
Wherein, Ss is real-time windowing area, and S is maximum windowing area, and P is real-time window pixel position, and Pmax is window
Maximum pixel position, Pmin are window minimum pixel position, and height of the H for vent cabinet window, W are the width of vent cabinet window.
Used as a preferred embodiment of the present invention, the default picture is bar code paster.
For achieving the above object, the present invention also provides a kind of vent cabinet windowing area measurement apparatus, the vent cabinet windowing
Area measuring device includes：Picture locating module, comprising a default picture, is attached at the removable frame of the vent cabinet window
On, for determining the position of the removable frame；Image capture module, is installed in the opposite of vent cabinet window, whole for gathering
The image of individual vent cabinet window；Image processing module, is connected with described image acquisition module, including：Image acquisition unit, for from
Described image acquisition module obtains the image of vent cabinet window；Memory cell, is connected with described image acquiring unit, for storing root
According to vent cabinet window, when window aperture is maximum and when window aperture is minimum, each the barycentric coodinates of the default picture are true in image
Fixed window maximum pixel position and window minimum pixel position and the default picture；Scan picture unit, with institute
State image acquisition unit to be connected, described in the realtime graphic for the vent cabinet window gathered according to image capture module, preset picture
Barycentric coodinates and the described default picture that prestores determine the real-time window pixel position of the vent cabinet window；Real-time windowing area
Acquiring unit, is connected with the memory cell and the scan picture unit, for according to the real-time window pixel position
Put, maximum windowing area of the vent cabinet window when window aperture is maximum, the window maximum pixel position and the window it is minimum
Location of pixels determines the real-time windowing area of the vent cabinet window.
Used as a preferred embodiment of the present invention, the scan picture unit includes：It is single that Feature Descriptor extracts son
Unit, is connected with described image acquiring unit and the memory cell respectively, is covered for the extraction from the realtime graphic described
The Feature Descriptor in the region of default picture the Feature Descriptor extracted from the default picture for prestoring；Coupling subelement, with
The Feature Descriptor extracts subelement and is connected, and the Feature Descriptor for extracting from the realtime graphic is pre- with from what is prestored
If the characteristic point that the Feature Descriptor extracted in picture is matched and matched by the memory cell storage；Real-time window picture
Plain position acquisition subelement, is connected with the coupling subelement and the memory cell respectively, for according to the feature for matching
The barycentric coodinates of point determine the real-time window pixel position of the vent cabinet window.
As a preferred embodiment of the present invention, in the real-time windowing area acquiring unit, the vent cabinet is determined
A kind of formula expression-form of the real-time windowing area of window is：
S=H × W
Wherein, Ss is real-time windowing area, and S is maximum windowing area, and P is real-time window pixel position, and Pmax is window
Maximum pixel position, Pmin are window minimum pixel position, and height of the H for vent cabinet window, W are the width of vent cabinet window.
Used as a preferred embodiment of the present invention, the default picture is bar code paster.
Used as a preferred embodiment of the present invention, described image acquisition module is imageing sensor or camera.
For achieving the above object, the present invention also provides a kind of controller, and the controller includes vent cabinet as above
Image processing module in windowing area measurement apparatus, the controller are connected with the executing agency of control vent cabinet air quantity, institute
The real-time windowing area for stating the vent cabinet window that image processing module is obtained by controller is sent to the executing agency, so that institute
State executing agency to be adjusted the air quantity of vent cabinet according to the real-time windowing area of vent cabinet window.
As described above, a kind of vent cabinet windowing area measuring method and device and a kind of controller of the present invention, have
Following beneficial effect：
1st, the present invention is sticked for determining the position of the removable frame on the removable frame of the vent cabinet window
Default picture, and vent cabinet window provided opposite can gather whole vent cabinet window image image capture module, pass through
The position of default picture determines the real-time windowing area of the vent cabinet window, by windowing area data is activation to executing agency, right
Air quantity is adjusted, so the present invention can carry out the measurement of contactless windowing area, nothing in effectively solving prior art
The problem of the windowing size of the vent cabinet of method measurement left and right windowing and special-shaped window.
2nd, the present invention instead of the sensor of traditional contact, with extensive autgmentability, be conducive to vent cabinet and
The intellectuality in laboratory.
3rd, the present invention is easy for installation, with stronger versatility and practicality.
Description of the drawings
Fig. 1 is shown as a kind of schematic flow sheet of vent cabinet windowing area measuring method of the present invention.
Fig. 2 is shown as on the vent cabinet of the present invention schematic diagram for installing image capture module and default picture.
Fig. 3 determines the stream of real-time window pixel position in being shown as a kind of vent cabinet windowing area measuring method of the present invention
Journey schematic diagram.
Fig. 4 is shown as a kind of structural representation of vent cabinet windowing area measurement apparatus of the present invention.
Fig. 5 is shown as the structure of scan picture unit in a kind of vent cabinet windowing area measurement apparatus of the present invention and shows
It is intended to.
Fig. 6 is shown as a kind of structural representation of controller of the present invention.
Component label instructions
1 vent cabinet windowing area measurement apparatus
11 picture locating modules
111 default pictures
12 image capture modules
13 image processing modules
131 image acquisition units
132 memory cell
133 scan picture units
133a Feature Descriptors extract subelement
133b coupling subelements
The real-time window pixel position acquisition subelements of 133c
134 real-time windowing area acquiring units
2 vent cabinets
3 vent cabinet windows
4 controllers
S1～S4 steps
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Refer to Fig. 1 to Fig. 6.It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only to
Coordinate the content disclosed in specification, so that those skilled in the art understands and reads, being not limited to the present invention can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where effect that can be generated of the invention and the purpose that can be reached is not affected, still all should fall in disclosed skill
In the range of art content is obtained and can be covered.Meanwhile, in this specification it is cited as " on ", D score, "left", "right", " centre " and
The term of " one " etc., is merely convenient to understanding for narration, and is not used to limit enforceable scope of the invention, its relativeness
It is altered or modified, under without essence change technology contents, when being also considered as enforceable category of the invention.
It is an object of the invention to provide a kind of vent cabinet windowing area measuring method and device and a kind of controller, use
The windowing size of the vent cabinet of left and right windowing and special-shaped window cannot be measured in prior art is solved the problems, such as.Explained in detail below
The principle and embodiment of a kind of vent cabinet windowing area measuring method and device and a kind of controller of the present invention are stated, this is made
Art personnel do not need creative work to be appreciated that a kind of vent cabinet windowing area measuring method and device of the present invention
And a kind of controller.
The present embodiment provides a kind of vent cabinet windowing area measuring method and device and a kind of controller, its main feature
It is to be found a view to adjusting window by camera, the image of acquisition is processed within a processor, with the image that is input into
Unique picture residing for relative position as output result, it is determined that windowing position, so as to know vent cabinet windowing area, will open
The area data of window is sent to executing agency, and air quantity is adjusted.The present embodiment is not singly applied to the logical of the upper dropping window of measurement
The windowing area of wind cabinet, is also applied for measuring the windowing area of left and right windowing and the vent cabinet of special-shaped window.The present embodiment instead of
The sensor of traditional contact, with extensive autgmentability, is conducive to the intellectuality in vent cabinet and laboratory.
As shown in figure 1, the present embodiment provides a kind of vent cabinet windowing area measuring method, specifically, in the present embodiment,
The vent cabinet windowing area measuring method is comprised the following steps.
Step S1, is sticked for determining the position of the removable frame on the removable frame of the vent cabinet window
Default picture, and vent cabinet window provided opposite can gather whole vent cabinet window image image capture module.Such as Fig. 2 institutes
Show, divulge information, the schematic diagram of image capture module 12 and default picture 111 is installed on 2.Wherein, in the present embodiment, specifically,
Described image acquisition module 12 can be imageing sensor or camera.The default picture 111 is bar code paster or other tools
There is the feature image of certain feature.That is, in the present embodiment, image capture module 12 is installed on the inside of vent cabinet 2 so as to
Whole vent cabinet can be gathered and adjust window, window edge is adjusted in vent cabinet and stick feature image to be positioned.
Step S2, gathers image of the vent cabinet window 3 when window aperture is maximum and when window aperture is minimum respectively, and according to
Vent cabinet window 3 when window aperture is maximum and when window aperture is minimum each in image the default picture 111 barycentric coodinates
Determine window maximum pixel position and window minimum pixel position.
In the present embodiment, according to vent cabinet window 3 when window aperture is maximum and when window aperture is minimum each in image
The barycentric coodinates of the default picture 111 determine the detailed process of window maximum pixel position and window minimum pixel position such as
Under.
By 3 mouthfuls of width W input picture acquisition modules of vent cabinet window, vent cabinet window 3 will be adjusted, make 3 mouthfuls of passes of vent cabinet window
To minimum, window picture now is absorbed, stored as the first calibration picture, then will adjust vent cabinet window 3 makes ventilation
3 mouthfuls of cabinet window is opened and puts extreme higher position under working condition, absorbs window picture now, is stored as the second calibration picture,
Measure and be input into correspondence window open height H.
According to the first calibration picture for being stored and the second calibration picture, using the first calibration picture and the second calibration picture
In the barycentric coodinates of respective default picture 111 determine window minimum pixel position Pmin and window maximum pixel position Pmax.
Step S3, gathers the realtime graphic of vent cabinet window 3, determines the weight that picture 111 is preset described in the realtime graphic
Heart coordinate, and the barycentric coodinates according to the default picture 111 and the described default picture 111 for prestoring determine the vent cabinet window
3 real-time window pixel position.I.e. when windowing is in normal operation position, window picture is absorbed, according to the window for now absorbing
The barycentric coodinates that picture 111 is preset in mouth picture determine that window pixel position is P.
In the present embodiment, specifically, as shown in figure 3, according to barycentric coodinates and the institute for prestoring of the default picture 111
State default picture 111 and determine that the real-time window pixel position of the vent cabinet window 3 specifically includes：Obtain the realtime graphic and from
The Feature Descriptor in the region for covering the default picture 111 is extracted in the realtime graphic；To carry from the realtime graphic
The Feature Descriptor for taking and the Feature Descriptor extracted from the default picture 111 for prestoring match and store the feature that matches
Point；The real-time window pixel position of the vent cabinet window 3 is determined according to the barycentric coodinates of the characteristic point for matching.
Furtherly, institute is determined according to the barycentric coodinates and the described default picture 111 for prestoring of the default picture 111
The real-time window pixel position for stating vent cabinet window 3 specifically includes：Identification object image is obtained, extracts special from captured image
Description is levied, and with certain form storage Feature Descriptor.Meanwhile, the feature for extracting the described default picture 111 for prestoring is retouched
Son is stated, the Feature Descriptor obtained from two width images is matched, store the characteristic point of matching, matched according to basis
The barycentric coodinates of characteristic point determine the real-time window pixel position of the vent cabinet window 3.
Step S4, according to the maximum windowing face of the real-time window pixel position, vent cabinet window 3 when window aperture is maximum
Long-pending, described window maximum pixel position and the window minimum pixel position determine the real-time windowing area of the vent cabinet window 3.
Specifically, in the present embodiment, it is described according to the real-time window pixel position, vent cabinet window 3 in window aperture
Maximum windowing area, the window maximum pixel position and window minimum pixel position when maximum determines the vent cabinet
A kind of formula expression-form of the real-time windowing area of window 3 is：
S=H × W
Wherein, Ss is real-time windowing area, and S is maximum windowing area, and P is real-time window pixel position, and Pmax is window
Maximum pixel position, Pmin are window minimum pixel position, and height of the H for vent cabinet window, W are the width of vent cabinet window.
Maximum windowing area S=H × W, then actual windowing area beFinally will be resulting
Windowing area information be sent to the executing agency of control vent cabinet air quantity, by the executing agency according to the reality of vent cabinet window 3
When windowing area the air quantity of vent cabinet 2 is adjusted.
To realize a kind of measuring method of above-mentioned vent cabinet windowing area, the present embodiment also provides a kind of vent cabinet windowing face
Product measurement apparatus, as shown in figure 4, the vent cabinet windowing area measurement apparatus 1 include：Picture locating module 11, IMAQ
Module 12 and image processing module 13.
Picture locating module 11 includes a default picture 111, is attached on the removable frame of the vent cabinet window 3, uses
In it is determined that the position of the removable frame.As shown in Fig. 2 the schematic diagram of the default picture 111 that is sticked on vent cabinet 2.Wherein, exist
In the present embodiment, specifically, the default picture 111 be bar code paster or other there is the feature image of certain feature.
Image capture module 12 is installed in the opposite of vent cabinet window 3, for gathering the image of whole vent cabinet window 3；Ventilation
The schematic diagram that image capture module 12 is installed on cabinet 2 is as shown in Figure 2.Wherein, in the present embodiment, specifically, described image is adopted
It can be imageing sensor or camera to integrate module 12.
That is, in the present embodiment, image-pickup device is installed on the inside of vent cabinet 2 so as to can gather whole logical
Wind cabinet 2 adjusts window, adjusts window edge in vent cabinet 2 and sticks feature image to be positioned.
As shown in figure 4, image processing module 13 is connected with described image acquisition module 12, image processing module 13 is concrete to be wrapped
Include：Image acquisition unit 131, memory cell 132, scan picture unit 133 and real-time windowing area acquiring unit 134.
Image acquisition unit 131 is for the image from the acquisition vent cabinet of described image acquisition module 12 window 3.
Memory cell 132 is connected with described image acquiring unit 131, for storage according to vent cabinet window 3 in window aperture
The window maximum pixel position that each barycentric coodinates of the default picture 111 determine in image when maximum and when window aperture is minimum
Put and window minimum pixel position and the default picture 111.
In the present embodiment, according to vent cabinet window 3 when window aperture is maximum and when window aperture is minimum each in image
The barycentric coodinates of the default picture 111 determine the detailed process of window maximum pixel position and window minimum pixel position such as
Under.
By 3 mouthfuls of width W input pictures acquisition module 12 of vent cabinet window, vent cabinet window 3 will be adjusted, 3 mouthfuls of vent cabinet window will be made
Minimum is closed, window picture now is absorbed, is stored as the first calibration picture, then will adjust vent cabinet 2 makes ventilation
3 mouthfuls of cabinet window is opened and puts extreme higher position under working condition, absorbs window picture now, is stored as the second calibration picture,
Measure and be input into correspondence window open height H.
According to the first calibration picture for being stored and the second calibration picture, using the first calibration picture and the second calibration picture
In the barycentric coodinates of respective default picture 111 determine window minimum pixel position Pmin and window maximum pixel position Pmax.
Scan picture unit 133 is connected with described image acquiring unit 131, for being adopted according to image capture module 12
The barycentric coodinates and the described default picture 111 for prestoring that picture 111 is preset described in the realtime graphic of the vent cabinet window 3 of collection determine
The real-time window pixel position of the vent cabinet window 3.
Specifically, in the present embodiment, as shown in figure 5, the scan picture unit 133 includes：Feature Descriptor
Extract subelement 133a, coupling subelement 133b and real-time window pixel position acquisition subelement 133c.
Feature Descriptor extract subelement 133a respectively with 132 phase of described image acquiring unit 131 and the memory cell
Even, for the Feature Descriptor in the region for covering the default picture 111 pre- from what is prestored is extracted from the realtime graphic
If the Feature Descriptor extracted in picture 111.
Coupling subelement 133b is extracted subelement 133a with the Feature Descriptor and is connected, for from the realtime graphic
The Feature Descriptor of extraction is matched with the Feature Descriptor extracted from the default picture 111 for prestoring and passes through the storage list
The characteristic point that 132 storage of unit matches.
That is, the course of work in scan picture unit 133 is as follows：Identification object image is obtained, from being clapped
Feature Descriptor is extracted on the image taken the photograph, and with certain form storage Feature Descriptor.Meanwhile, it is described default that extraction prestores
The Feature Descriptor of picture 111, the Feature Descriptor obtained from two width images is matched, and stores the characteristic point of matching,
The real-time window pixel position of the vent cabinet window 3 is determined according to the barycentric coodinates of the characteristic point for matching.
In real time window pixel position acquisition subelement 133c respectively with coupling subelement 133b and the memory cell
132 are connected, for the real-time window pixel position of the vent cabinet window 3 is determined according to the barycentric coodinates of the characteristic point for matching.
Real-time windowing area acquiring unit 134 and the memory cell 132 and 133 phase of scan picture unit
Even, for the maximum windowing area according to the real-time window pixel position, vent cabinet window 3 when window aperture is maximum, described
Window maximum pixel position and the window minimum pixel position determine the real-time windowing area of the vent cabinet window 3.
Specifically, in the present embodiment, it is in the real-time windowing area acquiring unit 134, described according to described real-time
The maximum windowing area of window pixel position, vent cabinet window 3 when window aperture is maximum, the window maximum pixel position and institute
State window minimum pixel position and determine that a kind of formula expression-form of the real-time windowing area of the vent cabinet window 3 is：
S=H × W
Wherein, Ss is real-time windowing area, and S is maximum windowing area, and P is real-time window pixel position, and Pmax is window
Maximum pixel position, Pmin are window minimum pixel position, and height of the H for vent cabinet window, W are the width of vent cabinet window.
Maximum windowing area S=H × W, then actual windowing area beFinally will be resulting
Windowing area information be sent to the executing agency of control 2 air quantity of vent cabinet, by the executing agency according to the reality of vent cabinet window 3
When windowing area the air quantity of vent cabinet 2 is adjusted.
Additionally, as shown in fig. 6, the present embodiment also provides a kind of controller 4, including in the controller 4 as mentioned above
Vent cabinet windowing area measurement apparatus 1 in image processing module 13, the execution of the controller 4 and control vent cabinet air quantity
Mechanism is connected, and the real-time windowing area of the vent cabinet window 3 that image processing module 13 is obtained by the controller 4 is sent to described to be held
Row mechanism, so that the executing agency is adjusted to the air quantity of vent cabinet 2 according to the real-time windowing area of vent cabinet window 3.
In sum, the present invention is sticked for determining the removable frame on the removable frame of the vent cabinet window
Position default picture, and vent cabinet window provided opposite can gather whole vent cabinet window image image capture module
12, the real-time windowing area of the vent cabinet window is determined by presetting the position of picture, by windowing area data is activation to execution
Mechanism, is adjusted to air quantity, so the present invention can carry out the measurement of contactless windowing area, the existing skill of effectively solving
The problem of the windowing size of the vent cabinet of left and right windowing and special-shaped window cannot be measured in art；The present invention instead of traditional contact
Sensor, with extensive autgmentability, be conducive to the intellectuality in vent cabinet and laboratory；The present invention is easy for installation, has
Stronger versatility and practicality.So, the present invention effectively overcomes various shortcoming of the prior art and has high industrial profit
With value.
The principle and its effect of above-described embodiment only illustrative present invention, it is of the invention not for limiting.It is any ripe
The personage for knowing this technology all can carry out modifications and changes to above-described embodiment under the spirit and the scope without prejudice to the present invention.Cause
This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (6)
1. a kind of vent cabinet windowing area measuring method, it is characterised in that the vent cabinet windowing area measuring method includes：
It is sticked on the removable frame of the vent cabinet window for determining the default picture of the position of the removable frame, and
The image capture module of the image of whole vent cabinet window can be gathered in the provided opposite of vent cabinet window；
Image of the vent cabinet window when window aperture is maximum and when window aperture is minimum is gathered respectively, and according to vent cabinet window in window
Each the barycentric coodinates of the default picture determine window maximum pixel in image when mouthful aperture is maximum and when window aperture is minimum
Position and window minimum pixel position；
The realtime graphic of collection vent cabinet window, determines the barycentric coodinates that picture is preset described in the realtime graphic, and according to institute
The barycentric coodinates for stating default picture and the described default picture for prestoring determine the real-time window pixel position of the vent cabinet window；
Maximum windowing area, the window according to the real-time window pixel position, vent cabinet window when window aperture is maximum
Maximum pixel position and the window minimum pixel position determine the real-time windowing area of the vent cabinet window；
It is the maximum windowing area according to the real-time window pixel position, vent cabinet window when window aperture is maximum, described
Window maximum pixel position and the window minimum pixel position determine that one kind of the real-time windowing area of the vent cabinet window is public
Formula expression-form is：
S=H × W
Wherein, Ss is real-time windowing area, and S is maximum windowing area, and P is real-time window pixel position, and Pmax is window highest
Location of pixels, Pmin are window minimum pixel position, and height of the H for vent cabinet window, W are the width of vent cabinet window.
2. vent cabinet windowing area measuring method according to claim 1, it is characterised in that according to the default picture
Barycentric coodinates and the described default picture for prestoring determine that the real-time window pixel position of the vent cabinet window specifically includes：
Obtain the realtime graphic and the Feature Descriptor in the region for covering the default picture is extracted from the realtime graphic；
By the Feature Descriptor extracted from the realtime graphic and the Feature Descriptor phase extracted from the default picture for prestoring
Match and store the characteristic point for matching；
The real-time window pixel position of the vent cabinet window is determined according to the barycentric coodinates of the characteristic point for matching.
3. a kind of vent cabinet windowing area measurement apparatus, it is characterised in that the vent cabinet windowing area measurement apparatus include：
Picture locating module, comprising a default picture, is attached on the removable frame of the vent cabinet window, described for determining
The position of removable frame；
Image capture module, is installed in the opposite of vent cabinet window, for gathering the image of whole vent cabinet window；
Image processing module, is connected with described image acquisition module, including：
Image acquisition unit, for the image of vent cabinet window is obtained from described image acquisition module；
Memory cell, is connected with described image acquiring unit, for storage according to vent cabinet window when window aperture is maximum and window
The window maximum pixel position and window that each barycentric coodinates of the default picture determine in image when mouthful aperture is minimum is minimum
Location of pixels and the default picture；
Scan picture unit, is connected with described image acquiring unit, for the vent cabinet gathered according to image capture module
The barycentric coodinates and the described default picture for prestoring that picture is preset described in the realtime graphic of window determine the reality of the vent cabinet window
When window pixel position；
Windowing area acquiring unit, is connected with the memory cell and the scan picture unit, for according to institute in real time
State the maximum windowing area of real-time window pixel position, vent cabinet window when window aperture is maximum, the window maximum pixel position
Put the real-time windowing area that the vent cabinet window is determined with the window minimum pixel position；
In the real-time windowing area acquiring unit, a kind of formula expression of the real-time windowing area of the vent cabinet window is determined
Form is：
S=H × W
Wherein, Ss is real-time windowing area, and S is maximum windowing area, and P is real-time window pixel position, and Pmax is window highest
Location of pixels, Pmin are window minimum pixel position, and height of the H for vent cabinet window, W are the width of vent cabinet window.
4. vent cabinet windowing area measurement apparatus according to claim 3, it is characterised in that the scan picture list
Unit includes：
Feature Descriptor extracts subelement, is connected with described image acquiring unit and the memory cell respectively, for from described
The spy for the Feature Descriptor in the region for covering the default picture being extracted in realtime graphic and being extracted from the default picture for prestoring
Levy description；
Coupling subelement, extracts subelement with the Feature Descriptor and is connected, for the feature extracted from the realtime graphic
Description is matched with the Feature Descriptor extracted from the default picture for prestoring and is matched by the memory cell storage
Characteristic point；
Window pixel position acquisition subelement, is connected with the coupling subelement and the memory cell, respectively for root in real time
The real-time window pixel position of the vent cabinet window is determined according to the barycentric coodinates of the characteristic point for matching.
5. vent cabinet windowing area measurement apparatus according to claim 3, it is characterised in that described image acquisition module is
Imageing sensor or camera.
6. a kind of controller, the controller include that the vent cabinet described in claim 3～claim 5 any claim is opened
Image processing module in window ara measurement apparatus, the controller are connected with the executing agency of control vent cabinet air quantity, described
The real-time windowing area of the vent cabinet window that image processing module is obtained by controller is sent to the executing agency, so that described
Executing agency is adjusted to the air quantity of vent cabinet according to the real-time windowing area of vent cabinet window.
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