CN207147544U - The micrometeor sensing device of view-based access control model detection - Google Patents
The micrometeor sensing device of view-based access control model detection Download PDFInfo
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- CN207147544U CN207147544U CN201721193831.0U CN201721193831U CN207147544U CN 207147544 U CN207147544 U CN 207147544U CN 201721193831 U CN201721193831 U CN 201721193831U CN 207147544 U CN207147544 U CN 207147544U
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Abstract
A kind of flow sensor of view-based access control model detection, including liquid input device, device for output of liquid, first and second liquid transfer tube, connection component, image-taking device and control device, liquid input device have first and second input port；Output device has first and second delivery outlet；First liquid transfer tube is connected with the second input port and the first delivery outlet；Second liquid transfer tube is connected with the first input port and the second delivery outlet；There is telltale mark on connection component, liquid can flow to the first liquid transfer tube through the second input port, connection component is under the drive of the first liquid transfer tube, the liquid in second liquid transfer tube is promoted to be flowed to the second delivery outlet direction, liquid can also flow to second liquid transfer tube through the first input port, connection component promotes the liquid in the first liquid transfer tube to be flowed to the first delivery outlet direction under the promotion of second liquid transfer tube；Image-taking device carries out capture to telltale mark；Control device is used for control input mouth, the closing of delivery outlet or opening.
Description
Technical field
It the utility model is related to field of visual inspection, more particularly to a kind of micrometeor sensing device of view-based access control model detection.
Background technology
In the clinical treatment of modern hospital, the application of micro-injection pump contributes to the work for mitigating health care workers strong
Degree, security, accuracy and operating efficiency are improved, and improve nursing quality, so being widely used in clinic.In clinic by
Liquid is directly inputted into blood samples of patients system, and most of monitoring departing from medical personnel, its clinical risk in syringe pump
Also increase therewith, bring the infringement that can not be retrieved to patient sometimes.
So the On-line sampling system technology of tiny flow quantity is always the technical barrier of medical domain, i.e.,：How by medicine
Precisely, uniformly, constantly input human body, adjust the speed of input, strictly control drug dose, ensure the best available dense of medicine
Degree, it is that accuracy rate is improved in critical, avoids the strong guarantee of error.
Currently used flow rate test method has weight method, and it is mainly by the use of electronic balance as equipment is predominantly detected, to list
Fluid flow in the time of position is weighed, according to the density of liquid come reduced discharge, and the density of liquid and temperature environment bar
Part is closely related, and this method requires higher to use condition, and the time is longer during measurement, the essence that can be selected due to electronic balance
Degree is higher, and influence of the uncertainty thus brought to measurement result is smaller.But it is suitable for laboratory environment, be not suitable for
Field calibration or measurement use.
Also one kind is flow Comparison Method, is exactly using tested infusion pump syringe pump and infusion pump syringe pump detector string
Connection, testing calibration is carried out to tested equipment, and cardinal principle is defeated using the flow detection sensor of infusion pump syringe pump detector
Compared with the flow value gone out is carried out simultaneously with the flow of tested equipment, so as to obtain the calibration value and error of tested equipment.This side
Method automaticity is high, simple to operate, is suitable for the calibration at scene.
According to measuring principle, flow-rate ratio is divided into Plethysmometry and level gauge, Plethysmometry master to mensuration again
If realize more complicated come reduced discharge, technology by the liquid volume flowed through in cooling water of units of measurement time.
Level gauge is mainly the change that liquid level is detected using infrared detector and infrared tube.Every group of infrared tube
Compartment is 8mm, altogether using 6-12 groups to pipe.As shown in figure 1, its measuring principle is：Infusion pump detector 200 is by by infusion pump
202 set some flow, the liquid inlet 203 of detector 200 are then connected to by infusion tube, in detector 200
Portion, three-way magnetic valve 204 are controlled to liquid flow direction.When detect start when, liquid is from 203 → three-way magnetic valve of entrance 204
The direction of 206 → infrared tube of → buffering ball 208 is flowed, and this process is referred to as " water-filling ".When liquid level reaches the infrared spy of most significant end
When surveying device position, three-way magnetic valve 204 controls liquid from 208 → buffering ball of infrared tube, 206 → threeway 204 → 212 sides of outlet
To flowing, this process referred to as " discharges water ", i.e., the water in measurement pipeline under gravity, is vented, is waited next time naturally
Measurement.The effect of overflow pipe is to prevent liquid level from going out highest measurement position, and this measuring method has the following disadvantages：
1）Reaction speed is slow, it is necessary to which water level has arrived the detector of the top, or just refreshes number by an infrared tube
According to, it is necessary to just have data output for a long time in the case of low discharge.
2）Infrared tube signal is easily influenceed by tube wall drop, and data stability is bad.
3）The process of discharging water is the Action of Gravity Field by liquid itself, often occurs that drop hangs over the somewhere in glass tube walls,
There is the high uncertain phenomenon of moment change in this place in liquid level when causing to measure next time.
Because of the particularity of infrared ray in itself, easily disturbed by environment temperature, visible ray and other spuious factors,
The rigorous arrangement position for calculating infrared diode is just needed when developing infrared sensor, in addition infrared diode and glass tube
The spacing on surface is also required to accurately calculate, and is otherwise likely to occur the problems such as liquid surface detectivity is inadequate.
The content of the invention
The technical problems to be solved in the utility model be to provide one kind can to liquid micro flow instantaneous velocity in pipeline and
The flow sensor that integrated flux measures.
In order to solve the above technical problems, the utility model embodiment provides following technical scheme：
A kind of micrometeor sensing device of view-based access control model detection, including liquid input device, device for output of liquid, the first liquid
Body transfer tube, second liquid transfer tube, connection component, image-taking device, control device and calculating and signal output apparatus, wherein liquid
Body input unit has the first input port and the second input port；Device for output of liquid has the first delivery outlet and the second delivery outlet；
First liquid transfer tube is connected with the first input port and the first delivery outlet；Second liquid transfer tube and the second input port and second are defeated
Outlet is connected；Connection component is used to connect the first liquid transfer tube and second liquid transfer tube, thereon with a telltale mark, its
In, liquid can flow to the first liquid transfer tube through the second input port, and connection component promotes under the drive of the first liquid transfer tube
Liquid in second liquid transfer tube flows to the second delivery outlet direction, and to form the first fluid flow paths, liquid can also be through
First input port flows to second liquid transfer tube, and the connection component promotes the first liquid under the promotion of second liquid transfer tube
Liquid in body transfer tube flows to the first delivery outlet direction, to form second liquid circulation passage；Image-taking device is used for even
Telltale mark on connected components carries out capture；Control device is used for the positional information of the telltale mark obtained according to image-taking device,
To control the closing and unlatching of the first input port, the second input port, the first delivery outlet, the second delivery outlet, and then select liquid edge
First fluid flow paths or the circulation of second liquid circulation passage, the calculating and signal output apparatus are used to enter image information
Row calculates, and is converted into the flow velocity and flow of liquid.
Wherein, there is first piston in first liquid transfer tube, have second to live in the second liquid transfer tube
Plug, the connection component include a push rod, the telltale mark outside push rod, the push rod for connect first piston and
Second piston.
Wherein, the micrometeor sensing device further comprises one first reversal valve, the second reversal valve, the 3rd reversal valve,
First reversal valve is used to connecting and control the first input port, the opening of the second input port and closing, and the second reversal valve is respectively with the
One input port, the first liquid transfer tube and the first delivery outlet are connected, and control it to open and close, and the 3rd reversal valve is respectively with the
Two input ports, second liquid transfer tube and the second delivery outlet are connected, and control it to open and close, and the control device is used to control
Make the first reversal valve, the second reversal valve, the opening of the 3rd reversal valve and closing.
Wherein, the control device includes a standard picture memory module, instant image storage module, comparison analysis mould
Block, control module, the telltale mark that the standard picture memory module is used to preserve image-taking device shooting are located at the first liquid biography
Defeated pipe and standard picture information during second liquid transfer tube centre position, instant image storage module are used to store image-taking device
Immediately the image information of the telltale mark obtained, compare analysis module and be used for the standard picture information of telltale mark and figure immediately
As information is compared, the positional information of telltale mark is obtained, the control module is used for according to the comparison for comparing analysis module
As a result, the first reversal valve, the second reversal valve, the 3rd reversal valve is controlled to open and closing so that liquid is from first circulation passage
Or second circulation passage circulation.
Wherein, when the positional information for comparing analysis module detection telltale mark liquid full for the first liquid transfer tube, control
Module controls the circulation of the first circulation passage, and so as to realize the first liquid transfer tube water discharge mode, second liquid transfer tube is water-filling
Pattern；When the positional information for comparing analysis module detection telltale mark liquid full for second liquid transfer tube, control module control
Second circulation passage circulates, and so as to realize second liquid transfer tube water discharge mode, the first liquid transfer tube is water-filling pattern.
Wherein, the image-taking device is additionally operable to take image information of the telltale mark in any t and t+1 moment
Picture.
Wherein, the flow sensor further comprises a data processing module, its figure that can be obtained to image-taking device
As information is handled, and pixel value is converted image information into, and then obtain t and the image pixel matrix at t+1 moment.
Wherein, the calculating and signal output module are used for t and the figure at t+1 moment for obtaining data processing module
As picture element matrix information is calculated, and then the amount of pixels d that the piston for obtaining liquid transfer tube moves in t to t+1 moment,
And then the instantaneous delivery L and integrated flux S of liquid transfer tube liquid is calculated, and result of calculation is exported.
Where it is assumed that telltale mark is Pt in the image array information of t（x1,y1）, in the image array at t+1 moment
Information is Pt+1 (x2, y2), and the pixel of the telltale mark within the △ t time differences is drawn according to the distance between 2 points calculation formula
Poor d calculation formula is：
。
Wherein, if the pixel resolution of image-taking device is f（1/cm）, the internal diameter of first and second liquid transfer tube is r (cm),
The flow rate of liquid of input is L (ml/h), then：
Wherein, integrated flux S (ml) can be according in t0 to t total periods, the pixel movement value d in all time intervals
Sum is calculated, and calculation formula is：
Wherein, the flow sensor also includes a pressure test module, for obtaining the first liquid transfer tube and the
Fluid pressure in two liquid transfer tubes.
The beneficial effects of the utility model are：By setting two fluid flow paths, can be realized inside sensing device
Different liquid flow directions, by the high-resolution imagery technology of vision, obtain the positional information of piston, so it is accurate at two
The measurement of microflow rate and integrated flux is realized in liquid transfer tube.
Brief description of the drawings
Fig. 1 is the schematic diagram of existing infusion pump detector.
Fig. 2 is the schematic diagram of the utility model specific embodiment flow sensor.
Fig. 3 is the schematic diagram of control device in the utility model specific embodiment flow sensor.
Embodiment
For the ease of understanding the utility model, with reference to the accompanying drawings and detailed description, the utility model is carried out more
Detailed description.It should be noted that when element is expressed " being fixed on " another element, it can be directly in another element
Above or therebetween there may be one or more elements placed in the middle.When an element is expressed " connection " another element, it can
To be directly to another element or there may be one or more elements placed in the middle therebetween.This specification is used
Term " on ", " under ", " interior ", " outer ", the orientation of the instruction such as " bottom " or position relationship be based on orientation shown in the drawings or
Position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply signified device or member
Part must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
In addition, term " first ", " second " " the 3rd " etc. are only used for describing purpose, and it is not intended that indicating or implying relatively important
Property.
Unless otherwise defined, technology all used in this specification and scientific terminology are with belonging to skill of the present utility model
The implication that the technical staff in art field is generally understood that is identical.In art used in the description of the present utility model in this specification
Language is intended merely to describe the purpose of specific embodiment, is not intended to limit the utility model.Art used in this specification
Language "and/or" includes the arbitrary and all combination of one or more related Listed Items.
Hereinafter, the utility model will be more specifically described with reference to accompanying drawing.
As shown in Fig. 2 for the schematic diagram of the utility model specific embodiment flow sensor 100, it is defeated that it includes liquid
Enter device 102, the first reversal valve 104, the second reversal valve 106, the first liquid transfer tube 108, second liquid transfer tube 110, company
Connected components 112, the 3rd reversal valve 114, image-taking device 116, output device 118, control device 120 and pressure detecting module
122。
Wherein, liquid input device 102 is outside liquid input interface, and for providing the input of liquid, the first liquid passes
Defeated pipe 108, second liquid transfer tube 110 are generally precision glass pipe, or the liquid transfer tube footpath of other materials, are used for
Transmit the liquid that liquid input device 102 inputs.
The input unit 102 has one first input port 1022 and one second input port 1024, the output device 118
With the first delivery outlet 1182 and the second delivery outlet 1184, first reversal valve 104 is used to connect and control the first input port
1022nd, the opening of the second input port 1024 and closing.Second reversal valve 106 respectively with the first input port 1022, the first liquid
The delivery outlet 1182 of body transfer tube 108 and first is connected, and controls it to open and close.3rd reversal valve 114 is respectively with
Two input ports 1024, the delivery outlet 1184 of second liquid transfer tube 110 and second are connected, and control it to open and close.
First liquid transfer tube 108 is connected with second liquid transfer tube 110 by connection component 112, and described first
There is first piston 1082 in liquid transfer tube 108, there is second piston 1102 in the second liquid transfer tube 110, first
Piston 1082, second piston 1102 can be in the case where the mobilization force of liquid drive, respectively in the first liquid transfer tube 108 and second liquid
Moved in transfer tube 110.
The connection component 112 includes a push rod 1124 and the telltale mark 1122 outside push rod 1124, wherein,
The push rod 1124 is used to connect first piston 1082 and second piston 1102, and first piston 1082 and second piston 1102 are the
When one liquid transfer tube 108 in second liquid transfer tube 110 with moving push rod 1124 can be driven to move, and then drive push rod 1124
On telltale mark 1122 move, at different moments, the positional information of telltale mark 1122 can be different.
First reversal valve 104, the second reversal valve 106, the 3rd reversal valve 114 are four-way ball reversal valve, be can be achieved
Multi-passage circulating.
The image-taking device 116 is generally camera, can be to the telltale mark 1122 on connection component 112 positioned at first
Capture is carried out when liquid transfer tube 108 and middle second liquid transfer tube 110, and is defined as standard picture information, when flow passes
When induction device 100 starts, image-taking device 116 also can carry out capture to the positional information of telltale mark 1122, when liquid is first
When the transfer tube 110 of transfer tube 108 and second flows, image-taking device 116 can also take to telltale mark 112 at different moments
Picture.
Referring to Fig. 3, the control device 120 includes a standard picture memory module 1202, instant image storage module
1204th, analysis module 1206, control module 1208 are compared, wherein, the standard picture memory module 1202 is used to preserve capture
The standard picture information for the telltale mark 1122 that device 116 is shot, instant image storage module 1206 are used to store image-taking device
The image information of 116 telltale marks 1122 obtained immediately.The comparison analysis module 1206 is used for telltale mark 1122
Standard picture information is compared with instant image information, judges the positional information of telltale mark 1122, the control module
1208 are used to be changed according to the comparison result for comparing analysis module 1206, the first reversal valve 104 of control, the second reversal valve the 106, the 3rd
Open and close to the passage of valve 114, to control the flow direction of liquid.
Further, the flow sensor 100 also includes a pressure test module 122, for obtaining the first liquid
Fluid pressure in transfer tube 108 and second liquid transfer tube 110, when the first input port 1022, the second input port 1024, first
When the delivery outlet 1184 of delivery outlet 1182 and second is all in closing, liquid input device 102 also is continuing to input, the first reversal valve
104 hydraulic pressure constantly increases, and the pressure test module 122 can provide the effect of alarm according to the situation of pressure, in addition,
The pressure detecting module 122 can be also used for detecting the first reversal valve 104, second reversal valve 106, the 3rd reversal valve 114
Seal pressure performance.Under normal measurement mode, channel interior fluid pressure can be obtained, this pressure value show piston with
The situation of the frictional force of tube wall.If pressure value is excessive, illustrate between the tube wall of liquid transfer tube and piston too tightly, if pressure
It is worth too small, illustrates to have space between piston and tube wall or piston leak be present.
In addition, micrometeor transmission induction device 100 also includes some soft conduits, for reversal valve, liquid transfer tube,
Connection between input port, delivery outlet.
Before measurement, capture is carried out to the positional information of telltale mark 1122 by image-taking device 116 first, and save as mark
Quasi- image information, it can obtain what is represented between the feature of telltale mark 1122 and every pixel of image from standard picture information
" the pixel resolution f used is needed during actual range, i.e. follow-up calculating（1/cm）”.
During measurement, start flow sensor 100, by image-taking device 116 to the progress capture of telltale mark 1122, and with
The Plays image information of standard picture memory module 1202 is compared, when comparison result be telltale mark 1122 close to the first liquid
During body transfer tube 108, show that the liquid in the first liquid transfer tube 108 is less than the amount of liquid in second liquid transfer tube 110, control
Molding block 1208 controls the first reversal valve 104 to be connected with the first input port 1024, closes the second input port 1022, while control the
Two reversal valves 106 connect with the first input port 1024 and the first liquid transfer tube 108, close the first delivery outlet 1182, control the
Three reversal valves 114 connect with the second delivery outlet 1184 and second liquid transfer tube 110, close the company with the second input port 1022
Connect.I.e.：Liquid inputs from the first input port 1024, enters after the second reversal valve 106 in the first liquid transfer tube 108,
Liquid flowing drives first piston 1082 to move, and then promotes push rod 1124 to be moved to the direction of second liquid transfer tube 110, push rod
The 1124 mobile position that can drive telltale mark 1122 thereon is changed, and second liquid transfer tube is driven in push rod 1124
Second piston 1102 in 110 moves, and the liquid in second liquid transfer tube 110 is flowed to after the 3rd reversal valve 114
Flowed out at second delivery outlet 1184, that is, form the first circulation passage.When comparison result be telltale mark 1122 close to second liquid
During transfer tube 110, show that the liquid in second liquid transfer tube 1110 is less than the amount of liquid in the first liquid transfer tube 108, control
Device 120 processed controls the first reversal valve 104 to be connected with the second input port 1022, closes the first input port 1024, while control the
Two reversal valves 106, the first liquid transfer tube 108 and the first delivery outlet 1182 connect, the reversal valve 114 of control the 3rd and the first input
Mouth 1022 and second liquid transfer tube 110 connect, and close the connection with the second delivery outlet 1184.I.e.：Liquid is from the second input port
Input in 1022, enter after the 3rd reversal valve 114 in second liquid transfer tube 110, liquid flowing drives second piston
1102 movements, and then promote push rod 1124 to be moved to the direction of the first liquid transfer tube 108, the mobile of push rod 1124 can drive thereon
The position of telltale mark 1122 change, push rod 1124 can drive the first piston 1082 in the first liquid transfer tube 108
It is mobile, and then the liquid in the first liquid transfer tube 108 is flowed to through the second reversal valve 114 at the first delivery outlet 1182 and flow out,
And form the second circulation passage.When the first liquid transfer tube 108 is full of, after the liquid in second liquid transfer tube 110 is drained,
Or first liquid transfer tube 108 empty, when the liquid of second liquid transfer tube 110 is full of, pass through image-taking device 116 detection positioning
The position of mark 1122, each reversal valve is controlled, realizes the change of liquid flow direction, push rod 1124 and telltale mark 1122
Move back and forth.
The flow sensor 100 also includes image processing module 124 and calculating and signal output module 126, upper
Liquid is stated to flow to from the first liquid transfer tube 108 in second liquid transfer tube 110 or flow to from second liquid transfer tube 110
During in first liquid transfer tube 108, image-taking device 116 can enter in any t and t+1 moment to telltale mark 1122
Row capture, described image processing module 124 can be handled described image information, and obtain telltale mark 1122 in any t
Moment and the image array information at t+1 moment, the calculating and signal output module 126 again believe the image array of two time
Breath carries out calculating analysis, and then can draw the flow velocity L and integrated flux S of liquid, and its specific processing mode is：
Assuming that telltale mark 1122 is Pt in the image array information of t（x1,y1）, in the image array at t+1 moment
Information is Pt+1 (x2, y2), according to the distance between 2 points calculation formula：
CalculateThe amount of pixels of telltale mark movement in time interval.
If the pixel resolution of image-taking device 116 in such a mode is f（1/cm）, the first liquid transfer tube 108 and second
The interior warp of liquid transfer tube is r (cm), and the flow rate of liquid of input is L (ml/h), then：
Wherein, first liquid transfer tube 108 and second liquid transfer tube 110 are high-accuracy glass pipe, and out-of-roundness exists
In 0.015mm, internal diameter r tolerance is less than 0.02mm.
Integrated flux S (ml) can be according in t0 to t total periods, the pixel movement value d sums in all time intervals
To be calculated, calculation formula is：
。
The utility model obtains the image information of telltale mark 1122 by vision detection technology in time in different time,
And then the flow velocity L in liquid transfer tube and flow S is calculated, meanwhile, by setting two fluid flow paths, can be passed in flow
Different liquid flow directions is realized inside induction device, and then the detection of flow velocity is realized at least two accurate liquid transfer tubes.
In addition, flow sensor of the present utility model should can also measure in the flow velocity of various calibers, when the liquid that need to measure big flow
During transmission speed into, liquid transfer tube is changed to the transfer tube being relatively large in diameter.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modification, equivalent substitution or improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (12)
- A kind of 1. micrometeor sensing device of view-based access control model detection, it is characterised in that including：Liquid input device, there is the first input port and the second input port；Device for output of liquid, there is the first delivery outlet and the second delivery outlet；First liquid transfer tube, it is connected with the first input port and the first delivery outlet；Second liquid transfer tube, it is connected with the second input port and the second delivery outlet；Connection component, for connecting the first liquid transfer tube and second liquid transfer tube, thereon with a telltale mark, wherein, Liquid can flow to the first liquid transfer tube through the second input port, and connection component promotes the under the drive of the first liquid transfer tube Liquid in two liquid transfer tubes flows to the second delivery outlet direction, and to form the first fluid flow paths, liquid can also be through One input port flows to second liquid transfer tube, and the connection component promotes the first liquid under the promotion of second liquid transfer tube Liquid in transfer tube flows to the first delivery outlet direction, to form second liquid circulation passage；Image-taking device, for carrying out capture to the telltale mark on connection component；Control device, for the positional information of the telltale mark obtained according to image-taking device, to control the first input port, second defeated Entrance, the first delivery outlet, the second delivery outlet turn off or on, and then select liquid along the first fluid flow paths or the second liquid Body circulation passage circulates；Calculating and signal output apparatus, for image information to be calculated, are converted into the flow velocity and flow of liquid.
- 2. the micrometeor sensing device of view-based access control model detection according to claim 1, it is characterised in that first liquid There is first piston in transfer tube, there is second piston in the second liquid transfer tube, the connection component includes a push rod, Outside push rod, the push rod is used to connect first piston and second piston the telltale mark.
- 3. the micrometeor sensing device of view-based access control model detection according to claim 2, it is characterised in that the micrometeor passes Induction device further comprises the first reversal valve, the second reversal valve, the 3rd reversal valve, and the first reversal valve is for connecting and controlling first Input port, the opening of the second input port and closing, the second reversal valve respectively with the first input port, the first liquid transfer tube and first Delivery outlet is connected, and control its open and close, the 3rd reversal valve respectively with the second input port, second liquid transfer tube and second Delivery outlet is connected, and controls it to open and close, and the control device is used to control the first reversal valve, the second reversal valve, the 3rd The opening of reversal valve and closing.
- 4. the micrometeor sensing device of view-based access control model detection according to claim 3, it is characterised in that the control device Including a standard picture memory module, instant image storage module, analysis module, control module are compared, the standard picture is deposited The telltale mark that storage module is used to preserve image-taking device shooting is located at the first liquid transfer tube and second liquid transfer tube interposition Standard picture information when putting, instant image storage module are used for the image letter for storing the telltale mark that image-taking device obtains immediately Breath, compare analysis module and be used to the standard picture information of telltale mark being compared with instant image information, obtain positioning mark The positional information of note, the control module are used to be changed according to the comparison result for comparing analysis module, the first reversal valve of control, second Opening and closing to valve, the 3rd reversal valve so that liquid circulates from the first circulation passage or second circulation passage.
- 5. the micrometeor sensing device of view-based access control model detection according to claim 4, it is characterised in that analyze mould when comparing During full for the first liquid transfer tube liquid of the positional information of block detection telltale mark, control module controls the circulation of the first circulation passage, So as to realize the first liquid transfer tube water discharge mode, second liquid transfer tube is water-filling pattern；When comparing, analysis module detection is fixed During full for the second liquid transfer tube liquid of the positional information of position mark, control module controls the circulation of the second circulation passage, so as to realize Second liquid transfer tube water discharge mode, the first liquid transfer tube are water-filling pattern.
- 6. the micrometeor sensing device of view-based access control model detection according to claim 1, it is characterised in that the image-taking device It is additionally operable to carry out capture in any t and the image information at t+1 moment to telltale mark.
- 7. the micrometeor sensing device of view-based access control model detection according to claim 6, it is characterised in that the flow sensing Device further comprises data processing module, and its image information that can be obtained to image-taking device be handled, and by image information Pixel value is converted into, and then obtains t and the image pixel matrix at t+1 moment.
- 8. the micrometeor sensing device of view-based access control model detection according to claim 7, it is characterised in that the calculating and letter Number output module, t and the image pixel matrix information at t+1 moment for data processing module to be obtained are calculated, And then the amount of pixels d that the piston for obtaining liquid transfer tube moves in t to t+1 moment, and then liquid transfer tube is calculated The instantaneous delivery L and integrated flux S of liquid, and result of calculation is exported.
- 9. the micrometeor sensing device of view-based access control model detection according to claim 8, it is characterised in that assuming that telltale mark It is Pt in the image array information of t（x1,y1）, it is Pt+1 (x2, y2) in the image array information at t+1 moment, according to two The distance between point calculation formula show that the calculation formula of the pixel difference d of telltale mark within the △ t time differences is：。
- 10. the micrometeor sensing device of view-based access control model detection according to claim 9, it is characterised in that set image-taking device Pixel resolution be f（1/cm）, the internal diameter of first and second liquid transfer tube is r (cm), and the flow rate of liquid of input is L (ml/h), Then：。
- 11. the micrometeor sensing device of the view-based access control model detection according to claim 9 or 10, it is characterised in that cumulative flow Measuring S (ml) can be according in t0 to t total period, and pixel movement value d sums in all time intervals are calculated, calculating Formula is：。
- 12. the micrometeor sensing device of view-based access control model detection according to claim 1, it is characterised in that the flow passes Induction device also includes a pressure test module, for obtaining the liquid pressure in the first liquid transfer tube and second liquid transfer tube Power.
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