CN104941043B - The calibration method and system of a kind of Venturi - Google Patents
The calibration method and system of a kind of Venturi Download PDFInfo
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- CN104941043B CN104941043B CN201510420246.9A CN201510420246A CN104941043B CN 104941043 B CN104941043 B CN 104941043B CN 201510420246 A CN201510420246 A CN 201510420246A CN 104941043 B CN104941043 B CN 104941043B
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Abstract
The present invention is applied to Venturi field there is provided a kind of calibration method of Venturi, and step includes：A, is uniformly divided into some groups of voltage control quantities, and control corresponding air output to flow into venturi system module by each group of voltage control quantity respectively by voltage output amount；B, obtains pressure value, air mass flow numerical value and oxygen density value of each air output in the case of different Resistance Values after venturi system module；C, the four dimensional relationship table is made according to above-mentioned numerical value；D, according to the four dimensional relationship table, other parts parameter is obtained by the partial parameters among voltage control quantity, pressure value, air mass flow numerical value, oxygen density value.The four dimensional relationship table obtained according to the present invention, the method than calculating such as utilize, pressure as needed, flow inverse go out required voltage controlled quentity controlled variable, or oxygen concentration is extrapolated according to current voltage control quantity pressure and flow, the pressure or flow velocity of setup parameter can be rapidly achieved by the present invention.
Description
Technical field
The invention belongs to the calibration method and system in Venturi field, more particularly to a kind of Venturi.
Background technology
The function of lung ventilator is to be supplied by doctor's setup parameter to patient, because when flow velocity is by Venturi, can produce
Raw Venturi effect, with the reduction of the increase Fluid pressure of flow velocity, can thus produce external suction, also exactly utilize production
Raw suction reaches output gas, the control of oxygen concentration, and this point brings benefit, meanwhile, also change Venturi electricity
Press controlled quentity controlled variable, the relation property of flow and pressure three, lung ventilator in order to accurately be rapidly achieved the pressure or flow velocity of setup parameter,
So needing to be corrected the Venturi for changing characteristic, but there are not effective ways to enable lung ventilator quick at present
Reach the pressure or flow velocity of parameter preset.
The content of the invention
The technical problems to be solved by the invention are the calibration method and system for providing a kind of Venturi, it is intended to mesh
It is preceding not have the problem of effective ways enable the pressure or flow velocity that lung ventilator is rapidly achieved parameter preset.
The present invention is achieved in that a kind of calibration method of Venturi, comprises the following steps：
Step A, some groups of voltage control quantities are uniformly divided into by voltage output amount, and respectively by each group of voltage control quantity
Corresponding air output is controlled to flow into venturi system module；
Step B, obtains pressure of each air output in the case of different Resistance Values after venturi system module
Force value, air mass flow numerical value and oxygen density value；
Step C, the four dimensional relationship is made according to the voltage control quantity, pressure value, air mass flow numerical value and oxygen density value
Table；
Step D, according to the four dimensional relationship table, by voltage control quantity, pressure value, air mass flow numerical value, oxygen density value
Among partial parameters obtain other parts parameter.
Further, in the step A, the voltage output amount is divided into the voltage control quantity of 8 groups of uniform deciles.
Further, in the step B, by Resistance Value according to small to being uniformly divided into 6 groups greatly.
Present invention also offers a kind of calibration system of Venturi, including air output module, vapour lock generation module,
Venturi system module, detection module and stored record module, wherein：
The air output module, the voltage control quantity for exporting some groups of uniform deciles according to setup parameter, and point
Corresponding air output is not controlled to flow into the venturi system module by each voltage control quantity；
The vapour lock generation module, for producing corresponding resistance according to sets requirement；
The venturi system module, is connected with the air output module and the vapour lock generation module, in institute
State under the corresponding resistance produced by vapour lock generation module, the air output produced for the air output module is flowed through, and
Coordinate the pure oxygen source of the gas of input, export the gas of corresponding oxygen concentration；
The detection module, is connected with the air output module and the venturi system module, current for monitoring
The pressure value of corresponding resistance, the flow number of air output and the oxygen density value produced；
The stored record module, for recording pressure value, air mass flow under different resistances and different voltage control quantities
Numerical value and oxygen density value, and obtain the four dimensional relationship table between them, for user accordingly by voltage control quantity, pressure value,
Partial parameters among air mass flow numerical value, oxygen density value obtain other parts parameter.
Further, the air output module is used for the voltage control quantity that voltage output amount is divided into 8 groups of uniform deciles.
Further, the vapour lock generation module, for producing 6 groups of uniform resistances according to sets requirement.
Compared with prior art, beneficial effect is the present invention：According to the four dimensional relationship table that obtains of the present invention, the ratio such as utilize
The method of calculating, pressure as needed, flow inverse go out required voltage controlled quentity controlled variable, or according to current voltage control quantity
Pressure and flow extrapolate oxygen concentration, and the pressure or flow velocity of setup parameter can be rapidly achieved by the present invention.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the calibration method of Venturi provided in an embodiment of the present invention.
Under Fig. 2 is different voltage control quantities provided in an embodiment of the present invention and different resistances, pressure, air mass flow numerical value it
Between relation schematic diagram.
Fig. 3 is a kind of calibration system structural representation of Venturi provided in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Venturi effect：The effect shows restricted flow in the flow section by diminution, fluid occur flow velocity or
The phenomenon of flow increase, its flow is inversely proportional with flow section.And know the increase of flow velocity with Fluid pressure by bernoulli law
Reduction, i.e., common venturi phenomenon.
When gas or liquid flow inside Venturi tube, at the most narrow place of pipeline, dynamic pressure (velocity head) reaches most
Big value, static pressure (Resting Pressure) reaches the speed of minimum value gases (liquid) because the relation for cross-section variation of shoving
And rise.Whole shove will undergo pipe reductions process within the same time, thus pressure is also in the reduction of same time.And then
Pressure differential is produced, this pressure differential is used to measure or provides an external suction to fluid.
It is typically all that external suction absorbs aerial air, to reach as input source of the gas using purity oxygen for lung ventilator
To the gas for exporting different oxygen concentrations.The calibration method that the present embodiment is provided is, in order to find a kind of computation model, can to compare
The voltage control quantity of accurate reflection output, the relation under different resistances between oxygen concentration, pressure, gas flow.
As shown in figure 1, for a kind of calibration method of Venturi provided in an embodiment of the present invention, step includes：
S1, some groups of voltage control quantities are uniformly divided into by voltage output amount, and respectively by each group of voltage control quantity control
Make corresponding air output and flow into venturi system module.In this step, by controlling different voltages to act on gas
Body flow valve, reaches the control to air mass flow output quantity.
S2, obtains pressure of each air output in the case of different Resistance Values after venturi system module
Value, air mass flow numerical value and oxygen density value；
S3, the four dimensional relationship table is made according to the voltage control quantity, pressure value, air mass flow numerical value and oxygen density value；
S4, according to the four dimensional relationship table, by the voltage control quantity of the Venturi, pressure value, air mass flow number
Partial parameters between value, oxygen density value obtain other parts parameter.
Found according to lot of experiment validation, be as shown in Figure 2 venturi system for accurate description venturi system characteristic
System characteristic general relationship table, experiment finds to need, to reach the maximum effect of calibrating required for the present embodiment, it is necessary to which voltage is defeated
Output is divided into the voltage control quantity of 8 groups of uniform deciles, and each voltage control quantity is to control corresponding air output, Resistance Value
6 groups uniformly are divided into from 0 to maximum resistance (0 is to open non-resistance state completely, and maximum resistance is closed mode), altogether
6*8=48 point is needed, each point records the oxygen density value of the point simultaneously, by these point datas, can obtain one
The four dimensional relationship table, the four dimensional relationship table characterizes voltage control quantity, pressure, flow, the relation table of oxygen concentration of output.
The four dimensional relationship table is obtained by calibrating, the method than calculating such as utilizes, pressure as needed, flow inverse
Go out required voltage controlled quentity controlled variable, or oxygen concentration is extrapolated according to current voltage control quantity, pressure and flow.
Specific calibration process：
1：Provide first voltage control quantity, adjust out it is uniform 6 resistance point, record pressure and air mass flow numerical value and
Oxygen concentration data.
2：Second voltage control quantity is switched to, uniform 6 resistances point is adjusted out, records pressure and air mass flow numerical value
And oxygen concentration data.
3：Go down 8 altogether according to the method circulation of one and two steps, record and corresponding record pressure and air mass flow
Numerical value and oxygen concentration data, data are preserved after the completion of calibration.
4：Made according to 48 points of the data relationship recorded in the four dimensional relationship figure as shown in Figure 2, figure and characterize four groups
Under different voltage control quantities and different resistances, pressure, discharge relation.
As shown in figure 3, be a kind of calibration system of Venturi provided in an embodiment of the present invention, including air output mould
Block 1, vapour lock generation module 5, venturi system module 2, detection module 3 and stored record module 4：
Air output module 1, for according to setup parameter export some groups of uniform deciles voltage control quantity, and respectively by
Each voltage control quantity controls corresponding air output to flow into venturi system module 2；Specifically, gas output module 1 will
Voltage output amount is divided into the voltage control quantity of 8 groups of uniform deciles.
Vapour lock generation module 5, for producing corresponding resistance according to sets requirement；Specifically, vapour lock generation module 5 is produced
6 groups of uniform resistances.
Venturi system module 2, is connected with air output module 1 and vapour lock generation module 5, in vapour lock generation module
Under corresponding resistance produced by 5, the air output produced for air output module 1 is flowed through, and coordinates the purity oxygen of input
Source, exports the gas of corresponding oxygen concentration；
Detection module 3, is connected, what is currently produced for monitoring is corresponding with air output module 1 and venturi system module 2
The pressure value of resistance, the flow number of air output and oxygen density value；
Stored record module 4, for recording the pressure value under different resistances and different voltage control quantities, air mass flow numerical value
And oxygen density value, and the four dimensional relationship table between them is obtained, so that user is accordingly by voltage control quantity, pressure value, air
Partial parameters among flow number, oxygen density value obtain other parts parameter.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (6)
1. a kind of calibration method of Venturi, it is characterised in that the calibration method comprises the following steps：
Step A, is uniformly divided into some groups of voltage control quantities, and controlled respectively by each group of voltage control quantity by voltage output amount
Corresponding air output flows into venturi system module；
Step B, obtain pressure value in the case of different Resistance Values after venturi system module of each air output,
Air mass flow numerical value and oxygen density value；
Step C, the four dimensional relationship table is made according to the voltage control quantity, pressure value, air mass flow numerical value and oxygen density value；
Step D, according to the four dimensional relationship table, among voltage control quantity, pressure value, air mass flow numerical value, oxygen density value
Partial parameters obtain other parts parameter.
2. calibration method as claimed in claim 1, it is characterised in that in the step A, is divided into 8 by the voltage output amount
The voltage control quantity of the uniform decile of group.
3. calibration method as claimed in claim 1, it is characterised in that in the step B, by Resistance Value according to small to big uniform
It is divided into 6 groups.
4. a kind of calibration system of Venturi, it is characterised in that the calibration system includes air output module, vapour lock and produced
Raw module, venturi system module, detection module and stored record module, wherein：
The air output module, for according to setup parameter export some groups of uniform deciles voltage control quantity, and respectively by
Each voltage control quantity controls corresponding air output to flow into the venturi system module；
The vapour lock generation module, for producing corresponding resistance according to sets requirement；
The venturi system module, is connected with the air output module and the vapour lock generation module, in the gas
Under corresponding resistance produced by resistance generation module, the air output produced for the air output module is flowed through, and is coordinated
The pure oxygen source of the gas of input, exports the gas of corresponding oxygen concentration；
The detection module, is connected with the air output module and the venturi system module, for monitoring current generation
The pressure value of corresponding resistance, the flow number of air output and oxygen density value；
The stored record module, for recording the pressure value under different resistances and different voltage control quantities, air mass flow numerical value
And oxygen density value, and the four dimensional relationship table between them is obtained, so that user is accordingly by voltage control quantity, pressure value, air
Partial parameters among flow number, oxygen density value obtain other parts parameter.
5. calibration system as claimed in claim 4, it is characterised in that the air output module is used for voltage output amount point
Into the voltage control quantity of 8 groups of uniform deciles.
6. calibration system as claimed in claim 4, it is characterised in that the vapour lock generation module, for according to sets requirement
Produce 6 groups of uniform resistances.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1817378A (en) * | 2006-03-10 | 2006-08-16 | 张培林 | Non-compressed air mixing system of intelligent respirator |
| CN101474451A (en) * | 2009-01-20 | 2009-07-08 | 张培林 | Oxygen concentration control device of intelligent type breathing machine |
| CN204073003U (en) * | 2014-08-15 | 2015-01-07 | 深圳市安保科技有限公司 | A kind of Pneumatic electrical control aerating system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080190421A1 (en) * | 2007-02-12 | 2008-08-14 | Darryl Zitting | Venturi apparatus with incorporated flow metering device |
| WO2014078918A1 (en) * | 2012-11-23 | 2014-05-30 | Petróleo Brasileiro S.A. - Petrobras | Flowmeter with central venturi tube |
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2015
- 2015-07-16 CN CN201510420246.9A patent/CN104941043B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1817378A (en) * | 2006-03-10 | 2006-08-16 | 张培林 | Non-compressed air mixing system of intelligent respirator |
| CN101474451A (en) * | 2009-01-20 | 2009-07-08 | 张培林 | Oxygen concentration control device of intelligent type breathing machine |
| CN204073003U (en) * | 2014-08-15 | 2015-01-07 | 深圳市安保科技有限公司 | A kind of Pneumatic electrical control aerating system |
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Denomination of invention: Calibration method and system for Venturi device Effective date of registration: 20191212 Granted publication date: 20170804 Pledgee: Agricultural Bank of China Limited Qianhai branch Pledgor: Shenzhen Poople Science and Technology Co., Ltd. Registration number: Y2019440020035 |
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Date of cancellation: 20210107 Granted publication date: 20170804 Pledgee: Agricultural Bank of China Limited Qianhai branch Pledgor: SHENZHEN PROBE SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2019440020035 |
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Address after: 518103 area a, 4th floor, 6th floor, 9th floor, building C, 71-3 Xintian Avenue, Fuyong street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Pubo Medical Technology Co.,Ltd. Address before: 518103 area a, 4th floor, 6th floor, 9th floor, building C, 71-3 Xintian Avenue, Fuyong street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN PROBE SCIENCE & TECHNOLOGY Co.,Ltd. |
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