CN108918208A - A kind of air sampling pump sampling volume scaler - Google Patents
A kind of air sampling pump sampling volume scaler Download PDFInfo
- Publication number
- CN108918208A CN108918208A CN201810974338.5A CN201810974338A CN108918208A CN 108918208 A CN108918208 A CN 108918208A CN 201810974338 A CN201810974338 A CN 201810974338A CN 108918208 A CN108918208 A CN 108918208A
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- Prior art keywords
- sampling
- air
- sampling volume
- volume
- scaler
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
Abstract
This application discloses a kind of air samplings to pump sampling volume scaler, it is able to detect the barometric information and temperature data of sampled air, the calculation formula of sampling volume is determined according to range belonging to barometric information and temperature data and calculates sampling volume, it will not be influenced because of the air of sampling by environment temperature or environmental stress, and the problem of causing the sampling volume result being calculated not to be true samples volume, existing air sampling pump is solved when calculating sampling volume, influence vulnerable to environment temperature and pressure, lead to not the technical issues of obtaining accurate sampling volume.
Description
Technical field
This application involves gas sampling technologies fields more particularly to a kind of air sampling to pump sampling volume scaler.
Background technique
Air refers to the gas mixing in earth atmosphere, is the necessary condition of tellurian animals and plants existence, it both contained
Have the oxygen that people depend on for existence, it is also possible to simultaneously contain toxic and harmful gas and particulate matter, therefore, in order to air quality into
Row monitoring, needs to sample the air in environment.
Sampling is carried out to air and needs sampling apparatus, current air sampling rig is air sampling pump, is calculating air
It is to be adopted using the flow velocity and sampling time of the sample gas pumped by air sampling to calculate when the gas volume of sampling pump acquisition
Sample gas volume.But it since gas has the characteristic expanded with heat and contract with cold, is influenced by environment temperature and pressure factor, in ring
When border temperature or pressure change, the sampling volume of gas may be subjected to influence,《People's Republic of China's Occupational
Sanitary standard》In, it is specified that the sampling volume of workplace air sample, sampled point temperature lower than 5 DEG C and be higher than 35 DEG C, it is big
Air pressure should convert to sampling volume according to standard sample volume reduction formula lower than 98.8kPa and when being higher than 103.4kPa.
Therefore, a kind of air sampling pump sampling volume scaler how is designed, can adapt to the variation of environment temperature and pressure, with reality
Accurately calculating for existing sampling volume, is those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
The embodiment of the present application provides a kind of air sampling pump sampling volume scaler, adopts for solving existing air
Sample is pumped when calculating sampling volume, vulnerable to the influence of environment temperature and pressure, leads to not the skill for obtaining accurate sampling volume
Art problem.
In view of this, this application provides a kind of air samplings to pump sampling volume scaler, including：Taper gas chamber, gas
Pressure sensor, temperature sensor, diaphragm pump and controller；
The baroceptor, the temperature sensor are arranged at the taper plenum interior；
Second air inlet of the diaphragm pump is connect by air circuit connection conduit with the first gas outlet of the taper gas chamber；
The bottom of the taper gas chamber is provided with the first air inlet；
The diaphragm pump is provided with the second gas outlet；
The diaphragm pump is electrically connected with the controller；
The controller is electrically connected with the baroceptor, the temperature sensor respectively, for receiving the air pressure
The barometric information of sensor detection and the temperature data of temperature sensor detection, and calculated according to the first preset sampling volume
Formula or the second preset sampling volume calculation formula calculate sampling volume.
Preferably, the baroceptor, the temperature sensor are arranged at edge in the cone bottom of the taper gas chamber.
Preferably, the baroceptor is MEMS baroceptor.
Preferably, the temperature sensor is MEMS temperature sensor.
Preferably, the material of the taper gas chamber is elastic material.
Preferably, the air circuit connection conduit is silicone tube.
Preferably, the described first preset sampling volume calculation formula is：
V0=v × S × t；
Wherein, V0For sampling volume, v is sample rate, and S is sampling gas circuit cross-sectional area, and t is the sampling time.
Preferably, the described second preset sampling volume calculation formula is：
Wherein, V0For standard sample volume, VtFor the sampling volume when temperature is t, and atmospheric pressure is p, unit L, t are
The temperature of sampled point, unit be DEG C, p be sampled point atmospheric pressure, unit kPa.
Preferably, described device further includes：Display module；
The display module is electrically connected with the controller, for showing sampling volume scaling results.
Preferably, the display module is man-machine interactive display module.
As can be seen from the above technical solutions, the embodiment of the present application has the following advantages that：
A kind of air sampling provided by the present application pumps sampling volume scaler, including：Taper gas chamber, baroceptor,
Temperature sensor, diaphragm pump and controller control the reciprocating motion of diaphragm pump by controller, so that outside air is from taper gas
First air inlet of room enters taper gas chamber, the air that will be discharged from the first gas outlet of taper gas chamber by air circuit connection conduit
It is pressed into diaphragm pump from the second air inlet, and air is discharged from the second gas outlet of diaphragm pump, the sampling of air is realized, by setting
Air pressure data and temperature data that baroceptor and temperature sensor in taper plenum interior detect sampling respectively are set,
Barometric information and temperature data are fed back into controller, controller judges whether barometric information and temperature data fall in standard sample
The air pressure range and temperature range of volume conversion are then to calculate sampling volume according to the second preset sampling volume calculation formula, no
Then, sampling volume is calculated according to the first preset sampling volume calculation formula；Device provided by the present application, is able to detect sampled air
Barometric information and temperature data, the calculation formula of sampling volume is determined simultaneously according to range belonging to barometric information and temperature data
Sampling volume is calculated, will not be influenced because of the air of sampling by environment temperature or environmental stress, and leads to the sampling being calculated
The problem of volume result is not true samples volume solves existing air sampling pump when calculating sampling volume, vulnerable to ring
The influence of border temperature and pressure, leads to not the technical issues of obtaining accurate sampling volume.
Detailed description of the invention
Fig. 1 is that a kind of air sampling provided in the embodiment of the present application pumps a structural representation of sampling volume scaler
Figure；
Fig. 2 is that a kind of air sampling provided in the embodiment of the present application pumps the taper gas chamber and gas of sampling volume scaler
The link position schematic diagram of pressure sensor, temperature sensor.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only this
Apply for a part of the embodiment, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall in the protection scope of this application.
Referring to Fig. 1, the embodiment of the present application provides a kind of air sampling pump sampling volume scaler, including：Taper
Gas chamber, baroceptor, temperature sensor, diaphragm pump and controller；
Baroceptor, temperature sensor are arranged at taper plenum interior；
Second air inlet of diaphragm pump is connect by air circuit connection conduit with the first gas outlet of taper gas chamber；
The bottom of taper gas chamber is provided with the first air inlet；
Diaphragm pump is provided with the second gas outlet；
Diaphragm pump is electrically connected with the controller；
Controller is electrically connected with baroceptor, temperature sensor respectively, for receiving the air pressure of baroceptor detection
The temperature data of data and temperature sensor detection, and according to the first preset sampling volume calculation formula or the second preset sampling body
Product calculation formula calculates sampling volume.
It should be noted that the reciprocating motion of diaphragm pump is controlled by controller in the embodiment of the present application, so that external empty
Gas enters taper gas chamber from the first air inlet of taper gas chamber, will be from the first gas outlet of taper gas chamber by air circuit connection conduit
The air of discharge is pressed into diaphragm pump from the second air inlet, and air is discharged from the second gas outlet of diaphragm pump, realizes air
Sampling, the air pressure data of sampling are detected by baroceptor and temperature sensor that taper plenum interior is arranged in respectively
And temperature data, barometric information and temperature data are fed back into controller, controller judges whether are barometric information and temperature data
Air pressure range and temperature range that standard sample volume converts are fallen in, is, then according to the second preset sampling volume calculation formula meter
Sampling volume is calculated, otherwise, sampling volume is calculated according to the first preset sampling volume calculation formula.
Diaphragm pump also known as controls pump, is the main Types of actuator, and the control by receiving regulation unit output is believed
Number, it goes to change fluid flow by power operation.Effect of the diaphragm pump in control process is receiver regulator or computer (this
Apply for the controller in embodiment) control signal, change by the flow of tune medium (sampled air in the embodiment of the present application),
Maintain controlled variable in required range, to reach the automation of production process.Diaphragm in the embodiment of the present application
Pump can be pneumatic diaphragm pump, and the working principle of pneumatic diaphragm pump is the prior art, is not described in detail herein.
A kind of air sampling provided by the present application pumps sampling volume scaler, is able to detect the barometric information of sampled air
And temperature data, the calculation formula of sampling volume is determined according to range belonging to barometric information and temperature data and calculates sampling body
Product, will not be influenced because of the air of sampling by environment temperature or environmental stress, and lead to the sampling volume result being calculated not
The problem of being true samples volume, solves existing air sampling pump when calculating sampling volume, vulnerable to environment temperature and pressure
Strong influence, leads to not the technical issues of obtaining accurate sampling volume.
Please refer to Fig. 1 and Fig. 2, a kind of another implementation of air sampling pump sampling volume scaler provided by the present application
Example, including：Taper gas chamber, baroceptor, temperature sensor, diaphragm pump and controller；
Baroceptor, temperature sensor are arranged at taper plenum interior；
Second air inlet of diaphragm pump is connect by air circuit connection conduit with the first gas outlet of taper gas chamber；
The bottom of taper gas chamber is provided with the first air inlet；
Diaphragm pump is provided with the second gas outlet；
Diaphragm pump is electrically connected with the controller；
Controller is electrically connected with baroceptor, temperature sensor respectively, for receiving the air pressure of baroceptor detection
The temperature data of data and temperature sensor detection, and according to the first preset sampling volume calculation formula or the second preset sampling body
Product calculation formula calculates sampling volume.
Further, baroceptor, temperature sensor are arranged at edge in the cone bottom of taper gas chamber.
It should be noted that as shown in Fig. 2, baroceptor, temperature sensor in the embodiment of the present application are arranged at
Edge in the cone bottom of taper gas chamber, be in order to avoid during air sampling, the gas circuit of sampled air by baroceptor and
Temperature sensor influences the accuracy of the testing result of baroceptor and temperature sensor under the pressure effect of air-flow.
Further, baroceptor is MEMS baroceptor.
Further, temperature sensor is MEMS temperature sensor.
It should be noted that MEMS (microelectromechanical systems, Microelectro Mechanical Systems), is
By microsensor, micro actuator and signal processing and control circuit, interface, communication and power supply etc. use semiconductor technology
Focus on integrated microdevice or system.In the embodiment of the present application, baroceptor and temperature sensor are selected as MEMS gas
Pressure sensor and MEMS temperature sensor have the MEMS gas compared with traditional baroceptor and traditional temperature sensor
Pressure sensor and MEMS temperature sensor are small in size, advantageously reduce the airflow influence of gas circuit air during air uses, inspection
Measured data is more accurate reliable；It is light-weight, it conveniently moves and transports；It is at low cost, it can reduce production cost, improve market
Competitiveness；It is low in energy consumption, energy conservation and environmental protection；It is easily integrated and realizes intelligence, be more suitable for modern production trend.
Further, the material of taper gas chamber is elastic material.
It should be noted that diaphragm pump generates biggish air-flow pulse effects sometimes, by taper in the embodiment of the present application
The material of gas chamber is set as elastic material, is conducive to balance the negative pressure that taper plenum interior air pulse generates, alleviates pulse effect
Answer bring air mass flow unstable.It is, of course, understood that reliable in order to reinforce the connection of the junction of taper gas chamber
Property, rigid material can will be set as at the air circuit connection of taper gas chamber.
Further, air circuit connection conduit is silicone tube.
It should be noted that silicon rubber is a kind of novel macromolecular material, have fabulous high temperature resistant (250 DEG C~
300 DEG C) and low temperature resistant (- 40 DEG C~60 DEG C) performance, have good physiological stability, and can be subjected to it is repeated multiple times harsh and
Conditions for sterilization with splendid resilience and is permanently deformed small (200 DEG C are not more than 50% in 48 hours), breakdown voltage be (20~
25KV/mm), air circuit connection conduit in the embodiment of the present application, is selected as silica gel by the features such as resistance to ozone, UV resistant, radiation hardness
Pipe is conducive to the connection reliability for improving device, avoids quality problems occur because of air circuit connection conduit, influences the accurate of sampling
Property.
Further, the first preset sampling volume calculation formula is：
V0=v × S × t；
Wherein, V0For sampling volume, v is sample rate, and S is sampling gas circuit cross-sectional area, and t is the sampling time.
Further, the second preset sampling volume calculation formula is：
Wherein, V0For standard sample volume, VtFor the sampling volume when temperature is t, and atmospheric pressure is p, unit L, t are
The temperature of sampled point, unit be DEG C, p be sampled point atmospheric pressure, unit kPa.
It should be noted that influenced since gas has the characteristic expanded with heat and contract with cold by environment temperature and pressure factor,
When environment temperature or pressure change, the sampling volume of gas may be subjected to influence, to make sampling volume infinite approach
True samples volume improves the accuracy for calculating sampling volume, is lower than 5 DEG C in sampled point temperature and forces down higher than 35 DEG C, atmosphere
In 98.8kPa and be higher than 103.4kPa when, should be converted according to standard sample volume reduction formula to sampling volume, therefore,
In the embodiment of the present application, the mode of air sampling volume is calculated provided with two kinds, one of calculation is, in sampled point temperature
When degree is lower than 98.8kPa and is higher than 103.4kPa lower than 5 DEG C and higher than 35 DEG C, atmospheric pressure, according to the second preset sampling volume meter
Calculate formula calculate sampling volume, not in the above range the case where, then use another calculation, i.e., it is preset according to first
Sampling volume calculation formula calculates sampling volume.
Further, device further includes：Display module；
Display module is electrically connected with the controller, for showing sampling volume scaling results.
It should be noted that after controller calculates sampling volume, can by display module to calculated result into
Row display, it is to be understood that display module can also show pressure information and temperature other than showing sampling volume information
Information etc., the information being particularly shown, those skilled in the art can sets itself according to actual needs, do not do specific limit herein
It is fixed.
Further, display module is man-machine interactive display module.
It should be noted that the interactivity between enhancement device and user, can set display module to man-machine friendship
Mutual display module, user can carry out relevant parameter setting in human-computer interaction display module, and human-computer interaction technology is existing
Technology, herein also without being described in detail.
It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description
Specific work process, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
The description of the present application and term " first " in above-mentioned attached drawing, " second ", " third ", " the 4th " etc. are (if deposited
) it is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that use in this way
Data are interchangeable under appropriate circumstances, so that embodiments herein described herein for example can be in addition to illustrating herein
Or the sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limit
In step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produce
The other step or units of product or equipment inherently.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
The above, above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although referring to before
Embodiment is stated the application is described in detail, those skilled in the art should understand that：It still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of air sampling pumps sampling volume scaler, which is characterized in that including：Taper gas chamber, baroceptor, temperature
Sensor, diaphragm pump and controller；
The baroceptor, the temperature sensor are arranged at the taper plenum interior；
Second air inlet of the diaphragm pump is connect by air circuit connection conduit with the first gas outlet of the taper gas chamber；
The bottom of the taper gas chamber is provided with the first air inlet；
The diaphragm pump is provided with the second gas outlet；
The diaphragm pump is electrically connected with the controller；
The controller is electrically connected with the baroceptor, the temperature sensor respectively, for receiving the air pressure sensing
The barometric information of device detection and the temperature data of temperature sensor detection, and according to the first preset sampling volume calculation formula
Or second preset sampling volume calculation formula calculate sampling volume.
2. air sampling according to claim 1 pumps sampling volume scaler, which is characterized in that the air pressure sensing
Device, the temperature sensor are arranged at edge in the cone bottom of the taper gas chamber.
3. air sampling according to claim 1 pumps sampling volume scaler, which is characterized in that the baroceptor
For MEMS baroceptor.
4. air sampling according to claim 1 pumps sampling volume scaler, which is characterized in that the temperature sensor
For MEMS temperature sensor.
5. air sampling according to claim 1 pumps sampling volume scaler, which is characterized in that the taper gas chamber
Material is elastic material.
6. air sampling according to claim 1 pumps sampling volume scaler, which is characterized in that the air circuit connection is led
Pipe is silicone tube.
7. air sampling according to claim 1 pumps sampling volume scaler, which is characterized in that described first preset adopts
Sample volume calculation formula is：
V0=v × S × t；
Wherein, V0For sampling volume, v is sample rate, and S is sampling gas circuit cross-sectional area, and t is the sampling time.
8. air sampling according to claim 1 pumps sampling volume scaler, which is characterized in that described second preset adopts
Sample volume calculation formula is：
Wherein, V0For standard sample volume, VtFor the sampling volume when temperature is t, and atmospheric pressure is p, unit L, t are sampling
Point temperature, unit be DEG C, p be sampled point atmospheric pressure, unit kPa.
9. air sampling according to claim 1 pumps sampling volume scaler, which is characterized in that described device is also wrapped
It includes：Display module；
The display module is electrically connected with the controller, for showing sampling volume scaling results.
10. air sampling according to claim 9 pumps sampling volume scaler, which is characterized in that the display module
For man-machine interactive display module.
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| CN201810974338.5A CN108918208A (en) | 2018-08-24 | 2018-08-24 | A kind of air sampling pump sampling volume scaler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810974338.5A CN108918208A (en) | 2018-08-24 | 2018-08-24 | A kind of air sampling pump sampling volume scaler |
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| CN103814294A (en) * | 2011-03-09 | 2014-05-21 | 森萨布伊斯有限公司 | Portable sampling device and method for sampling drug substances from exhaled breath |
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Application publication date: 20181130 |