CN101413850A - Air timing sampling instrument - Google Patents
Air timing sampling instrument Download PDFInfo
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- CN101413850A CN101413850A CNA2008102177373A CN200810217737A CN101413850A CN 101413850 A CN101413850 A CN 101413850A CN A2008102177373 A CNA2008102177373 A CN A2008102177373A CN 200810217737 A CN200810217737 A CN 200810217737A CN 101413850 A CN101413850 A CN 101413850A
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Abstract
The present invention relates to a kind of air timing sampling instrument, comprise mass flow controller (1), load module (2), display (3), power module (4), control module (5), solenoid valve (6) and air flow rate sensor (7); Control module (5) is used for according to the sampled air flow velocity that sets from load module (2) with control sampled air flow velocity, and, come the opening time and the shut-in time of control electromagnetic valve by mass flow controller (1) according to the sampling opening time and the shut-in time that set from load module (2); Mass flow controller (1) draws the actual flow velocity size according to the output signal of air flow rate sensor (7), and with set the sampled air velocity ratio, calculate the aperture of its deviation, thereby realize the adjusting of sampled air flow velocity size with control electromagnetic valve (6).The technology of the present invention effect is: current limliting and timing become one, and can realize step-less adjustment to the sampled air flow velocity, can feed back the actual samples air velocity, current limliting precision height.
Description
Technical field the present invention relates to green technology or technical analysis technology, particularly relates to the sample sampling container that has valve that is used for air environmental pollution test, industrial gasses test and indoor air quality test.
Background technology air timing sampling of the prior art device is made up of mechanical flow-limiting valve and timing device two parts of adopting orifice plate current limliting principle, and the user buys two different devices respectively, then combination when sampling.Existing air timing sampling device has the following disadvantages: one, two covering device occasional combination inconveniences; Two, mechanical flow-limiting valve current limliting precision is not high; Three, every kind of mechanical flow-limiting valve can only limit a kind of flow velocity, an air timing sampling device is if realize limiting multiple flow velocity, the then essential mechanical flow-limiting valve that is equipped with equal number, when a kind of flow velocity replacing obtains another kind of flow velocity, need to change corresponding mechanical flow-limiting valve, use inconvenience, the cost height.
The summary of the invention the technical problem to be solved in the present invention is to avoid above-mentioned the deficiencies in the prior art part and proposes a kind of easy to use, cost is low and the flow speed control precision is high air timing sampling instrument.
The present invention solve the technical problem can be by realizing by the following technical solutions:
Design, use a kind of air timing sampling instrument, current limliting and timing become one, and comprise mass flow controller, load module, display, power module, control module, solenoid valve and air flow rate sensor; Load module is used for setting sampling opening time and shut-in time, and sets the sampled air flow velocity; Display is used to show the data of being imported, the actual flow velocity and the current time of sampled air; Power module is used for providing power supply to control module and mass flow controller; Control module is used for the sampled air flow velocity that basis sets from load module, control with control sampled air flow velocity by mass rate, and, come the opening and closing of control electromagnetic valve by mass flow controller according to the sampling opening time and the shut-in time that set from load module; Mass flow controller, output signal according to air flow rate sensor draws the actual flow velocity size, and with this actual flow velocity size with set the sampled air velocity ratio, calculate its deviation and export the aperture of the voltage signal of different sizes, thereby realize the adjusting of sampled air flow velocity size with control electromagnetic valve.
The present invention is owing to organically be combined as a whole electron mass flow controller and the controller with clocking capability, being about to volume control device and sampling timing device is integrated in the single instrument, compare with prior art, technique effect of the present invention is: no longer need to use mechanical flow-limiting valve, can realize the electronics step-less adjustment to the sampled air flow velocity, can feed back the actual samples air velocity, current limliting precision height, volume is little, in light weight.
Description of drawings
Fig. 1 is the functional module block scheme of air timing sampling instrument of the present invention.
Embodiment is described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.
Air timing sampling instrument of the present invention, current limliting and timing become one, and as shown in Figure 1, comprise mass flow controller 1, load module 2, display 3, power module 4, control module 5, solenoid valve 6 and air flow rate sensor 7.
Load module 2 is used for setting sampling opening time and shut-in time, and sets the sampled air flow velocity; Display 3 is used to show the data of being imported, the actual flow velocity and the current time of sampled air; Power module 4 is used for providing power supply to control module 1 and mass flow controller 1.
Control module 5 is used for the sampled air flow velocity that basis sets from load module 2, set the corresponding voltage signal of sampled air flow velocity to mass flow controller 1 output with this, described mass flow controller 1 is received the gas flow rate voltage signal of just gas flow rate being carried out control and being fed back a reality behind this signal to control module 5, and the described display 3 of these control module 5 controls shows the actual flow velocity values; Described control module 5 receives sampling opening time and the shut-in time that sets from load module 2, and comes by mass flow controller 1 opening time and the shut-in time of control electromagnetic valve.The electric signal that air flow rate sensor 7 induction air velocitys change, mass flow controller 1 draws the actual flow velocity size according to the output signal of air flow rate sensor 7, and with this actual flow velocity size with set the sampled air velocity ratio, calculate its deviation and export the aperture of the voltage signal of different sizes, thereby realize the adjusting of sampled air flow velocity size with control electromagnetic valve 6.Described power module 4 adopts rechargeable battery.Described control module 5 adopts single-chip microcomputer.
Air timing sampling instrument of the present invention adopts powered by direct current, can set flow.Flow can be from 1ml/min to hundreds of ml/min, and the user can be provided with the present time, set the time of any opening and closing in the week afterwards again, can set the flow velocity of mass flow controller simultaneously.When reaching setting during sample time, solenoid valve 6 is opened, and mass flow controller 1 provides current limliting by the flow velocity of setting, air sample is sampled to container by the flow velocity that is limited of mass flow controller, when reaching when setting the shut-in time, closed electromagnetic valve reaches the purpose of timing sampling thus.
Claims (3)
1. an air timing sampling instrument is characterized in that: comprise mass flow controller (1), load module (2), display (3), power module (4), control module (5), solenoid valve (6) and air flow rate sensor (7);
Load module (2) is used for setting sampling opening time and shut-in time, and sets the sampled air flow velocity;
Display (3) is used to show data, sampled air actual flow velocity and the current time of being imported;
Power module (4) is used for providing power supply to control module (1) and mass flow controller (1);
Control module (5) is used for the sampled air flow velocity that basis sets from load module (2), control with control sampled air flow velocity by mass rate, and, come the opening time and the shut-in time of control electromagnetic valve by mass flow controller (1) according to the sampling opening time and the shut-in time that set from load module (2);
Mass flow controller (1) draws the sampled air actual flow velocity according to the output signal of air flow rate sensor (7), and with this actual flow velocity size with set the sampled air velocity ratio, calculate its deviation and export the aperture of the voltage signal of different sizes, thereby realize the adjusting of sampled air flow velocity size with control electromagnetic valve (6).
2. air timing sampling instrument as claimed in claim 1 is characterized in that: described power module (4) is a rechargeable battery.
3. air timing sampling instrument as claimed in claim 1 is characterized in that: described control module (5) is a single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102177373A CN101413850A (en) | 2008-12-02 | 2008-12-02 | Air timing sampling instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102177373A CN101413850A (en) | 2008-12-02 | 2008-12-02 | Air timing sampling instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101413850A true CN101413850A (en) | 2009-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102177373A Pending CN101413850A (en) | 2008-12-02 | 2008-12-02 | Air timing sampling instrument |
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| CN (1) | CN101413850A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063481A (en) * | 2012-12-28 | 2013-04-24 | 浙江大学 | Automatic sampling device and sampling method for surface source gas |
| CN103590880A (en) * | 2013-11-05 | 2014-02-19 | 陈明军 | Exhaust system and method for outputting gas in constant flow mode |
| CN103698164A (en) * | 2013-12-31 | 2014-04-02 | 宁波高新区环测实验器材有限公司 | VOC (volatile organic compound) gas filling and sampling system |
| CN104122121A (en) * | 2014-07-19 | 2014-10-29 | 青岛中特环保仪器有限公司 | Fluoride sampler |
| CN104297021A (en) * | 2014-09-26 | 2015-01-21 | 深圳市建筑科学研究院股份有限公司 | Timed-stopping air sampler with long-term storage function |
| CN105181395A (en) * | 2015-09-10 | 2015-12-23 | 麦克传感器股份有限公司 | Multifunctional intelligent portable air sampler and detecting method thereof |
| CN105424418A (en) * | 2015-12-17 | 2016-03-23 | 常熟市矿山机电器材有限公司 | Mine dust sampling system |
| CN105445063A (en) * | 2015-11-13 | 2016-03-30 | 北京市环境保护监测中心 | Remote VOCs (volatile organic compounds) sampling system and sampling method |
-
2008
- 2008-12-02 CN CNA2008102177373A patent/CN101413850A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063481A (en) * | 2012-12-28 | 2013-04-24 | 浙江大学 | Automatic sampling device and sampling method for surface source gas |
| CN103063481B (en) * | 2012-12-28 | 2014-12-24 | 浙江大学 | Automatic sampling device for surface source gas |
| CN103590880A (en) * | 2013-11-05 | 2014-02-19 | 陈明军 | Exhaust system and method for outputting gas in constant flow mode |
| CN103590880B (en) * | 2013-11-05 | 2016-08-17 | 陈明军 | A kind of gas extraction system and the method for constant current output gas |
| CN103698164A (en) * | 2013-12-31 | 2014-04-02 | 宁波高新区环测实验器材有限公司 | VOC (volatile organic compound) gas filling and sampling system |
| CN103698164B (en) * | 2013-12-31 | 2016-09-07 | 宁波环测实验器材有限公司 | VOC fills gas production system |
| CN104122121A (en) * | 2014-07-19 | 2014-10-29 | 青岛中特环保仪器有限公司 | Fluoride sampler |
| CN104297021A (en) * | 2014-09-26 | 2015-01-21 | 深圳市建筑科学研究院股份有限公司 | Timed-stopping air sampler with long-term storage function |
| CN105181395A (en) * | 2015-09-10 | 2015-12-23 | 麦克传感器股份有限公司 | Multifunctional intelligent portable air sampler and detecting method thereof |
| CN105445063A (en) * | 2015-11-13 | 2016-03-30 | 北京市环境保护监测中心 | Remote VOCs (volatile organic compounds) sampling system and sampling method |
| CN105424418A (en) * | 2015-12-17 | 2016-03-23 | 常熟市矿山机电器材有限公司 | Mine dust sampling system |
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Open date: 20090422 |