CN201844851U - Gas flowmeter and portable testing equipment based on ion migration - Google Patents
Gas flowmeter and portable testing equipment based on ion migration Download PDFInfo
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- CN201844851U CN201844851U CN2010202914349U CN201020291434U CN201844851U CN 201844851 U CN201844851 U CN 201844851U CN 2010202914349 U CN2010202914349 U CN 2010202914349U CN 201020291434 U CN201020291434 U CN 201020291434U CN 201844851 U CN201844851 U CN 201844851U
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Abstract
The utility model discloses a gas flowmeter which comprises a structural body, a start-oscillation spring leaf, an acoustic sensor and a processing unit, wherein a gas flow passage for allowing gases to flow through is formed inside the structural body; the start-oscillation spring leaf has a constant natural frequency, and is fixed in the gas flow passage to generate vibrations when a gas flow passes through; the acoustic sensor is arranged on the outer wall of the structural body in a position adjacent to the start-oscillation spring leaf and is used for sensing sound amplitudes generated by the vibrations; and the processing unit is used for obtaining corresponding rate of the gas flow according to the sound amplitudes from the acoustic sensor. The utility model further relates to portable testing equipment based on ion migration, which comprises a portable ion mobility spectrometer and the gas flowmeter, wherein the portable ion mobility spectrometer comprises a carrier gas pipeline for supplying a carrier gas; and the carrier gas is used for taking a sample to be tested into the portable ion mobility spectrometer. According to the technical scheme provided by the utility model, the real-time and reliable monitoring on the flow rate of the carrier gas of such testing equipment based on ion migration can be realized through a simple structure.
Description
Technical field
The utility model relates to the gas flow measurement field, relates in particular to a kind of gas meter, a kind of portable checkout equipment based on the ion migration that uses this gas meter.
Background technology
The ion migrating technology is a kind of quick, sensitive, portable on-the-spot detection technique.This technology has begun to be applied to military and safety check mechanism, can detect gas, explosive, drugs etc.
, need reliable and stable air-flow and bring test sample into checkout equipment inside (this air-flow is called carrier gas), and then analyze and detect when the operate as normal based on this class checkout equipment of ion migration as carrier.Therefore, the checkout equipment key that can normally detect is stable air-flow.
In the process that reality is used, often cause gas circuit to be stopped up because some impurity are brought in carrier gas into, or since in the use carrier gas corrosion of tracheae is caused tracheae gas leakage, make checkout equipment can not reach the testing goal of expection.
At present, in portable checkout equipment, there is the restriction of the factors such as characteristic (carrier gas contains the organic gas composition usually), maximum gas flow of space, gas based on ion migration.And the general volume of existing flow sensor is bigger, and can not measure organic gas.
Above restriction causes at present and in the portable checkout equipment based on the ion migration carrier gas air flow rate is not monitored in real time, or simply insert suspended body flowmeter rely on the user artificial judge determine whether flow normal.Increase the uncertain factor in the checkout equipment use like this, perhaps increased user's workload.
The utility model content
Consider that the problems referred to above propose the utility model.
According to an aspect of the present utility model, a kind of gas meter has been proposed, comprising: structure, the inside of structure forms the gas channel that supplied gas flows through; Starting of oscillation reed, the constant and described starting of oscillation reed of the natural frequency of described starting of oscillation reed are fixed in the gas channel to pass through to produce vibration along with air-flow; Sound transducer, described sound transducer is arranged on the outer wall of structure in the position of closing on the starting of oscillation reed, and described sound transducer sensing is by the sound amplitude of described vibration generation; And processing unit, described processing unit is based on the corresponding flow that obtains air-flow from the described sound amplitude of sound transducer.
Advantageously, described processing unit gives the alarm when gas flow excess flow scope.
Advantageously, described starting of oscillation reed is made by corrosion-resistant material.
Advantageously, roughly the flow direction with air-flow is vertical for the bearing of trend of the starting of oscillation of described starting of oscillation reed part.
Advantageously, be provided with orifice plate in the flow channel of described structure, described orifice plate arranges perpendicular to the flow direction of air-flow, and air-flow only flows through an opening that is arranged on the orifice plate, the starting of oscillation part of described starting of oscillation reed and the described opening described opening of extend through of turning up the soil at interval.
Advantageously, described processing unit comprises AD converter and microprocessor, described AD converter will send data to microprocessor after will carrying out the AD conversion from the signal of sound transducer, and described microprocessor is handled to obtain the corresponding flow of gas the data that transmit.Advantageously, described microprocessor carries out in interpolation, level and smooth, the noise reduction process at least one to the data that transmit.
According to one side more of the present utility model, a kind of portable checkout equipment based on the ion migration is provided, this checkout equipment comprises portable ionic migration spectrometer and above-mentioned gas meter, wherein: described portable ionic migration spectrometer comprises the carrier gas channel that carrier gas is provided, and described carrier gas is used for test sample is brought in the portable ionic migration spectrometer; And described structure is a pipeline section of described carrier gas channel, and described gas is carrier gas.
According to the technical solution of the utility model, realize by simple structure based on the carrier gas flux of this class checkout equipment of ion migration in real time, reliable monitoring.
Description of drawings
Describe embodiment of the present utility model in detail by the reference accompanying drawing, it is clearer that the utility model will become, wherein:
Fig. 1 is the structural representation according to the gas meter of an embodiment of the present utility model;
Fig. 2 is the schematic perspective view according to the gas meter of an embodiment of the utility model; With
Fig. 3 is the schematic three dimensional views after the structure of the gas meter among Fig. 2 is cut open.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.In instructions, same or analogous drawing reference numeral is indicated same or analogous parts.Following explanation to the utility model embodiment is intended to overall utility model design of the present utility model is made an explanation with reference to accompanying drawing, and not should be understood to a kind of restriction of the present utility model.
As shown in accompanying drawing 1-Fig. 3, the utility model discloses a kind of gas meter 100, this gas meter 100 comprises: structure 1, the inside of structure 1 forms the gas channel 2 that supplied gas flows through; Starting of oscillation reed 3, the constant and starting of oscillation reed 3 of the natural frequency of starting of oscillation reed 3 are fixed in the gas channel 2 to pass through to produce vibration along with air-flow; Sound transducer 4, sound transducer 4 is arranged on the outer wall of structure 1 in the position of closing on starting of oscillation reed 3, and sound transducer 4 sensings are by the sound amplitude of described vibration generation; With processing unit 5, processing unit 5 is based on the corresponding flow that obtains air-flow from the described sound amplitude of sound transducer 4.
Because the natural frequency of starting of oscillation reed 3 is constant, when the air communication of different flow is crossed starting of oscillation reed 3, because the amplitude difference of starting of oscillation reed 3, the sound amplitude that corresponds on the natural frequency is also different, and there is corresponding relation in the size of sound amplitude and gas flow, promptly, the flow of the gas by starting of oscillation reed 3 is big, then corresponding sound amplitude is big, and the flow of the gas by starting of oscillation reed 3 is little, and then corresponding sound amplitude is little.
If the maximal value and the minimum value of the gas flow that permission is passed through are respectively L
MaxAnd L
Min, then the corresponding minimum and maximum sound amplitude corresponding to the natural frequency of starting of oscillation reed 3 is respectively A
MaxAnd A
MinBecause the natural frequency of starting of oscillation reed 3 is constant, can identify the sound amplitude A of starting of oscillation reed 3 on natural frequency by the frequency amplitude recognizer
c, certainly, based on this sound amplitude A
cAlso just determined corresponding gas flow L
cIf A
cBe in A
MinAnd A
MaxBetween, or L
cBe in L
MaxAnd L
MinBetween, show that then gas flow is in normal working flow, otherwise send alerting signal.
In addition, because in the utility model, sound transducer 4 is arranged on the outer wall of structure 1 in the position of closing on starting of oscillation reed 3, so, can avoid of the influence of mordant organic gas for surveying instruments such as sound transducers.More advantageously, starting of oscillation reed 3 can be made by corrosion-resistant material.
For the flow of detected gas more effectively, the bearing of trend of the starting of oscillation part 6 of the starting of oscillation reed 3 roughly flow direction with air-flow is vertical.
As shown in Fig. 2 and Fig. 3, be provided with orifice plate 7 in the flow channel 2 of structure 1, orifice plate 7 arranges perpendicular to the flow direction of air-flow, and air-flow only flows through an opening 8 that is arranged on the orifice plate, the starting of oscillation part 6 of starting of oscillation reed 3 and the opening 8 extend through opening 8 of turning up the soil at interval.Like this, even under the low discharge situation, also can produce necessary amplitude to starting of oscillation part 6.Under the situation that is provided with orifice plate 7, starting of oscillation reed 3 preferably one is fixed on the orifice plate 7.
As shown in fig. 1, processing unit 5 comprises AD converter 9 and microprocessor 10, AD converter 9 will send data to microprocessor 10 after will carrying out the AD conversion from the signal of sound transducer 4, and the data of 10 pairs of transmission of microprocessor are handled to obtain the corresponding flow of gas.
Advantageously, microprocessor carries out in interpolation, level and smooth, the noise reduction process at least one to the data that transmit.For example, existing under the situation of neighbourhood noise, can adopt noise reduction process.
The utility model also relates to a kind of portable checkout equipment based on the ion migration, this checkout equipment comprises: portable ionic migration spectrometer, described portable ionic migration spectrometer comprises the carrier gas channel that carrier gas is provided, and described carrier gas is used for test sample is brought in the portable ionic migration spectrometer; With aforementioned gas meter 100, wherein structure 1 is a pipeline section of described carrier gas channel, and described gas is carrier gas.
Use the portable checkout equipment based on the ion migration of above-mentioned gas flowmeter 100, whether the air flow rate that can monitor carrier gas in real time is in range of normal value, neighbourhood noise and electromagnetism can be got rid of in the checkout equipment course of work to the interference of flow measurement, and the influence of organic gas can be avoided measuring equipment.In other words, above-mentioned gas flowmeter 100 is applied to the portable checkout equipment that moves based on ion, can guarantees that instrument is in normal duty.For example, gas meter 100 can be monitored carrier gas flux and whether is in the operate as normal value, can produce alerting signal and remind the user to take measures when carrier gas flux is too high or too low for a certain reason, thereby guarantee the normal operation of instrument.
Discuss the application of gas meter of the present utility model below.
At first, the gas passage inside of flowing through in supplied gas is provided with the starting of oscillation reed, and the constant and starting of oscillation reed of the natural frequency of starting of oscillation reed is along with air-flow passes through to produce vibration; Secondly, the position of closing on the starting of oscillation reed on the outer wall of gas passage is provided with sound transducer, the sound amplitude that the sound transducer sensing is produced by described vibration; Subsequently, based on the corresponding flow that obtains air-flow from the signal of described sound transducer, wherein, advantageously, to carry out AD conversion from the signal of sound transducer, the data that AD conversion back is obtained are carried out the corresponding flow that at least one back in interpolation, level and smooth, the noise reduction process obtains air-flow.
The utility model has been described with reference to one exemplary embodiment.But, apparent, those skilled in the art can obviously draw modification and the change that plurality of optional is selected under the instruction of foregoing description.Thereby the utility model comprises all selectable modification and the changes within the spirit and scope that fall into claims.
Claims (6)
1. gas meter comprises:
Structure, the inside of structure forms the gas channel that supplied gas flows through,
It is characterized in that described gas meter also comprises:
Starting of oscillation reed, the constant and described starting of oscillation reed of the natural frequency of described starting of oscillation reed are fixed in the gas channel to pass through to produce vibration along with air-flow;
Sound transducer, described sound transducer is arranged on the outer wall of structure in the position of closing on the starting of oscillation reed, and described sound transducer sensing is by the sound amplitude of described vibration generation; With
Processing unit, described processing unit is based on the corresponding flow that obtains air-flow from the described sound amplitude of sound transducer.
2. gas meter according to claim 1 is characterized in that:
Described starting of oscillation reed is made by corrosion-resistant material.
3. gas meter according to claim 1 and 2 is characterized in that:
Roughly the flow direction with air-flow is vertical for the bearing of trend of the starting of oscillation part of described starting of oscillation reed.
4. gas meter according to claim 3 is characterized in that:
Be provided with orifice plate in the flow channel of described structure, described orifice plate is arranged perpendicular to the flow direction of air-flow, and air-flow only flows through an opening that is arranged on the orifice plate, the starting of oscillation of described starting of oscillation reed part and the described opening described opening of extend through of turning up the soil at interval.
5. gas meter according to claim 1 and 2 is characterized in that:
Described processing unit comprises AD converter and microprocessor, and described AD converter will send data to microprocessor after will carrying out the AD conversion from the signal of sound transducer, and described microprocessor is handled to obtain the corresponding flow of gas the data that transmit.
6. portable checkout equipment based on ion migration comprises:
Portable ionic migration spectrometer, described portable ionic migration spectrometer comprises the carrier gas channel that carrier gas is provided, described carrier gas is used for test sample is brought in the portable ionic migration spectrometer,
It is characterized in that described portable checkout equipment also comprises:
According to each described gas meter among the claim 1-5, wherein said structure is a pipeline section of described carrier gas channel, and described gas is carrier gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202914349U CN201844851U (en) | 2010-08-13 | 2010-08-13 | Gas flowmeter and portable testing equipment based on ion migration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202914349U CN201844851U (en) | 2010-08-13 | 2010-08-13 | Gas flowmeter and portable testing equipment based on ion migration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201844851U true CN201844851U (en) | 2011-05-25 |
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ID=44039739
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202914349U Expired - Lifetime CN201844851U (en) | 2010-08-13 | 2010-08-13 | Gas flowmeter and portable testing equipment based on ion migration |
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| Country | Link |
|---|---|
| CN (1) | CN201844851U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374880A (en) * | 2010-08-13 | 2012-03-14 | 同方威视技术股份有限公司 | Gas flowmeter, ion migration-based portable detection equipment, and method for measuring gas flow |
| CN104133048A (en) * | 2014-08-01 | 2014-11-05 | 淮南润成科技股份有限公司 | Gas extraction-exhaust multiparameter monitoring device for mine |
| CN113739864A (en) * | 2021-09-08 | 2021-12-03 | 北京声智科技有限公司 | Gas flow detection method and electronic equipment |
-
2010
- 2010-08-13 CN CN2010202914349U patent/CN201844851U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374880A (en) * | 2010-08-13 | 2012-03-14 | 同方威视技术股份有限公司 | Gas flowmeter, ion migration-based portable detection equipment, and method for measuring gas flow |
| CN102374880B (en) * | 2010-08-13 | 2013-01-02 | 同方威视技术股份有限公司 | Gas flowmeter, ion migration-based portable detection equipment, and method for measuring gas flow |
| CN104133048A (en) * | 2014-08-01 | 2014-11-05 | 淮南润成科技股份有限公司 | Gas extraction-exhaust multiparameter monitoring device for mine |
| CN113739864A (en) * | 2021-09-08 | 2021-12-03 | 北京声智科技有限公司 | Gas flow detection method and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110525 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |