CN202533349U - Instrument used for detecting dust concentration in environment - Google Patents
Instrument used for detecting dust concentration in environment Download PDFInfo
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- CN202533349U CN202533349U CN2012202045554U CN201220204555U CN202533349U CN 202533349 U CN202533349 U CN 202533349U CN 2012202045554 U CN2012202045554 U CN 2012202045554U CN 201220204555 U CN201220204555 U CN 201220204555U CN 202533349 U CN202533349 U CN 202533349U
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- dust
- gas channel
- monitoring probe
- dust concentration
- concentration detector
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Abstract
The utility model discloses a dust concentration detection instrument which comprises an airflow passageway, a dust monitoring probe, an airflow driving device and a calculation module, wherein the airflow driving device is arranged at one end or two ends of the airflow passageway, and used for driving airflow to pass the airflow passageway, the dust monitoring probe is inserted into the airflow passageway in the direction perpendicular to the flow direction of the airflow, and used for detecting electric charge of dust in the air flow which passes the area where the dust monitoring probe is located, and the calculation module is in electric connection with the dust monitoring probe, and used for converting the dust electric charge quantity detected by the dust monitoring probe into dust concentration of the air flow. The dust concentration detection instrument is capable of being used for detecting dust in air, in factory workshops and in gas discharged by factories.
Description
Technical field
The utility model relates to a kind of instrument, can be described as dust concentration detector, and it can be used for the dust concentration in the testing environment.
Background technology
Have dust more or less in atmospheric environment, the industrial discharge gas etc., the monitoring of these dust is just confirming to assess that they are extremely important to the influence of human being's production, life for people.
One Chinese patent application numbers 200910182387.6 discloses a kind of direct-reading dust concentration detector; Comprise air extractor and sampling head; Characteristics are: also include sender unit, signal receiving device, dust blocking apparatus, the signal processing apparatus that carries display screen and casing; Sampling head and casing are fixed and are stuck in outside the casing, are connected with the signal receiving device gas circuit, and air extractor, sender unit, signal receiving device and signal processing device are set in the casing; Signal receiving device matches with sender unit and is positioned at the top of sender unit; The dust blocking apparatus is located between sender unit and the signal receiving device, and sender unit and signal receiving device are electrically connected with said signal processing apparatus by circuit, and emitter is connected with said air extractor gas circuit.Advantage: neither can be because of vibration influences the detection effect, again can be truly the dust concentration in the reflection operating environment and can on display screen, showing immediately.
There is deficiency in many aspects in existing dust concentration detector, for example use inconvenient, can not be in time, the dust concentration in the accurate response mensuration operating mode.Therefore be very urgent for this type dust concentration detector that can overcome the existing product problem at present.
The utility model content
The purpose of the utility model be overcome in the prior art exist not enough, provide a kind of can be easy to use, in time, accurate response measures the dust concentration detector of the dust concentration in the operating mode.
The utility model provides a kind of dust concentration detector, it is characterized in that comprising gas channel, dust monitoring probe, air flow drive device and computing module, wherein:
Described air flow drive device is arranged on an end or the two ends of said gas channel, is used to order about air communication and crosses this gas channel;
Said dust monitoring probe is inserted in this gas channel with the direction vertical with air flow direction, is used for detecting the electric charge of the dust of this dust monitoring probe region of air-flow approach;
Said computing module and said dust monitoring probe electrically connect, and are used for the dust-charge amount that the dust monitoring probe is surveyed is converted into the dust concentration of air-flow.
It is quite convenient that the dust concentration detector of the utility model uses.
Description of drawings
Fig. 1 has described an instance of the utility model dust concentration detector.
Fig. 2 has described another instance of the utility model dust concentration detector.
Embodiment
Mode with example further specifies the utility model below, and these examples are not to be used for the limiting protecting scope.
Referring to Fig. 1, wherein described an instance of the utility model dust concentration detector, this dust concentration detector is characterised in that and comprises gas channel 1, dust monitoring probe 2, air flow drive device 3 and computing module 4, wherein:
Described air flow drive device 3 is arranged on an end or the two ends of said gas channel 1, is used to order about air-flow 5 through this gas channel 1;
Said dust monitoring probe 2 is inserted in this gas channel 1 with the direction vertical with air flow direction, is used for detecting the pop one's head in electric charge of dust of 2 regions of this dust monitoring of air-flow approach;
Said computing module 4 electrically connects with said dust monitoring probe 2, is used for the dust-charge amount that the dust monitoring probe is surveyed is converted into the dust concentration of air-flow 5.
According to an instance, said gas channel 1 can be a tubbiness cavity.Like this, the air flow drive device 3 in these gas channel 1 one ends or two ends setting can make air-flow 5 constantly through this passage.
According to an instance, the xsect of said gas channel 1 can be shapes such as circle, square (can be square or rectangular), ellipse, and is preferably circular or oval.
According to an instance, said gas channel 1 comprises the longitudinal length of an air flow direction aspect, also comprises the radical length (also can be called lateral length) of vertical with this air flow direction (being the xsect of gas channel 1).If wherein the xsect of gas channel 1 is circular then this radical length is this diameter of a circle; If the xsect of gas channel 1 is square then this radical length is this square catercorner length, this radical length is this oval major diameter length if the xsect of gas channel 1 is oval-shaped.In an example, said longitudinal length is more than 1.5 times of radical length.In an example, said longitudinal length is 1.5～20 times of radical length.In an example, said longitudinal length is 1.5～15 times of radical length.In an example, said longitudinal length is 1.5～10 times of radical length.In an example, said longitudinal length is 1.5～8 times of radical length.In an example, said longitudinal length is 1.5～5 times of radical length.In an example, said longitudinal length is 2～5 times of radical length.In an example, said longitudinal length is 2～4 times of radical length.The inventor finds, when said longitudinal length is in 2～5 times the scope of radical length the time, can measure the stable of numerical value being lower than to reach in time of 5 minutes; When longitudinal length be radical length below 1.5 times the time, reach the time of measuring steady state (SS) to prolong greatly, reach more than 30 minutes; And when longitudinal length be radical length more than 8 times the time; The time that reaches the mensuration steady state (SS) on the one hand reached more than 20 minutes, and the difficulty of the design of instrument, installation, transportation etc. also increases greatly when those skilled in the art hope in the scope of radical length at 5～50cm on the other hand.
According to an instance, said dust monitoring probe 2 is inserted in this gas channel 1 with the direction vertical with air flow direction, is used for detecting the pop one's head in electric charge of dust of 2 regions of this dust monitoring of air-flow approach.This dust monitoring probe 2 can accept to be suspended in the dust electric signal of the lotus static in the air-flow; Dust concentration becomes positive correlation in the intensity of this electric signal and the air-flow; After this electric signal is transferred to computing module 4, can be converted into the dust concentration in the air-flow by this computing module 4.Said dust monitoring probe 2 is with needle-like; Whether the dust in the air-flow can't exert an influence to measuring the result with 2 collisions of dust monitoring probe, and therefore the stability for fear of the flow direction of 2 pairs of air-flows of this dust monitoring probe, flow velocity etc. exerts an influence, this dust monitoring probe 2 preferably a diameter less than the 5cm column; Preferred its diameter is 1mm～5cm; Preferred its diameter is 1mm～3cm, and preferably its diameter is 2mm～2cm, and preferably its diameter is 2mm～1cm.In addition; The length of this dust monitoring probe 2 in gas channel 1 is basically near radical length mentioned above, and preferably the length of dust monitoring probe 2 in gas channel 1 is 50～99% of said radical length, and preferred 60～99%; Preferred 70～99%; Preferred 80～99%, preferred 70～98%, preferred 80～95%.The inventor finds, when the length of said dust monitoring probe 2 in gas channel 1 is in 70～98% the scope of said radical length the time, can measure the stable of numerical value being lower than to reach in time of 5 minutes; And for length is 70～98% the dust monitoring probe 2 of said radical length; When detecting, the influence littler (peak/paddy is than little by 37%) when low this scope (being that the length of said dust monitoring probe 2 in gas channel 1 is below 70% of said radical length) that the dust granule size compares for the influence of testing result fluctuation.
According to an instance, the said dust monitoring 2 most preferred middles that are located substantially on said gas channel 1 longitudinal length of popping one's head in.In some embodiments; This dust monitoring probe 2 is positioned at the air-flow upper reaches or the downstream of the middle of said gas channel 1 longitudinal length; Preferred this upstream and downstream distance is no more than 20% of longitudinal length, and promptly from an end calculating of gas channel 1, this dust monitoring probe 2 is between said gas channel 1 longitudinal length 30～70%; Preferably between 40～60%, more preferably between 45～55%.
According to an instance, said air flow drive device 3 can be fan or can realize the miscellaneous equipment of similar functions, for example air compressor etc.In addition; Gas channel 1 only an end be provided with under the situation of air flow drive device 3; The flow direction of air-flow can be a both direction, for example can be to pour in the gas channel 1 through this air flow drive device 3, also can be by this air flow drive device 3 air in the gas channel 1 to be extracted out.In addition, can air flow drive device 3 all be set at the two ends of gas channel 1.
According to an instance, said gas channel 1 is essentially for example hollow cylindrical thing of a hollow columnar thing.In an example; Referring to Fig. 2; This hollow columnar beyond the region of objective existence week can also be wrapped up by a housing 6 further, in these housing 6 inside, and gas channel 1 outside of hollow columnar thing; The cavity that forms can hold the circuit of described computing module 4 and forceful electric power or light current, for example is used to drive the power supply, power-supply controller of electric of air flow drive device 3 etc.Like this, some appurtenances are wrapped in the above-mentioned cavity, and gas channel 1 inside is not provided with other parts except dust monitoring probe 2, can make steady air current ground through gas channel 1.
According to an instance, an end or the two ends of said gas channel 1 can also be provided with latticed thing, get into to avoid big object, for example leaf, the scraps of paper etc.
The dust concentration detector of the utility model can be used for monitoring the dust of airborne dust, factory floor, the dust in factory's emission gases etc.The particle diameter of dust can change in the larger context, and for example particle diameter is 0.1um～1000um, perhaps 0.1um～100um, perhaps 0.2um～50um, the perhaps scope of 0.5um～20um etc.PM2.5 value for the monitoring air ambient also is well-adapted.
Claims (10)
1. a dust concentration detector is characterized in that comprising gas channel, dust monitoring probe, air flow drive device and computing module, wherein:
Described air flow drive device is arranged on an end or the two ends of said gas channel, is used to order about air communication and crosses this gas channel;
Said dust monitoring probe is inserted in this gas channel with the direction vertical with air flow direction, is used for detecting the electric charge of the dust of this dust monitoring probe region of air-flow approach;
Said computing module and said dust monitoring probe electrically connect, and are used for the dust-charge amount that the dust monitoring probe is surveyed is converted into the dust concentration of air-flow.
2. according to the dust concentration detector of claim 1, it is characterized in that said gas channel is a tubbiness cavity, its xsect is circular, square or oval.
3. according to the dust concentration detector of claim 1, it is characterized in that the longitudinal length of said gas channel is 1.5～8 times of radical length.
4. according to the dust concentration detector of claim 1, it is characterized in that the longitudinal length of said gas channel is 2～5 times of radical length.
5. according to the dust concentration detector of claim 1, it is characterized in that the length of said dust monitoring probe in gas channel is 50～99% of gas channel radical length.
6. according to the dust concentration detector of claim 1, it is characterized in that the length of said dust monitoring probe in gas channel is 70～98% of gas channel radical length.
7. according to the dust concentration detector of claim 1, it is characterized in that, from an end calculating of said gas channel, said dust monitoring probe said gas channel longitudinal length 30～70% between.
8. according to the dust concentration detector of claim 1, it is characterized in that, from an end calculating of said gas channel, said dust monitoring probe said gas channel longitudinal length 40～60% between.
9. according to the dust concentration detector of claim 1, it is characterized in that said air flow drive device is fan or air compressor.
10. according to the dust concentration detector of claim 1, it is characterized in that said gas channel is a hollow columnar thing, this hollow columnar beyond the region of objective existence week also is enclosed with a housing; In this enclosure interior, the gas channel of hollow columnar thing is outside, and the cavity of formation holds described computing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202045554U CN202533349U (en) | 2012-05-09 | 2012-05-09 | Instrument used for detecting dust concentration in environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202045554U CN202533349U (en) | 2012-05-09 | 2012-05-09 | Instrument used for detecting dust concentration in environment |
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| Publication Number | Publication Date |
|---|---|
| CN202533349U true CN202533349U (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202045554U Expired - Fee Related CN202533349U (en) | 2012-05-09 | 2012-05-09 | Instrument used for detecting dust concentration in environment |
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| CN (1) | CN202533349U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792671A (en) * | 2014-06-12 | 2015-07-22 | 南京环康电子科技有限公司 | Particle measuring device and measuring method |
| CN105242123A (en) * | 2015-09-29 | 2016-01-13 | 兰州大学 | Suspension particle charge mass ratio measuring instrument |
| CN109932291A (en) * | 2019-01-29 | 2019-06-25 | 黑龙江科技大学 | A kind of electrostatic induction dust concentration detection device based on vortex street |
-
2012
- 2012-05-09 CN CN2012202045554U patent/CN202533349U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792671A (en) * | 2014-06-12 | 2015-07-22 | 南京环康电子科技有限公司 | Particle measuring device and measuring method |
| CN105242123A (en) * | 2015-09-29 | 2016-01-13 | 兰州大学 | Suspension particle charge mass ratio measuring instrument |
| CN109932291A (en) * | 2019-01-29 | 2019-06-25 | 黑龙江科技大学 | A kind of electrostatic induction dust concentration detection device based on vortex street |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Chen Wuying Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Chen Wuying Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20150509 |
|
| EXPY | Termination of patent right or utility model |