CN203132964U - Dust concentration monitoring device based on charge induction of alternating electric field - Google Patents
Dust concentration monitoring device based on charge induction of alternating electric field Download PDFInfo
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- CN203132964U CN203132964U CN 201320148256 CN201320148256U CN203132964U CN 203132964 U CN203132964 U CN 203132964U CN 201320148256 CN201320148256 CN 201320148256 CN 201320148256 U CN201320148256 U CN 201320148256U CN 203132964 U CN203132964 U CN 203132964U
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Abstract
The utility model discloses a dust concentration monitoring device based on charge induction of an alternating electric field and belongs to the technical field of dust concentration detection. The monitoring device comprises an electric field sensor for detecting dust, a signal amplification circuit, a filtering circuit, a signal collecting and processing unit, a driving circuit, a core processing unit and a display unit, wherein the electric field sensor comprises two electrode plates which are arranged oppositely; a low-frequency alternating-current electric field is applied to the electrode plates; the electrode plates are provided with lead wires for outputting voltage signals and the output voltage signals are amplified through the signal amplification circuit and then enter the filtering circuit; the signals are subjected to filtering treatment and then enter the signal collecting and processing unit; the collected and processed signals are transmitted to the core processing unit; and the core processing unit is used for carrying out analysis treatment on the signals to obtain dust concentration and transmits a concentration value to the display device to be displayed. The monitoring device is simple and feasible; and the cost of the device is reduced while the accuracy of a monitoring result can be guaranteed.
Description
Technical field
The utility model belongs to dust concentration detection technique field, relates to a kind of dust concentration monitoring device based on the alternating electric field electric charge induction.
Background technology
Dust refers to be suspended in airborne solia particle, dust too much can cause serious harm to environment and health, especially in human lives and working environment, industrial dust is the natural enemy of human health, it is the main cause of bringing out multiple disease, therefore, how the dust concentration in work, the living environment accurately being detected is to be related to the healthy of people and key work that everything goes well with your work carries out.
Studied at present the method for multiple measurement dust concentration both at home and abroad, as filtering weight method, β rays method, piezoelectric crystal inductive method, optical method, supercritical ultrasonics technology, electric charge induction method and capacitance method etc.Wherein weight method is the most basic measuring method, but it can not be used for the continuous monitoring of dust concentration; Though the β rays method is measured accurately, measurement of comparison after it need be sampled to dust, the very difficult on-line monitoring of realizing dust concentration; The piezoelectric crystal inductive method is applicable to the lower occasion of dust concentration on the ground, and requires operating personnel to have certain experience, thereby has influenced promoting the use of of it; Supercritical ultrasonics technology, microwave method are measured dust concentration and are in the experimental study stage.Optical method is subject to measure thing influence, and measures and make optical system contaminated easily, need often demarcate, and maintenance is big; It is bigger that electric charge induction is influenced by wind speed, and instrument is expensive.
Therefore, at present case, be badly in need of a kind of with low cost, accuracy is high and can carry out the method and apparatus that real-time dust concentration detects to site environment.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of dust concentration monitoring device based on the alternating electric field electric charge induction, adopt this monitoring device to monitor the dust concentration in operation place timely and effectively, and better grasp the dust concentration situation, personal safety is ensured with environmental quality be improved.
For achieving the above object, the utility model provides following technical scheme:
The utility model provides a kind of dust concentration monitoring device based on the alternating electric field electric charge induction, comprises for electric-field sensor, signal amplification circuit, filtering circuit, signals collecting and processing unit, driving circuit, core processing unit and the display device of surveying dust; Described electric-field sensor comprises two battery lead plates that are oppositely arranged, be added with the low-frequency ac electric field thereon, battery lead plate is provided with the lead for output voltage signal, the voltage signal of output is amplified into filtering circuit through signal amplification circuit, signal enters signals collecting and processing unit after handling through filtering, signal through acquisition process is transferred into core processing unit, core processing unit carries out analyzing and processing to this signal and obtains dust concentration, and concentration value is sent to display device shows.
Further, described electric-field sensor adopts half-cylindrical electric-field sensor, its two electrode plate is two semicircular sheet metals that are oppositely arranged, two electrode plate are separately fixed at the inwall of circular pipe, this circular pipe is filled with dielectric as insulation screen between battery lead plate and the circular pipe inwall.
Further, described battery lead plate adopts the red copper material to make, and its length is 50cm, and diameter is 10cm, and thickness is 1mm, and the gap central angle between two battery lead plates is 1 °-2 °.
Further, described circular pipe adopts the hollow rubber cylinder, and its thickness is 1.5-2cm; Described dielectric adopts the material that dielectric coefficient is constant and energy is high pressure resistant, and its thickness is 2-3cm.
Further, described dust concentration monitoring device also comprises warning device.
Further, described core processing unit adopts single-chip microcomputer.
The beneficial effects of the utility model are: dust concentration monitoring device described in the utility model is simple in structure, easy to implement, when reducing the device manufacturing cost, can guarantee the accuracy of monitoring result, this device can be monitored the dust concentration in operation place timely and effectively, and better grasp the dust concentration situation, personal safety is ensured with environmental quality be improved.
Description of drawings
In order to make the purpose of this utility model, technical scheme and beneficial effect clearer, the utility model provides following accompanying drawing to describe:
Fig. 1 is the structural representation of monitoring device described in the utility model;
Fig. 2 is a kind of electric-field sensor synoptic diagram;
Fig. 3 is the structured flowchart of monitoring device described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
Fig. 1 is the structural representation of monitoring device described in the utility model, as shown in the figure, based on the dust concentration monitoring device of alternating electric field electric charge induction, comprise for electric-field sensor, signal amplification circuit, filtering circuit, signals collecting and processing unit, driving circuit, core processing unit and the display device of surveying dust; Described electric-field sensor comprises two battery lead plates that are oppositely arranged, be added with the low-frequency ac electric field thereon, battery lead plate is provided with the lead for output voltage signal, the voltage signal of output is amplified into filtering circuit through signal amplification circuit, signal enters signals collecting and processing unit after handling through filtering, signal through acquisition process is transferred into core processing unit, core processing unit carries out analyzing and processing to this signal and obtains dust concentration, and concentration value is sent to display device shows.
In the utility model, adopt electric-field sensor that dust is surveyed, in the place that need monitor dust concentration, settle some electric-field sensors in the zone that needs are monitored, in the present embodiment, electric-field sensor adopts half-cylindrical electric-field sensor, its two electrode plate is two semicircular sheet metals that are oppositely arranged, two electrode plate are separately fixed at the inwall of circular pipe, this circular pipe is filled with dielectric as insulation screen between battery lead plate and the circular pipe inwall.
After semicircle column type sensor added alternating electric field, the surface charge amount on the semi-cylindrical electrode plate was directly proportional with the electric field intensity of center:
Wherein: K is scale-up factor; Q is the quantity of electric charge; E is electric field intensity;
These induced charges will be at the natural capacity C of sensor
XSmall voltage of last generation is:
Substitution formula (1) can get:
Can be drawn the natural capacity C of sensor again by analysis of experimental data
Xρ is directly proportional with dust concentration, and uses the mathematical induction can derived expression:
ρ is dust concentration, and ε is a proportionality constant, can experiment obtain;
(4) substitution (3) can get:
By measuring the voltage U on the natural capacity
XJust can obtain ρ, electric-field sensor basic principle of measurement that Here it is.
In the present embodiment, battery lead plate adopts the red copper material to make, and its length is 50cm, and diameter is 10cm, and thickness is 1mm, and the gap central angle between two battery lead plates is 1 °-2 °.Circular pipe adopts the hollow rubber cylinder, and its thickness is 1.5-2cm; Described dielectric adopts the material that dielectric coefficient is constant and energy is high pressure resistant, and its thickness is 2-3cm.
When dust passed through electric-field sensor, the electric capacity between the battery lead plate of sensor can change, thereby the voltage between two battery lead plates changes; Voltage signal between battery lead plate is exported by lead, the voltage signal of output at first carries out amplification filtering through signal amplification circuit and filtering circuit, gather and processing unit through the signal entering signal after the amplification filtering processing, through being fed through core processing unit after collection and the analog-to-digital conversion process, core processing unit adopts single-chip microcomputer in the present embodiment, single-chip microcomputer is sampled to data, the data that collect are averaged, then the average voltage that obtains being imported the computing formula of deriving (5) calculates, obtain the dust concentration measured value, simultaneously, single-chip microcomputer is exported demonstration with the concentration value that obtains, so that the staff understands on-the-spot dust concentration situation in real time.
As further improvement of this embodiment, this monitoring device also includes warning device, and when on-the-spot dust concentration reached default warning value, the Single-chip Controlling warning device was reported to the police, in order to remind the staff to note dangerous situation.
Explanation is at last, above preferred embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from the utility model claims institute restricted portion.
Claims (6)
1. the dust concentration monitoring device based on the alternating electric field electric charge induction is characterized in that: comprise for electric-field sensor, signal amplification circuit, filtering circuit, signals collecting and processing unit, driving circuit, core processing unit and the display device of surveying dust;
Described electric-field sensor comprises two battery lead plates that are oppositely arranged, be added with the low-frequency ac electric field thereon, battery lead plate is provided with the lead for output voltage signal, the voltage signal of output is amplified into filtering circuit through signal amplification circuit, signal enters signals collecting and processing unit after handling through filtering, signal through acquisition process is transferred into core processing unit, core processing unit carries out analyzing and processing to this signal and obtains dust concentration, and concentration value is sent to display device shows.
2. the dust concentration monitoring device based on the alternating electric field electric charge induction according to claim 1, it is characterized in that: described electric-field sensor adopts half-cylindrical electric-field sensor, its two electrode plate is two semicircular sheet metals that are oppositely arranged, two electrode plate are separately fixed at the inwall of circular pipe, this circular pipe is filled with dielectric as insulation screen between battery lead plate and the circular pipe inwall.
3. the dust concentration monitoring device based on the alternating electric field electric charge induction according to claim 2, it is characterized in that: described battery lead plate adopts the red copper material to make, and its length is 50cm, and diameter is 10cm, thickness is 1mm, and the gap central angle between two battery lead plates is 1 °-2 °.
4. the dust concentration monitoring device based on the alternating electric field electric charge induction according to claim 3 is characterized in that: described circular pipe adopts the hollow rubber cylinder, and its thickness is 1.5-2cm; Described dielectric adopts the material that dielectric coefficient is constant and energy is high pressure resistant, and its thickness is 2-3cm.
5. the dust concentration monitoring device based on the alternating electric field electric charge induction according to claim 1, it is characterized in that: described dust concentration monitoring device also comprises warning device.
6. according to each described dust concentration monitoring device based on the alternating electric field electric charge induction in the claim 1 to 5, it is characterized in that: described core processing unit adopts single-chip microcomputer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320148256 CN203132964U (en) | 2013-03-28 | 2013-03-28 | Dust concentration monitoring device based on charge induction of alternating electric field |
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| CN 201320148256 CN203132964U (en) | 2013-03-28 | 2013-03-28 | Dust concentration monitoring device based on charge induction of alternating electric field |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234879A (en) * | 2013-03-28 | 2013-08-07 | 重庆大学 | Dust concentration monitoring apparatus based on alternating electric field charge induction and method |
| CN104062211A (en) * | 2014-07-04 | 2014-09-24 | 苏州科技学院 | Rapid measuring device for air dust |
| CN106680165A (en) * | 2016-12-29 | 2017-05-17 | 北京奥本中仪自控工程有限公司 | Portable particulate matter concentration monitoring instrument |
| CN107167402A (en) * | 2016-03-08 | 2017-09-15 | 福特环球技术公司 | The method and system sensed for exhaust particulate matter |
| CN110261268A (en) * | 2019-06-24 | 2019-09-20 | 重庆邮电大学 | A kind of on-Line Monitor Device and its assembly method of metallic particles |
| CN110333171A (en) * | 2019-08-12 | 2019-10-15 | 山东科技大学 | Coal handling system transfer point dust concentration detecting method and system |
-
2013
- 2013-03-28 CN CN 201320148256 patent/CN203132964U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234879A (en) * | 2013-03-28 | 2013-08-07 | 重庆大学 | Dust concentration monitoring apparatus based on alternating electric field charge induction and method |
| CN104062211A (en) * | 2014-07-04 | 2014-09-24 | 苏州科技学院 | Rapid measuring device for air dust |
| CN107167402A (en) * | 2016-03-08 | 2017-09-15 | 福特环球技术公司 | The method and system sensed for exhaust particulate matter |
| CN106680165A (en) * | 2016-12-29 | 2017-05-17 | 北京奥本中仪自控工程有限公司 | Portable particulate matter concentration monitoring instrument |
| CN110261268A (en) * | 2019-06-24 | 2019-09-20 | 重庆邮电大学 | A kind of on-Line Monitor Device and its assembly method of metallic particles |
| CN110261268B (en) * | 2019-06-24 | 2022-02-18 | 重庆邮电大学 | Online monitoring device for metal particles and assembling method thereof |
| CN110333171A (en) * | 2019-08-12 | 2019-10-15 | 山东科技大学 | Coal handling system transfer point dust concentration detecting method and system |
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Granted publication date: 20130814 Termination date: 20140328 |