CN106442249A - Dust detection device - Google Patents
Dust detection device Download PDFInfo
- Publication number
- CN106442249A CN106442249A CN201610970532.7A CN201610970532A CN106442249A CN 106442249 A CN106442249 A CN 106442249A CN 201610970532 A CN201610970532 A CN 201610970532A CN 106442249 A CN106442249 A CN 106442249A
- Authority
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- China
- Prior art keywords
- dust
- critesistor
- air
- gas channel
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000428 dust Substances 0.000 title claims abstract description 120
- 238000001514 detection method Methods 0.000 title claims abstract description 75
- 230000005611 electricity Effects 0.000 claims description 5
- 230000008021 deposition Effects 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 241000883990 Flabellum Species 0.000 description 2
- 238000005276 aerator Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G01N15/075—
Abstract
The invention discloses a dust detection device. The dust detection device comprises a shell, a dust detection assembly and a flow speed sensor, wherein the shell is provided with a first gas inlet, a first gas outlet and a gas flow channel; the inner cavity of the shell is communicated with the external environment through the first gas inlet and the first gas outlet; the two ends of the gas flow channel are communicated with the first gas inlet and the first gas outlet correspondingly; the dust detection assembly is arranged on the shell; the detection end of the dust detection assembly is arranged opposite to the gas flow channel; the dust detection assembly is used for detecting the dust content of the air in the shell; and the flow speed sensor is arranged in the gas flow channel and is used for acquiring the flow speed of the air in the gas flow channel. The dust detection device can be used for judging the deposition quantity of the dust in the gas flow channel after the flow speed sensor acquires the air flow speed; and the dust detection device can be cleaned timely when judging that the deposition quantity of the dust in the gas flow channel is large so as to improve the dust content detection precision.
Description
Technical field
The present invention relates to dust detection technique field, especially relates to a kind of dust investigating.
Background technology
Dust investigating generally adopts light scattering principle, by laser or infrared ray radiation air particle, collects anti-
Optical signal after penetrating, calculates quantity or the concentration of particulate in air using Principle of Statistics.Traditional dust investigating
It is required to, with the gas channel for introducing finely ground particles air, by gas channel, the air containing particulate matter is fed through powder
The test side of dust sensor carries out illumination detection.However, after traditional dust investigating long-time use, holding in gas channel
Easily gather more dust, so will have influence on the degree of accuracy of the detection data of dust sensor.
Content of the invention
Based on this, the invention reside in overcoming the defect of prior art, a kind of dust inspection that can improve detection degree of accuracy is provided
Survey device.
Its technical scheme is as follows：Dust investigating, including：Housing, the housing is provided with the first air inlet, first gives vent to anger
Mouth and gas channel, the housing cavity is communicated with external environment by first air inlet, first gas outlet, described
Gas channel two ends are communicated with first air inlet, the first gas outlet respectively；Dust detection components, the dust detection components
Arrange on the housing, the test side of the dust detection components is oppositely arranged with the gas channel, the dust detection
Component is used for detecting the dust content of the air in the housing；And flow sensor, the flow sensor is arranged on described
In gas channel, the flow sensor is used for obtaining the air velocity in the gas channel.
Wherein in one embodiment, the dust investigating also includes Blast mechanism, and the Blast mechanism is used for will
The hull outside air is sent in the housing by first air inlet.
Wherein in one embodiment, the Blast mechanism is that piezoelectricity air pump, the piezoelectricity air pump is arranged on the housing
Inside, the piezoelectricity air pump has the second air inlet and the second gas outlet, second air inlet and the first air inlet phase
Logical, second gas outlet is communicated with the gas channel, and the dust detection components are located at the sidepiece of the gas channel.
Wherein in one embodiment, the housing is provided with open region, and the shell nozzle area is covered with control board,
The control board is electrically connected with the flow sensor, the dust detection components and the piezoelectricity air pump；The shell
Internal portion is equiped with fixed mount, and the fixed mount is used for for the dust detection components, the piezoelectricity air pump being fixed on the shell
In body, the fixed mount cooperatively forms the gas channel with the control board.
Wherein in one embodiment, the hull outside is connected with protection cap, and the protection cap covers at the control
Circuit board.
Wherein in one embodiment, the dust investigating also includes driving voltage judge module and alarm module,
The driving voltage judge module is connected with the driving power supply of the alarm module, the Blast mechanism, and the driving voltage is sentenced
Disconnected module is used for whether judging the driving voltage of the Blast mechanism more than the first preset value, the alarming device to be used for described
Actuation of an alarm is carried out when the driving voltage of piezoelectricity air pump is more than the first preset value.
Wherein in one embodiment, the dust investigating also includes air velocity judge module with driving voltage control
Molding block, the air velocity judge module is connected with the flow sensor, the driving voltage control module and the drum
The driving power supply of wind mechanism is connected, and whether the air velocity judge module is for judging the air velocity in the gas channel
More than the second preset value, the driving voltage control module is used for the air velocity in the gas channel and presets more than second
Reduce the driving voltage of the driving power supply during value.
Wherein in one embodiment, the air velocity judge module is additionally operable to judge the air in the gas channel
Whether flow velocity is less than the 3rd preset value, and the air velocity that the driving voltage control module is additionally operable in the gas channel is little
Increase the driving voltage of the driving power supply when three preset values.
Wherein in one embodiment, the flow sensor includes the first critesistor, the second critesistor and voltage
Detection module, first critesistor is connected in series in constant voltage power supply circuit with second critesistor, the voltage inspection
Surveying module is used for obtaining the first critesistor both end voltage or the second critesistor both end voltage, first heat
Quick resistance is successively set in the gas channel along airflow direction with second critesistor.
Wherein in one embodiment, the flow sensor includes the first critesistor, the second critesistor, potentiometer
With voltage detection module, first critesistor is connected in series in constant voltage power supply circuit with second critesistor, described
First critesistor is connected in parallel with two anchor leg ends of the potentiometer after being connected in series with second critesistor,
The voltage detection module is for obtaining the test lead between first critesistor and second critesistor, Yi Jisuo
The voltage between the movable leadframe end of potentiometer is stated, first critesistor is with second critesistor along airflow direction
It is successively set in the gas channel.
Below the advantage or principle of preceding solution is illustrated：
1st, above-mentioned dust investigating, after flow sensor gets air velocity, can be used to judge air-flow
Dust deposit amount in passage, when determining that in gas channel, dust deposit amount is more, just can be timely to dust detection dress
Putting carries out cleaning operation, to improve the degree of accuracy of dust content detection.
2nd, by piezoelectricity air pump, extraneous air being fed through in housing, gather dust is not easy in piezoelectricity air pump, so just
Easy deposition dust on the flabellum of traditional aerator can be overcome to cause the poor phenomenon of dust detection degree of accuracy, so that
Dust detection degree of accuracy is greatly improved.
3rd, housing is provided with open region.Shell nozzle area is covered with control board.Control board and flow sensor, powder
Dirt detection components and piezoelectricity air pump are electrically connected with.Enclosure interior is equiped with fixed mount.Fixed mount is used for dust detection components, pressure
Electrical pump is fixed in housing, and fixed mount cooperatively forms gas channel with control board.In this way, by control board with
In fixing dust detection components, piezoelectricity air pump fixed mount cooperatively forming gas channel so that dust investigating volume is to the greatest extent
Possible miniaturization, and the Detection results of dust are relatively stable.
4th, hull outside is connected with protection cap.Protection cap covers at control board.Protection cap is avoided that control board
Rubbed, equivalent damage is broken, control board can be played a protective role.
5th, dust investigating also includes driving voltage judge module and alarm module.The driving voltage judge module with
The alarm module, the driving power supply of the piezoelectricity air pump are connected.The driving voltage judge module is used for judging the piezoelectricity
Whether the driving voltage of air pump is more than the first preset value.The alarming device is used for being more than in the driving voltage of the piezoelectricity air pump
Actuation of an alarm is carried out during the first preset value.When driving voltage judge module, to determine the driving voltage of piezoelectricity air pump pre- more than first
If during value, then as long-time is using more dust has been gathered in explanation gas channel, the dust for gathering in gas channel is caused
Windage increases, and so just causes the driving voltage of piezoelectricity air pump to increase.Electric in the driving of the piezoelectricity air pump by alarming device
After actuation of an alarm being carried out when pressure is more than the first preset value, staff just can be timely notified to carry out clearly dust investigating
Science and engineering is made.
6th, after the air velocity in gas channel increases, control reduces the driving voltage of piezoelectricity air pump, makes piezoelectricity air pump
The air mass flow being sent in housing is reduced.And after working as the minimizing of the air velocity in gas channel, control rises high-voltage electrical apparatus pump
Driving voltage, makes voltage electrical be pumped into the increase of the air mass flow in housing.In this way, spray in the voltage electrical infusion pump unit time can be caused
The gas flow for going out is consistent all the time, so that it is guaranteed that the degree of accuracy of dust investigating dust content detection.
Description of the drawings
Fig. 1 is the one of which structural representation of the dust investigating described in the embodiment of the present invention；
Fig. 2 is the one of which structural representation of the dust investigating described in the embodiment of the present invention；
Fig. 3 is the one of which structural representation of the dust investigating described in the embodiment of the present invention；
Fig. 4 is the one of which structural representation of flow sensor in the dust investigating described in the embodiment of the present invention；
Fig. 5 is the one of which structural representation of flow sensor in the dust investigating described in the embodiment of the present invention.
Description of reference numerals：
10th, housing, the 11, first air inlet, the 12, first gas outlet, 13, gas channel, 14, open region, 20, voltage electrical
Pump, the 21, second air inlet, the 22, second gas outlet, 30, dust detection components, 40, flow sensor, the 41, first critesistor,
42nd, the second critesistor, 43, voltage detection module, 44, potentiometer, 50, control board, 60, fixed mount, 70, protection cap.
Specific embodiment
Below embodiments of the invention are described in detail：
As shown in figure 1, the dust investigating described in the embodiment of the present invention, including：Housing 10, dust detection components 30 and
Flow sensor 40.The housing 10 is provided with the first air inlet 11, the first gas outlet 12 and gas channel 13.In the housing 10
Chamber is communicated with external environment by first air inlet 11, first gas outlet 12.13 two ends of the gas channel are respectively
Communicate with first air inlet 11, the first gas outlet 12.The dust detection components 30 are arranged on the housing 10, described
The test side of dust detection components 30 is oppositely arranged with the gas channel 13, and the dust detection components 30 are described for detecting
The dust content of the air in housing 10.The flow sensor 40 is arranged in the gas channel 13, the flow-velocity sensing
Device 40 is used for obtaining the air velocity in the gas channel 13.Dust detection components 30 in the present embodiment can adopt laser
Or infrared detection component.
Above-mentioned dust investigating, after flow sensor 40 gets air velocity, can be used to judge air-flow
Dust deposit amount in passage 13, when determining that in gas channel 13, dust deposit amount is more, just timely can examine to dust
Surveying device carries out cleaning operation, to improve the degree of accuracy of dust content detection.
The dust investigating also includes Blast mechanism.The Blast mechanism is used for leading to 10 extraneous air of the housing
Cross first air inlet 11 to be sent in the housing 10.
The Blast mechanism is piezoelectricity air pump 20.The piezoelectricity air pump 20 is arranged on inside the housing 10, the piezoelectricity
Air pump 10 has the second air inlet 21 and the second gas outlet 22.Second air inlet 21 is communicated with first air inlet 11,
Second gas outlet 22 is communicated with the gas channel 13.The dust detection components are located at the side of the gas channel 13
Portion.By way of piezoelectricity air pump 20 in the present embodiment mainly expands or shrinks pump chamber inner chamber body when vibrational structure works
Extraneous air is fed through in the housing 10 of dust investigating.Specifically, in pump chamber inner chamber body expansion process, dust detection dress
The air for putting outside is drawn in pump chamber by the first air inlet 11, the second air inlet 21；During pump chamber inner chamber body reduces, pump
Room air is expelled in the housing 10 of dust investigating by exhaust passage and the second gas outlet 22.The dust detection
Component 30 is used for detecting the dust content of the air in the housing 10.
By piezoelectricity air pump 20, extraneous air is fed through in housing 10, in piezoelectricity air pump 20, gather dust is not easy to, this
Sample just can overcome easy deposition dust on the flabellum of traditional aerator to cause the poor phenomenon of dust detection degree of accuracy, so as to
So that dust detection degree of accuracy is greatly improved.
When air containing particulate matter flows through gas channel 13, the test side of dust detection components 30 passes through the laser of transmitting
Or the particulate matter of infrared ray radiation in the air, and the optical signal after reflection is collected, in the air is calculated using Principle of Statistics
The quantity or concentration of grain thing.Position of the dust detection components 30 in housing 10 can be arranged (as Fig. 2 institute according to practical situation
Show, Fig. 2 is the embodiment that the position in the housing 10 of dust detection components 30 is different from dust investigating described in Fig. 1).
Fig. 3 is referred to, in the housing 10, is provided with open region 14.10 open region 14 of the housing is covered with control board
50.The control board 50 is electrical with the flow sensor 40, the dust detection components 30 and the piezoelectricity air pump 20
Connection.Fixed mount 60 is equiped with inside the housing 10.The fixed mount 60 is used for the dust detection components 30, the pressure
Electrical pump 20 is fixed in the housing 10, and the fixed mount 60 cooperatively forms the gas channel with the control board 50
13.In this way, by control board 50 with fixed mount 60 for fixing dust detection components 30, piezoelectricity air pump 20 coordinating shape
Become gas channel 13 so that dust investigating volume miniaturization as far as possible, and the Detection results of dust are relatively stable.
The housing 10 is externally connected to protection cap 70.The protection cap 70 covers at the control board 50.Protection
Lid 70 is avoided that control board 50 is rubbed, breaks equivalent damage, and control board 50 can be played a protective role.
Dust investigating also includes driving voltage judge module and alarm module.The driving voltage judge module and institute
State alarm module, the driving power supply of the piezoelectricity air pump 20 is connected.The driving voltage judge module is used for judging the piezoelectricity
Whether the driving voltage of air pump 20 is more than the first preset value.The alarming device is used for the driving voltage in the piezoelectricity air pump 20
More than carrying out actuation of an alarm during the first preset value.First preset value can be according in practical situation, and air velocity is subject to larger resistance
During power, the driving voltage value relative set of corresponding piezoelectricity air pump 20, is not repeated.When driving voltage judge module is determined
When the driving voltage of piezoelectricity air pump 20 is more than the first preset value, then gather relatively as long-time is used in explanation gas channel 13
Many dusts, the dust for gathering in gas channel 13 causes windage to increase, and so just causes the driving voltage of piezoelectricity air pump 20 to increase.
By alarming device the piezoelectricity air pump 20 driving voltage more than the first preset value when carry out actuation of an alarm after, just can and
When the staff that notifies cleaning work is carried out to dust investigating.
Dust investigating also includes air velocity judge module with driving voltage control module.The air velocity judges
Module is connected with the flow sensor 40.The driving power supply phase of the driving voltage control module and the piezoelectricity air pump 20
Even.The air velocity judge module is used for judging whether the air velocity in the gas channel 13 is more than the second preset value.
It is described more than reducing during the second preset value that the driving voltage control module is used for the air velocity in the gas channel 13
The driving voltage of driving power supply.The air velocity judge module is additionally operable to judge that the air velocity in the gas channel 13 is
No it is less than the 3rd preset value.Second preset value, the 3rd preset value can be according to the corresponding piezoelectricity of actually required air velocity
The driving voltage value of air pump 20 carries out relative set.The driving voltage control module is additionally operable in the gas channel 13
Increase the driving voltage of the driving power supply when air velocity is less than three preset values.In this way, when the air in gas channel 13
After flow velocity increases, control reduces the driving voltage of piezoelectricity air pump 20, the air mass flow for making piezoelectricity air pump 20 be sent in housing 10
Reduce.And after working as the minimizing of the air velocity in gas channel 13, control rises the driving voltage of high-voltage electrical apparatus pump 20, piezoelectricity air pump is made
20 are sent to the air mass flow in housing 10 increases.In this way, the gas flow for spraying in 20 unit interval of piezoelectricity air pump can be caused
All the time consistent, so that it is guaranteed that the degree of accuracy of dust investigating dust content detection.
In the present embodiment, the driving voltage judge module, the alarm module, the air velocity judge module and institute
State driving voltage control module and be arranged at the control board 50.In this way, dust investigating small volume can be caused as far as possible
Type, and it is easy to assembly and disassembly.
Fig. 4 is referred to, the flow sensor 40 includes the first critesistor 41, the second critesistor 42 and voltage detecting
Module 43.First critesistor 41 is connected in series in constant voltage power supply circuit with second critesistor 42, and the first heat
Quick resistance 41 and the second critesistor 42 are the critesistor of positive temperature coefficient.The voltage detection module 43 is described for obtaining
First critesistor, 41 both end voltage or 42 both end voltage of the second critesistor.First critesistor 41 with described
Second critesistor 42 is successively set in the gas channel 13 along airflow direction.Air velocity in gas channel 13
After increase, the first critesistor 41 can be increased with the resistance difference of the second critesistor 42, the electricity that voltage detection module 43 is detected
Pressure will change, and reduce the driving voltage of piezoelectricity air pump 20 according to the voltage control that voltage detection module 43 is detected, make pressure
Electrical pump 20 is sent to the air mass flow in housing 10 to be reduced.And after working as the minimizing of the air velocity in gas channel 13, the first heat
Quick resistance 41 can diminish with the resistance difference of the second critesistor 42, and the voltage that voltage detection module 43 is detected can equally become
Changing, the driving voltage of high-voltage electrical apparatus pump 20 is risen according to the voltage control that voltage detection module 43 is detected, sends into piezoelectricity air pump 20
Air mass flow in housing 10 increases.In this way, regardless of dust investigating external environment condition, 20 unit interval of piezoelectricity air pump
The gas flow of interior ejection is consistent all the time, so that it is guaranteed that the degree of accuracy of dust investigating dust content detection.
Fig. 5 is referred to, in another middle one embodiment, the flow sensor 40 includes the first critesistor 41, second
Critesistor 42, potentiometer 44 and voltage detection module 43.First critesistor 41 is gone here and there with second critesistor 42
Connection is connected in constant voltage power supply circuit.First critesistor 41 be connected in series with second critesistor 42 after with the electricity
Two anchor leg ends of position device 44 are connected in parallel.The voltage detection module 43 be used for obtaining first critesistor 41 with
Test lead between second critesistor 42 and the voltage between the movable leadframe end of the potentiometer 44.Described
One critesistor 41 is successively set in the gas channel 13 along airflow direction with second critesistor 42.Work as bridge
After energising, the first critesistor 41 and the second critesistor 42 are due to heating, and temperature rises, and cause which to flow through electric current minimizing, directly
To reaching balance.Now regulator potentiometer 44, it is zero to make bridge output voltage.When in gas channel 13, fluid starts flowing,
On fluid first critesistor 41 of public attention due to faster heat dissipation temperature can be lower than the temperature of second critesistor 42 of lower public attention,
Cause electric bridge unbalance, and in gas channel 13, fluid-flow rate is bigger, electric bridge imbalance degree is bigger.By voltage detecting mould
Block 43 measures the voltage imbalance numerical value of bridge, just can measure the temperature difference of two resistance, so measurable go out gas channel
Rate of flow of fluid in 13.
Each technical characteristic of embodiment described above arbitrarily can be combined, for making description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore can not be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, can also make some deformation and improve, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. dust investigating, it is characterised in that include：
Housing, the housing is provided with the first air inlet, the first gas outlet and gas channel, and the housing cavity passes through described first
Air inlet, first gas outlet are communicated with external environment, the gas channel two ends respectively with first air inlet, first
Gas outlet communicates；
Dust detection components, the dust detection components are arranged on the housing, the test side of the dust detection components with
The gas channel is oppositely arranged, and the dust detection components are used for detecting the dust content of the air in the housing；And
Flow sensor, the flow sensor is arranged in the gas channel, and the flow sensor is described for obtaining
Air velocity in gas channel.
2. dust investigating according to claim 1, it is characterised in that also include Blast mechanism, the Blast mechanism
For the hull outside air is sent in the housing by first air inlet.
3. dust investigating according to claim 2, it is characterised in that the Blast mechanism is piezoelectricity air pump, described
Piezoelectricity air pump is arranged on the enclosure interior, and the piezoelectricity air pump has the second air inlet and the second gas outlet, and described second enters
QI KOU is communicated with first air inlet, and second gas outlet is communicated with the gas channel, the dust detection components position
Sidepiece in the gas channel.
4. dust investigating according to claim 3, it is characterised in that the housing is provided with open region, the housing
Open region is covered with control board, the control board and the flow sensor, dust detection components and described
Piezoelectricity air pump is electrically connected with；The enclosure interior is equiped with fixed mount, and the fixed mount is used for the dust detection components, institute
State piezoelectricity air pump to be fixed in the housing, the fixed mount cooperatively forms the gas channel with the control board.
5. dust investigating according to claim 4, it is characterised in that the hull outside is connected with protection cap, institute
State protection cap and cover at the control board.
6. dust investigating according to claim 2, it is characterised in that also include driving voltage judge module and warning
Module, the driving voltage judge module is connected with the driving power supply of the alarm module, the Blast mechanism, the driving electricity
Pressure judge module is used for whether judging the driving voltage of the Blast mechanism more than the first preset value, the alarming device to be used for
Actuation of an alarm is carried out when the driving voltage of the piezoelectricity air pump is more than the first preset value.
7. the dust investigating according to any one of claim 2～6, it is characterised in that also include that air velocity judges
Module and driving voltage control module, the air velocity judge module is connected with the flow sensor, the driving voltage
Control module is connected with the driving power supply of the Blast mechanism, and the air velocity judge module is used for judging the gas channel
In air velocity whether be more than the second preset value, the driving voltage control module is used for the air in the gas channel
Reduce the driving voltage of the driving power supply when flow velocity is more than the second preset value.
8. dust investigating according to claim 7, it is characterised in that the air velocity judge module is additionally operable to sentence
Whether the air velocity for breaking in the gas channel is less than the 3rd preset value, and the driving voltage control module is additionally operable to described
Increase the driving voltage of the driving power supply when air velocity in gas channel is less than three preset values.
9. dust investigating according to claim 1, it is characterised in that the flow sensor includes the first temperature-sensitive electricity
Resistance, the second critesistor and voltage detection module, first critesistor is connected in series in perseverance with second critesistor
In source circuit, the voltage detection module is used for obtaining the first critesistor both end voltage or second temperature-sensitive electricity
Resistance both end voltage, first critesistor is successively set on the air-flow with second critesistor along airflow direction and leads to
In road.
10. dust investigating according to claim 1, it is characterised in that the flow sensor includes the first temperature-sensitive
Resistance, the second critesistor, potentiometer and voltage detection module, first critesistor is connected with second critesistor
Be connected in constant voltage power supply circuit, first critesistor be connected in series with second critesistor after with the potentiometer
Two anchor leg ends are connected in parallel, and the voltage detection module is used for obtaining first critesistor with second temperature-sensitive
Test lead between resistance and the voltage between the movable leadframe end of the potentiometer, first critesistor with described
Second critesistor is successively set in the gas channel along airflow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610970532.7A CN106442249B (en) | 2016-10-27 | 2016-10-27 | Dust detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610970532.7A CN106442249B (en) | 2016-10-27 | 2016-10-27 | Dust detection device |
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| CN106442249B CN106442249B (en) | 2024-03-22 |
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| WO2018076405A1 (en) * | 2016-10-27 | 2018-05-03 | 广东奥迪威传感科技股份有限公司 | Dust measurement device |
| CN109425744A (en) * | 2017-08-21 | 2019-03-05 | 研能科技股份有限公司 | Have the portable electronic devices of actuation sensor module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018076405A1 (en) * | 2016-10-27 | 2018-05-03 | 广东奥迪威传感科技股份有限公司 | Dust measurement device |
| CN109425744A (en) * | 2017-08-21 | 2019-03-05 | 研能科技股份有限公司 | Have the portable electronic devices of actuation sensor module |
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| CN106442249B (en) | 2024-03-22 |
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