CN105866036A - Air pollutant concentration detection device - Google Patents
Air pollutant concentration detection device Download PDFInfo
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- CN105866036A CN105866036A CN201610244684.9A CN201610244684A CN105866036A CN 105866036 A CN105866036 A CN 105866036A CN 201610244684 A CN201610244684 A CN 201610244684A CN 105866036 A CN105866036 A CN 105866036A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
- G01N2021/1704—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids in gases
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses an air pollutant concentration detection device and belongs to the technical field of optics. The device comprises a case, and a detection signal transmitting component, a signal reflecting component and a detection signal receiving component which are sequentially arranged at an interval in the case; the detection signal transmitting component is used for transmitting a detection signal to the signal reflecting component; the signal reflecting component is used for reflecting the received detection signal to the detection signal receiving component; the detection signal receiving component is used for receiving the detection signal reflected by the signal reflecting component and determining concentration of air pollutants according to the received reflected detection signal. The transmission path of the detection signal is changed through the signal reflecting component, the effect of reducing the space occupied by the air pollutant concentration detection device is realized on the premise that the detection accuracy of the concentration of the air pollutants is guaranteed, and the problem that the detection device occupies a greater space in the prior art is solved. The air pollutant concentration detection device is used for detecting the concentration of the air pollutants.
Description
Technical field
The present invention relates to optical technical field, particularly to a kind of air pollutant concentration detection device.
Background technology
Along with industrialized fast development, sulfur dioxide, nitrogen oxides and the pellet etc. in air
The concentration of pollutant increases the most therewith.Pollutants in air concentration is detected in real time, can obtain in time
Current air pollution degree, daily routines and trip for people provide and instruct.
In correlation technique, the detection method of air pollutant concentration is mainly weight method, uses weight method to carry out
Detection device required during detection mainly includes sampler, filtering chamber, filter membrane and assembly etc. of weighing.
When detection, need to extract quantitative air by sampler, and this air be delivered in filtering chamber,
Then the air of extraction is filtered by the filter membrane by being arranged in filtering chamber, and pollutant is trapped in filter
On film, finally according to filter membrane of poor quality before and after filtering and the volume of air that extracted, can calculate
The concentration of pollutants in air.
But, the detection device in correlation technique, in order to ensure that filter membrane contacts with the effective of air pollutants, carries
The volume of the accuracy of detection of high pollution substrate concentration, filtering chamber and filter membrane is generally large so that detection device accounts for
Relatively big with space, use flexibility relatively low.
Summary of the invention
Take up room relatively big to solve detection device in correlation technique, use the problem that flexibility is relatively low, this
Invention provides a kind of air pollutant concentration detection device.Described technical scheme is as follows:
The invention provides a kind of air pollutant concentration detection device, described device includes:
Housing and in described housing the most spaced detection signal transmission component, signal reflex assembly
With detection signal receiving assembly；
Described detection signal transmission component, for launching detection signal to described signal reflex assembly；
Described signal reflex assembly, for connecing the described detection signal reflex received to described detection signal
Receive assembly；
Described detection signal receiving assembly is for receiving the detection signal of described signal reflex assembly reflection, and root
Detection signal according to the described reflection received determines the concentration of air pollutants.
Optionally, the shape of described housing and the transmission route matching of described detection signal.
Optionally, described detection signal transmission component includes:
Lasing light emitter and chopper；
Described lasing light emitter for launching the monochromatic light of predeterminated frequency to described chopper；
Described chopper for being modulated into alternation light by described monochromatic light, and launches to described signal reflex assembly
Described alternation light.
Optionally, described signal reflex assembly is reflective mirror, and described reflective mirror is for reflecting described alternation light
To described detection signal receiving assembly, described alternation light is during transmission, it is possible to send out with air pollutants
Raw reaction also produces photoacoustic signal.
Optionally, described detection signal receiving assembly includes:
Photoacoustic signal collector, amplifying circuit and analog digital A/D converting circuit；
Described photoacoustic signal collector is connected with described amplifying circuit, and described photoacoustic signal collector is used for gathering
Photoacoustic signal, and the described photoacoustic signal collected is sent to described amplifying circuit；
Described amplifying circuit is connected with described A/D convertor circuit, and described amplifying circuit is used for amplifying described optoacoustic
Signal, and the described photoacoustic signal after amplifying sends to described A/D convertor circuit；
The described A/D convertor circuit described photoacoustic signal after amplifying is converted to data signal, and detects
The voltage of described data signal, according to the corresponding relation of default voltage Yu pollutant levels, by described numeral
Pollutant levels corresponding to the voltage of signal are defined as the concentration of air pollutants.
Optionally, described housing being provided with at least one through hole, described through hole is for by described housing
Chamber is in communication with the outside.
Optionally, in described housing, described detection signal transmission component and described detection signal receiving assembly it
Between be provided with air-containing chamber, described air-containing chamber is in communication with the outside by least one through hole described；
The reflecting surface of described signal reflex assembly is positioned at described air-containing chamber, described air-containing chamber
The side of described detection signal transmission component is provided with entrance aperture, and described air-containing chamber is near described
The side of detection signal receiving assembly is provided with perforation hole, and described detection signal transmission component can be by described
Described detection signal is launched to described signal reflex assembly by entrance aperture, and described signal reflex assembly can pass through
The described detection signal reflex extremely described detection signal receiving assembly that described perforation hole will receive.
Optionally, described device also includes: prompting assembly；
Described prompting assembly is connected with described detection signal receiving assembly, and described prompting assembly is for carrying to user
Show the concentration of air pollutants determined by described detection signal receiving assembly.
Optionally, described device also includes: communications component；
Described communications component is connected with described detection signal receiving assembly, for by described detection signal reception group
The concentration of air pollutants determined by part sends to terminal.
Optionally, described device also includes: switch module；
Described switch module is connected with described detection signal transmission component, is used for controlling described detection signal and launches
Assembly sends detection signal.
Optionally, the transmitting direction of described detection signal with the angle of the reflecting surface of described signal reflex assembly is
45 degree, the receiving side signal of described detection signal receiving assembly to the reflecting surface of described signal reflex assembly
Angle is 45 degree.
Optionally, described housing be shaped as inverted V-shaped；The mistake for connecting lanyard it is provided with on described housing
Hole.
The technical scheme that the embodiment of the present invention provides has the benefit that
The invention provides a kind of air pollutant concentration detection device, except including detection letter in this device
Number emitting module and detection signal receiving assembly, also include signal reflex assembly, and this signal reflex assembly can
By the detection signal reflex received to detecting signal receiving assembly, thus extend the transmission of this detection signal
Path, it is ensured that detection signal effectively contacts with air pollutants, it is achieved that ensureing that air pollutants are dense
On the premise of the accuracy of detection of degree, reduce the effect that air pollutant concentration detection device is taken up space, carry
The high use flexibility of air pollutant concentration detection device.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of air pollutant concentration detection device that the embodiment of the present invention provides
Figure；
Fig. 2 is the structural representation of the another kind of air pollutant concentration detection device that the embodiment of the present invention provides
Figure；
Fig. 3 is the structural representation of another air pollutant concentration detection device that the embodiment of the present invention provides
Figure；
Fig. 4 is the structural representation of another air pollutant concentration detection device that the embodiment of the present invention provides
Figure.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Embodiment is described in further detail.
Fig. 1 is the structural representation of a kind of air pollutant concentration detection device that the embodiment of the present invention provides
Figure, sees Fig. 1, and this device may include that housing 10 and the most spaced inspection in this housing 10
Survey signal transmission component 20, signal reflex assembly 30 and detection signal receiving assembly 40.
This detection signal transmission component 20, for launching detection signal to this signal reflex assembly 30；This signal
Reflection subassembly 30, this detection signal reflex being used for receiving is to this detection signal receiving assembly 40；This inspection
Survey signal receiving assembly 40 and be used for receiving the detection signal of this signal reflex assembly 30 reflection, and according to reception
To the detection signal of this reflection determine the concentration of air pollutants.
In sum, a kind of air pollutant concentration detection device, this device are embodiments provided
In except include detect signal transmission component and detection signal receiving assembly, also include signal reflex assembly, should
Signal reflex assembly by the detection signal reflex received to detecting signal receiving assembly, thus can extend
The transmission path of this detection signal, it is ensured that detection signal effectively contacts with air pollutants, it is achieved that
On the premise of ensureing the accuracy of detection of air pollutant concentration, reduce air pollutant concentration and detect device institute
The effect taken up space, improves the use flexibility of air pollutant concentration detection device.
It should be noted that in embodiments of the present invention, this housing is non-fully seal, and air can lead to
Cross the gap on housing or hole etc. and enter into enclosure interior, thus realize housing and extraneous connection, with
Ensure that outside air can enter into the inside of this housing.
Optionally, the shape of this housing 10 can be with the transmission route matching of detection signal, such as, with reference to figure
1, this detection signal is after signal reflex assembly 30 reflects, and the transmission path of detection signal is inverted V-shaped,
Therefore the shape of this housing 10 can also be inverted V-shaped so that the space in this housing can be fully utilized,
Avoid the waste in space in housing, further reduce the volume of this air pollutant concentration detection device.
Fig. 2 is the structural representation of the another kind of air pollutant concentration detection device that the embodiment of the present invention provides
Figure, with reference to Fig. 2, this housing 10 is also provided with at least one through hole 101, such as, in Fig. 2 institute
In the device shown, this housing 10 being provided with a through hole 101, this housing 10 can be by this through hole 101
It is in communication with the outside, equal with the external world to ensure the pollutant levels of air that shell vivo detection signal contacted,
Guarantee the accuracy of detection of this air pollutant concentration detection device.
It should be noted that due to some pollutant in air it is possible that sedimentation phenomenon, in order to ensure
Detection signal effectively contacts with air pollutants, can make this at least one through hole side of setting on housing
Position, be positioned vertically higher than this detection signal transmission component arranges orientation.Such as, shown in Fig. 2
In device, this through hole 101 can be arranged on housing the position corresponding with signal reflex assembly 30.
Also, it should be noted in actual applications, owing to user can carry with or wear this air
Pollutant levels detection device, in order to avoid the healthy of user is impacted by detection signal, can be by
This through hole is arranged on this housing side away from user's body, and can be set to by this through hole horn-like, i.e.
This through hole is less near the aperture of one end of enclosure interior, relatively big near the aperture of one end of hull outside, from
And the leakage of shell vivo detection signal can be prevented effectively from, it is ensured that user's is healthy not by this detection signal
Impact.
Further, as in figure 2 it is shown, this detection signal transmission component 20 may include that lasing light emitter 201
With chopper 202.
This lasing light emitter 201 for launching the monochromatic light of predeterminated frequency to this chopper 202；This chopper 202
For this monochromatic light being modulated into alternation light, and launch this alternation light to this signal reflex assembly 30.
In embodiments of the present invention, due to the gas molecule in air, the electromagnetic wave of infrared band had selection
Property absorb feature, therefore can use infrared laser source to launch the wavelength monochromatic light at infrared band, and
And in view of the portability of whole detection device, this lasing light emitter can use miniature laser source.Chopper 202
After receiving this monochromatic light, this continuous print monochromatic light can be modulated into alternation light, alternation light refers to necessarily
The light of cycle discontinuous transmission, and the breaking time of this alternation light is equal to the printing opacity time, in embodiments of the present invention,
The frequency of this alternation light can be 10 hertz (HZ) to 15HZ.Wherein, this chopper 202 can be electricity
The fan-type wheel blade of control formula, this chopper by the voltage duty cycle of Single-chip Controlling motor, and then can be controlled
The rotating speed of motor processed so that fan-type wheel blade, under certain rotating speed, chops into continuous print monochromatic light off intermittent light.
Optionally, with reference to Fig. 2, this signal reflex group 30 can be reflective mirror, and this reflective mirror is for by this friendship
Darkening reflexes to detect signal receiving assembly 40, and this alternation light is during transmission, it is possible to air pollution
Thing reacts and produces photoacoustic signal.Concrete, after alternation light is irradiated on the pollutant in air, dirty
After dye thing can absorb luminous energy, contaminant molecule transits to excitation state, at the beginning of the contaminant molecule after transition returns
The process of beginning state, can be by realizing with luminous radiation transistion process, it is also possible to jumped by radiationless
Process of moving realizes, wherein vibration during radiationless transition and rotational energy be by with other molecular collisions
And dissipate in the form of heat.Owing to this alternation light has certain frequency, at the absorption point of contaminant molecule
Above just can produce a periodic heat distribution, the heat of contaminant molecule diffuses to the table of contaminant molecule
Face, is conducted to the coupled gas of surrounding, and the gas in interlayer face produces pressure oscillation at housing, thus forms light
Acoustical signal.
It should be noted that in embodiments of the present invention, the transmitting direction of this detection signal and this signal reflex
The angle of the reflecting surface of assembly 30 can be 45 degree, the receiving side signal of this detection signal receiving assembly 40 to
Also it is 45 degree with the angle of the reflecting surface of this signal reflex assembly 30.When detection signal transmission component 20 and letter
Vertical range one timing between number reflection subassembly, the angle launching direction and this reflecting surface of detection signal is more
Greatly, then the transmission path detecting signal is the longest, and contacting with air pollutants can be more abundant, but this detection letter
Space number shared by emitting module also can increase, and therefore considers transmission path and the inspection of this detection signal
Survey taking up room of signal transmission component, can be by the transmitting direction of this detection signal and this signal reflex assembly
The angle of the reflecting surface of 30 is set to 45 degree.
Optionally, with reference to Fig. 2, this detection signal receiving assembly 40 may include that photoacoustic signal collector 401,
Amplifying circuit 402 and simulation numeral are (English: Analog-to-Digital；It is called for short: AD) change-over circuit 403.
This photoacoustic signal collector 401 is connected with this amplifying circuit 402, and this photoacoustic signal collector 401 is used
In gathering photoacoustic signal, and this photoacoustic signal collected is sent to this amplifying circuit 402.
In embodiments of the present invention, this photoacoustic signal collector 401 can be microphone, according to above-mentioned analysis
Understanding, after detection signal (i.e. alternation light) contacts with air pollutants, the gas in housing can produce pressure
Fluctuation, and form photoacoustic signal, this microphone can detect and gather this photoacoustic signal.Due to this optoacoustic
Signal is the faintest, and the photoacoustic signal collected can be sent to amplifying electricity by this photoacoustic signal collector 401
Road 402 is amplified.Wherein, the microphone that should be used as photoacoustic signal collector can be to collect light
The highly sensitive microphone of acoustical signal, to ensure effective collection of this photoacoustic signal, it is ensured that air pollutants
The accuracy of detection of concentration detection apparatus.
This amplifying circuit 402 is connected with this A/D convertor circuit 403, and this amplifying circuit 402 is used for amplifying this
Photoacoustic signal, and will amplify after this photoacoustic signal send to this A/D convertor circuit 403.This AD conversion electricity
Road 403 this photoacoustic signal after amplifying is converted to data signal, and detects the voltage of this data signal,
According to the corresponding relation of default voltage Yu pollutant levels, by the pollution corresponding to the voltage of this data signal
Substrate concentration is defined as the concentration of air pollutants.
In actual applications, this detection signal receiving assembly 40 can also include and this A/D convertor circuit 403
The sense voltage table connected, after photoacoustic signal is converted to the signal of telecommunication by A/D convertor circuit 403, can be by being somebody's turn to do
Sense voltage table detects the magnitude of voltage of this signal of telecommunication.
This detection signal receiving assembly can also store default voltage pass corresponding with pollutant levels
System, this voltage preset can be arranged based on experience value with the corresponding relation of pollutant levels.Such as,
This air pollutant concentration detection device can be used to examine respectively in the environment of different air pollutant concentrations
The magnitude of voltage of light-metering acoustical signal, then according to known air pollutant concentration and the actually detected magnitude of voltage arrived,
Simulate the relation between this air pollutant concentration and magnitude of voltage, and then may determine that corresponding to different magnitude of voltage
Air pollutant concentration.Example, in detection signal receiving assembly, the fractional voltage Of of storage is dirty with air
The corresponding relation of dye concentration can be as shown in table 1, and wherein, magnitude of voltage is the sky corresponding to 0.1 volt (V)
Gas pollutant levels can be 100 microgram every cubic metre, and magnitude of voltage is that the air pollutants corresponding to 0.2V are dense
Degree can be 1500 microgram every cubic metre.
Table 1
| Voltage (V) | Air pollutant concentration (microgram every cubic metre) |
| 0.1 | 100 |
| 0.2 | 150 |
| 0.3 | 200 |
Fig. 3 is the structural representation of another air pollutant concentration detection device that the embodiment of the present invention provides
Figure, as it is shown on figure 3, in the housing 10 of this air pollutant concentration detection device, this detection signal is sent out
Penetrate and be provided with air-containing chamber 103 between assembly 20 and this detection signal receiving assembly 40, this sky
Gas accommodating chamber 103 is in communication with the outside by least one through hole 101, and example, shown in Fig. 3
Device in, this housing 10 is provided with a through hole 101, outside air can be by this through hole 101
Enter in air-containing chamber 103.
The reflecting surface of this signal reflex assembly 30 is positioned at this air-containing chamber 103, and this air accommodates
Chamber 103 is provided with entrance aperture near the side of this detection signal transmission component 20, and this air accommodates chamber
Room 103 is provided with perforation hole near the side of this detection signal receiving assembly 40, and this detection signal is launched
This detection signal can be launched to this signal reflex assembly 30, this letter by assembly 20 by this entrance aperture
This detection signal reflex received can be believed to this detection by number reflection subassembly 30 by this perforation hole
Number receiving unit 40.By setting into perforation and perforation hole on this air-containing chamber, can avoid
The transmission of this detection signal is caused stop by the outer wall of air-containing chamber, reduces this detection signal and is subject to
Interference, it is ensured that detection signal can effectively be launched to signal reflex assembly, and ensures this detection signal
Receiving unit can effectively receive detection signal reacted with air pollutants, it is ensured that this air is dirty
The accuracy of detection of dye substrate concentration detection device.
During detection signal transmits in this air-containing chamber 103, can accommodate with this air
Air pollutants in chamber 103 react and generate photoacoustic signal, and this photoacoustic signal can pass through
This perforation hole transmits to detecting signal receiving assembly.Owing to this air-containing chamber 103 is by through hole 101
Being in communication with the outside, composition of air in this air-containing chamber 103 and air pollutant concentration are with extraneous
Air should be identical, and air pollutant concentration detection device the most as shown in Figure 3 can ensure that
Detection signal effectively contacts with outside air, thus ensure that the accuracy of detection of air pollution concentration,
And by being provided for accommodating the air-containing chamber of outside air in housing, it is possible to reduce detection
Contacting of signal transmission component and detection signal receiving assembly and outside air, it is to avoid the pollution in air
Detection signal transmission component and detection signal receiving assembly are caused damage by thing, extend this air pollution
The service life of substrate concentration detection device.
Further, with reference to Fig. 2, this device can also include: prompting assembly 50.
This prompting assembly 50 is connected with this detection signal receiving assembly 40, is used for prompting the user with this detection letter
The concentration of air pollutants determined by number receiving unit 40, such as, this prompting assembly 50 can be display
Screen, after detection signal receiving assembly 40 determines the concentration of air pollutants, can be shown by this display screen
The concentration of Current air pollution thing.Additionally, this prompting assembly 50 can also be speech play assembly, by this
Speech play assembly, it is possible to the air pollutant levels that real-time broadcasting detects.
It should be noted that this prompting assembly can also store air pollutant concentration and safeguard procedures
Corresponding relation, therefore gets current air pollutants when this prompting assembly from detection signal receiving assembly
After concentration, it is also possible to according to this corresponding relation, determine that, under the degree of Current air pollution, user can adopt
Safeguard procedures taken, and prompt the user with this safeguard procedures, such as, when air pollutant concentration is 200 micro-
When gram every cubic metre, this prompting assembly may remind the user that minimizing is gone out；When air pollutant concentration is 150
During microgram every cubic metre, this prompting assembly may remind the user that wears haze mouth mask.
Optionally, as in figure 2 it is shown, this device can also include: communications component 60.
This communications component 60 is connected with this detection signal receiving assembly 30, for by this detection signal reception group
The concentration of air pollutants determined by part sends in real time to terminal.This communications component 60 can be bluetooth module
Or Wireless Fidelity is (English: Wireless Fidelity；It is called for short: Wi-Fi) module etc., by this communications component
Air pollutant concentration is sent in real time to terminal, Current air pollution can be prompted the user with by this terminal
Degree and the safeguard procedures that can take of user.
Further, with reference to Fig. 2, this device can also include: switch module 70, this switch module 70 with
This detection signal transmission component 20 connects, and is used for controlling this detection signal transmission component 20 and sends detection signal.
User can control to detect the duty of signal transmission component 20 by this switch 70, when needs detection sky
During gas pollutant levels, then start this detection signal transmission component by switch module, improve this air dirty
The controllability of dye substrate concentration detection device and use flexibility.
Optionally, with reference to Fig. 2, this housing 10 is also provided with the via 102 for connecting lanyard,
So that user carries with this air pollutant concentration detection device, further increase these air pollutants dense
The portability of degree detection device.
It should be noted that in actual applications, the shape of the housing of this air pollutant concentration detection device
Shape can also be heart as shown in Figure 4, or can also be n shape etc., and the embodiment of the present invention is to this
Do not limit.
In sum, a kind of air pollutant concentration detection device, this device are embodiments provided
In except include detect signal transmission component and detection signal receiving assembly, also include signal reflex assembly, should
Signal reflex assembly by the detection signal reflex received to detecting signal receiving assembly, thus can extend
The transmission path of this detection signal, it is ensured that detection signal effectively contacts with air pollutants, it is achieved that
On the premise of ensureing the accuracy of detection of air pollutant concentration, reduce air pollutant concentration and detect device institute
The effect taken up space, improves the use flexibility of air pollutant concentration detection device.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all the present invention's
Within spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (12)
1. an air pollutant concentration detection device, it is characterised in that described device includes:
Housing and in described housing the most spaced detection signal transmission component, signal reflex assembly
With detection signal receiving assembly；
Described detection signal transmission component, for launching detection signal to described signal reflex assembly；
Described signal reflex assembly, for connecing the described detection signal reflex received to described detection signal
Receive assembly；
Described detection signal receiving assembly is for receiving the detection signal of described signal reflex assembly reflection, and root
Detection signal according to the described reflection received determines the concentration of air pollutants.
Device the most according to claim 1, it is characterised in that
The shape of described housing and the transmission route matching of described detection signal.
Device the most according to claim 1, it is characterised in that described detection signal transmission component includes:
Lasing light emitter and chopper；
Described lasing light emitter for launching the monochromatic light of predeterminated frequency to described chopper；
Described chopper for being modulated into alternation light by described monochromatic light, and launches to described signal reflex assembly
Described alternation light.
Device the most according to claim 3, it is characterised in that
Described signal reflex assembly is reflective mirror, and described reflective mirror is for reflexing to described inspection by described alternation light
Surveying signal receiving assembly, described alternation light is during transmission, it is possible to react also with air pollutants
Produce photoacoustic signal.
Device the most according to claim 4, it is characterised in that described detection signal receiving assembly includes:
Photoacoustic signal collector, amplifying circuit and analog digital A/D converting circuit；
Described photoacoustic signal collector is connected with described amplifying circuit, and described photoacoustic signal collector is used for gathering
Photoacoustic signal, and the described photoacoustic signal collected is sent to described amplifying circuit；
Described amplifying circuit is connected with described A/D convertor circuit, and described amplifying circuit is used for amplifying described optoacoustic
Signal, and the described photoacoustic signal after amplifying sends to described A/D convertor circuit；
The described A/D convertor circuit described photoacoustic signal after amplifying is converted to data signal, and detects
The voltage of described data signal, according to the corresponding relation of default voltage Yu pollutant levels, by described numeral
Pollutant levels corresponding to the voltage of signal are defined as the concentration of air pollutants.
Device the most according to claim 1, it is characterised in that
Being provided with at least one through hole on described housing, described housing is by least one through hole described and the external world
Connection.
Device the most according to claim 6, it is characterised in that
In described housing, it is provided with between described detection signal transmission component and described detection signal receiving assembly
Air-containing chamber, described air-containing chamber is in communication with the outside by least one through hole described；
The reflecting surface of described signal reflex assembly is positioned at described air-containing chamber, described air-containing chamber
The side of described detection signal transmission component is provided with entrance aperture, and described air-containing chamber is near described
The side of detection signal receiving assembly is provided with perforation hole, and described detection signal transmission component can be by described
Described detection signal is launched to described signal reflex assembly by entrance aperture, and described signal reflex assembly can pass through
The described detection signal reflex extremely described detection signal receiving assembly that described perforation hole will receive.
Device the most according to claim 1, it is characterised in that described device also includes:
Prompting assembly；
Described prompting assembly is connected with described detection signal receiving assembly, and described prompting assembly is for carrying to user
Show the concentration of air pollutants determined by described detection signal receiving assembly.
Device the most according to claim 1, it is characterised in that described device also includes:
Communications component；
Described communications component is connected with described detection signal receiving assembly, for by described detection signal reception group
The concentration of air pollutants determined by part sends to terminal.
Device the most according to claim 1, it is characterised in that described device also includes:
Switch module；
Described switch module is connected with described detection signal transmission component, is used for controlling described detection signal and launches
Assembly sends detection signal.
11. devices according to claim 1, it is characterised in that
The angle of the reflecting surface launching direction and described signal reflex assembly of described detection signal is 45 degree, institute
The receiving side signal stating detection signal receiving assembly is 45 to the angle with the reflecting surface of described signal reflex assembly
Degree.
12. according to the arbitrary described device of claim 1 to 11, it is characterised in that
Described housing be shaped as inverted V-shaped；
The via for connecting lanyard it is provided with on described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244684.9A CN105866036A (en) | 2016-04-18 | 2016-04-18 | Air pollutant concentration detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244684.9A CN105866036A (en) | 2016-04-18 | 2016-04-18 | Air pollutant concentration detection device |
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| Publication Number | Publication Date |
|---|---|
| CN105866036A true CN105866036A (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610244684.9A Pending CN105866036A (en) | 2016-04-18 | 2016-04-18 | Air pollutant concentration detection device |
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| CN (1) | CN105866036A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111359113A (en) * | 2018-12-26 | 2020-07-03 | Lg电子株式会社 | Mask storage device and control method thereof |
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