Particle detection device
阅读说明:本技术 微粒检测装置 (Particle detection device ) 是由 莫皓然 吴锦铨 陈智凯 林景松 黄启峰 韩永隆 陈宣恺 于 2019-03-15 设计创作,主要内容包括:一种微粒检测装置,包含:基座,包含检测部件承载区、微型泵承载区、检测通道、光束通道及光陷阱区,其中光陷阱区设有光陷阱结构,设置对应到光束通道;检测部件,包含微处理器、微粒传感器及激光器,激光器设置于基座的检测部件承载区,微粒传感器设置在检测通道与光束通道正交位置;当微粒传感器及激光器受微处理器控制而被驱动运作时,激光器发射投射光源在光束通道,微粒传感器检测检测通道内流通气体中所含悬浮微粒的大小及浓度,投射光源于通过检测通道后投射在光陷阱结构上,减少杂散光直接反射回光束通道中。(A particle detection device, comprising: the device comprises a base, a detection component, a micro pump, a detection channel, a light beam channel and a light trap region, wherein the light trap region is provided with a light trap structure and corresponds to the light beam channel; the detection part comprises a microprocessor, a particle sensor and a laser, the laser is arranged in a detection part bearing area of the base, and the particle sensor is arranged at the position, orthogonal to the light beam channel, of the detection channel; when the particle sensor and the laser are controlled by the microprocessor to be driven to operate, the laser emits a projection light source in the light beam channel, the particle sensor detects the size and the concentration of suspended particles contained in circulating gas in the detection channel, and the projection light source passes through the detection channel and then is projected on the light trap structure, so that stray light is reduced from being directly reflected back to the light beam channel.)
1. A particle detection device, comprising:
a base, the inner region is divided into a detection component bearing region, a micropump bearing region, a detection channel, a light beam channel and a light trap region, wherein the detection channel and the light beam channel are arranged at orthogonal positions, the light beam channel orthogonally penetrates through the detection channel and is communicated with the light trap region, the detection channel is a straight gas circulation path, the micropump bearing region is communicated with the detection channel, and the light trap region is provided with a light trap structure with a paraboloid structure and is arranged corresponding to the light beam channel;
a detection component, including a microprocessor, a particle sensor and a laser, the laser is positioned and arranged in the detection component bearing area of the base to emit a projection light from the light beam channel to the light trap area, and the particle sensor is arranged at the orthogonal position of the detection channel and the light beam channel to detect the size and concentration of suspended particles contained in the gas flowing in the detection channel;
when the particle sensor and the laser are controlled by the microprocessor to be driven to operate, the laser emits a projection light source in the light beam channel, the particle sensor detects the size and the concentration of suspended particles contained in gas flowing in the detection channel, and the projection light emitted by the laser is projected on the paraboloid structure of the light trap structure after passing through the detection channel, so that stray light is reduced from being directly reflected back to the light beam channel.
2. The particle detection apparatus of claim 1, wherein the location of the projected light source received by the optical trap structure is at an optical trap distance from the beam path.
3. The particle detection apparatus of claim 2, wherein the optical trap distance is greater than 3 mm.
4. The particulate detection apparatus according to claim 1, wherein the particulate sensor is a PM2.5 sensor.
5. The particle detecting device of claim 1, further comprising a protective film covering the external air inlet end of the detecting channel, wherein the protective film is a waterproof, dustproof and gas permeable film.
6. The particle detecting apparatus according to claim 1, wherein the particle sensor detects the size and concentration of the aerosol contained in the gas and outputs a detection signal, and the microprocessor receives the detection signal output from the particle sensor for analysis and outputs the detection data.
7. The particle detecting device as claimed in claim 1, further comprising a micro pump disposed in the micro pump receiving area for communicating and transmitting the gas in the detecting channel, wherein the micro pump receiving area of the base is provided at a bottom thereof with a receiving frame groove and an air inlet port, and provided at a top side thereof with an air outlet for communicating with the outside, the air inlet port is connected between the detecting channel and the receiving frame groove, the micro pump is disposed in the receiving frame groove and driven to operate, so as to generate a suction force in the detecting channel connected with the receiving frame groove, thereby guiding the gas outside the detecting channel into the detecting channel, and guiding the gas above the receiving frame groove through the transmission of the micro pump, and then exhausting the gas from the air outlet port to the outside, thereby completing the gas flow guiding for gas detection.
8. The particle detecting device of claim 7, further comprising a driving control board covering the bottom of the base, the driving control board is respectively packaged and positioned and electrically connected with the microprocessor, the particle sensor and the laser, and the particle sensor and the laser are controlled by the microprocessor to be driven to operate, and the micro pump is electrically connected with the driving control board to be controlled by the microprocessor to be driven to operate, wherein the micro pump, the particle sensor and the laser are controlled by the microprocessor to be driven to operate, so that the detection channel generates suction force to introduce external air into the detection channel, and the air passes through the detection channel and the orthogonal position of the light beam channel, and projected by the projection light source of the laser to generate a light spot on the particle sensor for detecting the size and concentration of the suspended particles.
9. The particle detecting device of claim 8, wherein the base has a first surface and a second surface, and the driving control board is covered on the second surface of the base.
10. The particle detecting device as claimed in claim 9, further comprising an outer cover member, the outer cover member comprising an upper cover member and a lower cover member, wherein the upper cover member covers the first surface of the base, and is provided with an air inlet at a position corresponding to the air inlet outside the detecting channel of the base, and is provided with an air outlet at a position corresponding to the air outlet of the micro-pump bearing region, and the lower cover member covers the second surface of the base and is engaged with the upper cover member to seal the base, and is provided with an air inlet opening at a region corresponding to the air inlet of the upper cover member, and is provided with an air outlet opening at a region corresponding to the air outlet of the upper cover member, and external air is introduced into the detecting channel of the base through the air inlet opening and the air inlet opening, and air in the detecting channel of the base is discharged from the air outlet of the micro-pump bearing region, then exhausted outside through the exhaust outlet and the exhaust opening.
11. The particle detection apparatus of claim 7, wherein the micropump comprises:
the air inlet plate is provided with at least one air inlet hole, at least one bus bar hole and a confluence chamber, wherein at least one air inlet hole is used for introducing air, at least one air inlet hole corresponds to at least one bus bar hole, at least one bus bar hole is correspondingly communicated with the confluence chamber, and the air introduced into at least one air inlet hole is guided to converge into the confluence chamber;
a resonance sheet, which is jointed with the air inlet plate and is provided with a hollow hole, a movable part and a fixed part, wherein the hollow hole is positioned at the center of the resonance sheet and corresponds to the confluence chamber of the air inlet plate;
a piezoelectric actuator assembled and combined on the resonator plate through a filler to form a chamber space between the piezoelectric actuator and the resonator plate, wherein the piezoelectric actuator comprises a suspension plate, an outer frame, at least one connecting part, a piezoelectric element and at least one gap, the at least one connecting part is connected between the suspension plate and the outer frame to provide elastic support, the at least one gap is arranged between the suspension plate and the outer frame and is used for gas circulation, and the piezoelectric element is attached to the suspension plate;
an insulating sheet coupled to one side of the piezoelectric actuator; and
a conducting plate, which is combined with the insulating plate and is provided with a conducting inner pin which is integrally punched, and a conducting position extends inwards from any edge of the conducting plate frame for contacting with the surface of the piezoelectric element and positioning connection;
when the piezoelectric actuator is driven, gas is introduced from at least one air inlet hole of the air inlet plate, is collected to the collecting cavity through at least one collecting bar hole, flows through the hollow hole of the resonance sheet, is introduced into the cavity space, and is transmitted through the resonance action of the piezoelectric actuator.
12. The particle detecting device as claimed in claim 11, wherein the conductive inner lead inwardly forms an extension portion having a bending angle and a bending height on any side of the conductive sheet frame, the extension portion has a bifurcation portion, the bifurcation portion and the conductive sheet outer frame maintain the bending height, and the bending height is equal to a height that is in contact with the thickness of the piezoelectric element, so that the bifurcation portion is attached to the surface of the piezoelectric element, and the bifurcation portion is combined and fixed with the piezoelectric element through a medium.
13. The particle detecting device of claim 11, wherein the suspension plate of the piezoelectric actuator includes a first surface and a second surface opposite to the first surface, the piezoelectric element is attached to the second surface of the suspension plate, and the outer frame of the piezoelectric actuator has a mating surface and a lower surface.
14. The particle detecting device of claim 13, wherein the first surface of the suspension plate and the mating surface of the housing form a common plane.
15. The particle detecting device of claim 13, wherein at least one connecting portion is formed by stamping between the suspension plate and the outer frame, the first surface of the suspension plate and the mating surface of the outer frame are formed to be non-coplanar, and a distance between the first surface of the suspension plate and the resonator plate is adjusted by stamping at least one connecting portion.
16. The particle detecting device of claim 11, wherein the movable portion of the resonator plate is disposed around the hollow hole in a region opposite to the confluence chamber.
17. The apparatus according to claim 11, wherein the fixing portion of the resonator plate is disposed at an outer peripheral portion of the resonator plate and is attached to the inlet plate.
18. The particle detecting device of claim 11, wherein the filler material is a conductive adhesive.
19. The particle detecting device as claimed in claim 11, wherein the outer frame has a conductive pin, and the conductive plate has a conductive pin for electrical connection.
Technical Field
The present invention relates to a particle detection device, and more particularly, to a particle detection device that can be mounted on a thin portable device for gas monitoring.
Background
The aerosol refers to solid particles or liquid droplets contained in gas, and because the particles have very fine particle sizes, the particles easily enter the lungs of a human body through nose hairs in the nasal cavity, thereby causing inflammation, asthma or cardiovascular diseases of the lungs, and if other pollutants adhere to the aerosol, the harm to the respiratory system is further aggravated. In recent years, the problem of gas pollution is getting more serious, and especially the concentration data of fine suspended particles (such as PM2.5) is often too high, so that the monitoring of the concentration of the gas suspended particles is getting more and more important, but because the gas can flow with the wind direction and the air volume in an indefinite amount, and the gas quality monitoring station for detecting the suspended particles is mostly a fixed point at present, the concentration of the suspended particles in the current periphery cannot be confirmed at all, so that a miniature and portable gas detection device is needed for a user to detect the concentration of the suspended particles in the periphery anytime, anywhere and anytime.
In view of the above, how to monitor the concentration of suspended particles at any time and any place is a problem that needs to be solved at present.
Disclosure of Invention
The main objective of the present invention is to provide a particle detection device, which utilizes a middle region of a thin substrate to separate a detection channel and a light beam channel, and a laser, a particle sensor and a micro pump which are configured to position a detection component, to transmit gas in the detection channel of a linear gas flow path in cooperation with the micro pump, so that the introduced gas can smoothly and smoothly pass through the orthogonal position of the detection channel and the light beam channel, thereby detecting the size and the concentration of suspended particles contained in the gas. The parabolic structure of the optical trap region and the design that the position of the optical trap structure for receiving the projection light source of the laser and the light beam channel keep the optical trap distance more than 3mm are adopted, so that the projection light source of the laser forms a focusing point on the parabolic structure of the optical trap structure, the occurrence that stray light is directly reflected back to the light beam channel is reduced, and more accurate particle detection benefit is achieved. Furthermore, the air inlet end outside the detection channel is provided with a protective film sealing cover, so that the detection channel can guide air and has the waterproof and dustproof effects, and the detection accuracy and the service life of the detection channel are not influenced as much as possible. Therefore, the particle detection device is very suitable for being assembled on the portable electronic device and the wearing accessories to form a movable particle detection device, so that a user can monitor the concentration of the surrounding suspended particles anytime, anywhere and anytime.
One broad aspect of the present disclosure is a particle detection apparatus, comprising: a base, the inner region is divided into a detection component bearing region, a micropump bearing region, a detection channel, a light beam channel and a light trap region, wherein the detection channel and the light beam channel are arranged at orthogonal positions, the light beam channel orthogonally penetrates through the detection channel and is communicated with the light trap region, the detection channel is a straight gas circulation path, the micropump bearing region is communicated with the detection channel, and the light trap region is provided with a light trap structure with a paraboloid structure and is arranged corresponding to the light beam channel; a detection component, including a microprocessor, a particle sensor and a laser, the laser is positioned and arranged in the detection component bearing area of the base to emit a projection light from the light beam channel to the light trap area, and the particle sensor is arranged at the orthogonal position of the detection channel and the light beam channel to detect the size and concentration of suspended particles contained in the gas flowing in the detection channel; when the particle sensor and the laser are controlled by the microprocessor and driven to operate, the laser emits a projection light source in the light beam channel, the particle sensor detects the size and the concentration of suspended particles contained in gas flowing in the detection channel, and the projection light emitted by the laser is projected on the paraboloid structure of the light trap structure after passing through the detection channel, so that stray light is reduced from being directly reflected back to the light beam channel.
Drawings
FIG. 1 is a schematic view of the particle detecting apparatus.
Fig. 2 is an exploded view of the related components of the particle detecting device.
Fig. 3 is a schematic structural diagram of a base of the particle detecting device.
Fig. 4A is a schematic structural diagram of the micro-pump assembled with the base of the particle detecting device.
Fig. 4B is a schematic view illustrating the gas flow during the detection of the particle detecting apparatus according to the present invention.
Fig. 4C is a schematic view illustrating the gas flow and the light source projection during the detection of the particle detection device.
Fig. 5 is a schematic perspective view of a micro pump of the particle detecting device.
FIG. 6A is a schematic view of the miniature pump according to the present invention viewed from the front.
FIG. 6B is a schematic view of a rear side view of the micro-pump of the present invention.
FIG. 7A is a schematic cross-sectional view of a micro-pump according to the present invention.
FIG. 7B is a schematic cross-sectional view of a micro pump according to another preferred embodiment of the present invention.
Fig. 8 is a partially enlarged view of the conductive inner lead of the micro-pump of the present invention.
Fig. 9A to 9C are schematic views illustrating operation of the micro pump in fig. 7A.
Description of the reference numerals
1: base seat
1 a: first surface
1 b: second surface
11: detecting component bearing area
12: micropump carrier region
121: bearing frame groove
122: air inlet port
123: exhaust port
13: detection channel
14: light beam channel
15: light trapping region
151: optical trap structure
2: detection component
21: microprocessor
22: particle sensor
23: laser device
3: micro pump
31: air inlet plate
31 a: air intake
31 b: bus bar hole
31 c: confluence chamber
32: resonance sheet
32 a: hollow hole
32 b: movable part
32c, the ratio of: fixing part
33: piezoelectric actuator
33 a: suspension plate
331 a: first surface
332 a: second surface
33 b: outer frame
331 b: matched surface
332 b: lower surface
333 b: conductive pin
33 c: connecting part
33 d: piezoelectric element
33 e: gap
33 f: convex part
331 f: surface of the convex part
34: insulating sheet
35: conductive sheet
351 a: conductive pin
351 b: conductive inner pin
3511 b: extension part
3512 b: branching part
36: chamber space
4: drive control panel
5: outer cover plate
5 a: upper cover plate
51 a: inlet inlet
52 a: exhaust outlet
5 b: lower cover plate
51 b: air inlet opening
52 b: exhaust opening
6: protective film
g: filling material
h: distance between each other
θ: bending angle
H: height of bending
P: intermediate separation distance
L: projection light source
W: distance of light trap
Detailed Description
Exemplary embodiments that embody features and advantages of this disclosure are described in detail below in the detailed description. It will be understood that the present disclosure is capable of various modifications without departing from the scope of the disclosure, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.
Referring to fig. 1 to 4C, a particle detecting apparatus is provided, which includes a base 1, a detecting
Referring to fig. 4A, 4B and 4C, the detecting
Referring to fig. 1 and 2, the
Referring to fig. 2, 4A, 4B, 4C, 5, 6A, 6B and 7A, the
The
In other embodiments, as shown in fig. 7B, the
Referring to fig. 6A and 8, the insulating
Please refer to fig. 9A to 9C, which are schematic operation diagrams of the
As can be seen from the above description, in the implementation of the particle detecting apparatus provided in the present invention, the
In summary, the particle detecting apparatus provided by the present disclosure utilizes the middle region of the thin-type substrate to separate the detecting channel and the light beam channel, and the laser, the particle sensor and the micro-pump, which are configured to position the detecting component, in the substrate, and the micro-pump is matched to transmit gas in the detecting channel of a linear gas flow path, so that the introduced gas can smoothly and smoothly pass through the orthogonal position of the detecting channel and the light beam channel, thereby detecting the size and the concentration of the suspended particles contained in the gas. The parabolic structure of the optical trap region and the design that the position of the optical trap structure for receiving the projection light source of the laser and the light beam channel keep the optical trap distance more than 3mm are adopted, so that the laser projection light source is enabled to form a focusing point on the parabolic structure of the optical trap structure, the occurrence that stray light is directly reflected back to the light beam channel is reduced, and more accurate particle detection benefit is achieved. Furthermore, the air inlet end outside the detection channel is provided with a protective film sealing cover, so that the detection channel can guide air and has the waterproof and dustproof effects, and the detection accuracy and the service life of the detection channel are not influenced as much as possible. Therefore, the particle detection device is very suitable for being assembled on the portable electronic device and wearing accessories to form a movable particle detection device, so that a user can monitor the concentration of the surrounding suspended particles anytime and anywhere, and the particle detection device has industrial applicability and advancement.
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