CN206470156U - Particulate matter sensors - Google Patents
Particulate matter sensors Download PDFInfo
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- CN206470156U CN206470156U CN201621469912.4U CN201621469912U CN206470156U CN 206470156 U CN206470156 U CN 206470156U CN 201621469912 U CN201621469912 U CN 201621469912U CN 206470156 U CN206470156 U CN 206470156U
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- particulate matter
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Abstract
The utility model is related to a kind of particulate matter sensors, and it includes：Circuit to be shielded is provided with circuit board, circuit board；Conductive shield member, conductive shield member is arranged at circuit to be shielded, conductive shield member is connected with circuit board and accommodates circuit to be shielded, and conductive shield member is located at the same side of circuit board with circuit to be shielded, and conductive shield member can treat screened circuit and is electromagnetically shielded.The particulate matter sensors that the utility model embodiment is provided, can be electromagnetically shielded, it is to avoid circuit is directly exposed in external environment condition to circuit, reduce the hi-fi and the stability of the course of work of signal in electromagnetic interference, lifting circuit.
Description
Technical field
The utility model is related to detection device technical field, and in particular to a kind of particulate matter sensors.
Background technology
In the last few years, as air pollution situation is increasingly serious, the common people increasingly pay close attention to air quality situation at one's side, wish
Prestige, which oneself can monitor the vocabulary such as the air quality around oneself, therefore PM10, PM2.5 in real time and frequently appear in people, lives it
In.PM2.5 refers to that aerodynamic size is less than 2.5 microns of particulates in air, is the pass for evaluating atmospheric pollution level
One of key index.It can long period be suspended in air, its in atmosphere content (concentration) it is higher, just represent air pollution and get over
Seriously, the influence to health and atmosphere quality is also bigger, is generally enriched with As, Se, Pb, Cr etc. heavy metal element
With the organic pollution such as PAHs, PCDD/Fs, VOCs, these are generally carcinogen and genotoxicity mutagen matter, are had to human body
Larger harm.What United Nations Environment Programme in 2012 announced《Global environment is looked forward to》Point out, have every year nearly 2,000,000 it is too early
Death is relevant with Particulate Pollution.The instant detection of PM2.5 dust granules, be effective preventing and treating PM2.5 pollutions premise and
Important leverage.PM2.5 detection devices include PM2.5 sensors.In order to ensure the normal operation of PM2.5 detection devices, PM2.5 is passed
The circuit board of sensor has been generally integrated many circuits worked independently.In these circuits, it is sometimes desirable to which signal type is entered
Signal strength is adjusted for row conversion.But because circuit is directly exposed in external environment condition, thus circuit easily by
The interference of electromagnetic signal and reduce hi-fi, there is wild effect in the circuit course of work.
Utility model content
The utility model embodiment provides a kind of particulate matter sensors, circuit can be electromagnetically shielded, it is to avoid circuit
It is directly exposed in external environment condition, reduces the hi-fi and the stability of the course of work of signal in electromagnetic interference, lifting circuit.
On the one hand, a kind of particulate matter sensors are proposed according to the utility model embodiment, it includes：Circuit board, circuit
Circuit to be shielded is provided with plate；Conductive shield member, conductive shield member are provided with conductive shield member, circuit to be shielded
It is connected with circuit board and accommodates circuit to be shielded, conductive shield member is located at the same side of circuit board with circuit to be shielded, led
Electrical shielding part can treat screened circuit and is electromagnetically shielded.
According to the one side of the utility model embodiment, circuit to be shielded includes photodiode Acquisition Circuit, photoelectricity
Diode Acquisition Circuit includes photodiode, and particulate matter sensors also include cover body, and cover body is used to cover photodiode, led
Electrical shielding part includes the first electric conductor and the second electric conductor of electrical connection, and circuit board is electric towards the surface of cover body and cover body direction
Upper set in one of surface of road plate sets the second electric conductor in the first electric conductor, another one.
According to the one side of the utility model embodiment, the first electric conductor and the second electric conductor are cyclic structure, the
One electric conductor and the second electric conductor are around light emitting diode.
According to the one side of the utility model embodiment, the first electric conductor is conducting foam, and the second electric conductor is conduction
Enamelled coating and/or conductive aluminum foil.
According to the one side of the utility model embodiment, circuit to be shielded includes signal processing circuit, conductive shield portion
Part is electrically conductive shield, and electrically conductive shield covers signal processing circuit, and the openend of electrically conductive shield is connected with circuit board.
According to the one side of the utility model embodiment, electrically conductive shield is tubular structure.
According to the one side of the utility model embodiment, heat emission hole is provided with electrically conductive shield.
According to the one side of the utility model embodiment, electrically conductive shield is network structure.
According to the one side of the utility model embodiment, the material of electrically conductive shield is metal material.
According to the one side of the utility model embodiment, metal material includes copper, aluminium alloy or nickel-plated aluminium alloy.
The particulate matter sensors provided according to the utility model embodiment, due to the circuit to be shielded set on circuit boards
Periphery is provided with the conductive shield member with electromagnetic shielding action, therefore circuit to be shielded is protected by conductive shield member
Shield, it is to avoid by the electromagnetic interference in external environment condition, lift stability and input or the output of the circuit course of work to be shielded
Signal hi-fi.
Brief description of the drawings
The feature, advantage and technique effect of the utility model exemplary embodiment described below with reference to the accompanying drawings.
Fig. 1 is the structural representation of the particulate matter sensors of the utility model embodiment.
Fig. 2 is the circuit board of the embodiment of the utility model one and the decomposition texture schematic diagram of conductive shield member.
Fig. 3 is the circuit board of another embodiment of the utility model and the decomposition texture schematic diagram of conductive shield member.
Fig. 4 is the circuit board of the another embodiment of the utility model and the decomposition texture schematic diagram of conductive shield member.
In the accompanying drawings, identical part uses identical reference.Accompanying drawing is not drawn according to actual ratio.
Embodiment
Embodiment of the present utility model is described in further detail with reference to the accompanying drawings and examples.Following examples
The detailed description and the accompanying drawings be used to exemplarily illustrate principle of the present utility model, but can not be used for limiting model of the present utility model
Enclose, i.e., the utility model is not limited to described preferred embodiment, scope of the present utility model is defined by the claims.
, it is necessary to which explanation, unless otherwise indicated, " multiple " are meant that two or two in description of the present utility model
More than individual；In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating or implying relatively important
Property.Term " installation ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one
Connect body；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirect by intermediary
It is connected.For the ordinary skill in the art, visual concrete condition understands tool of the above-mentioned term in the utility model
Body implication.
Particle concentration or particulate matter that the particulate matter sensors 1 of the utility model embodiment are used in environment to external world
The size of itself particle diameter is detected.The particulate matter sensors 1 that the present embodiment is provided can monitor PM0.3, PM0.5, PM1,
The particulate matter of the multiple diameters such as PM2.5, PM5 and PM10.
Fig. 1 schematically shows the structure of the particulate matter sensors 1 of the utility model embodiment.Fig. 2 schematically shows
The circuit board 3 of the embodiment of the utility model one and the decomposition texture of conductive shield member are shown.As shown in figure 1, the present embodiment
Particulate matter sensors 1 include housing 2 and the circuit board 3 being arranged in housing 2.It is provided with the circuit board 3 of the present embodiment many
Individual circuit.As shown in Fig. 2 the circuit of the present embodiment includes photodiode Acquisition Circuit and signal processing circuit 31.Photoelectricity two
Pole pipe Acquisition Circuit includes photodiode 32.The operation principle of particulate matter sensors 1 of the present embodiment is as follows：Particle is carried first
The gas of thing enters in the presence of electric motor fan on the air channel of particulate matter sensors 1 in the air channel of lid and air channel lower cover composition,
The laser level of laser transmitting is radiated on the gas with particulate matter, is both horizontally and vertically generated respectively
Penetrate and scatter, the laser of the horizontal direction after transmission passes through the refraction and extinction processing of minitype channel and is eliminated, and after scattering
The laser of vertical direction received by the photodiode 32 in photodiode Acquisition Circuit.Photodiode 32 receives sharp
After light, generation ultra-weak electronic signal can be sensed, then by signal processing circuit 31 on circuit board 3 by signal filtering enhanced processing,
Analog signal is converted into by single-chip microcomputer by data signal again, particulate matter sensors 1 carry out Algorithm Analysis to data signal, calculate
Go out corresponding particle concentration.The particulate matter sensors 1 of the present embodiment include conductive shield member.In circuit on circuit board 3
Including circuit to be shielded.Conductive shield member is connected with circuit board 3 and accommodates circuit to be shielded, can treat screened circuit and enter
Row electromagnetic shielding.Due to shielding protection of the circuit to be shielded by conductive shield member, thus circuit to be shielded can avoid by
Electromagnetic interference into external environment condition, improves course of work stability, also improves input or exports the letter of circuit to be shielded
Number hi-fi.
The photodiode Acquisition Circuit and/or signal processing circuit 31 of the present embodiment are circuit to be shielded.The pole of photoelectricity two
Conductive shield member is provided with pipe Acquisition Circuit and/or signal processing circuit 31, conductive shield member is connected with circuit board 3
And accommodate photodiode Acquisition Circuit or signal processing circuit 31.Conductive shield member and photodiode Acquisition Circuit or letter
Number process circuit 31 is located at the same side of circuit board 3, conductive shield member can be to photodiode Acquisition Circuit or signal at
Reason circuit 31 is electromagnetically shielded.
As shown in Fig. 2 when photodiode Acquisition Circuit is circuit to be shielded, the particulate matter sensors 1 of the present embodiment
Also include the cover body 4 for being used to cover the photodiode 32 in photodiode Acquisition Circuit.The center of the cover body 4 of the present embodiment
Region is provided with through hole 41, and photodiode 32 can receive the laser passed through from through hole 41.Cover body 4 and lid phase on air channel
Connection is integral type structure with lid on air channel, in the present embodiment, cover body 4 and lid integral structure on air channel.Conductive shield portion
Part includes the first electric conductor 5 and the second electric conductor 6.Circuit board 3 is towards the surface of cover body 4 and cover body 4 towards the surface of circuit board 3
One of upper set the second electric conductor 6 is set in the first electric conductor 5, another one.First electric conductor 5 and the second electric conductor 6 are matched somebody with somebody
When being combined together, the first electric conductor 5 is electrically connected with the second electric conductor 6, to be shielded to the formation of photodiode Acquisition Circuit.This reality
Apply the protrusion circuit board 3 of photodiode 32 surface of example.Following examples are with circuit board 3 towards setting on the surface of cover body 4
One electric conductor 5, cover body 4 is described towards setting on the surface of circuit board 3 exemplified by second electric conductor 6.
Fig. 3 schematically shows the circuit board 3 of another embodiment of the utility model and the decomposition knot of conductive shield member
Structure.
First electric conductor 5 of the present embodiment is cyclic structure.First electric conductor 5 of cyclic structure is circumferentially around the pole of photoelectricity two
Pipe 32.First electric conductor 5 of the present embodiment can be closed loop configuration (as shown in Figure 3) or open loop structure (such as Fig. 2 institutes
Show).Second electric conductor 6 is cyclic structure, is provided centrally with the centre bore corresponding with the through hole 41 of cover body 4.Second electric conductor 6
The through hole 41 set on cover body 4., can be to photoelectricity when first electric conductor 5 and the second electric conductor 6 are disposed as cyclic structure
The formation of through hole 41 of diode 32 or cover body 4 is stepped down, it is to avoid when cover body 4 and photodiode 32 are assembled, first is conductive
With photodiode 32 location conflicts occur for the electric conductor 6 of body 5 or second.
First electric conductor 5 of the present embodiment is conducting foam.Conducting foam is bonded in the way of being bonded around photoelectricity two
On the circuit board 3 of pole pipe 32.The capability of electromagnetic shielding of conducting foam is good, is easily fixedly mounted on circuit board 3, and will not be to electricity
Road plate 3 causes the destruction in structure.When the first electric conductor 5 is open loop structure, it can be bonded in the circumference of photodiode 32
It is not attached between four sections of conducting foams, each section of conducting foam, saves the usage amount of conducting foam.Four segmentations of the present embodiment are led
Electric foam is vertical two-by-two.When the first electric conductor 5 is closed loop configuration, around the conducting foam formation rectangle knot of photodiode 32
Structure, is engaged with the profile with photodiode 32.
Second electric conductor 6 of the present embodiment is electro-conductive lacquer layer and/or conductive aluminum foil.When the second electric conductor 6 is electro-conductive lacquer layer
When, in cover body 4 towards spraying conductive paint on the surface of circuit board 3 to form the electro-conductive lacquer layer of predetermined thickness.When the second electric conductor 6
During for conductive aluminum foil, conductive aluminum foil is adhered to cover body 4 towards on the surface of circuit board 3.When the second electric conductor 6 be electro-conductive lacquer layer and
, can be in cover body 4 towards first spraying conductive paint on the surface of circuit board 3 during conductive aluminum foil, then be bonded on electro-conductive lacquer layer conductive
Aluminium foil, or first in cover body 4 towards being bonded with conductive aluminum foil on the surface of circuit board 3, then spray conductive paint.Due to the chi of cover body 4
It is very little smaller, and conductive paint and/or conductive aluminum foil are fixed on by way of bonding on circuit board 3, it is not necessary to processed on cover body 4
Go out installation portion and achieved a fixed connection using other assisted fasteners, therefore using conductive paint and/or conductive aluminum foil in cover body 4
The upper mode for forming the second electric conductor 6 is easier to operate to.
The conductive shield member that first electric conductor 5 and the second electric conductor 6 of the present embodiment are assembled into jointly can be to photoelectricity
Diode 32 is electromagnetically shielded, and interference of the electromagnetism to photodiode 32 in external environment is reduced or eliminate, so as to improve light
The antijamming capability of electric diode Acquisition Circuit, it is ensured that photodiode 32 carries out the stability of photoelectric signal transformation process, carries
The accuracy of detection of high particulate matter sensors 1.First electric conductor 5 and/or the second electric conductor 6 of the present embodiment are grounded, it is ensured that good
Shield effectiveness.Copper coin line, the first electric conductor 5 and/or the second electric conductor 6 and circuit are provided with the circuit board 3 of the present embodiment
The copper coin line of plate 3 electrically connects to realize that the first electric conductor 5 and/or the second electric conductor 6 are grounded.
As shown in Fig. 2 when signal processing circuit is circuit to be shielded, the conductive shield member of the present embodiment is conducting screen
Cover cover 7.Electrically conductive shield 7 is used to cover signal processing circuit 31, to be electromagnetically shielded to signal processing circuit 31, it is ensured that former
Beginning small-signal has hi-fi.Electrically conductive shield 7 is provided with opening.Electrically conductive shield 7 covers on signal transacting by opening
After on circuit 31, the openend that electrically conductive shield 7 is provided with opening is fixedly connected with circuit board 3.The openend of electrically conductive shield 7
It can be fixedly connected by bonding way, welding manner or fastener with circuit board 3.The electrically conductive shield 7 of the present embodiment can be with
For tubular structure, its cross section is rectangle or circle.The integral rigidity of electrically conductive shield 7 of tubular structure is larger, to signal
Reason circuit 31 also can be to the formation physical protection of signal processing circuit 31 while electromagnetic shielding.
As shown in figure 3, heat emission hole 71 is provided with the electrically conductive shield 7 of the tubular structure of the present embodiment, so that at signal
The heat that reason circuit 31 itself is produced can be lost in external environment condition by heat emission hole 71, it is to avoid covered by electrically conductive shield 7
Signal processing circuit 31 temperature it is too high and influence the normal work of signal processing circuit 31.The electrically conductive shield of the present embodiment
Multiple heat emission holes 71 are provided with 7 top, air can enter in electrically conductive shield 7 from the opening of electrically conductive shield 7, then
The heat of signal processing circuit 31 is taken away and electrically conductive shield 7, improving radiating effect and efficiency is discharged from the heat emission hole at top.
The heat emission hole 71 of the present embodiment is circular port.Fig. 4 schematically shows the circuit board 3 of the another embodiment of the utility model with leading
The decomposition texture of electrical shielding part.As shown in figure 4, the electrically conductive shield 7 of the present embodiment can also be network structure, be conducive to letter
Number process circuit 31 radiates.The periphery of the signal processing circuit 31 of the present embodiment can be arranged multiple electrically conductive shields 7, so as to enter
One step lifts electromagnetic shielding capability, is effectively electromagnetically shielded.The material of the electrically conductive shield 7 of the present embodiment is metal material
Material, it is preferable that the material of electrically conductive shield 7 is copper, aluminium alloy or nickel-plated aluminium alloy.The electrically conductive shield 7 of the present embodiment is grounded,
Ensure good shield effectiveness.
The particulate matter sensors 1 of the utility model embodiment, because the circuit peripheral to be shielded set on circuit board 3 is set
The conductive shield member with electromagnetic shielding action has been put, therefore circuit to be shielded is protected by conductive shield member, it is to avoid
By the electromagnetic interference in external environment condition, the stability of the circuit course of work to be shielded and the signal of input or output are lifted
Hi-fi.
Although the utility model is described by reference to preferred embodiment, model of the present utility model is not being departed from
In the case of enclosing, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, as long as not depositing
The every technical characteristic being previously mentioned in structural hazard, each embodiment can combine in any way.The utility model
It is not limited to specific embodiment disclosed herein, but all technical schemes including falling within the scope of the appended claims.
Claims (10)
1. a kind of particulate matter sensors, it is characterised in that including：
Circuit to be shielded is provided with circuit board, the circuit board；
Conductive shield member, the conductive shield member is arranged at the circuit to be shielded, the conductive shield member with it is described
Circuit board is connected and accommodates the circuit to be shielded, and the conductive shield member is located at the circuit with the circuit to be shielded
The same side of plate, the conductive shield member can be electromagnetically shielded to the circuit to be shielded.
2. particulate matter sensors according to claim 1, it is characterised in that the circuit to be shielded includes photodiode
Acquisition Circuit, the photodiode Acquisition Circuit includes photodiode, and the particulate matter sensors also include cover body, described
Cover body is used to cover the photodiode, and the conductive shield member includes the first electric conductor and the second conduction of electrical connection
Body, the circuit board sets institute towards the surface of the cover body and the cover body towards one of surface of the circuit board is upper
State and second electric conductor is set in the first electric conductor, another one.
3. particulate matter sensors according to claim 2, it is characterised in that first electric conductor and second conduction
Body is cyclic structure, and first electric conductor and second electric conductor are around the light emitting diode.
4. particulate matter sensors according to claim 3, it is characterised in that first electric conductor is conducting foam, institute
The second electric conductor is stated for electro-conductive lacquer layer and/or conductive aluminum foil.
5. particulate matter sensors according to claim 1, it is characterised in that the circuit to be shielded includes signal transacting electricity
Road, the conductive shield member is electrically conductive shield, and the electrically conductive shield covers the signal processing circuit, the conducting screen
The openend for covering cover is connected with the circuit board.
6. particulate matter sensors according to claim 5, it is characterised in that the electrically conductive shield is tubular structure.
7. particulate matter sensors according to claim 6, it is characterised in that radiating is provided with the electrically conductive shield
Hole.
8. particulate matter sensors according to claim 5, it is characterised in that the electrically conductive shield is network structure.
9. particulate matter sensors according to claim 5, it is characterised in that the material of the electrically conductive shield is metal material
Material.
10. particulate matter sensors according to claim 9, it is characterised in that the metal material include copper, aluminium alloy or
Nickel-plated aluminium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621469912.4U CN206470156U (en) | 2016-12-29 | 2016-12-29 | Particulate matter sensors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621469912.4U CN206470156U (en) | 2016-12-29 | 2016-12-29 | Particulate matter sensors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206470156U true CN206470156U (en) | 2017-09-05 |
Family
ID=59712576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621469912.4U Active CN206470156U (en) | 2016-12-29 | 2016-12-29 | Particulate matter sensors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206470156U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110310554A (en) * | 2019-08-07 | 2019-10-08 | 中电科仪器仪表有限公司 | A kind of device for realizing that teaching experiment module internal circuit is rapid visual |
-
2016
- 2016-12-29 CN CN201621469912.4U patent/CN206470156U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110310554A (en) * | 2019-08-07 | 2019-10-08 | 中电科仪器仪表有限公司 | A kind of device for realizing that teaching experiment module internal circuit is rapid visual |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201116 Address after: 36 2012 Xinnan Community of Shuangyang Street, Luojiang District, Quanzhou City, Fujian Province Patentee after: XIRENMA COMBINED MEASUREMENT AND CONTROL (QUANZHOU) TECHNOLOGY Co.,Ltd. Address before: 361008, No. 155, East Xiamen Road, Fujian, No. 3 east hill international business center, building No. 6, No. D Patentee before: FATRI (XIAMEN) TECHNOLOGIES Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210730 Address after: Room 103-2, building a, phase II, science and technology building, 1057 Nanhai Avenue, Yanshan community, zhaoshang street, Nanshan District, Shenzhen, Guangdong 518052 Patentee after: Xi Ren Ma Da Zhou (Shenzhen) Medical Technology Co.,Ltd. Address before: 362012 Xinnan community, Shuangyang street, Luojiang District, Quanzhou City, Fujian Province Patentee before: XIRENMA COMBINED MEASUREMENT AND CONTROL (QUANZHOU) TECHNOLOGY Co.,Ltd. |