CN208224032U - Gas-detecting device - Google Patents

Abstract

A kind of gas-detecting device contains aerosol concentration to detect in air, include gas transport actuator；Optical sensor is correspondingly arranged in gas transport actuator lower position；And laser module, it is set between gas transport actuator and optical sensor, laser module can emit light beam and be projected to above optical sensor；Whereby, gas can be irradiated by by light beam, and by suspended particulates size in optical sensor analysis gas, and calculate the concentration containing suspended particulates, make gas by gas transport actuator high speed ejection, ejection cleaning is carried out to attach suspended particulates to photosensor surface, with the precision for maintaining optical sensor to monitor every time.

Description

Gas-detecting device

[technical field]

This case is about a kind of gas-detecting device, and espespecially one kind can carry out automatically the clean gas of jet to its optical sensor Detection device.

[background technique]

In recent years, the air pollution problems inherent of China and adjacent domain is gradually serious, especially thin suspended particulates (PM 2.5) Concentration data it is usually excessively high, the monitoring of Airborne particulate concentration is gradually paid attention to, various detection devices also corresponding utility model See generation.Currently, on the market for detecting the gas-detecting device of aerosol concentration, its working principle is that using that can be infrared light Or the suspended particulates of gas scatter in the light beam irradiation air duct of laser light, it, can through detecting, collecting the scattering light The partial sizes of suspended particulates and grains different in unit space are calculated out according to rice formula scattering theory (Mie scattering theory) The suspended particulates quantity of diameter.

However, gas-detecting device is due to having the air duct of connection outside air, and the light biography of detection scattering light Sensor is also set in air duct, is easily attached on optical sensor from extraneous pollutant and is influenced it to scattering light Detection, causes the error to result in.In response to this problem, current settling mode is to calculate mode through software to compensate meter It calculates, but because of the suspended particulates in practical application in outside air often change at any time non-maintenance fixed value, therefore compensates meter Calculate revised detected value still often and actual result have certain deviation.Therefore, for the gas to detect aerosol concentration The problem of body detection device, optical sensor pollutes masking vulnerable to the suspended particulates that the external world enters, actually industrial circle compels the solution that is essential Certainly the problem of.

[utility model content]

This case is to provide a kind of gas-detecting device with automatic cleaning function, contains microactuator suspension in air to detect Grain concentration, and sensor can be focused automatically and carry out jet cleaning, it is passed with preventing the pollutant in outside air to be attached to light On sensor, testing result is avoided to generate deviation whereby.

In a broad sense state sample implementation of this case, a kind of gas-detecting device, to detect the microactuator suspension contained in air Grain concentration, include: a gas transport actuator；One optical sensor is correspondingly arranged in the gas transport actuator lower position；With And a laser module, it is set between the gas transport actuator and the optical sensor, which can emit light beam throwing It is incident upon above the optical sensor；Whereby, gas can be irradiated by by the light beam, and by suspended particulates in optical sensor analysis gas Size, and the concentration containing the suspended particulates is calculated, make gas by the gas transport actuator high speed ejection, to pass to the light Sensor surfaces attach suspended particulates and carry out ejection cleaning, with the precision for maintaining the optical sensor to monitor every time.

Air inlet position is corresponded in the preferred embodiment of this case, in gas flow equipped with an accommodation groove and multiple fixations Slot；Gas transport actuator by a fumarole piece, a chamber frame, an actuator, an Insulating frame and a conductive frame according to Sequence stacks setting and constitutes, and wherein fumarole piece includes multiple brackets, a suspension piece and a hollow bore, and bracket is fixed with one Portion is shaped to correspond to the shape of the fixing groove, makes multiple bracket that can be placed on multiple fixing groove of gas flow, with positioning The fumarole piece is located in accommodation groove.The interconnecting piece of bracket flexibly supports suspension piece, reciprocating for carry out the suspension piece can Bending vibration.

[Detailed description of the invention]

Fig. 1 is the structural schematic diagram of the gas-detecting device of a preferred embodiment of this case.

Fig. 2 is that the gas transport actuator of this case is fixedly arranged on the surface structure schematic diagram of accommodation groove.

Fig. 3 A is that the associated components of gas transport actuator shown in Fig. 2 decompose positive structure schematic.

Fig. 3 B is that the associated components of gas transport actuator shown in Fig. 2 decompose structure schematic diagram.

Fig. 4 is the surface structure schematic diagram of the accommodation groove of this case.

Fig. 5 is the overlooking structure diagram of fumarole piece shown in Fig. 3 A.

Fig. 6 A is the A-A the schematic diagram of the section structure of gas transport actuator shown in Fig. 2.

Fig. 6 B and Fig. 6 C are the illustrative view of gas transport actuator shown in Fig. 6 A.

[symbol description]

100: gas-detecting device

1: gas transport actuator

11: fumarole piece

110: suspension piece

111: hollow bore

112: bracket

1121: fixed part

1122: interconnecting piece

113: gap

12: chamber frame

13: actuator

131: piezoelectricity support plate

1311: the first conductive connecting pins

132: adjustment sounding board

133: piezoelectric patches

14: Insulating frame

15: conductive frame

151: the second conductive connecting pins

152: electrode

16: resonator chamber

17: air-flow chamber

2: laser module

3: optical sensor

4: ray machine structure

41: beam channel

42: gas flow

43: slot is arranged in light source

44: accommodation groove

441: fixing groove

442: the first grooves

443: the second grooves

5: drive circuit module

[specific embodiment]

The some exemplary embodiments for embodying this case features and advantages will describe in detail in the explanation of back segment.It should be understood that This case can have various variations in different aspects, all not depart from the range of this case, and explanation therein and diagram It is illustrated as being used in itself, rather than to limit this case.

This case provides a kind of gas-detecting device, to detect aerosol concentration contained in air, the microactuator suspension Grain can be PM2.5 suspended particulates or PM10 suspended particulates.Referring to Fig. 1, its gas detection for a preferred embodiment of this case The structural schematic diagram of device.In this present embodiment, gas-detecting device 100 includes gas transport actuator 1, laser module 2, light Sensor 3, ray machine structure 4 and drive circuit module 5.Ray machine structure 4 is set between gas transport actuator 1 and optical sensor 3, For an entity component, inside form a beam channel 41 and a gas flow 42.Wherein, 42 preferably of gas flow but not It is limited to the channel of linear structure.Beam channel 41 is beeline channel, and across being connected to gas flow 42.In this present embodiment, Gas flow 42 is arranged in a mutually vertical manner with beam channel 41.In this present embodiment, ray machine structure 4 further include a light source setting slot 43 with One accommodation groove 44, light source setting slot 43 are set to one end of beam channel 41；Accommodation groove 44 is set to one end of gas flow 42, Can for rectangular, round, oval, triangle and it is polygonal one of them.

Above-mentioned 1 framework of gas transport actuator is provided with actuating guiding gas gas above the gas flow 42 of ray machine structure 4 Conductance enters.In this present embodiment, gas transport actuator 1 is fixedly arranged in the accommodation groove 44 of ray machine structure 4, and but not limited to this.

Above-mentioned laser module 2 is that framework is arranged in slot 43 in the light source of ray machine structure 4, to emit a laser beam, with It is irradiated in beam channel 41, and can irradiate and pass through gas flow 42.Optical sensor 3 is set in gas flow 42, and is located at The lower position of beam channel 41.When the laser beam that laser module 2 is emitted passes through gas flow 42, it is able to be irradiated to gas The gas that gas flow 42 between transmission actuator 1 and optical sensor 3 is circulated.

Above-mentioned optical sensor 3 is is irradiated in gas flow 42 to detect the laser beam that laser module 2 is emitted The suspended particulates of gas project and the luminous point that reflects, monitor the size and calculating of suspended particulates contained in air whereby Aerosol concentration out.

Please continue to refer to Fig. 1, drive circuit module 5 includes a transmission module (not shown) and a processor (not shown), Processor is the starting for controlling gas transport actuator 1, laser module 2 and optical sensor 3, and monitors knot to optical sensor 3 Fruit performs an analysis operation and storage, when processor controls starting gas transport actuator 1, laser module 2 and optical sensor 3, gas Body transmits actuator 1 and guides gas flow importing, and to enter in gas flow 42, the gas in gas flow 42 can be excited optical mode The light beam of the be projected through beam channel 5 of block 2 irradiates, the suspended particulates of gas in such 3 detection gas runner 42 of optical sensor Illuminated and refraction luminous point, and will test monitoring result and be sent to processor, processor is according to the Analysis of test results gas Middle suspended particulates size, and the concentration of contained suspended particulates is calculated, analysis generates a monitoring numerical value and stores accordingly, handles Monitoring numerical value stored by device, which is obtained, is sent to outside connection device (not shown) by transmission module, and outside connection device can be cloud One of end system, portable apparatus, computer system, display device etc., to show monitoring numerical value and notification warning.

In the detection process of above-mentioned gas-detecting device or in a preset time point, processor control starting gas is passed Defeated actuator 1 drives, and extraneous gas imports gas transport actuator 1, and is able to high speed through gas transport actuator 1 and guides spray Gas flows in gas flow 42 out, and the suspended particulates attached whereby to 3 surface of optical sensor carry out ejection cleaning, is able to The precision of normality maintenance optical sensor 3.It before above-mentioned preset time point can be to carry out air detection operation every time, or is tool There are multiple preset time points (such as: once being cleaned automatically for every three minutes) of Fixed Time Interval, it also can be by user's hand Operation control is moved, or is dynamically determined to be calculated using software according to at-once monitor numerical value, is not limited with illustrating herein.

In addition, above-mentioned transmission module can pass through wire transmission or be wirelessly transmitted to external device (ED), wire transmission mode is such as Under, such as: the wire transmission module or wireless transmission method of one of USB, mini-USB, micro-USB etc. are as follows, Such as: the wireless transmission mould of one of Wi-Fi module, bluetooth module, radio frequency identification module, a near field communication module etc. Block.

It is that the gas transport actuator of this case is fixedly arranged on accommodation groove appearance knot please refer to Fig. 2, Fig. 3 A and Fig. 3 B, Fig. 2 Structure schematic diagram；Fig. 3 A and Fig. 3 B are respectively that the associated components of gas transport actuator shown in Fig. 2 decompose positive structure schematic With structure schematic diagram.The gas transport actuator 1 of the present embodiment is the gas transport structure of a micromation, can make gas height Speed and transmit in large quantities.The gas conveying actuator 1 of the present embodiment is by fumarole piece 11, chamber frame 12, actuator 13, insulation The elements such as frame 14 and conductive frame 15 are sequentially corresponding to stack setting.

Referring to Fig. 4, Fig. 4 is the surface structure schematic diagram of accommodation groove shown in Fig. 2.Accommodation groove 44 has more multiple fixations Slot 441, so that the buckle of fumarole piece 11 is fixed on.441 quantity of fixing groove of the present embodiment is four, respectively corresponds and is set to Four corners of accommodation groove 44, and be L connected in star, but not limited to this, and quantity, groove aspect can appoint according to actual demand to be applied Variation.The side of accommodation groove 44 more opens up one first groove 442 and one second groove 443.

Referring to Fig. 5, simultaneously simultaneously refering to Fig. 3 A and Fig. 3 B.Fig. 5 is the plan structure signal of fumarole piece shown in Fig. 3 A Figure.Fumarole piece 11 is to make with flexible material, includes suspension piece 110, hollow bore 111 and multiple brackets 112. Suspension piece 110 is the laminated structure of flexible vibration, and shape and size are generally corresponding to 44 inner edge of accommodation groove, but not as Limit, the shape of suspension piece 110 also can be one of rectangular, round, oval, triangle and polygonal.Hollow bore 111 is It is disposed through at the center of suspension piece 110, is circulated with supplied gas.The quantity of the bracket 112 of the present embodiment be four, but not As limit, quantity and kenel are mainly oppositely arranged with fixing groove 441, and each bracket 112 can shape with corresponding fixing groove 441 At a buckle structure to be mutually clamped fixation, only state sample implementation can appoint according to practical situation applies variation.

For example, as shown in figs. 4 and 5, each bracket 112 of the present embodiment includes fixed part 1121 and interconnecting piece 1122, fixed part 1121 is corresponding with the shape of fixing groove 441 (as shown in Figure 4), is all L shape to be mutually matched；Also that is, it is fixed Portion 1121 is L-shaped entity structure, and fixing groove 441 is L-shaped groove, when fixed part 1121 is placed in fixing groove 441, two Person can mutually buckle combination, and fumarole piece 11 is located in accommodation groove 44 whereby.The design of this buckle structure can be in level side To generation locating effect, and enhance the bonding strength of fumarole piece 11 Yu accommodation groove 44.What is more, in an assembling process, this blocks Buckle structure design can make fumarole piece 11 quickly and accurately be located in accommodation groove 44, have it is frivolous it is simple, convenient for assembling, with The advantages of being easy to precise positioning assembling.Meanwhile the interconnecting piece 1122 of bracket 112 be connected to suspension piece 110 and fixed part 1121 it Between, it is flexible strip structure, suspension piece 110 can be made to carry out reciprocally bending vibration.Multiple brackets 112 are in suspension piece Multiple gaps 113 (as shown in Figure 6A) are defined between 110 and 44 inner edge of accommodation groove, are circulated with supplied gas.

It is the A-A cross-section structure of gas transport actuator shown in Fig. 2 please refer to Fig. 3 A, Fig. 3 B and Fig. 6 A, Fig. 6 A Schematic diagram.Chamber frame 12 can be to be rectangular, and carrying is stacked and placed on the suspension piece 110 of fumarole piece 11.The carrying of actuator 13 is stacked In in chamber frame 12, its hollow structure is covered, and is collectively formed between fumarole piece 11, chamber frame 12 and actuator 13 One resonator chamber 16.Actuator 13 can adjust sounding board 132 by a piezoelectricity support plate 131, one and a piezoelectric patches 133 is constituted, Middle piezoelectricity support plate 131 can be metal plate, and periphery is extensible to form one first conductive connecting pin 1311 to receive electric current.Adjustment resonance Plate 132 equally for metal plate and can be attached at 131 top of piezoelectricity support plate.Piezoelectric patches 133 be with plate object made of piezoelectric material, Carrying is stacked and placed on adjustment sounding board 132.After piezoelectric patches 133 is powered, deformation can be generated because of piezoelectric effect, and specific one In the range of vibration frequency, piezoelectricity support plate 131 is driven to carry out reciprocating vibration.Adjustment sounding board 132 is located at piezoelectric patches 133 and pressure Between electric support plate 131, as cushion between the two, the vibration frequency of piezoelectricity support plate 131 can adjust.Substantially, adjustment is total The thickness of vibration plate 132 is greater than the thickness of piezoelectricity support plate 131, and the thickness for adjusting sounding board 132 can be subject to design alternative, adjust whereby The vibration frequency of whole actuator 13.

Please refer to Fig. 2, Fig. 3 A and Fig. 3 B, Insulating frame 14 and conductive frame 15 sequentially carry and are stacked and placed on actuator 13 On, the outer rim of conductive frame 15 protrudes out one second conductive connecting pin 151, and protrudes out a bending electrode 152, electrode from inner edge 152 are electrically connected the piezoelectric patches 133 of actuator 13.As shown in Fig. 2, the second conductive connecting pin 151 and piezoelectricity of conductive frame 15 First conductive connecting pin 1311 of support plate 131 is provided projectingly on the second groove 443 and the first groove 442 of accommodation groove 44 respectively, borrows This outside turn-on current, and it is common so that piezoelectricity support plate 131, adjustment sounding board 132, piezoelectric patches 133 and conductive frame 15 is formed one Circuit.In addition, can avoid conductive frame 15 through the Insulating frame 14 being set between conductive frame 15 and piezoelectricity support plate 131 It is directly electrically connected between piezoelectricity support plate 131, causes short circuit.

Fig. 6 A is please referred to, is the A-A the schematic diagram of the section structure of gas transport actuator shown in Fig. 2, is to indicate gas Transmission actuator 1 is assembled in the original state on accommodation groove 44 and corresponding to gas flow 42.Fumarole piece 11, chamber frame 12, sequentially corresponding stack is set on accommodation groove 44 for actuator 13, Insulating frame 14 and conductive frame 15, to constitute the present embodiment Gas transport actuator 1.In the preferred embodiment of this case, a gas is formed between fumarole piece 11 and the bottom surface of accommodation groove 44 Flow chamber 17.Hollow bore 111 of the air-flow chamber 17 through fumarole piece 11, connection actuator 13, chamber frame 12 and suspension Resonator chamber 16 between piece 12.Through the vibration frequency of gas in control resonator chamber 16, make the piezoelectricity of itself and suspension piece 110 Vibration frequency levels off to identical, and resonator chamber 16 and suspension piece 110 can be made to generate helmholtz resonance effect (Helmholtz Resonance), so that gas transport efficiency improves.

It is the actuation of gas transport actuator shown in Fig. 6 A please refer to Fig. 6 A, Fig. 6 B and Fig. 6 C, Fig. 6 B and Fig. 6 C Schematic diagram.As shown in Figure 6B, it when piezoelectric patches 133 vibrates upwards, drives the suspension piece 110 of fumarole piece 11 to vibrate upwards, makes The volume of air-flow chamber 17 is rapidly expanded, and pressure in air-flow chamber 17 is caused to decline.The vacuum suction of air-flow chamber 17 is extraneous big Gas gas is flowed by multiple gaps 113, and enters resonator chamber 16 via hollow bore 111, increases air pressure in resonator chamber 16 Add and generates a barometric gradient.Then, as shown in Figure 6 C, when piezoelectric patches 133 drives the suspension piece 110 of fumarole piece 11 to shake downwards When dynamic, the gas in resonator chamber 16 is quickly flowed out through hollow bore 111, squeezes the air in air-flow chamber 17, and make to converge Gas afterwards is quick with the ideal gas behavior for approaching Bernoulli law and sprays in large quantities, and after flowing through optical sensor 3 It is discharged (see Fig. 1).According to principle of inertia, 16 air pressure inside of resonator chamber after exhaust is lower than equilibrium air pressure, can guide gas again It is secondary to enter in resonator chamber 16.Therefore reciprocally being vibrated up and down through piezoelectric patches 133, and in control resonator chamber 16 The vibration frequency of gas and piezoelectric patches 133 level off to it is identical, to generate helmholtz resonance effect, in order to realizing gas high speed and big The transmission of amount.

In conclusion with the gas-detecting device of automatic cleaning function, gas transport actuator provided by this case The effect of being driven and vibrated up and down by piezoelectric patches, being driven resonator chamber to generate pressure change, reach gas transport, and by setting Ray machine structure provides a beam channel, light beam can be made more to concentrate.Furthermore this case more penetrates gas and piezoelectric patches in resonator chamber Resonant frequency level off to it is identical, to generate helmholtz resonance effect, in order to the transmission rate and transmission quantity of further lift gas, Make gas to approach the ideal gas behavior of Bernoulli law towards optical sensor and quickly spray, removes be attached to optical sensor whereby Suspended particulates on surface achieve the purpose that clean optical sensor.

This case appointed as person familiar with the technology apply craftsman think and be it is all as modify, it is so neither de- such as attached claim Be intended to Protector.

Claims (7)

1. a kind of gas-detecting device, detecting the aerosol concentration contained in air, characterized by comprising:

One gas transport actuator；

One optical sensor is correspondingly arranged in the gas transport actuator lower position；And

One laser module is set between the gas transport actuator and the optical sensor, which can emit a light beam It is projected to above the optical sensor；

Whereby, gas can be irradiated by by the light beam, and by suspended particulates size in optical sensor analysis gas, and calculate and contain There is the concentration of the suspended particulates, makes gas by the gas transport actuator high speed ejection, it is outstanding to be attached to the photosensor surface Floating particle carries out ejection cleaning, with the precision for maintaining the optical sensor to monitor every time.

2. gas-detecting device as described in claim 1, which is characterized in that include a ray machine structure, be set to the gas transport Between actuator and the optical sensor, which has a gas flow and a beam channel, which is connected to the gas Body runner makes laser module framework on the ray machine structure, can emit the beam channel light beam, and irradiate and pass through the gas stream Road, and the optical sensor is set in the gas flow, and is located at the beam channel lower position, is sent out with detecting the laser module Irradiating light beam, which irradiates, reflects luminous point caused by the suspended particulates of gas in the gas flow, wrapped in the monitoring calculation gas whereby The suspended particulates size and aerosol concentration contained.

3. gas-detecting device as claimed in claim 2, which is characterized in that the ray machine structure is provided with an accommodation groove, the accommodating Slot has multiple fixing grooves.

4. gas-detecting device as claimed in claim 3, which is characterized in that the gas transport actuator includes:

One fumarole piece, include multiple brackets, a suspension piece and a hollow bore, the flexible vibration of suspension piece, multiple Frame is placed in multiple fixing groove, is located in the accommodation groove with positioning the fumarole piece, and with the bottom surface of the accommodation groove it Between form an air-flow chamber, and an at least gap is formed between multiple bracket and the suspension piece and the accommodation groove；

One chamber frame, carrying are stacked and placed on the suspension on piece；

One actuator, carrying are stacked and placed in the chamber frame, are applied voltage and are generated reciprocally bending vibration；

One Insulating frame, carrying are stacked and placed on the actuator；And

One conductive frame, carrying is folded to be set on the Insulating frame；

Wherein, a resonator chamber is formed between the actuator, the chamber frame and the suspension piece, drives and drives through the actuator The fumarole piece generates resonance, and the suspension piece of the fumarole piece is made to generate reciprocally vibration displacement, to cause the gas logical An at least gap is crossed into the air-flow chamber, is then exhausted from into the gas flow.

5. gas-detecting device as claimed in claim 4, which is characterized in that multiple bracket includes a fixed part and a connection Portion, wherein the shape of the fixed part is corresponding with the shape of an at least fixing groove, which is connected to the suspension piece and should Between fixed part, which flexibly supports the suspension piece, carries out reciprocally bending vibration for the suspension piece.

6. gas-detecting device as claimed in claim 4, which is characterized in that the actuator includes:

One piezoelectricity support plate, carrying are stacked and placed in the chamber frame；

One adjustment sounding board, carrying are stacked and placed on the piezoelectricity support plate；And

One piezoelectric patches, carrying are stacked and placed on the adjustment sounding board, apply voltage and the piezoelectricity support plate and adjustment sounding board is driven to generate Reciprocally bending vibration.

7. gas-detecting device as claimed in claim 6, which is characterized in that the thickness of the adjustment sounding board is carried greater than the piezoelectricity The thickness of plate.