CN102338737A - Photoelectric gas sensing device and its manufacturing method - Google Patents
Photoelectric gas sensing device and its manufacturing method Download PDFInfo
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- CN102338737A CN102338737A CN2010102354430A CN201010235443A CN102338737A CN 102338737 A CN102338737 A CN 102338737A CN 2010102354430 A CN2010102354430 A CN 2010102354430A CN 201010235443 A CN201010235443 A CN 201010235443A CN 102338737 A CN102338737 A CN 102338737A
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Abstract
A manufacturing method of a photoelectric gas sensing device comprises the following steps of: providing a half-cavity die; forming two half-cavity bodies by the use of the half-cavity die to endow each of the two half-cavity bodies with two semi-convection apertures and a semielliptical internal surface; forming a reflecting layer on the internal surface of the two half-cavity bodies; combining the two half-cavity bodies into one cavity so as to make the internal surfaces and reflecting layers of the cavity to form an elliptical shape and joint the semi-convection apertures of the two half-cavity bodies to form two convection apertures; providing an emission source module and a receiving end module, and respectively disposing the emission source module and the receiving end module at two focuses on the internal surface of the cavity. Therefore, it is much easier to produce and manufacture the photoelectric gas sensing device. In addition, the invention also provides the photoelectric gas sensing device.
Description
Technical field
Relevant a kind of photo-electric gas measuring device of the present invention and manufacturing approach thereof refer to a kind of sensing apparatus and manufacturing approach thereof that is applied to sense gasses especially.
Background technology
For various poisonous, flammable, the explosive or asphyxiant gas in preventing to live leaks; And harmful to human even cause the injury on the environment; All circles are for the sensing apparatus input research that can detect various gas with various molecules, and focus on high sensitivity, low cost, usefulness such as selectivity is good, reaction is quick, high stability and repeatability.And the type of at present common gas measuring device mainly contains electric chemical formula, solid state electrolysis formula, semiconductor-type and optical profile type etc.
Wherein, the electrochemical gas sensing apparatus be with gas dissolving to be measured in the liquid electrolyte of electrochemical cell, and gas is detected in the variation that redox reaction takes place and produce curtage by this.Solid state electrolysis formula gas measuring device is as electrolyte with the solid ion conductor; Adding the cathode and anode material forms; Mainly utilize deep or light battery principle; That is the gas concentration of two electrodes is different and produce potential difference (PD), if the gas concentration of one of them electrode is known, then can use this special formula formula of alunite to try to achieve the gas concentration of another electrode.The semiconductor-type gas sensing apparatus mainly is to utilize metal oxide as sensing material, the resistance variations that the content number through metal oxide surface adsorbed gas is produced, and the gas concentration around monitoring changes.
And optical type gas sensing apparatus major part is to adopt the infrared Absorption method to come sensing.See also shown in Figure 1; It is a known optical formula gas measuring device; This optical type gas sensing apparatus comprises a cavity 1a, an infrared light supply 2a, a spectral filtering sheet 3a and an optical sensor 4a; This cavity 1a has two couples of discharge orifice 11a, and gas to be measured is by getting into discharge orifice 11a and discharge, and sends the infrared light with particular range of wavelengths by infrared light supply 2a; Infrared light can reflect in cavity 1a and transmit, and the infrared light of a certain specific wavelength can penetrate spectral filtering sheet 3a and received by optical sensor 4a.The principle of optical type gas sensing apparatus is to utilize the infrared light of particular range of wavelengths by the variation of light intensity that is produced before and after the gas absorption to be measured, the kind and the concentration of coming sensing gas to be measured.Yet the average incident angle that the infrared light of known optical formula gas measuring device gets into optical sensor is bigger, received signal a little less than, and the manufacturing of known optical formula gas measuring device is comparatively complicated.
Improving of the above-mentioned disappearance of inventor's thoughts is that the spy concentrates on studies and cooperates the utilization of scientific principle, proposes a kind of reasonable in design and effectively improve the present invention of above-mentioned disappearance finally.
Summary of the invention
Fundamental purpose of the present invention; Be to provide a kind of photo-electric gas measuring device and manufacturing approach thereof, the present invention can make gas measuring device manufacture more easy, select than improve, signal strengthens, reduction noise and receiving end assembly receive the energy that the emissive source assembly is sent equably.
For reaching above-mentioned purpose, the present invention provides a kind of photo-electric gas measuring device manufacturing approach, it is characterized in that step comprises: half cavity mold is provided; With this half cavity mold shaping two halves cavity, and this two halves cavity respectively has two semi-convection holes and half the axiolitic inside surface; In the inside surface of this two halves cavity reflection horizon that respectively is shaped; This two halves cavity is bonded into a cavity, and this cavity inner surface forms the ellipsoid shape, and the semi-convection hole of this two halves cavity is bonded with each other and forms two pairs of discharge orifices; One emissive source assembly is provided, this emissive source assembly is arranged at the along of this cavity inner surface; And a receiving end assembly is provided, this receiving end assembly is arranged at another along of this cavity inner surface.
The present invention provides a kind of photo-electric gas measuring device in addition; It is characterized in that, comprising: a cavity, its half cavity by two same structures engages and forms; This cavity has two pairs of discharge orifices; This inside cavity forms an accommodation space, and two pairs of discharge orifices of this accommodation space and this are connected, and this cavity inner surface is the ellipsoid shape; One reflection horizon, it is arranged at this cavity inner surface; One trimming assembly, its be arranged at this two halves cavity at least one of them, this trimming assembly makes this two halves cavity form compartment of terrain and is provided with; And an emissive source assembly and a receiving end assembly, it is arranged at the left and right sides bifocal of this ellipsoid shape cavity inner surface respectively, and the energy that this emissive source assembly sends to this receiving end assembly, and forms a focusing surface through this reflective layer reflects on this receiving end assembly.
The present invention has following useful effect:
(1) energy that sends of emissive source assembly of the present invention to the receiving end assembly, is used the selection that makes the photo-electric gas measuring device than improving and signal strengthens through reflective layer reflects.
(2) the present invention combines for the two halves cavity of same structure.By this, only need the structure of a mould during designing mould, make shaping more easy, and then make the photo-electric gas measuring device make more or less freely and reduce production costs.
(3) trimming assembly of the present invention can be controlled the spacing between the two halves cavity effectively, and then makes the receiving end assembly can receive the energy that the emissive source assembly is sent equably.
For enabling further to understand characteristic of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, but these explanations only are used for explaining the present invention with accompanying drawing, but not protection scope of the present invention are done any restriction.
Description of drawings
Fig. 1 is the synoptic diagram of known optical formula gas measuring device.
Fig. 2 is a flow chart of steps of the present invention.
Fig. 3 is the schematic perspective view of the present invention's half cavity.
Fig. 4 is the three-dimensional exploded view of screw for the present invention's first trimming assembly.
Fig. 5 is the three-dimensional exploded view of pad for the present invention's first trimming assembly.
Fig. 6 is the three-dimensional exploded view of screw for the present invention's second trimming assembly.
Fig. 7 is the synoptic diagram of gas flow to be measured in the cavity of the present invention.
Fig. 8 is the floor map of driving fit between two halves cavity of the present invention.
Fig. 9 is for there being the floor map of spacing between two halves cavity of the present invention.
Figure 10 is a schematic perspective view of the present invention.
Symbol description
1a cavity 11a is to discharge orifice
2a infrared light supply 3a spectral filtering sheet
4a optical sensor 1 half cavitys
11 semi-convection holes, 12 half diffusion holes
13 joggles, 14 engaging grooves
2 reflection horizon, 3 cavitys
31 pairs of discharge orifice 32 diffusion holes
33 accommodation spaces, 4 emissive source assemblies
41 RF transmitters, 411 infrared lights
5 receiving end assemblies, 51 on-dispersive formula optical sensors
511 detection element, 52 focusing surfaces
6 trimming assemblies, 61 first trimming assemblies
611 screws, 612 pads
62 second trimming assemblies, 621 screws
7 circuit board assemblies, 71 first circuit boards
711 adjustment holes, 712 inserted terminals
72 second circuit boards, 721 amplifying circuits
722 adjustment holes, 723 inserted terminals
73 tertiary circuit plates, 731 spliced eyes
74 material-putting spaces, 8 power supply modules
81 batteries, 82 attaching plugs
9 housings, 91 displays
Embodiment
See also Fig. 2 and collocation Fig. 3 to Figure 10, Fig. 2 is a photo-electric gas measuring device step of manufacturing process flow diagram, and its step comprises as follows:
Half cavity mold is provided; And with this half cavity mold shaping two halves cavity 1 (like Fig. 3 and Fig. 4), and this two halves cavity 1 respectively has two semi-convection holes 11, half diffusion hole 12, at least one joggle 13, at least one engaging groove 14 and half the axiolitic inside surface at least; Wherein, half diffusion hole 12, joggle 13 and engaging groove 14 preferable quantity are two, but not as limit.Moreover the forming mode of half cavity 1 can be injection molding or shape is cast in filling.
In the inside surface of this two halves cavity 1 reflection horizon 2 that respectively is shaped.When the forming mode of half cavity 1 is injection molding, in the inside surface coating formation reflection horizon 2 of half cavity 1.And when the forming mode of half cavity 1 is cast shape for filling, half cavity, 1 inside surface is carried out polishing to form reflection horizon 2, perhaps half cavity, 1 inside surface is carried out gold-plated processing to form reflection horizon 2.
This two halves cavity 1 is bonded into a cavity 3 (like Fig. 8); Cavity 3 inside surfaces and reflection horizon all form the ellipsoid shape; And the semi-convection hole 11 of two halves cavity 1 is bonded with each other and forms two pairs of discharge orifices 31; And half diffusion hole 12 can become two diffusion holes 32 by the type of being bonded with each other, and perhaps half diffusion hole 12 forms the type (like Fig. 7) that staggers each other.
One emissive source assembly 4 is provided, this emissive source assembly 4 is arranged at an along of cavity 3 inside surfaces.
One receiving end assembly 5 is provided, this receiving end assembly 5 is arranged at another along of cavity 3 inside surfaces.
One trimming assembly 6 is provided, and it has one first trimming assembly 61 (like Fig. 4 and Fig. 5), with this first trimming assembly 61 be installed in movably this two halves cavity 1 at least one of them.
With the spacing of these two halves cavitys 1 of first trimming assembly 61 adjustment, make energy that this emissive source assembly 4 sends after reflection horizon 2 reflexes to receiving end assembly 5, on receiving end assembly 5, form a focusing surface 52, and this focusing surface 52 can be configured as ellipse or dumb-bell shape.
One circuit board assemblies 7 is provided, and it has a first circuit board 71, a second circuit board 72 and a tertiary circuit plate 73.
Emissive source assembly 4 is electrically connected at this first circuit board 71.An ora terminalis that connects this first circuit board 71 and this two halves cavity 1.
Receiving end assembly 5 is electrically connected at second circuit board 72, and in this second circuit board 72 shapings one amplifying circuit 721 (like Fig. 6).Another ora terminalis that connects this second circuit board 72 and this two halves cavity 1.
One housing 9 and a display 91 (like Figure 10) are provided, this display 91 is arranged at the top of two halves cavity 1 and is fixed on the housing 9 display 91 electric connection tertiary circuit plates 73.
See also Fig. 3 to Figure 10, it is for using the photo-electric gas measuring device of said method manufacturing, wherein; Like Fig. 3 and shown in Figure 4, two halves cavity 1 respectively has two joggles 13 and two engaging grooves 14, and joggle 13 is convexly set in the place that is bonded with each other of two halves cavity 1; And be arranged with formation engaging groove 14 corresponding to joggle 13 places; 14 mutual windings form cavity 3 to two halves cavity 1 with engaging groove with joggle 13, by this, only need the structure of a mould during designing mould; Make shaping and demoulding more easy and easy to assembly, production cost is reduced.In addition, above-mentioned have two joggles 13 and two engaging grooves 14 are example with half cavity 1, but not as limit, half cavity 1 also can have a joggle 13 and an engaging groove 14, or a plurality of joggle 13 and a plurality of engaging grooves 14.
Moreover, the cavity 3 inner accommodation spaces 33 (as shown in Figure 8) that form, this accommodation space 33 is connected respectively with to discharge orifice 31 and diffusion hole 32.By this, gas to be measured can be through flowing in the accommodation space 33 discharge orifice 31 or diffusion hole 32.In addition, the quantity of discharge orifice 31 and diffusion hole 32 is not limited to above-mentioned quantity, it also can be other quantity.
In the time only need using to discharge orifice 31, can be with diffusion hole 32 sealings, by this, gas to be measured flows in cavity 3 with the mode of convection current; And when context is fit to use diffusion hole 32, can be with discharge orifice 31 is sealed.By this, gas to be measured flows in cavity 3 with the mode of diffusion.Therefore, the visual user's situation of photo-electric gas measuring device is selected the gas flow pattern of convection current or diffusion.In addition, diffusion hole 32 can form the type (as shown in Figure 7) that staggers each other, uses preventing air-flow excessive turbulence in cavity 3, and avoids outside spuious thermal source to get in the cavity 3.
Moreover, also can cavity 3 be designed to only have to discharge orifice 31, perhaps only have diffusion hole 32, only make that wherein a kind of user of gas flow pattern is more convenient.
See also Fig. 8; Emissive source assembly 4 has a RF transmitter 41; Receiving end assembly 5 has an on-dispersive formula optical sensor 51; The spectral filter (figure slightly) that the detection element 511 that has at least two group sensing particular range of wavelengths in this on-dispersive formula optical sensor 51, each detection element 511 comprise a sensor chip (figure slightly) and correspond to this sensor chip.One group of detection element 511 wherein is the usefulness of contrast as a reference; But the infrared light 411 that all the other at least one group of detection element 511 receiving infrared-ray transmitters 41 are sent, and can be used to detect in particular range of wavelengths by the infrared light 411 Strength Changes amounts of gas absorption to be measured., those detection element 511 can detect a kind of gas to be measured when being two groups, if those detection element 511 can be detected two kinds of gases to be measured when being three groups, if those detection element 511 can be detected three kinds of gases to be measured when being four groups.
See also Fig. 4, this first trimming assembly 61 can be screw 611, and screw 611 spiral shell one and half cavitys 1 located therein movably, and an end of screw 611 contacts at the place that is bonded with each other of two halves cavity 1.Therefore; Can come to strut a little two halves cavity 1 through the rotation of screw 611; Use the spacing of 1 of adjustment two halves cavity, make infrared light 411 that RF transmitter 41 sends after reflection horizon 2 reflexes to on-dispersive formula optical sensor 51, on on-dispersive formula optical sensor 51, form focusing surface 52; And focusing surface 52 can be configured as ellipse or dumb-bell shape, and then makes each detection element 511 can receive infrared light 411 uniformly.Moreover, also can reflection horizon 2 be configured as non-ideal ellipsoid (figure is slightly), and then reach the effect that each detection element 511 evenly receives infrared light 411.In addition, focusing surface 52 shapes of the present invention are example with ellipse or dumb-bell shape, but not as limit.
In addition; See also Fig. 5, this first trimming assembly 61 also can be pad 612, and this pad 612 is arranged at 1 of two halves cavity; And make focusing surface 52 be configured as ellipse or dumb-bell shape, and then make each detection element 511 can receive infrared light 411 uniformly through the thickness of selecting pad 612.
See also Fig. 6, emissive source assembly 4 welds respectively and is electrically connected on first circuit board 71 and the second circuit board 72 with receiving end assembly 5.And this first circuit board 71 respectively forms an at least one adjustment hole 711,722 and an inserted terminal 712,723 with second circuit board 72; And adjustment hole 711,722 can be microscler; Tertiary circuit plate 73 is formed with two spliced eyes 731 corresponding to inserted terminal 712,723, and first circuit board 71 is inserted in the spliced eye 731 of tertiary circuit plate 73 with inserted terminal 712,723 respectively with second circuit board 72.Wherein, amplifying circuit 721 is formed at second circuit board 72, therefore, in the transmission of signal, can reach and reduce noise effectively.
See also Fig. 6 and Fig. 9; This second trimming assembly 62 can be screw 621; Screw 621 passes the adjustment hole 711,722 of first circuit board 71 and second circuit board 72; And screw 621 can be made move up and down (like Fig. 9) a little in microscler adjustment hole 711,722, thereafter, be locked on half cavity 1 again.By this, can readjust by a small margin the spacing of 1 of two halves cavity, make focusing surface 52 be configured as ellipse or dumb-bell shape, and then make each detection element 511 can receive infrared light 411 uniformly.Moreover second trimming assembly 62, first trimming assembly 61 of not only can arranging in pairs or groups uses (figure slightly), and second trimming assembly 62 also can use separately.In addition, when reality was used, adjustment hole 621 profiles were not limited to microscler, and adjustment hole 621 profiles also can be other shape.
The present invention has easy assembled group cube formula, sees also Fig. 6, and this mode at first is locked in the two ends of two halves cavity 1 with the mode of locking respectively with first circuit board 71 and second circuit board 72, uses the fixedly relative position of two halves cavity 1; With inserting mode first circuit board 71 and second circuit board 72 are fixed on the tertiary circuit plate 73 again; , in splicing position again with the mode of welding first circuit board 71 and second circuit board 72 be welded in tertiary circuit plate 73 on thereafter, last, glue together in weld.It is upright to accomplish assembled group with above-mentioned easy mode, uses further reducing production costs.
See also Fig. 8 and Fig. 9, form a material-putting space 74 between cavity 3 and the circuit board assemblies 7, material-putting space 74 can supply to be provided with or to put various assembly and part.
In addition, the photo-electric gas measuring device can transmit alerting through circuit board assemblies 7 and give the user, or combines with air-conditioning system, by this, is applied to the various environment that need detecting gas.
See also Figure 10; The present invention can further provide a power supply module 8, and this power supply module 8 electrically connects circuit board assemblies 7, if need carry the time; Power supply module can use battery 81 to provide the photo-electric gas measuring device required electric energy; If only be placed in fixed point, then can use attaching plug 82 to be inserted in the socket of power supply, use the electric energy that provides the photo-electric gas measuring device required.In addition, a display 91 is set on this housing 9, display 91 electrically connects circuit board assemblies 7, and using provides the photo-electric gas measuring device gas concentration that detecting real-time arrives.
(characteristics of the present invention)
(1) the present invention is arranged at the bifocal of ellipsoid shape cavity 3 inside surfaces respectively with emissive source assembly 4 and receiving end assembly 5, and is coated with reflection horizon 2 in cavity 3 inside surfaces, makes energy that emissive source assembly 4 sends 2 reflex to receiving end assembly 5 through the reflection horizon.The selection that by this, can make the photo-electric gas measuring device is than improving and the signal enhancing.
(2) cavity 3 of the present invention combines for the two halves cavity 1 of same structure.By this, only need the structure of a mould during designing mould, make shaping more easy, and then make the photo-electric gas measuring device make more or less freely and reduce production costs.
(3) cavity 3 of the present invention has discharge orifice 31 and diffusion hole 32.By this, visual situation is selected the gas flow pattern of convection current or diffusion, uses the demand that meets the user.
(4) diffusion hole 32 of the present invention can form the type that staggers, and uses to prevent air-flow excessive turbulence in cavity 3, and avoids having in the cavity 3 outside spuious thermal source to get into.
(5) trimming assembly 6 of the present invention can be controlled the spacing of 1 of two halves cavity effectively, uses to make focusing surface 52 can be configured as ellipse or dumb-bell shape, and then makes on-dispersive formula optical sensor 51 can receive infrared light 411 uniformly.
(6) amplifying circuit 721 of the present invention is formed at second circuit board 72, therefore, in the transmission of signal, can reduce noise effectively.
(7) power supply module 8 of the present invention has battery 81 and attaching plug 82.By this, can carry the photo-electric gas measuring device, perhaps the photo-electric gas measuring device is arranged at fixed point.
The above exposure is merely preferred embodiment of the present invention, and from not limiting protection scope of the present invention with this, the equalization of therefore doing according to application range of the present invention changes or modifies, and still belongs to the scope that the present invention is contained.
Claims (15)
1. photo-electric gas measuring device manufacturing approach is characterized in that step comprises:
Half cavity mold is provided;
With this half cavity mold shaping two halves cavity, and this two halves cavity respectively has two semi-convection holes and half the axiolitic inside surface;
In the inside surface of this two halves cavity reflection horizon that respectively is shaped;
This two halves cavity is bonded into a cavity, and this cavity inner surface forms the ellipsoid shape, and the semi-convection hole of this two halves cavity is bonded with each other and forms two pairs of discharge orifices;
One emissive source assembly is provided, this emissive source assembly is arranged at the along of this cavity inner surface; And
One receiving end assembly is provided, this receiving end assembly is arranged at another along of this cavity inner surface.
2. photo-electric gas measuring device manufacturing approach as claimed in claim 1 is characterized in that, the forming mode of this two halves cavity is that shape is cast in injection molding or filling.
3. photo-electric gas measuring device manufacturing approach as claimed in claim 2 is characterized in that, when the forming mode of this two halves cavity is injection molding, in this reflection horizon of inside surface coating formation of this two halves cavity.
4. photo-electric gas measuring device manufacturing approach as claimed in claim 2; It is characterized in that; When the forming mode of this two halves cavity is cast shape for filling; This two halves cavity inner surface is carried out polishing to form this reflection horizon, perhaps this two halves cavity inner surface is carried out gold-plated processing to form this reflection horizon.
5. photo-electric gas measuring device manufacturing approach as claimed in claim 1 is characterized in that this two halves cavity respectively is formed with at least one diffusion hole.
6. photo-electric gas measuring device manufacturing approach as claimed in claim 1 is characterized in that this two halves cavity respectively is formed with at least one joggle and at least one engaging groove.
7. photo-electric gas measuring device manufacturing approach as claimed in claim 1 is characterized in that step further comprises:
One trimming assembly is provided, with this trimming assembly be installed in movably this two halves cavity at least one of them; And
With the spacing of this two halves cavity of this trimming assembly adjustment, make energy that this emissive source assembly sends through this reflective layer reflects behind this receiving end assembly, on this receiving end assembly, form a focusing surface.
8. photo-electric gas measuring device manufacturing approach as claimed in claim 7 is characterized in that, the spacing with this this two halves cavity of trimming assembly adjustment makes this focusing surface be configured as ellipse or dumb-bell shape.
9. photo-electric gas measuring device manufacturing approach as claimed in claim 1 is characterized in that step further comprises:
One first circuit board is provided, this emissive source assembly is electrically connected at this first circuit board;
An ora terminalis that connects this first circuit board and this two halves cavity;
One second circuit board is provided, this receiving end assembly is electrically connected at this second circuit board, and in this second circuit board amplifying circuit that is shaped;
Another ora terminalis that connects this second circuit board and this two halves cavity; And
One tertiary circuit plate is provided, this tertiary circuit plate is arranged at the below of this two halves cavity, this first circuit board and this second circuit board are connected to the both sides of this tertiary circuit plate.
10. photo-electric gas measuring device manufacturing approach as claimed in claim 9; It is characterized in that; This first circuit board and this two halves cavity one ora terminalis and this second circuit board and this another ora terminalis of two halves cavity be installing one trimming assembly further, makes this two halves cavity produce relative displacement with this trimming assembly.
11. photo-electric gas measuring device manufacturing approach as claimed in claim 9 is characterized in that step further comprises: a display is provided, this display is arranged at the top of this two halves cavity, and this display electrically connects this tertiary circuit plate.
12. a photo-electric gas measuring device is characterized in that, comprising:
One cavity, its half cavity by two same structures engages and forms, and this cavity has two pairs of discharge orifices, and this inside cavity forms an accommodation space, and two pairs of discharge orifices of this accommodation space and this are connected, and this cavity inner surface is the ellipsoid shape;
One reflection horizon, it is arranged at this cavity inner surface;
One trimming assembly, its be arranged at this two halves cavity at least one of them, this trimming assembly makes this two halves cavity form compartment of terrain and is provided with; And
An one emissive source assembly and a receiving end assembly, it is arranged at the left and right sides bifocal of this ellipsoid shape cavity inner surface respectively, and the energy that this emissive source assembly sends arrives this receiving end assembly through this reflective layer reflects, and on this receiving end assembly, forms a focusing surface.
13. photo-electric gas measuring device as claimed in claim 12 is characterized in that, this focusing surface is ellipse or dumb-bell shape.
14. photo-electric gas measuring device as claimed in claim 12 is characterized in that, this two halves cavity respectively has a diffusion hole, and this accommodation space is connected with this two diffusion hole.
15. photo-electric gas measuring device as claimed in claim 12; It is characterized in that; Further have a circuit board assemblies, this circuit board assemblies is arranged at the both sides and the below of this cavity, and this circuit board assemblies electrically connects this emissive source assembly and this receiving end assembly; And a display, it is arranged at the top of this cavity, and this display electrically connects this circuit board assemblies; Wherein, This circuit board assemblies has a first circuit board, a second circuit board and a tertiary circuit plate; These cavity both sides are connected to this first circuit board and this second circuit board, and this tertiary circuit plate is arranged at this cavity below, and this first circuit board has an adjustment hole; This trimming assembly passes this adjustment hole and this first circuit board is fixed in this cavity, and this trimming assembly moves in this adjustment hole and makes this two halves cavity form the compartment of terrain setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102354430A CN102338737A (en) | 2010-07-21 | 2010-07-21 | Photoelectric gas sensing device and its manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102354430A CN102338737A (en) | 2010-07-21 | 2010-07-21 | Photoelectric gas sensing device and its manufacturing method |
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| CN102338737A true CN102338737A (en) | 2012-02-01 |
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| CN2010102354430A Pending CN102338737A (en) | 2010-07-21 | 2010-07-21 | Photoelectric gas sensing device and its manufacturing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111226A (en) * | 2014-08-07 | 2014-10-22 | 中国科学院上海微系统与信息技术研究所 | Small-size and long-optical-path optical cavity for gas detection |
| CN106663356A (en) * | 2014-07-14 | 2017-05-10 | 日本汾沃控制有限公司 | Photoelectric smoke sensor |
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| CN1228839A (en) * | 1996-08-28 | 1999-09-15 | 汉斯·戈兰·伊瓦尔德·马丁 | Gas sensor |
| CN1890554A (en) * | 2003-12-12 | 2007-01-03 | Elt株式会社 | Gas sensor |
| US20070114421A1 (en) * | 2005-11-23 | 2007-05-24 | Reinhold Maehlich | Gas Sensor Array with a Light Channel in the Form of a Conical Section Rotational Member |
| CN201681044U (en) * | 2010-03-25 | 2010-12-22 | 友丽系统制造股份有限公司 | Photoelectric type gas sense module and device thereof |
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| US5334154A (en) * | 1992-08-04 | 1994-08-02 | Advanced Cardiovascular Systems, Inc. | Perfusion type dilatation catheter having perfusion ports with depressed proximal edges |
| US5726752A (en) * | 1995-08-07 | 1998-03-10 | Fuji Electric Co., Ltd. | Sample cell of multiple reflection type |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106663356A (en) * | 2014-07-14 | 2017-05-10 | 日本汾沃控制有限公司 | Photoelectric smoke sensor |
| CN106663356B (en) * | 2014-07-14 | 2019-02-22 | 日本汾沃控制有限公司 | Photoelectric smoke sensor |
| CN104111226A (en) * | 2014-08-07 | 2014-10-22 | 中国科学院上海微系统与信息技术研究所 | Small-size and long-optical-path optical cavity for gas detection |
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Application publication date: 20120201 |