CN204286998U - particle concentration sensor - Google Patents
particle concentration sensor Download PDFInfo
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- CN204286998U CN204286998U CN201420840602.3U CN201420840602U CN204286998U CN 204286998 U CN204286998 U CN 204286998U CN 201420840602 U CN201420840602 U CN 201420840602U CN 204286998 U CN204286998 U CN 204286998U
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- 239000002245 particle Substances 0.000 title claims abstract description 76
- 238000004891 communication Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 abstract description 13
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000013341 scale-up Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
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Abstract
The utility model discloses a kind of particle concentration sensor, comprise housing, the first laser generator assembly, the second laser generator assembly, circuit board, baffle plate and photo-sensitive cell.Particle concentration sensor of the present utility model is after use first laser generator assembly a period of time, can be calibrated the result measured by described first laser generator assembly by the second laser generator assembly, if error within the specific limits, then show that the duty of described first laser generator assembly is normal, otherwise enable the second laser generator assembly and carry out particle concentration test, and notified the state of the first laser generator assembly described in user by failure code, to make user can on-call maintenance; Can be found out by said process, particle concentration sensor of the present utility model can improve the accuracy of detection of himself, but also can improve its serviceable life.
Description
Technical field
The utility model relates to particle pick-up unit, particularly relates to a kind of particle concentration sensor.
Background technology
Existing particle concentration sensor, the sensor of suspended particulate substance quality concentration in detection air such as disclosed in Chinese patent CN203798703U, generally comprise a laser transmitter device and a laser pick-off device, but this particle concentration sensor after a long time use, because semiconductor laser belongs to sensitive element, along with the lengthening of working time, there will be the trend of decay, or be likely subject to certain impact and damage, now, due to the key element that laser instrument is particulate matter sensors, once laser attenuation or damage, then the precision of sensor own can be affected, cause testing result no longer accurate.
Utility model content
The utility model object is to provide a kind of particle concentration sensor, and it has accurate accuracy of detection when Long-Time Service.
The utility model technical solution problem adopts following technical scheme: a kind of particle concentration sensor, comprises housing, the first laser generator assembly, the second laser generator assembly, circuit board, baffle plate and photo-sensitive cell;
Described circuit board level is arranged in described housing,
Described first laser generator assembly and the second laser generator assembly are fixed on described circuit board, and the second laser beam that described first laser generator assembly first laser beam of launching and the second laser generator assembly are launched aloft intersects, and described first laser beam is parallel with the plane at described photo-sensitive cell place with the plane at the second laser beam place, the projection of the intersection point of described first laser beam and the second laser beam is positioned at described photo-sensitive cell scope;
Described baffle plate is fixed on described housing, and described circuit board, the first laser generator assembly, is formed with air communication channel between the second laser generator assembly and baffle plate;
Described photo-sensitive cell is fixed on described circuit board, and described photo-sensitive cell is fixed on described circuit board, and described photo-sensitive cell is positioned at the downside of described air communication channel.
Optionally, the angle between described first laser beam and the second laser beam is 15-90 degree.
Optionally, described housing comprises roof, diapire and is fixed on front side wall, rear wall, left side wall and the right side wall between described roof and diapire;
Described circuit board is parallel to described roof;
Described baffle plate is fixed on described roof, and is positioned at described housing.
Optionally, described baffle plate is two, has gap between described two baffle plates.
Optionally, the intersection point of described first laser beam and the second laser beam is the focus of described first laser generator assembly and the second laser generator assembly.
Optionally, described first laser generator assembly is identical with the structure of the second laser generator assembly, includes laser socket, laser generator, convex lens and diaphragm;
Described laser socket is fixed on described circuit board, and described laser generator is fixed in described laser socket, and launches laser beam; Described convex lens are arranged in described laser socket, and are positioned at the front end of described laser generator, focus on the laser beam of launching described laser generator; Described diaphragm is fixed on described laser socket, along the direction of propagation of described laser beam, is positioned at the downstream of described convex lens.
The utility model has following beneficial effect: particle concentration sensor of the present utility model is owing to having the first laser generator assembly and the second laser generator assembly, therefore, it is after use first laser generator assembly a period of time, can be calibrated the result measured by described first laser generator assembly by the second laser generator assembly, to judge when use first laser generator assembly measures particle concentration, consequently accurately no, if coming to the same thing measured by described first laser generator assembly and the second laser generator assembly, or error within the specific limits, then show that the duty of described first laser generator assembly is normal, otherwise then enable the second laser generator assembly and carry out particle concentration test, and the state of the first laser generator assembly described in user is notified by failure code, to make user can on-call maintenance, can be found out by said process, particle concentration sensor of the present utility model can improve the accuracy of detection of himself, but also can improve its serviceable life.
Accompanying drawing explanation
Fig. 1 is the structural representation of particle concentration sensor of the present utility model;
Fig. 2 is the structural representation of another angle of particle concentration sensor of the present utility model; ;
Fig. 3 is the Cleaning Principle schematic diagram of particle concentration sensor of the present utility model;
Fig. 4 is the structural representation of the first laser generator assembly (or second laser generator assembly) of particle concentration sensor of the present utility model;
In figure, mark is illustrated as: 1-housing; 2-first laser generator assembly; 3-second laser generator assembly; 4-circuit board; 5-baffle plate; 6-roof; 8-front side wall; 9-rear wall; 10-left side wall; 11-right side wall; 12-concave mirror; 13-photo-sensitive cell; 14-laser socket; 15-laser generator; 16-convex lens; 17-diaphragm.
Embodiment
Below in conjunction with embodiment, the technical solution of the utility model is further elaborated.
Embodiment 1
Present embodiments provide a kind of particle concentration sensor, it comprises housing 1, first laser generator assembly 2, second laser generator assembly 3, circuit board 4, baffle plate 5 and photo-sensitive cell 13;
Air communication channel is formed between described circuit board 4, first laser generator assembly 2, second laser generator assembly 3 and baffle plate 5;
Described housing 1 comprises roof 6, diapire and is fixed on front side wall 8, rear wall 9, left side wall 10 and the right side wall 11 between described roof 6 and diapire; Described roof 6 is parallel to described diapire, and described circuit board 4 is fixed in described housing 1, and is parallel to described roof 6, and described baffle plate 5 is fixed on described roof 6, and is positioned at described housing 1, and extends to described circuit board 4 side; The front side wall 8 of described housing 1 offers air outlet, described rear wall 9 offers air inlet, described circuit board 4 is positioned at the top of described air inlet, and described air outlet is divided into upper air outlet and lower air outlet, respectively as more than diameter 10um and the outlet of following particle; More preferably, on described circuit board 4, multiple segmentation holes can be offered near described air inlet; Described segmentation holes is the starting point of described air communication channel;
Described first laser generator assembly 2 and the second laser generator assembly 3 are all arranged on described circuit board 4, and be positioned at described housing 1, the first laser beam that described first laser generator assembly 2 is launched and the second laser beam that the second laser generator assembly 3 is launched aloft intersect, and described first laser beam is parallel with the plane at described photo-sensitive cell 13 place with the plane at the second laser beam place, the projection of the intersection point of described first laser beam and the second laser beam is positioned at described photo-sensitive cell 13 scope; In the present embodiment, more preferably, the angle between described first laser beam and the second laser beam is 15-90 degree; The intersection point of described first laser beam and the second laser beam is the focus of described first laser beam and the second laser beam, and described focus is positioned at the scope of described photo-sensitive cell; Also described air communication channel is positioned at;
When described laser irradiates in particle, scattering can be produced.For improving the collection efficiency of the laser of described scattering, in the present embodiment, described particle concentration sensor can also comprise concave mirror, described concave mirror 12 is arranged on described roof 6, and be positioned at described housing 1, and described photo-sensitive cell 13 is arranged on described circuit board 4, described concave mirror 12 and photo-sensitive cell 13 lay respectively at the both sides up and down of described air communication channel, described concave mirror 12 intersects vertically with described air communication channel respectively with the line of described photo-sensitive cell 13, and the concave direction of described concave mirror 12 is towards described photo-sensitive cell 13, to irradiate the light focusing of particle time institute scattering to described laser to described photo-sensitive cell 13.
In the present embodiment, described first laser generator assembly 2 is identical with the structure of the second laser generator assembly 3, and it includes laser socket 14, laser generator 15, convex lens 16 and diaphragm 17;
Described laser socket 14 is fixed on described circuit board 4, and described laser generator 15 is fixed in described laser socket 14, and launches laser beam; Described convex lens 16 are arranged in described laser socket 14, and are positioned at the front end of described laser generator 15, focus on the laser beam of launching described laser generator 15; Described diaphragm 17 is fixed on described laser socket 14, and along the direction of propagation of described laser beam, be positioned at the downstream of described convex lens 16, described diaphragm 17 is for improving the consistance of laser beam.
In the present embodiment, the length of described laser socket 14 is less than 32mm, and the focal length of described convex lens 16 is less than 15mm, thus the size of described particle concentration sensor is reduced, convenient by the system of described sensor integration in other.
In the present embodiment, preferably, the scattered light that the photo-sensitive cell 13 collecting granules thing of described particle concentration sensor produces laser beam scattering, wherein the scattered light in 75 degree of-105 degree direction is directly collected by photo-sensitive cell, the scattered light in 165 degree of-195 degree direction is collected by the concave mirror on photo-sensitive cell opposite and reflexes on photo-sensitive cell 13, scattered light is converted into electric signal outputs to filter amplification circuit to photo-sensitive cell 13 simultaneously, be directed to the process of this signal, can with reference to the content disclosed in Chinese patent CN203798703U, add in the utility model in this as quoting, do not repeating one by one.
In the present embodiment, optionally, described laser socket 14 is closed independently laser socket, to prevent dust etc. from entering described laser socket, reduces the precision of described sensor; And when it also avoid inner light path by contamination by dust, the problem that maintenance cost is higher.
In the present embodiment, described air communication channel is in " several " font, and described baffle plate 5 is two pieces, has gap between described two pieces of baffle plates 5, and described first laser beam and the second laser beam enter light trapping through described gap.
In the present embodiment, described particle concentration sensor can detect the mass concentration of suspended particulate substance in gas.
Particle concentration sensor of the present utility model is owing to having the first laser generator assembly 2 and the second laser generator assembly 3, therefore, it is after use first laser generator assembly 2 a period of time, can be calibrated the result measured by described first laser generator assembly 2 by the second laser generator assembly 3, to judge when use first laser generator assembly 2 measures particle concentration, consequently accurately no, if coming to the same thing measured by described first laser generator assembly 2 and the second laser generator assembly 3, or error within the specific limits, then show that the duty of described first laser generator assembly 2 is normal, otherwise then enable the second laser generator assembly 3 and carry out particle concentration test, and the state of the first laser generator assembly 2 described in user is notified by failure code, to make user can on-call maintenance, can be found out by said process, particle concentration sensor of the present utility model can improve the accuracy of detection of himself, but also can improve its serviceable life.
Embodiment 2
Present embodiments provide a kind of particle concentration detection method, it adopts above-mentioned particle concentration sensor, comprises the following steps:
S10, when described particle concentration sensor first time works, perform step S20, otherwise perform step S30;
S20, the first laser generator assembly of described particle concentration sensor and the second laser generator assembly to be demarcated;
S30, with the first laser generator assembly for main laser generator, with the second laser generator assembly for reference laser generator detects the particle in gas; Using the result of described main laser generator detection as final particle concentration data.
In the present embodiment, described step S20 is specially:
S201, open described particle concentration sensor, make the first laser generator component operation, first laser beam of being launched by described first laser generator assembly carries out particle concentration detection, and obtain the first particle concentration D1, now described second laser generator does not work;
S202, close the first laser generator assembly, make the second laser generator component operation, second laser beam of being launched by second laser assembly carries out particle concentration detection, obtains the second particle concentration D2;
S203, according to described first particle concentration and the second particle concentration, obtain the scale-up factor k=D1/D2 of the first laser generator assembly and the second laser generator module testing result, and preserve.The measurement data of described first laser generator assembly and the second laser generator assembly can be unified by described scale-up factor, if be namely as the criterion with the result D1 measured by the first laser generator assembly, when adopting described second laser generator assembly to be main laser, its net result is K × D2.
Described particle concentration detection method also comprises:
S40, when described first laser generator component operation a period of time or after using certain number of times, open described second laser generator assembly, described first laser generator assembly and the second laser generator assembly successively detect by the particle content in the gas in described air communication channel; Described a period of time can be 1 hour, and described certain number of times can be 5000 times;
S50, determine scale-up factor k according to S203, compare the first particle concentration D1 of being detected by the first laser generator assembly and the second particle concentration D2 by the second laser generator component detection; Second particle concentration equivalent D2 '=K × D2 is obtained according to described second particle concentration D2;
S60, when the absolute value of the difference of described first particle concentration D1 and the second particle concentration equivalent D2 ' is less than or equal to threshold value, using described first particle concentration as testing result; Described threshold value can be D1/10.
S70, when the absolute value of the difference of described first particle concentration D1 and the second particle concentration equivalent D2 ' is greater than threshold value, redefine the scale-up factor k '=D1/D2 ' between the first laser generator assembly and the second laser generator assembly, change the second laser generator assembly is main laser generator simultaneously, and to change the first laser generator assembly be reference laser generator; The duty simultaneously marking described particle concentration sensor by failure code is the duty of the second laser generator assembly; The testing result that now described particle concentration sensor exports is D2 '.
In the present embodiment, described particle concentration detection method also comprises:
S80, when described second laser generator component operation a period of time or after using certain number of times, open described first laser generator assembly, described second laser generator assembly and the first laser generator assembly successively detect by the particle content in the gas in described air communication channel; Described a period of time can be 1 hour, and described certain number of times can be 5000 times;
S90, determine scale-up factor k ' according to S70, compare the first particle concentration D1 of being detected by the first laser generator assembly and the second particle concentration D2 by the second laser generator component detection; First particle concentration equivalent D1 '=D1/k ' is obtained according to described first particle concentration D1;
S91, when the absolute value of the difference of described first particle concentration equivalent D1 ' and the second particle concentration equivalent D2 ' is less than or equal to threshold value, using described second particle concentration equivalent as testing result; Described threshold value can be D1/10.
S92, when the absolute value of the difference of described first particle concentration equivalent D1 ' and the second particle concentration equivalent D2 ' is greater than threshold value, be that laser generator is abnormal by particle concentration working sensor state described in code signing.
The sequencing of above embodiment, only for ease of describing, does not represent the quality of embodiment.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (6)
1. a particle concentration sensor, is characterized in that, comprises housing, the first laser generator assembly, the second laser generator assembly, circuit board, baffle plate and photo-sensitive cell;
Described circuit board level is arranged in described housing,
Described first laser generator assembly and the second laser generator assembly are fixed on described circuit board, and the second laser beam that described first laser generator assembly first laser beam of launching and the second laser generator assembly are launched aloft intersects, and described first laser beam is parallel with the plane at described photo-sensitive cell place with the plane at the second laser beam place, the projection of the intersection point of described first laser beam and the second laser beam is positioned at described photo-sensitive cell scope;
Described baffle plate is fixed on described housing, and described circuit board, the first laser generator assembly, is formed with air communication channel between the second laser generator assembly and baffle plate;
Described photo-sensitive cell is fixed on described circuit board, and described photo-sensitive cell is positioned at the downside of described air communication channel.
2. particle concentration sensor according to claim 1, is characterized in that, the angle between described first laser beam and the second laser beam is 15-90 degree.
3. particle concentration sensor according to claim 2, is characterized in that, described housing comprises roof, diapire and is fixed on front side wall, rear wall, left side wall and the right side wall between described roof and diapire;
Described circuit board is parallel to described roof;
Described baffle plate is fixed on described roof, and is positioned at described housing.
4. particle concentration sensor according to claim 3, is characterized in that, described baffle plate is two, has gap between described two baffle plates.
5. particle concentration sensor according to claim 4, is characterized in that, the intersection point of described first laser beam and the second laser beam is the focus of described first laser generator assembly and the second laser generator assembly.
6. particle concentration sensor according to claim 5, is characterized in that, described first laser generator assembly is identical with the structure of the second laser generator assembly, includes laser socket, laser generator, convex lens and diaphragm;
Described laser socket is fixed on described circuit board, and described laser generator is fixed in described laser socket, and launches laser beam; Described convex lens are arranged in described laser socket, and are positioned at the front end of described laser generator, focus on the laser beam of launching described laser generator; Described diaphragm is fixed on described laser socket, along the direction of propagation of described laser beam, is positioned at the downstream of described convex lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420840602.3U CN204286998U (en) | 2014-12-24 | 2014-12-24 | particle concentration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420840602.3U CN204286998U (en) | 2014-12-24 | 2014-12-24 | particle concentration sensor |
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| CN204286998U true CN204286998U (en) | 2015-04-22 |
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| CN201420840602.3U Active CN204286998U (en) | 2014-12-24 | 2014-12-24 | particle concentration sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784552A (en) * | 2014-12-24 | 2016-07-20 | 周志斌 | Particle concentration sensor and particle concentration detection method |
| CN108779995A (en) * | 2016-01-27 | 2018-11-09 | 帕拉贡股份公司 | Sensor for detecting environmental parameter and the method for calibrating this sensor |
| WO2023159789A1 (en) * | 2022-02-28 | 2023-08-31 | 江苏南大光电材料股份有限公司 | Gc-aed related technology and method for analysis and detection for ppb content of germane impurities in high purity phosphine |
-
2014
- 2014-12-24 CN CN201420840602.3U patent/CN204286998U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784552A (en) * | 2014-12-24 | 2016-07-20 | 周志斌 | Particle concentration sensor and particle concentration detection method |
| CN105784552B (en) * | 2014-12-24 | 2019-08-06 | 周志斌 | Particle concentration detection method |
| CN108779995A (en) * | 2016-01-27 | 2018-11-09 | 帕拉贡股份公司 | Sensor for detecting environmental parameter and the method for calibrating this sensor |
| CN108779995B (en) * | 2016-01-27 | 2021-08-24 | 帕拉贡股份公司 | Sensor for detecting an environmental parameter and method for calibrating such a sensor |
| WO2023159789A1 (en) * | 2022-02-28 | 2023-08-31 | 江苏南大光电材料股份有限公司 | Gc-aed related technology and method for analysis and detection for ppb content of germane impurities in high purity phosphine |
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Effective date of registration: 20170421 Address after: 315300 Cixi City, Zhejiang Province emerging industrial clusters in the streets of the Han Han Road, No. 1 emerging Patentee after: Ningbo akebi Intelligent Technology Co Ltd Address before: 101300 Beijing City, Shunyi District houshayu Yu Xi Road No. 9 Building No. 9 hospital 603 Patentee before: Beijing akala Science and Technology Ltd. |
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Assignee: Beijing akala Science and Technology Ltd. Assignor: Ningbo Saiteng fly Technology Co. Ltd. Contract record no.: 2018990000143 Denomination of utility model: Particulate matter concentration sensor based on true root-mean-square detection Granted publication date: 20150422 License type: Exclusive License Record date: 20180601 |
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Assignee: Beijing akala Science and Technology Ltd. Assignor: Ningbo Saiteng fly Technology Co. Ltd. Contract record no.: 2018990000143 Date of cancellation: 20180625 |
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Effective date of registration: 20190924 Address after: 100000 Beijing City, Shunyi District houshayu Yu Xi Road No. 9 Building No. 9 hospital 6 floor room 603 Patentee after: Beijing akala Science and Technology Ltd. Address before: 315300 Xinxing Road No. 1, Zonghan Street, Xinxing Industrial Cluster District, Cixi City, Ningbo City, Zhejiang Province Patentee before: Ningbo akebi Intelligent Technology Co Ltd |
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