CN204613066U - A kind of dust detecting sensor based on LASER Light Source - Google Patents
A kind of dust detecting sensor based on LASER Light Source Download PDFInfo
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Abstract
The utility model discloses a kind of dust detecting sensor based on LASER Light Source, comprise sensor housing, described sensor housing arranges power supply, air intake and air out, described air out place provided with fan, in described sensor housing, measuring chamber is set, generating laser, described measuring chamber arranges opening, described opening part arranges path channels, photelectric receiver is set gradually along signal transfer direction in described measuring chamber, filtering and amplifying circuit and microprocessor, setting data harvester on described microprocessor, data processing equipment, data output device and memory storage.The beneficial effects of the utility model are: air out arranges fan and accelerates air flowing, make sampled air fast, smooth, stablely pass through measuring chamber, make to measure response rapidly, the design of laser optical path passage makes dust by reflective light intensity during measuring chamber, thus acquisition clear signal, increase and measure Numerical accuracy, detect the concentration of the molecule in air accurately.
Description
Technical field
The utility model relates generally to air particle detection field, specifically a kind of dust detecting sensor based on LASER Light Source.
Background technology
Air refers to and is enclosed in atmosphere; it maintains the existence of the mankind and biology; but along with development that is industrial and transportation, a large amount of objectionable impuritiess is discharged in air; change the normal composition of air; air quality is degenerated, and Atmospheric particulates are a kind of important air pollutants, and dust is one of important indicator evaluating Atmospheric particulates; dust sensor can measure the concentration of dust in air, makes corresponding safeguard measure in order to instruct people.
At present, the dust sensor majority on market is the dust sensor based on infrared LED light source, there are some problems when in use:
1, existing infrared led dust sensor due to LED light source energy weak, the signal gathered after particle reflection is more weak, to such an extent as to the responding range exceeding signals collecting part causes measurement range little, and then causes accuracy in detection poor;
2, existing infrared led dust sensor sampling air flow imports is use heating resistor to add hot-air to cause convection current, and the air flowing that this air guide method causes is too slow, thus makes sensor response speed slow, and response speed is slow, and measuring accuracy is low;
3, also there is the bad and easy interference by external electromagnetic ripple of data consistency in existing infrared led dust sensor, is also limited to the life-span of laser serviceable life, just there will be and measure inaccurate problem after using the regular hour;
4, existing infrared led dust sensor, has dust stratification, Eikonometric accuracy after long-time use.
Utility model content
For solving deficiency of the prior art, a kind of dust detecting sensor based on LASER Light Source of the utility model, special air sampling Design ensures that sampled air is quick, smooth, stable and passes through measuring chamber, make to measure response rapidly, the design of laser optical path passage makes dust by reflective light intensity during measuring chamber, thus acquisition clear signal, make to measure numerical value more accurate, detect the concentration of the molecule in air accurately.
The utility model for achieving the above object, is achieved through the following technical solutions:
A kind of dust detecting sensor based on LASER Light Source, comprise sensor housing, described sensor housing is arranged air intake and air out, described air out place provided with fan, in described sensor housing, circuit board is set, measuring chamber, generating laser, described circuit board arranges power supply, described measuring chamber respectively with air intake, air out is communicated with, described measuring chamber arranges opening, described opening part arranges path channels, described path channels one end is connected with measuring chamber, the other end is connected with generating laser, photelectric receiver is set gradually along signal transfer direction in described measuring chamber, filtering and amplifying circuit and microprocessor, setting data harvester on described microprocessor, data processing equipment, data output device and memory storage, described fan, photelectric receiver, generating laser is all connected with power electric with microprocessor.
In described generating laser, built-in lens is set.
Described data output device is that serial ports exports or pwm signal exports.
Described data output device arranges display.
Described filtering and amplifying circuit arranges radome, described radome arranges earthing device.
Described sensor housing arranges plating.
Contrast and prior art, the utility model beneficial effect is:
1, the utility model measuring chamber is directly communicated with air intake, air out, air out arranges fan and accelerates air flowing, special air sampling design, make sampled air fast, smooth, stablely pass through measuring chamber, make to measure response rapidly, the design of laser optical path passage makes dust by reflective light intensity during measuring chamber, thus obtains clear signal, increase and measure Numerical accuracy, detect the concentration of the molecule in air accurately;
2, in the utility model generating laser, built-in lens is set, laser is carried out focusing on signal intensity when strengthening particle reflection, increases the accuracy of measurement result;
3, the utility model photelectric receiver can experience the light intensity of laser, when generating laser power drop causes laser intensity to decline, microprocessor declines to the light intensity caused by decaying and does corresponding compensation, ensures measurement data accuracy, increases the service time of sensor;
4, the utility model arranges radome and earthing device, shields the impact of outer bound pair amplifying circuit, solves laser instrument and is subject to interference problem, strengthen rugged surroundings repellence;
5, the utility model sensor outer housing arranges plating, makes the electromagnetic interference (EMI) in the grounded shield external world after housings conductive;
6, the utility model data output device arranges display, person easy to use observes testing result.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model;
Accompanying drawing 2 is structured flowcharts of the utility model data monitoring;
Accompanying drawing 3 is structural representations of the utility model radome.
Label shown in accompanying drawing: 1, sensor housing; 11, air intake; 12, air out; 2, power supply; 3, fan; 4, measuring chamber; 41, opening; 5, generating laser; 6; Path channels; 7, photelectric receiver; 8, filtering and amplifying circuit; 81, radome; 82, earthing device; 91, data collector; 92, data processing equipment; 93, data output device.
Embodiment
By reference to the accompanying drawings and specific embodiment, the utility model is described in further detail.Should be understood that these embodiments are only not used in restriction scope of the present utility model for illustration of the utility model.In addition should be understood that those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the utility model instruction.
A kind of dust detecting sensor based on LASER Light Source, comprise sensor housing 1, described sensor housing 1 is arranged power supply 2, air intake 11 and air out 12, power supply 2 provides power for whole device, air is entered by air intake 11, leave sensor by air out 12 again, form an air sampling passage.Described air out 12 place provided with fan 3, accelerates air flowing, and what guarantee sampled air was quick, smooth passes through air sampling passage.Circuit board, measuring chamber 4, generating laser 5 are set in described sensor housing 1, described circuit board is arranged power supply 2, described measuring chamber 4 is communicated with air intake 11, air out 12 respectively, and special air sampling Design makes sampled air stable by measuring chamber 4, makes to measure response rapidly.Overcome the flowing of traditional infrared led dust sensor sampled air slowly from causing sensor to the slow shortcoming of signal response.Described measuring chamber 4 arranges opening 41, described opening 41 place arranges path channels 6, described path channels 6 one end is connected with measuring chamber 4, the other end is connected with generating laser 5, optically focused is carried out to laser, make dust by reflective light intensity during measuring chamber 4, thus acquisition clear signal, enlarge measurement range, increase and measure Numerical accuracy, to detect the concentration of the molecule in air accurately, the accuracy of measurement result and confidence level are improved greatly, overcome traditional infrared led dust sensor measurement range little, the inaccurate shortcoming of measurement result.Photelectric receiver 7, filtering and amplifying circuit 8 and microprocessor is set gradually along signal transfer direction in described measuring chamber 4, setting data harvester 91, data processing equipment 92, data output device 93 and memory storage on described microprocessor, when detecting that generating laser 5 power drop causes laser intensity to decline, antidamping algorithm is used to do corresponding compensation to microprocessor to the light intensity decline caused by decaying, ensure measurement data accuracy, the service time of sensor can be increased.Harvester preferably adopts high-speed AD acquisition device, microprocessor is analyzed the AD signal gathered, the number of distinguishing particles thing signal pulse and height, the quantity of corresponding particle and size, after reference instrument calibration, obtain corresponding mass density data, with after export through data output device 93.Described fan 3, photelectric receiver 7, generating laser 5 and microprocessor are all electrically connected with power supply 2.Measuring process is: the fan 3 of gas outlet outwards blows, sampled air is guided to enter measuring chamber 4 from air intake opening, scattering is there is in particle through laser-irradiated domain, scattered light signal is converted into electric signal through photelectric receiver 7 receptions, this signal through filtering and amplifying circuit 8 amplify and after filtering collected enter microprocessor, microprocessor runs accurate algorithm draws particle size and number to this signal analysis, is converted into particulate matter metric density and exports with numeral after calibration.Microprocessor uses high-speed AD acquisition module acquires.Microprocessor is analyzed the AD signal gathered, the number of distinguishing particles thing signal pulse and height, and the quantity of corresponding particle and size obtain corresponding mass density data after reference instrument calibration, with after export through data output device 93.
In order to increase the accuracy of measurement result, in described generating laser 5, built-in lens is set, laser is carried out focusing on signal intensity when strengthening particle reflection, use laser focusing as light source, the signal of light beam after the reflection of very small particle still can be detected, and this has just widened the scope measuring grain diameter greatly.
Further, described data output device 93 is serial ports output or pwm signal output.The serial ports that serial ports exports is easy to connect, and plug is relatively simple and easy, and equipment connection is single, there is not interference each other, is convenient to investigation when going wrong; Pwm signal exports flexibly and dynamic response, the convenient observation of output waveform.
Observe testing result for the convenience of the users, described data output device 93 arranges display.
In order to shield the impact of outer bound pair amplifying circuit, described filtering and amplifying circuit 8 arranges radome 81, described radome 81 arranges earthing device 82, solve laser instrument and be subject to interference problem, rugged surroundings repellence is strengthened.
In order to shield extraneous electromagnetism to the interference of measurement result, described sensor housing 1 arranges plating.
Embodiment:
Embodiment 1:
A kind of dust detecting sensor based on LASER Light Source, comprise sensor housing 1, described sensor housing 1 is coated with plating, described sensor housing 1 is arranged power supply 2, air intake 11 and air out 12, power supply 2 provides power for whole device, air is entered by air intake 11, then leaves sensor by air out 12, forms an air sampling passage.Described air out 12 place provided with fan 3, accelerates air flowing, and what guarantee sampled air was quick, smooth passes through air sampling passage.Circuit board, measuring chamber 4, generating laser 5 are set in described sensor housing 1, described circuit board are arranged power supply 2, in described generating laser 5, built-in lens is set.Described measuring chamber 4 is communicated with air intake 11, air out 12 respectively, and special air sampling makes sampled air stable by measuring chamber 4, makes to measure response rapidly.Described measuring chamber 4 arranges opening 41, described opening 41 place arranges path channels 6, described path channels 6 one end is connected with measuring chamber 4, and the other end is connected with generating laser 5, carries out optically focused to laser, make dust by reflective light intensity during measuring chamber 4, thus acquisition clear signal, enlarge measurement range, increases and measures Numerical accuracy, to detect the concentration of the molecule in air accurately, the accuracy of measurement result and confidence level are improved greatly.Photelectric receiver 7, filtering and amplifying circuit 8 and microprocessor is set gradually along signal transfer direction in described measuring chamber 4.Described filtering and amplifying circuit 8 arranges radome 81, described radome 81 arranges earthing device 82.Setting data harvester 91, data processing equipment 92, serial data output unit 93 and memory storage on described microprocessor, harvester adopts high-speed AD acquisition device, microprocessor is analyzed the AD signal gathered, the number of distinguishing particles thing signal pulse and height, the quantity of corresponding particle and size, after reference instrument calibration, obtain corresponding mass density data, with after export through data output device 93.Described fan 3, photelectric receiver 7, generating laser 5 and microprocessor are all electrically connected with power supply 2.The beneficial effect of the present embodiment is: arrange built-in lens in generating laser 5, carries out focusing on signal intensity when strengthening particle reflection, increase the accuracy of measurement result to laser; When generating laser 5 power drop causes laser intensity to decline, information is passed to microprocessor by photelectric receiver 7, declines and does corresponding compensation, ensure measurement data accuracy, increase the service time of sensor the light intensity caused by decaying; Radome 81 and earthing device 82 are set, shield the impact of outer bound pair amplifying circuit, solve laser instrument and be subject to interference problem, rugged surroundings repellence is strengthened; Sensor outer housing arranges plating, makes the electromagnetic interference (EMI) in the grounded shield external world after housings conductive; The serial ports that serial ports exports is easy to connect, and plug is relatively simple and easy, and equipment connection is single, there is not interference each other, is convenient to investigation when going wrong.
Embodiment 2:
A kind of dust detecting sensor based on LASER Light Source, comprise sensor housing 1, described sensor housing 1 is coated with plating, described sensor housing 1 is arranged power supply 2, air intake 11 and air out 12, power supply 2 provides power for whole device, air is entered by air intake 11, then leaves sensor by air out 12, forms an air sampling passage.Described air out 12 place provided with fan 3, accelerates air flowing, and what guarantee sampled air was quick, smooth passes through air sampling passage.Circuit board, measuring chamber 4, generating laser 5 are set in described sensor housing 1, described circuit board is arranged power supply 2, described measuring chamber 4 is communicated with air intake 11, air out 12 respectively, and special air sampling makes sampled air stable by measuring chamber 4, makes to measure response rapidly.Described measuring chamber 4 arranges opening 41, described opening 41 place arranges path channels 6, described path channels 6 one end is connected with measuring chamber 4, and the other end is connected with generating laser 5, carries out optically focused to laser, make dust by reflective light intensity during measuring chamber 4, thus acquisition clear signal, enlarge measurement range, increases and measures Numerical accuracy, to detect the concentration of the molecule in air accurately, the accuracy of measurement result and confidence level are improved greatly.Photelectric receiver 7 is set gradually along signal transfer direction in described measuring chamber 4, filtering and amplifying circuit 8 and microprocessor, described radome 81 is arranged setting data harvester 91 on microprocessor described in earthing device 82, data processing equipment 92, pwm signal data output device 93 and memory storage, harvester adopts high-speed AD acquisition device, microprocessor is analyzed the AD signal gathered, the method that this programme uses two AD to gather increases the range of sensor measurement, when using single channel to gather measuring-signal, when signal height can saturatedly make range not increase to a certain extent again, this programme uses two AD collection to increase range to obtain final numerical value according to the weight of two collections after different acquisition speed and collection period collection signal.The number of distinguishing particles thing signal pulse and height, the quantity of corresponding particle and size, obtain corresponding mass density data after reference instrument calibration, with after export through data output device 93.Described data output device 93 arranges display.Described fan 3, photelectric receiver 7, generating laser 5 and microprocessor are all electrically connected with power supply 2.The beneficial effect of the present embodiment is: data output device 93 arranges display, and person easy to use observes testing result; Pwm signal exports flexibly and dynamic response, the convenient observation of output waveform; Radome 81 and earthing device 82 are set, shield the impact of outer bound pair amplifying circuit, solve laser instrument and be subject to interference problem, rugged surroundings repellence is strengthened; Sensor outer housing arranges plating, makes the electromagnetic interference (EMI) in the grounded shield external world after housings conductive.
Claims (6)
1. the dust detecting sensor based on LASER Light Source, comprise sensor housing (1), it is characterized in that: described sensor housing (1) is arranged air intake (11) and air out (12), described air out (12) place provided with fan (3), described sensor housing arranges circuit board in (1), measuring chamber (4), generating laser (5), described circuit board is arranged power supply (2), described measuring chamber (4) respectively with air intake (31), air out (12) is communicated with, described measuring chamber (4) arranges opening (41), described opening (41) place arranges path channels (6), described path channels (6) one end is connected with measuring chamber (4), the other end is connected with generating laser (5), photelectric receiver (7) is set gradually along signal transfer direction in described measuring chamber (4), filtering and amplifying circuit (8) and microprocessor, setting data harvester (91) on described microprocessor, data processing equipment (92), data output device (93) and memory storage, described fan (3), photelectric receiver (7), generating laser (5) and microprocessor are all electrically connected with power supply (2).
2. a kind of dust detecting sensor based on LASER Light Source according to claim 1, is characterized in that: described generating laser arranges built-in lens in (5).
3. a kind of dust detecting sensor based on LASER Light Source according to claim 1, is characterized in that: described data output device (93) exports for serial ports or pwm signal exports.
4. a kind of dust detecting sensor based on LASER Light Source according to claim 1 or 3, is characterized in that: (92) arrange display with described data output device.
5. a kind of dust detecting sensor based on LASER Light Source according to claim 1, it is characterized in that: described filtering and amplifying circuit (8) is arranged radome (81), described radome (81) is arranged earthing device (82).
6. a kind of dust detecting sensor based on LASER Light Source according to claim 1, is characterized in that: (1) arranges plating to described sensor housing.
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| CN201520362225.1U CN204613066U (en) | 2015-05-29 | 2015-05-29 | A kind of dust detecting sensor based on LASER Light Source |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105572008A (en) * | 2016-03-03 | 2016-05-11 | 张银虎 | Laser dust sensor |
| CN105628569A (en) * | 2015-12-24 | 2016-06-01 | 惠州华阳通用电子有限公司 | Control method and device for PM2.5 sensor |
| CN106680171A (en) * | 2017-03-07 | 2017-05-17 | 济南诺方电子技术有限公司 | Rainproof cover of dust sensor |
| CN106680168A (en) * | 2017-02-20 | 2017-05-17 | 常熟市顺欣仪器仪表有限公司 | Dust concentration measuring device |
| CN106680169A (en) * | 2017-02-20 | 2017-05-17 | 常熟市顺欣仪器仪表有限公司 | Dust concentration measuring device |
| CN107036946A (en) * | 2017-04-28 | 2017-08-11 | 江苏大学 | Solid particulate matter concentration detection apparatus under a kind of high humidity environment |
| CN107764708A (en) * | 2017-11-24 | 2018-03-06 | 武汉市普瑞思高科技有限公司 | A kind of vehicle-mounted laser PM2.5 sensors |
| CN107991210A (en) * | 2017-11-24 | 2018-05-04 | 深圳市昂茂科技有限公司 | Sensor |
| CN108398363A (en) * | 2017-02-06 | 2018-08-14 | 霍尼韦尔国际公司 | Particulate matter detection sensor with the new switching mechanism for forming air stream |
| CN108562525A (en) * | 2018-06-15 | 2018-09-21 | 古盼 | Air detecting device |
| CN108613907A (en) * | 2018-07-04 | 2018-10-02 | 汉王科技股份有限公司 | Particulate matter detection means |
| US10094776B2 (en) | 2016-07-18 | 2018-10-09 | Honeywell International Inc. | Dust sensor with mass separation fluid channels and fan control |
| CN109596488A (en) * | 2018-11-29 | 2019-04-09 | 海拉（厦门）电气有限公司 | A kind of novel laser PM2.5 dust sensor |
| CN109596489A (en) * | 2018-11-29 | 2019-04-09 | 海拉（厦门）电气有限公司 | A kind of laser PM2.5 dust sensor of automatic focusing |
| PL425210A1 (en) * | 2018-04-12 | 2019-10-21 | Główny Instytut Górnictwa | Laser optical dust meter |
| PL425211A1 (en) * | 2018-04-12 | 2019-10-21 | Główny Instytut Górnictwa | Optical dust meter casing |
| CN117147399A (en) * | 2023-11-01 | 2023-12-01 | 成都派斯光科技有限公司 | Particulate matter concentration measuring device and method |
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- 2015-05-29 CN CN201520362225.1U patent/CN204613066U/en active Active
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628569A (en) * | 2015-12-24 | 2016-06-01 | 惠州华阳通用电子有限公司 | Control method and device for PM2.5 sensor |
| CN105572008A (en) * | 2016-03-03 | 2016-05-11 | 张银虎 | Laser dust sensor |
| US10094776B2 (en) | 2016-07-18 | 2018-10-09 | Honeywell International Inc. | Dust sensor with mass separation fluid channels and fan control |
| CN108398363A (en) * | 2017-02-06 | 2018-08-14 | 霍尼韦尔国际公司 | Particulate matter detection sensor with the new switching mechanism for forming air stream |
| CN106680168B (en) * | 2017-02-20 | 2023-10-27 | 常熟市顺欣仪器仪表有限公司 | Dust concentration measuring device |
| CN106680168A (en) * | 2017-02-20 | 2017-05-17 | 常熟市顺欣仪器仪表有限公司 | Dust concentration measuring device |
| CN106680169A (en) * | 2017-02-20 | 2017-05-17 | 常熟市顺欣仪器仪表有限公司 | Dust concentration measuring device |
| CN106680169B (en) * | 2017-02-20 | 2023-10-27 | 常熟市顺欣仪器仪表有限公司 | Dust concentration measuring device |
| CN106680171A (en) * | 2017-03-07 | 2017-05-17 | 济南诺方电子技术有限公司 | Rainproof cover of dust sensor |
| CN107036946A (en) * | 2017-04-28 | 2017-08-11 | 江苏大学 | Solid particulate matter concentration detection apparatus under a kind of high humidity environment |
| CN107764708A (en) * | 2017-11-24 | 2018-03-06 | 武汉市普瑞思高科技有限公司 | A kind of vehicle-mounted laser PM2.5 sensors |
| CN107764708B (en) * | 2017-11-24 | 2024-01-02 | 武汉市普瑞思高科技有限公司 | Vehicle-mounted laser PM2.5 sensor |
| CN107991210A (en) * | 2017-11-24 | 2018-05-04 | 深圳市昂茂科技有限公司 | Sensor |
| PL425211A1 (en) * | 2018-04-12 | 2019-10-21 | Główny Instytut Górnictwa | Optical dust meter casing |
| PL425210A1 (en) * | 2018-04-12 | 2019-10-21 | Główny Instytut Górnictwa | Laser optical dust meter |
| CN108562525A (en) * | 2018-06-15 | 2018-09-21 | 古盼 | Air detecting device |
| CN108613907A (en) * | 2018-07-04 | 2018-10-02 | 汉王科技股份有限公司 | Particulate matter detection means |
| CN109596489A (en) * | 2018-11-29 | 2019-04-09 | 海拉（厦门）电气有限公司 | A kind of laser PM2.5 dust sensor of automatic focusing |
| CN109596488A (en) * | 2018-11-29 | 2019-04-09 | 海拉（厦门）电气有限公司 | A kind of novel laser PM2.5 dust sensor |
| CN117147399A (en) * | 2023-11-01 | 2023-12-01 | 成都派斯光科技有限公司 | Particulate matter concentration measuring device and method |
| CN117147399B (en) * | 2023-11-01 | 2024-01-26 | 成都派斯光科技有限公司 | Particulate matter concentration measuring device and method |
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Address after: 250002 C block 304, Wanshou Road 2, Shizhong District, Ji'nan, Shandong. Patentee after: Shandong Connaught Fang Electronic Technology Co., Ltd. Address before: Room 401, No. 13, Shanda South Road, Licheng District, Jinan City, Shandong Province Patentee before: Nova Fitness Co., Ltd. |
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