CN202661356U - Instrument for monitoring tiny particulate matters in air - Google Patents
Instrument for monitoring tiny particulate matters in air Download PDFInfo
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- CN202661356U CN202661356U CN 201220278328 CN201220278328U CN202661356U CN 202661356 U CN202661356 U CN 202661356U CN 201220278328 CN201220278328 CN 201220278328 CN 201220278328 U CN201220278328 U CN 201220278328U CN 202661356 U CN202661356 U CN 202661356U
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Abstract
The utility model discloses an instrument for monitoring tiny particulate matters in the air. The instrument for monitoring the tiny particulate matters in the air is used for monitoring particle properties of the tiny particulate matters in the air, a master circuit board is used to process and analyze obtained electric signals of the particle properties of the tiny particulate matters in the to-be-tested air, and therefore particle sizes of the tiny particulate matters in the air are estimated, and mass concentration and particle number concentration of the tiny particulate matters are analyzed. When the instrument for monitoring the tiny particulate matters in the air is used for measurement, clean dry air is fed to a main air channel to dilute the to-be-tested air, and therefore mutual influence of the tiny particulate matters due to overlap is avoided, and the signal-to-noise ratio of acquisition signals is improved; and in addition, the clean dry air is fed to a sensor, a protection circle is formed on the periphery of the to-be-tested air, and therefore a light source and other components in the sensor can be protected from being polluted by the to-be-tested air.
Description
Technical field
The utility model relates to a kind of optical instrument, is specifically related to a kind of air finely ground particles monitoring instrument.
Background technology
It is the main cause that causes haze weather that the particulates thing pollutes, and particularly PM2.5(is less than or equal to 2.5 micron particles things) pellet can impact the health of human body, mainly respiratory system and cardiovascular system are damaged.And the less harm to human body of particle diameter is larger.The monitoring of air finely ground particles is significant to administering environment and to protect mankind health.
The method of present domestic measurement air finely ground particles mainly contains: (1) filter membrane weight method, and this Method And Principle is simple, and dust proof rate is high, and measurement result is reliable, but need to manually weigh, and complex operation, time-consuming can not be realized automatic measurement; (2) β attenuation sensors, the method measuring system reliable operation, but discontinuous measurement, also but Automatic continuous is measured, but there is potential safety hazard in the method, requires the in-site measurement personnel to have higher quality, and system also needs to increase various shielding measures, the complicated structure of equipment generally is applicable to the occasion of special measurement requirement; (3) micro-oscillating balance method, the method are measured the particle of different-grain diameter scope by joining different cutters, measuring accuracy is high, and real-time is good, and for PM2.5, this method needs the higher accessory kit of precision, and measurement is subjected to the impact of temperature, humidity larger; (4) light scattering method, the method measuring speed is fast, good reproducibility, automaticity is high, can on-line continuous measure.
Light scattering method has been widely used in the monitoring of dust particle under the clean environment, and the technology comparative maturity.Utilize that finely ground particles communicates with the principle of dust particle in the measurement clean environment in the light scattering method monitoring atmosphere, both main difference points are: the concentration of dust particle often is not very high (the general monitoring range of private counter is at 350000/cubic metre) under the clean environment, and in the atmosphere concentration of pellet often greater than 350000/cubic metre.Because the concentration of tested pellet is larger in the atmosphere, when adopting the light scattering method monitoring, particle and particle overlap easily, influence each other, and cause the signal to noise ratio (S/N ratio) of the signal that collects lower.
Summary of the invention
The purpose of this utility model provides a kind of instrument that utilizes light scattering to monitor air finely ground particles particulate character, particularly to particle diameter less than or equal to the particle (PM1) of 1 μ m, particle diameter less than or equal to 2.5 μ m (PM2.5), the particle diameter monitoring less than or equal to 10 μ m (PM10), this instrument comes air to be measured is diluted by the gas that replenishes clean dried, it is overlapping to avoid that particle occurs, to improve the signal to noise ratio (S/N ratio) of the signal that gathers.
For achieving the above object, the technical solution adopted in the utility model is: a kind of air finely ground particles monitoring instrument comprises:
Can input the main gas circuit of air to be measured;
Be connected with described main gas circuit and can utilize light scattering principle to detect the sensor of the particulate character of described particulates thing to be measured;
Be arranged on the light signal that can collect the described particulates thing particulate character to be measured of reflection in the described sensor and the signal acquiring board that this light signal can be converted to electric signal output;
With the be electrically connected master control circuit plate of electric signal of the described particulates thing particulate character to be measured of reflection that can obtain the output of this signal acquiring board of described signal acquiring board;
Import is connected with described sensor can be to detecting the filter-paper filter that the air after finishing filters through this sensor, and described filter-paper filter has the filter paper that can change;
Import is connected with the outlet of described filter-paper filter can aspirate the sampling pump of air;
The discharge pipe that is connected with described sampling delivery side of pump;
Import is connected with described sampling delivery side of pump and can filters to obtain to the air of this sampling pump output the Filter dryer of clean dried gas;
With the be electrically connected temperature and humidity that can detect air to be measured in the described main gas circuit and can be with the temperature and humidity information output that the detects Temperature Humidity Sensor to described master control circuit plate of described master control circuit plate;
All be electrically connected with described master control circuit plate and all can be subjected to according to the humidity information of described Temperature Humidity Sensor output first flow operation valve and the second control valve of described master control circuit plate control aperture; the outlet of described Filter dryer is connected with described main gas circuit by described first flow operation valve; the outlet of described Filter dryer also is connected with an end of protection gas circuit; the other end of this protection gas circuit is connected with described sensor, and described second control valve is arranged in described protection gas circuit or the described discharge pipe.
During implementation; described Filter dryer comprises the first Filter dryer unit and the second Filter dryer unit that import all is connected with described sampling delivery side of pump; the outlet of described the first Filter dryer unit is connected with described main gas circuit by described first flow operation valve, and the outlet of described the second Filter dryer unit is connected with an end of described protection gas circuit.
Because the utilization of technique scheme, the utility model compared with prior art has following advantages: the utility model can be measured the particulate character of particulates thing, as the particle diameter of finely ground particles,Mass concentration and particle number concentrations.
In the air finely ground particles monitoring instrument; by in main gas circuit, passing into clean dry gas; air to be measured is diluted; avoided particle because overlapping causing influences each other; improve the signal to noise ratio (S/N ratio) of collection signal, in addition, in sensor, passed into clean drying gas; protect at the peripheral circle that forms of gas to be measured, the parts such as light source in the protection sensor are not by air pollution to be measured.
Description of drawings
Accompanying drawing 1 is synoptic diagram of the present utility model.
Embodiment
Further set forth structure of the present utility model below in conjunction with accompanying drawing.
Referring to shown in Figure 1; air finely ground particles monitoring instrument; comprise main gas circuit 13; sensor 1; be arranged on the signal acquiring board 2 in the sensor 1; filter-paper filter 3; sampling pump 5; discharge pipe 14; Filter dryer; master control circuit plate 8; first flow operation valve 6; second control valve 11; protection gas circuit 15; Temperature Humidity Sensor 12; be used for inputting air to be measured in the main gas circuit 13; sensor 1 is connected with main gas circuit 13; signal acquiring board 2 in the sensor 1 is electrically connected with master control circuit plate 8; the import of filter-paper filter 3 is connected with sensor 1; has the filter paper 4 that to change in the filter-paper filter 3; the outlet of filter-paper filter 3 is connected with the import of sampling pump 5; the outlet of sampling pump 5 is connected with discharge pipe 14; the outlet of sampling pump 5 also is connected with Filter dryer; in the present embodiment; this Filter dryer comprises the first Filter dryer unit 9 and the second Filter dryer unit 10 that import all is connected with the outlet of sampling pump 5; the outlet of the first Filter dryer unit 9 is connected with main gas circuit 13 by first flow operation valve 6; the outlet of the second Filter dryer unit 10 is connected with an end of protection gas circuit 15; the other end of protection gas circuit 15 is connected with sensor 1; protection gas circuit 15 is used for to sensor 1 input protection gas, and second control valve 11 is arranged in protection gas circuit 15 or the discharge pipe 14.Also be connected with Temperature Humidity Sensor 12 in the main gas circuit 13, Temperature Humidity Sensor 12 is electrically connected with master control circuit plate 8, Temperature Humidity Sensor 12 can detect the temperature and humidity of air to be measured in the main gas circuit 13, and can be with the temperature and humidity information output that detects to master control circuit plate 8, first flow operation valve 6, second control valve 11 all are electrically connected with master control circuit plate 8, and master control circuit plate 8 can be controlled according to the humidity information of Temperature Humidity Sensor 12 outputs the aperture of first flow operation valve 6 and second control valve 11.This air finely ground particles monitoring instrument is when work, bleed by sampling pump 5, sample gas (being air to be measured) is entered the sensor 1 from main gas circuit 13, sensor 1 can utilize light scattering principle to detect the particulate character of particulates thing to be measured, and the particulate character of utilizing light scattering principle to detect particulates thing to be measured is prior art.Signal acquiring board 2 in the sensor 1 can collect the light signal of reflection particulates thing particulate character to be measured, and this light signal can be converted to electric signal and export to master control circuit plate 8, master control circuit plate 8 is processed the electric signal that receives and analyze, thereby obtain the particulate character of finely ground particles, the particulate character of finely ground particles has comprised particle diameter, mass concentration and the population concentration of finely ground particles here.Filter by filter-paper filter 3 from sensor 1 air out, the particle diameter of the finely ground particles that contains in the air after the filtration is below the 2.5uM, filter paper 4 in the filter-paper filter 3 can be extracted out, in the result that filter paper 4 is weighed, analytical calculation obtains to containing finely ground particles, can be used for verifying in the master control circuit plate 8 by processing and the particulate character of analyzing the finely ground particles that obtains.In the present embodiment, analyze in the particulate character of the air finely ground particles that obtains by master control circuit plate 8, the gear of mass measurement: PM1, PM2.5, PM10, TSP (total value of all finely ground particles in the air to be measured), mass concentration scope: 0 ~ 1500 μ g/m
3
The gear that granule number is measured: 0.3 μ m, 0.5 μ m, 1 μ m, 3 μ m, 5 μ m, 10 μ m, particle number concentrations scope: 0 ~ 2x10
6
/ L.Air after filter-paper filter 3 filters is sent by sampling pump 5, in Fig. 1, the air that sampling pump 5 is sent can enter in the discharge pipe 14, by discharge pipe 14 dischargings, the flow of discharging is regulated by second control valve 11, the air that sampling pump 5 is sent can also enter the first Filter dryer unit 9 and the second Filter dryer unit 10, the first Filter dryer unit 9 and the second Filter dryer unit 10 not only can filter out airborne finely ground particles, can also remove moisture in air.Air can obtain the gas of clean dried after by the second Filter dryer unit 10; the gas of this clean dried enters in the sensor 1 by protection gas circuit 15; the periphery of the air to be measured in sensor 1 forms a circle protection, and the parts such as light source in the protection sensor 1 are not by air pollution to be measured.The clean dried gas that air obtains after by the first Filter dryer unit 9, enter in the main gas circuit 13 through 6 controls of first flow operation valve, when clean dried gas carries out drying to the air to be measured in the main gas circuit 13, also diluted air to be measured, avoid the overlapping of particulate in air to be measured, improved the signal to noise ratio (S/N ratio) of the signal of signal acquiring board collection.When the gas humidity of the Temperature Humidity Sensor 12 in the main gas circuit 13 in detecting main gas circuit 13 is higher, the valve opening of master control circuit plate 8 control first flow operation valves 6 strengthens, have more clean dried gas and enter main gas circuit 13, dry and dilution air to be measured; Otherwise when Temperature Humidity Sensor 12 detects gas humidity in the main gas circuit 13 when low, the valve opening of master control circuit plate 8 control first flow operation valves 6 reduces, and reduces entering the clean dried gas flow of main gas circuit 13.In Fig. 1, master control circuit plate 8 also can be controlled according to the humidity information that Temperature Humidity Sensor 12 detects the valve opening of second control valve 11, can play like this effect of regulating the clean dried gas flow in main gas circuit 13 and the protection gas circuit 15.
Claims (2)
1. an air finely ground particles monitoring instrument is characterized in that: comprise
Can input the main gas circuit of air to be measured;
Be connected with described main gas circuit and can utilize light scattering principle to detect the sensor of the particulate character of described particulates thing to be measured;
Be arranged on the light signal that can collect the described particulates thing particulate character to be measured of reflection in the described sensor and the signal acquiring board that this light signal can be converted to electric signal output;
With the be electrically connected master control circuit plate of electric signal of the described particulates thing particulate character to be measured of reflection that can obtain the output of this signal acquiring board of described signal acquiring board;
Import is connected with described sensor can be to detecting the filter-paper filter that the air after finishing filters through this sensor, and described filter-paper filter has the filter paper that can change;
Import is connected with the outlet of described filter-paper filter can aspirate the sampling pump of air;
The discharge pipe that is connected with described sampling delivery side of pump;
Import is connected with described sampling delivery side of pump and can filters to obtain to the air of this sampling pump output the Filter dryer of clean dried gas;
With the be electrically connected temperature and humidity that can detect air to be measured in the described main gas circuit and can be with the temperature and humidity information output that the detects Temperature Humidity Sensor to described master control circuit plate of described master control circuit plate;
All be electrically connected with described master control circuit plate and all can be subjected to according to the humidity information of described Temperature Humidity Sensor output first flow operation valve and the second control valve of described master control circuit plate control aperture; the outlet of described Filter dryer is connected with described main gas circuit by described first flow operation valve; the outlet of described Filter dryer also is connected with an end of protection gas circuit; the other end of this protection gas circuit is connected with described sensor, and described second control valve is arranged in described protection gas circuit or the described discharge pipe.
2. air finely ground particles monitoring instrument according to claim 1; it is characterized in that: described Filter dryer comprises the first Filter dryer unit and the second Filter dryer unit that import all is connected with described sampling delivery side of pump; the outlet of described the first Filter dryer unit is connected with described main gas circuit by described first flow operation valve, and the outlet of described the second Filter dryer unit is connected with an end of described protection gas circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220278328 CN202661356U (en) | 2012-06-14 | 2012-06-14 | Instrument for monitoring tiny particulate matters in air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220278328 CN202661356U (en) | 2012-06-14 | 2012-06-14 | Instrument for monitoring tiny particulate matters in air |
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| CN202661356U true CN202661356U (en) | 2013-01-09 |
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| CN 201220278328 Expired - Lifetime CN202661356U (en) | 2012-06-14 | 2012-06-14 | Instrument for monitoring tiny particulate matters in air |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706780A (en) * | 2012-06-14 | 2012-10-03 | 苏州苏净仪器自控设备有限公司 | Instrument for monitoring small particulate matters in air |
| CN103234881A (en) * | 2013-04-09 | 2013-08-07 | 安徽省安光环境光学工程技术研究中心有限公司 | Atmospheric particulate matter monitor |
| CN103940713A (en) * | 2014-04-24 | 2014-07-23 | 张利胜 | Haze particulate matter detecting device |
| CN104034571A (en) * | 2014-05-23 | 2014-09-10 | 上海大学 | Automatic diluting system for fed samples of single-particle aerosol mass spectrometer |
| CN107202749A (en) * | 2017-05-16 | 2017-09-26 | 西安科技大学 | Mine Dust granule density and grain diameter measurement system |
| CN107576601A (en) * | 2017-09-20 | 2018-01-12 | 张家港朗亿机电设备有限公司 | Suitable for the particulate matter on-line checking and analysis meter in urban track traffic place |
-
2012
- 2012-06-14 CN CN 201220278328 patent/CN202661356U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706780A (en) * | 2012-06-14 | 2012-10-03 | 苏州苏净仪器自控设备有限公司 | Instrument for monitoring small particulate matters in air |
| CN102706780B (en) * | 2012-06-14 | 2014-01-08 | 江苏苏净集团有限公司 | Instrument for monitoring small particulate matters in air |
| CN103234881A (en) * | 2013-04-09 | 2013-08-07 | 安徽省安光环境光学工程技术研究中心有限公司 | Atmospheric particulate matter monitor |
| CN103940713A (en) * | 2014-04-24 | 2014-07-23 | 张利胜 | Haze particulate matter detecting device |
| CN103940713B (en) * | 2014-04-24 | 2016-01-06 | 首都师范大学 | A kind of haze particle sniffer |
| CN104034571A (en) * | 2014-05-23 | 2014-09-10 | 上海大学 | Automatic diluting system for fed samples of single-particle aerosol mass spectrometer |
| CN104034571B (en) * | 2014-05-23 | 2017-01-04 | 上海大学 | A kind of individual particle aerosol mass spectrometer sample introduction automatic dilution system |
| CN107202749A (en) * | 2017-05-16 | 2017-09-26 | 西安科技大学 | Mine Dust granule density and grain diameter measurement system |
| CN107576601A (en) * | 2017-09-20 | 2018-01-12 | 张家港朗亿机电设备有限公司 | Suitable for the particulate matter on-line checking and analysis meter in urban track traffic place |
| CN107576601B (en) * | 2017-09-20 | 2023-11-17 | 张家港朗亿机电设备有限公司 | Particle on-line detection and analysis instrument suitable for urban rail transit places |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130109 Effective date of abandoning: 20140108 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130109 Effective date of abandoning: 20140108 |
|
| RGAV | Abandon patent right to avoid regrant |