WO2014005312A1 - Pm2.5 concentration detection system - Google Patents

Pm2.5 concentration detection system Download PDF

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Publication number
WO2014005312A1
WO2014005312A1 PCT/CN2012/078226 CN2012078226W WO2014005312A1 WO 2014005312 A1 WO2014005312 A1 WO 2014005312A1 CN 2012078226 W CN2012078226 W CN 2012078226W WO 2014005312 A1 WO2014005312 A1 WO 2014005312A1
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Prior art keywords
microcontroller
concentration
laser sensor
electrical signal
concentration detecting
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PCT/CN2012/078226
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French (fr)
Chinese (zh)
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佟峥
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深圳市赛纳威环境科技有限公司
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Priority to CN201290000324.XU priority Critical patent/CN203929618U/en
Priority to PCT/CN2012/078226 priority patent/WO2014005312A1/en
Publication of WO2014005312A1 publication Critical patent/WO2014005312A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/94—Investigating contamination, e.g. dust

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  • the invention belongs to the field of environmental detection, and in particular relates to a PM2.5 concentration detection system.
  • PM2.5 means diameter less than 2.5
  • the quality of micron solid particles in air per cubic meter is extremely harmful to the human body.
  • Real-time monitoring of PM2.5 values in the atmosphere can provide the most effective basis for air treatment.
  • the detection methods of PM2.5 in the atmosphere mainly include oscillatory balance method and Beta. Ray method, weighing method and light scattering method.
  • the oscillating balance method and the beta ray method can monitor the value of PM2.5 in real time, but Beta The ray method did not heat to remove water, the oscillating balance method went to the water, and also went to volatile organic compounds (VOC).
  • VOC volatile organic compounds
  • Weighing method can accurately measure PM2.5 in the atmosphere The value, but its accuracy is greatly affected by the PM2.5 cutter, sampler and precision balance, the operation is cumbersome and the PM2.5 value in the atmosphere cannot be displayed instantly.
  • the cost of light scattering dust meter is higher than that of oscillatory balance method and Beta
  • the ray method is lower.
  • the principle is to multiply the concentration of solid particles in the atmosphere measured by the light scattering method by a K value to convert into a mass concentration, K.
  • the value can be based on the concentration of the particulate matter in the sampled atmosphere, or it can be obtained by dividing the weight by the weighing, so the environmental change requires constant changes in the K value.
  • Figure 1 shows the conversion method for the traditional dust meter concentration - PM2.5 mass concentration.
  • Figure 1 It can be seen that the traditional conversion curve consists of multiple primary curves, which means that different conversion formulas need to be selected under different quantitative conditions, that is, different K needs to be selected according to environmental changes. The value (the slope of the primary curve) has a large influence on the detection efficiency, and the detection data may be inaccurate due to the limited empirical value.
  • the embodiment of the invention provides a PM2.5 concentration detection system, which aims to solve the traditional dust meter detection PM2.5
  • the low efficiency and poor accuracy make it difficult to accurately and efficiently measure in real time.
  • a PM2.5 concentration detecting system includes:
  • a laser sensor connected to the air pump for detecting dust particles in the air to be tested and converting the same into an electrical signal
  • An operational amplifier coupled to the laser sensor to amplify the electrical signal
  • a microcontroller connected to the operational amplifier, analyzing, correcting, and converting the amplified electrical signal according to a curve parameter obtained by the test;
  • a display connected to the microcontroller for displaying an output of the microcontroller
  • a power supply system that supplies power to the system.
  • the micro-controller analyzes, corrects and converts the quantity concentration detected by the laser sensor into a mass concentration, thereby realizing PM2.5. Accurate, efficient real-time measurement of concentration.
  • Figure 1 is a schematic diagram showing a conversion curve of the concentration of the dust meter - PM2.5 mass concentration in the prior art
  • FIG. 2 is a structural diagram of a PM2.5 concentration detecting system according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram showing a conversion curve of a quantity concentration - PM2.5 mass concentration provided by an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a humidity correction curve provided by an embodiment of the present invention.
  • FIG. 2 shows a PM2.5 provided by an embodiment of the present invention.
  • the implementation principle of the concentration detection system for the convenience of description, only the parts related to the embodiment of the present invention are shown.
  • the PM2.5 concentration detection system mainly includes an air pump 11 , a laser sensor 12 , an operational amplifier 13 , and a microcontroller 14 and display 15 .
  • the air pump 11 is connected to the laser sensor 12.
  • the laser sensor 12 is connected to the operational amplifier 13.
  • the operational amplifier 13 is connected to the microcontroller 14.
  • the microcontroller 14 is connected to the display 15.
  • the air pump 11, the laser sensor 12, the operational amplifier 13, and the microcontroller 14 are all powered by the power system.
  • the air pump 11 extracts the gas to be detected for detection by the laser sensor 12, and the laser sensor 12
  • the detected dust particles are converted into weak electrical signals, which are sent to an operational amplifier 13 to amplify the electrical signals, and the microcontroller 14
  • the amplified electric signal is analyzed, corrected and converted to obtain the mass concentration and the conversion result is displayed by the display screen 15, so that the PM2.5 in the air can be accurately and efficiently monitored in real time. Concentration.
  • the laser sensor 12 can have a particle size greater than 0.3 microns and less than 2.5. Micron solid particles are accurately counted.
  • Operational Amplifier 13 It should have the characteristics of high precision, low noise, low temperature drift, etc., to reduce the interference from the external environment during the process of amplifying the weak electrical signal, and reduce the error caused by the system itself.
  • the PM2.5 concentration detecting system is further provided with a button 16 and a system time unit 17 Auxiliary functions such as the measured ambient temperature/humidity detection unit 18, data storage unit 19, data transmission interface 20, and print interface 21.
  • Button 16 is used to receive external operating commands from the system.
  • the system time unit 17 provides a time base for the system.
  • the ambient temperature and humidity detection unit 18 can provide the system with the temperature and humidity of the current measured environment in real time, so that the system can PM2.5 The concentration detection result is corrected.
  • the data storage unit 19 can store the detected PM2.5 data.
  • the data transmission interface 20 can conveniently transmit the detected PM2.5 data to other devices, and can adopt USB. Interface.
  • Print Interface 21 Connect the system to the printer to print out the detected data, using the RS232 interface.
  • the system's power supply system includes two parts: lithium battery management and motherboard power distribution.
  • the input mains can be converted by a power adapter
  • the DC voltage of the DC9V/1A (two batteries in series, DC5V/1.5A for a single battery) is charged by the charging circuit 23.
  • a quantity concentration - PM2.5 is obtained through a large number of tests.
  • the mass concentration conversion curve and a humidity correction curve are set and the parameters of the two curves are set inside the micro control unit 14.
  • the air to be tested is extracted by the air pump 11, and the laser sensor 12
  • the dust particles in the air to be tested are detected and converted into weak electrical signals, and the operational amplifier 13 amplifies the electrical signals, and the microcontroller 14
  • the amplified electrical signals are analyzed, corrected and converted.
  • the conversion results are displayed on the display screen 15, so that the PM2.5 in the air can be accurately and efficiently monitored in real time. .
  • Figure 3 shows the quantitative concentration obtained by a large number of experiments in the embodiment of the present invention - PM2.5 Mass concentration conversion curve, which is a quadratic curve passing through the origin.
  • PM2.5 Mass concentration conversion curve which is a quadratic curve passing through the origin.
  • the rate of PM2.5 rise should be faster and faster as the concentration increases.
  • Figure 4 shows the humidity correction curve obtained by a large number of tests.
  • the humidity is getting higher and higher, there will be more and more less than 0.3.
  • Micron solid particles are coated with water droplets and become particles with a particle size larger than 0.3 microns. Therefore, the higher the humidity, the larger the correction factor and the more the concentration decreases.
  • the micro-controller analyzes, corrects and converts the quantity concentration detected by the laser sensor into a mass concentration, thereby realizing PM2.5. Accurate, efficient real-time measurement of concentration.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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  • Pathology (AREA)
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Abstract

A PM2.5 concentration detection system, comprising: an air pump (11) used for extracting air to be detected; a laser sensor (12) connected to the air pump (11) and used for detecting dust particles in the air to be detected and converting same into an electrical signal; an operation amplifier (13) connected to the laser sensor (12) and used for amplifying the electrical signal; a microcontroller (14) connected to the operation amplifier (13) and used for analysing, correcting and converting the amplified electrical signal according to a curve parameter obtained by a test; a display screen (15) connected to the microcontroller (14) and used for displaying the output result of the microcontroller (14); and a power supply system for supplying power for the system. The present invention is applicable to the field of environmental detection, and accurately and efficiently measures the PM2.5 concentration in real time by analysing and correcting the number concentration obtained by the detection of the laser sensor and converting same into the mass concentration using a microcontroller (14).

Description

一种 PM2.5 浓度检测***  PM2.5 concentration detection system 技术领域Technical field
本发明属于环境检测领域，尤其涉及一种 PM2.5 浓度检测***。  The invention belongs to the field of environmental detection, and in particular relates to a PM2.5 concentration detection system.
背景技术Background technique
PM2.5 是指直径小于 2.5 微米的固体颗粒物在每立方米空气中的质量，其对人体的危害极大，实时监测大气中的 PM2.5 数值可以为空气治理提供最有效的根据。 PM2.5 means diameter less than 2.5 The quality of micron solid particles in air per cubic meter is extremely harmful to the human body. Real-time monitoring of PM2.5 values in the atmosphere can provide the most effective basis for air treatment.
目前，大气中 PM2.5 的检测方法主要有振荡天平法、 Beta 射线法、称重法和光散射法粉尘仪测量法。其中，振荡天平法和 Beta 射线法可以实时监测 PM2.5 的数值，但是 Beta 射线法没有加热去水份，振荡天平法去了水份，也去了挥发性有机物（ VOC ），所有越是潮湿这两种方法越不准，加上仪器本身造价昂贵，维护成本高，所以很难大规模推广使用。称重法可以比较准确的测量出大气中的 PM2.5 数值，但它的准确度受 PM2.5 切割器、采样器和精密天平影响较大，操作比较繁琐且不能即时显示出大气中的 PM2.5 数值。 At present, the detection methods of PM2.5 in the atmosphere mainly include oscillatory balance method and Beta. Ray method, weighing method and light scattering method. Among them, the oscillating balance method and the beta ray method can monitor the value of PM2.5 in real time, but Beta The ray method did not heat to remove water, the oscillating balance method went to the water, and also went to volatile organic compounds (VOC). The more inconspicuous the two methods are, the more expensive the instrument itself is and the higher the maintenance cost, so it is difficult to promote it on a large scale. Weighing method can accurately measure PM2.5 in the atmosphere The value, but its accuracy is greatly affected by the PM2.5 cutter, sampler and precision balance, the operation is cumbersome and the PM2.5 value in the atmosphere cannot be displayed instantly.
光散射法粉尘仪的成本较振荡天平法和 Beta 射线法要低一些，原理是将光散射法测量出的大气中固体颗粒物的数量浓度乘以一个 K 值换算成质量浓度， K 值可以根据采样大气环境的颗粒物浓度高低采用经验数值，也可以通过采用称重后除以数量浓度取得，所以环境变化就需要不断地改变 K 值。 The cost of light scattering dust meter is higher than that of oscillatory balance method and Beta The ray method is lower. The principle is to multiply the concentration of solid particles in the atmosphere measured by the light scattering method by a K value to convert into a mass concentration, K. The value can be based on the concentration of the particulate matter in the sampled atmosphere, or it can be obtained by dividing the weight by the weighing, so the environmental change requires constant changes in the K value.
图 1 所示为传统的粉尘仪数量浓度 -PM2.5 质量浓度的转换方法。由图 1 可见传统的转换曲线由多条一次曲线组成，说明在不同数量浓度条件下需要选择不同的转换公式，即随环境变化需要选择不同的 K 值（一次曲线的斜率），对检测效率影响较大，且可能因为经验数值有限造成检测数据不准。 Figure 1 shows the conversion method for the traditional dust meter concentration - PM2.5 mass concentration. Figure 1 It can be seen that the traditional conversion curve consists of multiple primary curves, which means that different conversion formulas need to be selected under different quantitative conditions, that is, different K needs to be selected according to environmental changes. The value (the slope of the primary curve) has a large influence on the detection efficiency, and the detection data may be inaccurate due to the limited empirical value.
技术问题technical problem
本发明实施例提供一种 PM2.5 浓度检测***，旨在解决 传统的粉尘仪检测 PM2.5 的效率低、精度差，很难准确、高效地实时测量 的问题。  The embodiment of the invention provides a PM2.5 concentration detection system, which aims to solve the traditional dust meter detection PM2.5 The low efficiency and poor accuracy make it difficult to accurately and efficiently measure in real time.
技术解决方案Technical solution
本发明实施例是这样实现的，一种 PM2.5 浓度检测***，包括： The embodiment of the present invention is implemented in this manner, and a PM2.5 concentration detecting system includes:
气泵，用于抽取待测空气； An air pump for extracting air to be tested;
激光传感器，与所述气泵连接，用于检测待测空气中尘埃粒子，并将其转化成电信号； a laser sensor connected to the air pump for detecting dust particles in the air to be tested and converting the same into an electrical signal;
运算放大器，与所述激光传感器连接，将所述电信号放大； An operational amplifier coupled to the laser sensor to amplify the electrical signal;
微控制器，与所述运算放大器连接，根据试验获取的曲线参数对放大后的电信号进行分析、修正和换算； a microcontroller, connected to the operational amplifier, analyzing, correcting, and converting the amplified electrical signal according to a curve parameter obtained by the test;
显示屏，与所述微控制器连接，用于显示所述微控制器的输出结果；以及 a display connected to the microcontroller for displaying an output of the microcontroller;
为***供电的供电***。 A power supply system that supplies power to the system.
有益效果Beneficial effect
本发明实施例根据通过大量试验获得的经验数据，利用微控制器对激光传感器检测得到的数量浓度进行分析、修正并转换成质量浓度，实现了 PM2.5 浓度的准确、高效的实时测量。 According to the empirical data obtained through a large number of experiments, the micro-controller analyzes, corrects and converts the quantity concentration detected by the laser sensor into a mass concentration, thereby realizing PM2.5. Accurate, efficient real-time measurement of concentration.
附图说明DRAWINGS
图 1 是现有技术中粉尘仪数量浓度 -PM2.5 质量浓度的转换曲线示意图； Figure 1 is a schematic diagram showing a conversion curve of the concentration of the dust meter - PM2.5 mass concentration in the prior art;
图 2 是本发明 实施例提供的 PM2.5 浓度检测***的结构图； 2 is a structural diagram of a PM2.5 concentration detecting system according to an embodiment of the present invention;
图 3 是本发明 实施例提供的 数量浓度 -PM2.5 质量浓度的转换曲线示意图； 3 is a schematic diagram showing a conversion curve of a quantity concentration - PM2.5 mass concentration provided by an embodiment of the present invention;
图 4 是本发明 实施例提供的 湿度修正曲线示意图。 4 is a schematic diagram of a humidity correction curve provided by an embodiment of the present invention.
本发明的实施方式Embodiments of the invention
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。 The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
图 2 示出了本发明实施例提供的 PM2.5 浓度检测***的实现原理，为了便于说明，仅示出了与本发明实施例相关的部分。 FIG. 2 shows a PM2.5 provided by an embodiment of the present invention. The implementation principle of the concentration detection system, for the convenience of description, only the parts related to the embodiment of the present invention are shown.
该 PM2.5 浓度检测***主要包括气泵 11 、激光传感器 12 、运算放大器 13 、微控制器 14 和显示屏 15 。 The PM2.5 concentration detection system mainly includes an air pump 11 , a laser sensor 12 , an operational amplifier 13 , and a microcontroller 14 and display 15 .
气泵 11 与激光传感器 12 连接。 The air pump 11 is connected to the laser sensor 12.
激光传感器 12 与运算放大器 13 连接。 The laser sensor 12 is connected to the operational amplifier 13.
运算放大器 13 与微控制器 14 连接。 The operational amplifier 13 is connected to the microcontroller 14.
微控制器 14 与显示屏 15 连接。 The microcontroller 14 is connected to the display 15.
气泵 11 、激光传感器 12 、运算放大器 13 、微控制器 14 均由电源***进行供电。 The air pump 11, the laser sensor 12, the operational amplifier 13, and the microcontroller 14 are all powered by the power system.
在正常的测量模式下，气泵 11 抽取待检测气体供激光传感器 12 检测，激光传感器 12 检测到的尘埃粒子并将其转换为微弱的电信号，送入运算放大器 13 中将该电信号进行放大，微控制器 14 根据试验获取的曲线参数对放大后的电信号进行分析、修正和换算，得出质量浓度并利用显示屏 15 显示换算的结果，由此可以准确、高效地实时监测空气中的 PM2.5 浓度。 In the normal measurement mode, the air pump 11 extracts the gas to be detected for detection by the laser sensor 12, and the laser sensor 12 The detected dust particles are converted into weak electrical signals, which are sent to an operational amplifier 13 to amplify the electrical signals, and the microcontroller 14 According to the curve parameters obtained by the experiment, the amplified electric signal is analyzed, corrected and converted to obtain the mass concentration and the conversion result is displayed by the display screen 15, so that the PM2.5 in the air can be accurately and efficiently monitored in real time. Concentration.
在本发明实施例中，激光传感器 12 可以对粒径大于 0.3 微米，小于 2.5 微米的固体颗粒物进行准确计数。 In an embodiment of the invention, the laser sensor 12 can have a particle size greater than 0.3 microns and less than 2.5. Micron solid particles are accurately counted.
运算放大器 13 应具有高精度、低噪声、低温漂等特性，以减小对微弱电信号进行放大的过程中受外界环境的干扰，降低***本身造成的误差。 Operational Amplifier 13 It should have the characteristics of high precision, low noise, low temperature drift, etc., to reduce the interference from the external environment during the process of amplifying the weak electrical signal, and reduce the error caused by the system itself.
作为本发明的一个优选实施例，该 PM2.5 浓度检测***还设置有按键 16 、***时间单元 17 、被测环境温 / 湿度检测单元 18 、数据存储单元 19 、数据传输接口 20 和打印接口 21 等辅助功能。 As a preferred embodiment of the present invention, the PM2.5 concentration detecting system is further provided with a button 16 and a system time unit 17 Auxiliary functions such as the measured ambient temperature/humidity detection unit 18, data storage unit 19, data transmission interface 20, and print interface 21.
按键 16 用于接收***的外部操作指令。 Button 16 is used to receive external operating commands from the system.
***时间单元 17 为***提供时间基准。 The system time unit 17 provides a time base for the system.
环境温湿度检测单元 18 可以为***实时提供当前被测环境的温度和湿度，以便***对 PM2.5 的浓度检测结果进行修正。 The ambient temperature and humidity detection unit 18 can provide the system with the temperature and humidity of the current measured environment in real time, so that the system can PM2.5 The concentration detection result is corrected.
数据存储单元 19 可以存储已检测得到的 PM2.5 数据。 The data storage unit 19 can store the detected PM2.5 data.
数据传输接口 20 可以方便将已检测得到的 PM2.5 数据传输给其他设备，可以采用 USB 接口。 The data transmission interface 20 can conveniently transmit the detected PM2.5 data to other devices, and can adopt USB. Interface.
打印接口 21 将***与打印机连接，以便将检测得到得数据打印出来，可以采用 RS232 接口。 Print Interface 21 Connect the system to the printer to print out the detected data, using the RS232 interface.
***的供电***包括锂电池管理和主板电源分配两个部分。通过一个电源适配器，可以将输入的市电转换得到 DC9V/1A （ 2 节电池串联，若是单节电池，则为 DC5V/1.5A ）的直流电压，通过充电电路 23 对锂电池 24 进行充电。 The system's power supply system includes two parts: lithium battery management and motherboard power distribution. The input mains can be converted by a power adapter The DC voltage of the DC9V/1A (two batteries in series, DC5V/1.5A for a single battery) is charged by the charging circuit 23.
锂电池存储的电能通过电源*** 25 进行电源分配，分别得到不同的电压和电流，以满足***各个部分的需要。 Lithium battery stored power through the power system 25 Power distribution is performed to obtain different voltages and currents to meet the needs of various parts of the system.
本发明实施例中，通过大量试验获得一条数量浓度 -PM2.5 质量浓度的转换曲线以及一条湿度修正曲线，并将这两条曲线的参数设置到微控制单元 14 内部。然后，由气泵 11 抽取待测空气，激光传感器 12 检测到待测空气中的尘埃粒子并将其转换为微弱的电信号，运算放大器 13 将该电信号进行放大，微控制器 14 根据两条曲线的参数以及当前环境对放大后的电信号进行分析、修正和换算，最后将换算结果通过显示屏 15 显示出来，从而实现准确、高效地实时监测空气中的 PM2.5 。 In the embodiment of the present invention, a quantity concentration - PM2.5 is obtained through a large number of tests. The mass concentration conversion curve and a humidity correction curve are set and the parameters of the two curves are set inside the micro control unit 14. Then, the air to be tested is extracted by the air pump 11, and the laser sensor 12 The dust particles in the air to be tested are detected and converted into weak electrical signals, and the operational amplifier 13 amplifies the electrical signals, and the microcontroller 14 According to the parameters of the two curves and the current environment, the amplified electrical signals are analyzed, corrected and converted. Finally, the conversion results are displayed on the display screen 15, so that the PM2.5 in the air can be accurately and efficiently monitored in real time. .
图 3 示出了本发明实施例通过大量的试验获得的数量浓度 -PM2.5 质量浓度转换曲线，该曲线为一条通过原点二次曲线。在该曲线中，由于数量浓度越来越高，会有越来越大比例的固体颗粒物被其它固体颗粒物挡住而没有被激光传感器 12 检测到，所以 PM2.5 的上升速度应该随数量浓度的上升而越来越快。 Figure 3 shows the quantitative concentration obtained by a large number of experiments in the embodiment of the present invention - PM2.5 Mass concentration conversion curve, which is a quadratic curve passing through the origin. In this curve, as the concentration is getting higher and higher, an increasing proportion of solid particles are blocked by other solid particles without being exposed to the laser sensor. Detected, so the rate of PM2.5 rise should be faster and faster as the concentration increases.
图 4 为通过大量试验获得的湿度修正曲线。当湿度越来越高时，会有越来越多的小于 0.3 微米的固体颗粒物裹上水滴外衣，变成粒径大于 0.3 微米的颗粒物，因此湿度越高，修正系数越大，数量浓度减少的越多。 Figure 4 shows the humidity correction curve obtained by a large number of tests. When the humidity is getting higher and higher, there will be more and more less than 0.3. Micron solid particles are coated with water droplets and become particles with a particle size larger than 0.3 microns. Therefore, the higher the humidity, the larger the correction factor and the more the concentration decreases.
本发明实施例根据通过大量试验获得的经验数据，利用微控制器对激光传感器检测得到的数量浓度进行分析、修正并转换成质量浓度，实现了 PM2.5 浓度的准确、高效的实时测量。 According to the empirical data obtained through a large number of experiments, the micro-controller analyzes, corrects and converts the quantity concentration detected by the laser sensor into a mass concentration, thereby realizing PM2.5. Accurate, efficient real-time measurement of concentration.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。 The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims (8)

  1. 一种 PM2.5 浓度检测***，其特征在于，所述***包括： A PM2.5 concentration detection system, characterized in that the system comprises:
    气泵，用于抽取待测空气；An air pump for extracting air to be tested;
    激光传感器，与所述气泵连接，用于检测待测空气中尘埃粒子，并将其转化成电信号；a laser sensor connected to the air pump for detecting dust particles in the air to be tested and converting the same into an electrical signal;
    运算放大器，与所述激光传感器连接，将所述电信号放大；An operational amplifier coupled to the laser sensor to amplify the electrical signal;
    微控制器，与所述运算放大器连接，根据试验获取的曲线参数对放大后的电信号进行分析、修正和换算；a microcontroller, connected to the operational amplifier, analyzing, correcting, and converting the amplified electrical signal according to a curve parameter obtained by the test;
    显示屏，与所述微控制器连接，用于显示所述微控制器的输出结果；以及a display connected to the microcontroller for displaying an output of the microcontroller;
    为***供电的供电***。A power supply system that supplies power to the system.
  2. 如权利要求 1 所述的 PM2.5 浓度检测*** ，其特征在于，所述***还包括：The PM2.5 concentration detecting system according to claim 1, wherein the system further comprises:
    与所述微控制器连接的按键。A button that is connected to the microcontroller.
  3. 如权利要求 1 所述的 PM2.5 浓度检测*** ，其特征在于，所述***还包括：The PM2.5 concentration detecting system according to claim 1, wherein the system further comprises:
    与所述微控制器连接的***时间单元。A system time unit connected to the microcontroller.
  4. 如权利要求 1 所述的 PM2.5 浓度检测*** ，其特征在于，所述***还包括：The PM2.5 concentration detecting system according to claim 1, wherein the system further comprises:
    环境温湿度检测单元，与所述微控制器连接，用于为所述微控制器实时提供当前被测环境的温度和湿度数据。An ambient temperature and humidity detecting unit is connected to the microcontroller for providing the microcontroller with temperature and humidity data of the current measured environment in real time.
  5. 如权利要求 1 所述的 PM2.5 浓度检测*** ，其特征在于，所述***还包括：The PM2.5 concentration detecting system according to claim 1, wherein the system further comprises:
    与所述微控制器连接的数据存储单元。A data storage unit coupled to the microcontroller.
  6. 如权利要求 1 所述的 PM2.5 浓度检测*** ，其特征在于，所述***还包括：The PM2.5 concentration detecting system according to claim 1, wherein the system further comprises:
    与所述微控制器连接的数据传输接口。A data transfer interface coupled to the microcontroller.
  7. 如权利要求 1 所述的 PM2.5 浓度检测*** ，其特征在于，所述***还包括：The PM2.5 concentration detecting system according to claim 1, wherein the system further comprises:
    与所述微控制器连接的打印接口。A print interface that is coupled to the microcontroller.
  8. 如权利要求 1 所述的 PM2.5 浓度检测*** ，其特征在于，所述曲线为一条数量浓度 -PM2.5 质量浓度的转换曲线，以及一条湿度修正曲线。The PM2.5 concentration detecting system according to claim 1, wherein said curve is a quantity concentration - PM2.5 Conversion curve for mass concentration and a humidity correction curve.
PCT/CN2012/078226 2012-07-05 2012-07-05 Pm2.5 concentration detection system WO2014005312A1 (en)

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CN104697909A (en) * 2014-10-29 2015-06-10 柴俊沙 Household intelligent PM (particulate matter) 2.5 detecting equipment
CN106680161A (en) * 2015-11-09 2017-05-17 无锡中衡环境科技有限公司 Flying dust particulate monitoring system
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CN106370570B (en) * 2016-08-25 2020-07-10 北京小米移动软件有限公司 Method and device for calibrating particulate matter measured value
CN107957386A (en) * 2017-12-21 2018-04-24 台州新立模塑科技股份有限公司 A kind of detection device applied to PM2.5 sensor producing lines
CN108287217A (en) * 2018-01-02 2018-07-17 北京金茂绿建科技有限公司 Indoor thermostat Detection of Air Quality method, electronic equipment and storage medium
CN108344673A (en) * 2018-03-27 2018-07-31 深圳市赛纳威环境科技有限公司 Detection terminal and air quality detection system

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