WO2016078217A1 - 多参数传感模块 - Google Patents

多参数传感模块 Download PDF

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Publication number
WO2016078217A1
WO2016078217A1 PCT/CN2015/071535 CN2015071535W WO2016078217A1 WO 2016078217 A1 WO2016078217 A1 WO 2016078217A1 CN 2015071535 W CN2015071535 W CN 2015071535W WO 2016078217 A1 WO2016078217 A1 WO 2016078217A1
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air
sensor
sensing module
parameter sensing
temperature
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PCT/CN2015/071535
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English (en)
French (fr)
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郗晓言
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北京中立格林控制技术有限公司
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Publication of WO2016078217A1 publication Critical patent/WO2016078217A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure, temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01W—METEOROLOGY
    • G01W1/00—Meteorology
    • G01W1/02—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed

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  • the present invention relates to sensor technology and, more particularly, to a multi-parameter sensing module that can simultaneously measure multiple air parameters in an environment and can compensate for environmental impact.
  • Air quality has a significant impact on human health, and airborne pollutants are a predisposing factor for many diseases.
  • the main harmful pollutants in indoor air include: fine particles (Particulate Matter 2.5, PM2.5) with a diameter of less than 2.5 microns and PM10 with a particle size of less than 10 microns, and Volatile Organic Compounds (VOC). )Wait.
  • PM2.5 and PM10 are the main components of today's smog pollutants.
  • VOC includes cigarette smoke, formaldehyde, toluene, ammonia, etc. released from construction and decoration materials, while indoor carbon dioxide CO2 concentration represents fresh air volume and ventilation level.
  • the detection parameters of various detection devices are single.
  • the detection equipment is affected by the working environment during measurement. Large, changes in the working environment will cause the test results to greatly deviate from the actual value, and even the test equipment can not work properly.
  • the present invention proposes a multi-parameter sensing module. Multiple parameters of the ambient air can be measured simultaneously and the impact of the environment on the measured values can be compensated.
  • the multi-parameter sensing module of the present invention comprises:
  • a housing having at least one air inlet and at least one air outlet;
  • a fan disposed at the air exhaust port for driving air to be discharged from the air exhaust port
  • a temperature and humidity sensor disposed at the air inlet for detecting an air temperature at the air inlet and Air humidity
  • a gas sensor module disposed in the air passage, including at least one gas sensor
  • a temperature sensor disposed in the air passage for detecting an air temperature at the gas sensor module
  • the gas sensor module is heated to an effective working temperature before the air enters the gas sensor module;
  • control unit disposed in the air passage, controlling opening and closing of the heating device, and performing offset compensation on the detected value of the particulate sensor according to the air humidity
  • the plurality of baffles are integrally formed with the housing to form a plenum structure for receiving the particulate matter sensor.
  • the plurality of partitions comprises:
  • a second partition disposed between the air intake port and the particulate matter sensor
  • the first separator and the second separator are connected to each other to surround the particulate matter sensor.
  • the particulate matter sensor is a laser scattering microparticle sensor that measures the concentration of PM2.5 and PM10 in the air;
  • control unit compensates for the PM2.5/PM10 detection value of the laser scattering microparticle sensor based on the following formula:
  • x is the detected value
  • y is the air humidity
  • Z is a compensated detected value
  • the housing includes air vents in two directions, respectively disposed on different sides of the housing, and the air vents are respectively provided with a detachable first air cover and a sealing cover, the first The air cover has a hole for air circulation, and the sealing cover is for closing the air exhaust port.
  • the housing includes air inlets in two directions, respectively disposed on different sides of the housing, and the air inlets are respectively provided with a detachable second air cover and a sealing cover, the second The air cover has a hole for air circulation or an interface for connecting the air pipe, the sealing cover for closing the air inlet.
  • the multi-parameter sensing module further includes:
  • An air pump is disposed outside the casing and connected to the air inlet;
  • the air dehumidification tube is disposed outside the casing and connected to the air pump.
  • the partition of the casing is integrally formed by aluminum casting.
  • control unit turns on the heating device when the air temperature at the gas sensor module is less than the first temperature threshold, and turns off after the air temperature at the gas sensor module is greater than the second temperature threshold and continues for the first time threshold Heating the device.
  • the temperature sensor is located at the tail of the air passage.
  • the multi-parameter sensing module of the present invention can provide a plurality of simultaneous air measurement parameters, and preheat the air in the air passage by a heating device in a low temperature environment, and the air is heated to an effective working temperature before entering the gas sensor module. Preventing the malfunction of the sensor and avoiding internal condensation; the multi-parameter sensing module of the present invention can compensate the detected value of the particulate sensor according to the air humidity; the multi-parameter sensing module of the present invention adopts a fully sealed cast aluminum structure to ensure The internal air-tightness and shielding of the module ensure that the laser has no external leakage and improve the ability to resist external interference.
  • FIG. 1 is a structural diagram of an embodiment of a multi-parameter sensing module of the present invention
  • Figure 2 is a schematic structural view of the housing of Figure 1;
  • 3a-3c are schematic views of a detachable second air cover and a sealing cover for an air intake port;
  • 4a-4b are schematic views of a detachable first air cover and a sealing cover for an air vent;
  • Figure 5 is a schematic illustration of another embodiment of a multi-parameter sensing module of the present invention.
  • the multi-parameter sensing module 10 includes a housing 101 , a first partition 102 , a second partition 103 , a first air inlet 104 a , a second air inlet 104 b , and a first air row.
  • the control unit 109 is connected to the temperature and humidity sensor 106, the particulate matter sensor 107, the heating device 108, the VOC sensor 110, the CO2 sensor 111, the temperature sensor 112, and the fan 113 via lines, which are not shown in FIG.
  • the housing 101 is for accommodating and supporting the first partition 102, the second partition 103, the temperature and humidity sensor 106, the particulate matter sensor 107, the control unit 109, the heating device 108, the CO2 sensor 111, the VOC sensor 110, the temperature sensor 112, and the fan. 113, to isolate these components from the outside world.
  • FIG. 2 is a schematic structural view of the casing 101.
  • the housing 101 includes a first housing 101a and a second housing 101b.
  • the first partition 102, the second partition 103, the temperature and humidity sensor 106, the particulate matter sensor 107, the control unit 109, the heating device 108, the CO2 sensor 111, the VOC sensor 110, the temperature sensor 112, and the fan 113 are all fixed and fixed.
  • the second housing 101b On the second housing 101b.
  • the first housing 101a and the second housing 101b are formed by die casting using an aluminum material.
  • the housing 101 is obtained by directly closing and reinforcing the first housing 101a and the second housing 101b.
  • the housing 101 has two air intake ports: a first air intake port 104a and a second air intake port 104b.
  • the first air intake port 104a is located at the side 1011 of the housing 101
  • the second air intake port 104b is located at the bottom surface of the housing 101.
  • the outside air enters the air passage inside the multi-parameter transmission module 10 through the air intake port.
  • the first air inlet 104a and the second air inlet 104b are respectively provided with a detachable second air cover and a sealing cover. When using, insert one of them directly into the slot of the air intake.
  • 3a-3c are schematic illustrations of a detachable second air cap, seal cap for an air intake. As shown in FIG.
  • the second air cover may be provided with a plurality of strip-shaped long hole vent holes in parallel, that is, the louver diffused type; in a preferred embodiment, the second air cover is as shown in FIG. 3b, and second.
  • the air cover is provided with an interface connecting the air pipe, that is, a pipeline type; the sealing cover is as shown in FIG. 3c, and is dense. The cover is used to close the air intake. For example, when the first air inlet 104a is inserted with the second air cover, the second air inlet 104b should be inserted with a sealing cover, that is, the second air inlet 104b is closed.
  • the first air inlet 104a should be inserted with a sealing cover.
  • the housing 101 has two air exhaust ports: a first air exhaust port 105a and a second air exhaust port 105b. Opposite the side 1011 of the housing 101 is the other side 1012 of the housing 101, the first air vent 105a is located on the side 1012 of the housing 101, and the second air vent 105b is located on the bottom surface of the housing 101.
  • the air in the air passage of the multi-parameter transmission module 10 is exhausted through the air exhaust port.
  • the first air exhaust port 105a and the second air exhaust port 105b are respectively provided with a detachable first air cover and a sealing cover. 4a-4b are schematic illustrations of a detachable first air cap, seal cap for an air vent. As shown in Fig.
  • the first air cover is provided with a plurality of strip-shaped long hole vent holes which are parallel to each other, that is, a louver type vent; as shown in Fig. 4b, the seal cover is used to close the air vent.
  • the position of the air exhaust port can be flexibly selected depending on the use environment and the mounting method.
  • the air inlet and air outlet of the multi-parameter sensing module 10 are designed in a number of different combinations of air inlet and outlet. Users can flexibly choose different air intake and air exhaust port position combinations and air intake air intake according to the installation environment and installation method of the application.
  • the first partition 102 is disposed at a central portion of the casing 101 and connected to the casing 101 and the second partition 103.
  • the first partition 102 separates the particulate matter sensor 107 from the control unit 109, the CO2 sensor 111, the VOC sensor 110, the temperature sensor 112, the fan 113, the first air exhaust port 105a, and the second air exhaust port 105b.
  • the second partition 103 is disposed between the first air inlet 104a, the second air inlet 104b, and the particulate matter sensor 107, and the second partition 103 is coupled to the casing 101 and the first partition 102.
  • the second partition 103 is used to separate the particulate matter sensor 107 from the first air inlet 104a and the second air inlet 104b, and the temperature and humidity sensor 106.
  • the first partition 102, the second partition 103 and the casing 101 together define a cavity surrounding the particulate matter sensor 107 as a gas chamber of the particulate matter sensor 107, which avoids interference of external light to the particulate matter sensor 107, It is also possible that the laser light generated by the particulate sensor 107 is not leaked.
  • the first separator 102, the second separator 103, and the casing 101 are all cast aluminum materials.
  • the first partition 102, the second partition 103, and the casing 101b are integrally formed and integrally formed by a mold.
  • the first partition 102, the second partition 103, and the housing 101 also collectively form an air passage inside the multi-parameter sensing module 10.
  • the air passage is led by an air intake port with an air exhaust port as a tail, and the air entering the air passage sequentially passes through the temperature and humidity sensor 106, the particulate matter sensor 107, the heating device 108, the control unit 109, the VOC sensor 110, and the CO2 sensor 111.
  • the temperature and humidity sensor 106 is disposed inside the casing 101 adjacent to the first air inlet 104a and the second air.
  • the air inlet 104b is for detecting the air temperature and the air humidity at the air inlet, and transmitting the air temperature and the air humidity at the air inlet to the control unit 109.
  • the particulate matter sensor 107 is located in a gas chamber surrounded by the first separator 102, the second separator 103, and the casing 101.
  • the particulate matter sensor 107 is a laser-scattering fine particle sensor for detecting the content of fine particles having a diameter of 2.5 ⁇ m or less and dust particles having a diameter of 10 ⁇ m or less in the air.
  • the particulate sensor 107 includes a laser emitter and a laser receiver.
  • the laser-scattering fine particle sensor transmits the concentration of the PM2.5 particles and the PM10 particles to the control unit 109, respectively, in real time.
  • the gas sensor module includes a CO2 sensor 111 and a VOC sensor 110.
  • the CO2 sensor 111 is for detecting the CO 2 concentration in the air and transmitting the detected CO 2 concentration to the control unit 109.
  • the VOC sensor 110 is used to detect the concentration of volatile organic compounds in the air.
  • the volatile organic compounds described in this embodiment include formaldehyde, toluene, ammonia, cigarette smoke, alcohol, and the like.
  • the VOC sensor 110 transmits the detected VOC concentration to the control unit 109.
  • the heating device 108 is disposed in the air passage before the gas sensor module for heating the temperature of the air in the air passage.
  • the heating device 108 is turned on or off according to a command from the control unit 109.
  • the heating device 108 may be any device that uses electric energy to achieve a heating effect, such as electromagnetic heating, infrared heating, resistance heating, and the like.
  • the heating device 108 in this embodiment employs a resistance heating method.
  • the heating device 108 has a plurality of heating powers, and the selection of the heating power is controlled by the control unit 109.
  • the temperature sensor 112 is disposed adjacent to the first air exhaust port 105a and the second air exhaust port 105b for detecting the air temperature at the gas sensor module and transmitting the air temperature at the gas sensor module to the control unit 109.
  • the fan 113 is located in the casing 101, and the air passage tail portion of the multi-parameter transmission module 10 is provided for driving the air in the air passage of the multi-parameter transmission module 10 to be discharged through the air exhaust port.
  • the control unit 109 receives the CO2 concentration detected by the sensor, the VOC concentration, the PM2.5/PM10 concentration, the air humidity and air temperature at the air intake, and the air temperature at the gas sensor module.
  • the control unit 109 turns on the heating device 108 when the air temperature at the gas sensor module is below the first temperature threshold, and turns off the heating device 108 when the air temperature at the gas sensor module is greater than the second temperature threshold and continues to exceed the first time threshold.
  • the first temperature threshold is 0 degrees Celsius
  • the second temperature threshold is 10 degrees Celsius
  • the first threshold time is 10 seconds.
  • the control unit 109 also compensates for the PM2.5/PM10 concentration detection value of the particulate matter sensor 107 based on the air humidity at the air intake port.
  • the control unit 109 pairs the particulate sensor 107 based on the following formula
  • the PM2.5/PM10 concentration detection value is compensated:
  • x is the PM2.5/PM10 concentration detection value of the particulate matter sensor 107
  • y is the air humidity at the air inlet
  • Z is the compensated PM2.5/PM10 concentration value
  • the control unit 109 transmits the CO2 concentration, the VOC concentration, the compensated PM2.5/PM10 concentration, the air temperature at the air intake port, and the air humidity to the external receiving device.
  • FIG. 5 is a schematic illustration of another embodiment of a multi-parameter sensing module of the present invention.
  • the multi-parameter sensing module 10 of the present embodiment further includes an air dehumidification tube 115 and an air pump 114.
  • the casing 101 is identical to the previous embodiment, and the same position is provided with a first air inlet 104a and a second air inlet 104b.
  • the air dehumidification pipe 115 is connected to the air pump 114.
  • An air drying belt is installed in the air dehumidification pipe 115, and the surface of the air drying belt is coated with a chemical substance, which absorbs moisture in the air and is converted into other chemical components to volatilize.
  • the air drying belt reduces the humidity of the passing air to below 60% RH, thereby minimizing the deviation of the detected values of the CO2 sensor, the VOC sensor, and the particulate sensor caused by excessive humidity of the ambient air.
  • the air pump 114 connects the air dehumidification pipe 115 and the first air intake port 104a or the second air intake port 104b.
  • the air inlet connected to the air pump 114 uses a second air cover, and the other air inlet uses a sealing cover.
  • the air pump 114 is for driving air that has entered the intake port after passing through the air dehumidification pipe 115.
  • the multi-parameter sensing module of the invention can provide multiple air environment parameters at the same time, and heats the air through the internal heating device in a low temperature environment, and the air is heated and then enters the gas sensor, thereby preventing the sensor from failing, and Avoiding condensation inside the multi-parameter sensing module housing; the multi-parameter sensing module of the present invention improves the measurement accuracy of the CO2 sensor, the VOC sensor, and the laser microparticle sensor parameters by internal compensation and/or external dehumidification; the multi-parameter of the present invention
  • the sensor module adopts a fully enclosed cast aluminum structure to ensure the air-tightness and shielding of the module, ensuring no leakage of the laser and improving the ability to resist external interference.
  • the multi-parameter sensing module of the present invention provides a variety of air intake and air vent designs, and the user can flexibly select according to the use environment.

Abstract

一种多参数传感模块（10），所述的多参数传感模块（10）包括：壳体（101）、多个隔板（102、103）、风扇（113）、颗粒物传感器（107）、气体传感器模块（110、111）、温度传感器（112）、温湿度传感器（106）、加热器件（108）、控制单元（109）。其中所述的加热器件（108），在空气进入气体传感器模块（110、111）之前将空气加热至有效工作温度；所述的控制单元（109）根据空气湿度对所述颗粒物传感器（107）的检测值进行补偿以及控制所述的加热器件（108）的开启和关闭，使得多参数传感模块（10）在低温环境可以正常工作，防止传感器失效，避免多参数传感模块（10）内部结露。所述多个隔板（102、103）与所述壳体（101）采用全密闭铸造铝结构一体形成确保了模块内部的气闭性和屏蔽性，同时确保了激光无外漏，提高了抗干扰能力。

Description

多参数传感模块
本申请要求了2014年11月20日提交的、申请号为2014106705190、发明名称为“多参数传感模块”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及传感器技术，更具体地，涉及一种可以同时测量环境中多个空气参数并且能够补偿环境影响的多参数传感模块。
背景技术
空气质量对人的健康有很重要的影响，空气中的污染物是很多疾病的诱发因素。目前室内空气中对人体有害污染物的主要包括：直径小于2.5微米的细颗粒物(Particulate Matter 2.5，PM2.5)和直径小于10微米的粉尘颗粒物PM10，以及挥发性有机化合物(Volatile Organic Compounds，VOC)等。PM2.5和PM10是如今雾霾污染物的主要成分，VOC包括香烟烟雾，建筑及装修材料释放的甲醛、甲苯、氨气等，而室内二氧化碳CO2浓度代表着新风量及通风水平。因此能够随时随地检测周围环境的空气质量，根据检测结果调整室内活动、提高空气质量水平，对保持人体健康很有意义。然而目前一方面各种检测设备检测参数单一，用户需要测量多个参数时，需要采用多个不同的传感器或监测仪器，占用空间大成本昂贵；另一方面检测设备在测量时受工作环境影响较大，工作环境变化会造成检测结果大大偏离实际值，甚至检测设备不能正常工作。
发明内容
有鉴于此，本发明提出了一种多参数传感模块。可以同时测量环境空气的多个参数，并且能够补偿环境对测量值的影响。
本发明所述的多参数传感模块，包括：
壳体，具有至少一个空气进气口和至少一个空气排气口；
多个隔板，设置于所述空气进气口和空气排气口之间，用于形成气道或气室；
风扇，设置于所述空气排气口处，用于驱动空气从空气排气口排出；
温湿度传感器，设置于所述空气进气口处，用于检测空气进气口处的空气温度和 空气湿度；
颗粒物传感器；
气体传感器模块，设置于所述气道中，包括至少一种气体传感器；
温度传感器，设置于所述气道中，用于检测气体传感器模块处的空气温度；
加热器件，设置于所述气道中，所述的气体传感器模块之前，在空气进入气体传感器模块之前将空气加热至有效工作温度；
控制单元，设置于所述气道中，控制所述加热器件的开启和关闭，以及根据所述空气湿度对所述颗粒物传感器的检测值进行偏差补偿；
所述多个隔板与所述壳体一体形成，形成用于容纳所述颗粒物传感器的气室结构。
优选地，所述多个隔板包括：
第一隔板，设置于所述颗粒物传感器和所述气体传感器模块之间；
第二隔板，设置于所述空气进气口和所述颗粒物传感器之间；
所述第一隔板和第二隔板相互连接，包围所述颗粒物传感器。
优选地，所述颗粒物传感器为激光散射微小颗粒物传感器，测量空气中的PM2.5和PM10的浓度；
优选地，所述控制单元基于如下公式对所述激光散射微小颗粒物传感器的PM2.5/PM10检测值进行补偿：
Z＝(p1+p2*x+p3*x2+p4*y+p5*y2)/(1+p6*x+p7*y)
其中，x为所述检测值，y为所述空气湿度，Z为经补偿的检测值；
p1＝-97.3402743047253；p2＝6.12542455498836；
p3＝-0.0910880350446089；p4＝0.0131784988508396；
p5＝9.30928475757443E-8；p6＝-0.0199220178034449；
p7＝5.58069786921768E-5。
优选地，所述壳体包括两个方向的空气排气口，分别设置于壳体的不同侧面，所述空气排气口分别设置有可拆卸的第一空气盖和密封盖，所述第一空气盖具有可供空气流通的孔洞，所述密封盖用于关闭空气排气口。
优选地，所述壳体包括两个方向的空气进气口，分别设置于壳体的不同侧面，所述空气进气口分别设置有可拆卸的第二空气盖和密封盖，所述第二空气盖具有可供空气流通的孔洞或用于连接气管的接口，所述密封盖用于关闭空气进气口。
优选地，所述多参数传感模块还包括：
气泵，设置于壳体外，与所述空气进气口连接；
空气除湿管，设置于壳体外，与所述气泵连接。
优选地，所述壳体所述隔板采用铝铸造一体形成。
优选地，所述控制单元在气体传感器模块处的空气温度小于第一温度阈值时开启所述加热器件，在气体传感器模块处的空气温度大于第二温度阈值并且持续第一时间阈值后关闭所述加热器件。
优选地，所述温度传感器位于所述气道的尾部。
本发明的多参数传感模块可以提供同时多个空气测量参数，并且在低温环境下通过加热器件对气道中的空气进行加热预处理，空气被加热至有效工作温度后再进入气体传感器模块，可以防止传感器工作失效，并能避免内部结露；本发明的多参数传感模块能够根据空气湿度对所述颗粒物传感器的检测值进行补偿；本发明的多参数传感模块采用全密闭铸造铝结构确保了模块内部的气闭性和屏蔽性，确保激光无外漏，同时提高了抗外界干扰能力。
附图说明
通过以下参照附图对本发明实施例的描述，本发明的上述以及其它目的、特征和优点将更为清楚，在附图中：
图1为本发明的多参数传感模块实施例的结构图；
图2为图1中的壳体的结构示意图；
图3a-3c为用于空气进气口的可拆卸的第二空气盖、密封盖的示意图；
图4a-4b为用于空气排气口的可拆卸的第一空气盖、密封盖的示意图；
图5为本发明的多参数传感模块另一个实施例的示意图。
具体实施方式
以下基于实施例对本发明进行描述，但是本发明并不仅仅限于这些实施例。在下文对本发明的细节描述中，详尽描述了一些特定的细节部分。对本领域技术人员来说没有这些细节部分的描述也可以完全理解本发明。为了避免混淆本发明的实质，公知的方法、过程、流程、元件和电路并没有详细叙述。
此外，本领域普通技术人员应当理解，在此提供的附图都是为了说明的目的，并且附图不一定是按比例绘制的。
除非上下文明确要求，否则整个说明书和权利要求书中的“包括”、“包含”等类似词语应当解释为包含的含义而不是排他或穷举的含义；也就是说，是“包括但不限于”的含义。
在本发明的描述中，需要理解的是，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性。此外，在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。
图1为本发明的多参数传感模块实施例的结构图。如图1所示，多参数传感模块10包括：壳体101、第一隔板102、第二隔板103、第一空气进气口104a、第二空气进气口104b、第一空气排气口105a、第二空气排气口105b、温湿度传感器106、颗粒物传感器107、加热器件108、控制单元109、VOC传感器110、CO2传感器111、温度传感器112以及风扇113。控制单元109通过线路分别同温湿度传感器106、颗粒物传感器107、加热器件108、VOC传感器110、CO2传感器111、温度传感器112、风扇113连接，所述线路未在图1中示出。
壳体101用于容纳并支撑第一隔板102、第二隔板103、温湿度传感器106、颗粒物传感器107、控制单元109、加热器件108、CO2传感器111、VOC传感器110、温度传感器112以及风扇113，使这些部件与外界隔离。
图2为壳体101的结构示意图。如如图2所示，壳体101包括第一壳体101a和第二壳体101b。图1中第一隔板102、第二隔板103、温湿度传感器106、颗粒物传感器107、控制单元109、加热器件108、CO2传感器111、VOC传感器110、温度传感器112以及风扇113都安装固定在第二壳体101b上。第一壳体101a和第二壳体101b使用铝材料通过模具铸造制成。通过将第一壳体101a和第二壳体101b直接闭合和加固就得到了壳体101。
如图1所示，壳体101具有2个空气进气口：第一空气进气口104a和第二空气进气口104b。第一空气进气口104a位于壳体101的侧面1011，第二空气进气口104b位于壳体101的底面。外部空气通过空气进气口进入多参数传模块10内部的气道。第一空气进气口104a和第二空气进气口104b分别设置有可拆卸的第二空气盖和密封盖。使用时将其中之一直接插入空气进气口的插槽中。图3a-3c为用于空气进气口的可拆卸的第二空气盖、密封盖的示意图。如图3a所示，第二空气盖可以设有若干条平行相间的条状长孔通风孔，即百叶窗扩散式；在一个优选的实施例中，第二空气盖如图3b所示，第二空气盖设有连接气管的接口，即管道式；密封盖如图3c所示，密 封盖用于关闭空气进气口。例如当第一空气进气口104a插上第二空气盖时，第二空气进气口104b应插上密封盖，即第二空气进气口104b被关闭。相反当第二空气进气口104b插上第二空气盖时，第一空气进气口104a应插上密封盖。由此，根据使用环境以及安装方式可以灵活地选择空气进气口的位置和进气方式。
壳体101具有2个空气排气口：第一空气排气口105a和第二空气排气口105b。与壳体101的侧面1011相对的是壳体101的另一侧面1012，第一空气排气口105a位于壳体101的侧面1012，第二空气排气口105b位于壳体101的底面。多参数传模块10的气道中的空气通过空气排气口排出。第一空气排气口105a和第二空气排气口105b分别设置有可拆卸的第一空气盖和密封盖。图4a-4b为用于空气排气口的可拆卸的第一空气盖、密封盖的示意图。如图4a所示，第一空气盖设有若干条平行相间的条状长孔通风孔，即百叶窗式排气口；如图4b所示，密封盖用于关闭空气排气口。由此，根据使用环境以及安装方式可以灵活地选择空气排气口的位置。
多参数传感模块10的空气进气口和空气排气口设计为数种不同的进风出风组合方式。用户可以根据应用的安装环境和安装方式，灵活地选择不同的空气进气口和空气排气口位置组合，以及空气进气口的进气方式。
第一隔板102设置于壳体101的中部，与壳体101和第二隔板103连接。第一隔板102将颗粒物传感器107同控制单元109、CO2传感器111、VOC传感器110、温度传感器112、风扇113、第一空气排气口105a和第二空气排气口105b隔开。
第二隔板103设置于第一空气进气口104a、第二空气进气口104b和颗粒物传感器107之间，第二隔板103与壳体101和第一隔板102连接。第二隔板103用于将颗粒物传感器107同第一空气进气口104a和第二空气进气口104b、温湿度传感器106隔开。第一隔板102、第二隔板103和壳体101共同围成一个包围颗粒物传感器107的腔体作为颗粒物传感器107的气室，所述的气室避免外界光对颗粒物传感器107的干扰，同时也能使颗粒物传感器107产生的激光不会外泄。第一隔板102、第二隔板103和壳体101均为铸造铝材料。第一隔板102、第二隔板103和壳体101b为一体结构，通过模具一体形成。第一隔板102、第二隔板103和壳体101还共同构成了多参数传感模块10内部的气道。所述的气道以空气进气口为首以空气排气口为尾，进入气道的空气依次经过温湿度传感器106、颗粒物传感器107、加热器件108、控制单元109、VOC传感器110、CO2传感器111和温度传感器112。
温湿度传感器106设置于壳体101内部，临近第一空气进气口104a和第二空气 进气口104b，用于检测空气进气口处的空气温度和空气湿度，并将空气进口处的空气温度和空气湿度发送给控制单元109。
颗粒物传感器107位于由第一隔板102、第二隔板103和壳体101共同围成的气室中。在本实施例中颗粒物传感器107为激光散射微小颗粒物传感器，用于检测直径小于等于2.5微米的微小颗粒物以及直径小于等于10微米的粉尘颗粒物在空气中的含量。颗粒物传感器107包括一个激光发射器和一个激光接收器。该激光散射微小颗粒物传感器实时将分别检测到PM2.5颗粒和PM10颗粒的浓度发送到控制单元109。
气体传感器模块包括CO2传感器111和VOC传感器110。CO2传感器111用于检测空气中的CO2浓度，并将检测到的CO2浓度发送给控制单元109。VOC传感器110用于检测空气中挥发性有机化合物的浓度。在本实施例中所述的挥发性有机化合物包括甲醛、甲苯、氨气、香烟烟雾、酒精等。VOC传感器110将检测到的VOC浓度发送给控制单元109。
加热器件108设置于气道中,气体传感器模块之前，用于加热气道中空气的温度。加热器件108根据控制单元109的命令开启或者关闭。加热器件108可以是采用任何利用电能达到加热效果的器件如采用电磁加热，红外线加热，电阻加热等方式。本实施例中加热器件108采用电阻加热方式。在一个优选的实施例中，加热器件108有多个发热功率，所述的发热功率的选择由控制单元109控制。
温度传感器112设置于第一空气排气口105a和第二空气排气口105b附近，用于检测气体传感器模块处的空气温度并将气体传感器模块处的空气温度发送给控制单元109。
风扇113位于壳体101内，设置多参数传模块10的气道尾部，用于驱动多参数传模块10气道中的空气经过空气排气口排出。
控制单元109接收传感器检测到的CO2浓度、VOC浓度、PM2.5/PM10浓度、空气进气口处的空气湿度和空气温度、气体传感器模块处的空气温度。控制单元109在气体传感器模块处的空气温度低于第一温度阈值时开启加热器件108，当气体传感器模块处的空气温度大于第二温度阈值并且持续超过第一时间阈值后关闭加热器件108。在一个优选的实施例中，第一温度阈值为0摄氏度，第二温度阈值为10摄氏度，第一阈值时间为10秒。
控制单元109中还根据空气进气口处的空气湿度对颗粒物传感器107的PM2.5/PM10浓度检测值进行补偿。控制单元109基于如下公式对颗粒物传感器107 的PM2.5/PM10浓度检测值进行补偿：
Z＝(p1+p2*x+p3*x2+p4*y+p5*y2)/(1+p6*x+p7*y)
其中，x为颗粒物传感器107的PM2.5/PM10浓度检测值，y为空气入口处的空气湿度，Z为经补偿的PM2.5/PM10浓度值；
p1＝-97.3402743047253；p2＝6.12542455498836；
p3＝-0.0910880350446089；p4＝0.0131784988508396；
p5＝9.30928475757443E-8；p6＝-0.0199220178034449；
p7＝5.58069786921768E-5。
控制单元109将CO2浓度、VOC浓度、经补偿的PM2.5/PM10浓度、空气进气口处的空气温度和空气湿度发送给外部接收装置。
图5为本发明的多参数传感模块的另一个实施例的示意图。如图5所示，本实施例中多参数传感模块10还包括空气除湿管115和气泵114。
壳体101与前一实施例完全相同，同样的位置设置有第一空气进气口104a和第二空气进气口104b。
空气除湿管115与气泵114连接。空气除湿管115中安装了空气干燥带，空气干燥带表面涂有化学物质，所述的化学物质将吸收空气中的水分并转化为其他化学成分挥发。空气干燥带将通过的空气湿度降低至60％RH以下，从而尽量减少环境空气湿度过大造成对CO2传感器、VOC传感器、颗粒物传感器检测值的偏差。
气泵114连接空气除湿管115和第一空气进气口104a或第二空气进气口104b。与气泵114连接的空气进气口使用第二空气盖，另一个空气进口则采用密封盖。气泵114用于驱动经过空气除湿管115后进入进气口的空气。
本发明的多参数传感模块可以提供同时多个空气环境参数，并且在低温环境下通过内部的加热器件对空气进行加热处理，空气被加热后再进入气体传感器，可以防止传感器工作失效，并能避免多参数传感模块壳体内部结露；本发明的多参数传感模块通过内部补偿和/或外部除湿提高了CO2传感器、VOC传感器、激光微小颗粒物传感器参数的测量精度；本发明的多参数传感模块采用全密闭铸造铝结构确保了模块内部的气闭性和屏蔽性，确保激光无外漏，同时提高了抗外界干扰能力。本发明的多参数传感模块提供了多种空气进气口和空气排气口设计，用户可以根据使用环境灵活选择。
以上所述仅为本发明的优选实施例，并不用于限制本发明，对于本领域技术人员而言，本发明可以有各种改动和变化。凡在本发明的精神和原理之内所作的任何修改、 等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种多参数传感模块，包括：
    壳体，具有至少一个空气进气口和至少一个空气排气口；
    多个隔板，设置于所述空气进气口和空气排气口之间，用于形成气道；
    风扇，设置于所述空气排气口处，用于驱动气道中的空气从空气排气口排出；
    温湿度传感器，设置于所述空气进气口处，用于检测空气进气口处的空气温度和空气湿度；
    颗粒物传感器；
    气体传感器模块，设置于所述气道中，包括至少一种气体传感器；
    温度传感器，设置于所述气道中，用于检测气体传感器模块处的空气温度；
    加热器件，设置于所述气道中，所述的气体传感器模块之前，在空气进入气体传感器模块之前将空气加热至有效工作温度；
    控制单元，设置于所述气道中，控制所述加热器件的开启和关闭以及根据所述空气进气口处的空气湿度对所述颗粒物传感器的检测值进行补偿；
    所述多个隔板与所述壳体一体形成，形成用于容纳所述颗粒物传感器的气室结构。
  2. 根据权利要求1所述的多参数传感模块，其特征在于，所述多个隔板包括：
    第一隔板，设置于所述颗粒物传感器和所述气体传感器模块之间；
    第二隔板，设置于所述空气进气口和所述颗粒物传感器之间；
    所述第一隔板和第二隔板相互连接，包围所述颗粒物传感器。
  3. 根据权利要求1所述的多参数传感模块，其特征在于，所述颗粒物传感器为激光散射微小颗粒物传感器，测量空气中的PM2.5和/或PM10的浓度。
  4. 根据权利要求3所述的多参数传感模块，其特征在于，所述控制单元基于如下公式对所述激光散射微小颗粒物传感器的PM2.5或PM10检测值进行补偿：
    Z＝(p1+p2*x+p3*x2+p4*y+p5*y2)/(1+p6*x+p7*y)
    其中，x为所述检测值，y为所述空气湿度，Z为经补偿的检测值；
    p1＝-97.3402743047253；p2＝6.12542455498836；
    p3＝-0.0910880350446089；p4＝0.0131784988508396；
    p5＝9.30928475757443E-8；p6＝-0.0199220178034449；
    p7＝5.58069786921768E-5。
  5. 根据权利要求1所述的多参数传感模块，其特征在于，所述壳体包括两个方向的空气排气口，分别设置于壳体的不同侧面，所述空气排气口分别设置有可拆卸的第一空气盖和密封盖，所述第一空气盖具有可供空气流通的孔洞，所述密封盖用于关闭空气排气口。
  6. 根据权利要求1所述的多参数传感模块，其特征在于，所述壳体包括两个方向的空气进气口，分别设置于壳体的不同侧面，所述空气进气口分别设置有可拆卸的第二空气盖和密封盖，所述第二空气盖具有可供空气流通的孔洞或用于连接气管的接口，所述密封盖用于关闭空气进气口。
  7. 根据权利要求1所述的多参数传感模块，其特征在于，所述多参数传感模块还包括：
    气泵，设置于壳体外，与所述空气进气口连接；
    空气除湿管，设置于壳体外，与所述气泵连接。
  8. 根据权利要求1所述的多参数传感模块，其特征在于，所述壳体和所述隔板采用铝铸造一体形成。
  9. 根据权利要求1所述的多参数传感模块，其特征在于，所述控制单元在气体传感器模块处的空气温度小于第一温度阈值时开启所述加热器件，在气体传感器模块处的空气温度大于第二温度阈值并且持续第一时间阈值后关闭所述加热器件。
  10. 根据权利要求1所述的多参数传感模块，其特征在于，所述温度传感器位于所述气道的尾部。
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