WO2018076405A1 - 粉尘检测装置 - Google Patents

粉尘检测装置 Download PDF

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Publication number
WO2018076405A1
WO2018076405A1 PCT/CN2016/105719 CN2016105719W WO2018076405A1 WO 2018076405 A1 WO2018076405 A1 WO 2018076405A1 CN 2016105719 W CN2016105719 W CN 2016105719W WO 2018076405 A1 WO2018076405 A1 WO 2018076405A1
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air flow
dust
thermistor
air
flow rate
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PCT/CN2016/105719
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English (en)
French (fr)
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付浩
郑镇杰
田佳琦
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广东奥迪威传感科技股份有限公司
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Publication of WO2018076405A1 publication Critical patent/WO2018076405A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions

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  • the invention relates to the technical field of dust detection, and in particular to a dust detecting device.
  • the dust detecting device usually adopts the principle of light scattering, irradiates air particles by laser or infrared rays, collects the reflected light signal, and uses statistical principles to calculate the amount or concentration of particles in the air.
  • the conventional dust detecting device requires an air flow passage with air introducing minute particles, and the air containing the particulate matter is sent to the detecting end of the dust sensor through the air flow passage for light detection.
  • the conventional dust detecting device often introduces air containing particulate matter into the airflow passage by the air blower. After the blower is used for a long time, the fan blade of the blower is likely to deposit more dust, and the dust accumulated on the fan blade may be mixed into the air.
  • the airflow channel affects the accuracy of the detection data of the dust sensor.
  • the present invention overcomes the deficiencies of the prior art and provides a dust detecting device capable of improving the detection accuracy.
  • the dust detecting device comprises: a housing, the housing is provided with a first air inlet and a first air outlet, and the housing inner cavity passes through the first air inlet, the first outlet
  • the air port is in communication with the external environment;
  • the electric pump and the dust detecting assembly, the pressure electric pump and the dust detecting assembly are both disposed on the casing, and the electric pump is used to pass air outside the casing
  • the first air inlet is fed into the housing, and the dust detecting assembly is configured to detect a dust content of air in the housing.
  • the pressure electric pump and the dust detecting assembly are both disposed inside the casing, the casing is provided with an air flow passage, and the pressure electric pump has a second air inlet and a second An air outlet, the second air inlet is in communication with the first air inlet, the second air outlet is in communication with the air flow passage, and the dust detecting component is located at a side of the air flow passage, the dust Detection group The detecting end of the piece is disposed opposite to the air flow channel.
  • the dust detecting device further includes a flow rate sensor disposed in the air flow passage, the flow rate sensor being configured to acquire an air flow rate in the air flow passage.
  • the housing is provided with an open area
  • the housing open area cover is provided with a control circuit board, the control circuit board and the flow rate sensor, the dust detecting component and the piezoelectric
  • the air pump is electrically connected
  • the housing is internally provided with a fixing frame for fixing the dust detecting component and the pressure electric pump in the housing, the fixing frame and the control
  • the circuit board cooperates to form the airflow passage.
  • a protective cover is externally connected to the housing, and the protective cover is disposed on the control circuit board.
  • the dust detecting device further includes a driving voltage determining module and a warning module, wherein the driving voltage determining module is connected to the driving power of the warning module and the piezoelectric pump, and the driving voltage determining module is used for Determining whether the driving voltage of the piezoelectric electric pump is greater than a first preset value, the warning device is configured to perform an alarm action when a driving voltage of the piezoelectric electric pump is greater than a first preset value.
  • the dust detecting device further includes an air flow rate determining module and a driving voltage control module, wherein the air flow rate determining module is connected to the flow rate sensor, and the driving voltage control module and the driving power source of the pressure electric pump Connected, the air flow rate determining module is configured to determine whether the air flow rate in the air flow channel is greater than a second preset value, and the driving voltage control module is configured to use the air flow rate in the air flow channel to be greater than a second preset value. The driving voltage of the driving power source is lowered.
  • the air flow rate determining module is further configured to determine whether an air flow rate in the air flow passage is less than a third preset value, and the driving voltage control module is further configured to use air in the air flow passage.
  • the driving voltage of the driving power source is increased when the flow rate is less than the third predetermined value.
  • the flow rate sensor includes a first thermistor, a second thermistor and a voltage detecting module, and the first thermistor and the second thermistor are connected in series in a constant voltage source circuit
  • the voltage detecting module is configured to acquire a voltage across the first thermistor or the The voltage across the second thermistor, the first thermistor and the second thermistor are sequentially disposed in the airflow channel along the airflow direction.
  • the flow rate sensor includes a first thermistor, a second thermistor, a potentiometer and a voltage detecting module, and the first thermistor and the second thermistor are connected in series in a constant In the voltage source circuit, the first thermistor is connected in series with the second thermistor, and is connected in parallel with two fixed lead ends of the potentiometer, and the voltage detecting module is configured to acquire the first heat a voltage between a test end between the varistor and the second thermistor, and a movable lead end of the potentiometer, the first thermistor and the second thermistor sequentially along the airflow direction It is disposed in the air flow passage.
  • the above-mentioned dust detecting device feeds external air into the casing through a pressure electric pump, and the pressure electric pump is not easy to collect dust, so that the dust can be easily detected by the dust easily deposited on the fan blades of the conventional air blower. Poor phenomenon, which makes the dust detection accuracy greatly improved.
  • An open area is provided in the housing.
  • the open area cover of the housing is provided with a control circuit board.
  • the control circuit board is electrically connected to the flow rate sensor, the dust detecting component and the pressure electric pump.
  • a fixing bracket is mounted inside the housing.
  • the fixing frame is used for fixing the dust detecting component and the pressure electric pump in the casing, and the fixing frame cooperates with the control circuit board to form an air flow passage. In this way, the air flow channel is formed by the control circuit board and the fixing frame for fixing the dust detecting component and the pressure electric pump, so that the volume of the dust detecting device is as small as possible, and the dust detecting effect is relatively stable.
  • a protective cover is attached to the outside of the housing.
  • the protective cover is disposed on the control circuit board.
  • the protective cover can prevent the control circuit board from being damaged by friction, breakage, etc., and can protect the control circuit board.
  • the dust detecting device further includes a driving voltage judging module and a warning module.
  • the driving voltage determination module is connected to the warning module and the driving power of the piezoelectric pump.
  • the driving voltage determining module is configured to determine whether a driving voltage of the piezoelectric pump is greater than a first preset value.
  • the warning device is configured to perform an alarm action when a driving voltage of the piezoelectric electric pump is greater than a first preset value.
  • the driving voltage judging module judges that the driving voltage of the electric pump is greater than the first preset value, it indicates that a large amount of dust is accumulated in the airflow passage due to long-term use, and the accumulated dust in the airflow passage causes the wind resistance to increase, thus causing The driving voltage of the pressure electric pump increases.
  • Driving of the electric pump by means of a warning device When the voltage is greater than the first preset value, the alarm action can be performed, and the worker can be notified to clean the dust detecting device at the same time.
  • the control reduces the driving voltage of the pressure electric pump, so that the air flow rate of the piezoelectric electric pump into the casing is reduced.
  • the driving voltage of the boosting electric pump is controlled to increase the flow rate of the air that the piezoelectric electric pump feeds into the casing. In this way, the flow rate of the gas ejected per unit time of the electric pump can be consistent, thereby ensuring the accuracy of the dust content detection of the dust detecting device.
  • FIG. 1 is a schematic structural view of one of the dust detecting devices according to the embodiment of the present invention.
  • FIG. 2 is a schematic structural view of one of the dust detecting devices according to the embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of one of the dust detecting devices according to the embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of one of flow velocity sensors in a dust detecting device according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of one of flow rate sensors in a dust detecting device according to an embodiment of the present invention.
  • the dust detecting device includes a housing 10 , a piezoelectric pump 20 , and a dust detecting assembly 30 .
  • the housing 10 is provided with a first air inlet 11 and a first air outlet 12, and the inner cavity of the housing 10 communicates with the external environment through the first air inlet 11 and the first air outlet 12.
  • the pressure electric pump 20 and the dust detecting assembly 30 are both disposed on the casing 10.
  • the piezoelectric electric pump 20 is configured to feed outside air of the casing 10 into the casing 10 through the first intake port 11.
  • the piezoelectric electric pump 20 in the present embodiment mainly supplies external air into the casing 10 of the dust detecting device in such a manner that the inner chamber of the pump chamber is enlarged or contracted by the vibration structure. Specifically, during the expansion of the chamber of the pump chamber, the air outside the dust detecting device is sucked into the pump chamber through the first air inlet 11 and the second air inlet 21; during the process of reducing the chamber of the pump, the air in the pump chamber passes through the row. The air passage and the second air outlet 22 are discharged into the casing 10 of the dust detecting device.
  • the dust detecting assembly 30 is for detecting the dust content of the air in the casing 10.
  • the dust detecting assembly 30 in this embodiment may employ a laser or infrared detecting component.
  • the above-mentioned dust detecting device feeds external air into the casing 10 through the electric pump 20, and the electric pump 20 is not easy to collect dust, so that the dust can be easily detected by the dust on the blade of the conventional blower.
  • the pressure electric pump 20 and the dust detecting assembly 30 are both disposed inside the casing 10.
  • the airflow passage 13 is disposed in the casing 10.
  • the piezoelectric electric pump 20 has a second intake port 21 and a second air outlet port 22.
  • the second air inlet 21 communicates with the first air inlet 11
  • the second air outlet 22 communicates with the air flow passage 13 .
  • the dust detecting assembly 30 is located at a side of the air flow passage 13 , and the detecting end of the dust detecting assembly 30 is disposed opposite to the air flow passage 13 .
  • the detecting end of the dust detecting component 30 irradiates the particles in the air by the emitted laser or infrared rays, and collects the reflected optical signals, and uses statistical principles to calculate the amount of particulate matter in the air or concentration.
  • the position of the dust detecting assembly 30 in the casing 10 can be set according to actual conditions (as shown in FIG. 2, FIG. 2 is an embodiment in which the position of the dust detecting assembly 30 in the casing 10 is different from that of the dust detecting device shown in FIG. 1). .
  • the dust detecting device further includes a flow rate sensor 40.
  • the flow rate sensor 40 is disposed in the air flow passage 13 for acquiring an air flow rate in the air flow passage 13. After the dust detecting device is used for a long time, a large amount of dust is easily collected in the airflow passage 13, and the accumulated dust in the airflow passage 13 will affect the air flow velocity in the airflow passage 13, and the airflow velocity is obtained by the flow velocity sensor 40, and can be used for judging The dust deposition amount in the air flow passage 13 and the dust detecting device can be cleaned in time to improve the accuracy of the dust content detection.
  • the housing 10 is provided with an open area 14.
  • the open area 14 of the housing 10 is covered with a control circuit board 50.
  • the control circuit board 50 is electrically connected to the flow rate sensor 40, the dust detecting component 30, and the piezoelectric pump 20.
  • a fixing bracket 60 is mounted inside the casing 10.
  • the fixing frame 60 is configured to fix the dust detecting assembly 30 and the pressure electric pump 20 in the casing 10, and the fixing frame 60 cooperates with the control circuit board 50 to form the air flow passage 13.
  • the air flow passage 13 is formed by the control circuit board 50 and the fixing frame 60 for fixing the dust detecting unit 30 and the electric pump 20, so that the volume of the dust detecting device is as small as possible, and the dust detecting effect is relatively stable.
  • a protective cover 70 is externally connected to the casing 10.
  • the protective cover 70 is disposed on the control circuit board 50.
  • the protective cover 70 can prevent the control circuit board 50 from being damaged by friction, breakage, etc., and can protect the control circuit board 50.
  • the dust detecting device further includes a driving voltage judging module and a warning module.
  • the driving voltage determination module is connected to the warning module and the driving power of the piezoelectric pump 20.
  • the driving voltage determining module is configured to determine whether the driving voltage of the piezoelectric pump 20 is greater than a first preset value.
  • the warning device is configured to perform an alarm action when the driving voltage of the piezoelectric pump 20 is greater than a first preset value.
  • the first preset value may be correspondingly set according to the actual driving voltage value of the corresponding electric pump 20 when the air flow rate is subjected to a large resistance, and will not be described.
  • the driving voltage determination module determines that the driving voltage of the piezoelectric pump 20 is greater than the first preset value, it indicates that a large amount of dust is accumulated in the airflow channel 13 due to long-term use, and the accumulated dust in the airflow channel 13 causes the wind resistance to increase. This causes the driving voltage of the electric pump 20 to increase.
  • the warning device performs an alarm action when the driving voltage of the piezoelectric pump 20 is greater than the first preset value, the worker can be notified of the cleaning operation of the dust detecting device in time.
  • the dust detecting device further includes an air flow rate determining module and a driving voltage control module.
  • the air flow rate determination module is coupled to the flow rate sensor 40.
  • the driving voltage control module is connected to a driving power source of the piezoelectric pump 20.
  • the air flow rate determining module is configured to determine whether the air flow rate in the air flow channel 13 is greater than a second preset value.
  • the driving voltage control module is configured to reduce a driving voltage of the driving power source when an air flow rate in the airflow channel 13 is greater than a second preset value.
  • the air flow rate determining module is further configured to determine whether the air flow rate in the air flow channel 13 is less than a third pre-predetermined Set the value.
  • the second preset value and the third preset value may be correspondingly set according to the driving voltage value of the piezoelectric electric pump 20 corresponding to the actually required air flow rate.
  • the driving voltage control module is further configured to increase a driving voltage of the driving power source when an air flow rate in the airflow channel 13 is less than a third preset value.
  • the control reduces the driving voltage of the electric pump 20, so that the flow rate of the air sent to the casing 10 by the electric pump 20 is reduced.
  • the driving voltage of the boosting electric pump 20 is controlled to increase the flow rate of the air that the piezoelectric electric pump 20 feeds into the casing 10. In this way, the flow rate of the gas discharged by the pressure electric pump 20 per unit time is always consistent, thereby ensuring the accuracy of the dust content detection of the dust detecting device.
  • the driving voltage determining module, the warning module, the air flow rate determining module, and the driving voltage control module are disposed on the control circuit board 50.
  • the dust detecting device can be made as small as possible and easy to assemble and disassemble.
  • the flow rate sensor 40 includes a first thermistor 41 , a second thermistor 42 and a voltage detecting module 43 .
  • the first thermistor 41 and the second thermistor 42 are connected in series in a constant voltage source circuit, and the first thermistor 41 and the second thermistor 42 are positive temperature coefficient thermistors.
  • the voltage detecting module 43 is configured to acquire a voltage across the first thermistor 41 or a voltage across the second thermistor 42.
  • the first thermistor 41 and the second thermistor 42 are sequentially disposed in the airflow passage 13 along the airflow direction.
  • the difference between the resistance values of the first thermistor 41 and the second thermistor 42 is increased, and the voltage detected by the voltage detecting module 43 is changed.
  • the detected voltage control lowers the driving voltage of the piezoelectric pump 20, so that the flow rate of the air that the piezoelectric electric pump 20 feeds into the casing 10 is reduced.
  • the difference between the resistance values of the first thermistor 41 and the second thermistor 42 becomes smaller, and the voltage detected by the voltage detecting module 43 also changes, according to the voltage detecting module 43.
  • the detected voltage control raises the driving voltage of the piezoelectric pump 20, so that the flow rate of the air that the piezoelectric electric pump 20 feeds into the casing 10 increases.
  • the gas flow rate of the electric pump 20 per unit time is always the same, thereby ensuring the accuracy of the dust detecting device dust content detection.
  • the flow rate sensor 40 includes a first thermistor 41 , a second thermistor 42 , a potentiometer 44 , and a voltage detecting module 43 .
  • the first thermistor 41 is connected in series with the second thermistor 42 in a constant voltage source circuit.
  • the first thermistor 41 is connected in series with the second thermistor 42 and is connected in parallel with the two fixed lead ends of the potentiometer 44.
  • the voltage detecting module 43 is configured to acquire a voltage between the test end between the first thermistor 41 and the second thermistor 42 and the movable lead end of the potentiometer 44.
  • the first thermistor 41 and the second thermistor 42 are sequentially disposed in the airflow passage 13 along the airflow direction.
  • the first thermistor 41 and the second thermistor 42 heat up, and the temperature rises, causing the current flowing through it to decrease until equilibrium is reached.
  • the potentiometer 44 is adjusted to make the bridge output voltage zero.
  • the first thermistor 41 of the fluid upper wind head causes the temperature to be lower than the temperature of the second thermistor 42 of the lower wind head due to the faster heat dissipation, resulting in an imbalance of the bridge, and the air flow passage 13
  • the greater the fluid flow rate the greater the bridge imbalance.

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Abstract

一种粉尘检测装置，包括：壳体（10）、压电气泵（20）与粉尘检测组件（30）。所述壳体（10）设有第一进气口（11）与第一出气口（12），所述壳体（10）内腔通过所述第一进气口（11）、所述第一出气口（12）与外界环境相通。所述压电气泵（20）与所述粉尘检测组件（30）均设置在所述壳体（10）上。所述压电气泵（20）用于将所述壳体（10）外部空气通过所述第一进气口（11）送入到所述壳体（10）内。所述粉尘检测组件（30）用于检测所述壳体（10）内的空气的粉尘含量。上述的粉尘检测装置，通过压电气泵（20）将外部空气送入至壳体（10）中，压电气泵（20）中不易于聚集灰尘，这样便可以克服传统的鼓风机的扇叶上容易沉积灰尘导致粉尘检测精确度较差的现象，从而使得粉尘检测精确度大大提高。

Description

粉尘检测装置 技术领域
本发明涉及粉尘检测技术领域，尤其是涉及一种粉尘检测装置。
背景技术
粉尘检测装置通常采用光散射原理，通过激光或红外线照射空气颗粒物，收集反射后的光信号，利用统计学原理来计算空气中颗粒物的数量或浓度。传统的粉尘检测装置均要求带有引入微小颗粒物空气的气流通道，通过气流通道将含有颗粒物的空气送入至粉尘传感器的检测端进行光照检测。然而，传统的粉尘检测装置往往通过鼓风机将含有颗粒物的空气引入到气流通道中，鼓风机长时间使用后，鼓风机的扇叶上容易沉积较多灰尘，鼓风机扇叶上所积累的灰尘可能会混入到气流通道中，并影响到粉尘传感器的检测数据的精确度。
发明内容
基于此，本发明在于克服现有技术的缺陷，提供一种能提高检测精确度的粉尘检测装置。
其技术方案如下：粉尘检测装置，包括：壳体，所述壳体设有第一进气口与第一出气口，所述壳体内腔通过所述第一进气口、所述第一出气口与外界环境相通；压电气泵与粉尘检测组件，所述压电气泵与所述粉尘检测组件均设置在所述壳体上，所述压电气泵用于将所述壳体外部空气通过所述第一进气口送入到所述壳体内，所述粉尘检测组件用于检测所述壳体内的空气的粉尘含量。
在其中一个实施例中，所述压电气泵与所述粉尘检测组件均设置在所述壳体内部，所述壳体内设有气流通道，所述压电气泵具有第二进气口与第二出气口，所述第二进气口与所述第一进气口相通，所述第二出气口与所述气流通道相通，所述粉尘检测组件位于所述气流通道的侧部，所述粉尘检测组 件的检测端与所述气流通道相对设置。
在其中一个实施例中，粉尘检测装置还包括流速传感器，所述流速传感器设置在所述气流通道中，所述流速传感器用于获取所述气流通道中的空气流速。
在其中一个实施例中，所述壳体内设有开口区，所述壳体开口区盖设有控制电路板，所述控制电路板与所述流速传感器、所述粉尘检测组件及所述压电气泵电性连接；所述壳体内部装设有固定架，所述固定架用于将所述粉尘检测组件、所述压电气泵固定于所述壳体中，所述固定架与所述控制电路板配合形成所述气流通道。
在其中一个实施例中，所述壳体外部连接有保护盖，所述保护盖罩设于所述控制电路板。
在其中一个实施例中，粉尘检测装置还包括驱动电压判断模块与警示模块，所述驱动电压判断模块与所述警示模块、所述压电气泵的驱动电源相连，所述驱动电压判断模块用于判断所述压电气泵的驱动电压是否大于第一预设值，所述警示装置用于在所述压电气泵的驱动电压大于第一预设值时进行报警动作。
在其中一个实施例中，粉尘检测装置还包括空气流速判断模块与驱动电压控制模块，所述空气流速判断模块与所述流速传感器相连，所述驱动电压控制模块与所述压电气泵的驱动电源相连，所述空气流速判断模块用于判断所述气流通道中的空气流速是否大于第二预设值，所述驱动电压控制模块用于在所述气流通道中的空气流速大于第二预设值时降低所述驱动电源的驱动电压。
在其中一个实施例中，所述空气流速判断模块还用于判断所述气流通道中的空气流速是否小于第三预设值，所述驱动电压控制模块还用于在所述气流通道中的空气流速小于第三预设值时增大所述驱动电源的驱动电压。
在其中一个实施例中，所述流速传感器包括第一热敏电阻、第二热敏电阻与电压检测模块，所述第一热敏电阻与所述第二热敏电阻串联连接在恒压源电路中，所述电压检测模块用于获取所述第一热敏电阻两端电压或者所述 第二热敏电阻两端电压，所述第一热敏电阻与所述第二热敏电阻沿着气流方向依次设置在所述气流通道中。
在其中一个实施例中，所述流速传感器包括第一热敏电阻、第二热敏电阻、电位器与电压检测模块，所述第一热敏电阻与所述第二热敏电阻串联连接在恒压源电路中，所述第一热敏电阻与所述第二热敏电阻串联连接后与所述电位器的两个固定引线端并联连接，所述电压检测模块用于获取所述第一热敏电阻与所述第二热敏电阻之间的测试端、以及所述电位器的活动引线端之间的电压，所述第一热敏电阻与所述第二热敏电阻沿着气流方向依次设置在所述气流通道中。
下面对前述技术方案的优点或原理进行说明：
1、上述的粉尘检测装置，通过压电气泵将外部空气送入至壳体中，压电气泵中不易于聚集灰尘，这样便可以克服传统的鼓风机的扇叶上容易沉积灰尘导致粉尘检测精确度较差的现象，从而使得粉尘检测精确度大大提高。
2、壳体内设有开口区。壳体开口区盖设有控制电路板。控制电路板与流速传感器、粉尘检测组件及压电气泵电性连接。壳体内部装设有固定架。固定架用于将粉尘检测组件、压电气泵固定于壳体中，固定架与控制电路板配合形成气流通道。如此，通过控制电路板与用于固定粉尘检测组件、压电气泵的固定架来配合形成气流通道，使得粉尘检测装置体积尽可能小型化，且粉尘的检测效果较为稳定。
3、壳体外部连接有保护盖。保护盖罩设于控制电路板。保护盖能避免控制电路板受到摩擦、摔坏等损伤，能够对控制电路板起到保护作用。
4、粉尘检测装置还包括驱动电压判断模块与警示模块。所述驱动电压判断模块与所述警示模块、所述压电气泵的驱动电源相连。所述驱动电压判断模块用于判断所述压电气泵的驱动电压是否大于第一预设值。所述警示装置用于在所述压电气泵的驱动电压大于第一预设值时进行报警动作。当驱动电压判断模块判断到压电气泵的驱动电压大于第一预设值时，则说明气流通道中由于长时间使用集聚了较多灰尘，气流通道中集聚的灰尘使得风阻增大，如此便导致压电气泵的驱动电压增大。通过警示装置在所述压电气泵的驱动 电压大于第一预设值时进行报警动作后，便可以及时的通知工作人员对粉尘检测装置进行清理工作。
5、当气流通道中的空气流速增大后，控制降低压电气泵的驱动电压，使压电气泵送入到壳体中的空气流量减少。而当气流通道中的气流速度减少后，控制升高压电气泵的驱动电压，使压电气泵送入到壳体中的空气流量增大。如此，能使得压电气泵单位时间内喷出的气体流量始终一致，从而确保粉尘检测装置粉尘含量检测的精确度。
附图说明
图1为本发明实施例所述的粉尘检测装置的其中一种结构示意图；
图2为本发明实施例所述的粉尘检测装置的其中一种结构示意图；
图3为本发明实施例所述的粉尘检测装置的其中一种结构示意图；
图4为本发明实施例所述的粉尘检测装置中流速传感器的其中一种结构示意图；
图5为本发明实施例所述的粉尘检测装置中流速传感器的其中一种结构示意图。
附图标记说明：
10、壳体，11、第一进气口，12、第一出气口，13、气流通道，14、开口区，20、压电气泵，21、第二进气口，22、第二出气口，30、粉尘检测组件，40、流速传感器，41、第一热敏电阻，42、第二热敏电阻，43、电压检测模块，44、电位器，50、控制电路板，60、固定架，70、保护盖。
具体实施方式
下面对本发明的实施例进行详细说明：
如图1所示，本发明实施例所述的粉尘检测装置，包括：壳体10、压电气泵20与粉尘检测组件30。所述壳体10设有第一进气口11与第一出气口12，所述壳体10内腔通过所述第一进气口11、所述第一出气口12与外界环境相通。所述压电气泵20与所述粉尘检测组件30均设置在所述壳体10上。
所述压电气泵20用于将所述壳体10外部空气通过所述第一进气口11送入到所述壳体10内。本实施例中的压电气泵20主要是通过振动结构工作时使泵室内腔体扩大或缩小的方式将外部空气送入至粉尘检测装置的壳体10中。具体的，泵室内腔体扩大过程中，粉尘检测装置外部的空气通过第一进气口11、第二进气口21吸入到泵室中；泵室内腔体缩小过程中，泵室内空气通过排气通道以及第二出气口22排出至粉尘检测装置的壳体10中。所述粉尘检测组件30用于检测所述壳体10内的空气的粉尘含量。本实施例中的粉尘检测组件30可以采用激光或红外线检测组件。
上述的粉尘检测装置，通过压电气泵20将外部空气送入至壳体10中，压电气泵20中不易于聚集灰尘，这样便可以克服传统的鼓风机的扇叶上容易沉积灰尘导致粉尘检测精确度较差的现象，从而使得粉尘检测精确度大大提高。
在本实施例中，所述压电气泵20与所述粉尘检测组件30均设置在所述壳体10内部.所述壳体10内设有气流通道13。所述压电气泵20具有第二进气口21与第二出气口22。所述第二进气口21与所述第一进气口11相通，所述第二出气口22与所述气流通道13相通。所述粉尘检测组件30位于所述气流通道13的侧部，所述粉尘检测组件30的检测端与所述气流通道13相对设置。含有颗粒物的空气流经气流通道13时，粉尘检测组件30的检测端通过发射的激光或红外线照射空气中的颗粒物，并收集反射后的光信号，利用统计学原理来计算空气中颗粒物的数量或浓度。粉尘检测组件30在壳体10内的位置可以根据实际情况设置(如图2所示，图2为粉尘检测组件30在壳体10中的位置不同于图1所述粉尘检测装置的实施例)。
其中，粉尘检测装置还包括流速传感器40。所述流速传感器40设置在所述气流通道13中，所述流速传感器40用于获取所述气流通道13中的空气流速。粉尘检测装置长时间使用后，气流通道13中容易集聚大量粉尘，气流通道13中集聚的粉尘将影响到气流通道13中的空气流速，通过流速传感器40获取到空气流速后，便可用于判断出气流通道13中粉尘沉积量，并可以及时的对粉尘检测装置进行清理操作，以提高粉尘含量检测的精确度。
请参阅图3，所述壳体10内设有开口区14。所述壳体10开口区14盖设有控制电路板50。所述控制电路板50与所述流速传感器40、所述粉尘检测组件30及所述压电气泵20电性连接。所述壳体10内部装设有固定架60。所述固定架60用于将所述粉尘检测组件30、所述压电气泵20固定于所述壳体10中，所述固定架60与所述控制电路板50配合形成所述气流通道13。如此，通过控制电路板50与用于固定粉尘检测组件30、压电气泵20的固定架60来配合形成气流通道13，使得粉尘检测装置体积尽可能小型化，且粉尘的检测效果较为稳定。
所述壳体10外部连接有保护盖70。所述保护盖70罩设于所述控制电路板50。保护盖70能避免控制电路板50受到摩擦、摔坏等损伤，能够对控制电路板50起到保护作用。
粉尘检测装置还包括驱动电压判断模块与警示模块。所述驱动电压判断模块与所述警示模块、所述压电气泵20的驱动电源相连。所述驱动电压判断模块用于判断所述压电气泵20的驱动电压是否大于第一预设值。所述警示装置用于在所述压电气泵20的驱动电压大于第一预设值时进行报警动作。第一预设值可以根据实际情况中，空气流速受到较大阻力时对应的压电气泵20的驱动电压值相应设置，不进行赘述。当驱动电压判断模块判断到压电气泵20的驱动电压大于第一预设值时，则说明气流通道13中由于长时间使用集聚了较多灰尘，气流通道13中集聚的灰尘使得风阻增大，如此便导致压电气泵20的驱动电压增大。通过警示装置在所述压电气泵20的驱动电压大于第一预设值时进行报警动作后，便可以及时的通知工作人员对粉尘检测装置进行清理工作。
粉尘检测装置还包括空气流速判断模块与驱动电压控制模块。所述空气流速判断模块与所述流速传感器40相连。所述驱动电压控制模块与所述压电气泵20的驱动电源相连。所述空气流速判断模块用于判断所述气流通道13中的空气流速是否大于第二预设值。所述驱动电压控制模块用于在所述气流通道13中的空气流速大于第二预设值时降低所述驱动电源的驱动电压。所述空气流速判断模块还用于判断所述气流通道13中的空气流速是否小于第三预 设值。第二预设值、第三预设值可以根据实际所需的空气流速相对应的压电气泵20的驱动电压值进行相应设置。所述驱动电压控制模块还用于在所述气流通道13中的空气流速小于第三预设值时增大所述驱动电源的驱动电压。如此，当气流通道13中的空气流速增大后，控制降低压电气泵20的驱动电压，使压电气泵20送入到壳体10中的空气流量减少。而当气流通道13中的气流速度减少后，控制升高压电气泵20的驱动电压，使压电气泵20送入到壳体10中的空气流量增大。如此，能使得压电气泵20单位时间内喷出的气体流量始终一致，从而确保粉尘检测装置粉尘含量检测的精确度。
本实施例中，所述驱动电压判断模块、所述警示模块、所述空气流速判断模块与所述驱动电压控制模块设置于所述控制电路板50。如此，能尽可能使得粉尘检测装置体积小型化，且便于装拆。
请参阅图4，所述流速传感器40包括第一热敏电阻41、第二热敏电阻42与电压检测模块43。所述第一热敏电阻41与所述第二热敏电阻42串联连接在恒压源电路中，且第一热敏电阻41与第二热敏电阻42为正温度系数的热敏电阻。所述电压检测模块43用于获取所述第一热敏电阻41两端电压或者所述第二热敏电阻42两端电压。所述第一热敏电阻41与所述第二热敏电阻42沿着气流方向依次设置在所述气流通道13中。当气流通道13中的空气流速增大后，第一热敏电阻41与第二热敏电阻42的阻值差异会加大，电压检测模块43检测的电压便会发生变化，根据电压检测模块43检测的电压控制降低压电气泵20的驱动电压，使压电气泵20送入到壳体10中的空气流量减少。而当气流通道13中的气流速度减少后，第一热敏电阻41与第二热敏电阻42的阻值差异会变小，电压检测模块43检测的电压同样会发生变化，根据电压检测模块43检测的电压控制升高压电气泵20的驱动电压，使压电气泵20送入到壳体10中的空气流量增大。如此，无论粉尘检测装置外部环境如何，压电气泵20单位时间内喷出的气体流量始终一致，从而确保粉尘检测装置粉尘含量检测的精确度。
请参阅图5，在另中一个实施例中，所述流速传感器40包括第一热敏电阻41、第二热敏电阻42、电位器44与电压检测模块43。所述第一热敏电阻 41与所述第二热敏电阻42串联连接在恒压源电路中。所述第一热敏电阻41与所述第二热敏电阻42串联连接后与所述电位器44的两个固定引线端并联连接。所述电压检测模块43用于获取所述第一热敏电阻41与所述第二热敏电阻42之间的测试端、以及所述电位器44的活动引线端之间的电压。所述第一热敏电阻41与所述第二热敏电阻42沿着气流方向依次设置在所述气流通道13中。当桥路通电后，第一热敏电阻41与第二热敏电阻42由于发热，温度上升，导致其流经电流减少，直至达到平衡。此时调节电位器44，使桥路输出电压为零。当气流通道13中流体开始流动时，流体上风头的第一热敏电阻41由于较快散热使得温度会比下风头的第二热敏电阻42的温度低，导致电桥失衡，且气流通道13中流体流动速度越大，电桥不平衡程度越大。通过电压检测模块43测量出桥路的电压失衡数值，便可以测出两只电阻的温度差，进而可测量出气流通道13中流体流速。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 粉尘检测装置，其特征在于，包括：
    壳体，所述壳体设有第一进气口与第一出气口，所述壳体内腔通过所述第一进气口、所述第一出气口与外界环境相通；
    压电气泵与粉尘检测组件，所述压电气泵与所述粉尘检测组件均设置在所述壳体上，所述压电气泵用于将所述壳体外部空气通过所述第一进气口送入到所述壳体内，所述粉尘检测组件用于检测所述壳体内的空气的粉尘含量。
  2. 根据权利要求1所述的粉尘检测装置，其特征在于，所述压电气泵与所述粉尘检测组件均设置在所述壳体内部，所述壳体内设有气流通道，所述压电气泵具有第二进气口与第二出气口，所述第二进气口与所述第一进气口相通，所述第二出气口与所述气流通道相通，所述粉尘检测组件位于所述气流通道的侧部，所述粉尘检测组件的检测端与所述气流通道相对设置。
  3. 根据权利要求2所述的粉尘检测装置，其特征在于，还包括流速传感器，所述流速传感器设置在所述气流通道中，所述流速传感器用于获取所述气流通道中的空气流速。
  4. 根据权利要求3所述的粉尘检测装置，其特征在于，所述壳体内设有开口区，所述壳体开口区盖设有控制电路板，所述控制电路板与所述流速传感器、所述粉尘检测组件及所述压电气泵电性连接；所述壳体内部装设有固定架，所述固定架用于将所述粉尘检测组件、所述压电气泵固定于所述壳体中，所述固定架与所述控制电路板配合形成所述气流通道。
  5. 根据权利要求4所述的粉尘检测装置，其特征在于，所述壳体外部连接有保护盖，所述保护盖罩设于所述控制电路板。
  6. 根据权利要求4所述的粉尘检测装置，其特征在于，还包括驱动电压判断模块与警示模块，所述驱动电压判断模块与所述警示模块、所述压电气泵的驱动电源相连，所述驱动电压判断模块用于判断所述压电气泵的驱动电压是否大于第一预设值，所述警示装置用于在所述压电气泵的驱动电压大于第一预设值时进行报警动作。
  7. 根据权利要求4～6任一项所述的粉尘检测装置，其特征在于，还包 括空气流速判断模块与驱动电压控制模块，所述空气流速判断模块与所述流速传感器相连，所述驱动电压控制模块与所述压电气泵的驱动电源相连，所述空气流速判断模块用于判断所述气流通道中的空气流速是否大于第二预设值，所述驱动电压控制模块用于在所述气流通道中的空气流速大于第二预设值时降低所述驱动电源的驱动电压。
  8. 根据权利要求7所述的粉尘检测装置，其特征在于，所述空气流速判断模块还用于判断所述气流通道中的空气流速是否小于第三预设值，所述驱动电压控制模块还用于在所述气流通道中的空气流速小于第三预设值时增大所述驱动电源的驱动电压。
  9. 根据权利要求3所述的粉尘检测装置，其特征在于，所述流速传感器包括第一热敏电阻、第二热敏电阻与电压检测模块，所述第一热敏电阻与所述第二热敏电阻串联连接在恒压源电路中，所述电压检测模块用于获取所述第一热敏电阻两端电压或者所述第二热敏电阻两端电压，所述第一热敏电阻与所述第二热敏电阻沿着气流方向依次设置在所述气流通道中。
  10. 根据权利要求3所述的粉尘检测装置，其特征在于，所述流速传感器包括第一热敏电阻、第二热敏电阻、电位器与电压检测模块，所述第一热敏电阻与所述第二热敏电阻串联连接在恒压源电路中，所述第一热敏电阻与所述第二热敏电阻串联连接后与所述电位器的两个固定引线端并联连接，所述电压检测模块用于获取所述第一热敏电阻与所述第二热敏电阻之间的测试端、以及所述电位器的活动引线端之间的电压，所述第一热敏电阻与所述第二热敏电阻沿着气流方向依次设置在所述气流通道中。
PCT/CN2016/105719 2016-10-27 2016-11-14 粉尘检测装置 WO2018076405A1 (zh)

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