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Portable formaldehyde detection system and formaldehyde detection method

A detection system and detection method technology, applied in the field of environmental detection, can solve the problems of long calibration time and inconvenient use, and achieve the effects of sensitive response, improved detection accuracy, and reduced calibration time and detection time.

Inactive Publication Date: 2017-03-29
海南经贸职业技术学院 +1
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Problems solved by technology

[0003] In the traditional formaldehyde detection method based on electrochemical sensors, it takes too long to calibrate the detection system at the beginning of the detection, which takes 3-8 minutes, which is inconvenient to use

Method used

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  • Portable formaldehyde detection system and formaldehyde detection method

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, the present invention will be described in further detail

[0020] figure 1 A portable formaldehyde detection system according to the present invention is schematically shown. As shown in the figure, the portable formaldehyde detection system includes a body 1, a display 2, a switch 3, a reset button 4, a calibration button 5, a microprocessor 6, a power supply 7, a sensor tray 8, and a sensor 9. Display 2, reset button 4, calibration button 5, microprocessor 6, power supply 7, sensor tray 8 are set in body 1, sensor 9 is embedded on sensor tray 8, sensor tray 8 can be pulled out from body 1 freely and Intake; power supply 7, sensor 9, microprocessor 6, display 2 are circuit connected in turn.

[0021] The processor is STM8500, and the sensor is an electrochemical gas sensor

[0022] When measuring the formaldehyde gas concentration, turn on the switch 3 to make the circuit conduction, the power supply 7 starts to suppl...

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Abstract

The invention is suitable for a gas sampling and detecting technology, and provides a portable formaldehyde detector. The portable formaldehyde detector comprises a shell, a display screen, a control key, a pulling type sensor bearing supporting piece are arranged on the shell, the shell is internally provided with a control circuit, a power supply, a sensor and a display screen; the control circuit comprises a microprocessor, an amplification circuit, an A / D switching circuit, an I / V switching circuit which are in point connection; the sensor adopts an electrochemical sensor, and the electrochemical sensor has the advantages of being convenient to use, high in stability, high in sensitivity and low in cross sensitivity; when formaldehyde gas exists in air, the sensor converts the content of the formaldehyde gas in the air into a recognizable electric signal, the electric signal obtained through detection is subjected to processing such as amplification and sampling and transmitted to the microprocessor, the detection result is subjected to optimizing process through a certain software optimization algorithm, the measurement result is displayed on the display screen, and the portable formaldehyde detector is high in sensitivity and simple and convenient in measurement method.

Description

technical field [0001] The invention relates to the field of environmental detection, in particular to a formaldehyde detection system and a rapid formaldehyde detection method for detecting the concentration of formaldehyde in the air. Background technique [0002] Formaldehyde is a colorless gas with a strong pungent smell. It is a common hazard in human life and has been identified as a suspected carcinogen by the World Health Organization (WHO). There are many sources of formaldehyde in people's lives, mainly interior decoration and furniture, especially the use of various new building materials and decorative materials, which has caused the problem of indoor air pollution to become increasingly serious. In my country's indoor air quality monitoring standards, formaldehyde is listed as a must-test item. When the formaldehyde concentration reaches 0.06-0.07mg / m per cubic meter of air, susceptible people such as children will have mild asthma; when the formaldehyde concen...

Claims

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Application Information

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IPC IPC(8): G01N27/26
Inventor 卜毅男刘麦王栖
Owner 海南经贸职业技术学院
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