Intelligent indoor gas formaldehyde concentration measuring apparatus

An indoor gas and concentration measurement technology, which is applied in color/spectral characteristic measurement, instrumentation, temperature control, etc., can solve the problems of manual operation and low degree of automation, achieve smooth and stable signals, improve detection sensitivity, and reduce air sampling volume Effect

Inactive Publication Date: 2010-01-13
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
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Problems solved by technology

At present, the degree of automation of formaldehyde testing instruments in the market is still not high, and a large

Method used

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  • Intelligent indoor gas formaldehyde concentration measuring apparatus
  • Intelligent indoor gas formaldehyde concentration measuring apparatus
  • Intelligent indoor gas formaldehyde concentration measuring apparatus

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Embodiment Construction

[0048] Such as figure 1 As shown, the formaldehyde concentration measuring device of the present invention is composed of an air sampling unit, a color developing unit, a pipetting system, a colorimetric system and a microprocessor control system. The structure of the chromogenic unit is as Figure 8 shown. The color development unit samples the stepper motor 17, the rotating shaft 37 of the stepper motor 17 is connected with the test tube clamp 38, the test tube clamp 38 clamps the color reaction test tube 5, and the color reaction test tube 5 is placed in the color development chamber 35 surrounded by pentahedrons A ceramic heating plate 6, 7 is respectively installed on a group of opposite inner walls of the color chamber 35, and the temperature sensor 36 is installed on the inner wall of the color chamber near the color reaction tube 5.

[0049]A measuring solution containing an absorbent is placed in the formaldehyde absorption tube 3 in advance, and the air sampler 1 c...

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Abstract

The invention provides an intelligent apparatus that has the advantages of simple operation, short measurement time and high sensitivity and that can measure the indoor gas formaldehyde concentration accurately. The intelligent indoor gas formaldehyde concentration measuring apparatus comprises: an air sampling unit, a color developing unit, a liquor relief unit, a color comparison unit and a control unit. The formaldehyde concentration measuring apparatus integrates air sampling, formaldehyde absorption, liquor relief, color development reaction, color development reaction temperature control and color comparison pool together, adopts a low power consumption single-chip machine to control the implementation of all procedures, so that the whole test process can be completed by pressing one button after the apparatus is powered on, no manual operation is needed; a folding multi-optical path is introduced into the formaldehyde concentration measuring apparatus so as to increase the sensitivity of the measurement, reduce the air sampling amount and further shorten the test period.

Description

1. Technical field [0001] The invention designs a photometric measuring device, in particular a formaldehyde concentration measuring device for indoor gas, belonging to a spectrophotometric analysis device. 2. Background technology [0002] Formaldehyde is a colorless gas with a strong pungent odor, and has been identified as a suspected carcinogen by the World Health Organization. People are easily exposed to formaldehyde in daily life, and interior decoration is the main source of formaldehyde in indoor air. In my country's indoor air quality monitoring standards, formaldehyde has been listed as a must-test item. The study of fast and accurate detection of formaldehyde concentration in the environment has important practical significance. Formaldehyde monitoring methods mainly include photometric colorimetry, electrochemical methods, chromatographic analysis methods, test paper photoelectric photometry, etc. According to different detection methods, various types of for...

Claims

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Application Information

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IPC IPC(8): G01N21/31G05B19/042G05D23/20
Inventor 肖韶荣张波
Owner NANJING UNIV OF INFORMATION SCI & TECH
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