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Ampere type humidity sensing device

A technology for humidity sensing and air humidity, applied in the field of electrochemistry, can solve the problems of nonlinear response signal range, high instrument cost, poor anti-interference and other problems, and achieve the effects of strong anti-interference, simple equipment and convenient production.

Inactive Publication Date: 2007-10-24
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an ampere-type humidity sensing device and its application method, so as to overcome the existing need to use AC signals for measurement, which makes the cost of the instrument relatively high, the equipment is complex, the anti-interference is poor, and the response signal is abnormal. Defects such as linear range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of 1-ethyl-3-methylimidazole bromide

[0042] Under stirring conditions at room temperature, 9.1ml of bromoethane (0.126mol) was slowly added dropwise to 10ml of N-methylimidazole, 24h later, washed with ethyl acetate for 3 times, filtered and dried in vacuum. Reaction equation:

[0043]

Embodiment 2

[0045] Preparation of [1-ethyl-3-methylimidazole][tetrafluoroboric acid] ionic liquid

[0046] Under the condition of room temperature and rapid stirring, the HBF 4 Acid (15.2cm 3 0.116mol) slowly add Ag 2 O mud (13.49g 0.058molAg 2 O dissolves into 50cm 3 In water), stirring quickly. The reaction vessel was wrapped with aluminum foil to prevent light drop. Stir for another 1h until Ag 2 O completely reacted to obtain a colorless solution. 22.24 g 0.116 mol of 1-ethyl-3-methylimidazole inner salt obtained in Example 1 was added to it, stirred at room temperature for 2 hours, filtered and separated. Dry under vacuum at 70°C, and the product is a white liquid. The reaction equation is:

[0047]

Embodiment 3

[0049] Preparation of 1-butyl-3-methylimidazole bromide

[0050] Under stirring conditions at room temperature, 6.46ml n-bromobutane (0.06mol) was slowly dropped into 4.76ml N-methylimidazole, 24h later, washed 3 times with ethyl acetate. Filter and vacuum dry. The reaction equation is:

[0051]

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Abstract

The invention relates to an ampere humidity sensor and a relative check method, based on room temperature ion liquid, which comprises a humidity sensitive element with room temperature ion liquid and electrochemical probe, a signal amplifier circuit, a check circuit, a reference circuit, a gas system, and a display control system, to use the charge current of the humidity sensitive element and the reaction current of the electrochemical probe to detect the humidity. The invention is characterized in that using the room temperature ion liquid as the sensitive part of humidity, using the change of reversal electrochemical property of oxidization reduction couple to detect the humidity of current type. The invention can overcome the defects of prior humidity sensor as bad exchangeable property, high cost, complex device, bad interference resistance, and small response signal linear range, caused by using alternative-current signal, to obtain the advantages as simple structure, low cost, stable property and high sensitivity.

Description

Technical field [0001] The invention belongs to the field of electrochemistry technology, and particularly relates to an ampere-type humidity sensor device and an application method thereof. Background technique [0002] Humidity sensing devices can be divided into capacitive humidity sensing devices (CN1220393A), resistive humidity sensing devices (CN1431489A), weight resonance humidity sensing devices and optical fiber humidity sensing devices (CN1036635A) according to the different detected signals. )Wait. Among them, the measurement of electrical signals has attracted special attention due to its simple working mode and high response sensitivity. However, common resistive or capacitive humidity sensing devices need to use AC signals for measurement, which makes the cost of the instrument relatively high. The current-type sensing device has the advantages of simple equipment, strong anti-interference, and linear response signal. Moreover, conventional current-type sensing devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/403G01N27/26
Inventor 王荣朱国阳
Owner SHANGHAI NORMAL UNIVERSITY
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