Special experimental laboratory humiture measuring and controlling device and method

Abstract

The invention discloses a device and method used for measuring and controlling the temperature and humidity in special laboratories; a temperature and humidity sensing module converts a temperature and humidity signal into an electric signal and transmits the electric signal to a signal conditioning circuit; the conditioned signal is collected by a multifunctional data collecting card and enters a computer; the computer filtrates the collected electric signal of the temperature and humidity value and converts the electric signal into corresponding temperature and humidity value, corresponding curves of the temperature and humidity value are displayed on a display and the data is memorized in a hard disk, meanwhile, a control signal is generated according to the given temperature and humidity value; the control signal is then sent to a control output circuit by the digital / analog conversion of the multifunctional data collecting card; the control output circuit outputs different commands to corresponding execution mechanisms which comprise a fan, an electric drier and a humidifier. The device and method of the invention have low cost, simple measurement and control method, high precision, easy operation and realization, intuitive display of measuring and controlling results on the computer screen, more convenient operation of various traditional testing instruments by software, and easily realizing the function extension.

Description

technical field [0001] The invention belongs to the field of electronic technology. Background technique [0002] Laboratory equipment has its own temperature and humidity requirements, especially for some precision instruments or special industries. Their laboratories have higher requirements for temperature and humidity. All technical indicators have a great influence. The temperature and humidity measurement and control of these special laboratories is a necessary work for special laboratories to carry out scientific experiments. The traditional test and control is based on the single-chip microcomputer. According to different humidity requirements, different adjustment final states can be set through the hardware. The humidity in the experimental space was adjusted to the set value. Usually, instruments such as thermometers and hygrometers and electrical measurement and control instruments that output analog quantities are used to measure and control data, and the temp...

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