A device for measuring and controlling dew point temperature and its realization method

A dew point temperature, realization method technology, applied in non-electric variable control, humidity control, control/regulation system and other directions, can solve the problems of complicated calculation, difficult controller, complex equation form, etc., to ensure accuracy and reliability, overcome the The effect of cumbersome calculations

Inactive Publication Date: 2019-01-18
BEIHANG UNIV
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Problems solved by technology

However, due to the complex form of the equation, the calculation is cumbersome, and it is irreversible, that is, if the water vapor pressure is known, it is difficult to calculate the temperature value from the Goff-Grech equation, which brings certain difficulties to the corresponding calculation in the controller.

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  • A device for measuring and controlling dew point temperature and its realization method
  • A device for measuring and controlling dew point temperature and its realization method
  • A device for measuring and controlling dew point temperature and its realization method

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Embodiment Construction

[0019] The invention is a device for measuring and controlling dew point temperature, which is characterized in that it includes a main controller, a sensor module, a touch screen, a humidification module, a refrigeration control circuit, a compressor, a heater and the control circuit thereof;

[0020] The sensor module includes a temperature and humidity sensor and an A / D converter; the temperature and humidity sensor is connected to the analog expansion port of the main controller through the A / D converter; the touch screen is bidirectionally connected to the main controller through a communication port;

[0021] The first output terminal of the main controller is connected to the input terminal of the humidification module, the second output terminal of the main controller is connected to the compressor through the refrigeration control circuit, and the third output terminal of the main controller is connected to the heater and control circuits.

[0022] The main controller...

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Abstract

The invention relates to a device for measuring and controlling a dew point temperature and an implementation method thereof. The device comprises a master controller, a sensor module, a touch screen, a humidification module, a refrigerating control circuit, a compressor, a heater and a control circuit of the heater. The sensor module comprises a temperature and humidity sensor and an A / D converter. The implementation method for measuring and controlling the dew point temperature includes a method for measuring the dew point temperature and an implementation method with the dew point temperature as a control target. The implementation method for measuring and controlling the dew point temperature includes the following steps of acquisition, calculation of the dew point temperature, calculation of errors of the dew point temperature, calculation of output of a PI controller and calculation the action time of a humidity execution mechanism. The device for measuring and controlling the dew point temperature and the implementation method thereof have the advantages that dew point temperature measurement precision is high, and the problem that when a humidity set value is the dew point temperature, relative humidity needs to be converted into the dew point temperature, and accordingly measurement precision is affected is solved.

Description

technical field [0001] The invention relates to a device for measuring dew point temperature in a humidity test and taking the dew point temperature as a control object and its realization method, which is suitable for the humidity environment test and belongs to the field of reliability and environmental engineering. Background technique [0002] When the water vapor content in the air is constant and the air pressure is constant, the temperature at which the water vapor in the air reaches saturation by lowering the temperature is called the dew point temperature (T d ), referred to as dew point. When the air pressure is constant, the dew point is only related to the water vapor content in the air. The more water vapor content, the higher the dew point. Therefore, the dew point is also an important physical quantity reflecting the air humidity. The dew point temperature is not easy to measure directly. Moreover, most of the humidity test chambers in the climate environmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/66G05D22/02
CPCG01N25/66G05D22/02
Inventor 吴飒张倩叶建华陈亮
Owner BEIHANG UNIV
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