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High-temperature variability temperature and humidity environmental test control method and device

A technology for environmental testing and control methods, applied in non-electric variable control, control/regulation systems, and simultaneous control of multiple variables, etc., and can solve problems such as difficulties

Inactive Publication Date: 2010-08-25
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Therefore, to realize the temperature and humidity control problem under the condition of large temperature change rate, there are great difficulties in conventional temperature and humidity control methods.

Method used

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  • High-temperature variability temperature and humidity environmental test control method and device

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Embodiment Construction

[0014] The control method of the high-temperature variable temperature and humidity environment test is to use a high-power heating group to heat in the test chamber to realize the temperature rise process, and use a liquid nitrogen device to inject liquid nitrogen to realize the cooling process; use a steam generator to realize the humidification process, and use a liquid nitrogen device to inject The liquid nitrogen after heating and dehumidification by the heating device realizes the dehumidification process.

[0015] Described method can adopt automatic control mode to realize, and adopted device of the present invention is as figure 1 , figure 2 Shown, comprise test box 18, be located at the temperature and humidity control system in test box 18; Described temperature and humidity control system are made up of programmable logic controller PLC, temperature sensor 16, humidity sensor 17, high-power electric heating group 15, Liquid nitrogen tank 1, steam generator 8, fan...

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Abstract

The invention discloses a high-temperature variability temperature and humidity environmental test control method and a device. In the method, a high-power electric heating group is utilized in a test box to realize the process of temperature rise, liquid nitrogen is infused by a liquid nitrogen device to realize the process of temperature reduction, a steam generating device is used for realizing the process of wetting, and the liquid nitrogen device is used for infusing the liquid nitrogen to realize the process of dehumidification. The device comprises the test box, and a temperature and humidity control system, wherein the temperature and humidity control system consists of a programmable logic controller (PLC), a temperature sensor, a humidity sensor, the high-power electric heating group, the liquid nitrogen device, the steam generating device and a fan. The method and the device can well realize decoupling control between the temperature and the humidity in the test environment under a large temperature variability condition, and can meet the requirements of the temperature and humidity control system of a reliability enhancing test device.

Description

technical field [0001] The invention belongs to artificial environment control technology, and in particular relates to a temperature and humidity control method and device, especially a method and device capable of accurately controlling temperature and humidity under the condition of high temperature variability. Background technique [0002] At present, the known artificial environment temperature and humidity control methods are composed of controllers, measurement circuits, dryers, fans and other executive components, and are mostly used in situations where the temperature and humidity environments such as artificial climate boxes and barns change slowly. But the relationship between temperature and humidity is very close. In a given environment, changes in temperature will affect the humidity; similarly, fluctuations in humidity will also affect the temperature in the environment. Therefore, to realize the temperature and humidity control problem under the condition o...

Claims

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Application Information

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IPC IPC(8): G05D27/02
Inventor 陶俊勇易晓山吴艳陈循郑磊蒋瑜
Owner NAT UNIV OF DEFENSE TECH
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