Multi-closed-loop temperature and humidity control system for mechanically testing micro-cavity environment

Abstract

The invention belongs to the field of material mechanical property testing, and discloses a multi-closed-loop temperature and humidity control system for mechanically testing a micro-cavity environment, which mainly comprises a gas source device, a humidifying device, a gas mixing device, an anti-condensation device and a control device. The gas source device provides dry gas, the humidifying device guarantees moisture output, the gas mixing device accurately controls the dry-wet ratio, and the mixed gas is introduced into a temperature and humidity environment box through the anti-condensation device. Meanwhile, the control device realizes accurate control of four-core multi-closed-loop temperature and humidity through four control electric meters and relays, and ensures dual accurate regulation and control of output mixed gas and the temperature and humidity environment box. The gas mixing device prevents moisture from condensing after entering the gas mixing device, and the anti-condensation device prevents condensation in the gas conveying process. The system has the advantages of being high in response speed, low in power consumption, high in stability, high in precision and the like, the temperature and humidity of dry and wet gas can be regulated and controlled on line, and performance research of materials under different working condition environments can be carried out by combining the system with a mechanical testing machine.

Description

technical field [0001] The invention belongs to the field of material mechanical performance testing, and in particular relates to a temperature and humidity standard measuring device. Background technique [0002] The regulation and measurement of temperature and humidity are the key parts in the process of material mechanics experiment. In order to simulate the different working conditions of materials in the mechanical performance test, the multi-closed-loop control temperature and humidity generator has very important research value. Humidity generators that have been developed so far are generally based on dual-pressure method, dual-temperature method, osmosis method, and shunt method to carry out the humidity ratio, while the shunt method humidity generator has high reliability, high accuracy, and small size. It is widely used in field environment and laboratory due to its relatively simple structure. [0003] However, the existing humidity generators have the followi...

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Problems solved by technology

[0004] The present invention aims to solve the technical problem that the existing temperature and humidity generators cannot accurately control the temperature and humidity, and provides a multi-closed-loop temperature and humidity control system for mechanical testing of micro-cavity environments, which has fast response speed and low power consumption , high stability, high precision, excellent repeatability, etc., combined with multi-closed-loop temperature and humidity control and anti-condensation design, without the need for a host computer, to achieve online control of the temperature and humidity of dry and wet gases, combined with mechanical testing machines to meet different working conditions of materials performance study under

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