Device and method for calibrating humidity switch

Abstract

The invention discloses a device and a method for calibrating a humidity switch. The device comprises a standard humidity sensor, a humidification part, a dehumidification part, a direct-current motor, a gearbox, a mechanical arm and a controller. When the controller detects the connection switching between the humidification part and the dehumidification part of a to-be-calibrated humidity switch, the controller acquires the current humidity value transmitted from the standard humidity sensor. After that, the direction and the angle of the rotation speed of the direct-current motor are controlled based on the positive and negative difference between the current humidity value and a preset humidity value, and the difference value between the current humidity value and the preset humidity value. Furthermore, the knob of the humidity switch can be adjusted by means of the mechanical arm. The device for calibrating the humidity switch adopts the centralized design, and all parts of the device are controlled by the controller in the unified manner. Compared with the manual calibration manner, based on the automatically acquired humidity operating value of the to-be-calibrated humidity switch, namely the value relationship between the current humidity value transmitted from the standard humidity sensor and the preset humidity value, the to-be-calibrated humidity switch is calibrated. The entire calibration process is automatically conducted.

Description

technical field [0001] The invention relates to the technical field of device calibration, and more specifically, to a humidity switch calibration device and method. Background technique [0002] Humidity switch is a switch instrument with moisture-sensitive material as its component. When the humidity switch is working normally, its contacts are in the closed / open state. When the ambient humidity rises to the preset humidity value of the humidity switch, the humidity sensor will The material moves due to the force, and the contact is opened / closed, thereby breaking / connecting the circuit; when the ambient humidity drops to the preset humidity value, the contact is automatically closed / opened, so that the humidity switch returns to the normal working state. [0003] Humidity switches are widely used in electrical equipment, especially in electrical equipment that requires high humidity. Since the humidity switch has different requirements for the preset humidity value in di...

AI Technical Summary

Problems solved by technology

However, manual calibration has problems such as large calibration error, high labor intensity, and low calibration efficiency.

Images