Vacuum degree control circuit and control method based on pressure sensor and vacuum box

Abstract

The invention relates to the technical field of sensors, and discloses a vacuum degree control circuit and control method based on a pressure sensor and a vacuum box. The vacuum degree control circuit and control method based on the pressure sensor and the vacuum box comprise a vacuum degree pressure detection module, a communication module, a main control module and a ventilation control module, and a detection signal output end of the vacuum degree pressure detection module is connected with a detection signal input end of the communication module; and a detection signal output end of the communication module is connected with a detection signal input end of the main control module, a control signal output end of the main control module is connected with a control signal input end of the communication module, and a ventilation instruction output end of the communication module is connected with a ventilation instruction input end of the ventilation control module. The control signal is generated according to the detection signal and the preset reference signal, the corresponding ventilation instruction is generated according to the control signal, and the corresponding ventilation electromagnetic valve is switched on according to the ventilation instruction, so that automatic degassing of the vacuum box is realized, and the degassing efficiency of the vacuum box is improved.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a pressure sensor-based vacuum degree control circuit, a control method and a vacuum box. Background technique [0002] Vacuum box is often used for degassing objects with high gas content such as powder or colloid. At present, in the process of degassing the colloid in the vacuum box, the operator is often required to assist in the control beside the equipment, so as to avoid the situation that the colloid overflows due to too large bubbles or the degassing is insufficient due to too small bubbles. Due to the different characteristics of colloids, the degassing time and degassing times usually depend on the actual experience of the operator. The operator can only observe the size of the bubbles with eyes, which makes the auxiliary control have a delay, and the manual operation time is too long to cause control errors, which makes the degassing efficiency of the vacuum box low. ...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a pressure sensor-based vacuum degree control circuit, control method and vacuum box, aiming to solve the technical problem that the vacuum box relies on manual operation in the prior art, making the vacuum box degassing efficiency lower

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