Control method and drive circuit

Abstract

The present invention relates to a control method, which is applicable to a driving circuit, wherein the driving circuit drives a piezoelectric actuator of a piezoelectric actuation pump, so that the piezoelectric actuation pump drives a fluid storage chamber to deliver fluid, and the control method includes the following steps: (a ) start the driving circuit, so that the driving circuit outputs the driving voltage; (b) start the drawing operation, and adjust the drawing capacity, so as to detect the fluid pressure of the fluid in the fluid storage chamber in real time, and compare the fluid pressure with the preset drawing pressure for comparison As a result, adjust the driving voltage to adjust the fluid pressure to be equal to the preset suction pressure; and (c) start the discharge operation, and perform discharge capacity adjustment to detect the fluid pressure in real time, and compare the body pressure with the preset discharge pressure, based on the comparison result Adjust the driving voltage so that the fluid pressure is adjusted to be equal to the preset discharge pressure. The invention also relates to a driving circuit.

Description

【Technical field】 [0001] The present invention relates to a control method, in particular to a control method suitable for a drive circuit of a piezoelectric actuated pump and the drive circuit thereof. 【Background technique】 [0002] When the piezoelectric actuated pump is in operation, a driving circuit is required to drive a piezoelectric actuator of the piezoelectric actuated pump, so that the piezoelectric actuator operates periodically, and then drives the piezoelectric actuated pump to operate correspondingly. [0003] The operation mode of the current drive circuit is to provide a fixed voltage to the piezoelectric actuator of the piezoelectric actuator pump at a fixed operating frequency when it is turned on, and to stop the operation to stop the output voltage when it is turned off. It can be seen from the above that the current drive circuit can only control its activation state / off state and the maintenance time of the activation state, so although it is easier t...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a control method suitable for the drive circuit of the piezoelectric actuated pump and the drive circuit thereof, wherein the control method is to detect the current pressure value of the fluid pressure in the fluid storage chamber, and compare the fluid pressure according to the detection result and the preset pressure, so as to adjust the voltage value of the drive voltage output by the drive circuit according to the comparison result, so that the fluid pressure can be adjusted to be equal to the preset pressure, so as to solve the problem that the traditional drive circuit cannot respond to piezoelectric actuated pumps with different performances. The desired driving conditions, and the piezo-actuated pump requires the additional use of a fluid valve control switch to control the pressure of the fluid to maintain a specific value at a specific time, etc. Missing

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