Control method and drive circuit

Abstract

The invention relates to a control method which is suitable for a drive circuit. The drive circuit drives the piezoelectric actuator of a piezoelectric actuating pump so that the piezoelectric actuating pump is enabled to drive a fluid storage chamber to convey fluid. The control method comprises the following steps that (a) the drive circuit is started so that the drive circuit is enabled to output drive voltage; (b) drawing operation is started and drawing capacity adjustment is performed so as to timely detect the fluid pressure of the fluid in the fluid storage chamber, the fluid pressure is compared with the preset drawing pressure, the drive voltage is adjusted according to the comparison result and the fluid pressure is adjusted to be equal to the preset drawing pressure; and (c) discharge operation is started and discharge capacity adjustment is performed so as to timely detect the fluid pressure, the fluid pressure is compared with the preset discharge pressure, the drive voltage is adjusted according to the comparison result and the fluid pressure is adjusted to be equal to the preset discharge pressure. The invention also relates to the drive circuit.

Description

[0001] 【Technical field】 [0002] 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. [0003] 【Background technique】 [0004] 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. [0005] 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...

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Problems solved by technology

[0009] 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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