US 2021/0202822 A1 · PIEZOELECTRIC SENSING SYSTEM AND PIEZOELECTRIC SENSING CIRCUIT

Abstract

A piezoelectric system comprises a piezoelectric sensor, a voltage stabilizer, a discharger and an operation sensor. The piezoelectric sensor outputs a sensing signal through a sensor output terminal according to a rate of change of pressure. The voltage stabilizer has a positive terminal electrically connecting with the sensor output terminal. The voltage stabilizer receives the sensing signal, stores the energy of the sensing signal, and keeps the voltage of the sensing signal as a constant when the rate of change of pressure is zero. The discharger has a first terminal connecting with the positive terminal, a second terminal coupled to ground, and a control terminal receiving a trigger signal to control the first terminal to conduct with or not conduct with the second terminal. The operation sensor electrically connects to the control terminal for sensing an operation generating the pressure and outputs the trigger signal accordingly.

Claims16

Dependent claims

A piezoelectric sensing system comprising:

a piezoelectric sensor, comprising a sensor output terminal, wherein the piezoelectric sensor outputs a sensing signal through the sensor output terminal according to a rate of change of pressure sensed by the piezoelectric sensor;
a voltage stabilizer, comprising a positive terminal electrically connecting with the sensor output terminal, wherein the voltage stabilizer receives the sensing signal outputted by the piezoelectric sensor, stores an energy of the sensing signal, and keeps a voltage of the sensing signal as a constant when the rate of change of pressure is zero;
a discharger, comprising a first terminal connecting with the positive terminal, a second terminal coupled to ground, and a control terminal configured to receive a trigger signal and controlling the first terminal conducted with or not conducted with the second terminal;
and
an operation sensor, electrically connecting with the control terminal for sensing an operation generating the pressure and outputting the trigger signal according to the operation.

2 more elements

A piezoelectric sensing circuit comprising:

a piezoelectric sensor comprising a sensor output terminal, wherein the piezoelectric sensor outputs a sensing signal through the sensor output terminal according to a rate of change of pressure sensed by the piezoelectric sensor;
a voltage stabilizer comprising a positive terminal electrically connecting with the sensor output terminal, wherein the voltage stabilizer receives the sensing signal outputted by the piezoelectric sensor, stores an energy of the sensing signal, and keeps a voltage of the sensing signal as a constant when the rate of change of pressure is zero;
and
a discharger comprising a first terminal connecting with the positive terminal, a second terminal coupled to ground, and a control terminal configured to receive a trigger signal and controlling the first terminal conducted with or not conducted with the second terminal, wherein the trigger signal is associated with an operation generating the pressure.

1 more element

Dependencies are inferred from the claim text.

Piezoelectric sensing system and piezoelectric sensing circuit

Life of this patent

Piezoelectric sensing system and piezoelectric sensing circuit

Life of this patent

Abstract

Claims16