Method and apparatus for simulating the generated charge profile of piezoelectric elements due to arbitrary shock loading

Patent metadata

Field	Value
Publication number	US-10853549-B2
Application number	US-201715659548-A
Country	US
Kind code	B2
Filing date	Jul 25, 2017
Priority date	Jul 26, 2016
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A piezoelectric open-circuit output voltage profile simulator including a capacitor; at least first, second and third switches; and a controller for controlling the first, second and third switches.

First claim

What is claimed is:

1. An open-circuit output voltage profile simulator comprising:
a piezoelectric power source configured to provide an open-circuit output voltage;
a first capacitor;
at least first, second and third switches;
a controller for controlling the first, second and third switches,
a second capacitor couplable in parallel to the first capacitor under control of the second switch;
a first resistor coupled in series between the first and second switches; and
a second resistor coupled in series between the second and third switches;
wherein the first capacitor is coupled to the power source through the first switch to control a charge profile of the simulator, and
wherein the second and third switch are coupled to the first capacitor to control a discharge profile of the simulator.

2. The simulator of claim 1 , wherein the third switch controls coupling of the second resistor in parallel with the second capacitor.

3. The simulator of claim 2 , wherein the power source, the first and second capacitors, the first and second resistors, and the least first, second and third switches comprise a first open-circuit voltage profile generator, the simulator comprising at least one second open-circuit voltage profile generator couplable in parallel with the first open-circuit voltage profile generator under control of the controller.

4. The simulator of claim 1 , wherein the first resistor comprises a plurality of first resistors selectively couplable in parallel at least in pairs under control of the controller.

5. The simulator of claim 1 , wherein the second resistor comprises a plurality of second resistors selectively couplable in parallel at least in pairs under control of the controller.

6. The simulator of claim 1 , wherein at least one of the first and second resistors comprise a plurality of resistors selectively couplable in parallel at least in pairs under control of the controller.

7. The simulator of claim 6 , wherein the power source, the first and second capacitors, the first and second resistors, and the least first, second and third switches comprise a first open-circuit voltage profile generator, the simulator comprising at least one second open-circuit voltage profile generator couplable in parallel with the first open-circuit voltage profile generator under control of the controller.

8. The simulator of claim 1 , comprising a resistive discharge path couplable to the first capacitor under control of the second and third switches to provide the discharge profile of the simulator.

9. The simulator of claim 1 , wherein the power source, the first capacitor, and the least first, second and third switches comprise a first open-circuit voltage profile generator, the simulator comprising at least one second open-circuit voltage profile generator couplable in parallel with the first open-circuit voltage profile generator under control of the controller.

10. The simulator of claim 1 , wherein at least one of the at least first, second and third switches comprises an N-MOSFET.

11. The simulator of claim 1 , wherein at least one of the at least first, second and third switches comprises a P-MOSFET.

12. The simulator of claim 1 , wherein at least one of the at least first, second and third switches comprises a pair of N-MOSFETs.

13. An open-circuit output voltage profile simulator comprising:
a piezoelectric power source configured to provide an open-circuit output voltage;
a first capacitor;
at least first, second and third switches;
a controller for controlling the first, second and third switches, and
a resistive discharge path couplable to the first capacitor under control of the second and third switches to provide the discharge profile of the simulator;
wherein the first capacitor is coupled to the power source through the first switch to control a charge profile of the simulator,
wherein the second and third switch are coupled to the first capacitor to control a discharge profile of the simulator, and
wherein the resistive discharge path comprises a resistor coupled in series between the first and second switches.

14. An open-circuit output voltage profile simulator comprising:
a piezoelectric power source configured to provide an open-circuit output voltage;
a first capacitor;
at least first, second and third switches;
a controller for controlling the first, second and third switches, and
a resistive discharge path couplable to the first capacitor under control of the second and third switches to provide the discharge profile of the simulator;
wherein the first capacitor is coupled to the power source through the first switch to control a charge profile of the simulator,
wherein the second and third switch are coupled to the first capacitor to control a discharge profile of the simulator, and
wherein the resistive discharge path comprises a resistor coupled in series between the second and third switches.

Assignees

• Feng Ziyuan
• Omnitek Partners Llc

Inventors

• Feng Ziyuan

Classifications

• G06F30/367 Primary

  Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods · CPC title

• H02N2/181 Primary

  Circuits; Control arrangements or methods · CPC title

• H01L41/042

  Electricity · mapped topic

• H01L41/1132

  Electricity · mapped topic

• H10N30/802

  Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits · CPC title