Method and circuit for acquiring output quantity of linear resonance actuator

Patent metadata

Field	Value
Publication number	US-10432125-B2
Application number	US-201715762100-A
Country	US
Kind code	B2
Filing date	Sep 5, 2017
Priority date	Sep 5, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A method and circuit for acquiring an output quantity of a linear resonance actuator are disclosed. The method comprises the steps of: establishing a circuit that simulates the linear resonance actuator by using passive electrical devices according to an electrical parameter and a kinematic parameter of the linear resonance actuator, the passive electrical devices comprise at least a resistor, a capacitor and an inductor; selecting a measuring point in the circuit according to an output quantity that the linear resonance actuator needs; and inputting a driving signal of an input source to an input end of the circuit, and collecting an electrical signal that is outputted at the measuring point to obtain the output quantity of the simulated linear resonance actuator. According to the technical solution of the application, a circuit module or system model that simulates the linear resonance actuator is established and used in the process of developing and debugging of projects, to replace the technical solutions that directly use physical actuators, thereby improving the efficiency and avoiding the relying on physical actuators.

First claim

What is claimed is:

1. A method for acquiring an output quantity of a linear resonance actuator, wherein the method comprises the steps of:
establishing a circuit that simulates the linear resonance actuator by using passive electrical devices according to an electrical parameter and a kinematic parameter of the linear resonance actuator, the passive electrical devices comprise at least a resistor, a capacitor and an inductor;
selecting a measuring point in the circuit according to an output quantity that the linear resonance actuator needs; and
inputting a driving signal of an input source to an input end of the circuit, and collecting an electrical signal that is outputted at the measuring point to obtain the output quantity of the simulated linear resonance actuator;
wherein the step of establishing a circuit that simulates the linear resonance actuator by using passive electrical devices according to an electrical parameter and a kinematic parameter of the linear resonance actuator comprises:
selecting a first resistor and a first inductor according to an electrical parameter of an electrically conducting coil of the linear resonance actuator; and, selecting a capacitor, a second resistor and a second inductor according to an electrical parameter of the electrically conducting coil of the linear resonance actuator and a kinematic parameter of an oscillator; and
connecting the first resistor and the first inductor in series and connecting the capacitor, the second inductor and the second resistor in parallel to establish a first circuit that simulates the linear resonance actuator, wherein one end of the first resistor is connected to an anode end of the input source, one end of the first inductor is connected to a cathode end of the input source, the capacitor, the second inductor and the second resistor are connected in parallel to form a parallel resonance circuit, and two ends of the parallel resonance circuit are connected in series respectively between the other end of the first resistor and the other end of the first inductor;
or, connecting the first resistor and the first inductor in series and connecting the capacitor, the second inductor and the second resistor in series to establish a second circuit that simulates the linear resonance actuator, wherein one end of the first resistor is connected to an anode end of the input source, one end of the first inductor is connected to a cathode end of the input source, the other end of the first resistor is connected to a first input end of a coupler, the other end of the first inductor is connected to a second input end of the coupler, the capacitor, the second inductor and the second resistor are connected in series to form a series resonance circuit, and two ends of the series resonance circuit are connected in series respectively between a first output end and a second output end of the coupler.

2. The method according to claim 1 , wherein the step of establishing a circuit that simulates the linear resonance actuator by using passive electrical devices according to an electrical parameter and a kinematic parameter of the linear resonance actuator further comprises:
setting a resistance value and an inductance value of the electrically conducting coil of the linear resonance actuator respectively as a resistance value of the first resistor and an inductance value of the first inductor; and
obtaining a resistance value of the second resistor, a capacitance value of the capacitor and an inductance value of the second inductor by calculating according to the resistance value and the inductance value of the electrically conducting coil of the linear resonance actuator, an operating current and an operating voltage of the linear resonance actuator, and a resonance frequency and a frequency bandwidth of the oscillator of the linear resonance actuator.

3. The method according to claim 1 , wherein when the circuit that simulates the linear resonance actuator is the first circuit, the step of selecting a measuring point in the circuit according to an output quantity that the linear resonance actuator needs comprises:
selecting one end of the first resistor or one end of the first inductor as a measuring point of a resultant force of the oscillator of the linear resonance actuator;
and/or, selecting the end of the second resistor that is connected to the first inductor as a measuring point of a velocity of the oscillator of the linear resonance actuator;
and/or, selecting the end of the second inductor that is connected to the first inductor as a measuring point of a displacement of the oscillator of the linear resonance actuator;
and/or, selecting the end of the capacitor that is connected to the first inductor as a measuring point of an acceleration of the oscillator of the linear resonance actuator;
and/or, selecting the capacitor as a measuring point of a back electromotive force voltage of the linear resonance actuator; and
when the circuit that simulates the linear resonance actuator is the second circuit, the step of selecting a measuring point in the circuit according to an output quantity that the linear resonance actuator needs comprises:
selecting one end of the second resistor or one end of the second inductor or one end of the capacitor as a measuring point of a resultant force of the oscillator of the linear resonance actuator;
and/or, selecting the second resistor as a measuring point of a velocity of the oscillator of the linear resonance actuator;
and/or, selecting the second inductor as a measuring point of an acceleration of the oscillator of the linear resonance actuator;
and/or, selecting the capacitor as a measuring point of a displacement of the oscillator of the linear resonance actuator;
and/or, selecting the input end of the coupler as a measuring point of a back electromotive force voltage of the linear resonance actuator.

4. The method according to claim 3 , wherein the step of collecting an electrical signal that is outputted at the measuring point to obtain the output quantity of the simulated linear resonance actuator comprises:
connecting a current sensor or a voltage sensor at each measuring point of the circuit;
collecting an electrical signal that is outputted by the current sensor or the voltage sensor; and
obtaining by calculating the corresponding output quantity of the linear resonance actuator according to the electrical signals that are outputted by each measuring point.

5. The method according to claim 4 , wherein the step of obtaining by calculating the corresponding output quantity of the linear resonance actuator according to the electrical signals that are outputted by each measuring point comprises:
calculating an electromagnetic parameter Km according to a length and a magnetic flux density of the electrically conducting coil of the linear resonance actuator;
calculating each conversion coefficient that is corresponding to the electrical signal that is outputted by each measuring point according to the electromagnetic parameter Km and a parameter of the passive electrical device in the circuit; and
obtaining the output quantity corresponding to the linear resonance actuator by calculating a product of the electrical signal that is outputted by each measuring point and the conversion coefficient corresponding to the electrical signal.

6. The method according to claim 5 , wherein when the circuit that simulates the linear resonance actuator is the first circuit, the step of calculating each conversion coefficient that is corresponding to the electrical signal that is outputted by each measuring point according to the electromagnetic parameter Km and a parameter of the passive electrical device in the circuit comprises:
obtaining the conversion coefficient of the electrical signal

Assignees

• Goertek Inc

Inventors

• Feng Yongqiang
• Wu Lide
• Li Bo

Classifications

• G06F30/367 Primary

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

• G06F30/36

  Circuit design at the analogue level · CPC title

• G06F30/00

  Computer-aided design [CAD] · CPC title

• H02P25/032 Primary

  Reciprocating, oscillating or vibrating motors · CPC title

• H02P23/0022 Primary

  Model reference adaptation, e.g. MRAS or MRAC, useful for control or parameter estimation · CPC title