Transducer protection system and method

Patent metadata

Field	Value
Publication number	US-12563341-B2
Application number	US-202318544351-A
Country	US
Kind code	B2
Filing date	Dec 18, 2023
Priority date	Apr 4, 2023
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

The present invention provides a transducer protection system and method. A transducer module at least comprises a transducer, and a signal source is used for generating a first signal; a protection module is used for predicting an actual displacement and/or temperature of the transducer according to the first signal, an amplification factor of the power amplifier and built-in transducer parameters to generate a prediction result, comparing the prediction result with a preset value to generate an analysis result, and regulating the first signal to form a second signal according to the analysis result; a power amplifier is used for receiving the second signal, and performing power amplification on the second signal to form a driving signal; and the transducer module is used for receiving the driving signal, and at least one transducer in the transducer module can work according to the driving signal.

First claim

What is claimed is:

1 . A transducer protection system, comprising a signal source, a protection module, a power amplifier and a transducer module which are connected in sequence, wherein the transducer module at least comprises a transducer;
the signal source is used for generating a first signal; the protection module is used for predicting an actual displacement and/or temperature of the transducer according to the first signal, an amplification factor of the power amplifier and built-in transducer parameters to generate a prediction result, comparing the prediction result with a preset value to generate an analysis result, and regulating the first signal to form a second signal according to the analysis result; the power amplifier is used for receiving the second signal, and performing power amplification on the second signal to form a driving signal; and the transducer module is used for receiving the driving signal, and at least one said transducer in the transducer module is capable of working according to the driving signal; wherein the transducer protection system further comprises at least one second feedback module; and the second feedback module is used for collecting second voltage and current signals at two ends of the transducer and feeding the second voltage and current signals back to the protection module.

2 . The transducer protection system according to claim 1 , wherein the transducer protection system further comprises a first feedback module; and
the first feedback module is used for collecting a first voltage and current signal at an output end of the power amplifier and feeding the first voltage and current signal back to the protection module.

3 . The transducer protection system according to claim 1 , wherein the transducer protection system further comprises a peripheral circuit;
the power amplifier is connected with the transducer module through the peripheral circuit; and the peripheral circuit is used for processing the driving signal to form at least one sub-driving signal, and inputting the sub-driving signals into the corresponding transducers.

4 . The transducer protection system according to claim 1 , wherein the transducer is a combination of one or more of a speaker, a receiver and a linear motor unit.

5 . A transducer protection method, comprising:
acquiring a first signal; obtaining a prediction result according to the first signal, an amplification factor of a power amplifier and built-in transducer parameters; comparing the prediction result with a preset value to generate an analysis result; regulating the first signal to form a second signal according to the analysis result; performing power amplification on the second signal to form a driving signal; and making at least one transducer in a transducer module work according to the driving signal; wherein the step of obtaining a prediction result according to the first signal, an amplification factor of a power amplifier and built-in transducer parameters specifically comprises: obtaining a predicted voltage applied to the transducer according to the first signal and the amplification factor; and obtaining the prediction result according to the predicted voltage and the built-in transducer parameters; acquiring second voltage and current signals at two ends of the transducer; obtaining real-time parameters of the transducer according to the second voltage and current signals; and correcting the prediction result according to the real-time parameters.

6 . The transducer protection method according to claim 5 , wherein the step of obtaining a prediction result according to the first signal, an amplification factor of a power amplifier and built-in transducer parameters further comprises:
acquiring a first voltage and current signal at an output end of the power amplifier; obtaining real-time parameters of the transducer according to the first voltage and current signal; and correcting the prediction result according to the real-time parameters.

7 . The transducer protection method according to claim 5 , wherein the step of making at least one transducer in a transducer module work according to the driving signal specifically comprises:
processing the driving signal to form at least one sub-driving signal, and inputting the sub-driving signals into the corresponding transducers to drive the corresponding transducers to work.

Assignees

• Aac Tech Nanjing Co Ltd

Inventors

• Lan Ruizhi
• Ye Lijian
• Fu Hongling
• Jiang Yuheng
• Liu Kejia

Classifications

• H03F3/20

  Power amplifiers, e.g. Class B amplifiers, Class C amplifiers (H03F3/26 - H03F3/30 take precedence) · CPC title

• H03G1/0005 Primary

  Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal · CPC title

• H03F2200/03

  the amplifier being designed for audio applications · CPC title

• H03F2200/129

  there being a feedback over the complete amplifier · CPC title

• H03F1/523

  for amplifiers using field-effect devices (H03F1/526 takes precedence) · CPC title