Method and device for detecting vibration displacement of loudspeaker voice coil and loudspeaker individual

Abstract

The invention discloses a method and a device for detecting vibration displacement of a loudspeaker voice coil and a loudspeaker individual. The method comprises the following steps: when the voice coil is in a balance position, detecting the capacitance value of a capacitor consisting of a magnetic path system between the voice coil and a loudspeaker, and wherein the capacitance value serves as a first capacitance value; when the voice coil is vibrated to another position, detecting the capacitance value of the capacitor, wherein the capacitance value serves as a second capacitance value; when the voice coil is in the other position and the balance position, detecting height difference corresponding to the magnetic path system; when the voice coil is vibrated a the current position, detecting the capacitance of the capacitor, wherein the capacitance value serves as a current capacitance value; according to the first capacitance value, the second capacitance value, the height difference and the current capacitance value, calculating to obtain the vibration displacement of the voice coil. The method has the advantages that by detecting the capacitance value of the capacitor formed between the voice coil and the magnetic path system in real time, the vibration displacement of the voice coil is monitored; the implementing is easy, and the polarization and distortion caused by vibration unbalance can be avoided.

Description

technical field [0001] The invention relates to the field of loudspeakers, and more specifically, the invention relates to a method and device for detecting the vibration displacement of a voice coil of a loudspeaker and a single loudspeaker. Background technique [0002] In the era of mobile Internet, consumer electronics products are becoming more and more popular, and a large number of smart devices appear in people's daily life. Loudspeakers are widely used in consumer electronics as a sound-generating device. At present, the common speakers mainly include dynamic speakers, electromagnetic speakers, capacitive speakers, piezoelectric speakers, etc. Dynamic speakers have the characteristics of relatively simple production, low cost, and good low-frequency sound advantages. be widely used. However, under the trend of thinner equipment and higher power, the output power of the power amplifier to the speaker is getting higher and higher, and the vibration displacement of t...

AI Technical Summary

Problems solved by technology

[0009] The processing technology of the ball top containing the electret layer is complicated and difficult to realize;

[0010] The process of wiring from the electret layer is complex and the production cost is high;

[0011] Electret layer leads cause the top of the ball to vibrate unbalanced, creating polarization and additional distortion

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