Method and device for detecting function of loudspeaker module

摘要

The present invention provides a method and a device for detecting function of a loudspeaker module, belonging to the field of detection technology and being capable of solving the problems of noise interference, inaccurate detection result and high manpower consumption in existing function detection of the loudspeaker module. According to the method and the device for detecting the function of the loudspeaker module in the present invention, a test resistor is adopted to substitute a mode that a loudspeaker is directly connected to a test circuit, so that noise-free and automatic detection of the function of the loudspeaker module is realized.

主权项

1. A method for detecting function of a loudspeaker module, comprising the following steps:
a voltage signal acquisition step, for connecting a test resistor to an interface of the loudspeaker module to form a circuit, and continuously acquiring voltages at two ends of the test resistor respectively within a predetermined time to obtain two groups of voltage signal values V1(t) and V2(t); a voltage difference calculation step, for calculating difference between the two groups of voltage signal values V1(t) and V2(t) to obtain a voltage difference V(t) at the two ends of the test resistor; a current frequency value f and current amplitude A calculation step, for calculating frequency value f and amplitude A of current flowing through the test resistor according to the voltage difference V(t); and a loudspeaker module function judgment step, for calculating differences between the amplitude A and the frequency value f of the current flowing through the test resistor and respective reference values Ab and fb, judging that the function of the loudspeaker module to be detected is normal if the differences are within the ranges of preset error thresholds, otherwise, judging that the function is abnormal.