Abstract: Disclosed is an acoustic method for precisely controlling and metering manual injection. The method includes: rotating a main housing to allow ratchet grooves to collide with ratchets on a ratchet wheel; obtaining collision voice and vibration signals by a switch sensor and a perception sensor; performing a Mel-frequency cepstral coefficient (MFCC) algorithm and classification with deep neural networks (DNN) on signals detected by a voice sensor, to output processed and recognized voice features; performing an empirical mode decomposition (EMD) algorithm and classification with cyclic delay diversity (CDD) on signals detected by a vibration sensor, to output processed and recognized vibration signals; and inputting the output voice features, the vibration signals, and reception time differences between the voice signals and the vibration signals into a support vector machine (SVM) classifier jointly for final recognition and classification, to recognize whether manual injection is correctly performed.

Abstract: Disclosed is an acoustic method for precisely controlling and metering manual injection. The method includes: rotating a main housing to allow ratchet grooves to collide with ratchets on a ratchet wheel; obtaining collision voice and vibration signals by a switch sensor and a perception sensor; performing a Mel-frequency cepstral coefficient (MFCC) algorithm and classification with deep neural networks (DNN) on signals detected by a voice sensor, to output processed and recognized voice features; performing an empirical mode decomposition (EMD) algorithm and classification with cyclic delay diversity (CDD) on signals detected by a vibration sensor, to output processed and recognized vibration signals; and inputting the output voice features, the vibration signals, and reception time differences between the voice signals and the vibration signals into a support vector machine (SVM) classifier jointly for final recognition and classification, to recognize whether manual injection is correctly performed.