智舌高频正弦包络信号对椰汁的区分辨识研究

The discrimination of the quality of coconut milk by Smartongue based on high-frequency sinusoidal envelope signal

借助LabVIEW虚拟仪器系统,将激发频率为1、10、100 Hz正弦包络信号提升为1 000 Hz^10 000 Hz,采集频率为1.25 MHz。利用该信号,以四种味觉物质为对象进行区分辨识,相比1、10、100 Hz低频信号,有明显的区分效果。对6种不同市售品牌椰子汁品质区分实验证实,高频正弦包络信号通过频率提升,检测时间大幅减少,有效提高了智舌工作效率,更加符合现代快速检测理念。

LabVIEW virtual instrument system was used to enhance the excitation frequency of sinusoidal envelope signal from 1,10,100 Hz to 1 000 Hz-10 000 Hz,the acquisition frequency to 1.25 MHz.Compared with low-frequency signals of 1,10,100 Hz,four kinds of taste substances could be identified clearly by the signal.The quality distinction of six different commercially available brand of coconut milk experiment had been confirmed that to increase frequency could significantly reduce the detection time and improve the work efficiency of Smartongue,which was in line with the concept of modern rapid detection.