APPARATUS, COMPUTER PROGRAM PRODUCT AND COMPUTER READABLE MEDIUM USING AUDIO SIGNAL FOR DETECTION AND DETERMINATION OF NARROWING CONDITION OF FLUID PIPE
SUNG, PO HSUN,宋柏勳,宋柏勳,KAN, CHUNG DANN,甘宗旦,甘宗旦,WANG, JIEH NENG,王玠能,王玠能,CHEN, WEI LING,陈维聆,陳維聆
申请号：
TW103134318
公开号：
TWI572327B
申请日:
2014.10.01
申请国别(地区):
TW
年份:
2017
代理人:
摘要：
The present invention provides an apparatus, computer program product and computer readable medium using an audio signal for detection and determination of a narrowing condition of a fluid pipe. An audio signal generated by fluid flowing in a selected pipe is obtained and transformed into a cochlear spectrogram via an auditory-based cochlear transform. The cochlear spectrogram is then transformed into an auditory spectrum flux and an auditory spectral centroid, each a one-dimensional graph, based on both of which, a two-dimensional distribution graph is rendered. Thereafter, the narrowing condition of the selected pipe is determined based on the data distribution in the two-dimensional distribution graph. For instance, the data distribution is compared to a benchmark data distribution in a two-dimensional distribution graph generated for fluid flowing in a normal pipe.本發明關於一種利用音頻訊號判斷流體管路窄化的檢測裝置、電腦程式產品及電腦可讀取媒體。首先取得一流體在一待測管路內之一音頻訊號,以及將該音頻訊號透過一人耳聽覺模型轉換,成為一三維耳廓頻譜圖,再將該三維耳廓頻譜圖轉換為一聽覺頻譜通量圖與一聽覺頻譜質心圖,並以二者各為一維度繪製為一二維分布圖,之後可根據該二維分布圖的數據分布狀況判斷該待測管路的窄化程度,例如可取得流體在一正常管路內流動的二維分布圖作為基準,進行比對。
