To the complete character use the image which representation by matrix , making the subtraction between the matrix of capture image and the matrix of template , the result matrix which absolute sum of its all elements is the smallest is the recognition result . to the incomplete character , using two lines of 0 ~ 9 as template , then carry on the recognition using the template matching . to the scale division recognition , using the central position of it , distinguishes the long scale division expression is merely 0 perhaps 5 对完整字符,采用将图像用矩阵表示,利用获取图像的矩阵与识别模板的矩阵做减法,结果矩阵的所有元素绝对值和最小的即为识别结果;对不完整字符,针对电度表读数的具体特点,采用将两行0 ~ 9的字符图像排列起来作为模板,利用模板匹配法进行识别;对于刻度的识别,利用刻度的中心坐标位置,仅仅识别长刻度表示的是0或是5即可。
The input voltage of the piezoresistive transducer , gain , sampling frequency and negative delay can respectively be graded through programming . the stored system is specially designed to have two modes of trigger ( namely , external trigger through wire breakage and inner trigger through overpressure signal ) , reading software and interface circuit that are of 该测试系统可通过编程选择传感器供电电压（两档） 、放大倍数（四种） 、采样频率（四种） 、负延迟（四种） ；同时具有断线外触发和超压信号内触发两种触发方式；读数的软件和接口电路都具有串并兼容特性；系统还具有状态自检和定时上电等功能。
