CAJ | 학술논문

为了实现对固体表面运动速度的高精度测量，建立了一套基于线阵图像传感器的新型空间滤波测速仪系统，提出了一种确定系统误差来源的新方法。图像传感器在系统中既作为探测器又作为空间滤波器使用，系统结构得到了很大的简化。在理论上对线阵图像传感器的空间滤波特性进行了分析，并设计了图像传感器的驱动电路、信号采集和预处理电路。测量了由高精度转台作为主动轮的传送带速度和日光灯的发光频率。实验结果表明，传送带速度测量精度在0.77%以内，11 min内的测量不确定度为0.66%；而在不使用成像系统的条件下直接测量日光灯的发光频率时，测量不确定度在0.056%以内，提高了一个数量级。总之，该测速仪能够基本满足传送带表面运动速度测量的实时、非接触、稳定和高精度等要求。
위료실현대고체표면운동속도적고정도측량，건립료일투기우선진도상전감기적신형공간려파측속의계통，제출료일충학정계통오차래원적신방법。도상전감기재계통중기작위탐측기우작위공간려파기사용，계통결구득도료흔대적간화。재이론상대선진도상전감기적공간려파특성진행료분석，병설계료도상전감기적구동전로、신호채집화예처리전로。측량료유고정도전태작위주동륜적전송대속도화일광등적발광빈솔。실험결과표명，전송대속도측량정도재0.77%이내，11 min내적측량불학정도위0.66%；이재불사용성상계통적조건하직접측량일광등적발광빈솔시，측량불학정도재0.056%이내，제고료일개수량급。총지，해측속의능구기본만족전송대표면운동속도측량적실시、비접촉、은정화고정도등요구。
In order to realize the velocity measurement of moving solid- surface, a novel spatial filtering velocimeter based on linear image sensor was established and a new method was proposed to ensure the error source of the system. The image sensor was employed both as a detector and as a pair of differential spatial filters so that the system was simplified. The spatial filtering characteristics of the linear image sensor were investigated theoretically and the driving circuit and the signal acquiring and preprocessing circuit were designed. The velocity of a conveyor belt using a high- precision turn table as the driving wheel and the radiating frequency of a lamp were measured. The experimental results show that the measurement error of velocity of conveyor belt was within 0.77% and the measurement uncertainty within 11 minutes was 0.66%; the radiating frequency of a lamp was measured under the condition of no imaging system, and the measurement uncertainty turned out to be 0.056%, which was an order better. In a word, the velocimeter can satisfy the requirements of non- contact, real- time, high precision and high stability velocity measurement of a conveyor belt.