基于静电换能器的超声波测温系统设计

发布时间：2018-03-07 22:28

  本文选题：超声波测温　切入点：回波前沿　出处：《中国测试》2017年04期 　论文类型：期刊论文

【摘要】：针对超声波测量技术存在难以准确捕捉回波前沿起点的问题,设计基于宽频带、高接收灵敏度的静电换能器的超声测温系统,配合脉冲高压偏置驱动电路,得到前沿明显且易捕捉的回波信号;设计石英玻璃超声波传递通道,采用阈值检测法和钳位电路设计防误触发回波处理电路,提高系统的稳定性;选用高主频单片机STM32F407准确测量超声波传递时间,再以分段线性插值法对系统测温值进行标定。在恒温箱10~58℃的温度范围内将系统测温数据与高精度测温计TSIC506的测温值对比,实验结果表明系统可实现精准测温。
[Abstract]:Aiming at the problem that ultrasonic measurement technology is difficult to accurately capture the starting point of echo front, an ultrasonic temperature measuring system based on wide band electrostatic transducer with high receiving sensitivity is designed, which is combined with pulse high voltage bias drive circuit. The ultrasonic transmission channel of quartz glass is designed, the threshold detection method and the clamp circuit are used to design the anti-misfiring echo processing circuit to improve the stability of the system. The ultrasonic transfer time is accurately measured by STM32F407, and the temperature measurement value of the system is calibrated by piecewise linear interpolation method. The temperature measurement data of the system are compared with those of the high precision thermometer TSIC506 in the temperature range of 1058 鈩，

本文编号：1581256