基于单片机提高超声波分辨力的方法研究

The Research on Improving the Resolution of Ultrasonic flowmeter based on Microchip

超声波流量计研制受到的主要困扰是超声波的分辨力比较低,从而导致仪表的精度较低。本文立足于单片机及其外围器件的新发展,指出了三种提高超声波分辨力的实用方法:一是仅采用高速单片机,二是采用16位单片机与硬件双积分电路构成的双积分时间放大法,三是采用MSP430单片机与高精度时间芯片结合的方法。这三种方法均已通过了实验研究。

The main difficulty of the research on uhrasonic flowmeter is low resolution of ultrasonic, which leads to low precision of the whole meter. In this paper, based on the new development of microchip and peripheral equipments, three applied approaches are introduced for improving the resolution of ultrasonic： first, only adopting high speed microchip; second, adopting dual integral time amplification, which made up of 16 hit mierochip and dual integral circuit; third, adopting MSP430 microchip combine with high precision time IC. These three approaches have been verified by experiments.