Control system of acoustic measurement techniques for determining
temperature fields around hot springs on bottom of lake
CAI Yong1，FANG Hui1，JIN Tao1，2，ZHOU Yan3，LIU Hua4
（1. Ocean Research Center of Zhoushan，Zhejiang University，Zhoushan 316021，China；
2. Department of Chemical and Biological Engineering，Zhejiang University，Hangzhou 310000，China；
3. Zhejiang Jinying Food Machinery Co.，Ltd.，Zhoushan 316100，China；
4. State Grid Zhoushan City in Zhejiang Province Electric Power Company，Zhoushan 316021，China）Abstract：Aiming at the problems of the observation in situ for a long time around seafloor hydrothermal vents，the method of acousticwas applied to the temperature field measurement of hot springs on the bottom of the lake. The basis of acoustic method used fortemperature field measurement of hot springs on the bottom of lake by the 16 underwater acoustic transducers was presented. Thefunction and the composition of the sound source signal switch circuit including single-chip microcomputer control module，power module，filter module and driving module were introduced. At the same time，automatic data collection procedures based on the LabVIEW weredeveloped which composed of serial communication module，the signal producing module，data acquisition and storage module.Experimental research was performed to accurately collect various data and exactly rebuild the temperature fields around hot springs onthe floor of Lake Qiezishan，Yunnan. The experimental results show that the control system can be applied to temperature fieldmeasurement detector around hot springs on the bottom of the lake. It also has a good accuracy.
Key words：seafloor；hydrothermal vents；acoustic temperature method；control system；LabVIEW