Low-power underwater turbidimeter system

YE Yan-lei， YANG Li-kun， YE Bing， QIN Hua-wei
（Department of Mechanical Engineering， Hangzhou Dianzi University， Hangzhou 310018， China）

Abstract： Aiming at the requirement of turbidity collecting underwater for a long time，a kind of underwater-low power consumption-turbidity measuring system was developed. Through the analysis and comparison of different methods of turbidity measurement，scattering method was selected for turbidity measurement principle. Based on MSP430F149 core micro-controller chip，the outer part also was designed elaborately，and the performance of low power was realized. The equipment must be working well in the high pressure as the work environment is 0~6 000 m underwater，so the probe and shell were designed as sealed and be able to resist pressure. The turbidity was calibrated through contrasting the result of different concentrations of kaolin-turbidity liquid that this instrument measures with WT-RCOT turbidity instrument. In the Qiantang River，a lot of dates were collected by this instrument，and the turbidity curve was protracted. The results indicate that the turbidity meter system has low power consumption，high compressive strength，high sealing performance，and it is able to collect turbidity data offline underwater for a long time.
Key words： turbidimeter；scattering method； low power consumption； MSP430F149