six-degree-of-freedom sensor fish design and instrumentation鱼six-degree-of-freedom传感器设计和仪器.pdfVIP

Sensors 2007, 7, 3399-3415 sensors ISSN 1424-8220 c 2007 by MDPI /sensors Full Paper Six-Degree-of-Freedom Sensor Fish Design and Instrumentation Zhiqun Deng , Thomas J. Carlson, Joanne P. Duncan and Marshall C. Richmond Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352 E-mail: zhiqun.deng@ Author to whom correspondence should be addressed. Received: 27 November 2007 / Accepted: 18 December 2007 / Published: 19 December 2007 Abstract: Fish passing through dams may be injured or killed despite advances in turbine design, project operations and other fish bypass systems. The six-degree-of-freedom (6DOF) Sensor Fish device is an autonomous sensor package that characterizes the physical conditions and physical stresses to which fish are exposed when they pass through complex hydraulic environments. It has been used to identify the locations and operations where conditions are severe enough to injure or kill fish. During the design process, a set of governing equations of motion for the Sensor Fish was derived and simulated to understand the design implica- tions of instrument selection and placement within the body of the device. The Sensor Fish package includes three rotation sensors, three acceleration sensors, a pressure sensor, and a temperature sensor with a sampling frequency of 2,000 Hz. Its housing is constructed of clear polycarbonate plastic. It is 24.5 mm in diameter and 90 mm in length and weighs about 43 g,