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Conventional measurement methods were based on microscope, which was time-consuming and complex operation. In this paper, the aim of this work was to preliminary study the feasibility of the rapid and precision determination of Dinophysis concentration at the wavelength of 495–1030 nm. The transmittance spectra of algae liquid were obtained by hyperspectral transmittance image system. The region of...
An improved calibration method for a strap-down inertial navigation system (SDINS) is presented here. Calibration accuracy in conventional method is vulnerable to gyro uncertain errors such as random walk, Markov noise and dead band, etc. Earth-rate injection technique is suggested to reduce the calibration errors induced by gyro errors by replacing gyro output measurements with true earth-rate projections...
A calibration method for a strap-down inertial navigation system (SDINS) is presented here. The body-frame drift induced by the variation of the accelerometer sensing axe due to temperature changes is an important source of navigation error not considered in conventional calibration methods. In this paper, we propose an advanced calibration method that can compensate for SDINS error sources including...
An acoustic-optical integrated measurement deep-tow system called J-QUEST (the Japanese quantitative echo sounder and stereo-video camera system), consisting of a quantitative echo sounder and two synchronized cameras, has been developed for the observation of mesopelagic fishes such as lanternfish by the Fisheries Research Agency, Japan. The quantitative echo sounder is designed for measuring fish...
In this paper, a dual-channel pseudo-random signal generator is presented for the calibration of cross-correlators such as cross-correlation-based flowmeters. In this signal generator, the two channels have completely identical hardware structures so that they generate two identical sequences of pseudo-random signals to simulate two signals obtained from the upstream and downstream sensors of a cross-correlator,...
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