HOT-FILM ANEMOMETRY FOR MEASURING LATERAL LINE STIMULI
HOT-FILM ANEMOMETRY FOR MEASURING LATERAL LINE STIMULI
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DOI：
10.1121/1.397867
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发表时间：
1989-05-01
影响因子：
2.4
通讯作者：
JANSSEN, J
中科院分区：
文献类型：
--
作者：
COOMBS, S;FAY, RR;JANSSEN, J
热膜风速仪系统已被校准和评估，用于测量用于刺激硬骨鱼机械感觉侧线系统的正弦水运动。风速计系统对振动球体产生的水运动的响应是在广泛的频率、强度和距离球体的范围内测量的。在10-200赫兹的频率范围内，系统对沿球面振动轴的信号的幅值响应在50-分贝范围内是线性的，动态范围的最低端(在10-8到10-9m之间)对应于斑点海燕(Cottus Bairdi)侧线系统最灵敏的生理指标。测量到的信号衰减与距离在此频率范围内也是线性的，距离为球体半径的6倍(=3 mm)，并遵循偶极源的预测衰减率。风速计系统在包括侧线系统探测范围的宽动态范围内的线性响应，以及在距偶极源不同距离处预测的运动与测量的运动之间的匹配，表明热膜风速测量对于测量可能刺激侧线系统和其他流体动力学探测器的低水平低频信号是一种有用的技术。
A hot-film anemometer system has been calibrated and evaluated for the measurement of sinusoidal water motions used in stimulation the mechanosensory lateral line system of a teleost fish. The response of the anemometer system to water motions created by a vibrating sphere was measured over a wide range of frequencies, intensities, and distances from the sphere. The amplitude response of the system to signals along the axis of sphere vibration was found to be linear over a 50-dB range for frequencies from 10-200 Hz, with the lowest end of the dynamic range (between 10-8 and 10-9 m) corresponding to physiological measures of best sensitivity in the lateral line system of the mottled sculpin, Cottus bairdi. The measured attenuation of the signal with distance was also linear over this frequency range out to distances of six times the radius (= 3 mm) of the sphere and followed the predicted falloff rate for a dipolar source. The linear response of the anemometer system over a wide dynamic range encompassing the detection range of the lateral line system, and the match between predicted and measured motions at varying distances from a dipolar source, indicates that hot-film anemometry is a useful technique for measuring low-level, low-frequency signals likely to stimulate the lateral line system and other hydrodynamic detectors.