共查询到18条相似文献,搜索用时 125 毫秒
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采用热敏电阻作为热源和敏感元件,在密闭腔中使气体产生自然对流,利用硬件电路和软件补偿技术将载体的姿态信号提取并进行处理,从而实现载体在任意偏航方向时与水平面倾斜的全方位姿态测量。研制出测量范围为±45°、非线性度小于0.5%FS、分辨率小于0.01°、响应时间小于50ms的全方位气流式倾角传感器。 相似文献
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采用热敏电阻作为热源和敏感元件,在密闭腔中使气体产生自然对流,利用硬件电路和软件补偿技术将运动载体的姿态信号提取并进行处理。研制出测量范围为±30°、非线性度小于1%FS、分辩率小于0.01°、响应时间小于80 ms的动态气流式倾角传感器。 相似文献
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An optical fiber liquid level sensor based on differential optical absorption is described. The sensor uses a two-wavelength ratiometric approach to cancel out errors arising from variations in fuel characteristics, tank vibrations, etc. The sensor is mechanically simple and uses inexpensive LED sources and multimode optical fiber. The sensor displays ±2-mm resolution over an 18-cm range with immunity to 5° surface tilt variations and immunity to optical fiber connector and bending loss variations up to 1 dB. 相似文献
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《Electron Devices, IEEE Transactions on》1987,34(12):2456-2462
A new silicon-based monolithic pressure-flow sensor has been developed. Its operation is based on the piezoresistive effect for pressure sensing and heat transfer for flow sensing. The sensor chip has a thermal isolation structure that is made of an oxidized porous silicon membrane. This structure thermally isolates the heating element located on the membrane from the rim of the chip. The sensor, in which the chip was mounted on a wall of an acrylate plastic pipe, was designed for biomedical applications. Measurements were made at pressures of 0-300 mmHg, water flow rates of 0-7 1/min, and fluid temperatures of 25-45°C. The temperature difference between the heating element and the fluid temperature sensing element was kept at 5°C. The sensor showed a pressure sensitivity of 1.32 µV/mmHg for 1-mA current supplied, a nonlinearity of 0.5 %F.S. for pressure sensing, an accuracy of ±10 %F.S. for flow sensing, and 90-percent response time of below 100 ms for flow sensing. The sensor was applied to the simultaneous measurements of pressure and flow rate in pulsedflow experimental systems. 相似文献
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In this paper, a new, simple capacitive tilt sensor with a metallic ball is proposed. The proposed tilt sensor has only two electrodes and a metallic ball, and this design assists in managing the inherent contact problem in measuring tilt angles. Capacitive sensing, compared with other types of tilt sensor, has many advantages such as simplicity, noncontact measurement, long‐throw linear displacement, and sub‐micron plate spacing. Its design and fabrication process are significantly simpler than previous types of tilt sensors. The dimensions of the prototype tilt sensor are , and the diameter of the polystyrene tube is 5 mm with a tube thickness of 0.15 mm. An analytical study of the prototype capacitive tilt sensor was undertaken, and the experimental results demonstrate the relationship between the tilt angles and measured capacitances compared with the analytical study. 相似文献