共查询到15条相似文献,搜索用时 203 毫秒
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提出了一种三丝结构气流式水平姿态传感器.采用有限元方法,利用ANSYS--FLOTRAN CFD软件,通过建模、划分网格、加载和求解等途径,计算了在不同倾斜状态下三丝结构和二丝结构敏感元件内的温度场和流场.计算结果表明,在倾斜状态下,三丝结构在两热源处的气流速度之差要比二丝结构大近5倍.三丝结构使加热丝与检测丝分离,解决了工作电流和输出灵敏度之间的相互矛盾,并可降低工作电流.测试结果表明:三丝结构气流式水平姿态传感器与二丝结构气流式水平姿态传感器相比,灵敏度由10 mV /(°)增大到18mV/(°),响应时间从原来的100 ms降低到40 ms,工作电流由原来的80 mA降低到40 mA.三丝结构优于两丝结构. 相似文献
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提出将气流式水平姿态传感器和角速度陀螺构成补偿回路传感器,通过气流式补偿回路传感器的原理分析和结构设计,陀螺信号消除了干扰加速度对水平姿态传感器信号的干扰,提高了运动载体水平姿态输出信号的精确度。此传感器不仅能进行静态倾角测量,而且能抑制动态情况下加速度对水平姿态传感器输出信号的干扰,使动态水平姿态输出信号也能达到很高的精度,同时还可输出角速度信号。利用单片机对传感器零位电压、灵敏度随温度变化及非线性度进行补偿,能显著提高传感器的线性度,展宽工作温度 相似文献
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水平姿态检测在控制、测量领域发挥着重要作用.实现高精度实时动态检测载体水平姿态既是科技市场的实际需求更是科研工作的挑战,因此设计了高精度动态水平姿态传感器.它主要由微机械倾角传感器、微机械陀螺及其信号处理电路组成,以陀螺来补偿载体行进中带来的各种线加速度干扰,实现移动载体的水平姿态高精度检测.以高精度与实时动态检测为核心,介绍了该系统的总体方案设计,电源转换、敏感信号预处理与模数转换、信号处理及输出的硬件设计和软件处理基本方法,并在设计完成后组装调试.系统测试表明该水平姿态检测系统设计取得预期效果,满足高精度实时动态检测载体水平姿态的设计需求. 相似文献
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对水温表热敏电阻式传感器、空调蒸发器出风口温度传感器、石蜡式气体温度传感器、双金属片式气体温度传感器、热敏铁氧体温度传感器、叶片式空气流量传感器以及测量芯式空气流量传感器的结构、原理与检修进行了讨论。 相似文献
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Wei Zhou Peng Xiao Yun Liang Qiling Wang Depeng Liu Qing Yang Jianhua Chen Yujing Nie Shiao-Wei Kuo Tao Chen 《Advanced functional materials》2021,31(42):2105323
Recently airflow sensors based on mechanical deformation mechanisms have drawn extensive attention due to their favorable flexibility and sensitivity. However, the fabrication of highly sensitive and self-adaptive airflow sensors in a simple, controllable, and scalable method still remains a challenge. Herein, inspired by the wing membrane of a bat, a highly sensitive and adaptive graphene/single-walled nanotubes-Ecoflex membrane (GSEM) based airflow sensor mediated by the reversible microspring effect is developed. The fabricated GSEM is endowed with an ultralow airflow velocity detection limit (0.0176 m s−1), a fast response time (≈1.04 s), and recovery time (≈1.28 s). The GSEM-based airflow sensor can be employed to realize noncontact manipulation. It is applied to a smart window system to realize the intelligent, open, and close behaviors via a threshold control. In addition, an array of airflow sensors is effectively designed to differentiate the magnitude and spatial distribution of the applied airflow stimulus. The GSEM-based airflow sensor is further integrated into a wireless vehicle model system, which can sensitively capture the flow velocity information to realize a real-time direction of motion manipulation. The microspring effect-based airflow sensing system shows significant potentials in the fields of wearable electronics and noncontact intelligent manipulation. 相似文献