Abstract Torque and rotational speed are important parameters to characterize the power of rotating parts for mechanical systems, so a rotational shaft’s torque and rotational speed sensing method and real-time signal processing are key technologies for mechanized equipment, such as vehicles, ships, etc. Hence an advanced torque and speed sensing technology and a data processing technology are very important for improving the performance of mechanical equipment. However, the power transmission device’s rotational shaft has a compact structure and narrow space, so it is difficult to install a signal transmission and power supply device of a sensor on the rotational shaft. To solve these difficult problems, this paper proposes a rotational shaft torque and rotational speed measurement method coupling resistance and capacitance. This method uses two resistance strain gauges and a capacitive grating, and the capacitive grating transmits signals in a non-contact coupling manner. The sensor on the rotational shaft needs no power supply and the signals are transmitted to a measurement circuit from a stationary sleeve, so this method essentially solves the difficult problems in signal transmission and power supply. Simulation and measurement experiments show that the resistance strain gauges obtain information and the capacitive grating sensor transfers information. The method coupling resistance and capacitance for realizing information sensing is feasible, which is suitable for measuring the torque and rotational speed of the rotational shaft of mechanical equipment in spite of the compact structure and narrow space.

中文翻译：

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基于电阻和电容光栅的机械系统转轴扭矩和转速传感器

摘要 转矩和转速是表征机械系统旋转部件功率的重要参数，因此转轴的转矩和转速传感方法和实时信号处理是车辆、船舶等机械化设备的关键技术。因此，先进的扭矩和速度传感技术和数据处理技术对于提高机械设备的性能非常重要。但是，动力传输装置的转轴结构紧凑，空间狭小，因此很难在转轴上安装传感器的信号传输和供电装置。针对这些难题，本文提出了一种电阻电容耦合的转轴扭矩和转速测量方法。该方法使用两个电阻应变片和一个电容光栅，电容光栅以非接触耦合方式传输信号。转轴上的传感器无需供电，信号从固定套筒传输到测量电路，从根本上解决了信号传输和供电的难题。仿真和测量实验表明，电阻应变片获取信息，电容光栅传感器传递信息。该电阻电容耦合实现信息传感的方法是可行的，尽管结构紧凑，空间狭小，但适用于测量机械设备转轴的扭矩和转速。电容光栅以非接触耦合方式传输信号。转轴上的传感器无需供电，信号从固定套筒传输到测量电路，从根本上解决了信号传输和供电的难题。仿真和测量实验表明，电阻应变片获取信息，电容光栅传感器传递信息。该电阻电容耦合实现信息传感的方法是可行的，尽管结构紧凑，空间狭小，但适用于测量机械设备转轴的扭矩和转速。电容光栅以非接触耦合方式传输信号。转轴上的传感器无需供电，信号从固定套筒传输到测量电路，从根本上解决了信号传输和供电的难题。仿真和测量实验表明，电阻应变片获取信息，电容光栅传感器传递信息。该电阻电容耦合实现信息传感的方法是可行的，尽管结构紧凑，空间狭小，但适用于测量机械设备转轴的扭矩和转速。转轴上的传感器无需供电，信号从固定套筒传输到测量电路，从根本上解决了信号传输和供电的难题。仿真和测量实验表明，电阻应变片获取信息，电容光栅传感器传递信息。该电阻电容耦合实现信息传感的方法是可行的，尽管结构紧凑，空间狭小，但适用于测量机械设备转轴的扭矩和转速。转轴上的传感器无需供电，信号从固定套筒传输到测量电路，从根本上解决了信号传输和供电的难题。仿真和测量实验表明，电阻应变片获取信息，电容光栅传感器传递信息。该电阻电容耦合实现信息传感的方法是可行的，尽管结构紧凑，空间狭小，但适用于测量机械设备转轴的扭矩和转速。仿真和测量实验表明，电阻应变片获取信息，电容光栅传感器传递信息。该电阻电容耦合实现信息传感的方法是可行的，尽管结构紧凑，空间狭小，但适用于测量机械设备转轴的扭矩和转速。仿真和测量实验表明，电阻应变片获取信息，电容光栅传感器传递信息。该电阻电容耦合实现信息传感的方法是可行的，尽管结构紧凑，空间狭小，但适用于测量机械设备转轴的扭矩和转速。