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A highly sensitive, non-contact torque sensor was developed using amorphous magnetic alloy. A thin strip of amorphous magnetic alloy was bonded onto the surface of the shaft, formed into a chevron shape, then the torque applied to the shaft was detected from the difference in the inductance of the detection coil wound around the strip. A highly sensitive torque sensor having outstanding linearity could be made by selecting a magnetic working point and stress working point to apply to the amorphous magnetic alloy and by optimum arrangement of the heat treatment and bonding processes. Temperature characteristics, twist resistivity, and noise resistivity were also evaluated to prove performance in practical use.

An active vision system equipped with a high-speed pulsed light-emitting projector and a high-speed image sensor is proposed and applied to lane marker detection in this paper. The proposed system has the capability to suppress image information obtained from the background light and provides only the image information from the signal light emitted by the projector. This is accomplished by synchronizing image capture with the time of signal light emission. To reduce the power consumption and cost of the system, a relatively low intensity projector is used as the light source. The background illuminance on a bright day can be much higher than that of the signal. To improve the signal-to-background ratio, the signal light is modulated using a pulse width modulation technique. Then, the image is captured using a high-speed camera operating in synchronization with the time the signal light is emitted.