Automotive Level-Sensing > 배터리스위치/센서

Littelfuse Pulsed WaveGuide™ (PWG™) sensor technology, patent pending¹, is a cost effective linear position sensing technology that is capable of producing a highly versatile, robust and accurate distance measurement solution.

The Pulsed WaveGuide Sensor package contains signal conditioning electronics and a screened

 wave guide transmission line - the sensing element. When used in conjunction with a suitable

 permanent magnet, the signal transmitted along the wave guide is reflected at the magnet

 position. The time of flight between start of transmission and the reflected signal is directly

 proportional to the distance between the start point of the wave guide and the magnet position.

In order to minimize power consumption, the measurement frequency can be optimized.

In addition, the measurement mode can also be set to burst mode and poll mode.

 In burst mode the system enters a sleep state and awakes to report position

 at preset intervals; in poll mode the sensor reports position upon demand from an ECU.

Applications:

• Linear actuator position sensing
• Liquid level sensing, SCR
• Valve position sensing
• Clutch and brake cylinder piston position
• Vehicle suspension height sensing
• Robotic applications
• Industrial positioning applications

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