Hall-effect rotary-position sensors in transport and heavy industrial applications: Page 3 of 4

March 31, 2014 // By James McKenna, Honeywell Sensing and Control
Hall-effect rotary-position sensors in transport and heavy industrial applications
<p>There are a wide range of components, switches and sensors found inside most motorised vehicles that are used for personal transportation or for heavy industry. Designed to measure, monitor and provide feedback, Hall-effect rotary-position sensors can be used in a variety of transport applications such as cars, trucks, buses and boats as well as in a wide range of industrial applications. </p>

may be mounted adjacent to the pedal to measure how far down the pedal is pressed. The harder the operator presses, the deeper the pedal is depressed, allowing more fuel and air to be delivered to the engine so the vehicle moves faster. When the operator removes their foot from the pedal, the Hall-effect rotary-position sensor senses the change in position and sends a signal to the engine to reduce the flow of fuel and air across the throttle plate. The vehicle responds to this signal by slowing down.

Fig 1. Sensor may be used for foot pedal position sensing.

Honeywell’s RTY Series Hall-effect Rotary Position Sensors are designed to provide a minimum 35 million cycle product life due to its well-engineered bearing design and the related ICs.

Suspension/Kneeling Position Sensing in Buses and Trucks

Hall-effect rotary-position sensors can be used in buses and heavy-duty ride-height systems to sense travel of the suspension system. Buses utilise kneeling to lower their height so that passengers can board easily. The Hall-effect rotary-position sensor can be used on both ends of this application: one position sensor monitors the position of the control lever, and a second position sensor is deployed on a suspension arm or a linkage to monitor ride height.

Accurate position sensing validates that the vehicle is at the correct height for the application system’s requirement, improving vehicle ingress/egress. Large trailer trucks may also use Hall-effect rotary-position sensors to monitor trailer heights to improve warehouse docking efficiency.

Tilt/Trim Position Sensing for Speed Boats

Hall-effect rotary-position sensors can be used to monitor tilt/trim position for speedboats. The sensor accurately reports the angle position of the propeller, which can help the operator avoid damage and maintain optimum performance.

Agriculture and Irrigation Pivot Control

An interesting application for Hall-effect rotary-position sensors is irrigation sprinkler systems used by large farms. The sensor can monitor the angle range at which the sprinklers are irrigating. Is the

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