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Applications

 

CambridgeIC's resonant inductive position sensors measure the precise position of a target.

  •  No mechanical or electrical contact between sensor and target: wear free
  •  Full absolute output: no homing or reference mark required
  •  Built using conventional PCB technology: accurate, stable and cost effective
  •  May be integrated with a customer's own circuitry for simplicity and low cost
  •  Large gaps possible: sensors "see" through plastic housings
  •  Tolerant of misalignment: no need to stabilise target with its own sliding bearing

Motor Control

Demands for smoothness, efficiency and cost effectiveness drive motor control design.  Technologies including optical or magnetic encoders, resolvers or sensorless control are traditional solutions, but none really nails all three demands well on its own.  CambridgeIC's CAM502 IC used with Type 6 Precision Through Hole Rotary Sensors offers an attractive alternative. 

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Stepper Motor Feedback

Stepper motors are simple to drive and control.  However there is a risk of losing step when current is kept low to save on energy use.  Sensorless feedback can help detect a stall condition, but it requires careful tuning and can not provide the same reassurance as checking the physical shaft angle with a position sensor.  Optical encoders are traditional position sensors, but they can stop working with even small amounts of environmental contamination including dust, and require careful mechanical alignment to perform well.  CambridgeIC's miniature through hole rotary sensors offer a robust and precise alternative that is not affected by dirt and dust. 

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Linear Actuator

Linear actuators frequently employ a stepper motor to position the load, or perhaps a or servo motor with encoder.  These require a ballscrew to convert a precise rotary position to a linear one.  Ballscrews are expensive, heavy and will often require protection from a harsh environment.    CambridgeIC's linear position transducers allow designers to measure position at the point of load, so the ballscrew may be replaced with a belt to deliver a lighter, more cost effective module.

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Dial Reading

Resonant inductive sensing is well suited to measuring the angle of dials.  They can form part of a user interface, to deliver precise inputs to electronics. Or they may be part of a machine, for example the register wheels of a mechanical meter.

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Multi Axis Sensing

A single Central Tracking Unit (CTU) chip can work with multiple sensors, each built from conventional low-cost PCB technology and used in conjunction with a simple target.  This delivers a particularly cost effective solution for such multi-axis systems.

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Float Level Sensing

Resonant inductive position sensing works through liquids and non-metallic housings to sense the location of a target.  To sense liquid level, a resonator is embedded in a float, which acts as the target.

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Arc Position Sensor Applications

Arc Position Sensors from CambridgeIC measure the angle of a rotating target relative to a fixed sensor. They are positioned off axis, so that the rotation axis is free from sensor parts and any couplings. Arc sensors only extend along the measurement range of interest, so a complete sensor ring around the axis is not needed.

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