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Contactless position sensors |
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Measurement of angular position using variation of magnetic field amplitude induced by the displacement of a moving magnet has been intensively developed over the last fifteen years. However, these solutions have limits in terms of angular range and temperature influence.
The technology used by Piher is only sensitive to the flux density coplanar with the IC surface. This allows to decode the absolute rotary (angular) position from 0 to 360 degrees. It enables the design of high performance non-contacting rotary position sensors for both automotive and industrial applications whithout the limitations of potentiometric solutions (wear, electrical angle...).
In combination with the appropriate signal processing, the magnetic flux density of a small magnet (diametral magnetization) rotating above the IC can be measured in a non-contacting way. The angular information is computed from both vectorial components of the flux density (i.e. BX and BY). Then an output signal proportional to the decoded angle is produced. The output is selectable between Analog, PWM and Serial Protocol. A configurable switch ouptput is integrated within the sensor too.
Redundancy is also integrated in the circuit and furthermore you can request a dual-chip sensor for true full redundancy which comprises a dual switch output.
Piher contactless absolute sensors are sealed and flange mounted for easy positioning when necessary. They provide excellent repeatability, accuracy, resolution, linearity and high stability under harhs environment conditions such as vibration, shock, extreme temperatures / humidity, dither, moisture or dirt. Featuring a modular architecture, electrical & mechanical characteristics can be fully customised to customer´s needs. Endless connector configurations are available too.
Piher is a specialist designer and manufacturer of true non-contact absolute sensors for use in harsh environments and custom product tailoring for use on Tier One and OEM platforms including contactless magnetic technology complete sub assemblies.
Main features
• Low cost. Low profile
• Linearity: ±1% absolute (0.5% upon request)
• Simple & Robust Magnetic Design
• Programmable Angular Range up to 360 Degrees (without dead band)
• Programmable Linear Transfer Characteristic(some positive slopes & one negative slope can be programmed in the same transfer characteristic; up to 4 programmable points)
• Selectable Analog (Ratiometric), PWM, Serial Protocol
• Programmable switch output
• Up to 14 bit Angular Resolution
• Full Redundant option upon request
• 40 bit ID Number
• Self-Diagnostic features
• Rotational life: >50.000.000 cycles (depending on application and mounting)
• Operating temperature: -40ºC to +150ºC
• Supply voltage: 5V ±10% (others upon request)
• +10V over voltage protection and –10V reverse voltage protection
• IP65 (others upon request)
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Application examples
• Non-Contacting long life angle/position sensor
• Absolute Rotary Position Sensor
• Pedal Position Sensor
• Throttle/EGR Valve and Gear Position Sensor
• Height & suspension Sensor
• Non-Contacting Potentiometer
• Float-Level Sensor
• Motor-shaft Position Sensor
• Turn counter
• Precision Robotics,industrial equipment and HVAC monitoring & control...
• Joystick
• Forklift position sensors
• Valve actuators position sensors
• Solar trackers position sensors
• Lift position sensors
• Brake Pedal position sensors
• Grape harvesters position sensors
• Steering torque sensors
• Wind power generators position sensors
• Suspension sensors
• Clutch sensors
• Aeronautic position sensors
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 Download contactless sensors flyer
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Sensors and controls for the industrial/marine markets.
Most of the cars in the market have a Piher component inside. Enter here to learn why!
Wherever you look in your home, you will find Piher