CambridgeIC simplifies measurement of arc angle inside machines


Figure 1 CambridgeIC's R48mm 100° Arc Sensor

CambridgeIC has launched a new range of arc position sensors. These measure the angle of a rotating target relative to a fixed, arc shaped sensor built from a PCB. Sensors are robust, precise and can work in harsh environments. They measure absolute angle without physical contact using resonant inductive position sensing technology. This delivers wear-free operation, and means sensors can be installed without alignment or calibration.

CambridgeIC's Arc Position Sensors are particularly suited to applications where the customer needs to embed a position sensor inside their product, and is seeking a simpler mechanical design. Typical examples are measurement of valve angle, antenna elevation, surveillance camera tilt, suspension level, exercise equipment and heliostat angle for solar energy collection.

Figure 2 90° butterfly valve angle application

The new arc position sensor range includes parts with sensor radius of 25mm, 30mm, 36mm, 48mm, 68mm and 100mm. They work with CambridgeIC's Standard Target positioned either towards the inside or the outside of the sensor arc.

In most production applications, customers will have sensors built to CambridgeIC's designs at their normal PCB manufacturer. This means the customer's mechanical design team can adapt the PCB design for the best possible integration with their product. For example they can customise shape, attachment features and connector, and sometimes add processing circuitry to the same physical PCB.

Sensors are wired to a CambridgeIC processor chip, for example the CAM204, to deliver precise angle measurements to the host product's processor.

David Ely, founder and Director of CambridgeIC, comments "we believe this is a world first: a range of truly non-contacting, embeddable sensors that measure positon along an arc. They avoid the mechanical complexity that comes from adapting traditional linear and rotary sensors for the task".

Figure 3 Mechanical complexity when using conventional linear or rotary sensors for measuring arc angle

Samples of the new arc sensors are available now, together with development boards and other tools for evaluation and prototyping.

We updated our web site to include a new product page for the parts, a technology comparison and an applications page…

About CambridgeIC
CambridgeIC develops integrated circuits for sensing the precise position of moving parts in machines. Specialising in resonant inductive position sensing, the team has been leading the development of this technology for over 16 years. CambridgeIC's CTU chips such as the CAM204 detect the position of up to 4 axes without contact, using position sensors built using conventional PCB processes. CambridgeIC's large and growing library of standard sensor designs includes linear and rotary sensors in a variety of sizes and accuracy grades. Traditional position sensing technologies such as optical encoders, LVDTs and potentiometers require specialist skills and processes for their manufacture and require housings for protection and alignment. By making sensors from PCBs to CambridgeIC's designs, customers can build sensors as part of their existing production process and embed them deeply into their product design.

For more information, please contact:

Tel: +44(0) 1223 413500

June 2017

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