Citation
(2007), "New pulse-width modulation option offers low cost digital signalling", Sensor Review, Vol. 27 No. 1. https://doi.org/10.1108/sr.2007.08727aad.004
Publisher
:Emerald Group Publishing Limited
Copyright © 2007, Emerald Group Publishing Limited
New pulse-width modulation option offers low cost digital signalling
New pulse-width modulation option offers low cost digital signalling
PennyþGiles, designer and manufacturer of high precision sensing technology, has developed a pulse- width modulation (PWM) option for its ICT range of contactless in-cylinder linear transducers. Launched last year, the rugged and reliable ICT range was designed for hostile conditions inside mobile and static hydro-pneumatic actuators. The new option provides further assurance for OEMs as the digital signal of the PWM is more robust and less vulnerable to noise than analogue voltage signals. The option also provides a simple cost-effective way to “go digital” as it does not require an A/D converter or other re- configuration.
PennyþGiles' ICT transducers come with a separate electronics package, EICT (Figure 4). This can be located up to 10m away from the transducer protecting it from the harsh environments associated with heavy- duty applications such as steering position actuators and hydro- pneumatic suspension systems. Currently, the EICT provides analogue position feedback proportional to the cylinder rod position for actuator strokes up to 2,000mm.
Figure
4 The new PWM option for PennyþGiles' ICT range of transducers
The PWM option produces a TTL- level compatible signal which has a duty cycle proportional to transducer displacement. This can be converted easily to a digital value by most microcontrollers without the necessity for expensive high-resolution analogue to digital converters.
Four different output frequencies can be selected, 100, 130, 310 and 1,000Hz, allowing users to choose the best compromise between digital resolution and acquisition speed for their particular system. As a result of this development, OEMs can now expand their digital control logic offering for measurement and control sensing technology in line with increased customer demand.
For further information contact: www.pennyandgiles.com