传感器——通信电子工程类中英文翻译、外文翻译.doc

What is a smart sensor
One of the biggest advances in automation has been the development and spread of smart sensors. But what exactly is a "smart" sensor? Experts from six sensor manufacturers define this term.
A good working "smart sensor" es from Tom Griffiths, product manager, Honeywell Industrial Measurement and Control. Smart sensors, he says, are "sensors and instrument packages that are microprocessor driven and include features such munication capability and on-board diagnostics that provide information to a monitoring system and/or operator to increase operational efficiency and reduce maintenance costs."
No failure municate
"The benefit of the smart sensor," says Bill Black, controllers product manager at GE Fanuc Automation, "is the wealth of information that can be gathered from the process to reduce downtime and improve quality." David Edeal, Temposonics product manager, MTS Sensors, expands on that: "The basic premise of distributed intelligence," he says, is that "complete knowledge of a system, subsystem, ponent's state at the right place and time enables the ability to make 'optimal' process control decisions."
Adds John Keating, product marketing manager for the Checker machine vision unit at Cognex, "For a (machine vision) sensor to really be 'smart,' it should not require the user to understand machine vision."
A smart sensor municate. "At the most basic level, an 'intelligent' sensor has the ability municate information beyond the basic feedback signals that are derived from its application." says Edeal. This can be a HART signal superimposed on a standard 4-20 mA process output, a bus system, or wireless arrangement. A growing factor in this area is IEEE 1451, a family of smart transducer interface standards intended to give plug-and-play functionality to sensors from different makers.
Diagnose, program
Smart sensors can self-monitor for any aspect of their operation, including "photo eye dirty, out of tolerance, or failed switch,