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使用MPX2100DP压力传感器设计简单的4-20 mA传送
消耗积分:2 |
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大小:76 |
2009-05-23
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Pressure is a very important parameter in most industrial
applications such as air conditioning, liquid level sensing and
flow control.
In most cases, the sensor is located close to the measured
source in a very noisy environment, far away from the receiver
(recorder, computer, automatic controller, etc.)
The transmission line can be as long as a few hundred
meters and is subject to electromagnetic noise when the
signal is transmitted as voltage. If the signal is transmitted as
a current it is easier to recover at the receiving end and is less
affected by the length of the transmission line.
The purpose of this note is to describe a simple circuit which
can achieve high performance, using standard Motorola
pressure sensors, operational amplifiers and discrete
devices.
applications such as air conditioning, liquid level sensing and
flow control.
In most cases, the sensor is located close to the measured
source in a very noisy environment, far away from the receiver
(recorder, computer, automatic controller, etc.)
The transmission line can be as long as a few hundred
meters and is subject to electromagnetic noise when the
signal is transmitted as voltage. If the signal is transmitted as
a current it is easier to recover at the receiving end and is less
affected by the length of the transmission line.
The purpose of this note is to describe a simple circuit which
can achieve high performance, using standard Motorola
pressure sensors, operational amplifiers and discrete
devices.
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