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results in a positive bias voltage, typically between 8 and 12 volts, at the output. The actual measuring signal of the sensor is added to this bias voltage. The supply or compliance voltage of the constant current source should be 24 to 30 V which is about two times the bias voltage. This ensures maximum amplitudes in positive and negative direction.
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voltage, there is no sensor present or the cable path has been interrupted. A signal close to the saturation voltage, indicates a short circuit in the sensor or cable. In between these two limits a functional sensor has been detected. The bias voltage is cut off by a coupling capacitor at the instrument input and only the
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Many measuring instruments designed for piezoelectric sensors or measurement microphones have an IEPE constant current source integrated at the input. In measuring instruments with IEPE input the bias voltage is often used for sensor detection. If the signal lies close to the constant current supply
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Most IEPE sensors work at a constant current between 2 and 20 mA. A common value is 4 mA. The higher the constant current the longer the possible cable length. Cables of several hundred meters length can be used without a loss of signal quality. Supplying the IEPE sensor with constant current,
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consumption of 100 mW. This can be a drawback in battery powered systems. For such applications low-power IEPE sensors exist which can be operated at only 0.1 mA constant current from a 12 V supply. This may save up to 90 % power.
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Piezoelectric sensors which do not possess IEPE electronics, meaning with charge output, remain reserved for applications where lowest frequencies, high operating temperatures, an extremely large
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also apply the IEPE standard. Other proprietary names for the same principle are ICP, CCLD, IsoTron or DeltaTron.
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Zibbix ICP Injection
Control Pressure Sensor For 94-03 7.3L Powerstroke
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Bücher bei Google Play
Handbook of Signal Processing in Acoustics
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The electronics of the IEPE sensor (typically implemented as
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Havelock, David; Sonoko, Kuwano; Vorländer, Michael (2008).
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conversion electronics. IEPE sensors are used to measure
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Wilson, Jon S.; Ball, Stuart; Huddleston, Creed (2008).
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Bias voltage and output voltage swing of an IEPE sensor
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IEPE sensor connected to the input of an instrument
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