To provide a pressure sensing device and a pressure sensing system capable of detecting clogging of a connecting pipe, at low cost and at a high sensitivity.
A differential-pressure/pressure transmitter 2 as a pressure detector, is provided with connecting pipes 6a, 6b connected to mutually different positions of a pipe 4, wherein a fluid X flows, a sensor unit 11 for detecting a static pressure and the differential pressure between the pressure inside the connecting pipe 6a and the pressure inside the connecting pipe 6b, and a detection part 19 for detecting clogging of at least one of the connecting pipes 6a, 6b, based on the magnitude of the ratio between fluctuation of the differential pressure and that of the static pressure detected by the sensor unit 11. Specifically, the detection part 19 finds the dispersion or the average value of the ratios between fluctuations in the differential pressure and fluctuations of the static pressure, and by comparing these values with predetermined thresholds, or the like, diagnoses the existence of the clogging of at least the one of the connecting pipes 6a, 6b.
| JPH08136386A | 1996-05-31 | |||
| JP2007047012A | 2007-02-22 |
Tadashi Takahashi
Takashi Watanabe
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama