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    • 5. 发明授权
    • Differential pressure transmitter
    • 差压变送器
    • US08326550B2
    • 2012-12-04
    • US12865450
    • 2009-01-14
    • Tetsuya ShimakataKoichi Kondo
    • Tetsuya ShimakataKoichi Kondo
    • G01L7/00G06F19/00
    • G01L19/00
    • When the damping time constant Dτ is changed to Dτ=0, the sampling period Ts is automatically changed from 100 ms to 50 ms. The sampling time is automatically changed from 60 ms to 30 ms. Thus, when the damping time constant Dτ is changed to Dτ=0, a processing unit samples an electrical signal corresponding to the pressure difference of a fluid detected by a differential pressure sensor for the sampling time ts=30 ms in every sampling period Ts=50 ms, and finds the measurement value ΔP of the differential pressure by performing a variety of operation processing including a linearization operation and a square root operation on the sampled electrical signal. In the operation processing, the processing unit does not perform a damping operation.
    • 当阻尼时间常数Dτ变为Dτ= 0时,采样周期Ts自动从100ms变为50ms。 采样时间自动从60 ms变为30 ms。 因此,当阻尼时间常数Dτ变为Dτ= 0时,处理单元对每个采样周期Ts = 30ms的采样时间ts = 30ms对由压差传感器检测的流体的压力差对应的电信号进行采样, 通过对采样的电信号进行包括线性化运算和平方根运算的各种运算处理,求出差压的测量值&Dgr; P。 在操作处理中,处理单元不执行阻尼操作。