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    • 95. 发明公开
    • MEASUREMENT INSTRUMENT
    • 测量仪器
    • EP2239717A1
    • 2010-10-13
    • EP09706756.5
    • 2009-01-14
    • Yamatake Corporation
    • SHIMAKATA, TetsuyaNOMIYAMA, Takashi
    • G08C13/00G01L13/00
    • G01L9/045G01L19/02
    • One A/D converter (1) and the other A/D converter (2) have a common power supply voltage and sample an A/D conversion value at short time intervals and at a long time intervals, respectively. Both the A/D converter (1) and the A/D converter (2) are set in a constant active state (continuous conversion mode). This allows the total consumption current (Ia) combining the consumption current (Ia1) of the A/D converter (1) and the consumption current (Ia2) of the A/D converter (2) to be constant, so that the power supply voltage (Vcc) is stabilized and a stable A/D conversion value can be obtained from each of the A/D converters.
    • 一个A / D转换器(1)和另一个A / D转换器(2)具有共同的电源电压,并分别在短时间间隔和长时间间隔内对A / D转换值进行采样。 A / D转换器(1)和A / D转换器(2)都被设置为恒定激活状态(连续转换模式)。 由此,能够将A / D转换器(1)的消耗电流(Ia1)与A / D转换器(2)的消耗电流(Ia2)合计的总消耗电流(Ia)固定, 电压(Vcc)稳定并且可以从每个A / D转换器获得稳定的A / D转换值。
    • 96. 发明公开
    • DIFFERENTIAL PRESSURE TRANSMITTER
    • DIFFERENTIALDRUCKÜBERTRÄGER
    • EP2239716A1
    • 2010-10-13
    • EP09706698.9
    • 2009-01-14
    • Yamatake Corporation
    • SHIMAKATA, TetsuyaKONDO, Koichi
    • G08C13/00G01L13/00
    • 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 ts is automatically changed from 60 ms to 30 ms. Thus, when the damping time constant Dτ is changed to Dτ = 0, a processing unit (3) samples an electrical signal corresponding to the pressure difference of a fluid detected by a differential pressure sensor (1) for the sampling time ts=30ms 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 (3) does not perform a damping operation.
    • 当阻尼时间常数DÄ变为DÄ= 0时,采样周期Ts自动从100ms变为50ms。 采样时间ts从60 ms自动更改为30 ms。 因此,当阻尼时间常数DÄ改变为DÄ= 0时,处理单元(3)对与由压差传感器(1)检测的流体的压差相对应的采样时间ts = 30ms的电信号进行采样 每个采样周期Ts = 50ms,并且通过对采样的电信号执行包括线性化操作和平方根操作的各种操作处理来找到差压的测量值“P”。 在操作处理中,处理单元(3)不执行阻尼操作。