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公开(公告)号：US3952592A
公开(公告)日：1976-04-27
申请号：US309250
申请日：1972-11-24
CPC分类号： G06J1/00 , G01F1/90 , G01N9/002 , G01N2009/008
摘要： A net oil computer including a vibration densitometer and a turbine flowmeter. The flowmeter produces output pulses at a frequency directly proportional to the rate of volume flow through a pipeline. The output of the flowmeter is impressed upon the pole of a single pole, double throw electronic switch. One switch contact is connected to an indicator through a divider, a driver amplifier and a counter. The other contact is also connected to an indicator through a divider, a driver amplifier and a counter. The switch is operated by a gate generator connected from the densitometer. The gate generator produces an output pulse of a pulse width directly proportional to the percent of oil or water in the pipeline. A temperature probe is inserted in the line to vary the pulse width in accordance with oil temperature. The densitometer has an improved magnetostrictive drive which is controlled to have a phase proper for maximum resonance. The densitometer is also provided with a self-start circuit to find resonance automatically. A synchronous detector detects resonance and automatically turns the self-start circuit off.
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公开(公告)号：US3934127A
公开(公告)日：1976-01-20
申请号：US517212
申请日：1974-10-23
CPC分类号： G06F7/68 , G01F15/046 , G01N9/002 , G06F7/62 , G01N2009/004 , G01N2009/008
摘要： Apparatus for producing a digital or analog output directly proportional to the ratio of the densities of two gases at the same temperature and pressure. The ratio is usually that of the density of a gas of interest to the density of air. One outstanding feature of this instrument resides in the use of an automatic DC current control for gas and air vibrating ferromagnetic vanes which unexpectedly provides temperature compensation. The gas vane is immersed in the gas. The air vane is immersed in air. Gas and air piezoelectrical crystals for the respective gas and air vanes produce output signals of frequencies corresponding to the vibrational frequencies of the respective gas and air vanes. In combination with other gear, phase lock loops adapted for frequency multiplication are employed and advantageously improve accuracy. Substantial economy is surprisingly achieved in solving the equation. Still another feature resides in the equipment saving involved in time sharing two long counters.It is striking that the gravity of a fluid has been found to be directly proportional to either one of the following two expressions:(T.sub.g - T.sub.go) (f.sub.a - f.sub.ao ')And ##EQU1## WHERE T.sub.go is a constant, T.sub.ao is a constant, f.sub.ao is a constant, T.sub.ao is a constant, T.sub.g is the sample fluid vane period, T.sub.a is the reference (e.g. air) vane period, f.sub.a is the reciprocal of T.sub.a, and f.sub.ao ' is a constant.
摘要翻译： 用于产生与在相同温度和压力下的两种气体的密度比成正比的数字或模拟输出的装置。 该比率通常是空气密度所关注的气体的密度。 该仪器的一个突出特点在于对气体和空气振动铁磁叶片使用自动直流电流控制，这意味着提供温度补偿。 气体叶片浸入气体中。 风叶片浸入空气中。 用于相应气体和空气叶片的气体和空气压电晶体产生对应于相应气体和空气叶片的振动频率的频率的输出信号。 结合其他齿轮，采用适用于倍频的锁相环，有利地提高精度。 在解决方程中，实质性经济令人意外地实现。 另外还有一个功能在于设备节省时间分配两个长计时器。
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公开(公告)号：US4037461A
公开(公告)日：1977-07-26
申请号：US711739
申请日：1976-08-05
IPC分类号： G01N9/00
CPC分类号： G01N9/002 , G01N2009/008
摘要： Vibration densitometer probes having vanes with central weights notched to vibrate at the same frequency when immersed in a fluid at the same density.
摘要翻译： 振动密度计探针具有中心重量的切口，当以相同的密度浸入流体中时，它们以相同的频率振动。
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