Patent
Ultrasonic flow rate measurement device
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TLDR
An ultrasonic flow rate measurement device includes a measurement channel, through which a fluid to be measured flows; and a sensor fixing casing having openings formed in the measurement channel and sensor fixing cavities communicating with the openings as mentioned in this paper.Abstract:
An ultrasonic flow rate measurement device includes a measurement channel, through which a fluid to be measured flows; and a sensor fixing casing having openings formed in the measurement channel and sensor fixing cavities communicating with the openings Moreover, the ultrasonic flow rate measurement device includes a pair of ultrasonic sensors contained in the sensor fixing cavities, for measuring the flow rate of the fluid to be measured; and a flow rate measuring unit for detecting the flow rate based on an ultrasonic wave propagation time between the pair of ultrasonic sensors Furthermore, the ultrasonic flow rate measurement device includes a suppressing member formed at each of the openings, for suppressing the fluid to be measured from intruding into each of the sensor fixing cavities, wherein the suppressing member is molded integrally with the sensor fixing casingread more
Citations
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References
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Patent
Apparatus and methods for measuring fluid flow parameters
TL;DR: In this paper, an apparatus and method for measuring fluid flow parameters operate under conditions wherein the composition of the fluid flow can change rapidly thereby changing the speed of sound within the fluid and wherein the actual flow rate can also change rapidly, thus further changing the transit time of acoustic energy traversing an interrogation path within a fluid.
PatentDOI
Long wavelength acoustic flowmeter
TL;DR: In this paper, a nonintrusive instrument for measuring the volume flowrate of, and the speed of sound in, an arbitrary fluid in a pipe, tube or duct is presented.
Patent
Fluid flow meter
TL;DR: In this article, a fluid flow rate meter is disclosed for measuring the flow of fluid in a partially filled conduit or channel, including an electromagnetic probe adapted for mounting in the conduit below the low water mark thereof to produce a sensed velocity signal, and a liquid height pressure transducer including an air tube having a bubble-producing opening adjacent the probe for generating a fluid height signal that modifies the sensed velocity signals to produce the resultant signal that corresponds with the average velocity of fluid flow.
Patent
Ultrasonic apparatus and method for measuring the concentration and flow rate of gas
TL;DR: In this article, an ultrasonic apparatus measures the concentration and flow rate of a sample gas by calculating a possible propagation time range on the basis of the gas temperature, determining whether or not the phases at which two first trigger signals, respectively generated on a basis of forward and backward waveforms of the ultrasonic waves, coincide with each other, processing the zero-cross signals so that the phases of the phases coincide with one another.
Patent
Ultrasonic gas flowmeter as well as device to measure exhaust flows of internal combustion engines and method to determine flow of gases
TL;DR: An ultrasonic gas flowmeter includes a measuring pipe with flowing gas, transmitting and receiving sound transducers, transmission and reception electronics, and evaluation electronics as discussed by the authors, which is designed as capacitive electroacoustic ultrasonic transducers to construct a flowmeter with improved capacity.