Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Yukinori Ozaki

Masato Satou

Yuji Fujii

Akihisa Adachi

Hajime Miyata

Aoi Watanabe

Hirokazu Gotou

Makoto Nakano

Hideaki Morihana

Yuuji Fujii

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 casing.

Ultrasonic flow rate measurement device

An ultrasonic wave transmitting and receiving unit includes: a piezoelectric member supporting plate; an acoustic matching member fixed to one surface of the piezoelectric member supporting plate; a piezoelectric member fixed to the other surface. Moreover, the ultrasonic wave transmitting and receiving unit includes: an insulating vibration suppressing member integrally formed in such a manner as to cover the piezoelectric member and the piezoelectric member supporting plate, wherein the insulating vibration suppressing member has a hole reaching the piezoelectric member supporting plate.

Ultrasonic transducer and ultrasonic flow-meter

Ultrasonic flow rate measurement device includes measurement flow path in which a fluid to be measured flows, and a pair of ultrasonic vibrators that are disposed in directions such that a propagation path of an ultrasonic wave forms a V-shape relative to measurement flow path. Moreover, the device includes measurement circuit which measures a flow rate of the fluid to be measured by measuring a propagation time of the ultrasonic wave between the pair of ultrasonic vibrators, and inlet-side rectification part which is disposed, in the inlet side of measurement flow path, to stabilize the flow of the fluid to be measured. Furthermore, the device includes outlet-side coupling part which is disposed in the outlet side of measurement flow path, and signal lead-out part which outputs a flow rate value measured with measurement circuit.

Ultrasonic flow rate measurement device having inlet side flow rectification part and outlet side coupling part

An ultrasonic flow rate measuring device includes a flow path, a partition plate that is inserted from an aperture to partition the flow path into plural sections, an ultrasound transmission body, plural ultrasonic transducers that are provided in positions facing a bottom plate such that an ultrasonic wave transmitted from one of the ultrasonic transducers through the ultrasound transmission body is reflected by the bottom plate and received by the other ultrasonic transducer, a measurement circuit that measures an ultrasonic propagation time between the plurality of the ultrasonic transducers; and a calculation circuit that obtains a flow rate of the target fluid based on a signal from the measurement circuit.

Partition plate securement for an ultrasonic flow meter

Provided are an ultrasonic fluid-measuring apparatus and an ultrasonic fluid-measuring apparatus that can prevent the disturbance from occurring in the ultrasonic waves due to disturbance of a fluid. An ultrasonic fluid-measuring structure includes an ultrasonic measuring section adjacent to a channel member. The channel member includes a first ultrasonic wave input/output section and a second ultrasonic wave input/output section provided in a first side wall part, and a reflecting surface provided on an inner surface of the second side wall part. Further, it is configured so that the first ultrasonic wave input/output section and the second ultrasonic wave input/output section are adjacent to each other, and an ultrasonic wave transmission membrane through which the ultrasonic waves pass covers together both the first ultrasonic wave input/output section and the second ultrasonic wave input/output section.

Ultrasonic fluid-measuring structure and ultrasonic fluid-measuring apparatus

A multilayer flow path member of an ultrasonic fluid measurement apparatus and an ultrasonic fluid measurement apparatus capable of enhancing the measurement accuracy of the mean flow velocity are provided. When a multilayer flow path memberplaced in a measurement flow pathshaped in a rectangular cross-section pipe of an ultrasonic fluid measurement apparatusis partitioned into a plurality of flat flow pathsby partition platesattached to a framealong a flowing direction, the partition platesare provided so as to face inner facesandof the measurement flow path. Thus, the partition platesare exposed and face the inner facesandof the measurement flow pathand thus the space between the exposed partition plateand the inner faceof the measurement flow pathbecomes the highest-stage or lowest-stage flat flow path. Therefore, a problem of degrading the measurement accuracy as a fluid flows into the space between the frameforming a part of the multilayer flow path memberand the inner faceof the measurement flow pathas before does not occur and accordingly the measurement accuracy can be enhanced.

Growing community of inventors

Nara, Japan

Yukinori Ozaki