Panasonic Intellectual Property Management Co., Ltd.

Yuuji Nakabayashi

Hidetomo Nagahara

Masato Satou

Asako Miyoshi

Masataka Matsuda

Tomoki Masuda

Motoyuki Nawa

Masamichi Hashida

Masaki Sugiyama

Hideaki Morihana

Makoto Nakano

Hideki Kinoshita

Yudai Ishizaki

Masanobu Teraji

Teraji Masanobu

A physical quantity measurement device is provided which is capable of measuring a component in a fluid to be measured even when the fluid contains droplets such as fine water droplets. The physical quantity measurement device includes, at an inlet opening () of a sub-channel (), an inflow direction regulator () which includes guide pieces () each of which is inclined at predetermined angle θ with respect to the flow direction in a main channel (). The angle θ of inflow direction regulator () is set to a value that is greater than 90 degrees in relation to the flow direction of the main channel ().

Physical quantity measurement device

The present disclosure provides an ultrasonic transceiver capable of stably measuring a fluid of high temperature and high humidity for a long period, and provides an ultrasonic flowmeter, an ultrasonic flow velocimeter, and an ultrasonic densitometer each including the ultrasonic transceiver. An ultrasonic transceiver () comprises a piezoelectric body () and an acoustic matching body () disposed in one face of the piezoelectric body (), wherein the acoustic matching body () includes: a top plate, a bottom plate, and a side wall that define a closed space; and a perpendicular partition wall formed substantially perpendicular to the bottom plate and adhering to the top plate and the bottom plate, thereby dividing a closed space.

Ultrasonic transceiver, ultrasonic flowmeter, ultrasonic flow velocimeter, ultrasonic densitometer, and manufacturing method

An ultrasonic flowmeter includes: a flow path body having a flow path through which a fluid to be measured flows; a pair of ultrasonic transducers disposed in the flow path body; a substrate fixed to the flow path body; a sensor plate on which a temperature sensor for detecting a temperature of the fluid to be measured is disposed, the sensor plate being flat; and an arithmetic unit that calculates a flow rate of the fluid to be measured from a propagation time of ultrasonic waves between the pair of ultrasonic transducers and the temperature detected by the temperature sensor. The sensor plate is configured to project from the substrate and to project into a flow path cross-section of the flow path from a sensor hole provided in the flow path body at a time of fixing the substrate to the flow path body.

Ultrasonic flowmeter

An ultrasonic transceiver includes: a piezoelectric body including opposing surfaces having a first electrode and a second electrode respectively, piezoelectric body being segmented into a plurality of elements by a groove recessed from a surface having first electrode among the opposing surfaces; conductor electrically connected to first electrode on each of elements. The ultrasonic transceiver further includes reinforcement section provided in a part of second electrode, the part corresponding to a bottom of the groove. With this configuration, a decrease in a strength of piezoelectric body in the bottom of the groove, which is caused by a groove provided in piezoelectric body, can be prevented and occurrence of a crack can be prevented.

Ultrasonic transceiver

A gas meter includes a meter entrance that allows a fluid to flow in, a meter exit that allows the fluid to flow out, and a flow rate measurer that measures a flow rate of the fluid. In addition, the flow rate measurer includes a plurality of flow rate measuring units having the same shape and composed of a flow passage portion with a rectangular cross section shape on the outer side and a sensor portion disposed on one face of the flow passage portion. The plurality of flow rate measuring units are integrally configured by bonding faces having no sensor portion so as to serve as bonding faces of the flow rate measuring units.

Gas meter

Growing community of inventors

Nara, Japan

Yuuji Nakabayashi