Keyence Corporation

Daishiro Ishikawa

Atsushi Shimizu

Masaki Wada

Shinji Kawabata

Yasunori Kawaguchi

Ryuma Miyake

Shinichiro Otsu

Daiki Matsumoto

Masaki Ishihara

Provided is an ultrasonic flow sensor with improved practicality. An ultrasonic wave is transmitted and received by an ultrasonic element. A first flow rate value of a fluid in a pipe is calculated based on a propagation time difference of an ultrasonic signal, a measurement value corresponding to an ultrasonic velocity, and a parameter for identifying an inner diameter of the pipe. A second flow rate value of the fluid in the pipe is calculated based on a frequency shift of the ultrasonic signal and the parameter. The first flow rate value is calculated using a propagation time of the ultrasonic signal as the measurement value in accordance with a correspondence relationship among a distance of a path through which the ultrasonic wave propagates through the fluid in the pipe, a time for which the ultrasonic signal propagates in the path, and the ultrasonic velocity.

Ultrasonic flow sensor

To add a function of detecting a temperature to an ultrasonic flow sensor without making the structure of the ultrasonic flow sensor complicated. A sensor portion of the ultrasonic flow sensor includes an acoustic coupling member. The sensor portion includes a heat transfer member having a heat detecting surface for detecting heat of piping. The temperature of heat transferred in the heat transfer member via the heat detecting surface is detected by a temperature detecting device. The heat transfer member restricts an amount of collapse of the acoustic coupling member in a radial direction of the piping when the sensor portion is fixed to the piping.

Ultrasonic flow sensor and temperature measuring method using the same

Provided is an ultrasonic flow switch which can be stably mounted on pipe. A clamp part is mounted on an outer surface of the pipe. A casing part which integrally or independently holds the first and second ultrasonic wave elements is fixed to the clamp part by a sensor fixing screw. The clamp part is configured to restrict displacement of the casing part in an axial direction of the pipe and in a circumferential direction of the pipe and to allow displacement of the casing part in a radial direction of the pipe in a state where the casing part is not fixed.

Ultrasonic flow switch

A demand for downsizing of a multiple optical-axis photoelectric sensor can be coped with, and various state displays are performed. An inter-optical-axis indication unit is arranged between two adjacent optical axes so as not to interfere with the optical axis located in a lower end portion of a receiver. The inter-optical-axis indication unit is capable of displaying at least one piece of information out of a control input state, a safe special function state, a synchronization type, and an interlock state.

Multi-optical-axis photoelectric sensor having an inter-optical-axis indication unit

A Coriolis mass flow meter targeted for measurement of a fluid with a minute flow rate is reduced in weight and size, the flow meter being in which a subframe supporting a vibration exciter and first and second detectors has an outer peripheral wall, a notch and an inner peripheral wall, a circuit board supported by a main frame is positioned in the portion of the notch, the circuit board is housed in a board case penetrating the main frame, and a liquid crystal monitor is mounted in the portion of the circuit board adjacent to supply/discharge portions of a pair of vibration tubes.

Growing community of inventors

Osaka, Japan

Daishiro Ishikawa