Hitachi, Ltd.

Masanori Kitaoka

Hiroshi Yoshikawa

Toshihiro Yamada

Nobuhiro Kakeno

Mutsumi Suzuki

Hisashi Endo

Hisashi Endou

Hirohisa Mizota

Kota Sasaki

Yuusuke Kourai

Provided is a liquid droplet generation method capable of generating liquid droplets having a diameter of 100 μm or more. The liquid droplet generation method for generating liquid droplets from a liquid layerby using a plurality of transducers, the method including irradiating the liquid layerwith a plurality of ultrasonic waves from the plurality of transducersto scatter primary liquid dropletsA andB from the liquid layer, and causing the primary liquid dropletsA andB being scattered to aggregate and grow into a secondary liquid dropletA.

Liquid droplet generation method

A manufacturing monitoring assistance device includes: a model creation unit creating a computation model when a product as a sample is normal, based on a three-dimensional form acquired from the product; a simulation unit creating a corrective computation model when the product is abnormal, by adding a sample of an abnormal portion in the product to the created computation model, and performing a simulation on each of the computation model and the corrective computation model; and a monitoring method determination unit determining a method for monitoring a manufacturing process for the product, based on an abnormality index being a difference between an output from a sensor as a result of the simulation performed on the computation model and an output from a sensor as a result of the simulation performed on the corrective computation model, and causing an output device to display the determined method and the abnormality index.

Manufacturing monitoring assistance device, manufacturing monitoring assistance method, and manufacturing monitoring assistance program

A stress distribution measurement device includes: a first magnetostrictive sensor and a second magnetostrictive sensor each including an excitation coil that excites AC magnetism in a measurement target using alternating current, and a detection coil to which alternating current is induced due to the AC magnetism flowing in the measurement target; an excitation circuit that applies a first excitation voltage to the excitation coil of the first magnetostrictive sensor and applies a second excitation voltage to the excitation coil of the second magnetostrictive sensor, the second excitation voltage having a phase or a waveform different from the first excitation voltage; and a detection circuit that includes a first detector that performs synchronous detection of current flowing in the detection coil of the first magnetostrictive sensor based on the first excitation voltage and a second detector that performs synchronous detection of current flowing in the detection coil of the second magnetostrictive sensor based on the second excitation voltage.

Stress distribution measurement device and stress distribution measurement method

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Tokyo, Japan

Masanori Kitaoka