Hitachi, Ltd.

Hitachi High-tech Corporation

Yuusuke Kourai

Mutsumi Suzuki

Jun Maeda

Tetsuyoshi Ono

Shunsuke Miyamoto

Hirohisa Mizota

Kota Sasaki

Toshiyuki Inabe

Masanori Kitaoka

Azusa Yamada

The present invention provides a chemical analyzer with highly reliable agitation performance, said chemical analyzer not only diagnosing the deterioration of a piezoelectric element, but also diagnosing the deformation and displacement of a reaction container and diagnosing the normality of the liquid quantity of a substance to be agitated in the reaction container. This chemical analyzer is characterized by comprising: an agitating mechanism that uses acoustic waves to agitate a sample and a reagent within a reaction container, generates acoustic waves using a piezoelectric element, and has an acoustic wave sensor for detecting the acoustic waves; and a controller that controls the agitating mechanism. Said chemical analyzer is further characterized in that the controller has: an acoustic wave detection unit that processes a detection signal detected by the acoustic wave sensor; a normality information memory in which normal-time information is stored; a signal intensity determination unit that compares the acoustic wave amplitude and acoustic wave frequency transmitted from the acoustic wave detection unit with the acoustic wave amplitude and acoustic wave frequency stored in the normality information memory; and a repeat period determination unit that compares the acoustic wave period characteristic transmitted from the acoustic wave detection unit with the acoustic wave period characteristic stored in the normality information memory.

Chemical analysis apparatus

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

Growing community of inventors

Tokyo, Japan

Yuusuke Kourai