Canon Kabushiki Kaisha

Shigekazu Shimizu

Yasuo Takahashi

Kenji Kitabatake

Takuya Iwano

Tomoaki Ueda

Yasuhisa Fujii

Kazuhito Nakamura

Tokugen Yasuda

Naoya Ichimura

Yukio Kishimoto

A liquid discharge head includes a liquid discharge substrate configured to discharge liquid; a flow channel configured to supply the liquid to the liquid discharge substrate and including a first flow channel portion, a second flow channel portion communicating with the first flow channel portion and extending in a direction intersecting a predetermined direction in which the first flow channel portion extends, and a third flow channel portion provided on a downstream side of a position of communication between the first and second flow channel portion with respect to a flow of liquid flowing in the first flow channel portion and communicating with the first flow and second flow channel portion, the third flow channel portion including a first wall defining an end portion of a flow channel and a second wall having an inclined surface inclining toward a wall which defines the second flow channel portion.

Liquid discharge head and liquid discharge apparatus

A recovery phenomenon in which the concentration of a compound to be measured in soil increases again after reducing the concentration is utilized for changing the distribution state of the compound to be measured in soil, whereby the direction of the high-concentration region of the compound to be measured in soil can be detected.

Method of detecting high-concentration region direction of pollutant in soil

A current to be applied to a ground is defined as the sum of two sinusoidal waves having first and second frequency components. A signal to be used at the time of synchronous detection is defined as a difference between the sinusoidal waves having the first and second frequency components. As a result, a substance in the ground, and the position and depth of the substance can be specified with high accuracy.

Underground exploration apparatus

Growing community of inventors

Kita-adachi-gun, Japan

Shigekazu Shimizu