Mitsubishi Denki Kabushiki Kaisha

Tomoyuki Nakaguchi

Sho Ito

Kumio Kasahara

Shojiro Nakahara

Toshio Takei

Tsutomu Hashimoto

Kenji Tatsumi

A batting practice trainer includes a laser oscillator placed in a sensor unit configured to resemble a home plate. Three beams are emitted from the sensor unit in a predetermined pattern, so that the height, speed, and angle of elevation of a swinging bat may be calculated from the passage of the bat across the beams. This is accomplished without interferring with the batters' swing or substantially modifying the bat.

Baseball bat swing measuring device

The height and inclination of a batter's swing plane are measured by a batting practice device shaped like a home plate and including a laser source and photosensors for detecting laser light reflected by the bat when swung over the plate.

Swing measuring device

Growing community of inventors

Kanagawa, Japan

Tomoyuki Nakaguchi