Nof Corporation

Futaba Corporation

Kohichi Shimazaki

Kazuhito Watanabe

Yoji Tasaki

Satoshi Hikone

Michihiro Takayasu

Shinya Tanaka

Toshiyuki Ogura

Naoto Yanagi

Kohki Uchida

Takafumi Komoda

A wireless detonation system () includes a blasting operation device (), a detonator (), and a relay device (). The blasting operation device () is disposed at a distance from a blasting face () and wirelessly transmits a first downstream signal at a first frequency. The detonator () is loaded in a blast hole () in the blasting face (), and has a receiving coil () for wirelessly receiving a second downstream signal at a second frequency lower than the first frequency. A relay device () includes a first transmitting-receiving antenna () that wirelessly receives the first downstream signal, a relay processor () that wirelessly receives the first downstream signal and processes it into the second downstream signal to be wirelessly transmitted at the second frequency, and a second transmitting-receiving antenna () that transmits the second downstream signal. The second transmitter-receiver antenna () is loaded into an insertion hole () in the blasting face () aligned with the blast hole ().

Wireless detonation system, relay device for wireless detonation system, and wireless detonation method using wireless detonation system

A wireless detonator () includes a detonation side receiving antenna (), a detonation side transmitting antenna (), an initiator () and a detonation side electronic circuit. The detonation side receiving antenna () receives energy for driving the detonation side electronic circuit, a control signal and an initiation signal. The detonation side electronic circuit receives the energy, the control signal and the initiation signal via the detonation side receiving antenna (), transmits a response signal via the detonation side transmitting antenna () and ignites the initiator () in accordance with the initiation signal. A response frequency of the response signal is set to be greater than or equal to 100 MHz and less than or equal to 1 GHz.

Wireless detonator, wireless detonation system, and wireless detonation method

Growing community of inventors

Mobara, Japan

Kohichi Shimazaki