公开(公告)号：US20230287791A1

公开(公告)日：2023-09-14

申请号：US18015758

申请日：2021-07-12

Applicant: NOF Corporation ,  Futaba Corporation

Inventor： Kohki UCHIDA ,  Naoto YANAGI ,  Toshiyuki OGURA ,  Kohichi SHIMAZAKI ,  Kazuhito WATANABE ,  Takafumi KOMODA

IPC: E21D9/00 ,  F42B3/12 ,  F42D1/045 ,  F42D3/04

CPC classification number: E21D9/006 ,  F42B3/12 ,  F42D1/045 ,  F42D3/04

Abstract: A wireless detonation system (1) includes a blasting operation device (40), a detonator (10), and a relay device (30). The blasting operation device (40) is disposed at a distance from a blasting face (71) and wirelessly transmits a first downstream signal at a first frequency. The detonator (10) is loaded in a blast hole (72) in the blasting face (71), and has a receiving coil (12) for wirelessly receiving a second downstream signal at a second frequency lower than the first frequency. A relay device (30) includes a first transmitting-receiving antenna (35) that wirelessly receives the first downstream signal, a relay processor (32) 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 (37) that transmits the second downstream signal. The second transmitter-receiver antenna (37) is loaded into an insertion hole (74) in the blasting face (71) aligned with the blast hole (72).

公开(公告)号：US20190137249A1

公开(公告)日：2019-05-09

申请号：US16095161

申请日：2017-04-19

Applicant: NOF CORPORATION ,  FUTABA CORPORATION

Inventor： Yoji TASAKI ,  Satoshi HIKONE ,  Shinya TANAKA ,  Kohichi SHIMAZAKI ,  Kazuhito WATANABE ,  Michihiro TAKAYASU

IPC: F42C13/04 ,  H02J50/10 ,  H01Q7/06 ,  H01Q1/22 ,  H01Q21/24

Abstract: A wireless detonator (10) includes a detonation side receiving antenna (11), a detonation side transmitting antenna (18), an initiator (14) and a detonation side electronic circuit. The detonation side receiving antenna (11) 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 (11), transmits a response signal via the detonation side transmitting antenna (18) and ignites the initiator (14) 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.

公开(公告)号：US20210234644A1

公开(公告)日：2021-07-29

申请号：US17154596

申请日：2021-01-21

Applicant: Futaba Corporation

Inventor： Kazuhito WATANABE ,  Takafumi KOMODA

IPC: H04L1/18 ,  H04L12/741

Abstract: A communication system that can improve throughput when performing data transmission with respect to a plurality of devices, is provided. The communication system includes a transmitter and a receiver. The transmitter includes a transmitting section which is capable of transmitting a composite packet containing a plurality of packets. The receiver includes a receiving section capable of receiving the composite packet, a data acquisition section configured to take out a packet addressed to own station from the received composite packet, and a transmission control section configured to provide instructions for transmitting a receipt acknowledgement signal after a waiting time period has elapsed after the reception of the composite packet, the waiting time period being provided according to a data location of the packet addressed to the own station in the composite packet.

公开(公告)号：US20170085489A1

公开(公告)日：2017-03-23

申请号：US15235228

申请日：2016-08-12

Applicant: Futaba Corporation

Inventor： Kazuhito WATANABE

IPC: H04L12/855 ,  H04L12/751 ,  H04W40/24 ,  H04L12/721 ,  H04L12/761

CPC classification number: H04W40/24

Abstract: A wireless apparatus includes a communication control unit, a transmission unit for transmitting a message packet, a reception unit for receiving the message packet, and a storage unit for storing a transfer table in which transfer destination information is linked with a transfer priority indicating its priority among wireless apparatuses for transferring the message packet to a transfer destination. The communication control unit refers to the transfer table based on information on a transmission source and a transmission destination included in the received message packet. When the wireless apparatus of the transfer destination or the transfer priority is not determined, the communication control unit performs a transfer operation using broadcast communication. When the wireless apparatus of the transfer destination and the transfer priority are determined, the communication control unit performs a transfer operation using unicast communication in which the wireless apparatus of the transfer destination is specified.