Nippon Telegraph and Telephone Corporation

Toshihiko Kondo

Kenichi Matsunaga

Hiroki Morimura

Shoichi Oshima

Yuichi Higuchi

Toshiki Wada

Mitsuru Harada

Koichi Hadama

Ahmed Musa

An electronic device includes: a housing; an actuator installed inside the housing and configured to generate vibration in response to an application of a driving voltage; a temperature sensor configured to detect an operating temperature caused by the actuator; and a control circuit configured to apply the driving voltage to the actuator to drive the actuator, thereby generating a traction illusion, where the control circuit restricts an operation of the actuator, based on the operating temperature detected by the temperature sensor.

Electronic apparatus and control method

Inside a housing of electronic equipment, a first actuator for generating vibration along a first axis is mounted. The first actuator is mounted in a direction in which the first axis is non-parallel and non-perpendicular to at least one of the six surfaces.

Electronic apparatus that generates illusion of diagonal traction

In a sensor relay apparatus (), a storage unit () stores a communication protocol correspondence list (B) in which a sensor terminal (ST) and a communication protocol are registered in association with each other, and a communication format (C) to be used in the communication protocol, a relay processing unit () communicates with the sensor terminal (ST) specified in the communication protocol correspondence list (B) based on the communication protocol associated with the sensor terminal (ST), receives sensor data detected by the sensor terminal (ST), converts the format of the sensor data based on the communication format (C) in association with the communication protocol, and relays and transfers the sensor data to a processing apparatus (), and a relay managing unit () updates the communication protocol correspondence list (B) or the communication format (C) in the storage unit (), based on a communication protocol correspondence list or a communication format newly notified from the processing apparatus ().

Sensor relay apparatus and sensor relay system

In a sensor relay apparatus (), a communication control unit () receives sensor data from a sensor terminal (ST) via a terminal module () when a transmission data amount related to the sensor data to be transmitted from the sensor terminal (ST) is equal to or greater than a determination threshold. This can reduce the overhead time taken at the time of the transmission of the sensor data.

In a sensor data acquisition terminal (), an NTP back-end processing unit () synchronizes a terminal timing with a parent terminal timing by exchanging NTP packets for time synchronization with a parent terminal () based on NTP, and a protocol conversion unit () converts an NTP packet, which is output from the NTP back-end processing unit () and will be transmitted to the parent terminal (), to a TPSN packet based on TPSN, outputs the TPSN packet to a wireless processing unit (), converts a TPSN packet from the parent terminal (), which is output from the wireless processing unit (), to an NTP packet, and outputs the NTP packet to the NTP back-end processing unit ().

Time synchronization method, sensor data acquisition terminal, and sensor network system

A sensor terminal which processes a sensor signal output from at least one sensor and transmits the sensor signal being processed to a center device through a network control unit and a communication line, includes a communication interface unit capable of being connected to the network control unit, a sensor input interface unit being connected to the sensor and inputting the sensor signal, and a control unit generating sensor data from the sensor signal input through the sensor input interface unit and transmitting sensor data corresponding to a request signal of the center device which is input through the communication interface unit from the network control unit or active sensor data to the center device through the network control unit from the communication interface unit.

Growing community of inventors

Tokyo, Japan

Toshihiko Kondo