Kawasaki Jukogyo Kabushiki Kaisha

Kawasaki Railcar Manufacturing Co., Ltd.

Masayuki Mitsue

Takehiro Nishimura

Yoshi Sato

Teruhisa Nakaoka

Keiichiro Kamura

Yuta Yoshimatsu

Yousuke Tsumura

Akihiko Tada

Katsuyuki Kawashima

Shingo Kuwashiro

Takao Sekiya

Takashi Miyazaki

Kazutsuna Ikeda

Masayuki Enomoto

Ryoji Negi

Tomohei Kobayashi

Fumihide Inamura

Tadao Shimada

Yusuke Nishio

Kyoko Yoshida

Akira Todoroki

A track displacement measurement device is a track displacement measurement device that measures displacement of the track on which a railroad car runs, and determines first displacement of the track by performing processing including an integration operation based on motion detection signal responsive to motion of the railroad car due to displacement of the track, determines second displacement of the track based on the rotational movement detection signal responsive to rotational movement of the railroad car, and determines combined displacement of the track based on the first displacement and the second displacement.

Track displacement measurement device, track displacement measurement system, and track displacement measurement method

A tag configured to detect loosening of a fastening member fastened to a fastened part of an apparatus includes: a base sheet including a fastening member attached portion and a fastened part attached portion, the fastening member attached portion being attached to the fastening member, the fastened part attached portion being attached to the fastened part; a RFID chip mounted on the base sheet; an antenna circuit mounted on the base sheet while being connected to the RFID chip; and an electric conductor mounted on the base sheet while being connected to the RFID chip, the electric conductor being configured such that an electric property of the electric conductor changes when the fastening member is displaced relative to the fastened part attached portion.

Fastening member loosening detection tag

Vibration and temperature sensor with wireless communication function

A state monitoring device for use in a train set constituted by coupling cars each including a carbody and a pair of bogies arranged at both respective longitudinal direction end portions of the carbody and supporting the carbody includes: sensors provided at the respective bogies and configured to detect state information of devices provided at the bogies; wireless transmitters provided at the respective bogies and configured to wirelessly transmit sensor signals containing the detected state information; and at least one wireless receiver configured to receive the sensor signals wirelessly transmitted from the wireless transmitters.

Railcar state monitoring device and train set including same

Provided is a bearing monitoring device of a railcar, the railcar being constituted by coupling a plurality of cars including carbodies and bogies, the bearing monitoring device including: bearing temperature sensors provided at the respective bogies and configured to directly or indirectly detect temperatures of bearings of the bogies; at least one state sensor provided at at least one of the carbodies of the plurality of cars and configured to be used for calculating loads or rotating speeds of the bearings; and a storage unit provided at at least one of the carbodies of the plurality of cars and configured to store data pieces of signals detected by the bearing temperature sensors and the state sensor.

Bearing monitoring device of railcar

A state monitoring device for a plate spring mounted on a railcar bogie is configured to monitor a state of the plate spring, the plate spring including fiber-reinforced resin containing electrically conductive reinforced fibers containing reinforced fibers extending in a longitudinal direction of the plate spring. The state monitoring device includes: an electrode pair provided at both width direction side end surfaces of the plate spring and sandwiching the plate spring, a width direction of the plate spring being perpendicular to the longitudinal direction of the plate spring and a thickness direction of the plate spring; and a measuring unit electrically connected to the electrode pair and configured to measure an electrical characteristic of the plate spring.

State monitoring device for plate spring of railcar bogie

Provided is a bearing monitoring device of a railcar, the bearing monitoring device being configured to monitor a bearing of a bogie supporting a carbody, the bearing monitoring device including: a receiving unit configured to receive a data piece of a temperature of the bearing and at least one of a data piece of a load of the bearing and a data piece of a rotating speed of the bearing; and a diagnostic unit configured to, when a monitoring value exceeds a variable threshold, determine that an abnormality of the bearing has occurred, the monitoring value being at least one of a temperature value and a temperature increase rate, the at least one of the temperature value and the temperature increase rate being obtained from the data piece of the temperature of the bearing received by the receiving unit, wherein when at least one of a value of the data piece of the load and a value of the data piece of the rotating speed decreases, the diagnostic unit lowers the variable threshold.

There is provided a configuration that can precisely detect abrasion of brake shoes of a railway vehicle. A brake shoe abrasion detection unit includes: at least one abrasion detection RF tag that is attached at a position of an abrasion limit of a brake shoe of a railway vehicle tread brake or a position closer to a braking surface than the abrasion limit; and a reference RF tag that is attached at a position beyond the abrasion limit of the brake shoe.

Brake shoe abrasion detection unit of railway vehicle, and brake shoe abrasion detection unit set

A temperature sensor unit-equipped axle box device of a railcar bogie includes: an axle box accommodating a bearing supporting an axle; a temperature sensor unit attached to the axle box and configured to detect a temperature of an outer ring of the bearing; and an elastic body configured to bias the temperature sensor unit in such a direction that the temperature sensor unit is pressed against the outer ring. The elastic body is elastically deformable so as to follow displacement of the temperature sensor unit around a rotation axis of the bearing.

Temperature sensor unit-equipped axle box device and temperature detecting device of railcar bogie

A wireless communication function-equipped temperature sensor unit includes: a temperature sensor; a wireless communication board including a conversion substrate including a conversion circuit configured to convert an analog temperature signal into a digital temperature signal, the analog temperature signal being output from the temperature sensor, and a wireless communication module mounted on the conversion substrate and configured to transmit the digital temperature signal as a wireless signal.

Wireless communication function-equipped temperature sensor unit of railcar bogie

There is provided a configuration in which an association between a location of each brake shoe of a railway vehicle and each abrasion detection tag is easily learned, and system implementation and management are simplified. A brake shoe abrasion detection system of a railway vehicle includes a computer that receives data of a signal read by a reader from at least one abrasion detection RF tag attached to each of a plurality of brake shoes of the railway vehicle passing the reader. The computer determines an association between a plurality of the signals and the plurality of brake shoes based on an order that the reader reads the plurality of signals from a plurality of the abrasion detection RF tags attached to the plurality of brake shoes, respectively.

Brake shoe abrasion detection system of railway vehicle

A method of producing an electrode-equipped plate spring of a railcar bogie includes: a resin removing step of partially irradiating a surface of fiber-reinforced resin, prepared by including electrically conductive fibers in resin, of a plate spring with a laser beam to partially remove the resin and partially expose the electrically conductive fibers; and an electrode forming step of attaching an electrode to an exposed region formed by partially exposing the electrically conductive fibers of the fiber-reinforced resin.

Method of producing electrode-equipped plate spring of railcar bogie

Temperature sensor

A displacement detecting apparatus is provided with a self-position detector for detecting a position and an orientation of the apparatus relative to a preset reference position and a preset reference orientation. Displacement of a rail at an upper surface reference point and a side surface reference point relative to a preset reference position is calculated from imaged image data of the surfaces of the rail using an optical cutting method, and the calculated displacement of the rail is corrected using data obtained from the self-position detector, thereby compensating for errors caused by differences in position and orientation of the apparatus associated with a vehicle running motion. By doing so, the displacement detecting apparatus is superior in maintenance and unlikely to cause measurement errors.

Growing community of inventors

Kobe, Japan

Masayuki Mitsue