A temperature sensing device for sensing aircraft wheel brake temperature is disclosed including a sensor antenna electrically coupled to a surface acoustic wave, SAW, sensor element, wherein: the sensor antenna comprises a conductive loop disposed on a surface of a substrate, the conductive loop surrounding an attachment region of the substrate, the attachment region having substantially no conductor material thereon. Also disclosed is a brake disc for an aircraft wheel brake comprising the temperature sensing device, and aircraft comprising the brake disc and a method of manufacturing a temperature sensing device.

A holder for a wireless relay device is disclosed including a rigid hollow arm member to be received in a groove in a torque tube spline of an aircraft wheel brake; and a support member to support the wireless relay device, the support member mechanically coupled to the rigid hollow arm member towards a first end of the rigid hollow arm member, wherein: the rigid hollow arm member provides a conduit for a communications cable to couple to the wireless relay device. Also disclosed is an aircraft wheel brake comprising the holder and an aircraft comprising the aircraft wheel brake.

A brake disc for an aircraft wheel brake including: a temperature sensing device comprising a surface acoustic wave (SAW) sensor element and a sensor antenna, wherein the temperature sensing device is attached to the brake disc by means of a ceramic adhesive and one or more ceramic bolts. A method of attaching a temperature sensing device to a brake disc of an aircraft wheel brake.

A brake disc for an aircraft wheel brake including: a temperature sensing device comprising a surface acoustic wave (SAW) sensor element and a sensor antenna, wherein the temperature sensing device is attached to the brake disc by means of a ceramic adhesive and one or more ceramic bolts. A method of attaching a temperature sensing device to a brake disc of an aircraft wheel brake.

A brake caliper diagnostic device for railway vehicles according to an embodiment of the present disclosure includes an internal pressure sensor located between a brake hose for delivering brake oil or compressed air to the brake caliper and an inlet of the brake caliper, internal temperature sensors respectively installed in the air breathers respectively located above and below the brake caliper, an assembly plate temperature sensor located adjacent to a brake pad assembly, a piston temperature sensor located on a surface of a brake caliper body adjacent to a piston, and a brake caliper monitoring device configured to determine whether or not the brake caliper is abnormal, based on data received from the internal pressure sensor, the internal temperature sensors, the assembly plate temperature sensor, and the piston temperature sensor.

A brake caliper diagnostic device for railway vehicles according to an embodiment of the present disclosure includes an internal pressure sensor located between a brake hose for delivering brake oil or compressed air to the brake caliper and an inlet of the brake caliper, internal temperature sensors respectively installed in the air breathers respectively located above and below the brake caliper, an assembly plate temperature sensor located adjacent to a brake pad assembly, a piston temperature sensor located on a surface of a brake caliper body adjacent to a piston, and a brake caliper monitoring device configured to determine whether or not the brake caliper is abnormal, based on data received from the internal pressure sensor, the internal temperature sensors, the assembly plate temperature sensor, and the piston temperature sensor.

A brake apparatus for a vehicle may include: a first driver and a second driver each configured to generate a driving force; a transfer gear part rotated by the driving force received from the first driver; a piston part configured to press or release a pad part according to the direction in which the piston part is moved forward or backward; a parking gear part rotated with the transfer gear part; a constraint part moved forward or backward by the driving force of the second driver, and configured to constrain the rotation of the parking gear part by being moved to one side during parking braking; and a locking part configured to transfer the driving force, generated by the second driver, to the constraint part, and to restrict the constraint part from moving to the other side during parking braking.

A brake apparatus for a vehicle may include: a first driver and a second driver each configured to generate a driving force; a transfer gear part rotated by the driving force received from the first driver; a piston part configured to press or release a pad part according to the direction in which the piston part is moved forward or backward; a parking gear part rotated with the transfer gear part; a constraint part moved forward or backward by the driving force of the second driver, and configured to constrain the rotation of the parking gear part by being moved to one side during parking braking; and a locking part configured to transfer the driving force, generated by the second driver, to the constraint part, and to restrict the constraint part from moving to the other side during parking braking.

An abnormality diagnosis method that diagnoses abnormality of a braking unit included in a prescribed apparatus that includes: the braking unit including a pressing member, an urging member that urges the pressing member toward an actuator, and an attraction device that releases an urging state of the pressing member that is pressed by the urging member; and a controller configured to control braking by the braking unit and that changes operation programs each including a plurality of operation steps, based on an attraction time period when the pressing member is separated from the actuator to release braking. The abnormality diagnosis method includes: a step of the prescribed apparatus calculating the attraction time period when the prescribed apparatus executes prescribed operation steps associated with corresponding operation programs; and a step of diagnosing abnormality of the braking unit based on the calculated attraction time period.

An abnormality diagnosis method that diagnoses abnormality of a braking unit included in a prescribed apparatus that includes: the braking unit including a pressing member, an urging member that urges the pressing member toward an actuator, and an attraction device that releases an urging state of the pressing member that is pressed by the urging member; and a controller configured to control braking by the braking unit and that changes operation programs each including a plurality of operation steps, based on an attraction time period when the pressing member is separated from the actuator to release braking. The abnormality diagnosis method includes: a step of the prescribed apparatus calculating the attraction time period when the prescribed apparatus executes prescribed operation steps associated with corresponding operation programs; and a step of diagnosing abnormality of the braking unit based on the calculated attraction time period.