Various systems, devices, and methods for a vehicle smart brake pad comprising a sensor such as a force sensing device, and a production process thereof. For example, a production process of a vehicle brake pad can include the following steps in time sequence: applying an electrical circuit a support plate; screen printing on the electrical circuit of at least a first electrode; screen printing on the at least first electrode of a sheet of piezoelectric material; screen printing on the sheet of at least a second electrode; applying a friction pad on the support plate; and bulk polarizing the sheet of piezoelectric material by a supply of power to the at least first and second electrodes.

The present disclosure includes the use of a smart load cell in a system for controlling an electromechanical actuator. A load cell may be positioned along the outer surface of the electromechanical actuator. Further, the load cell may utilize strain gages and a microcontroller. The load cell may be configured to transmit data to an electric brake actuator controller which includes calibration for operating temperature of the electromechanical actuator.

The present disclosure includes the use of a smart load cell in a system for controlling an electromechanical actuator. A load cell may be positioned along the outer surface of the electromechanical actuator. Further, the load cell may utilize strain gages and a microcontroller. The load cell may be configured to transmit data to an electric brake actuator controller which includes calibration for operating temperature of the electromechanical actuator.

A method and a system for monitoring wear of a braking frictional pad of a vehicle including a hydraulic brake device acting on a wheel thereof, the hydraulic brake device having a brake disc rotatable with the wheel and a braking frictional pad configured to be non-rotatable relative to the wheel and be linearly movable parallel to a rotational axis of the wheel, the system including: a record module configured to record a time required by the hydraulic brake device for establishing a brake hydraulic pressure when the vehicle is parked; and an electrical control unit in data communication with the record module and configured to compare the time required for establishing the brake hydraulic pressure with a time required by the same hydraulic brake device for establishing the brake hydraulic pressure and recorded when the braking frictional pad is brand new, so as to determine the wear state of the braking frictional pad.

Provided is an electric parking brake device in which a drum brake includes braking gap automatic adjustment means and a parking brake lever, and the operation of an electric actuator that drives the parking brake lever is controlled by a control unit. When an application operation time of the electric actuator (38) by the time when a parking brake state is obtained has exceeded a predetermined application operation end determination time (T2), the control unit (C) determines that the braking gap automatic adjustment means (18) is abnormal. With this configuration, at the time of obtaining the parking brake state, the presence or absence of abnormality in the braking gap automatic adjustment means can be determined.

Provided is an electric parking brake device in which a drum brake includes braking gap automatic adjustment means and a parking brake lever, and the operation of an electric actuator that drives the parking brake lever is controlled by a control unit. When an application operation time of the electric actuator (38) by the time when a parking brake state is obtained has exceeded a predetermined application operation end determination time (T2), the control unit (C) determines that the braking gap automatic adjustment means (18) is abnormal. With this configuration, at the time of obtaining the parking brake state, the presence or absence of abnormality in the braking gap automatic adjustment means can be determined.

A temperature sensing device for sensing aircraft wheel brake temperature, the temperature sensing device including a surface acoustic wave, SAW, sensor element with a resonant frequency within a frequency range between 175 megahertz and 190 megahertz at a predetermined temperature. The temperature sensing system also includes a wireless relay device, a method for sensing temperature of a wheel brake of an aircraft.

A temperature sensing device for sensing aircraft wheel brake temperature, the temperature sensing device including: a surface acoustic wave (SAW) sensor element having an interdigital transducer that has electrodes disposed along the surface of a substrate forming a periodic structure. The electrodes having a thickness, in a direction perpendicular to the surface, of between 120 and 190 nanometres.

A temperature sensing device for sensing aircraft wheel brake temperature, the temperature sensing device including: a surface acoustic wave (SAW) sensor element having an interdigital transducer that has electrodes disposed along the surface of a substrate forming a periodic structure. The electrodes having a thickness, in a direction perpendicular to the surface, of between 120 and 190 nanometres.

A temperature sensing device to sense aircraft wheel brake temperature is disclosed including a sensing device substrate; and one or more package layers attached to the sensing device substrate, wherein: the sensing device substrate carries one or more electronic components for sensing temperature. Also disclosed is a wireless relay device to wirelessly transmit an interrogation signal to a temperature sensing device and wirelessly receive an output signal from the temperature sensing device, the temperature sensing device to sense aircraft wheel brake temperature, the wireless relay device comprising: a relay substrate; and one or more package layers attached to the relay substrate, wherein: the relay substrate carries one or more electronic components of the wireless relay device. Also disclosed is a method of manufacturing a temperature sensing device to sense aircraft wheel brake temperature.