The present disclosure relates to an apparatus and method for estimating a temperature of a motor using a Hall sensor. The method includes detecting, at a digital Hall sensor, a position of a rotor included in a motor and outputting an on signal in an operating period and an off signal in a release period according to a relative position of the rotor, calculating, at a temperature determining module, a difference between duration of the operating period and duration of the release period according to an output waveform of the digital Hall sensor, and then determining, at the temperature determining module, a temperature of the motor with reference to a temperature corresponding to the duration difference. Accordingly, it is possible to estimate the internal temperature of a motor without installing a temperature sensor in the motor, to maintain a small size of the motor, and to reduce production costs.

The present disclosure relates to an apparatus and method for estimating a temperature of a motor using a Hall sensor. The method includes detecting, at a digital Hall sensor, a position of a rotor included in a motor and outputting an on signal in an operating period and an off signal in a release period according to a relative position of the rotor, calculating, at a temperature determining module, a difference between duration of the operating period and duration of the release period according to an output waveform of the digital Hall sensor, and then determining, at the temperature determining module, a temperature of the motor with reference to a temperature corresponding to the duration difference. Accordingly, it is possible to estimate the internal temperature of a motor without installing a temperature sensor in the motor, to maintain a small size of the motor, and to reduce production costs.

A rotor temperature monitoring method and system for a permanent magnet synchronous motor are provided. According to the method and system, an a-phase line current and a b-phase line current of a stator of a permanent magnet synchronous motor are obtained as a first line current and a second line current; further, a line voltage between the a-phase and the b-phase of the stator is obtained and a rotating speed of the rotor of the permanent magnet synchronous motor is obtained; and then, the first line current, the second line current, the line voltage, the rotating speed of the rotor, an inductance parameter of the permanent magnet synchronous motor and a temperature characteristic equation of a permanent magnet of the rotor are substituted into a preset rotor permanent magnet temperature expression to calculate and obtain the temperature of the rotor.

A rotor temperature monitoring method and system for a permanent magnet synchronous motor are provided. According to the method and system, an a-phase line current and a b-phase line current of a stator of a permanent magnet synchronous motor are obtained as a first line current and a second line current; further, a line voltage between the a-phase and the b-phase of the stator is obtained and a rotating speed of the rotor of the permanent magnet synchronous motor is obtained; and then, the first line current, the second line current, the line voltage, the rotating speed of the rotor, an inductance parameter of the permanent magnet synchronous motor and a temperature characteristic equation of a permanent magnet of the rotor are substituted into a preset rotor permanent magnet temperature expression to calculate and obtain the temperature of the rotor.

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 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.

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.

The invention provides a temperature sensor assembly, including: a housing, having a heat transmission portion for directly connecting with a component to be sensed and receiving heat from the component to be sensed; a temperature sensor, disposed in the housing and connected with the heat transmission portion to receive heat from the heat transmission portion; a short-distance wireless communication device, communicatively connected with the temperature sensor, to receive a sensing signal from the temperature sensor and transmit a first output signal corresponding to the sensing signal. Furthermore, the invention also provides a temperature sensing system and a method for using the same.

A printing machine includes: a printing plate attached to a plate cylinder; a blanket configured to transfer ink from the printing plate to a printed material; a blanket wheel configured to rotate the blanket; and at least one of a distance sensor or a temperature sensor. The distance sensor is provided in the blanket wheel and configured to measure a distance of the printing plate to the blanket wheel, and the temperature sensor is provided in the blanket wheel and configured to measure a temperature of the printing plate.