Pulsed torque, force or general measurement with a coil and a magnetic field sensor (tangentially, circumferentially)

For example, it is the method of measuring the torque in the portion of a shaft (210), and AC activation is carried out so that the polar magnetic field of the police box to which at least one coil (212) wound around the surroundings of the axis in which torque is impressed emits the ingredient of torque dependence may be generated into the portion. Magnetic field sensor placement (218) generates the signal which answers the emitted ingredient and shows torque. At least one coil is the polarity of a police box, and is activated by the activation current pulse sequence (220) which has a small duty cycle relatively. Sensor placement generates the sensor pulse of the police box corresponding to an activation pulse, and a sensor pulse is measured in the form of a peak two peak, and generates the output signal showing torque.