2 results about "Hall element" patented technology

The invention discloses a magnetoelectric type absolute position sensor with a large central hole structure and a method for measuring an absolute position, relates to the field of robot control, and aims to solve the problems of complicated structure, large size, low measurement accuracy of the absolute position and low reliability of an existing position sensor. According to the magnetoelectric type absolute position sensor, a magnetic ring, a magnetic ring seat and a circuit board are of an annular structure; the magnetic ring is attached to the magnetic ring seat; the magnetic ring and the magnetic ring seat form a magnetic code disk; a gap is reserved between the magnetic code disk and the circuit board, and the magnetic code disk and the circuit board are coaxially and oppositely mounted; the circuit board is fixedly arranged on a stator shell; an outer ring main code channel and an inner ring cursor code channel are arranged on the upper surface of the magnetic ring respectively; an acquisition chip and a signal processing circuit are integrated on the circuit board; a Hall element is integrated in the acquisition chip and is used for acquiring the magnetic pole change information of the outer ring main code channel and the inner ring cursor code channel; magnetic field change information is processed by the signal processing circuit, and absolute position information is output. The magnetoelectric type absolute position sensor can be used for accurately measuring the rotating angle and the rotating speed of a light mechanical arm joint and controlling a motor.

The invention relates to a Hall type magnetic fluid acceleration sensor. The Hall type magnetic fluid acceleration sensor comprises a left end cover, a second permanent magnet, a shell body, a first Hall element, a first permanent magnet, a second Hall element, a third permanent magnet, a right end cover and magnetic liquid, wherein the shell body is of a cylindrical tubular structure, the first permanent magnet is arranged in the middle of interior of the shell body, and both ends of the first permanent magnet are adsorbed with the magnetic liquid in a saturated manner; the second permanent magnet is placed at a left port of the shell body, and a third permanent magnet is placed at a right port of the shell body; and both ends of the shell body are provided with the left end cover and the right end cover separately through threaded connection. The Hall type magnetic fluid acceleration sensor adopts the permanent magnets fixed on both ends of the shell body to provide restoring forces for intermediate inertia mass, the measuring range and measuring sensitivity of the sensor can be adjusted by changing parameters of the permanent magnets on both ends, different requirements on the measuring range and measuring sensitivity of the sensor on different occasions can be met, and the adaptability of the sensor is improved.