A Novel Minitype Angle Sensor Using a Simple Gear
Angle sensors operating on optical,electric,and magnetic principles are extensively used as transducers in all kinds of position and speed control applications.A novel minitype angle sensor consisting of a specified gear,a magnet,and a tunnel magnetoresistance(TMR)magnetic sensor has been proposed in this paper.The gear is made up with Permalloy,which is constituted the magnetic circuit with the magnet.The TMR magnetic sensor is placed between the gear and the magntic to detective the magnetic field.With the rotation of the gear,the magnet applies an ac magnetic field to the TMR magnetic sensor.The output waveform of the proposed angle sensor has a good sine property,so the angle position can be measured by high-precision techniques for amplitude and phase discrimination.And the angle speed is directly proportional to the waveform”s frequency.At the meanwhile,if the gear appears geometry eccentricity,the output waveform is modulated by a low frequency signal.Through picking up the amplitude of the low frequency signal,the eccentricity of rotating pieces can be determined.As the low frequency signal is related with the gear”s absolute position,so according to the amplitudes or phases of the output waveform and the low frequency signal,the absolute position of the rotating pieces can be measured with advantages in accuracy and resolution.
Angle sensor Position and speed Gear TMR Magnetic field
Wu Zhiyi Wang Shuxian Zheng Fangyan Bian Leixiang Zhang Jitao Peng Donglin
Engineering Research Center for Mechanical Testing Technology and Equipment of Ministry of Eduation, School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing City,210094,Ch College of Electric and Information Engineering,Zhengzhou University of Light Industry,Zhengzhou 450
国内会议
成都
英文
437-441
2016-10-14（万方平台首次上网日期，不代表论文的发表时间）