Measurement System for a Magnetostrictive Torque Sensor

Abstract

The experimental set up for a magnetostrictive sensor made of NiFe thin film electrodeposited on a cylindrical non magnetic 316L stainless steel rod is presented. The sensor operates inside an AC magnetic field generated by an excitation coil. An amplifier is used to ensure saturation levels in the samples' magnetization. The resulting magnetization is picked up by a sensing coil wound around it in the form of a voltage waveform which is in turn being processed by our LabView® based software. The torque is applied by a specially designed apparatus allowing up to 150 Nm. Preliminary results are presented.

Analysis and Design Optimization of a Compact and Lightweight Joint Torque Sensor for Space Manipulators

“…In recent years, a variety of techniques as optical techniques, magnetic techniques, mechanical oscillator techniques, and surface acoustic wave (SAW) techniques are being developed by different researchers to detect many different physical parameters [11,14,[16][17][18][19][20][21][22][23], including displacement either linear or angular force and torque. Increased research in the field of torque sensing based on these techniques is due to its compact size, lightweight and simple electronics.…”

“…In addition, owing to difficulty to customize commercially available sensors, considerable modifications of joints and links in manipulators are usually needed for assembling purpose. Thus, a variety of torque sensors were designed and developed for robotics systems with acceptable performance by different researchers [11][12][13][14].…”

“…Ktena et al [11] designed a magnetostrictive sensor made of NiFe thin film electrodeposited on a cylindrical nonmagnetic 316 L stainless steel rod. They succeeded in developing a sensor with low cost and wide sensor range of 150 Nm.…”