A Novel Permanent Magnetic Angular Acceleration Sensor

Abstract

Angular acceleration is an important parameter for status monitoring and fault diagnosis of rotary machinery. Therefore, we developed a novel permanent magnetic angular acceleration sensor, which is without rotation angle limitations and could directly measure the instantaneous angular acceleration of the rotating system. The sensor rotor only needs to be coaxially connected with the rotating system, which enables convenient sensor installation. For the cup structure of the sensor rotor, it has a relatively small rotational inertia. Due to the unique mechanical structure of the sensor, the output signal of the sensor can be directed without a slip ring, which avoids signal weakening effect. In this paper, the operating principle of the sensor is described, and simulated using finite element method. The sensitivity of the sensor is calibrated by torsional pendulum and angle sensor, yielding an experimental result of about 0.88 mV/(rad·s−2). Finally, the angular acceleration of the actual rotating system has been tested, using both a single-phase asynchronous motor and a step motor. Experimental result confirms the operating principle of the sensor and indicates that the sensor has good practicability.

Biaxial Angular Acceleration Sensor with Rotational-Symmetric Spiral Channels and MEMS Piezoresistive Cantilevers

“…Against this background, several angular acceleration sensors have been developed [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. For example, some angular acceleration sensors use an individual solid mass structure as the sensor element as well as linear acceleration sensors [ 8 , 9 , 10 , 11 , 12 ].…”

“…Against this background, several angular acceleration sensors have been developed [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. For example, some angular acceleration sensors use an individual solid mass structure as the sensor element as well as linear acceleration sensors [ 8 , 9 , 10 , 11 , 12 ]. Other angular acceleration sensors utilize the inertial forces acting on fluid in a circular channel as the detection target [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ].…”

Monitoring Traffic Information with a Developed Acceleration Sensing Node

“…More recently, accelerometer technologies have been substantially improved in terms of sensitivity, frequency response, physical size, and power consumption [ 11 , 12 , 13 , 14 , 15 ]. Due to these advantages, accelerometers are considered to be ideal candidates to monitor the pavement for wide-area instrumentation [ 16 , 17 ].…”

Sequential fault detection for sealed deep groove ball bearings of in-wheel motor in variable operating conditions

“…Currently, many literatures are concerned with fault diagnosis of motor [1][2][3][4][5][6][7]. An intelligent diagnosis based on an adaptive neuro-fuzzy inference system was presented to identify electrical faults of in-wheel motor [1].…”

“…The parameter estimation method of a multipole permanent magnet synchronous motor (PMSM) was presented to solve interturn short circuit fault [2]. A novel permanent magnetic angular acceleration sensor was developed to measure the instantaneous angular acceleration for status monitoring and fault diagnosis of a single-phase asynchronous motor [3]. A symbolic dynamic method is presented for health monitoring of permanent magnet synchronous motors (PMSMs), which involves abstraction of a qualitative description from a dynamical system representation of the PMSM [4].…”