Design, Construction and Performance Analysis of Dynamic Torque Transducer

Abstract

Most of the dynamic Torque measurement devices present are not easy to afford and accurate for higher shaft speed, at the same time. To fulfil the lack of standard device, this research concentrated on fabricating non- contact torque transducer device using easily accessible materials. The research primarily focuses on developing electronics and mechanical systems required to measure dynamic torque. Hollow Aluminum shaft is taken as torque transducer specimen with coupling facility. Strain gauges are attached on surface of specimen shaft in Wheatstone bridge arrangement such that strain gauge produce potential difference while the shaft experiences strain. Arduino NANO as I/O device, HX711 ADC module as signal amplifier, HC05 as Bluetooth module for wireless measured signal communication. For calibration, Torque is applied to specimen by coupling it with motor generator dynamic torque measurement apparatus (DL 10055ETM) which manufacture by DE LORENZO. Linear regression is used to predict value of applied torque. The torque transducer device is calibrated by applying different torque value under variable rotational speed of shaft. Consistency of data under varying speed for a particular torque is analyzed by plotting the data obtained during calibration, in graph. For a particular rotational speed and applied torque, strain signal transmitted by Bluetooth module of Arduino arrangement is recorded and obtained values are plotted in graph against applied torque. Linear approximation of the obtained relation, in MATLAB software, gave calibrated relation between torque and strain gauge sensor signal. Measurement of dynamic torque at high rotational speed, using locally available resources was deemed possible based on consistent data received during the project implementation. The data obtained from the prepared torque transducer is real time and accessible digital data, which makes it easier to analyze the data, perform real time calibration and further integrate with feedback system.