Design and Construction of an Embedded Digital Teslameter for the Magnetic Characterization of Materials

Ingeniería y Ciencia

Gutiérrez Loaiza, Yhefferson Fernando¹  Velásquez, A. A¹  Baena Rodríguez, Juliana¹ 

[1] Universidad EAFIT, Medellín, Colombia

关键词: teslameter;    Hall effect transducer;    embedded system;   

DOI  :  10.17230/ingciencia.11.21.5

学科分类：工程和技术（综合）

来源: Universidad E A F I T

【 摘 要 】

We present the design, construction and validation of an embedded digital teslameter, intended for use in experiments of magnetic materials characterization by inductive and static methods. The teslameter consists of a planar type Hall effect transducer THS119, with differential output and adjustable measuring range, an INA129P instrumentation amplifier with adjustable gain, a microcontroller PIC16F873A with ADC converter of 10-bits for digital processing, data storage and data transfer to the computer via serial port; and a liquid crystal display to visualize the measurements. The system is adaptable to magnetic field transducers with single or differential output and with different measuring ranges; is sensitive to changes in the intensity and the polarity of the applied magnetic field and has an effective sensitivity of 5.0 mV/mT and uncertainty of 0.5−3T for the THS119 Hall effect transducer. The prototype teslameter was compared with a commercial teslameter PHYWE 13610.90.

【 授权许可】

Unknown