International Science Index


Accurate Position Electromagnetic Sensor Using Data Acquisition System


This paper presents a high position electromagnetic sensor system (HPESS) that is applicable for moving object detection. The authors have developed a high-performance position sensor prototype dedicated to students’ laboratory. The challenge was to obtain a highly accurate and real-time sensor that is able to calculate position, length or displacement. An electromagnetic solution based on a two coil induction principal was adopted. The HPESS converts mechanical motion to electric energy with direct contact. The output signal can then be fed to an electronic circuit. The voltage output change from the sensor is captured by data acquisition system using LabVIEW software. The displacement of the moving object is determined. The measured data are transmitted to a PC in real-time via a DAQ (NI USB -6281). This paper also describes the data acquisition analysis and the conditioning card developed specially for sensor signal monitoring. The data is then recorded and viewed using a user interface written using National Instrument LabVIEW software. On-line displays of time and voltage of the sensor signal provide a user-friendly data acquisition interface. The sensor provides an uncomplicated, accurate, reliable, inexpensive transducer for highly sophisticated control systems.

[1] H. Norton, “Transducer fundamentals,” in Handbook of Transducers. Englewood Cliffs, NJ: Prentice Hall, 1989, ch. 2.
[2] G. Kanelas and D. Alman, “New sensors help put pedal to the metal,” SENSORS Mag., pp. 66–69, May 1999.
[3] R. Frodl and D. Schoedlbauer, “Modern concepts for low cost, high performance position sensors,” in SAE Int. Congr. Expo., Detroit, MI, Feb. 23, 1998, pp 980-172.
[4] A. Woerth, H. Winner, and Robert Bosch, “Apparatus for Determining Rotational Position of a Rotatable Element Without Contacting It,” U.S. Patent 5 880 586, Mar. 9, 1999.
[5] K. Dietmayer, “New concepts for contactless angle measurement in au- tomotive applications,” in SAE Int. Congr. Expo., Detroit, MI, Mar. 1, 1999, Paper 1999-01-1040.
[6] A. Madni and R. Wells, “An advanced steering wheel sensor,” SENSORS Mag., pp. 28–40, Feb. 2000.
[7] D. Nyce, “Magnetostrictive linear position sensors,” Sensors Mag., pp. 38–46, Nov. 1999.
[8] L. Brown, R. Ellis, and TRW, “Seat Belt Buckle with Hall Effect Locking Indicator,” U.S. Patent 5 898 366, Apr. 27, 1999.
[9] G. Dehmel, “Magnetic field sensors: Induction coil (search coil) sensors”, Chapter 6 in Sensors – a comprehensive survey, vol. 5, (New York: VCH Publishers), 1989, pp. 205-254.
[10] P. Ripka, “Induction sensors”, Chapter 2 in Magnetic sensors and magnetometers, (Boston, MA: Artech House), 2001, pp. 47-74.
[11] S. Tumanski, “Induction coil sensors a review,” Meas. Sci. Technol., no. 3, pp. R31 – R46, 2007.
[12] Z. Ezzouine, and A. Nakheli, “A Simple Method for Determining Thermal Expansion Coefficient of Solid Materials with a Computer-aided Electromagnetic Dilatometer Measuring System." Sensors & Transducers, Vol. 190, Issue 7, July 2015, pp. 86-91.
[13] Z. Abbassi, A. Benabdellah, A. Nakheli, “Data acquisition and control of a New electromagnetic Force-Displacement Sensor using National Instruments ‘‘LabVIEW’’ Software,” WSEAS Transactions on Circuits and Systems, Vol. 15, 2016, pp. 102-107.