THE CHARACTERIZATION OF GIANT MAGNETORESISTANCE SENSOR FOR BRIDGE DEFLECTION MEASUREMENT
Ahmad Aminudin, Rahayu Dwi Harnum, Mimin Iryanti

Departemen Fisika, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudi No.229 Bandung, Indonesia

Abstract

Displacement measurement is the displacement of objects from the initial state to the final state. Displacement can be done on landslides, building construction, or bridges. One of the sensors used to detect displacement is the GMR sensor. The GMR sensor is a sensor that can detect changes in magnetic fields. The configuratioan of permanent magnet and GMR sensors can be used to detect micro-order displacement. The research method is done by placing permanent magnets on the static and GMR sensors on the moveble part of the bridge. The test results show that the GMR sensor can detect 10micro order. The GMR sensor voltage response to the shift distance is obtained exponentially. Maximum shift test is obtained at half the span of the bridge. This research can be used for monitoring bridge shift.

Keywords: micro order displacement, GMR sensor, voltage response, measurement

Topic: Physics