A Non-Invasive Thermal Drift Compensation Technique Applied to a Spin-Valve Magnetoresistive Current Sensor
| Autor: | Diego Ramírez Muñoz, Silvia Casans Berga, Paulo P. Freitas, Asuncion Edith Navarro Anton, Susana Cardoso, Jaime Sánchez Moreno |
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| Rok vydání: | 2011 |
| Předmět: |
Engineering
Wheatstone bridge Spin valve magnetoresistance sensor lcsh:Chemical technology Biochemistry Article Ruthenium temperature compensation Analytical Chemistry Compensation (engineering) law.invention Magnetics law electrical current measurement Electric Impedance lcsh:TP1-1185 Current sensor Electrical and Electronic Engineering spin-valve sensor Instrumentation business.industry Temperature Electrical engineering Equipment Design Atomic and Molecular Physics and Optics Optoelectronics Constant current Current (fluid) business Fiber optic current sensor Sensitivity (electronics) |
| Zdroj: | Sensors (Basel, Switzerland) Sensors Volume 11 Issue 3 Pages 2447-2458 Sensors, Vol 11, Iss 3, Pp 2447-2458 (2011) |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s110302447 |
| Popis: | A compensation method for the sensitivity drift of a magnetoresistive (MR) Wheatstone bridge current sensor is proposed. The technique was carried out by placing a ruthenium temperature sensor and the MR sensor to be compensated inside a generalized impedance converter circuit (GIC). No internal modification of the sensor bridge arms is required so that the circuit is capable of compensating practical industrial sensors. The method is based on the temperature modulation of the current supplied to the bridge, which improves previous solutions based on constant current compensation. Experimental results are shown using a microfabricated spin-valve MR current sensor. The temperature compensation has been solved in the interval from 0 °C to 70 °C measuring currents from −10 A to +10 A. |
| Databáze: | OpenAIRE |
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