Magnetoresistive sensor

[Audio] Good day, ms. Melanie Borres. We are going to report our assigned topic which is magnetoresistive sensor. But, first of all let me introduce my self I am Janessa O. Ali together with my partner Ms. Mariel M. Galarpe..

[Audio] So, what is magneto resistive sensor? Magneto resistive sensors are very small components that are designed to sense an applied magnetic field. Because no electrical contact is required, the sensor can operate across a relatively large air gap. To make embedding possible, magnetoresistive sensors are designed to be small and operate on very little power..

[Audio] How Does Magnetoresistive Sensor Works? Magnetoresistive works thru magnetoresistance effect. Magnetoresistance are the changes in the electrical resistance of an magnetoresistive element when a magnetic field is applied across the element. Magnetic sensors use these respective characteristics to convert changes in magnetism into an electrical signal..

[Audio] How To Detect A Magnetic Field? Magneto resistive sensor detects the angle of a parallel magnetic field. For that reason, Magnetoresistive sensors generally have a wider detectable area that absorbs layout error. Produce higher output, higher sensitivity and consistency..

[Audio] Principle of Operation of Magnetoresistive Sensor.

[Audio] Types of Magnetoresistive Sensor Element Semiconductor Magnetoresistive Element ( SMR) – is combined with a bias magnet for its application. This combination shall be used for the range where the rate of resistance change is linear and rather larger comparing to the magnetic flux density change, setting the operation point to 0.4 T or more using the bias magnet. Anisotropic Magnetoresistive Eelement ( AMR) – a change of resistance of ferromagnetic wire, when its magnetization change its direction with respect to current direction. Giant Magnetoresistive Element ( GMR) – is a quantum mechanical magnetoresistance. effect observed in thin film structures composed of alternating ferromagnetic and nonmagnetic layers. Tunnel Magnetoresistive Element ( TMR) – is a magnetoresistive effect that occurs in a magnetic tunnel junction ( MTJ), which is a component consisting of two ferromagnets separated by a thin insulator..

[Audio] What Can A Magnetoresistive Sensor Detect? They detect changes, or disturbances in magnetic fields that have been created or modified by objects or events. The magnetic fields may therefore carry information on properties such as direction, prsesence, rotation, angle, or electrical currents that is converted into an electrical voltage by the magnetic sensor..

[Audio] The Advantages of Magnetoresistive Sensor are; Non contact operation so there is no wear and friction. Hence unlimited number of operating cycles High reliability due to their rugged construction Low and stable offset Due to its high sensitivity it can be used to measure weak magnetic fields Low sensitivity to mechanical stress Much more Insensitive to vibrations than inductive sensors High operating temperature Wide operating frequency range ( 0 Hz to 1 MHz) Can be used in harsh environments Reasonable cost Can measure zero speed Small size Fast response.

[Audio] The Disadvantages of Magnetoresistive Sensor are; Sensitive to interfering magnetic fields. Very strong magnetic field can damage the sensor Temperature drift Limited linear range Poor temperature characteristics.

[Audio] Some of The Applications of Magnetoresistive Sensor are: Wheel Speed Sensors Angle Measurement Linear Displacement Measurement Current Measurement Earth Magnetic Field Detection For Compass And Navigation Applications Metal Detection Magnetic Field Measurement.