Application Guide of Magnetic Pattern Recognition Sensors
Speed/Response Characteristic
Unlike coil-type sensors, Murata magnetic pattern recognition sensors' output voltage does not depend on the target traveling speed, enabling the medium transport mechanism for the equipment to be more freely designed.
Because of the multiple carrier conduction phenomena, the magnetoresistive element provides an excellent frequency characteristic of several MHz order, which is suitable for high-speed processing devices.
- Murata magnetic pattern recognition sensors convert a change in magnetic flux density into a resistance value. The output voltage is proportional to the power supply voltage and the change in resistance.
Vout = fluctuation R Vin (fluctuation R: Resistance incremental ratio in the voltage division circuit using two resistance elements, Vin: Power supply voltage)
- Electromotive force of coil sensorsis proportional to the rate of change in magnetic flux density through the coil.
Murata Sensor: Speed/Output Model (Active)
Coil Sensor: Speed/Output Model (Passive)
- InSb magnetoresistive elements are used for active sensors.
- Output voltage of active sensorsis stable, regardless of any change in medium transport speed.
- Performance of Murata sensors has been proven in the field where target media (paper money) are transported at a speed of 2000mm/s.
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Application Guide of Magnetic Pattern Recognition Sensors
