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Home > Magnetic Pattern Recognition Sensors > Application Guides > Piezoelectric Noise Characteristic


squarePiezoelectric Noise Characteristic
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space When force is applied to the sensor's detecting surface, or when the sensor case has a dent that touches the element, a voltage will be generated. The sensors have a space between the case and the elements to prevent applied force from being conveyed to the elements.
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1. Sensor Structure
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Sensor Structure
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2. Piezoelectric noise factors
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  • The pushing pressure of the transport roller (rubber roller) in contact with the sensor's detecting surface is 0.49 N or more.
  • The material of the transport mechanism that touches the sensor is not rubber, but a hard material such as a leaf spring or plastic.
  • Equipment vibration
  • Impact generated during high-speed transport of target media (paper money)
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space * The sensors have been designed in consideration of the above factors. However, how the applied force is conveyed to the sensor varies depending on the applied force, the sensor mounting method, and the conditions of the equipment. For details, consult Murata Manufacturing Co., Ltd.
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