Patent ID: 6960911
Filing Date: 2005-11-01
Classification: G01L

Abstract:
1. A strain sensor comprising: a sensor section having a conductor and a first magnetic material provided on one surface of the conductor, the magnetic material having a negative magnetic strain constant with a value of −5×10 a fixing mechanism which holds the sensor section so as to allow a central portion of the sensor section to be deformed in response to stress, and fixes an entire periphery of the sensor section; an inductor disposed to face a surface of the sensor section which is opposite a surface on which the first magnetic material is provided, the inductor being disposed away from the sensor section; and a detection unit which detects an amount of deformation of the sensor section based on a change in inductance of the inductor, wherein magnetic permeability of the first magnetic material changes based on the amount of deformation, and increases when the first magnetic material contracts as a result of stress applied to the sensor section.