STRAIN SENSOR AND TENSILE PROPERTY MEASUREMENT METHOD

In a strain sensor, a sensor element formed in a film shape is laminated on one surface of a plate-shaped base plate. The sensor element comprises a piezoelectric film and electrodes laminated on bothsides of the piezoelectric film. The one surface of the base plate is formed to a size such that the laminated sensor element does not protrude outward, and the base plate includes chuck portions onwhich the sensor element is not laminated at both end portions in the tension direction parallel to the one surface. 应变传感器在板状的基板的一个面层叠有形成为膜状的传感器元件。传感器元件具有压电膜和层叠在该压电膜的两面的电极。在基板中，一个面形成为所层叠的传感器元件不伸出到外侧的大小，并且，在与一个面平行的拉伸方向上的两端部具有未层叠传感器元件的夹持部。