| abstract |
The sensor-equipped cushioning material 1 includes a resin sheet 4 made of a photoelastic resin, a cushioning material 21 laminated on the resin sheet 4, and a light emitting unit 5 and a light receiving unit 8 that face each other so as to sandwich the resin sheet 4. An optical sensor 15 and a processing unit 3 that detects a stress applied to the resin sheet 4 based on an optical signal detected by the optical sensor 15 are provided. |