Pressure-sensitive detection method, pressure-sensitive sensor, pressure-sensitive detection device, and pressure-sensitive detection system

In this pressure-sensitive detection method and this pressure-sensitive sensor: one or multiple piezoelectric layers each having a pressure input surface part are provided in an area for detecting a pressure input; at least one electrode of one or multiple pairs of electrodes, which are arranged across the piezoelectric layers, is used as a pattern electrode provided with a continuous electrode part or multiple electrode parts narrower than the pressure input surface part; the pattern electrode receives a pressure input; and a pressure-sensitive output is taken out. Accordingly, an insensitive region can be reduced from the pressure input surface part, whereby detection efficiency can be enhanced. Furthermore, there is no need of a contact point or no need to keep a distance between contact points by using elasticity. Thus, the pressure-sensitive sensor can be reduced in size and weight, no contact point deteriorates over time, stable pressure-sensitive detection can be performed over a long period of time, and reduction in maintenance cost can be achieved.