Human body detection device, bed device, and human body detection system

A human body detection device comprising:

• line-shaped piezoelectric substrates respectively provided in each of a plurality of regions in a plate material intersecting a direction of pressure received from a human body, and provided such that an axial direction of each of the piezoelectric substrates runs along the plate material so as to detect pressure applied in a radial direction of the piezoelectric substrate;
• a pressing section running along the plate material so as to contact the piezoelectric substrates and be pressed by contact with the human body;
• a plurality of shock absorbing materials that are in contact with the piezoelectric substrates for each piezoelectric substrate and are disposed on an opposite side from the pressing section with the piezoelectric substrates therebetween, wherein each of the plurality of shock absorbing materials is smaller than a respective region of the plurality of regions, and wherein the shock absorbing materials are placed separately from each other;
• memory;
• and
• a processor coupled to the memory, the processor being configured to be capable of detecting an output signal from each of the piezoelectric substrates.