Abstract: The present invention proposes a system, comprising intelligent switches (1-9), which are embedded on wall surface near entrance on each floor, possessing display unit with touch panel on the front, displaying and outputting the selection menu and the information from the display screen, an information processing unit (10) connected with each of the intelligent switches through the communication line and sending, receiving and processing the information, and the regulatory systems (35-37) in the building. The control signals of the regulatory systems (35-37) in the building are input and the information from the information processing unit (10) is output by the display plate with touch panel (6) of the intelligent switch. According to this system, it is possible to install the intelligent switch system by embedding it in the wall surface near an entrance on each floor, to offer the necessary information such as messages, news, information, etc. and to control the regulatory systems in the building.

Abstract: The invention relates to a piezoelectric acceleration sensor and to a piezoelectric acceleration device which use a film piezoelectric element.Speicfically, the piezoelectric acceleration sensor and the piezoelectric acceleration sensor device generate relatively large outputs when acceleration occurs along the sensing axis, but produce relatively small outputs from acceleration perpendicular to the sensing axis. In addition, the sensor and the sensor device are relatively unaffected by temperature fluctuations and are highly impact-resistant.