| 摘要 |
A seismic switch is a programmable device capable of distinguishing between seismic movements due to an earthquake or an explosion, which is used to send a signal to control panels for security doors. The device uses accelerometers and a microcontroller for the detection and signal analysis of the seismic movements. In the event of an explosion or earthquake, the device produces an alarm. The accelerometers are low G micro machined accelerometers that include signal conditioning, a 2-pole low pass filter and temperature compensation with CMOS signal conditioning ASIC contained in a single integrated circuit sealed hermetically at the wafer level.
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