Earthquake alarm
A technology of an alarm and an alarm unit is applied in the field of alarms to achieve the effects of small casualties, small size, and safe and reliable use.
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[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0023] Such as figure 1 As shown, the earthquake alarm of the present invention includes a main control unit 110 , a low-pass filter amplification unit 140 , a preamplification unit 130 , a gear setting unit 150 and an alarm unit 160 . The main control unit 110 is connected to the gear position setting unit 150 and the alarm unit 160 , and the main control unit 110 is connected to the acceleration measurement unit 120 through the low-pass filter amplification unit 140 and the preamplification unit 130 in sequence.
[0024] Such as figure 2 As shown, the main control unit 110 includes a single-chip microcomputer U1, and the single-chip microcomputer U1 may adopt a C8051F350 chip. The main control unit 110 is provided with a single-chip microcomputer manual reset key S2 and a user clear alarm key S1. The gear setting unit 150 is a gear adjusting device for...
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