초록 ▼

A tornado warning system having means for monitoring seismic waves of a predetermined frequency range including long-period seismic waves and short-period seismic waves. The seismic waves are associated with and produced in the ground as a result of an approaching tornado. The warning system compris

A tornado warning system having means for monitoring seismic waves of a predetermined frequency range including long-period seismic waves and short-period seismic waves. The seismic waves are associated with and produced in the ground as a result of an approaching tornado. The warning system comprises means for detecting the seismic waves including the long-period seismic waves and the short-period seismic waves and for providing an electrical output indicative thereof. Circuit means are provided for processing the electrical output to provide an output signal indicative of the long-period seismic waves and the short-period seismic waves. Alarm means are provided for receiving the output signal from the circuit means to generate an alarm to warn of the presence of a tornado.

대표청구항 ▼

[ We claim:] [1.] A tornado warning system having means for monitoring seismic waves of a predetermined frequency range including long-period seismic waves and short-period seismic waves, said seismic waves being associated with and produced in the ground as a result of an approaching tornado, said

[ We claim:] [1.] A tornado warning system having means for monitoring seismic waves of a predetermined frequency range including long-period seismic waves and short-period seismic waves, said seismic waves being associated with and produced in the ground as a result of an approaching tornado, said warning system comprising:means for detecting said seismic waves including said long-period seismic waves and said short-period seismic waves and for providing an electrical output indicative thereof;circuit means for processing said electrical output to provide an output signal indicative of said long-period seismic waves and said short-period seismic waves; andalarm means for receiving said output signal from said circuit means to provide an alarm to warn of the presence of a tornado.