Boots – shoes – and leggings
Patent
1988-01-19
1990-03-06
Gruber, Felix D.
Boots, shoes, and leggings
340552, 340556, G08B 1318, G08B 1324
Patent
active
049071750
ABSTRACT:
A monitoring device comprises a transmitter and a receiver for transmitting and receiving, respectively, a signal in a medium to be monitored. During a cycle of m sampling periods n sampling values are taken of the signal received during each sampling period. After completion of each cycle a series of n means sampling values is determined by determining a mean value from the m sampling values taken at corresponding instants in the sampling periods. This series forms an actual pattern word which is sub-divided into sub-pattern words, each sub-pattern word being combined with a corresponding sub-pattern word from a reference pattern word in order to form a combination word. The combination word is translated into a code number which is selected from a predetermined series of code numbers. The code number assigned characterizes the time shift of the actual sub-pattern word with respect to the reference pattern word. For each cycle there is determined a series of sum numbers which represent how many times each code number has been assigned. This series of sum numbers is tested with respect to a criterion. If one or more sum numbers of the series exceeds the limit value given, a signal is generated, for example an alarm signal.
REFERENCES:
patent: 4124848 (1978-11-01), Clark et al.
patent: 4166273 (1979-08-01), Riley, Jr. et al.
patent: 4225859 (1980-09-01), Zetting et al.
patent: 4605922 (1986-08-01), Blattman et al.
patent: 4760381 (1988-07-01), Haag
Hogeweg Erwin
Van Alphen Antonius W. C. M.
Gruber Felix D.
Miller Paul R.
U.S. Philips Corporation
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