Boots – shoes – and leggings
Patent
1984-05-02
1987-02-17
Krass, Errol A.
Boots, shoes, and leggings
7386127, 367123, G04F 1000, G01S 380, G01F 132
Patent
active
046444831
ABSTRACT:
An apparatus for determining the transit time of ultrasonic pulses in a fluid has two spaced apart electro-acoustic converters (11, 20). A transmitter signal proportional to the sound pressure is applied via a controllable delay circuit (23) to a multiplication circuit (25) to which the received signal is also passed. The product signal is in turn passed to a transit time detector circuit (10) (FIG. 1).
REFERENCES:
patent: 3588699 (1971-06-01), Pysnik
patent: 3906213 (1975-09-01), Meriaux et al.
patent: 4053888 (1977-10-01), Robin et al.
patent: 4279019 (1981-07-01), Heyser
patent: 4334431 (1982-06-01), Kohno et al.
patent: 4375900 (1983-03-01), Tachibana et al.
patent: 4494213 (1985-01-01), Thompson
patent: 4510587 (1985-04-01), Schneider
patent: 4557148 (1985-12-01), Akiyama
patent: 4576047 (1986-03-01), Lauer et al.
patent: 4598593 (1986-07-01), Sheen et al.
Knapp et al, "The Generalized Correlation Method for Estimation of Time Delay", IEEE Trans. on Acoustics, Speech and Sig. Proc., vol. ASSP-24, No. 4, Aug. 1976, pp. 320-327.
Maiwald, "Blockwise Updating in Decision-Aided Timing Recovery", IBM Tech. Disc. Bull., vol. 19, No. 12, May 1977, pp. 4782-4784.
Hartmann Werner
Lauer Reinhard
Dixon Joseph L.
Erwin Sick GmbH - Optik-Elektronik
Krass Errol A.
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