Electricity: measuring and testing – Magnetic – Displacement
Patent
1989-03-21
1990-04-10
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Displacement
328151, 328167, 34087036, G01B 714, H04B 1500, G08C 1908, G01G 1900
Patent
active
049163914
ABSTRACT:
To weigh objects in quick succession, the objects are projected with a known horizontal velocity onto a ramp which has a surface which curves down through 90.degree.. The ramp can move horizontally in response to the impulse corresponding to the change in horizontal momentum of the object. A transducer senses the movement of the ramp and the output horizontal velocity of the object is sensed, enabling the change in horizontal velocity to be calculated. The mass of the object is calculated from the horizontal movement of the ramp and the change in horizontal velocity of the object. In order to obtain accurate sensing of the movement of the ramp, the transducer is a linear variable differential transformer having a primary winding energized by a cyclical carrier signal and two matched secondary windings in series; the secondary winding output signal is rectified to a corresponding DC voltage having ripple components, and a sample is taken of the signal at the zero voltage of the principal ripple component.
REFERENCES:
patent: 2694310 (1954-11-01), Pounds
patent: 2880407 (1959-03-01), Comstock, III
patent: 3238383 (1966-01-01), Falk
patent: 3545611 (1970-12-01), Husome
patent: 3595329 (1971-07-01), Withnell et al.
patent: 3619794 (1971-11-01), Richman
patent: 3712395 (1973-01-01), Streater et al.
patent: 3717818 (1973-02-01), Herbst
patent: 3733445 (1973-05-01), Sebesta et al.
patent: 3805904 (1974-04-01), Zimmerer
patent: 3834474 (1974-09-01), Knol
patent: 3967497 (1906-07-01), Brown
patent: 4013961 (1977-03-01), Colebourn
patent: 4031479 (1977-06-01), Thomas, Jr. et al.
patent: 4050530 (1927-09-01), Storace
patent: 4100480 (1978-07-01), Lytle et al.
patent: 4104920 (1978-08-01), Albert et al.
patent: 4115923 (1978-09-01), Smith et al.
patent: 4143726 (1979-03-01), Wilson
patent: 4176118 (1979-11-01), Petinaux et al.
patent: 4216837 (1980-08-01), Pryor et al.
patent: 4303883 (1981-12-01), Mori et al.
patent: 4305132 (1981-12-01), Tsuboshima et al.
patent: 4450443 (1984-05-01), Dolland
patent: 4500837 (1985-02-01), Shuey et al.
patent: 4599560 (1986-07-01), Sanford et al.
patent: 4651034 (1987-03-01), Sato
patent: 4757265 (1988-07-01), Peacher
"Measurement and Control", GB vol. 12, Feb., Mar., Apr. & May 1979, pp. 55, 113, 114, 146-147 and 194, an article by Al Brendel entitled High Speed Check Weighing.
"Measurement and Control" GB vol. 13, No. 7, Feb. to May 1979, Jul. and Aug. 1980, pp. 242-243 and 275-277, an article by Al Brendel entitled A Survey of Digital Transducer Instruments Used in the Weighing Industry.
"Advances in Flextensional Transducer Design" by Marshall, Pagliarini & White, indexed as CH1478-7/79/0000-0124, 1979 IEEE (also referred to in Abstracts B800 21688 and A800 43588, compedec).
"Recent Improvements in Electronic Techniques for Determining Weight Increments", by F. Lafay, referred to in Abstract B750 30568 of Compedec file 13 and also referenced in 795120 and 374029.
Clarke Ian
Doerman Eryk S.
Homer David A.
Stewart Andrew D. G.
Turner William J.
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