Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Patent
1988-12-16
1991-02-19
Strecker, Gerard R.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
73304R, 324647, 324 711, 340620, G01N 2700
Patent
active
049947494
ABSTRACT:
A fuel or fluid level measurement arrangement for a spacecraft includes one or more electromagnetic transmission lines extending into the reservoir. The presence of fuel adjacent the transmission line changes the dielectric constant or loss characteristics of the transmission line(s) in a measurable manner. In one embodiment, strip transmission lines extend parallel to the fluid surface at various degrees of ullage, and the fuel level can be established to within the spacing between the transmission lines.
REFERENCES:
patent: 3935739 (1976-02-01), Ells
patent: 4003259 (1977-01-01), Hope
patent: 4510436 (1985-04-01), Raymond
patent: 4543823 (1985-10-01), Nagy et al.
patent: 4599888 (1986-07-01), Hufton et al.
patent: 4754214 (1988-06-01), Bramanti et al.
patent: 4786857 (1988-11-01), Mohr et al.
patent: 4799174 (1989-01-01), Kramer et al.
IEEE Standard Dictionary of Electrical and Electronic Terms, Second Edition, ANSI/IEEE Std 100-1977, pp. 83, 84, and 739.
Davies Keith
Meise William H.
Berard Jr. Clement A.
General Electric Company
Meise William H.
Mueller Robert W.
Strecker Gerard R.
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