The means to make a flexible and/or erectable magnetic field response sensor, a geometrically fixed capacitor mounting frame, a wireless dipstick, and an elastically flexible capacitor support have been developed. Either the capacitor mounting frame or the flexible, erectable magnetic field response sensor can be developed to take measurements in hazardous conditions, or in containers with environmentally harmful contents, such as a gasoline storage tank.

The frame has a swivel head, swivel socket, and two through holes. The frame maintains the capacitive wires at a fixed separation, but does not expose a majority of the wire within the frame. A fixed separation is required to allow the capacitive changes to be due only to changes of dielectric exposure (i.e., fluid immersion). Individual frames are stacked such that the swivel head of one is placed in the swivel socket of another. The capacitive wires can be directly connected to a data acquisition system. The advantage is that this can be used to take measurements in complex cavities such as engines. The device can also be easily developed for large containers such as water tanks or underground gas tanks. All but one of the frames is plugged in to prevent exposure. The last frame acts as a probe.

This work was done by Stanley E. Woodard of Langley Research Center, and Bryant Douglas Taylor of Swales Aerospace. LAR-16974-1


NASA Tech Briefs Magazine

This article first appeared in the October, 2014 issue of NASA Tech Briefs Magazine.

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