Lightweight UXO system Concept design For Berkeley Geophysics Concept design For Berkeley Geophysics

12/4/2015Robin Lafever2 Frank, Ugo, Here is my take on the UXO hand held, rendered as a small cart. The intent was to address this as a design for manufacture, rather than a Lab prototype. The primary focus is on field operation and the attendant requirements for simplicity, and robustness. This concept reflects a more final production concept than usual (without details). And I addressed operational requirements such as cost-per-unit, manufacturability, robustness, field-repair and parts change. The concept presented has three main features: 1. It assumes a high degree of integration, i.e. mechanical and electronic components are co-developed into integrated assemblies. 2. Tx and Rx fabrication can produce dimensionally consistent, self-supporting coils, especially Tx coils: and, 3. Structures are blow-molded or composite assemblies designed for high volume production. (electronics also designed for high vol production...). A word about Tx fabrication: We have experience and capability to fab self-supporting, dimensionally consistent Tx coils, but will have to develop tooling and procedures to achieve the consistency we will need. We will also have to do trade-offs with the electrical properties while we do this.... I have typical cross-sections and material choices in mind that seem like appropriate starting points. I also have tooling in mind, but Ugo may already have a plan. If we can balance electrical and mechanical properties and still have a mechanically stable coil assembly, the 'blow-molded' design has a range of advantages that coincide with the design targets. A word about 'blow-molded' design: Double-wall construction, hi-impact resistance, low weight, and low part cost, are hallmarks of the process. ( Along with ~zero conductivity ) If we use the process cleverly, we can also get very simple assemblies, low part count, easy parts changes, and terrific robustness at no extra production cost. The main expense will be in the integration and design, then development of production tooling. I have looked into this deep enough to reassure myself that there is a clear path to prototyping functional iterations before committing to expensive production tooling. The scope of our proposal should NOT include production tooling. NOTE: I did not include the battery pack Power Supply. Sorry.. I see it as a series of battery-packs worn on a belt on the Hips, or in a vest, a la TV cameramen; or in a backpack. THE WHEELS are ambiguous at this point. They present the possibility of eating up design effort. This needs a closer look. My take: An integrated detector assembly along these lines will be really robust, really cheap, and really simple.....when we get done. You could beat it with a baseball bat with not much effect. Even early, hand made prototypes could demonstrate this. The challenge is to integrate. Comments? Robin

Two Transmitter configurations are presented. Both are arranged in a 16” X 16” X 10” volume With Receiver arrays along the edges. Rectangular cross-section transmitter coils (4 X 5 turns) Flat ribbon cross-section transmitter coils (1 x 20 turns) Receiver arrays 12/4/2015Robin Lafever3

Flat ribbon cross section coil Corresponds to 1 X 20 turns,.10 dia. copper wire. This design concept assumes we can manufacture Dimensionally stable coil units using B-phase adhesives or potting techniques. 12/4/2015Robin Lafever4

Flat ribbon cross section coil Set Note offsets to allow the coils to nest 12/4/2015Robin Lafever5

Nesting….. 12/4/2015Robin Lafever6

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Flat ribbon cross section coil Set Final configuration with Receiver Array 12/4/2015Robin Lafever12

Receiver Array Note that Receivers pairs are Diagonally opposite. 12/4/2015Robin Lafever13

Rectangular cross section coil Corresponds to 4 X 5 turns,.10 dia. copper wire. This design concept assumes we can manufacture Dimensionally stable coil units using B-phase adhesives or potting techniques. 12/4/2015Robin Lafever14

Rectangular cross section coil Set Note offsets to allow the coils to nest 12/4/2015Robin Lafever15

Nesting….. 12/4/2015Robin Lafever16

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Nesting….. 12/4/2015Robin Lafever20

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Rectangular cross section coil Set Final configuration with Receiver Array 12/4/2015Robin Lafever22

12/4/2015Robin Lafever23 Detector Assembly, Exploded

12/4/2015Robin Lafever24 Mounting features for both the Transmitter and Receiver elements are molded into the housings. Housings are Blow-molded, hi-impact, plastic.

12/4/2015Robin Lafever25 Mounting features for both the Transmitter and Receiver elements are molded into the housings. Housings are Blow-molded, hi-impact, plastic. Cutaway shows internal support and alignment features, as well as, double wall construction.

12/4/2015Robin Lafever26 Mounting features for both the Transmitter and Receiver elements are molded into the housings. Housings are Blow-molded, hi-impact, plastic. Cutaway show internal support and alignment features, as well as, double wall construction. We can get superior shock absorption and light weight.

12/4/2015Robin Lafever27 Mounting features for both the Transmitter And Receiver elements. Housings are Blow-molded, hi-impact, plastic.

12/4/2015Robin Lafever28 Baseline configuration: 16” X 16” X 10” rectangular volume, nominal.

12/4/2015Robin Lafever29 Cart Housing Double-walled, blow-molded, hi-impact, plastic.

12/4/2015Robin Lafever30 Clever design may allow us to put the assembly features directly into the Cart Housing and eliminate the detector packaging..

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12/4/2015Robin Lafever32 Adjustable handles Thumb button pads Data screen Electronics Housing Integral wheels

12/4/2015Robin Lafever33 Adjustable handles Thumb button pads Data screen Electronics Housing Integral wheels

12/4/2015Robin Lafever34 Thumb button pads Data screen Electronics

12/4/2015Robin Lafever35 Adjustable handles Thumb button pads Data screen Electronics Housing Integral wheels Detector Assembly

12/4/2015Robin Lafever36 Adjustable handles Thumb button pads Data screen Electronics Housing Integral wheels Detector Assembly

12/4/2015Robin Lafever37 Adjustable handles Thumb button pads Data screen Electronics Housing Integral wheels Detector Assembly

12/4/2015Robin Lafever38 Adjustable handles Thumb button pads Data screen Electronics Housing Integral wheels Detector Assembly

12/4/2015Robin Lafever39 Thumb button pads Data screen Electronics Housing Detector Assembly

12/4/2015Robin Lafever40 Thumb button pads Data screen Electronics Detector Assembly

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