QUALITY TESTING OF ADDITIVE MANUFACTURED PRODUCT USING ELECTRICAL MEASUREMENTS

    公开(公告)号:US20200018724A1

    公开(公告)日:2020-01-16

    申请号:US16034870

    申请日:2018-07-13

    Abstract: A method of determining an amount of imperfection in an additively manufactured material is disclosed herein. The method includes forming a sample piece constructed from the material during a same additive manufacturing cycle as a design piece constructed from the material, introducing a first electrical current to the sample piece while maintaining the sample piece at a reference temperature, and determining the amount of imperfection in the material depending on the measured resistance and the reference temperature of the sample piece.

    CONTACTING TYPE FLOW THROUGH CONDUCTIVITY CELL

    公开(公告)号:US20180340905A1

    公开(公告)日:2018-11-29

    申请号:US15604231

    申请日:2017-05-24

    CPC classification number: G01N27/08 G01N27/07

    Abstract: A conductivity cell includes a cylindrical flow tube holder having a closed first end and an open second end, a first end fitting positioned on the first end of the flow tube holder, a second end fitting positioned on the second end of the flow tube holder, a flow tube positioned within the flow tube holder, an end cap positioned in the open second end of the flow tube holder and adjacent the flow tube and the second end fitting, a plurality of electrodes positioned in the flow tube, a plurality of o-rings positioned on the electrodes, and a flow through hole extending from the first end fitting through the flow tube holder, the flow tube, and the end cap to the second end fitting. The plurality of electrodes are press-fit into the flow tube.

    Four-wire conductivity cell circuit

    公开(公告)号:US10598623B2

    公开(公告)日:2020-03-24

    申请号:US15604243

    申请日:2017-05-24

    Abstract: A conductivity cell system includes a flow tube having a flow through hole extending from a first end of the flow tube to a second end of the flow tube, a plurality of electrodes positioned in the flow tube, and circuitry connected to the plurality of electrodes. The plurality of electrodes form pairs of electrodes, each pair consisting of two electrodes positioned across the flow tube from each other and being connected together.

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