MATERIAL PROPERTY AND ENVIRONMENTAL CHARACTERIZATION BY PHOTODIODE SYSTEMS AND METHODS

    公开(公告)号:US20240328975A1

    公开(公告)日:2024-10-03

    申请号:US18193884

    申请日:2023-03-31

    发明人: Oliver Smith

    IPC分类号: G01N25/18

    CPC分类号: G01N25/18

    摘要: Photodiode systems, methods, devices, and circuitries are provided for determining a material property and/or determining environmental characteristics. In one embodiment, a measurement device includes a first member, a second member rotatably coupled to the first member at a pivot that affixes the first member to the second member. The first member and the second member are configured to pivot between a closed position, where the first member and the second member contact one another, and an open position where the first member is rotatably separated from the second member. An infrared emitter is disposed within the first member, the infrared emitter faces the second member. An infrared sensor is disposed within the second member facing the first member, where when the first member and the second member are in the closed position, the infrared emitter and the infrared sensor are misaligned.

    Sag detection using thermal conductivity

    公开(公告)号:US12085524B2

    公开(公告)日:2024-09-10

    申请号:US17968074

    申请日:2022-10-18

    IPC分类号: G01N25/18 E21B21/01 G01N11/00

    摘要: A sag detection apparatus comprises an oven containing a sample cell supported by a cell support structure, a thermal conductivity sensor including a sensor housing, and a roller with a first end supported by a first bearing and fixedly coupled to a first end of the cell support structure and a second end supported by a second bearing and fixedly coupled to a second end of the cell support structure. Temperature sensor wires electrically connect a temperature sensor and first fixed contact via stationary contacts configured to remain fixed during rotation of the roller and rotating contacts configured to rotate with rotation of the roller. Heat source wires electrically connect a heat source and a second fixed contact via stationary contacts configured to remain fixed during rotation of the roller and rotating contacts configured to rotate with rotation of the roller.

    Determination of Effective Ground Thermal Properties for Heat Exchange System

    公开(公告)号:US20240230563A1

    公开(公告)日:2024-07-11

    申请号:US18402556

    申请日:2024-01-02

    申请人: Ronald B. Foster

    发明人: Ronald B. Foster

    摘要: The present invention is a system and method for determining effective ground thermal properties. Accurate prediction of required loop length for geothermal heat exchange systems is critical for optimizing performance and associated cost, yet limited by lack of knowledge of the effective average thermal properties of the surrounding ground. Testing involves first charging the ground loop by circulating fluid at constant temperature and constant rate of heat input, then halting heat input and monitoring the ground loop temperatures during discharge. One aspect of the invention is to enable separate determination of effective ground thermal conductivity and volumetric heat capacity first by adopting design elements resulting in improved reproducibility, and second by evaluating thermal conductivity near the time when the quotient Q of later discharge temperature to start-of-discharge fluid temperature is almost independent of volumetric heat capacity. Evaluation discharge times are specific to both ground loop design and charging conditions.

    SENSOR AND SENSOR SYSTEM
    10.
    发明公开

    公开(公告)号:US20240201114A1

    公开(公告)日:2024-06-20

    申请号:US18353297

    申请日:2023-07-17

    IPC分类号: G01N25/18 G01N33/00

    摘要: According to one embodiment, a sensor includes a base including a first region and a second region; and a first sensor section. The first sensor section includes a first support portion fixed to the first region, a first structure, and a first film portion. The first structure is supported by the first support portion. The first structure includes a first resistance member. A first direction from the second region to the first structure crosses a second direction from the first region to the second region. The first film portion is fixed to the first region. A first gap is provided between the second region and the first film portion. A second gap is provided between the first film portion and the first structure.