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    Apparatus and Method for Measuring the Level of a Liquid
    48.
    发明申请
    Apparatus and Method for Measuring the Level of a Liquid 审中-公开

    公开(公告)号：US20180266872A1

    公开(公告)日：2018-09-20

    申请号：US15463764

    申请日：2017-03-20

    申请人： Larry Baxter ,  David Frankman

    发明人： Larry Baxter ,  David Frankman

    IPC分类号： G01F23/24 ,  G01F23/00 ,  G01S11/14

    CPC分类号： G01F23/247 ,  G01F23/0076 ,  G01F23/248

    摘要： An apparatus and method for measuring the level of a liquid. The apparatus comprises an elongated, thermally conductive probe with an upper region to be disposed above the surface of the liquid, a lower region to be disposed below the surface of the liquid, and a middle region. A heater adds heat to the probe, and temperature sensors may measure the temperature of the probe in the upper and lower regions. An actuator may introduce a vibration into the probe at a first location, and a vibration sensor senses the arrival of the vibration at a second location. Electrical circuitry controls may be used to receive signals and make measurements. The liquid level may be computed by electrical circuitry controls via an equation.

    Robust dynamical method and device for detecting the level of a liquid using resistance temperature detectors
    49.
    发明授权
    Robust dynamical method and device for detecting the level of a liquid using resistance temperature detectors 有权

    公开(公告)号：US09810566B2

    公开(公告)日：2017-11-07

    申请号：US14836963

    申请日：2015-08-27

    申请人： Bruker BioSpin AG

    发明人： Dmitry Eshchenko ,  Robert Schauwecker

    IPC分类号： G01F23/24

    CPC分类号： G01F23/247 ,  G01F23/248

    摘要： A method for indicating the level of a liquefied gas in a cryogenic tank having a resistance temperature detector (1). The controller applies a heating pulse to the detector and performs a single resistance measurement after the heating pulse. The overheating of the sensor and the time interval for the measurement are found in a separate set of test experiment. As a result, for temperature sensors with negative temperature coefficient, the resistance of the sensor in gas is below some unique characteristic value, which can be used like a threshold criterion to distinguish between the liquid and the gas in a wide temperature range. For sensors with positive temperature coefficient, the resistance of the sensor in gas is larger than some unique characteristic value, which can be used like a threshold criterion to distinguish between the liquid and the gas in a wide temperature range.

    Storage tank level detection method and system
    50.
    发明授权
    Storage tank level detection method and system 有权

    公开(公告)号：US09772210B1

    公开(公告)日：2017-09-26

    申请号：US13493712

    申请日：2012-06-11

    申请人： Brian L. Houghton

    发明人： Brian L. Houghton

    IPC分类号： G01F23/22 ,  G01F23/24

    CPC分类号： G01F23/22 ,  G01F23/0007 ,  G01F23/0069 ,  G01F23/246 ,  G01F23/247

    摘要： A fluid (oil) storage tank is often in a remote place. A temperature sensor strip is affixed vertically down the outside of the tank. Each sensor sends its electronic signature and temperature to a local microprocessor. Various types of computations yield an accurate level indication on a local display, all powered by a car battery, solar panel or power supply. Data can be sent remotely as well. For explosive environments only a small processor is powered adjacent the tank. Then a second processor has the power to compute and analyze the raw temperature data and display it at a safe distance from the tank with only a twisted pair of low volt wires reaching the tank. Other non-explosive tanks such as a water tank can use a signal processor adjacent the strip for all data collection, computing and display functions.