TDR fluid level sensor
First Claim
Patent Images
1. A system for accurately measuring fluid level in a vessel, comprising:
- an elongated portion being a coaxial tube having a hollow center and a first conductive outer shell;
a shaped coaxial arm comprising a second conductive outer shell; and
a sensor comprising a transmitter capable of creating and transmitting an excitation electromagnetic pulse for traversing the elongated portion and the arm, and a receiver for receiving a reflected pulse,wherein a proximate end of the elongated portion physically joins a distal end of the arm in a manner to create a continuous waveguide comprising the arm and the elongated portion for an electromagnetic pulse provided by the sensor, the sensor further comprises power supply circuitry, digital logic, and analog circuitry,wherein the digital logic further comprises a processor, wherein the processor further comprises;
logic configured to initiate the transmitter for sending the excitation electromagnetic pulse,logic configured to synchronize the receiver to the transmit pulse, andlogic configured to determine temperature of the fluid by measuring actual dielectric constant of the fluid and comparing the measured actual dielectric constant of the fluid to a list of fluids having known dielectric constant values.
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Abstract
A system and method for accurately measuring fluid level in a vessel is provided. Generally, the system contains an elongated portion being a coaxial tube having a hollow center, an arm being coaxial in shape, and a sensor containing a transmitter capable of creating and transmitting an excitation electromagnetic pulse for traversing the elongated portion and the arm, and a receiver for receiving reflected pulses, wherein a proximate end of the elongated portion joins a distal end of the arm in a manner to create a waveguide for an electromagnetic pulse provided by the sensor.
75 Citations
28 Claims
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1. A system for accurately measuring fluid level in a vessel, comprising:
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an elongated portion being a coaxial tube having a hollow center and a first conductive outer shell; a shaped coaxial arm comprising a second conductive outer shell; and a sensor comprising a transmitter capable of creating and transmitting an excitation electromagnetic pulse for traversing the elongated portion and the arm, and a receiver for receiving a reflected pulse, wherein a proximate end of the elongated portion physically joins a distal end of the arm in a manner to create a continuous waveguide comprising the arm and the elongated portion for an electromagnetic pulse provided by the sensor, the sensor further comprises power supply circuitry, digital logic, and analog circuitry, wherein the digital logic further comprises a processor, wherein the processor further comprises; logic configured to initiate the transmitter for sending the excitation electromagnetic pulse, logic configured to synchronize the receiver to the transmit pulse, and logic configured to determine temperature of the fluid by measuring actual dielectric constant of the fluid and comparing the measured actual dielectric constant of the fluid to a list of fluids having known dielectric constant values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for accurately measuring fluid level in a vessel, comprising:
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an elongated portion being a coaxial tube having a hollow center and a first conductive outer shell; a fixed shaped coaxial arm comprising a second conductive outer shell; and a sensor comprising a transmitter capable of creating and transmitting an excitation electromagnetic pulse for traversing the elongated portion and the arm, and a receiver for receiving a reflected pulse, wherein a proximate end of the elongated portion physically joins a distal end of the arm in a manner to create a continuous waveguide comprising the arm and the elongated portion for an electromagnetic pulse provided by the sensor, and wherein the arm is in the shape of an S. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification