Sensor for detection of liquid spills on surfaces

Davis, Brent C.; Gayle, Tom M.

Title: Sensor for detection of liquid spills on surfaces

Full Record
Other Related Research

Abstract

A surface liquid detector is disclosed for detecting liquids spilled on surfaces such as floors. A temperature-sensitive thermistor probe is used in a bridge circuit to detect the change in resistance in the thermistor due to the change in thermal conductivity that occurs when a liquid contacts the probe. The device is characterized by the ability to detect either conductive or nonconductive liquids, such as water or oil spills.

Inventors:

Davis, Brent C. ^[1]; Gayle, Tom M. ^[1]

Oak Ridge, TN

Issue Date:: 1989-01-01

Research Org.:: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 875237

Patent Number(s):: H000652

Application Number:: 07/233092

Assignee:: United States of America as represented by United States (Washington, DC)

DOE Contract Number:: AC04-76DP00789

Resource Type:: Patent

Resource Relation:: Patent File Date: 1988 Aug 17

Country of Publication:: United States

Language:: English

Subject:: statutory invention registration; sensor; detection; liquid; spills; surfaces; surface; detector; disclosed; detecting; liquids; spilled; floors; temperature-sensitive; thermistor; probe; bridge; circuit; detect; change; resistance; due; thermal; conductivity; occurs; contacts; device; characterized; ability; conductive; nonconductive; water; oil; thermal conductivity; bridge circuit; conductive liquid; surface liquid; /340/73/200/

Citation Formats


                    Davis, Brent C., and Gayle, Tom M. Sensor for detection of liquid spills on surfaces.  United States: N. p., 1989. 
        Web.

Copy to clipboard


                    Davis, Brent C., & Gayle, Tom M. Sensor for detection of liquid spills on surfaces.  United States.

Copy to clipboard


                    Davis, Brent C., and Gayle, Tom M. Sun .  
        "Sensor for detection of liquid spills on surfaces".  United States.  https://www.osti.gov/servlets/purl/875237.

Copy to clipboard


                    
@article{osti_875237,

  title        = {Sensor for detection of liquid spills on surfaces},

  author       = {Davis, Brent C. and Gayle, Tom M.},

  abstractNote = {A surface liquid detector is disclosed for detecting liquids spilled on surfaces such as floors. A temperature-sensitive thermistor probe is used in a bridge circuit to detect the change in resistance in the thermistor due to the change in thermal conductivity that occurs when a liquid contacts the probe. The device is characterized by the ability to detect either conductive or nonconductive liquids, such as water or oil spills.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1989},

  month        = {1}

}

Copy to clipboard

Patent:

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Mountable eddy current sensor for in-situ remote detection of surface and sub-surface fatigue cracks

Patent Yepez, III, Esteban (Albuquerque, NM); Roach, Dennis P [Albuquerque, NM]; Rackow, Kirk A [Albuquerque, NM]; ...

A wireless, integrated, mountable, portable, battery-operated, non-contact eddy current sensor that provides similar accuracy to 1970's laboratory scale equipment (e.g., a Hewlett-Packard GP4194A Impedance Analyzer) at a fraction of the size and cost.
Full Text Available
Sensor for low force-noise detection in liquids

Patent Ziegler, Dominik; Ashby, Paul

The embodiments described herein provide a sensor. In an exemplary embodiment, the sensor includes (1) a resonator, (2) a probe attached to the resonator, and (3) an encasement that encases the resonator, where the encasement includes an opening through which the probe can protrude and where the dimensions of the encasement are on the same order as the dimensions of the resonator.
Full Text Available
Optical sensor comprising diffraction gratings with functionalized pores and method of detecting analytes using the sensor

Patent Weiss, Sharon M.; Ryckman, Judson D.; Kang, Christopher; ...

Diffraction gratings comprising a substrate with protrusions extending therefrom. In one embodiment, the protrusions are made of a porous material, for example porous silicon with a porosity of greater than about 10%. The diffraction grating may also be constructed from multiple layers of porous material, for example porous silicon with a porosity of greater than about 10%, with protrusion of attached thereto. In some embodiments the protrusions may be made from photoresist or another polymeric material. The gratings are the basis for sensitive sensors. In some embodiments, the sensors are functionalized with selective binding species, to produce sensors that specificallymore » « less
Full Text Available
Planar optical waveguide based sandwich assay sensors and processes for the detection of biological targets including early detection of cancers

Patent Martinez, Jennifer S [Santa Fe, NM]; Swanson, Basil I [Los Alamos, NM]; Shively, John E [Arcadia, CA]; ...

An assay element is described including recognition ligands adapted for binding to carcinoembryonic antigen (CEA) bound to a film on a single mode planar optical waveguide, the film from the group of a membrane, a polymerized bilayer membrane, and a self-assembled monolayer containing polyethylene glycol or polypropylene glycol groups therein and an assay process for detecting the presence of CEA is described including injecting a possible CEA-containing sample into a sensor cell including the assay element, maintaining the sample within the sensor cell for time sufficient for binding to occur between CEA present within the sample and the recognition ligands,more » « less
Full Text Available
Sensor and methods of detecting target materials and situations in closed systems

Patent Mee, David K.; Ripley, Edward B.; Nienstedt, Zachary C.; ...

Disclosed is a passive, in-situ pressure sensor. The sensor includes a sensing element having a ferromagnetic metal and a tension inducing mechanism coupled to the ferromagnetic metal. The tension inducing mechanism is operable to change a tensile stress upon the ferromagnetic metal based on a change in pressure in the sensing element. Changes in pressure are detected based on changes in the magnetic switching characteristics of the ferromagnetic metal when subjected to an alternating magnetic field caused by the change in the tensile stress. The sensing element is embeddable in a closed system for detecting pressure changes without the needmore » « less
Full Text Available

Similar Records