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Class 340/619 - Optical sensor


Subclass of Class 340 - Communications: electrical
Definition: Subject matter wherein the liquid level is detected by a
No. of patents: 164
Last issue date: 10/25/2011


1          
NumberTitleIssue Date
8044812Optical wireless sensor network
A wireless sensor network including a receiver including a photodetector, and a sensor node that includes a sensor configured to sense a property, a transmitter configured to emit outgoing optical energy, the outgoing optical energy being indicative of the property,...
10/25/2011
7902989Optical switch
An optical switch having a housing, a light source and a light detector. The light source and light detector are located remote from the housing. The light source is connected to the housing with a first light guide, and the light detector is connected to the housin...
03/08/2011
7714732Optical switch
An optical switch having a housing, a light source and a light detector. The light source and light detector are located remote from the housing, The light source is connected to the housing with a first light guide, and the light detector is connected to the housin...
05/11/2010
7417552Flood alarm
A flood alarm is disclosed. In an illustrative embodiment, the flood alarm includes a float assembly and a telephone system interface module connected to the float assembly. A method of indicating a flood in a structure is also disclosed. ...
08/26/2008
7403125Flow cytometry system with bubble detection
The flow cytometry system of the present invention includes a flow channel including an interrogation zone. A light source and a light detector are connected to the interrogation zone, such that a sample flowing through the interrogation zone can be optically analyz...
07/22/2008
7400266Method for improving vision in a motor vehicle
A method, a device and a processing unit for improving visibility in a motor vehicle are described, a light source of the motor vehicle illuminating an illumination range. At least one monitoring sensor of the motor vehicle monitors the surroundings around the motor...
07/15/2008
7348542System and method for detecting an intensity of light
A system and a method detect an intensity of light within an interior of a compartment and/or of an end cap to locate a position of a movable element within the interior of the compartment. A platform is attached to interior walls of the end cap for positioning a li...
03/25/2008
7327273Fluid monitoring device
This invention relates to a device to monitor the administration of a fluid through a conduit, such as intravenous fluid, and detect the completion of fluid delivery by monitoring the fluid level inside a chamber. The device will monitor, through an optical fluid se...
02/05/2008
7271893Device and method for checking the level of moving transparent containers
Device for checking the fill level of moving transparent containers comprising at least one light sensitive sensor unit, a light source directed to the sensor unit, and an evaluation unit for senso...
09/18/2007
7265662Apparatus and method for inspecting containers
This invention relates to an integrated apparatus and method for inspection of a container adapted to hold a pressurized gas. The integrated apparatus comprises (i) an imaging device configured to obtain image data corresponding to the container and to transmit the ...
09/04/2007
7260499Fuel delivery system with enhanced functionality and diagnostic capability
A control system for a fuel delivery system provides enhanced functionality and diagnostic capabilities relative to known systems. In accordance with one aspect of the invention, enhanced functionality and diagnostic capability is provided by integrating the pump co...
08/21/2007
7234830Optical switch
An optical switch having a housing, a light source and a light detector. The light source and light detector are located remote from the housing. The light source is connected to the housing with a first light guide, and the light detector is connected to the housin...
06/26/2007
7187142Motor drive with velocity noise filter
A drive unit for controlling a motor includes a position feedback device and a velocity noise filter. The position feedback device is operable to generate a position signal relating to a position of the motor. The velocity noise filter is coupled to the position fee...
03/06/2007
7161165Optical transducer for continuously determining liquid level
An optical transducer for determining liquid level within a container includes a sensing probe having a first elongate measurement face and a second elongate measurement face that converges toward the first measurement face. A light source is positioned for directin...
01/09/2007
7116236Oil tank sight glass monitor
An oil tank sight glass monitor comprising a housing having an opening therein sized to receive the sight glass of an oil tank; an emitter for emitting a beam of light, the emitter being mounted to the housing on one side of the opening so that the beam of light is ...
10/03/2006
7049622Optical position sensor for determining the interface between a clear and an opaque fluid
An inexpensive, optical position sensor for measuring a position or length, x, along a one-dimensional curvilinear, coordinate system. The sensor can be used, for example, to determine the position of an interface between a clear and an opaque fluid (such as crude o...
05/23/2006
7012272Method for measuring the filling level of a liquid in a cavity having a sub-mm wide opening
The invention relates to a method to optically measure the filling level of a liquid in a cavity having a sub-mm wide opening with the aid of a measuring sensor based on chromatic coding, the measuring sensor delivering a distance value and an intensity value as its...
03/14/2006
6968739Gauge and method for indicating a level of a liquid in a tank
A gauge is disclosed for indicating a level of a liquid in a tank including a display device and a control unit coupled thereto. The display device includes multiple light-emitting elements. The control unit receives a liquid level signal, measures a magnitude of th...
11/29/2005
6938478Impedance level meter for liquids in tanks
A method and a system for detecting the level of fluid in a container is provided: The level meter includes first, second and third generally parallel probes being positioned within the container. The first probe includes a first portion that is at least partially c...
09/06/2005
6900733Rain sensor, particular for a motor vehicle and method for mounting a rain sensor
A rain sensor and a method for installing a rain sensor are provided for a motor vehicle. The rain sensor includes a housing in which at least one printed circuit board is located and which has a light-conducting member, which at least partially closes the housing i...
05/31/2005
6894619Sensor for optically detecting foreign bodies particularly raindrops on a glass pane
A sensor for optical detection of foreign bodies, in particular raindrops, on a window, in particular on the windshield of a motor vehicle, having a sensor element that is coupled to the inside of the window and having a fastening device, which is glued to the windo...
05/17/2005
6796264Fluid flow monitor and indicator
A metal body has a threaded inlet port and a threaded outlet port which extend to corresponding inlet and outlet chambers within the body, and a semi-spherical liner seats within the body and has ports communicating with the inlet and outlet chambers. A dome-shaped ...
09/28/2004
6753785Oil tank sight glass monitor
An oil tank sight glass monitor comprising a housing having an opening therein sized to receive the sight glass of an oil tank; an emitter for emitting a beam of light, the emitter being mounted to the housing on one side of the opening so that the beam of light is ...
06/22/2004
6746053System for preventing parallel marketing of retail items
A system and method for detecting parallel marketing of an item, include forming at least one of a coating and a code on the item, interrogating the at least one of the coating and said code, and determining from the interrogating whether the item has been transferr...
06/08/2004
6703635Method and apparatus for measuring the level of liquid using optical fiber strain gauge
For measurement of a liquid level, an optical fiber connected at its one end portion to force receiving means movably arranged in liquid to receive force from the liquid is dipped in the liquid together with the force receiving means, and a change in the ...
03/09/2004
6696966Automatic salt level monitor for a water softening device
The present invention provides an automatic monitor for use in a tank with a water soluble softening agent. The monitor includes a signal emitter that produces a signal capable of being detected by an array of signal-detecting sensors. The sensors are dis...
02/24/2004
6668645Optical fuel level sensor
An optical fuel level sensor for providing an electronic signal representative of the fuel level within a fuel tank, generally comprising a waveguide body, a photo source, and a photo receiver. The waveguide body can either be of a dual-tapered or single-...
12/30/2003
6658933Fill-level indicator for a liquefied-petroleum-gas tank
Fill-level indicating device includes an array of optical detectors attached to a mount, vertically spaced apart relative to one another and distributed within the tank over the height of the latter, with each detector including a light source and a recei...
12/09/2003
6656871Method for production of catalyst
During the deposition of a catalytic component on a carrier, the position of the liquid level of a slurry containing the catalytic component is controlled with high accuracy and the adhesion of the slurry to the lateral face of the carrier is prevented. I...
12/02/2003
6612169Apparatus for engine lubricant level detection
The invention relates to an indicator system for fluid levels, including two or more optically and/or thermally conducting fibers, preferably suitable for indicating the fluid level of a lubricant in the case of piston internal combustion engines. In this...
09/02/2003
6599857Method for production of catalyst
During the deposition of a catalytic component on a carrier, the position of the liquid level of a slurry containing the catalytic component is controlled with high accuracy and the adhesion of the slurry to the lateral face of the carrier is prevented. I...
07/29/2003
6583725Motion sensor
A motion sensor having an outer tubular member closed at both ends thereof and an inner tubular member, concentrically disposed within the outer tubular member, forming therein an inner chamber and with the outer tubular member forming an outer chamber su...
06/24/2003
6555837Fluoropolymer fluid overfill probe
An optically-based overfill detection probe is provided that has a prism made of a fluoropolymer, preferably TEFLON.RTM. PFA. The prism material has a high resistance to chemical solvents, is less prone to condensation and frost than plastic or glass, and...
04/29/2003
6529751Optical detection and quantification of microair in blood
Both the number and the size of microair bubbles in a bloodstream are accurately determined optically, independently of oxygen saturation, by monitoring the intensity of light transmission in the 800-850 nm range through the bloodstream and indicating the...
03/04/2003
6484564Liquid leakage sensor, paper for detecting liquid leakage, and holder for detecting liquid leakage
A liquid leakage sensor, paper for detecting liquid leakage, and holder for detecting liquid leakage stably and reliably without being affected by bubbles when a large volume of liquid leaks at once. A liquid leakage sensor also has a tilt detection capab...
11/26/2002
6452202Apparatus for measuring level of liquid in tank
An apparatus for measuring the level of liquid contained in a tank includes a tank, at least one exhaust pipe having a transparent portion, a light source for emitting light to the transparent portion of the at least one exhaust pipe, a photodetector for ...
09/17/2002
6448573Fluoropolymer fluid overfill probe with infrared optical signal
An optically-based overfill detection probe is provided that has a prism with a substantially quadrilateral cross-sectional shape, such that internal reflection angles are less than ninety degrees. The prism is made of a fluoropolymer, preferably TEFLON.R...
09/10/2002
6389239Liquid detection device, fusing unit using the same, and electrophotographic apparatus
Disclosed is a liquid detection device wherein a condition in which there is no liquid remaining in either a storage member or a tank and a condition in which there is liquid remaining in at least either the storage member or the tank are easily discrimin...
05/14/2002
6331819Device and method for operating a rain detector
An apparatus and a method for operating an optoelectronic rain sensor for detecting the wetting of a window (14) with moisture for wetting-dependent triggering of a system, in particular a windshield wiper system for motor vehicles, is proposed in which t...
12/18/2001
6276901Combination sight glass and sump oil level sensor for a hermetic compressor
A combination sight glass and optical sensor is provided in the housing of a hermetic compressor to provide effective visual inspection in addition to automatic sensing of the level of oil in an oil sump. A sight glass fitting is provided in the housing a...
08/21/2001
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