| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 324656000 | Including a comparison or difference circuit | 17 |
| 20090033340 | SYSTEM AND METHOD FOR HIGH RESOLUTION SENSING OF CAPACITANCE OR OTHER REACTIVE IMPEDANCE CHANGE IN A LARGE DYNAMIC RANGE - Systems and methods are provided for sensing or measuring capacitive or inductive reactance or changes in reactance in which the sensed reactance is coupled with a known resistance in a sensor circuit and a start signal is provided to the sensor circuit, and a programmable delay line is used to generate a programmable delay signal. The outputs of the programmable delay and the sensor circuits are compared to ascertain which transitions first, and the programmable delay value is adjusted in successive approximation fashion to identify a programmable delay that best represents the delay time of the sensor circuit from which the sensed reactance value can be determined. | 02-05-2009 |
| 20090140752 | USE OF A NANOPARTICLE FILM HAVING METAL IONS INCORPORATED - The present invention relates to the use of a nanoparticle film having metal ions incorporated wherein and to a method of detecting a gaseous or volatile or liquid analyte in a medium. | 06-04-2009 |
| 20100188104 | INDUCTIVE INCREMENTAL DISPLACEMENT SENSOR, METHOD FOR DETERMINING THE DISPLACEMENT OF A FIRST OBJECT RELATIVE TO A SECOND OBJECT, AND INDUCTIVE SENSOR UNIT - The present invention relates to an inductive incremental displacement sensor for determining a displacement of a first object relative to a second object, comprising at least one graduated track mountable on the first object and having periodically alternating conductive regions and insulating regions, and having at least one scanning unit mountable on the second object for scanning the graduated track with a first sensor unit and a second sensor unit, which are laterally spaced from each other by a distance d=n*(p/2)+q, wherein n is an integer or zero, p is the pitch of the graduated track and 0 is <|q| | 07-29-2010 |
| 20100301876 | METHOD FOR DIAGNOSING AN ELECTRONIC DISIPLAY DEVICE - A method of diagnosing an electronic display device ( | 12-02-2010 |
| 20110006786 | CABLE INSTALLATION USING INDUCTION - A device for use with a conduit having a first conduit end and a conduit second end, into which conduit a cable can be installed using a flow of air into the first conduit end, the device being suitable for confirming that the air is flowing out from the second conduit end. In an embodiment, the device includes a housing, means to enable connection of the device to the second conduit end, a detector arranged to detect an electrical property change, and an actuator for causing an electrical property change detectable by the detector, wherein in use, the air flowing into the device causes the detector and the actuator to move relative to each other, causing an electrical property change detectable by the detector. | 01-13-2011 |
| 20110109325 | Inductive coagulation sensors and devices - This invention provides methods and devices for detecting the viscosity and conductivity of a conductive fluid sample. A sample fluid can be received into a sample chamber between a field inductor and sensor inductor. Electromagnetic fields generated by the field inductor can be modulated due to the counter-emf induced in the sample. The modulations can be detected by the sensor inductor and correlated to electric parameters in the fluid. | 05-12-2011 |
| 20110109326 | METHOD FOR THE OPERATIVE MONITORING OF TRACK BRAKES - Operative monitoring of track brakes involves passing an electric current through a winding of a brake magnet, measuring the electric current and comparing the temporal progression of the measured current with a saved temporal progression of a reference current. Comparison is achieved by calculating the difference between the measured current and the reference current. The difference between measured current and reference current may be temporally integrated and compared with a threshold value. To determine a magnetic coupling between track brake and track, a calculation may be made as to whether the measured current has local minima and/or local maxima during the activation of the track brake, only the temporal progression of the measured current as the current increases being subjected to a comparison with the reference current. The current may be activated in pulses, with the comparison of the measured current and the reference current being restarted with each pulse. | 05-12-2011 |
| 20110156723 | NON-CONTACTING METHOD AND APPARATUS FOR DETERMINING CONTACT VOLTAGE SOURCES AND PROVIDING A WARNING FOR SAME - This invention relates to non-contact measurement methods and an apparatus for the identification of hazardous contact voltages on energized objects and surfaces. The apparatus includes an electric field sensor structured to sense an electric field and a gain amplifier electrically connected to the electric field sensor to amplify electric signals from the electric field sensor. The apparatus further includes a signal conditioning circuit adapted to process the amplified electric signals and form time-coordinated signals and a digital signal processor adapted to evaluate the time-coordinated signals and provide a user with a status of a contact voltage source by activating an appropriate status indicator. | 06-30-2011 |
| 20110181303 | ELECTROMAGNETIC WAVE DETECTION SYSTEMS AND METHODS - Systems and methods for detecting electromagnetic waves are disclosed. A system for use in detecting an electromagnetic wave includes an inductive device and a spintronic device. The inductive device generates an induced electromagnetic field when the inductive device receives the electromagnetic wave. The spintronic device has an impedance that changes when exposed to the induced electromagnetic field from the inductive device. The change in impedance is indicative of the electromagnetic wave received by the inductive device. Another system for use in detecting or transmitting an electromagnetic wave includes a conductive device and an inductive device. The inductive device is configured to generate an induced electromagnetic wave when the inductive device receives an electromagnetic wave passed by the conductive device. Another system for detecting electromagnetic wave permittivity or permeability of an object includes a pair of antennas and an inductive device. | 07-28-2011 |
| 20110267077 | METHOD OF SENSOR CELL TIMING - A method for measuring values from a sensor cell having the basic structure of an MOS silicone transistor having and including a polymer material therein. The method includes the steps of expelling an analyte from the polymer material, determining a silicon current signature before analyte accumulation in a sensitive response region, introducing analyte into the polymer material, determining the silicon current signature immediately after analyte introduction, determining the organic current signature immediately after analyte introduction, allowing analyte accumulation in the polymer material, determining the silicon current signature after analyte accumulation, determining the organic current signature after analyte accumulation, and determining the silicon current signature after analyte accumulation in sensitive response region. | 11-03-2011 |
| 20120242352 | INDUCTIVE PROXIMITY SENSOR - Present techniques provide an inductive proximity sensor having a multi-receiver coil assembly and an evaluator circuit configured to receive a differential signal from the multi-receiver coil assembly to determine the presence of a target. The multi-receiver coil assembly includes two receiver coils in a differential coil arrangement and a transmitter coil configured to emit an electromagnetic field and induce a voltage on each of the receiver coils. The voltage difference between the two receiver coils is transmitted as a differential signal to the evaluator circuit. Targets which approach the inductive proximity sensor disrupt the electromagnetic field and change the induced voltages on each of the receiver coils, thereby changing the differential signal. The evaluator circuit processes the differential signal to determine whether the changes indicate that a target is present. | 09-27-2012 |
| 20130285678 | Filters, Filter Assemblies, Filter Systems and Methods for Identifying Installation of Qualified Filter Elements - A filter assembly has a qualified filter element that filters fuel, o filter housing for the qualified filter element and a water-in-fuel sensor that senses presence of water in the filter housing. An electrical resistance of the water-in-fuel sensor changes based upon whether the qualified filter element is installed in the housing. A filter assembly can also have a plurality of magnetic elements disposed on at least one of the filter housing and the qualified filter element. A plurality of wires are disposed on at least the other of the filter housing and the qualified filter element. The control circuit determines that the qualified filter element is installed in the filter housing based on a change in the electrical current in the plurality of wires. | 10-31-2013 |
| 20140167788 | INDUCTIVE SENSOR FOR ANGULAR MEASUREMENT OF THE POSITION OF A MOVING PART AND MEASURING METHOD USING SUCH A SENSOR - An inductive sensor includes a primary winding, two secondary windings and a moveable target, the primary winding being centered about a central axis and carrying a high-frequency alternating current which can induce a voltage in secondary windings, the secondary windings also being centered about the central axis and made up of a number k of substantially identical loops, which are successively crossed and arranged opposite the primary winding. In this case, the target is made up of a part having p=1 angular sector with an angular opening. The opening of the angular sector of the target is less than that of a loop of secondary winding with a deviation calculated such as to eliminate the fourth harmonic of the linearity deviation Fourier decomposition, between the measured angular value and real angular value for the position of the target over the measurement course. | 06-19-2014 |
| 20150109001 | HARDWARE-ONLY CONTACTLESS POSITION SENSOR SYSTEM - A hardware-only contactless position sensor system is provided that includes a contactless position sensor and hardware-only sensor system electronics. The sensor includes excitation, sine, and cosine coils. The electronics are coupled to the sensor and detect a position of a target relative to the sensor. The electronics include a phase shift and summation circuit that applies a phase shift at a frequency of the excitation coil to one of a sine signal from the sine coil or a cosine signal from the cosine coil as a phase shifted signal and add the phase shifted signal with an unshifted instance of the cosine or sine signal to produce a phase shifted output. The electronics also include a phase detector circuit that detects a phase of the phase shifted output and generate an output voltage corresponding to the phase and proportional to the position of the target. | 04-23-2015 |
| 20150109002 | Method and Apparatus for Recognizing a Manipulation on an Electrical Line - A method for recognizing a manipulation of at least one electrical line includes determining a parameter that is dependent on a resistance and a capacity, a resistance and an inductivity, or a resistance, a capacity, and an inductivity of the electrical line; comparing the determined parameter to a reference parameter to provide a comparison result; and recognizing a manipulation of the electrical line based on the provided comparison result. | 04-23-2015 |
| 20150362447 | PULSED WAVE GUIDE LIQUID QUALITY MEASUREMENT - A waveguide system may include an inner core, and a conductor wound around the inner core in conductive coils having a coil length, wherein a voltage pulse received by the pulsed waveguide propagates as an induced wave having a group velocity, the group velocity being below a threshold velocity, wherein a reflection signal or an end of line signal generated within the conductor from the induced wave is detectable from the initial voltage pulse. | 12-17-2015 |
| 324657000 | Using a bridge circuit | 1 |
| 20120126833 | NON-CONTACT STRESS MEASURING DEVICE - Apparatuses and methods for measuring stress or strain in a conductive material without physical contact with the material are provided. The device comprises an inductor circuit configured to induce an alternating current into the material along a first path; and a detector configured to detect a signal representative of the stress in the material along the first path when current is induced in the material. | 05-24-2012 |
