| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 324707000 | With frequency response, change or processing circuit | 8 |
| 20080303538 | Measuring Electrical Impedance at Various Frequencies - Known measuring instruments generate a test signal for application to a target device. Linear analogue to digital converters are then used to produce data samples representing the voltage across and the current through the device and these data samples are used to calculate impedance as a function of frequency. | 12-11-2008 |
| 20090230980 | METHOD FOR MEASURING D-Q IMPEDANCE OF POLYPHASE POWER GRID COMPONENTS - A method is provided for measuring D-Q impedance of a component of a polyphase power grid connected to a grid node, and evaluating the margin of stability at a node using Nyquist diagrams generated from the measured D-Q impedance data. A generator, coupled to the polyphase power grid, is controlled to induce suppressed-carrier stimulus current into the grid node. Circuitry measures response signals of suppressed-carrier form existing within a bus voltage at the grid node and a branch current of the component being measured. The method includes measuring complex voltage components of the response signals contained in the bus voltage and complex current components of the response signals contained in the branch current to form simultaneous equations that are resolved to determine the D-Q impedance parameters Zqq, Zqd, Zdq and Zdd of the measured component. | 09-17-2009 |
| 20120306515 | METHOD AND APPARATUS FOR GRID IMPEDANCE DETECTION - A method and apparatus for monitoring an AC line for impedance change. In one embodiment, the method, comprises superimposing a tone on an AC current coupled to the AC line, wherein the tone is a higher frequency than an AC voltage waveform on the AC line; applying a correlation over a sampled AC voltage waveform, obtained by sampling the AC voltage waveform, to generate a correlated signal; and determining whether at least one change in characteristic of the correlated signal occurs. | 12-06-2012 |
| 20140253153 | Radio-Frequency Ion Channel Antenna - An antenna is used for radio frequency measurements of cell wall impedance changes due to ion channels. The antenna provides enhanced direct readout of lipid bilayers and cells containing pores and ion channels. The antenna is placed around a nanopore, which may be fabricated from glass, quartz or other material, and is shaped to provide an enhanced sensitivity to electrical activity in the vicinity of the nanopore. As such, the antenna may be of a class of bi-cone- or other stub-antennas providing high gain and broad bandwidth, for example a planar variant of a “bow-tie” antenna. Accordingly, improved sensitivity of at least an order of magnitude may be achieved over past systems. | 09-11-2014 |
| 20150070036 | DRY RUNNING DETECTION SYSTEM - The dry running detection system for a pump includes an ultrasonic transducer ( | 03-12-2015 |
| 20150077145 | METHOD AND APPARATUS FOR GRID IMPEDANCE DETECTION - A method and apparatus for monitoring an AC line for impedance change. In one embodiment, the method, comprises superimposing a tone on an AC current coupled to the AC line, wherein the tone is a higher frequency than an AC voltage waveform on the AC line; applying a correlation over a sampled AC voltage waveform, obtained by sampling the AC voltage waveform, to generate a correlated signal; and determining whether at least one change in characteristic of the correlated signal occurs. | 03-19-2015 |
| 20160022024 | FASTENABLE DEVICE FOR ORAL CAVITY POSITION DETECTION - The present invention provides for a fastenable device for oral area position detection that is fastenable to oral care implements. | 01-28-2016 |
| 324708000 | Including a tuned or resonant circuit | 1 |
| 20160195485 | DETECTION DEVICE, POWER RECEPTION DEVICE, POWER TRANSMISSION DEVICE AND NON-CONTACT POWER SUPPLY SYSTEM | 07-07-2016 |
