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| Number | Title | Issue Date |
| 8174400 | Frequency monitoring to detect plasma process abnormality Abnormal conditions within an RF-powered plasma process chamber are detected by detecting whether the frequency of a variable-frequency RF power supply moves outside established lower and upper limits. In a first aspect, a first pair of lower and upper limits are es... | 05/08/2012 |
| 7902991 | Frequency monitoring to detect plasma process abnormality Abnormal conditions within an RF-powered plasma process chamber are detected by detecting whether the frequency of a variable-frequency RF power supply moves outside established lower and upper limits. In a first aspect, a first pair of lower and upper limits are es... | 03/08/2011 |
| 7796048 | Polyphase source detecting circuit A polyphase source detecting circuit configured for detecting a polyphase source having at least two phase sources includes at least two sampling circuit and an alarm circuit. Each sampling circuit has a control switch. A control terminal of the control switch of ea... | 09/14/2010 |
| 7429929 | Safety device A safety device includes a safety module (11), a data bus (12) and one or several transmitters (15, 16, 17, 18, 19, 20). The safety module transmits a pulse train (one dynamic signal) over the bus (12) constituting a loop, whereby the pul... | 09/30/2008 |
| 7401007 | Method, computer program and apparatus for extracting large size signal data samples with an automatically adjusted decimation ratio A method for rapidly extracting data file samples with an a signal monitor and an automatically adjusted decimation ratio is provided to solve the long-standing problems caused by large data files and small buffers by reducing a large data segment to a smaller, more... | 07/15/2008 |
| 7346464 | Gait waveform feature extracting method and individual identification system A gait waveform feature extracting method and an individual identification system extract features of the gait waveform. A one-step waveform corresponding to one step of a walking movement is specified using, as an index, a peak amplitude corresponding to a state wh... | 03/18/2008 |
| 7230526 | Device and method for synchronizing a flasher frequency with a central flashing frequency A device performs a synchronization between flasher frequencies of flasher devices and a central flashing frequency of a central control device at times when a data transmission device is in the active state. For a synchronization, a correction signal is determined ... | 06/12/2007 |
| 7227372 | Voltage monitoring apparatus in a semiconductor probe station An Electrical Die Sorting (EDS) process system for testing semiconductor chips comprises a probe station, a power supply unit configured in the probe station, and a voltage apparatus for measuring voltages of the power supply. The voltage apparatus comprises a measu... | 06/05/2007 |
| 7138910 | Tire/wheel assembly abnormality determining apparatus and method A tire/wheel assembly abnormality determining apparatus and a method thereof determines whether there is an abnormality in a tire/wheel assembly in a vehicle provided with the tire/wheel assembly constituted by fixing a tire, that is filled with compressed air, to a... | 11/21/2006 |
| 7132950 | Power management method and system The present invention provides a new application for an inductive coupler (12) used proximate a power transmission line (14). The magnetic field based power measurement method and system discussed herein in unique and differs from the prior technology ... | 11/07/2006 |
| 7103454 | Process for recognizing the movement of a motor vehicle A process and system are provided for recognizing the movement of a motor vehicle as well as a process for using an acceleration sensor in a device for blocking the starting of a motor vehicle. Reliable information is obtained on whether or not the motor vehicle was... | 09/05/2006 |
| 7072163 | Method and apparatus for a remote electric power line conductor faulted circuit current monitoring system An electric power line characteristic apparatus and monitoring method allows automatic conductor current data logging of maximum current magnitudes and data storage for later retrieval in a remote electric power line conductor faulted circuit current monitoring syst... | 07/04/2006 |
| 7013227 | System and method for determining harmonic contributions from non-linear loads A system and method for determining harmonics caused by non-linear loads are disclosed. Briefly described, one embodiment is a method comprising metering voltage on an electric power system; metering current on the electric power system; determining a predicted curr... | 03/14/2006 |
| 6975312 | Computer system having network connector and method of checking connection state of network cable therefor A computer system having a network connector to which a network cable is connected, including a displaying part displaying a connection state of the network cable; a signal processing part processing a signal inputted through the network connector; and a control par... | 12/13/2005 |
| 6949960 | Semiconductor integrated circuit comprising functional modes An integrated circuit device includes a pin for receiving a DC voltage component signal. The device includes a signal source for applying an AC signal to the pin, a buffer for converting the AC signal into a digital signal, and a digital detector for detecting a fre... | 09/27/2005 |
| 6914528 | Wireless communication systems, radio frequency identification devices, methods of enhancing a communications range of a radio frequency identification device, and wireless communication methods Wireless communication systems, radio frequency identification devices, methods of enhancing a communications range of a radio frequency identification device, and wireless communication methods are described. According to one aspect, a wireless communication system... | 07/05/2005 |
| 6850166 | Ancillary wireless detector Disclosed is a stimuli providing indicator (107) that is responsive to nearby transmitted radio signals. Fixed and mobile stations may produce such signals. In addition a cellular telephone operating at a high transmit power may be detected. Indicator (107... | 02/01/2005 |
| 6816078 | System and method for estimating power consumption of electric apparatus, and abnormality alarm system utilizing the same A method and a system for estimating electricity consumption of electric appliances and an abnormality alarm system, enabling estimation of individual electricity consumption of electric appliances in operation in a building or the like by a non-intrusive method, an... | 11/09/2004 |
| 6667692 | Electrical utility meter having harmonic data templates for power quality alarm thresholds An electrical utility meter having harmonic data templates advantageously enables a user to determine whether equipment at a particular site is susceptible to electrical damage or interference. According to an exemplary embodiment, the meter generates mea... | 12/23/2003 |
| 6336082 | Method for automatic screening of abnormalities A method of detecting abnormalities including a learning phase and an inspection phase. In the learning phase, a first statistical quantity and a second statistical quantity are determined based on a first set of n-dimensional data. A second set of n-dime... | 01/01/2002 |
| 6313752 | System for displaying dynamic on-line operating conditions of an interconnected power transmission network A system for displaying dynamic on-line operating conditions of an interconnected power transmission network including components to monitor the interconnected power transmission network by measuring and correlating voltage magnitude and phase existing at... | 11/06/2001 |
| 6246332 | System and method for detecting voltage and current imbalance in an electrical energy supply A system and method for detecting a current imbalance and a voltage imbalance in multiphase electrical energy provided to an energy meter. A phase single value is measured for each phase, a normalized phase value for each phase is determined, and a normal... | 06/12/2001 |
| 6229451 | Apparatus and method of monitoring a power transmission line The present invention includes an apparatus and method of monitoring a power transmission line. According to one embodiment, an apparatus adapted to monitor a power transmission line supported by a plurality of structures includes a first measuring device... | 05/08/2001 |
| 6147616 | Automatic power interruption and re-supply relay for an electric power line The present invention provides a digital automatic power interruption and re-supply relay for performing detection and comparing operation to inform a state of an accident with voice and numerals and automatically operating a connected relay to interrupt ... | 11/14/2000 |
| 6147420 | Wireless switching system A wireless switching system includes a central transmitter unit which generates a plurality of electromagnetic frequencies. A plurality of switches within the electromagnetic field each selectively open and close a resonant circuit having a unique resonan... | 11/14/2000 |
| 6112158 | Service type recognition in electrical utility meter Disclosed is a method and arrangement for use in an electrical utility meter, the electrical utility meter operable to be connected to a plurality of electrical service types. The arrangement is operable to identify a present service type, the present ser... | 08/29/2000 |
| 6107927 | Generator set controller with integral synchroscope mode A generator set controller verifies the status of a synchroscope mode selector to determine whether the generator set controller is operating in a synchroscope mode. When operating in a synchroscope mode, the generator set controller uses an existing disp... | 08/22/2000 |
| 6097298 | Apparatus and method of monitoring a power transmission line The present invention includes an apparatus and method of monitoring a power transmission line. According to one embodiment, an apparatus adapted to monitor a power transmission line supported by a plurality of structures includes a first measuring device... | 08/01/2000 |
| 6060879 | Current magnitude sensing circuit A current magnitude sensing circuit for detecting a malfunction of a DC brushless fan. The current magnitude sensing circuit detects drops in the current magnitude in windings of a fan motor. Depending on the frequency of the current drops in the fan curr... | 05/09/2000 |
| 6043749 | Frequency detection circuit A frequency detection circuit has a transistor switching device between first and second electric potentials, and a gate applied with a clock signal. A resistor and a capacitor are connected in parallel between the output of the transistor switching devic... | 03/28/2000 |
| 6034612 | Circuitry and process for testing non-intermittent signal generators In the case of a multichannel monitoring device for monitoring system operating states, a test input (45a, 45b) is provided per channel (2, 3) on an evaluation and monitoring circuit for the purpose of testing the supply leads (7a, 7b) to the signalling u... | 03/07/2000 |
| 5973604 | Method for monitoring optical fiber cables for lightning damage Lightning strikes on or proximate to an optical fiber cable may be detected via a lightning detector (18) that monitors the characteristics of voltage present on a metallic sheath (12) associated with the cable. The lightning detector (18) detects excessi... | 10/26/1999 |
| 5859530 | Process for determining the phase sequence in a three-phase network (rotary current network) In a first measurement step, the two test probes of a measurement apparatus are contacted with two of the three phase lines. The measurement apparatus determines the frequency of the three-phase voltage. In a subsequent second measurement step, one of the... | 01/12/1999 |
| 5831538 | Electrical fire hazard detector An electrical fire hazard detector which senses an arcing condition in AC power distribution systems by sensing radio frequency radiation generated by arcing. The detector senses certain frequencies and duty cycle(s) present in a frequency selected, demod... | 11/03/1998 |
| 5828309 | Power source miswiring detection apparatus A power source miswiring detection apparatus for detecting a miswiring of wires of a power source, including a pulse generator for generating a first pulse having a pulse width corresponding to a first phase difference between a first pair of two phases o... | 10/27/1998 |
| 5705989 | Current status circuit for a variable frequency motor A sensor linked with a power cable to produce a first signal in response to the presence of at least one of a sensed current and a sensed voltage within the power cable. The measuring circuit is electrically connected to the sensor to produce a second sig... | 01/06/1998 |
| 5634565 | Method for anticollision method and apparatus for cranes movable on a common path To prevent a collision between first and second mobiles, such as travelling cranes, on a common movement path, a method implemented in the first mobile entails measuring a first distance between the first mobile and an origin in a fixed system of axes and... | 06/03/1997 |
| 5610594 | Frequency monitoring device A frequency to be monitored is taken to a counter for the continuous measurement of its cycle time. The counter is so set that, when this frequency drops, i.e. when its cycle time increases, it reaches a certain condition and issues error signals (flags) ... | 03/11/1997 |
| 5592151 | Fire monitoring system A fire monitoring system for waste bunkers includes a pair of infrared cameras, which are arranged on an axis of rotation. The axis of rotation is connected to a controllable drive motor and to an angle transmitter. Furthermore, the fire monitoring system... | 01/07/1997 |
| 5563575 | Seismic alarm device for vehicles A seismic alarm device for vehicles which is capable of detecting an earthquake while the vehicle is moving and gives the alarm upon occurrence of the earthquake in order to provide the safety such as by stopping the motor vehicle, wherein a plurality of ... | 10/08/1996 |
