Abstract: An apparatus coupled to a low speed tester and a device is disclosed. The device may have a first speed faster than a second speed of the low speed tester. The apparatus may be configured to allow the low speed tester to perform high speed tests of the device at the first speed.

Abstract: Trial decimations are performed on an acquired waveform. Each trial produces a sequence of packets applied to a complexity detection circuit. Each packet contains a decimation value to be used in place of acquisition values to be suppressed along a decimation sample width. Each packet also includes the maximum and minimum values that occurred within the associated decimation sample. A plurality of counters record for a trial decimation the number of instances when the differences in waveform extremes exceed a corresponding plurality of selected thresholds. Complexity introduced by decimation will tend to produce waveforms having larger voltage excursions over the region of suppressed acquisition samples. The data in the counters is processed to produce a suite of histograms examined to select a decimation factor that does not introduce significant additional complexity.

Abstract: A method and system for performing sequence time domain reflectometry to determine the location of line anomalies in a communication channel is disclosed. In one embodiment, the system generates a sequence signal and transmits the sequence signal over a channel that is the subject of the sequence time domain reflectometry analysis. The system monitors for and receives one or more reflections, collectively a reflection signal, and presents the reflection signal to a reflection processing module. In one embodiment, the reflection signal is correlated with the original sequence signal to generate a correlated signal. The system may perform signal analysis on the correlated signal to determine a time value between the start of the reflection signal and the subsequent points of correlation. Based on the time value and the rate of propagation of the signals through the channel, the reflection processing module determines a distance to a line anomaly.

Abstract: Methods, systems and programs in an information processing system comprising one or a plurality of devices managed by a manager device, for decreasing the cost of monitoring measurements, while using conventional techniques for managing problems. The cost saving is achieved when the managed devices conform to the expected quality of service. This saving does not negatively affect the response time required to detect either solid failures or performance problems.

Abstract: For determining a jitter value for a digital data signal, a jitter histogram determined for the digital data signal is substantially approximated using n normal distribution functions. The two outermost normal distribution functions are determine, and the jitter value is derived from a distance between the mean values of the two outmost distribution functions.

Abstract: A method of classifying samples to one of a number of predetermined classes involves using a number of class models or classifiers to form order statistic for each classifier. A linear combination of the order statistic (L-statistic) is calculated to determine the confidence of that particular classifier, both in general and for that particular sample. Relative weights are then derived from these confidences, and used to calculate a weighted summation across all classifiers for each class of the likelihoods that a sample belongs to that class. The sample is classified in the class which has the associated weighted summation which is greatest in value.

Abstract: Methods, systems and programs in an information processing system comprising one or a plurality of devices managed by a manager device, for decreasing the cost of monitoring measurements, while using conventional techniques for managing problems. The cost saving is achieved when the managed devices conform to the expected quality of service. This saving does not negatively affect the response time required to detect either solid failures or performance problems.

Abstract: A flow diagnostic system for a flow sensing element and impulse lines. A pressure transmitter coupled to the impulse lines provides digital pressure data to a control system. The control system provides the pressure data and real time clock readings to a diagnostic application. The diagnostic application calculates a difference between current pressure data and its moving average. A condition of the primary element or impulse lines is diagnosed from a current pressure data set relative to an historical data set. The diagnostic application is downloadable from an application service provider (ASP). The application can run on the control system, a remote computer or the ASP. A diagnostic report is preferably provided.

Abstract: An apparatus and method for monitoring the force severity of a mechanical press able to do so without utilizing a contact force sensor. The method continually computes values of dynamic deflection for the press being monitored and utilizes these values to compute load on the press at any point in time. Also provided is a method and apparatus for generating a theoretical slide displacement curve and an actual displacement curve as well as a system for comparing such curves.

Abstract: In a method and a device for carrying frequency synthesis, in particular in a distance measuring device based on the principle of evaluating the change over time in the phase of an electromagnetic radiation emitted by a radiation source and remitted by an object aimed at, a frequency, which is preferably furnished by a quartz oscillator, is regulated in a ring oscillator with N delay elements (V1, V2, V3, . . . , VN) to a desired first high frequency (F), which is used as a mixer frequency or as a modulation frequency. The signals at the N delay elements (V1, V2, V3, . . . , VN) are delivered to a multiplexer, which is switched over with a cadence that is equivalent to 2*N times the frequency of the low-frequency measurement signal to be evaluated to produce a modulation frequency or mixer frequency.

Abstract: A vehicle occupant classification system categorizes vehicle occupants into various classes such as adult, child, infant, etc. to provide variable control for a vehicle restraint system such as an airbag. The classification system utilizes sensors that are installed in various locations in the vehicle. The sensors are used to generate a three-dimensional profile for the vehicle occupant. Various factors can affect the accuracy of this three-dimensional profile. Fuzzy logic is used to reduce some of the inaccuracies by providing multiple decision levels for various stages of the classification. Inaccuracies are also caused by sensors shifting within the system from their original position. This condition creates offset and the system evaluates this offset and generates a correction factor to provide a more accurate three-dimensional profile.

Abstract: A zone arc fault detection system for detecting arcing faults in a defined zone of an electrical circuit, such as an aircraft circuit, includes a pair of substantially identical parallel insulated conductors for each zone in which arcing is to be detected. A detection zone is defined by the parallel conductors between end points where the two conductors are coupled together. A current sensor is operatively associated with each pair of parallel conductors. The current sensor and conductors are respectively configured and arranged such that the current sensor produces a signal representative of a difference in current between the two conductors.

Abstract: A method for estimating the input power to a cable modem includes generating a look-up table containing AGC integrator accumulator values corresponding to selected frequencies and amplitudes. The look-up table is generated by first constructing a calibration matrix by inputting a plurality of calibration signals having known input frequencies and known input power levels into the cable modem's receiver, and recording AGC integrator accumulator values corresponding to several frequencies and power levels over a selected operating range as calibration points. Next, an interpolation and extrapolation process generates the look-up values corresponding to the frequencies and amplitudes in between the calibration points. During modem operation, the modem estimates the input power by checking the AGC integrator accumulator value corresponding to the input frequency and amplitude.

Abstract: A method is provided for managing inspection requirements using a network-based system. The system includes a server system coupled to a centralized database and at least one client system. The method includes receiving information relating to a plurality of components of a specific plant and storing the information into a centralized database. The method further includes cross-referencing the information received, updating the centralized database based on the information received and providing information in response to an inquiry.

Abstract: Angle data ranging from 0° to 360° obtained by performing polar conversion with respect to a periodic signal are input to a low pass filter having: a phase accumulator for outputting smoothed angle data; a phase comparator for obtaining a phase error between the angle data and the smoothed angle data; a first amplifier for amplifying the phase error; a second amplifier for further amplifying the phase error; an integrator for integrating the phase error PE amplified by the second amplifier to obtain a velocity error; and an adder for adding the phase error amplified by the first amplifier and the velocity error to determine a control voltage. The phase accumulator controls the frequency of the smoothed angle data so that the phase error is zero based on the control voltage to remove a high frequency component in the angle data.

Abstract: A clock signal xc(t) that has been converted into a digital signal is transformed into a complex analytic signal zc(t), and an instantaneous phase &THgr; of the zc(t) is estimated. A linear phase is removed from the &THgr; to obtain a phase noise waveform &Dgr;&phgr;(t). The &Dgr;&phgr;(t) is sampled at a timing close to a zero crossing timing of the xc(t) to extract the &Dgr;&phgr;(t) sample. A root-mean-square value &sgr;t of the &Dgr;&phgr;(t) samples is obtained, and a differential waveform of the extracted &Dgr;&phgr;(t) samples is also obtained to obtain a period jitter Jp. Then a root-mean-square value &sgr;p of the Jp is obtained to calculate a correlation coefficient &rgr;tt=1−(&sgr;p2/(2&sgr;t2)). If necessary, an SNRt=&rgr;tt2/(1−&rgr;tt2) is obtained. The &rgr;tt and/or the SNRt is defined as a quality measure of a clock signal.

Abstract: A power meter is provided having an auto-calibration feature and a data acquisition node for measuring the power usage and power quality of electrical power in an electrical power distribution network. The auto-calibration feature calibrates the power meter at predetermined time increments and as a function of temperature changes.

Abstract: A system for monitoring conditions relating to the status of items such as perishable food products stored in enclosed spaces has a number of sensors mounted in the spaces. Tables maintained by the system hold a description of the spaces to be monitored and the location and identity of the sensors within each space. The values detected by each sensor are periodically recorded and tested against benchmark values established for the stored items adjacent to the sensor. Values outside of the benchmark values create an alarm condition, and a set of alarm messages are displayed on a display unit. The alarm messages include suggested corrective actions. The user has the opportunity to signal to the system the corrective actions taken, and the system stores a record of these corrective actions in association with the corrective actions and the alarm condition.

Abstract: A building response function defining a response of a building to specific environmental change, e.g., occurrence of a fire, in terms of the building structure, is stored in a computer. Also stored is a refuge motion function defining the refuge motion of individuals in terms of attributes of the individuals and the building response. The building response is computed by substituting design values of the building structure into the response function. Attributes of persons are inputted to the computer, and individuals' refuge motion is computed by using both inputted attributes and the computed building response. With the inputted and computed values, three-dimensional (3D) simulation images of the building structure, of the building response, and of individuals' refuge motion are computed. Then, a superposed 3D simulation image of the three images is displayed to facilitate analysis of the building performance.

Abstract: An activating algorithm is generated for rollover detection for safety-related devices in automotive vehicles. First, a theoretical characteristic rollover curve, adapted to the respective vehicle, is assumed. This theoretical rollover curve is approximated with the aid of low pass filter functions to specific cutoff frequencies and trigger thresholds respectively. These cutoff frequencies and trigger thresholds are adapted to the rollover scenarios to be detected. The sensor signals generated by an angular rate sensor for sensing the rotational velocity of the rolling motion, are processed and evaluated by these low pass filter functions for activating a safety device, if necessary. The low pass filter functions provide a rollover curve which is an approximation of the theoretical rollover curve.