Matches 1 - 50 out of 94 1 2 >
Match Document Document Title
7474230 RFID temperature logger incorporating a frequency ratio digitizing temperature sensor  
A semi-passive radio frequency identification (RFID) tag being coupled to a battery providing a battery voltage for powering a part of the circuitry of the RFID tag includes an RF communication...
7359809 Electricity metering with a current transformer  
The data storage and processing resources required for an electric meter are reduced by basing the selection and application of phase error correction on a root mean square load current flowing...
7171336 Method for operating a measuring instrument  
A method for operating a measuring instrument is capable of performing multiple diagnostic functions. For this, a process control is provided for the execution of the diagnostic functions in a...
7079962 Automated utility meter reading system with variable bandwidth receiver  
Methods and apparatus are disclosed for Automated Meter Reading (AMR) systems for determining quantities of a consumed utility product including electric, gas, and water service, using wireless...
7009491 Dual purpose vehicle key fob for training tire pressure sensors  
A dual purpose key fob has manipulable keys for, in a normal mode, locking and unlocking a vehicle and keys for opening a vehicle trunk and activating a panic alarm and, in a training mode, for...
6988043 External transformer correction in an electricity meter  
A method compensates for measurement errors of an external transformer coupled between an electricity meter and one or more power lines. The method includes a first step of obtaining at least one...
6781521 Filters for canceling multiple noise sources in borehole electromagnetic telemetry system  
An electromagnetic borehole telemetry system providing improved signal to noise ratio. Adaptive filters use noise channels as references to remove noise from the signal channel. Multiple noise...
6664900 Programmable transducer device  
A programmable transducer device that includes a signal source (e.g., a sensor) and a transducer output to output a transducer output signal and to receive a control signal from an external control...
6647351 Method of detecting the position of an inner surface of a workpiece on a machine tool, and machine tool implementing such a method  
The position of the inner surface of a hollow metal workpiece on a machine tool is detected by connecting an operating member of the machine, preferably a tool, to a first terminal of an electric...
6163276 System for remote data collection  
A remote data collection system for collecting usage data from an endpoint includes a monitoring module coupled to the endpoint, the monitoring module having a wireless transmitter to transmit the...
6121890 Electronic indicator with adjustable ratio of spindle displacement to displayed value  
An electronic indicator that includes a means for a scaling the actual displacement of the spindle by a user-adjustable scale factor representing the ratio of the actual displacement of a spindle...
6087934 Velocity-discriminating cable motion transducer system  
A system for monitoring motion includes a cable-encoder combination to create an electrical signal indicating distance and a microprocessor monitoring system to provide time measurement in...
5801645 Automatic paired LVDT probe balancing  
The apparatus and method of the present invention overcome the difficulties of balancing paired LVDT probes via provision of a quick and inexpensive process that can be implemented in either...
5777562 Centering device and method for centering  
A centering device and method includes a sensor for sensing the center of a bore preformed in a workpiece, and a remote output unit for outputting the positional signal generated by the sensor. The...
5767792 Method for calibrating a temperature sensing transponder  
A method of calibrating a characteristic sensor of a transponder having a memory characteristic of a host including the steps of placing a transponder in a liquid bath having a known temperature,...
5719564 Utility meter reading system  
A method for communicating utility usage-related information from a plurality of meter modules to a plurality of data accumulator units, each of which periodically transmits data to a control...
5673278 Method and apparatus for introducing diagnostic pulses into an analog signal generated by an instrument  
A method and apparatus for notifying a receiving device of fault conditions in a sensing element or an instrument. The instrument generates an analog signal that has an amplitude which is...
5621398 Programmable switch  
A programmable switch includes a housing. A sensor is associated with the housing. The sensor senses a measurable physical property of a sensed element proximate the housing and developing an...
5557267 Apparatus and methods for measurement system calibration  
Apparatus and methods for calibrating a transducer measurement system having a plurality of subsystems, permitting total system calibration by a few selected adjustments without requiring complete...
5546079 Output circuit arrangement integrated in an integrated electric circuit for supplying an output signal determined by user selectable parameters  
An output circuit in which both the signal type (i.e., current or voltage) as well as the signal level range (for example, 0 to 10 V, -10 V to +10 V) are based on user input parameters. The circuit...
5519388 Method and apparatus for active temperature compensation in a radiowave transmitter  
A method and apparatus for producing a temperature stabilized frequency from a signal generator in a monitoring station is described. The signal generator monitors the voltage response of an RC...
5515040 Methods of self-calibration for a key-type mouse  
This invention relates to methods of self-calibration for computer display cursor positioning devices imbedded within a computer keyboard key (sometimes referred to herein as a "key-type mouse") or...
5510779 Error compensating instrument system with digital communications  
An instrument system provides compensation for signal processing errors by processing both sensor signals and reference signals in a common signal processor. Reference signals may be provided which...
5499023 Method of and apparatus for automated sensor diagnosis through quantitative measurement of one of sensor-to-earth conductance or loop resistance  
A method of and apparatus for automated sensor validation diagnosis during and before operation of pluralities of sensors connected by multiplex sequence in a loop with analog-to-digital converter...
5479161 Automatic calibration of redundant sensors  
A system for calibrating the sensors of a redundant sensor system by calculating a first set of error signals based on differences between a combination of the outputs and known values and...
5475384 Remote addressable transducer provided with automatic calibration and digital compensation  
The RAD transducer comprises a sensor (1) for measuring physical quantities, a power supply section (7), a clock section (2), a timing section (4,5) and a circuitry for the acquisition of a...
5469442 Compact self-contained electrical-to-optical converter/transmitter  
A first optical receiver and a second optical receiver are provided for receiving a calibrate command and a power switching signal, respectively, from a remote processor. A third receiver is...
5355129 Measuring sensor device  
A measuring sensor device for the detection of physical quantities is equipped with an identification generator in whose memory module correction data (sensor identification data) are stored. For...
5323332 Instrument landing system calibrator  
The Instrument Landing System Calibrator employs a combined analog radio frequency downconverter with a digital control system for analysis of difference in depth of modulation of tones generated...
5253511 Transmitter with multifunction adjustment  
A process variable transmitter which has a manual adjustment for span and zero or the like. The adjustment has a finer adjustment range where the output changes responsive to changes in the...
5184120 Menu selection using adaptive force sensing resistor  
A method of menu selection is provided. An applied range of force by a user on a force sensitive resistor (112) selector key is calibrated (300) to a selective range of force for selecting a range...
5136286 Switched capacitance meter reading device using variable width electrodes  
A humidity and temperature resistant apparatus for determining the orientation of a rotatable meter hand relative to a dial spaced apart from a meter hand that creates and depletes a charge between...
5056051 Signal direction finding processor using fast Fourier transforms for receiver matching  
The present invention is an improved direction finding (DF) processing system using digitally implemented spectral analysis. Both phase and amplitude responses are calibrated by comparing each...
5051743 High precision, high frequency current sensing and analog signal decoding network  
An apparatus and method are provided for performing parametric measurements using sensor transducer devices to recover frequency variant, amplitude modulated information from encoded sensory...
4998068 Bias current control for providing accurate potentiometric measurements  
Apparatus and method are provided to ensure accuracy of a measurement signal obtained using a potentiometric sensor placed in a solution. The apparatus includes an interface amplifier that...
4982185 System for synchronous measurement in a digital computer network  
A synchronous distributed measurement system in a digital computer network comprising a master node and a plurality of slave nodes interconnected by communications links to form a ring. The master...
4897884 Apparatus for non-invasive calibration of a fluid sensor  
The present invention pertains to an apparatus for non-invasive calibration of a fluid sensor. The invention includes an electromagnetic signal transmitter and an electromagnetic signal receiver...
4849754 Remotely calibratable instrument system  
A two-wire, admittance-responsive instrument system in which a transmitter, receiver and calibrator are connected by a two-wire transmission line is disclosed. The calibrator repetitively transmits...
4783659 Analog transducer circuit with digital control  
A two wire transmitter controls loop current as a function of a sensed parameter such as pressure or temperature using analog sensing and signal processing circuitry. Corrections, such as for zero,...
4751654 Method of and arrangement for measuring impedances in measuring circuits having programmed memory  
A method of and arrangement for measuring impedances, particularly low capacitances, by alternately connecting one or more reference impedances and sensor impedances to a measuring circuit. A...
4733234 Remote calibrated power source system and method  
A remote calibrated power source system comprises an instrument for generating power, the instrument being positioned at a first location, and a remote calibrated power source module for outputting...
4714005 Power transmission  
A system and method for remotely measuring and linearizing flow characteristics, specifically velocity characteristics, of an electrohydraulic servo valve and actuator system. A plurality of raw...
4712106 Phase analog encoding system with compensation  
A phase analog encoding system with compensation for the phase shift error inherent in a resolver position transducer. The inherent phase shift error in a resolver position transducer is...
4670750 Photoelectric impulse transmitter  
Measured values are converted into electrical impulses for gauge devices and the like in a mechanism including a plurality of photocells arranged on a generally circular arc with a rotatable disc...
4642636 Method and apparatus for auto-calibration of signal conditioning electronics  
Numerous signal conditioning circuits on a plurality of printed circuit boards are calibrated remotely by a signal processing unit which sends coded signals to each board, either sequentially or in...
4628316 Temperature compensation circuit and method for position sensors  
A circuit and method to compensate for thermal effects on potentionmeter based sensors by presenting two input signals at different times to a comparator; the first utilizing one leg of the...
4591855 Apparatus for controlling a plurality of current sources  
A microprocessor controller converts one or more sensor signals to a time multiplexed digital signal which is converted to an analog voltage signal by a digital-to-analog converter. A switching...
4590472 Analog signal conditioner for thermal coupled signals  
The present invention described a signal conditioner. A thermocouple produces a signal that is present at a summing node input of a conditioning amplifier. The conditioning amplifier has a...
4549180 Process variable transmitter  
A process variable transmitter including a plurality of process variable detector units for detecting a primary process variable to be measured and secondary process variables not to be measured...
4464653 Combustible gas detection system  
A combustible gas detection system in which remotely located combustible gas sensors of the analog type are monitored by a central controller. The sensor analog data is converted to digital data...
Matches 1 - 50 out of 94 1 2 >