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8041720 |
Ordering telemetry messages
A method for ordering telemetry messages containing attributes individually not sufficient to establish total ordering is provided. An initial rank value is assigned for a first telemetry message....
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7901546 |
Monitoring methods, systems and apparatus for validating the operation of a current interrupter used in cathodic protection
The present invention includes systems, methods and apparatus for continuously, independently and in some cases remotely monitoring the operation of a current interrupter used to test a cathodic...
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7522639 |
Synchronization among distributed wireless devices beyond communications range
The present invention discloses a method and system for time synchronization among distributed communication devices, particularly wireless and even beyond communications range, either fixed or...
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7511651 |
Interface for multiple receivers and a resistor ladder
An apparatus is provided for a switching interface for a first receiver, a second receiver, and a resistor ladder. A first terminal is coupled to a first resistor of the resistor ladder. A second...
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7301477 |
Power saving wireless telemetering system
Disclosed is a telemetering system that comprises a wireless base station and a number of wireless sensor nodes. Each wireless sensor node includes a solar cell, a sensor for producing observation...
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7250857 |
Multiplexer method and system for intrinsically safe applications and a multiplexer switch for use therein
A multiplexing system is provided for a plurality of sensors disposed in a tank containing a potentially explosive environment and excited from a common excitation circuit outside of the tank...
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7245976 |
Field apparatus
A field apparatus for controlling a controlled element includes a diagnosis unit for diagnosing abnormality of the field apparatus and/or the controlled element and a bidirectional digital...
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6995683 |
System and method for transmitting downhole data to the surface
A system and method are disclosed that provide for transmitting data from a downhole location to the surface. In one embodiment, a communications medium provides data transfer capabilities to the...
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6994562 |
Apparatus for multiplex communication
In an apparatus for multiplex communication, a bus line constitutes a bus type network for connecting a plurality of terminal communication equipments. A plug-shaped terminating resistance device...
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6762693 |
Multiple input multiplexing connection apparatus and method
A connection system for communicating multiple signals between a steering wheel and a steering column of a vehicle over a single wire is provided that uses time division to multiplex multiple...
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6744357 |
Signal receiver for tire air pressure monitoring system
A signal receiver for tire air pressure monitoring system determines whether the pressure detection signals from all transmitters have been received during an engine stop state. Upon affirmative...
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6510449 |
Data transmission system
In the data transmission system according to the present invention, a master apparatus transmits data to a plurality of slave apparatuses during a time block T1-1 and the individual slave...
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6494616 |
Multiplexed sensor array
A sensor array includes a plurality of sensors connected to two or more groups of wires such that individual sensors can be addressed. No two sensors are connected to the same two wires. The groups...
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6337636 |
System and techniques for seismic data acquisition
A data acquisition system has a central station connected to a plurality of nodes over a network. Each node is connected to receive signals from one or more sensors ad each is configured to have...
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6337570 |
Current loop comprising a test circuit
The 4 mA-20 mA type or 0-20 mA type current loop connects an analog sensor (1) to an acquisition system (3), respectively carrying a sensor current (Ic) and an acquisition current (Ia). A test...
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6262415 |
Orientation sensor system with high precision optical interrogation and dense multiplexing
An apparatus and method for measuring the orientation of a platform by receiving and reading signals from one or more orientation sensors, such as a magnetic compass, using optical interrogation,...
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6184798 |
Unidirectional telemetry system
A telemetry system comprises a plurality of beacons. Each beacon repetitively transmits a packet having a first predetermined time duration. The beacon transmits the packet a first predetermined...
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6122278 |
Circuit and method for protocol header decoding and packet routing
A digital delay line, comprising adjustable digital delay elements coupled in series, receives and buffers a packet bit stream. The outputs of selected adjustable digital delay elements are tapped...
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6020830 |
Telemetry system using broadband correlation techniques
An efficient and cost effective analog telemetry system for transmitting receiving many individual data channels over long distances is provided by having each data channel signal modulate a...
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5764155 |
Dynamic data exchange server
A dynamic data exchange (DDE) server which allows external programs to access power management data is presented. The DDE server provides a mnemonic cross reference between register items and...
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5761208 |
Expansible high speed digital multiplexer
A multiplexer, preferably on an integrated circuit chip, receives a plurality of buses each having a plurality of lines responsive to binary indications and passes the binary indications in the...
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5631874 |
Telemetry transmission protocol for towed hydrophone streamer
Disclosed is a protocol for transmitting data in a towed hydrophone streamer, including a transmission method and a data frame. The method comprises the steps of (1) receiving a portion of the data...
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5610598 |
Missile telemetry data interface circuit
An interface circuit for receiving an analog PAM telemetry data stream from missile's telemetry unit. The PAM data stream comprises a waveform divided into 64 channels and includes a sync signal....
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5594871 |
Data communication method and data communication system using data communication apparatus therein
The data communication system according to the present invention executes data transmissions and data receptions between a main unit and a plurality of terminals by the polling/selecting method....
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5539396 |
Remote monitoring system for instrumentation
A remote monitoring system for instrumentation that is capable of measuring certain characteristics of a process such as a pH value includes an instrument for providing a measurement output signal...
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5528507 |
System for utility demand monitoring and control using a distribution network
A system for electric power demand monitoring and control includes one or more data distribution networks interconnecting intelligent utility units located at customer homes with a host computer...
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5512890 |
Sensor connection system
A sensor connection apparatus for connecting a plurality of sensors to a process controller having a bus for transferring information, wherein each sensor produces an output corresponding to a...
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5495240 |
Master-slave data transmission system employing a flexible single-wire bus
A master-slave data transmission system employs a flexible single-wire bus and where any master unit can send data to or read data from any slave at a single time. Data transfer is accomplished by...
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5488866 |
Time-interleaved method for efficient operation of an acoustic wave sensor array
A time-interleaved method for efficient operation of an acoustic wave sensor array couples each sensor repetitively and one at a time via a digitally-addressable analog switch, or multiplexer, to a...
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5446655 |
Multiple-meter driving apparatus
A multiple-meter driving system intends to cut down on the amount of space needed and to reduce the manufacturing cost by providing a single controller including a processing circuit, the...
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5428555 |
Facility and gas management system
An interactive computer controlled management system for real-time data gathering and analysis of process information relating to a plurality of data sources in a facility and for controlling...
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5420578 |
Integrated transmitter and controller
Integrated transmitters and controllers for use in monitoring process variables. A transmitter and controller for monitoring and controlling a process variable in a process control loop comprises a...
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5355085 |
Multichannel SQUID flux meter having multiplexed SQUID flux sensors
A plurality of SQUID flux sensors are supplied with their respective bias currents at the same time from a bias source. A superconducting multiplexer multiplexes output signals of the SQUID flux...
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5343470 |
Multiplex transmission system
In a multiplex transmission system wherein data is transmitted among a plurality of control units connected to a multiplex transmission line in decentralized fashion, communication is performed...
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5272476 |
Data acquisition system having novel, low power circuit for time-division-multiplexing sensor array signals
An electronic circuit architecture time-division-multiplexes analog sensor ignals from a distributed sensor array onto a common transmission line in a digitally encoded format. The architecture...
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5270705 |
Telemetry data word selector and processor
A telemetry word selector and processor device having several digital-to-analog converters (DAC's) receives successive data words each accompanied by a tag word identifying a parameter set in the...
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5235274 |
Pulsed excitation position sensor system using linear variable differential transducers with multiplexing
A device for measuring the position of an element utilizing a linear variable differential transducer. The primary of the transducer is excited by using a single pulse, causing an induced pulse to...
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5218298 |
Two-terminal-hall-sensors monitoring system for providing decoded magnetic field amplitude signals and system diagnostic signals
A magnetic-field monitor includes a Hall sensor of the kind having a voltage reference terminal and a signal output terminal for being energized by applying a DC voltage across the output terminal...
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5200676 |
Multiplexed vehicle window wiper control
A window wiper system for an automotive vehicle provides multiplex encoding of a control switch signal and an additional wiper control signal in a two-channel multiplex control signal and decoding...
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5198810 |
One-way data telemetering system utilizing the power supply mains
A data telemetering system includes a plurality of remote transmitter units connected via an alternating current power supply mains to a central receiver. Each cycle of the line voltage is divided...
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5077698 |
Method and device for the high-rate transmission of data following a quasi-asynchronous mode
Method and device for the high-rate transmission of data between a multiplicity of acquisition apparatuses (Ai) and a central station to which they are connected by a common transmission channel...
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5045851 |
Analog signal multiplexer with noise rejection
In analog multiplexers using solid state multiplexing relays and having a shunt capacitor circuit across each input channel as part of a filter for normal mode noise, common mode noise is rejected...
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5017916 |
Shift prompter/driver information display
A shift prompter/driver information display for a highway truck is disclosed. The display is operable to cruising, prompting, and shifting modes of operation. In the cruising mode of operation the...
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4890095 |
Circuit arrangement for automatically monitoring several analog electric signals
A circuit arrangement is described for automatically monitoring several analog electric signals and for maintaining predetermined ranges of tolerances by successive comparison with reference...
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4885568 |
Integrated alarm transponder
A time multiplexed integrated alarm contact for reporting detected alarm conditions to a system controller in a hardwired alarm system and wherein distinguishable binary frequencies are used for...
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4881071 |
Transducer for measuring one or more physical quantities or electric variables
A single/multiple transducer for measuring physical quantities and variables includes a multiplexer unit for selecting the sensors of physical quantities and electric variables by the decoding of...
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4875042 |
Multi channel temperature controller utilizing electronic multiplexer
This multi channel temperature controller includes several temperature sensors, an electronic multiplexer which receives output signals from these temperature sensors and which sequentially...
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4875041 |
Time multiplexed control of air core gauges from a microprocessor address/data bus
An instrumentation system in which air core gauges are adapted for use with a microprocessor that provides data for the gauges in digital form via an address/data bus. One of the principal features...
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4875197 |
Method and apparatus for determining propagation velocities of elastic waves in a borehole
A method of measuring the propagation velocity of one or more of a plurality of different types of elastic waves in a borehole. It employs a source of elastic waves at a given location in a...
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4872007 |
Transducer for measuring pressure in gas-filled cables
A pressure transducer includes a multiplexer unit for the selection of pressure sensors by decoding a sensor address, thereby permitting a single power supply, a single counter and a single clock...
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