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7113125 |
Method for measuring material level in a container using RFID tags
A level of liquid of pulverent solids in a container (or volume of a liquid in the absence of gravity) is detected by using radio frequency identification (RFID) tags or similar transponders...
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7106247 |
Radar level gauge with antenna arrangement for improved radar level gauging
The present invention relates to a radar level gauge ( 1 ) comprising an antenna ( 2 ), a tank sealing ( 3 ), an electronics unit ( 4 ) and a waveguide feed ( 5 ) between the electronics unit ( 4 )...
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7106248 |
Through air radar level transmitter
A process control instrument comprises a control for generating or receiving a high frequency signal. A waveguide comprises a cylindrical housing closed at one end by a rear wall. A loop launcher...
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7098843 |
Automatic sensitivity control for radar level gauges
A radar level gauge system for determining the filling level of a filling material in a tank is disclosed. The system comprises an antenna device for emitting measuring signals towards the surface...
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7099662 |
Transceiver unit with interference-reducing antenna
A transceiver unit, particularly for measuring applications, comprising a transmitter ( 1 ) for generating a signal, an acquisition antenna ( 5 ) for emitting the signal in an acquisition volume...
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7095365 |
Apparatus for monitoring a field device
The invention relates to an apparatus for monitoring a field device for determining and/or monitoring a physical and/or chemical process parameter of a process medium with a first sealing stage...
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7088285 |
Test apparatus for a waveguide sensing level in a container
A test apparatus for a waveguide that senses levels in a container. The test apparatus includes a bridge with a test position where the bridge bridges the waveguide to simulate a simulated level....
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7075480 |
Level measurement device having electronics and antenna in one housing
Described is a radar filling level measuring device for non-contact measurement of a filling level of a filling matter in a vessel. A radar filling level measuring device including an electronics...
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7075479 |
Radar level-measuring device
A method and a device for measuring, by means of radar, in an enclosed space ( 1 ) in which a liquid ( 2 ) is stored, the level of a liquid surface ( 6 ), where the method involves the steps: a...
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7068213 |
Level meter
The invention relates to a microwave-operated level meter with a small blind zone, comprising an antenna for transmitting or for transmitting and receiving microwaves, a microwave generator...
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7053630 |
Level gauging system
A radar level gauge for measuring the level of a surface of a product stored in a tank by use of radar. The radar transmits microwaves towards the surface and receives microwaves reflected by the...
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7046189 |
Fill level measuring device and method for fill level measurement using the travel time principle
A fill level measuring device for measuring a fill level of a fill substance in a container and a method for fill level measurement using this fill level measuring device are provided. The fill...
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6995706 |
Method and an arrangement in a radar level gauging system
A method, an arrangement and a radar level gauging system for preventing interference, which radar level gauging system comprises at least two radar level gauges arranged to measure a filling level...
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6987481 |
Radar filling level measurement using circularly polarized waves
The present invention relates to a radar filling level measuring device capable of generating and receiving an elliptically polarized wave and, as a special case, a circularly polarized wave, using...
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6972712 |
Near zone detection in radar level gauge system
A method for processing a time domain reflectometry (TDR) signal used to determine at least one process variable for a material in a tank, wherein said TDR signal has been generated by a radar...
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6950055 |
Method and an apparatus for insulation of a radar level gauge
There is provided a radar level gauge using microwaves for measuring a level of a surface of a product in a tank, comprising an antenna for transmitting microwaves to the surface and receiving...
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6938475 |
Device for establishing and/or monitoring a predetermined fill level in a container
A device for establishing and/or monitoring a predetermined fill level in a container is provided, which also operates stably in liquids with surface waves, which includes: a mechanical oscillatory...
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6930632 |
Method and device for determining the level of a filling in a container
The invention relates to a method and a device for determining the level of a filling ( 1 ) in a container ( 2 ). The aim of the invention is to provide a method and a device for measuring said...
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6928867 |
Device for determining and/or monitoring the level of a filled substance in a container
The invention concerns a device for determining and/or monitoring the fill level of a fill material in a container with a transmitting-/receiving-unit, which produces and receives high frequency...
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6927734 |
Dielectric rod antenna
A dielectric rod antenna assembly for a level measurement system. The antenna assembly includes a transition structure housed within a coupling sleeve. The transition structure includes a...
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6922150 |
System for level gauging and providing alarms for a storage room using two gauging devices for determining a current level value
Method and device for calculating the level of the surface of a product in a storage room by a radar level gauging system, which includes a first gauging device for calculating a first value of...
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6917326 |
Vibratory cleaning mechanism for an antenna in a time-of-flight based level measurement system
An antenna assembly for use with a level measurement device for measuring the level of a material held in a container is provided. The antenna assembly includes an upper section for coupling to the...
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6914555 |
Method of detecting a fluid surface
A sensor for detecting contact of a fluid delivery probe with a fluid surface and for detecting fluid flow through the probe includes a first electrode disposed along a fluid flow path of the probe...
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6911935 |
Field interchangeable level measurement system
A microwave-based level measurement system having a planar microwave antenna configuration. According to another aspect, the microwave-based level measurement devices are field interchangeable with...
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6911929 |
Method and apparatus for directly digitizing microwave signals
Described is a method and an apparatus of directly digitizing microwave signals reflected at a filling product surface of a filling product present in a receptacle, in which method the microwave...
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6906662 |
Time domain reflectometry measurement instrument
A time domain reflectometry measuring instrument uses a microprocessor that provides added functionality and capabilities. The circuit electronics and probe are tested and calibrated at the...
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6907270 |
Method and apparatus for reduced rank channel estimation in a communications system
A method and apparatus for estimating a communication channel in a wireless communication system having multiple transmitter antennas using reduced rank estimation. The method exploits redundant...
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6879282 |
Guided wave radar level transmitter
A guided wave radar measurement instrument comprises a probe defining a guided wave radar transmission line. A pulse circuit is connected to the probe for generating a very fast stream of pulses on...
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6867729 |
Guided wave radar level transmitter with automatic velocity compensation
A guided wave radar transmitter comprises a probe defining a transmission line including a relatively low impedance target marker above an expected sensing region of the probe. A pulse circuit is...
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6864833 |
Time-base generator with self-compensating control loop
A time-base generator with a self-compensating control loop. The time-base generator is suitable for use in level measurement and time-of-flight ranging systems. The time-base generator includes a...
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6859166 |
Antenna device for radar-based level gauging
An antenna device in a radar-based level gauge mounted at an opening in a roof of a tank, the antenna device comprising at least one elongated radiating structure, which has a length that is...
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6856142 |
Method for determining and/or monitoring filling of a product in a container
The invention relates to a device for determining and/or monitoring filling of a product or the position of the boundary surface between two media or phases in a container. The device comprises a...
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6856281 |
Method and system for calibration of a phase-based sensing system
Calibrating the measurement of a distance between a transceiver and an object such as a radiating element (antenna) or a target by continuously changing the wavelength (frequency) of the...
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6842139 |
Separation frequency detection in a radar level gauge
A separation frequency detector circuit and a method for detection of a separation frequency in a radar level gauge. A first circuit element ( 1 ) is arranged to receive a first clock frequency,...
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6831594 |
Guided waver radar level transmitter
A guided wave radar measurement instrument comprises a probe defining a guided wave radar transmission line. A pulse circuit is connected to the probe for generating a very fast stream of pulses on...
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6828930 |
System and method in a radar level gauging system
The present invention relates to the field of radar level gauging systems, in which a level of a surface of a product stored in a container is measured. The gauging system comprises: a radar level...
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6825798 |
Rod antenna with installation thread
An antenna assembly suitable for use with a microwave-based level measurement system mounted on a vessel. The antenna assembly includes an installation thread, a shielded extension, and a rod...
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6806824 |
Apparatus and method for measuring the distance to an object
A radar fill level measurement sensor for measuring the level of material in a container, includes a transmit/receive circuit that transmits an electromagnetic pulse, and detects reflected...
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6795015 |
Bottom reflector for a radar-based level gauge
A bottom reflector for a radar-based level gauge, which measures a level of a liquid stored in a tank by means of transmitting a microwave signal towards the surface of the liquid from the top of...
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6765524 |
Method and device for liquid level measurement
A liquid level measuring gauging system including a radar antenna, a plurality of functionally independent radar measuring channels, and a feeder operably connected with the channels and operable...
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6759977 |
Method and apparatus for radar-based level gauging
A method for radar-based gauging of the level of a substance in a tank ( 13 ) having at least one interfering structure ( 16 a-c ), comprises the steps of: (i) transmitting a microwave signal in a...
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6750808 |
Process instrument with split intrinsic safety barrier
A process instrument comprises a housing, a terminal in the housing for connection to a two-wire process loop and an active element for sensing a characteristic of a process. A control circuit is...
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6734819 |
Level measuring device operating with microwaves
The microwave measuring device, which preferably operates with microwave bursts, serves to produce a measured value (X H ) representing the level of the contents of a vessel ( 200 ). It comprises a...
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6727845 |
Device for emitting high-frequency signals
The invention relates to a device for emitting high-frequency signals, comprising a signal generation unit, a signaling line, an emission cable and an antenna configured as a circular waveguide,...
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6701783 |
Device and a process for determining the positions of border areas between different mediums
A process for determining the position of the border areas between different mediums with the aid of electromagnetic waves, in which process a departing wave which is emitted from a wave...
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6700530 |
Circuit and method for generation of trigger signals
The present invention relates to a circuit and method for generation of trigger signals for a radar level gauging systems. A pulse-width modulator, has an input connected to a...
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6690320 |
Time domain reflectometry measurement instrument
A time domain reflectometry measuring instrument uses a microprocessor that provides added functionality and capabilities. The circuit electronics and probe are tested and calibrated at the...
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6681626 |
Level metering device working on the guided microwave principle, comprising a single-wire line and specific connection piece, and connection piece for a level metering device of this type
The invention relates to a connection piece ( 20 ), comprising an upper connection piece part ( 21 ) and a connection piece wall ( 22 ) disposed below said upper connection piece part ( 21 ) and...
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6680690 |
Power efficiency circuit
A radar level gauge for measuring a level of a surface of a product in a tank having a two-wire process control loop, output circuitry coupled to the two-wire process control loop for setting in...
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6677891 |
Method and device for transmitting and receiving electromagnetic waves
The invention relates to a filling level measuring device based on the principle of transit time measurement. An inventive filling level measuring device comprises an electronic unit ( 4 )...
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