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4901245 |
Nonintrusive acoustic liquid level sensor
A non-intrusive acoustic sensor system for detecting and displaying the location of the level of a liquid in a tank uses a piezoelectric transceiver mounted to a bottom exterior location on the...
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4898030 |
Propellant remaining gaging system
Apparatus for gaging the amount of liquid propellant remaining in a spacecraft (38) tank (1). The tank (1) comprises several preferably V-shaped channels 2A, 2B, 2C, 2D, hereinafter collectively...
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4897822 |
PLL sonic bilge pump switch
An apparatus for activating and deactivating a bilge pump in a marine vessel in response to the presence or absence of water or other fluid in the bilge area wherein a pair of acoustic transducers...
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4896536 |
Oscillation unit for filling level vibration limit switch
A device for determining the filling level in a container including an oscillator with two rotational oscillation elements (10, 12) of the same resonance frequency which oscillate oppositely. The...
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4890490 |
Liquid level monitoring
Ultrasonic Lamb waves are launched into a thin-section metal plate (10) which extends generally vertically above the contents of a vessel. As long as the lower end (18) of the plate (10) is above...
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4868797 |
Time-shared AGC for ultra-sound liquid level meter
An ultrasonic, echo-ranging instrument for measuring liquid level, the instrument including a transducer dispoed at a fixed position directly above the liquid surface. The transducer is excited to...
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4864856 |
Liquid level detecting device
A liquid level detecting device comprises a vibrator for vibrating a sample vessel containing a sample solution, and a piezo-electric element provided on a suction member having an opening for...
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4855966 |
Method and apparatus for monitoring bridge structures for scouring
In one embodiment of a technique for monitoring scouring around structural members which are at least partially submerged in the soil bed material at the bottom of a body of water, the distance...
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4853694 |
Electronic tank level monitoring device
The present invention is an electronic liquid level monitoring apparatus for a in-ground storage tank. An ultrasonic transducer is disposed in a fill pipe head device which enables proper placement...
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4853901 |
Automatic liquid level recording device
Apparatus and method for obtaining from a well drilled into the subsurface of the earth the information necessary to determine the location of the liquid surface in same. A source of pressure...
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4850213 |
Filling level measuring device for measuring the filling level of explosive or aggressive media in a container
A filling level measuring device for measuring the filling level of explosive media in a container is provided. The device includes a sonic or ultrasonic transducer and a mounting flange for...
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4847600 |
Son-air detector
In fossil boilers and steam generator of fossil boilers and nuclear power plants, a son-air detector using ultrasonic transducers is employed with a glandless motor pump which may have a vertical...
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4841770 |
Apparatus and method for determining the amount of substance in a vessel
Apparatus (1) for measuring the amount of a substance (2) in a vessel which comprises a detector means comprising at least two electrodes (3) adopted to generate an electric signal in response to...
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4841256 |
Piezoelectric phase locked loop circuit
A structural member having a piezoelectric transmitter film and a piezoelectric receiver film adhered thereto. The transmitter film produces a vibration upon activation by a voltage controlled...
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4839590 |
Piezoelectric actuator for magnetostrictive linear displacement measuring device
A liquid level detector of the type in which a magnetostrictive wire extends through the liquid level measurement range and is captured in a tensioned vertical orientation within a stainless steel...
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4837750 |
Apparatus for displaying depth sounding data with nautical range
Apparatus and a method for displaying depth sounding data with nautical range are disclosed for use on vessels or the like, the device including a transceiver for transmitting an acoustic signal...
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4821569 |
Parasitic echo pulse rejector for ultrasonic liquid level meter
An ultrasonic echo-ranging meter for measuring the changing level of liquid in a tank or open channel, the meter including a transducer at a raised position above the liquid surface. Pulses of...
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4815323 |
Ultrasonic fuel quantity gauging system
A method of measuring aircraft fuel quantity and density in a fuel container using an ultrasonic transducer; a stillwell liquid fuel; a computer control, an indicator and an altitude sensor. The...
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4811601 |
Method and apparatus for measuring the change in volume with change in temperature of liquid in tanks
The rate of leaking from a liquid storage tank may be accurately determined by measuring the change in volume of the tank over a period of time, and during said same period (or during a period...
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4811595 |
System for monitoring fluent material within a container
The acoustical energy output of a source is varied in frequency between limits to sweep a frequency band encompassing cavity resonance conditions which depend on the quantity of a fluent material...
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H000608 |
Detecting multiple phase flow in a conduit
Multiple phase flow is detected and characterized in a fluid-containing conduit using a compressional wave acoustic transducer in the pulse-echo mode. The acoustic energy is transmitted in a...
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4797819 |
System for determining replenishment needs on a product display by measuring vacant space
The replenishment quantity for each article on a sales display is determined from the measurement of the length left on the peg, this measurement being performed by means of either: (a) a gun which...
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4793178 |
Method and apparatus for generating data and analyzing the same to determine fluid depth in a well
Method and apparatus for generating data and analyzing the same to determine fluid depth in a well. A gun assembly includes a pressurized chamber for initiating an acoustic pulse and a transducer...
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4790183 |
Acoustic impedance system for liquid boundary level detection
A liquid boundary level detector employing an open-ended conduit which directs pressure waves toward a liquid boundary layer. The conduit is moved from a starting position toward the liquid...
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4787407 |
Method and apparatus for the detection of the fluid level in a tank being filled
Acoustic signals are transmitted through the fluid flow of a fuel delivery pump to a tank to be filled. From reflection signals the fluid level in the tank is detected and a timely disconnection of...
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4787240 |
Liquid measurement arrangement
A pipe section through which a liquid passes includes a transmitting and receiving transducer diametrically opposed on the surface of the pipe and arranged to project acoustic energy through the...
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4785664 |
Ultrasonic sensor
An improved ultrasonic system for detecting the level of a material that has a surface, for example a liquid level inside of a tank, which improves the ability to detect levels particularly when...
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4785663 |
Level control instrument
A level control instrument for controlling and/or indicating the filling level for liquid, powder, granular, especially light-weight bulk material in a container. The level is determined by a...
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4777821 |
Measuring apparatus for measuring the alteration of a liquid quantity, especially the quantity of oil in an internal combustion engine
A measuring apparatus for accurately measuring the alteration of a liquid quantity, especially the quantity of oil in an internal combustion engine, in a reservoir containing said liquid,...
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4770038 |
Ultrasonic depth gauge for liquids under high pressure
An ultrasonic depth gauge 20 for liquids under high pressure is comprised of a transducer assembly 21 and a supporting electronics unit 22. The transducer assembly is mounted into the bottom wall...
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4765186 |
Liquid level detector by guided elastic waves
The liquid level detector using guided waves, comprises a first transducer situated out of the liquid for sending an incident elastic pulse which propagates in an elongated guide of which the lower...
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4748846 |
Tank gauging system and methods
Ultrasonic apparatus for measuring and remotely displaying the amount of liquid in a tank, the amount of water in the tank and the velocity of sound through the liquid in the tank is described with...
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4735097 |
Method and apparatus for measuring fluid characteristics using surface generated volumetric interrogation signals
A method and apparatus for measuring fluid characteristics use a non-invasive ultrasonic system for generating spatially extended signals into a volume of a fluid and detecting said signals for...
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4715226 |
Ultrasonic apparatus for determining the amount of liquid in a container of known volume
An ultrasonic apparatus for determining the amount of liquid in a container of known volume includes at least a pair of ultrasonic transducers which are mounted a known distance apart relative to...
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4704902 |
Acoustical volume/pressure measurement device
The apparatus consists of a mechanical acoustical driver producing sound vibrations in a fluid, such as a liquid or gas, within an enclosed space. A pickup transducer positioned within the tank...
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4703652 |
Piezoelectric type liquid level sensor and fabricating method thereof
Piezoelectric type liquid level sensor for detecting whether the level of various liquids such as oil of an internal combustion engine, a generator or the like is a predetermined value or higher or...
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4700569 |
Method and arrangement for signal transmission in ultrasonic echo sounding systems
An ultrasonic echo sounding apparatus disposed at a measuring location transmits ultrasonic pulses in successive transmission periods. The echo pulses received after reflection at a target are...
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4683752 |
Ultrasonic probe
An ultrasonic probe for measuring the velocity of sound in a liquid consists of a tube (12), closed at its lower end, and arranged to extend into the liquid, a reflector (20) alongside the tube but...
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4679430 |
Ultrasonic liquid interface detector
A sensor for detecting an interface of a liquid in a container comprises a transmitter and a receiver of ultrasonic waves, each situated outside the container, and coupled to the wall of the...
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4676098 |
Vessel for bulk materials
A vessel for bulk materials is described whose level can be continuously determined from outside during the filling or emptying process. To this end, at least one AE (acoustic emission) transducer...
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4677305 |
Opto-acoustic fuel quantity gauging system
An opto-acoustic fuel quantity gauging system, including: a tank; an ultrasonic energy source; an optical power source; a fiber optic cable; an ultrasonic sensor; an optical detector and a signal...
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4675660 |
Container liquid level sensing utilizing a filling tube
Procedure to measure the level (14) of a liquid (13) by means of elastic waves, such liquid (13) being contained within an axially moving tube (11) and cooperating with a filler tube (12), the...
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4675854 |
Sonic or ultrasonic distance measuring device
The sonic or ultrasonic distance measuring device used for example to measure the filling level in a container comprises an electroacoustic transducer which operates alternately as transmission...
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4668945 |
Detector of bubbles in blood
A device for detecting the presence of a gaseous fluid in relation to a predetermined level of liquid in an elastically deformable vessel comprises a U-shaped body capable of accommodating within...
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4664091 |
Engine control
A stream of water or a water-methanol mixture is injected into the induction passage of a spark ignition internal combustion engine, and a probe disposed in the induction passage is contacted by...
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4658834 |
Medical apparatus for monitoring body liquid discharge
A medical apparatus for automatically measuring and displaying the quantity of a liquid discharged by a patient during a defined real time interval. The apparatus is comprised of a reusable housing...
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4644789 |
Liquid level indicator system
A liquid level indicator system is provided for sensing the presence of liquid at a preselected level in a liquid containing container. A piezoelectric reed transducer is disposed in the container...
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4614115 |
Ultrasonic process and apparatus for monitoring and measuring the evolution with time of physico-chemical, biological or bacteriological phenomena
Ultrasonic process and apparatus for monitoring and measuring the evolution with time of physico-chemical and biological phenomena. There is plunged into the medium or media (4) to be monitored a...
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4610164 |
Method of detecting liquid level
An ultrasonic wave transmitter and an ultrasonic wave receiver are disposed in a tank in any positional relation to each other so long as the wave transmission and wave reception surface do not...
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4601200 |
Measuring apparatus
A measuring apparatus, including a measuring device; a measuring element secured at one of its ends to the measuring device; a measuring body secured on the free end of the measuring element; a...
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