76results about "Level indicator with buoyant probes" patented technology

A device and method for sensing fluid characteristics, including, temperature, pH and chemistry, comprises a switch affixed to or embedded in a container of a size, shape and density such that said container floats stable in said liquid sensors which measure and report other characteristics of the liquid, such as temperature, pH, viscosity, chemistry or biochemistry.

An apparatus for detecting the displacement of a magnet is to be provided. The errors on the detected value due to the variation of temperature or that with time are hardly caused in the apparatus. The apparatus can detect the displacement in high resolution and precision. The apparatus is simple in its structure, and it can be expected that the apparatus can be manufactured in low cost. The apparatus is not limited in its application by the range of the displacement of the magnet. Further, a method for detecting the displacement of a magnet will be provided. An apparatus for detecting the displacement of a magnet M, the apparatus being characterized in that it further comprises a plurality of hall devices H0-H7 disposed in a predetermined spacing DP along a displacing path of the magnet in parallel thereto, wherein each of said hall devices includes a magnetically sensitive surface HS through which a magnetic flux from said magnet M permeate to generate an output the polarity and the voltage of which are depend on the direction and the density of the magnetic flux, and said magnetically sensitive surface HS of each hall device is disposed in a predetermined distance from the displacing path of the magnet M in parallel with the direction defined by the magnetic poles, and wherein two adjacent hall devices inverted in the polarity of their output voltages are detected to determine the general position of the magnet, and the precise position of the magnet between these two hall devices is determined on the basis of the output voltages.

Methods and apparatus for measuring density of a fluid. The apparatus includes a shaft adapted to be positioned within a fluid and a biased float disposed on the shaft and capable of movement along the shaft. The apparatus further includes a displacement sensor for detecting a position of the float along the shaft. A method of sensing the density includes positioning the biased float in the fluid and sensing the position of the float to obtain data representative of the density of the fluid.

What is disclosed is a tank fullness monitoring system. The tank fullness monitoring system includes a plurality of buoyant sensor nodes coupled in series along a line, where the buoyant sensor nodes are configured to hang in series along the line, and where each of the buoyant sensor nodes is configured to indicate when floating at a fluid interface. The tank fullness monitoring system also includes a control node attached to the tank and coupled to a first one of the buoyant sensor nodes, and configured to monitor the buoyant sensor nodes.

In accordance with an aspect of the present invention, a system for providing storage tank measurements to a remote location is provided. The system includes a control box configured to take a plurality of readings from within the storage tank and transmit those readings to a master computer. The master computer is configured to receive and store the plurality of readings, and in response to receiving a request for a measurement for the storage tank, calculate the requested measurement utilizing the received readings. The calculated measurements are then transmitted to the device requesting the measurements.

A multiphase-liquid level sensing system for sensing a layer depth and thickness of a liquid of a first phase that floats on a liquid of a different second phase includes an elongated stem that defines an elongated cavity. A float, which exhibits a sensible property, is disposed coaxially around the elongated stem and has negative buoyancy relative to the liquid of the first phase and positive buoyancy relative to the liquid of the second phase. A level sensor senses the sensible property and indicates a second phase liquid distance from the float to the bottom of the stem. An overburden sensor extends downwardly from the stem senses total liquid thickness of the liquid above the overburden sensor. A computational circuit calculates a layer depth and thickness of the liquid of the first phase, based on input from the level sensor and the overburden sensor.

Fluid monitoring and sampling apparatus including a buoyant element suspended from a filament, a load sensor that senses a tensile force in the filament, a rotation sensor that senses the rotation of the spool around which the filament is wound, wherein the buoyant element is adapted to be initially at least partially submerged at an equilibrium position at an initial level of a fluid, thereby creating a nominal tensile force in the filament, wherein a change in the level of the fluid changes the tensile force in the filament, a positive change in the tensile force corresponding to a downward movement of the buoyant element and a negative change in the tensile force corresponding to an upward movement of the buoyant element, wherein the rotation of the spool corresponds to an amount of distance traveled by the buoyant element, and a sensor for sensing a property of the fluid, the sensor being in communication with a processor above ground.

A device for determining the density of a fluid comprises a buoyant body, a spring which engages on the buoyant body and whose elastic deformation is a measure of the buoyancy force of the buoyant body, and a magnet which is designed to sense the elastic deformation of the spring by means of a magnetostrictive position-measuring system. The spring is compressively loaded and, if the buoyancy force of the buoyant body is greater than its weight, said spring acts on the buoyant body underneath its centre of buoyancy. The device is preferably used to determine the density of fuel, a magnetostrictive filling level measuring system which is present in a storage tank for fuel being used.

A system for measuring a level of dry bulk material within a container has a columnar device supported vertically within the container. The columnar device has a closed lower end and openings through a sidewall thereof for allowing dry bulk material within the container to flow into and out of the columnar device. A load cell is used to measure a weight of the dry bulk material within the columnar device, which is then correlated to the level of dry bulk solids within the container. The columnar device and the sidewall openings therein can be provided in various shapes and configurations.

There is provided a liquid-level gauge for accurately measuring a liquid-level height of fluid to be measured. In the liquid-level gauge, a float having a uniform cross-sectional form in the height direction and a specific weight value small than that of liquid is dipped in the liquid. The float is supported by an optical fiber at a constant height such that its upper end always projects from the liquid level. One end of the optical fiber is connected to an optical fiber strain gauge and a strain detector is turned round between fiber support members. When the float receives buoyancy from the liquid, tension is applied to the strain detector of optical fiber to generate strain therein. By detecting the strain by means of an optical fiber strain gauge, a liquid-level height can be measured.

The invention discloses a servo liquid level meter which comprises a floater which is provided with measuring elements, such as a temperature sensor, a pressure sensor and an interface sensor, etc., and an operating circuit is arranged in the floater, a contact is arranged on the shell of the floater and connected with the operating circuit in the floater. When the floater moves up and down, the contact can be contacted or disconnected with a contact electrode, when the contact electrode is contacted with the contact, a mainboard of the liquid level meter detects the voltage of a power circuit in the floater by the contact, and charges the power circuit in the floater according to the detection result, the operating circuit can also exchange information with the exterior by the contact. The servo liquid level meter has the advantages of convenient usage, stable working voltage and accurate measurement.

A system for monitoring coastal underground water is disclosed. The system includes a freshwater/saltwater interface position tracking device that is inserted into an observation well used for observing coastal underground water and can move on a freshwater/saltwater interface according to a change of buoyancy; and a first measuring sensor that is inserted into the observation well so as to be placed at a position above the freshwater/saltwater interface position tracking device and has a distance measuring unit used for measuring a first distance between the freshwater/saltwater interface position tracking device and the first measuring sensor, wherein the first measuring sensor has a first signal output unit used for outputting a signal indicative of the measured first distance.

The invention relates to the technical field of water level observation, in particular to an underground water level observation device for hydrogeology, which comprises an observation box, a storage battery is fixed on the inner bottom surface of the observation box, a threading hole is formed in the bottom surface of the observation box, a measuring rope is inserted in the threading hole, a conductive wire is inserted in the middle of the measuring rope, and the conductive wire is connected with the storage battery. A weight box is fixed to the bottom of the measuring rope, a probe is fixed to the bottom face of the weight box, and the probe is electrically connected with the electric lead; according to the scheme, the top end and the bottom end of the measuring rope are positioned through the top positioning mechanism and the bottom positioning mechanism, inaccurate measurement caused by shaking of the bottom end of the measuring rope at the well bottom can be prevented, the measuring rope can be always kept in the middle of the measuring well, the measuring rope does not make contact with the inner wall of the measuring well, and the measuring accuracy is improved. The situation that the measuring rope is bent due to the fact that the measuring rope is jacked by obstacles such as broken stones or protrusions on the inner wall of the measured well is avoided, and the measuring precision is further improved.

An electromechanical, fill-level, measuring device, comprising: a float, an outer drum with an outer ring of magnets, an inner drum with an inner ring of magnets, electromagnetic measuring elements, a measuring shaft with, and a servomotor with an drive shaft. The drive shaft is coupled with the measuring shaft via a transmission, wherein the servomotor rotates the measuring shaft via the transmission as a function of a control signal ascertained from the difference value of the measuring elements, so that, by relative movement between the outer and inner drums produced by a change of the liquid level to be measured, the difference value is returned to zero and from the rotation of the measuring shaft the current fill level measured value is ascertained. Sensor electronics is arranged on the measuring shaft within the inner drum, and radial, rotary transformer is embodied on the measuring shaft for transmitting at least the control signals from the sensor electronics to the main electronics and supplying for at least the sensor electronics with energy.

The invention discloses an automatic detection device and method for an underwater concrete casting interface. The detection device comprises a probe, a lifting mechanism, a control device and a lifting height detector, the probe comprises a hanging bracket and a balance weight, and the volume weight of the balance weight is equal to that of concrete cast in a concrete casting cavity; a connecting rod is arranged on the upper portion of the balance weight, a trigger switch is arranged in the hanging bracket, and the connecting rod serves as a control rod controlling the trigger switch. The detection method includes the following processes that firstly, the concrete casting interface is detected for the first time, wherein the process includes the first step of lowering the probe and determining the lifting height, and the second step of detecting the concrete casting interface; secondly, the concrete casting interface is detected subsequently, wherein the process includes the first step of lifting the probe, and the second step of lowering the probe, determining the lifting height and detecting the concrete casting interface. The detection device is reasonable in design, easy and convenient to use and operate and good in use effect, the process of automatically detecting the underwater concrete casting interface can be easily, conveniently and rapidly completed, and the detection result is accurate.