The present invention provides a curb for measuring the flood depth in an urban area, more particularly, to a curb for measuring the flood depth in an urban area, which is configured to demarcate the boundary between a vehicular roadway and a pedestrian sidewalk to measure the flood depth so that the flood depth in the urban area can be measured without the necessity for additional installation of a separate structure. In particular, the present invention has an effect in that an air contact type water level gauge is installed in a first space of a main body to measure the flood depth, i.e., the level of flooding water based on the internal air pressure of a cylindrical tube so that a pressure sensor is not brought into close contact with the flooding water to prevent corrosion of the pressure sensor, thereby reducing the maintenance and repair costs.

Sub-resolution measurement of fuel in fuel tank. In an embodiment, data, which comprise discrete fuel levels in a fuel tank and fuel injection rates for an internal combustion engine, are received. The fuel injection rates are integrated over a traversed distance to produce a fuel consumption series, and the discrete fuel levels are clustered over the traversed distance to produce a fuel level series. The fuel consumption and fuel level series are synchronized into a model that is used to generate sub-resolution measurements of fuel levels between the discrete fuel levels.

Sub-resolution measurement of fuel in fuel tank. In an embodiment, data, which comprise discrete fuel levels in a fuel tank and fuel injection rates for an internal combustion engine, are received. The fuel injection rates are integrated over a traversed distance to produce a fuel consumption series, and the discrete fuel levels are clustered over the traversed distance to produce a fuel level series. The fuel consumption and fuel level series are synchronized into a model that is used to generate sub-resolution measurements of fuel levels between the discrete fuel levels.

Disclosed is a method for detecting a fault condition in the measurement of the level of a medium in a tank having a floating roof. The method uses a radar level gauge to measure the level of the floating roof and a level measuring device to measure the level of the medium. The method includes recording the level of the floating roof during a defined time interval that comprises some filling/emptying cycles of the medium, recording the level of the medium during said time interval, determining the deviations between the level of the medium and the corresponding level of the floating roof, centering the deviations between the level of the medium and the level of the floating roof reduced by the thickness of the floating roof with the corresponding level data, and generating an alert message when the centered deviations exceed a tolerance threshold.

A fuel remaining amount detector may include an arm supported rotatably to a body; an angle sensor configured to output first data in accordance with a relative angle between the body and the arm; a storage circuit configured to store conversion data; and a data conversion circuit configured to convert the first data to second data based on the conversion data. A manufacturing method of the fuel remaining amount detector may include creating the conversion data by performing processing for each of at least three predetermined angles, in which the processing includes: measuring the first data outputted by the angle sensor with the relative angle set to one of the predetermined angles; and storing a value corresponding to the one of the predetermined angles in the storage circuit as a value of the second data in association with the value of the measured first data.

The present invention provides a curb for measuring the flood depth in an urban area, more particularly, to a curb for measuring the flood depth in an urban area, which is configured to demarcate the boundary between a vehicular roadway and a pedestrian sidewalk to measure the flood depth so that the flood depth in the urban area can be measured without the necessity for additional installation of a separate structure. In particular, the present invention has an effect in that an air contact type water level gauge is installed in a first space of a main body to measure the flood depth, i.e., the level of flooding water based on the internal air pressure of a cylindrical tube so that a pressure sensor is not brought into close contact with the flooding water to prevent corrosion of the pressure sensor, thereby reducing the maintenance and repair costs.

A liquid level sensing device and a packing structure are provided. An outer tube fastener is connected to a signal module. A protective soft tube is connected to the outer tube fastener. An end of a double-layer flexible tube is connected to the protective soft tube. The double-layer flexible tube includes a flexible conductive outer tube and a fluorine-containing plastic inner tube coaxially attached in the flexible conductive outer tube. The fluorine-containing plastic inner tube is made of a flexible material. The flexible conductive outer tube is made of a conductive flexible material to form a grounding layer. A sensing module is disposed in the fluorine-containing plastic inner tube. A magnetic floater is assembled outside the double-layer flexible tube. A hanger is connected to another end of the double-layer flexible tube.

Methods and systems for validating a fluid level sensor having a floating element are provided. First readings are acquired from the fluid level sensor indicative of fluid levels sensed via the floating element during a first period of operation of the fluid level sensor. A validated range of fluid levels for the fluid level sensor is determined based on the first readings. At least one second reading is acquired from the fluid level sensor during a second period of operation, subsequent to the first period of operation. A starting position of the floating element for the second period of operation is determined based on the at least one second reading. When the starting position of the floating element is within the validated range, validating the at least one second reading.

An apparatus for determining a vertical level or density profile of a multi-layered fluid column including at least two different liquids, the apparatus comprising: an elongate vertical support member; and a plurality of measurement modules spaced apart, and supported along, the elongate vertical support member to form a vertical array of measurement modules; wherein each measurement module comprises: a support arm mounted to the elongate vertical support member and extending outwardly from the elongate vertical support member; a displacer carried on the support arm; and a force measurement device configured to measure a force attributable to a mass of the displacer mediated by a buoyancy of the displacer in the fluid column, wherein the plurality of measurement modules have a data connection to a data processing unit for transmitting measurement data from the plurality of measurement modules to the data processing unit, and wherein the data processing unit is configured to process the measurement data from the plurality of measurement modules and generate a level or density profile of the fluid column.

A method and system are described for detecting a fault of a fluid level sensing device associated with an aircraft engine, the fluid level sensing device arranged to measure a variance in a fluid level. The method comprises triggering a timer, while the timer is running, receiving a measurement indicative of the fluid level from the fluid level sensing device, resetting the timer when at least one timer-reset condition has been met, and outputting a fault signal when the timer reaches a timer threshold.