System for determining train information relative to a train moving along a railway track having a pressure measuring device placed along the railway track and arranged to measure the speed of an airflow generated by the train when moving on the railway track, and to generate a speed signal; and a controller arranged to receive said speed signal and to determine train information relative to the train in function of said speed signal.

System for determining train information relative to a train moving along a railway track having a pressure measuring device placed along the railway track and arranged to measure the speed of an airflow generated by the train when moving on the railway track, and to generate a speed signal; and a controller arranged to receive said speed signal and to determine train information relative to the train in function of said speed signal.

A mechanical coupling for rotary devices, whereby a wind vane or other rotary tool, can be replaced without the use of a tool. In a preferred embodiment, the invention provides a coupling arrangement for a rotary device and a spindle supported for rotation, the coupling being enabled by a resilient body which acts upon a spheroidal locking member such as a ball bearing. In particular, the present invention provides a coupling arrangement for a wind vane or an anemometer rotating body comprising impeller cups, which impeller cups and rotating body are required for removable fitment, without the use of tools.

An aerodynamic measurement probe intended to measure a local angle of attack of an air stream flowing along the fuselage of an aircraft, includes a support and a shaft that is able to rotate about a longitudinal axis with respect to the support, the support and the shaft being configured to form between them a gap, passing around an annular tab at the end of the shaft in the support, making it possible to maintain a functional clearance to allow one end of the shaft to pivot freely in the support, and communicating with an impurity discharge circuit, the gap comprising an inner annular groove about the axis of rotation, made in the support, and opening out away from the axis directly onto the end part of the annular tab, the profile of the inner groove being rounded.

A system for analyzing velocity distribution of water flow includes a water outlet, a thermographic camera and a processing device. The water outlet is disposed above a water body for discharging sample water thereto, the sample water having a temperature higher than that of the water body. The thermographic camera is disposed above the water body for capturing first and second thermographic images of the water body at different time instances after the discharge of the sample water. The processing device calculates a flow velocity of the sample water in the water body based on the first and second thermographic images, and to analyze the velocity distribution of the water body according to the flow velocity of the sample water.

An emission monitoring system includes at least one gas analyzer for measuring a concentration of a first gas and a concentration of a second gas, a positioning system for determining the location of the at least one gas analyzer when the concentration of the first gas is measured. A method for monitoring emissions at an industrial site and a computer-implemented event detection system applies the steps of detecting the presence of a gas emission event based on a first detection ratio calculated from the measured concentration of the first gas, the measured concentration of the second gas, a background concentration of the first gas and a background concentration of the second gas.

An emission monitoring system includes at least one gas analyzer for measuring a concentration of a first gas and a concentration of a second gas, a positioning system for determining the location of the at least one gas analyzer when the concentration of the first gas is measured. A method for monitoring emissions at an industrial site and a computer-implemented event detection system applies the steps of detecting the presence of a gas emission event based on a first detection ratio calculated from the measured concentration of the first gas, the measured concentration of the second gas, a background concentration of the first gas and a background concentration of the second gas.

A flow of air induces vibration of a tip of an airflow sensor. A cantilever coupled to the tip vibrates as the tip is displaced, and a piezoelectric element associated with the cantilever generates an electrical signal in response to mechanical stress or strain induced by vibration of the cantilever. A control element that is in communication with the piezoelectric element of the cantilever receives the electrical signal and derives at least one parameter indicative of the flow of air sensed by the sensor. The control element communicates or otherwise transmits an output signal that is indicative of the parameter to an output device to display sensor data to a user as desired.

A moving-vane angle of attack probe is provided. The moving-vane angle of attack probe comprises: a vane having opposed first and second vane surfaces that define a leading edge and a trailing edge, the first and second vane surfaces, each extending between the leading edge and the trailing edge; a first vane opening located on the leading edge; at least one exhaust opening; a vane conduit extending between the first vane opening and the exhaust opening such that the first vane opening and the exhaust opening are in fluid communication, the vane conduit defining at least an interior chamber between the first and second vane surfaces; and a pitot-tube located within the interior chamber such that in use it receives air that enters the interior chamber via the first vane opening.

A moving-vane angle of attack probe is provided. The moving-vane angle of attack probe comprises: a vane having opposed first and second vane surfaces that define a leading edge and a trailing edge, the first and second vane surfaces, each extending between the leading edge and the trailing edge; a first vane opening located on the leading edge; at least one exhaust opening; a vane conduit extending between the first vane opening and the exhaust opening such that the first vane opening and the exhaust opening are in fluid communication, the vane conduit defining at least an interior chamber between the first and second vane surfaces; and a pitot-tube located within the interior chamber such that in use it receives air that enters the interior chamber via the first vane opening.