35results about "Fluid speed measurement using swirlflowmeter" patented technology

A wind energy installation is disclosed. The wind energy installation includes a rotor with at least one rotor blade. The wind energy installation includes at least one wind speed measuring system. The at least one wind speed measuring system optically measures the vibrations of an optical fiber due to vortex shedding.

The invention relates to a flow state sensor (10) for detecting a flow state at a body (16) that may be impinged on by a flow (12). A flow state sensor (10) that is of a simple construction and that is simple to evaluate is characterized in accordance with the invention by at least one frequency detecting device (20) for detecting at least one predefined frequency characteristic of the flow state. The frequency detecting device (20) has at least one oscillation element (22; 22a, 22b, 22c) excitable to resonant oscillatory movement (30) by a flow (12) and having a resonant frequency or natural frequency adapted to the predefined frequency characteristic, especially corresponding to the predefined frequency characteristic. Uses of the flow state sensor (10) in a flow measuring device (62) and in a flow measuring method, and an advantageous production method for the flow state sensor (10) are also proposed.

A flow speed sensor arrangement is provided for measuring a flow speed of a fluid stream relative to an object. The arrangement comprises a first obstructive body having a first forward facing surface and two lateral edges and a second obstructive body having a second forward facing surface. The second obstructive body is positioned in tandem relative to the first obstructive body so that the first and second forward facing surfaces face the same direction and so that when the first forward facing surface is presented to an incoming fluid stream, the first obstructive body is between the incoming fluid flow and the second obstructive body. A sensor array is disposed on the second forward facing surface. The first and second obstructive bodies are attachable to the object so that the first forward face is presented to an incoming fluid stream when the object is immersed in the fluid stream.

A flow meter for measuring the flow rate of a fluid, with a measuring tube that forms a measurement chamber through which the fluid can flow and with at least one bluff body that is disposed in the measurement chamber and wherein, additionally, a measuring body, which can be displaced due to the formation of vortices at the bluff body, is disposed downstream of the bluff body in the measurement chamber. The flow meter has at least one protrusion protruding into the measurement chamber and is formed upstream of the bluff body at an inner wall delimiting the measurement chamber.

The invention discloses a method using a non-extension type miniature sound detectors to perform flow measurement and belongs to the field of hydrodynamics. The method is characterized in that the miniature sound detectors are arranged inside a to-be-measured fan; by one sound detector A, a phase-determined sound signal is transmitted to one flow vortex K of a flow boundary layer and is reflectedto obtain the Doppler frequency shift speed components of the A and the vortex K in the direction i; in the similar way, by another sound detector B, the Doppler frequency shift speed component of thevortex k in the direction j is obtained; the different speed components are overlapped to obtain the speed and direction of the vortex K; the detectors transmit the pulse sound wave signals at constant time intervals to obtain the Doppler frequency shift components of multiple vortexes in corresponding directions; the sound detectors are arranged in a linear or planar vertical manner to measure flow planar speed fields and three-dimensional speed fields inside the flow boundary layer. The method is fast in instantaneous response, small in error, low in resource consumption and worthy of popularization.

The invention discloses an online wind speed measurement system and a test method. The measurement system includes a test pipeline, a monitoring board, a differential pressure detection circuit, a voltage signal acquisition conversion circuit, a single-chip microcomputer, a communication module, and a receiving terminal; the test method is as follows: 1) Place the measurement system in the wind field; 2) Measure the wind speed through the detection board, and convert the wind speed signal into a voltage signal; 3) Then collect the voltage signal through the differential pressure detection circuit, and transmit it after the voltage signal acquisition conversion circuit to the single-chip microcomputer; 4) process the received concave voltage signal through the single-chip microcomputer and restore it to wind speed; 5) the single-chip microcomputer sends the wind speed signal to the receiving terminal through the communication module. The invention has simple structure, convenient test and can accurately measure low wind speed.

A device and a method for determining the flow velocity of a fluid in a hollow body, including at least one disturbance device disposed in the hollow body and at least one sensor for identifying disturbances that are induced in the flow by the disturbance device, which is disposed at a certain distance downstream in the direction of flow from the disturbance device, wherein the disturbance device includes means for generating changeable disturbances in the fluid flow.

The invention discloses an electrical connector. The electrical connector includes a main body, a connection part, a first temperature-sensing element and a second temperature-sensing element, wherein: the connection part electrically connects the main body with a charging element arranged in a flow channel; The main body includes a first side and a second side parallel to the flow direction of the fluid, and the first temperature sensing element and the second temperature sensing element are respectively arranged on the first side and the second side opposite to each other in an electrically insulating manner. The invention also discloses a fluid state testing device and a fluid heat exchange system with electrical connectors. The electrical connector, fluid state testing device and fluid heat exchange system of the present invention can realize measurement and monitoring of fluid flow rate; measurement and monitoring of fluid pressure; measurement and monitoring of fluid resistance; measurement and monitoring without affecting the fluid flow field At least one purpose of the lateral vibration frequency of the electrical connector and suppressing the longitudinal vibration and / or lateral vibration of the electrical connector.

The invention relates to an intelligent pipeline flow velocity monitor, and belongs to the field of fluid monitoring. An inner tube in a pipeline is divided into a left cavity and a right cavity by a separator plate. The left cavity is internally provided with a circuit board, and the end portion thereof is equipped with a left end cover; left and right half shafts of a pin shaft are sleeved by a buffer spring and a balance spring respectively; the left half shaft extends out of the left end cover, and the end portion thereof is equipped with an exciter; the right half shaft extends into the right cavity from the separator plate; a right end cover enables two outer frames and at least one inner frame to be pressed in the right cavity; a metal substrate is pressed between the adjacent inner and outer frames and between the inner frames; a cantilever beam of each metal substrate is bonded with a piezoelectric wafer to form a piezoelectric vibrator, and the other end of the cantilever beam is fixed to the right half shaft; and one side of each outer frame and the two sides of each inner frame are provided with a limit surface and a sediment groove. The advantages are that power generation and flow velocity automatic measurement are realized synchronously through a coupling effect, and thus online monitoring of the flow velocity can be realized in a true sense; the monitor, configured along the length direction of the pipeline, is simple in structure and small in radial dimension, and can obtain required energy through the multiple piezoelectric vibrators easily; and each piezoelectric vibrator is reasonable in structure, large in generated energy and high in reliability.

A flow meter for measuring the flow velocity of a fluid includes a measurement tube that is axially bounded by at least one flange end and that forms a measurement space that can be flowed through by the fluid. At least one baffle is provided for generating interference in the flow, wherein the baffle is arranged in the measurement space. A detector for detecting the interference is arranged downstream of the baffle. An insertion element is introduced into the measurement tube and has a base portion. The base portion is arranged in the flange end. The insertion element has brackets that adjoin the base portion and that project into the measurement space, with the baffle being formed and its position in the measurement space being held between the brackets.

A flow meter for measuring the flow rate of a fluid, with a measuring tube that forms a measurement chamber through which the fluid can flow and with at least one bluff body that is disposed in the measurement chamber and wherein, additionally, a measuring body, which can be displaced due to the formation of vortices at the bluff body, is disposed downstream of the bluff body in the measurement chamber. The flow meter has at least one protrusion protruding into the measurement chamber and is formed upstream of the bluff body at an inner wall delimiting the measurement chamber.

The invention discloses a liquid flow velocity detection device and detection method based on positron technology and vortex street phenomenon. Firstly, the active positron nuclide is injected into the liquid, and then the liquid is injected from the access pipe of the detection component. The vortex generator causes the Kalman vortex street phenomenon to form when the liquid flows through the generator, forming a vortex, and then uses the gamma photon detection device to detect the gamma photons generated by the positron decay of the nuclide, and uses the number of gamma photon events detected The peak and valley changes of the vortex can get the shedding frequency of the vortex, so as to calculate the flow rate of the liquid through the pipeline per unit time. The invention can detect the gamma photon response line of the liquid that produces the Kalman vortex street phenomenon in a relatively harsh environment (such as high temperature, high pressure, corrosion, and impurities) in real time and non-destructively on-line or on-site, so as to realize the measurement of the flow rate of the liquid in the pipeline. Function.