66 results about "Flow interference" patented technology

The invention discloses a water dispenser used water system leak detection device and method, which mainly adopt the flow interference detection method and a low-cost gas flow detection device consisting of a high-sensitivity gas flow detection pipe and a high-sensitivity induction detector, rather than a high-price precision flowmeter. When the fact that pressure gas for detecting a water system of the water dispenser enters the water system of the water dispenser and is balanced is detected, an air floater inside the gas flow detection pipe can drift as long as leakage exists in the water system of the water dispenser, the displacement of the floater can be detected by the induction detector immediately, and the detecting system locks a signal and alarms immediately.

A method of propagating a brake pipe braking command along a fluid carrying brake pipe (14) interconnecting members of a transportation system, the transportation system comprising a communication system (24) for exchanging information between a controlling member of the system and controlled members of the system includes identifying an unexpected brake pipe fluid flow condition at a first controlled member (e.g. 12) of the transportation system inconsistent with a communication system braking command issued by a controlling member of the transportation system. The method also includes disabling an ability of the first controlled member to control a brake pipe flow so that a brake pipe braking command issued by the controlling member is propagated along a brake pipe to a second controlled member of the transportation system downstream of the first controlled member with reduced brake pipe fluid flow interference from the first controlled member.

The present invention claims a combined interference phase alignment solution based on Bayes estimation and inter-data flow power allocation. Firstly, optimal estimation of a current CSI is obtained by means of Bayes estimation, such that a sending end can obtain better CSI. Secondly, during forward communication, an interference suppression matrix is designed by maximizing a ratio of desired signal power to an inter-cell interference and noise power sum; during reverse communication, a pre-coding matrix is designed by maximizing an overall signal interference ratio of a receiving end; and the forward communication and the reverse communication are iteratively computed till convergence to obtain optimal pre-coding and interference suppression matrices. Then, a water injection power allocation solution applied to interference alignment is combined. Finally, inter-data flow interference is rotated into a signal space of a target receiving data flow by aligning phases of a sending signal flow and a receiving signal flow. Simulation shows that compared with other robust algorithms, the solution has a certain performance advantage in either ideal CSI or delay error CSI.

An atmosphere controlled, resealable foodstuff container includes a base tray and a cover. The cover and base tray are constructed of a substantially gas impermeable material. The cover and base tray include resealing members. When connected, the cover and base tray define a generally enclosed and sealed interior space for foodstuffs. The container includes at least one atmosphere control member, such as a membrane, which controls the flow of gases through an opening in the container. The member may be located over a recessed opening in the cover to permit the containers to be stacked without gas flow interference. A label extends over the recess, thus obscuring the membrane from view to the purchaser without affecting the membrane atmosphere control function. The base tray may be opaque for use as a serving tray and the cover transparent to permit viewing of the product.

The invention provides a dust discharging and preventing as well as cooling device for inner hole plasma spraying. The device comprises an air draft dust-screening drum, an exhaust fan, a cooling air nozzle, a cooling air ring I and a support; a cylinder arranged on an upper side of the air draft dust-screening drum is communicated with the exhaust fan via an aluminum foil hose; a lifting mechanism is used to drive an inner hole spray gun to make vertical up and down movement with the air draft dust-screening drum and spray the inner wall of an inner hole workpiece fixed on a rotating mechanism; jet spots sprayed on the inner wall of the inner hole workpiece by the inner hole spray gun are externally locally reduced in temperature via the cooling air nozzle fixed on the cylinder; and open holes formed on the cooling air ring I blow cooling air to a gap to realize cooling and dust preventing for of the inner hole workpiece. The device can effectively reduce the temperatures of the inner hole spray gun and the inner hole workpiece in the inner hole spray process, ensure long-time work reliability of the inner hole spray gun and reduce coating heat stress on the inner wall of the inner hole workpiece and air flow interference and dust pollution of the inner hole workpiece.

A flat pipe with variable flow capacity comprises a main body shaped as a flat tube wherein opposing ridges are installed at the inner upper and lower positions of the main body, and thin-film spacers are installed between said pairs of ridges, forming multiple passages in the main body. Due to the flexibility of the thin-film spacers, the passages of the main body may stretch to a larger diameter to adjust to increased flow. If the flow is significantly enlarged, the main body will flex at the ridges causing the thin-film spacers to separate which in turn opens flow to the main body, essentially creating one main passage with a large diameter. When flow is stopped or decreased, the main body will restore elastically and resume shape as a flat pipe. According to the above, the present invention discloses a pipe which is easily stored and prevents twisting which could result in deformation, breakage and flow interference.

The present invention provides a heating device with cathode oxygen depletion (COD) function for a fuel cell vehicle, in which an existing COD and a heating device for improving cold startability of the fuel cell vehicle are integrated. For this purpose, the present invention provides a heating device with COD function for a fuel cell vehicle, the heating device including: a housing having an inlet and an outlet formed on both ends thereof; a start-up heater and a shut-down heater provided in parallel on one side of the housing in a direction perpendicular to a coolant flow direction; and a plurality of heaters for heating coolant provided in parallel on the other side of the housing in a direction perpendicular to the coolant flow direction, wherein cross sections in the coolant flow direction of each of the respective heaters change periodically along the longitudinal direction of the heater so as to cause a flow disturbance.

An atmosphere controlled, resealable foodstuff container includes a base tray and a cover. The cover and base tray are constructed of a substantially gas impermeable material. The cover and base tray include resealing members. When connected, the cover and base tray define a generally enclosed and sealed interior space for foodstuffs. The container includes at least one atmosphere control member, such as a membrane, which controls the flow of gases through an opening in the container. The member may be located over a recessed opening in the cover to permit the containers to be stacked without gas flow interference. A label extends over the recess, thus obscuring the membrane from view to the purchaser without affecting the membrane atmosphere control function. The base tray may be opaque for use as a serving tray and the cover transparent to permit viewing of the product.

The invention relates to an unmanned aerial vehicle which takes off and lands down vertically. The unmanned aerial vehicle has pneumatic arrangement of double bodies and remote duck wings, a power system of the unmanned aerial vehicle is composed of four propellers with tilting mechanisms, which are arranged in a 'Y'-shaped manner, variable wings based on flexible structures are adopted as wings of the unmanned aerial vehicle, and a control surface of the unmanned aerial vehicle is of a flexible seamless control surface structure. The unmanned aerial vehicle has the beneficial effects that dueto adoption of a tiltable multi-rotor wing system, vertical lifting and landing down are achieved, and a 'waste weight' caused by a useless power system is avoided in level flight; due to adoption ofthe power system between the two bodies, air flow interference between the propellers and the bodies is avoided; due to adoption of the double bodies, the body rigidity can be improved, and the bodyweight can be reduced; due to adoption of the remote duck wings, the lift coefficient of the whole vehicle is increased, the position of a pneumatic center is adjusted, the rigidity of the vehicle isimproved, and the weight of the vehicle is reduced; due to adoption of the self-adaptive wings based on flexible structures, the pneumatic appearances of the wings are at optimal states constantly; and due to adoption of the flexible seamless control surface, the wings and the control surface are in seamless connection, so that interference resistance is reduced.

The invention discloses an axial flow fan ventilation wall which comprises an axial flow fan with the diameter of D. The axial flow fan ventilation wall further comprises two to three fan sets. Each fan set is composed of a plurality of axial flow fans. Impeller shafts of the axial flow fans in the same fan set are adjacent and parallel to one another. All the impeller shafts in the same fan set are located on the same plane which serves as the set cardinal plane. An included angle of 7 degrees to 13 degrees is formed between the set cardinal planes of every two adjacent fan sets, wherein the axial flow fans in one fan set sequentially correspond to the axial flow fans in the other fan set one to one, the central distance between every two corresponding axial flow fans is X, and X is larger than or equal to 1.8D and smaller than or equal to 2.5D. By integrating a plurality of small axial flow fans into a set and making a plurality of sets matched to form a complete ventilation wall, the air flow output by the ventilation wall is just like the air flow output by a single large axial flow fan. The included angle is formed between every two adjacent fan sets, and therefore the air flow interference between the fan sets is effectively avoided, air flow is stable, and the rated working condition efficiency is improved.

Systems and methods for flow sensing in a conduit are provided. One system includes a flow disturber disposed in a flow conduit and configured to impart a flow disturbance to the fluid flow. The system further includes a plurality of flow sensors disposed in the flow conduit and responsive to flow characteristics in the flow conduit. The system also includes a frequency resolver configured to determine frequency information related to the fluid flow based on the flow characteristics. The frequency resolver uses one or more time sample windows to select data samples for use in determining the frequency information, wherein a length of one or more of the time sample windows is based at least in part on the flow characteristics. The system additionally includes a processor configured to determine a flow rate of the fluid flow in the flow conduit using the frequency information.

The present invention is a method of minimizing steam boiler pressure changes or turbine power changes during turbine control valve operational safety test stroking. The method of the present invention uses control valve positions as feedback into a compensation algorithm to minimize flow disturbance caused by the closing and reopening of a turbine control valve during periodic operational testing. By maintaining the total mass flow through several parallel turbine inlet control valves constant, the steam generator pressure is maintained constant, and the inlet pressure regulator is unaffected during inlet control valve testing. Maintaining the total mass flow through several parallel turbine inlet control valves constant also minimizes turbine power changes during inlet control valve testing. In addition, the monitoring of additional process parameters is not needed. The position (valve stem lift) of the individual parallel valves is used for closed loop control of inlet valve position, and is sufficient for the purpose of maintaining constant flow.

The invention discloses a test device of a piezoelectric energy collector under wake flow interference. The device comprises a water tank capable of providing waterflows with different flow velocities, an end portion mass block and a disturbed flow mass block are immersed into water through erection, one side of the end portion mass block is provided with a piezoelectric fiber plate, and an external resistance box ad a voltage test device are connected. The test device can be used for researching the influence of existence of a disturbed flow object on energy collected by the piezoelectric energy collector in a specific waterflow velocity, the voltage generated by the piezoelectric energy collector based on wake flow interference in different flow velocities, different loads and differentcenter distances can be measured, and reference suggestions can be provided for research of piezoelectric energy collection in the hydraulic power aspect.