摘要:
A miniature pressure scanning system includes a plurality of miniature pressure sensors where each pressure sensors includes at least one sensor output for providing an analog output signal indicative of a detected pressure on a body, and each pressure sensor output has an associated output impedance; a plurality of buffers, each buffer electrically connected to the output port of a corresponding one of the pressure sensors, and configured to reduce the associated output impedance of the corresponding sensor output coupled thereto, and further configured to provide at an output of the buffer the analog output pressure signal from the pressure sensor; and a multiplexer coupled downstream of the plurality of buffers and configured to multiplex the buffered analog output pressure signals to output a multiplexed analog signal representing the detected pressures.
摘要:
A miniature pressure scanning system includes a plurality of miniature pressure sensors where each pressure sensors includes at least one sensor output for providing an analog output signal indicative of a detected pressure on a body, and each pressure sensor output has an associated output impedance; a plurality of buffers, each buffer electrically connected to the output port of a corresponding one of the pressure sensors, and configured to reduce the associated output impedance of the corresponding sensor output coupled thereto, and further configured to provide at an output of the buffer the analog output pressure signal from the pressure sensor; and a multiplexer coupled downstream of the plurality of buffers and configured to multiplex the buffered analog output pressure signals to output a multiplexed analog signal representing the detected pressures.
摘要:
An aerodynamic pressure sensing system for an such as an airplane lifting surface, rotor blade etc. is disclosed wherein a plurality of pressure probes (7) are arranged on the upper and lower surfaces of the airfoil-shaped body (1) to sense aerodynamic pressure at discrete locations thereof, wherein the pressure sensitive elements (7) are arranged to form a plurality of rows (8) on said upper and lower surfaces. According to the invention between 55-75% of the total number of the pressure sensitive elements (7) are arranged at the leading edge section, and the remaining pressure sensitive elements are arranged at the intermediate section of the airfoil-shaped body. The invention allows measuring aerodynamic forces generated at the leading edge of the airfoil and particularly the suction peak more precisely and with a reduced number of pressure probes.
摘要:
A method and apparatus for generating a flow of heated air (124) in an airfoil model of an inlet (104) of an aircraft (108) engine. Heated air (124) is sent into a duct system associated with the airfoil model (110) of the inlet (104) of the aircraft (108) engine. The heated air (124) is circulated within the airfoil model (110) of the inlet (104) of the aircraft (108) engine using the duct system in a manner that simulates air flowing in the inlet (104) of the aircraft (108) engine.
摘要:
Diese Vorrichtung dient zur Überprüfung von Luftgeräuschen eines Kraftfahrzeugs, insbesondere eines Personenkraftwagens, welche Luftgeräusche durch Anströmen von Luft auf eine Außenhaut eines Aufbaus des Personenkraftwagens entstehen. Um diese Vorrichtung zu optimieren, werden an dem unbewegten Personenkraftwagen in Bereichen, wo Dichtungen zwischen feststehenden Aufbaustrukturen und beweglichen Aufbauelementen des Aufbaus verlaufen, gezielte Luftströmungen mittels eines Gebläses aufgebracht, und die durch die Luftströmungen auftretenden Luftgeräusche werden subjektiv und/oder objektiv gemessen. Dabei ist ein einen Ausströmquerschnitt umfassende Gebläse Bestandteil der Vorrichtung, die mit einer Blasdüse zur Beaufschlagung von Messpunkten an der Außenhaut versehen ist.