摘要:
The invention proposes a method for monitoring a rotation of a compressor wheel (12), in particular a compressor wheel (12) of an exhaust gas turbocharger, and an apparatus (10) for carrying out the method. The method according to the invention provides for the compressor wheel (12) to have a number n of blades (14) on the circumference, wherein a sensor (16) is provided for the purpose of detecting at least one rotation property of the compressor wheel (12), especially the speed or rotational speed, wherein the sensor (16) is an inductive sensor (16), wherein the sensor (16) generates at least one output signal (20) on the basis of the eddy currents generated by being guided past the blades (14), wherein the rotation property, in particular the rotational speed, of the compressor wheel (12) is inferred from a fundamental frequency of the output signal (20), and wherein an item of information relating to a fault of the compressor wheel (12) can also be gathered from at least one modulation of the output signal (20), in particular amplitude modulation. An imbalance of the compressor wheel can be detected, in particular.
摘要:
The invention relates to a sensor device (10) for non-contact detection of at least one rotational property of a rotatable object (12), particularly for detecting a rotational speed of a compressor wheel (14) for a turbocharger (18). The sensor device (10) comprises at least one sensor housing (22). The sensor device (10) further comprises at least one magnetic field generator (26) for generating a magnetic field at the location of the rotatable object (12) and at least one magnetic field sensor (28) for detecting a magnetic field generated by eddy currents of the rotatable object (12). The sensor device (10) further comprises at least one temperature sensor (30). The magnetic field generator (26) and the magnetic field sensor (28) are arranged at least in part together in a sensor section (24) of the sensor housing (22). The temperature sensor (30) is arranged at least in part in the sensor section (24).
摘要:
A rotating electrical machine comprises a stator (2), a rotor (3) and at least one active magnetic bearing (21, 22, 31, 32, 33) comprising a bearing winding (21; 22) which is an air-gap winding and comprises at least a first phase winding (B) and a second phase winding (A). A measurement arrangement (4, 5, 6, 7) measures the radial displacement of the rotor (3) by injecting a displacement measurement injected signal into at least one section of at least one of the bearing windings (21; 22) of one of the magnetic bearings, and capturing at least one displacement measurement signal wherein this displacement measurement signal depends on the rotor displacement in radial direction relative to the stator, this dependency being due to eddy currents in the rotor induced by the displacement measurement injected signal.
摘要:
Es wird eine Sensorvorrichtung (110) zur Erfassung mindestens einer Rotationseigenschaft vorgeschlagen, insbesondere zur Drehzahlerfassung eines Verdichters (111) zum Verdichten fluider Medien. Die Sensorvorrichtung (110) weist mindestens ein erstes Element (132) und mindestens ein zweites Element (134) auf. Das erste Element (132) und das zweite Element (134) sind um eine Rotationsachse (136) relativ zueinander rotierbar. Das erste Element (132) und das zweite Element (134) sind gegeneinander entlang der Rotationsachse (136) versetzt angeordnet. Die Sensorvorrichtung (110) weist mindestens einen mit dem ersten Element (132) verbundenen Felderzeuger (120) auf, welcher eingerichtet ist, um an mindestens einem Ort des zweiten Elements (134) mindestens einen Wirbelstrom zu erzeugen. Das erste Element (132) umfasst weiterhin mindestens einen Feldsensor (122) zur Erfassung mindestens eines durch den Wirbelstrom erzeugten Feldes. Das zweite Element (134) ist eingerichtet, um das durch den Wirbelstrom erzeugte Feld in Abhängigkeit von einer Winkelstellung des zweiten Elements (134) relativ zum ersten Element (132) zu variieren.
摘要:
The invention concerns an encased measuring apparatus for detecting the position (travel or angular position) and acceleration (speed) of a part with rotary or linear movement. Said apparatus comprises a position measuring device (2, 3) arranged in a housing (1) of the encased measuring apparatus, parts of said device being connected to the measuring apparatus housing (1), and a probing unit including a probing head (5) of a rotating field sensor, while the eddy current body of the rotating field sensor consists of at least part of the wall (10) of the measuring apparatus housing (1).
摘要:
Die Erfindung betrifft ein Gebersystem (GS) für einen Ferraris-Bewegungsgeber, bei dem ein oder mehrere Magnetfelderzeuger (ME1-ME5) zusammen mit einem elektrisch leitenden Messkörper (MK) mindestens eine magnetische Messanordnung bilden, wobei Magnetfelderzeuger (ME1-ME5) und Messkörper (MK) in Betrieb eine Relativbewegung zueinander ausführen und wobei durch einen daran angekoppelten Magnetfeldsensor (S) geschwindigkeits- oder beschleunigungsabhängige Ausgangssignale generierbar sind. Dabei wird durch mindestens zwei in axialer Richtung ineinandergreifende, zum Messkörper (MK) konzentrisch angeordnete Magnetkörper (M3-M6) das Magnetfeld der sich im Betrieb ausbildenden Wirbelströme geführt. Des Weiteren ist es auch möglich, dass das Erzeugermagnetfeld mittels erregerseitigen Klauenpolen (EK31-EK61) geführt ist.
摘要:
The invention relates to a device for generating signals that are dependent on rotational acceleration. The aim of the invention is to eliminate interfering signal corruptions caused by interfering fields and by wobbling movements of a shaft to be monitored. To this end, the connecting element (5) of a rotor (4, 5), which is connected to the shaft (2), rotates in an air gap (6), which is delimited by an annular outer stator (7) and a inner stator (8) that is also annular. One of the stators (7, 8) is equipped with magnets (11, 12) that are arranged in pairs and with sensor coils (16, 17) that are also arranged in pairs.
摘要:
There is described a device for detecting the angular speed of a rotating member, comprising a disk (D) of an electrically conductive material, which is to be rotatably connected to a member whose angular speed must be measured, a permanent magnet (M) provided in a fixed position adjacent to disk (D), with its two polar expansions (E) located on opposite sides of disk (D), so as to generate within the rotating disk (D) an electromotive force dependent upon the angular speed of the disk (D), which on its turn gives raise to parasitic currents within the disk (CP), and means for measuring the magnetic field generated by said parasitic currents and for processing this measurement so as to provide an output signal indicative of the angular speed of the disk (D).
摘要:
Le tachymètre à impulsion pour mesurer la rotation d'un organe (A) tournant est caractérisé en ce qu'il comprend un capteur (10) inductif de proximité placé au voisinage de cet organe (A) pour engendrer une impulsion (100) électrique à chaque révolution de l'organe (A), un émetteur (20) connecté à ce capteur (10) pour recevoir cette impulsion (100) électrique, la mettre en forme et la convertir en un signal optique, une liaison (30) à fibre optique connectée à cet émetteur (20) et à un récepteur (40) pour recevoir ce signal optique de l'émetteur (20) et l'acheminer à ce récepteur (40) pour son exploitation afin de calculer la vitesse de l'organe tournant. Application aux machines tournantes par exemple turboalternateurs.