SU994987A1

SU994987A1 - Variable reluctance pickup of motion speed

Info

Publication number: SU994987A1
Application number: SU813332585A
Authority: SU
Inventors: Игорь Вадимович Сальников
Original assignee: Куйбышевский институт инженеров железнодорожного транспорта
Priority date: 1981-08-19
Filing date: 1981-08-19
Publication date: 1983-02-07

Description

(54) ИНДУКЦИОННЫЙ ДАТЧИК СКОРОСТИ ДВИЖЕНИЯ(54) INDUCTION MOTION SPEED SENSOR

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Изобретение относитс к приборостроению и может быть использовано при бесконтактном измерении вектора абсолютной или относительной скорости перемещени подвижных частей машин и приборов.The invention relates to instrument engineering and can be used in contactless measurement of the absolute or relative velocity vector of moving parts of machines and devices.

Известны бесконтактные индукционные датчики скорости движени , содержащие посто нный магнит, магнитопровод с обмоткой и короткозамкиутый виток (экран), перемещающийс относительно магнита и магнитопровода 1.Contactless induction speed sensors are known, which contain a permanent magnet, a magnetic circuit with a winding, and a short-circuited turn (screen) moving relative to the magnet and magnetic circuit 1.

Недостатком этих датчиков вл етс сложность конструкции и невозможность измерени с помощью одного датчика вектора скорости движени .The disadvantage of these sensors is the complexity of the design and the impossibility of measuring the velocity vector with a single sensor.

Наиболее близким техническим решением к предложенному вл етс индзтсционный датчик скорости движени , содержащий магнитопровод с обмоткой, смещенной относительно его среднего сечени , и второй магнитопровод с посто нным магнитом 2.The closest technical solution to the proposed is an inductance speed sensor comprising a magnetic core with a winding offset from its middle section, and a second magnetic core with a permanent magnet 2.

Недостатком известного датчика вл етс невозможность измерени с помощью одногоThe disadvantage of the known sensor is the impossibility of measurement using one

датчика вектора скорости движени , или двух ортогональных их компонент.a motion vector sensor, or two orthogonal components thereof.

Цель изобретени - одновременное измерение двух ортогональных компонент скорости.The purpose of the invention is the simultaneous measurement of two orthogonal velocity components.

Claims

The goal is achieved by the fact that a known sensor containing a magnetic core with a winding displaced relative to its middle section, and a second magnetic core with a permanent magnet, is provided with a second winding, both windings are wound orthogonally to the water quadrant of the first flat magnetic core parallel to its side face, and the second The magnetic circuit is made in the form of two orthogonal F-shaped rods connected together in the vertices of the long sides, and is located above the plane of the first magnetic core by the short sides to the plane spine and parallel to the long lateral edge of said first magnetic core, while those compounds in mes20 long sides rods mounted permanent magnet oriented with one pole to the first magnetic plane and located above the windings. 399 FIG. 1 schematically shows a sensor; in fig. 2 shows section A-A in FIG. 1. The sensor consists of a flat magnetic circuit 1 in which two independent orthogonal windings 3 and 4 are wound through the holes 2 and the corresponding terminals 5 and 6. The winding 3 is distributed from a to B along the Y axis and measures the Y component of the speed and the winding 4 is distributed 8 to t along the X axis and measures the X velocity component. A permanent magnet 7 is reinforced with a second magnetic core 8, which is connected to the object under study. For the concentration of the magnetic flux, the magnet 7 and its output outside the limits of the windings 3 and 4, the second magnetic conductor 8 is F-shaped. form. The magnetic flux of the magnet 7, passing through the windings and the gushast-shaped magnetic core, is closed through the outer edges of the F-shaped magnetic circuit outside the windings. The magnetic core is made of a magnet of a soft material. In general, depending on the specific measurement conditions, the distance a6 and 81 may be unequal, respectively, and the distance from the center to the ends of the F-shaped magnetic circuit. When the magnetic conductor 8 is moving, relative to the magnetic conductor 1, the central magnetic flux of the magnet 7 intersects the conductors located in the gap between the magnet and the plate-shaped magnetic conductor and induces an emf in them proportional to the component speed that is perpendicular to the turns of the coil, and full compensation of the emf will not occur Since the edge magnetic field lines of force are closed between the plate-shaped magnetic conductor and the L-shaped magnetic conductor outside the windings 3 and 4. At the output terminals 5 and 6, Voltage proportional to two orthogonal component velocity vectors. Claims An induction speed sensor comprising a magnetic core with a winding offset from its middle section and a second magnetic core with a permanent magnet, characterized in that, in order to simultaneously measure two orthogonal velocity components, it is provided with a second winding, both windings are ortholed one quadrant of the first flat magnetic circuit parallel to its side facets, and the second magnetic core is made in the form of two orthogonal F-shaped rods interconnected in the vertex The lengths of the long sides are located above the plane of the first magnetic circuit with the short sides to the plane and long parallel to the side faces of the first magnetic circuit. Sources of information taken into account during the examination 1. USSR author's certificate N 479032, cl. G 01 P 3/42, 1973.

2. USSR author's certificate number 366414, cl. G 01 P 3/42, 1970 (prototype).

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