SU739412A1

SU739412A1 - Induction anemometer

Info

Publication number: SU739412A1
Application number: SU782635489A
Authority: SU
Inventors: Дмитрий Константинович Мухин; Алексей Алексеевич Бубеничек; Александр Александрович Сорокин; Виктор Антонович Писарев
Original assignee: Специальное Конструкторское Бюро Гидрометеорологического Приборостроения
Priority date: 1978-06-28
Filing date: 1978-06-28
Publication date: 1980-06-05

Description

II

Изобретение относитс к приборостроению и может быть использовано дл измерени скорости воздушных потоков.The invention relates to instrument engineering and can be used to measure the speed of air currents.

Известны анемометры, содержащие корпус , чувствительный элемент в виде крыльчатки , дросселирующие решетки, расположенные с обеих сторон крыльчатки, и счетчик 1.Known anemometers, comprising a housing, a sensitive element in the form of an impeller, throttling grids located on both sides of the impeller, and a counter 1.

Недостатком этих устройств вл етс отсутствие электрического выхода и дистанционности измерений скорости потоков.The disadvantage of these devices is the lack of an electrical output and the distance measurement of the flow velocity.

Ближайшим к изобретению по технической сущности вл етс индукционный анемометр , содержащий ветроприемник, магнитоиндукционную систему с посто нными магнитами и цилиндрическим магнитопроводом, показывающий прибор и выпр митель 2. Недостатком этого устройства вл етс отсутствие дистанционности измерени скорости воздущного потока.The closest to the invention to the technical essence is an induction anemometer containing a wind receiver, a magnetic induction system with permanent magnets and a cylindrical magnetic core, showing the device and the rectifier 2. The disadvantage of this device is the lack of remoteness of measuring air velocity.

Целью изобретени вл етс обеспечение дистанционности измерени скорости воздущного потока при отсутствии внещних источников питани .The aim of the invention is to provide remote sensing of the air flow rate in the absence of external power sources.

Поставленна цель достигаетс тем, что в устройство введены цилиндрический подвижный экран, снабженный двум парамиThe goal is achieved by inserting a cylindrical movable screen into the device, equipped with two pairs

отверстии, расположенных у полюсов посто нных магнитов, одна пара отверстий развернута относительно другой на 90°, и неподвижный цилиндрический экран с двум парами отверстий, при этом внутри неподвижного экрана размещены два посто нных магнита, полюса которых развернуты на 180° друг относительно друга в плоскости , перпендикул рной продольной оси неподвижного экрана, а подвижный экран св зан с ветроприемником и размещен внутри магнитопровода, выполненного из материала с пр моугольной петлей гистерезиса.a hole located at the poles of the permanent magnets, one pair of holes is rotated relative to the other by 90 °, and a fixed cylindrical screen with two pairs of holes, while inside the fixed screen there are two permanent magnets whose poles are rotated 180 ° relative to each other in the plane perpendicular to the longitudinal axis of the fixed screen, and the movable screen is connected with the wind receiver and is placed inside a magnetic core made of a material with a rectangular hysteresis loop.

На чертеже приведен индукционный анемометр в разрезе.The drawing shows the induction anemometer in the section.

Claims

The induction anemometer consists of a wind receiver (spinner) 1, a movable ferromagnetic cylindrical screen 2, by means of a shaft 3 rigidly connected to the wind receiver 1, a magnetic circuit 4 made of a material with a rectangular hysteresis loop, fixed magnets 5, 6 brackets 7 rigidly connected to the shaft 3 and the screen 2, a stationary ferromagnetic screen 8 having openings 9 and 10 located opposite each other and opposite the poles of the permanent magnet 5 and openings 11 and 12 located opposite each other on the movable screen 2 at the level of the poles of the permanent magnet 5, the holes 13 and 14, deployed relative to the holes 11 and 12 at 90 ° and located on the movable screen 2 at the level of the poles of the fixed magnet b, the holes 15 and 16 located on the fixed screen opposite the poles of the permanent magnet 6. The poles of the same magnet of the permanent magnets 5 and 6 are rotated 180 ° relative to each other. A fixed screen 8 is mounted on the housing 17 by means of a link 18. A movable screen 2 is connected by a link 19 in a bearing 20. A winding 21 is connected to a magnetic core 4 made of metal with a rectangular hysteresis loop, connected through a full-wave rectifier 22 with a indicating device 23. The anemometer works as follows. Wind receiver 1 rotates a movable ferromagnetic screen 2. When rotating on the magnetic circuit 4, the magnetic fluxes of permanent magnets 5 and 6 alternately close the magnetic flux of permanent emitter 5 to magnetic circuit 4 through apertures 9-12, and the magnetic flux of permanent magnet 6 - when combining holes 13-16. When combining the holes of movable 2 and fixed 8 screens, the magnetic flux of permanent magnets 5 and 6 reversal the magnetic circuit 4 from one state of residual magnetic induction into another (with the opposite sign), since the permanent magnets 5 and 6 are turned by their poles relative to each other on 180 °. At. The change in the magnetic flux in the magnetic core 4 in the winding 21 is induced by an emf that is directly proportional to the rate of change of the magnetic flux (and the number of turns of the winding 21), and since the change in the magnetic flux is a result of the effect of the wind speed, then 21, depends on wind speed. The resulting EMF is rectified by a full-wave rectifier 22 and fed to a indicating device 23. Claims of the invention Induction anemometer containing a Wind Receiver, a permanent-magnet magnetic induction system and a cylindrical magnetic circuit, and an indicator and rectifier, characterized in that, in order to provide distance measurement air flow velocity in the absence of external power sources, a cylindrical movable screen is inserted into it, equipped with two pairs of holes located at the poles of One pair of holes is rotated relative to 90 °, and a fixed cylindrical screen with two pairs of holes, two permanent magnets are placed inside the fixed screen, the poles of which are rotated 180 relative to each other in a plane perpendicular to the longitudinal axis of the fixed screen, A movable screen is connected to a wind receiver and placed inside a magnetic core made of a material with a rectangular hysteresis loop. Sources of information taken into account during the examination 1. USSR author's certificate No. 365648, cl. G 01 P 5/06, 1973.

2. USSR author's certificate number 160914, cl. G 01 P 5/06, 1961 (prototype).

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