SU978049A1

SU978049A1 - Acceleration pickup

Info

Publication number: SU978049A1
Application number: SU792815969A
Authority: SU
Inventors: Вячеслав Федорович Хлебников
Original assignee: За витель
Priority date: 1979-09-17
Filing date: 1979-09-17
Publication date: 1982-11-30

Description

Изобретение относится к приборостроению и может быть использовано для измерения ускорения движения различных объектов'.The invention relates to instrumentation and can be used to measure the acceleration of various objects'.

Известен акселерометр, содержащий вращающуюся, частично заполненную жидкостью камеру, привод вращения камеры, регулятор скорости вращения и фотоэлектрический датчик положения поверхности жидкости, подключенный к входу регулятора, снабженный расположенным внутри камеры перпендикулярно ее оси вращения и обращенным в сторону жидкости зеркалом, а поверхность камеры расположена на пути луча датчика (1).Known accelerometer containing a rotating, partially filled with a fluid chamber, a rotational drive of the chamber, a rotational speed controller and a photoelectric sensor of the liquid surface position, connected to the input of the regulator, equipped with a mirror located inside the chamber perpendicular to its rotation axis and the camera surface is located on sensor beam paths (1).

Недостатке»* акселерометра являет|СЯ сложность конструкции.The disadvantage of the accelerometer * is the complexity of the design.

Наиболее близким по технической 20 сущности и достигаемому результату к предлагаемому является датчик ускорения, содержащий сосуд, заполненный жидкостью и сообщающийся с капилляром [2] ... 25The closest in technical essence and achieved result to the proposed one is an acceleration sensor containing a vessel filled with liquid and communicating with a capillary [2] ... 25

Недостатками известного датчика ускорения являются невысокая точность. Обусловленная используемым съемом сигнала, а также сложность конструкции из-за использования мембраны с закреп-__ ленным в ее средней части грузом*The disadvantages of the known acceleration sensor are low accuracy. Due to the used signal pick-up, as well as the complexity of the design due to the use of a membrane with a load fixed in its middle part *

Цель изобретения - повышение точ·» ности и упрощение конструкции.The purpose of the invention is to increase the accuracy · "and simplify the design.

Поставленная цель достигается тем; что в датчике ускорения, содержащем сосуд, заполненный жидкостью и сообщающийся с капилляром, внутренняя поверхность капилляра покрыта электропроводным материалом и снабжена электродами, расположенными у нижнего и верхнего торцов капилляра, а в крышке сосуда, заполненного электропроводной жидкостью, выполнены отверстия.The goal is achieved by; that in the acceleration sensor containing a vessel filled with liquid and communicating with the capillary, the inner surface of the capillary is covered with electrically conductive material and provided with electrodes located at the lower and upper ends of the capillary, and holes are made in the lid of the vessel filled with electrically conductive liquid.

На чертеже представлен датчик ускорения.The drawing shows an acceleration sensor.

Датчик ускорения состоит из широкого сосуда 1, заполненного электропроводной жидкостью 2 (например ртутью), капиллярной трубки 3, внутренняя поверхность которой покрыта электро про-»’ водным материалом 4 (например угольным порошком). У верхнего и нижнего торцов капилляра установлены электроды 5 и 6. В крышке сосуда выполнены отверстия 7, сообщающие сосуд с атмосферой.The acceleration sensor consists of a wide vessel 1 filled with an electrically conductive liquid 2 (for example, mercury), a capillary tube 3, the inner surface of which is covered with an electro-water material 4 (for example, coal powder). Electrodes 5 and 6 are installed at the upper and lower ends of the capillary. Holes 7 are made in the lid of the vessel, communicating the vessel with the atmosphere.

Устройство работает следующим образом.The device operates as follows.

Известно, что уровень жидкости в капиллярном канале, связанном с широким сосудом, ниже'(для случаев несма3 чиваемой жидкости) уровня жидкости в широком сосуде на величину, определяемую формулой с _ 2бсо5б .It is known that the liquid level in the capillary channel associated with a wide vessel is lower than (for cases of non-wettable liquid) the liquid level in a wide vessel by an amount determined by the formula with _ 2bso5b.

^по* rptf где S' - коэффициент поверхностного натяжения; ⁿ o * rptf where S 'is the coefficient of surface tension;

г - радиус капилляра;g is the radius of the capillary;

ц, - ускорение силы тяжести;C, - acceleration of gravity;

р - плотность жидкости;p is the density of the liquid;

Θ - краевой угол.Θ is the edge angle.

.Если разместить широкий сосуд с капиллярным каналом на движущийся объект с ускорением а, тогда . _ 2 <3 cos Θ ° ” rp(<j-+ d) <э cos θ ^r? *0.If you place a wide vessel with a capillary channel on a moving object with acceleration a, then. _ 2 <3 cos Θ ° ”rp (<j- + d) <е cos θ ^r ? * 0

06ti4rfo r,. p , Θ - величины постоян. ные для каждого конкретного случая.06ti4rfo r ,. p, Θ are constant values. ny for each specific case.

Таким образом, ускорение объекта'Thus, the acceleration of the object '

О-= f(h^)H изменение высоты ^характеризуют динамику измерения ускорения движения. Изменение сопротивления внутреннего несмачиваемого электропроводной жидкостью покрытия про15 порционально изменению ускорения движущегося объекта.О- = f (h ^) H change in height ^ characterize the dynamics of measuring the acceleration of motion. The change in the resistance of the internal non-wettable electroconductive fluid coating is proportional to the change in the acceleration of a moving object.

Предлагаемый датчик ускорения прост по конструкции и позволяет измерять ускорения с достаточной точностью.The proposed acceleration sensor is simple in design and allows you to measure acceleration with sufficient accuracy.

Claims

The invention relates to (device construction) and can be used to measure the acceleration of various objects. A gisselerometer is known to contain a rotating, partially filled liquid, a camera rotational drive, a rotational speed controller and a photoelectric sensor for the surface of a liquid connected to the regulator input, fitted with located inside the chamber perpendicular to its axis of rotation and facing the liquid mirror, and the surface of the chamber is located on the path of the sensor’s beam {ll The x-meter is 1 time construction complexity. The closest to the technical essence and the achieved result is the acceleration sensor, which contains a vessel filled with liquid and communicating with capillary 2. The disadvantages of the known acceleration sensor are low accuracy due to signal removal, as well as complexity constructions due to the use of a membrane with a cargo fixed in its middle part. The purpose of the invention is to improve the accuracy and simplify the design. The goal is achieved by the fact that in the acceleration sensor containing a vessel filled with liquid and connected to the capillary, the inner surface of the capillary is covered with an electrically conductive material and provided with electrodes located at the lower and upper ends of the capillary, and in the lid of the vessel filled with electrically conducting liquid holes. The drawing shows an acceleration sensor. The acceleration sensor consists of a wide vessel 1 filled with an electrically conductive liquid 2 (for example, mercury), a capillary tube 3, the inner surface of which is covered with electro-. water material 4 (for example coal powder). At the upper and lower ends of the capillary, electrodes 5 and 6 are installed. Holes 7 are made in the vessel lid, which connect the vessel with the atmosphere. The device works as follows. It is known that the level of liquid in the capillary channel associated with a wide vessel is lower (for cases of non-wetting liquid) the level of the wide vessel liquid by an amount defined by the formula A, .2 (0059, o-rpqr where G is the surface tension coefficient ; d is the radius of the capillary; c, is the acceleration of the force of gravity; p is the density of the liquid; c is the contact angle. If you place a wide vessel with a capillary channel on a moving object with acceleration a, then 2 d cos 9 rp j- + ci) 1 ё cos in Ordrr ,, р / 0 - values of constant n. Thus, the acceleration of the object CL (b |;,) and the change in height b characterize the dynamics of the measurement of the acceleration of motion. The change in the resistance of the internal nonwettable electrically conducting coating fluid. / - V is proportional to the change in acceleration of a moving object. The proposed acceleration sensor is simple in design and allows accelerations to be measured with sufficient accuracy. Claims of the Invention An acceleration sensor comprising a vessel filled with a liquid and connected to a capillary, characterized in that, in order to improve the accuracy and simplify the design, the inner surface of the capillary is covered with an electrically conductive material and provided with electrodes located at the lower and upper ends of the capillary, and in the lid of the vessel, filled with an electrically conductive liquid, holes are made. Sources of information taken into account in the examination 1. The author's certificate of the USSR 446833, cl. G 01 R 15/08, 1973.

2. Authors certificate of the USSR 50442, cl. G 01 R 15/02, 1937 (prototype).