SU957000A1

SU957000A1 - Accelerometer

Info

Publication number: SU957000A1
Application number: SU813229756A
Authority: SU
Inventors: Михаил Яковлевич Перельман; Юрий Георгиевич Ухов; Михаил Залманович Фридман
Priority date: 1981-01-06
Filing date: 1981-01-06
Publication date: 1982-09-07

Description

1one

Изобретение относитс к виброизмерительной технике и может быть использовано дл измерени ускорени вибраций.The invention relates to a vibration measuring technique and can be used to measure the acceleration of vibrations.

Известен акселерометр, содержащий регулируемый источник магнитного потока, сферический инерционный элемент из ферро- 5 магнитного материала и периодически взаимодействующие с последним диамагнитные контакты 1.The accelerometer is known, which contains an adjustable source of magnetic flux, a spherical inertial element made of a ferro-magnetic material and diamagnetic contacts 1 periodically interacting with the latter.

Недостатком акселерометра вл етс то, что он не обеспечивает измерение ускорений, ,р величина которых меньше Ig, где g - ускорение свободного падени .The disadvantage of the accelerometer is that it does not measure accelerations, p with a magnitude less than Ig, where g is the acceleration of free fall.

Цель изобретени - расширение диапазона измер емых ускорений.The purpose of the invention is to expand the range of measured accelerations.

Поставленна цель достигаетс тем, что акселерометр, содержащий регулируемый 15 источник магнитного потока, сферический инерционный элемент из ферромагнитного материала и периодически взаимодействующие с последним диамагнитные контакты, снабжен соосным первому вторым регули- о руемым источником магнитного потока, а диамагнитные контакты размещены в одной плоскости между источниками магнитного потока и замыкаютс посредством инерционного элемента.The goal is achieved by the fact that an accelerometer containing an adjustable 15 source of magnetic flux, a spherical inertial element made of a ferromagnetic material and periodically interacting with the latter diamagnetic contacts, is equipped with a coaxial first second controlled source of magnetic flux, and the diamagnetic contacts are located in one plane between the sources magnetic flux and are closed by an inertial element.

На чертеже представлена схема акселерометра .The drawing shows the scheme of the accelerometer.

Акселерометр содержит регулируемые источники магнитного потока, состо щие из электрических обмоток 1 и 2, в цепь питани которых включены регулировочные сопротивлени 3 и 4 и регистрирующие приборы 5 и 6, например амперметры, сферический инерционный элемент 7 из ферромагнитного материала и периодически взаимодействующие с последним диамагнитные контакты 8 и 9. Последние через индикатор 10 с малым собственным временем срабатывани подключены к источнику питани . Сферический инерционный элемент 7, диамагнитные контакты 8 и 9 и электрические обмотки 1 и 2 установлены в корпус (не показан) из диамагнитного матер,иала.The accelerometer contains adjustable magnetic flux sources consisting of electrical windings 1 and 2, the control circuit of which includes adjustment resistances 3 and 4 and recording devices 5 and 6, such as ammeters, spherical inertial element 7 made of ferromagnetic material and periodically interacting with the latter diamagnetic contacts 8 and 9. The latter, via indicator 10, with a short proper response time, are connected to a power source. The spherical inertial element 7, the diamagnetic contacts 8 and 9 and the electric windings 1 and 2 are installed in a housing (not shown) of the diamagnetic material, the shaft.

Акселерометр работает следующим образом .The accelerometer works as follows.

Claims

Before starting the measurement of the vibration acceleration, the accelerometer is calibrated using the following technology. A housing made of a diamagnetic material in which a spherical inertia element 7 is installed, diamagnetic contacts 8 and 9, and electrical windings 1 and 2 are rigidly fixed on the table of a vibrating stand next to the reference accelerometer. Vibrations are created at a single fixed frequency, but with different levels of vibration acceleration. At each level of vibration acceleration, the current is recorded in recording devices 5 and 6 or the position of the slider of adjusting resistances 3 and 4, at which the indicator circuit is turned off (indicator 10 is triggered), and the level of vibration acceleration measured by the reference accelerometer. In accordance with the obtained dependence of the current in the circuit of the electric windings and the 2 or position of the slider adjusting resistances 3 and 4 on the magnitude of the vibration acceleration, the scales of the recording devices 5 and 6 or the position of the slider adjustment resistance 3 and 4 are calibrated in units of vibration acceleration. After graduation, the accelerometer is mounted on a vibrating object. When electric windings 1 and 2 are not turned on, the indicator 10 signals determine whether acceleration exceeds the value of acceleration of free fall g if inertial element 7 opens diamagnetic contacts 8 and 9, then lower electric winding 2 is required to create a force that attracts inertial element 7 down; if not, the inertial element 7 does not open the diamagnetic contacts 8 and 9, and the turning of the upper winding of the electric winding I is required. After that, one of the electric windings, 1 and 2 is turned on and, smoothly changing the current value in it, the corresponding adjusting resistances 3 and 4, according to the pre-calibrated registering devices 5 and 6, the acceleration is determined, at which the inertial element 7 begins to open the diamagnetic contacts 8 and 9. The moment of opening of the diamagnetic ends 8 and 9 is fixed by the indicator 10. Use As an accelerometer, it allows the range of measured accelerations to be lashed out due to the fact that it is equipped with a coaxial first second adjustable source of magnetic flux, whereby the electro-magnetic force created by its electric winding neutralizes the force of the weight of the inertial element and the separation from the diamagnetic contacts occurs accelerations lower than Ig. Claims of the invention An accelerometer comprising an adjustable magnetic flux source, a spherical inertial element made of ferromagnetic material and periodically interacting diamagnetic contacts, characterized in that, in order to spread the range of measured accelerations, it is equipped with a coaxial first second adjustable magnetic flux source. and the diamagnetic contacts are located in the same plane between the magnetic flux source and are closed by means of an inertial element. Sources of information taken into account during the examination 1. French Patent No. 2123490, cl. H 01 H 35/00, 1972 (prototype).

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