SU697803A1

SU697803A1 - Device for measuring deformations on rotating articles

Info

Publication number: SU697803A1
Application number: SU782594322A
Authority: SU
Inventors: Александр Федорович Прокунцев; Геннадий Иванович Шаронов; Елена Семеновна Максимова
Original assignee: Пензенский Завод-Втуз При Заводе Вэм Филиал Пензенского Политехнического Института
Priority date: 1978-03-27
Filing date: 1978-03-27
Publication date: 1979-11-15

Description

II

Изобретение относитс к области измерени неэлектрических величин электрическими методами и может быть использовано дл измерени деформации вращающихс деталей.The invention relates to the field of measuring non-electrical quantities by electrical methods and can be used to measure the deformation of rotating parts.

Известно устройство дл измерени деформлции вращающихс элементов мащин, содержащее датчики, установленные на исследуемых част х мащин, и электронную схему дл измерени деформации 1.A device for measuring the deformation of rotating elements of a machine, containing sensors mounted on the studied parts of the machine and an electronic circuit for measuring deformation 1, is known.

Известно также устройство дл измерени деформации на вращающихс детал х, содержащее тензомост, согласующий блок и генератор, включенный в диагональ питани тензомоста, фазоврем енной преобразователь , к входу которого через согласующий блок подключена измерительна диагональ тензомоста, и регистратор 2.It is also known a device for measuring the deformation on rotating parts, containing a strain gauge, matching unit and generator included in the diagonal of the strain gauge bridge, phase shifting transducer, to the input of which a measuring strain gauge diagonal is connected through the matching block and the recorder 2.

Недостатком известных устройств вл етс низка точность измерени из-за вли ни изменени реактивности токосъема.A disadvantage of the known devices is the low measurement accuracy due to the effect of changes in the reactivity of the current collection.

Целью изобретени вл етс повыщение точности измерений.The aim of the invention is to increase the measurement accuracy.

Цель достигаетс за счет того, что устройство снабжено последовательно соединепны .ми амплитудным преооразовате ем и ключом, вершины диагонали питани тензомоста подключены к второму и третьему входа.м ф азов ременного преобразовател , выход которого подключен к управл ющему входу ключа, подключенного к регистратору, а выход согласующего блока иодключен к входу амплитудного преобразовател .The goal is achieved due to the fact that the device is equipped with a series-connected amplitude preamplification and a key, the tops of the diagonal of the supply of the strain-gauge bridge are connected to the second and third inputs of the belt converter, the output of which is connected to the control input of the key connected to the recorder, output of the matching unit and connected to the input of the amplitude converter.

На чертеже представлена блок-схема устройства.The drawing shows the block diagram of the device.

Claims

The device contains a strain gauge, made from strain gauge 1, exemplary resistors 2, 3, 4, intuitiveness 4 and capacitance 5 of current collector, generator 6, included in diagonal 1I1 tann tensome bridge, phase-change converter 7, to the first input of which through matching unit 8 connects 1, and measuring diagonal strain gauge , and to the second and third inputs - diagonal feed. The output of unit 8 is connected to a series-connected amplitude converter 9, a key 10 and a recorder P. The output of the phase-time converter 7 is connected to the control input of the key 10. The device operates as follows. Voltage with I31meritelnoy diagonal tenzomosta fed through a matching unit 8 to the input of the amplitude of the transducer 9 and the first input fazovremennogo converter 7. The second and third inputs fazovremennogo converter 7 is supplied with voltage diagonally power tenzomosta, At the instant when the voltage at the diagonal tenzomosta are in phase or anti-phase, the phase-to-phase converter 7 will generate a signal that is fed to the control input of the key 10 and opens it. During this pulse, the voltage level from the output of the amplitude converter -9, proportional to the change in resistance of the strain gauge 1 and independent of the change in the reactivity of the current collector, is recorded in the recorder 11. Thus, the introduction of an amplitude converter 9 and a key 10 into the device allowed us to extract absolute information change the magnitude of the resistance of the strain gauge 1, regardless of changes in the reactivity of the current collection and thereby improve the accuracy of measurement of deformation. Claim device A device for measuring the deformation on rotating parts, containing a strain gauge, matching unit and generator included in the diagonal of the strain gauge power supply, phase-time converter, to the input of which a measuring strain gauge diagonal is connected to the input, which is different in that measurement accuracy, it is supplied with series-connected amplitude transducer and key; the diagonal angles of the supply of the strain gauge are connected to the second and third inputs by the phasor The transducer is connected to the control input of a key connected to the recorder, and the output of the matching unit is connected to the input of the amplitude transducer. Sources of information taken into account in the examination 1. Express-information VINITI, series “Measuring and measuring equipment, № 7, p. 31 -32, 1976.

2..Avtorskoe certificate of the USSR № 492722, cl. G 01 B 7/16, 1974 (prototype).