SU651221A1

SU651221A1 - Apparatus for calibrating and testing force-measuring devices

Info

Publication number: SU651221A1
Application number: SU721863554A
Authority: SU
Inventors: Артемий Степанович Больших; Анатолий Антонович Титов; Виктор Львович Фонгауз
Original assignee: Научно-Исследовательский И Конструкторский Институт Испытательных Машин,Приборов И Средств Измерения Масс
Priority date: 1972-12-29
Filing date: 1972-12-29
Publication date: 1979-03-05

Description

Изобретение относитс к силоизмерительной технике и может быть использовано дл градуировки и поверки силоизмерителей.The invention relates to load measuring technique and can be used for the calibration and calibration of force-measuring instruments.

Известное устройство дл градуировки силоизмерителей, содержащее колеблющуюс массу, присоединенную к градуируемому динамометру через резонирующий упругий элемент, не обеспечивает требуемой точности градуировки 1.The known device for calibrating the force meters, containing an oscillating mass, attached to the calibrated dynamometer through a resonating elastic element, does not provide the required accuracy of the calibration 1.

Наиболее близким по технической сущности вл етс устройство дл градуировки и поверки силоизмерителей, содержащее станину, две инерционные массы, одна из которых выполнена в виде груза с п,патформой , резонирующий упругий элемент и возбудитель колебаний 2.The closest in technical essence is a device for calibration and verification of force meters, containing a stand, two inertial masses, one of which is made in the form of a load with n, patform, a resonant elastic element and a vibration exciter 2.

К недостаткам известного устройства относитс низка точность градуировки и поверки силоизмерителей.The disadvantages of the known device are low accuracy of calibration and calibration of load cells.

Цель изобретени - повышение точности градуировани и поверки.The purpose of the invention is to improve the accuracy of calibration and verification.

Эта цель достигаетс за счет того, что в него введен динамометр, инерционные массы выполнены различными по величине и свободно подвещены К станине, причем меньща по величине инерционна масса соединена с одной стороны с резонирующим упругим элементом, а с другой - с возбудителем колебаний через динамометр, и выполнена в виде основани с укрепленными на нем сменными грузами.This goal is achieved due to the fact that a dynamometer is inserted into it, the inertial masses are made different in size and freely inserted into the bed, and the smaller inertial mass is connected on the one hand to the resonant elastic element, and on the other to the oscillator through a dynamometer, and made in the form of a base with removable cargoes fixed on it.

На чертеже изображено предлагаемое устройство.The drawing shows the proposed device.

Станина 1 установки покоитс на упругих опорах 2, выполненных, например, в виде пружин. На станине смонтирован возбудитель 3 колебаний, который через динамометр 4 соединен с маЛой массой 5. Эта масса подвещена к станине на подвесах б, выполненных , например, в виде струн. Мала масса 5 выполнена в виде основани 7, к которому ПЛОТНО креп т на разъемных, например болтовых, соединени х сменные грузы 8.The installation bed 1 is resting on elastic supports 2, made, for example, in the form of springs. On the frame is mounted the exciter of 3 oscillations, which through a dynamometer 4 is connected to a low mass of 5. This mass is connected to the frame on the suspensions of b, made, for example, in the form of strings. The low mass 5 is made in the form of a base 7, to which TIGHTLY fastened on detachable, for example bolted, joints interchangeable loads 8.

Claims

The low mass 5 is connected by a resonating elastic element 9 to a gripping device 10 of a graduated or calibrated dynamo 11 meter, which is attached to the greater mass 12 as a load 13 with a platform 14 by its base. This mass is connected to the frame on the suspension made similar to suspensions 6. The resonating elastic element is made replaceable with different stiffness. The vibration sensor 15 and the power amplifier 16 form an electrical feedback circuit. A frequency meter 17 is connected to the amplifier 16. The device is an electromechanical oscillatory system operating in a self-oscillation mode, which is maintained by applying energy to the driver of the oscillations 3 from the power amplifier. 16. The predetermined frequency, oscillation is established by selecting the resonating element 9 with the necessary my rigidity and low mass 5 of the required size. With the required accuracy, the oscillation frequency is measured by a frequency meter 17. The force supplied from the vibration exciter 3 is measured by a dynamometer 4. The relative amplitude of the oscillations. Iacc is measured, for example, by optical means. By making a measurement of the frequency and amplitude of oscillations, as well as the force applied to the oscillatory system, and knowing the magnitude of the masses, the value of the variable force applied to the calibrated or calibrated dynamometer is calculated analytically. The invention The device for calibration and calibration of force meters, containing a frame, two inertial masses, one of which is made in the form of cargo with a platform, a resonating elastic element and a vibration agent, characterized in that, in order to improve the accuracy of calibration and calibration, a dynamometer is introduced into it , the inertial masses are made different in size and are freely connected to the bed, with the smaller inertial mass connected on the one hand with the resonating elastic element, and on the other with the pathogen oscillations through a dynamometer, and made in the form of a base with interchangeable loads fixed on it. Sources of information taken into account during the examination 1. USSR author's certificate No. 139852, cl. G 01 L 25/00, 1954.

2. USSR author's certificate number 315069, cl. G 01 L 25/00, 1969.