SU152115A1 - Calibration stand - Google Patents

Description

Known calibration stands for measuring instruments, for example: an aerodynamic balance, contain loads suspended on flexible threads thrown over the calibration rollers.

In the proposed calibration stand, an increase in the accuracy of force measurements is achieved by the thread connected to the calibrated device, strings of the suspension thread of equal loads, the suspension points of which are fixed on the horizontal rod, elastically connected to the base of the plane and mixed in the axial direction by the difference of loads on platforms.

The drawing shows a schematic diagram of the calibration stand.

The stand contains a rigid frame / fixed on a flat platform 2 on which the scales B. are mounted. On the upper part of the frame two flat springs 3 are fixed. The springs are interconnected between themselves by a rigid rod 4, at each end of which are attached flexible cables 5 with platforms 6 for loading. The cables 5 are thrown over the calibration rollers 7. Equal weights are suspended to the rod in the plane of the X, Z axes of the coordinates of the weights x 8 9. The threads with weights are interconnected by a thin thread 10, coinciding with the X axis of the coordinates: weights. Threads 8 form the same angles with vertical. The thread W with its middle part is fastened with the calibrated device 11 mounted on the holder of the studied scales. If the loads 6 and 12 are placed on the platforms 6, the spring 3 will be bent under the action of the difference of these loads, and the rod 4 will move parallel to the axis by the amount of deflection of the springs 3 to the right. Amount of components

The forces applied to the platforms 6 can be obtained by measuring the movement of the rod 4 from the difference in loads J2 and 13 with a conventional hour indicator .:

Subject invention

A calibration stand for measuring instruments, such as an aerodynamic balance, contains weights placed on flexible threads thrown over the calibration rollers, characterized in that, in order to improve the accuracy of force measurement, the threads connected to the calibrated device are equal to loads, the suspension points of which are fixed on the horizontal shtanga, elastically connected with the base of the stand and axially displaced difference loads on the platforms.

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