RU121954U1 - STAND FOR GRADING, CALIBRATION AND VERIFICATION OF TENSOMETRIC SENSORS - Google Patents

Abstract

A stand for graduation, calibration and verification of strain gauges, including a frame with a double-sided support prism, an equal-arm beam mounted on it with a balance bar and a balance indicator, a power screw with a groove near the head and shackles at the ends with platforms connected to them for installing reference weights, rigidly connected with a frame, a bracket, adjustable in height by racks, and a strain gauge mounting, providing a load on the sensors in the range from 0 to 2000 N, both in tension and compression.

Description

The utility model relates to methods and means for determining the characteristics of strain gauge sensors and can be used for calibration, calibration and calibration of strain gauges type SBA and MNC, subjected to a load of 0 to 2000 H, used in measuring instruments for testing equipment for agricultural and other equipment.

Currently, for the calibration, calibration and calibration of strain gauges used in measuring instruments for testing equipment for agricultural and other equipment, various constructive devices are used, information about which is not available in widely available sources.

The purpose of the utility model is to create a stand for calibration, calibration and verification of strain gauge force sensors acting both on tension and compression, subjected to a load from 0 to 2000 N.

To ensure this goal is proposed the design of a utility model, a diagram of which is shown in the drawing.

The drawing shows a stand for calibration, calibration and verification of strain gauges.

The proposed utility model consists of a bed 3, on which an equal-arm beam 1 is mounted, mounted on a double-sided support prism 8, with a balancer 6 and an equilibrium indicator 5, with earrings 7 and suspended platforms 2 for installing standard weights 12. There is a groove for the power beam at the end of the equal arms of beam 1 a screw with a groove near the head 10 (drawing 1, callout A), through which the tensile or compression force is transmitted to the strain gauge 11, fixed by a fastener 14 in an arm 4 rigidly connected to the bed 3, adjustable in height with 9 9. The strain gauge 11 is subjected to tensile force if the weights 12 are stacked on the platform 2 located below it, and to the compressive force if the weights are stacked on the opposite platform.

The process of calibration, calibration and verification of strain gauges on the stand is as follows.

Before starting work on the stand, according to the balance indicator 5, using the level and the balancer 6, the platforms 2 are balanced, attached by the earrings 7 to the ends of the equal arms of the beam 1, mounted on a double-sided support prism 8 mounted on the bed 3. The required height of the bracket 4 is adjusted by the posts 9, on which the strain gauge 11 is fastened by fastening 11. The power screw with a groove near the head 10 is screwed into the strain gauge 11 and installed by the groove in the groove provided in the equal-arm beam 1, excluding interactions strain gauge 11 with a surface equal-beams 1.

After the above operations, the process of balancing the stand is repeated.

Reference weights 12 are installed on the corresponding platform 2.

For a given load on the strain gauge sensor 11, using for two seconds, about 50 polling cycles of the analog-to-digital converter (ADC) of the electronic unit 13 are performed in the “Force Indication” mode. The maximum and average values of the force are determined, which are displayed on the display of the electronic unit of means 13, the strain gauge 11 of which is calibrated, calibrated and verified. The ADC polling cycles are repeated until a key is pressed, then the average value of the force value is displayed. Further on the display it is offered to apply the next load.

The measurement data can be viewed on the display screen of the electronic unit 13, the strain gauge 11 which is calibrated, calibrated and verified, and transferred to the memory of a personal computer for further processing.

The advantage of the proposed utility model is determined by the fact that the ability to calibrate, calibrate, and verify strain gauge sensors under load on the sensors in the range from 0 to 2000 H both in tension and in compression is ensured by the necessary set of structural elements, including a bed with a double-sided support prism, installed on it an equal-arm beam with a balancer and an equilibrium indicator, a power screw with a groove near the head and earrings at the ends with platforms connected to them for installing standard weights, a bracket rigidly connected to the bed, adjustable in height by uprights, and mounting strain gauge sensors.

Claims (1)

A stand for calibration, calibration and calibration of strain gauges, including a bed with a double-sided support prism, an equal-arm beam with a balancer and an equilibrium indicator, a power screw with a groove near the head and earrings at the ends with platforms for installing standard weights connected to them, rigidly connected with a bed bracket, height-adjustable uprights, and mounting strain gauge sensors, providing a load on the sensors in the range from 0 to 2000 H both in tension and compression.