RU1789878C - Method of measurement of mass of weight - Google Patents

Abstract

Usage: instrumentation, in the force and weight measuring equipment. SUMMARY OF THE INVENTION: in the process of loading the balance with measured mass in the process vessel (8), the load on the dynamometer (7) is maintained equal to the largest measurement limit, and the load from the force-loading device (6) is completely removed during the measurement of mass. 1 ill.

Description

The invention relates to power and weight measuring equipment and can be used to create weight measuring devices of high accuracy,

A known method for determining the mass of a load, including pre-loading the dynamometer with a load equal to the largest measurement limit, loading the balance with a weighed mass, at the end of which the mass is determined.

The purpose of the invention is to improve the accuracy of weighing slowly varying masses.

For this, in a method of measuring the mass of a load, including preloading the dynamometer with a load using a force-loading device equal to the largest measurement limit, loading the scales with a weighed mass, changing the load on the dynamometer from the load-loading device, and measuring the mass of the load during loading of the scales being measured weight, the load on the dynamometer is maintained equal to the largest measurement limit, and at the time of measurement

the masses completely remove the load from the load device.

The drawing shows a diagram of a device that implements a method of measuring the mass of a load.

The device comprises a portal 1, a traverse of a portal 2, a traverse of a load receiving device 3, a traverse 4, rigidly connected by rods 5 to a traverse of a portal 2, a force-loading device 6, a dynamometer 7, a process vessel 8, a platform 9, rigidly connected by rods 10 to a traverse cargo receiving device 3, control panel 11.

A method for measuring the mass of a load is implemented as follows.

The container for the process fluid 8 is mounted on the platform 9 and, using the rod 10, is rigidly connected to the traverse of the load receptor 3. The empty weight is compensated and the device is set to zero. According to the control signal from the remote control 11, the power-loading device 6 is turned on, installed with a gap between the upper cross-beam 4 and the cross-beam of the load-receiving device 3, a gap is selected and the dynamometer 7 with a power-loading device is clamped in a rigid frame, formed

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the upper traverse bath, portal traverse 2 and tacks 5. Turning on the power-loading device increases its linear dimensions and increases the load on the dynamometer. When the power-loading device is turned on, its linear dimensions decrease, the load on the dynamometer decreases and even after the appearance of the gap between the upper traverse and the load-bearing device, the dynamometer is completely released. Conducting several cycles of dynamometer preloading. After training the dynamometer, the power-loading device is turned off, empty containers are compensated, and the process of determining the mass of liquid begins. Using a force-loading device, the dynamometer is loaded with a force equal to the weighing limit, the tank is filled with process fluid. As the fluid mass increases, the load on the dynamometer decreases and, according to its indications, is maintained at the level of the weighing limit. During the measurement, the load is completely removed and determination

the mass of fluid is carried out on the reverse stroke of the calibration characteristics of the dynamometer according to the formula

m

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where m is the mass of the cargo;

G is the gravity of the weighed mass;

PB - air density;

RG - the density of the weighed mass;

g is the local acceleration of gravity.

Using the proposed method for determining the mass provides:

- reduction of measurement errors from creep of the elastic sensor element of the dynamometer and measurement errors from hysteresis, i.e. realizes the purpose of the invention is to increase the accuracy of weighing slowly varying masses.

The proposed method is most effective in technological processes with slow (within 3-5 hours) loading of the balance.

Claims (1)

The claims A method of measuring the mass of a load, including pre-loading the dynamometer with a load using a force-loading device equal to the largest measurement limit, loading the scales with a weighed mass, changing the load on the dynamometer from the load-loading device, and measuring the mass of the load, characterized in that, in order to increase the measurement accuracy, it slowly changes masses during the loading of the scales with measured mass, the load on the dynamometer is maintained equal to the largest measurement limit, and for a while Merényi mass completely remove the load from silonagruzhayuschego device. 1 10