High Precision Weighing System in Flow Standard Units

Abstract

The invention provides a high-precision weighing system, which includes: a container to be tested, which is used to receive the liquid to be tested in a flow standard device; an electronic scale, which weighs the liquid to be tested; There is a weight frame on the scale, the container to be tested is located above the weight frame, and at least one weight group is connected to the weight frame, and the weight group is used to calibrate the electronic scale. The weight system is compact in structure, with an automatic weight loading mechanism, and the system is effectively isolated from the use environment, ensuring the use conditions of the standard. The high-precision weighing system has high accuracy and stability, and can reduce the uncertainty of the liquid flow standard device.

Description

technical field [0001] The invention relates to a weighing system, in particular to a high-precision weighing system used in flow standard devices. Background technique [0002] As a standard for the unification and transmission of flow unit values, the liquid flow standard device is widely used in the verification and calibration of flow meters, ensuring that the values ​​of various regions and departments in our country are unified on one standard, and providing services for various tasks such as trade accounting. Important reference. Among them, the static mass method flow standard device is considered to be the most accurate method among all flow measurement methods, and its working principle is as follows: figure 1 As shown, start the water pump 1, take water from the pool 6 to the test pipeline, and there is a buffer container 2 downstream of the water pump 1, which is used to stabilize the pressure and flow of the liquid output by the water pump. Meter 3 and flow co...

AI Technical Summary

Problems solved by technology

However, in general flow devices, electronic scales are manually loaded with weights for calibration. By loading standard weights, the mass of the standard weights is compared with the displayed mass of the electronic scale, so as to realize simple correction of the electronic scale; in addition, some The device adopts the weight automatic loading mechanism, and uses multiple calibration points to correct the electronic scale, but the weight is generally hung under the weighing pan, usually in a group of 10 weights, and the weight is gradually loaded for calibration by loading the weight, but Since each group of weights needs to occupy a large height space, the electronic scale needs to be installed on a high platform, which makes the installation complicated on the one hand, and on the other hand, the stability of the platform also affects the accurate measurement of the electronic scale

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