An Error Correction Method for Discrete Medium Pressure Measurement

Abstract

The invention discloses an error correction method for discrete medium pressure measurement, and belongs to the technical field of the discrete medium pressure measurement. The error correction methodcomprises the following steps: measuring a pressure value by adopting a pressure sensor; measuring an equivalent projection area average particle size of the discrete medium particle; computing an effective projection area Sk of the discrete medium particle; and then computing to acquire distribution density n of the discrete medium on a sensing film of the pressure sensor; computing to acquire relative error delta of the pressure measurement value; and computing to acquire the pressure measurement value Xc after error correction through the relative error delta. The a, b and c in the error correction formula are only related to the sensor, the determination of the a, b and c is obtained by fitting through data settling on the experiment basis; after the a, b and c are determined, the sensor adopts the same error correction formula when measuring various discrete mediums; the error correction cost is considered, individual difference of the sensor is also taken into consideration, andthe pressure measurement precision of the discrete medium is effectively improved.

Description

technical field [0001] The invention relates to the technical field of discrete medium pressure measurement, in particular to an error correction method for discrete medium pressure measurement. Background technique [0002] In many industries, the measurement of earth pressure is often required in both engineering practice and scientific research. At the same time, in agriculture, during the processing, transportation and storage of agricultural products, the pressure measurement of agricultural products such as grains is often used. This type of medium is a solid medium and has the characteristics of granularity. For measuring the pressure generated by such media, it belongs to the pressure measurement of solid media. At present, the measurement of the pressure of such solid media is by means of the measurement of fluid pressure. It can be seen that the measurement of physical quantities depends on measuring instruments, and the measurement of solid pressure also depend...

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Problems solved by technology

This type of sensor is only suitable for the measurement of uniformly distributed pressure, and the pressure generated by the discrete medium is composed of concentrated forces at multiple points, which is not continuous, and there is an error in the measurement of its pressure. The present invention proposes a solution for this measurement error a correction method

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