In-store measuring device for porosity of grains

Abstract

The invention discloses an in-store measuring device for the porosity of grains and belongs to a porosity measuring device. The device comprises a fan, a pipeline, a hot-wire anemometer, a solenoid valve, a grain store, a pressure sensor, a temperature sensor, signal wires and a detection circuit, wherein the detection circuit comprises a singlechip, a keyboard, a pressure detection circuit, a temperature detection circuit, a display screen, a driver and a buzzer; the fan is connected with the pipeline and used for blowing air into the grain store; the solenoid valve is mounted on the pipeline; a hole is formed in the middle point of the pipeline; the hot-wire anemometer is inserted into the hole; the grain store is well sealed; the signal wire penetrates through a pore in the top of the store; the pressure sensor and the temperature sensor are mounted in the store and connected with the detection circuit through the signal wires. Through the device, the porosity of the grains in a storage condition can be directly measured without sampling; the structures and the properties of the grains are not damaged; the device for the porosity of the grains is relatively accurate in result, relatively high in degree of automation, convenient to operate and simple in structure; the problems that the measurement result does not meet the actual storage condition, the structure is complex and the cost is high in an existing device are solved.

Description

technical field [0001] An on-storage measuring device for grain porosity, which belongs to the porosity measuring device Background technique [0002] Porosity measurement principles can be broadly classified into indirect and direct methods. The indirect method refers to the measurement of the porosity of materials by scanning, image processing technology or electrochemical, acoustic and optical principles. It has the advantages of high precision and does not change the structure and properties of materials. It is rarely used in practice. Direct methods include mercury intrusion method, density method, buoyancy method, and pycnometer method. Since the first three methods need to immerse the object to be tested in liquid, they are often used to measure the porosity of materials with poor water absorption (such as rocks), and are not suitable for the detection of materials with strong water absorption (such as grain), otherwise the structure of the material will be changed....

AI Technical Summary

Problems solved by technology

The above porosity measurement methods all require sampling, and can only measure the porosity of a small number of samples, ignoring the influence of a large amount of grain weight and vibration, which is different from the porosity of grain in the actual storage state

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