Automatic monitoring system of tobacco-leaf bulk curing barn

Abstract

The invention provides an automatic monitoring system of a tobacco-leaf bulk curing barn, comprising a first controller and a second controller, wherein the first controller comprises a dry-bulb temperature sensor, a wet-bulb temperature sensor and a first processor, the first processor is connected with the dry-bulb temperature sensor, the wet-bulb temperature sensor and the second controller, respectively; while the second controller comprises a rectification bridge, a filtered-wave voltage regulation circuit and a triphase inverting bridge that are connected with each in series, wherein one end of a second processor is connected with the triphase inverting bridge, while the other end is connected with the first processor. The invention realizes conversion from one phase supplying power to three phases supplying power and automatically controls the humiture in the barn, the frequency control of the circulating fan and the coal quantity used in the tobacco-leaf curing period, thereby enhancing the quality of the tobacco-leaf as well as saving labour, energy and production cost.

Description

technical field [0001] The invention relates to the field of dense tobacco barns, in particular to an automatic monitoring system, which is used for real-time regulation of the temperature and humidity of the barn, and realizes the conversion from single-phase power to three-phase power. Background technique [0002] The drying process of tobacco leaves involves the regulation of the temperature and humidity of the barn. In the flue-cured tobacco process, mechanical auxiliary ventilation is used to achieve hot air circulation, increase the wind speed in the gap between tobacco leaves in the curing room, and speed up the transfer and exchange of heat and humidity. Uniform temperature and humidity distribution, smooth ventilation and dehumidification are conducive to more complete yellowing of tobacco leaves. After loading fixed-color dry leaves, the internal and external metering of tobacco leaves after roasting has been greatly improved and improved. [0003] Most of the po...

AI Technical Summary

Problems solved by technology

There are some deficiencies in the above-mentioned automatic control system. First, it still cannot solve the power supply problem of the three-phase asynchronous motor

Secondly, fan speed regulation cannot be controlled automatically and smoothly, while manual control has shortcomings such as poor precision and serious lag

If the fan speed is too high, the energy will be wasted. If the speed is too small, the baking curve will deviate from the set value, reducing the rate of yellow smoke, and the rate of high-quality smoke is also less than the expected value.

Furthermore, coal addition is done manually, which is labor-intensive and time-consuming, and it is inevitable to add more or less coal, which affects the quality of tobacco leaf curing and wastes energy.

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