Temperature online monitoring system for liquid aluminum in aluminum ladle based on acoustic temperature detection and method

Abstract

The invention belongs to the technical field of online monitoring of temperature of liquid aluminum in an aluminum ladle after vacuum aluminum discharge, and particularly relates to a temperature online monitoring system for liquid aluminum in the aluminum ladle based on acoustic temperature detection and a method. A sound wave conduit, an electric loudspeaker and a microphone are arranged in the same vertical section in the middle of both sides of the aluminum ladle. The electric loudspeaker sends a sound signal which is transmitted to the aluminum ladle by the sound wave conduit and penetrates through the liquid aluminum. The sound signal is received by the microphone and converted into a voltage signal which is input to a signal conditioner through a cable and enters a data collecting card from a junction box to be converted into a digital signal so as to calculate a sound wave flying time and finally calculate the temperature of the liquid aluminum in the aluminum ladle. According to the temperature online monitoring system for the liquid aluminum in the aluminum ladle based on acoustic temperature detection and the method provided by the invention, the continuously changing temperature of liquid aluminum can be truly reflected so that the inner quality of cast aluminum is improved. The system is not affected by severe environment such as high temperature of aluminum ladle, strong corrosion of liquid aluminum and dust, and can be remotely operated to the benefit of controlling and saving labor. Meanwhile, injury of operators caused by field temperature detection can be avoided.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of the temperature of molten aluminum in an aluminum ladle after vacuum tapping, and particularly relates to an on-line monitoring system and method for the temperature of molten aluminum in an aluminum ladle based on acoustic temperature measurement. Background technique [0002] Accurate measurement of the temperature of the molten aluminum in the aluminum ladle can improve the internal quality of cast aluminum, so it is very important to measure the temperature of the molten aluminum in the aluminum ladle. However, the temperature of the aluminum water in the aluminum ladle is usually extremely high and highly corrosive, and the working environment of the aluminum ladle is harsh, so there are high requirements for the measurement method of the temperature of the aluminum water in the aluminum ladle. [0003] At present, there are two main methods of measuring the temperature of molte...

AI Technical Summary

Problems solved by technology

The thermocouple temperature measurement method (contact type) is to manually insert the thermocouple temperature probe into the aluminum bag for temperature measurement, but this method has the following disadvantages: First, because the temperature of the aluminum water is very high, when the operator inserts the thermoelectric Occasionally, it is easy to be injured due to the splash of aluminum water; secondly, the temperature measurement results will fluctuate due to the difference in depth due to the manual insertion of the probe

In addition, because the aluminum water has a corrosive effect on the temperature measuring probe, it can only measure the temperature at intervals through the method of consumption point measurement, but cannot obtain the continuously changing temperature of the aluminum water, and it is necessary to replace a large number of thermocouples, costing higher

Infrared thermometer is currently a convenient instrument for measuring the temperature of aluminum water. However, it can only obtain the temperature of the surface of aluminum water. The temperature is not the real temperature of aluminum water, and the temperature measurement error is large

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