Visualization Study On Two-dimensional Temperature Field Based On Acoustic Measurement Methods

The detection of the temperature field is very important in scopes of researches, the agricultural and industrial production and the daily life. However, measurement of temperature field is a very complex issue; the traditional temperature measurement methods have been far from able to meet needs of the production and living. As a new temperature measurement method, acoustic method has characteristics of easy maintenance, large-space, non-contact, real-time continuous and a broader measuring range. In industrial production, scientific research to meet needs of on-line control of temperature field, especially in the inclement condition of high temperature, this method is better advantages and characteristics that traditional methods can not compare.The paper studies two-dimensional temperature field of circular boundary by acoustic measurement. First of all, it presents a new two-dimensional temperature field of circular boundary of zoning method, describes two-dimensional temperature field of acoustics method for reconstruction of thinking, applies of VC language developed reconstruction algorithm for least-squares procedure, and reconstructs the four kinds of models to simulate the temperature field. In this subject, it plots the four models temperature field and temperature field in three-dimensional reconstruction of maps by applying of MATLAB software interpolation functions and drawing functions of the four models. It also analyzes simulation results to verify the application of least squares reconstructing of the feasibility of reconstruction of two-dimensional temperature field. It also verified the way of son temperature regional of hexagon was zoned is reasonable. Secondly, in laboratory conditions, it has set up a acoustic measurement experiment system of two-dimensional temperature field of circular boundary to measure sound at all effective path flying time ti, and this subject gains the necessary amendments in order to achieve the upper machine using the above measured time interval, reconstructing procedures, and other parameters necessary for the anti-performed at room temperature under laboratory conditions the temperature field and single-peak symmetric temperature field measurement results. Visualization of the temperature field has been achieved. Third, at the same time, by using real-time multi-point temperature measurement system of to the DS18B20 temperature sensor, the subject measures no heat temperature field and single-peak symmetric temperature field by the acoustic method and points, and does a comparative analysis of acoustic measurements. That for no heat temperature field maximum temperature difference is only 0.167K and the maximum error is only 0.06%. For single-peak symmetric temperature field maximum temperature difference is only 13K and the maximum error is only 3.9%. The results show that obtained by two methods basically consistent temperature distribution within the allowable error. The result proved that the temperature measuring system acoustics is right, reasonable and practical. Finally, the subject analyzes the error of experimental results and suggests improvement of acoustic measurements of two-dimensional temperature field under laboratory conditions...