Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (3): 905-910.doi: 10.13278/j.cnki.jjuese.20190054

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An Improved t0 Method for Determining Normal Depth of Refractive Surface

Li Qicheng, Guo Lei, He Shugeng, Min Ye   

  1. Mining College, Liaoning Technical University, Fuxin 123000, Liaoning, China
  • Received:2019-03-23 Published:2020-05-29
  • Supported by:
    Supported by Liaoning Provincial Key R & D Program Guidance Plan(2019000901),Liaoning Provincial Department of Education Project (551610001219) and National Natural Science Foundation of China (41674055)

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Abstract: The existing t0 method to determine the normal depth of refractive surface has the following problems:firstly, the calculation process is complicated by using the idea of elementary mathematics and introducing the process function into the calculation process; secondly, there are two approximations in the solution, which increases the error of results; finally, when the normal depth curve is smoothed by using the existing method, the manual offset processing is not only time-consuming and laborious, but also causes manual errors. An improved method to determine the normal depth of refractive surface is therefore proposed. This method adopts advanced mathematics without process function, which makes the calculation more accurate through eliminating the approximation problem and reducing the calculation error; and the method smooths the normal depth curve by using the adjacent average method, which improves work efficiency, cuts labor cost, and realizes the whole process of computer processing. In comparison with the results by the existing one, the results by the improved method are more in accord with the changes of true refracted wave depth, therefore it can accurately determine the refractue surface tilt angle.

Key words: refraction wave method, t0 difference time interval curve method, normal depth

CLC Number: 

  • P631.4
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