Improved FISTA temperature field reconstruction algorithm based on ultrasonic waves

An ultrasonic and improved technology, which is applied in the field of temperature field reconstruction algorithm, can solve the problems of poor truncated singular value decomposition reconstruction effect and difficult singular value truncation, so as to improve the convergence speed and sound source identification performance, and increase the iteration step size , Solve the cumbersome effect of the iterative process

Pending Publication Date: 2022-04-15
YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
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Problems solved by technology

However, since the singular value of the coefficient matrix is ​​often in a state of continuous decline, it is difficult to sel

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  • Improved FISTA temperature field reconstruction algorithm based on ultrasonic waves
  • Improved FISTA temperature field reconstruction algorithm based on ultrasonic waves
  • Improved FISTA temperature field reconstruction algorithm based on ultrasonic waves

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Embodiment Construction

[0059] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0060] 1. Detailed Algorithm

[0061] Aiming at the existing ultrasonic reconstruction temperature field algorithm, the present invention is inspired by the magnetic resonance imaging field, and proposes an improved FISTA temperature field reconstruction method based on ultrasonic waves.

[0062] 1. Temperature field reconstruction system and the setting of the area to be tested

[0063] The schematic diagram of the temperature field reconstruction system is shown in figure 1 As shown, the entire temperature field reconstruction system is mainly composed of a transceiver acoustic wave transducer, a data acquisition card, a signal conditioning circuit and a channel selection circuit.

[0064] The general steps of acoustic temperature field reconstruction can be briefly summarized as follows:

[0065] 1) Consider the temperature complexity and...

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Abstract

The invention discloses an improved FISTA temperature field reconstruction algorithm based on ultrasonic waves, and the algorithm comprises the following steps: 1, dividing a measurement region into a certain number of discrete grids; step 2, constructing a temperature error objective function based on discrete grid points; step 3, based on the measured sound wave flying time data, solving the objective function by using an improved FISTA algorithm to obtain temperature distribution of the measurement area under the grid; and 4, carrying out cubic Hermite interpolation on the temperature distribution obtained under the measurement area grid to obtain the temperature field distribution of the whole measurement area. According to the improved FISTA algorithm provided by the invention, the physical information and the sound wave flying time of the detected area are utilized, and the rapid reconstruction of the temperature field is realized. By resetting the acceleration parameter, the problem of fluctuation instability in the iterative reconstruction process of the temperature field is solved. Meanwhile, according to the algorithm, a positive definite matrix is introduced into a gradient function, and the reconstruction speed and the reconstruction precision of the temperature field are improved.

Description

technical field [0001] The invention relates to the technical field of temperature field reconstruction algorithms, in particular to an improved FISTA temperature field reconstruction algorithm based on ultrasonic waves. Background technique [0002] As one of the basic physical quantities, temperature can help to obtain a variety of useful information by monitoring temperature changes. Therefore, the use of acoustic temperature field reconstruction technology to obtain temperature distribution information in a timely and accurate manner has broad application prospects in the fields of ensuring efficient and stable operation of industrial furnace systems, improving grain storage quality, remote monitoring of atmospheric parameters, and temperature distribution monitoring of submarine hot springs. [0003] With the development of science and technology, my country's demand for electricity is increasing day by day, which has led to the rapid development of the power generation...

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Application Information

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IPC IPC(8): G01K11/24
Inventor 钟其水施开波白金平杨金陈尹胜
Owner YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
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