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System and method for measuring temperature in real time based on thermoacoustic effect

A real-time measurement, thermoacoustic effect technology, applied in the direction of thermometers, thermometers, measuring devices, etc. with physical/chemical changes, can solve problems such as difficulty, high price, can not guarantee the safety of surrounding healthy tissue or sensitive parts, etc., to achieve data processing Simple, high spatial resolution effects

Inactive Publication Date: 2010-09-08
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the differences in biological tissues and different characteristics in different temperature regions, it is very difficult to use a single method to achieve non-destructive temperature measurement in all temperature ranges.
Moreover, the ultrasonic method can only obtain an average temperature in a certain area, and cannot reflect the temperature distribution of the area, and then cannot guarantee the safety of surrounding healthy tissues or sensitive parts.
The time resolution, spatial resolution and temperature resolution of nuclear magnetic resonance method are far inferior to those of invasive temperature measurement, and its high price is not conducive to popularization and application

Method used

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  • System and method for measuring temperature in real time based on thermoacoustic effect
  • System and method for measuring temperature in real time based on thermoacoustic effect
  • System and method for measuring temperature in real time based on thermoacoustic effect

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Experimental program
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Effect test

Embodiment 1

[0052] figure 1 It is the temperature real-time measurement system based on the thermoacoustic effect of the present invention: 1-1 is a thermoacoustic excitation source generator, 1-2 is a transmission medium, 1-3 is a multi-element thermoacoustic detector, 1-4 is a signal amplifier, 1 -5 is a computer (PXI bus industrial computer), 1-6 is a function generator, 1-7 is a multi-channel parallel data acquisition system, 1-8 is a measured substance, and 1-9 is a display.

[0053] use figure 1 The system shown in the schematic diagram of the structure measures the temperature of the isolated tumor tissue in real time:

[0054] (1) The pulsed microwave generated by the pulse wave generator (the wavelength is 0.01 mm ~ 1 m, the average power is obtained by adjusting the microwave pulse repetition frequency by the function generator) is uniformly radiated into the isolated tumor tissue through the waveguide directional radiation antenna. The energy absorbed by the body tumor tissue...

Embodiment 2

[0062] (1) The pulsed microwave generated by the pulse wave generator (wavelength is 0.01mm ~ 1m, the average power is obtained by adjusting the microwave pulse repetition frequency by the function generator) is evenly radiated to the agar and ferric oxide through the waveguide directional radiation antenna. In the sample made of nanoparticles, the energy absorbed by the tumor tissue causes an instantaneous temperature rise, which excites and generates a thermoacoustic signal;

[0063] (2) The sample is heated by the water bath method, and the temperature of the sample increases;

[0064] (3) A multi-element linear array detector coated with acoustic coupling agent mineral oil receives the thermoacoustic signal, amplifies the multi-element thermoacoustic signal through a multi-element signal amplifier, and then collects and processes it in real time through a multi-channel parallel data acquisition system;

[0065] (4) Process and record the thermoacoustic signal of the measur...

Embodiment 3

[0070] Embodiment 3 (see Figure 7 )

[0071] (1) The continuous laser ( Figure 7-5 , with a wavelength of 500nm to 1064nm) uniformly radiates to the isolated tumor tissue to be treated through the optical fiber ( Figure 7-1 ), see Figure 7 ;

[0072] (2) Absorption of laser energy by tumor tissue leads to temperature rise;

[0073] (3) The pulse laser generated by the pulse laser ( Figure 7-4 ) radiates to the area to be tested, and excites the thermoacoustic signal ( Figure 7-3 );

[0074] (4) The multi-element annular array detector coated with acoustic coupling agent mineral oil ( Figure 7-2 ) receiving the thermoacoustic signal, amplifying the multivariate thermoacoustic signal through a multivariate signal amplifier, and then collecting and real-time processing through a multi-channel parallel data acquisition system;

[0075] (5) Process and record the thermoacoustic signal of the measured isolated tumor tissue, and obtain the relationship parameters A and...

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Abstract

The invention discloses a system and a method for measuring temperature in real time based on thermoacoustic effect. A thermoacoustic signal of a detected material is detected by using thermoacoustic imaging equipment; a relation parameter of the temperature of the detected material and the thermoacoustic signal amplitude value is obtained by data fitting; during actual temperature measurement, by using the known fitting parameters and through the relation of the temperature of the detected material and the thermoacoustic signal, the temperature of the detected material is obtained by reversely deducing and analyzing by using a one-dimensional thermoacoustic signal; and finally a temperature distribution figure is displayed on a computer in real time. Combined with the advantages of thermoacoustic technology, the system and the method for measuring the temperature in real time based on the thermoacoustic effect have high accuracy and high spatial resolution, and can quickly obtain temperature change parameters and the temperature distribution figure in real time under the condition of no damage, wherein the temperature measurement accuracy can reach 0.2 DEG C, so a reliable monitoring method and a system device are provided for real-time and nondestructive measurement of material temperature.

Description

technical field [0001] The invention belongs to the technical field of non-destructive temperature measurement, in particular to a system and method for real-time temperature measurement inside an object based on a thermoacoustic effect. Background technique [0002] Existing temperature measuring instruments can be divided into two categories: contact type and non-contact type according to the temperature measurement method. Generally speaking, contact temperature measuring instruments are relatively simple, reliable, and have high measurement accuracy; however, due to the sufficient heat exchange between the temperature measuring element and the measured medium, it takes a certain amount of time to achieve thermal equilibrium, so there is a temperature delay. The non-contact instrument measures the temperature through the principle of heat radiation. The temperature measuring element does not need to be in contact with the measured medium, nor will it destroy the temperatu...

Claims

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Application Information

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IPC IPC(8): G01K11/22A61B5/01
Inventor 邢达娄存广杨思华
Owner SOUTH CHINA NORMAL UNIVERSITY
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