Magnetic nanoparticle inductance temperature measurement method and device used for electromagnetic heating equipment

A technology of magnetic nanoparticles and heating equipment, which is applied in the direction of using electric devices, thermometers and measuring devices using electric/magnetic elements that are directly sensitive to heat, and can solve the inconvenient use of magnetic temperature measurement technology with penetrating ability, etc. problems, to achieve the effect of offsetting background interference and reducing volume

Pending Publication Date: 2018-12-21
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] However, in the currently known magnetic temperature measurement technology, it is required to maintain a non-magnetic environment around
This makes the penetrating magnetic temperature measurement technology very inconvenient for industrial use

Method used

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  • Magnetic nanoparticle inductance temperature measurement method and device used for electromagnetic heating equipment
  • Magnetic nanoparticle inductance temperature measurement method and device used for electromagnetic heating equipment
  • Magnetic nanoparticle inductance temperature measurement method and device used for electromagnetic heating equipment

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] Such as figure 1 As shown, the present invention provides a magnetic nanoparticle inductive temperature measurement method that can be used for electromagnetic heating equipment, comprising the following steps:

[0030] (1) Choose the most common such as E-type iron core to form a symmetrical structure. The sum of the sectional areas of the two side columns of the E-shaped iron core is equal to the sectional area of ​​the central column. On the E-shaped iron core, the same direction excitation coil with the same position and symmetrical property is wound, and the coil inductance is L=μ o ...

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Abstract

The invention discloses a magnetic nanoparticle inductance temperature measurement method used for electromagnetic heating equipment. The method specifically comprises the following steps that: takingan induction coil as a center, and symmetrically arranging same-direction exciting coils with the same attribute on two sides of the induction coil; placing magnetic nanoparticles on a position of which the temperature is to be detected; and introducing low-frequency alternating current into the two exciting coils, collecting an output voltage signal of the induction coil, and through the linearcorrelation of the output voltage amplitude of the induction coil and magnetic conductivity, and carrying out calculation to obtain magnetic susceptibility generated by the magnetic nanoparticles. Theinvention also provides a device for realizing the above method. By use of the method, the primary harmonic amplitude of the detection signal of the induction coil is obtained, the change amount of the alternating current magnetic susceptibility of the magnetic nanoparticle along with temperature is calculated so as to realize magnetic nanometer temperature measurement, the background interference of ferromagnetic materials in the environment can be eliminated, and the volume of an existing magnetic nanometer measurement device is effectively reduced so as to meet the application requirementof small volume.

Description

technical field [0001] The invention relates to the technical field of nanomaterial testing, in particular to a magnetic nanoparticle inductive temperature measurement method and device for electromagnetic heating equipment. Background technique [0002] In industrial production and daily applications, many devices are related to thermal processes. The temperature of the inner wall of these thermal equipment is an important parameter of the operating state of the equipment. However, most of the heating vessel temperature is difficult to obtain by contact temperature measurement method. Taking the induction cooker as an example, in order to achieve temperature control and overheat protection during the heating process, it is necessary to measure the temperature of the heating element such as the pot in real time and feed it back to the heating control component. The panels used in the induction cooker are usually made of glass-ceramics and other materials, which have better...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/36
CPCG01K7/36
Inventor 刘文中郭斯琳易文通周铭
Owner HUAZHONG UNIV OF SCI & TECH
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