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Single-side axle counter sensor modeling method based on COMSOL

A technology of axle counting sensor and modeling method, which is applied in the direction of instrumentation, calculation, geometric CAD, etc., can solve the problems of calculation and analysis of magnetic field changes, huge number of cells, and complex subdivision methods, so as to reduce calculation time and reduce According to the degree of complexity, the effect of reliable calculation results

Inactive Publication Date: 2018-02-23
HARBIN INST OF TECH
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Problems solved by technology

[0005] However, the conventional method has the following problems: the subdivision method is complex, the number of cells is huge, the calculation time is long, and it is impossible to calculate and analyze the magnetic field change of the air near the key components (excitation coil, induction coil)

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  • Single-side axle counter sensor modeling method based on COMSOL
  • Single-side axle counter sensor modeling method based on COMSOL
  • Single-side axle counter sensor modeling method based on COMSOL

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Embodiment Construction

[0035] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0036] Such as figure 2 As shown, it is a finite element model of a single-side axle counting sensor, a rail, and a wheel, including a wheel 10 , a rail 20 , an induction coil 30 , and an excitation coil 40 .

[0037] Such as image 3 As shown, it is a schematic diagram of the meshing method of the present invention. When using the finite element method to calculate the electromagnetic field, after the model is established, an important step is to perform meshing. The appropriate meshing method will greatly reduce the calculation time, and at the same time , so that the calculation results can better reflect the actual situation.

[0038] The COMSOL-based single-side axle counting sensor mo...

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Abstract

The invention discloses a single-side axle counter sensor modeling method based on COMSOL. The single-side axle counter sensor modeling method includes the following steps that a finite element modelsphere is set up through a real product picture and comprises a wheel, a rail, an induction coil and a magnet exciting coil; the geometric central point of the finite element model is used as the sphere center, and a first air domain is set up to simulate the air environment where a single-side axle counter sensor runs; the geometric central point of the finite element model is used as the spherecenter, and a second air domain is set up; coarsening regular tetrahedral partition is carried out on the first air domain; refining regular tetrahedral partition is carried out on the second air domain and the single-side axle counter sensor, the rail and the wheel surrounded by the second air domain; material parameter setting is conducted on all part models, and material attribute values are set according to the actual values of materials of all the part models. By means of the method, partition complex degree can be effectively reduced, and the number of cells is reduced. The magnetic field change of the air domain around key components can be calculated, and the calculation result is more reliable.

Description

technical field [0001] The invention relates to the technical field of calculation of electromagnetic field distribution, in particular to a COMSOL-based single-side axle counting sensor modeling method. Background technique [0002] In the process of designing and optimizing the one-sided axle counting sensor, it is necessary to grasp the distribution of the magnetic field near the sensor when there are no wheels and the changing law of the magnetic field near the sensor when there are wheels. At present, the popular electromagnetic field calculation methods include infinite element method, finite element method, finite element-infinite element combination method, etc. All methods need to establish a model before calculation and perform meshing of the model. [0003] When using the finite element method to calculate and analyze the electromagnetic field, an important step is to carry out the finite element meshing of the model. The common grid subdivision method is to esta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23
Inventor 佟为明金显吉李中伟林景波李凤阁刘延龙叶书苑
Owner HARBIN INST OF TECH
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