Three-port technology based coaxial material microwave real-time detection device

A detection device and real-time detection technology, applied in the direction of using microwave flaw detection, etc., can solve the problems of high cost, instability, and difficulty in judging small changes, so as to reduce the misjudgment rate and improve the measurement accuracy.

CN108896582AInactive Publication Date: 2018-11-27UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-11-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of microwave applications, and concretely provides a three-port technology based coaxial material microwave real-time detection device. The device includesa microwave detection waveguide and three microwave transmission waveguides with the same structure. The microwave detection waveguide is a circular waveguide and is used for accommodating a to-be-detected coaxial material to pass through and forming a coaxial transmission line structure with the to-be-detected coaxial material. One of the microwave transmission waveguides is connected to the middle of the microwave detection waveguide through a mode converter and is used as an input port of the detection device. The other two microwave transmission waveguides are respectively connected to the two ends of the microwave detection waveguide through mode converters and are used as output ports of the detection device. The detection adopts the two output ends, and the distance from the inputport to the two output ports is equal. The detection device can discriminate the state of the coaxial material in real time through the change of an S parameter, can effectively improve the measurement accuracy and reduce the misjudgment rate, and can realize nondestructive detection and high accuracy detection of defects of the coaxial material.
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Description

technical field

[0001] The invention belongs to the field of microwave application technology, in particular to a system for detecting defects and differences of coaxial materials by a microwave three-port device, in particular to a microwave real-time detection device for coaxial materials based on three-port technology. Background technique

[0002] In the current communication system, the coaxial transmission line has been widely used because of its advantages of low loss, flexibility, and wide frequency bandwidth. At present, various coaxial cables based on new technologies emerge in an endless stream, such as flexible coaxial cables based on foamed polyethylene processing and leakage antennas based on them, which have been widely used in indoor, underground, and rail transit communications; but due to technical reasons , In the production process, especially in the foaming process, the foaming system often has instability problems, resulting in various defects in the fo...

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, which should not be construed as a limitation of the present invention.

[0021] This embodiment provides a coaxial material microwave real-time detection device and detection system based on three-port technology; wherein, the model of the detection device is as follows figure 1 , figure 2 As shown, all parts are made of aluminum alloy, such as image 3 As shown, the detection device includes a microwave detection waveguide and three microwave transmission waveguides with the same structure. The microwave detection waveguide is a circular waveguide, which is used to accommodate the passage of the coaxial material to be tested and jointly form a coaxial transmission line structure ; Wherein, one microwave transmission waveguide is connected to the middle position of the microwave detection waveguide through a mode converter as the input end of the det...