A guided wave detection device
A detection device and guided wave technology, applied in the direction of material magnetic variables, etc., can solve the problems of inability to detect electromagnetic wave signals, meaningless detection results, impossible balance and unbalance conversion, etc., and achieve the effect of convenient and fast positioning
Active Publication Date: 2015-11-25
SUZHOU HUAYA TELECOMM EQUIP
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Problems solved by technology
3) The sensor, that is, the probe, is not designed for balanced and unbalanced conversion, that is, balanced and unbalanced conversion is impossible, and serious interference signals can completely submerge weak reflection signals, making the detection results meaningless
When two or three modes of electromagnetic waves exist at the same time, the electromagnetic wave signal related to the defect cannot be detected without using a polarization separator and a multimode elliptic filter
Method used
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[0026] like figure 1 and figure 2 As shown, a guided wave detection device includes a sensor 1 electrically connected to each other, an ultra-high frequency signal transceiver 2, a part of the signal analysis processor 3, and a portable computer display 4; The high-frequency signal transceiver 2 is electrically connected to the part of the signal analysis processor 3;
[0027] The sensor 1 includes a gradual change circular tube 11, a transitional rectangular tube 12, a coupler trunk 13 and a coupler branch 14, a signal output device 15, a collection signal input device 16, a sensor interface one 17 and a sensor interface two 18; The conical nozzle of the tapered circular tube 11 completes the transmission and reception of the UHF guided wave signal, and is adapted to the caliber of the measured heat transfer metal tube 5; Processed into a rectangular waveguide cavity, and a probe is provided in the waveguide cavity; the sensor interface one 17 is electrically connected to ...
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The invention discloses a guided wave detection device. The device comprises a sensor, an ultrahigh-frequency signal transceiver, a signal analysis processor and a display, wherein the sensor is electrically connected with the ultrahigh-frequency signal transceiver and the signal analysis processor through radio frequency cables; the sensor comprises a gradient circular tube, a transition type rectangular tube, a signal output device, an acquired signal input device and sensor interfaces; a mouth of the gradient circular tube finishes the transmission and reception of ultrahigh-frequency guided wave signals; inner cavities of the signal output device and the acquired signal input device are machined to form rectangular waveguides; the ultrahigh-frequency signal transceiver generates and outputs ultrahigh-frequency signals, and sweeps a signal source; the signal analysis processor has the functions of acquiring, converting, storing, processing and inputting / outputting (I / O) electromagnetic guided wave signals; and the display finishes the transmission communication of time-domain reflection signals of a heat transfer tube. The positions of defects are obtained by utilizing the correlation between the propagation and the phase shift amount of guided waves and the defects of the heat transfer tube of a heat exchanger by a time-domain reflection technology; and the positions and depths of the defects can be rapidly determined during practical detection or in-service inspection.
Description
technical field [0001] The invention relates to the field of corrosion and damage detection of heat transfer tubes of steam generators, in particular to a guided wave detection device. Background technique [0002] At present, the world-recognized device for inspecting heat transfer tubes of steam generators in nuclear power plants is the eddy current detector. When in use, it is necessary to send the eddy current probe, that is, the sensor, to the measured part. All have their own characteristics due to different sensors. The principle is to use the difference of electromagnetic eddy current field to determine the location or size of the defect. During the in-service inspection of the nuclear power plant, it is not suitable to stay in the nuclear island for too long. Most of the eddy current sensors are transmitted by robotic technology and cannot stay in the nuclear island for too long. . The guided wave method also uses a service robot in the detection, because the sens...
Claims
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IPC IPC(8): G01N27/82
Inventor 王彩男周在杞韩旭鹏杨曙光
Owner SUZHOU HUAYA TELECOMM EQUIP