CN103454348B - The supersonic detection method of a kind of pulsating wave and continuous wave alternative excitation - Google Patents
The supersonic detection method of a kind of pulsating wave and continuous wave alternative excitation Download PDFInfo
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- CN103454348B CN103454348B CN201310417068.5A CN201310417068A CN103454348B CN 103454348 B CN103454348 B CN 103454348B CN 201310417068 A CN201310417068 A CN 201310417068A CN 103454348 B CN103454348 B CN 103454348B
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Abstract
The invention discloses the supersonic detection method of a kind of pulsating wave and continuous wave alternative excitation, by adopting pulsating wave and continuous wave alternative excitation, integrated pulse ripple and continuous wave encourage the advantage detected, obtain the ultrasound detection signal with high-penetrability and high spatial resolution, the comparatively complete Acoustic detection information of examined workpiece can be obtained, be applicable to the Inner Defect Testing of high acoustic absorption compound substance.
Description
Art
The present invention relates to a kind of lossless detection method, particularly relate to the supersonic detection method of a kind of pulsating wave and continuous wave alternative excitation.
Background technology
Current Ultrasonic Detection adopts pulsating wave or continuous wave two kinds of pumping signals usually, the ultrasound detection signal spatial resolution adopting pulsating wave excitation to produce is high, penetration capacity is weak, and the spatial resolution of the ultrasound detection signal adopting continuous wave excitation to produce is weak, penetration capacity is strong.For high acoustic absorption composite inner defects detection, two kinds of methods all cannot obtain comprehensive and accurate defect information.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art, provide the supersonic detection method of a kind of pulsating wave and continuous wave alternative excitation, adopt the method for pulsating wave and continuous wave alternative excitation, advantage pulsating wave and continuous wave encouraged is comprehensive.
The technical solution adopted for the present invention to solve the technical problems is: the supersonic detection method of a kind of pulsating wave and continuous wave alternative excitation, and the signal generator of ultrasound measuring instrument replaces excitation pulse wave excitation signal and continuous wave pumping signal; The ultrasound detection signal that paired pulses wave excitation produces carries out time-domain analysis; Frequency-domain analysis is carried out to the ultrasound detection signal that continuous wave excitation produces, is differentiated the phase and magnitude of continuous wave pumping signal by phase-sensitive detection circuit; The spatial resolution of the ultrasound detection signal that pulsating wave excitation produces is high, penetration capacity is weak, the spatial resolution of the ultrasound detection signal that continuous wave excitation produces is weak, penetration capacity is strong, both alternately combine, and can obtain the comparatively complete Acoustic detection information of examined workpiece.
The invention has the beneficial effects as follows, the supersonic detection method of a kind of pulsating wave and continuous wave alternative excitation is provided, by adopting pulsating wave and continuous wave alternative excitation, integrated pulse ripple and continuous wave encourage the advantage detected, obtain the ultrasound detection signal with high-penetrability and high spatial resolution, the comparatively complete Acoustic detection information of examined workpiece can be obtained, be applicable to the Inner Defect Testing of high acoustic absorption compound substance.
Below in conjunction with embodiment, the present invention is described in further detail, but the supersonic detection method of a kind of pulsating wave of the present invention and continuous wave alternative excitation is not limited to embodiment.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is pulsating wave and the continuous wave alternative excitation signal schematic representation of the embodiment of the present invention.
In figure, P. pulsating wave pumping signal, C. continuous wave pumping signal, v. amplitude, t. time.
Embodiment
Embodiment as shown in Figure 1, the supersonic detection method of a kind of pulsating wave and continuous wave alternative excitation, the signal generator of ultrasound measuring instrument alternately excites (v, t) pulsating wave pumping signal P and continuous wave pumping signal C; The ultrasound detection signal that paired pulses wave excitation produces carries out time-domain analysis; Frequency-domain analysis is carried out to the ultrasound detection signal that continuous wave excitation produces, is differentiated the phase and magnitude of continuous wave pumping signal by phase-sensitive detection circuit; The spatial resolution of the ultrasound detection signal that pulsating wave excitation produces is high, penetration capacity is weak, the spatial resolution of the ultrasound detection signal that continuous wave excitation produces is weak, penetration capacity is strong, both alternately combine, and can obtain the comparatively complete Acoustic detection information of examined workpiece.
Above-described embodiment is only used for further illustrating the supersonic detection method of a kind of pulsating wave of the present invention and continuous wave alternative excitation; but invention is not limited to embodiment; every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all fall in the protection domain of technical solution of the present invention.
Claims (1)
1. a supersonic detection method for pulsating wave and continuous wave alternative excitation, is characterized in that: the signal generator of ultrasound measuring instrument replaces excitation pulse wave excitation signal and continuous wave pumping signal; The ultrasound detection signal that paired pulses wave excitation produces carries out time-domain analysis; Frequency-domain analysis is carried out to the ultrasound detection signal that continuous wave excitation produces, is differentiated the phase and magnitude of continuous wave pumping signal by phase-sensitive detection circuit; The spatial resolution of the ultrasound detection signal that pulsating wave excitation produces is high, penetration capacity is weak, the spatial resolution of the ultrasound detection signal that continuous wave excitation produces is weak, penetration capacity is strong, both alternately combine, and can obtain the comparatively complete Acoustic detection information of high acoustic absorption compound substance.
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| CN201310417068.5A CN103454348B (en) | 2013-09-13 | 2013-09-13 | The supersonic detection method of a kind of pulsating wave and continuous wave alternative excitation |
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| CN103454348B true CN103454348B (en) | 2015-10-07 |
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Citations (3)
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| CN102095082A (en) * | 2010-12-13 | 2011-06-15 | 上海应用技术学院 | Single-channel time reversal guided wave detection device and method for pipeline |
| CN102594461A (en) * | 2012-03-23 | 2012-07-18 | 斯肯威（上海）工业检测科技有限公司 | Combined modulation ultrasonic pulse transceiving method and device |
| CN102721747A (en) * | 2012-06-08 | 2012-10-10 | 北京航空航天大学 | Non-colinear non-linear ultrasonic nondestructive testing method |
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2013
- 2013-09-13 CN CN201310417068.5A patent/CN103454348B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095082A (en) * | 2010-12-13 | 2011-06-15 | 上海应用技术学院 | Single-channel time reversal guided wave detection device and method for pipeline |
| CN102594461A (en) * | 2012-03-23 | 2012-07-18 | 斯肯威（上海）工业检测科技有限公司 | Combined modulation ultrasonic pulse transceiving method and device |
| CN102721747A (en) * | 2012-06-08 | 2012-10-10 | 北京航空航天大学 | Non-colinear non-linear ultrasonic nondestructive testing method |
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| SiCp颗粒增强铝基复合材料非共线非线性响应试验观察;刘斯明等;《机械工程学报》;20121130;第48卷(第22期);全文 * |
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