CAJ | 학술논문

超声探伤是工业中常用的一种无损检测方法，在实际探伤过程中，正确选择超声波探头参数对探伤效果十分明显，具有重要意义。以往为了表征探头特性，常引入探头参数对指向性的影响，但探头类型不尽相同，指向性函数的类型也有所不同。为减小主瓣宽度角，降低旁瓣幅度，保证探伤效果，文中基于波束形成算法理论，建立回波合成信号模型，优化参数使其简化，模型简单，通过仿真分析了不同超声相控线阵探头的阵元数、阵元间距、宽度以及探头频率对波束形成的影响并总结出规律，有助于选择探头参数，为超声相控线阵探头的设计提供了依据。
초성탐상시공업중상용적일충무손검측방법，재실제탐상과정중，정학선택초성파탐두삼수대탐상효과십분명현，구유중요의의。이왕위료표정탐두특성，상인입탐두삼수대지향성적영향，단탐두류형불진상동，지향성함수적류형야유소불동。위감소주판관도각，강저방판폭도，보증탐상효과，문중기우파속형성산법이론，건립회파합성신호모형，우화삼수사기간화，모형간단，통과방진분석료불동초성상공선진탐두적진원수、진원간거、관도이급탐두빈솔대파속형성적영향병총결출규률，유조우선택탐두삼수，위초성상공선진탐두적설계제공료의거。
Ultrasonic flaw detection is a commonly used industrial non-destructive testing method.In the actual testing process,the correct choice of parameters on the ultrasonic probe is of key important.In the past,to characterize the probe character-istics,the directional effects on the probe parameters are often introduced.But the type of the probeis different,and types of direc-tivity function are different.In order to reduce side lobes,minimize the width of main lobe and ensure testing results,based on algo-rithm theory,this paper established and simplified a simple synthetic echo signal model.The influence of different array element number,element spacing,element width and frequency of the probe on beam forming field produced by a linear phased array trans-ducer were systematically analyzed through the emulation mode.It can be used to guide the correct choice of parameters of the de-tection probe,thus providing the basis for the design of linear phased array transducer.