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该产品系一种非金属材料,如混凝土、耐火材料、岩石等超声控制中所用的换能器,频率约50KH_z～200KH_z,结构新颖,灵敏度高,抗干扰好,信噪比高.这种换能器为一组合排阵结构,由发射探头中间的孔内发射,增强换能器指向性,提高信噪比.这种换能器是可逆的,可以互换.另外,选择了低Q值机电转换系数大的压电材料,并且在压电材料前后进行阻抗匹配使其到达一定带宽,获得一二周期信号的波形,应用于检测厚度在35cm以内的混凝土可获得较好的反射波.这种换能器可适用于反射波超声控制,例如检测混凝土厚度内部缺陷、检测高炉耐火材料厚度以及巷道喷射混凝土厚度检测等.实施时需电子测量设备,利用一
The product is a non-metallic materials, such as concrete, refractory, rock and other ultrasonic transducers used in the transducer, the frequency of about 50KH_z ~ 200KH_z, new structure, high sensitivity, good anti-interference, high signal to noise ratio. The transducer is a combined array structure, which is emitted by the hole in the middle of the transmitting probe to enhance the directivity of the transducer and improve the signal-to-noise ratio. The transducer is reversible and interchangeable. In addition, Piezoelectric material with large electromechanical conversion coefficient and impedance matching before and after the piezoelectric material to reach a certain bandwidth to obtain the waveform of the one or two period signal, which can be used to detect the reflected wave in concrete with a thickness of less than 35 cm. The transducer can be applied to the ultrasonic control of reflected waves, for example, detecting the internal defects of concrete thickness, detecting the thickness of refractory in blast furnace and detecting the thickness of shotcrete in roadway, etc. The implementation requires electronic measuring equipment,