The heat cured sand of Al-Mg-B compound phosphate inorganic binder was modified by ultrasonic oscillation to binder and adding organic polymer YPPJ while mixing of sand.
采用对所研制的粘结剂进行超声波振荡及混砂时加入有机高聚物yppj对铝镁硼复合磷酸盐铸造粘结剂热硬砂进行改性。
The paper analyzes the influence of incidence and oscillation frequency of ultrasonic sensor on measuring accuracy and the choose principle of ultrasonic sensor is presented.
文中以时差法为例，分析了超声波换能器中超声射线入射角及振荡频率对测量精度的影响，给出了换能器的选择原则。
This paper analyzes the influence of incidence and oscillation frequency of ultrasonic sensor on measuring accuracy. The option principle of ultrasonic sensor is presented.
以时差法为例，分析了超声波探头中超声射线入射角及振荡频率对测量精度的影响，给出了探头的选择原则。
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