管道内钢珠运动测量装置的设计与实现

设计通过自制涡流传感器作为管道内钢珠的检测元件,用漆包线绕制20mm左右的电感套在管道上,电感通过导线连接到涡流传感器电路,该电路由LC振荡、高频放大、检波电路及低频放大器构成,能够灵敏捕捉到钢珠的滚动,以及多个钢珠一次性倒入的信号,该信号通过专用比较器LM339整形输出脉冲波送到单片机。通过单片机控制分别在两个传感器间距较大时完成了钢珠的累计,运动方向的控制以及角度的显示。

A self-made eddy current sensor is designed to detect steel balls in pipes.The inductance is wrapped around a 20 mm enameled wire on the pipe.The inductance is connected to the eddy current sensor circuit through the wire.The circuit consists of LC oscillation,high frequency amplification,detection circuit and low frequency amplifier,which can sensitively capture the rolling of steel balls.The signal is sent to the single-chip computer through the special comparator LM339 shaping output pulse wave.The accumulation of steel balls,the control of movement direction and the display of angle are completed by single chip microcomputer control when the distance between the two sensors is large.