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针对锻压现场强振动、高温度、多粉尘的特点,提出了一种基于电涡流位移传感器的锤头位移检测方案,以解决锻件尺寸在线监控的问题。该方案在锤头侧面垂直方向上加工出等距凹槽作为刻度标尺,电涡流传感器探头安装在机架上且正对凹槽刻度标尺的位置,通过采集锤头运动过程中传感器输出电压信号的动态数据计算锤头位移。在设计过程中,首先采用有限元软件对该方案进行仿真研究,通过分析凹槽刻度标尺表面磁场特征,确立了方案的可行性;其次,采用金属板材加工凹槽刻度标尺进行实验,建立位移测量数学模型。实验结果表明,该方案可行且具有较高的测量精度。
Aiming at the characteristics of strong vibration, high temperature and dust in forging field, a scheme of hammer displacement detection based on eddy current displacement sensor is proposed to solve the problem of online monitoring of forging size. The program in the vertical direction of the hammer side of the processing of the equidistant groove as a scale ruler, eddy current sensor probe mounted on the rack and the groove scale ruler position, through the acquisition of the hammer movement of the sensor output voltage signal Dynamic data to calculate hammerhead displacement. In the process of design, the finite element software is firstly used to simulate the scheme. By analyzing the characteristics of the magnetic field on the surface of the groove scale, the feasibility of the scheme is established. Secondly, the experiment is carried out by using the grooved scale of metal plate processing to establish the displacement measurement mathematical model. Experimental results show that the scheme is feasible and has high measurement accuracy.