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为了研究木材在温、湿度变化条件下的机械吸湿蠕变特性及其影响因素,研制出可施加一定范围内的恒力的木材蠕变仪。该仪器采用精密称重传感器作为测力敏感元件,红外激光位移传感器作为蠕变变形测量元件,五相步进电机作动力,并通过RS232串口线与电脑配合使用。通过对步进电机的性能以及实验要求的分析,选取合适的电机应用在实验中。该电机具有高精度,易控制的特点,实验数据也可为相关实验实现自动化控制奠定的良好的基础。
In order to study the mechanical hygroscopic creep characteristics of wood under temperature and humidity changes and its influencing factors, a wood creep gauge that can exert constant force within a certain range was developed. The instrument uses a precision load cell as a load-sensing element, infrared laser displacement sensor as a creep deformation measuring element, five-phase stepper motor power, and through the use of RS232 serial line with the computer. Through the performance of the stepper motor and the analysis of experimental requirements, select the appropriate motor used in the experiment. The motor has the characteristics of high precision and easy control, and the experimental data can also provide a good foundation for the related experiment to realize automatic control.