一九八一年我们曾设计制造了具有数字显示的受电弓试验台,虽测试的准确性、直观性、方便性大大提高,但七种特性数据仍需手工抄写。一九八八年我们又设计并制造出具有自动记录装置的受电弓特性试验台,准确测试力与高度的变化关系并可自动记录出力与高度的函数关系,其准确度和自动化程度较高,测试结果一目了然。同时为满足 In 1981, we designed and manufactured the pantograph with digital display. Although the accuracy, visualization and convenience of the test are greatly improved, the seven kinds of characteristic data still need to be hand-copied. In 1988, we also designed and manufactured the pantograph test bed with automatic recording device to accurately test the relationship between force and height and automatically record the function of force and height with high accuracy and high degree of automation Test results at a glance. At the same time to meet