【摘要】 介绍了用单片机自动测量转动农机具的转速及自动控制液压系统中伺服变量轴向柱塞泵（以下简称变量系）的工作，直到控制其转速快慢的硬件电路及单片机软件控制程序框图。更多还原

【Abstract】 This paper introduces from automotic tcsting rotary spccd of rotary implcmcnt tool andwork of servo variable-capacity axial-plunger pump (bricfly namcd variablc-capacity pump) in theautomatic control hydraulic system to hardwarc circnit of controling thcir fast or slow of rotary spced andcontrol program flowchart of single chip microcomputcr software with singlc chip microcomputer.更多还原