摘要
利用发动机排气压力瞬间增大减小和转速的比例关系,采集发动机排气压力的频率信号,并将压力信号转为电信号传递至信号处理器转换成数字脉冲信号,再传递至中央处理器,根据数字脉冲信号计算并通过显示器显示转速数值。这种测速仪可以避免外界因素对于检测结果的影响,既可用于发动机生产线检测,又方便用于专门的道路汽车速度测试。
Using relationship between the change of the instant exhaust pressure of the engine and speed, the frequency signal of the engine exhaust was collected and transited into electrical signal, which was delivered to signal processor and converted into digital pulse signal, then transferred to the center processor. Based on the pulse signal, the speed was calculated in the center processor and showed on the display. This instrument can be used on engine production line for testing, and in the special testing of road vehicles＇ velocity as well.
出处
《农业装备与车辆工程》
2009年第7期58-60,68,共4页
Agricultural Equipment & Vehicle Engineering
关键词
发动机
排气压力
测量
转速
engine
exhaust pressure
measure
evolution
