柴油机电喷系统中高精度频率计的设计

Design of a High Accuracy Cymometer in Eectronic Fuel lnjection Systems of Diesel Engines

介绍了电喷系统中高精度频率计电路的设计原理。对频率计中存在的±1个字误差产生的原因进行了分析,并提出了解决的方案,可实现精确度很高的测频。硬件系统功能通过I/O接口板实现,可由微机进行实时监控。

The paper introduces the designing principle of the circuit of a high accuracy cymometer which is one of the key components of electronic fuel injection systems. By analyses of the error in the cymometer, a program is put forward, which can measure frequency with high accuracy. The function of hardware is actualized by I/O board, which can be monitored by computers in real time.