By means of computer RS232 interface and corresponding control circiut,the smoke densily of two exhaust ports of locomotive diesel engine can be measured with one smoke indicator.

• 介绍了在机车柴油机性能试验中,通过计算机RS232接口和相应的控制电路实现使用一台烟度计自动完成内燃机车柴油机两个独立排气烟道的取样和烟度的测量。