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内燃机排气管振动检测-opto

时间:2017-02-27      来源:苏州迪森特      关键词:苏州迪森特      浏览量:3074


当今,优化内燃机效率非常重要,为此需要进行一系列精密检测。其中排气管温度检测可以通过在管道中安装热偶来实现。为了确保热偶安装正确,需要检测管道的振动。本案例遇到的问题是,由于排气管道温度极高,导致热偶散发荧光(成为红点)。传统长波长激光传感器(红光激光传感器)对于红热点的测量存在固有问题,本例采用了短波长的蓝光激光传感器进行振动测量,实现了高精度的测量效果。

Optimizing the processes within an internal combustion engine is becoming increasingly important in this day and age. A whole series of measurements is vital for engine management purposes. The temperature of the exhaust gas is one important source and is recorded using a thermocouple within the manifold.

To check the way it is attached, it is necessary to examine the propensity to vibrate, as well as the mechanical rigidity of the structure. This is an application where the blue laser comes to the fore. The high temperatures in the flow of exhaust gas leads to the thermocouple self-fluorescing (becoming red hot). Due to the short wavelength of the blue-violet laser employed, the light emitted from the thermocouple does not dazzle the sensor, as the long-wavelength intrinsic incandescence is a long way off the 405-nm wavelength of the blue-violet laser, and it is effectively blocked by the high quality interference filters used.

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