一、前言由于汽车发动机散热量的增加,风扇和散热器趋向大型化。为降低风扇的噪音和汽车空气阻力等,有必要对发动机的冷却通风系统予以研究和评价。为此,首先必须能正确而迅速地检测汽车在各种行驶状态下通过散热器的风量、风速、温度分布情况。表1为满足这些要求的风速计的性能和适应性方面的评价。由此可见,热电偶式传感器的适应性较强。此外, First, the foreword Due to the increase of automobile engine heat, fans and radiators tend to be large-scale. In order to reduce fan noise and air resistance, it is necessary to study and evaluate the engine cooling ventilation system. To this end, first of all must be able to correctly and quickly detect the car in a variety of driving conditions through the radiator air volume, wind speed, temperature distribution. Table 1 is to evaluate the performance and adaptability of the anemometer to meet these requirements. This shows that thermocouple sensors adaptability. In addition,