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在一般情况下数据采集系统(包括本文讨论的航空发动机斌车微型机数据采集系统)的最前端是传感器。通过它将压力、温度、推力,流量及转速等物理量转变成电信号送入计算机。在实际使用中,需要事先标定各物理量与电量的关系,并将这个关系曲线存入计算机,测量时再由计算机把采集到的电量换算成对应的物理量。各种传感器的性能往往离散度较大,重复性较差,又易受温度和其它外界条件的影响,这是测量的主要误差来源。采用微型机系统校验传感器,可
Under normal circumstances the data acquisition system (including the aeroengine minicar data acquisition system discussed in this paper) is the front-end sensor. Through it the pressure, temperature, thrust, flow and speed and other physical quantities into electrical signals into the computer. In actual use, you need to calibrate the relationship between the physical quantity and power in advance, and the relationship curve is stored in the computer, measured by the computer to convert the collected power into the corresponding physical quantity. The performance of a variety of sensors are often large dispersion, poor repeatability, but also susceptible to temperature and other external conditions, which is the main source of measurement error. Microcomputer system calibration sensor can be