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Development of a Low Temperature Measurement and Control System for Measuring Liquid Oxygen Density

机译:用于测量液氧密度的低温测控系统的开发

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A low temperature measurement and control system which mainly contains microprocessor has been developed for measuring the density of liquid oxygen. Much more software instead of hardware has been used in the system to realize different kind of functions, for example, calibration of A/D conversion, sensor's data process, PID regulation and the self-modification of its parameters, PWM method to complete the precision control of the heater etc. The temperature sensor is interchangeable and remains its original measurement accuracy. The systems is operated in the form of menu on the screen .A simulation test of the system shows that the measuring accuracy is +-0.1 K at temperature range of 90 to 112 K.
机译:已经开发了主要包含微处理器的低温测量和控制系统,用于测量液氧的密度。系统中使用了更多的软件而不是硬件来实现不同类型的功能,例如,A / D转换的校准,传感器的数据处理,PID调节及其参数的自修改,PWM方法以完成精度温度传感器是可互换的,并保持其原始的测量精度。该系统以屏幕上的菜单形式进行操作。该系统的模拟测试表明,在90至112 K的温度范围内,测量精度为+ -0.1K。

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