在分光型红外气体分析器（DIGA）设计原理基础上，建立了基于热释电探测器的红外气体分析系统输入输出数学模型。
The input and output mathematical model of DIGA (Dispersive Infrared Gas Analyzer) system with pyroelectric detector was established according to the design principle of DIGA.
根据对象的输入输出采样数据，用数值计算方法分析热工对象模型的阶次。
Based on the sampled date of the system input and output, the paper presents a method for numerically analysing the system model order.
所有元器件均来自一个品牌，包括真空断路器，空气断路器，电流接触器，热继电器，驱动，可编程控制器，输入输出模块，电站管理系统继电器和仪表，不间断电源，传感器和照明器材。
All of components come from one brand, from vacuum circuit breakers, air circuit breakers, contactors, thermal relays, drives, PLC, I/O, PMS relays and meters, UPS, sensors and lighting fixtures.
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