短路引燃爆炸性混合物的主要因素有短路火花功率、火花能量和火花脉冲宽度等，但现有本安性能评价方法未充分考虑短路火花脉冲宽度且安全火花试验装置无法对其进行检测。针对上述问题，设计并研制一款应用于本安性能试验的脉冲发生与测控装置，对研究短路放电过程和电源本安性能评价方法具有重要意义和工程应用价值。

通过分析本质安全电路短路放电过程和引燃理论，基于本安性能评价方法的发展现状，指出短路火花脉冲宽度与引燃能力密切相关，可将其引入到本安性能评价方法中。通过分析本安性能试验的应用场合及实际需求，确定了脉冲发生与测控装置的功能及性能指标要求，提出了两级结构的设计方案，前级为DC-DC电路，后级为脉冲产生与测控电路，为装置的硬件电路及软件设计奠定基础。在前级电路中，基于UC3842设计了采用电流型反馈控制方式的正激变换器，通过外置DA芯片提供可变基准电压实现前级输出5~50V宽范围连续可调，以满足本安电路不同电压等级要求及为后级电路提供所需电压。在后级电路中，设计了脉冲产生与测控电路，既可产生短路试验所需脉冲，也可对短路火花脉冲宽度进行检测与控制，为研究短路放电引燃机理及本安性能评价方法提供支撑。设计了以DSP控制器为核心的智能控制系统，可实现对脉冲信号的调整和驱动，也保证了检测结果的准确性。为便捷地对装置进行操作，设计了基于智能串口屏的人机交互模块，实现了各短路试验参数的输入与输出。针对软硬件造成的检测误差，提出了一种误差补偿方法，提高了检测结果的准确性。

研制了基于本安性能试验的脉冲发生与测控装置，对其进行实验测试，结果表明：装置前级电路的负载调整率和纹波电压等特性均符合设计要求；后级电路可实现脉冲产生及火花脉宽的检测与控制。实验结果验证了所提出方案的可行性及设计方法的正确性。

The factors for short-circuit ignition of explosive mixtures include short-circuit spark power, spark energy and spark pulse width, etc. However, the existing intrinsic safety performance evaluation method does not fully consider the short-circuit spark pulse width and the safety spark test device cannot detect it. For the issue above, this paper designs and develops a pulse generation and pulse detection control device for intrinsic safety performance test, which has important significance and application value for the study of short-circuit discharge process and the evaluation method of power supply intrinsic safety performance.

Based on the analysis of the short-circuit discharge process and ignition theory of intrinsically safe circuits, understand the development status of intrinsic safety performance evaluation methods, it is pointed out that the short-circuit spark pulse width is closely related to the ignition ability, which can be introduced into the intrinsic safety performance evaluation method. By analyzing the application occasions and actual requirements of intrinsic safety performance test, the function and performance index requirements of the pulse generation and measurement and control device are determined, and a two-level structure design scheme is proposed to lay the foundation for the hardware circuit and software design of the device, the front stage is a DC-DC circuit, and the latter stage is a pulse generation and measurement control circuit. In the front-end circuit, a forward converter with current feedback control mode is designed based on UC3842. It provides a variable reference through an external DA chip. The voltage is continuously adjustable in a wide range of 5~50V for the front-end output to meet the requirements of different voltage levels of the intrinsically safe circuit and provide the required voltage for the back-end circuit. In the subsequent circuit, the pulse generation and measurement and control circuit are designed, which can not only generate the pulses required for the short-circuit test, but also detect and control the short-circuit spark pulse width, in order to study the ignition mechanism and the ignition mechanism of the short-circuit discharge. Intrinsically safe performance evaluation methods provide support. An intelligent control system with DSP controller as the core is designed, which can realize the adjustment and drive of the pulse signal, also ensure the accuracy of the detection result. In order to operate the device conveniently, the control of the short-circuit parameters is realized through the intelligent serial port screen , which realizes the input and output of various short-circuit test parameters. Aiming at the detection error problem caused by software and hardware, an error compensation method is proposed to improve the accuracy of the detection result.

A pulse generation and pulse detection control device based on intrinsic safety performance test was developed and tested. The results show that the load regulation rate and ripple voltage of the front-end circuit of the device meet the design requirements; The back-end circuit can achieve pulse generation and detection control of spark pulse width. The experimental results verify the feasibility of the proposed scheme and the correctness of the design method.

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