电子束选区熔化增材制造多点同步测温系统

Multi-Point Synchronous Temperature Measurement System for Electron Beam Selective Melting Additive Manufacturing

摘要: 针对电子束选区熔化增材制造过程中扫描速度及温度变化快的特点，设计了一种多点同步测温系统。选取K型热电偶、PIC18F26K80单片机设计了温度采集模块，通过ADM2587E构建了多个温度采集模块与上位机之间的RS-485通信网络，采用LabVIEW软件设计了上位机软件。基于模块化设计、独立单片机A/D转换、RS-485组网和上位机广播命令等技术实现了多点同步温度采集，同步采集误差不高于0.28 μs。试验测试表明，该系统能够实现9点同步测温，满足电子束增材制造过程中多点、高速、同步采集的要求。

Abstract: Aiming at the characteristics of fast scanning speed and temperature change during the additive manufacturing process of electron beam selective melting, a multipoint simultaneous temperature measurement system was designed. The K-type thermocouple and PIC18F26K80 microcontroller were selected to design the temperature acquisition module, the RS-485 communication network between multiple temperature acquisition modules and the host computer was constructed by ADM2587E, and the host computer software was designed by Lab-VIEW software. Based on the modular design, independent microcontroller A/D conversion, RS-485 networking and host computer broadcasting commands and other technologies to achieve multipoint synchronous temperature acquisition, synchronous acquisition deviation time does not exceed 0.28 μs. Experimental tests show that the system can achieve 9-point synchronous temperature measurement, to meet the requirements of the e-beam additive manufacturing process of multipoint, highspeed synchronous acquisition.