摘要:
针对目前煤矿普遍存在的“信息孤岛”问题，从实践角度出发，提出一种基于资源模型和受限应用协议（CoAP）的智慧矿山信息交互方法。分析了实现信息交互要解决的2个关键问题：数据建模和表示问题，即信息源如何展示自己能提供的信息和服务；交互协议问题，即信息消费者和生产者之间如何通信。针对数据建模和表示问题，定义了一种资源模型，通过资源模型定义文件可获取传感器提供的信息、对应的操作权限和数据类型等。针对交互协议问题，分析对比了声明式协议和命令式协议的特点，并选用更符合煤矿物联网开放性和易扩展性需求的CoAP作为信息交互协议。实验结果表明，该方法可在保持接口稳定的基础上，通过选项和资源提高灵活性，能够方便快速地实现创建、查询、修改、删除、通知等信息交互操作；只需对现有设备软件进行修改即可实现统一的信息交互，为实现智慧矿山打下基础。
Abstract:
In view of "information island" problem which is common in coal mines, a smart mine information interaction method based on resource model and constrained application protocol (CoAP) was proposed from practical point of view. Two key issues to be solved in realizing information interaction are analyzed: data modeling and presentation issue, that is, how information sources display the information and services they can provide; interaction protocol issue, that is, how to communicate between information consumers and producers. For the data modeling and representation issue, a resource model is defined, and the information provided by sensors,corresponding operation authorities and data types can be obtained through resource model definition file. For the interactive protocol issue, the characteristics of declarative protocol and imperative protocol are analyzed and compared, and CoAP is selected as the information interaction protocol which is more in line with the openness and expansibility requirements of coal mine Internet of things. Experimental results show that the method can increase flexibility through options and resources on the basis of maintaining the stability of the interfaces, and can easily and quickly implement information interaction operations such as creation, query, modification, deletion and notification; unified information interaction can be easily achieved by modifing existing equipments software, which lays a foundation for realization of smart mine.
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