基于嵌入式wifi和App服务的电力仪表视觉校准系统
2018-11-26刘默耘孙国栋周堡查代凡胡天宇
刘默耘 孙国栋 周堡 查代凡 胡天宇
摘要:电力仪表的准确度在各行各业中一直备受关注,如果因某些原因发生测量不准确的情况,将会造成严重的经济损失,所以对电力仪表的校准有着十分重要的意义。而传统的视觉检测方法因其需要PC机执行算法,故每台相机均需配备电脑,机动性和灵活度较差,且成本高。而以往记录检测数据多采用人工手写,不易调取文件,也无法保证存档的完整性。故本文提出了一种基于嵌入式wifi图像传输的电力仪表视觉校准系统,且开发了App应用,使得检测人员的检测工作更加方便、灵活,也降低了硬件成本,应用性好。
关键词:嵌入式;机器视觉;电表校准;wifi传输;APP服务
中图分类号:TM933 文献标识码:A 文章编号:1009-3044(2018)22-0296-02
Abstract:The accuracy of power meters has always been a concern in all walks of life. If inaccurate measurements occur for some reason, serious economic losses will occur. Therefore, calibration of power meters is of great significance. The traditional visual inspection method requires the PC to execute the algorithm. Therefore, each camera must be equipped with a computer, which has poor mobility and flexibility, and the cost is high. In the past, recording test data mostly used manual handwriting, which made it difficult to retrieve files and ensured the integrity of the files. Therefore, in this paper a visual calibration system of power meters is proposed based on embedded wifi image transmission, and App application is developed, which makes the inspection personnel's detection work more convenient and flexible. It also reduces hardware costs and has good applicability.
Key words: embedded; machine vison; meter calibration; wifi transmission; APP service
1 背景
近年來,电力仪表在电力互感电压、电流测量中得到了快速发展和广泛应用。电力仪表在使用一段时间后,由于磨损、材料、线路老化等因素的影响,其技术特性将发生变化,从而影响测量的准确度,因此电力仪表校验对工程安全运行、及时查出隐患、掌握运行状况有着重要意义。国家规定必须对使用中或修理后的电力仪表进行定期校验,其目的是测定被校验仪表在规定工作条件下,准确度是否达到标定值。
传统视觉方法一般要求每套检测相机都配备一台PC实施图像处理[1],若需在一定区域范围内测量多个处于不同位置的电力仪表时就十分的费时费力,且获得的检测报表无法随时调取查看,只能存档于手写报表中或某个PC端。……
