积分式仪表常数自检功能的设计与研究

Research and Design of Constant Self-Test Function for Integral Meter

积分式计量仪表的常数的正确与否,直接影响到该产品能否被验收或投入使用。该文以目前大批生产的电能计量仪表为研究对象,利用产品现有的硬件和软件配置,在电能表产品上增设仪表常数自检功能,即验证电能表内部配置的常数值、测试输出脉冲驱动因子和电子计度器进位驱动因子的正确性。电能表配置仪表常数自检功能,液晶屏的数字区被切换为连续的电能量累加显示与仪表输出(光或电)脉冲同步的脉冲累加计数显示,分别用作自检操作前的参数显示、自检过程显示和自检结果的显示。利用电能表表盖上的本地的功能按钮或红外遥控器上的控制按钮,实现电能表产品仪表常数自检功能切换、参数设置、程序的启动和停止。具有仪表常数自检功能的电能表,常数测试操作简单、测试时间少且无测试误差,提高常数检验结果的可信度。

The correctness of the constant for integral measuring instrument directly affects whether the product canbe approved or put into use. Taking the mass-produced electric energy meters as the research subject, the paperadds constant self-test function to the electric energy meter based on existing hardware and software configuration ofthe product. The instrument constant test is to verify the internal configuration of the constant value for the electricenergy meter and correctness of output pulse driving factor and electronic meter carry driving factor. The constantself-test function is configured for the electric energy meter, where the digital LCD screen toggles between thecontinuous display of electric energy accumulation and pulse accumulation counting display synchronized withinstrument output （optical or electrical） pulse. The screen is used for parameter display before the self-test, processdisplay of the self-test and result display of the self-test. The local function button on the cover of the electricenergy meter or the control button on the infrared remote controller are used to realize constant self-test functionswitching, parameters setting, and program start and stop function of the electric energy meter product. The meterwith the instrument constant self-test function has the advantages of simple operation, less test time, test error free,and improved reliability for the constant test.