文章对JJG 843-2022《泄漏电流测试仪检定规程》中的部分新修订条款和执行过程中遇到的难点及疑问进行了解释和说明,从适用范围、准确度等级、测量网络、泄漏电流示值误差、试验电压示值误差等方面进行阐述,便于计量检定人员加深对该规程的理解,正确执行该规程.

In order to solve the problem of quantitative traceability of detection devices for fire emergency lighting and evacuation indication systems. Method analysis and research were conducted on parameters such as emergency switching time, emergency working time, DC charging voltage, DC discharge voltage, DC charging current, DC discharge current, environmental test temperature, and environmental test humidity. We searched for appropriate calibration methods for the technical characteristics of each parameter and designed a set of calibration devices for fire emergency lighting detectors. The test results show that the technical indicators of the calibration device can meet the traceability requirements of the fire emergency lighting and evacuation indication system.

针对充电桩现场测试设备的充电需求与实际输出不一致,出现电压、电流不匹配的问题,设计了一套检测方案,构建出包括电流检测模块、电压检测模块和示波器检测模块的检测电路,通过采样电压和电流信号,计算出不同负载下充电桩输出电流和电压值,并设计了包括直流电能采集电路,由双通道AD转换AD7380、可编程增益放大器、可编程增益放大器、增益电阻Rg2和电源变换器、低通滤波器电容CL、低通滤波器电阻RL组成的检测电路,在检测电路中,为了提高检测效率,还设置了校正电路.通过试验,本研究方法分析直观,误差低.

重载列车在长大下坡道循环制动时,空气制动的性能差异较大、列车纵向冲动较大,偶发断钩事故,给机车乘务员操作造成极大困难.以LKJ2000机车运行监控装置记录的朔黄铁路数据和相关线路条件为基础,建立重载列车牵引计算模型,对不同制动性能的列车提出相应的优化操作方案.采用理论分析与现场运用需求相结合的研究方法,分析重载列车长大下坡线路操作规程,并基于重载列车空气制动线路的试验数据模型,以50kPa减压量下的空气制动性能为基准,计算不同制动速度下的空气制动等效效率;以具体案例为对象,分析不同操作方案对列车运行速度曲线变化的影响规律,并在此基础上,以列车安全运行、避免停缓为目标,根据制动时的速度变化判断空气制动效率,对列车操作控制策略进行优化.经过大量仿真计算和数据分析,提出"北大牛—原平南"区间不同空气制动操作方案的判断条件,并制定相应的优化操作示意图,为重载列车安全高效地运行提供理论支撑.

By the end of 2022, the civil explosive industry has realized the full use of industrial electronic detonators, which has promoted the upgrading of the electrical parameter tester of industrial electronic detonators. The original calibration method can no longer meet its traceability requirements. According to the working principle of the industrial digital electronic detonator electrical parameter tester, this paper studies the calibration method of the delay time, DC resistance (firing bridge wire resistance), DC current, internal crystal oscillator signal (frequency) and other parameters, simulates and assembles a set of measuring standard device, and analyzes the sources of uncertainty of the industrial digital electronic detonator electrical parameter tester, which is solved the problem of quantity value traceability of industrial digital electronic detonator electrical parameter tester in civil explosive industry.

This paper introduces the design principle and application of time interval measuring instrument.A simple calibration device basing on the powerful data processing ability of single chip microcomputer, has strong data processing capability for time relay is designed Which solves the traceability problem of various types of time relays, and realizes the automatic calibration of time relays, the uncertainty of measurement process is analyzed and studied.Not only be used to calibrate the time relay, but also be used for testing industrial digital electronic detonators and other initiating explosive devices.

In order to solve the problem of measuring and tracing the dynamic line and static line of the wireless intelligent detection line in the assembly line workshop of an enterprise, the on-line measurement method of refrigerator intelligent detection line was studied, and a set of on-line calibration device of refrigerator intelligent detector was established. The test results show that the on-line calibration device of the refrigerator intelligent detector designed in this paper can realize the minimum measuring AC power of 0.5 W and the lowest measuring temperature of -30 (cid:263) . This measurement method solves the real-time online automatic calibration of the refrigerator intelligent testing line, as well as the real-time online measurement supervision of the measured data

DC standard resistance is widely used in precision measurement, verification, traceability and other fields due to its high accuracy and good stability. First-class resistance standard has used to measure it based on the bridge turn equilibrium principle. According to JJF1059.1–2012 Evaluation and expression of uncertainty in measurement, the uncertainty of measurement results has been evaluated on uncertainty of the transfer standard, the basic error, sensitivity, load power, tank temperature, thermoelectric power and staff. This paper analyzes the uncertainty of the measurement results which will useful to measurement uncertainty assessment of standard resistance in future testing work.

针对目前混凝土管片生产过程中主要靠人工实现圆弧曲面抹平的情况,设计一种三轴联动自动抹平设备.根据人工抹平混凝土曲面的方式,利用2个直线轴和1个旋转轴联动实现圆弧曲面的插补运动和刀具角度调节.电气控制系统以GSK25iMb数控系统为核心,运用时间分割插补法进行圆弧插补运算,实现对混凝土管片圆弧曲面的自动抹平.通过UG对圆弧曲面进行路径规划,保证刀轨覆盖整个圆弧表面.进行了现场实验,结果表明:抹平后的混凝土管片表面平滑无凹凸,可达到生产精度要求;该设备极大地提高了混凝土管片的生产效率.

绝缘油介电强度测试仪在高电压行业有着广泛的应用,设备数量多,校验需求大,校验过程危险性大,特别是容易因为误操作造成人身伤害及设备损坏.目前国内缺乏专门为其设计的校验装置,为此特别设计了一款专用的校验装置,通过主动击穿模块、隔离保护模块、采样处理模块,分别在试验过程、安全保护和数据处理三个方面满足客户的校验需求.在保证校验安全的同时,增加对被校设备击穿过程的分析,进一步加强校验的准确性.

在二步法腈纶生产过程中,聚合釜是腈纶生产的关键装置。为了聚合釜开车平稳、高效、安全,本操作是在长期开车试验而总结的聚合釜同步开车法。