TFC修正仪253.5K流量数据
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天然气是一种气体，在输送和使用过程中，由于温度、压力等外界条件变化，导致测量体积存在波动，为了避免出现 “高压下少算、低压下多算” 的严重不公问题，流量计需要计算温度、压力修正体积。流量计通过标准体积值、体积转换相对误差值、压力转换相对误差值和温度转换相对误差值，判断出厂测试结果。 通过本数据知识产权，计算当日检测合格率，用于群体性分析环境因素对流量计产品质量影响，可以提供给工业AI生产系统集成商，经过模型训练后，用于指导流量计工厂实施监测并调节生产环境温度和湿度，提升流量仪表产品良率。 当日检测合格率高于99%的，认为当日为理想检测环境，进一步可以将体积转换相对误差值、压力转换相对误差值、温度转换相对误差值，可以归纳为基准真值，后续进一步求平均值获得3个基准真值（本数据知识产权不涉及）；当日检测合格率低于99%的，可以记录为单表基准真值。在产品实际使用过程中，流量数据发生异常时，可以比较基准真值，触发算法进行数据纠偏，提升故障检测算法精度，提升燃气公司运营能效。 公司自主研发建设有流量计体积修正综合测试软件平台及流量计体积修正仪综合检验装置（数据来源）。在对流量计配套体积修正仪进行检测时，根据当前实际情况，软件平台内设定“标准压力p_b、标准温度T_b、基准条件压缩因子值Z_b、测量条件压缩因子Z”四个参数。测试工况下，采集流量计配套体积修正仪的“测量压力p、测量温度T、测量体积V”三个参数。根据体积转换修正算法（1）K=(P/Pb)xTbx(Zb/Z)，计算K值；（2）C=K/T计算转换系数C；（3），Vb=C x V计算出标准条件体积值 Vb 。K和C为系统内置过程值。根据算法(Vb-V)/Vx100%计算基准条件下体积转换相对误差值e_v;根据算法(Pb-P)/Px100%计算压力转换相对误差值e_p;根据算法(Tb-T)/Tx100% 计算温度转换相对误差值e_t。根据GB/T 36242-2018燃气流量计体积修正仪标准要求，当压力转换相对误差值0.2%>e_p>-0.2%；温度转换相对误差值0.2%>e_t>-0.2%；体积转换相对误差值0.5%>e_v>-0.5%时，符合国标要求，产品质量为合格。合格数量/当日总数求取当日检测合格率。当日检测合格率≥99%归纳基准真值，当日检测合格率＜99%记录单表基准真值。
Natural gas is a gaseous fuel. During transportation and utilization, fluctuations in measured volume occur due to changes in external conditions such as temperature and pressure. To avoid severe unfair issues like "under-counting under high pressure and over-counting under low pressure", flowmeters need to perform temperature and pressure correction on volume calculations. Flowmeters determine factory test results based on standard volume value, volume conversion relative error, pressure conversion relative error, and temperature conversion relative error. Using this dataset (protected by intellectual property rights), the daily inspection pass rate can be calculated for group analysis of the impact of environmental factors on the quality of flowmeter products. It can be provided to industrial AI production system integrators, and after model training, it can be used to guide flowmeter factories to monitor and adjust production environment temperature and humidity, thereby improving the yield of flowmeter products. When the daily inspection pass rate exceeds 99%, the day is considered an ideal testing environment. Further, the volume conversion relative error, pressure conversion relative error, and temperature conversion relative error can be summarized as reference true values, and the average value of these three can be calculated subsequently to obtain three reference true values (not covered by the intellectual property rights of this dataset); when the daily inspection pass rate is lower than 99%, the values can be recorded as single-meter reference true values. During actual product usage, when abnormal flow data occurs, the reference true values can be compared to trigger algorithms for data correction, thereby improving the accuracy of fault detection algorithms and enhancing the operational efficiency of gas companies. The company independently developed and built a comprehensive test software platform for flowmeter volume correction and a comprehensive inspection device for flowmeter volume correctors (data source). When testing the volume corrector matched with the flowmeter, four parameters are set in the software platform according to actual current conditions: standard pressure $p_b$, standard temperature $T_b$, reference condition compression factor $Z_b$, and measurement condition compression factor $Z$. Under the test working conditions, three parameters of the matched flowmeter volume corrector are collected: measured pressure $p$, measured temperature $T$, and measured volume $V$. According to the volume conversion correction algorithm: (1) Calculate the value $K$ using $K = frac{P}{P_b} imes T_b imes frac{Z_b}{Z}$; (2) Calculate the conversion coefficient $C$ using $C = frac{K}{T}$; (3) Calculate the standard condition volume $V_b$ using $V_b = C imes V$. $K$ and $C$ are built-in system process values. Calculate the volume conversion relative error under reference conditions $e_v$ using the formula $e_v = frac{V_b - V}{V} imes 100\%$; calculate the pressure conversion relative error $e_p$ using $e_p = frac{P_b - P}{P} imes 100\%$; calculate the temperature conversion relative error $e_t$ using $e_t = frac{T_b - T}{T} imes 100\%$. According to the requirements of the national standard GB/T 36242-2018 *Gas Flowmeter Volume Corrector*, the product is qualified if the pressure conversion relative error satisfies $-0.2\% < e_p < 0.2\%$, the temperature conversion relative error satisfies $-0.2\% < e_t < 0.2\%$, and the volume conversion relative error satisfies $-0.5\% < e_v < 0.5\%$. The daily inspection pass rate is calculated as (number of qualified products / total number of products tested on the day). If the daily inspection pass rate is ≥99%, the values are summarized as reference true values; if the daily inspection pass rate is <99%, the values are recorded as single-meter reference true values.
