The fault diagnosis of differential pressure transmitters in actual application 差压变送器在实际应用中的故障诊断成分(偏差)变送器
Differential pressure remote water gauge should have pressure supplement function to ensure an actual indication of water line in the bubbles under all kinds of working circumstances. 差压式远传水位表应具有压力补偿功能,以保证各种工况下都能显示汽包中真实水位的变化。
The high-precision pressure test meter has the very high measuring accuracy and the linearity. Through measured the differential pressure may calculate the mineral water pump accurately actual lifting. 高精度压差测量仪具有很高的测量精度和线性度,通过所测压差可以准确地计算出水泵的实际扬程。
And then draws a conclusion that speed differential is the most important factor to affect travel safety. But the actual speed control method only considers the design speed. 研究显示速度差是影响高速公路行车安全的重要因素,而现行速度控制方法主要考虑设计速度因素。
The quartic classical Roger-Kutta numerical differential method, which has better precision in calculation, is used to solve the ordinary differential equation combined with actual cooling condition. 其中,采用精度较高的四阶经典龙格-库塔数值微分方法,并结合具体的冷却条件,对模型的常微分核心控制方程来进行数值计算。
Some special solutions derived from differential equations are discussed in greater detail and thereafter formulas approaching the actual movements of pump valves are given in this paper. 本文对解微分方程法得到的几个特解进行了较为详细的讨论,从而给出了更接近实际情况的泵阀运动今式,提出了一些新看法。
According to wiring theory of transformer differential protection, Using phasor quantity type to analyze the reason causing transformer differential protection incorrect operation, and discussing combined the actual differential protection fault. 根据变压器差动保护的接线原理,运用相量的形式对造成变压器差动保护不正确动作的原因进行了分析,并结合实际工作中差动保护故障进行论述。
Considering the pitch deviation, pitch accumulative deviation, flank angle deviation and their combined influence on the pitch diameter, the authors present a complete differential optimal approximate model in this paper and use the ideal thread to approximate the actual thread radially and axially. 本文建立的螺纹中径当量全微分优化逼近模型,考虑了螺距偏差、螺距累积偏差和半角偏差本身及其相互间对中径的综合影响,并用理想螺纹在径向和轴向二维逼近实际螺纹。
Arranging velocity and acceleration sensors simultaneously in the same station, in the identical round of holes, under the condition of the same sample frequency, the differential values of velocities should tally with the actual measurement values of acceleration or be in the range of allowable error. 在同一测点同时布置了速度和加速度传感器,在同一炮次中,在同样的采样频率情况下,速度值求导应该与实测加速度相吻合或在误差允许范围内。
This article discusses the method and accuracy for header differential steel nozzle fillet magnetic particle inspection, and shows the actual dissection result that the author did on products. 对集箱异种钢管接头角焊缝磁粉探伤的方法和准确性进行了探讨,并在产品上进行了实物解剖验证。
The correction difficulty of environmental temperature, uncertainty and randomness of additional differential pressure of measurement, unstability of actual measurement, easy to drift by big margin and frequent check of zero position etc. problems of differential pressure water level gauge were analyzed. 分析差压水位计环境温度修正难点、测量附加差压的不确定性和随机性、实测不稳定、易大幅度漂移、0位必须频繁核对等问题。
The unstability of differential pressure water level gauge affects the full-process commissioning of protection with more problems in actual drive check of protection. 差压水位计的测量不稳定性影响保护全过程投入,保护实际传动校验问题多。
Analysis of Difference between Differential Values of Velocities of Blasting Vibration and Actual Measurement Values of Accelerations 爆破震动速度微分与实测加速度的差异分析
The measuring value correcting formula of differential pressure type gas flow-meter is based on the law of constant mass, if the corrected result of measuring value is equal to its actual gas mass through a throttling unit whether it is volumetric flow or mass flow. 差压式流量计示值修正公式是建立在质量守恒定理基础上的,即不论是气体体积流量还是气体质量流量其示值修正结果应与流过节流装置的实际气体质量相等。
During the using of the differential pressure type flow measuring system, the measurement data have errors, because the design working parameters deviate the actual parameters. However, the service engineers always neglect these errors. 差压式流量检测系统在实际使用过程中,由于设计工况参数偏离实际工况参数会导致测量数据出现比较大的误差,而此误差易被维护人员忽视。
Results and discussions: The control of scale, integration, differential control, named PID adjustment, is most widespread application in actual regulator. 结果与讨论:实际中采用应用最为广泛的调节器控制规律为比例、积分、微分控制,简称PID调节。
Thereby when the foundation soil is comparatively soft and feeble or upper structure is sensitive to differential settlement, the conventional analysis method above-mentioned will violate much in contrast to actual engineering state. 因此,当地基软弱、结构物对不均匀沉降敏感时,上述常规分析方法就与实际情况的差别就很显著了。
So, the research in electric drive control about this kind of bridge-type crab bucket ship unloader of electricity and differential drive have extensive actual using value. 因此,关于这种电差动式抓斗卸船机的电气驱动控制的研究,具有广泛的实际应用价值。
This paper analyzes working principle and deficiency of bus coupler current differential protection, proposes perfect measures through adding compound voltage back-up protection, it has actual significance for improving system reliability and economy. 分析了母联电流比相式差动保护的工作原理及保护的不足,并提出了增设复压动作后备保护的完善措施,对提高系统运行的可靠性和经济性具有实际意义。
With the development of applied mathematics and promotion of relevant branch of learning, partial differential equation is an important bridge between mathematics theory and actual application. 随着应用数学的发展以及相关学科的推动,偏微分方程成为数学理论与实际应用的一座重要桥梁。
Differential equations arise from the development of production practice and scientific technology, and have a profound actual background, as modern science and technology the indispensable tool for solving problems. 微分方程是在科学技术和生产实践的发展中产生的,拥有深刻的实际背景,是现代科学技术中不可或缺的解决问题的工具之一。
The same time, combined with the differential pricing strategy in conjunction with the combination of pricing, pricing to match with the actual situation of each region, minimize affordability students caused by the loss. 同时,结合差别定价与组合定价结合策略,使得定价能够与各个区域的实际情况相匹配,最大限度的减少价格承受能力导致的生源流失问题。
According to movement differential equation, the actual motion process of concrete is analyzed in transporting pipe. 根据运动微分方程,分析混凝土拌合料在输料管中的实际运动过程,探讨输送参数对混凝土输送性能的影响。
The Multi-group equivalent energy function method improves the computational efficiency by reducing the number of differential equations as well as makes the n-machine system closer to the actual situation of multiple separating clusters. 多群模式的能量函数法通过减少微分方程的个数来提高计算效率,同时使分群后的系统尽可能地更接近n机系统的实际裂解情况。