故障检测

Finally, the feasibility and applicability of the designed system was verified by practical particleboard hot-pressing experiment. The development of the Automatic measurement system for monitoring the internal-mat environment was based on LabVIEW program which is a powerful virtual instrument design workbench. Developed system in this paper can provide a friendly interface, an animated process-monitoring window including a real-time data acquisition of 2 pressure signal channels and 4 temperature signal channels, as well as the asynchronous serial communication between measuring computer and the data acquisition. Practical application testing and data analysis showed that this measuring system was useful and easy to operate by providing accurate and reliable data.

本文详尽介绍了人造板热压过程中板坯内部环境检测系统各组成部分的工作原理以及它们在系统中的作用，着重阐述了系统硬件设计和检测软件的开发，并通过刨花板的热压试验，验证了系统设计可行性和先进应用虚拟仪器系统开发平台-LabVIEW 编制了热压板坯内部环境自动检测系统的应用软件，该软件具有友好的人机交互界面、简单直观的：工艺流程监控、安全可靠的故障处理措施等优点。

To solve the problem of remote diagnosing faults for high-automatic long-period minute machines in their running period, the VPON remote monitoring system and image processing technology are used to carry out the remote diagnosis of FDM rapid prototyping machine breaking-down fault.

针对长时间持续作业、无人职守的精密机械装置的运行状态和故障的远程诊断问题，以FDM快速成型机为对象，采用VPON远程监视系统和图像处理技术，实现了快速成型机运行状态与停动故障的远程检测和诊断。

These new methods adopt the circuit information contained in the power supply line current to realize the fault diagnosis.

这些检测技术是从电路电源线中的电流信号中提取电路的故障信息实现故障诊断。

Based on the analysis, we proposed an efficient deducible fault-finding method which could not only diagnose and repair the failures but also find out the relative branches influenced by the faults.

在增加Petri网标识的冗余度基础上，通过构造监督矩阵和冗余矩阵，提出了具有自校正能力的Petri网模型；给出了Petri网有效的递推寻错法，该方法不仅能够检测和纠正Petri网中出现的故障，而且可以给出实际对象网络中与故障相关的进程；利用不间断电源的Petri网模型验证了递推寻错法的正确性以及在实际应用中的可行性

Further, the sufficient and necessary conditions of fault detectability in the principal component space and residual space are presented respectively.

采用故障临界幅值的概念对故障在MPCA下的被检测行为进行了分析，并给出了一种新的主元确定方法。

So it is of great importance to detect the signal discontinuity.

在故障诊断中，故障通常表现为输出信号发生突变，因而对突变点的检测有非常重要的意义。

The main contents of spectrometric analysis and ferrographic analysis technique,and its application in condition monitoring of dredger diesel engine were discussed.

分析研究了光、铁谱分析技术的主要内容及其在挖泥船柴油机状态监测中的作用，阐述了光、铁谱分析技术用于柴油机故障诊断的依据和理论基础，重点研究了经济、有效的油液铁谱分析技术、油液光谱分析技术在柴油机状态检测与故障诊断中的应用方法。

According to the vibration signal features of frequency-domain, energy eigenvector was established by means of wavelet packet.

试验结果表明，系统不仅能够检测到轴承故障的存在，而且能够比较准确地识别轴承的故障模式。

The outstanding of this study is: for system hardware design, a new voltage measuring circuit, which is used to measure the voltage of the individual battery of batteries is designed; for the functions of the new instrument, it is used to monitor the battery on-linely and real-timely not only when the battery is on floating charging but also on the course of charging and discharging with the new judging criterion of battery performance. Even more, the battery, which is good in floating charging and actually may be bad, could be found quickly by discharging for a short time periodically. The precision, automation and intelligence of the monitoring system for battery is improved greatly.

本论文工作的突出之处：在系统硬件设计方面采用了一种新的测量蓄电池组中单体电池电压的采样电路；在系统功能方面，不仅实现了对蓄电池浮充状态的实时在线检测，而且通过采用蓄电池组的均匀性判断标准实现了对蓄电池充、放电的动态过程中的性能状态实时在线检测诊断，还可以通过定期短时间放电的方法实现对蓄电池性能的快速判断，及时发现浮充状态时检测状况正常但实际己经存在故障的落后电池，极大的提高了对蓄电池检测的准确性、自动化和智能化程度。

If the XLPE cable on-line monitoring system, which is based on the method of superposing a low DC voltage on the neutral point of PT ,is used in 6-35 kV power system, the way of grounding of potential transformers and the shielding layer of cable must be changed.

PE电缆在线检测系统应用于6～35 kV中性点不接地系统时，改变了PT中性点和电缆屏蔽层的接地方式，因此必须分析系统正常运行及故障状态下检测装置对电力系统的影响，以评价检测设备的实用性进行讨论。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。