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泄漏噪声     
相关语句
  leak noise
     the relationship between the level of the intensity of the leak noise and the capability of boiler;
     泄漏噪声声强级与锅炉容量的关系; 泄漏噪声声强级与泄漏孔径的关系;
短句来源
     the effect that wave-guide tube has on the detection of leak noise;
     波导管对泄漏噪声测量的影响;
短句来源
     Main goal of these kind of equipments is to collect and analyze the background noise , the laxity noise of device , mechanical shake noise, neutron noise, the leak noise of pressure accompanied with the nuclear power facilities.
     这类设备的主要任务是收集和分析核设备运行时的背景噪声,设备松动噪声,机械振动噪声,中子噪声,压力泄漏噪声
短句来源
  breakout noise
     Based on the assumption of Nelson and Morfey that there is a constant of proportionality between the fluctuating drag force and the steady state drag force acting on an in-duct element, a pressure-based technique is proposed for estimating the breakout noise due to the vibration of the duct wall caused by the interaction of the turbulent flow and the in-duct elements.
     根据Nelson与Morfey的设定,在流体质元所受波动阻力和稳态阻力之比恒定的条件下,文中推广了一种基于气压值的计算方法,用来推算由管道内部因素与湍流作用所引起的管道壁泄漏噪声之声强级。
短句来源
  leakage noise
     This thesis introduces the development, application and hardware structure of pressure-carrying heating Pipe in boiler, mathematical physical model of boiler leakage noise, and presents operation examples of leakage detection system.
     介绍锅炉承压受热管泄漏在纽监测系统的研制、应用、硬件构成、锅炉泄漏噪声的数学物理模型,给出了泄漏监测系统的运行实例。
短句来源
     5. The leakage noise signal and the background noise signal obtained from the sensors installed in boilers are processed. Finite Impulse Response (FIR) digital filter and spectral analysis approaches, including Periodogram method and Burg method, are adopted to differentiate leakage noise from background noise.
     5、 对所接收的泄漏噪声信号和背景噪声信号进行了处理,在信号处理过程中采用了有限长单位冲激响应(FIR)数字滤波器来进行滤波,采用了周期图法和参数模型法中的Burg法对噪声信号作频谱分析,并比较了两种方法的不同;
短句来源
     6. The hardware devices of acoustic leakage detection system for boiler tubes are developed and online detection application software is programmed, which achieve the following function: detecting the occurrence and development of the leakages, recording historical data, estimating the leakage location, displaying the leakage noise spectrum, tracing on the trend of the leakages
     6、 设计了锅炉炉管泄漏声学监测系统的硬件设备,包括声波传导管的设计和声波传感器的设计; 以Visual C++6.0为开发工具开发一套对泄漏状况进行实时监测的应用程序,程序实现了噪声动态监测、历史数据记录、判断泄漏区域位置、显示泄漏噪声频谱、跟踪泄漏发展趋势等功能
短句来源
  leaked noise
     In order to obtain a better understand of the characteristics and location of noise source, the leaked electromagnetic noise in the klystron corridor of NSRL has been analogously calculated. The computational method and formula of high frequency leaked noise of the modulator were given.
     为确定泄漏噪声源的特性及位置 ,对国家同步辐射实验室速调管走廊泄漏电磁噪声进行了模拟计算 ,给出了调制器高频泄漏噪声的计算方法和计算公式。
短句来源

 

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      leakage noise
    This increased background leakage noise makes it difficult to differentiate defect-free devices from those with defects that draw significantly small amount of currents.
          
    If and cannot identical, then the leakage noise will be appeared to the output of the modulator and may degrade the performance.
          
    In order to minimize the effect of leakage noise, for a 128dB dynamic range, the leakage terms are kept more that -10dB below the noise floor.
          
    Recall that the laryngectomees chosen for this study had supple neck tissue and, therefore, tended to have less leakage noise to begin with.
          
    The integrator pole error in the first stage might cause leakage noise due to imperfect cancellation by the digital circuit.
          
      leaked noise
    Flicker noise from the RF signal path is upconverted around the LO frequency, except of the leaked noise due to imperfect switching.
          


    This thesis introduces the development, application and hardware structure of pressure-carrying heating Pipe in boiler, mathematical physical model of boiler leakage noise, and presents operation examples of leakage detection system.

    介绍锅炉承压受热管泄漏在纽监测系统的研制、应用、硬件构成、锅炉泄漏噪声的数学物理模型,给出了泄漏监测系统的运行实例。

    Based on the latest experimental results come from the sodium test loop,properties of leak noise in a steam genarator of a liquid metal fast breeder reactor (LMFBR) and all kinds of background noises are analyzed and discussed,such as sodium flow noise, water flow noise, pump and fan noises.A reasonable assumption about how to pick up the leak noise is put forward,and which will provide an experimental base for improving the sensitivity of the acoustic leak detection system.

    根据在实验Na回路上的实验结果,分析了快堆电站蒸汽发生器中Na噪声、H2O噪声、泵和风机噪声等泄漏信号和背景噪声的时域、频域特性,对泄漏噪声的提取方法提出了设想,为提高泄漏探测系统的灵敏度提供了实验依据。

    To monitor the problem of boiler pipe leaking online in heating power plant, after studying the weak points of boiler pipe and determining the arrangements of monitoring sensors, we have developed an online detecting device. This device has been developed on the basis of utilizing the principle of voice monitoring and the characteristics of the different frequencies between the running noises and the leaking noises. Using the signals magnifying and waves sieving technology, this device can distinguish the abnormal...

    To monitor the problem of boiler pipe leaking online in heating power plant, after studying the weak points of boiler pipe and determining the arrangements of monitoring sensors, we have developed an online detecting device. This device has been developed on the basis of utilizing the principle of voice monitoring and the characteristics of the different frequencies between the running noises and the leaking noises. Using the signals magnifying and waves sieving technology, this device can distinguish the abnormal signals. After quick analysis of Fourier alteration technology, we may get an audible signal spectrum. Based on the data transformation technology, the signals are monitored and recorded by a computer. It made possible the following functions:giving an earlier alarm when boiler pipe leaking occurs, determining the leaking points, displaying the leaking noise spectrum, tracing on the developing trend of leaking, monitoring the running noises and dust elimination. It provides an effective method of detecting boiler pipe leaking breakdown.

    为在线诊断电厂锅炉炉管泄漏故障研究了锅炉管的薄弱环节,确定监测传感器的布置方案,研制了锅炉炉管泄漏故障在线诊断装置. 该装置利用声学监测原理,依据正常运行背景噪声和泄漏故障噪声处在不同频段的特征, 进行了传感器的研制. 利用信号放大和滤波技术实现故障信号的识别. 经快速傅立叶变换技术分析, 得到声信号的频谱.利用 A D 转换技术,实现了计算机的实时监测处理和历史状态记录,实现了锅炉炉管泄漏故障早期报警、判定泄漏区域位置、显示泄漏噪声频谱、跟踪泄漏发展趋势、实时监听炉内噪声、监视吹灰运行工况等功能.

     
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