共查询到19条相似文献,搜索用时 78 毫秒
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文中采用激光近红外线状光源, CCD技术及计算机图像处理等技术,对轨道的不平顺
进行检测,获得其不平顺参数,给铁路的安全运行提供可靠的信息依据。 相似文献
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采用激光近红外线状光源、CCD技术及计算机图像处理等技术,对轨道的不平顺进行检测,获得其不平顺参数,给铁路的安全运行提供了可靠的信息依据。 相似文献
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光电图像检测技术是以现代光学为基础,融光电子学、计算机图形/图像学、信息处理、计算机视觉等科学技术为一体的现代测量技术,介绍了光电图像检测系统原理及功能,并结合事例采用光电图像检测技术,对轨道的不平顺进行检测,获得其不平顺参数,给铁路的安全运行提供可靠的信息依据. 相似文献
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介绍了加速度传感器ADXL105的特点和工作原理,结合汽车平顺性测试的要求,给出了汽车平顺性测试电路的具体设计和必要的性能测试方法。[编者按] 相似文献
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针对于车轮多边形阶次发展趋势,运用高精度车轮周向不平顺检测设备进行测量,整合检测到的历史数据,提出了一种基于灰色神经网络的车轮多边形阶次预测模型。该模型充分运用了灰色模型计算量小,不需要大量样本数据的特点以及BP神经网络较强的非线性映射能力,利用该模型对车轮周向每个采样点的不平顺数据进行预测,再通过离散傅里叶变换和滤波处理得出该车轮各个阶次的粗糙度等级,以此来判断车轮多边形阶次的发展,较大程度上解决目前车轮镟修不及时等问题。 相似文献
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CCD动态检测轨道不平顺的研究及数据分析 总被引:2,自引:0,他引:2
介绍基于CCD的动态检测轨道不平顺的方法,给出了系统检测的原理、总体结构和软件处理流程.装置经过实际线路的试验证明是准确和可靠的,文章对试验做了数据分析. 相似文献
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首先阐述了检验自动化和检验信息化的概念,然后对比了检验信息化的优势,最后,以一个实际的案例介绍了测试数据自动采集与分析系统在军工产品检验验收中的具体应用。 相似文献
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Asano Kniji Obama Masao Arimura Yoshiaki Kondo Mitsunori Hitomi Yutaka 《Industrial Electronics, IEEE Transactions on》1983,(3):277-281
Developing a remote inspection system is an urgent necessity for reducing the down time of facility and occupational radiation exposure to inspection personnel in nuclear facilities. 相似文献
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提高目视检验水平是防止不良产品流至客户对策措施之一,这是十分重要而又有相当难度的课题。目前目视检验还很难做到完全杜绝不良品的流出,但无论如何必须想办法提高目 相似文献
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This paper considers a multistage production process with alternate inspection plans. At each stage a number of alternate inspection plans with different cost and reliabilities may be available. Since more reliable inspections are more costly it is essential to find out a compromise between the reliability and cost. A mathematical model is developed. Dynamic programming is used to determine at each stage that out of the available inspection plans (including the case of no inspection) which one will result in minimum s-expected total cost per item. 相似文献
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Expressions are given for the mean and variance of a simple unbiased estimator of the probability that a renewable system will be able to pass a given inspection (inspection survivability). Inspections are periodic and 100% accurate, but can damage the system. Numerical examples illustrate how sample size, inspection interval length, and failure rate affect the estimator's mean and variance. 相似文献
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Mammogram Inspection by Computer 总被引:3,自引:0,他引:3
We have considered the problem of computerized picture processing of mammographic images for the early detection of breast cancer by determination of the very significant microcalcifications. Brightness measures, gray-level statistics, and a compactness measure are applied in a decision tree to characterize the candidate objects. A verification technique was evaluated to differentiate between significant groups of microcalcifications and isolated objects as well as false alarms. Feasibility of the microcalcification detection algorithm was demonstrated in experiments using 132 mammogram subareas, each consisting of 512 ×512 picture elements. 相似文献