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公开(公告)号：US20080263380A1
公开(公告)日：2008-10-23
申请号：US11738825
申请日：2007-04-23
CPC分类号： G06F1/14
摘要： A method is presented to improve the accuracy of time synchronization of data. The invention consists of a timing module compromising a GPS interface with ability controller-based timing standard, high speed inputs and outputs and an asynchronous interface to an external processor system. It attaches a time-stamp referenced to an absolute time standard to transitions on the high speed inputs and a means for delivering these time stamps referenced to the high speed input to a computer or network. Alternatively the computer or network can specify a high speed output and an absolute time for an output transition and the timing module can deliver the specified output transition at the specified absolute time. Compared to existing systems of time synchronization, it will improve the accuracy of the timed data from the current Ethernet tolerance of up to 5 milliseconds to a possible tolerance of 250 nanoseconds.
摘要翻译： 提出了一种提高数据时间同步精度的方法。 本发明包括一个定时模块，它利用基于能力控制器的定时标准，高速输入和输出以及与外部处理器系统的异步接口来影响GPS接口。 它附加了一个参考绝对时间标准的时间标记，用于高速输入上的转换，以及将参考高速输入的这些时间戳传送到计算机或网络的装置。 或者，计算机或网络可以指定高速输出和输出转换的绝对时间，并且定时模块可以在指定的绝对时间递送指定的输出转换。 与现有的时间同步系统相比，它将提高定时数据的准确性，从当前的以太网容限高达5毫秒到250纳秒的可能容限。
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公开(公告)号：US06745632B1
公开(公告)日：2004-06-08
申请号：US10453382
申请日：2003-06-03
IPC分类号： G01N2918
CPC分类号： G01N29/4436 , G01N29/024 , G01N29/348 , G01N29/4472 , G01N29/46 , G01N29/50 , G01N2291/02836
摘要： Embodiments of the invention provide an algorithm for enhancing the transit time measurement of an ultrasonic wave through a fluid, and criteria for evaluating the suitability for various waveforms with regard to noise rejection. The transit time calculation provides a greater noise immunity and accuracy than techniques used in the prior art, and allows a measure of weighting of dispersed signals with different arrival times. The transit time calculation utilizes either the transmitted signal or the measurement of a reference system, the calculation of the squared convolution of this signal with the received signal, and the calculation of the transit time from the time-weighted squared convolution signal over a suitable interval defined by the minimums of the squared convolution signal. In the case of dispersion where the arrival times are symmetrically displaced around a mean transit time, or if asymmetric dispersion is suitably within the main lobe, the calculation properly weights the composite signal. The symmetry of the calculated autocorrelation function predicts the accuracy of the algorithm, and deconvolution can be used to estimate the composition of the composite delay function in such cases.
摘要翻译： 本发明的实施例提供了一种用于增强通过流体的超声波的通过时间测量的算法，以及用于评估关于噪声抑制的各种波形的适用性的标准。 通过时间计算提供比现有技术中使用的技术更大的噪声抗扰度和精度，并且允许对具有不同到达时间的分散信号的加权的度量。 通行时间计算利用发射信号或参考系统的测量，该信号与接收信号的平方卷积的计算以及在适当间隔上的时间加权平方卷积信号的渡越时间的计算 由平方卷积信号的最小值定义。 在分散的情况下，到达时间围绕平均通过时间对称移位，或者如果非对称色散适当地在主波瓣内，则计算适当地加权复合信号。 计算的自相关函数的对称性预测了算法的准确性，并且在这种情况下可以使用去卷积来估计复合延迟函数的组成。
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公开(公告)号：US09076044B2
公开(公告)日：2015-07-07
申请号：US13716101
申请日：2012-12-15
IPC分类号： G06K9/00
CPC分类号： G06K9/00771
摘要： A method and apparatus to monitor and document that proper hygienic procedures are followed by food service providers consisting of a camera, a processor controlling the camera, and software to accomplish the hand washing monitoring. The criteria for identifying the start and end of a hand washing event by monitoring activity is selected areas is presented. A record is created of the wash event including a sequence of photograph during the event and additional related data such as start time, duration, location, and any employee identification. This record is available for recording or downloading to a server for further manipulation, including washer identification and statistical analysis.
摘要翻译： 由相机，控制相机的处理器以及软件来完成洗手监控的食品服务提供者遵循适当的卫生程序的方法和装置。 提出了通过监视活动来识别洗手事件的开始和结束的标准。 创建一个清洗事件的记录，包括事件中的一系列照片，以及其他相关数据，如开始时间，持续时间，位置和任何员工标识。 该记录可用于记录或下载到服务器进行进一步操作，包括清洗机识别和统计分析。
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公开(公告)号：US20140169622A1
公开(公告)日：2014-06-19
申请号：US13716101
申请日：2012-12-15
IPC分类号： G06K9/00
CPC分类号： G06K9/00771
摘要： A method and apparatus to monitor and document that proper hygienic procedures are followed by food service providers consisting of a camera, a processor controlling the camera, and software to accomplish the hand washing monitoring. The criteria for identifying the start and end of a hand washing event by monitoring activity is selected areas is presented. A record is created of the wash event including a sequence of photograph during the event and additional related data such as start time, duration, location, and any employee identification. This record is available for recording or downloading to a server for further manipulation, including washer identification and statistical analysis.
摘要翻译： 由相机，控制相机的处理器以及软件来完成洗手监控的食品服务提供者遵循适当的卫生程序的方法和装置。 提出了通过监视活动来识别洗手事件的开始和结束的标准。 创建一个清洗事件的记录，包括事件中的一系列照片，以及其他相关数据，如开始时间，持续时间，位置和任何员工标识。 该记录可用于记录或下载到服务器进行进一步操作，包括清洗机识别和统计分析。
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