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21. 发明专利

JP2009243838A Gas flow monitoring device 有权
标题翻译：气体流量监测装置
公开(公告)号：JP2009243838A
公开(公告)日：2009-10-22
申请号：JP2008093719
申请日：2008-03-31
申请人： High Pressure Gas Safety Institute Of Japan , Osaka Gas Co Ltd , Panasonic Corp , Toho Gas Co Ltd , Tokyo Gas Co Ltd , Toshiba Corp , パナソニック株式会社 , 大阪瓦斯株式会社 , 東京瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社東芝 , 高圧ガス保安協会
发明人： SUZUKI MAMORU , TSUKAHARA YUICHI , NAGANUMA TETSUO , KOBAYASHI MASATOMO , NAGAI NOZOMI , KONO SACHIKO , KAWAGUCHI KEIJI , ISHIDA HIROSHI , NANBA MITSUO , KUBO KAZUO , SAITO TAKASHI , MARUYAMA KIYOSHI , KATO AKIRA , ASANO KAZUTAKA , IWAMOTO RYUJI , NAKAMURA HIROSUMI , OTANI TAKAHISA , HIRAYAMA YUICHI , ISHINO HITOAKI , SAKAMAKI MICHIHIKO
IPC分类号： F23K5/00 , G01F3/22
摘要： PROBLEM TO BE SOLVED: To provide a gas flow monitoring device, suitably using safe continuous working time in gas using facilities having a room with very high air tightness such as a basement, having a ventilator and favorably performing management in the operating status of the ventilator.
SOLUTION: In constructing the gas flow monitoring device based on the safe continuous working time, a standard safe continuous working time series, a reduced safe continuous working time series, and an extended safe continuous working time series are stored in a storage part, and one of the standard safe continuous working time series, the reduced safe continuous working time series, and the extended safe continuous working time series is selectively used as the safe continuous working time series used for monitoring in a monitoring part. The reduced safe continuous working time series is selected and used for the gas using facilities having a room with high sealing performance.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种气体流量监测装置，适当地使用具有具有非常高气密性的房间的气体使用设施中的安全连续工作时间，诸如地下室，具有通风机并且有利地在操作状态下执行管理的呼吸机。
解决方案：在安全连续工作时间的基础上构建气体流量监测装置，将标准安全连续工作时间序列，减少安全连续工作时间序列和延长安全连续工作时间序列存储在存储部分，安全连续工作时间序列之一，安全连续工作时间序列缩短，安全连续工作时间延长等作为监控部分的安全连续工作时间序列。减少安全连续工作时间序列被选择并用于具有高密封性能的房间的气体使用设施。版权所有（C）2010，JPO＆INPIT

22. 发明专利

JP2010261746A Gas shut-off device 有权
标题翻译：气体切断装置
公开(公告)号：JP2010261746A
公开(公告)日：2010-11-18
申请号：JP2009110902
申请日：2009-04-30
申请人： Osaka Gas Co Ltd , Panasonic Corp , Toho Gas Co Ltd , Tokyo Gas Co Ltd , Toyo Gas Meter Kk , Yazaki Corp , パナソニック株式会社 , 大阪瓦斯株式会社 , 東京瓦斯株式会社 , 東洋ガスメーター株式会社 , 東邦瓦斯株式会社 , 矢崎総業株式会社
发明人： UEKI KOICHI , OTANI TAKAHISA , NAKABAYASHI YUJI , ASANO KAZUTAKA , KOBAYASHI MASATOMO , WATANABE AKIRA , KONO SACHIKO , YUASA KENICHIRO , NAGAI NOZOMI , ISHIKAWA TETSUO , KAWAGUCHI KEIJI , FUJII YASUHIRO , ISHIDA HIROSHI , SAKANO TAKAHIRO , YAMAURA MICHIAKI , ISOBE KIMIKATSU , HORI FUJIO , SHIMIZU HIROSHI
IPC分类号： G01F1/66 , G01F3/22 , G01N27/02
摘要： PROBLEM TO BE SOLVED: To provide a gas shut-off device capable of shutting off a gas by detecting infiltration of water, or the like, into a flow channel or a control part in the device.
SOLUTION: The gas shut-off device includes an amplification degree determining means 18 for determining a signal amplification degree of a flow rate detection means 8 performing flow rate detection with propagation velocity of an ultrasonic wave between vibrators 6, 7 disposed along the flow channel 4; a propagation time determination means 20 for determining the propagation time; a measurement condition setting means 16 changing a measurement condition; a flow channel inside abnormality determination means 22 for estimating water intrusion in the flow channel, when an abnormally short propagation time is detected at the amplification degree equal to or less than a lower limit determination value; a clocking means 23, activated when the amplification degree of an upper limit determination value or more is determined; a measurement ratio calculation means 24 for obtaining a ratio set at the maximum measurement condition during the clocking; an impedance estimation means 25 for estimating the abnormality of impedance between terminals of the flow rate detection means 8, when it is determined that the amplification degree is equal to or more than the upper limit determination value and the measurement ratio is equal to or more than a prescribed value; and a shut-off means 27 for shutting off the supply of gas at abnormality.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够通过检测水等的渗透而关闭气体的气体切断装置到装置中的流路或控制部中。气体切断装置包括：放大度判定装置18，用于确定流量检测装置8的信号放大度，该流量检测装置8执行流速检测，其传播速度是沿着沿着该方向设置的振动器6,7之间的超声波流路4; 用于确定传播时间的传播时间确定装置20; 改变测量条件的测量条件设置装置16; 当以等于或小于下限确定值的放大度检测到异常较短的传播时间时，用于估计流道中的水侵入的异常确定装置22内的流路; 当确定上限确定值或更多的放大度时激活的计时装置23; 用于获得在计时期间在最大测量条件下设定的比率的测量比率计算装置24; 用于估计流量检测装置8的端子之间的阻抗的异常的阻抗估计装置25，当确定放大度等于或大于上限确定值并且测量比等于或大于规定值以及用于在异常情况下关闭气体供应的切断装置27。版权所有（C）2011，JPO＆INPIT

23. 发明专利

JP2010096539A Gas meter, method of determining change in flow rate, and program for determining change in flow rate 有权
标题翻译：流量计，流量变化确定方法及流量变化确定方案
公开(公告)号：JP2010096539A
公开(公告)日：2010-04-30
申请号：JP2008265502
申请日：2008-10-14
申请人： High Pressure Gas Safety Institute Of Japan , Osaka Gas Co Ltd , Panasonic Corp , Toho Gas Co Ltd , Tokyo Gas Co Ltd , Toshiba Corp , パナソニック株式会社 , 大阪瓦斯株式会社 , 東京瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社東芝 , 高圧ガス保安協会
发明人： NAGAI NOZOMI , KONO SACHIKO , KOBAYASHI MASATOMO , KAWAGUCHI KEIJI , ISHIDA HIROSHI , NANBA MITSUO , KUBO KAZUO , SAITO TAKASHI , MARUYAMA KIYOSHI , KATO AKIRA , ASANO KAZUTAKA , NAKAMURA HIROSUMI , OTANI TAKAHISA , IWAMOTO RYUJI , HIRAYAMA YUICHI , ISHINO HITOAKI , SAKAMAKI MICHIHIKO
IPC分类号： G01F3/22 , F23K5/00
摘要： PROBLEM TO BE SOLVED: To provide a gas meter, or the like, that attains more exact public security preservation control, by accurately grasping operation where a gas flow rate changes suddenly, such as, use of a water heater by a single lever.
SOLUTION: The gas meter includes: a measurement means for measuring the instantaneous flow rate of gas passing through a gas channel at a prescribed time interval; a storage means for storing the measured instantaneous flow rate; and a control means for determining that the gas flow rate has varied due to intentional operation to a gas appliance installed at a downstream side of a place, where the measurement means is installed in the gas channel when the difference between a first instantaneous flow rate, namely, an instantaneous flow rate, and a second instantaneous flow rate measured last time of the first instantaneous flow rate is not less than the predetermined first threshold by the instantaneous flow rate to be stored; and when all the differences between a prescribed number of respective continuous instantaneous flow rates to be measured, after the first instantaneous flow rate and an average flow rate within a prescribed amount of time until the second instantaneous flow rate is measured, are not less than a preset second threshold.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种通过精确地掌握气体流量急剧变化的操作，例如通过单个使用热水器来获得更精确的公共安全保护控制的燃气表等杠杆。解决方案：气量计包括：测量装置，用于以规定的时间间隔测量通过气体通道的气体的瞬时流量; 用于存储所测量的瞬时流量的存储装置; 以及控制装置，用于确定气体流量由于有意操作而变化，安装在安装在气体通道下游侧的燃气器具上，当第一瞬时流量，即瞬时流量，并且第一瞬时流量的上次测量的第二瞬时流量不小于预先存储的瞬时流量的预定第一阈值; 并且当在所测量的相应连续瞬时流量的规定数量之后，在第一瞬时流量和在第二瞬时流量之前的规定时间内的平均流量之间的所有差异不小于预设第二个门槛。版权所有（C）2010，JPO＆INPIT

24. 发明专利

JP2009244170A Gas meter, its control method, and control program 有权
标题翻译：气体表，其控制方法和控制程序
公开(公告)号：JP2009244170A
公开(公告)日：2009-10-22
申请号：JP2008092538
申请日：2008-03-31
申请人： High Pressure Gas Safety Institute Of Japan , Osaka Gas Co Ltd , Panasonic Corp , Toho Gas Co Ltd , Tokyo Gas Co Ltd , Toshiba Corp , パナソニック株式会社 , 大阪瓦斯株式会社 , 東京瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社東芝 , 高圧ガス保安協会
发明人： SUZUKI MAMORU , TSUKAHARA YUICHI , NAGANUMA TETSUO , KOBAYASHI MASATOMO , NAGAI NOZOMI , KONO SACHIKO , KAWAGUCHI KEIJI , ISHIDA HIROSHI , NANBA MITSUO , KUBO KAZUO , SAITO TAKASHI , MARUYAMA KIYOSHI , KATO AKIRA , ASANO KAZUTAKA , IWAMOTO RYUJI , NAKAMURA HIROSUMI , OTANI TAKAHISA , HIRAYAMA YUICHI , ISHINO HITOAKI , SAKAMAKI MICHIHIKO
IPC分类号： G01F3/22
摘要： PROBLEM TO BE SOLVED: To secure safety; to quicken gas supply by manual reset; and to improve convenience, in a gas meter capable of automatic reset and manual reset of a cutoff valve. SOLUTION: A first leak determination flow rate L 1 to be compared with a gas leak flow rate, and a second leak determination flow rate L 2 which is different from the first leak determination flow rate are set, and the cutoff valve 12 is opened by receiving a reset instruction by a reset button 24. When a detection gas leak flow rate is equal to or lower than the first leak determination flow rate, the cutoff valve is controlled in the open state, and after elapse of a waiting time from cutoff of the cutoff valve or its instruction, the cutoff valve is opened. When the detection gas leak flow rate is equal to or lower than the second leak determination flow rate, the cutoff valve is controlled in the open state. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：确保安全; 通过手动复位加快供气; 并且能够在能够自动复位和手动复位截止阀的燃气表中提高便利性。解决方案：与气体泄漏流量进行比较的第一泄漏确定流量L 1 以及与气体泄漏流量不同的第二泄漏确定流量L 2 设定第一泄漏判定流量，通过接收到复位按钮24的复位指令来切断截止阀12.当检测气体泄漏流量等于或低于第一泄漏判定流量时，截止阀被控制在打开状态，并且在从截止阀或其指令的截止经过等待时间之后，断开阀打开。当检测气体泄漏流量等于或低于第二泄漏判定流量时，截止阀被控制在打开状态。版权所有（C）2010，JPO＆INPIT

25. 发明专利

JP2008102064A Gas shut-off device 有权
标题翻译：气体切断装置
公开(公告)号：JP2008102064A
公开(公告)日：2008-05-01
申请号：JP2006285939
申请日：2006-10-20
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： OTANI TAKAHISA , MURAKAMI SHIGERU
IPC分类号： G01F3/22 , F23K5/00 , G01F1/66 , G08B25/04 , G08B25/10
摘要： PROBLEM TO BE SOLVED: To provide a gas shut-off device capable of reducing dispersion of a flow rate and suppressing battery consumption, by determining whether a pulsation phenomenon is transient or continuous, and thereby switching to a measuring mode.
SOLUTION: This device is equipped with a flow rate detection part 17 for outputting a flow rate signal at a prescribed measuring period; a flow rate calculation part 19 for calculating the flow rate; a pulsation determination part 25 for comparing a measured flow rate value with a pulsation determination value determined beforehand, and outputting a pulsation signal when determined to be abnormal; a radio communication means 11b for transmitting the pulsation signal to a plurality of adjacent gas meters 2A-2D, and receiving a pulsation signal from another gas meter; an external pulsation determination part 10f for outputting an external pulsation determination signal corresponding to a received content by the radio communication means 11b; and a flow rate measurement instruction part 10a for instructing a change of a measuring period of the flow rate detection part corresponding to a determination result from the pulsation determination part 25 and a determination signal from the external pulsation determination part 10f. The pulsation determination signal from the external pulsation determination part 10f has a switching condition between a high-precision flow measuring mode and an ordinary flow measuring mode.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决的问题：提供一种能够通过判断脉动现象是瞬时还是连续的，从而切换到测量模式，能够减少流量的分散和抑制电池消耗的气体切断装置。解决方案：该装置配备有用于在规定的测量周期输出流量信号的流量检测部17; 用于计算流量的流量计算部19; 用于将测量的流量值与预先确定的脉动判定值进行比较并在判定为异常时输出脉动信号的脉动判定部25; 用于将脉动信号发送到多个相邻的气表2A-2D的无线电通信装置11b，并且从另一个气量计接收脉动信号; 外部脉动判定部10f，用于输出由无线通信装置11b对应于接收到的内容的外部脉动判定信号; 和用于指示与来自脉动判定部25的判定结果对应的流量检测部的测定期间的变化的流量测定指示部10a和来自外部脉动判定部10f的判定信号。来自外部脉动判定部10f的脉动判定信号具有高精度流量测量模式和普通流量测量模式之间的切换条件。版权所有（C）2008，JPO＆INPIT

26. 发明专利

JP2008008734A Gas shutoff apparatus 有权
标题翻译：气体开关装置
公开(公告)号：JP2008008734A
公开(公告)日：2008-01-17
申请号：JP2006179131
申请日：2006-06-29
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： UEKI KOICHI , ASANO KAZUTAKA , OTANI TAKAHISA
IPC分类号： G01F3/22 , G01F1/66
摘要： PROBLEM TO BE SOLVED: To provide a gas shutoff apparatus which promptly detects an abnormal flow and stops medium supply such as gas. SOLUTION: The gas shutoff apparatus detects a flow speed in piping by a flow speed detection means 8, converts it into a flow rate by a flow rate calculation means 14, stores an abnormal flow rate decision value of an instrument in use or the like in a flow rate abnormality storage means 16, determines an instantaneous flow rate estimated value by a flow rate estimation means 15 from an instantaneous flow rate determined by the flow rate calculation means 14, compares the instantaneous flow rate of the flow estimation means 15 with the abnormal flow rate decision value of the flow abnormality storage means 16, and stops the medium supply by a shutoff means 18 when an abnormality decision means 17 decides that the instantaneous flow rate estimated value is larger than a flow rate abnormality storage value. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够及时检测异常流量并停止诸如气体的介质供应的气体截止装置。解决方案：气体截止装置通过流速检测装置8检测管道中的流速，通过流量计算装置14将其转换为流量，存储正在使用的仪器的异常流量判定值或流量异常存储装置16中的流量估计装置15根据由流量计算装置14确定的瞬时流量由流量估计装置15确定瞬时流量估计值，比较流量估计装置15的瞬时流量具有流量异常存储装置16的异常流量判定值，并且当异常判定装置17判定瞬时流量估计值大于流量异常存储值时，通过切断装置18停止介质供给。版权所有（C）2008，JPO＆INPIT

27. 发明专利

JP2007240072A Gas cutoff system 审中-公开
标题翻译：气体切割系统
公开(公告)号：JP2007240072A
公开(公告)日：2007-09-20
申请号：JP2006063879
申请日：2006-03-09
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： ASANO KAZUTAKA , UEKI KOICHI , OTANI TAKAHISA
IPC分类号： F23K5/00 , F23N5/24 , G05B9/02
摘要： PROBLEM TO BE SOLVED: To provide a gas cutoff system capable of shortening a continued use time in determining a specific flow rate pattern.
SOLUTION: This gas cutoff system comprises a flow rate measuring means 1 measuring a gas flow rate, a continued use time setting means 2 setting the continued use time according to the measured flow rate, a continued use time counting means 3 counting the continued use time, a gas cutoff means 4 for cutting off a gas passage when a value of the continued use time counting means is 0 or more, and a specific flow rate pattern determining means 5 setting a time shorter than the continued use time set by the continued use time setting means 2, when the flow rate measured by the flow rate measuring means 1 has the specific flow rate pattern, thus the safety of the gas cutoff system can be further improved.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供能够缩短在确定特定流量模式中的持续使用时间的气体截断系统。解决方案：该气体切断系统包括测量气体流量的流量测量装置1，连续使用时间设定装置2，根据测量的流量设定持续使用时间;持续使用时间计数装置3计数持续使用时间，当持续使用时间计数装置的值为0以上时切断气体通道的气体截断装置4，以及设定比由连续使用时间计数装置设定的持续使用时间设定的时间短的时间的比流量图案确定装置5 继续使用时间设定单元2，当流量测量单元1测得的流量具有比流量模式时，可进一步提高气体切断系统的安全性。版权所有（C）2007，JPO＆INPIT

28. 发明专利

JP2007232672A Gas interrupter 审中-公开
标题翻译：气体中断器
公开(公告)号：JP2007232672A
公开(公告)日：2007-09-13
申请号：JP2006057413
申请日：2006-03-03
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： UEKI KOICHI , ASANO KAZUTAKA , OTANI TAKAHISA
IPC分类号： G01F3/22 , G01F1/66
摘要： PROBLEM TO BE SOLVED: To provide a gas interrupter for immediately detecting an abnormal flow rate, and deactivating a supply of a medium such as a gas.
SOLUTION: A flow rate calculating means 10 converts a flow rate based on a flow speed detected by a flow speed detecting means 4. A comparison/determination means 12 compares a found instantaneous flow rate value with an abnormal flow rate determination value stored in a flow rate storing means 11. A flow rate frequency counting means 13 continuously measures an event that the detected instantaneous flow rate is the abnormal flow rate or more. An abnormality determining section 15 interrupts an interruption means 16 if a frequency of abnormalities reaches the predetermined frequency in the flow rate frequency counting means 13. The supply of the gas is interrupted.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于立即检测异常流量的气体断路器，以及停用诸如气体的介质的供应。解决方案：流量计算装置10基于由流速检测装置4检测的流速来转换流量。比较/确定装置12将找到的瞬时流量值与存储的异常流量确定值进行比较流量频率计数装置13连续地测量检测到的瞬时流量是异常流量或更多的事件。如果在流量频率计数装置13中异常频率达到预定频率，则异常确定部分15中断中断装置16.气体的供应被中断。版权所有（C）2007，JPO＆INPIT

29. 发明专利

JP2006313170A Flow measuring device 审中-公开
标题翻译：流量测量装置
公开(公告)号：JP2006313170A
公开(公告)日：2006-11-16
申请号：JP2006191412
申请日：2006-07-12
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： KOBA YASUO , NAKAMURA HIROSUMI , OTANI TAKAHISA , KAMIYAMA KAZUNORI
IPC分类号： G01F3/22
摘要： PROBLEM TO BE SOLVED: To provide a flow measuring instrument for accurately measuring an instantaneous flow rate.
SOLUTION: A gas meter 100 constituting the flow measuring instrument is equipped with a coat part 52 fixed on a body 50 to define a measurement chamber 4 for housing/discharging a fluid, a rotary member 54 rotating in conjunction with the reciprocation of the coat part 52, and movement detection means 5 and 6 for detecting the movement of the rotary member 54. The measuring instrument is capable of flow measurement at an arbitrary position of the rotary member 54; the rotary member 54 is linked via a link mechanism to the coat part 52 so as to make one revolution per round trip of the coat part 52 reciprocated by the supply/discharge of gas to/from the measurement chamber 4. A plurality of points are arbitrarily set on a rotation track of the rotary member 54 while continuing flow-rate measurement at the plurality of set points, thereby finding a plurality of different flow-rate values at different measurement points.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于精确测量瞬时流量的流量测量仪。＆lt; P＆gt;解决方案：构成流量计的气量计100配备有固定在主体50上的涂覆部52，以限定用于容纳/排出流体的测量室4，与旋转构件54的往复运动涂层部分52和用于检测旋转部件54的运动的运动检测装置5和6.测量装置能够在旋转部件54的任意位置进行流量测量; 旋转构件54通过连杆机构连接到涂覆部52，以便通过向测量室4进行气体的供给/排出而使涂层52的往返行程一转。多个点为任意设置在旋转部件54的旋转轨道上，同时在多个设定点继续流量测量，从而在不同的测量点处找到多个不同的流量值。版权所有（C）2007，JPO＆INPIT

30. 发明专利

JP2006194597A Flow velocity or flow rate measuring apparatus 有权
标题翻译：流速或流量测量装置
公开(公告)号：JP2006194597A
公开(公告)日：2006-07-27
申请号：JP2005003489
申请日：2005-01-11
申请人： Matsushita Electric Ind Co Ltd , Tokyo Gas Co Ltd , 東京瓦斯株式会社 , 松下電器産業株式会社
发明人： NAGAOKA YUKIO , OTANI TAKAHISA , NAKABAYASHI YUJI , FUJIMOTO TATSUO , SUZUKI MAMORU , YUASA KENICHIRO
IPC分类号： G01F1/72 , G01F1/66 , G01P5/00
摘要： PROBLEM TO BE SOLVED: To switch measuring means according to variations in flow rate values and alter criterion values for the changeover. SOLUTION: This flow rate or flow velocity measuring apparatus is provided with an electric-power-saving measuring means 21 in which the number of times of measurement or measuring time of a fluid detection means 17 is set small or short; a high-precision measuring means 20 in which the number of times of measurement or measuring time of the fluid detection means 17 is set large or long; a variation determination means 18 for shifting to the high-precision measuring means 20 when variations of measured values at the electric-power-saving measuring means 21 have exceeded a prescribed value; and a stability determination means 19 for shifting to the electric-power-saving measuring means 21 when measured values of the high-precision measuring means 20 have been stabilized within a prescribed value, and by altering a criterion value of each determination means, appropriately switches the measuring means according to flow rate variations, and accurately measure flow rate with low electric power consumption. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：根据流量值的变化切换测量装置，并改变切换的标准值。该流量或流速测量装置设置有将流体检测单元17的测量次数或测量时间设定为小或短的电力节省测量单元21，其中流体检测装置17的测量次数或测量时间被设置为大或长的高精度测量装置20; 变更确定装置18，用于在电力节省测量装置21的测量值的变化超过规定值时转移到高精度测量装置20; 以及稳定度确定装置19，当高精度测量装置20的测量值已经稳定在规定值内时，转换到节电测量装置21，并且通过改变每个确定装置的标准值，适当地切换测量装置根据流量变化，并以低功耗精确测量流量。版权所有（C）2006，JPO＆NCIPI

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