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    • 2. 发明专利
    • Ultrasonic flowmeter
    • 超声波流量计
    • JP2013096901A
    • 2013-05-20
    • JP2011241277
    • 2011-11-02
    • Toyo Gas Meter Kk東洋ガスメーター株式会社Tokyo Gas Co Ltd東京瓦斯株式会社Osaka Gas Co Ltd大阪瓦斯株式会社Toho Gas Co Ltd東邦瓦斯株式会社
    • MIZUKOSHI YASUSHIHORI FUJIONAKAMURA NOBUHIROYUASA KENICHIROOWAKU TAKASHIFUJII YASUHIROMASUDA TAKEHIROISHIDA HIROSHISAKANO TAKAHIRO
    • G01F1/66
    • PROBLEM TO BE SOLVED: To provide an ultrasonic flowmeter that can achieve highly accurate resolution in time measurement while keeping required specifications and costs of peripheral elements low and saving power consumption.SOLUTION: An ultrasonic flowmeter comprises a rough clock 1 that measures a total time x from transmission to reception of a measurement wave w; a main clock 2 that measures an excess time a from the reception of the measurement wave w to detection of a rough clock pulse 1p immediately after the reception of the measurement wave; delay matching means 3 that measures an error time b from detection of a main clock pulse 2p immediately after the reception of the measurement wave to the detection of the rough clock pulse 1p immediately after the reception of the measurement wave; and arithmetic operation means 4 that outputs as a required time y the balance of subtraction, from the total time x, of the remaining time of subtraction of the error time b from a multiple time d equivalent to the number of the main clock pulses 2p output from the reception of the measurement wave w to the detection of the rough clock pulse 1p immediately after the reception of the measurement wave.
    • 要解决的问题:提供一种超声波流量计,可以实现高精度的时间分辨率,同时保持周边元件的所需规格和成本,并节省功耗。 解决方案:超声波流量计包括测量从发射到接收测量波w的总时间x的粗略时钟1; 主时钟2,其测量从测量波w的接收到紧接在接收测量波之后的粗略时钟脉冲1p的超时时间a; 延迟匹配装置3,其从接收到测量波之后的主时钟脉冲2p的检测到紧接在测量波之后的粗略时钟脉冲1p的检测来测量误差时间b; 以及算术运算装置4,从相当于主时钟脉冲2p输出数的多个时间d的剩余时间的总时间x中输出作为所需时间y的减法平均值 从测量波w的接收到接收测量波之后的粗略时钟脉冲1p的检测。 版权所有(C)2013,JPO&INPIT
    • 5. 发明专利
    • Gas shut-off device
    • 气体切断装置
    • JP2013205247A
    • 2013-10-07
    • JP2012075058
    • 2012-03-28
    • Panasonic Corpパナソニック株式会社Tokyo Gas Co Ltd東京瓦斯株式会社Osaka Gas Co Ltd大阪瓦斯株式会社Toho Gas Co Ltd東邦瓦斯株式会社
    • IWAMOTO RYUJIASANO KAZUTAKASAKUMA HIROHISAYUASA KENICHIROOWAKU TAKASHIASADA SHOJIFUJII YASUHIROMASUDA TAKEHIROISHIDA HIROSHISAKANO TAKAHIRO
    • G01F3/22F23K5/00G01F1/00
    • PROBLEM TO BE SOLVED: To provide a gas shut-off device in which the number of times of detecting sensor abnormality is counted, the detected number of times is compared with a predetermined number of times and when the detected number of times is less than the predetermined number of times, even without sensor abnormality cancellation input, recovery can be performed by a manual recovering operation.SOLUTION: A gas shut-off device comprises sensor abnormality determination means 6 which determines predetermined sensor abnormality in flow measurement and outputs a shut-off signal when abnormality is established. The number of times of determining abnormality by means of the sensor abnormality determination means 6 is counted by sensor abnormality time count means 8 and when sensor abnormality time determination means 7 determines that a time count value of the sensor abnormality time count means 8 is less than a sensor abnormality determination count 9, recovery can be performed by manual recovery means 11 in accordance with an instruction of recovery method decision means 10.
    • 要解决的问题:为了提供其中对传感器异常检测次数进行计数的气体切断装置,将检测次数与预定次数进行比较,并且当检测到的次数小于 预定次数,即使没有传感器异常消除输入,也可以通过手动恢复操作进行恢复。解决方案:气体切断装置包括传感器异常判定装置6,其确定流量测量中的预定传感器异常并输出关闭 当异常建立时发出信号。 通过传感器异常判定装置6判定异常的次数由传感器异常时间计数装置8进行计数,当传感器异常时间判定装置7判断为传感器异常时间计数装置8的时间计数值小于 传感器异常确定计数9,可以根据恢复方法判定装置10的指令由手动恢复装置11执行恢复。
    • 7. 发明专利
    • Gas shut-off device
    • 气体切断装置
    • JP2013205250A
    • 2013-10-07
    • JP2012075078
    • 2012-03-28
    • Panasonic Corpパナソニック株式会社Tokyo Gas Co Ltd東京瓦斯株式会社Osaka Gas Co Ltd大阪瓦斯株式会社Toho Gas Co Ltd東邦瓦斯株式会社
    • UEKI KOICHIIWAMOTO RYUJIASANO KAZUTAKANAKABAYASHI YUJISAKUMA HIROHISAYUASA KENICHIROOWAKU TAKASHIASADA SHOJIFUJII YASUHIROMASUDA TAKEHIROISHIDA HIROSHISAKANO TAKAHIRO
    • G01F3/22F23K5/00G01F1/66
    • PROBLEM TO BE SOLVED: To prevent erroneous shut-off caused by measurement abnormality monitoring in ultrasonic flowmeter measurement.SOLUTION: A gas shut-off device comprises an upstream-side transceiver 16 and a downstream-side transceiver 17 which are disposed along a flow of a flow passage, transmission means for driving the transceivers 16, 17, switching means 18 for switching transmission/reception of the transceivers 16, 17, receiving means 20 for receiving ultrasonic waves, signal detection control means 22 for controlling detection start of a receiving signal, amplitude determination means 23 which determines an amplitude is equal to or more than a predetermined ultrasonic signal level, propagation time measuring means 24 which measures a time from driving start in the transmission means 19 to signal detection in the amplitude determination means 23, flow computing means 25 which computes an instantaneous flow value from a measurement of the propagation time measuring means 24, flow change determination means 26 which determines the presence/absence of flow fluctuation equal to or more than a predetermined value from the flow computed by the flow computing means 25, and signal detection computing means 27 which computes the time to make earlier the signal detection start in the signal detection control means 22 when the change equal to or more than the predetermined flow is detected by the flow change determination means 26.
    • 要解决的问题:为了防止超声波流量计测量中的测量异常监测引起的错误切断。解决方案:一种气体切断装置,包括上游侧收发器16和下游侧收发器17, 流路,用于驱动收发器16,17的发送装置,用于切换收发机16,17的发送/接收的切换装置18,用于接收超声波的接收装置20,用于控制接收信号的检测开始的信号检测控制装置22 确定振幅的幅度确定装置23等于或大于预定超声波信号电平;传播时间测量装置24,其测量从发送装置19中的开始启动到振幅确定装置23中的信号检测的时间;流量计算 装置25,其计算来自传播时间测量装置24的测量值的瞬时流量值, 流量变化确定装置26,其根据流量计算装置25计算的流量确定等于或大于预定值的流量波动的存在/不存在;以及信号检测计算装置27,其计算使信号检测开始更早的时间 当由流量变化确定装置26检测到等于或大于预定流量的变化时,在信号检测控制装置22中。