专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明公开

EP2485015A4 FLOW RATE MEASURING DEVICE 审中-公开
公开(公告)号：EP2485015A4
公开(公告)日：2017-12-20
申请号：EP10820148
申请日：2010-09-30
申请人： PANASONIC CORP
发明人： TAKEMURA KOUICHI , SHIBA FUMIKAZU
IPC分类号： G01F1/66
CPC分类号： G01F1/667 , G01F1/66 , G01F1/668
摘要： In a flow meter device of the present invention, a unit measuring step is defined as a procedure for measuring ultrasonic sound wave propagation times by changing the direction in which an ultrasonic sound wave is transmitted and received between a first transducer (2) and a second transducer (3), and a time measuring means (12) measures a propagation time in a forward direction and a propagation time in a reverse direction in a unit measuring step. A time difference detecting means (16) detects a difference between the propagation time in the forward direction and the propagation time in the reverse direction which are measured by the time measuring means (12). A determiner means (17) determines whether or not there is a fluid flow based on the time difference. According to presence/absence of a fluid flow, the number of times the unit measuring step is performed is determined. Therefore, it can be determined whether or not there is a fluid flow quickly in real time. A responsiveness can be improved such that a measuring method can be switched to correspond to presence/absence of a fluid flow.

3. 发明公开

EP2375223A4 FLOW RATE MEASUREMENT DEVICE 有权
标题翻译：吞吐量测量装置
公开(公告)号：EP2375223A4
公开(公告)日：2012-05-09
申请号：EP09837458
申请日：2009-12-25
申请人： PANASONIC CORP
发明人： TAKEMURA KOICHI , SHIBA FUMIKAZU , BESSHO DAISUKE
IPC分类号： G01F1/66 , G01F3/22
CPC分类号： G01F1/667
摘要： Switching a transmitting and receiving direction of two transducers (2,3) in the forward and the reverse direction, a time differential memory part (17b) storing a propagation time differential every K times a unit measurement process being executed, the propagation time differential being a differential between a propagation time of the ultrasonic wave signal in a forward direction and in a reverse direction, a flow rate calculating part (15) calculating a flow rate of a passing fluid based on a lump sum of propagation times in both the forward and the reverse directions obtained at least every K times of a unit measurement process being executed, an estimating part (18) estimating a change in a momentary flow rate of the fluid based on the time differential obtained every K times of the unit measurement process being executed and storing thereof in a time differential memory part (17b), thus obtaining an accurate flow rate and detecting the change in the momentary flow rate.

6. 发明公开

EP2224219A4 FLOW MEASUREMENT DEVICE 有权
公开(公告)号：EP2224219A4
公开(公告)日：2017-12-20
申请号：EP08861745
申请日：2008-12-12
申请人： PANASONIC CORP
发明人： SHIBA FUMIKAZU , TAKEMURA KOICHI , BESSYO DAISUKE
IPC分类号： G01F1/66
CPC分类号： G01F1/667 , G01F1/662
摘要： To find the propagation time of an ultrasonic wave, a difference occurs between the waveforms received upstream and downstream in a portion where the reception amplitude is comparatively large and it is prevented from being detected as an error of the propagation time. A reception signal is amplified in a reception unit 35 and reception point storage units 38 store the most recent reception point data in a plurality of storage sections in order until the signal level becomes a predetermined value (Vref). An average value of the two zero crossing points before and after the signal level becomes Vref can be adopted as a reception point, the propagation time with a small error of up and down offset, etc., is measured, and it is made possible to realize power saving operation by shortening the measurement time.

7. 发明公开

EP2653762A4 FLUID CONTROL VALVE 审中-公开
标题翻译： FLÜSSIGKEITSREGELVENTIL
公开(公告)号：EP2653762A4
公开(公告)日：2017-02-01
申请号：EP11849022
申请日：2011-12-13
申请人： PANASONIC CORP
发明人： NAKAI HIROSHI , MORIHANA HIDEAKI , NAGANUMA NAOTO , SHIBA FUMIKAZU , SUGIYAMA MASAKI
IPC分类号： F16K37/00 , F16K31/04 , G01D5/347
CPC分类号： G05D7/0635 , F16K37/0058 , G01B11/14 , G01D5/342 , Y10T137/0318

你已经成功收藏专利！

检索式保存成功!

IPRDB