JP2003315123A5 - - Google Patents
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- JP2003315123A5 JP2003315123A5 JP2002126452A JP2002126452A JP2003315123A5 JP 2003315123 A5 JP2003315123 A5 JP 2003315123A5 JP 2002126452 A JP2002126452 A JP 2002126452A JP 2002126452 A JP2002126452 A JP 2002126452A JP 2003315123 A5 JP2003315123 A5 JP 2003315123A5
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Claims (5)
受信側の超音波送受波器の信号を入力とする受信波検知部は、一方が他方の一定倍の関係を持つ基準電圧レベルのペアが異なる電圧で複数組用意されていて、ある基準レベルに対し最初にそのレベルを越えた波がその基準レベルとペアになるもう一つの基準レベルも一気に越える１つのペアが存在するときその波のゼロクロスポイントを到達ポイントとするもので、
前記１つのペアが、前記複数組のペアの内、最も低い電圧のペアであるときにアラームを出すようにしたことを特徴とする超音波流量計。Also provided with at least one pair of ultrasonic transducer acting in the receiving side to the transmitting side, upstream from the downstream and downstream through the fluid flow from the upstream performs transmission and reception of ultrasonic waves, Ri by the arrival time of the respective orientation an ultrasonic flow meter for determining the flow rate,
The received wave detection unit that receives the signal of the ultrasonic transducer on the receiving side has multiple pairs of reference voltage levels with different voltages, one of which is a fixed multiple of the other. On the other hand, when there is one pair where the first wave that exceeds that level is paired with that reference level, the zero crossing point of that wave is the arrival point.
An ultrasonic flowmeter, wherein an alarm is issued when the one pair is the lowest voltage pair of the plurality of pairs.
まず送信側の送受波器を発信させ、受信側送受波器の信号を入力とする受信波検知部が受信波を検知すると、それと同時に再び送信側の送受波器を発信させるようにし、これを一定回数繰り返すよう構成し、最初の送信から一定回数目の受信までの時間を測定し、その結果から到達時間を求めるようにしたもので、
前記受信波検知部は、一方が他方の一定倍の関係を持つ基準電圧レベルのペアが異なる電圧で複数組用意されていて、ある基準レベルに対し最初にそのレベルを越えた波がその基準レベルとペアになるもう一つの基準レベルも一気に越える１つのペアが存在するときその波のゼロクロスポイントを受信波検知部ポイントとするもので、
前記１つのペアが、前記複数組のペアの内、最も低い電圧のペアであるときにアラームを出すようにしたことを特徴とする超音波流量計。Also provided with at least one pair of ultrasonic transducer acting in the receiving side to the transmitting side, upstream from the downstream and downstream through the fluid flow from the upstream performs transmission and reception of ultrasonic waves, Ri by the arrival time of the respective orientation an ultrasonic flow meter for determining the flow rate,
First, the transmitter on the transmitting side is transmitted, and when the received wave detector that receives the signal from the receiver on the receiving side detects the received wave, the transmitter on the transmitting side is transmitted again at the same time. configured to repeat a certain number of times, and measure the time from when the first transmission to receive a certain number of eyes, which was to determine a travel time from the result,
The received wave detection unit is provided with a plurality of sets of reference voltage level pairs in which one of the other is a fixed multiple of the other, with different voltages, and a wave that first exceeds that level with respect to a certain reference level When there is one pair that also exceeds the other reference level that is paired with the zero cross point of the wave as the received wave detection unit point,
An ultrasonic flowmeter, wherein an alarm is issued when the one pair is the lowest voltage pair of the plurality of pairs.
まず送信側の送受波器を発信させ、受信側送受波器の信号を入力とする受信波検知部が受信波を検知すると、それと同時に再び送信側の送受波器を発信させるようにし、これを一定回数繰り返すよう構成し、最初の送信から一定回数目の受信までの時間を測定し、その結果から到達時間を求めるようにしたもので、
前記受信波検知部は、一方が他方の一定倍の電圧である関係を持つ基準電圧レベルのペアが異なる電圧で複数組用意されていて、第１回目の受信は、ある基準レベルに対し最初にそのレベルを越えた波がその基準レベルとペアになるもう一つの基準レベルも一気に越える１つのペアが存在するときその波のゼロクロスポイントを受信波検知ポイントとし、
第２回目以降の受信は、前回の送信から受信検知までの時間から一定時間を減じた時間がその回の送信から経過した時以降の最初のゼロクロスポイントを受信検知ポイントを到達ポイントとするとともに、前記１つのペアが、前記複数組のペアの内、最も低い電圧のペアであるときにアラームを出すようにしたことを特徴とする超音波流量計。Also provided with at least one pair of ultrasonic transducer acting in the receiving side to the transmitting side, upstream from the downstream and downstream through the fluid flow from the upstream performs transmission and reception of ultrasonic waves, Ri by the arrival time of the respective orientation an ultrasonic flow meter for determining the flow rate,
First, the transmitter on the transmitting side is transmitted, and when the received wave detector that receives the signal from the receiver on the receiving side detects the received wave, the transmitter on the transmitting side is transmitted again at the same time. configured to repeat a certain number of times, and measure the time from when the first transmission to receive a certain number of eyes, which was to determine a travel time from the result,
In the reception wave detection unit, a plurality of pairs of reference voltage levels having a relationship in which one is a fixed voltage of the other is prepared with different voltages, and the first reception is first performed with respect to a certain reference level. When a wave exceeding that level is paired with the reference level, and there is one pair that also exceeds the other reference level, the zero-cross point of the wave is the received wave detection point.
In the second and subsequent receptions, the first zero cross point after the time obtained by subtracting a certain time from the time from the previous transmission to the reception detection has elapsed from the transmission of that time is used as the reception detection point, An ultrasonic flowmeter, wherein an alarm is issued when the one pair is the lowest voltage pair of the plurality of pairs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002126452A JP3906107B2 (en) | 2002-04-26 | 2002-04-26 | Ultrasonic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002126452A JP3906107B2 (en) | 2002-04-26 | 2002-04-26 | Ultrasonic flow meter |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2003315123A JP2003315123A (en) | 2003-11-06 |
| JP2003315123A5 true JP2003315123A5 (en) | 2005-07-07 |
| JP3906107B2 JP3906107B2 (en) | 2007-04-18 |
Family
ID=29540862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002126452A Expired - Fee Related JP3906107B2 (en) | 2002-04-26 | 2002-04-26 | Ultrasonic flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3906107B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4595656B2 (en) * | 2005-04-28 | 2010-12-08 | パナソニック株式会社 | Fluid flow measuring device |
| CN101886939A (en) * | 2010-06-10 | 2010-11-17 | 宁波大学 | Inhibition model and inhibition method for static drift of time difference ultrasonic flowmeter |
| JP5097293B2 (en) * | 2011-10-03 | 2012-12-12 | 大阪瓦斯株式会社 | Ultrasonic meter device |
| JP6340547B2 (en) * | 2014-04-11 | 2018-06-13 | パナソニックＩｐマネジメント株式会社 | Ultrasonic flow measuring device and secular change evaluation system |
-
2002
- 2002-04-26 JP JP2002126452A patent/JP3906107B2/en not_active Expired - Fee Related
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