GB2021768A - Acoustic measuring instruments eg flowmeters or level gauges - Google Patents
Acoustic measuring instruments eg flowmeters or level gaugesInfo
- Publication number
- GB2021768A GB2021768A GB7916836A GB7916836A GB2021768A GB 2021768 A GB2021768 A GB 2021768A GB 7916836 A GB7916836 A GB 7916836A GB 7916836 A GB7916836 A GB 7916836A GB 2021768 A GB2021768 A GB 2021768A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acoustic wave
- signal
- pulse
- receiver
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 230000005856 abnormality Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2962—Measuring transit time of reflected waves
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Thermal Sciences (AREA)
- Measuring Volume Flow (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
An acoustic wave travels from transducers 8 along path I to receiver 9. A counter 5 supplied by controllable oscillator 1 is made to count to a predetermined count repetitively to produce signal W, and the time difference between the production of signal W and the arrival of the acoustic wave at receiver 9 (signal Z) is determined at 7, and is used to control the frequency of oscillator 1 to make the count time of counter equal to the acoustic wave transit time t whereby the frequency of oscillator 1 provides a measure of the transit time. A circuit 13 generates a pulse of predetermined width a predetermined time after signal W starts. The output t + tau of receiver 4 which detects the arrival of the acoustic wave is compared with this pulse to provide a degree of abnormality detection. If the output t + tau occurs outside this pulse, the propagation of the acoustic wave is regarded as abnormal. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5782178A JPS54149670A (en) | 1978-05-16 | 1978-05-16 | Circuit device for detecting ultrasonic wave propagating time |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2021768A true GB2021768A (en) | 1979-12-05 |
GB2021768B GB2021768B (en) | 1982-08-18 |
Family
ID=13066575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7916836A Expired GB2021768B (en) | 1978-05-16 | 1979-05-15 | Acoustic measuring instruments eg flowmeters or level gauges |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS54149670A (en) |
DE (1) | DE2920177A1 (en) |
DK (1) | DK200579A (en) |
FR (1) | FR2426248A1 (en) |
GB (1) | GB2021768B (en) |
NL (1) | NL7903821A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5359897A (en) * | 1989-08-08 | 1994-11-01 | Front Engineering Ltd. | Apparatus for determining the time taken for sound energy to cross a body of fluid in a pipe |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5752815A (en) * | 1980-09-16 | 1982-03-29 | Yokogawa Hokushin Electric Corp | Processing circuit for ultrasonic wave signal |
JPS5827086A (en) * | 1981-08-11 | 1983-02-17 | Fuji Electric Co Ltd | Ultrasonic wave propagation time detector |
DE3316630C2 (en) * | 1983-05-06 | 1985-07-25 | Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch | Device for determining the transit time of ultrasonic pulses in a fluid |
JPH0749976B2 (en) * | 1986-02-26 | 1995-05-31 | 富士電機株式会社 | Ultrasonic measuring device |
JP4538163B2 (en) * | 2001-03-30 | 2010-09-08 | サーパス工業株式会社 | Flow rate measuring method, flow rate measuring device, flow rate measuring method, and flow rate measuring device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3894431A (en) * | 1972-04-04 | 1975-07-15 | Atomic Energy Authority Uk | Apparatus for indicating fluid flow velocity |
US3818757A (en) * | 1972-05-05 | 1974-06-25 | Saratoga Sys Inc | Dual path ultrasonic fluid flow metering system and method |
JPS49130261A (en) * | 1973-04-13 | 1974-12-13 | ||
JPS5310454A (en) * | 1976-07-16 | 1978-01-30 | Nippon Kokan Kk | Apparatus for detecting change of fluid character by singgaround method |
DE2641771A1 (en) * | 1976-09-14 | 1978-03-16 | Fuji Electric Co Ltd | Time difference measuring device - compares measured time difference and reference value for ultrasonic velocimeter |
DE2641772A1 (en) * | 1976-09-14 | 1978-03-16 | Fuji Electric Co Ltd | Throughflow or current measuring instrument - has time-difference measuring instrument detecting oscillator pulses and further pulses |
JPS5829854B2 (en) * | 1977-07-26 | 1983-06-25 | 富士電機株式会社 | Ultrasonic measuring device |
-
1978
- 1978-05-16 JP JP5782178A patent/JPS54149670A/en active Pending
-
1979
- 1979-05-15 NL NL7903821A patent/NL7903821A/en not_active Application Discontinuation
- 1979-05-15 GB GB7916836A patent/GB2021768B/en not_active Expired
- 1979-05-15 DK DK200579A patent/DK200579A/en not_active Application Discontinuation
- 1979-05-16 DE DE19792920177 patent/DE2920177A1/en not_active Withdrawn
- 1979-05-16 FR FR7912503A patent/FR2426248A1/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5359897A (en) * | 1989-08-08 | 1994-11-01 | Front Engineering Ltd. | Apparatus for determining the time taken for sound energy to cross a body of fluid in a pipe |
Also Published As
Publication number | Publication date |
---|---|
JPS54149670A (en) | 1979-11-24 |
DK200579A (en) | 1979-11-17 |
GB2021768B (en) | 1982-08-18 |
NL7903821A (en) | 1979-11-20 |
DE2920177A1 (en) | 1979-11-22 |
FR2426248A1 (en) | 1979-12-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5796009A (en) | Method for measuring in a fluid with the aid of sing-around technique | |
US3641817A (en) | Ultrasonic flowmeter | |
SE446773B (en) | DETERMINE DUTY-FREE DETERMINATION OF THIN MATERIALS WEIGHT PER SURFACE OR THICKNESS AND APPARATUS FOR DUTY-FREE DETERMINATION OF THIN MATERIALS WEIGHT PER SURFACE OR THICKNESS | |
US3985022A (en) | Ultrasonic thickness measuring method and apparatus | |
US4114455A (en) | Ultrasonic velocity measuring method and apparatus | |
GB2021768A (en) | Acoustic measuring instruments eg flowmeters or level gauges | |
US3028749A (en) | Ultrasonic fluid density measuring system | |
US5442592A (en) | Ultrasonic distance meter | |
US2446937A (en) | Echo sounding indicator | |
JPS57190281A (en) | Ultrasonic wave measuring apparatus | |
US2923155A (en) | Ultrasonic flowmeter | |
GB1135231A (en) | Improvements in or relating to distance testing apparatus | |
GB784146A (en) | Improvements in or relating to sonic gas analysers | |
SU601577A1 (en) | Acoustic level meter | |
JPS5520458A (en) | Ultrasonic distance measuring unit | |
SU590608A1 (en) | Acoustic level meter | |
JPS57187609A (en) | Measuring device for decrease in wall thickness | |
JPS6242015A (en) | Temperature correcting method for ultrasonic flow meter | |
JPS55164353A (en) | Hardening characteristic measuring unit by acoustic measurement | |
JPS55152476A (en) | Measuring instrument | |
SU449326A1 (en) | Ultrasonic Pulse Range Meter | |
JPS54149669A (en) | Circuit device for detecting ultrasonic wave transmitting time | |
SU894552A1 (en) | Method of ultrasound speed determination | |
SU432381A1 (en) | Device for controlling quality of materials by propagation time of ultrasonic oscillations | |
JPS5555217A (en) | Ultrasonic flowmeter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |