CN107607168A - A kind of family ultrasonic water meter adaptive approach - Google Patents
A kind of family ultrasonic water meter adaptive approach Download PDFInfo
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- CN107607168A CN107607168A CN201710609600.1A CN201710609600A CN107607168A CN 107607168 A CN107607168 A CN 107607168A CN 201710609600 A CN201710609600 A CN 201710609600A CN 107607168 A CN107607168 A CN 107607168A
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Abstract
A kind of family ultrasonic water meter mistake ripple compensation method, to prevent influence of the accidental disturbance factor to this method, using the average value repeatedly measured as basis for estimation.After continuous several times measurement, the upstream time repeatedly measured and downstream time, standard upstream time Tup and downstream time Tdn are calculated using recursive algorithm, according to formula Os=(Tdn+Tup) L*2/C, calculate Os values under normal circumstances, it is preset in MCU, because Os is not with flow velocity, temperature change, as standard, the every time relatively Os1 in measurement, when Os and Os1 are not waited, expression has occurred and that wrong ripple.Work as Os>During Os1, threshold value is relatively low, threshold value increase 1mv, remeasures.Such as Os<During Os1, threshold value is higher, and threshold value reduces 1mv, when Os is equal with Os1, increases measurement period, ultrasonic amplitude caused by this method can effectively reduce the reasons such as impurity, dirt, bubble declines.
Description
Technical field
The present invention relates to measuring instrument technical field, more particularly to the accurate measurement of family ultrasonic water meter.
Background technology
Transducer reception signal amplitude is influenceed after ultrasonic transducer fouling submerged in water it is especially big, when mixing in water
During bubble, conduction lag effects of the ultrasonic wave in different medium, the reception signal amplitude of transducer is also more big changes, this
STOP signal mistake ripples will be caused indirectly, influence metering precision.So measuring instrument for long-term use, it is ensured that make
With the accuracy of measuring in the time limit, it is a kind of can carry out self-control method it is ready to appear.
Wrong ripple phenomenon is very universal, selects a kind of suitable adaptive approach most important.
The content of the invention
It is an object of the invention to provide a kind of family ultrasonic water meter adaptive approach, ultrasonic wave can be more reasonably improved
Metering sampling precision in water.
The technical scheme of use is：
To prevent influence of the accidental disturbance factor to this method, this method is using the average value repeatedly measured as basis for estimation.
After continuous several times measurement, the upstream time repeatedly measured and downstream time are respectively obtained, standard upstream is calculated using recursive algorithm
Time Tup and downstream time Tdn, according to formula Os=(Tdn+Tup)-L*2/C, Os values under normal circumstances are calculated, are preset to
In MCU because Os is with flow velocity, temperature change, as standard, the relatively every time Os1 in measurement, when Os and Os1 not
Deng when, expression have occurred and that wrong ripple.Work as Os>During Os1, represent that threshold value is relatively low, adopted a ripple more, threshold value is increased upwards
1mv, remeasure.If Os<During Os1, represent that threshold value is higher, adopted a ripple less, threshold value is reduced into downwards 1mv, surveyed again
Amount compares.When Os is equal with Os1, measurement period is increased, reduces pendulous frequency.
It the advantage is that：
Ultrasonic amplitude caused by being effectively reduced the reasons such as impurity, dirt, bubble declines, so that wrong ripple etc. is accurate to measuring
The influence of degree.
The present invention improves measuring accuracy from software program, reduces hardware cost, while can substantially reduce power consumption.
Brief description of the drawings
Fig. 1 is the theory diagram of the embodiment of the present invention.
Embodiment
Before this compensation method is put into practice, state when instrument does not occur wrong ripple is measured with oscillograph first, is recorded now
Tdn, Tup, and Os corresponding to calculating, are set into MCU as standard value.
As shown in figure 1, this control method comprises the following steps that：
1st, after continuous 10 measurements, upstream time and the downstream time of 10 measurements are respectively obtained.Jump to step 2.
2nd, standard upstream time Tup and downstream time Tdn are calculated using recursive algorithm, jumps to step 3.
3rd, the sound path that Os1=(Tdn+Tup)-L*2/C, wherein L is two transducers is calculated, C is the velocity of sound, jumps to step 4.
4th, the Os1 differences in preset Os and this measurement in MCU are compared, if it is 0, if not step 5 is jumped to, if
Jump to step 8.
5th, compare whether the Os1 differences in MCU in preset Os and this measurement are more than 0, if jumping to step 6, if not
It is to jump to step 7.
6th, threshold value increases 1mv upwards, jumps to step 1.
7th, threshold value reduces 1mv upwards, jumps to step 1.
8th, terminate.
According to the above description, the present invention program can be realized with reference to art technology.
Claims (1)
- A kind of 1. family ultrasonic water meter mistake ripple compensation method, it is characterised in that the following steps, after continuous several times measurement, respectively To the upstream time repeatedly measured and downstream time, standard upstream time Tup and downstream time Tdn are calculated using recursive algorithm, According to formula Os=(Tdn+Tup)-L*2/C, calculate Os values under normal circumstances, be preset in MCU because Os not with flow velocity, Temperature change, so as standard, the relatively every time Os1 in measurement, when Os and Os1 is not waited, expression has occurred and that wrong ripple ；Work as Os>During Os1, represent that threshold value is relatively low, adopted a ripple more, threshold value is increased into 1mv upwards, remeasured；If Os<Os1 When, represent that threshold value is higher, adopted a ripple less, threshold value is reduced into downwards 1mv, duplicate measurements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710609600.1A CN107607168B (en) | 2017-07-25 | 2017-07-25 | Household ultrasonic water meter self-adaption method |
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| CN201710609600.1A CN107607168B (en) | 2017-07-25 | 2017-07-25 | Household ultrasonic water meter self-adaption method |
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| CN107607168A true CN107607168A (en) | 2018-01-19 |
| CN107607168B CN107607168B (en) | 2021-04-09 |
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| CN201710609600.1A Active CN107607168B (en) | 2017-07-25 | 2017-07-25 | Household ultrasonic water meter self-adaption method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782024A (en) * | 2018-12-29 | 2019-05-21 | 杭州先锋电子技术股份有限公司 | The anti-measuring error method of ultrasonic wave gas meter of wave number judgement is carried out based on stationary state parameter |
| CN112284468A (en) * | 2020-09-25 | 2021-01-29 | 湖南常德牌水表制造有限公司 | Compensation method and compensation device for flow measurement of large-caliber ultrasonic water meter |
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| CN109782024A (en) * | 2018-12-29 | 2019-05-21 | 杭州先锋电子技术股份有限公司 | The anti-measuring error method of ultrasonic wave gas meter of wave number judgement is carried out based on stationary state parameter |
| CN112284468A (en) * | 2020-09-25 | 2021-01-29 | 湖南常德牌水表制造有限公司 | Compensation method and compensation device for flow measurement of large-caliber ultrasonic water meter |
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|---|---|
| CN107607168B (en) | 2021-04-09 |
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Address after: 110000 No. 68-d2, guizhuxiang street, Sujiatun District, Shenyang City, Liaoning Province Patentee after: Shuifa hangyuxing IOT Technology (Liaoning) Co.,Ltd. Address before: 110045 No. 50-1 Civilian Street, Dadong District, Shenyang City, Liaoning Province Patentee before: LIAONING HANGYUXING INSTRUMENT NETWORK TECHNOLOGY CO.,LTD. |