CN202836633U - Impeller type wide-range electronic water meter - Google Patents
Impeller type wide-range electronic water meter Download PDFInfo
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- CN202836633U CN202836633U CN201220480572.0U CN201220480572U CN202836633U CN 202836633 U CN202836633 U CN 202836633U CN 201220480572 U CN201220480572 U CN 201220480572U CN 202836633 U CN202836633 U CN 202836633U
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- water meter
- embedded microcomputer
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- wide range
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Abstract
The utility model discloses an impeller type wide-range electronic water meter which comprises a water meter body. The impeller type wide-range electronic water meter is characterized in that an electro-mechanical transformation device is arranged on the water meter body and used for measuring the rotating speed of an impeller of the water meter; the electro-mechanical transformation device is connected with a signal preprocessing component which is used for receiving pulse signals output by the electro-mechanical transformation device and preprocessing the pulse signals; the signal preprocessing component is connected with an embedded microcomputer which computes and corrects data processed by the signal preprocessing component; and the embedded microcomputer is connected with an electronic displayer which is used for displaying measuring results corrected by the embedded microcomputer. Compared with the prior art, the metering performance and the using function of the impeller type wide-range electronic water meter after correction are greatly improved.
Description
Technical field
The invention belongs to the technical field of water meter, is a kind of vane type wide range electron water meter concretely.
Background technology
The water meter technology is fast-developing in recent years, is mainly reflected in the lifting of flow measurement performance and the aspects such as expansion of use function.The quality of flow measurement performance is (namely to commonly use flow Q by measurement range
3With minimum flow Q
1Ratio) and the index such as the limits of error determine.In order to guarantee that water meter satisfies the accuracy of measurement requirement in utmost point wide region, traditional wing type meter is helpless.At present the flow measurement range of most domestic mechanical water meter is between R=50～250, and the measurement range ratio of the wing type meter of external built-in embedded computer system has surpassed 1000 times, have in addition reached 1600 times.
Current water meter standard has covered three classes such as traditional mechanical water meter, electronic device water meter and electronic water meter.Electronic water meter is a kind of very promising new water meter because flow sensor adopts machinery-free motion structure and signal processing technology, but because its sensing and signal processing technology are relatively complicated, therefore need to drop into more resource and carry out research and development; The electronic device water meter is to increase the another kind of new water meter that electromechanical transformation apparatus and signal are processed software and hardware structure on original mechanical water meter basis, it can be by the mature technology of impeller and piston-type underwater flow sensor, within a short period of time, just traditional mechanical water meter can be transformed into the high performance water meter of wide-range or utmost point wide-range with less input, this is the higher lifting scheme of present cost performance.
Summary of the invention
The present invention is directed to deficiency of the prior art, a kind of vane type wide range electron water meter is provided.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals: a kind of vane type wide range electron water meter, comprise water meter, and it is characterized in that: be provided with on the described water meter for the electromechanical transformation apparatus of measuring the water meter turbine rotating speed; Described electromechanical transformation apparatus is connected be used to the pulse signal that receives described electromechanical transformation apparatus output and to this signal and carries out pretreated Signal Pretreatment parts; Described Signal Pretreatment parts are connected with embedded microcomputer, and the data after this embedded microcomputer is processed described Signal Pretreatment parts are calculated and proofreaied and correct; Described embedded microcomputer is connected with for the electronic console that shows the measurement result after described embedded microcomputer is proofreaied and correct.The present invention increases data-collection parts, embedded computer system and characteristic correction algorithm etc. at traditional mechanical water meter and has obviously promoted water meter comprehensive technical level of the present invention.Although cost increases to some extent, water meter measurement performance and use function have had large increase.
Specifically, above-mentioned electromechanical transformation apparatus adopts inductance sensing mode, and it adopts inductance element in the LC resonant tank and position between the tested metal parts to change its inductance value is changed, and then change oscillation circuit output amplitude.The manner is contactless sensing mode, and this mode can weaken in extraneous magnetic interference and the measured medium iron impurity to the impact of impeller work, has that sensor construction is simple, the reliable advantage of working stability.
In order to obtain better beneficial effect, further technical measures also comprise: above-mentioned embedded microcomputer also is connected with radio receiving transmitting module.Therefore said structure can carry out by wireless or wired transceiver module teletransmission and the observing and controlling of measurement data so that water meter of the present invention has electric signal output and receiving function, and long term is accessible Internet of Things also.
Further improve: above-mentioned embedded microcomputer also is provided with input interface and output interface.
The present invention also provides a kind of error calibration method of above-mentioned vane type wide range electron water meter simultaneously, and it may further comprise the steps:
A) in flow measurement range by real flow measurement, calculating, draw water meter initial error curve map; Select n flow point as the foundation of dividing between correction zone at graph of errors,
B) measure the impeller speed of water meter under real stream condition as the flow cut off value between described correction zone at described n flow point, its computing formula is as follows:
In the formula, S
iThe actual speed rate that represents each flow point impeller; M
ZiBe illustrated in T
ZiThe umber of pulse that records in the Measuring Time section
C) step-up error table of corrections in storer sees the following form.Each k
iValue and correction coefficient W
iDetermine with real flow measurement;
| Q | Q≤S 1 | S 1＜Q≤S 2 | S 2＜Q≤S 3 | ... | S i＜Q≤S i+1 | ... | Q＞S n+1 |
| k | k 1 | k 2 | k 3 | ... | k i | ... | k n |
| W | W 1 | W 2 | W 3 | W i | W n+1 |
D) measure also calculating sampling cycle T
iInterior t
iThe equivalent flow value Q of time period, it can pass through formula
Calculate; After flow is judged, determine between correction zone, and from the respective stored space of error correction table, find corresponding k
iValue and correction coefficient W
i
E) at sampling period T
iM is counted in interior measurement and pile-up pulse
i, then in conjunction with k
iValue calculates initial volume value between correction zone, and its computing formula is: V
i=M
iK
i
F) at last by the measurement result after the following formula acquisition correction: V
Ii=V
iW
i, and the result shown at described electronic console, simultaneously it is deposited in described embedded microcomputer, continue accumulating operation with next sampled result.
Correction principle of the present invention is as follows: when discharge in the pipeline when the mechanical water meter impeller, wheel speed will change with the discharge size, and rotating speed speed and measured flux are in proportion.The watermeter flowing rate measurement characteristics is mainly determined by instrument coefficient, sees following formula
K in the formula
i-certain flow point instrument coefficient; N
i-corresponding discharge point water meter turbine rotating speed; Q
iThe flow value of-certain flow point.
Ideally, the water meter instrument coefficient is constant in the whole flow measurement range, and this moment, its N-Q characteristic was straight line; The water meter characteristic is curve under the actual conditions, and namely its instrument coefficient changes on the different flow point in flow measurement range.
Usually, not calibrated water meter characteristic can cause its graph of errors crooked synchronously, so the part measured value just might exceed the boundary of limits of error ε.
At water meter turbine the data-collection parts are set, the vane rotary amount can be converted to the pulsed quantity of output.Integrated flux V is called pulse equivalency k with the ratio that M is counted in pile-up pulse, i.e. the volume that reflects of unit pulse.By record pile-up pulse number with obtain the pulse equivalency value of failing to be sold at auction fixed through real, the integrated flux that can ask, i.e. actual used water amount V,
V=Mk
Because at certain flow Q
iUnder the measuring condition, total revolution n of impeller elapsed time t
i(n
i=N
It) count M with pile-up pulse
iBe directly proportional (only relevant with the umber of pulse of impeller revolution output), therefore have
V
i∝n
ik
i
Because
Again because
So
V in the formula
iRepresent certain flow point Q
iThe bulking value of trying to achieve;
Therefore, as long as adjust instrument coefficient K
iOr pulse equivalency k
i, can proofread and correct the actual measured value of water meter.
Preferably, the quantity of flow point described in the above-mentioned steps a is 5 to 25.In general, at the flow separation Ying Mi of the large region division of curvilinear motion, otherwise then dredge.
In order to obtain better technique effect, each described flow point is all measured more than 3 times, then obtains the average error value of each flow point, draws the water meter error curve diagram again.
Compared with prior art, the present invention has following beneficial effect: water meter model machine of the present invention is processed and the checking of real flow measurement through characteristic correction, its flow measurement range (i.e. flow commonly used and minimum flow ratio) has surpassed 1000 times, low region measurement scope ratio has reached 1.6 times, the limits of error satisfy the requirement of water meter product inner controlling standard of enterprise fully, and the overall performance leading indicator has reached Foreign Advanced Lerel.
Increase data-collection parts, embedded computer system and characteristic correction algorithm etc. at traditional mechanical water meter and obviously promoted water meter comprehensive technical level of the present invention.Although cost increases to some extent, water meter measurement performance and use function have had large increase.Simultaneously, because water meter of the present invention has the electric signal output function, therefore can carry out by wireless or wired transceiver module teletransmission and the observing and controlling of measurement data, long term is accessible Internet of Things also.
Description of drawings
Fig. 1 is the principle of work synoptic diagram of the embodiment of the invention 1.
Fig. 2 is the inductance sensing mode schematic diagram of the embodiment of the invention 1.
Fig. 3 is the output state figure of the impeller location of the embodiment of the invention 1 inductance element when changing.
Fig. 4 is that water meter is measured the sampling time sequence synoptic diagram in the embodiment of the invention 2.
Fig. 5 is water meter measurement and correction process flow block diagram in the embodiment of the invention 2.
Embodiment
See Fig. 1, a kind of vane type wide range electron water meter comprises water meter, is provided with on the described water meter for the electromechanical transformation apparatus of measuring the water meter turbine rotating speed; Described electromechanical transformation apparatus is connected be used to the pulse signal that receives described electromechanical transformation apparatus output and to this signal and carries out pretreated Signal Pretreatment parts; Described Signal Pretreatment parts are connected with embedded microcomputer, and this embedded microcomputer is provided with input interface and output interface, and the data after this embedded microcomputer is processed described Signal Pretreatment parts are calculated and proofreaied and correct; Described embedded microcomputer is connected with for the electronic console and the radio receiving transmitting module that show the measurement result after described embedded microcomputer is proofreaied and correct.
Described electromechanical transformation apparatus adopts inductance sensing mode, and it adopts inductance element in the LC resonant tank and position between the tested metal parts to change its inductance value is changed, and then change oscillation circuit output amplitude.Its principle of work and the course of work are as follows: see Fig. 2, metal material zone a appears at inductance component L on impeller
1Or L
2The below time, make the very fast decay of its amplitude because the wave of oscillation produces current vortex at sheet metal, obvious damped oscillation occurs in the LC loop; And the regional b that works as without metal material appears at inductance component L
1Or L
2The below time, the wave of oscillation is subjected to the impact of current vortex less, the LC loop is in accurate damped oscillation state, its amplitude fading is more much smaller than the former.
Can be designated as state 0 to the damped oscillation output of inductance element when the regional a, the accurate damping output when regional b is designated as state 1.Because using two LC oscillators (two inductance component L to be arranged namely in the design
1And L
2), so when wheel rotation one turned, inductance sensing mode was met the level combination of output one of four states together, sees Fig. 3.If output state change order be 01,11,10,00,, can set impeller is forward; If output state change order be 00,10,11,01,, then can set impeller and be counter-rotating.
A kind of error calibration method of vane type wide range electron water meter, it may further comprise the steps:
A) select 5 to 25 flow points as the foundation of dividing between correction zone in the watermeter flowing rate measurement range, each described flow point is all measured 3 times, then obtains the average error value of each flow point, draws the water meter error curve diagram again;
B) measure the impeller speed of water meter under real stream condition as the flow cut off value between described correction zone at described n flow point, its computing formula is as follows:
In the formula, S
iThe actual speed rate that represents each flow point impeller; M
ZiBe illustrated in T
ZiThe umber of pulse that records in the Measuring Time section
C) step-up error table of corrections in storer sees the following form.Each k
iValue and correction coefficient W
iDetermine with real flow measurement;
| Q | Q≤S 1 | S 1＜Q≤S 2 | S 2＜Q≤S 3 | ... | S i＜Q≤S i+1 | ... | Q＞S n+1 |
| k | k 1 | k 2 | k 3 | ... | k i | ... | k n |
| W | W 1 | W 2 | W 3 | ... | W i | ... | W n+1 |
D) measure also calculating sampling cycle T
iInterior t
iThe equivalent flow value Q of time period, it can pass through formula
Calculate; After flow is judged, determine between correction zone, and from the respective stored space of error correction table, find corresponding k
iValue and correction coefficient W
i
E) at sampling period T
iM is counted in interior measurement and pile-up pulse
i, then in conjunction with k
iValue calculates initial volume value between correction zone, and its computing formula is: V
i=M
iK
i
F) at last by the measurement result after the following formula acquisition correction: V
Ii=V
iW
i, and the result shown at described electronic console, simultaneously it is deposited in described embedded microcomputer, continue accumulating operation with next sampled result.
Claims (4)
1. a vane type wide range electron water meter comprises water meter, it is characterized in that: be provided with on the described water meter for the electromechanical transformation apparatus of measuring the water meter turbine rotating speed; Described electromechanical transformation apparatus is connected be used to the pulse signal that receives described electromechanical transformation apparatus output and to this signal and carries out pretreated Signal Pretreatment parts; Described Signal Pretreatment parts are connected with embedded microcomputer, and the data after this embedded microcomputer is processed described Signal Pretreatment parts are calculated and proofreaied and correct; Described embedded microcomputer is connected with for the electronic console that shows the measurement result after described embedded microcomputer is proofreaied and correct.
2. a kind of vane type wide range electron water meter according to claim 1 is characterized in that: described electromechanical transformation apparatus adopts inductance sensing mode, and it adopts
LCInductance element and be installed in position between the tested rotating part on the water meter and change its inductance value is changed in the resonant tank, and then change the oscillation circuit output amplitude.
3. a kind of vane type wide range electron water meter according to claim 1, it is characterized in that: described embedded microcomputer also is connected with radio receiving transmitting module.
4. a kind of vane type wide range electron water meter according to claim 2, it is characterized in that: described embedded microcomputer also is provided with input interface and output interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220480572.0U CN202836633U (en) | 2012-09-19 | 2012-09-19 | Impeller type wide-range electronic water meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220480572.0U CN202836633U (en) | 2012-09-19 | 2012-09-19 | Impeller type wide-range electronic water meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202836633U true CN202836633U (en) | 2013-03-27 |
Family
ID=47948318
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220480572.0U Expired - Lifetime CN202836633U (en) | 2012-09-19 | 2012-09-19 | Impeller type wide-range electronic water meter |
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|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879041A (en) * | 2012-09-19 | 2013-01-16 | 宁波水表股份有限公司 | Impeller type wide range electronic water gauge and calibrating method thereof |
| CN106153159A (en) * | 2016-07-19 | 2016-11-23 | 天津市炳华节能技术有限公司 | A kind of mechanical type remote transmitting water meter electromechanics synchronous detecting line |
| CN110307885A (en) * | 2019-07-25 | 2019-10-08 | 福建上润精密仪器有限公司 | The metering method of more accurate intellectual water meter flow |
-
2012
- 2012-09-19 CN CN201220480572.0U patent/CN202836633U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879041A (en) * | 2012-09-19 | 2013-01-16 | 宁波水表股份有限公司 | Impeller type wide range electronic water gauge and calibrating method thereof |
| CN106153159A (en) * | 2016-07-19 | 2016-11-23 | 天津市炳华节能技术有限公司 | A kind of mechanical type remote transmitting water meter electromechanics synchronous detecting line |
| CN110307885A (en) * | 2019-07-25 | 2019-10-08 | 福建上润精密仪器有限公司 | The metering method of more accurate intellectual water meter flow |
| CN110307885B (en) * | 2019-07-25 | 2020-09-04 | 福建上润精密仪器有限公司 | More accurate intelligent water meter flow metering method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: NINGBO HAOSHIDA INSTRUMENT TECHNOLOGY CO., LTD. Effective date: 20150402 |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150402 Address after: Hongxing Road Jiangbei District 315032 Zhejiang city of Ningbo province No. 355 Patentee after: NINGBO WATER METER Co.,Ltd. Address before: 315032 Zhejiang Province, Ningbo Jiangbei District North Sea Road 268 Lane 99 Patentee before: NINGBO WATER METER Co.,Ltd. Patentee before: NINGBO HAOSHIDA INSTRUMENT TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hongxing Road Jiangbei District 315032 Zhejiang city of Ningbo province No. 355 Patentee after: Ningbo water meter (Group) Co.,Ltd. Address before: Hongxing Road Jiangbei District 315032 Zhejiang city of Ningbo province No. 355 Patentee before: NINGBO WATER METER Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |