CN105403266B - A kind of heavy caliber Ultrasonic water meter automatically corrected and its bearing calibration - Google Patents
A kind of heavy caliber Ultrasonic water meter automatically corrected and its bearing calibration Download PDFInfo
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- CN105403266B CN105403266B CN201510942110.4A CN201510942110A CN105403266B CN 105403266 B CN105403266 B CN 105403266B CN 201510942110 A CN201510942110 A CN 201510942110A CN 105403266 B CN105403266 B CN 105403266B
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- 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
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- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of heavy caliber Ultrasonic water meter automatically corrected and its bearing calibrations, including measurement pipe, energy converter and the first signal processing unit, there is shunt jet stream water flow sensor at fluid pressure differential generating mechanism in measurement pipe, the sensor is connected with the second signal processing unit for metering, is connected between the first signal processing unit and second signal processing unit by comparing circuit.A kind of bearing calibration is also disclosed simultaneously, energy converter and the first signal processing unit are while being measured, by the obtained value of measurement and shunt jet stream water flow sensor synchronize obtained value be compared, if the two difference is greater than the set value, energy converter and the first signal processing unit are modified in the corrected value of the flow section.Compared with prior art, the present invention uses the normal flow sensor that shunt jet stream water flow sensor is used as automatic correction device, allows energy converter and its first signal processing unit due to being influenced to cause to automatically correct when measurement result generation error by each influence factor.
Description
Technical field
The invention belongs to water meter technical fields, more particularly, to a kind of heavy caliber Ultrasonic water meter automatically corrected and its correction
Method.
Background technique
With generally use of the tap water in worldwide, the water meter for water measurement amount is that tap water was popularized
Indispensable tool in journey.Currently, among measurement application of the heavy caliber Ultrasonic water meter in closed conduct is gaining popularity.
It measures with dampening and is elapsed using the time, the certain parameters of heavy caliber Ultrasonic water meter can change, its measurement is caused to miss
Difference increases, accuracy of measurement decline.As the internal diameter D of Ultrasonic water meter measurement pipe can be measured with water using time passage and quality of water supply
Bad generation fouling, causing it to measure, bore becomes smaller, deviation from circular from increases；Simultaneously as measurement pipe encrustation can also make
It obtains inner wall of the pipe relative roughness numerical value to significantly change, influences to correct result；Moreover any Ultrasonic water meter can all have " when
Drift " and the presence of " temperature drift " phenomenon, etc..The superposition of everything influence factor, the Ultrasonic water meter that correction can be made qualified use one section
After time, the error of indication changes, or even the range beyond the limits of error.Because most of user is in common flow
Water is used under big flow state near value, therefore whether measurement of the Ultrasonic water meter near common flow value accurately and reliably will be straight
It connects and influences water supply and fairness and reasonability with water both sides' trade settlement.Therefore need to invent a kind of method and apparatus,
Ultrasonic water meter can automatically be corrected its measurement result after a period of use, eliminate and make because above-mentioned influence factor exists
At measured value it is overproof.
Summary of the invention
The present invention aiming at the shortcomings in the prior art, provides a kind of heavy caliber Ultrasonic water meter automatically corrected, the water meter
Its measurement result can be corrected automatically after a period of use in Ultrasonic water meter, be eliminated because above-mentioned influence factor is deposited
And caused by measured value it is overproof.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals: it is a kind of automatically correct it is big
Bore Ultrasonic water meter, including measurement pipe are correspondingly arranged on one group of energy converter in the measurement pipe, and the energy converter, which is connected with, to be used for
The first signal processing unit of water flow is measured, there is fluid pressure differential generating mechanism in the measurement pipe, in the fluid pressure
Shunt jet stream water flow sensor is connected at power difference generating mechanism, which, which is connected with, is used for
The second signal processing unit for measuring water flow is led between first signal processing unit and the second signal processing unit
Comparison circuit is crossed to be connected.
It is sufficiently stable reliable, unwise to above-mentioned influence factor that a kind of Long-Term Properties are arranged in the present invention in Ultrasonic water meter
Sense, manufacturing cost is cheaper, has pipeline self-cleaning function but relatively narrow " the shunt water jets of flow measurement range
Flow sensor and signal processing unit " compares Ultrasonic water meter measured value near common flow value at any time, and makees to show
Value correction.Because measurement of the jet stream water flow sensor in big flow is very reliable, automatic correction device may be used as
Normal flow sensor use so that energy converter and its first signal processing unit by each influence factor due to being influenced to cause to survey
Amount result occurs to automatically correct when error.
Specifically, above-mentioned first signal processing unit includes the change-over switch being connected with the energy converter, at the same with institute
The transmit circuit and receive circuit that change-over switch is connected are stated, and connects the signal of the transmitting and receiving circuit simultaneously
Processing circuit, the signal processing circuit connect comparison circuit.
Preferably, above-mentioned fluid pressure differential generating mechanism is that the measurement pipe is made to form narrow contracting section by way of undergauge
And expanding reach, shunt jet stream water flow sensor is connected in the narrow contracting section.The fluid pressure that this programme utilizes undergauge to generate
Power difference drives the measurement work of jet stream water flow sensor.
Preferably, above-mentioned shunt jet stream water flow sensor include shunt jet stream water flow sensor ontology and
Higher-pressure region connecting tube and low-pressure area connecting tube, the higher-pressure region connecting tube connect the water inlet end of the narrow contracting section, the low-pressure area
Connecting tube connects the water outlet of the narrow contracting section.
The present invention additionally provides a kind of bearing calibration of heavy caliber Ultrasonic water meter automatically corrected simultaneously comprising following step
It is rapid: a, to commonly use the flow measurement range setting of the shunt jet stream water flow sensor near flow value；B, ultrasonic water
Table accesses water supply line in use, the energy converter measures measured flux, is in institute when measuring tested volume flow
When stating the flow measurement range of shunt jet stream water flow sensor, the energy converter will measure while carrying out water metering
Obtained volumetric flow units and the shunt jet stream water flow sensor synchronize obtained volumetric flow units be compared, if
The two difference is greater than the set value, then to the energy converter the flow section corrected valuek 1 Be modified, make the energy converter and
The body that the volumetric flow units and the shunt jet stream water flow sensor measurement that first signal processing unit measurement obtains obtain
Product flow value is identical；C, the correction of the measurement characteristic of the energy converter and the first signal processing unit is using segmentation association correction
Correction coefficient is arranged in common flow value environs in methodk 1, correction coefficient is respectively set in other flow measurement rangesk 2、k 3, andk 1Withk 2、k 3, between all have correlation, when discovery measurement characteristic change when, as long as rightk 1
Make amendment, so that it may be modified automatically to other correction coefficient, to realize the school to the measurement result of other range of flows
Just.
This method is realized using shunt jet stream water flow sensor as flux modification standard to Ultrasonic water meter transducing
What device and the first signal processing unit measured automatically corrects, and is realized by segmentation association correction method within the scope of full flow
The correction of measurement result.Certain above-mentioned correction coefficientk 2、k 3, to need the Ultrasonic water meter for different structure to pass through a large amount of
Experiment finds mutual relationship to determine.
In order to achieve better technical results, further technical measures further include: in access water supply line before use, right
The indicating value of the shunt jet stream water flow sensor is corrected, and makes the shunt jet stream water flow sensor in common stream
The error of indication near magnitude as far as possible close to zero, measurement reproducibility reach the 1/5 of water meter limits of error absolute value with
It is interior.
Preferably, above-mentioned second signal processing unit is calculated when calculating volumetric flow units using following formula: , in formula,d - related with fluidic oscillation cavity characteristic size parameter；S- fluidic oscillation cavity
Water inlet jet port sectional area；Sr- Si Telaohaer (Strouhal) number；f Fluid oscillating frequency in-fluidic oscillation cavity；K 1、K 2- it is respectively fluidic oscillation cavity regulation coefficient and differential pressure measurement pipe regulation coefficient；To establish jet stream metering oscillation chamber
Intracorporal frequency of oscillationf Corresponding relationship between measured flux.By changing second signal processing unit to the meter of water flow
Calculation mode, so that shunt jet stream water flow sensor is suitable for the mounting structure of water meter of the present invention.
Specifically, above-mentioned formula is obtained by following steps: according to Bernoulli Jacob's fluid energy equation, being had；, therefore can obtain, and due to being jet stream water flow sensor, have,
Therefore, thus, = ；In formula,q v1、q v2、q v - point
Total stream in the shunt volume of fluidic oscillation cavity, the shunt volume for flowing into differential pressure measurement pipe low-pressure area and measurement pipeline Wei not flowed into
Amount；ΔP The pressure difference of height pressure area in-measurement pipe；ρ- detected fluid density.
The beneficial effects of the present invention are: compared with prior art, a kind of long-time service is arranged in the present invention in Ultrasonic water meter
Performance it is sufficiently stable it is reliable, insensitive to above-mentioned influence factor, manufacturing cost is cheaper, have pipeline self-cleaning function but
Flow measurement range is relatively narrow " shunt jet stream water flow sensor and signal processing unit ", near common flow value
Ultrasonic water meter measured value is compared at any time, and makees indicating value correction.Because of survey of the jet stream water flow sensor in big flow
Normal flow sensor use that is very reliable, therefore may be used as automatic correction device is measured, so that energy converter and its first letter
Number processing unit causes measurement result that can automatically correct when error occurs due to being influenced by each influence factor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is shunt jet stream water flow sensor operation principle schematic diagram.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
Embodiment 1: referring to figure 1 and figure 2, a kind of heavy caliber Ultrasonic water meter automatically corrected, including measurement pipe 1, institute
It states and is correspondingly arranged on one group of energy converter 2 in measurement pipe 1, the energy converter 2 is connected at the first signal for measuring water flow
Unit is managed, there is fluid pressure differential generating mechanism in the measurement pipe 1, the fluid pressure differential generating mechanism is to pass through undergauge
Mode makes the measurement pipe 1 form narrow contracting section 11 and expanding reach 12, is connected with shunt jet stream water flow in the narrow contracting section 11
Sensor 3, the shunt jet stream water flow sensor 3 include shunt jet stream water flow sensor ontology 31 and higher-pressure region
Connecting tube 32 and low-pressure area connecting tube 33, the higher-pressure region connecting tube 32 connect the water inlet end of the narrow contracting section 11, the low pressure
Area's connecting tube 33 connects the water outlet of the narrow contracting section 11, which is connected with for measuring water
The second signal processing unit 4 of flow passes through ratio between first signal processing unit and the second signal processing unit 4
It is connected compared with circuit 5.
Wherein, first signal processing unit includes the change-over switch 61 being connected with the energy converter 2, at the same with institute
The transmit circuit 62 and receive circuit 63 that change-over switch 61 is connected are stated, and connects the transmit circuit 62 simultaneously and receives electricity
The signal processing circuit 64 on road 63, the signal processing circuit 64 connect comparison circuit 5.
A kind of bearing calibration of the heavy caliber Ultrasonic water meter automatically corrected, comprising the following steps: a, accessing water supply line
Before use, being corrected to the indicating value of the shunt jet stream water flow sensor 3, make the shunt water jets flow sensing
It is absolute that the error of indication of the device 3 near common flow value reaches the water meter limits of error close to zero, measurement reproducibility as far as possible
It is b within the 1/5 of value, the setting of the flow measurement range of the shunt jet stream water flow sensor 3 is attached in common flow value
Closely；C, Ultrasonic water meter accesses water supply line in use, the energy converter 2 and the first signal processing unit survey measured flux
Amount, it is described to change when measuring tested volume flow and being in the flow measurement range of the shunt jet stream water flow sensor 3
The volumetric flow units and the shunt that energy device 2 and the first signal processing unit obtain measurement while carrying out water metering
The volumetric flow units that jet stream water flow sensor 3 synchronizes are compared, if the two difference is greater than the set value, to described
Corrected value of the energy converter 2 in the flow sectionk 1It is modified, obtains the energy converter 2 and the first signal processing unit measurement
The obtained volumetric flow units of volumetric flow units and the shunt jet stream water flow sensor 3 measurement it is identical；D, the transducing
The correction of the measurement characteristic of device 2 and the first signal processing unit is using segmentation association correction method, i.e., the model near common flow value
Enclose interior setting correction coefficientk 1, correction coefficient is respectively set in other flow measurement rangesk 2、k 3, andk 1Withk 2、k 3, between all have correlation, when discovery measurement characteristic change when, as long as rightk 1Make amendment, so that it may automatic
Other correction coefficient are modified, to realize the correction to the measurement result of other range of flows.
Wherein, the second signal processing unit 4 is calculated when calculating volumetric flow units using following formula: , in formula,d - related with fluidic oscillation cavity characteristic size parameter；SThe water inlet of-fluidic oscillation cavity
Jet port sectional area；Sr- Si Telaohaer (Strouhal) number；f Fluid oscillating frequency in-fluidic oscillation cavity；K 1、K 2
- it is respectively fluidic oscillation cavity regulation coefficient and differential pressure measurement pipe regulation coefficient；To establish in jet stream metering oscillation cavity
Frequency of oscillationf Corresponding relationship between measured flux.
Above-mentioned formula is obtained by following steps: due to；, therefore can obtain,
And due to, therefore, thus, = ；In formula,q v1、q v2 、q v - it is respectively the shunt volume for flowing into fluidic oscillation cavity, the shunt volume for flowing into differential pressure measurement pipe low-pressure area and measurement
Total flow in pipeline；ΔPThe pressure difference of height pressure area in-measurement pipe；ρ- detected fluid density.
Claims (7)
1. a kind of heavy caliber Ultrasonic water meter automatically corrected, including measurement pipe (1), one is correspondingly arranged on the measurement pipe (1)
Group energy converter (2), the energy converter (2) are connected with the first signal processing unit for measuring water flow, it is characterised in that: institute
Stating has fluid pressure differential generating mechanism in measurement pipe (1), be connected with shunt at the fluid pressure differential generating mechanism and penetrate
Flowing water flow sensor (3), the shunt jet stream water flow sensor (3) are connected at the second signal for measuring water flow
It manages unit (4), by comparing circuit (5) phase between first signal processing unit and the second signal processing unit (4)
Connection；Its bearing calibration is the following steps are included: a, set the flow measurement range of the shunt jet stream water flow sensor (3)
It sets near common flow value；B, Ultrasonic water meter accesses water supply line in use, the energy converter (2) and the first signal processing list
Member measures measured flux, is in the shunt jet stream water flow sensor (3) when measuring tested volume flow
When flow measurement range, the energy converter (2) and the first signal processing unit obtain measurement while carrying out water metering
Volumetric flow units and the shunt jet stream water flow sensor (3) synchronize obtained volumetric flow units be compared, if two
Person's difference is greater than the set value, then to the energy converter (2) and the first signal processing unit the flow section corrected value k1It carries out
Amendment, the volumetric flow units and the shunt jet stream for obtaining the measurement of the energy converter (2) and the first signal processing unit
The volumetric flow units that water flow sensor (3) measurement obtains are identical；C, the survey of the energy converter (2) and the first signal processing unit
Correction coefficient k is arranged using segmentation association correction method in the correction of flow characteristic that is, in common flow value environs1, other streams
Correction coefficient k is respectively set in measurement range2、k3, and k1With k2、k3, between all have correlation, work as hair
When now measurement characteristic changes, as long as to k1Make amendment, so that it may be modified automatically to other correction coefficient, to realize
Correction to the measurement result of other range of flows.
2. a kind of heavy caliber Ultrasonic water meter automatically corrected according to claim 1, it is characterised in that: first signal
Processing unit includes the change-over switch (61) being connected with the energy converter (2), while being connected with the change-over switch (61)
Transmit circuit (62) and receive circuit (63), and connect simultaneously the transmit circuit (62) and receive circuit (63) signal
Processing circuit (64), the signal processing circuit (64) connect comparison circuit (5).
3. a kind of heavy caliber Ultrasonic water meter automatically corrected according to claim 2, it is characterised in that: the Fluid pressure
Poor generating mechanism is that the measurement pipe (1) is made to form narrow contracting section (11) and expanding reach (12) by way of undergauge, described narrow
Contracting section (11) is connected with shunt jet stream water flow sensor (3).
4. a kind of heavy caliber Ultrasonic water meter automatically corrected according to claim 3, it is characterised in that: the shunt is penetrated
Flowing water flow sensor (3) includes shunt jet stream water flow sensor ontology (31) and higher-pressure region connecting tube (32) and low pressure
Area's connecting tube (33), the higher-pressure region connecting tube (32) connect the water inlet end of the narrow contracting section (11), the low-pressure area connecting tube
(33) water outlet of the narrow contracting section (11) is connected.
5. a kind of heavy caliber Ultrasonic water meter automatically corrected according to claim 1, it is characterised in that: in access water supplying pipe
Road makes the shunt jet stream water flow before use, be corrected to the indicating value of the shunt jet stream water flow sensor (3)
The error of indication of the sensor (3) near common flow value reaches the maximum allowable mistake of water meter close to zero, measurement reproducibility as far as possible
Within the 1/5 of poor absolute value.
6. the heavy caliber Ultrasonic water meter according to claim 5 automatically corrected, it is characterised in that: the second signal processing
Unit 4 is calculated when calculating volumetric flow units using following formula:
In formula, qv- volumetric flow units；D-ginseng related with fluidic oscillation cavity characteristic size
Number；S-fluidic oscillation cavity water inlet jet port sectional area；Sr-Si Telaohaer (Strouhal) number；F-fluidic oscillation cavity
Interior fluid oscillating frequency；K1、K2- it is respectively fluidic oscillation cavity regulation coefficient and differential pressure measurement pipe regulation coefficient；To establish
Corresponding relationship between the intracorporal frequency of oscillation f of jet stream metering oscillation chamber and measured flux.
7. a kind of heavy caliber Ultrasonic water meter automatically corrected according to claim 6, it is characterised in that: the formula is by such as
Lower step obtains: due toTherefore it can obtainAnd due toThereforeTo,In formula, qv1、
qv2、qv- it is respectively the shunt volume for flowing into fluidic oscillation cavity, the shunt volume for flowing into differential pressure measurement pipe low-pressure area and measurement pipeline
Interior total flow；The pressure difference of height pressure area in Δ P-measurement pipe；ρ-detected fluid density.
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| CN106706048B (en) * | 2016-12-19 | 2019-03-29 | 浙江大学 | A kind of flowermeter based on liquid level fluidic oscillation |
| EP3388794B2 (en) * | 2017-04-13 | 2022-03-09 | SICK Engineering GmbH | Measuring device for measuring a flow speed of a fluid |
| CN109276136A (en) * | 2018-08-07 | 2019-01-29 | 北京云迹科技有限公司 | Sump water monitoring method and device |
| CN112179440A (en) * | 2020-10-12 | 2021-01-05 | 危文强 | Intelligent water meter capable of accurately uploading data and water consumption record uploading method |
| FR3118662A1 (en) * | 2021-01-04 | 2022-07-08 | Sagemcom Energy & Telecom Sas | Correction of measurements according to the orientation of the meter |
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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. |
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