CN108885129A - Method for monitoring ultrasonic flowmeter - Google Patents
Method for monitoring ultrasonic flowmeter Download PDFInfo
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- CN108885129A CN108885129A CN201680083458.5A CN201680083458A CN108885129A CN 108885129 A CN108885129 A CN 108885129A CN 201680083458 A CN201680083458 A CN 201680083458A CN 108885129 A CN108885129 A CN 108885129A
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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
Abstract
The present invention relates to a kind of methods for monitoring ultrasonic flowmeter (1), and this approach includes the following steps：Reference fingerprint is generated, which includes one or more initial system parameters of the ultrasonic flowmeter (1)；And when using ultrasonic flowmeter (1), reference fingerprint generated is compared with the same system parameter currently measured.According to the present invention, generate the reference number sample of initial ultrasound signal, to generate the data of the reference fingerprint, the initial ultrasound signal is sent and received by the ultrasonic flowmeter (1), and transmitted received (Rx) the initial ultrasound signal of (Tx) and/or institute carries out digital sample by the ultrasonic flowmeter (1), to obtain Tx and/or Rx reference number sample respectively.
Description
Technical field
The present invention relates to a kind of methods for monitoring ultrasonic flowmeter, and this approach includes the following steps：Reference is generated to refer to
Line, the reference fingerprint include one or more initial system parameters of the ultrasonic flowmeter；And works as and use the ultrasonic flowmeter
When, reference fingerprint generated is compared with the same system parameter currently measured.In addition, the present invention relates to ultrasounds
Flowmeter is adapted to execute the method for monitoring the ultrasonic flowmeter.
Background technique
In the ultrasonic flowmeter based on transmission time difference principle, pass through volume flow rate q and the phase in flow tube of flowmeter
To between the transmission time of the first transducer of placement with the ultrasonic signal of the upstream and downstream transmission between second transducer
Time difference Δ t, speed of sound c and overall sensor geometry constant K are directly proportional：
Therefore, the quality of flow measurement directly depends on the accuracy of these three factors K, Δ t and c.
Constant K can be determined during producing traffic alignment, and therefore only need over time to be constant.K can
To include the characteristic of overall sensor geometry, preferably transducer position, acoustic beam pattern, sound reflection from energy converter
The geometry of device angle, the sound property of lining and fixed device materials or Spool piece, flowing lining and fixed device.
C is measured indirectly frequently by relationship known between speed of sound c and the temperature of flow media.Therefore, c
Accuracy depend on the temperature sensor of ultrasonic flowmeter, ultrasonic flowmeter electronic device temperature measuring circuit and flow through
The medium of ultrasonic flowmeter.
The accuracy of time difference measurements Δ t depends primarily on the time measuring circuit in the electronic component of ultrasonic flowmeter.
In order to detect the variation of influence K, Δ t and c that may need to recalibrate or safeguard ultrasonic flowmeter, it is known that right
Ultrasonic flowmeter uses fingerprint recognition.It is thus known that generate reference fingerprint, the reference fingerprint include one of ultrasonic flowmeter or
Multiple initial system parameters；And when using ultrasonic flow rate timing, by reference fingerprint generated and the current phase measured
Homologous ray parameter is compared.This allows to provide a kind of method, can detecte K by this method or for time of measuring difference and temperature
Whether any measuring circuit of degree has changed over time, and therefore can diagnose possible flowmeter inaccuracy.
Summary of the invention
The object of the present invention is to provide a kind of method for monitoring ultrasonic flowmeter, this method allows easily fingerprint knowledge
Other and monitoring ultrasonic flowmeter.
It is solved in this way the purpose of the present invention is the method according to described in introductory song：This approach includes the following steps：It generates
The reference number sample of initial ultrasound signal, to generate the data of the reference fingerprint, the initial ultrasound signal is by the hypersonic flow
Meter sends and receives, and transmitted received (also referred to as Rx) the initial ultrasound signal of (also referred to as Tx) and/or institute
Digital sample is carried out by the ultrasonic flowmeter, to obtain Tx and/or Rx reference number sample respectively.
In this context, Tx and Rx refers to the derived signal from transducer signal, and is changed across the two
The Tx signal and Rx signal of energy device.
Allow according to the method for the present invention using ultrasonic flowmeter to carry out self-monitoring.Allow according to the method for the present invention
Reference fingerprint is generated, and allows for reference fingerprint to be compared with current system parameter, so as to only by using having included
Measuring circuit in ultrasonic flowmeter monitors ultrasonic flowmeter function, and there is no need to use any external equipment.
Preferably, ultrasonic flowmeter includes the first ultrasonic transducer and the second ultrasonic transducer, and initial ultrasound signal is the
It is sent between one ultrasonic transducer and the second ultrasonic transducer, and Tx and/or Rx initial ultrasound signal is by ultrasonic flowmeter
Analog-digital converter sampled, to obtain Tx and/or Rx reference number sample respectively.Preferably, analog-digital converter is to use
A part of the electronic circuit of transmission time is extracted from ultrasonic signal during the use in ultrasonic flowmeter.Therefore, identical
Analog-digital converter can be used for a variety of purposes, thus allow easily monitor ultrasonic flowmeter at lower cost.However, at this
In some embodiments of invention, other than the analog-digital converter for extracting transmission time, provided in ultrasonic flowmeter single
Only analog-digital converter is to obtain Tx and/or Rx reference number sample.Preferably, for obtaining the modulus of reference number sample
Converter is a part of the microcontroller of ultrasonic flowmeter.Preferably, number of the initial ultrasound signal in one or more series
It is sampled in printed words sheet, each series has preferably identical sample frequency, has opening relative to the super wave acoustic signals of transmission
The independent time started and/or each series begun have individual sample frequency.This allows under conditions of ultrasonic signal is constant
The over-sampling resolution information extracted from initial ultrasound signal is obtained using the analog-digital converter of lack sampling.Preferably, will
The numeral sample of multiple series is combined digitally to reconstruct the characteristic of initial ultrasound signal, which, which should be stored in refer to, refers to
In line.Preferably, transmitted initial ultrasound signal and a received initial ultrasound signal are both digitally sampled, and needle
To each of the two, initial number sample is generated.
Preferably, this method includes monitoring ultrasonic flow rate using the reference number sample of Tx and/or Rx ultrasonic signal
The step of counting geometry variation.Ultrasonic flowmeter has flowmeter geometry, which passes through hypersonic flow by influencing
The constant K of the calculating of the volume flow rate q of meter is described, as explained before.K includes that the system of ultrasonic flowmeter geometry is special
Property, preferably transducer position, the acoustic beam pattern from energy converter, sound baffle angle, lining and fixed device materials
Sound property, Spool piece, the geometry of flowing lining and fixed device and other systems parameter sometimes.Believed using ultrasound
Number Tx and/or Rx reference number sample come monitor ultrasonic flowmeter geometry therefore allow detect constant K time correlation
Variation, which may be the mark of flowmeter inaccuracy.Therefore, the variation of ultrasonic flowmeter geometry and therefore K
Variation may cause the recalibration or reparation of ultrasonic flowmeter.Therefore, come using Rx and/or Tx reference number sample indirect
The variation of ground monitoring ultrasonic flowmeter geometry over time can provide a kind of possible flowmeter inaccuracy of detection
Easy method.
In a preferred method, this approach includes the following steps：Use Tx the and/or Rx reference number of initial ultrasound signal
Sample monitors the transmission time measurement circuit and/or temperature measuring circuit of ultrasonic flowmeter.Both electronic circuits are provided which
For calculating the information of flow rate q, as previously explained.By comparing such as according to temperature, flowmeter geometry and sound
Known relation between speed and temperature can complete the monitoring measured complete temperature, wherein pass come the transmission time calculated
The defeated time is for example to be calculated according to the correlation between Rx initial ultrasound signal and Rx current ultrasonic signal.Therefore, this is false
If the relationship of speed of sound and temperature is known.Temperature measuring circuit itself can be by joining the calibration of temperature measuring circuit
Measured value is examined to be compared to check with current alignment measured value.Therefore, joined by using the Tx and/or Rx of initial ultrasound signal
Examine numeral sample monitor the time correlation of one or two electronic circuit variation, and by the characteristic of initial ultrasound signal with work as
The characteristic of preceding ultrasonic signal is compared, and can permit the failure for easily detecting each in electronic circuit.
Preferably, this approach includes the following steps：Using Tx and/or Rx reference number sample as initial system parameters packet
Include in reference fingerprint, and/or export initial system parameters from Tx and/or Rx reference number sample, so as to will institute derived from
Initial system parameters are included in reference fingerprint.When including in reference fingerprint by Tx and/or Rx reference number sample, later
It can be determined which characteristic of Tx and/or Rx initial ultrasound signal will be compared with the feature of current ultrasonic signal respectively, from
And allow the great flexibility for monitoring ultrasonic flowmeter.When exporting initial system from Tx and/or Rx reference number sample
When parameter is to include in reference fingerprint by initial system parameters derived from institute, it is possible to reduce data volume to be stored, because
This allows to reduce the complexity and cost of the fingerprint storage equipment of ultrasonic flowmeter.In some embodiments, Tx and/or Rx is joined
It examines numeral sample to be included in reference fingerprint as initial system parameters, and initial system parameters is referred to from Tx and/or Rx
It exports in numeral sample, and is also included in reference fingerprint as initial system parameters.This allows very big flexibility,
And restore the derived common system parameter from Tx and/or Rx reference number sample, also so as to by reference fingerprint and currently
Calculation amount needed for being reduced when ultrasonic signal is compared.However, in some embodiments, including some in reference fingerprint
Initial system parameters are not derived from Tx and/or Rx reference number sample.These initial system parameters can be for example by hand
It adds, or is exported from other sources other than reference number sample dynamicly.
Preferably, reference fingerprint will measure clock correction data, temperature measuring circuit calibration data, time measuring circuit
One or more of calibration data, measurement statistics, initial ultrasound signal amplitude or initial zero passage dot pattern include as initial
System parameter.This information can provide the details of the time correlation variation about ultrasonic flowmeter.Preferably, initially
System parameter is derived from reference number sample, most preferably ultrasonic system parameter.Preferably, other parameters are from electricity
It is derived in the other parts on road.
Preferably, this approach includes the following steps：Initial zero crossing mould is exported from Tx and/or Rx reference number sample
Formula；And during the use of flowmeter, the current zero passage dot pattern of initial zero passage dot pattern and current ultrasonic signal is carried out
Compare.As explained before, initial zero passage dot pattern itself can with numeric form from Tx and/or Rx reference number sample
It is stored in reference fingerprint after export as initial system parameters or Tx and/or Rx reference number sample can store
In reference fingerprint, and the initial zero passage dot pattern of initial ultrasound signal can later when initial zero crossing mode should with work as
It is exported from Tx the and/or Rx reference number sample stored when the current zero passage dot pattern of preceding ultrasonic signal is compared.Cause
This, can detecte the time correlation variation of zero passage dot pattern, and can correspondingly start the dimension of ultrasonic flowmeter according to request
Shield.As another initial system parameters, it can be exported, store and compare by Tx the and/or Rx signal slope of zero crossing,
And it is as explained above, it is subject to necessary change.
Preferably, this approach includes the following steps：Initial signal width is exported from Tx and/or Rx reference number sample
Degree；And during the use of flowmeter, initial signal amplitude is compared with the current signal magnitude of current ultrasonic signal.
As explained before, initial ultrasound signal amplitude itself can be led from Tx and/or Rx reference number sample with numeric form
It is stored in reference fingerprint after out as initial system parameters or Tx and/or Rx reference number sample can store and join
It examines in fingerprint, and Tx and/or Rx initial ultrasound amplitude can be later when initial ultrasonic signal amplitude should be with current ultrasonic
It is exported from Tx the and/or Rx reference number sample stored when signal amplitude is compared.Therefore, it can detecte ultrasonic signal
The time correlation of amplitude changes, and can correspondingly start the maintenance of ultrasonic flowmeter.
Preferred method according to the present invention includes the following steps：Initial packet is exported from Tx and/or Rx reference number sample
Network function；And during the use of flowmeter, the current envelope function of initial envelope function and current ultrasonic signal is carried out
Compare.In some embodiments, the initial envelope function of Tx and/or Rx itself can be referred to numeric form from Tx and/or Rx
It is stored in reference fingerprint or Tx and/or Rx reference digital signal after export as initial system parameters in numeral sample
It can store in reference fingerprint, and the initial envelope function of Tx and/or Rx initial ultrasound signal can be later when initial
From Tx the and/or Rx reference number stored when envelope function should be compared with the current envelope function of current ultrasonic signal
It is exported in sample.Therefore, it can detecte the time correlation variation of ultrasonic signal envelope function, and can correspondingly start ultrasound
The maintenance of flowmeter.
Preferably, this approach includes the following steps：Original frequency is exported from Tx and/or Rx reference number sample to contain
Amount；And during the use of flowmeter, original frequency content is compared with the current frequency content of current ultrasonic signal.
Preferably, frequency content includes the frequency of the received signal of numeric form.Here, frequency content can for example refer to signal
FFT or DTFT, it may be possible to this data reduction version.Original frequency content itself can be from Tx and/or Rx reference number
It is stored in reference fingerprint after export as initial system parameters in sample or Tx and/or Rx reference number sample can be with
It is stored in reference fingerprint, and original frequency content can be later when initial frequency content should be with current ultrasonic signal
It is exported from Tx the and/or Rx reference number sample stored when current frequency content is compared.Therefore, it can detecte frequency
The time correlation of content changes, and can correspondingly start the maintenance of ultrasonic flowmeter.
Preferred method according to the present invention includes the following steps：Pass through comparison, difference calculating and ratio based on correlation
It one or more of calculates and to compare the initial system parameters and the system parameter currently measured.This allows to be easy to carry out
Compare.All initial system parameters being stored in fingerprint can be compared with corresponding current system parameter in the same way
Compared with.However, in some embodiments, different comparative approach is for different system parameters to be compared to each other.Preferably by surpassing
The microprocessor of sonic flowmeter compares to execute.Preferably, microprocessor, which also has, calculates the fluid flow for passing through flowmeter
Function.This allows the complexity by reducing ultrasonic flowmeter using only single microprocessor, and therefore allows easily
Implement this method.However, in some embodiments, fluid flow is by the analog-to-digital conversion of the ultrasonic flowmeter separated with microprocessor
Device calculates.When analog-digital converter is the high-speed AD converter for over-sampling ultrasonic signal, this is preferred.
Preferably, this approach includes the following steps：Reference fingerprint is stored in local flowmeter memory, and/or
Via network connection storage in remote data storage.Ultrasonic flowmeter preferably has local flowmeter memory, such as
For example, flash memory, EEPROM or any kind of nonvolatile memory.However, in some embodiments, hypersonic flow
Meter additionally or alternately includes network connection, so that reference fingerprint remote data is stored in remote data storage
In device, it is therefore preferable to cloud or server.In some embodiments, this approach includes the following steps：Reference fingerprint is stored in
In local flowmeter memory, and the backup of reference fingerprint is stored in remote data storage via network connection.
This, which can permit, provides simple remote storage or backup solution for reference fingerprint.It in some embodiments, can be with
Data are retrieved from local flowmeter memory via connected device (for example, PC or mobile phone).Equally, PC or movement are set
It is standby can be via PC's or reference fingerprint is retrieved in mobile device network connection from remote storage device so that the reference fingerprint
It can be compared with the current finger print retrieved from the device by PC/ mobile device.
Preferably, during the production of ultrasonic flowmeter and/or calibration, reference fingerprint is generated.This can permit storage
Reference fingerprint, and ultrasonic flowmeter is monitored in the production phase of ultrasonic flowmeter and/or calibration phase.Therefore, it is based on
The reference fingerprint that early stage generates, makes it possible simple long term monitoring.
In addition, problem of the invention is solved by being adapted to execute ultrasonic flowmeter according to the method for the present invention.
Allow easily to monitor system parameter based on reference fingerprint with this ultrasonic flowmeter, which includes respectively from Tx
And/or the initial system parameters that the Tx and/or Rx reference number sample of Rx initial ultrasound signal generates.
Preferred ultrasonic flowmeter according to the present invention includes analog-digital converter, which is adapted to excellent
It selects identical sample frequency and/or is repeatedly generate the initial ultrasound signal with the independent sample frequency of each numeral sample
Arrange Tx and/or Rx numeral sample, wherein each numeral sample is directed to, when there is the independent beginning relative to signal transmission beginning
Between.Therefore, Tx and/or Rx initial ultrasound signal can be by multiple sampling, and is therefore even optionally oversampled.Generate two or more
It the numeral sample of multiple series and is combined to generate finger print data and can permit analog-digital converter using lack sampling, though
So in this way, the even over-sampling reference number for still allowing to establish Tx and/or Rx initial ultrasound signal reproduces.However, high speed analog-digital conversion
Converter can also be provided by ultrasonic flowmeter.This, which can permit, directly carries out the sampling of over-sampling without multiple sampling.
Detailed description of the invention
The preferred embodiment of the present invention will be disclosed by referring to accompanying drawing below, and the present invention will be described in more detail, in attached drawing
In：
Fig. 1 shows ultrasonic flowmeter according to the present invention；And
Fig. 2 shows the flow charts for describing embodiment according to the method for the present invention.
Specific embodiment
In ultrasonic flowmeter using fingerprint recognition in industrial flow meter be it is known, industrial flow meter generally includes more
A voice path.The fingerprint of the instrument of these types is usually to apply relevant parameter, and unite including various types of measurements
Meter, such as：
1) flow profile (derived from multipath measurement)
2) flow profile is symmetrical (derived from multipath measurement)
3) speed of sound changes
4) turbulent model in each path
5) signal-to-noise ratio changes
6) signal amplitude changes
It the use of the variation and transmitting (Tx) of various measuring circuit parameters and the variation of reception (Rx) characteristics of signals is not
Know.In addition, it can include various measurement statistics, for example, the standard deviation of signal amplitude, signal-to-noise ratio and various measured values.
Fig. 1 shows the exemplary embodiment of ultrasonic flowmeter according to the present invention.Ultrasonic flowmeter 1 includes Spool piece 2,
Flowing lining 3 is accommodated in the Spool piece.Flowing lining 3 is arranged between the inflow entrance 4 of Spool piece 2 and outflux 5.It is super
Sonic flowmeter 1 further includes the fixed device of reflector of sound baffle 6,7.Sound baffle 6,7 is as ultrasonic transducer
Voice path (dotted line) is established between first transducer 8 and second transducer 9.Ultrasonic signal can be in the first ultrasonic transducer 8
It is sent between the second ultrasonic transducer 9.Transmitted received (Rx) ultrasonic signal of (Tx) and institute can be by being contained in
The analog-digital converter (not shown) accommodated in the shell 10 of electronics PCB 11 is sampled.Analog-digital converter is adapted to generate
Rx the and Tx reference number sample of Rx and Tx initial ultrasound signal, to generate the number of the reference fingerprint for ultrasonic flowmeter 1
According to initial ultrasound signal is sent and received by first transducer 8 and second transducer 9, and Rx initial ultrasound signal is by modulus
Converter carries out digital sample, and to obtain Rx reference number sample, and Tx initial ultrasound signal carries out number by simulation numeral
Sampling, to obtain Tx reference number sample.
As explained before, therefore ultrasonic flowmeter 1 is adapted to self-monitoring, because not needing using external equipment
It calibrates the various electronic circuits of ultrasonic flowmeter 1, or can also be monitored according to the request from connected device.Though
The time correlation variation of the system parameter of right ultrasonic flowmeter 1 may influence the fluid flow that outflux 5 is flowed to from inflow entrance 4
The accuracy of flow measurement, but ultrasonic flowmeter 1 is adapted to monitor the geometry of ultrasonic flowmeter, storage indirectly
The variation of the temperature measuring circuit of transmission time measurement circuit (not shown) and ultrasonic flowmeter 1 in shell 10, the temperature
The temperature sensor 12 of degree measuring circuit is shown in FIG. 1.Therefore, can by monitoring Rx and/or Tx current ultrasonic signal come
The variation of indirect monitoring K.As previously described, when can monitor C and pass through the indirect measurement of temperature, and monitoring can be passed through
Between measuring circuit calibration and clock alignment come monitor Δ t measurement quality.
Fig. 2 has now schematically illustrated preferred method according to the present invention.In first step (S21), send initial
Ultrasonic signal.More specifically, in this embodiment, Tx initial ultrasound signal is sent to by the first ultrasonic transducer 8 the second to be surpassed
Sonic transducer 9.Therefore, in second step (S22), second transducer 9 receives Rx initial ultrasound signal.In third step
(S23) in, the Rx reference number sample of the received Rx initial ultrasound signal to generate of ultrasonic flowmeter 1 is used.More specifically,
The analog-digital converter of ultrasonic flowmeter 1 generates Rx reference number sample according to Rx initial ultrasound signal.In the present embodiment, mould
Number converter generates two serial numeral samples of initial ultrasound signal, and the sample of each series has individual sample frequency
With the independent time started relative to the beginning for sending initial super wave acoustic signals.Therefore, detailed Rx reference number printed words are generated
This.However, in other embodiments of the invention, having used the high speed analog-digital conversion for allowing to carry out over-sampling to Rx initial ultrasound signal
Converter.In these embodiments, Rx reference number sample can be generated with the numeral sample of single series, these digital samples
This is in close proximity to each other in time, so that it allows digitally to reconstruct Rx initial ultrasound signal.In four steps (S24),
The data of the reference fingerprint of ultrasonic flowmeter 1 are generated from Rx reference number sample.In unshowned first sub-step, Rx ginseng
Numeral sample is examined to be included in reference fingerprint as initial system parameters.In unshowned second sub-step, from Rx reference number
Initial zero passage dot pattern is exported in printed words sheet, and includes joining using initial zero passage dot pattern as another initial system parameters
It examines in fingerprint.In unshowned third sub-step, initial signal amplitude is exported from Rx reference number sample, and will be initial
Signal amplitude is included in reference fingerprint as another initial system parameters.In unshowned 4th sub-step, it will measure
Clock correction data is included in reference fingerprint as another initial system parameters.In unshowned 5th sub-step, from
Initial envelope function is exported in Rx reference number sample, and is included in reference fingerprint as another initial system parameters
In.In unshowned 6th sub-step, frequency of the export comprising initial ultrasound signal is initial from Rx reference number sample
Frequency content, and be included in reference fingerprint as another initial system parameters.Export initial system parameters be by
The same microprocessor of flow rate is calculated to complete.Therefore, in the 5th step (S25) of the method for the present invention, above-mentioned initial system
System parameter is included in the reference fingerprint of ultrasonic flowmeter.In the 6th step of method as shown in Figure 2, when using super
When sonic flowmeter, reference fingerprint generated is compared (S26) with the identical Rx system parameter currently measured.Cause
This, more specifically, each of aforementioned initial system parameters with just believed by the received Rx current ultrasonic of the second ultrasonic transducer 9
Number corresponding current system parameter be compared.Including all initial system parameters in reference fingerprint by difference calculate with
Corresponding current system parameter is compared.When the difference between a pair of of initial system parameters and current system parameter crosses predetermined threshold
When value, ultrasonic flowmeter 1 sends alarm via network connection, to initiate maintenance according to request.
In ultrasonic flowmeter 1 and the present embodiment of institute's implementation method, ultrasonic flowmeter 1 includes the local stream in shell 10
Meter memory (not shown).Local flowmeter memory is that reference fingerprint is stored in local flash memory is (or any
Other kinds of nonvolatile memory).Reference fingerprint was permanently stored in the production phase of ultrasonic flowmeter 1.Hypersonic flow
The alternate embodiment (not shown) of meter 1 includes the net for being instead stored in reference fingerprint in remote data storage
Network connection, for example, wireless network connection.
As can be seen, the present invention provides a kind of method for monitoring ultrasonic flowmeter 1, this method includes following
Step：Reference fingerprint is generated, which includes one or more initial system parameters of ultrasonic flowmeter 1；And it ought make
When with ultrasonic flowmeter 1, reference fingerprint generated is compared with the same system parameter currently measured.By dividing
Not Sheng Cheng Tx and/or Rx initial ultrasound signal Tx and/or Rx reference number sample, to generate the data of reference fingerprint, prison
Surveying ultrasonic flowmeter becomes very simple, because initial ultrasound signal is sent and received by ultrasonic flowmeter itself, and
Transmitted received (Rx) the initial ultrasound signal of (Tx) and/or institute carries out digital sample by ultrasonic flowmeter itself, to divide
It Huo get not Tx and/or Rx reference number sample.It therefore, there is no need to the external equipment for monitoring.For example, in addition to or replace from Rx
Initial ultrasound signal generates Rx reference number sample, can generate Tx reference number sample from Tx initial ultrasound signal.In addition, ginseng
Examining numeral sample can be from the initial ultrasound signal for running to second ultrasonic transducer or vice versa from the first ultrasonic transducer
It generates.
It should be appreciated by those skilled in the art that the present invention is not limited to described exemplary embodiments.For example, in addition to or
Instead of generating Rx reference number sample from Rx initial ultrasound signal, Tx reference number printed words can be generated from Tx initial ultrasound signal
This.In addition, reference number sample can run to the first of second ultrasonic transducer or vice versa from from the first ultrasonic transducer
Beginning ultrasonic signal generates.
In addition, initially generating at least four sample in unshowned embodiment：It the Tx sample of two energy converters and comes from
The Rx sample of two energy converters.
Usually this at least four sample is sampled under the conditions of zero delivery, but can also be with high flow rate speed to additional
Serial sample sampled for later referring to.Each of sampled signal of this at least four series can be by this 2 kinds of differences
One of lack sampling/deinterleaving method or a variety of generations, or generated by the direct over-sampling of high-speed AD converter.
Claims (15)
1. method of the one kind for monitoring ultrasonic flowmeter (1), this approach includes the following steps：
Reference fingerprint is generated, which includes one or more initial system parameters of the ultrasonic flowmeter (1)；And
When using ultrasonic flowmeter (1), the same system parameter that by reference fingerprint generated and is currently measuring into
Row compares,
It is characterized in that, this approach includes the following steps：
Generate initial ultrasound signal reference number sample, to generate the data of the reference fingerprint, the initial ultrasound signal by
The ultrasonic flowmeter (1) sends and receives, and transmitted received (Rx) the initial ultrasound signal of (Tx) and/or institute is surpassed by this
Sonic flowmeter (1) carries out digital sample, to obtain Tx and/or Rx reference number sample respectively.
2. the method according to claim 1, wherein the ultrasonic flowmeter (1) include the first ultrasonic transducer and
Second ultrasonic transducer, the initial ultrasound signal are sent between first ultrasonic transducer and second ultrasonic transducer,
And Tx the and/or Rx initial ultrasound signal is sampled by the analog-digital converter of the ultrasonic flowmeter (1), to obtain respectively
Tx the and/or Rx reference number sample.
3. method according to claim 1 or 2, which is characterized in that this approach includes the following steps：
The change of ultrasonic flowmeter (1) geometry is monitored using the Tx of the ultrasonic signal and/or the Rx reference number sample
Change.
4. according to the method in any one of claims 1 to 3, which is characterized in that this approach includes the following steps：
When monitoring the transmission of the ultrasonic flowmeter (1) using Tx the and/or Rx reference number sample of the initial ultrasound signal
Between measuring circuit and/or temperature measuring circuit.
5. method according to claim 1 to 4, which is characterized in that this approach includes the following steps：
Using the Tx and/or the Rx reference number sample as initial system parameters include in the reference fingerprint, and/or from this
Initial system parameters are exported in Tx and/or the Rx reference number sample, to include at this by initial system parameters derived from institute
In reference fingerprint.
6. the method according to any one of claims 1 to 5, which is characterized in that the reference fingerprint will measure clock alignment
Data, temperature measuring circuit calibration data, time measuring circuit calibration data, measurement statistics, initial ultrasound signal amplitude, initially
One or more of zero passage dot pattern, initial envelope function or original frequency content include being used as initial system parameters.
7. method according to any one of claim 1 to 6, which is characterized in that this approach includes the following steps：
Initial zero passage dot pattern is exported from Tx the and/or Rx reference number sample；And
During the use of the flowmeter (1), by the current zero passage dot pattern of the initial zero passage dot pattern and current ultrasonic signal
It is compared.
8. method according to any one of claim 1 to 7, which is characterized in that this approach includes the following steps：
Initial signal amplitude is exported from the Tx and/or the Rx reference number sample；And
During the use of the flowmeter (1), the current signal magnitude of the initial signal amplitude and current ultrasonic signal is carried out
Compare.
9. method according to any one of claim 1 to 8, which is characterized in that this approach includes the following steps：
Initial envelope function is exported from Tx the and/or Rx reference number sample；And
During the use of the flowmeter (1), the current envelope function of the initial envelope function and current ultrasonic signal is carried out
Compare.
10. method according to any one of claim 1 to 9, which is characterized in that this approach includes the following steps：
Original frequency content is exported from the Tx and/or the Rx reference number sample；And
During the use of the flowmeter (1), the original frequency content and the current frequency content of current ultrasonic signal are carried out
Compare.
11. method according to any one of claim 1 to 10, which is characterized in that this approach includes the following steps：
By being calculated based on the comparison of correlation, difference and one or more of ratio calculation is come by the initial system parameters
It is compared with the system parameter that this is currently measured.
12. method according to any one of claim 1 to 11, which is characterized in that this approach includes the following steps：
The reference fingerprint is stored in local flowmeter memory, and/or via network connection storage in remote data storage
In device.
13. method according to any one of claim 1 to 12, which is characterized in that in the production of the ultrasonic flowmeter (1)
And/or during calibration, generate the reference fingerprint.
14. a kind of ultrasonic flowmeter (1), is adapted to execute method according to any one of claim 1 to 13.
15. ultrasonic flowmeter (1) according to claim 14, which is characterized in that the ultrasonic flowmeter (1) includes that modulus turns
Parallel operation, the analog-digital converter are adapted to preferred identical sample frequency and/or with the independent sampling of each numeral sample
Frequency repeatedly generates a series of numeral samples of the initial ultrasound signal, wherein be directed to each numeral sample, have relative to
The signal sends the independent time started started.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2016/057168 WO2017167389A1 (en) | 2016-03-31 | 2016-03-31 | Method for monitoring an ultrasonic flow meter |
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| Publication Number | Publication Date |
|---|---|
| CN108885129A true CN108885129A (en) | 2018-11-23 |
| CN108885129B CN108885129B (en) | 2021-02-05 |
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| CN201680083458.5A Active CN108885129B (en) | 2016-03-31 | 2016-03-31 | Method for monitoring an ultrasonic flow meter |
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| Country | Link |
|---|---|
| EP (1) | EP3436787A1 (en) |
| CN (1) | CN108885129B (en) |
| WO (1) | WO2017167389A1 (en) |
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| WO2023006399A1 (en) * | 2021-07-27 | 2023-02-02 | Belimo Holding Ag | Method and system for predictive maintenance of an ultrasonic sensor for hvac systems |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108885129B (en) | 2021-02-05 |
| EP3436787A1 (en) | 2019-02-06 |
| WO2017167389A1 (en) | 2017-10-05 |
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