CN114812716A - Method for detecting clogging in a coriolis flow meter - Google Patents
Method for detecting clogging in a coriolis flow meter Download PDFInfo
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- CN114812716A CN114812716A CN202210531347.3A CN202210531347A CN114812716A CN 114812716 A CN114812716 A CN 114812716A CN 202210531347 A CN202210531347 A CN 202210531347A CN 114812716 A CN114812716 A CN 114812716A
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- Prior art keywords
- mass flow
- coriolis
- coriolis flow
- blockage
- measurement device
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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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
Abstract
The invention discloses a method for detecting blockage in a Coriolis flow measuring device, which changes the mass flow in a pipeline by controlling the opening of an electric control valve, and compares the actual mass flow measured by the Coriolis flow measuring device with the expected mass flow when the blockage does not occur so as to determine whether the Coriolis flow measuring device is blocked or not. The method of the present invention does not require any equipment to be installed on the coriolis flow measurement device and therefore does not adversely affect the measurement results of the coriolis flow measurement device, while providing a practical method of jam detection.
Description
Technical Field
The invention relates to the technical field of metering equipment, in particular to a method for detecting blockage in a Coriolis flow measuring device.
Background
Coriolis flow measuring device, also known as coriolis flowmeter, is a high-end mass flow measuring device whose principle is that vibration is applied to the inlet end of a measuring tube and detected at the outlet end, and the mass flow in the measuring tube can be determined by detecting the phase time difference between the vibrations at the inlet end and the outlet end.
In most coriolis-type force flow meters, the measurement tube is a slightly curved tube with a small curvature, which is susceptible to vibrations and thus has a positive effect on the measurement results. As with other pipes, there is a possibility of clogging after a long period of time of conveying the medium, and particularly, when a medium having a high viscosity is conveyed, the possibility of clogging is significantly increased, and therefore it is necessary to detect whether or not clogging has occurred in the measuring pipe and to perform processing. Since the measuring tube needs to vibrate when measuring the mass flow, it is not possible to mount thereon a device for detecting clogging, such as various sensors. Therefore, no effective occlusion detection method exists.
Disclosure of Invention
The embodiment of the invention provides a method for detecting blockage in a Coriolis flow measuring device, which is used for solving the problem that an effective blockage detection method does not exist in the prior art.
On one hand, the embodiment of the invention provides a method for detecting blockage in a Coriolis flow measuring device, wherein the inlet end of the Coriolis flow measuring device is connected with the outlet end of an electric control valve through a pipeline, and the Coriolis flow measuring device and the electric control valve are electrically connected with an upper computer; the method comprises the following steps:
the upper computer controls the opening of the electric control valve and determines the mass flow passing through the pipeline according to the corresponding relation between the set mass flow and the opening;
the upper computer acquires mass flow passing through the Coriolis flow measuring device;
and the upper computer compares the determined mass flow with the acquired mass flow, and determines whether the Coriolis flow measuring device is blocked or not according to a comparison result.
In one possible implementation, the corresponding relationship between the mass flow and the opening of the coriolis flow rate measurement device is set to correspond to the mass flow of the coriolis flow rate measurement device when no clogging occurs and the opening of the electrically controlled valve.
In a possible implementation mode, the upper computer generates a group of control codes, then the opening of the electric control valve is controlled to change for multiple times according to the control codes, then the mass flow passing through the pipeline is determined according to the corresponding relation between the set mass flow and the opening, and the determined mass flow comprises a plurality of mass flow values; the mass flow of the Coriolis flow measuring device obtained by the upper computer also comprises a plurality of mass flow values, and the upper computer compares the mass flow values in the determined mass flow with the mass flow values in the obtained mass flow one by one in sequence.
In one possible implementation, the control code is randomly generated by the upper computer.
In one possible implementation, the control code is a digital code consisting of a plurality of digits, wherein each digit represents the opening degree of the electrically controlled valve.
In one possible implementation, when the difference between the determined mass flow rate and the acquired mass flow rate is less than or equal to a set threshold, the upper computer determines that the coriolis flow measurement device is not jammed; and when the difference value between the determined mass flow and the acquired mass flow is larger than a set threshold value, the upper computer determines that the Coriolis flow measuring device is blocked.
In one possible embodiment, the host computer has a display unit for displaying information on whether a blockage has occurred in the coriolis flow meter.
In one possible implementation mode, the upper computer is electrically connected with the alarm unit, and when the upper computer determines that the Coriolis flow measuring device is blocked, the alarm unit is controlled to send alarm information.
The method for detecting clogging in a coriolis flow measuring device of the present invention has the following advantages:
the actual mass flow measured by the coriolis flow measuring device is compared to the expected mass flow when no plugging occurs to determine whether a plugging occurs in the coriolis flow measuring device. The method of the present invention does not require any equipment to be installed on the coriolis flow measurement device and therefore does not adversely affect the measurement results of the coriolis flow measurement device, while providing a practical method of jam detection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a delivery system having a Coriolis flow measurement device in accordance with an embodiment of the present invention;
fig. 2 is a flow chart of a method for detecting a blockage in a coriolis flow measurement device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a conveying system of a coriolis flow measuring device according to an embodiment of the present invention, and fig. 2 is a flowchart of a method for detecting a blockage in the coriolis flow measuring device according to an embodiment of the present invention. The invention provides a method for detecting blockage in a Coriolis flow measuring device, wherein an inlet end of the Coriolis flow measuring device 100 is connected with an outlet end of an electric control valve 200 through a pipeline, and both the Coriolis flow measuring device 100 and the electric control valve 200 are electrically connected with an upper computer; the method comprises the following steps:
s200, controlling the opening of the electric control valve 200 by the upper computer, and determining the mass flow passing through the pipeline according to the corresponding relation between the set mass flow and the opening;
s210, the upper computer acquires mass flow passing through the Coriolis flow measuring device 100;
and S220, the upper computer compares the determined mass flow with the acquired mass flow, and determines whether the Coriolis flow measuring device 100 is blocked or not according to the comparison result.
Illustratively, both ends of the conduit are flanged to the inlet end of coriolis flow measurement device 100 and the outlet end of electronically controlled valve 200. When the electronically controlled valve 200 is controlled by the host computer to adjust the opening, and the mass flow in the conduit changes, the coriolis flow measuring device 100 can detect the change in the mass flow. If there is no internal blockage in the coriolis flow measurement device 100, the actual mass flow rate detected by the coriolis flow measurement device 100 should be comparable to the theoretical expected mass flow rate, or there should be only a small difference, and the upper computer only needs to compare the actual mass flow rate detected by the coriolis flow measurement device 100 with the theoretical expected mass flow rate to draw a conclusion as to whether there is a blockage in the coriolis flow measurement device 100.
In the embodiment of the present invention, the corresponding relationship between the mass flow rate and the opening degree is set as the corresponding relationship between the mass flow rate of the coriolis flow rate measurement device 100 when no clogging occurs and the opening degree of the electrically controlled valve 200. The set correspondence between the mass flow rate and the opening degree can be obtained through experiments in a laboratory, and can also be obtained through long-term monitoring of the conveying system. Since the delivery system is required to deliver pressure, either too high or too low, for a particular media, the mass flow rate will not change significantly when the media being delivered is unchanged, and the same value can be used for the desired mass flow rate without frequent correction as long as the coriolis flow measurement device 100 is not jammed.
In a possible embodiment, the upper computer generates a group of control codes, then controls the opening of the electronic control valve 200 to change for a plurality of times according to the control codes, and then determines the mass flow passing through the pipeline according to the corresponding relation between the set mass flow and the opening, wherein the determined mass flow comprises a plurality of mass flow values; the mass flow of the coriolis flow measurement device 100 acquired by the upper computer also includes a plurality of mass flow values, and the upper computer sequentially compares the plurality of mass flow values in the determined mass flow with the plurality of mass flow values in the acquired mass flow one by one.
Illustratively, the control code is used to indicate the opening degree required for each time the electronically controlled valve 200 is controlled. The control code may be a digital code consisting of a multi-bit number, such as 18324756, or 11000101. The former digital code is used for controlling the electrically controlled valve 200 with multiple opening degrees, for example, the electrically controlled valve 200 has 10 opening degrees, which are full-off, on 1/9, on 2/9, on 3/9, on 4/9, on 5/9, on 6/9, on 7/9, on 8/9 and full-on from small to large, and the corresponding digital code is 0 to 9. The latter digital code is used to control the electrically controlled valve 200 with only 2 openings, for example, the electrically controlled valve 200 has only 2 openings of full open and full close, and the corresponding digital codes are 1 and 0.
In an embodiment of the present invention, the upper computer may determine a corresponding mass flow rate according to the control code, and then compare the mass flow rate with the mass flow rate measured by the coriolis flow rate measurement device 100, and if the mass flow rate values are the same or the difference is less than or equal to a set threshold after sequential comparison, it may be determined that the coriolis flow rate measurement device 100 is not jammed. If there is a difference in the mass flow values compared in sequence and the difference is greater than a set threshold, it may be determined that a blockage has occurred in coriolis flow measurement device 100.
In another embodiment, after the upper computer controls the electrically controlled valve 200 according to the control code, the mass flow measured by the coriolis flow measuring device 100 may be acquired, the acquired mass flow may be converted into a feedback code, the feedback code and the control code may be compared bit by bit, and the blockage determination may be performed according to the comparison result.
In one possible embodiment, the control code is randomly generated by the upper computer.
Illustratively, the bits that the control code needs to contain include: the start bit, data bit and end bit, the length of the entire control code, the data of each bit and the combination of all data bits can be randomly generated. When the upper computer acquires the mass flow measured by the coriolis flow rate measurement device 100 and converts the mass flow into the feedback code, the recording of the feedback code is started when the start bit is detected, and the recording of the feedback code is ended when the end bit is detected.
In another embodiment, the control code may be manually entered by a technician, it being understood that the technician is only required to manually enter the data bits since both the start and end bits have fixed encoding rules.
In one possible embodiment, the host computer has a display unit for displaying information on whether the coriolis flow measuring device 100 is jammed.
For example, the display unit may be an lcd (liquid Crystal display) or led (light Emitting diode) display, and when a technician is required to perform manual operation, the input device may be connected to the upper computer. The input device may be a mechanical keyboard or a touch input device integrated on the display unit.
In one possible embodiment, the upper computer is electrically connected to an alarm unit, and when the upper computer determines that the coriolis flow measuring device 100 is clogged, the alarm unit is controlled to send an alarm message.
Illustratively, the alarm unit may be an audible alarm, or the display unit may be used as the alarm unit, and the display unit may display the alarm information in the form of characters or animation.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. Method for detecting a blockage in a coriolis flow measuring device, characterized in that the inlet end of the coriolis flow measuring device (100) is connected to the outlet end of an electrically controlled valve (200) by means of a pipeline, the coriolis flow measuring device (100) and the electrically controlled valve (200) both being electrically connected to an upper level; the method comprises the following steps:
the upper computer controls the opening of the electric control valve (200), and determines the mass flow passing through the pipeline according to the corresponding relation between the set mass flow and the opening;
the upper computer acquires mass flow passing through the Coriolis flow measuring device (100);
and the upper computer compares the determined mass flow with the obtained mass flow, and determines whether the Coriolis flow measuring device (100) is blocked or not according to a comparison result.
2. The method of detecting a blockage in a coriolis flow measurement device of claim 1 wherein the set mass flow rate to opening correspondence is a correspondence between a mass flow rate of the coriolis flow measurement device (100) when a blockage is not occurring and an opening of the electronically controlled valve (200).
3. The method of detecting a blockage in a coriolis flow meter of claim 1 wherein said host computer generates a set of control codes, controls the opening of said electronically controlled valve (200) to change a plurality of times based on said control codes, and determines the mass flow through said conduit based on said set correspondence of mass flow and opening, said determined mass flow comprising a plurality of mass flow values;
the mass flow of the Coriolis flow measuring device (100) obtained by the upper computer also comprises a plurality of mass flow values, and the upper computer compares the mass flow values in the determined mass flow with the mass flow values in the obtained mass flow one by one in sequence.
4. The method of detecting a blockage in a coriolis flow measurement device of claim 3 characterized in that said control code is randomly generated by said host computer.
5. The method of detecting a blockage in a coriolis flow measurement device of claim 3 characterized in that said control code is a digital code comprised of a plurality of digits, each digit representing an opening of said electronically controlled valve (200).
6. The method of detecting a blockage in a coriolis flow measurement device of claim 1 characterized in that said host computer determines that said coriolis flow measurement device (100) is not blocked when a difference between said determined mass flow and said acquired mass flow is less than or equal to a set threshold value;
and when the difference value between the determined mass flow and the obtained mass flow is larger than the set threshold value, the upper computer determines that the Coriolis flow measuring device (100) is blocked.
7. The method of detecting a blockage in a coriolis flow measurement device of claim 1 characterized in that the host computer has a display unit for displaying information on whether a blockage has occurred in the coriolis flow measurement device (100).
8. The method of detecting a blockage in a coriolis flow measurement device of claim 1, characterized in that the host computer is electrically connected to an alarm unit that is controlled to send an alarm message when the host computer determines that a blockage has occurred in the coriolis flow measurement device (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210531347.3A CN114812716A (en) | 2022-05-16 | 2022-05-16 | Method for detecting clogging in a coriolis flow meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210531347.3A CN114812716A (en) | 2022-05-16 | 2022-05-16 | Method for detecting clogging in a coriolis flow meter |
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| Publication Number | Publication Date |
|---|---|
| CN114812716A true CN114812716A (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210531347.3A Pending CN114812716A (en) | 2022-05-16 | 2022-05-16 | Method for detecting clogging in a coriolis flow meter |
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| CN (1) | CN114812716A (en) |
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- 2022-05-16 CN CN202210531347.3A patent/CN114812716A/en active Pending
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