Method and apparatus for monitoring the condition of a coriolis mass flowmeter

Abstract

The application discloses a kind of measurement state monitoring method and device of Coriolis mass flowmeter, when Coriolis mass flowmeter normal work, deformation detection unit is used to detect the deformation generated under the influence of mass flow, and the corresponding mass flow is determined according to the deformation obtained by detection, finally and the mass flow obtained by Coriolis mass flowmeter measurement are compared, i.e. The application does not need to interrupt the normal work of Coriolis mass flowmeter, so it has little influence on enterprise production.

Description

Technical Field

[0001] This invention relates to the field of metering equipment technology, and in particular to a method and device for monitoring the measurement status of a Coriolis mass flow meter. Background Technology

[0002] A Coriolis mass flow meter (CMF) is a metering device that measures the mass flow rate of fluid media, such as oil and natural gas, in a pipeline. It has a vibration excitation device at the inlet end of the measuring tube and a vibration monitoring device at the outlet end. By calculating the time difference between the vibration phases at the inlet and outlet ends, the mass flow rate of the medium flowing through the measuring tube can be determined.

[0003] Since Coriolis mass flow meters are a type of metering equipment, their measurement status also needs to be monitored. Currently, the monitoring of metering equipment is usually conducted periodically, requiring the equipment to be removed from the pipeline and calibrated in a laboratory to determine whether its condition is up to standard. However, the intervals between these periodic inspections are quite long, with a minimum of once every six months. This method not only has the problem of a long cycle, but also requires a significant interruption of production operations during the inspection, which has a considerable impact on enterprises.

[0004] To address this issue, existing technologies have proposed various on-site monitoring methods. These methods do not require the removal of the Coriolis mass flow meter, and the time spent on production interruption is relatively short, thus significantly reducing the impact. However, existing on-site monitoring methods still require short-term production interruptions and cannot achieve real-time status monitoring during the production process. Summary of the Invention

[0005] This invention provides a method and apparatus for monitoring the measurement status of a Coriolis mass flow meter, which solves the problem that monitoring methods in the prior art require interruption of production operations.

[0006] On one hand, embodiments of the present invention provide a method for monitoring the measurement status of a Coriolis mass flow meter. The Coriolis mass flow meter has a deformation detection unit installed on its measuring tube, and the deformation detection unit is electrically connected to a field monitoring terminal. The method includes:

[0007] The on-site monitoring terminal acquires deformation data from the deformation detection unit;

[0008] The on-site monitoring terminal determines the mass flow rate of the medium passing through the Coriolis mass flow meter based on deformation data;

[0009] The on-site monitoring terminal acquires the mass flow rate measured by the Coriolis mass flow meter, compares the determined mass flow rate with the measured mass flow rate, and determines the measurement status of the Coriolis mass flow meter based on the comparison result.

[0010] In a possible implementation, the on-site monitoring terminal determines the mass flow of the medium passing through the Coriolis mass flowmeter according to the deformation data, comprising: the on-site monitoring terminal determines the mass flow corresponding to the deformation data according to the pre-set corresponding relationship between the deformation and the mass flow.

[0011] In a possible implementation, the pre-set corresponding relationship between the deformation and the mass flow is obtained by the deformation data and the mass flow measured when the Coriolis mass flowmeter is in a normal measurement state.

[0012] In a possible implementation, when the on-site monitoring terminal compares the determined mass flow with the measured mass flow, if the difference between the determined mass flow and the measured mass flow is less than or equal to a set threshold, the on-site monitoring terminal determines that the Coriolis mass flowmeter is in a normal measurement state; if the difference between the determined mass flow and the measured mass flow is greater than the set threshold, the on-site monitoring terminal determines that the Coriolis mass flowmeter is in an abnormal measurement state.

[0013] On the other hand, the embodiment of the present application also provides a measurement state monitoring device of a Coriolis mass flowmeter, comprising: a deformation detection unit and an on-site monitoring terminal;

[0014] The deformation detection unit is arranged on a measuring pipe of the Coriolis mass flowmeter, and the deformation detection unit is electrically connected with the on-site monitoring terminal.

[0015] The on-site monitoring terminal is used to acquire the deformation data of the deformation detection unit, and determine the mass flow of the medium passing through the Coriolis mass flowmeter according to the deformation data.

[0016] The on-site monitoring terminal is also used to acquire the mass flow measured by the Coriolis mass flowmeter, compare the determined mass flow with the measured mass flow, and determine the measurement state of the Coriolis mass flowmeter according to the comparison result.

[0017] In a possible implementation, a remote monitoring terminal is further included, the on-site monitoring terminal is in communication connection with the remote monitoring terminal through a network; and the on-site monitoring terminal sends the determined measurement state of the Coriolis mass flowmeter to the remote monitoring terminal.

[0018] In a possible implementation, a remote server is further included, the on-site monitoring terminal and the remote monitoring terminal are both in communication connection with the remote server through a network.

[0019] In a possible implementation, a signal acquisition unit is further included, the signal acquisition unit is electrically connected between the deformation detection unit and the on-site monitoring terminal; and the signal acquisition unit is used to perform signal conditioning processing on the deformation data acquired by the deformation detection unit.

[0020] In a possible implementation, the deformation detection unit is a strain gauge.

[0021] The measurement state monitoring method and device of the Coriolis mass flowmeter have the following advantages:

[0022] When the Coriolis mass flowmeter is working normally, the deformation detection unit is used to detect the deformation of the Coriolis mass flowmeter caused by the mass flow, and the corresponding mass flow is determined according to the detected deformation, and finally compared with the mass flow measured by the Coriolis mass flowmeter, so that the measurement state of the Coriolis mass flowmeter can be determined. The present application does not need to interrupt the normal work of the Coriolis mass flowmeter, so it has little effect on the production of enterprises. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0024] Figure 1 A flow chart of a measurement state monitoring method of a Coriolis mass flowmeter is provided for the embodiments of the present application.

[0025] Figure 2 A schematic diagram of a measurement state monitoring device of a Coriolis mass flowmeter is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] Figure 1 A flow chart of a measurement state monitoring method of a Coriolis mass flowmeter is provided for the embodiments of the present application. The measurement state monitoring method of a Coriolis mass flowmeter provided by the present application, a deformation detection unit 110 is arranged on the measuring tube of the Coriolis mass flowmeter 100, and the deformation detection unit 110 is electrically connected with the field monitoring terminal 200; the method comprises:

[0028] The field monitoring terminal 200 acquires the deformation data of the deformation detection unit 110;

[0029] The field monitoring terminal 200 determines the mass flow of the medium passing through the Coriolis mass flowmeter 100 according to the deformation data.

[0030] The field monitoring terminal 200 acquires the mass flow measured by the Coriolis mass flowmeter 100, compares the determined mass flow with the measured mass flow, and determines the measurement state of the Coriolis mass flowmeter 100 according to the comparison result.

[0031] Exemplarily, although the measurement tube of the Coriolis mass flowmeter 100 has high rigidity, it still has a certain elasticity. When the medium flows in the measurement tube, a slight deformation will occur at the inlet end and the outlet end of the measurement tube under the impact of the medium. The amount of deformation is directly proportional to the size of the mass flow, that is, the greater the mass flow, the greater the deformation of the measurement tube. Therefore, the mass flow of the medium passing through the Coriolis mass flowmeter 100 can be determined by measuring the deformation of the measurement tube, which is called the true mass flow. The mass flow of the medium measured by the Coriolis mass flowmeter 100 is called the measured mass flow. If the measured mass flow is the same as the true mass flow or only has a small difference, it can be determined that the measurement state of the Coriolis mass flowmeter 100 is normal. Otherwise, it can be determined that the measurement state of the Coriolis mass flowmeter 100 is abnormal.

[0032] In the embodiment of the present application, the field monitoring terminal 200 is arranged near the monitored Coriolis mass flowmeter 100. Specifically, the field monitoring terminal 200 can be arranged on the pipeline where the Coriolis mass flowmeter 100 is located, and a protection box is arranged outside the field monitoring terminal 200 to provide a good working environment for the field monitoring terminal 200.

[0033] In a possible embodiment, the field monitoring terminal 200 determines the mass flow of the medium passing through the Coriolis mass flowmeter 100 according to the deformation data, which includes that the field monitoring terminal 200 determines the mass flow corresponding to the deformation data according to a pre-set corresponding relationship between deformation and mass flow.

[0034] Exemplarily, the pre-set corresponding relationship between deformation and mass flow can be obtained in two ways. One is to test multiple mass flows in a laboratory when the monitored Coriolis mass flowmeter 100 or a completely identical mass flowmeter is in a normal measurement state, then measure the deformation of the measurement tube under each mass flow, and plot the coordinate points between the mass flow and the deformation in a coordinate system. A relationship curve between the mass flow and the deformation can be obtained by fitting multiple coordinate points. When the Coriolis mass flowmeter 100 is monitored, the deformation detection unit 110 acquires the deformation data of the measurement tube, and the field monitoring terminal 200 can determine the mass flow corresponding to the current deformation data according to the relationship curve between the mass flow and the deformation.

[0035] Another way to obtain the above-mentioned preset correspondence between the deformation and the mass flow is to detect the deformation of the Coriolis mass flowmeter 100 by using the deformation detection unit 110, and in a normal measurement state, the field monitoring terminal 100 draws and fits a relationship curve between the deformation detected by the deformation detection unit 110 and the mass flow measured by the Coriolis mass flowmeter 100.

[0036] In a possible embodiment, when the field monitoring terminal 200 compares the determined mass flow and the measured mass flow, if the difference between the determined mass flow and the measured mass flow is less than or equal to a set threshold value, the field monitoring terminal 200 determines that the Coriolis mass flowmeter 100 is in a normal measurement state; if the difference between the determined mass flow and the measured mass flow is greater than the set threshold value, the field monitoring terminal 200 determines that the Coriolis mass flowmeter 100 is in an abnormal measurement state.

[0037] Exemplarily, the set threshold value is 1%, and when the ratio of the difference between the determined mass flow and the measured mass flow to the determined mass flow is less than or equal to 1%, it is determined that the measurement state of the Coriolis mass flowmeter 100 is normal. Otherwise, it is determined that the measurement state of the Coriolis mass flowmeter 100 is abnormal.

[0038] The present application also provides a measurement state monitoring device of a Coriolis mass flowmeter, as shown in the accompanying drawings, the device comprises a deformation detection unit 110 and a field monitoring terminal 200. Figure 2 The deformation detection unit 110 is arranged on the measuring tube of the Coriolis mass flowmeter 100, and the deformation detection unit 110 is electrically connected to the field monitoring terminal 200.

[0039] The deformation detection unit 110 is arranged on the measuring tube of the Coriolis mass flowmeter 100, and the deformation detection unit 110 is electrically connected to the field monitoring terminal 200.

[0040] The field monitoring terminal 200 is used to obtain the deformation data of the deformation detection unit 110, and determine the mass flow of the medium passing through the Coriolis mass flowmeter 100 according to the deformation data.

[0041] The field monitoring terminal 200 is also used to obtain the mass flow measured by the Coriolis mass flowmeter 100, and compare the determined mass flow with the measured mass flow, and determine the measurement state of the Coriolis mass flowmeter 100 according to the comparison result.

[0042] In a possible embodiment, a remote monitoring terminal 300 is further included, and the field monitoring terminal 200 is in communication connection with the remote monitoring terminal 300 through a network; the field monitoring terminal 200 sends the determined measurement state of the Coriolis mass flowmeter 100 to the remote monitoring terminal 300.

[0043] For example, since the on-site monitoring terminal 200 is located near the Coriolis mass flow meter 100 being monitored, technicians need to go to the site to obtain the monitoring results, increasing their workload. Therefore, this invention uses a remote monitoring terminal 300 to receive the monitoring results obtained from the on-site monitoring terminal 200. If the monitoring results indicate that the measurement status of the Coriolis mass flow meter 100 is abnormal, the remote monitoring terminal 300 can issue an alarm, and technicians can then go to the site after receiving the alarm information.

[0044] In an embodiment of the present invention, the on-site monitoring terminal 200 and the remote monitoring terminal 300 are connected via a remote server. The on-site monitoring terminal 200 can communicate with the remote server via a wireless network, such as a cellular network or WiFi, and the remote monitoring terminal 300 can also communicate with the remote server via a wireless network, such as a cellular network or WiFi.

[0045] In one possible embodiment, a signal acquisition unit is also included, which is electrically connected between the deformation detection unit 110 and the field monitoring terminal 200; the signal acquisition unit is used to perform signal conditioning processing on the deformation data acquired by the deformation detection unit 110.

[0046] For example, the signal conditioning processing of deformation data by the signal acquisition unit includes amplification and filtering. Since the deformation of the measuring tube of the Coriolis mass flow meter 100 is very small, the electrical signal output by the deformation detection unit 110 is also very small. Therefore, the signal needs to be amplified first, and then filtered after the power is large enough to remove noise and interference from the signal.

[0047] In one possible embodiment, the deformation detection unit 110 is a strain gauge.

[0048] For example, the strain gauge mentioned above is a resistance strain gauge, whose detection accuracy fully meets the requirements for measuring the deformation of the measuring tube of the Coriolis mass flow meter 100.

[0049] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0050] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method of monitoring the condition of a Coriolis mass flowmeter, characterized by, The Coriolis mass flowmeter (100) is provided with a deformation detection unit (110) on the measuring tube, and the deformation detection unit (110) is electrically connected with a field monitoring terminal (200). The field monitoring terminal (200) acquires deformation data of the deformation detection unit (110); The field monitoring terminal (200) determines the mass flow of the medium passing through the Coriolis mass flowmeter (100) according to the deformation data; The field monitoring terminal (200) acquires the mass flow measured by the Coriolis mass flowmeter (100), compares the determined mass flow with the measured mass flow, and determines the measurement state of the Coriolis mass flowmeter (100) according to the comparison result; The field monitoring terminal (200) determines the mass flow corresponding to the deformation data according to a pre-set corresponding relationship between deformation and mass flow; The pre-set corresponding relationship between deformation and mass flow is obtained by measuring the deformation data and the mass flow when the Coriolis mass flowmeter (100) is in a normal measurement state; The deformation detection unit (110) is a strain gauge. When the field monitoring terminal (200) compares the determined mass flow with the measured mass flow, if the difference between the determined mass flow and the measured mass flow is less than or equal to a set threshold value, the field monitoring terminal (200) determines that the Coriolis mass flowmeter (100) is in a normal measurement state; 2. The method of claim 1, wherein the Coriolis mass flowmeter is a Coriolis vibrating flowmeter. If the difference between the determined mass flow and the measured mass flow is greater than the set threshold value, the field monitoring terminal (200) determines that the Coriolis mass flowmeter (100) is in an abnormal measurement state. The measurement state monitoring device of the Coriolis mass flowmeter is used to realize the measurement state monitoring method of the Coriolis mass flowmeter, and includes a deformation detection unit (110) and a field monitoring terminal (200); 3. A measurement condition monitoring device for a Coriolis mass flowmeter characterized by, The deformation detection unit (110) is arranged on the measuring tube of the Coriolis mass flowmeter (100), and the deformation detection unit (110) is electrically connected with the field monitoring terminal (200); The field monitoring terminal (200) is used to acquire deformation data of the deformation detection unit (110), and determine the mass flow of the medium passing through the Coriolis mass flowmeter (100) according to the deformation data; The field monitoring terminal (200) is also used to acquire the mass flow measured by the Coriolis mass flowmeter (100), compare the determined mass flow with the measured mass flow, and determine the measurement state of the Coriolis mass flowmeter (100) according to the comparison result. A remote monitoring terminal (300) is further included, and the field monitoring terminal (200) is in communication connection with the remote monitoring terminal (300) through a network; 4. A device for monitoring the condition of a Coriolis mass flowmeter according to claim 3 wherein, ​ The field monitoring terminal (200) transmits the determined measurement state of the Coriolis mass flowmeter (100) to the remote monitoring terminal (300).

5. A device for monitoring the condition of a Coriolis mass flowmeter according to claim 4 wherein, A remote server is further included, and the field monitoring terminal (200) and the remote monitoring terminal (300) are both in communication connection with the remote server through a network.

6. A device for monitoring the condition of a Coriolis mass flowmeter according to claim 3 wherein, A signal acquisition unit is further included, and the signal acquisition unit is electrically connected between the deformation detection unit (110) and the field monitoring terminal (200). The signal acquisition unit is used for signal conditioning processing of deformation data acquired by the deformation detection unit (110).

Images