Flow measuring instrument

Abstract

The utility model relates to a flow measuring instrument, which comprises a shell, a flow meter, a flow meter and a flow meter, the magnet exciting coil is positioned in the shell; the induction electrodes are arranged on the two sides of the excitation coil, and the induction ends of the induction electrodes extend out of the test end of the shell; the attitude sensor is arranged in the shell and is used for measuring real-time attitude data of the flow measuring instrument; and the controller is arranged in the shell and is in signal connection with the attitude sensor and the sensing electrode. According to the embodiment of the invention, a user can grasp the included angle of the flow measuring instrument relative to the flow direction of the liquid to be detected in real time in the process of installing and using the flow measuring instrument, so that the installation position of the flow measuring instrument is adjusted, additional measuring instruments are not needed, the adaptability of the flow measuring instrument to the installation environment can be improved, and the installation efficiency is improved. Therefore, accuracy and reliability of detection results of the flow velocity and the flow are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a flow measuring instrument. Background Art

[0002] Flow meters are widely used in various industrial fields to detect the flow rate and flow rate of liquids in pipelines. The principle of flow meters is to detect the flow rate and flow rate of liquids through sensing electrodes to achieve accurate measurement. However, in practical applications, in order to ensure the accuracy of the measurement results, it is necessary to keep the connection between the sensing electrodes of the flow meter perpendicular to the flow direction of the liquid. This requires that during the installation process, additional instruments must be used to detect the installation angle of the flow meter to ensure that it is installed correctly.

[0003] However, in the prior art, during the use or installation of the flow meter, there may be errors in the installation angle, which will affect the accuracy of the flow velocity and flow rate detection results and limit the performance and reliability of the flow meter in practical applications. Utility Model Content

[0004] In view of this, the present disclosure provides a technical solution for a flow meter.

[0005] In order to solve the above technical problems, according to one embodiment of the utility model, a flow meter is provided, comprising: a shell, the shell comprising a cable connection end and a test end; an excitation coil located in the shell; induction electrodes arranged on both sides of the excitation coil, the induction ends of the induction electrodes extending out of the test end of the shell; a posture sensor arranged in the shell, for measuring real-time posture data of the flow meter; a controller arranged in the shell, connected to the posture sensor and the induction electrode signals.

[0006] In a possible implementation, the shell includes an upper shell, a middle shell and a lower shell, and the upper shell, the middle shell and the lower shell are connected by threads; the excitation coil is located in the lower shell, and the posture sensor and the controller are located in the middle shell.

[0007] In a possible implementation manner, a metal shielding layer is provided between the controller and the excitation coil, and the metal shielding layer is located in the middle shell or the lower shell.

[0008] In a possible implementation, the flow meter also includes a power supply located in the middle shell, the power supply includes a boost circuit and an isolated buck circuit, the input end of the isolated buck circuit is electrically connected to the output end of the boost circuit, and the output end of the isolated buck circuit is electrically connected to the controller and the posture sensor respectively.

[0009] In a possible implementation, the controller includes a constant current drive circuit electrically connected to the boost circuit and the excitation coil.

[0010] In a possible implementation, the controller includes an amplifier circuit and an analog-to-digital conversion circuit, and the amplifier circuit is connected to the analog-to-digital conversion circuit and the sensing electrode signal.

[0011] In a possible implementation, the flow meter further includes a hydraulic sensor disposed at the test end, and the hydraulic sensor is signal-connected to the controller.

[0012] In a possible implementation, the flow meter further includes an air pressure sensor, and the air pressure sensor is used to measure the atmospheric pressure.

[0013] In a possible implementation, the shell is provided with a through hole communicating with the outside of the shell, and the air pressure sensor is arranged in the through hole.

[0014] In a possible implementation, the flow meter further includes an RS485 interface disposed at the cable connection end for signal connection with the controller.

[0015] The flow meter of the disclosed embodiment includes a shell, the shell includes a cable connection end and a test end; an excitation coil located in the shell; induction electrodes are arranged on both sides of the excitation coil, and the induction ends of the induction electrodes extend out of the test end of the shell; a posture sensor is arranged in the shell, which is used to measure the real-time posture data of the flow meter; and a controller is arranged in the shell, which is connected to the posture sensor and the induction electrode signal. Through the flow meter of the disclosed embodiment, the real-time posture data corresponding to the flow meter can be detected, so that the user can grasp the angle of the flow meter relative to the flow direction of the liquid to be detected in real time during the installation and use of the flow meter, so that the user can adjust the installation position of the flow meter, or based on the real-time posture data, the accuracy of the flow velocity detection results and flow detection results obtained by the flow meter can be checked or corrected.

[0016] Other features and aspects of the present invention will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the invention and, together with the description, serve to explain the principles of the invention.

[0018] Figure 1 A schematic diagram showing a flow rate measurement error in the prior art;

[0019] Figure 2 A block diagram showing a flow measuring instrument according to an embodiment of the present disclosure is shown;

[0020] Figure 3 A schematic structural diagram of a flow measuring instrument according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0021] Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0022] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0023] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0024] In addition, in order to better illustrate the utility model, numerous specific details are given in the specific embodiments below. It should be understood by those skilled in the art that the utility model can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the utility model.

[0025] Electromagnetic Flowmeters (EMF) is an instrument that measures the flow rate and flow rate of a liquid based on the induced electromotive force generated when the liquid passes through an external magnetic field. It has the advantages of high accuracy, good stability, and is not affected by changes in the liquid's own viscosity, temperature, and other conditions. It is widely used in various industrial fields.

[0026] Flow meters in the prior art are usually designed based on Faraday's law of electromagnetic induction. When the liquid in the pipeline (such as water, or acid, alkali, salt solution, etc.) passes through the constant magnetic field generated by the flow meter, it is equivalent to cutting the magnetic flux lines of the constant magnetic field, thereby generating an induced electromotive force in the liquid. The induced electromotive force in the liquid can be expressed as formula (1):

[0027] E=BLV (1)

[0028] Wherein, E represents the induced electromotive force; B represents the magnetic induction intensity of the magnetic field applied to the liquid; L represents the effective distance between two sensing electrodes used to measure the induced electromotive force in the flow meter in the direction perpendicular to the flow velocity of the liquid; and V represents the flow velocity of the liquid.

[0029] According to formula (1), when using a flow meter to detect the flow velocity V of a liquid, in addition to detecting the induced electromotive force E between the two sensing electrodes, it is also necessary to determine the magnetic induction intensity B of the magnetic field applied to the liquid, and the effective distance L between the two sensing electrodes in the flow meter used to measure the induced electromotive force in the direction perpendicular to the liquid flow direction.

[0030] In the prior art, it is usually preset that the line between the two sensing electrodes is perpendicular to the liquid flow direction, and the distance corresponding to the line between the two sensing electrodes is directly used as the effective distance in the direction perpendicular to the liquid flow direction, so as to determine the flow rate of the liquid according to the above formula (1).

[0031] Therefore, in order to ensure the accuracy of the measurement results, during the installation of the flow meter, an additional measuring instrument must be used to detect the installation angle of the flow meter to ensure that the connection line between the two sensing electrodes is perpendicular to the liquid flow direction.

[0032] However, in actual application, on the one hand, due to the limited space of the installation environment and the complex shape of the target pipeline, it may be inconvenient to use additional measuring instruments to detect the installation angle of the flow meter, resulting in the installation position of the flow meter being unable to accurately keep the line between the two sensing electrodes perpendicular to the liquid flow direction. On the other hand, after the flow meter is installed, there may be wear and tear, deformation of the pipe where the flow meter is installed, etc., which may change the posture of the flow meter and cause the angle between the line between the two sensing electrodes and the vertical direction of the liquid flow direction to change. The above problems will affect the accuracy of the flow velocity and flow detection results, and will also limit the performance and reliability of the flow meter in actual applications.

[0033] Figure 1 A schematic diagram showing a flow rate measurement error in the prior art is shown. Figure 1As shown, there is an offset angle θ between the line connecting the sensing electrode 101 and the sensing electrode 102 of the flow meter and the vertical direction of the liquid flow direction. The distance corresponding to the line connecting the sensing electrode 101 and the sensing electrode 102 is L1, and the actual effective distance between the sensing electrode 101 and the sensing electrode 102 is L2. At this time, the flow rate of the liquid determined according to the above formula (1) and the distance L1 corresponding to the line connecting the sensing electrode 101 and the sensing electrode 102 has a detection error relative to the actual flow rate of the liquid, which reduces the accuracy and reliability of the flow meter.

[0034] In view of this, the embodiment of the present disclosure provides a flow meter, and the real-time posture data corresponding to the flow meter can be obtained through the posture sensor, so that the user can grasp the angle of the flow meter relative to the flow direction of the liquid to be detected in real time during the installation and use of the flow meter, so as to adjust the installation position of the flow meter. No additional measuring instruments are required, and the adaptability of the flow meter to the installation environment can be improved, thereby ensuring the accuracy and reliability of the flow rate and flow rate detection results. In addition, based on the real-time posture data, the user can verify or correct the accuracy of the flow rate and flow rate detection results during use. The flow meter of the embodiment of the present disclosure is described in detail below.

[0035] Figure 2 FIG. 1 is a block diagram of a flow meter according to an embodiment of the present disclosure. Figure 2 As shown, the flow meter 200 includes:

[0036] Shell 201, shell 201 includes a cable connection end 2011 and a test end 2012; an excitation coil 202 located in the shell 200; induction electrodes 203 are arranged on both sides of the excitation coil 202, and the induction ends of the induction electrodes 203 extend out of the test end 2012 of the shell 201; a posture sensor 204 is arranged in the shell 201, and is used to measure the real-time posture data of the flow meter 200; a controller 205 is arranged in the shell 201, and is connected to the posture sensor 204 and the induction electrode 203 signal.

[0037] The specific material and shape of the shell 201 can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations on this.

[0038] The housing 201 may include a cable connection end 2011 and a test end 2012. The cable connection end 2011 may be used to realize the cable connection between the flow meter 200 and the outside world, and may realize the input of external power supply and / or the output of the detection data in the flow meter 200; the specific form of the cable connection end 2011 may be flexibly set according to actual use requirements, for example, the cable connection end 2011 may include multiple input / output interfaces, etc., and the present disclosure does not make specific limitations on this.

[0039] The test end 2012 can be in contact with the liquid to be detected. The specific form of the test end 2012 can be flexibly set according to actual use requirements, and the present disclosure does not make specific limitations on this. The liquid to be detected here can represent a fluid that flows through the target pipeline where the flow meter 200 is installed and needs to measure the flow rate and flow rate. The fluid is preferably a conductive fluid. The specific form of the liquid to be detected can be flexibly set according to actual use requirements, for example, it can be water, sewage, acid, alkali, salt solution, mud or pulp, etc., and the present disclosure does not make specific limitations on this.

[0040] The excitation coil 202 is arranged inside the shell 201, and induction electrodes 203 are respectively arranged on both sides. The excitation coil 202 can generate a constant magnetic field based on the Faraday electromagnetic induction principle, and apply the constant magnetic field to the liquid to be detected. The specific values ​​of the parameters corresponding to the excitation coil 202 can be flexibly set according to actual usage requirements, and the present disclosure does not make specific restrictions on this. Among them, the parameters corresponding to the excitation coil 202 may include coil material, coil structure (such as coil winding direction, number of coil turns and interlayer insulation design, etc.), coil shape and size, etc.; the specific excitation method of the excitation coil 202 can be based on the implementation methods in the reference related technology, such as DC excitation, etc., and the present disclosure does not make specific restrictions on this.

[0041] The induction electrode 203 extends out of the test end 2012 of the housing 201 and contacts the liquid to be detected. When the liquid to be detected flows through the constant magnetic field generated by the excitation coil 202, it is equivalent to cutting the magnetic flux lines of the constant magnetic field, thereby generating a corresponding induced electromotive force on the induction electrode 203. The specific form of the induction electrode 203 can refer to the implementation in the related art, and the present disclosure does not specifically limit this.

[0042] The posture sensor 204 is disposed inside the housing 201 and can be used to measure the real-time posture data of the flow meter 200. The specific content of the real-time posture data can be flexibly set according to actual use requirements, for example, it can include the angle of the flow meter 200 relative to the flow direction of the liquid to be detected, etc., which is not specifically limited in the present disclosure; the specific form of the posture sensor 204 can refer to the implementation in the relevant technology, which is not specifically limited in the present disclosure.

[0043] Through real-time posture data, users can grasp the angle of the flow meter relative to the flow direction of the liquid to be detected in real time during the installation of the flow meter 200. No additional measuring instruments are required, which can reduce the difficulty of installation and enable the flow meter 200 to adapt to complex installation environments, improve the applicability of the flow meter 200, and ensure the accuracy and reliability of the flow rate and flow detection results determined based on the flow meter 200.

[0044] The sensing electrode 203 and the posture sensor 204 are respectively connected to the controller 205 by signal. Signal connection can mean that the sensing electrode 203 and the posture sensor 204 are respectively electrically connected to the controller 205 and can perform data transmission. The data transmission method here can be flexibly set according to actual usage requirements, and this disclosure does not specifically limit this.

[0045] The controller 205 can determine the flow rate detection result corresponding to the liquid to be detected based on the aforementioned formula (1) according to the induced electromotive force from the sensing electrode 203, the magnetic field strength corresponding to the constant magnetic field generated by the excitation coil 202, and the distance between the connecting lines of the sensing electrodes 203.

[0046] Furthermore, the controller 205 can also determine the flow detection result corresponding to the liquid to be detected according to the flow velocity detection result and the cross-sectional area corresponding to the target pipeline. The flow detection result can be expressed as formula (2):

[0047] Q=SV (2)

[0048] Among them, Q represents the flow detection result corresponding to the liquid to be detected; V represents the flow velocity detection result corresponding to the liquid to be detected; S represents the cross-sectional area corresponding to the target pipeline.

[0049] After determining the flow velocity detection result and flow rate detection result corresponding to the liquid to be detected, the controller 205 can transmit the detection data such as the flow rate detection result to the user. The specific method of transmitting the above detection data can be flexibly set according to the actual use requirements. For example, it can be output through a data transmission cable via the cable connection terminal 2011, or it can be output through a wireless communication network, which is not specifically limited in the present disclosure.

[0050] The flow meter of the disclosed embodiment includes a shell, the shell includes a cable connection end and a test end; an excitation coil located in the shell; induction electrodes are arranged on both sides of the excitation coil, and the induction ends of the induction electrodes extend out of the test end of the shell; a posture sensor is arranged in the shell, which is used to measure the real-time posture data of the flow meter; and a controller is arranged in the shell, which is connected to the posture sensor and the induction electrode signal. Through the flow meter of the disclosed embodiment, the real-time posture data corresponding to the flow meter can be detected, so that the user can grasp the angle of the flow meter relative to the flow direction of the liquid to be detected in real time during the installation and use of the flow meter, so that the user can adjust the installation position of the flow meter, or based on the real-time posture data, the accuracy of the flow velocity detection results and flow detection results obtained by the flow meter can be checked or corrected.

[0051] In a possible implementation, the shell 201 includes an upper shell, a middle shell and a lower shell, which are connected by threads; the excitation coil 202 is located in the lower shell, and the posture sensor 204 and the controller 205 are located in the middle shell.

[0052] Among them, the specific shapes and structures of the upper shell, the middle shell and the lower shell can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations on this.

[0053] Figure 3 FIG. 2 is a schematic diagram showing the structure of a flow meter according to an embodiment of the present disclosure. Figure 3 As shown, the housing 201 includes an upper housing 301, a middle housing 302 and a lower housing 303. The excitation coil 202 is located in the lower housing 303, and the attitude sensor 204 and the controller 205 are located in the middle housing 302. The cable connection terminal 2011 is arranged at the upper housing 301, and the test terminal 2012 is arranged at the lower housing 203.

[0054] The upper shell 301 , the middle shell 302 and the lower shell 303 may be connected by threads, so that the user can disassemble and repair the flow meter 200 .

[0055] In a possible implementation, a metal shielding layer is provided between the controller 205 and the excitation coil 202 , and the metal shielding layer is located inside the middle shell or the lower shell.

[0056] In order to reduce the electromagnetic interference of the excitation coil 202 to the controller 205, enable the controller 205 to work normally, and ensure the reliability of the controller 205, a metal shielding layer can be provided between the controller 205 and the excitation coil 202. The specific material of the metal shielding layer can be flexibly set according to actual use requirements, and the present disclosure does not make specific restrictions on this.

[0057] The metal shielding layer can be located in the middle shell of the shell 201 or in the lower shell of the shell 201, depending on the specific shape and structure of the shell 201 and the relative position distribution of the controller 205 and the excitation coil 202. The present disclosure does not make specific limitations on this.

[0058] With the above Figure 3 For example, Figure 3 As shown, the metal shielding layer 304 is disposed in the middle shell 302 to achieve electromagnetic isolation between the controller 205 and the excitation coil 202 .

[0059] In one possible implementation, the flow meter 200 also includes a power supply located in the middle shell, the power supply includes a boost circuit and an isolated buck circuit, the input end of the isolated buck circuit is electrically connected to the output end of the boost circuit, and the output end of the isolated buck circuit is electrically connected to the controller 205 and the posture sensor 204 respectively.

[0060] With the above Figure 2 For example, Figure 2 As shown, the flow meter 200 further includes a power source 206 disposed in the housing 201 .

[0061] Specifically, the power supply 206 can be disposed in the middle shell, including a boost circuit and an isolated buck circuit. The specific forms of the boost circuit and the isolated buck circuit can refer to the implementation methods in the related art, and the present disclosure does not specifically limit this.

[0062] The boost circuit can be used to boost the input power supply voltage and determine a first voltage after the boost; the input end of the isolated step-down circuit can be electrically connected to the output end of the boost circuit, and can be used to step down the first voltage and determine a second voltage after the step-down, and the second voltage is less than the first voltage.

[0063] The output end of the isolated step-down circuit can be electrically connected to the controller 205 and the posture sensor 204 respectively. The second voltage can be used to power the controller 205 and the posture sensor 204, and the first voltage can be isolated from the power supply to achieve electrical isolation between the high-voltage area and the low-voltage area, thereby reducing the interference of the boost circuit to the isolated step-down circuit, the controller 205, the posture sensor 204 and other low-voltage electrical components, avoiding arc discharge from the high-voltage area to the low-voltage area, and improving the safety and reliability of the flow meter 200.

[0064] In a possible implementation, the controller 205 includes a constant current drive circuit electrically connected to the boost circuit and the excitation coil 202 .

[0065] The controller 205 may include a constant current drive circuit. The constant current drive circuit may be electrically connected to the boost circuit and the excitation coil 202, respectively, for generating an excitation current according to a first voltage from the boost circuit, and transmitting the excitation current to the excitation coil 202, so that the excitation coil 202 may generate a constant magnetic field according to the excitation current.

[0066] The specific form of the constant current driving circuit can refer to the implementation methods in the relevant technology, and the present disclosure does not make any specific limitation on this.

[0067] Furthermore, the actual current value of the excitation current can be adjusted through the constant current driving circuit, thereby adjusting the magnetic field strength corresponding to the constant magnetic field, thereby achieving flexible control of the detection accuracy of the flow meter 200, thereby improving the applicability of the flow meter 200.

[0068] In a possible implementation, the controller 205 includes an amplifier circuit and an analog-to-digital conversion circuit, and the amplifier circuit is signal-connected to the analog-to-digital conversion circuit and the sensing electrode 203 .

[0069] The controller 205 may also include an amplifier circuit and an analog-to-digital conversion circuit. The amplifier circuit is connected to the analog-to-digital conversion circuit and the sensing electrode 203 signal, respectively, and can be used to collect the induced electromotive force generated on the sensing electrode 203, amplify the induced electromotive force, and transmit the amplified induced electromotive force to the analog-to-digital conversion circuit, thereby avoiding errors caused by too small induced electromotive force when the induced electromotive force is subsequently processed.

[0070] The analog-to-digital conversion circuit can be used to convert the amplified induced electromotive force into a digital signal, so that the controller 205 can quickly determine the flow rate detection result according to the digital signal.

[0071] In a possible implementation, the flow meter 200 further includes a hydraulic sensor disposed at the test end 2011 , and the hydraulic sensor is signal-connected to the controller 205 .

[0072] The method of determining the flow detection result corresponding to the liquid to be detected according to the flow velocity detection result corresponding to the liquid to be detected and the cross-sectional area corresponding to the target pipeline through the aforementioned formula (2) is usually applied to the scenario where the liquid to be detected fills the target pipeline. However, when the liquid to be detected does not fill the target pipeline, the flow detection result determined according to formula (2) will have a large error relative to the actual flow corresponding to the liquid to be detected. Therefore, the flow meter 200 of the embodiment of the present disclosure can also obtain real-time hydraulic data corresponding to the liquid to be detected through a hydraulic sensor arranged at the test end 2011, so that the user can use the real-time hydraulic data to determine whether the liquid to be detected fills the target pipeline and verify the accuracy of the flow monitoring result, thereby improving the reliability of the flow meter 200.

[0073] Specifically, the hydraulic sensor can be arranged in the test end 2011 and contact the liquid to be detected to detect the real-time hydraulic data of the bottom of the liquid to be detected. The specific form of the hydraulic sensor can refer to the implementation in the related art, and the present disclosure does not make any specific limitation on this; the specific content of the real-time hydraulic data can be flexibly set according to the actual use requirements, and the present disclosure does not make any specific limitation on this.

[0074] The hydraulic sensor may also be signal-connected to the controller 205 and transmit real-time hydraulic data to the controller 205 .

[0075] In a possible implementation, the flow meter 200 further includes an air pressure sensor, which is used to measure the atmospheric pressure.

[0076] In the case where the real-time hydraulic data reflects that the liquid to be detected does not fill the target pipeline, the flow detection result directly determined based on the flow meter 200 will have a large error relative to the actual flow corresponding to the liquid to be detected. At this time, in order to further improve the reliability and applicability of the flow meter 200, the flow meter 200 may also include an air pressure sensor. The air pressure sensor can be in contact with the atmosphere in the target pipeline to measure the atmospheric pressure in the target pipeline. Among them, the specific form of the air pressure sensor can be flexibly set according to actual use requirements, and the present disclosure does not make specific restrictions on this; the specific position of the air pressure sensor can be flexibly set according to actual use requirements, and can be set inside the flow meter 200, or can be set as a detachable component outside the flow meter 200, etc., and the present disclosure does not make specific restrictions on this.

[0077] In one example, the air pressure sensor can be provided as a detachable component outside the flow measurement instrument 200 and mounted on top of the inner surface of the target pipe.

[0078] The air pressure sensor may also be connected to the controller 205 signal and transmit the atmospheric pressure to the controller 205 .

[0079] The atmospheric pressure in the target pipeline is obtained through the air pressure sensor, so that the user can use the atmospheric pressure and real-time hydraulic data to determine the actual liquid area of ​​the liquid to be tested, thereby correcting the flow test results.

[0080] In a possible implementation, the housing 201 is provided with a through hole communicating with the outside of the housing 201 , and the air pressure sensor is disposed in the through hole, so as to measure the atmospheric pressure in the target pipeline.

[0081] With the above Figure 2 For example, Figure 2 As shown, the housing 201 is provided with a through hole 2013 communicating with the outside of the housing 201 .

[0082] In order to reduce the structural complexity of the flow meter 200 and the difficulty of installing the flow meter 200, the air pressure sensor can be arranged in the housing 201 and contact the atmosphere in the target pipeline through the through hole 2013 to detect the atmospheric pressure in the target pipeline. The specific position, shape and number of the through hole can be flexibly set according to actual use requirements, and the present disclosure does not make specific restrictions on this.

[0083] In a possible implementation, the flow meter 200 further includes an RS485 interface disposed at the cable connection end 2011 for signal connection with the controller 205 .

[0084] The RS485 interface can be set in the cable connection end 2011 and connected to the controller 205 signal for outputting the detection data in the controller 205, wherein the specific content of the detection data can be flexibly set according to actual usage requirements, for example, it can include at least one of flow rate detection results, flow detection results, real-time posture data, real-time hydraulic data and atmospheric pressure, and the present disclosure does not make specific limitations on this.

[0085] Since the RS485 interface has good anti-interference performance and can perform long-distance, multi-node data transmission, using the RS485 interface to output test data can improve the flexibility and convenience of users in obtaining test data and reduce data transmission errors caused by external environmental interference.

[0086] The flow meter of the disclosed embodiment includes a shell, the shell includes a cable connection end and a test end; an excitation coil located in the shell; induction electrodes are arranged on both sides of the excitation coil, and the induction ends of the induction electrodes extend out of the test end of the shell; a posture sensor is arranged in the shell, which is used to measure the real-time posture data of the flow meter; and a controller is arranged in the shell, which is connected to the posture sensor and the induction electrode signal. Through the flow meter of the disclosed embodiment, the real-time posture data corresponding to the flow meter can be detected, so that the user can grasp the angle of the flow meter relative to the flow direction of the liquid to be detected in real time during the installation and use of the flow meter, so that the user can adjust the installation position of the flow meter, or based on the real-time posture data, the accuracy of the flow velocity detection results and flow detection results obtained by the flow meter can be checked or corrected.

[0087] It should be noted that although Figure 2 and Figure 3 The flow meter of the embodiment of the present disclosure is introduced as an example, but those skilled in the art will understand that the present invention should not be limited to this. In fact, the user can flexibly set the specific structure of the flow meter of the embodiment of the present disclosure according to personal preferences and / or actual application scenarios, adaptively increase or decrease the electrical components included therein, and / or adjust the installation sequence of each electrical component, as long as it can be based on the above content and according to the above structure, to obtain the real-time posture data corresponding to the flow meter, so that the user can adjust the installation position of the flow meter, thereby improving the accuracy and reliability of the flow meter.

[0088] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A flow measuring instrument, characterized in that: include: A housing, the housing comprising a cable connection end and a test end; an excitation coil located in the housing; Induction electrodes are arranged on both sides of the excitation coil, and the induction ends of the induction electrodes extend out of the test end of the shell; A posture sensor disposed in the housing, for measuring real-time posture data of the flow meter; The controller disposed in the housing is connected to the posture sensor and the sensing electrode signals.

2. The flow meter according to claim 1, characterized in that: The housing comprises an upper shell, a middle shell and a lower shell, and the upper shell, the middle shell and the lower shell are connected by threads; The excitation coil is located in the lower shell, and the posture sensor and the controller are located in the middle shell.

3. The flow meter according to claim 2, characterized in that: A metal shielding layer is arranged between the controller and the excitation coil, and the metal shielding layer is located in the middle shell or the lower shell.

4. The flow meter according to claim 2, characterized in that: The flow meter also includes a power supply located in the middle shell, the power supply includes a boost circuit and an isolated buck circuit, the input end of the isolated buck circuit is electrically connected to the output end of the boost circuit, and the output end of the isolated buck circuit is electrically connected to the controller and the posture sensor respectively.

5. The flow meter according to claim 4, characterized in that: The controller includes a constant current driving circuit electrically connected to the boost circuit and the excitation coil.

6. The flow meter according to any one of claims 1 to 4, characterized in that: The controller comprises an amplifying circuit and an analog-to-digital conversion circuit, and the amplifying circuit is connected to the analog-to-digital conversion circuit and the sensing electrode signal.

7. The flow meter according to any one of claims 1 to 4, characterized in that: The flow meter further comprises a hydraulic sensor disposed at the test end, and the hydraulic sensor is connected to the controller by signal.

8. The flow meter according to claim 7, characterized in that: The flow meter also includes an air pressure sensor, which is used to measure the atmospheric pressure.

9. The flow measuring instrument according to claim 8, characterized in that: The shell is provided with a through hole which is communicated with the outside of the shell, and the air pressure sensor is arranged in the through hole.

10. The flow meter according to any one of claims 1 to 4, characterized in that: The flow meter also includes an RS485 interface arranged at the cable connection end for connecting to the controller signal.

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