Electromagnetic flowmeter
阅读说明:本技术 一种电磁流量计 (Electromagnetic flowmeter ) 是由 周乐 黄稀荻 常子敬 孟祥� 于 2018-11-30 设计创作,主要内容包括:一种电磁流量计,具体包括:测定管(10),测定管(10)用于供待测流体流动;励磁线圈(11),励磁线圈(11)缠绕在测定管(10)外,用于产生磁场;第一电极(12)和第二电极(13),第一电极(12)和第二电极(13)分开地设置于测定管(10)的两侧,用于形成与所述待测流体的流量成正比的电动势信号;放大电路板(14),放大电路板(14)与第一电极(12)、第二电极(13)之间导通,且放大电路板(14)与第一电极(12)之间、放大电路板(14)与第二电极(13)之间刚性连接。该电磁流量计可以避免测量结果失真的情况,实现较高的测量精度。(An electromagnetic flow meter, comprising: the measuring tube (10), the measuring tube (10) is used for the fluid to be measured to flow; the excitation coil (11), the excitation coil (11) is twined outside the survey tube (10), is used for producing the magnetic field; the device comprises a first electrode (12) and a second electrode (13), wherein the first electrode (12) and the second electrode (13) are separately arranged on two sides of a measuring tube (10) and used for forming an electromotive force signal in direct proportion to the flow of a fluid to be measured; and the amplifying circuit board (14) is conducted with the first electrode (12) and the second electrode (13), and the amplifying circuit board (14) is rigidly connected with the first electrode (12) and the amplifying circuit board (14) is rigidly connected with the second electrode (13). The electromagnetic flowmeter can avoid the situation of distortion of the measuring result and realize higher measuring precision.)
1. An electromagnetic flow meter, comprising:
the measuring tube is used for flowing the fluid to be measured;
an excitation coil wound outside the measurement tube for generating a magnetic field;
the first electrode and the second electrode are separately arranged on two sides of the measuring tube and are used for forming an electromotive force signal which is in direct proportion to the flow of the fluid to be measured;
the amplifying circuit board is communicated with the first electrode and the second electrode, and the amplifying circuit board is rigidly connected with the first electrode and the second electrode.
2. An electromagnetic flowmeter as set forth in claim 1 wherein said amplifying circuit board and said first electrode and said amplifying circuit board and said second electrode are connected by electrically conductive fasteners.
3. The electromagnetic flowmeter of claim 2 wherein the conductive fastener is disposed at a predetermined angle to a winding direction of the field coil.
4. The electromagnetic flowmeter of claim 2 wherein the amplifying circuit board comprises a first sub-circuit board and a second sub-circuit board, wherein
The first sub circuit board is rigidly connected with the first electrode;
the second sub circuit board is rigidly connected with the second electrode.
5. The electromagnetic flowmeter of claim 4, wherein the first sub circuit board and the second sub circuit board are respectively provided with a first through hole;
second threaded holes are formed in the first electrode and the second electrode respectively;
the conductive fastener sequentially passes through the first through hole on the first sub circuit board and the second threaded hole on the first electrode to realize the conduction and rigid connection between the first sub circuit board and the first electrode;
and the conductive fastener sequentially passes through the first through hole on the second sub circuit board and the second threaded hole on the second electrode to realize conduction and rigid connection between the second sub circuit board and the second electrode.
6. The electromagnetic flow meter of claim 4, wherein the amplification circuit board further comprises: a flexible circuit board; wherein
The flexible circuit board is respectively connected with the first sub circuit board and the second sub circuit board.
7. The electromagnetic flow meter of claim 4, wherein the amplification circuit board further comprises: a power connection module; wherein
The power supply connection module is arranged on the first sub circuit board or the second sub circuit board.
8. An electromagnetic flowmeter according to claim 1 wherein said amplifying circuit board and said first electrode are soldered to each other and said amplifying circuit board and said second electrode are soldered to each other.
9. The electromagnetic flowmeter of claim 1 further comprising: a sealing gasket; wherein
The sealing gasket is arranged between the first electrode and one end of the measuring tube and used for realizing the sealing connection between the first electrode and the measuring tube;
the sealing gasket is also arranged between the second electrode and the other end of the measuring tube and is used for realizing the sealing connection between the second electrode and the measuring tube.
10. The electromagnetic flowmeter of claim 1 wherein said amplifying circuit board has an amplifying circuit disposed therein; wherein
The amplifying circuit is respectively connected with the first electrode and the second electrode and is used for amplifying the electromotive force signals formed by the first electrode and the second electrode.
11. An electromagnetic flowmeter as set forth in claim 10 wherein said amplifying circuit board includes a filter therein.
12. The electromagnetic flowmeter of claim 1 further comprising: a housing; wherein
The measuring tube, the excitation coil and the amplifying circuit board are respectively fixed on the shell.
13. The electromagnetic flowmeter of claim 12 wherein the housing further comprises an inlet flow tube and an outlet flow tube; wherein
The flow inlet pipe and the flow outlet pipe are respectively communicated with the measuring pipe.
Technical Field
The invention relates to the technical field of electronic devices, in particular to an electromagnetic flowmeter.
Background
When the electromagnetic flowmeter is used for measuring the flow of fluid, the electromagnetic flowmeter is not influenced by the change of the density, viscosity, temperature, pressure and conductivity of the fluid, so that the electromagnetic flowmeter has obvious advantages when being applied to the field of agricultural unmanned aerial vehicles with variable media. Moreover, the low straight pipe section of the electromagnetic flowmeter requires no moving parts, so that the installation space of the electromagnetic flowmeter is smaller, and therefore, the installation of the electromagnetic flowmeter on the agricultural unmanned aerial vehicle also has obvious advantages.
In the existing electromagnetic flowmeter, a lead is often used for connecting an electrode and a signal amplification circuit. In practical applications, in order to reduce interference of the excitation coil on signal transmission of the conducting wire, a shielding wire is often required to be connected between the electrode and the signal amplifying circuit. Specifically, the shield wires may be soldered to the electrodes and the signal amplification circuit, respectively.
However, in the conventional electromagnetic flowmeter, since the connection part between the shield wire and the electrode and the signal amplification circuit is difficult to shield, the shield wire is easily interfered by the excitation coil during signal transmission, so that the defect that the signal of the shield wire is unstable during signal transmission is easily caused, and furthermore, the measurement result of the electromagnetic flowmeter is easily distorted.
Disclosure of Invention
In view of this, in order to solve the problem that the conventional electromagnetic flowmeter is easy to have a distorted measurement result, an embodiment of the present invention provides an electromagnetic flowmeter.
The embodiment of the invention discloses an electromagnetic flowmeter, which comprises:
the measuring tube is used for flowing the fluid to be measured;
an excitation coil wound outside the measurement tube for generating a magnetic field;
the first electrode and the second electrode are separately arranged on two sides of the measuring tube and are used for forming an electromotive force signal which is in direct proportion to the flow of the fluid to be measured;
the amplifying circuit board is communicated with the first electrode and the second electrode, and the amplifying circuit board is rigidly connected with the first electrode and the second electrode.
The embodiment of the invention has the following advantages:
in the embodiment of the invention, the amplifying circuit board is conducted with the first electrode and the second electrode, and the amplifying circuit board is conducted with the first electrode, the amplifying circuit board is conducted with the second electrode
The second electrodes are rigidly connected, so that the arrangement of shielding wires between the amplifying circuit board and the first and second electrodes for connection can be avoided. Therefore, in the process of transmitting the electromotive force signals formed by the first electrode and the second electrode to the amplifying circuit board, the electromotive force signals are difficult to be interfered by the exciting coil, so that the defect of unstable signals is caused, the situation that the measuring result of the electromagnetic flowmeter is distorted is avoided, and the measuring precision of the electromagnetic flowmeter can be improved.
Drawings
FIG. 1 is a schematic perspective view of an electromagnetic flowmeter of the present invention;
FIG. 2 is a schematic cross-sectional view of the electromagnetic flow meter shown in FIG. 1;
fig. 3 is a schematic top down view of the electromagnetic flowmeter shown in fig. 1.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The embodiment of the invention provides an electromagnetic flowmeter, which specifically comprises: a measurement tube, which can be used for flowing the fluid to be measured; an excitation coil wound outside the measurement tube for generating a magnetic field; the first electrode and the second electrode are separately arranged on two sides of the measuring tube and are used for forming an electromotive force signal which is in direct proportion to the flow of the fluid to be measured; the amplifying circuit board is communicated with the first electrode and the second electrode, and the amplifying circuit board is rigidly connected with the first electrode and the second electrode.
In the embodiment of the invention, the amplifying circuit board is conducted with the first electrode and the second electrode, and the amplifying circuit board is rigidly connected with the first electrode and the amplifying circuit board is rigidly connected with the second electrode, so that the amplifying circuit board can be prevented from being connected with the first electrode and the second electrode by arranging shielding wires. Therefore, in the process of transmitting the electromotive force signals formed by the first electrode and the second electrode to the amplifying circuit board, the electromotive force signals are difficult to be interfered by the exciting coil, so that the defect of unstable signals is caused, the situation that the measuring result of the electromagnetic flowmeter is distorted is avoided, and the measuring precision of the electromagnetic flowmeter can be improved.
Referring to fig. 1, a schematic perspective view of an electromagnetic flowmeter according to the present invention is shown, referring to fig. 2, a schematic sectional view of the electromagnetic flowmeter shown in fig. 1 is shown, and referring to fig. 3, a schematic top-down view of the electromagnetic flowmeter shown in fig. 1 is shown. The method specifically comprises the following steps:
an
And an excitation coil 11 wound outside the
The measuring tube comprises a
And the amplifying
In the embodiment of the present invention, the
In practical applications, the
In the embodiment of the present invention, the electromagnetic flow meter may further include a
It is understood that in practical applications, the
In an embodiment of the present invention, the electromagnetic flowmeter may further include: and the amplifying
Specifically, an amplification circuit is provided in the
Optionally, the amplifying circuit may include a filter, and the filter may be configured to filter out noise in the electromotive force signal, so as to improve the signal quality of the electromotive force signal.
In the embodiment of the present invention, since the amplifying
Specifically, the amplifying
In practical applications, the amplifying
It should be understood that, in fig. 1 to fig. 3, in order to clearly illustrate the structure of the enlarged
In an alternative embodiment of the present invention, the connection between the amplifying
In practical applications, the
Specifically, the first
The
The
In practical application, under the condition that the amplifying
In another alternative embodiment of the present invention, the connection between the amplifying
In practical applications, the electromagnetic flowmeter may further include: a
Specifically, the
In the embodiment of the present invention, the amplifying
In practical applications, the electromagnetic flow meter may further include a
Specifically, the
In summary, the electromagnetic current meter according to the embodiment of the present invention at least has the following advantages:
in the embodiment of the invention, the amplifying circuit board is conducted with the first electrode and the second electrode, and the amplifying circuit board is rigidly connected with the first electrode and the amplifying circuit board is rigidly connected with the second electrode, so that the amplifying circuit board can be prevented from being connected with the first electrode and the second electrode by arranging shielding wires. Therefore, in the process of transmitting the electromotive force signals formed by the first electrode and the second electrode to the amplifying circuit board, the electromotive force signals are difficult to be interfered by the exciting coil, so that the defect of unstable signals is caused, the situation that the measuring result of the electromagnetic flowmeter is distorted is avoided, and the measuring precision of the electromagnetic flowmeter can be improved.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these 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 embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The electromagnetic current meter provided by the invention is described in detail, and the principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
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