Magnetoelectric integrated sensor

Abstract

The utility model discloses a magnetoelectric integrated sensor, which comprises a magnet, a coil, a high-performance spring, an upper shielding layer, a lower shielding layer, an adjusting circuit board and a precise measurement circuit board, the magnet is fixed on the lower shielding layer through a high-performance spring; the coil is wound on the outer side of the magnet through the coil bracket; two ends of the coil are connected with one end of the welding pin through leads; the welding pin is connected with the adjusting circuit board and the precision measuring circuit board; the adjusting circuit board and the precision measuring circuit board are sealed in the upper shielding layer. The sensor is simple in overall structure, and can convert an original vibration speed original signal into a 4-20mA standard current signal for transmission with a small volume when a circuit board is precisely measured to measure a rotating machine; the device can be used for measuring the vibration of bearing bushes of rotary machinery such as a steam turbine, a fan and a water pump, and output standard 4-20mA current signals corresponding to the measurement range of a selected full scale (such as 0-200mu m or 0-25mm / s) can be directly and remotely transmitted to a PLC (Programmable Logic Controller), a DCS (Distributed Control System) and other data acquisition systems.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a magnetoelectric integrated sensor. Background Art

[0002] The magnetoelectric vibration sensor is a sensor that uses the principle of electromagnetic induction to convert the input motion speed into an induced potential output. It can convert the mechanical energy of the object to be measured into an electrical signal that is easy to measure. In the prior art, the internal structure of the magnetoelectric vibration sensor includes a coil assembly, a magnetic steel, a spring and a magnetic conductive shell. The coil assembly is fixed in the magnetic conductive shell, and the magnetic steel is placed in the magnetic conductive shell. The upper end of the magnetic steel is connected to one end of a spring, and the other end of the spring is connected to the upper part of the magnetic conductive shell. The lower end of the magnetic steel is connected to one end of another spring, and the other end of the other spring is connected to the lower part of the magnetic conductive shell. A spring is connected to each of the upper and lower ends of the magnetic steel to form a second-order system. The defect of the above-mentioned magnetoelectric vibration sensor is that: due to cost constraints, the existing technology generally uses ordinary springs inside, and the life of the spring is limited. After a certain number of years, the performance will be reduced or even damaged; the existing products mostly use aluminum alloy shells and are fixed by screws, which is not a fully sealed method. This method is not very protective and has poor structural stability. In addition, the size of the existing technology products is generally large and the weight is also large.

[0003] In view of this, the utility model designs a magnetoelectric integrated sensor that overcomes the above-mentioned defects. Utility Model Content

[0004] The utility model aims to provide a magnetoelectric integrated sensor to achieve a small size and stable design of the sensor and improve the reliability of the product.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] A magnetoelectric integrated sensor, comprising a magnet, a coil, a high-performance spring, an upper shielding layer, a lower shielding layer, an adjustment circuit board, and a precision measurement circuit board;

[0007] The magnet is fixed on the lower shielding layer through the high-performance spring;

[0008] The coil is wound around the outside of the magnet through a coil bracket; both ends of the coil are connected to one end of a welding pin through a lead wire, and the welding pin is connected to the adjustment circuit board and the precision measurement circuit board;

[0009] The adjustment circuit board and the precision measurement circuit board are both enclosed in the upper shielding layer.

[0010] Preferably, the signal output terminal of the adjustment circuit board is connected to the signal input terminal of the precision measurement circuit board;

[0011] The precision measurement circuit board detects and converts the signal, outputs a 4-20mA standard current signal, and transmits it to a remote PLC and DCS data acquisition system.

[0012] Preferably, the coil is a double coil.

[0013] Preferably, the high performance spring is an alloy spring.

[0014] Preferably, the other end of the welding pin is connected to the aviation pin through a lead wire, and the aviation pin is fixed on the sensor housing by glass sintering.

[0015] Preferably, the aviation pin is gold-plated.

[0016] Preferably, the sensor housing is made of 304 or 316 stainless steel and connected to the aviation socket by laser welding.

[0017] Preferably, the sensor housing adopts a fully sealed design.

[0018] Preferably, the interior of the sensor is filled with glue.

[0019] The advantages and effects of this application are as follows:

[0020] (1) The present application designs a magnetoelectric integrated sensor with a simple structure, small size and good use effect. A precision measurement circuit board is added on the basis of the magnetoelectric speed sensor, so that the coordinated use of the precision measurement circuit board and the adjustment circuit can be achieved in a smaller size. When using the magnetoelectric integrated sensor, the adjustment circuit board transmits the measured signal to the precision measurement circuit board, and the precision measurement circuit board detects and converts the signal, converting the original vibration speed raw signal into a 4-20mA standard current signal, which can be directly transmitted to data acquisition systems such as PLC and DCS, meeting the use of different measurement rotating machinery.

[0021] (2) In the present application, the magnet is fixed to the shielding layer by a high-performance spring. The high-performance spring is designed with a special alloy material, which can ensure that the initial performance is maintained during long-term operation, thereby ensuring the reliability and service life of the product.

[0022] (3) The shielding layer designed in the present application not only has a shielding effect but also has a fixing function; the outer shell and interior of the magnetoelectric integrated sensor are fully sealed, and the interior is filled with glue to prevent the internal components from loosening and short circuiting, thereby further increasing protection.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings as follows.

[0024] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0026] Figure 1 A schematic diagram of the structure of a magnetoelectric integrated sensor provided by the utility model;

[0027] Figure numerals: 1. magnet; 2. coil; 21. coil bracket; 3. high-performance spring; 4. upper shielding layer; 5. lower shielding layer; 6. adjustment circuit board; 7. precision measurement circuit board; 8. lead wire; 9. welding pin; 10. aviation pin; 11. aviation socket; 12. glue filling layer. DETAILED DESCRIPTION

[0028] To make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all of the embodiments. In the following description, specific details such as specific configuration and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures is omitted in the embodiment.

[0029] It should be understood that the references to "one embodiment" or "this embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "one embodiment" or "this embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0030] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0031] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0032] The term "at least one" in this article is merely a description of the association relationship of associated objects, indicating that there may be three relationships. For example, at least one of A and B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0033] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0034] Example 1

[0035] This embodiment introduces the structure of a magneto-electric integrated sensor.

[0036] Combined with Figure 1 As shown, Figure 1 The present invention provides a schematic structural diagram of a magnetoelectric integrated sensor.

[0037] A magnetoelectric integrated sensor comprises a magnet 1, a coil 2, a high-performance spring 3, an upper shielding layer 4, a lower shielding layer 5, an adjustment circuit board 6, and a precision measurement circuit board 7; the magnet 1 is fixed to the lower shielding layer 4 through the high-performance spring 3; the coil 2 is wound around the outside of the magnet 1 through a coil support 21; both ends of the coil 2 are connected to one end of a welding needle 9 through a lead 8, and the welding needle 9 is connected to the adjustment circuit board 6 and the precision measurement circuit board 7; the adjustment circuit board 6 and the precision measurement circuit board 7 are both enclosed in the upper shielding layer 4.

[0038] Furthermore, the coil 2 is connected to the adjustment circuit board 6 through the lead 8. The adjustment circuit board 6 has the functions of distinguishing and processing the induction signal, improving the reliability of the model output, and adjusting the sensitivity of the sensor and the vibration response bandwidth of the sensor. The signal output end of the adjustment circuit board 6 is connected to the signal input end of the precision measurement circuit board 7; the precision measurement circuit board 7 detects and converts the signal, outputs a 4-20mA standard current signal, and can be transmitted to the remote PLC, DCS data acquisition system for later use; and can meet the use of different measurement rotating machinery.

[0039] In a preferred embodiment, the coil 2 is a double-coil design, which can provide a dual-path induction signal to improve signal reliability and enhance anti-interference performance.

[0040] Furthermore, the other end of the welding pin is connected to the aviation pin through a lead wire, and the aviation pin is fixed on the sensor housing through glass sintering. The sensor housing is connected to the aviation socket through laser welding.

[0041] The sensor is a magnetoelectric speed sensor with a precision measurement circuit board added. Its overall structure is simple and can achieve precision measurement in a small volume. When measuring rotating machinery, the circuit board converts the original vibration speed signal into a 4-20mA standard current signal for transmission. It is used to measure the bearing vibration (absolute vibration) of rotating machinery such as turbines, fans, and water pumps. The output standard 4-20mA current signal corresponding to the selected full-scale measurement range (such as 0-200um or 0-25mm / s) can be directly transmitted to PLC, DCS and other data acquisition systems.

[0042] Example 2

[0043] Based on Example 1, the magneto-electric integrated sensor involved in the present application is further described.

[0044] In the preferred embodiment, the spring used inside the magnetoelectric integrated sensor designed in the present application is a high-performance spring designed with special alloy materials. Compared with ordinary springs used in existing products, the high-performance spring can maintain the initial performance of the spring while meeting long-term working conditions, and the working life of the spring will not be reduced.

[0045] In a preferred embodiment, the aviation pin is gold-plated and has good anti-oxidation and wear resistance.

[0046] In the preferred embodiment, the sensor housing is made of 304 or 316 stainless steel, and the sensor housing adopts a fully sealed design, and the interior of the sensor is also filled with glue. Figure 1 The glue filling layer 12 is marked in the figure. The full sealing design of the sensor housing and the interior greatly improves the performance stability of the product. The internal glue filling layer 12 prevents the internal components from loosening and short circuiting, further improving the stability of the sensor during use.

[0047] The above description is only the preferred embodiment of the utility model, which does not limit the protection scope of the utility model. For those skilled in the art, the utility model can be modified and varied in various ways. Any changes, modifications, substitutions, integrations and parameter changes to these embodiments within the spirit and principle of the utility model through conventional substitutions or capable of achieving the same functions without departing from the principles and spirit of the utility model shall fall within the protection scope of the utility model.

Claims

1. A magnetoelectric integrated sensor, characterized in that: It comprises a magnet (1), a coil (2), a high-performance spring (3), an upper shielding layer (4), a lower shielding layer (5), an adjustment circuit board (6), and a precision measurement circuit board (7); The magnet (1) is fixed on the lower shielding layer (5) via the high-performance spring (3); The coil (2) is wound around the outside of the magnet (1) via a coil support (21); two ends of the coil (2) are connected to one end of a welding pin (9) via a lead wire (8), and the welding pin (9) is connected to the adjustment circuit board (6) and the precision measurement circuit board (7); The adjustment circuit board (6) and the precision measurement circuit board (7) are both enclosed in the upper shielding layer (4).

2. The magnetoelectric integrated sensor according to claim 1, characterized in that: The signal output end of the adjustment circuit board (6) is connected to the signal input end of the precision measurement circuit board (7); The precision measurement circuit board (7) detects and converts the signal, outputs a 4-20mA standard current signal, and transmits it to a remote PLC and DCS data acquisition system.

3. The magnetoelectric integrated sensor according to claim 1, characterized in that: The coil (2) is a double coil.

4. The magnetoelectric integrated sensor according to claim 1, 2 or 3, characterized in that: The high-performance spring (3) is an alloy spring.

5. The magnetoelectric integrated sensor according to claim 4, characterized in that: The other end of the welding needle (9) is connected to the aviation pin (10) through the lead wire (8), and the aviation pin (10) is fixed on the sensor housing by glass sintering.

6. The magnetoelectric integrated sensor according to claim 5, characterized in that: The aviation pin (10) is of gold-plated design.

7. The magnetoelectric integrated sensor according to claim 5, characterized in that: The sensor housing is made of 304 or 316 stainless steel and is connected to the aviation socket (11) by laser welding.

8. The magnetoelectric integrated sensor according to claim 7, characterized in that: The sensor housing adopts a fully sealed design.

9. The magnetoelectric integrated sensor according to claim 8, characterized in that: The interior of the sensor is filled with glue.

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