Magnetoelectric speed sensor

Abstract

The utility model provides a magnetoelectric speed sensor, which is provided with a shell, the top of the shell is connected with an aviation socket, and the bottom of the shell is provided with a mounting hole; a magnet is arranged in the shell, the upper part of the magnet is fixed on a shielding layer through a high-performance spring, and the shielding layer is connected with an adjusting circuit board through a welding pin; a coil bracket is arranged outside the magnet, and a double-layer coil is wound outside the coil bracket; two ends of the top of the coil support are connected with welding needle bottom ends through leads; an aviation pin is arranged in the aviation socket, and the bottom end of the aviation pin is connected with the top end of the welding pin through a lead. According to the magnetoelectric speed sensor, the TC4 titanium alloy spring is adopted, so that the size and the weight of a product can be effectively reduced, and meanwhile, the service life of the product is prolonged. In addition, the signal reliability is effectively improved through the design of the double-layer coil, and the overall structural stability is effectively improved through the design that the full-sealed shell is combined with internal cavity grouting treatment.

Description

Technical Field

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

[0002] The magnetoelectric velocity sensor is a conventional sensor used in seismic exploration and engineering measurement. It converts ground vibration into an electrical signal proportional to the vibration velocity and is a device that converts mechanical energy into electrical energy.

[0003] The spring materials used in existing magnetoelectric speed sensors are generally ordinary spring steel, mainly stainless steel, copper alloy and other materials, which are generally dense and not corrosion-resistant, which will affect the long-term performance of the product. When the sensor works for a long time, the fatigue life will be reduced.

[0004] For example, the prior art CN111896767A discloses a dual-path magnetoelectric speed sensor, in which the coil skeleton and the magnetic steel are connected by ordinary spring sheets and magnetic targets, and the public text does not optimize or upgrade the materials of the connection components. It can be expected that the sensor designed in this application may have unstable connection performance after long-term use, resulting in a short service life of the entire sensor.

[0005] Therefore, how to design a magnetoelectric speed sensor with long-term stable performance and long service life has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] In order to solve the technical problem that the fatigue life of the existing magnetoelectric speed sensor will be reduced after long-term operation, the present application provides the following technical solutions:

[0007] A magnetoelectric speed sensor is provided with a shell, the top of the shell is connected with an aviation socket, and the bottom is provided with a mounting hole; a magnet is provided in the shell, the upper part of the magnet is fixed on a shielding layer through a high-performance spring, and the shielding layer is connected to an adjustment circuit board through a welding pin; a coil bracket is provided outside the magnet, and a double-layer coil is wound outside the coil bracket; the two ends of the top of the coil bracket are connected to the bottom of the welding pin through a lead wire; an aviation pin is provided in the aviation socket, and the bottom of the aviation pin is connected to the top of the welding pin through a lead wire; the high-performance spring adopts a TC4 titanium alloy spring.

[0008] Preferably, the aviation pins are gold-plated.

[0009] Preferably, the aviation pin is fixed on the housing by glass sintering.

[0010] Preferably, the housing and the aviation socket are laser welded to adopt a fully sealed design.

[0011] Preferably, the cavity formed inside the shell is integrally potted by glue pouring.

[0012] Preferably, the shell is made of 304 stainless steel or 316 stainless steel.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The magnetoelectric speed sensor provided by the utility model adopts TC4 titanium alloy spring, which can effectively reduce the volume and weight of the product while increasing the service life of the product, and can maintain the initial performance even after working for a long time.

[0015] 2. The magnetoelectric speed sensor provided by the utility model adopts a double-layer coil design, which can provide a dual-path sensing signal to improve the reliability of the signal and enhance the anti-interference performance.

[0016] 3. The magnetoelectric speed sensor provided by the utility model adopts a fully sealed stainless steel shell combined with an internal cavity grouting treatment, which can effectively enhance the internal airtightness and improve the overall structural stability.

[0017] 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.

[0018] 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

[0019] 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.

[0020] Figure 1 A cross-sectional view of the structure of a magnetoelectric speed sensor provided by the utility model;

[0021] In the figure: 1. Shell; 2. Aviation socket; 3. Mounting hole; 4. Magnet; 5. High-performance spring; 6. Shielding layer; 7. Welding pin; 8. Adjustment circuit board; 9. Coil bracket; 10. Double-layer coil; 11. Lead wire; 12. Aviation pin; 13. Cavity. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Example 1

[0029] This embodiment introduces the structural composition of a magnetoelectric speed sensor.

[0030] Please refer to Figure 1 , Figure 1 The present invention is a cross-sectional view of the structure of a magnetoelectric speed sensor provided by the present invention.

[0031] The magnetoelectric speed sensor is provided with a housing 1, the top of which is connected to an aviation socket 2, and the bottom of which is provided with a mounting hole 3;

[0032] The housing 1 is provided with a magnet 4, the upper part of which is fixed on a shielding layer 6 via a high-performance spring 5, and the shielding layer 6 is connected to an adjustment circuit board 8 via a welding pin 7;

[0033] The magnet 4 is provided with a coil support 9, and a double-layer coil 10 is wound around the coil support 9; the top two ends of the coil support 9 are connected to the bottom end of the welding needle 7 through lead wires 11;

[0034] The aviation socket 2 is provided with an aviation pin 12, which is fixed on the housing 1 by glass sintering, and the bottom end of the aviation pin 12 is connected to the top end of the welding pin 7 through a lead wire 11;

[0035] Furthermore, the high-performance spring 5 adopts TC4 titanium alloy spring. Titanium alloy has the characteristics of small size, light weight, corrosion resistance, fatigue resistance, etc. Compared with ordinary steel springs, its density and elastic modulus are only half of those of steel springs, while its strength is almost the same as that of steel springs. The use of TC4 titanium alloy spring in this application can effectively reduce the volume and weight of the product while increasing the service life of the product, and can maintain the initial performance even after long-term operation.

[0036] Furthermore, the present application adopts a double-layer coil 10 design, which can provide a dual-path sensing signal to improve the reliability of the signal and enhance the anti-interference ability.

[0037] Furthermore, the adjustment circuit board 8 has the functions of distinguishing and processing the sensing signal, improving the reliability of the model output, and adjusting the sensitivity of the sensor and the vibration response bandwidth of the sensor.

[0038] Furthermore, the aviation pin 12 is gold-plated and has good anti-oxidation and wear resistance.

[0039] Furthermore, the housing 1 is made of 304 or 316 stainless steel, and is laser welded with the aviation socket 2 to adopt a fully sealed design; at the same time, the cavity 13 formed inside the housing 1 is integrally sealed in the form of glue injection, which can effectively prevent the internal components from loosening and short-circuiting, thereby strengthening the internal airtightness and improving the structural stability. The present application adopts a combination of internal and external sealing to effectively improve the stability of the product.

[0040] 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 speed sensor, characterized in that: The invention discloses a housing (1), wherein the top of the housing (1) is connected to an aviation socket (2), and the bottom is provided with a mounting hole (3); a magnet (4) is arranged inside the housing (1), the upper part of the magnet (4) is fixed to a shielding layer (6) through a high-performance spring (5), and the shielding layer (6) is connected to an adjustment circuit board (8) through a welding pin (7); a coil support (9) is arranged outside the magnet (4), and a double-layer coil (10) is wound around the coil support (9); the top two ends of the coil support (9) are connected to the bottom end of the welding pin (7) through a lead wire (11); an aviation plug pin (12) is arranged in the aviation socket (2), and the bottom end of the aviation plug pin (12) is connected to the top end of the welding pin (7) through a lead wire (11); the high-performance spring (5) is made of a TC4 titanium alloy spring.

2. A magnetoelectric speed sensor according to claim 1, characterized in that: The aviation pin (12) is designed to be gold-plated.

3. A magnetoelectric speed sensor according to claim 1 or 2, characterized in that: The aviation pin (12) is fixed on the housing (1) by glass sintering.

4. A magnetoelectric speed sensor according to claim 3, characterized in that: The housing (1) and the aviation socket (2) are welded by laser and adopt a fully sealed design.

5. A magnetoelectric speed sensor according to claim 4, characterized in that: The cavity (13) formed inside the housing (1) is integrally potted by means of glue potting.

6. A magnetoelectric speed sensor according to claim 5, characterized in that: The material of the housing (1) is 304 stainless steel or 316 stainless steel.

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