Sensor

Abstract

The utility model discloses a sensor. The sensor comprises a sensor main body; the sensing module is arranged in the sensor main body; and the heat-resistant coating coats at least one part of the sensor main body. According to the utility model, the problems of low production efficiency and poor heat dissipation performance of the current sensor can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile, especially a kind of sensor. BACKGROUND

[0002] With the development of automobile technology, the safety problem of automobile is also paid more and more attention. Sensor has a crucial role in the safety system of automobile. Taking wheel speed sensor as an example, in vehicle anti-lock system, wheel speed sensor is used to monitor wheel speed in real time, and anti-lock system adjusts brake pressure according to wheel speed to avoid wheel lock during braking.

[0003] Wheel speed sensor is usually installed near brake caliper of vehicle (such as hub position) to monitor wheel speed, however, when vehicle drives for a long time, the temperature around brake caliper is very high, and the sensor body of wheel speed sensor is usually injection molded body, which has poor heat resistance, so that the sensor body of wheel speed sensor is easily damaged due to high temperature, resulting in failure of wheel speed sensor and causing safety accident.

[0004] Currently, heat-resistant metal shell is additionally installed outside the sensor body of sensor such as wheel speed sensor which has high temperature resistance requirement, to improve the heat resistance of sensor. However, on the one hand, the equipment cost for producing and installing metal shell is high, resulting in high cost of the scheme of installing metal shell outside the sensor body of sensor. Moreover, in the production process of sensor, metal shell needs to be manufactured first, and then installed on sensor, which occupies two production cycles, resulting in greatly reduced production efficiency of sensor and poor economy. On the other hand, metal shell is usually closed type, which wraps sensor, which is not conducive to heat dissipation of sensor, and unstable output signal of sensor is easily caused due to insufficient heat dissipation. For example, unstable output signal of wheel speed sensor will cause abnormality of anti-lock system, and vehicle cannot perform emergency braking, resulting in traffic accident. At the same time, metal material itself also affects the output signal of sensor. SUMMARY

[0005] The utility model aims at solving the problem of low production efficiency and poor heat dissipation performance of current sensor. The utility model provides a kind of sensor, which can effectively improve the production efficiency of sensor and improve heat dissipation performance.

[0006] To solve the above technical problems, the embodiment of the utility model discloses a kind of sensor, comprising:

[0007] Sensor body;

[0008] Induction module, in the sensor body;

[0009] A heat-resistant coating is coated on at least a portion of the sensor body.

[0010] According to the technical scheme, the heat-resistant coating is coated on a portion of the sensor body to improve the heat resistance of the sensor body and avoid the melting of the injection molding material of the sensor due to high temperature, which leads to the failure of the sensor. In other words, the heat-resistant coating is coated on the sensor body to replace the metal shell in the prior art. The heat-resistant coating can improve the heat dissipation performance of the sensor while ensuring the heat resistance of the sensor body. In addition, compared with the metal shell, the heat-resistant coating has a smaller volume, which reduces the volume of the sensor and is conducive to the development of product miniaturization and can better adapt to limited installation environments.

[0011] In addition, during production, the worker only needs to coat the liquid heat-resistant coating material on the injection molding material portion of the sensor body. Compared with the two steps of "manufacturing" and "installation" of the metal shell, the processing method using the heat-resistant coating only needs one step of spraying, which occupies less production cycle and is conducive to improving the production efficiency of the sensor. In addition, the coating of the heat-resistant coating does not require the use of large-scale tooling equipment, which saves equipment costs and improves economic efficiency.

[0012] According to one specific embodiment of the present application, the sensor body comprises:

[0013] The sensing portion is located at one end of the sensor body, the sensing module is arranged in the sensing portion, and the heat-resistant coating coats the sensing portion.

[0014] According to one specific embodiment of the present application, the sensor body comprises: a mounting portion, the heat-resistant coating coats the mounting portion, and the mounting portion is arranged on the sensor body and is used for fixing the sensor to an external structure.

[0015] According to one specific embodiment of the present application, the sensor body further comprises:

[0016] The sensor connecting portion is in communication with the sensing portion, the sensor connecting portion and the sensing portion are located on opposite sides of the mounting portion, respectively, and the heat-resistant coating coats the sensor connecting portion.

[0017] The electronic connecting piece is accommodated in the sensor connecting portion, one end of the electronic connecting piece is connected to the sensing module, and the other end is used for electrically connecting with an external electronic device.

[0018] According to one specific embodiment of the present application, one end of the sensor connecting portion away from the sensing portion is provided with a wire, and the wire is used for electrically connecting the electronic connecting piece with the external electronic device.

[0019] According to one specific embodiment of the present application, the sensor connecting part is an electrical connector at one end away from the sensing part, the other end of the electronic connecting part is connected to the electrical connector, and the electrical connector is used to electrically connect with external electronic devices.

[0020] According to one specific embodiment of the present application, the material of the heat-resistant coating is graphene or a composite material including graphene.

[0021] Graphene has excellent heat conduction properties, fast heat dissipation properties, light weight, flexibility, corrosion resistance, and other properties. Coating graphene or a composite material including graphene on the sensor body can effectively improve the heat resistance and corrosion resistance of the sensor. Moreover, compared with metal shells, the material cost of graphene is lower, which effectively reduces the production cost of the sensor.

[0022] Meanwhile, after being coated on the sensor body, graphene forms a graphene heat dissipation film, which has better heat dissipation performance and can effectively avoid the instability of the output signal caused by insufficient and untimely heat dissipation of the sensor, leading to traffic accidents caused by abnormal safety systems. Moreover, the graphene material itself does not affect the signal.

[0023] According to one specific embodiment of the present application, the material of the heat-resistant coating includes silicon carbide.

[0024] According to one specific embodiment of the present application, the material of the heat-resistant coating includes boron nitride.

[0025] According to one specific embodiment of the present application, the material of the heat-resistant coating includes silicon phosphide. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A front view of a sensor according to an embodiment of the present application is shown;

[0027] Figure 2 A front view of a sensor according to another embodiment of the present application is shown.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 100. Sensor;

[0030] 110. Sensor body, 111. Sensing part, 112. Mounting part, 113. Sensor connecting part, 114. Wire, 115. Electrical connector;

[0031] 120. Heat-resistant coating. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present application with specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Although the description of the present application will be introduced in combination with the preferred embodiments, it does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0033] It should be noted that in the present specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] The terms "first", "second", and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present embodiment, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail in combination with the drawings.

[0038] Reference Figure 1The sensor 100 provided by the embodiment of the present application is a wheel speed sensor, but is not limited thereto. It can be understood that the present application is applicable to any sensor with high-temperature resistance requirements, such as a displacement sensor, a force sensor, and the like.

[0039] The sensor 100 comprises a sensor body 110 and a heat-resistant coating 120, wherein the inside of the sensor body 110 is provided with a sensing module (not shown in the figure), which is used to monitor the rotation speed of the wheel in real time, so that the anti-lock braking system adjusts the brake pressure according to the rotation speed of the wheel.

[0040] Exemplarily, the heat-resistant coating 120 covers at least part of the sensor body 110. Specifically, the heat-resistant coating 120 covers the part of the sensor body 110 made of injection molding material, so as to improve the heat resistance of the part of the sensor body 110 made of injection molding material, and avoid the part of the sensor body 110 made of injection molding material from melting due to high temperature, which leads to failure of the sensor 100 and causes a safety accident. In other words, the heat-resistant coating 120 is coated on the outside of the sensor body 110 to replace the “metal shell” in the prior art, which can effectively improve the heat dissipation performance of the sensor 100 while ensuring the heat resistance of the sensor body 110. Moreover, compared with the “metal shell”, the heat-resistant coating 120 has a smaller volume, which reduces the volume of the sensor 100 and is conducive to the development of product miniaturization and can better adapt to limited installation environments.

[0041] The embodiment of the present application does not make specific limitations on the part of the sensor body 110 covered by the heat-resistant coating 120. Exemplarily, in other possible embodiments, the heat-resistant coating 120 covers the entire sensor body 110.

[0042] Exemplarily, in the embodiment of the present application, the heat-resistant coating 120 is coated on the part of the sensor body 110 made of injection molding material by spraying. However, it is not limited thereto. In other possible embodiments, the heat-resistant coating 120 can be coated on the part of the sensor body 110 made of injection molding material by hand coating.

[0043] During production, the staff only needs to coat the liquid heat-resistant coating 120 material on the part of the sensor body 110 made of injection molding material, so that the heat-resistant coating 120 covers the part of the sensor body 110 made of injection molding material. Compared with the two steps of “manufacturing” and “installation” of the metal shell, the processing method using the heat-resistant coating 120 only needs one step of “spraying”, which occupies less production cycle and is conducive to improving the production efficiency of the sensor 100. Moreover, coating the heat-resistant coating 120 does not require the use of large-scale tooling equipment, which saves equipment costs and improves economic efficiency.

[0044] Preferably, in the embodiments of the present application, the material of the heat-resistant coating layer 120 is graphene, which has excellent heat conduction characteristics, rapid heat dissipation characteristics, and lightweight, flexible, corrosion-resistant characteristics. Coating graphene on the injection molding material part of the sensor body 110 can effectively improve the heat resistance and corrosion resistance of the sensor 100. Moreover, compared with metal shells, the material cost of graphene is lower, which further reduces the production cost of the sensor 100.

[0045] At the same time, after being coated on the sensor body 110, the graphene forms a graphene heat dissipation film, which has better heat dissipation performance and can effectively avoid the instability of the output signal of the sensor 100 due to insufficient and untimely heat dissipation, leading to the risk of traffic accidents caused by the abnormality of the anti-lock braking system and the inability of the vehicle to perform emergency braking.

[0046] For the specific material of the heat-resistant coating layer 120, the present application does not make any limitation. For example, in other possible embodiments, the material of the heat-resistant coating layer 120 can be a composite material including graphene, or a material such as silicon carbide, boron nitride, or silicon phosphide that can effectively improve the heat resistance of the sensor 100.

[0047] Exemplarily, the sensor body 110 includes a sensing part 111, a mounting part 112, a sensor connecting part 113, an electronic connecting piece (not shown in the figure), and a connecting part (not shown in the figure). Among them, the electronic connecting piece is, for example, a connecting piece such as a wire or a pin for connecting electronic devices. For the sake of description, the electronic connecting piece is taken as an example of a wire in the following description. The connecting part is, for example, a component such as a skeleton. The connecting part is used to support and fix the sensing module and the electronic connecting piece.

[0048] Specifically, the mounting part 112 is connected with the sensing part 111, and the sensor connecting part 113 is connected with the mounting part 112. The sensing module and the connecting part are arranged in the sensing part 111. The mounting part 112 is used to fix the sensor 100 to an external structure (not shown in the figure), such as a hub near a brake caliper. The wire is used to electrically connect the sensing module with external electronic devices. The sensor connecting part 113 contains the wire.

[0049] Exemplarily, along the length direction X of the sensor 100, the sensor connecting part 113 and the sensing part 111 are located on opposite sides of the mounting part 112, respectively. Moreover, the sensor connecting part 113 and the sensing part 111 are in electrical connection, so that one end of the wire is connected to the sensing module, and the other end is used to electrically connect with external electronic devices (not shown in the figure) through the sensor connecting part 130.

[0050] Exemplarily, in the embodiments of the present application, the sensing portion 111, the mounting portion 112 and the sensor connecting portion 113 are integrally injection molded, that is, the sensing portion 111, the mounting portion 112 and the sensor connecting portion 113 are all injection molded material parts of the sensor main body 110. That is, in the embodiments of the present application, the heat-resistant coating 120 covers the sensing portion 111, the mounting portion 112 and the sensor connecting portion 113.

[0051] The present application does not limit the specific forming manner of the sensing portion 111, the mounting portion 112 and the sensor connecting portion 113. For example, in other possible embodiments, the sensing portion 111, the mounting portion 112 and the sensor connecting portion 113 are three different components that are assembled together.

[0052] The present application does not limit the specific material of the sensing portion 111, the mounting portion 112 and the sensor connecting portion 113. In other possible embodiments, one or two of the sensing portion 111, the mounting portion 112 and the sensor connecting portion 113 are injection molded materials, and the rest are metal materials or other types of materials.

[0053] Exemplarily, the mounting portion 112 is fixed with an external structure by a fixing member such as a bolt.

[0054] Exemplarily, continuing to refer to Figure 1 , along the length direction X of the sensor 100, the end of the sensor connecting portion 113 away from the sensing portion 111 is provided with a wire 114, the wire 114 is connected with the electronic connecting member and extends out of the sensor connecting portion 113, and is used for electrically connecting the electronic connecting member with an external electronic device.

[0055] In another possible embodiment, referring to Figure 2 , along the length direction of the sensor, the end of the sensor connecting portion 113 away from the sensing portion 111 is an electrical connector 115, the other end of the wire is connected to the electrical connector 115, and the electrical connector 115 is used for electrically connecting with an external electronic device. Exemplarily, in some possible embodiments, the electrical connector 115 is a plug-in connector, that is, the sensor 100 is a plug-in sensor.

[0056] Although the present application has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood by those skilled in the art that the foregoing is a description of the application in further detail and is not intended to limit the application to the specific embodiments described. Various changes and modifications can be made to the application in form and detail by those skilled in the art, including making several simple deductions or substitutions, without departing from the spirit and scope of the application.

Claims

1. A sensor, characterized by The sensor comprises: a sensor body; a sensing module arranged in the sensor body; a heat-resistant coating layer covering at least a portion of the sensor body; a sensing portion arranged at one end of the sensor body, the sensing module being arranged in the sensing portion, and the heat-resistant coating layer covering the sensing portion.

2. The sensor of claim 1, wherein, The sensor body comprises: a mounting portion covered by the heat-resistant coating layer, the mounting portion being arranged on the sensor body and used for fixing the sensor to an external structure.

3. The sensor of claim 2, wherein, The sensor body further comprises: a sensor connecting portion in communication with the sensing portion, the sensor connecting portion being arranged on the opposite side of the mounting portion from the sensing portion, and the heat-resistant coating layer covering the sensor connecting portion; an electronic connecting member accommodated in the sensor connecting portion, one end of the electronic connecting member being connected to the sensing module, and the other end of the electronic connecting member being used for electrically connecting to an external electronic device.

4. The sensor of claim 3, wherein, A wire is arranged at the end of the sensor connecting portion away from the sensing portion, and the wire is used for electrically connecting the electronic connecting member to the external electronic device.

5. The sensor of claim 3, wherein, The end of the sensor connecting portion away from the sensing portion is an electrical connector, the other end of the electronic connecting member is connected to the electrical connector, and the electrical connector is used for electrically connecting to the external electronic device.

6. The sensor of claim 1, wherein, The material of the heat-resistant coating layer is graphene or a composite material comprising graphene.

7. The sensor of claim 1, wherein, The material of the heat-resistant coating layer comprises silicon carbide.

8. The sensor of claim 1, wherein, The material of the heat-resistant coating layer comprises boron nitride.

9. The sensor of claim 1, wherein, The material of the heat-resistant coating layer comprises silicon phosphide.

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