Linear displacement sensor with anti-interference function

Abstract

The utility model is suitable for the technical field of linear displacement sensors, and provides a linear displacement sensor with an anti-interference function, which comprises a sensor shell, a bottom plate assembly and an electric plate assembly, and is characterized in that the sensor shell is suitable for providing an installation environment; a plurality of groups of clamping grooves are formed in the outer side of the sensor shell in a surrounding manner; the bottom plate assembly is arranged at the top end of the sensor shell; the bottom plate assembly comprises a bottom plate shell, the bottom plate shell is matched with a sensor shell in shape, multiple sets of bottom plate buckles are arranged on the outer wall of the bottom plate shell in a surrounding mode, and the bottom plate shell is provided with a metal shielding layer. And the electric plate assembly is arranged between the sensor shell and the bottom plate assembly. The device solves the problem that the sensor body is interfered by an external metal interference source to cause inaccurate measurement data, and achieves the effects of improving the detection quality of the sensor and improving the magnetic interference resistance of the sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to linear displacement sensor technical field more specifically, it relates to a linear displacement sensor with anti -interference function. BACKGROUND

[0002] Linear displacement sensor as a kind of key equipment that can accurately convert linear mechanical displacement into electrical signal, taking automobile steering system as an example, the system needs to accurately measure 20cm-30cm displacement data, to accurately control the steering angle of car, ensure the stability and safety of vehicle driving.

[0003] With the rapid development of electric vehicle technology, the performance requirements of various sensors in the entire automobile industry are also rising. Compared with traditional fuel vehicles, the power system and electronic control system of electric vehicles are more complex, and higher requirements are put forward for the accuracy, reliability and response speed of sensors. Under such background, non-contact displacement sensor gradually occupies the mainstream position in the industrial field due to its advantages of no wear, long service life and high precision.

[0004] However, LC oscillation circuit is arranged on the circuit board inside the linear displacement sensor, and the circuit will generate high-frequency changing electric field. The electric field forms eddy current in the metal, thereby generating reverse electromotive force and additional electromotive force signal, which influences the original signal generated by the measured target, resulting in the decrease of measurement accuracy.

[0005] Therefore, a linear displacement sensor with anti-interference function is proposed to solve the problem that the sensor body is disturbed by external metal interference source, resulting in inaccurate measurement data. UTILITY MODEL CONTENT

[0006] In view of the deficiencies in the prior art, the utility model aims to provide a linear displacement sensor with anti-interference function, which improves sensor detection quality, improves sensor anti-magnetic interference ability and reduces production cost.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] A linear displacement sensor with anti-interference function, comprising a sensor shell, a bottom plate assembly and an electric plate assembly, the sensor shell is suitable for providing installation environment, a plurality of clamping grooves are arranged around the outer side of the sensor shell, the bottom plate assembly is arranged at the top end of the sensor shell, the bottom plate assembly comprises a bottom plate shell, the bottom plate shell is adaptively shaped with the sensor shell, a plurality of bottom plate buckles are arranged around the outer wall of the bottom plate shell, the bottom plate shell has a metal shielding layer, and the electric plate assembly is arranged between the sensor shell and the bottom plate assembly.

[0009] The utility model further sets up: the plurality of groups of bottom plate buckle of outside wall setting and the shape of the clamping groove of sensor shell are adapted, the metal shielding layer and bottom plate shell shape are adapted.

[0010] Through adopting above-mentioned technical scheme, bottom plate shell provides dustproof environment for electric plate assembly, through bottom plate buckle set on bottom plate shell outer wall, can cooperate with the clamping groove of sensor shell, realizes quick installation, improves installation efficiency, through the gap of about 10mm between metal shielding layer and electric plate assembly, avoids too weak signal triggering chip diagnosis, metal shielding layer can effectively isolate magnetic interference in outside environment, improves the anti -interference ability of electric plate assembly, reduces the influence of magnetic interference on sensor measurement and calculation, improves the working quality of sensor.

[0011] The utility model further sets up: the electric plate assembly includes circuit board, the circuit board sets up in sensor shell inside, a plurality of groups of electronic components are provided on the circuit board surface.

[0012] The utility model further sets up: the circuit board one side is provided with positioning column.

[0013] Summarized above, the present application includes following at least one beneficial technical effect:

[0014] 1, through bottom plate shell, bottom plate buckle provides dustproof environment for electric plate assembly, realizes quick installation, improves installation efficiency, through the gap of about 10mm between metal shielding layer and electric plate assembly, avoids too weak signal triggering chip diagnosis, metal shielding layer can effectively isolate magnetic interference in outside environment, reduces the influence of magnetic interference on sensor measurement and calculation, improves the working quality of sensor.

[0015] 2, through setting the parameter of sensor inside, after determining fixed interference source, calibrates interference source, and writes the parameter of calibration into sensor inside, realizes anti -magnetic interference. DRAWINGS

[0016] Figure 1 It is the structure diagram of linear displacement sensor with anti -interference function of the utility model.

[0017] Figure 2 It is the internal structure diagram of the utility model.

[0018] Figure 3 It is the explosion diagram of bottom plate assembly in the utility model.

[0019] Figure 4 It is Figure 2A local enlarged view of the middle A region.

[0020] Figure 5 For Figure 2 A local enlarged view of the middle B region.

[0021] Reference signs: 1, sensor shell;

[0022] 2, bottom plate assembly; 21, bottom plate shell; 22, bottom plate buckle; 23, metal shielding layer;

[0023] 3, electric plate assembly; 31, circuit board; 32, electronic element; 33, positioning column. DETAILED DESCRIPTION

[0024] 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. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0026] Embodiment one, please refer to Figures 1-5 The present application provides the following technical solutions:

[0027] Specifically refers to a linear displacement sensor with anti-interference function, please refer to Figures 1-2 , including sensor shell 1, bottom plate assembly 2, electric plate assembly 3, sensor shell 1 is suitable for providing installation environment; a plurality of clamping grooves are formed around the outer side of sensor shell 1; the bottom plate assembly 2 is arranged at the top end of the sensor shell 1, the bottom plate assembly 2 cooperates with the sensor shell 1 to protect the internal circuit, avoid dust and impurities into the internal damage electronic elements, at the same time provide magnetic shielding; the electric plate assembly 3 is arranged between the sensor shell 1 and the bottom plate assembly 2, the sensor is provided with circuit basis through the electric plate assembly 3, realizes the linear displacement measurement function.

[0028] Please refer to Figure 3 , the bottom plate assembly 2 includes bottom plate shell 21, the bottom plate shell 21 is shape adapted to the sensor shell 1, a plurality of bottom plate buckles 22 are arranged around the outer wall of the bottom plate shell 21, the bottom plate shell 21 has a metal shielding layer 23, the metal shielding layer 23 can be installed inside the bottom plate shell 21 or outside; the plurality of bottom plate buckles 22 arranged on the outer wall are shape adapted to the clamping grooves of the sensor shell 1, and the metal shielding layer 23 is shape adapted to the bottom plate shell 21.

[0029] Please refer to Figures 4-5The electric plate assembly 3 comprises a circuit board 31 arranged inside the sensor shell 1, and a plurality of electronic elements 32 are arranged on the surface of the circuit board 31.

[0030] Specifically, the bottom plate shell 21 provides a dustproof environment for the electric plate assembly 3, the bottom plate buckle 22 arranged on the outer wall of the bottom plate shell 21 can be matched with the clamping groove of the sensor shell 1 to realize quick installation and improve the installation efficiency, the circuit board 31 and the electronic elements 32 are matched to realize the detection and calculation functions of the sensor, the metal shielding layer 23 keeps a gap of about 10mm with the electric plate assembly 3 to avoid triggering the chip diagnosis due to too weak signal, because the electronic elements 32 on the circuit board 31 can generate a high-frequency changing electric field, the external metal can generate eddy current by sensing the electric field, thereby generating a reverse electromotive force and an additional electromotive force signal, which can affect the original signal generated by the measured target, thereby reducing the measurement accuracy, the metal shielding layer 23 can effectively isolate the magnetic interference in the external environment, improve the anti-interference ability of the electric plate assembly 3, reduce the influence of magnetic interference on the measurement and calculation of the sensor, and improve the working quality of the sensor. On the other hand, by setting the parameters inside the sensor, the interference source is calibrated after being determined, and the calibrated parameters are written into the sensor to realize the anti-magnetic interference.

[0031] Obviously, the above-described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

Claims

1. A linear displacement sensor having an anti-interference function, characterized by: Including sensor shell (1), bottom plate assembly (2), electric plate assembly (3), the sensor shell (1) is suitable for providing installation environment; The outside of the sensor shell (1) is surrounded by a plurality of clamping grooves; The bottom plate assembly (2) is arranged at the top end of the sensor shell (1); The bottom plate assembly (2) includes a bottom plate shell (21), the bottom plate shell (21) is matched with the shape of the sensor shell (1), a plurality of bottom plate buckles (22) are arranged on the outer wall of the bottom plate shell (21), and the bottom plate shell (21) has a metal shielding layer (23); The electric plate assembly (3) is arranged between the sensor shell (1) and the bottom plate assembly (2).

2. The linear displacement sensor with anti-interference function according to claim 1, characterized in that: The plurality of bottom plate buckles (22) arranged on the outer wall are matched with the shape of the clamping groove of the sensor shell (1), and the metal shielding layer (23) is matched with the shape of the bottom plate shell (21).

3. The linear displacement sensor with anti-interference function according to claim 1, characterized in that: The electric plate assembly (3) includes a circuit board (31), the circuit board (31) is arranged inside the sensor shell (1), and a plurality of electronic elements (32) are arranged on the surface of the circuit board (31).

4. The linear displacement sensor with anti-interference function according to claim 3, characterized in that: A positioning column (33) is arranged on one side of the circuit board (31).

Images