Signal interference shielding structure of photoelectric sensor

Abstract

The utility model discloses a signal interference shielding structure of a photoelectric sensor, which relates to the technical field of photoelectric sensors and comprises a connector. A connecting wire is arranged on the surface of the rear end of the connector, a photoelectric sensor body is arranged in the middle of the surface of the front end of the connector, a protective shell is arranged on the surface of the front end of the connector, Faraday cage patterns are arranged on the outer surface of the protective shell, and the Faraday cage patterns are grid patterns. The photoelectric sensor signal interference shielding structure comprises a protective shell, a grounding plate is arranged on the outer surface of the lower end of the protective shell, the grounding plate is arranged to be in an L shape, and a metal shielding layer is arranged on the inner surface of the protective shell and composed of copper foil. By arranging the Faraday cage pattern on the outer surface of the protective shell and arranging the metal shielding layer on the inner surface of the protective shell, external electromagnetic signals can be effectively shielded through two layers of protection, and interference of the electromagnetic signals on the photoelectric sensor body is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to photoelectric sensor technical field, concretely is a kind of photoelectric sensor signal interference shielding structure. BACKGROUND

[0002] Industrial control field, detection field is forced by higher efficiency pursuit, the requirement of sensor also increases day by day. Traditional sensor shows various kinds of shortcomings to high temperature, high pressure, strong interference, narrow space and other harsh environments, photoelectric sensor is vulnerable to external signal interference during working process, and therefore needs to be anti-interference protection.

[0003] As the patent document with application No.202020121623.5 discloses a kind of photoelectric sensor, the utility model provides a kind of photoelectric sensor, its characterized in that, including: shell, it defines a containing space, the outer circumferential surface of the shell is provided with screw thread;Circuit board, it is set in the containing space of the shell;Cable, it is electrically connected with the circuit board;Adjustable potentiometer, it has an adjustment part;And knob, the knob is threaded through the wall of the shell, and the end of the knob has a connecting part, the connecting part is matched with the adjustment part, but the photoelectric sensor in the factory environment of industrial automation, when a large number of motor, frequency converter and other equipment environment work, if signal shielding is not done well, electromagnetic interference and radio frequency interference generated by equipment can interfere with photoelectric sensor, affect the normal use of photoelectric sensor.

[0004] Therefore, in view of the above, the existing structure is improved, and a photoelectric sensor signal interference shielding structure is provided. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of photoelectric sensor signal interference shielding structure to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of photoelectric sensor signal interference shielding structure, including connector, the rear end surface of the connector is provided with connecting line, and the front end surface of connector is provided with photoelectric sensor main body in middle part, and the front end surface of connector is provided with protective shell, the outer surface of the protective shell is provided with faraday cage thread, and faraday cage thread is provided as grid thread, the lower end outer surface of the protective shell is provided with grounding plate, and grounding plate is provided as L-shaped, the inner surface of the protective shell is provided with metal shielding layer, and metal shielding layer is composed of copper foil.

[0007] Preferably, the lower end outer surface of the protective shell is provided with screw groove one, and the outer surface of screw groove one is spirally installed with connecting sleeve.

[0008] Preferably, the outer surface of the connecting head is provided with two screw grooves, and the connecting head and the protective shell are fixedly connected through the connecting sleeve.

[0009] Preferably, the middle part of the front end surface of the connecting head is provided with a positioning ring, and the outer surface of the positioning ring is provided with a positioning groove.

[0010] Preferably, the inner surface of the positioning groove is provided with a sealing gasket, and the front end surface of the positioning ring is provided with a clamping groove.

[0011] Preferably, the inner surface of the sealing gasket is mounted with a desiccant bag, and the desiccant bag is composed of montmorillonite powder.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. The utility model discloses a connecting head, a connecting line, a photoelectric sensor main body, a protective shell, a faraday cage, a grounding plate, a metal shielding layer and a screw groove one are arranged, the outer surface of the protective shell is provided with the faraday cage, and the inner surface of the protective shell is provided with the metal shielding layer, two layers of protection can effectively shield external electromagnetic signals, and interference of electromagnetic signals on the photoelectric sensor main body is avoided, the grounding plate is arranged, and induced current on the shell can be led out through the grounding plate to protect the photoelectric sensor main body.

[0014] 2. The utility model discloses a screw groove two, a connecting sleeve, a positioning ring, a positioning groove, a sealing gasket, a clamping groove and a desiccant bag are arranged, the connecting sleeve is arranged, and the connecting head and the protective shell can be connected and removed conveniently, the sealing gasket is arranged, the connecting tightness of the connecting head and the protective shell can be improved, and water vapor is prevented from entering the inside of the photoelectric sensor main body, the desiccant bag is arranged, water vapor that seeps from the connecting place of the connecting head and the protective shell is absorbed, and the dryness of the inside of the protective shell is ensured. DRAWINGS

[0015] Figure 1 It is the whole three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is the anti-interference structure schematic diagram of the utility model;

[0017] Figure 3 It is the connecting sleeve structure schematic diagram of the utility model;

[0018] Figure 4 It is the sealing structure schematic diagram of the utility model.

[0019] In the figure: 1, connecting head; 101, connecting line; 102, photoelectric sensor body; 2, protective shell; 201, Faraday cage; 202, grounding plate; 203, metal shielding layer; 204, threaded groove one; 3, threaded groove two; 301, connecting sleeve; 4, positioning ring; 401, positioning groove; 402, sealing gasket; 403, clamping groove; 404, desiccant package. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] As shown in the figure, a photoelectric sensor signal interference shielding structure, including connecting head 1, the rear end surface of connecting head 1 is provided with connecting line 101, and the middle part of the front end surface of connecting head 1 is provided with photoelectric sensor body 102, and the front end surface of connecting head 1 is provided with protective shell 2, the advantages of this setting are that through the setting of protective shell 2, the photoelectric sensor body 102 can be protected, and the signal can be interfered and shielded at the same time. Figures 1-2 Further, the outer surface of protective shell 2 is provided with Faraday cage 201, and Faraday cage 201 is provided as a grid pattern, the advantages of this setting are that by setting Faraday cage 201 on the outer surface of protective shell 2 and metal shielding layer 203 on the inner surface of protective shell 2, two layers of protection can effectively shield external electromagnetic signals and avoid interference of electromagnetic signals on photoelectric sensor body 102.

[0022] Further, the lower end outer surface of protective shell 2 is provided with grounding plate 202, and grounding plate 202 is provided as L-shaped, the inner surface of protective shell 2 is provided with metal shielding layer 203, and metal shielding layer 203 is composed of copper foil, the advantages of this setting are that by setting grounding plate 202, the induced current of external interference signals on the shell can be led out through grounding plate 202 to protect photoelectric sensor body 102.

[0023] As shown in the figure, a photoelectric sensor signal interference shielding structure, including connecting head 1, the rear end surface of connecting head 1 is provided with connecting line 101, and the middle part of the front end surface of connecting head 1 is provided with photoelectric sensor body 102, and the front end surface of connecting head 1 is provided with protective shell 2, the advantages of this setting are that through the setting of protective shell 2, the photoelectric sensor body 102 can be protected, and the signal can be interfered and shielded at the same time.

[0024] Figures 3-4 ​As shown, the lower end outer surface of the protective shell 2 is provided with a threaded groove one 204, and the outer surface of the threaded groove one 204 is spirally installed with a connecting sleeve 301, the outer surface of the connecting head 1 is provided with a threaded groove two 3, and the connecting head 1 and the protective shell 2 are fixedly connected through the connecting sleeve 301, The advantage of this setting is that through the setting of the connecting sleeve 301, the connection and removal of the connecting head 1 and the protective shell 2 can be facilitated.

[0025] Further, the front end surface of the connecting head 1 is provided with a positioning ring 4, and the outer surface of the positioning ring 4 is provided with a positioning groove 401, and the inner surface of the positioning groove 401 is provided with a sealing gasket 402, and the front end surface of the positioning ring 4 is provided with a clamping groove 403, The advantage of this setting is that through the setting of the sealing gasket 402, the connection tightness of the connecting head 1 and the protective shell 2 can be improved to prevent water vapor from entering the inside of the photoelectric sensor body 102.

[0026] Further, the inner surface of the sealing gasket 402 is installed with a desiccant bag 404, and the desiccant bag 404 is composed of montmorillonite powder, The advantage of this setting is that through the setting of the desiccant bag 404, the water vapor seeping from the connection between the connecting head 1 and the protective shell 2 can be absorbed, ensuring the dryness inside the protective shell 2.

[0027] Working principle: when using the photoelectric sensor signal interference shielding structure, first, when the photoelectric sensor body 102 is needed, the connecting head 1 with the positioning ring 4 is inserted into the inner surface of the protective shell 2, and then the connecting sleeve 301 is rotated into the threaded groove two 3 from the threaded groove one 204 to fix the connecting head 1, During the use of the photoelectric sensor body 102, the protective shell 2 can protect the photoelectric sensor body 102 while shielding its signal, ensuring the normal work of the photoelectric sensor body 102, If the surface of the protective shell 2 produces electric charge, it can be quickly discharged through the grounding plate 202; When working in a humid environment, if water vapor seeps into the inside of the protective shell 2 through the sealing gasket 402, the desiccant bag 404 installed on the front end surface of the positioning ring 4 can absorb the water vapor, ensuring the dryness inside the protective shell 2. This is the working principle of the photoelectric sensor signal interference shielding structure.

Claims

1. A signal interference shielding structure for a photoelectric sensor, comprising a connector (1), characterized in that, The connector (1) has a connecting line (101) on its rear end surface and a photoelectric sensor body (102) in the middle of its front end surface. The connector (1) also has a protective shell (2) on its front end surface. The outer surface of the protective shell (2) has a Faraday cage pattern (201) and the Faraday cage pattern (201) is a grid pattern. The lower outer surface of the protective shell (2) has a ground plane (202) and the ground plane (202) is L-shaped. The inner surface of the protective shell (2) has a metal shielding layer (203) and the metal shielding layer (203) is composed of copper foil.

2. The photoelectric sensor signal interference shielding structure according to claim 1, characterized in that, The lower outer surface of the protective shell (2) is provided with a threaded groove (204), and a connecting sleeve (301) is spirally installed on the outer surface of the threaded groove (204).

3. The photoelectric sensor signal interference shielding structure according to claim 1, characterized in that, The outer surface of the connector (1) is provided with a threaded groove (3), and the connector (1) and the protective shell (2) are fixedly connected by a connecting sleeve (301).

4. The photoelectric sensor signal interference shielding structure according to claim 1, characterized in that, The connector (1) has a positioning ring (4) in the middle of its front end surface, and the outer surface of the positioning ring (4) has a positioning groove (401).

5. The photoelectric sensor signal interference shielding structure according to claim 4, characterized in that, The inner surface of the positioning groove (401) is provided with a sealing gasket (402), and the front end surface of the positioning ring (4) is provided with a slot (403).

6. The photoelectric sensor signal interference shielding structure according to claim 5, characterized in that, The inner surface of the sealing gasket (402) is fitted with a desiccant pack (404), and the desiccant pack (404) is composed of montmorillonite powder.

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