Anti-electromagnetic interference sensor

Abstract

The utility model discloses an anti-electromagnetic interference sensor, which relates to the technical field of sensors and comprises a gas sensor, a shielding shell is sleeved outside the gas sensor, the top of the shielding shell is connected with a shielding cover, a through hole is arranged on the outer surface of the shielding cover, and a shielding plate and a shielding ring are respectively arranged inside the shielding cover. Through the arrangement of the shielding shell, the shielding case, the through hole, the shielding plate and the shielding ring, dry magnetic interference on the periphery of the gas sensor is shielded through the shielding shell, electromagnetic interference on air holes is shielded through the shielding case, and meanwhile air can conveniently enter the gas sensor through the through hole; the shielding plate and the shielding ring enable the internal path of the shielding cover to be in a labyrinth shape, on one hand, air entering cannot be greatly influenced, air circulation is facilitated, and on the other hand, the labyrinth shape can shield electromagnetic interference penetrating through the through hole; and negative effects of the gas sensor caused by electromagnetic interference are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, and specifically relates to a sensor with anti-electromagnetic interference. Background Art

[0002] A gas sensor is a converter that converts the volume fraction of a certain gas into a corresponding electrical signal. The detection head conditions the gas sample through the gas sensor, usually including filtering out impurities and interfering gases, and drying or refrigerating the instrument display part. It is a device that converts information such as the composition and concentration of a gas into information that can be utilized by personnel, instruments, computers, etc.

[0003] Many electronic components are very sensitive to electromagnetic radiation. For example, a gas sensor may be affected by various electromagnetic radiation sources in the external environment during operation, such as radio frequency signals, wireless communication, radar, etc. These radiation sources may have a negative impact on internal electronic devices and are likely to affect the measurement accuracy. In particular, a gas sensor usually has a pore at one end to facilitate the entry of air for contact with the sensitive element for detection, which may easily allow electromagnetic interference to enter through this pore and interfere with the sensitive element. Content of the Utility Model

[0004] Based on this, the purpose of the present utility model is to provide a sensor with anti-electromagnetic interference to solve the technical problems mentioned in the above background art.

[0005] To achieve the above purpose, the present utility model provides the following technical solution: A sensor with anti-electromagnetic interference, including a gas sensor, a shielding shell is sleeved outside the gas sensor, and a shielding cover is connected to the top of the shielding shell. Through holes are opened on the outer surface of the shielding cover, and a shielding plate and a shielding ring are respectively arranged inside the shielding cover.

[0006] By adopting the above technical solution, the shielding shell shields the magnetic interference received by the gas sensor from all around, and at the same time, the shielding cover shields the electromagnetic interference received by the pore. At the same time, the through holes facilitate the entry of air into the gas sensor. The shielding plate and the shielding ring make the internal path of the shielding cover in a maze shape. Firstly, it will not cause too much impact on the entry of air and is convenient for air circulation. Secondly, the maze shape can shield the electromagnetic interference passing through the through holes.

[0007] Further, a plurality of through holes are provided, and the plurality of through holes are distributed in an annular array.

[0008] By adopting the above technical solution, when the gas sensor is working, the shielding cover shields the electromagnetic interference received by the pore, and at the same time, the through holes facilitate the entry of air into the gas sensor.

[0009] Further, the cross-section of the shielding plate is in the shape of a "rice" character.

[0010] By adopting the above technical solution, the shielding plate and shielding ring make the internal path of the shielding cover maze-like. First, it will not have a significant impact on the entry of air and facilitates air circulation. Second, the maze shape can shield electromagnetic interference passing through the through holes.

[0011] Furthermore, the shielding shell, shielding cover, shielding plate, and shielding ring are all made of aluminum alloy, and the surfaces of the shielding shell, shielding cover, shielding plate, and shielding ring are all coated with electromagnetic shielding paint.

[0012] By adopting the above technical solutions, the shielding shell, shielding cover, shielding plate and shielding ring have good electromagnetic interference shielding capabilities, thereby reducing the electromagnetic interference received by the gas sensor.

[0013] Furthermore, the gas sensor has an air hole on its top, and the air hole corresponds to the shielding ring.

[0014] By adopting the above technical solution, when the gas sensor is working, the air inside the device enters the interior of the gas sensor through the air vent, and at this time, the gas sensor detects a certain component in the air.

[0015] Furthermore, the outer surface of the shielding shell is provided with a threaded sleeve and an operating ring.

[0016] By adopting the above technical solution, the operator passes the sensor through the equipment, and then the operator can rotate the control ring with a wrench to rotate the sensor and the threaded sleeve on the sensor, thereby installing the sensor on the equipment.

[0017] Furthermore, the control ring is hexagonal.

[0018] By adopting the above technical solution, the control ring is hexagonal, which facilitates connection with a wrench. The operator can then rotate the control ring with the wrench to install the sensor.

[0019] Furthermore, a dustproof net is provided on the outer ring of the shielding cover.

[0020] By adopting the above technical solution, air enters the gas sensor through the through holes and vents, and the dustproof net effectively reduces the entry of dust.

[0021] Furthermore, a shielded wire is installed at the bottom of the gas sensor.

[0022] By adopting the above technical solution, shielded wires are used to transmit power and electrical signals, avoiding the influence of electromagnetic interference on the electrical signals during transmission and improving stability.

[0023] In summary, the present invention has the following main advantages:

[0024] This invention utilizes a shielding shell, shielding cover, through-hole, shielding plate, and shielding ring. The shielding shell protects the gas sensor from electromagnetic interference from its surroundings, while the shielding cover shields the gas vent from electromagnetic interference. The through-hole facilitates air entry into the gas sensor, and the shielding plate and shielding ring create a maze-like internal path within the shielding cover. This maze-like structure minimizes the impact on airflow and effectively shields electromagnetic interference passing through the through-hole, thus preventing negative impacts from electromagnetic interference on the gas sensor. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0028] Figure 4 This is a schematic diagram of the explosion structure of the shielding cover of this utility model.

[0029] In the diagram: 1. Gas sensor; 2. Gas vent; 3. Shielding wire; 4. Shielding shell; 5. Shielding cover; 6. Through hole; 7. Shielding plate; 8. Shielding ring; 9. Threaded sleeve; 10. Control ring; 11. Dustproof net. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] The embodiments of this utility model will be described below based on its overall structure.

[0032] Example 1:

[0033] A sensor resistant to electromagnetic interference, such as Figures 1-4As shown in the figure, it includes a gas sensor 1. A shielding shell 4 is sleeved outside the gas sensor 1 to shield the dry magnetic interference received around the gas sensor 1. A shielding cover 5 is connected to the top of the shielding shell 4 to shield the electromagnetic interference received by the air hole 2. Through holes 6 are provided on the outer surface of the shielding cover 5. There are multiple through holes 6, and the multiple through holes 6 are distributed in an annular array. The through holes 6 facilitate the entry of air into the interior of the gas sensor 1. Inside the shielding cover 5, a shielding plate 7 and a shielding ring 8 are respectively provided. The cross-section of the shielding plate 7 is in the shape of a "rice" character. The shielding plate 7 and the shielding ring 8 make the internal path of the shielding cover 5 in a maze shape. One is that it will not cause too much impact on the entry of air and is convenient for air circulation. The other is that the maze shape can shield the electromagnetic interference passing through the through holes 6. The shielding shell 4, the shielding cover 5, the shielding plate 7 and the shielding ring 8 are all made of aluminum alloy materials. The surfaces of the shielding shell 4, the shielding cover 5, the shielding plate 7 and the shielding ring 8 are all coated with electromagnetic shielding paint, so that the shielding shell 4, the shielding cover 5, the shielding plate 7 and the shielding ring 8 have good anti-electromagnetic interference capabilities, effectively preventing the gas sensor 1 from being affected by electromagnetic interference.

[0034] Refer to Figures 1-3 , in the above embodiment, an air hole 2 is provided at the top of the gas sensor 1. The air hole 2 corresponds to the shielding ring 8. When the gas sensor 1 works, the air inside the device enters the interior of the gas sensor 1 through the air hole 2. At this time, a certain component in the air is detected by the gas sensor 1. Threaded sleeves 9 and a control ring 10 are respectively provided outside the shielding shell 4. The control ring 10 is hexagonal. When the staff passes this sensor through the device, then the staff can rotate the control ring 10 with a wrench to rotate this sensor and the threaded sleeve 9 on the sensor, so as to install this sensor on the device. A dust-proof net 11 is provided on the outer ring of the shielding cover 5 to effectively reduce the entry of dust through the dust-proof net 11.

[0035] Embodiment 2:

[0036] On the basis of the above Embodiment 1, in order to further increase the electromagnetic interference shielding ability, the following settings are made now.

[0037] Refer to Figures 1-3 , in the above embodiment, a shielded wire 3 is installed at the bottom of the gas sensor 1. The shielded wire 3 is used to transmit the power supply and electrical signals to avoid the electrical signals being affected by electromagnetic interference during the transmission process, thereby improving the stability.

[0038] The implementation principle of this utility model is as follows: First, the operator passes the sensor through the equipment. Then, the operator can rotate the control ring 10 with a wrench to rotate the sensor and the threaded sleeve 9 on the sensor, thereby installing the sensor on the equipment. After that, the operator makes a connector at one end of the shielded wire 3 and connects the connector to the controller, thereby enabling the sensor body to be powered on and to transmit electrical signals. Using the shielded wire 3 to transmit power and electrical signals avoids the electrical signals being affected by electromagnetic interference during transmission, thus improving stability.

[0039] When the gas sensor 1 is working, air inside the device enters the interior of the gas sensor 1 through the air hole 2. At this time, the gas sensor 1 detects a certain component in the air and then sends an electrical signal out through the shielded wire 3.

[0040] When the gas sensor 1 is working, the shielding shell 4 shields the gas sensor 1 from the dry magnetic interference around it, and the shielding cover 5 shields the gas vent 2 from the electromagnetic interference. At the same time, the through hole 6 allows air to enter the gas sensor 1, and the dustproof net 11 effectively reduces the entry of dust. The shielding plate 7 and the shielding ring 8 make the internal path of the shielding cover 5 maze-like. First, it will not have a great impact on the entry of air and facilitates air circulation. Second, the maze shape can shield the electromagnetic interference passing through the through hole 6.

[0041] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A sensor resistant to electromagnetic interference, comprising a gas sensor (1), characterized in that: The gas sensor (1) is externally sleeved with a shielding shell (4), and a shielding cover (5) is connected to the top of the shielding shell (4). Through holes (6) are formed on the outer surface of the shielding cover (5), and a shielding plate (7) and a shielding ring (8) are respectively arranged inside the shielding cover (5).

2. The electromagnetic interference resistant sensor according to claim 1, characterized in that: A plurality of the through holes (6) are provided, and the plurality of through holes (6) are distributed in an annular array.

3. The electromagnetic interference resistant sensor according to claim 1, characterized in that: The cross section of the shielding plate (7) is in the shape of a "rice" character.

4. The electromagnetic interference resistant sensor according to claim 3, characterized in that: The shielding shell (4), the shielding cover (5), the shielding plate (7) and the shielding ring (8) are all made of aluminum alloy material, and electromagnetic shielding coatings are coated on the surfaces of the shielding shell (4), the shielding cover (5), the shielding plate (7) and the shielding ring (8).

5. The electromagnetic interference resistant sensor according to claim 1, characterized in that: An air hole (2) is formed at the top of the gas sensor (1), and the air hole (2) corresponds to the shielding ring (8).

6. The electromagnetic interference resistant sensor according to claim 1, characterized in that: A threaded sleeve (9) and a manipulation ring (10) are respectively arranged outside the shielding shell (4).

7. The electromagnetic interference resistant sensor according to claim 6, characterized in that: The manipulation ring (10) is hexagonal.

8. The electromagnetic interference resistant sensor according to claim 1, characterized in that: A dust-proof net (11) is arranged on the outer ring of the shielding cover (5).

9. The electromagnetic interference resistant sensor according to claim 5, characterized in that: A shielding wire (3) is installed at the bottom of the gas sensor (1).

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