Wireless pyroelectric infrared sensor

Abstract

A wireless pyroelectric infrared sensor comprises a sensor body, a probe is arranged on the sensor body, the wireless pyroelectric infrared sensor further comprises a protective shell used for containing the sensor body, one end of the protective shell is provided with an opening, a lifting mechanism used for controlling the sensor body to ascend and descend is arranged in the protective shell, and a plurality of elastic bands which are transversely arranged are arranged at the opening end of the protective shell. When the lifting mechanism drives the sensor body to extend out of the protective shell from the open end, a probe of the sensor body extrudes a gap between every two adjacent elastic belts and penetrates out of the position between the two elastic belts, and through the arrangement of the protective shell, the sensor body can be well protected; when the sensor body and the elastic band slide relative to each other, the elastic band can erase dust attached to the probe and the shell of the sensor body, and when the sensor body is recycled into the protective shell, the elastic band automatically resets to shield the open end of the protective shell, so that dust in the environment is prevented from entering the protective shell.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared sensors, in particular to a wireless pyroelectric infrared sensor. Background Art

[0002] Pyroelectric infrared sensors use infrared detection technology to detect infrared radiation from humans and animals, enabling non-contact human detection. They are often used in hazardous areas such as mines. Due to the dusty environment of mining areas, dust adheres to the outer surface of the sensor probe, scattering, absorbing, and reflecting infrared light, weakening the intensity of the infrared light received by the probe and thus affecting reception. To minimize the impact of dust on the probe's infrared reception, measures can be taken, such as regularly cleaning the receiver surface, selecting an appropriate installation location, and maintaining a clean environment.

[0003] The dust on the surface of existing wireless pyroelectric infrared sensors relies on manual cleaning. However, the sensors are generally installed at the top of the tunnel, making the cleaning work difficult, time-consuming and labor-intensive. Utility Model Content

[0004] In order to solve the problem that dust on the surface of the sensor is difficult to clean and affects the detection accuracy, the utility model provides a wireless pyroelectric infrared sensor.

[0005] The technical solution of this utility model is as follows:

[0006] A wireless pyroelectric infrared sensor includes a sensor body, a probe provided on the sensor body, and a protective shell with an open end for accommodating the sensor body. A lifting mechanism for controlling the lifting of the sensor body is provided in the protective shell. The open end of the protective shell is provided with several elastic bands arranged laterally, and adjacent elastic bands have splicing seams between them for the sensor body to pass through.

[0007] In order to prevent the elastic band from causing wear to the probe surface, the elastic band is an elastic cloth strip made of pure cotton.

[0008] In order to facilitate the replacement and cleaning of the elastic band, the open end of the protective shell is threadedly connected to a cover body, and a through hole is provided in the middle of the cover body. The diameter of the through hole is larger than the maximum outer diameter of the sensor body. Several elastic bands are arranged horizontally on the surface of the cover body to cover the through hole.

[0009] As a specific embodiment of the elastic band, two elastic bands are provided, and the two elastic bands are symmetrically arranged on the surface of the cover body about the center line of the through hole, and adjacent sides of the two elastic bands have overlapping areas.

[0010] As another specific embodiment of the elastic band, the elastic band is strip-shaped, and there are at least four elastic bands arranged horizontally. Two pressure rods are symmetrically provided on the through hole. The pressure rods are perpendicular to the direction of the elastic band, and the distance between the two pressure rods is greater than the maximum diameter of the sensor body.

[0011] In order to facilitate the removal of dust on the surface of the elastic band, a plurality of fans are provided on the side wall of the sensor body, and the fans face the elastic band.

[0012] In order to control the lifting and lowering movement of the sensor body, the lifting mechanism includes a telescopic cylinder arranged in the protective shell, and a sliding seat slidably connected to the inner cavity of the protective shell. The telescopic cylinder has a fixed end and a telescopic end. The fixed end of the telescopic cylinder is fixed to the inner wall of the protective shell, and the telescopic end of the telescopic cylinder is fixedly connected to the sliding seat. The sensor body is fixedly installed on the sliding seat, and a spring is fixedly connected between the inner wall of the protective shell and the sliding seat.

[0013] In order to limit the sliding stroke of the sliding seat, a first limiting boss and a second limiting boss are arranged at intervals in the protective shell, and the sliding seat is located between the first limiting boss and the second limiting boss.

[0014] In order to facilitate the fixed installation of the protective shell, a plurality of fixing ears are provided on the side of the protective shell away from the opening end, and slots are provided on the fixing ears.

[0015] The beneficial effects of the present invention are:

[0016] 1. The utility model is a wireless pyroelectric infrared sensor. When the sensor body is in standby mode, the lifting mechanism drives the sensor body to be retracted into the protective shell. The setting of the protective shell can provide good protection for the sensor body, isolate dust particles in the mining area, ensure the cleanliness of the sensor body surface, and prevent dust from affecting the detection accuracy of the sensor body. At the same time, the protective shell can also prevent the impact of flying stones and splashing ore on the sensor body, reduce the damage rate of the sensor body during use, and increase the service life of the sensor body.

[0017] As the lifting mechanism extends or retracts the sensor body, the elastic band comes into contact with the probe and sensor housing. As the sensor body and elastic band slide against each other, the elastic band removes dust from the probe and sensor housing, keeping the probe and housing clean and preventing dust from adhering to the probe surface and affecting the intensity of infrared light received. It should also be noted that when the sensor body is retracted into the protective housing, the elastic band automatically resets to block the opening of the protective housing, preventing dust from entering the protective housing.

[0018] The provision of the fixing ears facilitates fixing the protective shell at a designated position in the mining area, and the fixing ears are provided with slots, which facilitate the installation of fasteners.

[0019] 2. The elastic band is made of pure cotton. This elastic band is readily available and inexpensive, making it easy to produce and cost-effective. Furthermore, its soft texture prevents damage to the probe when rubbed against it, preventing severe wear and tear on the probe surface.

[0020] By setting the elastic band on the detachable cover, the elastic band can be quickly replaced. The staff can replace the elastic band that has been used for a period of time, clean it, and then recycle it. This not only ensures the cleaning effect of the elastic band on the surface of the sensor body, but also saves the procurement cost of the cover and the elastic band.

[0021] 3. There are two elastic bands, which are symmetrically arranged on the surface of the cover body about the center line of the through hole. This design method is adopted for the elastic band, which can make the elastic band fully contact with the middle part of the probe, thereby ensuring the effect of the elastic band on cleaning the probe. The adjacent sides of the two elastic bands have overlapping areas that overlap with each other. The setting of the overlapping area can not only ensure that the elastic band is in full contact with the sensor body and the probe, but also ensure the sealing of the joint between the two elastic bands after the sensor body is recovered into the protective shell, thereby improving the dust isolation effect.

[0022] 4. There are at least four elastic bands arranged horizontally. This design can effectively reduce the tension of the elastic bands away from the center of the through-hole, while ensuring that the elastic bands in the middle area are in full contact with the probe, and reducing the resistance encountered by the sensor body during extension. It should be noted that the elastic bands are preferably arranged in an even number. When the elastic bands are arranged in an even number, the joint seam is on the center line of the through-hole, which facilitates the probe to pass through the joint seam. Two pressure rods are symmetrically arranged on the through-hole, and the pressure rods are perpendicular to the direction of the elastic bands. The setting of the pressure rods can limit the edges of the elastic bands to prevent large gaps from appearing at the edges of adjacent elastic bands after the elastic bands are stretched, causing a large amount of dust to enter the protective shell through the gaps. In order to prevent the pressure rods from interfering with the extension or retraction of the sensor body, the distance between the two pressure rods is greater than the maximum diameter of the sensor body.

[0023] 5. There are vents on the surface of the elastic belt. When the sensor body switches from the working state to the standby state and is recovered into the protective shell, the fan starts to blow the elastic belt to clean the dust attached to the surface of the elastic belt, ensuring the cleaning effect of the elastic belt when the sensor body is extended to work next time. On the other hand, the setting of the fan can also dissipate heat and cool the sensor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description of the preferred embodiment below, the solutions and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not to be considered as limiting the present invention.

[0025] In the attached figure:

[0026] Figure 1 This is one of the schematic diagrams of the structure of the utility model;

[0027] Figure 2 This is the second schematic diagram of the structure of the utility model;

[0028] Figure 3 It is a three-dimensional diagram of the utility model;

[0029] Figure 4 This is a schematic structural diagram of the first embodiment of the present utility model;

[0030] Figure 5 This is a schematic structural diagram of the second embodiment of the present utility model;

[0031] The components represented by the reference numerals in the figure are:

[0032] 1. Protective shell; 101. Sliding seat; 2. Sensor body; 201. Probe; 202. Fan; 3. Cover; 301. Through hole; 302. Elastic band; 303. Pressure rod; 304. Overlap area; 4. First limiting boss; 401. Second limiting boss; 5. Telescopic cylinder; 501. Spring; 6. Fixing ear; 601. Slot. DETAILED DESCRIPTION

[0033] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. The present disclosure can be implemented in various forms and should not be limited by the embodiments described herein.

[0034] Example

[0035] Reference Figure 1-Figure 5, a wireless pyroelectric infrared sensor, a sensor body 2, a probe 201 is provided on the sensor body 2, and also includes a protective shell 1 for accommodating the sensor body 2 and having an opening at one end, a lifting mechanism is provided in the protective shell 1 for controlling the lifting of the sensor body 2, when the sensor body 2 enters the working state, the lifting mechanism drives the sensor body 2 to extend from the protective shell 1, so that the probe 201 of the sensor body 2 protrudes from the protective shell 1 to receive infrared rays in the environment, when the sensor body 2 is in the standby state, the lifting mechanism drives the sensor body 2 to be retracted into the protective shell 1, and the setting of the protective shell 1 can play a good protective role on the sensor body 2, isolate dust particles in the mining area, ensure the cleanliness of the surface of the sensor body 2, and prevent dust from affecting the detection accuracy of the sensor body 2, at the same time, the protective shell 1 can also prevent flying stones and splashing ores from impacting the sensor body 2, reduce the damage rate of the sensor body 2 during use, and increase the service life of the sensor body 2. The open end of the protective housing 1 is equipped with several transversely arranged elastic bands 302. Adjacent elastic bands 302 form a seam between each of the two elastic bands 302, allowing the sensor body 2 to pass through. When the lifting mechanism drives the sensor body 2 out of the open end of the protective housing 1, the probe 201 of the sensor body 2 squeezes the gap between two adjacent elastic bands 302 and passes through them. During the process of extending or retracting the sensor body 2 with the lifting mechanism, the elastic bands 302 come into contact with the probe 201 and the outer shell of the sensor body 2. As the sensor body 2 and the elastic bands 302 slide against each other, the elastic bands 302 wipe away dust adhering to the probe 201 and the outer shell of the sensor body 2, thereby maintaining a clean surface of the probe 201 and the outer shell of the sensor body 2, preventing dust from adhering to the probe 201 and affecting the intensity of infrared light received by the probe 201. It should also be noted that when the sensor body 2 is retracted into the protective housing 1, the elastic bands 302 automatically return to block the open end of the protective housing 1, preventing dust from entering the interior of the protective housing 1. A plurality of fixing ears 6 are provided on the side of the protective shell 1 away from the open end. The setting of the fixing ears 6 facilitates the fixing of the protective shell 1 at a designated position in the mining area. The fixing ears 6 are provided with slots 601, which facilitate the installation of fasteners such as bolts, rivets, etc.

[0036] Specifically, the elastic band 302 is a stretchy cloth made of pure cotton. This stretchy cotton cloth is readily available and inexpensive, making it easy to produce and inexpensive. Furthermore, its soft texture prevents damage to the probe 201 when rubbed against it, thus preventing severe wear and tear on the probe 201 surface.

[0037] As a preferred embodiment of this application, refer to Figure 1-Figure 5The open end of the protective housing 1 is threadedly connected to a cover 3. A through-hole 301 is defined in the center of the cover 3. To ensure that the sensor body 2 can be extended or retracted, the diameter of the through-hole 301 is larger than the maximum outer diameter of the sensor body 2. Several elastic bands 302 are arranged transversely on the surface of the cover 3 to shield the through-hole 301. By placing the elastic bands 302 on the detachable cover 3, they can be quickly replaced. Staff can then replace and clean the elastic bands 302 after they have been used for a period of time and reuse them. This ensures that the elastic bands 302 effectively clean the surface of the sensor body 2 while also saving the procurement costs of the cover 3 and the elastic bands 302.

[0038] The present application does not elaborate on the number and arrangement of the elastic bands 302 , and any of the following embodiments may be used:

[0039] Example 1, refer to Figure 3 and Figure 4 There are two elastic bands 302, and the two elastic bands 302 are symmetrically arranged on the surface of the cover body 3 about the center line of the through hole 301. This design method is adopted for the elastic band 302, which can make the elastic band 302 fully contact with the middle part of the probe 201, thereby ensuring the effect of the elastic band 302 on cleaning the probe 201. The adjacent sides of the two elastic bands 302 have overlapping areas 304 that overlap with each other. The setting of the overlapping area 304 can not only ensure that the elastic band 302 is in full contact with the sensor body 2 and the probe 201, but also ensure the sealing of the joint between the two elastic bands 302 after the sensor body 2 is recovered into the protective shell 1, thereby improving the dust isolation effect.

[0040] Example 2, refer to Figure 5 The elastic band 302 is in the form of a strip, and there are at least four elastic bands 302 arranged horizontally. This design can effectively reduce the tension of the elastic band 302 away from the center of the through hole 301, while ensuring that the elastic band 302 in the central area is in full contact with the probe 201, and reducing the resistance encountered by the sensor body 2 during extension. It should be noted that the elastic band 302 is preferably arranged in an even number. When the elastic band 302 in an even number is arranged, the splicing seam is on the center line of the through hole 301, which facilitates the probe 201 to pass through the splicing seam. Two pressure rods 303 are symmetrically provided on the through hole 301. The pressure rods 303 are perpendicular to the direction of the elastic band 302. The arrangement of the pressure rods 303 can limit the edges of the elastic band 302, preventing large gaps from forming at the edges of adjacent elastic bands 302 after the elastic band 302 is extended, causing a large amount of dust to enter the protective housing 1 through the gaps. In order to prevent the pressure rods 303 from interfering with the extension or retraction of the sensor body 2, the distance between the two pressure rods 303 is greater than the maximum diameter of the sensor body 2.

[0041] Reference Figure 1 and Figure 2The sensor body 2 is provided with a plurality of fans 202 on its side walls, facing the elastic band 302. Ventilation holes are provided on the surface of the elastic band 302. When the sensor body 2 switches from the working state to the standby state and is retracted into the protective housing 1, the fans 202 start to blow through the elastic band 302, clearing away dust adhering to the surface of the elastic band 302. This ensures that the elastic band 302 is cleaned effectively when the sensor body 2 is extended for operation the next time. Furthermore, the fans 202 can also dissipate heat and cool the sensor body 2.

[0042] Reference Figure 1 and Figure 2 The specific embodiment of the lifting mechanism is as follows: the lifting mechanism includes a telescopic cylinder 5 disposed within the protective housing 1 and a sliding seat 101 slidably connected to the inner cavity of the protective housing 1. The telescopic cylinder 5 has a fixed end and a telescopic end. The fixed end of the telescopic cylinder 5 is fixed to the inner wall of the protective housing 1, and the telescopic end of the telescopic cylinder 5 is fixedly connected to the sliding seat 101. When the sensor body 2 needs to be extended from the protective housing 1, the telescopic end of the telescopic cylinder 5 is controlled and driven to extend, and the telescopic end pushes the sliding seat 101 to slide toward the side closer to the opening end, thereby pushing the sensor body 2 out of the protective housing 1. The sensor body 2 is fixedly mounted on the sliding seat 101, which helps to ensure the stability of the posture of the sensor body 2 during movement. A spring 501 is fixedly connected between the inner wall of the protective housing 1 and the sliding seat 101. When the telescopic cylinder 5 is retracted, the spring 501 converts elastic potential energy into kinetic energy to drive the sliding seat 101 to reset. It should be noted that the sensor body 2 and the telescopic cylinder 5 are both connected to a controller and controlled via wireless signals. This is a well-known prior art to those skilled in the art and will not be described in detail here.

[0043] A first limiting boss 4 and a second limiting boss 401 are spaced apart within the protective housing 1, with the sliding seat 101 positioned between the first limiting boss 4 and the second limiting boss 401. The first limiting boss 4 and the second limiting boss 401 limit the sliding movement of the sliding seat 101, preventing it from excessive displacement and ensuring the stability of the position of the sensor body 2.

Claims

1. A wireless pyroelectric infrared sensor, comprising a sensor body (2), wherein a probe (201) is provided on the sensor body (2), characterized in that: The invention also includes a protective shell (1) for accommodating the sensor body (2) and having an open end. A lifting mechanism for controlling the lifting of the sensor body (2) is provided in the protective shell (1). The open end of the protective shell (1) is provided with a plurality of elastic bands (302) arranged transversely. There are joints between adjacent elastic bands (302) for the sensor body (2) to pass through.

2. The wireless pyroelectric infrared sensor according to claim 1, characterized in that: The elastic band (302) is a cloth strip with elasticity, and the elastic band (302) is made of pure cotton.

3. The wireless pyroelectric infrared sensor according to claim 2, characterized in that: The open end of the protective shell (1) is threadedly connected to a cover body (3), a through hole (301) is provided in the middle of the cover body (3), the diameter of the through hole (301) is larger than the maximum outer diameter of the sensor body (2), and a plurality of elastic bands (302) are arranged transversely on the surface of the cover body (3) to shield the through hole (301).

4. The wireless pyroelectric infrared sensor according to claim 3, characterized in that: Two elastic bands (302) are provided, and the two elastic bands (302) are symmetrically arranged on the surface of the cover body (3) about the center line of the through hole (301), and the adjacent sides of the two elastic bands (302) have overlapping areas (304) that overlap each other.

5. The wireless pyroelectric infrared sensor according to claim 3, characterized in that: The elastic band (302) is strip-shaped, and at least four elastic bands (302) are arranged transversely. Two pressure rods (303) are symmetrically provided on the through hole (301), and the pressure rods (303) are perpendicular to the direction of the elastic band (302). The distance between the two pressure rods (303) is greater than the maximum diameter of the sensor body (2).

6. A wireless pyroelectric infrared sensor according to any one of claims 1 to 5, characterized in that: A plurality of fans (202) are provided on the side wall of the sensor body (2), and the fans (202) face the elastic band (302).

7. A wireless pyroelectric infrared sensor according to any one of claims 1 to 5, characterized in that: The lifting mechanism comprises a telescopic cylinder (5) arranged in a protective shell (1), and a sliding seat (101) slidably connected to the inner cavity of the protective shell (1); the telescopic cylinder (5) has a fixed end and a telescopic end; the fixed end of the telescopic cylinder (5) is fixed to the inner wall of the protective shell (1); the telescopic end of the telescopic cylinder (5) is fixedly connected to the sliding seat (101); the sensor body (2) is fixedly mounted on the sliding seat (101); and a spring (501) is fixedly connected between the inner wall of the protective shell (1) and the sliding seat (101).

8. The wireless pyroelectric infrared sensor according to claim 7, characterized in that: A first limiting boss (4) and a second limiting boss (401) are arranged at intervals in the protective shell (1), and the sliding seat (101) is located between the first limiting boss (4) and the second limiting boss (401).

9. The wireless pyroelectric infrared sensor according to claim 1, characterized in that: The protective shell (1) is provided with a plurality of fixing ears (6) on a side away from the opening end, and the fixing ears (6) are provided with slots (601).

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