Infrared pyroelectric sensor

Abstract

The utility model provides an infrared pyroelectric sensor, and relates to the technical field of sensors, the infrared pyroelectric sensor comprises a pyroelectric sensor body, the top end of the pyroelectric sensor body is provided with a thread groove, the top end of the thread groove is provided with a lens assembly, and the bottom end of the pyroelectric sensor body is provided with a dismounting assembly; the dismounting assembly comprises a splicing frame, a threaded pipe and a power source pin, the splicing frame is arranged at the bottom end of the pyroelectric sensor body, the threaded pipe is connected to the top end of the splicing frame, and the pyroelectric sensor body is designed to be of a detachable structure, so that the interior of the pyroelectric sensor body can be conveniently inspected and maintained in the later period; the bottom end of the pyroelectric sensor body is designed to be of a detachable structure, the splicing frame of the disassembly assembly is installed at the bottom end of the pyroelectric sensor body through the threaded pipe in a threaded mode, the splicing frame and the power source pin are installed and disassembled, and the maintenance speed of a maintainer for the pyroelectric sensor is greatly increased.

Description

Technical Field

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

[0002] Pyroelectric infrared sensors are mainly made of a material with a high thermoelectric coefficient, such as lead zirconate titanate ceramics, lithium tantalate, triglycan titanium sulfate, etc., to form a detection element with a size of 2*1mm. One or two detection elements are installed in each detector, and the two detection elements are connected in series with reverse polarity to suppress the interference caused by the increase in their own temperature. The detection element converts the detected and received infrared radiation into a weak voltage signal, which is amplified by the field effect tube installed in the probe and then output.

[0003] When the prior art infrared pyroelectric sensor is in use, the internal components of the infrared pyroelectric sensor are damaged, and it is difficult to quickly disassemble the internal components of the infrared pyroelectric sensor for inspection and repair, which increases the difficulty of disassembling the infrared pyroelectric sensor for maintenance workers.

[0004] Therefore, the utility model provides an infrared pyroelectric sensor. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings in the prior art and provide an infrared pyroelectric sensor.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an infrared pyroelectric sensor, comprising a pyroelectric sensor body, a thread groove is provided at the top of the pyroelectric sensor body, a lens assembly is installed at the top of the thread groove, and a disassembly assembly is provided at the bottom of the pyroelectric sensor body;

[0007] The disassembly assembly includes a splicing frame, a threaded tube and a power pin. The bottom end of the pyroelectric sensor body is provided with a splicing frame, and the top end of the splicing frame is connected to the threaded tube, and the bottom end of the splicing frame is connected to the power pin;

[0008] The bottom end of the disassembly component is connected with a signal pin; the bottom end of the signal pin is installed with an anti-slip component.

[0009] As a preferred implementation, the splicing frame is connected to the threaded tube, and two groups of power pins are provided.

[0010] The technical effect of adopting the above further solution is that the pyroelectric sensor body is designed as a detachable structure, which is convenient for later inspection and maintenance of the inside of the pyroelectric sensor body.

[0011] As a preferred implementation, the splicing frame is a hollow structure, and the splicing frame is fixedly connected to the power pins.

[0012] The technical effect of adopting the above further scheme is: the bottom part of the pyroelectric sensor body is designed as a detachable structure, and the splicing frame of the disassembled component is installed on the bottom end of the pyroelectric sensor body by using a threaded pipe thread, and the splicing frame and the power pins are installed. The power pins are grouped in twos, one group is the negative power pin, and the other group is the positive power pin, and the installation is carried out, and the information connection is carried out for the negative power pin and the positive power pin through the signal pin.

[0013] As a preferred embodiment, the lens assembly includes a card cover, a Fresnel lens and a screw tube, the card cover is installed on the top of the threaded groove, the Fresnel lens is arranged in the middle of the card cover, and the screw tube is connected to the bottom of the card cover.

[0014] The technical effect of adopting the above further solution is: a threaded groove is provided at the top of the pyroelectric sensor body, so that the cover of the lens assembly can be easily installed in the threaded groove by rotating it through a screw tube for assembly.

[0015] As a preferred implementation manner, the card cover is connected to the Fresnel lens, and the screw tube is fixedly connected to the Fresnel lens.

[0016] The technical effect of adopting the above further scheme is: a Fresnel lens is arranged in the middle part of the card cover, and the Fresnel lens uses the special optical principle of the lens to produce an alternating "blind area" and "high sensitivity area" in front of the detector to improve its detection and receiving sensitivity. When someone walks in front of the lens, the infrared rays emitted by the human body continuously alternate from the "blind area" to the "high sensitivity area", so that the received infrared signal is input in the form of intermittently strong and weak pulses, thereby enhancing its energy amplitude.

[0017] As a preferred embodiment, the anti-slip assembly includes a positioning plate, bolts, an anti-sliding block and an installation slot. The bottom end of the signal pin is installed with a positioning plate, and bolts are passed through an outer wall of the positioning plate. An anti-sliding block is arranged around the inner wall of the positioning plate, and installation slots are opened on both sides of the middle part of the positioning plate.

[0018] The technical effect of adopting the above-mentioned further scheme is: an anti-slip component is provided at the bottom end of the splicing frame and the power pin, which facilitates the stable installation of the splicing frame of the pyroelectric sensor body at the installation position, and the positioning plate can be locked to the bottom end of the splicing frame by passing bolts through the middle of the positioning plate. An anti-sliding block is provided on the outer surface of the splicing frame to increase the tightness between the installation object and the splicing frame, thereby greatly improving the stability of the installation of the splicing frame.

[0019] As a preferred implementation, the positioning plate forms a fixed structure with the anti-sliding block through bolts, and two groups of the mounting slots are provided.

[0020] The technical effect of adopting the above further solution is: preventing the splicing frame from sliding during installation, and the two groups of power pins are respectively inserted into the installation slots of the positioning plate for installation.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are:

[0022] The pyroelectric sensor body is designed to be a detachable structure, which facilitates the later inspection and maintenance of the inside of the pyroelectric sensor body. The bottom part of the pyroelectric sensor body is designed to be a detachable structure. The splicing frame of the disassembled component is installed on the bottom of the pyroelectric sensor body using a threaded pipe thread. The splicing frame and the power pins are installed and disassembled, which greatly improves the speed of maintenance workers to repair the pyroelectric sensor. The power pins are divided into two groups, one group is the negative power pin, and the other group is the positive power pin. They are installed, and the signal pins are used to connect the negative power pin and the positive power pin for information. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the infrared pyroelectric sensor of the utility model;

[0024] Figure 2 This is a top view of the lens assembly of the utility model;

[0025] Figure 3 This is a bottom-up structural diagram of the infrared pyroelectric sensor of the utility model;

[0026] Figure 4 It is a bottom view of the disassembly component and the anti-skid component of the utility model.

[0027] Among them: 1. Pyroelectric sensor body; 2. Threaded groove; 3. Lens assembly; 301. Card cover; 302. Fresnel lens; 303. Screw tube; 4. Disassembly assembly; 401. Splicing frame; 402. Threaded tube; 403. Power pin; 5. Signal pin; 6. Anti-slip assembly; 601. Positioning plate; 602. Bolt; 603. Anti-slip block; 604. Installation slot. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the utility model provides a technical solution: an infrared pyroelectric sensor, comprising a pyroelectric sensor body 1, a thread groove 2 is provided at the top of the pyroelectric sensor body 1, a lens assembly 3 is installed at the top of the thread groove 2, and a disassembly assembly 4 is provided at the bottom of the pyroelectric sensor body 1;

[0031] The disassembly component 4 includes a splicing frame 401, a threaded tube 402 and a power pin 403. The splicing frame 401 is arranged at the bottom end of the pyroelectric sensor body 1, and the top end of the splicing frame 401 is connected to the threaded tube 402, and the bottom end of the splicing frame 401 is connected to the power pin 403;

[0032] The bottom end of the disassembly component 4 is connected to a signal pin 5; the bottom end of the signal pin 5 is installed with an anti-slip component 6. Specifically, first, the pyroelectric sensor body 1 is designed as a detachable structure, which is convenient for later inspection and maintenance of the inside of the pyroelectric sensor body 1. The bottom end part of the pyroelectric sensor body 1 is designed as a detachable structure. The splicing frame 401 of the disassembly component 4 is threadedly installed on the bottom end of the pyroelectric sensor body 1 using a threaded tube 402, and the splicing frame 401 and the power pin 403 are installed. The power pins 403 are grouped in twos, one group is the negative power pin, and the other group is the positive power pin. The installation process is carried out, and the information connection process is carried out for the negative power pin and the positive power pin through the signal pin 5. The splicing frame The bottom ends of the pins 401 and the power pins 403 are provided with anti-skid components 6, which facilitate the stable installation of the splicing frame 401 of the pyroelectric sensor body 1 at the installation position. The positioning plate 601 can be locked to the bottom end of the splicing frame 401 by the bolt 602 penetrating the middle of the positioning plate 601. The outer surface of the splicing frame 401 is provided with an anti-slip block 603 to increase the tightness between the installation object and the splicing frame 401, greatly improve the stability of the installation of the splicing frame 401, and avoid the splicing frame 401 from sliding during the installation process. The two groups of power pins 403 are respectively inserted into the installation slots 604 of the positioning plate 601 for installation. The top of the pyroelectric sensor body 1 is provided with a threaded groove 2, which is convenient for the lens The card cover 301 of the component 3 is rotatably installed on the thread groove 2 through the screw tube 303 for assembly. A Fresnel lens 302 is arranged in the middle of the card cover 301. The Fresnel lens 302 uses the special optical principle of the lens to produce an alternating "blind area" and "high sensitivity area" in front of the detector to improve its detection and receiving sensitivity. When someone walks in front of the lens, the infrared rays emitted by the human body continuously and alternately enter the "high sensitivity area" from the "blind area", so that the received infrared signal is input in the form of pulses that are sometimes strong and sometimes weak, thereby increasing its energy amplitude. Through this technical solution, the problem that the internal components of the infrared pyroelectric sensor are damaged when the infrared pyroelectric sensor is in use, making it difficult to detect the infrared pyroelectric sensor, is solved. The rapid disassembly inspection and maintenance of the internal components of the sensor increases the difficulty of disassembly of the infrared pyroelectric sensor for maintenance workers. The pyroelectric sensor body 1 is designed to be a detachable structure, which is convenient for the later inspection and maintenance of the inside of the pyroelectric sensor body 1. The bottom part of the pyroelectric sensor body 1 is designed to be a detachable structure. The splicing frame 401 of the disassembly component 4 is threadedly installed on the bottom of the pyroelectric sensor body 1 using the threaded tube 402, and the splicing frame 401 and the power pin 403 are installed. The power pins 403 are grouped in twos, one group is the negative power pin, and the other group is the positive power pin. The installation is carried out, and the information connection is carried out for the negative power pin and the positive power pin through the signal pin 5.

[0033] Further, such as Figure 1-2As shown: the anti-skid component 6 also includes a positioning plate 601, a bolt 602, an anti-sliding block 603 and a slot 604. The bottom end of the signal pin 5 is installed with the positioning plate 601, and the outer wall of the positioning plate 601 is penetrated by a bolt 602, and the inner circle of the positioning plate 601 is provided with an anti-sliding block 603. The middle of the positioning plate 601 is provided with a slot 604 on both sides. The advantage of this technical solution is that the anti-skid component 6 is provided at the bottom end of the splicing frame 401 and the power pin 403, which is convenient for splicing the pyroelectric sensor body 1 The frame 401 is stably installed at the installation position. The positioning plate 601 can be locked to the bottom end of the splicing frame 401 by passing the bolt 602 through the middle of the positioning plate 601. The anti-sliding block 603 is provided on the outer surface of the splicing frame 401 to increase the tightness between the installation object and the splicing frame 401, thereby greatly improving the stability of the installation of the splicing frame 401 and preventing the splicing frame 401 from sliding during the installation process. The two sets of power pins 403 are respectively inserted into the installation slots 604 of the positioning plate 601 for installation.

[0034] The above solutions still have the problem of not being convenient for focusing the light energy of the pyroelectric sensor, such as Figure 1 , Figure 2 and Figure 4 As shown: In this solution, the lens assembly 3 includes a card cover 301, a Fresnel lens 302 and a screw tube 303. The card cover 301 is installed on the top of the threaded groove 2, and the Fresnel lens 302 is arranged in the middle of the card cover 301. The bottom end of the card cover 301 is connected to the screw tube 303. A threaded groove 2 is provided at the top of the pyroelectric sensor body 1, so that the cover 301 of the lens assembly 3 can be rotated and installed on the threaded groove 2 through the screw tube 303 for assembly. A Fresnel lens 302 is provided in the middle of the cover 301. The Fresnel lens 302 uses the special optical principle of the lens to produce an alternating "blind area" and "high sensitivity area" in front of the detector to improve its detection and receiving sensitivity. When someone walks in front of the lens, the infrared rays emitted by the human body continuously alternate from the "blind area" to the "high sensitivity area", so that the received infrared signal is input in the form of intermittent pulses, thereby enhancing its energy amplitude. The Fresnel lens 302 is a thin sheet engraved with concentric circles, which has the function of focusing incident light and can also divide the detection area into light and dark areas, thereby improving the performance of the infrared pyroelectric sensor.

[0035] Working principle:

[0036] like Figure 1-4 As shown:

[0037] First, the pyroelectric sensor body 1 is designed as a detachable structure, which is convenient for later inspection and maintenance of the inside of the pyroelectric sensor body 1. The bottom part of the pyroelectric sensor body 1 is designed as a detachable structure. The splicing frame 401 of the disassembly component 4 is threadedly installed on the bottom of the pyroelectric sensor body 1 using the threaded tube 402, and the splicing frame 401 and the power pins 403 are installed. The power pins 403 are grouped in twos, one group is the negative power pin, and the other group is the positive power pin. The installation is carried out through the signal Pin 5 is a negative power pin and a positive power pin for information connection processing. The bottom of the splicing frame 401 and the power pin 403 are provided with an anti-skid component 6, which is convenient for stably installing the splicing frame 401 of the pyroelectric sensor body 1 at the installation position. The positioning plate 601 can be locked to the bottom of the splicing frame 401 by passing the bolt 602 through the middle of the positioning plate 601. The outer surface of the splicing frame 401 is provided with an anti-sliding block 603, which increases the tightness between the installation object and the splicing frame 401, greatly improving the splicing frame 401 installation stability, avoid the splicing frame 401 in the process of installation, the two groups of power pins 403 are respectively inserted in the installation slot 604 of the positioning plate 601 for installation processing, through the top of the pyroelectric sensor body 1 is provided with a threaded groove 2, convenient for the cover 301 of the lens assembly 3 to be rotated and installed in the threaded groove 2 through the screw tube 303 for assembly, through the middle of the cover 301 is provided with a Fresnel lens 302, Fresnel lens 302 uses the special optical principle of the lens to produce an alternating "blind area" and "high sensitivity area" in front of the detector to improve its detection and receiving sensitivity, when someone walks in front of the lens, the infrared rays emitted by the human body continuously alternate from the "blind area" to the "high sensitivity area", so that the received infrared signal is input in the form of pulses that are strong and weak, thereby enhancing its energy amplitude, Fresnel lens 302 is a thin sheet engraved by concentric circles, which has the function of focusing incident light, and can also divide the detection area into light and dark areas, thereby improving the performance of the infrared pyroelectric sensor.

[0038] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An infrared pyroelectric sensor, comprising a pyroelectric sensor body (1), characterized in that: The top end of the pyroelectric sensor body (1) is provided with a thread groove (2), and a lens assembly (3) is installed at the top end of the thread groove (2); and a disassembly assembly (4) is provided at the bottom end of the pyroelectric sensor body (1); The disassembly assembly (4) comprises a splicing frame (401), a threaded tube (402) and a power pin (403); the splicing frame (401) is arranged at the bottom end of the pyroelectric sensor body (1), the top end of the splicing frame (401) is connected to the threaded tube (402), and the bottom end of the splicing frame (401) is connected to the power pin (403); The bottom end of the disassembly component (4) is connected to a signal pin (5); the bottom end of the signal pin (5) is installed with an anti-slip component (6).

2. The infrared pyroelectric sensor according to claim 1, characterized in that: The splicing frame (401) is connected to the threaded tube (402), and two groups of power pins (403) are provided.

3. The infrared pyroelectric sensor according to claim 1, characterized in that: The splicing frame (401) is a hollow structure, and the splicing frame (401) and the power pin (403) are fixedly connected.

4. The infrared pyroelectric sensor according to claim 1, characterized in that: The lens assembly (3) comprises a card cover (301), a Fresnel lens (302) and a screw tube (303); the card cover (301) is installed at the top end of the threaded groove (2), the Fresnel lens (302) is arranged in the middle of the card cover (301), and the screw tube (303) is connected to the bottom end of the card cover (301).

5. The infrared pyroelectric sensor according to claim 4, characterized in that: The card cover (301) is connected to the Fresnel lens (302), and the screw tube (303) is fixedly connected to the Fresnel lens (302).

6. The infrared pyroelectric sensor according to claim 1, characterized in that: The anti-slip assembly (6) comprises a positioning plate (601), bolts (602), an anti-sliding block (603) and an installation slot (604); the bottom end of the signal pin (5) is installed with a positioning plate (601), and bolts (602) are passed through a circle of the outer wall of the positioning plate (601); an anti-sliding block (603) is arranged in a circle inside the positioning plate (601); and installation slots (604) are opened on both sides of the middle of the positioning plate (601).

7. The infrared pyroelectric sensor according to claim 6, characterized in that: The positioning plate (601) forms a fixed structure with the anti-sliding block (603) through bolts (602), and two groups of mounting slots (604) are provided.

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