A super large angle ceiling-mounted infrared sensor head

Abstract

The invention discloses an ultra-large-angle ceiling-mounted infrared sensor head, comprising a mounting seat and a focusing shell, wherein a PIR infrared probe is mounted in the focusing shell, and a primary reflector is pasted in the convex surface of the focusing shell; a circle of secondary reflectors is arranged on the outer periphery of the PIR infrared probe, and a plurality of focusing convex points are distributed on the inner wall of the focusing shell; the mounting seat is connected with a mounting plate through a connecting shaft, and the connecting shaft comprises an outer shaft and an inner shaft, and an electric telescopic rod is mounted on the mounting plate in the inner shaft, and the output end of the electric telescopic rod is welded and fixed to the mounting seat; the invention utilizes the primary reflector and the secondary reflector to optically reflect the infrared rays emitted by the PIR infrared probe twice, and then combines the focusing of the focusing convex points on the focusing shell to focus and collect external infrared signals, and utilizes the technologies of "direct emission + focusing" and "secondary optical reflection + focusing" to solve the problem of small emission angle of a single infrared probe, and the product cost is low, and can be widely used in large indoor venues, indoor parking lots and other places.

Description

Technical Field

[0001] The invention relates to the technical field of sensors, in particular to an ultra-large-angle ceiling-mounted infrared sensor head. Background Art

[0002] Infrared rays are invisible rays that have a wavelength of 0.76 to 400 microns in the spectrum. All substances above absolute zero (-273.15°C) can produce infrared rays, which are called heat rays in modern physics. Infrared sensors are developed based on the principle of infrared reflection. When a part of a person's hand or body is in the infrared area, the infrared rays emitted by the infrared transmitting tube are reflected to the infrared receiving tube by the hand or body of the human body. The signal processed by the microcomputer in the integrated circuit sends instructions to control the switch. Through human radiation, various lamps, burglar alarms, automatic doors and other equipment can be automatically and quickly turned on.

[0003] At present, the sensing angle of the ceiling-mounted infrared sensor probe is only about 129 degrees. Usually, the ceiling installation height is about 2.5 meters, and its maximum sensing radius is only about 4 meters. When using the infrared sensor probe for detection, the detection range is small, and multiple sensor probes are required to cooperate to achieve comprehensive detection in the area, which is inconvenient to use. Summary of the invention

[0004] The purpose of the present invention is to provide a ceiling-mounted infrared sensor head with an ultra-large angle to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an ultra-large-angle ceiling-mounted infrared sensor head, comprising a mounting seat and a focusing shell, wherein the focusing shell is a hollow structure of a hemisphere, and its plane is fixedly mounted on the mounting seat; a PIR infrared probe is mounted in the focusing shell, and a primary reflector is pasted in a convex surface of the focusing shell away from the mounting seat, wherein the primary reflector is an arc surface structure arched toward the direction of the PIR infrared probe, and the arched surface of the primary reflector is set as a first reflection layer;

[0006] A circle of secondary reflectors is arranged on the periphery of the PIR infrared probe, the side of the secondary reflector facing away from the mounting seat is a concave arc surface structure, the concave surface of the secondary reflector is arranged as a second reflection layer, and the inner wall of the focusing housing is covered with a plurality of focusing convex points;

[0007] The side of the mounting seat away from the focusing shell is connected to the mounting plate through a connecting shaft, and the mounting plate is installed on the ceiling through fixing bolts. The connecting shaft includes an outer shaft and an inner shaft. The outer shaft is welded and fixed to the mounting seat, and the inner shaft is fixedly welded to the mounting plate. A slide groove is symmetrically arranged on both side walls of the inner shaft. A sliding block is arranged at one end of the outer shaft away from the mounting seat, which vertically passes through the slide groove and is inserted into the inner shaft. One end of the sliding block in the inner shaft is connected to a limit block. An electric telescopic rod is installed on the mounting plate in the inner shaft, and the output end of the electric telescopic rod is welded and fixed to the mounting seat.

[0008] As a preferred solution of the present invention, the PIR infrared probe and the secondary reflector are fixed on the mounting base.

[0009] As a preferred solution of the present invention, the focusing shell and the focusing protrusion are both made of PE material.

[0010] As a preferred solution of the present invention, the outer shaft and the inner shaft are both hollow tubular structures with openings at both ends.

[0011] As a preferred solution of the present invention, a control button and a power socket of the electric telescopic rod are arranged on the mounting plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention utilizes the first reflection layer on the primary reflector and the second reflection layer on the secondary reflector to optically reflect the infrared rays emitted by the PIR infrared probe twice, and then combines the focusing of the focusing convex points on the focusing shell to focus and collect external infrared signals. The technology of "direct emission + focusing" and "secondary optical reflection + focusing" is used to solve the problem of small emission angle of a single infrared probe. The product cost is low and can be widely used in large indoor venues, indoor parking lots and other places.

[0014] 2. The present invention fixes the mounting base on the ceiling through a mounting plate by setting a connecting shaft with a telescopic structure. The connecting shaft is set as a double-layer structure. The outer sleeve slides on the inner shaft. The height of the PIR infrared probe on the ceiling can be conveniently adjusted by the telescopic drive of the electric telescopic rod in the inner shaft. The flexibility is strong and it is convenient to meet the needs of different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a reflection schematic diagram of the primary reflector and the secondary reflector of the present invention;

[0017] Figure 3 It is a schematic diagram of the sensing range of the present invention;

[0018] Figure 4 It is a schematic diagram of the specific structure of the connecting shaft of the present invention;

[0019] Figure 5 It is a schematic structural diagram of the slide groove on the inner shaft of the present invention.

[0020] In the figure: 1. Mounting base; 2. Focusing shell; 3. Ceiling; 4. PIR infrared probe; 5. Primary reflector; 6. First reflecting layer; 7. Secondary reflector; 8. Second reflecting layer; 9. Focusing convex point; 10. Center line; 11. Energy detection line reflected by secondary reflection; 12. Connecting shaft; 13. Mounting plate; 14. Fixing bolt; 15. Outer shaft; 16. Inner shaft; 17. Slide groove; 18. Sliding block; 19. Limit block; 20. Electric telescopic rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example 1: Please refer to Figure 1-5The present invention provides a technical solution: an ultra-large-angle ceiling-mounted infrared sensor head, comprising a mounting seat 1 and a focusing shell 2, wherein the focusing shell 2 is a hemispherical hollow structure, and its plane is fixedly mounted on the mounting seat 1; a PIR infrared probe 4 is mounted in the focusing shell 2, and a primary reflector 5 is pasted in a convex surface of the focusing shell 2 away from the mounting seat 1, and the primary reflector 5 is an arc surface structure arched toward the direction of the PIR infrared probe 4, and the arched surface of the primary reflector 5 is set as a first reflection layer 6;

[0025] The PIR infrared probe 4 is provided with a circle of secondary reflectors 7 on its outer periphery. The side of the secondary reflector 7 facing away from the mounting seat 1 is a concave arc surface structure. The concave surface of the secondary reflector 7 is provided as a second reflective layer 8. The inner wall of the focusing housing 2 is covered with a plurality of focusing convex points 9.

[0026] The side of the mounting seat 1 away from the focusing housing 2 is connected to the mounting plate 13 through a connecting shaft 12, and the mounting plate 13 is installed on the ceiling 3 through fixing bolts 14. The connecting shaft 12 includes an outer shaft 15 and an inner shaft 16. The outer shaft 15 is welded and fixed on the mounting seat 1, and the inner shaft 16 is fixed and welded on the mounting plate 13. A slide groove 17 is symmetrically arranged on both side walls of the inner shaft 16. A slider 18 is arranged at one end of the outer shaft 15 away from the mounting seat 1, which vertically passes through the slide groove 17 and is inserted into the inner shaft 16. One end of the slider 18 in the inner shaft 16 is connected to a limit block 19. An electric telescopic rod 20 is installed in the inner shaft 16 on the mounting plate 13, and the output end of the electric telescopic rod 20 is welded and fixed to the mounting seat 1.

[0027] Furthermore, the PIR infrared probe 4 and the secondary reflector 7 are fixed on the mounting base 1 .

[0028] Furthermore, the focusing housing 2 and the focusing protrusion 9 are both made of PE material.

[0029] Furthermore, the outer shaft 15 and the inner shaft 16 are both hollow tubular structures with openings at both ends.

[0030] Furthermore, the mounting plate 13 is provided with a control button and a power socket of the electric telescopic rod 20 .

[0031] Working principle: a part of the infrared rays emitted by the PIR infrared probe 4 penetrates directly in the form of the center line 10, a part is emitted along the side of the focusing shell 2, and another part first hits the first reflection layer 6 of the primary reflector 5 for a first reflection. The infrared rays after the first reflection hit the second reflection layer 8 of the secondary reflector 7 for a second reflection. The infrared rays after the second reflection are emitted from the side of the focusing shell 2. At this time, compared with the original rays, the angle between the second reflected rays and the center line 10 becomes larger, thereby increasing its detection range; the inner wall of the focusing shell 2 is covered with a number of focusing convex points 9, which are used to collect the detected external infrared signals and provide product 0 and 1 signals for judgment.

[0032] The electric telescopic rod 20 is connected to an external circuit through a power socket arranged on the mounting plate 13, and the telescopic length of the electric telescopic rod 20 is controlled by a control button, so that the outer sleeve slides on the inner shaft, and the height of the PIR infrared probe on the ceiling 3 can be conveniently adjusted, which has strong flexibility and is convenient for meeting the requirements of different heights.

[0033] Embodiment 2: The installation height of the common ceiling-mounted infrared probe is about 2.5 meters. This solution takes the ceiling-mounted installation height of 2.5 meters as an example. Figure 3 The minimum sensing distance radius of this product is 1-1.5 meters, and the maximum sensing distance radius is about 10 meters, which greatly increases the sensing range of the infrared sensing probe.

[0034] The present invention utilizes the first reflection layer on the primary reflector and the second reflection layer on the secondary reflector to optically reflect the infrared rays emitted by the PIR infrared probe twice, and then combines the focusing of the focusing convex points on the focusing shell to focus and collect external infrared signals. The technology of "direct emission + focusing" and "secondary optical reflection + focusing" is used to solve the problem of small emission angle of a single infrared probe. The product cost is low and can be widely used in large indoor venues, indoor parking lots and other places.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ceiling-mounted infrared sensor head with a large angle, characterized in that: The invention comprises a mounting seat (1) and a focusing shell (2), wherein the focusing shell (2) is a hollow hemispherical structure, and its plane is fixedly mounted on the mounting seat (1); a PIR infrared probe (4) is mounted in the focusing shell (2), and a primary reflector (5) is pasted in a convex surface of the focusing shell (2) away from the mounting seat (1); the primary reflector (5) is a circular arc curved surface structure arched in the direction of the PIR infrared probe (4), and the arched surface of the primary reflector (5) is arranged as a first reflective layer (6); A circle of secondary reflectors (7) are arranged on the outer periphery of the PIR infrared probe (4); a surface of the secondary reflector (7) facing away from the mounting seat (1) is a concave arc curved surface structure; the concave surface of the secondary reflector (7) is arranged as a second reflective layer (8); and a plurality of focusing convex points (9) are distributed on the inner wall of the focusing housing (2); The side of the mounting seat (1) away from the focusing housing (2) is connected to the mounting plate (13) through a connecting shaft (12); the mounting plate (13) is mounted on the ceiling (3) through fixing bolts (14); the connecting shaft (12) comprises an outer shaft (15) and an inner shaft (16); the outer shaft (15) is welded and fixed on the mounting seat (1); the inner shaft (16) is fixed and welded on the mounting plate (13); a slide groove (17) is symmetrically arranged on both side walls of the inner shaft (16); a slider (18) is arranged at one end of the outer shaft (15) away from the mounting seat (1) and vertically passes through the slide groove (17) and is inserted into the inner shaft (16); one end of the slider (18) in the inner shaft (16) is connected to a limit block (19); an electric telescopic rod (20) is installed in the inner shaft (16) on the mounting plate (13); the output end of the electric telescopic rod (20) is welded and fixed to the mounting seat (1); The PIR infrared probe (4) and the secondary reflector (7) are fixed on the mounting base (1); the focusing shell (2) and the focusing convex point (9) are both made of PE material; the outer shaft (15) and the inner shaft (16) are both hollow tubular structures with openings at both ends; and the mounting plate (13) is provided with a control button and a power socket of the electric telescopic rod (20).

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