CN219514160U - Monitoring device - Google Patents

Abstract

The utility model discloses a monitoring device, comprising: the shell is provided with an installation cavity and a through hole, and the through hole is communicated with the installation cavity; the infrared detection assembly comprises a pyroelectric infrared sensor, a Fresnel lens and an optical filter, wherein the optical filter is positioned between the pyroelectric infrared sensor and the Fresnel lens, the pyroelectric infrared sensor is positioned in the mounting cavity and faces the through hole, the Fresnel lens is arranged on the outer side wall of the shell and covers the through hole, and the optical filter is arranged on the inner side wall of the shell in a sealing manner and covers the through hole. The monitoring equipment disclosed by the utility model improves the waterproof performance.

Description

Monitoring device

Technical Field

The utility model relates to the technical field of security protection, in particular to monitoring equipment.

Background

The existing part of monitoring equipment has a humanoid monitoring function, and the function realizes that the pyroelectric infrared 0 sensor and the Fresnel lens are matched with each other. However, since the fresnel lens material is of high density

Polyethylene (High Density Polyethylen, HDPE), which is difficult to bond with glue or miscible with plastic materials, makes the waterproofing of fresnel lenses unreliable. Along with the increase of the service time of the monitoring equipment, the waterproof failure can be caused, and the normal operation of the monitoring equipment is affected.

Disclosure of Invention

The utility model provides monitoring equipment, which aims to solve the technical problems that a Fresnel lens material in the monitoring equipment is difficult to bond with glue or dissolve with a plastic material mutually, so that the Fresnel lens is unreliable in waterproof, waterproof failure is caused, and the normal operation of the equipment is affected.

In order to solve the above technical problems, the present utility model provides a monitoring device, including: the shell is provided with a mounting cavity and a through hole, and the through hole is communicated with the mounting cavity; infrared detection assembly including pyroelectric

The filter is positioned between the pyroelectric infrared sensor and the Fresnel lens, the pyroelectric infrared sensor is positioned in the mounting cavity and faces the through hole, the Fresnel lens is arranged on the outer side wall of the shell and covers the through hole, and the filter is arranged on the side wall of the shell and covers the through hole in a sealing mode.

And 5, the optical filter is a silica glass optical filter.

Wherein the filter is a passive infrared filter.

Wherein, the sunken first sunken groove that is provided with of casing inside wall, first sunken groove and through-hole intercommunication, the tank bottom size in first sunken groove is greater than the through-hole size, and the light filter seals to be fixed in the first sunken inslot.

The optical filter is fixed in the first concave groove through fixing glue.

Wherein, supervisory equipment includes the decorative cover, and fresnel lens periphery extension is provided with extension, and the decorative cover crimping is in the extension.

Wherein, the concave second sunken groove that is provided with of casing surface, second sunken groove and through-hole intercommunication, the tank bottom size in second sunken groove is greater than the through-hole size, and extension sets up in second sunken groove, decorates the lid and sets up in the casing surface to press bond in extension.

The decorative cover is detachably arranged on the outer surface of the shell, and one side surface of the decorative cover, which is far away from the shell, is flush with one side surface of the Fresnel lens, which is far away from the through hole.

The outer side wall of the shell is provided with a third concave groove which is communicated with the through hole, the bottom size of the third concave groove is larger than that of the through hole, and the optical filter is fixed in the third concave groove in a sealing mode.

Wherein, fresnel lens can dismantle the connection in casing lateral wall.

The beneficial effects of the utility model are as follows: unlike the prior art, the utility model provides a monitoring device which comprises a shell and an infrared detection assembly. The housing is formed with a mounting cavity and a through hole. The through hole is communicated with the mounting cavity. The infrared detection component comprises a pyroelectric infrared sensor, a Fresnel lens and an optical filter. The optical filter is positioned between the pyroelectric infrared sensor and the Fresnel lens. The pyroelectric infrared sensor is located in the mounting cavity and faces the through hole. The Fresnel lens is arranged on the outer side wall of the shell and covers the through hole. The optical filter is arranged on the inner side wall of the shell in a sealing way and covers the through hole. By arranging the interference filter between the pyroelectric infrared sensor and the Fresnel lens, external environment liquid and the like can be prevented from directly entering the mounting cavity, the waterproof effect is achieved, and the waterproof performance of the monitoring equipment is further improved; moreover, the filter can allow the infrared wave bands of the pyroelectric infrared sensor to pass, and cannot allow the wave bands of light, sunlight, other infrared radiation and the like to pass, so that false alarm of the pyroelectric infrared sensor is reduced.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic cross-sectional view of a partial area of an embodiment of a monitoring device according to the present utility model;

fig. 2 is a schematic structural view of another embodiment of the monitoring device of the present utility model.

Reference numerals: 10. monitoring equipment; 1. a housing; 11. a mounting cavity; 12. a through hole; 13. a first concave groove; 14. a second concave groove; 15. a third concave groove; 2. an infrared detection assembly; 21. a pyroelectric infrared sensor; 22. a Fresnel lens; 221. an extension; 23. a light filter; 3. a decorative cover; 4. a circuit board; 5. and (5) fixing glue.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The monitoring device provided by the utility model is described in detail below with reference to the embodiments.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic cross-sectional view of a partial area of an embodiment of a monitoring apparatus according to the present utility model; fig. 2 is a schematic structural view of another embodiment of the monitoring device of the present utility model. The present utility model provides a monitoring device 10. The monitoring device 10 comprises a housing 1 and an infrared detection assembly 2. The infrared detection assembly 2 includes a pyroelectric infrared sensor 21 and a fresnel lens 22. The monitoring device 10 can have a humanoid monitoring function through the infrared detection assembly 2, and the principle is as follows: pyroelectric infrared (Passive Infrared Ray, PIR) sensor 21 is capable of converting infrared signal variations over a range of wavelengths into electrical signals. The fresnel lens 22 generates an alternating "blind zone" and "high sensitivity zone" in front of the pyroelectric infrared sensor 21 by using the special optical principle of the lens to improve its detection receiving sensitivity. When a human body passes in front of the Fresnel lens 22, infrared rays emitted by the human body continuously and alternately enter a 'high-sensitivity zone' from a 'blind zone', so that the received infrared signals are input in the form of a pulse which is negligent and negligent, and the energy amplitude of the infrared signals is enhanced. Namely, in the warning area of the infrared detection assembly 2, when no human body moves, the pyroelectric infrared sensor 21 senses only background temperature; when a human body enters the guard zone, a difference signal between the temperature of the human body and the background temperature is sensed by the pyroelectric infrared sensor 21 through the Fresnel lens 22. Therefore, the basic concept of infrared detection of the infrared detection assembly 2 is to sense the difference in temperature between the moving object and the background object.

Because the fresnel lens 22 material is high density polyethylene (High Density Polyethylen, HDPE), it is difficult to bond with glue or to be miscible with plastic materials, making the fresnel lens 22 water-proof unreliable. As the service life of the monitoring device 10 increases, waterproof failure can be caused, which affects the normal operation of the device. Thus, in the present embodiment, the housing 1 is formed with the mounting chamber 11 and the through hole 12. The through hole 12 is communicated with the mounting cavity 11 and is used for mounting the infrared detection assembly 2. The pyroelectric infrared sensor 21 is located in the mounting chamber 11 with the pyroelectric infrared sensor 21 facing the through hole 12. The fresnel lens 22 is disposed on the outer side wall of the housing 1, and the fresnel lens 22 covers the through hole 12. The pyroelectric infrared sensor 21 is used for detecting and receiving the infrared radiation focused by the fresnel lens 22 and converting the infrared radiation into a weak voltage signal. The filter 23 can be used for the passage of a preset wavelength. The preset wavelength range is not limited, and the infrared band received by the pyroelectric infrared sensor 21 may be passed.

By arranging the optical filter 23 between the pyroelectric infrared sensor 21 and the Fresnel lens 22, external environment liquid and the like can be prevented from directly entering the installation cavity 11, the waterproof effect is achieved, and the waterproof performance of the monitoring equipment 10 is improved; and the optical filter 23 can allow the infrared wave band of the pyroelectric infrared sensor 21 to pass, but not allow the wave bands of light, sunlight, other infrared radiation and the like to pass, so that false alarm of the pyroelectric infrared sensor 21 is reduced.

The optical filter 23 may be fixed on the housing 1 in a sealing manner, such as by fixing the optical filter on the housing 1 with a fixing adhesive 5, a sealing member (not shown), etc., so as to realize a sealing connection between the optical filter 23 and the housing 1, thereby improving the waterproof performance of the monitoring device 10 and further improving the reliability of the monitoring device 10. In the process that the optical filter 23 is fixed on the shell 1 through the fixing glue 5, the surface of the optical filter 23 needs to be connected and matched with the fixing glue 5. Therefore, in order to enhance the stability of the optical filter 23 connected to the case 1 through the fixing glue 5, the optical filter 23 may be made of a silica gel glass sheet (not illustrated). The silica gel glass sheet is fixed with the shell 1 through the fixing glue 5, so that the sealing performance between the silica gel glass sheet and the shell 1 is realized. In addition, the fixing glue 5 may be, but is not limited to, a shadowless glue.

In the actual process, because the detection band range of the pyroelectric infrared sensor 21 is large, in order to further satisfy the human-shaped monitoring function of the monitoring device 10, the optical filter 23 is a passive infrared ray Passive Infrared Ray, and a PIR optical filter (not shown in the figure). Because the infrared central wavelength of human body radiation is 9-10 um, the preset wavelength range of the passive infrared filter is 6-10 um, and the requirement of human body infrared detection is just met, so that the monitoring equipment 10 can realize the humanoid monitoring function. Thus, the passive infrared filter can suppress strong light interference and reduce erroneous information from the pyroelectric infrared sensor 21. Wherein the passive infrared filter is a silica glass filter.

The filter 23 may be disposed on the inner side wall of the housing 1 or the outer surface of the housing 1, and the specific location is not limited. As in the first embodiment of the monitoring device 10, as shown in fig. 1, the optical filter 23 is sealingly fixed in the inner sidewall of the housing 1. The inner side wall of the housing 1 is concavely provided with a first concave groove 13. The optical filter 23 is fixed in the first concave groove 13 in a sealing way, so that the contact area between the optical filter 23 and the shell 1 is increased, and the strength of the optical filter 23 is improved. The first concave groove 13 is communicated with the through hole 12, and meanwhile, the groove bottom size of the first concave groove 13 is larger than the size of the through hole 12, so that the inner side wall of the shell 1 can limit the optical filter 23, and the optical filter 23 is convenient to install and fix; at the same time, the filter 23 can also be made to completely block the through hole 12.

Thus, by providing the optical filter 23 in the first concave groove 13, not only the contact area between the optical filter 23 and the housing 1 is increased, but also the installation of the optical filter 23 is facilitated, the installation efficiency is improved, and the through hole 12 can be shielded.

In one embodiment, the optical filter 23 is fixed in the first recess 13 by the fixing adhesive 5. Sealing performance between the optical filter 23 and the first concave groove 13 is improved through the fixing adhesive 5, waterproof performance of the monitoring equipment 10 is improved, and use reliability of the monitoring equipment 10 is further improved. The fixing glue 5 may be disposed at the bottom of the first recess 13 and on the wall of the recess, so as to increase the contact area between the fixing glue 5 and the optical filter 23, and further improve the sealing performance.

In a specific embodiment, the monitoring device 10 comprises a decorative cover 3. The decorative cover 3 plays a decorative role, so that the monitoring device 10 is more attractive. The fresnel lens 22 is provided with an extension 221 extending around the periphery thereof. The extension 221 provides a press-fit location for the cosmetic cover 3. When the decorative cover 3 is disposed on the outer surface of the housing 1, the decorative cover 3 can be press-bonded to the extension 221, thereby achieving fixation and installation of the fresnel lens 22.

Specifically, the outer surface of the housing 1 is concavely provided with a second concave groove 14. The extension 221 is disposed in the second concave groove 14, increasing the contact area of the fresnel lens 22 with the housing 1. The second concave groove 14 is communicated with the through hole 12, and the groove bottom size of the second concave groove 14 is larger than the through hole 12, so that the Fresnel lens 22 can be limited on the outer surface of the shell 1, and the Fresnel lens 22 is convenient to install and fix; meanwhile, the fresnel lens 22 can be entirely covered on the through-hole 12. When the decorative cover 3 is disposed on the outer surface of the housing 1, the decorative cover 3 is pressed against the extension 221, so as to fix and mount the fresnel lens 22. By the mutual cooperation of the decorative cover 3, the extension part 221 and the second concave groove 14, the convenience of fixing the Fresnel lens 22 is improved, and the assembly is simple.

Further, the decorative cover 3 is detachably arranged on the outer surface of the shell 1, so that the decorative cover 3 is convenient to mount and dismount. Such as decorative cover 3, may be attached to housing 1 by, but not limited to, a securing glue 5, snaps, screws, or ultrasonic welding, among others. When the decorative cover 3 is arranged on the outer surface of the shell 1, one side surface of the decorative cover 3 far away from the shell 1 and one side surface of the Fresnel lens 22 far away from the through hole 12 are flush, so that the decorative effect of the decorative cover 3 is improved, the surface of the monitoring equipment 10 is smoother, and the attractiveness of the monitoring equipment 10 is improved.

In a second embodiment of the monitoring device 10, as shown in fig. 2, the optical filter 23 is sealingly fixed to the outer surface of the housing 1. The fresnel lens 22 is detachably attached to the outer side wall of the housing 1. Such as the inner side wall of the housing 1 is concavely provided with a third recess groove 15. The optical filter 23 is fixed in the third concave groove 15 in a sealing way, so that the contact area between the optical filter 23 and the shell 1 is increased. The third concave groove 15 is communicated with the through hole 12, and meanwhile, the groove bottom size of the third concave groove 15 is larger than the through hole 12, so that the Fresnel lens 22 can be limited at the position of the shell 1 of the third concave groove 15, and the Fresnel lens 22 is convenient to install and fix; meanwhile, the fresnel lens 22 can be entirely covered at the through-hole 12. By arranging the optical filter 23 in the third concave groove 15, the waterproof performance is improved, and meanwhile strong light interference can be restrained, and the possibility of false alarm is reduced.

In the actual process, the fresnel lens 22 is pressed against the outer surface of the housing 1 through the decorative cover 3, so that the fresnel lens 22 is fixed, and the fresnel lens 22 can be connected with the housing 1 through clamping, locking, welding and other modes. In one embodiment, the fresnel lens 22 is locked to the outer surface of the casing 1 by a fixing member (not shown), so that the fresnel lens 22 is fixed. The fixing member may be a screw or the like, and is not limited herein. In another embodiment, the Fresnel lens 22 is fixed to the outer surface of the housing 1 by welding. Optionally, the fresnel lens 22 is secured to the outer surface of the housing 1 by ultrasonic welding.

In an embodiment, the monitoring device 10 further comprises a circuit board 4. The circuit board 4 is locked inside the housing 1 by a fixing member and is located in the mounting cavity 11. Wherein the pyroelectric infrared sensor 21 is fixed to the circuit board 4.

Compared with the prior art, the monitoring equipment comprises a shell and an infrared detection assembly. The housing is formed with a mounting cavity and a through hole. The through hole is communicated with the mounting cavity. The infrared detection component comprises a pyroelectric infrared sensor, a Fresnel lens and an optical filter. The optical filter is positioned between the pyroelectric infrared sensor and the Fresnel lens. The pyroelectric infrared sensor is located in the mounting cavity and faces the through hole. The Fresnel lens is arranged on the outer side wall of the shell and covers the through hole. The optical filter is arranged on the inner side wall of the shell in a sealing way, and covers the through hole for passing through the preset wavelength. By arranging the interference filter between the pyroelectric infrared sensor and the Fresnel lens, external environment liquid and the like can be prevented from directly entering the mounting cavity, the waterproof effect is achieved, and the waterproof performance of the monitoring equipment is further improved; moreover, the filter can allow the infrared wave bands of the pyroelectric infrared sensor to pass, and cannot allow the wave bands of light, sunlight, other infrared radiation and the like to pass, so that false alarm of the pyroelectric infrared sensor is reduced.

The terms "first", "second", "third" in the present utility model are used for descriptive purposes only and are not to be construed as indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. All directional indications (such as up, down, left, right, front, back … …) in embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. A process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. A monitoring device, comprising:

the shell is provided with a mounting cavity and a through hole, and the through hole is communicated with the mounting cavity;

the infrared detection assembly comprises a pyroelectric infrared sensor, a Fresnel lens and an optical filter, wherein the optical filter is positioned between the pyroelectric infrared sensor and the Fresnel lens, the pyroelectric infrared sensor is positioned in the installation cavity and faces the through hole, the Fresnel lens is arranged on the outer side wall of the shell and covers the through hole, and the optical filter is arranged on the side wall of the shell and covers the through hole in a sealing mode.

2. The monitoring device of claim 1, wherein the filter is a silicate glass filter.

3. The monitoring device of claim 1, wherein the filter is a passive infrared filter.

4. A monitoring device according to any one of claims 1-3, wherein the housing inner side wall is concavely provided with a first concave groove, the first concave groove is communicated with the through hole, the groove bottom size of the first concave groove is larger than the through hole size, and the optical filter is sealed and fixed in the first concave groove.

5. The monitoring device of claim 4, wherein the optical filter is secured within the first recess by a securing glue.

6. The monitoring device of claim 4, wherein the monitoring device comprises a decorative cover, an extension is provided on the periphery of the fresnel lens in an extending manner, and the decorative cover is in press-connection with the extension.

7. The monitoring device according to claim 6, wherein the housing outer surface is concavely provided with a second concave groove, the second concave groove is communicated with the through hole, a groove bottom size of the second concave groove is larger than the through hole size, the extension portion is disposed in the second concave groove, and the decorative cover is disposed on the housing outer surface and is press-connected to the extension portion.

8. The monitoring device of claim 7, wherein the decorative cover is detachably disposed on the outer surface of the housing, and a side of the decorative cover away from the housing is disposed flush with a side of the fresnel lens away from the through-hole.

9. A monitoring device according to any one of claims 1-3, wherein the housing outer side wall recess is provided with a third recess groove, the third recess groove communicates with the through hole, the groove bottom size of the third recess groove is larger than the through hole size, and the optical filter is sealed and fixed in the third recess groove.

10. The monitoring device of claim 9, wherein the fresnel lens is removably attached to the housing outer side wall.