Human body infrared induction sensor

Abstract

The utility model relates to the technical field of sensors, and discloses a human body infrared induction sensor, which solves the problems of environmental interference, identification distance limitation, static object detection, precision and sensitivity of the human body infrared induction sensor in the current market, and comprises a lower shell, the lower shell is connected with the upper shell in a clamped mode through a buckle, the lower shell is provided with a two-in-one PCB through screws, the upper shell is provided with a decoration ring through a buckle, the decoration ring is provided with a Fresnel lens through screws, the bottom of the upper shell is provided with a light gathering cover, and the bottom of a funnel-shaped groove of the light gathering cover is provided with an illuminance sensor. A pyroelectric infrared sensor is installed in the middle of the light gathering cover and the middle of the two-in-one PCB. According to the utility model, environmental interference can be avoided, limitation of identification distance is reduced, the application field is wide, effective detection of dynamic and static objects is realized, the precision and sensitivity are high, and no data difference is generated.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, in particular to a human body infrared induction sensor. Background Art

[0002] Human infrared sensors are used for anti-theft alarms, visitor notifications, etc. The principle is to convert the released charge into voltage output through an amplifier. Specifically, it is a device that can detect human infrared radiation and convert it into electrical signals. This type of sensor is usually used in security systems, automatic lighting, and energy management applications. When a human body is detected passing by and generating infrared radiation, the sensor generates an electrical signal. After the electrical signal is processed by the control circuit, it can be connected and interacted with other devices or systems through the output interface.

[0003] However, the human infrared sensing sensors currently on the market have the following defects:

[0004] Environmental interference: Human infrared sensors are sensitive to interference from other heat sources in the environment, which may lead to false alarms or misidentifications;

[0005] Recognition distance limitation: Some human infrared sensors have limited recognition distance, which may limit their application areas;

[0006] Static object detection: Human infrared sensors can usually only detect moving objects, but it is difficult to effectively identify static objects;

[0007] Accuracy and sensitivity: The accuracy and sensitivity of the human infrared sensor may vary due to differences in sensor quality and algorithm. Summary of the invention

[0008] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a human infrared sensing sensor, which effectively solves the problems of environmental interference, recognition distance limitation, static object detection, accuracy and sensitivity of the human infrared sensing sensors currently on the market.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a human infrared sensing sensor, comprising a lower shell, a spring clip is installed on the outside of the lower shell, the lower shell is clamped with an upper shell through a buckle, a two-in-one PCB board is installed on the lower shell through screws, a decorative ring is installed on the upper shell through a buckle, a Fresnel lens is installed on the decorative ring through screws, a condenser is installed at the bottom of the upper shell, a light intensity sensor is installed at the bottom of the funnel-shaped groove of the condenser, and a discharge infrared sensor is installed between the condenser and the two-in-one PCB board.

[0010] Preferably, two RJ interfaces for power supply required for transmitting and receiving infrared light are reserved on the lower shell.

[0011] Preferably, the lower shell is also provided with a mounting groove for mounting a spring clip, and the bottom of the lower shell is provided with two mounting holes perpendicular to each other.

[0012] Preferably, the two-in-one PCB board is equipped with an LED light for indicating the presence of a human body in an activity, and the light intensity sensor and the discharge infrared sensor are both attached to the surface of the two-in-one PCB board.

[0013] Preferably, the two-in-one PCB board is also provided with a small hole, and the condenser is fixed through the small hole.

[0014] Preferably, the outer edges of the upper shell are all arranged in arc shape.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In the work, the Fresnel lens is used to increase the field of view, eliminate interference, and enhance the detection distance, effectively collecting infrared radiation from the target being measured, thus solving the problem of false alarms and misidentifications caused by environmental interference;

[0017] The pyroelectric infrared sensor absorbs infrared radiation through pyroelectric materials and produces temperature changes, which in turn causes changes in the electrical potential on the surface of the material. The human infrared sensor detects changes in electrical potential to sense changes in surrounding infrared radiation, thereby detecting the presence and movement of human bodies or objects, and further detecting static objects.

[0018] The light intensity sensor converts light energy into electrical signals through photosensors, and then converts the electrical signals into usable digital signals through circuits and interfaces. It is used to measure and represent the light intensity in the environment. It can effectively solve the problems of environmental interference and recognition distance limitation, and avoid the problem of narrow application fields and short recognition distance caused by the limitation of recognition distance.

[0019] The RJ interface left on the lower shell can be used to provide the sensor module with the working voltage usually required for the power supply required for emitting and receiving infrared light. Other pins can also be used to transmit the data obtained by the sensor module, thereby solving the problem of differences in accuracy and sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the bottom structure of the utility model;

[0023] Figure 3 It is an explosion diagram of the utility model;

[0024] In the figure: 1. Fresnel lens; 2. Decorative ring; 3. Upper shell; 4. Spotlight; 5. Electrostatic infrared sensor; 6. Illuminance sensor; 7. Two-in-one PCB board; 8. Lower shell; 9. Spring clip. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] In this embodiment, Figure 1-3 Given,

[0027] The utility model comprises a Fresnel lens 1 which is fixed on a decorative ring 2 by screws. The Fresnel lens 1 increases the viewing angle, eliminates interference, enhances the detection distance, and effectively collects infrared radiation from the target to be detected. The Fresnel lens 1 utilizes the special optical principle of the lens to generate an alternating "blind area" and "high-sensitivity area" on the human infrared sensing sensor 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.

[0028] Then it is fixed to the upper shell 3 through the decorative ring 2, and the light intensity sensor 6 is fixed at the bottom of the funnel-shaped groove of the condenser 4. The light intensity sensor 6 converts light energy into electrical signals through photosensors, and then converts the electrical signals into usable digital signals through circuits and interfaces, which are used to measure and represent the light intensity in the environment. The outer edges of the upper shell 3 are all set in arcs, and the arc-shaped edges of the upper shell 3 will not cause significant damage when they come into contact with any object, and the safety is strong.

[0029] The condenser 4 is fixed under the upper shell 3 through an annular groove and fixed on the two-in-one PCB board 7 through a small hole. The pyroelectric infrared sensor 5 is sandwiched between the condenser 4 and the two-in-one PCB board 7. The condenser 4 enhances the performance of the human infrared sensing sensor. The pyroelectric infrared sensor 5 absorbs infrared radiation through pyroelectric materials and produces temperature changes, which in turn causes changes in the surface potential of the material. The LED light on the two-in-one PCB board 7 turns on and off to indicate the presence and activity of the human body. In addition, the program can also control the LED light on the two-in-one PCB board 7.

[0030] The two-in-one PCB board 7 is fixed to the lower shell 8 by screws, the upper shell 3 and the lower shell 8 are fastened by buckles, a spring clip 9 is left on the lower shell 8 for installation, and the RJ11 interface left on the lower shell 8 can be used to provide the sensor module with the working voltage usually required for the power supply required for the emission and reception of infrared light, and other pins can also be used to transmit the data obtained by the sensor module;

[0031] For example, the infrared sensor may detect the distance, temperature or other characteristics of an object and transmit this data to the RJ11 interface in the form of an analog signal. The receiving device can then convert the analog signal into a digital signal through a corresponding circuit and perform further processing and analysis. There are two mutually perpendicular mounting holes at the bottom of the lower shell 8, as well as a mounting slot for placing the spring card 9, which realizes a variety of installation methods.

[0032] Working principle:

[0033] When working, firstly, the Fresnel lens 1 is used to increase the field of view angle, eliminate interference, and enhance the detection distance, so as to effectively collect infrared radiation from the target to be measured. The focusing cover 4 is used to enhance the performance of the human infrared sensing sensor. The pyroelectric infrared sensor 5 absorbs infrared radiation through the pyroelectric material and produces temperature changes, which in turn causes the surface potential of the material to change. The human infrared sensor detects the potential change to realize the perception of the surrounding infrared radiation change, thereby realizing the detection of the existence and movement of the human body or object.

[0034] The light intensity sensor 6 converts light energy into electrical signals through photosensors, and then converts the electrical signals into usable digital signals through circuits and interfaces, which are used to measure and represent the light intensity in the environment, and can effectively solve the problems of environmental interference and identification distance limitation;

[0035] The RJ11 interface left on the lower shell 8 can be used to provide the sensor module with the power supply required for the working voltage usually required for the emission and reception of infrared light, and other pins can also be used to transmit the data obtained by the sensor module. For example, the infrared sensor may detect the distance, temperature or other characteristics of an object, and transmit these data to the RJ11 interface in the form of an analog signal. Then, the receiving device can convert the analog signal into a digital signal through the corresponding circuit, and further process and analyze it.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] 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 human infrared sensor, characterized in that: The invention comprises a lower shell (8), the outer part of which is provided with a spring clip (9), the lower shell (8) is connected to an upper shell (3) by means of a clip, the lower shell (8) is provided with a two-in-one PCB board (7) by means of screws, the upper shell (3) is provided with a decorative ring (2) by means of a clip, the decorative ring (2) is provided with a Fresnel lens (1) by means of screws, a condenser (4) is provided at the bottom of the upper shell (3), a light intensity sensor (6) is provided at the bottom of the funnel-shaped groove of the condenser (4), and a discharge infrared sensor (5) is provided between the condenser (4) and the two-in-one PCB board (7).

2. A human infrared sensor according to claim 1, characterized in that: The lower shell (8) has two RJ11 interfaces for supplying power required for transmitting and receiving infrared light.

3. The human infrared sensor according to claim 1, characterized in that: The lower shell (8) is also provided with a mounting groove for mounting a spring clip (9), and the bottom of the lower shell (8) is provided with two mounting holes perpendicular to each other.

4. The human infrared sensor according to claim 1, characterized in that: An LED light for indicating the presence of a human body in an activity is installed on the two-in-one PCB board (7), and the light intensity sensor (6) and the discharge infrared sensor (5) are both attached to the surface of the two-in-one PCB board (7).

5. The human infrared sensor according to claim 1, characterized in that: The two-in-one PCB board (7) is also provided with a small hole, and the condenser (4) is fixed through the small hole.

6. The human infrared sensor according to claim 1, characterized in that: The outer edges of the upper shell (3) are all arranged in the form of arcs.

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