Infrared sensor
By using Fresnel lenses and parameter adjustment potentiometers in the infrared sensor, the problems of sensing distance and accuracy were solved, enabling flexible parameter adjustment and a stable connection, thus improving the sensor's long-distance detection capability and adaptability.
Patent Information
- Application Number
- CN202520277244.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Existing infrared sensors have limitations in receiving infrared light, resulting in a limited sensing distance. They are also not accurate enough when detecting human movement at long distances, lack flexibility and adaptability, and affect the scope of application and user experience.
It employs a Fresnel lens to enhance infrared reception and allows users to adjust the sensor's sensitivity and operating parameters via a built-in parameter adjustment potentiometer. Combined with a robust clamping assembly and a detachable design, it improves adaptability and reliability.
It improves the accuracy and sensitivity of the sensor at long distances, enhances the sensor's adaptability and practicality, avoids false alarms or missed alarms, and improves the user experience.
Smart Images
Figure CN223796702U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of infrared sensor technology, specifically to an infrared sensor. Background Technology
[0002] Infrared sensors are developed based on the principle of infrared reflection. When a person's hand or part of their body is within the infrared range, the infrared rays emitted by the infrared emitter are reflected back to the infrared receiver due to the hand or body's obstruction. The signal, processed by a microcomputer within the integrated circuit, is then sent to the corresponding control device (such as a pulse solenoid valve or drive device), thereby controlling the relevant equipment.
[0003] Existing devices have some drawbacks in use. For example, traditional infrared sensors often have limitations in receiving infrared light, resulting in a limited sensing distance and insufficient accuracy in detecting human movement at long distances. This limits the application range of the sensors, especially in scenarios requiring large-scale monitoring or long-distance detection, where their performance is poor. Infrared sensors also lack sufficient flexibility in parameter adjustment. Users usually cannot freely adjust the sensor's sensitivity or other key operating parameters according to actual application scenarios and needs. This fixed parameter setting not only limits the adaptability and practicality of the sensor but may also lead to false alarms or missed alarms in different environments, thus affecting the overall performance of the sensor and the user experience. Utility Model Content
[0004] The purpose of this invention is to provide an infrared sensor that solves the problem that infrared sensors often have limitations in receiving infrared light, resulting in limited sensing distance and insufficient accuracy in detecting human movement at long distances.
[0005] This utility model provides the following technical solution: an infrared sensor, including a lower cover, an upper cover fixedly mounted on the top of the lower cover by self-tapping screws, a sensor cover detachably fixed on the top of the upper cover, a power PCB fixedly mounted on the inner side of the lower cover by screws, a terminal block and a parameter adjustment potentiometer fixedly mounted on the lower end face of the power PCB, a parameter adjustment knob screwed into the parameter adjustment potentiometer, a control PCB fixedly mounted on the upper end face of the power PCB, a pyroelectric infrared sensor and a relay fixedly mounted on the upper end face of the control PCB, a transparent cover snapped onto the lower end face of the lower cover, a wire through-hole opened on the side wall of the transparent cover, a wire through-hole opened on one side of the lower cover for wires to pass through, and a clamping component for fixing the wires provided on the lower end face of the lower cover.
[0006] As a preferred embodiment of the above technical solution, an annular auxiliary mounting plate is fixedly connected to the upper end face of the cover, and multiple protruding plates are fixedly arranged in an annular array on the outer side wall of the annular auxiliary mounting plate, and multiple clamping plates that cooperate with the protruding plates are fixedly arranged in an annular array on the bottom side wall of the inner side of the sensing cover.
[0007] As a preferred embodiment of the above technical solution, the clamping assembly includes a clamping seat fixedly connected to the lower end face of the lower cover, a fixing cylinder fixedly installed on the clamping seat by screws, a clamping plate fixedly connected between the two fixing cylinders, and a gap between the clamping plate and the clamping seat.
[0008] As a preferred embodiment of the above technical solution, spring hooks for fixing infrared sensors are detachably fixed on the opposite outer walls of the bottom of the lower cover.
[0009] As a preferred embodiment of the above technical solution, elastic blocks are fixedly connected to the opposite sides of the transparent cover, and slots adapted to the elastic blocks are symmetrically opened on both sides of the lower end face of the lower cover.
[0010] As a preferred embodiment of the above technical solution, the upper cover is provided with a preset hole adapted to the parameter adjustment knob.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] In this invention, the Fresnel lens significantly improves the infrared reception effect, which means that the sensor can detect human movement more accurately at a greater distance, improving the overall sensing sensitivity and reaction speed. The built-in parameter adjustment potentiometer allows users to adjust the sensor's sensitivity or other operating parameters according to actual needs. This flexibility enables the sensor to adapt to different application scenarios and requirements, improving its practicality and adaptability. Attached Figure Description
[0013] Figure 1 A schematic diagram of the overall exploded structure of an infrared sensor;
[0014] Figure 2 A schematic diagram of a partial explosion structure from a first-view perspective of an infrared sensor;
[0015] Figure 3 A schematic diagram of a second-view partial explosion structure of an infrared sensor;
[0016] Figure 4 A schematic diagram of a third-view partial explosion structure of an infrared sensor;
[0017] Figure 5 This is a schematic diagram of the overall structure of an infrared sensor.
[0018] In the diagram: 1. Induction cover; 2. Top cover; 3. Pyroelectric infrared sensor; 4. Control PCB; 5. Parameter adjustment knob; 6. Power PCB; 7. Spring hook; 8. Bottom cover; 10. Transparent cover; 101. Wire passage; 11. Relay; 12. Preset hole; 14. Terminal block; 15. Parameter adjustment potentiometer; 17. Clamping assembly; 171. Clamping base; 172. Fixing cylinder; 173. Clamping plate; 18. Annular auxiliary mounting plate; 19. Protruding plate; 20. Card plate; 22. Elastic card block; 23. Card slot; 801. Wire hole. Detailed Implementation
[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0020] Example
[0021] like Figures 1-5 As shown, this utility model provides a technical solution: an infrared sensor, including a lower cover 8, an upper cover 2 fixedly mounted on the top of the lower cover 8 by self-tapping screws, a sensor cover 1 (a Fresnel lens) detachably fixed on the top of the upper cover 2, a power PCB 6 fixedly mounted on the inner side of the lower cover 8 by screws, a terminal block 14 and a parameter adjustment potentiometer 15 fixedly mounted on the lower end face of the power PCB 6, a parameter adjustment knob 5 screwed into the parameter adjustment potentiometer 15, a preset hole 12 adapted to the parameter adjustment knob 5 for the parameter adjustment knob 5 to pass through the side wall of the upper cover 2, a control PCB 4 fixedly mounted on the upper end face of the power PCB 6, a pyroelectric infrared sensor 3 and a relay 11 fixedly mounted on the upper end face of the control PCB 4, a transparent cover 10 snapped onto the lower end face of the lower cover 8, a wire through hole 101 on the side wall of the transparent cover 10, and a wire through hole 801 for the wire to pass through on one side of the lower cover 8. The lower end face of the cover 8 is provided with a clamping assembly 17 for fixing the circuit. In actual use, the upper cover 2 is fixed to the top of the lower cover 8 with self-tapping screws to ensure that the two are tightly connected. Then, the sensing cover 1 (Fresnel lens) is fixed to the top of the upper cover 2 in a detachable manner. The Fresnel lens can enhance the infrared light reception effect and improve the sensitivity of the sensor. The power supply PCB6 is fixedly installed on the inside of the lower cover 8 with screws. The power supply PCB6 is responsible for providing a stable power supply to the entire sensor. On the lower end face of the power supply PCB6, the wiring terminal 14 and the parameter adjustment potentiometer 15 are fixedly installed. The wiring terminal 14 is used to connect the external power supply and signal line, while the parameter adjustment potentiometer 15 allows the user to adjust the sensitivity of the sensor or other parameters by rotating the knob. The control PCB4 is the core control component of the sensor, responsible for processing the signal from the pyroelectric infrared sensor 3 and controlling the switching state of the relay 11.
[0022] When the sensor is in working condition, the pyroelectric infrared sensor 3 will continuously detect changes in infrared radiation in the environment. Once the infrared radiation change of the target object reaches a preset threshold, the control PCB4 will trigger the switching action of the relay 11. The switching state change of the relay 11 can further control the operation of external devices, such as lights and alarms.
[0023] As one implementation method in this embodiment, such as Figure 2 and Figure 3 As shown, an annular auxiliary mounting plate 18 is fixedly connected to the upper end face of the cover 2. Multiple protrusions 19 are fixed in an annular array on the outer side wall of the annular auxiliary mounting plate 18. Multiple locking plates 20 that cooperate with the protrusions 19 are fixed in an annular array on the inner bottom side wall of the sensor cover 1. In specific use, the locking plates 20 on the sensor cover 1 are first inserted into the gap between two adjacent protrusions 19. Then, the sensor cover 1 is manually rotated so that the locking plates 20 are rotated to the bottom of the protrusions 19, thereby detachably fixing the sensor cover 1 to the cover 2.
[0024] As one implementation method in this embodiment, such as Figure 4 As shown, the clamping assembly 17 includes a clamping seat 171 fixedly connected to the lower end face of the lower cover 8. A fixing cylinder 172 is fixedly installed on the clamping seat 171 by screws. A clamping plate 173 is fixedly connected between the two fixing cylinders 172. There is a gap between the clamping plate 173 and the clamping seat 171. In actual use, the wire is passed through the wire hole 801 of the lower cover 8 and guided along the inner side wall of the lower cover 8 to the position of the clamping assembly 17. Then, the wire is placed in the gap between the clamping plate 173 and the clamping seat 171. Due to the solid connection between the clamping plate 173 and the clamping seat 171 and the compact space formed between them, the wire can be effectively clamped, thereby preventing the wire from shaking or falling off.
[0025] As one implementation method in this embodiment, such as Figure 1 and Figure 5 As shown, spring hooks 7 for fixing infrared sensors are detachably fixed on the opposite outer walls of the bottom of the lower cover 8. In actual use, the spring hooks 7 use the elastic force of the spring to firmly snap the infrared sensor onto the mounting surface. This fixing method is not only simple and effective, but also adaptable to mounting surfaces of different shapes and materials, thus improving the stability and reliability of the sensor.
[0026] As one implementation method in this embodiment, such as Figure 4As shown, elastic clips 22 are fixedly connected to opposite sides of the transparent cover 10. The lower end face of the lower cover 8 is symmetrically provided with slots 23 adapted to the elastic clips 22. Align the elastic clips 22 on the transparent cover 10 with the slots 23, and then manually press the transparent cover 10 so that the elastic clips 22 are engaged in the slots 23, thereby securing the transparent cover 10.
[0027] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.
Claims
1. An infrared sensor, comprising a lower cover (8), characterized in that: The top of the lower cover (8) is fixedly installed with the upper cover (2) by self-tapping screws. The top of the upper cover (2) is detachably fixed with the sensor cover (1). The inside of the lower cover (8) is fixedly installed with screws. The lower end face of the power PCB (6) is fixedly installed with the terminal block (14) and the parameter adjustment potentiometer (15). The parameter adjustment potentiometer (15) is screwed with the parameter adjustment knob (5). The upper end face of the power PCB (6) is fixedly installed with the control PCB (4). The upper end face of the control PCB (4) is fixedly installed with the pyroelectric infrared sensor (3) and the relay (11). The lower end face of the lower cover (8) is snapped and fixed with the transparent cover (10). The side wall of the transparent cover (10) is opened with a wire through hole (101). The lower cover (8) is opened with a wire through hole (801) for passing through the wire. The lower end face of the lower cover (8) is provided with a clamping component (17) for fixing the wire.
2. An infrared sensor according to claim 1, characterized in that: The upper end face of the cover (2) is fixedly connected to an annular auxiliary mounting plate (18). Multiple protrusions (19) are fixed in an annular array on the outer side wall of the annular auxiliary mounting plate (18). Multiple clamping plates (20) that cooperate with the protrusions (19) are fixed in an annular array on the inner bottom side wall of the sensor cover (1).
3. An infrared sensor according to claim 1, characterized in that: The clamping assembly (17) includes a clamping seat (171) fixedly connected to the lower end face of the lower cover (8). A fixing cylinder (172) is fixedly installed on the clamping seat (171) by screws. A clamping plate (173) is fixedly connected between the two fixing cylinders (172). There is a gap between the clamping plate (173) and the clamping seat (171).
4. An infrared sensor according to claim 1, characterized in that: The bottom cover (8) has spring hooks (7) for fixing the infrared sensor that are detachably fixed on the opposite outer walls of the bottom.
5. An infrared sensor according to claim 1, characterized in that: The transparent cover (10) is fixedly connected to elastic blocks (22) on opposite sides, and the lower cover (8) has symmetrical slots (23) on both sides of the lower end face that are adapted to the elastic blocks (22).
6. An infrared sensor according to claim 1, characterized in that: The upper cover (2) has a preset hole (12) adapted to the parameter adjustment knob (5).