Anti-interference infrared receiver with infrared filtering function
By introducing a narrowband interference filter and lens into the infrared receiver, combined with the shielded signal line, the problem of infrared receiver susceptibility is solved, and the high precision and anti-interference ability is improved, ensuring stable reception of infrared signals in complex environments.
Patent Information
- Application Number
- CN202421972027.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-08-15
AI Technical Summary
Existing infrared receivers are susceptible to interference from other spectral signals, resulting in unstable signal processing and limited anti-interference ability, especially in complex electromagnetic environments.
A narrowband interference filter with a bandwidth of less than 50nm is used as an infrared filter, allowing only infrared signals with a central wavelength of 850nm to pass through, and combined with lenses and shielded signal lines to improve signal focus and anti-interference capabilities. The overall structure is designed as waterproof sealing to adapt to complex environments.
It significantly suppresses visible light and other infrared interference, improves the reception accuracy and anti-interference ability of infrared signals, and ensures stable and reliable reception of remote control infrared communication band signals in complex environments.
Smart Images
Figure CN223182154U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of infrared receiving devices, and particularly to an anti-interference infrared receiver with an infrared filtering function. Background Art
[0002] When the existing infrared receivers receive infrared signals, they are easily interfered by other spectral signals, resulting in unstable signal processing. At the same time, the anti-interference ability of traditional infrared receivers is limited and they are easily affected by the external electromagnetic environment. The present invention aims to improve the existing technology and provide a receiver with an infrared filtering function, which can effectively improve the receiving accuracy and anti-interference ability of specific infrared signals. Content of the Utility Model
[0003] The purpose of the utility model is to provide an anti-interference infrared receiver with an infrared filtering function. By introducing an infrared filter, the interference of other spectral signals is reduced, while maintaining high sensitivity to the target infrared signal. Preferably, the infrared filter is a narrowband interference filter with a bandwidth less than 50nm, which only allows infrared signals within the range of a central wavelength of 850nm (±20nm) to pass through, so as to effectively receive the infrared communication band of remote control devices and significantly suppress visible light and other infrared interferences.
[0004] The receiver design includes a plastic head, a metal bracket, an IC amplifier, a receiving diode chip, and a shielded signal wire. The overall structure is stable and has strong anti-interference ability.
[0005] In the receiver body, the output pin, the ground pin, and the power pin are respectively led out from one end of the metal bracket in a parallel arrangement, and a terminal loop is provided at the end for easy connection to an external system. The above-mentioned pins are fixed inside the plastic head through encapsulation to form a stable and closed signal transmission interface.
[0006] The IC amplifier and the receiving diode chip are connected by a metal wire and fixed on the metal bracket by solder joints to ensure stable signal transmission. The infrared filter is arranged in front of the receiving diode chip to filter infrared signals in non-target bands and only allow specific wavelengths to pass through. A lens is arranged between the infrared filter and the receiving diode chip for focusing the signal.
[0007] An amplifier placement groove and a chip placement groove are provided on the surface of the metal bracket for accommodating and fixing the IC amplifier and the receiving diode chip respectively, which is convenient for assembly. The "encapsulation" refers to the process of fixing and sealing the above-mentioned components inside the receiver body through a structure to ensure the stability and reliability of the overall structure.
[0008] The shielding signal wire is wound around the outside of the plastic head and connected to the external circuit through the conductive interface and the grounding interface, which is used to suppress external electromagnetic interference and improve the anti-interference performance of the receiver. The receiver body also adopts a waterproof structure to adapt to various complex environments. Description of the Drawings
[0009] Figure 1 FIG. is a schematic internal structure diagram of an anti-interference infrared receiver with an infrared filtering function proposed by the present utility model;
[0010] Figure 2 FIG. is a schematic external structure diagram of an anti-interference infrared receiver with an infrared filtering function proposed by the present utility model;
[0011] Figure 3 FIG. is a schematic diagram of the positional relationship among the internal receiving diode chip, infrared filter, and lens of an anti-interference infrared receiver with an infrared filtering function proposed by the present utility model
[0012] Legend: 1. Plastic head; 2. Metal bracket; 3. Output pin; 4. Ground wire pin; 5. Power supply pin; 6. IC amplifier; 7. Receiving diode chip; 8. Metal wire; 9. Shielding signal wire; 10. Terminal ring; 11. Amplifier placement groove; 12. Chip placement groove; 13. Solder joint; 14. Conductive interface; 15. Grounding interface; 16. Infrared filter; 17. Lens. Detailed Embodiment
[0013] In order to more clearly understand the above objects, features, and advantages of the present utility model, the present utility model will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0014] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.
[0015] The present utility model will be further described below with reference to the drawings and embodiments.
[0016] In one embodiment, the infrared receiver includes: a receiver body, a plastic head, a metal bracket, an IC amplifier, a receiving diode chip, an infrared filter, a lens, a shielding signal wire, a wire, and a pin assembly.
[0017] The output pin, the ground wire pin, and the power supply pin are parallelly led out from one end of the metal bracket through the encapsulation structure, and terminal rings are provided at the ends for easy connection to the external circuit system.
[0018] The infrared filter is disposed in front of the receiving diode chip and is used to allow only infrared light signals in a specific wavelength band to pass through, so as to filter out interfering spectra. The lens is located between the infrared filter and the chip and is used to focus the optical signal. The IC amplifier and the receiving diode chip are respectively installed in the amplifier mounting groove and the chip mounting groove on the surface of the metal bracket, and are connected to other components through metal wires.
[0019] The metal wire is connected to the metal bracket through a solder joint to ensure electrical stability. The above components are encapsulated inside the plastic head, and the overall structure is sealed and stable, with good environmental adaptability and anti-interference ability. The shielded signal wire is wound around the outside of the plastic head and is used to shield external electromagnetic interference. Conductive interfaces and grounding interfaces are provided at both ends thereof and are connected to the system ground wire.
[0020] In a preferred embodiment, the infrared filter (16) is a narrowband interference filter with a central wavelength of 850 nm and a bandwidth of less than 50 nm, which only allows the far-infrared remote control band to pass through, so as to improve the accuracy and selectivity of the received signal. This filter can be replaced according to the actual application scenario; for example, if it is necessary to adapt to different models of remote controls, interference filters with different central wavelengths can be selected.
[0021] In addition, the lens (17) is disposed between the infrared filter and the receiving diode chip and is used to focus the infrared signal, so as to improve the photoelectric conversion efficiency and anti-interference ability. The above structure together ensures that this infrared receiver can still work reliably under high-interference and complex lighting environments.
[0022] The entire receiver structure adopts a waterproof design, and the protective sealing treatment can effectively prevent external water vapor from invading, ensuring that the receiver can still work stably in a humid environment.
[0023] The present utility model is not limited to the above embodiments. Those skilled in the art can make various deformations or equivalent replacements without departing from the spirit and essence of the present utility model, and still should fall within the protection scope of the present utility model.
[0024] The above description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still belong to the protection scope of the technical solution of the present utility model.
Claims
1. An anti-interference infrared receiver with infrared filtering function, characterized in that, Comprising: A receiver body, the receiver body is provided with a plastic head (1) and a metal bracket (2) encapsulated at one end inside, and the other end of the metal bracket (2) leads out an output pin (3), a ground pin (4) and a power pin (5) at the same time; an IC amplifier (6) and a receiving diode chip (7), both are assembled on the surface of the metal bracket (2); a shielded signal wire (9), wound around the outside of the plastic head (1), for reducing external signal interference; an infrared filter (16), arranged before the receiving diode chip (7), for filtering infrared signals with a wavelength of 850nm ± 20nm; a lens (17), located between the infrared filter (16) and the receiving diode chip (7), for focusing the infrared signal; a metal wire (8), connecting the IC amplifier (6), the receiving diode chip (7) and other components, and fixed on the metal bracket (2) through a solder joint (13).
2. The anti-interference infrared receiver with infrared filtering function according to claim 1, characterized in that, The infrared filter (16) is a narrow-band interference filter with a bandwidth less than 50nm, and only allows infrared signals with a central wavelength of 850nm to pass through.
3. The anti-interference infrared receiver with infrared filtering function according to claim 1 or 2, characterized in that, The output pin (3), the ground pin (4) and the power pin (5) are parallel and aligned, and terminal loops (10) are provided at their ends.
4. The anti-interference infrared receiver with infrared filtering function according to claim 1, characterized in that, Amplifier placement grooves (11) and chip placement grooves (12) for respectively placing the IC amplifier (6) and the receiving diode chip (7) are provided on the surface of the metal bracket (2).
5. The anti-interference infrared receiver with infrared filtering function according to claim 1, wherein Solder joints (13) for welding the metal wire (8) are provided on the surface of the metal bracket (2).
6. The anti-interference infrared receiver with infrared filtering function according to claim 1, characterized in that, Both ends of the shielded signal wire (9) are a conductive interface (14) and a ground interface (15) respectively.
7. The anti-interference infrared receiver with infrared filtering function according to claim 1, characterized in that, The lens (17) is used for focusing the infrared signal transmitted from the infrared filter (16) to the receiving diode chip (7).
8. The anti-interference infrared receiver with infrared filtering function according to claim 1, characterized in that The receiver body adopts a waterproof design to adapt to various complex environments.
9. The anti-interference infrared receiver with infrared filtering function according to claim 1, wherein The infrared filter (16) can be replaced as needed to adapt to different infrared band requirements.