Sunlight interference resistant linear light beam smoke fire detector

Abstract

A sunlight interference-resistant linear light beam smoke fire detector is characterized in that the sunlight interference-resistant linear light beam smoke fire detector comprises a detector body, and a light filtering cover is arranged at the receiving end of the detector body; a circuit system is further arranged in the detector body and comprises a light receiving circuit used for receiving light rays, the light receiving circuit is connected with a signal conversion circuit used for converting light signals into electric signals, and the signal conversion circuit is connected with N stages of frequency selection circuits used for filtering light ray impurities. The utility model provides an infrared ray smoke alarm capable of effectively filtering sunlight interference, which is optimized in structure, can effectively filter various light interference signals, and can ensure that fire smoke particles can be correctly detected and an alarm can be timely given in a strong light environment.

Description

Technical Field

[0001] This utility model relates to the field of fire detectors, and in particular to a linear beam smoke detector that is resistant to sunlight interference. Background Technology

[0002] Traditional linear beam smoke detectors are frequently affected by sunlight and other ambient light during smoke detection, leading to false alarms and missed alarms. The false alarm and missed alarm rates increase significantly, especially in brightly lit environments. Therefore, developing a linear beam smoke detector resistant to sunlight and various ambient light interferences is of paramount importance. Summary of the Invention

[0003] To address the aforementioned issues, this technical solution provides a linear beam smoke detector that is resistant to sunlight interference.

[0004] To achieve the above objectives, the technical solution is as follows:

[0005] A linear beam smoke detector resistant to sunlight interference, characterized in that it includes a detector body, wherein the receiving end of the detector body is provided with a filter cover;

[0006] The detector body is also equipped with a circuit system, which includes a light receiving circuit for receiving light, the light receiving circuit is connected to a signal conversion circuit for converting light signals into electrical signals, and the signal conversion circuit is connected to an N-level frequency selection circuit for filtering light impurities.

[0007] In some embodiments, the signal conversion circuit is further connected to an automatic light flux control circuit for controlling the amount of light passing through the light receiving circuit.

[0008] In some embodiments, the detector body is further provided with a lens located inside the filter cover, and one side of the lens is provided with a channel for concentrating light.

[0009] In some embodiments, the channel is designed in a funnel shape.

[0010] The beneficial effects of this application are:

[0011] This application provides an infrared linear smoke detector that effectively filters out sunlight interference. Its structure is optimized and it can effectively filter various light interference signals, ensuring that it can correctly detect fire smoke particles and provide timely alarms in strong light environments. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0013] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0014] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of the circuit structure of an embodiment of the present invention. Detailed Implementation

[0016] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Please refer to Figure 1-3 As shown, a linear beam smoke detector resistant to sunlight interference includes a detector body, and the receiving end of the detector body is provided with a filter cover 1.

[0018] The detector body is also equipped with a circuit system, which includes a light receiving circuit for receiving light, the light receiving circuit is connected to a signal conversion circuit for converting light signals into electrical signals, and the signal conversion circuit is connected to an N-level frequency selection circuit for filtering light impurities.

[0019] A filter effectively filters natural light while allowing infrared light of specific wavelengths to pass through, significantly reducing the impact of natural light on the receiving signal. Simultaneously, a filtering circuit is incorporated, including a light-receiving circuit and an N-stage frequency-selective amplifier circuit. The light-receiving circuit converts the optical signal into an electrical signal, and the N-stage amplifier circuit filters and amplifies the electrical signal, thus completing the filtering process for the optical signal.

[0020] A light-transmitting cover that allows only specific wavelengths to pass through is installed on the front of the transmitter and receiver to perform initial filtering of sunlight and ambient light. After the light signal is received at the receiver, it undergoes secondary filtering by a filtering circuit. Through these two steps, the interference of sunlight and ambient light on the linear smoke detector can be minimized.

[0021] This application exhibits strong anti-interference capabilities. The dual filtering of interfering light by a filter mask and a high-pass filter significantly reduces the probability of false alarms caused by external light interference. It can be used in various strong ambient light and sunlight environments, thus improving fire safety.

[0022] In this embodiment, the signal conversion circuit is also connected to an automatic light flux control circuit for controlling the amount of light passing through the light receiving circuit.

[0023] In this embodiment, a lens 2 is also provided inside the detector body, located inside the filter cover 1, and a channel 3 for concentrating light is provided on one side of the lens 2.

[0024] In this embodiment, the channel 3 is designed in a trumpet shape, which is conducive to the concentration of light, so that it can be received by the sensor and transmitted to the light receiving circuit.

[0025] The above description is only a preferred embodiment of this application and is not intended to limit the scope of implementation of this application. Any other embodiments whose principles and basic structures are the same as or similar to those of this application are within the protection scope of this application.

Claims

1. A linear beam smoke detector resistant to sunlight interference, characterized in that, Includes a detector body, the receiving end of which is provided with a filter (1); The detector body is also equipped with a circuit system, which includes a light receiving circuit for receiving light, the light receiving circuit is connected to a signal conversion circuit for converting light signals into electrical signals, and the signal conversion circuit is connected to an N-level frequency selection circuit for filtering light impurities.

2. The linear beam smoke detector with anti-sunlight interference according to claim 1, characterized in that: The signal conversion circuit is also connected to an automatic light flux control circuit for controlling the amount of light passing through the light receiving circuit.

3. A linear beam smoke detector resistant to sunlight interference according to claim 1, characterized in that: The detector body is also provided with a lens (2) inside the filter (1), and a channel (3) for concentrating light is provided on one side of the lens (2).

4. A linear beam smoke detector resistant to sunlight interference according to claim 3, characterized in that: The channel (3) is designed in a trumpet shape.

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