Three-band infrared flame detector for marine environment

Abstract

The utility model relates to the technical field of flame detection, and discloses a three-waveband infrared flame detector for an offshore environment, which solves the problems in the background technology, and comprises a shell, a front end cover, a rear end wire outlet structure, a front sealing gasket, a rear end wire outlet structure and a rear sealing gasket, the sealing glass is mounted at the optical window of the front end cover and is arranged between the front sealing gasket and the middle sealing gasket; the front fixing support and the rear fixing support are fixed in the shell, and a circuit board is arranged between the front fixing support and the rear fixing support; the rear sealing ring is arranged at the rear end of the shell; the rear-end wire outlet structure comprises a wire outlet expansion plug and a wire outlet pipe screw, the rear-end wire outlet structure is used for cable sealing, and the marine fire disaster detector has the advantages that the marine fire disaster detection accuracy and reliability can be remarkably improved, false alarms and missing alarms are reduced, the detector can stably work in a severe marine environment, and the service life is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of flame detection technology, specifically a three-band infrared flame detector for marine environments. Background Technology

[0002] In the marine operating environment, there are many potential fire hazards on ships, such as fuel leaks and electrical faults, which can cause fires. Once a fire occurs, it can spread rapidly and have unimaginable consequences. Traditional flame detectors have many shortcomings in the complex marine environment. Factors such as the corrosiveness of seawater, humid air, strong sunlight, and the impact of waves can all affect the normal operation and service life of the detectors.

[0003] Conventional flame detectors are susceptible to environmental interference, resulting in false alarms or missed alarms. They cannot detect fires in a timely and accurate manner, making it difficult to meet the stringent requirements of marine fire safety. Therefore, we propose a three-band infrared flame detector for marine environments. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides the following technical solution: a three-band infrared flame detector for marine environments, comprising a housing, a front cover, and a rear cable exit structure.

[0005] A front sealing gasket is disposed between the front end cover and the housing;

[0006] A sealing glass is installed at the optical window of the front cover and is positioned between the front sealing gasket and the middle sealing gasket;

[0007] A front fixed bracket and a rear fixed bracket are fixed inside the housing, and a circuit board is provided between the front fixed bracket and the rear fixed bracket.

[0008] The rear sealing ring is located at the rear end of the housing;

[0009] The rear cable exit structure includes a cable exit plug and a cable exit tube screw. The rear cable exit structure is used for cable sealing and is connected to the rear end.

[0010] Three infrared optical filters in different bands are used for flame detection and background radiation detection;

[0011] An infrared detection element is set in correspondence with the infrared optical filter. A high-sensitivity, low-noise infrared detection element is selected, and it corresponds one-to-one with the optical filters of the three bands. The received infrared radiation signal is converted into an electrical signal to ensure effective capture of weak flame signals.

[0012] A signal processing circuit is used to process the electrical signals output by the infrared detection element.

[0013] Preferably, the three infrared optical filters of different bands correspond to the characteristic wavelength of the flame and two background reference wavelengths, respectively. One is used for flame detection, and the other two are used for background infrared radiation detection. By working together, the characteristic infrared band signal of the flame can be accurately screened out, which can effectively improve the selectivity and sensitivity of flame radiation and reduce the interference of other background radiation. The signal processing circuit includes amplification, filtering and analog-to-digital conversion modules. The signals of the three bands are analyzed and compared through specific algorithms to determine whether there is a flame, which can effectively reduce the false alarm rate.

[0014] Preferably, the front sealing gasket, the middle sealing gasket, and the rear sealing ring together constitute the sealing system of the detector, ensuring the detector's waterproof and dustproof performance in a marine environment.

[0015] Preferably, a shock-absorbing structure is provided between the front fixed bracket and the rear fixed bracket to reduce the impact of external impacts on the internal components of the detector.

[0016] Preferably, the cable expansion plug and the cable outlet screw are connected by threads and filled with sealing material, which enhances the reliability of the cable seal.

[0017] Preferably, the housing is made of high-strength, corrosion-resistant material, which is suitable for marine environments and improves the durability and reliability of the detector.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] During operation, three infrared optical filters of different wavelengths are first precisely installed in front of the optical lens according to design requirements, ensuring alignment between the filters and the optical axis of the detection element to guarantee accurate light transmission. The infrared detection element is then fixed in its corresponding position, ensuring a tight fit with the optical filters. Electrical connections are made to ensure stable signal transmission. Based on the designed circuit diagram, suitable electronic components are selected, soldered, and debugged on the circuit board to ensure normal circuit function and accurate processing of the signals output by the detection element. The assembled optical system, detection element, and signal processing circuit are then installed inside the housing, and the wiring of each part is securely connected. The housing is then sealed, and shock-absorbing devices are installed, completing the assembly of the entire detector. This significantly improves the accuracy and reliability of detecting marine fires, reduces false alarms and missed alarms, enables the detector to operate stably in harsh marine environments, and extends its service life. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1This is a schematic diagram of the exploded structure of this utility model;

[0022] In the diagram: 1. Front cover; 2. Front sealing gasket; 3. Housing; 4. Sealing glass; 5. Front fixing bracket; 6. Middle sealing gasket; 7. Rear fixing bracket; 8. Rear sealing ring; 9. Outlet expansion plug; 10. Outlet tube screw; 11. Circuit board; 12. Rear end. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Depend on Figure 1 As shown, this utility model includes a housing 3, a front cover 1, and a rear cable outlet structure, with a front sealing gasket 2 disposed between the front cover 1 and the housing 3.

[0025] The sealing glass 4 is installed at the optical window of the front cover 1 and is positioned between the front sealing gasket 2 and the middle sealing gasket 6;

[0026] The front fixed bracket 5 and the rear fixed bracket 7 are fixed inside the housing 3, and a circuit board 11 is provided between the front fixed bracket 5 and the rear fixed bracket 7.

[0027] The rear sealing ring 8 is located at the rear end 12 of the housing 3;

[0028] The rear cable exit structure includes a cable exit plug 9 and a cable exit tube screw 10. The rear cable exit structure is used for cable sealing and is connected to the rear end 12.

[0029] Three infrared optical filters in different bands are used for flame detection and background radiation detection;

[0030] The infrared detection element is set up in correspondence with the infrared optical filter. The selected infrared detection element is a high-sensitivity, low-noise infrared detection element, which corresponds one-to-one with the optical filter of the three bands. The received infrared radiation signal is converted into an electrical signal to ensure effective capture of weak flame signals.

[0031] The signal processing circuit is used to process the electrical signals output by the infrared detection element.

[0032] Three infrared optical filters of different bands correspond to the characteristic wavelength of the flame and two background reference wavelengths, respectively. One is used for flame detection, and the other two are used for background infrared radiation detection. They work together to accurately filter out the characteristic infrared band signal of the flame, effectively improving the selectivity and sensitivity of flame radiation and reducing interference from other background radiation. The signal processing circuit includes amplification, filtering and analog-to-digital conversion modules. Through specific algorithms, the signals of the three bands are analyzed and compared to determine whether a flame exists, effectively reducing the false alarm rate.

[0033] The front sealing gasket 2, the middle sealing gasket 6, and the rear sealing ring 8 together constitute the detector's sealing system, ensuring the detector's waterproof and dustproof performance in marine environments.

[0034] A shock-absorbing structure is provided between the front fixed bracket 5 and the rear fixed bracket 7 to reduce the impact of external impacts on the internal components of the detector.

[0035] The cable expansion plug 9 and the cable outlet screw 10 are connected by threads and filled with sealing material, which enhances the reliability of the cable seal.

[0036] The housing 3 is made of high-strength, corrosion-resistant materials, making it suitable for marine environments and improving the durability and reliability of the detector.

[0037] Working Principle: During operation, three infrared optical filters of different wavelengths are precisely installed in front of the optical lens according to design requirements, ensuring alignment between the filters and the optical axis of the detection element to guarantee accurate light transmission. The infrared detection element is then fixed in its corresponding position, ensuring a tight fit with the optical filters. Simultaneously, electrical connections are established to guarantee stable signal transmission. Based on the designed circuit diagram, suitable electronic components are selected, soldered, and debugged on the circuit board to ensure normal circuit function and accurate processing of the signals output by the detection element. The assembled optical system, detection element, and signal processing circuit are then installed inside the housing, and the wiring of each part is securely connected. The housing is then sealed, and shock-absorbing devices are installed, completing the assembly of the entire detector. This significantly improves the accuracy and reliability of detecting marine fires, reduces false alarms and missed alarms, enables the detector to operate stably in harsh marine environments, and extends its service life.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-band infrared flame detector for marine environments, comprising a housing (3), a front cover (1), and a rear cable exit structure, characterized in that: A front sealing gasket (2) is disposed between the front end cover (1) and the housing (3); A sealing glass (4) is installed at the optical window of the front cover (1) and is disposed between the front sealing gasket (2) and the middle sealing gasket (6); The front fixed bracket (5) and the rear fixed bracket (7) are fixed inside the housing (3), and a circuit board (11) is provided between the front fixed bracket (5) and the rear fixed bracket (7); The rear sealing ring (8) is located at the rear end (12) of the housing (3); The rear cable outlet structure includes a cable outlet expansion plug (9) and a cable outlet tube screw (10). The rear cable outlet structure is used for cable sealing and is connected to the rear end (12). Three infrared optical filters in different bands are used for flame detection and background radiation detection; An infrared detection element is provided corresponding to the infrared optical filter; A signal processing circuit is used to process the electrical signals output by the infrared detection element.

2. A three-band infrared flame detector for marine environments according to claim 1, characterized in that: The three infrared optical filters of different bands correspond to the characteristic wavelength of the flame and two background reference wavelengths, respectively. The signal processing circuit includes amplification, filtering and analog-to-digital conversion modules.

3. A three-band infrared flame detector for marine environments according to claim 2, characterized in that: The front sealing gasket (2), the middle sealing gasket (6), and the rear sealing ring (8) together constitute the sealing system of the detector.

4. A three-band infrared flame detector for marine environments according to claim 3, characterized in that: A shock-absorbing structure is provided between the front fixed bracket (5) and the rear fixed bracket (7).

5. A three-band infrared flame detector for marine environments according to claim 4, characterized in that: The outlet expansion plug (9) and outlet pipe screw (10) are connected by threads and filled with sealing material.

6. A three-band infrared flame detector for marine environments according to claim 5, characterized in that: The shell (3) is made of high-strength, corrosion-resistant material.

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