Laser alarm device

Abstract

The utility model discloses laser alarm equipment, which relates to the field of alarm equipment and comprises a plurality of laser detection unit modules, a plurality of amplification modules, a central processing unit and a power supply module. One amplification module is used for signal amplification of pulse laser signals acquired by one laser detection unit module; the power supply module is used for supplying power to the plurality of laser detection unit modules, the plurality of amplification modules and the central processing unit; according to the laser alarm equipment, the structural design is simplified, the space utilization rate is improved, the size is reduced, and the construction cost is reduced; and domestic products are adopted, so that technical dependence is avoided.

Description

Technical Field

[0001] The utility model relates to the field of warning devices, in particular to a laser warning device. Background Art

[0002] Laser warning is divided into two categories: active and passive according to the principle. Currently, more research has been carried out and the passive laser warning is in use. Compared with the international advanced level, from the technical field, the United States, Germany, the United Kingdom, France, Russia and other countries have their own characteristic laser warning equipment in this field, and the domestic equipment lacks in technical maturity. In recent years, China has also shown good performance in this field, but the existing laser warning devices have the following disadvantages: they may not be mature enough in system integration and test verification. Content of the Utility Model

[0003] The purpose of the utility model is to design a laser warning device to solve the above problems.

[0004] The utility model realizes the above purpose through the following technical solutions:

[0005] A laser warning device includes:

[0006] A plurality of laser detection unit modules; the laser detection unit modules are used for collecting pulsed laser signals;

[0007] A plurality of amplification modules; one amplification module is used for amplifying the signal of the pulsed laser signal collected by one laser detection unit module, and the signal output end of one laser detection unit module is connected to the signal input end of one amplification module;

[0008] A central processing unit; the signal output ends of the plurality of amplification modules are connected to the signal input end of the central processing unit;

[0009] A power supply module; the power supply module is used for supplying power to the plurality of laser detection unit modules, the plurality of amplification modules and the central processing unit.

[0010] The beneficial effect of the utility model is that: a laser warning device simplifies the structural design, improves the space utilization rate, reduces the volume, and lowers the project cost; all use domestic products to get rid of technical dependence. Description of the Drawings

[0011] Figure 1 is a schematic diagram of a laser warning device of the utility model;

[0012] Figure 2 is a structural schematic diagram of a laser warning device of the utility model;

[0013] Figure 3 is a structural schematic diagram of the laser detection unit module in the utility model;

[0014] Figure 4 It is a schematic diagram of the working principle of a laser warning device of the present utility model;

[0015] Figure 5 It is a principle block diagram of the amplification module in the present utility model;

[0016] Figure 6 It is a schematic diagram of the diaphragm in the present utility model Figure 1 ;

[0017] Figure 7 It is a schematic diagram of the diaphragm in the present utility model Figure 2 ;

[0018] Among them, the corresponding reference numerals are:

[0019] 1 - upper frame of the base, 2 - base of the base, 3 - back plate, 4 - laser detection unit module, 401 - window retaining ring, 402 - window glass, 403 - sealing ring, 404 - diaphragm, 405 - detection unit, 5 - central processing unit, 6 - power module, 7 - installation housing, 8 - first installation position, 9 - second installation position. Specific embodiments

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0022] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0024] In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, terms such as "set", "connect" should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] The following will describe in detail the specific embodiments of the present utility model with reference to the drawings.

[0027] As Figures 1-5 shown, a laser warning device includes:

[0028] A plurality of laser detection unit 405 modules 4; the laser detection unit 405 module 4 is used to collect pulsed laser signals;

[0029] A plurality of amplification modules; one amplification module is used for signal amplification of the pulsed laser signal collected by one laser detection unit 405 module 4, and the signal output end of one laser detection unit 405 module 4 is connected to the signal input end of one amplification module;

[0030] A central processor 5; the signal output ends of the plurality of amplification modules are connected to the signal input end of the central processor 5; the model of the central processor 5 is JFMK50T4;

[0031] A power supply module 6; the power supply module 6 is used for power supply to the plurality of laser detection unit 405 modules 4, the plurality of amplification modules and the central processor 5, and the model of the power supply module 6 is FHT4644.

[0032] Each amplification module includes an amplification circuit and a comparison circuit. The amplification circuit includes pulse amplification, continuous amplification, and secondary amplification. The signal output terminal of a laser detection unit 405 module 4 is respectively connected to the signal input terminals of the pulse amplification and continuous amplification. The signal output terminal of the continuous amplification is connected to the signal input terminal of the secondary amplification. The signal output terminals of the pulse amplification and secondary amplification are both connected to the signal input terminal of the comparison circuit. The signal output terminal of the comparison circuit is connected to the signal input terminal of the central processor 5. In the signal amplification circuit part of the amplification module, a frequency selection network is used to select the pulsed laser signal, and corresponding bandwidth and high amplification factor are adopted for the pulsed laser signal. The entire amplification module adopts a complete filtering design, which can better filter out the interference signals in the circuit and effectively improve the anti-interference ability.

[0033] Each laser detection unit 405 module 4 includes a window retaining ring 401, a window glass 402, a sealing ring 403, a diaphragm 404, a detection unit 405, and a window seat. The window retaining ring 401 is fixedly installed on the window seat. The detection unit 405 is fixedly installed on the side of the window seat away from the window retaining ring 401. The window glass 402 is installed on the side of the window retaining ring 401 close to the window seat. The two sides of the sealing ring 403 are respectively in extrusion contact with the diaphragm 404 and the window glass 402. The surfaces of the window retaining ring 401 and the like that need to be subjected to conductive anodic oxidation have obtained good corrosion resistance, and stress relief treatment has been done on some parts to avoid deformation during use and affect the optical performance.

[0034] As Figure 6 、 Figure 7 shown, the entire light-transmitting aperture surface formed by the two diaphragms 404 and window retaining rings 401 is sprayed with laser stealth material, achieving better elimination of stray light.

[0035] The laser warning device further includes an installation housing 7. The installation housing 7 is provided with a first installation position 8 and three second installation positions 9. There are four amplification modules and four laser detection unit 405 modules 4. One laser detection unit 405 module 4 is installed on the first installation position 8, and the remaining three laser detection unit 405 modules 4 are respectively installed on the three second installation positions 9. The first installation position 8 is located on the upper surface of the installation housing 7, and the three second installation positions 9 are located on one side of the installation housing 7. The first installation position 8 and the three second installation positions 9 are used to position the laser detection unit 405 module 4, ensuring the pointing accuracy of the laser detection unit 405 module 4; on the premise of meeting the performance requirements, the laser detection unit 405 module 4 makes full use of the internal space, miniaturizing and lightening the entire device, which helps to improve the anti-vibration performance.

[0036] The laser detection unit 405 module 4 is installed with electromagnetic shielding materials and sealing materials to endow the laser detection unit 405 module 4 with good electromagnetic shielding performance and rainproof ability. The laser detection unit 405 module 4 is installed from the outside of the first installation position 8 or the second installation position 9, and the interface is sealed with a waterproof silicone rubber ring.

[0037] The installation housing 7 includes a base upper frame 1, a base base 2, a back plate 2, and multiple side plates.

[0038] The detection field of view of each laser detection unit 405 module 4 installed in the second installation position 9 is 45°, and the detection elevation angle range is -10° to 90°. The detection field of view of the 3 laser detection unit 405 modules 4 installed in the second installation position 9 is 120°.

[0039] Modular and miniaturized design is adopted, and the electromagnetic shielding structure is considered in the design process of the detection module, so that the laser detection unit 405 module 4 has good electromagnetic shielding performance. In order to endow the laser warning device unit with good azimuth angle resolution ability, the laser detection unit 405 module 4 integrates the detector and the diaphragm 404. At the same time, the diaphragm 404 adopts special processes to greatly improve the ability of the diaphragm 404 to suppress stray light.

[0040] Embodiment 1:

[0041] The diaphragm 404 is to ensure the detection airspace of a single laser detection unit 405 module 4. The detection airspace of a single laser detection unit 405 module 4 is 45° horizontally and -10° to 90° vertically. Because the detection unit 405 has high sensitivity, the diaphragm 404 adopts a strong light design, and multi-layer diaphragms 404 and surface treatment of the diaphragm 404 are used to suppress stray light. In order to ensure the warning angle resolution accuracy, the ray tracing method is used to perform ray tracing operations on the rays on each diaphragm 404 during the design process of the diaphragm 404, and the curve fitting is used to complete the curve structure of the diaphragm 404. The fitted curve of the diaphragm 404 is as Figure 6 and Figure 7 shown.

[0042] Embodiment 2:

[0043] In the optical design, a filter is placed at the front end of each optical window. The filter plays a role in suppressing the interference of background light in the entire optical path. The filter uses red glass material with the brand number HWB850. The light transmittance of this glass material for optical signals with λ < 0.85 µm is approximately 0%. After double-sided antireflection coating (antireflection at 1.06 µm, 1.54 µm, and 1.57 µm), the transmittance is as high as 94% at 1.06 µm, 1.54 µm, and 1.57 µm, ensuring that the laser can reach the detector surface with low loss and be converted into an electrical signal, and through processing, detection and warning of three wavelengths of 1.06 µm, 1.54 µm, and 1.57 µm are realized.

[0044] The technical solution of the present utility model is not limited to the restrictions of the above specific embodiments. Any technical deformation made according to the technical solution of the present utility model falls within the protection scope of the present utility model.

Claims

1. A laser warning device, characterized in that, Including: Multiple laser detection unit modules; the laser detection unit modules are used to collect pulsed laser signals; Multiple amplification modules; One amplification module is used to amplify the signals of the pulsed laser signals collected by one laser detection unit module, and the signal output end of one laser detection unit module is connected to the signal input end of one amplification module; A central processing unit; the signal output ends of the multiple amplification modules are connected to the signal input end of the central processing unit; A power supply module; the power supply module is used to supply power to the multiple laser detection unit modules, the multiple amplification modules and the central processing unit.

2. The laser warning device according to claim 1, characterized in that, Each amplification module includes an amplification circuit and a comparison circuit. The amplification circuit includes pulse amplification, continuous amplification and secondary amplification. The signal output end of one laser detection unit module is respectively connected to the signal input ends of the pulse amplification and the continuous amplification. The signal output end of the continuous amplification is connected to the signal input end of the secondary amplification. The signal output ends of the pulse amplification and the secondary amplification are both connected to the signal input end of the comparison circuit. The signal output end of the comparison circuit is connected to the signal input end of the central processing unit.

3. A laser warning device according to claim 1, characterized in that, Each laser detection unit module includes a window retaining ring, a window glass, a sealing ring, a diaphragm, a detection unit and a window seat. The window retaining ring is fixedly installed on the window seat. The detection unit is fixedly installed on the side of the window seat away from the window retaining ring. The window glass is installed on the side of the window retaining ring close to the window seat. The two sides of the sealing ring are respectively in pressing contact with the diaphragm and the window glass.

4. A laser warning device according to claim 1, wherein, The laser warning device further includes an installation housing. A first installation position and three second installation positions are provided on the installation housing. There are four amplification modules and four laser detection unit modules. One of the laser detection unit modules is installed on the first installation position, and the remaining three laser detection unit modules are respectively installed on the three second installation positions. The first installation position is located on the upper surface of the installation housing, and the three second installation positions are located on one side of the installation housing.

5. A laser warning device according to claim 4, wherein, The detection field of view of each laser detection unit module installed on the second installation position is 45°, and the detection elevation angle range is -10° to 90°. The detection field of view of the 3 laser detection unit modules installed on the second installation position is 120°.

Images