Anti-intrusion laser radar active detection device

Abstract

The invention relates to the technical field of laser radars, in particular to an anti-intrusion laser radar active detection device which is characterized by comprising a base and a cover body arranged at the top of the base, and a fixing fastener, a laser radar assembly and an adjusting assembly are arranged in the cover body. The laser radar assembly comprises a laser transmitter, a beam shaper and a receiver, the laser transmitter and the beam shaper are respectively arranged at the lower half parts of the inner sides of the two different fixing fasteners, and the receiver is arranged on the outer surface of the fixing fastener close to the beam shaper; the outer side wall, close to the laser emitter, of the fixing fastener is provided with an adjusting assembly used for controlling the laser emission amount, and an adjusting assembly used for controlling the light inlet amount of the receiver is arranged between the fixing fastener and the receiver. Accurate laser detection is achieved through the laser radar assembly, and the laser emission amount and the receiver light inlet amount can be flexibly controlled and adjusted through the adjusting assembly so as to adapt to detection requirements and condition changes in different environments.

Description

Technical Field

[0001] The invention patent relates to the technical field of laser radar, and specifically, to an anti-intrusion laser radar active detection device. Background Art

[0002] As an advanced security technology device, the anti-intrusion laser radar active detection device has attracted widespread attention as a high-precision, long-distance detection method with the continuous development and application of laser technology. Its improvements in detection distance, resolution, and anti-interference ability make it an ideal choice for dealing with intrusion threats. Compared with traditional surveillance cameras, laser radar active detection devices can better protect personal privacy because they usually only detect and track the position and movement of the target, and do not involve the capture and storage of image data, thereby reducing the risk of privacy leakage. With the continuous improvement of sensor technology and data processing technology, as well as the reduction of manufacturing costs, the research and development and application of anti-intrusion laser radar active detection devices have become more feasible. At the same time, the optimization of power and energy consumption also provides a guarantee for its long-term stable operation in various environments. The anti-intrusion laser radar active detection device is mainly driven by the increase in security needs, the advancement of laser technology, the need for privacy protection, technical feasibility, and industry needs, which together promote the widespread application and development of the device in the security field.

[0003] A Chinese patent with the publication number CN216771972U discloses an anti-intrusion laser radar active detection device, including a box, the inner bottom wall of the box is fixedly inlaid with two rolling bearings, the inner ring of each rolling bearing is fixedly connected with a threaded barrel, the outer surface of each threaded barrel is fixedly connected with a worm wheel, the inner side wall of the box is fixedly inlaid with a sealed bearing and a pressure bearing, and the inner ring of the pressure bearing and the inner ring of the sealed bearing are jointly fixedly connected with a worm. The anti-intrusion laser radar active detection device drives the threaded barrel to rotate inside the rolling bearing by utilizing the cooperation of the worm and the worm wheel, and then through the cooperation of the threaded barrel and the threaded barrel, the connecting plate pushes the limiting rod to pass through the through hole and the limiting hole in sequence, and the limiting rod and the limiting hole are used to limit the connecting plate, so that the staff can install the laser radar detection body. The installation speed is fast, the use is convenient, and the workload of the staff can be reduced.

[0004] However, the anti-intrusion laser radar active detection device has the following problems:

[0005] 1. The structure of the device is relatively complex, involving the coordination and movement of multiple components, including rolling bearings, threaded barrels, worm gears, worms, etc. This not only increases the difficulty of assembly and the risk of failure of the device, but also requires a precise assembly process, which makes assembly difficult;

[0006] 2. The device does not have components that directly control the amount of laser emission and the amount of light entering the receiver. It is relatively difficult to adapt to detection needs and changing conditions in different environments, which limits the flexibility and applicability of the device. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide an anti-intrusion laser radar active detection device, which can ensure the use of a modular design so that the various components of the present invention can be independently assembled and maintained, and the individual modules can be more easily repaired or replaced, thereby reducing maintenance costs and working time; and accurate laser detection is achieved through the laser radar components, and the laser emission amount and the receiver light input amount can be flexibly controlled and adjusted through the adjustment components on the fixed fasteners to adapt to the detection needs and condition changes in different environments.

[0008] The present invention is implemented as follows, including a base and a cover body arranged on the top of the base, characterized in that a fixing fastener, a laser radar component and an adjustment component are arranged inside the cover body, the laser radar component includes a laser transmitter, a beam shaper and a receiver, the laser transmitter and the beam shaper are respectively arranged in the lower half of the inner side of two different fixing fasteners, the receiver is arranged on the outer surface of the fixing fastener close to the beam shaper, the outer side wall of the fixing fastener close to the laser transmitter is provided with an adjustment component for controlling the laser emission amount, and an adjustment component for controlling the light input amount of the receiver is arranged between the fixing fastener and the receiver.

[0009] Furthermore, the adjustment assembly includes a support ring, an adjuster and an adjustment toothed disc, the receiver is fixedly arranged on the surface of the support ring, the other side of the support ring is fixedly connected to the adjustment toothed disc away from the surface of the fixing fastener, the surface of the adjustment toothed disc is provided with adjustment holes in a circular array, the adjuster is arranged on the upper half of the outer side wall of the fixing fastener, and the output end of the adjuster is clamped on the adjustment toothed disc and in contact with the adjustment hole.

[0010] Furthermore, a plurality of positioning grooves for facilitating the installation of the receiver are arranged inside the support ring, and a reset hole is also arranged on the surface of the adjusting gear disc.

[0011] Furthermore, a driving layer is provided inside the base, a rotating shaft is provided at the output end of the driving layer, a rotating disk is sleeved on the side wall of the rotating shaft, a rotating base is provided at the other end of the rotating shaft, and a bracket connected to the bottom of the fixing fastener is provided on the top of the rotating base.

[0012] Furthermore, an optical channel is provided between the laser emitter and the beam shaper, and a photoelectric detector is provided on the optical channel near the laser emitter.

[0013] Furthermore, the photodetector is fixedly arranged and corresponds to the optical channel, and is used to detect the laser pulse fed back by the beam shaper through the optical channel, so as to convert the optical signal into an electrical signal.

[0014] Furthermore, the photoelectric detector includes a signal processing unit and a control and data processing unit, the signal processing unit is used to process the electrical signal obtained from the photoelectric detector, and the control and data processing unit is used to control the transmission and receiving process of the laser radar system.

[0015] Furthermore, the control and data processing unit includes timing control, time domain analysis, frequency domain analysis and target detection.

[0016] Furthermore, the cover body is a spherical structure cover body, a side surface of the cover body is provided with a lens, and the surface of the lens is coated with an anti-reflection coating.

[0017] Furthermore, the fixing fastener is an integrally formed teardrop-shaped fastener, and a power control unit is disposed on the upper portion of the fixing fastener.

[0018] Compared with the prior art, the present invention adopts a modular design of the base and the cover, and the fixing fasteners, the laser radar components and the adjustment components are installed inside, so that each component of the present invention can be assembled and maintained independently, and the individual modules can be repaired or replaced more easily, thereby reducing maintenance costs and working time;

[0019] The laser radar assembly of the present invention includes a laser transmitter, a beam shaper and a receiver, through which accurate laser detection is achieved. The laser emission amount and the receiver light input amount can be flexibly controlled and adjusted through the adjustment components on the fixing fasteners to adapt to the detection needs and condition changes in different environments. This flexible adjustment performance can ensure the stable operation of the equipment in various complex scenarios.

[0020] In addition, the present invention sets an optical channel between the laser emitter and the beam shaper, and installs a photodetector near the laser emitter in the optical channel, which helps to ensure the accurate transmission and reception of the laser, improves the stability and reliability of the detection system, and can timely adjust the output of the laser emitter through the feedback of the photodetector to maintain the stability and accuracy of the detection system; the photodetector includes a signal processing unit and a control and data processing unit, which are used to process and analyze the signal obtained from the photodetector. The control and data processing unit covers functions such as timing control, time domain analysis, frequency domain analysis and target detection, and can monitor and process the detected information in real time, thereby improving the intelligence level and work efficiency of the device;

[0021] The cover body of the present invention adopts a spherical shape structure, a lens is arranged on the side surface, and an anti-reflective coating is applied, which can effectively reduce the reflection and loss of light and improve the detection accuracy and efficiency of the optical system. The lens can focus the light beam and enhance the detection distance and accuracy. The upper part of the fixing fastener is provided with a power control unit, which can provide stable power support for the entire device and ensure the normal operation and performance of the equipment, thereby ensuring the stability and reliability of the power supply of the device during long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure provided by the present invention;

[0023] Figure 2 It is a schematic diagram of the installation of the laser radar component and the adjustment component provided by the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the inner part of the fixing fastener provided by the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the outer part of the fixing fastener provided by the present invention;

[0026] Figure 5 It is a schematic diagram of the installation of the receiver provided by the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the adjusting toothed disc provided by the present invention.

[0028] The figure numerals involved in the above drawings are: 1. base; 2. cover; 3. fixing fastener; 4. laser radar component; 401. laser transmitter; 402. beam shaper; 403. receiver; 404. optical channel; 405. photodetector; 5. adjustment component; 501. support ring; 502. adjuster; 503. adjustment gear disk; 504. positioning groove; 505. reset hole; 506. adjustment hole; 6. drive layer; 7. rotating shaft; 8. rotating disk; 9. rotating base; 10. bracket; 11. lens; 12. power control unit. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0031] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] Reference Figure 1-6 The figure shows a preferred embodiment of the present invention.

[0033] Embodiment: An anti-intrusion laser radar active detection device comprises a base 1 and a cover 2 installed on the top of the base 1. The base 1 is the basic support part of the entire device, and has good strength, corrosion resistance and weldability to ensure that the device and the cover 2 are firmly installed in the desired position and have sufficient load-bearing capacity. The cover 2 is a spherical structure cover 2, that is, its appearance presents a contour similar to that of a sphere, but there are some slight geometric changes at the bottom of the cover 2 to adapt to the installation of the base 1. The base 1 and the cover 2 of the present invention are preferably made of ABS engineering plastic 3D printing, and the inside of the cover 2 is installed with various The assembly includes a fixing fastener 3, a laser radar assembly 4 and an adjustment assembly 5. The fixing fastener 3 is an integrally formed teardrop-shaped fastener. A power control unit 12 is installed on the upper half of the fixing fastener 3. The fixing fastener 3 is used to stably install the laser radar assembly 4 and the adjustment assembly 5 to ensure that their positions remain unchanged. The side surface of the cover body 2 is partially covered with a lens 11 to form a transparent window to allow light transmission and observation of various components inside. The surface of the lens 11 is covered with an anti-reflection coating. The anti-reflection coating of the present invention is preferably a multi-layer dielectric film anti-reflection coating, which is intended to reduce or eliminate the reflection of light on the surface of the lens 11;

[0034] A driving layer 6 is installed inside the base 1. The driving layer 6 is composed of a motor, a gear system and a transmission system. A rotating shaft 7 is installed at the output end of the driving layer 6. The rotating shaft 7 is used to transmit the driving force of the driving layer 6 to the rotating parts. The side wall of the rotating shaft 7 is sleeved with a rotating disk 8. The side wall of the rotating disk 8 is connected to the bottom of the cover body 2. The rotating disk 8 is used to carry and support the object rotating by the cover body 2. A rotating base 9 is installed at the other end of the rotating shaft 7. The rotating base 9 is a circular platform for supporting the rotating disk 8 and the parts above it. A bracket 10 is installed on the top of the rotating base 9. The bracket 10 is used to connect the rotating base 9 and the bottom of the fixing fastener 3. The bracket 10 enables it to be firmly fixed on the rotating base 9 and provides stable support to ensure stability and safety during the rotation process.

[0035] The laser emitter 401 is one of the core components of the laser radar and is used to generate laser. The laser emitter 401 of the present invention is preferably a semiconductor laser. The semiconductor laser selected in the present invention is a laser diode array composed of an array of multiple laser diodes, and the specific model is Lumentum StingRay SR-635. It is installed on the inner side of the lower half of the fixing fastener 3. The position of the laser emitter 401 corresponds to the subsequent beam shaper 402 to ensure good control and shaping of the laser beam; the beam shaper 402 is a component for adjusting the shape and characteristics of the laser beam. The beam shaper 402 of the present invention is preferably a diffraction beam shaper 402, and the specific model is Jenoptik BSE-635, which is installed on the inner side of the lower half of another fixed fastener 3, and is separated from the laser transmitter 401 by a certain distance. The function of the beam shaper 402 is to ensure that the shape, direction and intensity of the laser beam meet the requirements of the laser radar system; the receiver 403 is located on the outer surface of the fixed fastener 3, close to the side of the beam shaper 402, and its function is to receive the signal reflected back by the laser beam emitted by the laser transmitter 401 after passing through the target, thereby realizing target detection and ranging; an adjustment component 5 for controlling the laser emission amount is installed on the outer wall of the fixed fastener 3 close to the laser transmitter 401, and the adjustment component 5 can be used to adjust the power output of the laser transmitter 401 to adapt to different working scenes and needs. An adjustment component 5 for controlling the light input amount of the receiver 403 is also installed between the fixed fastener 3 and the receiver 403, so that the receiving sensitivity of the receiver 403 to the laser beam can be adjusted to optimize the capture and processing of the target signal;

[0036] An optical channel 404 is installed between the laser transmitter 401 and the beam shaper 402. The optical channel 404 is a transmission path connecting the laser transmitter 401 and the photodetector 405. Its function is to transmit the laser pulse from the transmitter to the receiver 403 and ensure that the quality and stability of the optical signal are maintained as much as possible; a photodetector 405 is installed near the laser transmitter 401 on the optical channel 404. The photodetector 405 is fixedly installed and corresponds to the optical channel 404. It is used to detect the laser pulse fed back by the beam shaper 402 through the optical channel 404, and convert the optical signal into an electrical signal through operations such as amplification, filtering, and denoising to minimize signal loss and interference; the photodetector 405 includes a signal processing unit and a control and data processing unit. The signal processing unit is used to process the electrical signal obtained from the photodetector 405, and the control and data processing unit is used to control the transmission and receiving process of the laser radar system; the control and data processing unit includes timing control, time domain analysis, frequency domain analysis and target detection;

[0037] The support ring 501 is internally provided with a plurality of positioning grooves 504 for facilitating the installation of the receiver 403. The function of these positioning grooves 504 is to provide fixing points to ensure that the receiver 403 can be accurately installed on the support ring 501. The other side is fixedly connected to the adjusting toothed disc 503 away from the surface of the fixing fastener 3, so that the support ring 501 can stably support and position the receiver 403; the adjusting toothed disc 503 is surface-mounted with adjusting holes 506 in a circular array, and these adjusting holes 506 are used to contact with the output end of the regulator 502. The regulator 502 is installed on the upper half of the outer wall of the fixing fastener 3, and the output end of the regulator 502 is clamped on the adjusting toothed disc 503 and contacts with the adjusting holes 506, so that the regulator 502 can adjust the adjusting toothed disc 503 as needed, and adjust the amount of light entering the receiver 403 by adjusting the adjusting toothed disc 503. The surface of the adjusting toothed disc 503 is also provided with a reset hole 505 to ensure that the regulator 502 can reset the adjusting toothed disc 503 when needed.

[0038] Working principle: The semiconductor laser (Lumentum StingRay SR-635) in the device of the present invention uses the characteristics of semiconductor materials to generate lasers. In the laser, a PN structure semiconductor device is injected with current, which causes electrons and holes to form around the PN junction. When these carriers recombine, they release energy and generate photons. These photons reflect back and forth between reflectors and gradually form a single laser beam. An array composed of multiple laser diodes. This array structure can improve output power and reliability. Each laser diode is capable of generating a beam of light. When they are integrated in an array, these beams can be combined into a more powerful overall beam. The generated laser beam may have a certain degree of non-uniformity or may not meet the shape and characteristics required by the system. In order to ensure the quality of the laser beam, a beam shaper is usually used to adjust it. In this device, a diffraction beam shaper (Jenoptik BSE-635) was selected, which can accurately adjust the laser through the principle of diffraction optics to ensure that the shape, direction and intensity of the laser beam meet the detection requirements;

[0039] After the laser beam is emitted from the laser transmitter, it is transmitted to the target area along the optical transmission path, i.e., the optical channel. The optical channel includes optical elements such as optical lenses, reflectors, or optical fibers, which can minimize the attenuation and diffusion of the light beam and maintain the directionality and stability of the light beam. After the laser beam reaches the target area, it will interact with potential targets, which can be people, vehicles, or other objects, and they will reflect part of the laser energy. This reflected energy is usually called an echo, which contains information about the target, such as position, shape, surface characteristics, etc. The receiver in the device is located on the outer surface of the fixed fastener, and its position is designed so that it can effectively receive the laser signal reflected from the target. The position of the receiver needs to be precisely designed and calibrated to ensure that the light signal reflected by the target can be captured to the maximum extent. The laser signal received by the receiver reaches the photodetector in the reverse direction along the optical channel. The photodetector can convert the received light signal into a corresponding electrical signal. The photodetector includes a photodiode and a photomultiplier tube, and has the characteristics of high sensitivity and fast response, and can effectively capture weak light signals. After the received light signal is converted into an electrical signal by the photodetector, it will be sent to the signal processing unit for further processing;

[0040] The received laser signal is preprocessed by the signal processing unit, which includes signal amplification, filtering, denoising and other operations to enhance the signal quality and reduce noise interference. The preprocessed signal will be easier to perform subsequent target detection and data extraction. The device is equipped with a target detection algorithm to extract target information from the preprocessed laser signal. Common target detection algorithms include threshold-based methods, pattern recognition methods, machine learning methods, etc. These algorithms can identify the location, shape, size and other characteristics of the target and distinguish it from the background. Once the target is detected, the device will extract relevant information of the target from the laser signal, such as distance, direction, speed, etc. This information will be transmitted to the control and data processing unit for further analysis and processing. In this process, filtering, fitting, clustering and other technologies may be used to process the data and extract effective information. After data processing, the device will identify and classify the target, which includes determining the type of target (such as people, vehicles, animals, etc.) and its possible behavior. The results of identification and classification will be used for subsequent decisions and actions. According to the results of target detection and data processing, the device will make corresponding decisions and responses. This may include sounding an alarm, recording data, triggering safety measures, etc. The accuracy and timeliness of decision-making and response directly affect the performance and effectiveness of the device;

[0041] The adjustment component close to the laser transmitter of the present invention controls the laser emission amount by adjusting the current of the laser diode. The output power of the laser diode is positively correlated with the injected current. Increasing the current can increase the output power of the laser transmitter, while reducing the current will reduce the power. The adjustment component usually includes a current control module, i.e., a regulator, which adjusts the angle of the adjusting gear disk and then changes the current value in the control circuit to adjust the laser emission amount. Specifically, the regulator affects the working state of the laser diode by adjusting the angle of the adjusting gear disk, thereby controlling the laser emission amount. When the regulator changes the angle of the adjusting gear disk, it actually adjusts the working current of the laser diode, thereby adjusting the output power of the laser transmitter. This process is accomplished through the interaction between the regulator and the adjusting gear disk. The regulator controls the movement or rotation of the adjusting gear disk to achieve the desired laser emission amount;

[0042] Another adjustment component of the present invention controls the intensity of the light signal received by the receiver by adjusting the amount of light entering the receiver. In the structure of the support ring and the adjustment toothed disc, the angle of the adjustment toothed disc can be adjusted, thereby affecting the amount of light entering the receiver. When the regulator adjusts the adjustment toothed disc, the output end of the regulator is clamped on the adjustment toothed disc and contacts the adjustment hole. By changing the state of the regulator, the angle of the toothed disc is adjusted, thereby adjusting the amount of light entering the receiver. In this way, the intensity of the light signal received by the receiver can be controlled, thereby affecting the performance of the laser radar system.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-intrusion laser radar active detection device, comprising a base (1) and a cover (2) arranged on the top of the base (1), characterized in that: The cover body (2) is provided with a fixing fastener (3), a laser radar component (4) and an adjustment component (5) inside. The laser radar component (4) comprises a laser transmitter (401), a beam shaper (402) and a receiver (403). The laser transmitter (401) and the beam shaper (402) are respectively arranged at the lower half of the inner side of two different fixing fasteners (3). The receiver (403) is arranged on the outer surface of the fixing fastener (3) close to the beam shaper (402). The outer side wall of the fixing fastener (3) close to the laser transmitter (401) is provided with an adjustment component (5) for controlling the laser emission amount. The adjustment component (5) for controlling the light input amount of the receiver (403) is provided between the fixing fastener (3) and the receiver (403).

2. The anti-intrusion laser radar active detection device according to claim 1, characterized in that: The adjustment assembly (5) comprises a support ring (501), an adjuster (502) and an adjustment toothed disc (503); the receiver (403) is fixedly arranged on the surface of the support ring (501); the other side surface of the support ring (501) is fixedly connected to the surface of the adjustment toothed disc (503) away from the fixing fastener (3); the surface of the adjustment toothed disc (503) is provided with adjustment holes (506) in a circular array; the adjuster (502) is arranged on the upper half of the outer side wall of the fixing fastener (3); the output end of the adjuster (502) is clamped on the adjustment toothed disc (503) and contacts the adjustment hole (506).

3. The anti-intrusion laser radar active detection device according to claim 2, characterized in that: The support ring (501) is provided with a plurality of positioning grooves (504) for facilitating the installation of the receiver (403), and the surface of the adjusting toothed disc (503) is also provided with a reset hole (505).

4. The anti-intrusion laser radar active detection device according to claim 1, characterized in that: A driving layer (6) is arranged inside the base (1), a rotating shaft (7) is arranged at the output end of the driving layer (6), a rotating disk (8) is sleeved on the side wall of the rotating shaft (7), a rotating base (9) is arranged at the other end of the rotating shaft (7), and a bracket (10) connected to the bottom of the fixing fastener (3) is arranged at the top of the rotating base (9).

5. The anti-intrusion laser radar active detection device according to claim 1, characterized in that: An optical channel (404) is provided between the laser emitter (401) and the beam shaper (402), and a photoelectric detector (405) is provided on the optical channel (404) near the laser emitter (401).

6. The anti-intrusion laser radar active detection device according to claim 5, characterized in that: The photodetector (405) is fixedly arranged and corresponds to the optical channel (404), and is used to detect the laser pulse fed back by the beam shaper (402) through the optical channel (404), so as to convert the optical signal into an electrical signal.

7. The anti-intrusion laser radar active detection device according to claim 5, characterized in that: The photodetector (405) comprises a signal processing unit and a control and data processing unit, wherein the signal processing unit is used to process the electrical signal obtained from the photodetector (405), and the control and data processing unit is used to control the transmission and reception process of the laser radar system.

8. The anti-intrusion laser radar active detection device according to claim 7, characterized in that: The control and data processing unit includes timing control, time domain analysis, frequency domain analysis and target detection.

9. The anti-intrusion laser radar active detection device according to claim 1, characterized in that: The cover body (2) is a cover body (2) of a spherical structure, a lens (11) is provided on the side surface of the cover body (2), and an anti-reflection coating is applied on the surface of the lens (11).

10. The anti-intrusion laser radar active detection device according to claim 1, characterized in that: The fixing fastener (3) is an integrally formed teardrop-shaped fastener, and a power control unit (12) is provided on the upper part of the fixing fastener (3).

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