Laser alarm monitoring system

Abstract

The utility model relates to the technical field of safety protection, in particular to a laser alarm monitoring system, which comprises a first laser detector, a plurality of first laser emitters, a controller and an alarm, and is characterized in that the first laser detector is arranged at the first end of a to-be-monitored area; the plurality of first laser emitters are arranged at the second end of the to-be-monitored area, the second end is opposite to the first end, and at least part of laser beams emitted by the plurality of first laser emitters are emitted into the first laser detector; the controller is electrically connected with the first laser detector, the alarm is electrically connected with the controller, and the laser alarm monitoring system can effectively improve the precision during long-distance detection and reduce the cost at the same time.

Description

Technical Field

[0001] The present application relates to the field of safety protection technology, and in particular to a laser alarm monitoring system. Background Art

[0002] The characteristic of the laser alarm system used in traditional laser security is that the number of laser transmitters and laser receivers is the same. Because the laser beam has a certain divergence angle, its applicable distance is short, generally within 100m. When the distance between the laser transmitter and the receiver is too long, not only will the energy received by the laser receiver be too low, but also because the laser spot is too large, two laser receivers may receive the laser at the same time, so when a foreign object blocks the laser beam, it may not be able to issue an alarm in time because other laser beams are also received. However, if a laser with a small divergence is used, the cost will increase exponentially. Utility Model Content

[0003] The purpose of the present application is to provide a laser alarm monitoring system, which can effectively improve the accuracy of long-distance detection while reducing costs.

[0004] To this end, an embodiment of the present application provides a laser alarm monitoring system, including: a first laser detector, arranged at a first end of an area to be monitored; a plurality of first laser emitters, arranged at a second end of the area to be monitored, the second end being opposite to the first end, and at least a portion of the laser light beams emitted by the plurality of first laser emitters being incident on the first laser detector; a controller, electrically connected to the first laser detector, and an alarm, electrically connected to the controller.

[0005] In one possible implementation, the sum of power densities of laser beams emitted by multiple first laser emitters entering the first laser detector is P1, and the alarm threshold of the first laser detector triggering the alarm is P2, where P2 = P1-P3, and P3 is the error value.

[0006] In a possible implementation manner, a plurality of first laser emitters are arranged at intervals along a first direction at a second end of the area to be monitored.

[0007] In a possible implementation manner, the plurality of first laser emitters are distributed in a matrix at the second end of the area to be monitored.

[0008] In one possible implementation, the laser alarm monitoring system also includes: a second laser detector, which is arranged at the second end of the area to be monitored and is offset from the first laser detector, and the second laser detector is electrically connected to the controller; and a plurality of second laser emitters, which are arranged at the first end of the area to be monitored, and at least part of the laser light beams emitted by the plurality of second laser emitters are emitted into the second laser detector.

[0009] In one possible implementation, the total power density of the laser beams emitted by the multiple second laser transmitters entering the second laser detector is P4, and the alarm threshold of the second laser detector triggering the alarm is P5, where P5 = P4-P6, and P6 is the error value.

[0010] In a possible implementation manner, a plurality of second laser emitters are arranged at intervals along a first direction at a first end of the area to be monitored.

[0011] In a possible implementation, the plurality of second laser emitters are distributed in a matrix at the first end of the area to be monitored.

[0012] In one possible implementation, a plurality of first laser detectors are provided at the first end of the area to be monitored, and the plurality of first laser detectors respectively correspond to the plurality of first laser emitters; and / or a plurality of second laser detectors are provided at the second end of the area to be monitored, and the plurality of second laser detectors respectively correspond to the plurality of second laser emitters.

[0013] In a possible implementation manner, the first laser emitter and / or the second laser emitter is provided with a collimating lens.

[0014] According to the laser alarm monitoring system provided in the embodiment of the present application, the laser alarm monitoring system receives laser light beams emitted by multiple first laser emitters through a first laser detector. If an invading object blocks the laser light beam emitted by any first laser emitter, the laser power density received by the first laser detector will decrease, thereby triggering an alarm through a controller, which can effectively improve the accuracy of long-distance detection while reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1A flowchart of a laser alarm monitoring system provided by an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of a laser alarm monitoring system provided by an embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram showing another laser alarm monitoring system provided by an embodiment of the present application is shown;

[0021] Figure 4 A schematic diagram showing another laser alarm monitoring system provided by an embodiment of the present application is shown;

[0022] Figure 5 A schematic diagram showing another laser alarm monitoring system provided by an embodiment of the present application is shown;

[0023] Figure 6 A schematic diagram showing the structure of a first laser emitter and a collimating lens provided in an embodiment of the present application is shown;

[0024] Figure 7 A schematic structural diagram of a second laser emitter and a collimating lens provided in an embodiment of the present application is shown.

[0025] Description of reference numerals:

[0026] X, first direction; a, area to be monitored; a1, first end; a2, second end;

[0027] 1. First laser detector; 2. First laser emitter; 3. Controller; 4. Alarm; 5. Second laser detector; 6. Second laser emitter; 7. Collimating lens. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0029] The disclosure below provides many different embodiments or examples to realize the different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present application. In addition, the embodiments of the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0030] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0031] In order to solve the problems in the prior art, the present application provides a laser alarm monitoring system, which can effectively improve the accuracy of long-distance detection while reducing costs.

[0032] like Figure 1-7 As shown, an embodiment of the present application provides a laser alarm monitoring system, including: a first laser detector 1, arranged at a first end a1 of an area to be monitored a; a plurality of first laser emitters 2, arranged at a second end a2 of the area to be monitored a, the second end a2 is opposite to the first end a1, and at least part of the laser light beams emitted by the plurality of first laser emitters 2 are emitted into the first laser detector 1; a controller 3, electrically connected to the first laser detector 1, and an alarm 4, electrically connected to the controller 3.

[0033] In the present application, the laser beams emitted by multiple first laser emitters 2 are received by the first laser detector 1. If an invading object blocks the laser beam emitted by any first laser emitter 2, the laser power density received by the first laser detector 1 will decrease, thereby triggering the alarm 4 through the controller 3 to sound an alarm, which can effectively improve the accuracy of long-distance detection while reducing costs.

[0034] In the related art, the laser alarm system has the same number of laser emitters and laser detectors. One laser detector receives the laser emitted by one laser emitter. However, because the laser beam has a certain divergence angle, when the distance between the laser emitter and the laser detector is long, not only will the energy received by the laser detector be too low, thus affecting the detection accuracy, but also because the laser spot is too large, there may be a situation where two laser detectors receive the same laser beam at the same time. Therefore, when an intruding object blocks the laser beam, the laser detector may not trigger an alarm because it also receives other laser beams. Of course, if a laser with a small divergence angle is used, the above problems can be avoided to a certain extent, but this will cause the cost to increase exponentially.

[0035] In the embodiment of the present application, a first laser detector 1 simultaneously receives lasers emitted by multiple first laser emitters 2, and the alarm threshold of the first laser detector 1 is adjusted, so that as long as a laser beam emitted by one first laser emitter 2 is blocked, the laser energy received by the first laser detector 1 will be reduced, thereby triggering an alarm. Multiple first laser emitters 2 emit lasers from different positions at the second end a2 of the monitored area a, which can also effectively increase the monitoring range. This reduces costs while improving the accuracy of detection alarms.

[0036] Specifically, the alarm 4 may be an audible and visual alarm or a siren, and may also be used to send a notification to the staff.

[0037] In one embodiment, the sum of the power densities of the laser beams emitted by the multiple first laser emitters 2 entering the first laser detector 1 is P1, and the alarm threshold of the first laser detector 1 triggering the alarm 4 is P2, where P2 = P1-P3, and P3 is the error value.

[0038] In the present application, the sum of the power densities of the laser beams emitted by the multiple first laser emitters 2 entering the first laser detector 1 is P1. The laser power density emitted by each first laser emitter 2 received by the first laser detector 1 can be measured by turning on each first laser emitter 2 separately, and then the laser power density emitted by each first laser emitter 2 received by the first laser detector 1 can be added to obtain P1. The alarm threshold P2 of the first laser detector 1 is less than P1, P2 = P1-P3, where P3 is the error value. The reason for subtracting one P3 is to reduce the false alarm rate. If a small object blocks the laser beam, the sum of the laser power density received by the first laser detector 1 is still greater than P2, and the alarm 4 will not be triggered. Only when a larger object blocks more laser beams, so that the laser power density received by the first laser detector 1 is reduced to below P2, the alarm is triggered.

[0039] Specifically, P3 can be adjusted by the controller 3, that is, the alarm threshold P2 of the first laser detector can be adjusted. P3 can be set according to the size of the object to be monitored. The larger the P3 is set, the smaller the false alarm rate is, and the accuracy will decrease; the smaller the P3 is set, the higher the accuracy is, and the false alarm rate is increased. Therefore, P3 needs to be set according to the actual situation.

[0040] In some embodiments, a plurality of first laser emitters 2 are arranged at intervals along the first direction X at the second end a2 of the area to be monitored a.

[0041] In the present application, a plurality of first laser emitters 2 are arranged at intervals along the first direction X, and the power density of the laser emitted by each first laser emitter 2 received by the first laser detector 1 is different.

[0042] like Figure 2 As shown, in a specific embodiment, to prevent external objects from entering the monitored area a, the first direction X can be a vertical direction, and the lasers emitted by multiple first laser emitters 2 form a laser network in the vertical plane. As long as an object blocks the laser beam and causes the laser power density received by the first laser detector 1 to drop below P2, an alarm will be triggered.

[0043] like Figure 3 As shown, in another embodiment, to prevent aerial objects from entering the monitored area a, the first direction X can be set to a horizontal direction, and the laser beams emitted by multiple first laser emitters 2 form a laser network in the plane. Only when an object passes through the laser network from above and causes the laser power density received by the first laser detector 1 to drop below P2, an alarm will be triggered.

[0044] like Figure 4 As shown, in another embodiment, the first direction X can also be tilted, that is, the laser net is formed to form an acute angle with both the horizontal plane and the vertical plane, which can prevent objects from climbing over the wall. If an object climbs over the wall and passes through the laser net and causes the laser power density received by the first laser detector 1 to drop below P2, an alarm will be triggered.

[0045] like Figure 5 As shown, in some embodiments, a plurality of first laser emitters 2 are distributed in a matrix at the second end a2 of the area to be monitored a.

[0046] In the present application, multiple first laser emitters 2 can also be distributed in a matrix to form a three-dimensional laser network. If an object blocks the laser beam and causes the laser power density received by the first laser detector 1 to drop below P2, an alarm will be triggered.

[0047] In some embodiments, the laser alarm monitoring system also includes: a second laser detector 5, which is arranged at the second end a2 of the monitored area a and is staggered with the first laser detector 1, and the second laser detector 5 is electrically connected to the controller 3; and a plurality of second laser emitters 6, which are arranged at the first end a1 of the monitored area a, and at least part of the laser beams emitted by the plurality of second laser emitters 6 are emitted into the second laser detector 5.

[0048] In the present application, a plurality of second laser emitters 6 are arranged at the first end a1 of the monitored area a, and a second laser detector 5 is arranged at the second end a2. The formed laser network complements the laser network formed by the first laser emitter 2, thereby increasing the coverage of the laser. Moreover, the first laser detector 1 and the second laser emitter 6 are both located at the first end a1, and the first laser detector 1 will not receive the laser emitted by the second laser emitter 6. The second laser detector 5 and the first laser emitter 2 are both located at the second end a2, and the second laser detector 5 will not receive the laser emitted by the first laser emitter 2, thereby avoiding mutual interference. On the basis of increasing the laser coverage, the accuracy of laser monitoring is guaranteed.

[0049] In some embodiments, the sum of the power densities of the laser beams emitted by the multiple second laser emitters 6 entering the second laser detector 5 is P4, and the alarm threshold of the second laser detector 5 triggering the alarm 4 is P5, where P5 = P4-P6, and P6 is the error value.

[0050] In the present application, the sum of the power densities of the laser beams emitted by the multiple second laser emitters 6 entering the second laser detector 5 is P4. The laser power density emitted by each second laser emitter 6 received by the second laser detector 5 can be measured by turning on each second laser emitter 6 separately, and then the laser power density emitted by each second laser emitter 6 received by the second laser detector 5 can be added to obtain P4. The alarm threshold P5 of the second laser detector 5 is less than P4, P5 = P4-P6, where P6 is the error value. The reason for subtracting one P6 is to reduce the false alarm rate. If a small object blocks the laser beam, the sum of the laser power density received by the second laser detector 5 is still greater than P5, and the alarm 4 will not be triggered. Only when a larger object blocks more laser beams, so that the laser power density received by the second laser detector 5 is reduced to below P5, the alarm is triggered.

[0051] Specifically, the controller 3 can adjust P6, that is, adjust the alarm threshold P5 of the second laser detector 5. P6 can be set according to the size of the object to be monitored. The larger the P6 is, the smaller the false alarm rate is, and the accuracy will decrease; the smaller the P6 is, the higher the accuracy is, and the false alarm rate is increased. Therefore, P6 needs to be set according to the actual situation.

[0052] In some embodiments, a plurality of second laser emitters 6 are spaced apart along the first direction X at the first end a1 of the area to be monitored a.

[0053] In the present application, multiple second laser emitters 6 are arranged at intervals along the first direction X, and the laser power densities of the multiple second laser emitters 6 received by the second laser detector 5 are different, wherein the first direction X can be a vertical direction or a horizontal direction, and can also be arranged at an angle with the vertical direction and the horizontal direction.

[0054] Specifically, the first laser emitter 2 and the second laser emitter 6 can be arranged at intervals along the first direction X, so as to form non-overlapping laser networks in the first direction X, thereby increasing the monitoring range.

[0055] Of course, the arrangement direction of the first laser emitters 2 may also be different from the arrangement direction of the second laser emitters 6, and the two may work separately to monitor objects entering from different directions.

[0056] In some embodiments, the plurality of second laser emitters 6 are distributed in a matrix at the first end a1 of the area to be monitored a.

[0057] In the present application, multiple second laser emitters 6 can also be distributed in a matrix to form a three-dimensional laser network. If an object blocks the laser beam and causes the laser power density received by the second laser detector 5 to drop below P5, an alarm will be triggered.

[0058] In some embodiments, a first end a1 of the monitored area a is provided with a plurality of first laser detectors 1, and the plurality of first laser detectors 1 respectively correspond to a plurality of first laser emitters 2; and / or a second end a2 of the monitored area a is provided with a plurality of second laser detectors 5, and the plurality of second laser detectors 5 respectively correspond to a plurality of second laser emitters 6.

[0059] In the present application, in order to further increase the monitoring range and increase the monitoring accuracy, the first laser detector 1 can also be set to multiple, and the multiple first laser detectors 1 are respectively arranged at the first end a1, and one first laser detector 1 and the corresponding multiple first laser emitters 2 are a group, and the grouped first laser detectors 1 and the first laser emitters 2 do not interfere with each other.

[0060] In order to further increase the monitoring range and increase the monitoring accuracy, the second laser detector 5 can be set to multiple, and the multiple second laser detectors 5 are respectively arranged at the second end a2, and one second laser detector 5 and the corresponding multiple second laser emitters 6 are a group, and the grouped second laser detectors 5 and the second laser emitters 6 do not interfere with each other.

[0061] like Figure 6 and 7 As shown, in some embodiments, the first laser emitter 2 and / or the second laser emitter 6 is provided with a collimating lens 7 .

[0062] In the present application, by adding a collimating lens 7 to the first laser emitter 2 and the second laser emitter 6, the divergence angle of the laser can be reduced, thereby increasing the area of ​​laser alarm detection and further expanding the distance of the monitored area a.

[0063] Specifically, the collimating lens 7 may be two convex lenses packaged together, or a combination of concave and convex lenses.

[0064] The laser alarm monitoring system receives laser beams emitted by multiple first laser emitters 2 through the first laser detector 1. If an invading object blocks the laser beam emitted by any first laser emitter 2, the laser power density received by the first laser detector 1 will decrease, thereby triggering the alarm 4 through the controller 3 to sound an alarm, which can effectively improve the accuracy of long-distance detection while reducing costs.

[0065] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0066] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0067] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A laser alarm monitoring system, characterized in that: include: A first laser detector (1) is arranged at a first end of the area to be monitored; A plurality of first laser emitters (2) are arranged at a second end of the area to be monitored, the second end being opposite to the first end, and at least part of the laser beams emitted by the plurality of first laser emitters (2) are emitted into the first laser detector (1); A controller (3) electrically connected to the first laser detector (1); An alarm (4) electrically connected to the controller (3); a second laser detector (5), arranged at the second end of the area to be monitored and staggered with the first laser detector (1), the second laser detector (5) being electrically connected to the controller (3); and A plurality of second laser emitters (6) are arranged at the first end of the area to be monitored, and at least part of the laser beams emitted by the plurality of second laser emitters (6) are emitted into the second laser detector (5).

2. The laser alarm monitoring system according to claim 1, characterized in that: The sum of the power densities of the laser beams emitted by the plurality of the first laser emitters (2) entering the first laser detector (1) is P1, and the alarm threshold of the first laser detector (1) triggering the alarm (4) is P2, wherein P2 = P1 - P3, and P3 is an error value.

3. The laser alarm monitoring system according to claim 2, characterized in that: A plurality of the first laser emitters (2) are arranged at intervals along a first direction at the second end of the area to be monitored.

4. The laser alarm monitoring system according to claim 2, characterized in that: A plurality of the first laser emitters (2) are distributed in a matrix at the second end of the area to be monitored.

5. The laser alarm monitoring system according to claim 1, characterized in that: The sum of the power densities of the laser beams emitted by the plurality of the second laser emitters (6) entering the second laser detector (5) is P4, and the alarm threshold of the second laser detector (5) triggering the alarm (4) is P5, wherein P5 = P4 - P6, and P6 is an error value.

6. The laser alarm monitoring system according to claim 5, characterized in that: A plurality of the second laser emitters (6) are arranged at intervals along a first direction at the first end of the area to be monitored.

7. The laser alarm monitoring system according to claim 5, characterized in that: A plurality of the second laser emitters (6) are distributed in a matrix at the first end of the area to be monitored.

8. The laser alarm monitoring system according to claim 1, characterized in that: The first end of the area to be monitored is provided with a plurality of the first laser detectors (1), and the plurality of the first laser detectors (1) respectively correspond to the plurality of the first laser emitters (2); and / or The second end of the area to be monitored is provided with a plurality of the second laser detectors (5), and the plurality of the second laser detectors (5) respectively correspond to the plurality of the second laser emitters (6).

9. The laser alarm monitoring system according to claim 1, characterized in that: The first laser emitter (2) and / or the second laser emitter (6) is provided with a collimating lens (7).

Images