Wading behavior early warning method for pedestrians in park

Abstract

The invention relates to the technical field of early warning, in particular to a park pedestrian wading behavior early warning method, which comprises the steps of selecting a warning area between a water area and a non-water area in a park; an audible and visual alarm, a laser tracker and a millimeter wave radar are arranged in the warning area; the millimeter-wave radar transmits frequency-modulated continuous waves, and lower limb motion characteristics of pedestrians in a warning area are identified by analyzing an echo micro-Doppler effect; after the lower limb motion characteristics are identified, an audible and visual alarm is used for warning or a laser tracker is used for tracking and marking; according to the invention, the millimeter-wave radar is adopted and is not easily influenced by weather, the lower limb characteristics of pedestrians can be stably captured in a complex environment, people and animals can be distinguished, and the detection accuracy is improved; by adopting the laser tracker, highlight can be formed, and first aid or target searching is facilitated; through identification of several typical dangerous behaviors by the millimeter wave radar, difficulty of water area management of the park can be reduced, and rapid danger identification and early warning are realized.

Description

Technical Field

[0001] This invention relates to the field of early warning technology, specifically to a method for early warning of pedestrian wading behavior in a park. Background Technology

[0002] Because existing industrial parks often include water areas to meet production or landscaping needs, these areas are mostly open and have stable water levels. However, pedestrians frequently wade, play, and fish in these waters, leading to various dangers, especially at night when pedestrians are intoxicated. This poses a significant risk and necessitates early warning systems to prevent accidents. Current technologies rely on cameras or surveillance, but these are insufficient in rainy weather or low visibility conditions. Furthermore, traditional monitoring systems, which target water surface dynamics, are susceptible to false alarms caused by animal interference, resulting in wasted rescue resources. Therefore, this paper proposes a method for early warning of pedestrian wading behavior in industrial parks that avoids the influence of weather and animal factors. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a method for early warning of pedestrian wading behavior in parks that can avoid the influence of weather and animals.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A method for early warning of pedestrian wading behavior in a park includes: The water and non-water areas within the park are selected, and the boundary line between the water and non-water areas is selected as the first warning line. The first warning line is extended a predetermined distance into the non-water area as the second warning line. The area between the first and second warning lines is the warning zone. The warning zone includes the first and second warning lines. Within the restricted area, there are several audible and visual alarms, several laser trackers, and multiple millimeter-wave radars. The multiple millimeter-wave radars are positioned facing the restricted area and are evenly distributed along the first and / or second warning lines. The millimeter-wave radars emit frequency-modulated continuous waves and identify the lower limb movement characteristics of pedestrians within the restricted area by analyzing the echo micro-Doppler effect. Identifying lower limb motor features includes: When a pedestrian's lower limbs cross the second warning line, a level three warning will be issued using an audible and visual alarm. When a pedestrian's lower limbs cross the first warning line, a laser tracker is used to track and mark them, an audible and visual alarm is used to issue a level one warning, and a wading signal is sent to park staff. Further identification of lower limb movement characteristics when pedestrians are within the restricted area includes: If a pedestrian's cadence exceeds 2Hz, the difference in stride length between left and right is greater than 15cm, or the fluctuation of the pedestrian's center of gravity is less than 3cm, a second-level warning will be issued using an audible and visual alarm. If the difference in stride length between left and right is greater than 15cm, a laser tracker will be used to track and mark the pedestrian and issue a first-level warning signal to the park staff.

[0005] Preferably, multiple streetlights are installed within the warning zone; The millimeter-wave radar, audible and visual alarm, and laser tracker are installed on the streetlights. Different millimeter-wave radars are located on different streetlights, and the millimeter-wave radars are installed at the same height. When the millimeter-wave radar, audible and visual alarm, and laser tracker are located on the same streetlight, the millimeter-wave radar, audible and visual alarm, and laser tracker are installed sequentially from bottom to top.

[0006] Preferably, the street light is further provided with a first speaker and a first microphone; The park includes a monitoring room, which is equipped with a second speaker and a second microphone. The first speaker is communicatively connected to the second microphone, and the second speaker is communicatively connected to the first microphone.

[0007] Preferably, further identification of lower limb movement characteristics when the pedestrian is within the warning zone includes: When a pedestrian's lower limb length is less than or equal to 80cm, a second warning signal is issued to park staff.

[0008] Preferably, when a pedestrian's lower limb length is less than or equal to 80cm, it is considered that the child is approaching the water. After issuing a second warning signal to the park staff, the park staff will use a second microphone to persuade the child through the first loudspeaker and at the same time send other park staff to the warning area where the child is located.

[0009] Preferably, the street light is also equipped with a communication button switch for communication connection between the first microphone and the second speaker.

[0010] Preferably, the communication button switch is red and there are multiple such switches, which are evenly distributed within a height range of 60cm-150cm on the outer wall of the street light.

[0011] Preferably, the street light is also equipped with a camera.

[0012] Preferably, if a pedestrian fails to leave the restricted area after a Level 3 or Level 2 warning is issued, a first warning signal is sent to the park staff.

[0013] Preferably, when multiple Level 3 warnings, Level 2 warnings, and Level 1 warnings exist simultaneously, the audible and visual alarm and the laser tracker will prioritize executing the Level 1 warning.

[0014] The beneficial effects of this invention are as follows: By employing millimeter-wave radar, it is less affected by weather, especially rainy days and nights, overcoming the problem that existing cameras and infrared cameras cannot identify pedestrians in rainy weather. It can stably capture pedestrian lower limb features in complex environments, distinguishing between humans and animals, thus improving detection accuracy. It can respond promptly and issue an alarm when a pedestrian crosses the first and second warning lines. The use of a laser tracker creates a bright spot, facilitating subsequent emergency response or target location. Further judgment is added within the warning zone: if a pedestrian's cadence exceeds 2Hz (more than two steps per second), they are considered to be walking or running quickly. High-speed movement near the water's edge increases the risk of falling into the water, requiring a second-level alarm. Furthermore, the pedestrian's center of gravity fluctuation is less than 3cm, while the normal fluctuation is generally 5-8cm. A heart rate fluctuation of less than 3cm indicates a person is carrying heavy loads, typically anglers or picnickers who need to carry fishing gear or heavy food. These individuals, as well as those engaging in physical activity, are usually conscious, and a level two warning from the audible and visual alarm is sufficient. However, a stride difference of more than 15cm between the left and right sides strongly suggests that the pedestrian is likely intoxicated. Audible and visual alarms may not be effective on intoxicated individuals, so special attention is required. An additional laser tracker is also needed to facilitate the timely arrival of park staff after receiving the initial warning signal and removing the person from the scene. Using millimeter-wave radar to identify several typical dangerous behaviors can significantly reduce the difficulty of managing the waterways in the park, enabling rapid identification of dangers and early warning. Multiple millimeter-wave radars combined with several audible and visual alarms and laser trackers are recommended. While more millimeter-wave radars are needed for early warning, only one audible and visual alarm or laser tracker is required at a minimum. Attached Figure Description

[0015] Figure 1 This invention provides a specific embodiment of a method for early warning of pedestrian wading behavior in a park, which defines the water area, warning zone, and non-water area. Figure 2 A schematic diagram of the street light structure used in a pedestrian wading behavior early warning method in a park, as described in a specific embodiment of the present invention; Labeling Explanation: 1. Water area; 2. Non-water area; 3. First warning line; 4. Second warning line; 5. Warning zone; 6. Audible and visual alarm; 7. Laser tracker; 8. Millimeter-wave radar; 9. Street light; 10. Communication button switch; 11. Camera. Detailed Implementation

[0016] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0017] Please refer to Figure 1 as well as Figure 2A method for early warning of pedestrian wading behavior in a park, including: A water area 1 and a non-water area 2 within the park are selected. The boundary line between the water area 1 and the non-water area 2 is selected as the first warning line 3, and the first warning line 3 is extended a predetermined distance towards the non-water area 2 as the second warning line 4. The area between the first warning line 3 and the second warning line is the warning zone 5. The warning zone 5 includes the first warning line 3 and the second warning line. Within the warning zone 5, there are several audible and visual alarms 6, several laser trackers 7, and multiple millimeter-wave radars 8. The multiple millimeter-wave radars 8 are positioned facing the warning zone 5 and are evenly distributed on the first warning line 3 and / or the second warning line. The millimeter-wave radars 8 emit frequency-modulated continuous waves and identify the lower limb movement characteristics of pedestrians within the warning zone 5 by analyzing the echo micro-Doppler effect. Identifying lower limb motor features includes: When a pedestrian's lower limbs cross the second warning line, use the audible and visual alarm 6 to issue a level three warning; When a pedestrian's lower limbs cross the first warning line 3, the laser tracker 7 is used to track and mark the pedestrian, the sound and light alarm 6 is used to issue a first-level warning, and a wading signal is sent to the park staff. When a pedestrian is within warning zone 5, further identification of lower limb movement characteristics is performed, including: If a pedestrian's cadence exceeds 2Hz, the difference in stride length between the left and right sides is greater than 15cm, or the fluctuation of the pedestrian's center of gravity is less than 3cm, the audible and visual alarm 6 will be used to issue a level two warning. If the difference in stride length between the left and right sides is greater than 15cm, the laser tracker 7 will be used to track and mark the pedestrian and issue a first warning signal to the park staff.

[0018] As described above, by employing millimeter-wave radar 8, it is less affected by weather, especially rainy days and nights, overcoming the problem that existing cameras and infrared cameras cannot identify pedestrians in rainy weather. It can stably capture the lower limb features of pedestrians in complex environments, distinguish between humans and animals, and improve detection accuracy. It can respond and alarm in a timely manner once a pedestrian crosses the first warning line 3 and the second warning line. By using laser tracker 7, it can form a bright spot, which facilitates subsequent emergency rescue or target locating by staff. Further judgment is added within the warning zone 5. When the pedestrian's step frequency exceeds 2Hz, that is, the pedestrian takes more than two steps per second, it is a person walking or running fast. If the person is moving at high speed and is close to the edge of the water area 1, they are likely to fall into the water if they lose their footing, requiring a second-level alarm. The pedestrian's center of gravity fluctuation is less than 3cm, while the normal center of gravity fluctuation is generally 5-8cm. A stride difference of less than 3cm indicates the person is carrying a heavy load, typically fishermen or picnickers who need to carry fishing gear or heavy food. These individuals and those engaging in physical activity are usually conscious, and a level two warning from the audible and visual alarm 6 is sufficient. However, a stride difference of more than 15cm indicates the pedestrian is highly likely to be intoxicated. The audible and visual alarm 6 may not be effective on intoxicated individuals, so special attention is required. An additional laser tracker 7 is also needed to facilitate the arrival of park staff after receiving the initial warning signal and removing the person from the scene. The identification of several typical dangerous behaviors by millimeter-wave radar 8 can greatly reduce the difficulty of managing the water area 1 within the park, enabling rapid identification of dangers and early warning. Multiple millimeter-wave radars 8 combined with several audible and visual alarms 6 and laser trackers 7 are used. Because more millimeter-wave radars 8 are needed to achieve early warning, only one audible and visual alarm 6 and one laser tracker 7 are required.

[0019] Furthermore, multiple streetlights 9 are installed within the warning zone 5; The millimeter-wave radar 8, the audible and visual alarm 6, and the laser tracker 7 are installed on the street light 9. Different millimeter-wave radars 8 are located on different street lights 9, and the millimeter-wave radars 8 are installed at the same height. When the millimeter-wave radar 8, the audible and visual alarm 6, and the laser tracker 7 are located on the same street light 9, the millimeter-wave radar 8, the audible and visual alarm 6, and the laser tracker 7 are installed sequentially from bottom to top.

[0020] As can be seen from the above description, by integrating the millimeter-wave radar 8, the sound and light alarm 6, and the laser tracker 7 onto the street light 9, the difficulty of deployment can be reduced, and management can be made easier. Furthermore, the millimeter-wave radar 8 is the lowest, which can easily capture the lower limb characteristics and center of gravity change characteristics of pedestrians, while the laser tracker 7 is the highest, which is to facilitate tracking and reduce obstruction.

[0021] Furthermore, the street light 9 is also equipped with a first speaker and a first microphone; The park includes a monitoring room, which is equipped with a second speaker and a second microphone. The first speaker is communicatively connected to the second microphone, and the second speaker is communicatively connected to the first microphone.

[0022] As described above, the communication between the first speaker and the second microphone, and the second speaker and the first microphone, facilitates communication between the restricted area 5 and the monitoring room.

[0023] Furthermore, when a pedestrian is within warning zone 5, further identification of lower limb movement characteristics includes: When a pedestrian's lower limb length is less than or equal to 80cm, a second warning signal is issued to park staff.

[0024] As can be seen from the above description, when the length of a pedestrian's lower limbs is less than or equal to 80cm, those with shorter lower limbs are generally children. Children's behavior is more random, and they are more likely to wade and play in water, making human supervision more effective.

[0025] Furthermore, when a pedestrian's lower limb length is less than or equal to 80cm, it is considered that the child is approaching the water area 1. After issuing a second warning signal to the park staff, the park staff will use the second microphone to persuade the child through the first loudspeaker and at the same time send other park staff to the warning area 5 where the child is located.

[0026] As described above, by giving children verbal guidance, it is possible to prevent them from being frightened when the sound and light alarm 6 goes off and causing them to panic and run into water.

[0027] Furthermore, the street light 9 is also equipped with a communication button switch 10 for communication connection between the first microphone and the second speaker.

[0028] As described above, by setting up the communication button switch 10, in the event of a water accident, pedestrians or companions of those wading in the water can directly press the communication button switch 10 to make an emergency contact with staff in the park, facilitating a rapid response and rescue.

[0029] Furthermore, the communication button switch 10 is red and there are multiple of them, and the multiple communication button switches 10 are evenly distributed in the height range of 60cm-150cm on the outer wall of the street lamp 9.

[0030] As described above, the communication button switch 10 is red and there are multiple of them, distributed along the height, which makes it convenient for children and adults to sound an alarm when wading in water, avoiding the problem of difficulty in sounding the alarm due to unsuitable height.

[0031] Furthermore, a camera 11 is also installed on the street light 9.

[0032] As described above, the camera 11 allows for direct observation of the warning zone 5 and the water surface, and can also be used for surveillance.

[0033] Furthermore, if pedestrians still fail to leave the restricted area 5 after a Level 3 or Level 2 warning has been issued, a first warning signal will be sent to park staff.

[0034] As can be seen from the above description, if the level 2 and level 3 warnings are ineffective, the only option is to issue a first warning signal to the park staff and manually manage the eviction process.

[0035] Furthermore, when multiple Level 3, Level 2, and Level 1 warnings exist simultaneously, the audible and visual alarm 6 and the laser tracker 7 will prioritize executing the Level 1 warning.

[0036] As described above, when multiple warnings are received, the first-level warning is executed directly because it is more urgent, thus avoiding conflicts between multiple warnings that could cause the warnings to become ineffective.

[0037] Example 1 A method for early warning of pedestrian wading behavior in a park includes: Select water area 1 and non-water area 2 within the park, and select the boundary line between water area 1 and non-water area 2 as the first warning line 3. Extend the first warning line 3 a predetermined distance (3-10 meters) towards the non-water area 2 as the second warning line 4. The area between the first warning line 3 and the second warning line is the warning zone 5. The warning zone 5 includes the first warning line 3 and the second warning line. Within the warning zone 5, there are several audible and visual alarms 6, several laser trackers 7, and multiple millimeter-wave radars 8. The multiple millimeter-wave radars 8 are positioned facing the warning zone 5 and are evenly distributed on the first warning line 3 and / or the second warning line. The millimeter-wave radars 8 emit frequency-modulated continuous waves and identify the lower limb movement characteristics of pedestrians within the warning zone 5 by analyzing the echo micro-Doppler effect. Identifying lower limb motor features includes: When a pedestrian's lower limbs cross the second warning line, use the audible and visual alarm 6 to issue a level three warning; When a pedestrian's lower limbs cross the first warning line 3, the laser tracker 7 is used to track and mark the pedestrian, the sound and light alarm 6 is used to issue a first-level warning, and a wading signal is sent to the park staff. When a pedestrian is within warning zone 5, further identification of lower limb movement characteristics is performed, including: If a pedestrian's cadence exceeds 2Hz, the difference in stride length between the left and right sides is greater than 15cm, or the fluctuation of the pedestrian's center of gravity is less than 3cm, the audible and visual alarm 6 will be used to issue a level two warning. If the difference in stride length between the left and right sides is greater than 15cm, the laser tracker 7 will be used to track and mark the pedestrian and issue a first warning signal to the park staff.

[0038] Multiple streetlights 9 are installed within the restricted area 5; The millimeter-wave radar 8, the audible and visual alarm 6, and the laser tracker 7 are installed on the streetlights 9. Different millimeter-wave radars 8 are located on different streetlights 9, and the millimeter-wave radars 8 are installed at the same height. When the millimeter-wave radar 8, the audible and visual alarm 6, and the laser tracker 7 are located on the same streetlight 9, they are arranged sequentially from bottom to top. The height of the millimeter-wave radar 8 from the ground is 40-50cm, the height of the audible and visual alarm 6 from the ground is 250-300cm (which can also be adjusted according to the actual height of the streetlight 9), and the height of the laser tracker 7 from the ground is above the audible and visual alarm 6 or at the top of the streetlight 9 where the field of view is open (which can also be adjusted according to the actual height of the streetlight 9). The position of the camera 11 is also above the audible and visual alarm 6 or at the top of the streetlight 9 where the field of view is open (which can also be adjusted according to the actual height of the streetlight 9).

[0039] The street light 9 is also equipped with a camera 11.

[0040] If pedestrians still fail to leave the restricted area after a Level 3 or Level 2 warning has been issued, the first warning signal will be sent to the park staff.

[0041] When multiple Level 3, Level 2, and Level 1 warnings exist simultaneously, the audible and visual alarm 6 and the laser tracker 7 prioritize the execution of the Level 1 warning. The difference between Level 3, Level 2, and Level 1 warnings lies in the different content they involve.

[0042] Example 2 A method for early warning of pedestrian wading behavior in a park is similar to that in Example 1, and will not be repeated here. The difference is that: The street light 9 is also equipped with a first speaker and a first microphone; The park includes a monitoring room, which is equipped with a second speaker and a second microphone. The first speaker is communicatively connected to the second microphone, and the second speaker is communicatively connected to the first microphone.

[0043] When a pedestrian is within warning zone 5, further identification of lower limb movement characteristics is performed, including: When a pedestrian's lower limb length is less than or equal to 80cm, a second warning signal is issued to park staff.

[0044] When a pedestrian's lower limb length is less than or equal to 80cm, it is considered that the child is approaching the water area 1. After issuing a second warning signal to the park staff, the park staff will use the second microphone to persuade the child through the first loudspeaker and at the same time send other park staff to the warning area 5 where the child is located.

[0045] The street light 9 is also equipped with a communication button switch 10 for communication connection between the first microphone and the second speaker.

[0046] The communication button switch 10 is red and there are multiple of them. The multiple communication button switches 10 are evenly distributed in the height range of 60cm-150cm on the outer wall of the street lamp 9.

[0047] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for early warning of pedestrian wading behavior in a park, characterized in that, include: The water and non-water areas within the park are selected, and the boundary line between the water and non-water areas is selected as the first warning line. The first warning line is extended a predetermined distance into the non-water area as the second warning line. The area between the first and second warning lines is the warning zone. The warning zone includes the first and second warning lines. Within the restricted area, there are several audible and visual alarms, several laser trackers, and multiple millimeter-wave radars. The multiple millimeter-wave radars are positioned facing the restricted area and are evenly distributed along the first and / or second warning lines. The millimeter-wave radars emit frequency-modulated continuous waves and identify the lower limb movement characteristics of pedestrians within the restricted area by analyzing the echo micro-Doppler effect. Identifying lower limb motor features includes: When a pedestrian's lower limbs cross the second warning line, a level three warning will be issued using an audible and visual alarm. When a pedestrian's lower limbs cross the first warning line, a laser tracker is used to track and mark them, an audible and visual alarm is used to issue a level one warning, and a wading signal is sent to park staff. Further identification of lower limb movement characteristics when pedestrians are within the restricted area includes: If a pedestrian's cadence exceeds 2Hz, the difference in stride length between left and right is greater than 15cm, or the fluctuation of the pedestrian's center of gravity is less than 3cm, a second-level warning will be issued using an audible and visual alarm. If the difference in stride length between left and right is greater than 15cm, a laser tracker will be used to track and mark the pedestrian and issue a first-level warning signal to the park staff.

2. The method for early warning of pedestrian wading behavior in a park according to claim 1, characterized in that, Multiple streetlights are installed within the restricted area; The millimeter-wave radar, audible and visual alarm, and laser tracker are installed on the streetlights. Different millimeter-wave radars are located on different streetlights, and the millimeter-wave radars are installed at the same height. When the millimeter-wave radar, audible and visual alarm, and laser tracker are located on the same streetlight, the millimeter-wave radar, audible and visual alarm, and laser tracker are installed sequentially from bottom to top.

3. The method for early warning of pedestrian wading behavior in a park according to claim 2, characterized in that, The streetlight is also equipped with a first speaker and a first microphone; The park includes a monitoring room, which is equipped with a second speaker and a second microphone. The first speaker is communicatively connected to the second microphone, and the second speaker is communicatively connected to the first microphone.

4. The method for early warning of pedestrian wading behavior in a park according to claim 3, characterized in that, Further identification of lower limb movement characteristics when pedestrians are within the restricted area includes: When a pedestrian's lower limb length is less than or equal to 80cm, a second warning signal is issued to park staff.

5. The method for early warning of pedestrian wading behavior in a park according to claim 4, characterized in that, When a pedestrian's lower limb length is less than or equal to 80cm, it is considered that the child is approaching the water. After issuing a second warning signal to the park staff, the park staff will use a second microphone to persuade the child through the first loudspeaker and at the same time send other park staff to the warning area where the child is located.

6. The method for early warning of pedestrian wading behavior in a park according to claim 3, characterized in that, The streetlight is also equipped with a communication button switch for communication connection between the first microphone and the second speaker.

7. The method for early warning of pedestrian wading behavior in a park according to claim 6, characterized in that, The communication button switches are red and there are multiple of them. The multiple communication button switches are evenly distributed within a height range of 60cm-150cm on the outer wall of the street light.

8. The method for early warning of pedestrian wading behavior in a park according to claim 3, characterized in that, The streetlights are also equipped with cameras.

9. The method for early warning of pedestrian wading behavior in a park according to claim 1, characterized in that, If pedestrians fail to leave the restricted area after a Level 3 or Level 2 warning has been issued, the first warning signal will be sent to park staff.

10. The method for early warning of pedestrian wading behavior in a park according to claim 1, characterized in that, When multiple Level 3, Level 2, and Level 1 warnings exist simultaneously, the audible and visual alarm and the laser tracker will prioritize executing the Level 1 warning.

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