Electronic fence-based monitoring method

Abstract

The application provides a monitoring method based on an electronic fence, which comprises the following steps: forming a traffic cone area by a plurality of traffic cones provided with UWB base stations, and defining an electronic fence area by signals of broadcast information of the UWB base stations, so as to serve as the traffic cone area; providing a tag device for personnel and construction vehicles; receiving personnel position information and vehicle position information sent by each tag device by the UWB base station, so as to determine characteristic information of the personnel and / or the construction vehicles in real time; and performing matching verification according to the determined characteristic information of the personnel and / or the construction vehicles, and judging whether the personnel and / or the construction vehicles are in the traffic cone area. The application can more effectively and intelligently monitor real-time dynamic and position information of personnel in a construction site or a maintenance site, and can more effectively guarantee the safety of the personnel and maintenance vehicles in the construction site or the maintenance site by judging whether the determined position of the personnel or the vehicle is in the traffic cone area, and issuing an alarm warning for prompting.

Description

Technical Field

[0001] This invention relates to the field of security management technology, and specifically to a monitoring method based on electronic fences. Background Technology

[0002] Road maintenance or highway repair work is mostly carried out in high-traffic, high-speed environments, making the safety of on-site maintenance personnel a major challenge in road maintenance management. There is an urgent need for a management system that can ensure personnel safety. In general, this need includes personnel and vehicle attendance tracking, location tracking, optimized deployment, disaster relief, and daily management. The core of fulfilling these management needs is real-time personnel tracking and location. Traditional RFID and WiFi technologies can locate on-site construction personnel within a certain range, but they cannot provide project managers with the precise location of construction personnel in real time, leading to loopholes in on-site project management.

[0003] Traffic cones, also known as cone-shaped traffic signs, are generally used during construction projects and in the event of accidents to alert road users and ensure the safety of construction workers and road users. They can also be used for traffic diversion, separation of pedestrian and vehicle traffic, or merging. Vehicle-to-everything (V2X) technology, representing shared resources, is an emerging Internet of Things (IoT) technology that has gained market popularity due to its low cost, low power consumption, and short construction period.

[0004] However, the traffic and pedestrian flow at road maintenance sites are complex, and simply placing traffic cones physically is insufficient to provide a true warning. Furthermore, current technologies cannot monitor the real-time movements of personnel at the construction site, nor can they track their location. In addition, there is still significant room for improvement in areas such as how to better apply IoT technology to traffic cone fencing, high-precision positioning, and addressing the impact of signal transmission reliability on positioning accuracy and data accuracy.

[0005] Therefore, it is necessary to provide a monitoring method based on electronic fences to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to solve the technical problems in the prior art, such as the inability to monitor the real-time dynamics of personnel on construction sites, the inability to grasp the location information of personnel on site, and how to better apply Internet of Things technology to the field of traffic cones and fences.

[0007] This invention provides a monitoring method based on an electronic fence, comprising: forming a traffic cone area by using multiple traffic cones equipped with UWB base stations; defining the electronic fence area by the signals of information broadcast by the UWB base stations as the traffic cone area; equipping personnel and construction vehicles with tagging devices; receiving personnel location information and vehicle location information sent by each tagging device through the UWB base station to determine the characteristic information of personnel and / or construction vehicles in real time; performing matching verification based on the determined characteristic information of personnel and / or construction vehicles, and determining whether they are within the traffic cone area.

[0008] According to an optional embodiment of the present invention, an electronic fence area is defined by the signals broadcast by UWB base stations spaced apart and forming a triangle. The information broadcast by the UWB base stations includes location information, authentication information, fence feature information, and transmission power. The locatable area of ​​the electronic fence is defined by a circular area formed with each UWB base station as the center and a specified radius R.

[0009] According to an optional embodiment of the present invention, the distance between any two adjacent UWB base stations is 10m to 30m.

[0010] According to an optional embodiment of the present invention, the step of matching and verifying the characteristic information of the determined personnel and / or construction vehicles and determining whether they are within the traffic cone area includes: matching and verifying the tag information in the characteristic information of the determined personnel and / or construction vehicles with preset tag information; and determining whether the location information in the characteristic information of the determined personnel and / or construction vehicles is within the traffic cone area.

[0011] According to an optional embodiment of the present invention, the step of receiving personnel location information and vehicle location information sent by each tag device through the UWB base station to determine the characteristic information of personnel and / or construction vehicles in real time includes: when the identity verification information in the characteristic information of the determined personnel and / or construction vehicles matches the preset identification information, the following steps are performed to determine the location information of personnel and / or construction vehicles in real time: acquiring the location information of the UWB base station; parsing the signal strength corresponding to each of the acquired location information, and sorting all location information according to the magnitude of the signal strength; selecting a predetermined number of valid location information that ranks first from the multiple location information.

[0012] According to an optional embodiment of the present invention, the method further includes: determining the signal strength attenuation value corresponding to each of the selected predetermined number of valid location information; and determining the position of the personnel and vehicles based on the selected predetermined number of valid location information and their corresponding signal strength attenuation values.

[0013] According to an optional embodiment of the present invention, when the determined location of personnel and / or construction vehicles exceeds the traffic cone area, the traffic cone issues an alarm warning, and the tag devices carried by the personnel and vehicles issue an alarm warning.

[0014] According to an optional embodiment of the present invention, when the determined location of personnel and / or construction vehicles exceeds the traffic cone area, a site violation record report is generated and the violation record report is sent to the management server. The violation record report includes the location information and identification information of the personnel and vehicles, as well as the identification information of the electronic fence where the personnel and vehicles are located.

[0015] According to an optional embodiment of the present invention, equipping personnel and construction vehicles with tagging devices includes: equipping construction personnel and construction vehicles with a first tagging device and a second tagging device respectively, and identifying each construction personnel and construction vehicle in a background processing center to form corresponding preset identification information for matching with real-time monitored identity tag information or vehicle tag information, wherein each construction personnel and construction vehicle is associated with the first tagging device and the second tagging device.

[0016] According to an optional embodiment of the present invention, the method further includes: visually displaying the movement of construction workers and construction vehicles within the traffic cone area to determine whether they have exceeded the traffic cone area.

[0017] Beneficial effects

[0018] Compared with existing technologies, this invention forms a traffic cone area by installing multiple traffic cones equipped with UWB base stations. The electronic fence area defined by the signals broadcast by the UWB base stations serves as the traffic cone area, improving signal transmission reliability and more accurately defining traffic cone areas used for construction or maintenance. By receiving personnel and vehicle location information from various tag devices through the UWB base stations, the feature information of personnel and / or construction vehicles can be determined in real time, enabling more accurate and immediate location determination. Matching and verification are performed based on the determined feature information of personnel and / or construction vehicles to determine whether they are within the traffic cone area. This allows for more effective and intelligent monitoring of the real-time dynamics and location information of personnel at construction or maintenance sites, effectively avoiding problems such as reduced positioning accuracy caused by factors such as antenna array position, signal transmission obstruction by buildings or other objects, and non-line-of-sight environments. By determining whether the determined personnel or vehicle location is within the traffic cone area, an alarm warning is issued, further ensuring the safety of personnel and maintenance vehicles at construction or maintenance sites. Attached Figure Description

[0019] To make the technical problems solved by the present invention, the technical means adopted, and the technical effects achieved clearer, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it should be noted that the drawings described below are merely drawings of exemplary embodiments of the present invention. Those skilled in the art can obtain drawings of other embodiments based on these drawings without any creative effort.

[0020] Figure 1 This is a flowchart illustrating an example of the electronic fence-based monitoring method of the present invention.

[0021] Figure 2 This is a schematic diagram of an example of a traffic area where the electronic fence-based monitoring method of the present invention is applied.

[0022] Figure 3 This is a schematic diagram of an example of a traffic cone area formed by an electronic fence in a construction area where the electronic fence-based monitoring method of the present invention is applied.

[0023] Figure 4 This is a schematic diagram of the traffic cone area from another angle in the electronic fence-based monitoring method of the present invention.

[0024] Figure 5 This is a partial external schematic diagram of the base station module in the electronic fence-based monitoring method of the present invention.

[0025] Figure 6 This is a schematic diagram of the process for selecting a predetermined number of valid location information for personnel and / or vehicles in the electronic fence-based monitoring method of the present invention.

[0026] Figure 7 This is a schematic diagram illustrating an example of using the electronic fence-based monitoring method of the present invention to determine the location of a person. Detailed Implementation

[0027] Exemplary embodiments of the invention will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limiting the invention to the embodiments set forth herein. Rather, these exemplary embodiments are provided to make the invention more comprehensive and complete, and to facilitate a full communication of the inventive concept to those skilled in the art. The same reference numerals in the drawings denote the same or similar elements, components, or parts, and therefore repeated descriptions of them will be omitted.

[0028] Subject to the technical concept of this invention, the features, structures, characteristics or other details described in a particular embodiment may be combined in one or more other embodiments in a suitable manner.

[0029] In the description of specific embodiments, the features, structures, characteristics, or other details described in this invention are intended to enable those skilled in the art to fully understand the embodiments. However, it is not excluded that those skilled in the art can practice the technical solutions of this invention without one or more of the specific features, structures, characteristics, or other details.

[0030] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0031] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0032] It should be understood that although terms such as "first," "second," "third," etc., indicating designations, may be used herein to describe various devices, elements, components, or parts, this should not be limited by these terms. These terms are used to distinguish one from another. For example, a first device may also be referred to as a second device without departing from the essential technical solution of this invention.

[0033] The terms “and / or” or “and / or” include any one or more of the listed items in relation to each other and all combinations thereof.

[0034] In view of the above problems, the present invention provides a monitoring method based on electronic fences. This method forms a traffic cone area by installing multiple traffic cones equipped with UWB base stations. The electronic fence area defined by the signals broadcast by the UWB base stations serves as the traffic cone area, improving signal transmission reliability and more accurately defining the traffic cone area used for construction or maintenance. The UWB base stations receive personnel and vehicle location information sent by various tag devices to determine the characteristic information of personnel and / or construction vehicles in real time, enabling more accurate and immediate location determination. Based on the determined characteristic information of personnel and / or construction vehicles, matching and verification are performed to determine whether they are within the traffic cone area. This provides more effective and intelligent monitoring of the real-time dynamics and location information of personnel at construction or maintenance sites, effectively avoiding problems such as reduced positioning accuracy caused by factors such as antenna array position, signal transmission obstruction by buildings, and non-line-of-sight environments. By determining whether the determined personnel or vehicle location is within the traffic cone area, an alarm warning is issued, more effectively ensuring the safety of personnel and maintenance vehicles at construction or maintenance sites.

[0035] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0036] Example 1

[0037] The following will refer to Figures 1 to 6 This invention describes embodiments of the electronic fence-based monitoring method.

[0038] Figure 1 This is a flowchart illustrating an example of the electronic fence-based monitoring method of the present invention.

[0039] like Figure 1 As shown, the monitoring method includes the following steps.

[0040] Step S101: A traffic cone area is formed by multiple traffic cones equipped with UWB base stations, and an electronic fence area defined by the signal of the information broadcast by the UWB base stations is used as the traffic cone area.

[0041] Step S102: Equip personnel and construction vehicles with labeling devices.

[0042] Step S103: Receive personnel location information and vehicle location information sent by each tag device through the UWB base station to determine the characteristic information of personnel and / or construction vehicles in real time.

[0043] Step S104: Based on the characteristic information of the identified personnel and / or construction vehicles, perform matching verification and determine whether they are within the traffic cone area.

[0044] Figure 2 This is a schematic diagram illustrating an example of the electronic fence-based monitoring method of the present invention. The following will be combined with... Figure 2 The examples illustrate the electronic fence-based monitoring method of the present invention in detail.

[0045] First, in step S101, a traffic cone area is formed by multiple traffic cones equipped with UWB base stations, and an electronic fence area defined by the signal of the information broadcast by the UWB base stations is used as the traffic cone area.

[0046] exist Figure 2 In the example shown, multiple traffic cones are placed in the construction or maintenance areas of highways, railways, bridges, etc., to provide warnings to vehicles and pedestrians.

[0047] Specifically, each of the multiple traffic cones is equipped with a UWB base station to monitor people or vehicles, and to further remind or warn vehicles, pedestrians or other personnel.

[0048] Figure 3 This is a schematic diagram of an example of a traffic cone area formed by an electronic fence in a construction area where the electronic fence-based monitoring method of the present invention is applied. Figure 4 This is a schematic diagram of the traffic cone area from another angle in the electronic fence-based monitoring method of the present invention.

[0049] See Figure 3 and Figure 4 In the construction area (a rectangular area 1000m long and 6m wide), multiple traffic cones are arranged in two rows at equal intervals. Similarly, UWB base stations are arranged in two rows at equal intervals. Thus, the electronic fence area is defined by the signals broadcast from the UWB base stations, which are spaced out and form a triangle. In other words, the electronic fence area, used as a traffic cone area, is defined by the location of the UWB base stations and the signals they broadcast. This improves signal transmission reliability and allows for more precise definition of traffic cone areas used for construction or maintenance.

[0050] It should be noted that the size of the construction area described above is only an optional example and should not be construed as a limitation of the present invention. In other embodiments, the width of the construction area may be 7m, 8m, 9m, or a value between 6m and 10m. The length of the construction area may be 800m, 900m, or a value between 800m and 1000m.

[0051] Specifically, the information broadcast by the UWB base station includes location information, authentication information, fence feature information, and transmission power. Preferably, the fence feature information mainly includes: UWB devices are divided into base station devices, tag devices, etc. Tag devices are distinguished by ID numbers.

[0052] Furthermore, the locatable area of ​​the electronic fence is defined by a circular area centered on each UWB base station and with a specified radius R, as detailed in [reference needed]. Figure 4 .

[0053] Optionally, the distance between any two adjacent UWB base stations is 10m to 30m, that is, the interval distance is 10m to 30m.

[0054] In this embodiment, a safe traffic cone area is defined by an area formed by at least three base stations (e.g., a triangular area formed by base station 1, base station 2, and base station 3), meaning the traffic cone area is formed by multiple triangular areas. However, this is not a limitation. In other embodiments, a quadrilateral area (including trapezoids and parallelograms) formed by four base stations can be used to define or define the traffic cone area, or a pentagonal area formed by five base stations can be used, and so on. The above are merely optional examples and should not be construed as limiting the invention.

[0055] Preferably, the UWB base station further includes a Bluetooth unit for broadcasting Bluetooth signals, wherein the electronic fence is defined by the Bluetooth signal, which can further improve the reliability of signal transmission.

[0056] Optionally, the UWB base station further includes a housing with mounting holes, wherein the UWB base station is mounted to the sensing strip in the traffic cone area through the mounting holes b. For example, the UWB base station is mounted and fixed to the traffic cone by screws a and mounting holes b. See [link to details]. Figure 5 .

[0057] Next, in step S102, tagging devices are provided for personnel and construction vehicles.

[0058] Specifically, a first tag device and a second tag device are provided for construction workers and construction vehicles respectively. The first tag device and the second tag device communicate with UWB base stations deployed at traffic cones to send and receive information data. Specifically, the first tag device and the second tag device send the location information of construction workers (or maintenance personnel) and construction vehicles (or maintenance vehicles) to the UWB base stations. UWB base stations send and receive information data with each other, or UWB base stations can share the received location information of construction workers (or maintenance personnel) and construction vehicles (or maintenance vehicles).

[0059] Furthermore, in the background processing center, each construction worker (or maintenance worker) and construction vehicle (or maintenance vehicle) is identified to form corresponding preset identification information, which is used to match with the identity tag information or vehicle tag information monitored in real time. In this process, each construction worker and construction vehicle is associated with the first tag device and the second tag device.

[0060] In one implementation, a backend processing center, such as a backend or backend system, identifies construction personnel (or maintenance personnel) and construction vehicles (or maintenance vehicles) to form corresponding preset identification information for managing the entry and exit of various personnel or vehicles. For example, construction personnel (or maintenance personnel) are numbered, represented as A = {A1, A2, A3, ..., An}, or ID number. Construction vehicles (or maintenance vehicles) are numbered, represented as B = {B1, B2, B3, ..., Bn}, or ID number.

[0061] Preferably, the preset identification information is used to associate each construction worker and construction vehicle with the first tagging device and the second tagging device for matching and judgment in different situations. For example, situations such as clocking in and out, sick leave, or personal leave.

[0062] It should be noted that, in this embodiment, based on the site conditions, the number of on-site construction personnel (or maintenance personnel) is determined to be no more than 30, and the number of maintenance vehicles is no more than 15. However, this is not the case; in other embodiments, the number of on-site construction personnel (or maintenance personnel) is no more than 50, and the number of maintenance vehicles is no more than 20. The above are merely optional examples and should not be construed as limiting the present invention.

[0063] To avoid issues such as reduced positioning accuracy due to obstructions from buildings or other objects during antenna array placement and signal transmission, and to mitigate the impact of non-line-of-sight environments on the path, and to promptly determine the characteristic information of personnel and / or construction vehicles, UWB base stations deployed at traffic cones are used to receive the location information of each tag device and determine its characteristic information for matching verification. Steps S103 and S104 will be explained in detail below.

[0064] Next, in step S103, the location information of personnel and vehicles sent by each tag device is received through the UWB base station to determine the characteristic information of personnel and / or construction vehicles in real time.

[0065] Specifically, the location information of personnel and vehicles is received by the first tag device and the second tag device through the UWB base station deployed at the traffic cone.

[0066] Furthermore, based on the received personnel and vehicle location information, the characteristic information of personnel and / or construction vehicles is determined in real time. This characteristic information includes location information, identity verification information, vehicle verification information, and fence feature information. Preferably, the fence feature information mainly includes: UWB devices are categorized into base station devices and tag devices. Tag devices are distinguished by ID numbers.

[0067] Specifically, when the identity verification information (or vehicle verification information) in the characteristic information of the identified personnel and / or construction vehicles is successfully matched with the preset identification information, that is, when the background processing center has the corresponding preset identification information, the following steps are executed, as can be found in [reference]. Figure 6 .

[0068] Step S601: Determine the location information of personnel and / or construction vehicles in real time;

[0069] Step S602: Obtain the location information of the UWB base station;

[0070] Step S603: Analyze the signal strength corresponding to each of the acquired location information, and sort all the location information according to the magnitude of the signal strength;

[0071] Step S604: Select a predetermined number of valid location information items that are ranked first from multiple location information items.

[0072] By selecting a predetermined number of valid location information entries from the top of the list through the above steps, the location information of people or vehicles can be determined more accurately and in real time.

[0073] Further, based on the selected predetermined number of valid location information, the signal strength attenuation value corresponding to each of the selected predetermined number of valid location information is determined. Further, based on the selected predetermined number of valid location information and their corresponding signal strength attenuation values, the positions of the personnel and vehicles are determined.

[0074] In one implementation, when the identity verification information in the characteristic information of the identified personnel matches the preset identification information, for example, when the back-end processing center has preset identification information corresponding to the identity verification information of the construction personnel, that is, when the identity verification information of the construction personnel matches the preset identification information, then execution is performed. Figure 6 The steps in the process are to select a predetermined number of valid location information that are ranked first.

[0075] In another implementation, if the identity verification information in the identified person's characteristic information fails to match the preset identification information, no action is taken. Figure 6 The steps in the process directly determine whether the person's location is within the traffic cone area.

[0076] In another implementation, when it is determined that the vehicle verification information in the characteristic information of the construction vehicle matches the preset identification information, the following steps are executed. Figure 6 In the process, a predetermined number of valid location information items that are ranked at the top are selected to further determine whether the vehicle's position is normal.

[0077] In another implementation, if the vehicle verification information in the characteristic information of the construction vehicle fails to match the preset identification information, the operation is not performed. Figure 6 The steps in the process directly determine whether the vehicle's position is within the traffic cone area.

[0078] In another embodiment, the strongest waveform path is selected from the waveform information of the signal transmission waves of the UWB base station in the traffic cone area to determine the location of people or vehicles.

[0079] It should be noted that in this invention, "selecting the strongest waveform path" refers to carefully controlling the relative delay and amplitude between the emitted waves from the wave sources, thereby concentrating the electromagnetic wave radiation energy in one direction (i.e., the location of the receiver), while the electromagnetic wave radiation energy is very small in other locations. The strongest waveform path is the path with the least signal attenuation from the transmitter to the receiver. The direction of antenna radiation can be achieved by changing the relative delay and amplitude between the wave sources to accurately track changes in the relative positions between the transmitter and receiver; see [link to relevant documentation] for details. Figure 7 .

[0080] Figure 7 The process of controlling signals in different directions is shown. Specifically, the signal from the target path is amplified and then the arrival angle is determined according to the information intensity in different directions.

[0081] In this embodiment, the location of a person or vehicle is determined using two UWB base stations. For example, regarding the determination of the location of a person, as shown in the tag section of the diagram, given that the locations of the first and second UWB base stations are known, the signal sent by the personnel device (first tag device) reaches two already located nodes (i.e., the locations of the first and second UWB base stations). The first angle α1 between the line connecting the first UWB base station to the personnel device and the reference direction is drawn, and a ray L1 is drawn based on this direction. Similarly, the second angle α2 between the line connecting the second UWB base station to the first tag device and the reference direction is drawn, and a ray L2 is drawn based on this direction. The intersection of ray L1 and ray L2 is the angular position of arrival of the first tag device.

[0082] Further, a first time difference is calculated between the location information sent to the first UWB base station and the location information received by the first UWB base station; a second time difference is calculated between the information transmission and reception between the first UWB base station and the second UWB base station.

[0083] Preferably, when both the first time difference and the second time difference are minimized, the strongest waveform path among the waveform information of the first UWB base station and the second UWB base station is selected to determine the first distance and the second distance between the person and the first UWB base station and the second UWB base station. Further, the person's position is calculated based on the calculated first distance and the second distance. Specifically, the coordinates of the first UWB base station are denoted as (x1, y1), the coordinates of the second UWB base station are denoted as (x2, y2), and the coordinates of the measured node (i.e., the person's position) are (x, y). Assuming that α1 and α2 are not both 90°, the equations of the two rays are y-y1 = k1(x-x1) and y-y2 = k2(x-x2), respectively, where k1 = tan(α1) and k2 = tan(α2).

[0084]

[0085] Find the coordinates of the intersection point of the two rays:

[0086]

[0087] Specifically, based on the above expression (1), we can solve for the coordinates (x, y) of the person's position.

[0088] In one embodiment, assuming the coordinates of the first UWB base station are (0,0) and the coordinates of the second UWB base station are (1,0), α1 = 30°, α2 = 120°, the specific calculation process is as follows:

[0089] x1=0, y1=0; x2=1, y2=0; α1=30, α2=120; k1=tan(α1 / 180π); k2=tan(α2 / 180π);

[0090] x=(k1x1-k2x2-y1+y2) / (k1-k2), y=(k1k2(x1-x2)-k2y1+k1y2) / (k1-k2)

[0091] The calculation results are x = 0.750 and y = 0.433.

[0092] Therefore, the coordinates of the person's location are (x, y) = (0.75, 0.433).

[0093] It should be noted that since the method for determining the location of vehicles is the same as the method for determining the location of personnel, the explanation of that method is omitted.

[0094] Calculating the location of people or vehicles using the above method can improve the reliability of signal transmission and effectively avoid problems such as reduced positioning accuracy caused by factors such as the location of the antenna array, signal transmission being blocked by buildings, and non-line-of-sight environments.

[0095] It should be noted that the above is only an optional example and should not be construed as a limitation of the present invention.

[0096] Next, in step S104, a matching verification is performed based on the characteristic information of the identified personnel and / or construction vehicles, and it is determined whether they are within the traffic cone area.

[0097] Specifically, the tag information in the characteristic information of the identified personnel and / or construction vehicles is matched and verified with preset tag information, and it is determined whether the location information in the characteristic information of the identified personnel and / or construction vehicles is within the traffic cone area.

[0098] In one embodiment, when the location of a determined person and / or construction vehicle exceeds the traffic cone area, the traffic cone issues an alarm warning, and the tagging devices carried by the person and the vehicle issue an alarm warning.

[0099] In another embodiment, when the location of the identified personnel and / or construction vehicles exceeds the traffic cone area, a site violation record report is generated and sent to the management server. The violation record report includes the location information and identification information of the personnel and vehicles, as well as the identification information of the electronic fence where the personnel and vehicles are located.

[0100] In another embodiment, when personnel (including construction workers, maintenance workers, pedestrians or other personnel) and / or vehicles (including construction vehicles, maintenance vehicles, passing vehicles or other vehicles) move within the traffic cone area, their location information is displayed on the front end of a PC, and it can be directly determined whether they are within the traffic cone area.

[0101] Specifically, when the target personnel (construction workers or maintenance workers) or vehicles (construction vehicles or maintenance vehicles) are not within the traffic cone area, for example, an alarm command is transmitted by the back-end processing center, and an alarm warning is issued by the UWB base station of the traffic cone. At the same time, the construction workers or maintenance workers and the first and second tag devices carried by the construction vehicles or maintenance vehicles issue alarm warnings to warn or remind the relevant personnel.

[0102] When non-target personnel (pedestrians or other individuals) or vehicles (passing vehicles or temporarily parked vehicles, etc.) are within the traffic cone area, an alarm command is transmitted from the back-end processing center, and the traffic cone's UWB base station issues an alarm warning, such as "Please slow down in the construction area" or "Parking is prohibited in the construction area." For example, the alarm warning may include audible and visual alerts for construction vehicles (or maintenance vehicles) and construction personnel (or maintenance personnel) that are not in or have left the traffic cone area.

[0103] Furthermore, the system also includes matching and verifying the following characteristics: whether the person clocks in and out for work in the morning or evening, whether they have a reason for sick leave or personal leave, whether the number of times they leave the premises exceeds the predetermined number, and whether they leave the traffic cone area outside of normal times or exceed the prescribed number of times. If any of the above situations apply, it will be determined that no alarm will be triggered.

[0104] In another embodiment, when construction workers and construction vehicles move within the traffic cone area, a visual display is made to determine whether they have exceeded the traffic cone area.

[0105] In another implementation, violation information is archived in a back-end processing center or related storage system. This facilitates further investigation and evidence collection should a staff member later be involved in an accident or other incident due to unauthorized absence.

[0106] It should be noted that the above is only an optional example and should not be construed as a limitation of the present invention.

[0107] Compared with existing technologies, this invention forms a traffic cone area by installing multiple traffic cones equipped with UWB base stations. The electronic fence area defined by the signals broadcast by the UWB base stations serves as the traffic cone area, improving signal transmission reliability and more accurately defining traffic cone areas used for construction or maintenance. By receiving personnel and vehicle location information from various tag devices through the UWB base stations, the feature information of personnel and / or construction vehicles can be determined in real time, enabling more accurate and immediate location determination. Matching and verification are performed based on the determined feature information of personnel and / or construction vehicles to determine whether they are within the traffic cone area. This allows for more effective and intelligent monitoring of the real-time dynamics and location information of personnel at construction or maintenance sites, effectively avoiding problems such as reduced positioning accuracy caused by factors such as antenna array position, signal transmission obstruction by buildings or other objects, and non-line-of-sight environments. By determining whether the determined personnel or vehicle location is within the traffic cone area, an alarm warning is issued, further ensuring the safety of personnel and maintenance vehicles at construction or maintenance sites.

[0108] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that various general-purpose devices can also implement the present invention. The above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A monitoring method based on electronic fences, characterized in that, The method is used for safety monitoring during road construction or maintenance. Multiple traffic cones are set up in the construction area or maintenance area, arranged in two rows at equal intervals. A traffic cone area is formed by multiple traffic cones equipped with UWB base stations. An electronic fence area is defined by the signal of broadcast information from UWB base stations that are spaced apart and form a triangle, which serves as the traffic cone area. Equip personnel and construction vehicles with labeling devices; The UWB base station receives personnel and vehicle location information sent by each tag device to determine the characteristic information of personnel and / or construction vehicles in real time. The tag information in the characteristic information of the identified personnel and / or construction vehicles is matched and verified with the preset tag information. When the identity verification information in the characteristic information of the identified personnel and / or construction vehicles is successfully matched with the preset identification information, if the UWB base station includes: a first UWB base station and a second UWB base station, the location information of all UWB base stations is obtained; the first time difference between sending location information to the first UWB base station and receiving location information at the first UWB base station is calculated; the second time difference between information transmission and reception between the first UWB base station and the second UWB base station is calculated. When both the first time difference and the second time difference are the shortest, the strongest waveform path in the waveform information of the first UWB base station and the second UWB base station is selected to determine the first distance and the second distance between the personnel and the first UWB base station and the second UWB base station. The location of the personnel and / or construction vehicles is calculated based on the calculated first distance and the second distance. Determine whether the location information of the identified personnel and / or construction vehicles is within the traffic cone area.

2. The monitoring method according to claim 1, characterized in that, A traffic cone area is formed by multiple traffic cones equipped with UWB base stations, and an electronic fence area is defined by the signals broadcast by the UWB base stations, specifically including: The electronic fence area is defined by the signals broadcast by UWB base stations that are spaced apart and arranged in a triangle. The information broadcast by the UWB base stations includes location information, identity verification information, fence feature information, and transmission power. The locatable area of ​​the electronic fence is defined by a circular area formed with each UWB base station as the center and a specified radius R.

3. The monitoring method according to claim 1, characterized in that, The distance between any two adjacent UWB base stations is 10m to 30m.

4. The monitoring method according to any one of claims 1 to 3, characterized in that, The step of receiving personnel and vehicle location information sent by each tag device through the UWB base station to determine the characteristic information of personnel and / or construction vehicles in real time includes: When the identity verification information in the characteristic information of the identified personnel and / or construction vehicles matches the preset identification information, the following steps are performed to determine the location information of the personnel and / or construction vehicles in real time: Obtain the location information of the UWB base station; The signal strength corresponding to each of the acquired location information is analyzed, and all location information is sorted according to the magnitude of the signal strength; Select a predetermined number of valid location information items from multiple location information items, prioritizing the most popular ones.

5. The monitoring method according to claim 4, characterized in that, The signal strength corresponding to each of the acquired location information is analyzed. Specifically, the strongest waveform path is selected from the waveform information of the signal transmission wave of the UWB base station in the traffic cone area to determine the location of people or vehicles. The strongest waveform path is the path with the least signal attenuation from the transmitter to the receiver. Selecting a predetermined number of valid location information items from multiple location information items, prioritizing them, further includes: determining the signal strength attenuation value corresponding to each of the selected predetermined number of valid location information items; and determining the location of the personnel and vehicles based on the selected predetermined number of valid location information items and their corresponding signal strength attenuation values.

6. The monitoring method according to claim 1 or 3, characterized in that, When the location of the identified personnel and / or construction vehicles exceeds the traffic cone area, the traffic cone issues an alarm warning, and the tag devices carried by the personnel and vehicles issue an alarm warning.

7. The monitoring method according to claim 1 or 3, characterized in that, When the location of the identified personnel and / or construction vehicles exceeds the traffic cone area, a site violation record report is generated and sent to the management server. The violation record report includes the location information and identification information of the personnel and vehicles, as well as the identification information of the electronic fence where the personnel and vehicles are located.

8. The monitoring method according to claim 1, characterized in that, The provision of tagging equipment for personnel and construction vehicles includes: Construction workers and vehicles are equipped with first and second tagging devices, respectively. The back-end processing center identifies each worker and vehicle, generating corresponding preset tagging information for matching with real-time monitored identity or vehicle tagging information. Each construction worker and construction vehicle is associated with the first tagging device and the second tagging device for matching and judgment in different situations.

9. The monitoring method according to claim 1 or 8, characterized in that, Also includes: When construction workers and vehicles move within the traffic cone area, a visual display is made to determine whether they have exceeded the traffic cone area.

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