Underground coal mine anti-impact personnel-limiting management system

Abstract

The invention relates to the technical field of underground management, and particularly discloses an underground coal mine anti-impact personnel-limiting management system, which is used for solving the problem that the underground coal mine personnel management is relatively weak in accident prevention capability. According to the invention, the positioning information of the personnel is obtained, the positioning base station installed at the entrance of the impact area is set as the first positioning base station, the positioning base station installed at the end point of the impact area is set as the second positioning base station, and the positioning base station installed at the exit of the impact area is set as the third positioning base station; a distance path between a first positioning base station and a second positioning base station is set as a first path, the direction of the first positioning base station facing the second positioning base station in the first path is used as a first-level forward direction, and the direction of the second positioning base station facing the first positioning base station in the first path is used as a first-level reverse direction. And comparing the positioning information of the adjacent time points to determine the movement direction of the personnel in the first path, thereby realizing dynamic monitoring and ensuring that the flow direction and state of the personnel are grasped in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of underground management, and more specifically, to an impact prevention and personnel limit management system for coal mines underground. Background Art

[0002] In coal mine safety management, due to uneven stress or stress concentration in the ore body, when the mining of the mine destroys the balance state of the rock mass, the accumulated stress may be suddenly released, forming a violent shock wave that impacts the surrounding rocks, support structures, and equipment. With the continuous progress of coal mine underground production technology and the gradual improvement of intelligent management level, the impact prevention and personnel limit management system for coal mines underground, as an important means to ensure underground safety production, has been applied in some coal mines. However, during the actual operation process, many deficiencies still emerge in the existing impact prevention and personnel limit management system for coal mines underground in terms of impact prevention and personnel limit, restricting its actual effect in ensuring personnel safety and preventing accidents. In the existing literature (Fan Chunbei. Design and research of a system for identifying illegal behaviors of personnel in impact dangerous areas in coal mines based on edge intelligence [D]. China University of Mining and Technology, 2023. DOI: 10.27623 / d.cnki.gzkyu.2023.002084), a system for identifying illegal behaviors of personnel in impact dangerous areas is designed, which can realize the identification of static and dynamic illegal behaviors of personnel in impact dangerous areas. Although it can achieve the preliminary positioning of personnel, due to the weak light and complex and changeable environment underground, it is difficult to reflect the dynamic distribution of personnel in real time and accurately. In this case, the overstaffed and understaffed states are difficult to be detected in a timely manner, thus reducing the system's prevention ability for impact accidents; and in terms of linkage control, the existing system's linkage management of each key passage underground is still relatively single. Most impact prevention and personnel limit management systems mainly rely on simple gate control and audible and visual alarms and other means to achieve personnel access control. However, in actual applications, when sudden situations occur underground or the system detects abnormal data, the activation of the linkage response mechanism is often not fast and sensitive enough. To solve the above problems, a technical solution is provided herein. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides an impact prevention and personnel limit management system for coal mines underground, which solves the problem of the weak prevention ability of impact prevention and personnel limit for impact accidents in coal mines underground by obtaining the personnel position and movement state in real time, so as to solve the problems raised in the above background art.

[0004] To achieve the above object, the present invention provides the following technical solutions: A coal mine underground anti-collision limited personnel management system, comprising a plurality of positioning base stations, a personnel identification management module and a linkage control module; the positioning base station is used to obtain the positioning information of personnel; the positioning information includes the number of personnel, the moving distance and the moving speed; the personnel identification management module is used to accurately locate the position of personnel and determine whether the number of personnel in the stamping area meets the limited number of personnel; the positioning base station installed at the entrance of the impact area is set as the first positioning base station, the positioning base station installed at the end of the impact area is set as the second positioning base station, and the positioning base station installed at the exit of the impact area is set as the third positioning base station, the distance path between the first positioning base station and the second positioning base station is set as the first path, and the distance path between the second positioning base station and the third positioning base station is set as the second path; the positioning information between adjacent time points in all positioning base stations in the first path is respectively obtained; the direction of the first positioning base station toward the second positioning base station in the first path is taken as the first-level positive direction, and the direction of the second positioning base station toward the first positioning base station in the first path is taken as the first-level reverse direction, and the positioning information of adjacent time points is compared to determine the movement direction of personnel in the first path; the linkage control module is used to control the entrance gate and the exit gate according to the output signal of the personnel identification management module.

[0005] As a further solution of the present invention, the positioning base station includes two infrared sensors, and the two infrared sensors form a cross detection area by setting a fixed angle on the same horizontal line to detect people.

[0006] It should be noted that the set fixed angle can be 160°, 140°, 120° and 100°, but if the fixed angle set for one positioning base station is 160°, the fixed angles of all other base stations must be set to 160°.

[0007] It should be noted that the number of people is determined as follows: for a single person, when passing through the intersection area, each infrared sensor will generate a typical peak in the signal; when two people pass side by side or slightly staggered, each infrared sensor will detect two separate peaks or multiple peaks within a peak; when two individuals pass through the detection area, each infrared sensor will collect infrared signal changes, and the overlapping area will generate a synthetic signal. By processing these signals, it can be determined whether it is one person or multiple people passing through the positioning base station at the same time. Specifically, through threshold analysis, if the two signals have different time differences and amplitude differences, it can be determined that there are two people. In addition, using peak detection and signal segmentation algorithms, combined with the output of the two sensors for correlation detection, the signal triggering order can be determined to help determine the number of people.

[0008] It should be noted that the number of people determined in the positioning information is only the number of people obtained from the same positioning base station, and its purpose is to solve the problem that it is difficult to detect people walking side by side.

[0009] As a further solution of the present invention, determining the movement direction of a person by comparing the positioning information at adjacent time points specifically includes: When the positioning base station at adjacent time points detects that the user is moving along the primary positive direction, it is recorded as "1", and at this time, it is determined that the person is moving towards the second positioning base station; When the positioning base station at adjacent time points detects that the user is moving along the primary negative direction, it is recorded as "0", and at this time, it is determined that the person is moving out towards the first positioning base station; When the positioning base station at adjacent time points detects multiple people simultaneously, the number of "1"s and "0"s is recorded according to the number of people at this time; For the situation where a person is first "1" and then "0" at adjacent time points, it is recorded as "0". At this time, the person first moves towards the second positioning base station and then turns back and moves out towards the first positioning base station; For the situation where a person is first "0" and then "1" at adjacent time points, it is recorded as "1". At this time, the person first moves out towards the first positioning base station and then turns back and moves towards the second positioning base station; Obtaining the number of "1"s and "0"s that appear within adjacent time points is the number of people in the first path.

[0010] As a further solution of the present invention, the personnel identification and management module is further configured to respectively obtain the positioning information between adjacent time points among all the positioning base stations in the second path; take the direction from the second positioning base station to the third positioning base station in the second path as the secondary positive direction, and the direction from the third positioning base station to the second positioning base station in the second path as the secondary negative direction, and compare the positioning information at adjacent time points to determine the movement direction of the people in the second path.

[0011] As a further solution of the present invention, determining the movement direction of the people in the second path by comparing the positioning information at adjacent time points specifically is: When the positioning base station at adjacent time points detects that the user is moving along the secondary positive direction, it is recorded as "0", and at this time, it is determined that the person is moving out towards the third positioning base station; When the positioning base station at adjacent time points detects that the user is moving along the secondary negative direction, it is recorded as "1", and at this time, it is determined that the person is moving towards the second positioning base station; When the positioning base station at adjacent time points detects multiple people simultaneously, the number of "1"s and "0"s is recorded according to the number of people at this time; For the situation where a person is first "1" and then "0" at adjacent time points, it is recorded as "0". At this time, the person first moves towards the second positioning base station and then turns back and moves out towards the third positioning base station; For the situation where a person is first "0" and then "1" at adjacent time points, it is recorded as "1". At this time, the person first moves out towards the third positioning base station and then turns back and moves towards the second positioning base station; Obtaining the number of "1"s and "0"s that appear within adjacent time points is the number of personnel in the second path.

[0012] As a further solution of the present invention, the personnel identification and management module further includes: when the first positioning base station monitors that the number of limited personnel is reached, an alarm will be triggered, and a signal to close the gate at the entrance of the impact area will be sent. Obtain the number of the first personnel monitored by the third positioning base station at this time. The number of limited personnel minus the number of the first personnel is the number of the second personnel in the impact area. Extract the sum of the number of personnel in the first path and the number of personnel in the second path as the number of the third personnel. Compare the number of the second personnel and the number of the third personnel. If the number of the second personnel is the same as the number of the third personnel, then the personnel in the stamping area at this time meet the limited personnel standard, and a signal to close the exit gate will be sent; if the number of the second personnel is different from the number of the third personnel, then the personnel in the stamping area at this time do not meet the limited personnel standard, and a signal to open the exit gate and a signal to open the entrance gate will be sent.

[0013] The technical effects and advantages of an anti-impulse and personnel-limiting management system for underground coal mines of the present invention: By obtaining the positioning information of personnel in the present invention, the positioning base station installed at the entrance of the impact area is set as the first positioning base station, the positioning base station installed at the end of the impact area is set as the second positioning base station, and the positioning base station installed at the exit of the impact area is set as the third positioning base station. The distance path between the first positioning base station and the second positioning base station is set as the first path. The direction from the first positioning base station to the second positioning base station in the first path is set as the first-level positive direction, and the direction from the second positioning base station to the first positioning base station in the first path is set as the first-level reverse direction, which helps to accurately judge whether the personnel are moving in the positive direction or the reverse direction, so as to more accurately identify abnormal or backward behaviors. Compare the positioning information at adjacent time points to determine the movement direction of personnel in the first path, realize dynamic monitoring, and ensure an immediate grasp of the personnel flow direction and status; The present invention helps to timely detect reverse or stagnant phenomena, early warning of potential risks, and improve the accident prevention ability. Brief Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the anti-impulse and personnel-limiting management system for underground coal mines provided by the present invention; Figure 2 It is a schematic diagram of personnel distribution and flow analysis provided by the present invention; Figure 3 It is a line chart of the 24-hour personnel flow trend provided by the present invention; Figure 4 It is a line chart of the number of people in the first path provided by the present invention; Figure 5 It is a line chart of the number of people in the second path provided by the present invention. Detailed Embodiments

[0015] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described technical solutions are only a part of the present invention, rather than all of it. All other technical solutions obtained by those of ordinary skill in the art based on the technical solutions of the present invention without creative efforts belong to the scope of protection of the present invention.

[0016] Embodiment 1 When the entrance of the impact area and the exit of the impact area are not at the same location: An impact prevention and personnel limit management system for underground coal mines includes a number of positioning base stations, a personnel identification management module, and a linkage control module; the number of positioning base stations is connected to the personnel identification management module, and the personnel identification management module is connected to the linkage control module; The positioning base station is used to obtain the positioning information of personnel; the positioning information includes the number of personnel, the moving distance, and the moving speed; The personnel identification management module is used to accurately locate the personnel position and determine whether the number of personnel in the stamping area meets the limited number of personnel; The linkage control module is used to control the entrance gate and the exit gate according to the output signal of the personnel identification management module.

[0017] The positioning base stations are installed at the entrance of the impact area, the end point of the impact area, and the exit of the impact area; positioning base stations are installed at equal intervals between the entrance of the impact area and the end point of the impact area, and between the end point of the impact area and the exit of the impact area; the positioning base station includes two infrared sensors, and the two infrared sensors form a cross-detection area by setting a fixed angle on the same horizontal line for personnel detection.

[0018] The positioning base station installed at the entrance of the impact area is set as the first positioning base station, the positioning base station installed at the end point of the impact area is set as the second positioning base station, and the positioning base station installed at the exit of the impact area is set as the third positioning base station. The distance path between the first positioning base station and the second positioning base station is set as the first path, and the distance path between the second positioning base station and the third positioning base station is set as the second path.

[0019] It should be noted that the set fixed angle can be 160°, 140°, 120°, and 100°. However, if the fixed angle set for one positioning base station is 160°, the fixed angles of all the other base stations need to be set to 160°.

[0020] It should be noted that the determination of the number of people: For a single person, when passing through the intersection area, each infrared sensor will generate a typical peak in the signal; while when two people pass side by side or slightly staggered, each infrared sensor will detect two separate peaks or multiple spikes within one peak; when two individuals pass through the detection area, each infrared sensor will collect the change of the infrared signal, and the overlapping area generates a composite signal. By processing these signals, it is possible to determine whether one person or multiple people pass through the positioning base station at the same time. Specifically, through threshold analysis, if there are differences in time difference and amplitude between two signals, it can be judged that there are two people. In addition, using peak detection and signal segmentation algorithms, combined with the correlation detection of the outputs of two sensors to judge the signal trigger order, can help determine the number of people.

[0021] It should be noted that the number of people determined in the positioning information is only the number of people obtained from the same positioning base station, and its purpose is to solve the problem that it is difficult to detect people walking side by side.

[0022] Obtain the positioning information between adjacent time points in all positioning base stations in the first path respectively; take the direction from the first positioning base station to the second positioning base station in the first path as the first-level positive direction, and the direction from the second positioning base station to the first positioning base station in the first path as the first-level reverse direction, and compare the positioning information at adjacent time points to determine the movement direction of the people in the first path.

[0023] When the positioning base station at adjacent time points detects that the user is moving along the first-level positive direction, record it as "1", and at this time, it is determined that the direction of the person is towards the second positioning base station.

[0024] When the positioning base station at adjacent time points detects that the user is moving along the first-level reverse direction, record it as "0", and at this time, it is determined that the direction of the person is towards the first positioning base station.

[0025] When the positioning base station at adjacent time points detects multiple people at the same time, record the number of "1" or "0" according to the number of people at this time.

[0026] For the situation where the person is "1" first and then "0" at adjacent time points, record it as "0", and at this time, the person first enters towards the second positioning base station and then turns back and exits towards the first positioning base station.

[0027] For the situation where the person is "0" first and then "1" at adjacent time points, record it as "1", and at this time, the person first exits towards the first positioning base station and then turns back and enters towards the second positioning base station.

[0028] Obtain the number of "1" and "0" that appear within adjacent time points, which is the number of people in the first path.

[0029] Obtain the positioning information between adjacent time points for all positioning base stations in the second path respectively; Take the direction from the second positioning base station to the third positioning base station in the second path as the secondary positive direction, and the direction from the third positioning base station to the second positioning base station in the second path as the secondary negative direction, and compare the positioning information at adjacent time points to determine the movement direction of the person in the second path.

[0030] When the positioning base station at adjacent time points detects that the user is moving along the secondary positive direction, record it as "0", and at this time, it is determined that the person is moving out in the direction of the third positioning base station.

[0031] When the positioning base station at adjacent time points detects that the user is moving along the secondary negative direction, record it as "1", and at this time, it is determined that the person is moving in in the direction of the second positioning base station.

[0032] When the positioning base station at adjacent time points detects multiple persons at the same time, record the number of "1"s or "0"s according to the number of persons at this time.

[0033] For the situation where the person is "1" first and then "0" at adjacent time points, record it as "0". At this time, the person first moves in in the direction of the second positioning base station and then turns back and moves out in the direction of the third positioning base station.

[0034] For the situation where the person is "0" first and then "1" at adjacent time points, record it as "1". At this time, the person first moves out in the direction of the third positioning base station and then turns back and moves in in the direction of the second positioning base station.

[0035] Obtain the number of "1"s and "0"s that appear within adjacent time points, which is the number of persons in the second path.

[0036] When the first positioning base station monitors that the limited number of persons is reached, an alarm will be triggered, and a signal to close the entrance gate of the impact area will be sent. Obtain the number of the first persons monitored by the third positioning base station at this time. Subtract the number of the first persons from the limited number of persons to get the number of the second persons in the impact area. Extract the sum of the number of persons in the first path and the number of persons in the second path as the number of the third persons. Compare the number of the second persons and the number of the third persons. If the number of the second persons is the same as the number of the third persons, then the persons in the stamping area meet the limited number of persons standard, and a signal to close the exit gate will be sent; if the number of the second persons is different from the number of the third persons, then the persons in the stamping area do not meet the limited number of persons standard, and a signal to open the exit gate and a signal to open the entrance gate will be sent.

[0037] Figure 1 This is a schematic diagram of the anti-impact and limited-personnel management system for use in coal mines provided by the present invention, which shows the basic structure and working principle of the anti-impact and limited-personnel management system for use in coal mines. Personnel positioning and monitoring are carried out through three key nodes: the entrance base station, the end base station, and the exit base station to ensure safety management in the impact area.

[0038] Figure 2 This is a schematic diagram of personnel distribution and traffic analysis provided by the present invention, which shows the visual data of personnel distribution, traffic monitoring and dynamic trend analysis of the anti-bumping personnel limit management system for underground coal mines. The purpose is to track the personnel flow in each area of the underground bumping area in real time to ensure the high efficiency of safety production management.

[0039] Figure 3 This is a line chart of the 24-hour personnel flow trend provided by the present invention, which reflects the personnel flow in the underground bumping area of the coal mine in the past 24 hours. It shows respectively: the number of people entering (blue curve), the number of people leaving (green curve). At 18:00, the number of people entering is 7, and the number of people leaving is 6, indicating that the number of people in the bumping area is still increasing during this period. The traffic flow fluctuates greatly during the period from 09:00 to 18:00, and the number of people entering and leaving is basically the same.

[0040] Figure 4 This is a line chart of the traffic flow of the first path provided by the present invention, which reflects the change of the traffic flow on the first path (from the entrance base station to the end base station). The vertical axis is the real-time number of personnel, and the horizontal axis is time (14:00 - 14:30). At 14:25, the traffic flow on the first path is 4 people. The traffic flow fluctuates during this period, with the peak approaching 6 people and the lowest being only 2 people, which helps to analyze whether the number of people entering the bumping area meets the personnel limit standard and prevent over-limit situations.

[0041] Figure 5 This is a line chart of the traffic flow of the second path provided by the present invention, which shows the change of the traffic flow on the second path (from the end base station to the exit base station). The vertical axis is the real-time number of personnel, and the horizontal axis is time (14:00 - 14:30). At 14:25, the traffic flow on the second path is 2 people, which is lower than the 4 people on the first path, indicating that some people are still staying in the bumping area, which helps to evaluate the personnel evacuation efficiency in the bumping area and detect whether there are any detained personnel.

[0042] Example 2 The personnel limit standard for the bumping area in a certain underground coal mine is that at most 5 people are allowed to be present in the bumping area at the same time. The system installs three positioning base stations at the entrance, end and exit of the bumping area respectively. Among them: the first positioning base station (entrance): used to detect the personnel entering the bumping area; the second positioning base station (end): located in the middle of the bumping area, used to record the positioning information of personnel when passing through the middle section; the third positioning base station (exit): used to detect the personnel leaving the bumping area.

[0043] Inside each positioning base station, two infrared sensors are used. A fixed included angle (optional 160°, 140°, 120° or 100°, but if one of them is 160°, then all are selected as 160°) is set on the same horizontal line to form an intersection detection area, so as to ensure that each independent heat source can still be accurately distinguished when people walk side by side, and then determine the number of people passing through.

[0044] When the cumulative number of people detected by the first positioning base station entering the impact area reaches the preset entry limit (for example, when 5 independent "entry signals" appear continuously at the entrance), the system triggers an alarm and sends a signal to the linkage control module to close the entrance gate of the impact area to prevent more people from entering.

[0045] In the first path (from the entrance to the end), assume that the following positioning data are collected at adjacent time points during a certain period: Time point A: 3 "1" signals are detected (indicating that 3 people are moving towards the end); Time point B: 1 "0" signal is detected (indicating that 1 person turns back to the entrance direction); Comprehensive statistics: The number of people in the first path = 3 - 1 = 2 people (net entry); For the statistical method of "1" and "0" here, if "1" is followed by "0", it is recorded as a net "entry"; if "0" is followed by "1", it is recorded as a net "exit". The data for each time period are accumulated and subtracted according to the algorithm to obtain the actual number of people entering the first path.

[0046] In the second path (from the end to the exit), the data collected may be: Time point C: 4 "0" signals are detected (indicating that 4 people are moving towards the exit); Time point D: 1 "1" signal is detected (indicating that 1 person turns back to the second positioning base station); Comprehensive statistics: The net outflow of people in the second path = 4 - 1 = 3 people.

[0047] Initial number of internal people: When the entrance is closed, the number of people already inside can be calculated as follows. The first number of people: that is, the number of people detected by the first positioning base station at the entrance when the entrance is closed (for example, 5 people are detected).

[0048] Adding the net entry amount (for example, 2 people) statistically obtained from the first path to the net outflow amount (for example, 3 people) statistically obtained from the second path, the third number of people (i.e., an estimated value of the number of people in the impact area) is obtained.

[0049] The system compares the number of people obtained at the entrance with the data statistically obtained from the two paths: If the number of people flowing out in the second path matches the data of the people entering in the first path (for example, both indicate that there are 5 people inside), the system determines that the number of people in the impact area meets the personnel limit standard, and the linkage control module then sends a signal to close the exit gate to prevent the situation of excessive people inside.

[0050] If the data does not match (for example, the entrance detection shows 5 people, but the total of the two paths only shows 4 people or 6 people), it is determined that the number of people inside does not meet the standard. The system sends a signal to open the exit gate and at the same time reopens the entrance gate for personnel evacuation or supplementary entry to ensure that the final number of people inside is controlled within a safe range.

[0051] By setting three positioning base stations and two detection paths, integrating the data at the entrance, end point, and exit, and using the signal peak analysis and direction determination algorithm of infrared sensors, precise monitoring of the number and movement direction of people in the underground impact area is achieved. According to the detection information, the system can automatically judge whether the number of people inside exceeds the limit, and timely open and close the entrance and exit gates through the linkage control module, thereby effectively preventing accidents caused by excessive personnel and improving the underground safety management level.

[0052] Embodiment 3 When the entrance to the impact area and the exit of the impact area are at the same location: Install the positioning base stations at the entrance to the impact area and the end point of the impact area, and install the positioning base stations at equal intervals between the impact distance between the entrance to the impact area and the end point of the impact area; set the positioning base station installed at the entrance to the impact area as the first positioning base station, and the positioning base station installed at the end point of the impact area as the second positioning base station, and set the distance path between the first positioning base station and the second positioning base station as the first path; Respectively obtain the positioning information between adjacent time points among all the positioning base stations in the first path; take the direction from the first positioning base station to the second positioning base station in the first path as the first-level positive direction, and the direction from the second positioning base station to the first positioning base station in the first path as the first-level reverse direction, and compare the positioning information at adjacent time points to determine the movement direction of people in the first path; When the positioning base station at adjacent time points detects that the user is along the first-level positive direction, record it as "1", and at this time, it is determined that the direction of the person is towards the second positioning base station; When the positioning base station at adjacent time points detects that the user is along the first-level reverse direction, record it as "0", and at this time, it is determined that the direction of the person is towards the first positioning base station; When the positioning base station at adjacent time points detects multiple people at the same time, at this time, record the number of "1" or "0" according to the number of people; For the case where a person is "1" first and then "0" at adjacent time points, it is recorded as "0". At this time, the person first moves towards the second positioning base station and then turns back and moves out towards the first positioning base station. For the case where a person is "0" first and then "1" at adjacent time points, it is recorded as "1". At this time, the person first moves out towards the first positioning base station and then turns back and moves in towards the second positioning base station. Obtaining the number of "1"s and "0"s that appear within adjacent time points is the number of people in the first path.

[0053] When the first positioning base station detects that the number of restricted people has entered, it will trigger an alarm and send a signal to close the entrance gate of the impact area, extract the number of people in the first path, compare the number of people in the first path with the number of restricted people. If the number of people in the first path is the same as the number of restricted people, then the people in the stamping area meet the standard of the limited number of people, and a signal to close the exit gate is sent; if the number of people in the first path is different from the number of restricted people, then the people in the stamping area do not meet the standard of the limited number of people, and a signal to open the exit gate and a signal to open the entrance gate are sent.

[0054] Embodiment 4 In a certain coal mine underground, the entrance and exit of the impact area are both located at the same place. To ensure that the number of people in this area is strictly controlled within the safety standard (for example, the maximum number of people allowed to enter is 4), the system installs several positioning base stations between the entrance of the impact area and the end of the impact area. Each positioning base station uses two infrared sensors. By setting a fixed angle (such as 160°, 140°, 120° or 100° can be selected, but if one positioning base station uses 160°, then all are set to 160°) at the same horizontal line, a cross-detection area is formed, so as to accurately judge the thermal signal when a person passes through.

[0055] The positioning base stations between the entrance and the end of the impact area form a path. The direction from the first positioning base station (entrance) to the second positioning base station (end) is set as the "primary positive direction" and recorded as "1", indicating that a person is entering the impact area in the positive direction; the direction from the second positioning base station to the first positioning base station is set as the "primary negative direction" and recorded as "0", indicating that a person is leaving the impact area in the positive direction.

[0056] Each positioning base station uses two infrared sensors to collect infrared signals in the cross-detection area.

[0057] When a single person passes through, both sensors will generate a typical peak; when two people walk side by side or are slightly misaligned, the sensor will detect two separate peaks or multiple spikes within a single peak. Through threshold judgment, peak detection and signal segmentation algorithms, the number of people passing through simultaneously can be judged.

[0058] When among the detection data at adjacent time points, if the user signal changes from "1" (towards the end point) to "0" (towards the entrance), it indicates that the person entered first and then turned back, and it is recorded as "0".

[0059] Conversely, if it was first "0" and then changed to "1", it is recorded as "1", indicating that the person left first and then re-entered.

[0060] Count the number of all "1"s and "0"s that appear within adjacent time points, and finally obtain the actual number of people in the first path.

[0061] Suppose the limited number of people set for a certain period is 4. When the first positioning base station detects that the cumulative number of people entering reaches 4, the system triggers an alarm and sends a signal to the linkage control module to close the entrance gate of the impact area to prevent more people from entering, while continuously monitoring the detection data of each positioning base station on the first path.

[0062] The first positioning base station (entrance) continuously detects the entering signal. Through the signal processing algorithm, 4 entering signals are statistically obtained. At adjacent time points, the signals of some people are "1", indicating movement towards the inside of the impact area (towards the end point). For example, in a certain time period, the first positioning base station shows that there are a total of 4 consecutive "1" signals, but among them, 1 changes from "1" to "0", indicating that the person turned back and left.

[0063] Suppose after cumulative statistics, the number of "1"s is 4 and the number of "0"s is 0, then the actual number of people entering the impact area is 4, meeting the limited number standard. If the number of "1"s is 4 and the number of "0"s is 1, then the net number of people entering is 3, not meeting the expectation. At this time, the system will judge that the number of people in the impact area is insufficient and send a signal to open the entrance and exit gates to facilitate personnel adjustment or evacuation.

[0064] Once the first positioning base station detects an entering signal reaching 4 people, the system immediately issues an alarm and closes the entrance gate to prevent more people from entering. Compare the cumulative number of people on the first path with the limited number of people: If the statistical number is the same as the limited number of people (4 people), it means that the internal personnel meet the requirements, and the system automatically sends a signal to close the exit gate to prevent the internal personnel from leaking or causing secondary aggregation due to the chaotic flow of people; If the statistical number does not match the limited number of people (for example, the actual number is less than or greater than 4 people), the system will send a signal to open the exit gate and reopen the entrance gate to prompt the on-site management personnel to adjust the flow of people to ensure that the internal number returns to the safe range.

[0065] In an embodiment of the present invention, by obtaining the positioning information of a person, a positioning base station installed at the entrance of the impact area is set as the first positioning base station, a positioning base station installed at the end of the impact area is set as the second positioning base station, and a positioning base station installed at the exit of the impact area is set as the third positioning base station. The distance path between the first positioning base station and the second positioning base station is set as the first path. The direction from the first positioning base station to the second positioning base station in the first path is set as the first-level positive direction, and the direction from the second positioning base station to the first positioning base station in the first path is set as the first-level reverse direction, which helps to accurately judge whether the person is moving in the positive direction or the reverse direction, so as to more accurately identify abnormal or backward behaviors. By comparing the positioning information at adjacent time points to determine the movement direction of the person in the first path, dynamic monitoring is realized, ensuring an immediate grasp of the personnel flow direction and status; the present invention helps to timely detect reverse or staying phenomena, early warning of potential risks, and improve the accident prevention ability.

[0066] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

[0067] Finally: The above is only the preferred solution of the present invention and is not used to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A coal mine underground anti-collision limited personnel management system, including several positioning base stations, personnel identification management modules and linkage control modules; characterized in that: The positioning base station is used to obtain the positioning information of personnel; the positioning information includes the number of personnel, moving distance and moving speed; The personnel identification management module is used to accurately locate the position of personnel and determine whether the number of personnel in the stamping area meets the limit number of personnel; set the positioning base station installed at the entrance of the impact area as the first positioning base station, the positioning base station installed at the end of the impact area as the second positioning base station, and the positioning base station installed at the exit of the impact area as the third positioning base station, set the distance path between the first positioning base station and the second positioning base station as the first path, and set the distance path between the second positioning base station and the third positioning base station as the second path; respectively obtain the positioning information between adjacent time points in all positioning base stations in the first path; take the direction of the first positioning base station toward the second positioning base station in the first path as the first-level positive direction, and the direction of the second positioning base station toward the first positioning base station in the first path as the first-level reverse direction, and compare the positioning information of adjacent time points to determine the movement direction of personnel in the first path; The linkage control module is used to control the entrance gate and the exit gate according to the output signal of the personnel identification management module.

2. The anti-collision and limited personnel management system for underground coal mines according to claim 1, characterized in that: The positioning base station includes two infrared sensors, which form a cross detection area for personnel detection by setting a fixed angle on the same horizontal line.

3. The anti-collision and limited personnel management system for underground coal mines according to claim 1, characterized in that: The step of comparing the positioning information of adjacent time points to determine the movement direction of the person in the first path specifically includes: When the positioning base station at the adjacent time point detects that the user is moving in the first-level positive direction, it is recorded as "1". At this time, the direction of the person is determined to be towards the second positioning base station; When the positioning base station at the adjacent time point detects that the user is going in the first-level reverse direction, it is recorded as "0". At this time, the direction of the person is determined to be towards the first positioning base station; When the positioning base stations at adjacent time points detect multiple people at the same time, the number of "1" or "0" is recorded according to the number of people; If the personnel is first "1" and then "0" at adjacent time points, it is recorded as "0". At this time, the personnel first enters the direction of the second positioning base station, and then turns back and exits in the direction of the first positioning base station; If the personnel is first "0" and then "1" at adjacent time points, it is recorded as "1". At this time, the personnel first goes out in the direction of the first positioning base station, and then turns back and goes in the direction of the second positioning base station; The number of "1" and "0" that appear in adjacent time points is the number of people in the first path.

4. The anti-collision and limited personnel management system for underground coal mines according to claim 1, characterized in that: The personnel identification management module is also used to respectively obtain the positioning information between adjacent time points in all positioning base stations in the second path; take the direction of the second positioning base station toward the third positioning base station in the second path as the secondary positive direction, and the direction of the third positioning base station toward the second positioning base station in the second path as the secondary reverse direction, and compare the positioning information of adjacent time points to determine the direction of movement of personnel in the second path.

5. The anti-collision and limited personnel management system for underground coal mines according to claim 4, characterized in that: The method of comparing the positioning information of adjacent time points to determine the movement direction of the person in the second path is specifically: When the positioning base station at the adjacent time point detects that the user is along the secondary positive direction, it is recorded as "0". At this time, the direction of the person is determined to be towards the third positioning base station; When the positioning base station at the adjacent time point detects that the user is moving in the secondary reverse direction, it is recorded as "1". At this time, the direction of the person is determined to be towards the second positioning base station; When the positioning base stations at adjacent time points detect multiple people at the same time, the number of "1" or "0" is recorded according to the number of people; If the personnel is first "1" and then "0" at adjacent time points, it is recorded as "0". At this time, the personnel first enters the direction of the second positioning base station, and then turns back and exits in the direction of the third positioning base station; If the personnel is first "0" and then "1" at adjacent time points, it is recorded as "1". At this time, the personnel first goes out in the direction of the third positioning base station, and then turns back and goes in the direction of the second positioning base station; The number of "1" and "0" that appear in adjacent time points is the number of people in the second path.

6. The anti-collision and limited personnel management system for underground coal mines according to claim 1, characterized in that: The personnel identification management module also includes: when the first positioning base station monitors the number of people entering the limited number, it will trigger an early warning and send out a signal to close the entrance gate of the impact zone, obtain the first number of people monitored by the third positioning base station at this time, subtract the first number of people from the limited number of people to get the second number of people in the impact zone, extract the sum of the number of people in the first path and the number of people in the second path as the third number of people, compare the second number of people and the third number of people, if the second number of people is the same as the third number of people, then the number of people in the stamping area at this time meets the standard for the limited number of people, and send out a signal to close the exit gate; if the second number of people is different from the third number of people, then the number of people in the stamping area at this time does not meet the standard for the limited number of people, and send out a signal to open the exit gate and a signal to open the entrance gate.

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