A real-time monitoring system for stations based on wireless sensor networks

Abstract

The present invention discloses a station real-time monitoring system based on a wireless sensor network, which belongs to the field of wireless sensor monitoring technology. It includes a data acquisition module and a data processing module; the data acquisition module uses a wireless sensor network to perform real-time data acquisition on the passenger position of a subway station, and the data processing module is used to process and calculate the passenger position data collected by the data acquisition module and the wireless sensor coordinate value positioning data in the wireless sensor network; the present invention can monitor the number of passengers getting on and off the subway through the installation position of the distance sensor group, and at the same time, it can also monitor the number of passengers changing carriages, so that the number of people in each subway carriage can be monitored more accurately, and the number of people in each carriage can be displayed before the subway arrives at the station, so that passengers can choose a carriage with fewer people to ride, realizing the freedom of passengers.

Description

Technical Field

[0001] The invention relates to the technical field of wireless sensor monitoring, in particular to a station real-time monitoring system based on a wireless sensor network. Background Art

[0002] With the continuous development of society and the continuous advancement of science and technology, the scale of rail transit development in my country is also gradually expanding. Rail transit includes public transportation such as high-speed rail, trains, and subways. Under the condition that urban roads are crowded and affect normal traffic order and efficiency, the development of subway rail transit has greatly improved the problem of road congestion. However, with the continuous development of subways, people also have various problems in the process of taking subways:

[0003] The distribution of passengers in each subway car is uneven, which leads to some subway cars being crowded and some cars being empty, which wastes public resources and affects the passengers' travel experience. How to reasonably disperse and guide the number of passengers in each subway car has become an urgent problem to be solved.

[0004] Chinese invention patent CN108944976A discloses a diversion device for selecting a carriage when riding a subway, and specifically discloses the following technical solution, which uses the infrared reflection principle to judge the crowdedness in the carriage, so as to determine the number of people in the subway carriage. However, when the infrared reflection device is blocked or partially blocked, it will lead to misjudgment. In addition, the patent is not accurate enough in judging the number of people in the carriage, which affects the accuracy of judging the number of people in the subway carriage;

[0005] Therefore, people are in urgent need of a station real-time monitoring system based on wireless sensor networks to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a station real-time monitoring system based on a wireless sensor network to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a station real-time monitoring system based on a wireless sensor network, the station real-time monitoring system includes a data acquisition module, a model positioning module, a data processing module and a determination display module;

[0008] The data acquisition module uses the wireless sensor network to perform real-time data acquisition on the passenger positions of the subway station. The model positioning module is used to perform coordinate value positioning of the wireless sensors in the wireless sensor network in a two-dimensional model. The data processing module is used to process and calculate the passenger position data collected by the data acquisition module and the coordinate value positioning data of the wireless sensors in the wireless sensor network. The determination and display module is used to verify and display the results processed and calculated by the data processing module.

[0009] The output ends of the data acquisition module and the model positioning module are electrically connected to the input end of the data processing module, and the output end of the data processing module is electrically connected to the input end of the determination and display module.

[0010] According to the above technical solution, the data acquisition module includes a distance sensor group and a pressure sensor group;

[0011] The wireless sensor network is composed of a distance sensor group and a pressure sensor group, and the output ends of the distance sensor group and the pressure sensor group are electrically connected to the input end of the data processing module;

[0012] The distance sensor group is installed at the connection of subway cars and at the doors of subway cars to detect whether there are passengers getting on or off the train and whether there are passengers changing cars to take the subway, so as to determine the number of passengers in the car and the degree of crowding in the car. The pressure sensor group is installed under the seats of the subway car to detect whether there are passengers sitting on the seats, so as to determine the number of empty seats in the car.

[0013] The model positioning module includes a plane model building unit, a coordinate system building unit, a coordinate value positioning unit and a label assigning unit;

[0014] The plane model building unit outputs a plane two-dimensional model, the output end of the coordinate system building unit is connected to the plane two-dimensional model, the output end of the coordinate value positioning unit is connected to the distance sensor group, the output end of the label assigning unit is connected to the input end of the distance sensor group and the pressure sensor group, and the distance sensor group is positioned in the plane two-dimensional model;

[0015] The plane model building unit is used to build a two-dimensional plane model of the plane where the distance sensor group is located, so as to uniformly manage the distance sensor group in the wireless sensor network; the coordinate system building unit is used to build a rectangular coordinate system of the plane where the two-dimensional plane model is located, so as to locate the position of each distance sensor in the distance sensor group; the coordinate value positioning unit is used to assign a coordinate value to each distance sensor in the rectangular coordinate system, and determine the walking direction of the passengers by locating the coordinate value of each distance sensor in the distance sensor group; the label assigning unit is used to assign label information to each distance sensor and pressure sensor in the wireless sensor network, so as to determine the detected position according to the label information of the distance sensor and the pressure sensor, so as to determine the number of passengers in the subway car and the number of empty seats in the car.

[0016] According to the above technical solution, the distance sensor group is divided into a first distance sensor group, a second distance sensor group, a third distance sensor group and a fourth distance sensor group;

[0017] The first distance sensor group is installed on both sides of the subway car connection, the second distance sensor group is installed on the top of the subway car connection, the third distance sensor group is installed on both sides of the subway car door, and the fourth distance sensor group is installed on the top of the subway car door;

[0018] The data acquisition module also includes a time recording unit, the output end of the time recording unit is electrically connected to the input end of the data processing module;

[0019] The time recording unit is used to start timing when the distance sensor group detects a distance change, and the timing time is represented by T, and stop timing when the same distance sensor detects that the distance changes again;

[0020] When T≥t, it indicates that the distance sensor is blocked, where t represents a set time threshold.

[0021] By using the first distance sensor group and the third distance sensor group, the number of passengers getting on and off the carriage and the number of passengers changing carriages can be detected when there are fewer passengers in the carriage. By using the second distance sensor group and the fourth distance sensor group, the number of passengers getting on and off the carriage and the number of passengers changing carriages can be detected when there are more passengers in the carriage. Because when there are more passengers in the carriage, the first distance sensor group and the third distance sensor group may be blocked, resulting in affecting the detection of the number of passengers in the carriage. By installing the second distance sensor group and the fourth distance sensor group at the top, even if the first distance sensor group and the third distance sensor group are blocked by passengers, it will not affect the detection of the number of passengers getting on and off the carriage and the number of passengers changing carriages. When the data detected by the first distance sensor group, the second distance sensor group, the third distance sensor group and the fourth distance sensor group do not change within time t, it indicates that there are more people in the carriage and the distance sensor groups are all blocked.

[0022] According to the above technical solution, the data processing module includes a central control unit and a data analysis unit;

[0023] The central control system is used to intelligently control the entire system, and the data analysis unit is used to determine the movement of passengers based on the detection data of the distance sensor, the label assigned by the label assigning unit, and the positioning data of the coordinate value positioning unit, so as to judge the number of people in the subway car;

[0024] The output end of the data analysis unit is electrically connected to the input end of the central control unit.

[0025] According to the above technical solution, the data collection module also includes a unit for counting the number of people entering and leaving the station;

[0026] The station entry and exit counting unit counts the number of people entering and leaving the station through the station entry and exit gates, compares it with the number of people counted in the carriage, and determines whether the monitored number of people falls within the floating range;

[0027] The determination display module includes a number verification unit and a display screen;

[0028] The number verification unit is used to verify the analysis result of the data analysis unit according to the number of people entering and leaving the station counted by the number of people entering and leaving the station counting unit and the total number of people in the current carriage, so as to further determine and verify the number of people in the current carriage; the display screen is installed in the middle of each carriage at the subway stop position on the subway platform, and is used to display the current number of people and the number of empty seats in each carriage of the subway before the subway arrives at the station, so that passengers can choose a carriage with fewer people to take, thereby realizing the diversion of passengers;

[0029] The output end of the station entry and exit counting unit is electrically connected to the input end of the number verification unit, the output end of the number verification unit is electrically connected to the input end of the central control unit, and the output end of the central control unit is electrically connected to the input end of the display screen.

[0030] The number of passengers in each subway car is displayed on a display screen, so that passengers can know the crowdedness of each car in advance and choose a subway car with fewer passengers to ride. This can effectively divert subway passengers, avoid crowded subway cars, and provide passengers with a better riding environment.

[0031] According to the above technical solution, the first distance sensor group and the third distance sensor group establish a first plane two-dimensional model, the second distance sensor group and the fourth distance sensor group establish a second plane two-dimensional model, the coordinate system establishment unit establishes a first plane rectangular coordinate system for the first plane two-dimensional model, the coordinate system establishment unit establishes a second plane rectangular coordinate system for the second plane two-dimensional model, and the coordinate value positioning unit assigns the distance sensor in the first plane rectangular coordinate system with a coordinate value (X i , Y i ), the coordinate value positioning unit assigns the distance sensor in the second plane rectangular coordinate system a coordinate value (M i , N i ), the label assigning unit assigns the subway car location information of each sensor in the first distance sensor group, the second distance sensor group, the third distance sensor group and the fourth distance sensor group, so as to determine the corresponding car number information detected by each distance sensor.

[0032] According to the above technical solution, the initial detection distance of each distance sensor group in the distance sensor group is L, and the first distance sensor group and the second distance sensor group are divided into three rows and arranged in a matrix, so that the passenger's travel trajectory can be confirmed to determine whether the passenger has changed the car to ride, so that the change in the number of passengers inside the car can be accurately understood. The distance sensors with coordinates (X0, Y0), (X1, Y0) and (X2, Y0) in the first distance sensor group labeled as the connection between the i-th car and the i+1-th car detect distance changes within the intervals T=T1≤ts and T=T2≤ts, and the data analysis The unit retrieves the tags of the distance sensor locations with coordinates (X0, Y0), (X1, Y0) and (X2, Y0). The data analysis unit calculates (X1, Y0)-(X0, Y0)=(1,0), (X2, Y0)-(X1, Y0)=(1,0) according to the coordinate values ​​(X0, Y0)=(0,0), (X1, Y0)=(1,0) and (X2, Y0)=(2,0), indicating that the passenger is going from the i-th car to the i+1-th car to take the subway. The central control unit controls the display screen corresponding to the i-th car to display a decrease in the number of passengers, and the display screen corresponding to the i+1-th car to display an increase in the number of passengers.

[0033] According to the above technical solution, the coordinate value in the first distance sensor group is (X i , Y i ) detects a distance change, and the time recorded by the time recording unit is T=T3≥ts, indicating that the coordinate value is (X i , Y i ) is blocked, the second distance sensor group uploads the detection data. Because some distance sensors in the first distance sensor group are blocked at this time, the first distance sensor group will not be able to detect whether the passenger changes cars to ride. At this time, the second distance sensor group installed at the top of the car connection uploads the detection distance, which can effectively improve the accuracy of passenger monitoring and make the monitoring of the number of passengers in each car more accurate.

[0034] According to the above technical solution, the third distance sensor group and the fourth distance sensor group are divided into three rows and arranged in a matrix, so that the passenger's travel trajectory can be confirmed, so as to determine whether the passenger has changed the car to ride, so that the change in the number of passengers inside the car can be accurately understood. The distance sensors with coordinates (M0, N0), (M0, N1) and (M0, N2) in the third distance sensor group labeled on both sides of the door of the i-th car detect distance changes within the interval T = T4 ≤ ts and T5 ≤ ts, and the data analysis unit retrieves the coordinates The data analysis unit calculates (M0, N1)-(M0, N0)=(0,1), (M0, N2)-(M0, N1)=(0,1) according to the coordinate values ​​(M0, N0)=(0,0), (M0, N1)=(1,0) and (M0, N2)=(0,2), indicating that the passenger has entered the i-th carriage through the door of the i-th carriage, and the central control unit controls the display screen corresponding to the i-th carriage to increase the number of passengers by one;

[0035] The coordinate value in the third distance sensor group is (M i , N i ) detects a distance change, and the time recorded by the time recording unit is T=T6≥ts, indicating that the coordinate value is (M i , N i ) is blocked, the fourth distance sensor group uploads the detection data. Because some distance sensors in the third distance sensor group are blocked at this time, the third distance sensor group will not be able to detect whether the passenger changes cars to ride. At this time, the fourth distance sensor group installed on the top of the car door uploads the detection distance, which can effectively improve the accuracy of passenger monitoring and make the monitoring of the number of passengers in each car more accurate.

[0036] According to the above technical solution, the pressure value detected by the pressure sensor group is P, and the pressure value of each seat in the subway car is calculated according to the following formula:

[0037] p=P / i

[0038] Where p represents the average pressure on each seat, i represents the number of seats; when p ≥ f, it means there are no empty seats;

[0039] When p<f, it indicates that there is an empty seat, and f indicates a set pressure threshold; the display screen displays whether there is an empty seat.

[0040] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0041] 1. The present invention can monitor the number of passengers getting on and off the subway through the installation position of the distance sensor group. At the same time, it can also monitor the number of passengers changing cars, so that the number of people in each subway car can be monitored more accurately. The number of people in each car can be displayed before the subway arrives at the station, so that passengers can choose a car with fewer people to ride. While achieving the freedom of passengers to ride, it also realizes the diversion of subway passengers and avoids congestion. At the same time, the pressure sensor group can be used to display whether there are vacancies in the car, thereby avoiding the waste of public resources to the greatest extent. In addition, compared with traditional subway diversion, the monitoring of the number of passengers in each car is more accurate.

[0042] 2. The present invention uses a model positioning unit to locate and label each distance sensor and pressure sensor, so that the number of people getting on and off each subway car can be accurately understood, so that the exact number of people in each subway car can be more clearly understood.

[0043] 3. Through the matrix arrangement of the distance sensor group, the direction of passengers' travel can be understood based on the detection data of different distance sensors, avoiding misjudgment that leads to inaccurate monitoring of the number of people in the subway car. At the same time, the degree of congestion in the car can be preliminarily determined based on the obstruction of the distance sensor.

[0044] 4. The present invention verifies the number of passengers inside the subway station through the entrance and exit population counting unit and the population verification unit, so as to more accurately monitor the number of people inside the subway car, realize the update of the number of passengers in the subway car, avoid the error of population monitoring from gradually increasing, and further improve the accuracy of monitoring the number of passengers in the subway car. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0046] Figure 1 It is a schematic diagram of the module composition of a station real-time monitoring system based on a wireless sensor network of the present invention;

[0047] Figure 2 It is a module connection diagram of a station real-time monitoring system based on a wireless sensor network of the present invention;

[0048] Figure 3 It is a subway car connection schematic diagram of a station real-time monitoring system based on a wireless sensor network of the present invention;

[0049] Figure 4It is a schematic diagram of a planar two-dimensional model structure of a first distance sensor group and a second distance sensor group of a station real-time monitoring system based on a wireless sensor network according to the present invention;

[0050] Figure 5 The present invention is a schematic diagram of a planar two-dimensional model structure of a third distance sensor group and a fourth distance sensor group of a station real-time monitoring system based on a wireless sensor network. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] See also Figures 1 to 5 ,The present invention provides a technical solution: a station real-time monitoring system based on a wireless sensor network, the station real-time monitoring system includes a data acquisition module, a model positioning module, a data processing module and a determination display module;

[0053] The data acquisition module uses the wireless sensor network to perform real-time data acquisition on the passenger positions of the subway station. The model positioning module is used to perform coordinate value positioning of the wireless sensors in the wireless sensor network in a two-dimensional model. The data processing module is used to process and calculate the passenger position data collected by the data acquisition module and the coordinate value positioning data of the wireless sensors in the wireless sensor network. The determination and display module is used to verify and display the results processed and calculated by the data processing module.

[0054] The output ends of the data acquisition module and the model positioning module are electrically connected to the input end of the data processing module, and the output end of the data processing module is electrically connected to the input end of the determination and display module.

[0055] According to the above technical solution, the data acquisition module includes a distance sensor group and a pressure sensor group;

[0056] The wireless sensor network is composed of a distance sensor group and a pressure sensor group, and the output ends of the distance sensor group and the pressure sensor group are electrically connected to the input end of the data processing module;

[0057] The distance sensor group is installed at the connection of subway cars and at the doors of subway cars to detect whether there are passengers getting on or off the train and whether there are passengers changing cars to take the subway, so as to determine the number of passengers in the car and the degree of crowding in the car. The pressure sensor group is installed under the seats of the subway car to detect whether there are passengers sitting on the seats, so as to determine the number of empty seats in the car.

[0058] The model positioning module includes a plane model building unit, a coordinate system building unit, a coordinate value positioning unit and a label assigning unit;

[0059] The plane model building unit outputs a plane two-dimensional model, the output end of the coordinate system building unit is connected to the plane two-dimensional model, the output end of the coordinate value positioning unit is connected to the distance sensor group, the output end of the label assigning unit is connected to the input end of the distance sensor group and the pressure sensor group, and the distance sensor group is positioned in the plane two-dimensional model;

[0060] The plane model building unit is used to build a two-dimensional plane model of the plane where the distance sensor group is located, so as to uniformly manage the distance sensor group in the wireless sensor network; the coordinate system building unit is used to build a rectangular coordinate system of the plane where the two-dimensional plane model is located, so as to locate the position of each distance sensor in the distance sensor group; the coordinate value positioning unit is used to assign a coordinate value to each distance sensor in the rectangular coordinate system, and determine the walking direction of the passengers by locating the coordinate value of each distance sensor in the distance sensor group; the label assigning unit is used to assign label information to each distance sensor and pressure sensor in the wireless sensor network, so as to determine the detected position according to the label information of the distance sensor and the pressure sensor, so as to determine the number of passengers in the subway car and the number of empty seats in the car.

[0061] According to the above technical solution, the distance sensor group is divided into a first distance sensor group, a second distance sensor group, a third distance sensor group and a fourth distance sensor group;

[0062] The first distance sensor group is installed on both sides of the subway car connection, the second distance sensor group is installed on the top of the subway car connection, the third distance sensor group is installed on both sides of the subway car door, and the fourth distance sensor group is installed on the top of the subway car door;

[0063] The data acquisition module also includes a time recording unit, the output end of the time recording unit is electrically connected to the input end of the data processing module;

[0064] The time recording unit is used to start timing when the distance sensor group detects a distance change, and the timing time is represented by T, and stop timing when the same distance sensor detects that the distance changes again;

[0065] When T≥t, it indicates that the distance sensor is blocked, where t represents a set time threshold.

[0066] By using the first distance sensor group and the third distance sensor group, the number of passengers getting on and off the carriage and the number of passengers changing carriages can be detected when there are fewer passengers in the carriage. By using the second distance sensor group and the fourth distance sensor group, the number of passengers getting on and off the carriage and the number of passengers changing carriages can be detected when there are more passengers in the carriage. Because when there are more passengers in the carriage, the first distance sensor group and the third distance sensor group may be blocked, resulting in affecting the detection of the number of passengers in the carriage. By installing the second distance sensor group and the fourth distance sensor group at the top, even if the first distance sensor group and the third distance sensor group are blocked by passengers, it will not affect the detection of the number of passengers getting on and off the carriage and the number of passengers changing carriages. When the data detected by the first distance sensor group, the second distance sensor group, the third distance sensor group and the fourth distance sensor group do not change within time t, it indicates that there are more people in the carriage and the distance sensor groups are all blocked.

[0067] According to the above technical solution, the data processing module includes a central control unit and a data analysis unit;

[0068] The central control system is used to intelligently control the entire system, and the data analysis unit is used to determine the movement of passengers based on the detection data of the distance sensor, the label assigned by the label assigning unit, and the positioning data of the coordinate value positioning unit, so as to judge the number of people in the subway car;

[0069] The output end of the data analysis unit is electrically connected to the input end of the central control unit.

[0070] According to the above technical solution, the data collection module also includes a unit for counting the number of people entering and leaving the station;

[0071] The station entry and exit counting unit counts the number of people entering and leaving the station through the station entry and exit gates, compares it with the number of people counted in the carriage, and determines whether the monitored number of people falls within the floating range;

[0072] The determination display module includes a number verification unit and a display screen;

[0073] The number verification unit is used to verify the analysis result of the data analysis unit according to the number of people entering and leaving the station counted by the number of people entering and leaving the station counting unit and the total number of people in the current carriage, so as to further determine and verify the number of people in the current carriage; the display screen is installed in the middle of each carriage at the subway stop position on the subway platform, and is used to display the current number of people and the number of empty seats in each carriage of the subway before the subway arrives at the station, so that passengers can choose a carriage with fewer people to take, thereby realizing the diversion of passengers;

[0074] The output end of the station entry and exit counting unit is electrically connected to the input end of the number verification unit, the output end of the number verification unit is electrically connected to the input end of the central control unit, and the output end of the central control unit is electrically connected to the input end of the display screen.

[0075] The number of passengers in each subway car is displayed on a display screen, so that passengers can know the crowdedness of each car in advance and choose a subway car with fewer passengers to ride. This can effectively divert subway passengers, avoid crowded subway cars, and provide passengers with a better riding environment.

[0076] According to the above technical solution, the first distance sensor group and the third distance sensor group establish a first plane two-dimensional model, the second distance sensor group and the fourth distance sensor group establish a second plane two-dimensional model, the coordinate system establishment unit establishes a first plane rectangular coordinate system for the first plane two-dimensional model, the coordinate system establishment unit establishes a second plane rectangular coordinate system for the second plane two-dimensional model, and the coordinate value positioning unit assigns the distance sensor in the first plane rectangular coordinate system with a coordinate value (X i , Y i ), the coordinate value positioning unit assigns the distance sensor in the second plane rectangular coordinate system a coordinate value (M i , N i ), the label assigning unit assigns the subway car location information of each sensor in the first distance sensor group, the second distance sensor group, the third distance sensor group and the fourth distance sensor group, so as to determine the corresponding car number information detected by each distance sensor.

[0077] According to the above technical solution, the initial detection distance of each distance sensor group in the distance sensor group is L, and the first distance sensor group and the second distance sensor group are divided into three rows and arranged in a matrix, so that the passenger's travel trajectory can be confirmed to determine whether the passenger has changed the car to ride, so that the change in the number of passengers inside the car can be accurately understood. The distance sensors with coordinates (X0, Y0), (X1, Y0) and (X2, Y0) in the first distance sensor group labeled as the connection between the i-th car and the i+1-th car detect distance changes within the intervals T=T1≤ts and T=T2≤ts, and the data analysis The unit retrieves the tags of the distance sensor locations with coordinates (X0, Y0), (X1, Y0) and (X2, Y0). The data analysis unit calculates (X1, Y0)-(X0, Y0)=(1,0), (X2, Y0)-(X1, Y0)=(1,0) according to the coordinate values ​​(X0, Y0)=(0,0), (X1, Y0)=(1,0) and (X2, Y0)=(2,0), indicating that the passenger is going from the i-th car to the i+1-th car to take the subway. The central control unit controls the display screen corresponding to the i-th car to display a decrease in the number of passengers, and the display screen corresponding to the i+1-th car to display an increase in the number of passengers.

[0078] According to the above technical solution, the coordinate value in the first distance sensor group is (X i , Y i ) detects a distance change, and the time recorded by the time recording unit is T=T3≥ts, indicating that the coordinate value is (X i , Y i ) is blocked, the second distance sensor group uploads the detection data. Because some distance sensors in the first distance sensor group are blocked at this time, the first distance sensor group will not be able to detect whether the passenger changes cars to ride. At this time, the second distance sensor group installed at the top of the car connection uploads the detection distance, which can effectively improve the accuracy of passenger monitoring and make the monitoring of the number of passengers in each car more accurate.

[0079] According to the above technical solution, the third distance sensor group and the fourth distance sensor group are divided into three rows and arranged in a matrix, so that the passenger's travel trajectory can be confirmed, so as to determine whether the passenger has changed the car to ride, so that the change in the number of passengers inside the car can be accurately understood. The distance sensors with coordinates (M0, N0), (M0, N1) and (M0, N2) in the third distance sensor group labeled on both sides of the door of the i-th car detect distance changes within the interval T = T4 ≤ ts and T5 ≤ ts, and the data analysis unit retrieves the coordinates The data analysis unit calculates (M0, N1)-(M0, N0)=(1,0), (M0, N2)-(M0, N1)=(0,1) according to the coordinate values ​​(M0, N0)=(0,0), (M0, N1)=(0,1) and (M0, N2)=(0,2), indicating that the passenger has entered the i-th carriage through the door of the i-th carriage, and the central control unit controls the display screen corresponding to the i-th carriage to increase the number of passengers by one;

[0080] The coordinate value in the third distance sensor group is (M i , N i ) detects a distance change, and the time recorded by the time recording unit is T=T6≥ts, indicating that the coordinate value is (M i , N i ) is blocked, the fourth distance sensor group uploads the detection data. Because some distance sensors in the third distance sensor group are blocked at this time, the third distance sensor group will not be able to detect whether the passenger changes cars to ride. At this time, the fourth distance sensor group installed on the top of the car door uploads the detection distance, which can effectively improve the accuracy of passenger monitoring and make the monitoring of the number of passengers in each car more accurate.

[0081] According to the above technical solution, the pressure value detected by the pressure sensor group is P, and the pressure value of each seat in the subway car is calculated according to the following formula:

[0082] p = P / i;

[0083] Where p represents the average pressure on each seat, i represents the number of seats; when p ≥ f, it means there are no empty seats;

[0084] When p<f, it indicates that there is an empty seat, and f indicates a set pressure threshold; the display screen displays whether there is an empty seat.

[0085] Embodiment 1:

[0086] The initial detection distance of each distance sensor group in the distance sensor group is L=2m. The first distance sensor group and the second distance sensor group are divided into three rows and arranged in a matrix, so that the passenger's travel trajectory can be confirmed to determine whether the passenger has changed the car to ride, so that the change in the number of passengers inside the car can be accurately understood. The distance sensors with coordinates (X0, Y0), (X1, Y0) and (X2, Y0) in the first distance sensor group labeled as the connection between the 4th car and the 5th car detect distance changes within the intervals T=T1=0.26≤t=2s and T=T2=0.21≤t=2s. The data analysis unit retrieves the tags of the distance sensor locations with coordinates (X0, Y0), (X1, Y0) and (X2, Y0). The data analysis unit calculates (X1, Y0)-(X0, Y0)=(1,0), (X2, Y0)-(X1, Y0)=(1,0) based on the coordinate values ​​(X0, Y0)=(0,0), (X1, Y0)=(1,0) and (X2, Y0)=(2,0), indicating that the passenger is going from the 4th car to the 5th car to take the subway. The central control unit controls the display screen corresponding to the 4th car to display a decrease in the number of passengers, and the display screen corresponding to the 5th car to display an increase in the number of passengers.

[0087] The coordinate value of the first distance sensor group is (X1, Y0) and the distance change is detected. The time recorded by the time recording unit is T=T3=10≥t=2s, indicating that the distance sensor with the coordinate value (X1, Y0) is blocked. The second distance sensor group uploads the detection data. Because some distance sensors in the first distance sensor group are blocked at this time, the first distance sensor group will not be able to detect whether the passenger changes the car to ride. At this time, the second distance sensor group installed at the top of the car connection uploads the detection distance, which can effectively improve the accuracy of passenger monitoring and make the monitoring of the number of passengers in each car more accurate.

[0088] Embodiment 2:

[0089] The third distance sensor group and the fourth distance sensor group are divided into three rows and arranged in a matrix, so that the passenger's travel trajectory can be confirmed to determine whether the passenger has changed the car to ride, so that the change in the number of passengers inside the car can be accurately understood. The distance sensors with coordinates (M0, N0), (M0, N1) and (M0, N2) in the third distance sensor group labeled on both sides of the door of the sixth car detect distance changes within the intervals T = T4 = 0.15 ≤ t = 2s and T5 = 0.18 ≤ t = 2s, and the data analysis unit retrieves The tags at the locations of the distance sensors with coordinates (M0, N0), (M0, N1) and (M0, N2) are calculated by the data analysis unit according to the coordinate values ​​(M0, N0) = (0, 0), (M0, N1) = (0, 1) and (M0, N2) = (0, 2) to obtain (M0, N1) - (M0, N0) = (0, 1), (M0, N2) - (M0, N1) = (0, 1), indicating that the passenger has entered the 6th carriage through the door of the 6th carriage, and the central control unit controls the display screen corresponding to the 6th carriage to display an increase of one passenger number;

[0090] The coordinate value of the third distance sensor group is (M0, N1) and the distance change is detected. The time T=T6=12≥t=2s recorded by the time recording unit indicates that the distance sensor with the coordinate value (M0, N1) is blocked. The fourth distance sensor group uploads the detection data. Because some distance sensors in the third distance sensor group are blocked at this time, the third distance sensor group will not be able to detect whether the passenger changes the carriage to ride. At this time, the fourth distance sensor group installed on the top of the carriage door uploads the detection distance, which can effectively improve the accuracy of passenger monitoring and make the monitoring of the number of passengers in each carriage more accurate.

[0091] Embodiment three:

[0092] The third distance sensor group and the fourth distance sensor group are divided into three rows and arranged in a matrix, so that the passenger's travel trajectory can be confirmed to determine whether the passenger has changed the car to ride, so that the change in the number of passengers inside the car can be accurately understood. The distance sensors with coordinates (M0, N0), (M0, N1) and (M0, N2) in the third distance sensor group labeled on both sides of the door of the sixth car detect distance changes within the intervals T = T4 = 0.15 ≤ t = 2s and T5 = 0.18 ≤ t = 2s. The data analysis unit The tags of the distance sensor locations with coordinates (M0, N2), (M0, N1) and (M0, N0) are retrieved, and the data analysis unit calculates (M0, N1)-(M0, N2)=(0,-1), (M0, N0)-(M0, N1)=(0,-1) according to the coordinate values ​​(M0, N2)=(0,2), (M0, N1)=(0,1) and (M0, N0)=(0,0), indicating that the passenger got off the car in the 6th car, and the central control unit controls the display screen corresponding to the 6th car to display that the number of passengers increases or decreases by one.

[0093] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0094] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A station real-time monitoring system based on wireless sensor network, characterized in that: The station real-time monitoring system includes a data acquisition module, a model positioning module, a data processing module and a determination display module; The data acquisition module uses the wireless sensor network to perform real-time data acquisition on the passenger positions of the subway station. The model positioning module is used to perform coordinate value positioning of the wireless sensors in the wireless sensor network in a two-dimensional model. The data processing module is used to process and calculate the passenger position data collected by the data acquisition module and the coordinate value positioning data of the wireless sensors in the wireless sensor network. The determination and display module is used to verify and display the results processed and calculated by the data processing module. The output ends of the data acquisition module and the model positioning module are electrically connected to the input end of the data processing module, and the output end of the data processing module is electrically connected to the input end of the determination and display module; The data acquisition module includes a distance sensor group and a pressure sensor group; The wireless sensor network is composed of a distance sensor group and a pressure sensor group, and the output ends of the distance sensor group and the pressure sensor group are electrically connected to the input end of the data processing module; The distance sensor group is installed at the connection of subway cars and at the doors of subway cars to detect whether there are passengers getting on or off the train and whether there are passengers changing cars to take the subway, so as to determine the number of passengers in the car and the degree of crowding in the car. The pressure sensor group is installed under the seats of the subway car to detect whether there are passengers sitting on the seats, so as to determine the number of empty seats in the car. The model positioning module includes a plane model building unit, a coordinate system building unit, a coordinate value positioning unit and a label assigning unit; The plane model building unit outputs a plane two-dimensional model, the output end of the coordinate system building unit is connected to the plane two-dimensional model, the output end of the coordinate value positioning unit is connected to the distance sensor group, the output end of the label assigning unit is connected to the input end of the distance sensor group and the pressure sensor group, and the distance sensor group is positioned in the plane two-dimensional model; The plane model building unit is used to build a plane two-dimensional model of the plane where the distance sensor group is located, so as to uniformly manage the distance sensor group in the wireless sensor network; the coordinate system building unit is used to build a rectangular coordinate system of the plane where the plane two-dimensional model is located, so as to locate the position of each distance sensor in the distance sensor group; the coordinate value positioning unit is used to assign a coordinate value to each distance sensor in the rectangular coordinate system, and determine the walking direction of the passengers by positioning the coordinate value of each distance sensor in the distance sensor group; the label assigning unit is used to assign label information to each distance sensor and pressure sensor in the wireless sensor network, so as to determine the detected position according to the label information of the distance sensor and the pressure sensor, so as to determine the number of passengers in the subway car and the number of empty seats in the car; The distance sensor groups are divided into a first distance sensor group, a second distance sensor group, a third distance sensor group and a fourth distance sensor group; The first distance sensor group is installed on both sides of the subway car connection, the second distance sensor group is installed on the top of the subway car connection, the third distance sensor group is installed on both sides of the subway car door, and the fourth distance sensor group is installed on the top of the subway car door; The data acquisition module also includes a time recording unit, the output end of the time recording unit is electrically connected to the input end of the data processing module; The time recording unit is used to start timing when the distance sensor group detects a distance change, and the timing time is represented by T, and stop timing when the same distance sensor detects that the distance changes again; When T ≥ t, it indicates that the distance sensor is blocked, where t represents the set time threshold; The first distance sensor group and the third distance sensor group establish a first plane two-dimensional model, the second distance sensor group and the fourth distance sensor group establish a second plane two-dimensional model, the coordinate system establishment unit establishes a first plane rectangular coordinate system for the first plane two-dimensional model, the coordinate system establishment unit establishes a second plane rectangular coordinate system for the second plane two-dimensional model, and the coordinate value positioning unit assigns coordinate values ​​(X i , Y i ), the coordinate value positioning unit assigns the distance sensor in the second plane rectangular coordinate system a coordinate value (M i , N i ), the label assigning unit assigns the subway car location information of each sensor in the first distance sensor group, the second distance sensor group, the third distance sensor group and the fourth distance sensor group, so as to determine the corresponding car number information detected by each distance sensor.

2. According to claim 1, a station real-time monitoring system based on a wireless sensor network is characterized in that: The data processing module includes a central control unit and a data analysis unit; The central control unit is used to intelligently control the entire system, and the data analysis unit is used to determine the movement of passengers according to the detection data of the distance sensor, the label assigned by the label assigning unit, and the positioning data of the coordinate value positioning unit, so as to judge the number of people in the subway car; The output end of the data analysis unit is electrically connected to the input end of the central control unit.

3. The station real-time monitoring system based on wireless sensor network according to claim 1 is characterized in that: The data collection module also includes a unit for counting the number of people entering and leaving the station; The station entry and exit counting unit counts the number of people entering and leaving the station through the station entry and exit gates, compares it with the number of people counted in the carriage, and determines whether the monitored number of people falls within the floating range; The determination display module includes a number verification unit and a display screen; The number verification unit is used to verify the analysis result of the data analysis unit according to the number of people entering and leaving the station counted by the number counting unit and the total number of people in the current carriage; the display screen is installed in the middle of each carriage at the subway station platform, and is used to display the current number of people and the number of empty seats in each carriage of the subway before the subway arrives at the station; The output end of the station entry and exit counting unit is electrically connected to the input end of the number verification unit, the output end of the number verification unit is electrically connected to the input end of the central control unit, and the output end of the central control unit is electrically connected to the input end of the display screen.

4. The station real-time monitoring system based on wireless sensor network according to claim 2 is characterized in that: The initial detection distance of each distance sensor group in the distance sensor group is L, the first distance sensor group and the second distance sensor group are divided into three rows and arranged in a matrix, and the distance sensors with coordinates (X0, Y0), (X1, Y0) and (X2, Y0) in the first distance sensor group labeled as the connection between the i-th carriage and the i+1-th carriage detect distance changes within the interval T=T1≤ts and T=T2≤ts, and the data analysis unit retrieves the labels of the positions of the distance sensors with coordinates (X0, Y0), (X1, Y0) and (X2, Y0), and the data analysis unit calculates (X1, Y0)-(X0, Y0)=(1,0), (X2, Y0)-(X1, Y0)=(1,0) according to the coordinate values ​​(X0, Y0)=(0,0), (X1, Y0)=(1,0) and (X2, Y0)=(2,0), indicating that the passenger is traveling from the i-th carriage to the i+1-th carriage. When a passenger takes a subway train in a carriage, the central control unit controls the display screen corresponding to the i-th carriage to display a decrease in the number of passengers by one, and the display screen corresponding to the i+1-th carriage to display an increase in the number of passengers by one; The coordinate value of the first distance sensor group is (X i , Y i ) detects a distance change, and the time recorded by the time recording unit is T=T3≥ts, indicating that the coordinate value is (X i , Y i ) is blocked, and the second distance sensor group uploads the detection data; The third distance sensor group and the fourth distance sensor group are both divided into three rows and arranged in a matrix. The distance sensors with coordinates (M0, N0), (M0, N1) and (M0, N2) in the third distance sensor group on both sides of the door of the i-th carriage detect distance changes within the interval T=T4≤ts and T5≤ts. The data analysis unit retrieves the labels of the locations of the distance sensors with coordinates (M0, N0), (M0, N1) and (M0, N2). The data analysis unit calculates (M0, N1)-(M0, N2) according to the coordinate values ​​(M0, N0)=(0,0), (M0, N1)=(0,1) and (M0, N2)=(0,2). N0) = (0, 1), (M0, N2) - (M0, N1) = (0, 1), indicating that a passenger has entered the i-th carriage through the door of the i-th carriage, and the central control unit controls the display screen corresponding to the i-th carriage to increase the number of passengers by one; The coordinate values ​​in the third distance sensor group are (M i , N i ) detects a distance change, and the time recorded by the time recording unit is T=T6≥ts, indicating that the coordinate value is (M i , N i ) is blocked, the fourth distance sensor group uploads the detection data, wherein T1-T6 is the timing time information of the corresponding distance sensor group, and ts is the set time limit.

5. The station real-time monitoring system based on wireless sensor network according to claim 1 is characterized in that: The pressure value detected by the pressure sensor group is P, and the pressure value of each seat in the subway car is calculated according to the following formula: p=P / i; Where p represents the average pressure on each seat, i represents the number of seats; when p ≥ f, it means there are no empty seats; When p<f, it means there are empty seats, and f represents the set pressure threshold; whether there are empty seats is displayed through the display screen in the station.

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