A parking space monitoring system combining radar and geomagnetic technology

Abstract

The application relates to the technical field of parking space monitoring, and discloses a parking space monitoring system combining radar and geomagnetic technologies, which is characterized in that a radar monitoring module is arranged at the entrance and exit of a parking lot, a geomagnetic monitoring module is arranged at a parking space, and a vehicle service module including a parking space reservation function and a navigation function is arranged, so that the radar and the geomagnetic technologies are combined to reduce the deployment cost of the monitoring module for monitoring the parking space state, ensure the accurate monitoring of the parking space state of the parking lot, effectively reduce the time spent by users in searching for parking spaces, reduce the management cost of parking lot managers, and improve the utilization rate of parking spaces.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of parking space monitoring, and in particular to a parking space monitoring system combining radar and geomagnetic technology. BACKGROUND

[0002] With the acceleration of urbanization and the rapid growth of motor vehicles, parking resource management has become a major problem in the transportation system. In busy urban centers and large commercial complexes, parking lots often face problems such as unknown parking space occupation, traffic congestion, and low parking efficiency. Surveys show that drivers spend an average of more than 15 minutes searching for parking spaces, which not only affects the driver's experience but also increases the backlog of vehicles on the road.

[0003] Currently, some parking lots have introduced geomagnetic sensors to detect parking space status. Geomagnetic sensors detect whether a parking space is occupied by detecting the disturbance of the vehicle to the magnetic field, and have the advantages of low power consumption and simple maintenance. However, the detection accuracy of geomagnetic sensors has certain limitations in the detection of multiple vehicles moving at the same time or non-metallic vehicles. To improve the accuracy of parking space monitoring, some parking lots choose to further install radar sensors on the basis of the installed geomagnetic sensors, and through the cooperation of geomagnetic and radar, accurate monitoring of parking space status is achieved, but in the case of high cost caused by installing radar on parking spaces, it is difficult to deploy to all parking spaces on a large scale. SUMMARY

[0004] Therefore, the present application aims to provide a parking space monitoring system combining radar and geomagnetic technology to solve the problem of high monitoring cost required for accurate monitoring of parking space status in the prior art, and the problem of long time spent by users in searching for effective parking spaces.

[0005] The present application discloses a parking space monitoring system combining radar and geomagnetic technology, which comprises a radar monitoring module, a vehicle service module, a geomagnetic monitoring module, a communication module and a data processing module; wherein,

[0006] The radar monitoring module is arranged at the entrance and exit of the parking lot for real-time monitoring of vehicle flow and direction, and obtaining first monitoring data;

[0007] The vehicle service module further comprises a reservation unit and a navigation unit; the reservation unit is used for users to reserve parking spaces before driving into the parking lot for a first predetermined time threshold; the navigation unit is used to determine the driving route from the entrance of the parking lot to the reserved parking space according to the user's reserved parking space after the user's reservation of the parking space is successful, so that the user drives to the reserved parking space according to the driving route; and the user's reserved parking space information, the estimated time of arrival at the entrance of the parking lot and the driving route from the entrance of the parking lot to the reserved parking space are taken as first reservation data;

[0008] The geomagnetic monitoring module is embedded in each parking space to monitor the parking space status in real time and obtain the second monitoring data;

[0009] The communication module is used to upload the first monitoring data, the first reservation data, and the second monitoring data to the data processing module;

[0010] The data processing module is used to perform analysis operations based on the first monitoring data and the first reservation data to obtain a first analysis result; and using the parking space as an index, analyze the first analysis result and the second monitoring data corresponding to the same parking space in the first analysis result to obtain a second analysis result.

[0011] Furthermore, the vehicle service module also includes an update unit for updating the parking space status of the parking lot based on the second analysis result.

[0012] Furthermore, the process by which the data processing module performs analysis operations based on the first monitoring data and the first reservation data to obtain the first analysis result includes:

[0013] Based on the first monitoring data, vehicles that enter the parking lot entrance within a second preset time range before and after the expected time of arrival at the parking lot entrance in the first reservation data are determined and used as target vehicles. Based on the first monitoring data, the time when the target vehicle enters the parking lot is determined and recorded.

[0014] The target estimated time range for the target vehicle to arrive at the reserved parking space is calculated based on the driving route from the parking lot entrance to the reserved parking space and the time when the target vehicle enters the parking lot, and this is used as the first analysis result.

[0015] Furthermore, the process of analyzing the first analysis result and the second monitoring data corresponding to the same parking space in the first analysis result, using the parking space as an index, to obtain the second analysis result includes:

[0016] Set the reserved parking space in the first analysis result as the target parking space, and determine the second monitoring data corresponding to the target parking space as the target monitoring data;

[0017] Determine whether there is a change in the status of the target parking space from vacant to occupied within the target's expected time range in the target monitoring data. If so, record the moment when the target parking space changes to occupied status in the target monitoring data, and use the occupancy status of the target parking space and the moment when it changes to occupied status as the second analysis result.

[0018] Furthermore, the vehicle service module also includes a registration unit.

[0019] The registration unit is used for users to input registration information, which includes a vehicle identifier, and the vehicle identifier is used as the login information when users reserve parking spaces.

[0020] Furthermore, the first reservation data also includes vehicle identification information for the reserved parking space.

[0021] Furthermore, the system also includes a location monitoring module.

[0022] The location monitoring module is used to monitor whether a vehicle has arrived at the parking lot entrance, and when it detects that a vehicle has arrived at the parking lot entrance, it records the time of arrival as third monitoring data. This third monitoring data includes the time of arrival of the vehicle detected by the location monitoring module, as well as the vehicle's identification information.

[0023] Furthermore, before performing the operation of determining and recording the time when the target vehicle enters the parking lot based on the first monitoring data, the method further includes determining the number of vehicles entering the parking lot entrance within a second preset time range before and after the expected time of arrival at the parking lot entrance in the first reservation data, as determined by the first monitoring data. If the number of vehicles is more than one, the time when the target vehicle enters the parking lot is determined based on the vehicle identifier in the first reservation data and the third monitoring data.

[0024] Furthermore, after the target parking space is occupied by the target vehicle, the second monitoring data also includes data on the change in the status of the target parking space from occupied to vacant, as monitored by the geomagnetic monitoring module, when the target vehicle leaves the target parking space.

[0025] The vehicle service module's update unit is also used to update the parking space status of the parking lot based on data showing that the target parking space status has changed from occupied to vacant.

[0026] Furthermore, the data processing module also includes a storage unit, which is used to store a table indexed by vehicle identifier based on the first reservation data and the second monitoring data;

[0027] The table includes the time when the vehicle entered the parking lot, the parking space information, the time of entering the parking space, and the time of leaving the parking space, corresponding to the vehicle identification.

[0028] The vehicle service module also includes a parking payment unit, which is used to calculate the parking fee amount for the target vehicle based on the parking fee calculation rules of the parking lot and the table data corresponding to the target vehicle, and allows the user to complete the parking fee payment operation based on the parking fee amount.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] This invention combines radar and geomagnetic technologies to reduce the deployment cost of monitoring modules for parking space status while ensuring accurate monitoring of parking space status. It also effectively reduces the time users spend searching for parking spaces, alleviates management costs for parking lot managers, and improves the utilization rate of parking spaces. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of a parking space monitoring system that combines radar and geomagnetic technology, as disclosed in an embodiment of the present invention. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Example 1

[0035] Please see Figure 1 , Figure 1 This is a schematic diagram of a parking space monitoring system combining radar and geomagnetic technologies disclosed in an embodiment of the present invention. The system includes a radar monitoring module, a vehicle service module, a geomagnetic monitoring module, a communication module, and a data processing module; wherein,

[0036] The radar monitoring module is installed at the entrance and exit of the parking lot to monitor the flow and direction of vehicles entering and exiting in real time, and obtain the first monitoring data.

[0037] In this embodiment of the invention, the radar monitoring module can be implemented based on millimeter-wave radar or ultrasonic radar, and is not limited thereto; the first monitoring data obtained by the radar monitoring module includes, but is not limited to, the number of vehicles, the direction of travel (entering or leaving the parking lot), and the timestamp when the radar detects a vehicle.

[0038] Furthermore, it is understood that, due to the high deployment cost of radar monitoring modules, this embodiment of the invention effectively reduces monitoring costs by only setting up radar monitoring modules at the entrances and exits of parking lots.

[0039] The vehicle service module includes a reservation unit and a navigation unit.

[0040] The reservation unit allows users to reserve parking spaces before entering the parking lot, up to a first preset time threshold. Specifically, the first preset time threshold refers to the earliest time value that can be reserved in advance based on the user's expected arrival time at the parking lot. The value of the first preset time threshold is determined based on statistical historical parking space reservation data. For example, if the first preset time threshold is set to 3 minutes, when a user wants to reserve a parking space when they expect to arrive at the parking lot at 12:03, they can start using the reservation unit's reservation function to reserve a parking space as early as 12:00. The user must input their expected arrival time at the parking lot entrance when reserving the space. If the user does not input any time, the default time is the time obtained by adding the first preset time threshold to the time when the user selected an available parking space.

[0041] Understandably, the first preset time threshold is usually set to a relatively small value in order to improve the matching degree between the user's reserved parking space status and the user's actual parking space needs, and reduce the waste of reserved resources.

[0042] The navigation unit determines the driving route from the parking lot entrance to the reserved parking space after the user successfully reserves the space, allowing the user to drive to the reserved parking space according to the route. The user's reserved parking space information, estimated arrival time at the parking lot entrance, and driving route from the parking lot entrance to the reserved parking space are used as the first reservation data.

[0043] Since the signal inside parking lots is usually weak, the navigation function of the navigation unit in this embodiment of the invention is based on the local parking lot map, that is, it does not require an online network to realize the navigation function.

[0044] Specifically, the navigation unit preloads information such as the parking lot layout, parking space locations, passageway information, and entrance / exit locations. Once a user successfully reserves a parking space, the location information of the reserved parking space is associated with the location of the parking lot entrance to generate the optimal driving route from the entrance to the parking space for the user.

[0045] A geomagnetic monitoring module is embedded in each parking space to monitor the parking space status in real time and obtain secondary monitoring data.

[0046] Specifically, in this embodiment of the invention, the geomagnetic monitoring module mainly uses a Hall sensor or a magnetoresistive sensor, preferably embedded in the central area of ​​the parking space. This embodiment of the invention does not limit the number of sensors or their embedding location in the geomagnetic monitoring module. The core function of the geomagnetic monitoring module is to determine the occupancy status of the parking space by sensing the disturbance of the geomagnetic field caused by vehicles. The second monitoring data includes, but is not limited to, the currently monitored parking space identifier, the parking space status, and the specific time of the status change.

[0047] The communication module is used to upload the first monitoring data, the first reservation data, and the second monitoring data to the data processing module.

[0048] The data processing module is used to perform analysis operations based on the first monitoring data and the first reservation data to obtain the first analysis result; and using the parking space as an index, analyze the first analysis result and the second monitoring data corresponding to the same parking space in the first analysis result to obtain the second analysis result.

[0049] Furthermore, the vehicle service module also includes an update unit for updating the parking space status of the parking lot based on the second analysis result.

[0050] Furthermore, the data processing module performs analysis operations based on the first monitoring data and the first reservation data to obtain the first analysis result. The process includes:

[0051] Based on the first monitoring data, vehicles entering the parking lot entrance within a second preset time range before and after the estimated arrival time in the first reservation data are identified and designated as target vehicles. The time of entry of these target vehicles is determined and recorded based on the first monitoring data. It is understood that the estimated arrival time at the parking lot entrance may not be the same as the actual arrival time of the user. Therefore, a second preset time range is set to represent the error range between the actual arrival time and the estimated time.

[0052] The target estimated time range for the target vehicle to arrive at the reserved parking space is calculated based on the driving route from the parking lot entrance to the reserved parking space and the time when the target vehicle enters the parking lot, and this is used as the first analysis result.

[0053] Specifically, given the known route from the parking lot entrance to the reserved parking space, the time range for the target vehicle to travel from the parking lot entrance to the reserved parking space can be calculated based on the speed limit in the parking lot and the historical average speed of vehicles in the parking lot. This time range can then be added to the time when the target vehicle enters the parking lot to obtain the target estimated time range for the target vehicle to arrive at the reserved parking space.

[0054] Furthermore, the process of analyzing the first analysis result and the second monitoring data corresponding to the same parking space in the first analysis result, using parking space as an index, to obtain the second analysis result includes:

[0055] The reserved parking space in the first analysis result is set as the target parking space, and the second monitoring data corresponding to the target parking space is determined as the target monitoring data.

[0056] Determine whether there is a change in the status of the target parking space from vacant to occupied within the target's expected time range in the target monitoring data. If so, record the moment when the target parking space changes to occupied status in the target monitoring data, and use the occupancy status of the target parking space and the moment when it changes to occupied status as the second analysis result.

[0057] Preferably, the geomagnetic monitoring module for the target parking space performs monitoring data acquisition operations within the target expected time range or a larger time range centered on the target expected time range, and sends the monitoring data within the above time period to the data processing module through the communication module, so as to reduce the data processing load of the data processing module and improve the data processing efficiency.

[0058] Furthermore, the vehicle service module also includes a registration unit.

[0059] The registration unit is used for users to input registration information, which includes a vehicle identifier, and the vehicle identifier is used as the login information when users reserve parking spaces.

[0060] Specifically, users need to register their vehicle information before using the functions provided by the vehicle service module. The aforementioned vehicle identifier is a unique and irreplaceable identifier for the vehicle. Preferably, the vehicle identifier can be the vehicle's license plate number.

[0061] Furthermore, the first reservation data also includes the vehicle identification information of the reserved parking space. Specifically, the user has already logged in when using the parking space reservation function; therefore, after the user successfully reserves a parking space, the reservation information will be bound to the vehicle identification information.

[0062] Furthermore, the system also includes a location monitoring module. The location monitoring module monitors whether a vehicle has arrived at the parking lot entrance, and when it detects that a vehicle has arrived at the parking lot entrance, it records the time of arrival as third monitoring data; wherein, the third monitoring data includes the time information of the vehicle's arrival at the parking lot entrance detected by the location monitoring module, and the vehicle's identification information.

[0063] Specifically, in this embodiment of the invention, the location monitoring module function is implemented through an on-board positioning device, which includes, but is not limited to, a GNSS module, a Bluetooth module, and an RFID module. The location monitoring information from the on-board positioning device is then bound to the vehicle identification number.

[0064] When a vehicle approaches the parking area, the on-board positioning device is activated to obtain the vehicle's current location. When the vehicle is detected to have arrived at the parking lot entrance, the vehicle arrival time and vehicle identification number are sent as third monitoring data to the data processing module for data processing and analysis via the communication module.

[0065] Furthermore, before performing the operation of determining and recording the time when the target vehicle enters the parking lot based on the first monitoring data, the method further includes determining the number of vehicles entering the parking lot entrance within a second preset time range before and after the expected time of arrival at the parking lot entrance in the first reservation data, as determined by the first monitoring data. If the number of vehicles is more than one, the time when the target vehicle enters the parking lot is determined based on the vehicle identifier in the first reservation data and the third monitoring data.

[0066] Furthermore, after the target parking space is occupied by the target vehicle, the second monitoring data also includes data on the change in the status of the target parking space from occupied to vacant, as monitored by the geomagnetic monitoring module, when the target vehicle leaves the target parking space.

[0067] The vehicle service module's update unit is also used to update the parking space status of the parking lot based on data showing that the target parking space status has changed from occupied to available.

[0068] Furthermore, the data processing module also includes a storage unit for storing tables indexed by vehicle identifiers based on the first reservation data and the second monitoring data.

[0069] The table includes the time when the vehicle entered the parking lot, the parking space information, the time of entering the parking space, and the time of leaving the parking space, corresponding to the vehicle identification.

[0070] Furthermore, the vehicle service module also includes a parking payment unit, which is used to calculate the parking fee amount for the target vehicle based on the parking lot's parking fee calculation rules and the table data corresponding to the target vehicle, and allows the user to complete the parking fee payment operation based on the parking fee amount.

[0071] Preferably, in this embodiment of the invention, the driving route from the parking lot entrance to the reserved parking space is calculated using Dijkstra's algorithm, specifically including:

[0072] First, the parking lot path is modeled as a weighted directed graph G = (V, E), where V is the set of all nodes, each node representing a location in the parking lot, such as a parking lot entrance, parking space, or intersection; E is the set of edges between nodes, each edge representing a passage between two locations; let e ij ∈E, e ij For the i-th position v i and the j-th position v j The passage between them is for each edge e ij Assign a non-negative weight w ij Indicates position v i and v j The travel time or travel distance between them.

[0073] Let the parking lot entrance node be s and the target parking space node be t. The objective of Dijkstra's algorithm is to find the shortest path from the parking lot entrance node s to the target parking space node t, so as to minimize the total weight of the path.

[0074] The calculation process includes:

[0075] Define a distance array d[v] to represent the shortest distance from the starting node s to node v. Initially:

[0076]

[0077] Define another priority queue Q to store the nodes to be visited. Initially, add (s,0) to the queue.

[0078] Each time, retrieve the node u with the smallest current distance from the priority queue and remove it from the queue. Iterate through all nodes v connected to node u and update their shortest distances:

[0079] d[v] = min(d[v], d[u] + w uv )

[0080] Where d[u] represents the shortest known distance from node s to some intermediate node u, and w uv This represents the weight of the edge from node u to node v.

[0081] If the distance is updated, add node v and the new distance to the priority queue. The algorithm terminates when the target parking space node t is visited. A predecessor array prev[v] is set to store the predecessor node of each node. By backtracking the predecessor nodes, the shortest path from the parking lot entrance node s to the target parking space node t is reconstructed.

[0082] Furthermore, when multiple navigation routes within a parking lot overlap during the same time period, traffic congestion may occur. Preferably, incorporating traffic load data during route planning ensures that users are provided with smoother routes.

[0083] Specifically, it is set to e for each edge ij Add current load factor f ij Let $(t)$ represent the current time. Then, the new edge weights are:

[0084] w′ ij =w ij ×(1+f ij (t))

[0085] Among them, f ij (t) represents edge e ij The traffic load at time t has a value range of [0,1].

[0086] During each iteration update, calculate the real-time load for each edge:

[0087] d[v] = min(d[v], d[u] + w uv ×(1+f uv (t)))

[0088] Among them, f uv (t) represents the traffic load on the path from node u to node v at the current time t.

[0089] By performing the above operations, the user's route planning is combined with the route data of other vehicles, and high-load areas are avoided as much as possible during navigation.

[0090] Furthermore, set the load factor f uv (t) is calculated by combining real-time traffic flow data with average traffic flow data statistically collected over historical time periods:

[0091]

[0092] Where, N current N represents the number of vehicles on the path from node u to node v at time t. avg N represents the historical average number of vehicles on this route within the same time period; max This represents the maximum vehicle capacity on the route; α is a smoothing coefficient used to adjust the weight between real-time and historical data.

[0093] In this embodiment of the invention, the above operations can be used to calculate a route that allows users to travel smoothly from the entrance of the parking lot to their reserved parking space, thereby reducing the user's driving time in the parking lot and also reducing the probability of congestion in the parking lot.

[0094] Finally, it should be noted that the parking space monitoring system combining radar and geomagnetic technology disclosed in the embodiments of the present invention is only a preferred embodiment of the present invention and is only used to illustrate the technical solutions of the present invention, not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A parking space monitoring system combining radar and geomagnetic technology, characterized in that, The system includes a radar monitoring module, a vehicle service module, a geomagnetic monitoring module, a communication module, and a data processing module; among which, The radar monitoring module is installed at the entrance and exit of the parking lot to monitor the flow and direction of vehicles entering and exiting in real time and obtain the first monitoring data. The vehicle service module also includes a reservation unit and a navigation unit; the reservation unit is used to allow users to reserve parking spaces before entering the parking lot by a first preset time threshold; the navigation unit is used to determine the driving route from the parking lot entrance to the reserved parking space based on the reserved parking space after the user successfully reserves the parking space, so that the user can drive to the reserved parking space according to the driving route; and uses the user's reserved parking space information, the estimated time of arrival at the parking lot entrance, and the driving route from the parking lot entrance to the reserved parking space as the first reservation data; The geomagnetic monitoring module is embedded in each parking space to monitor the parking space status in real time and obtain the second monitoring data; The communication module is used to upload the first monitoring data, the first reservation data, and the second monitoring data to the data processing module; The data processing module is used to determine, based on the first monitoring data, vehicles entering the parking lot entrance within a second preset time range before and after the estimated time of arrival at the parking lot entrance in the first reservation data, and to use them as target vehicles. Based on the first monitoring data, the module determines and records the time when the target vehicle enters the parking lot. Based on the driving route from the parking lot entrance to the reserved parking space in the first reservation data and the time when the target vehicle enters the parking lot, the module calculates the target estimated time range for the target vehicle to arrive at the reserved parking space, and uses it as the first analysis result. The reserved parking space in the first analysis result is set as the target parking space, and the second monitoring data corresponding to the target parking space is determined as the target monitoring data. It is determined whether there is a change in the status of the target parking space from vacant to occupied within the target expected time range. If so, the time when the target parking space changes to occupied status in the target monitoring data is recorded, and the occupancy status of the target parking space and the time when it changes to occupied status are used as the second analysis result.

2. The parking space monitoring system combining radar and geomagnetic technology according to claim 1, characterized in that, The vehicle service module also includes an update unit for updating the parking space status of the parking lot based on the second analysis result.

3. The parking space monitoring system combining radar and geomagnetic technology according to claim 1, characterized in that, The vehicle service module also includes a registration unit; The registration unit is used for users to input registration information, which includes a vehicle identifier, and the vehicle identifier is used as the login information when users reserve parking spaces.

4. The parking space monitoring system combining radar and geomagnetic technology according to claim 3, characterized in that, Its features are, The first reservation data also includes vehicle identification information for the reserved parking space.

5. The parking space monitoring system combining radar and geomagnetic technology according to claim 4, characterized in that, The system also includes a location monitoring module; The location monitoring module is used to monitor whether the vehicle has arrived at the parking lot entrance, and when the vehicle arrives at the parking lot entrance, it records the time of arrival as the third monitoring data; wherein, the third monitoring data includes the time information of the vehicle's arrival at the parking lot entrance monitored by the location monitoring module, and the vehicle identification information.

6. The parking space monitoring system combining radar and geomagnetic technology according to claim 5, characterized in that, Before performing the operation of determining and recording the time when the target vehicle enters the parking lot based on the first monitoring data, the method further includes determining the number of vehicles entering the parking lot entrance within a second preset time range before and after the expected time of arrival at the parking lot entrance in the first reservation data, as determined by the first monitoring data. If the number of vehicles is more than one, the time when the target vehicle enters the parking lot is determined based on the vehicle identifier in the first reservation data and the third monitoring data.

7. The parking space monitoring system combining radar and geomagnetic technology according to claim 6, characterized in that, After the target parking space is occupied by the target vehicle, the second monitoring data also includes data on the change in the status of the target parking space from occupied to vacant, as monitored by the geomagnetic monitoring module when the target vehicle leaves the target parking space. The vehicle service module's update unit is also used to update the parking space status of the parking lot based on data showing that the target parking space status has changed from occupied to vacant.

8. The parking space monitoring system combining radar and geomagnetic technology according to claim 7, characterized in that, The data processing module further includes a storage unit, which is used to store a table indexed by vehicle identification based on the first reservation data and the second monitoring data. The table includes the time when the vehicle entered the parking lot, the parking space information, the time of entering the parking space, and the time of leaving the parking space, corresponding to the vehicle identification. The vehicle service module also includes a parking payment unit, which is used to calculate the parking fee amount for the target vehicle based on the parking fee calculation rules of the parking lot and the table data corresponding to the target vehicle, and allows the user to complete the parking fee payment operation based on the parking fee amount.

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