A method and system for reverse parking lot search without relying on parking space cameras

Abstract

The present invention provides a method and system for reverse parking lot vehicle retrieval without relying on parking space cameras, relating to the technical field of parking lot management. The method comprises: identifying at least two Bluetooth device MAC addresses and the license plate number corresponding to the current vehicle, and storing them in a license plate number database; performing secondary evidence collection, and uploading all scan results within a first preset time period to the license plate number database; determining a parking space as a pending parking space if at least two Bluetooth device MAC addresses are identical to those in the license plate number database; determining the pending parking space as a target parking space if any Bluetooth device MAC address is reduced and the duration of the electronic tag unreadable exceeds a second preset time period; and storing the license plate number and target parking space in a preset vehicle retrieval system, thereby achieving reverse parking lot vehicle retrieval without relying on parking space cameras. The present invention can utilize the increase or decrease of device numbers to filter wireless signals corresponding to passing vehicles, pedestrians, and drivers, thereby improving vehicle retrieval accuracy and reducing vehicle retrieval service investment.

Description

Technical Field

[0001] The present invention relates to the technical field of parking lot management, and in particular to a method and system for realizing reverse vehicle search in a parking lot without relying on parking space cameras. Background Art

[0002] In the car-finding service provided by existing parking lots, finding a vehicle basically relies on a license plate recognition camera and an ultrasonic sensor or other type of vehicle detector installed directly in front of the parking space. The ultrasonic sensor or other type of vehicle detector is used to sense the vehicle entering the parking space, and then the license plate recognition camera is triggered to recognize the vehicle's license plate number. The specific parking space where a vehicle with a certain license plate number is parked is determined by the location and recognition range of the license plate recognition camera, and then an Internet access interface is released to the outside world. Car seekers can query the vehicle's parking location and view parking photos by entering the license plate number. Although this management model can effectively realize the accurate recording and identification of vehicles parked in a specific parking space, the cost is huge. As of now, the utilization rate of parking lots in relevant data statistics has never exceeded 1%.

[0003] Some car-finding strategies have emerged on the market that use wireless device scanners to scan signals from vehicles and drivers' mobile phones, then infer the vehicle's parking location based on the scanner's location. However, these strategies essentially rely on the vehicle detector working in conjunction with the wireless device scanner to obtain the wireless device number scanned by the vehicle detector during incoming vehicle signals, then determine whether it is the driver's mobile phone or vehicle computer, and thus determine the vehicle's last seen location as the parking location. However, this method fails to account for signal interference and the impact of wireless devices carried by passing vehicles, pedestrians, and drivers in the parking lot. As a result, the data is not effectively filtered out, and the parking location determined in practice is subject to significant misjudgment, making it ineffective in practice.

[0004] The industry urgently needs a control method that requires relatively low investment and can achieve accurate car search. However, there is currently no technical solution that can solve the above technical problems, and there is no method or system for reverse car search in a parking lot that does not rely on parking space cameras. Summary of the Invention

[0005] The present invention provides a method and system for reverse car search in a parking lot without relying on parking space cameras. Based on the scanning results of Bluetooth devices and combined with the application of Bluetooth electronic tags on parking spaces, data screening is performed to ultimately obtain accurate car search results.

[0006] In a first aspect, the present invention provides a method for reversely finding a car in a parking lot without relying on a parking camera, comprising:

[0007] Identifying at least two Bluetooth device MAC addresses corresponding to the current vehicle and a license plate number corresponding to the current vehicle within a preset area of the entryway, wherein the at least two Bluetooth device MAC addresses include the Bluetooth device MAC address of the current vehicle and the Bluetooth device MAC address of at least one driver;

[0008] The at least two Bluetooth device MAC addresses and the license plate number corresponding to the current vehicle are stored in a license plate number database. When the duration during which the electronic tag on any parking space in the parking lot cannot be read exceeds a first preset time period, all scanning results obtained by the Bluetooth device on the parking space corresponding to the electronic tag within the first preset time period are uploaded to the license plate number database. The electronic tag is tested for installation before installation so that it can be read by the Bluetooth device on the parking space when there is no vehicle on the parking space. When the electronic tag is on the parking space, the metal shielding effect of the vehicle body is utilized to prevent the electronic tag from being read by the Bluetooth device on the parking space. The Bluetooth device on the parking space is used to identify the reading status of the electronic tags on multiple parking spaces within a preset range, the Bluetooth device MAC addresses of the vehicles and drivers in the parking spaces, and the Bluetooth device MAC addresses of passing vehicles and pedestrians.

[0009] If at least two Bluetooth device MAC addresses in the scanning result are identical to at least two Bluetooth device MAC addresses in the license plate database, the berth is determined to be the pending berth for the current vehicle; if any Bluetooth device MAC address is missing from the scanning result and the duration during which the electronic tag on the berth cannot be read exceeds a second preset time length, the pending berth is determined to be the target berth for the current vehicle;

[0010] The license plate number of the current vehicle and the target parking space are stored in a preset vehicle search system, so as to realize reverse vehicle search in a parking lot without relying on parking space cameras according to the preset vehicle search system.

[0011] According to the method provided by the present invention for realizing reverse vehicle search in a parking lot without relying on a parking space camera, the entrance channel preset area is a preset area that is allowed to be scanned by an entrance Bluetooth device by adding a metal shielding cover when the vehicle is waiting to enter the parking lot through the entrance channel. The entrance channel preset area is the main driving area and the co-pilot area of the vehicle.

[0012] According to the method for realizing reverse car search in a parking lot without relying on a parking space camera provided by the present invention, the electronic tag is a passive Bluetooth tag, which is set at the bottom of the berth, and each berth corresponds to a passive Bluetooth tag;

[0013] Before storing the at least two Bluetooth device MAC addresses and the license plate number corresponding to the current vehicle in the license plate number database, the method further includes:

[0014] Divide all parking spaces in the parking lot and determine all passive Bluetooth tags covered by the Bluetooth device within the preset range in each parking lot;

[0015] Adjust the transmission power of the Bluetooth device in the field and use a metal shield to control the scanning range of the Bluetooth device in the field so that any passive Bluetooth tag can be read by the Bluetooth device in the field when there is no vehicle on the berth. Test the placement of the passive Bluetooth tag to ensure that any passive Bluetooth tag cannot be read by the Bluetooth device in the field when there is a vehicle on the berth.

[0016] According to the method for reverse parking lot vehicle search without relying on parking space cameras provided by the present invention, when the scanning result reduces the MAC address of any Bluetooth device and the duration for which the electronic tag on the parking space cannot be read exceeds a second preset time period, determining the pending parking space as the target parking space for the current vehicle includes:

[0017] After determining the pending berth for the current vehicle, continuously reading MAC addresses of all Bluetooth devices using the Bluetooth device in the field;

[0018] In a case where it is determined that any Bluetooth device MAC address is reduced from the set of the at least two Bluetooth device MAC addresses, determining the reduced Bluetooth device MAC address as the Bluetooth device MAC address of the current vehicle, and determining a duration during which the electronic tag on the berth cannot be read;

[0019] If it is determined that the duration for which the electronic tag on the berth cannot be read exceeds the second preset time period, determining the pending berth as the target berth for the current vehicle;

[0020] The first preset duration is shorter than the second preset duration.

[0021] According to the method for realizing reverse parking lot vehicle search without relying on parking space cameras provided by the present invention, determining the pending parking space as the target parking space of the current vehicle includes:

[0022] Determining, based on the Bluetooth device MAC address of the current vehicle, a Bluetooth device MAC address of at least one driver in the set of the at least two Bluetooth device MAC addresses;

[0023] When it is determined that the signal strength of the Bluetooth signal corresponding to the MAC address of the driver's Bluetooth device is gradually decreasing, the undetermined parking space is determined to be the target parking space for the current vehicle.

[0024] According to the method for realizing reverse vehicle search in a parking lot without relying on a parking space camera provided by the present invention, after storing the at least two Bluetooth device MAC addresses and the license plate number corresponding to the current vehicle in the license plate number database, the method further includes:

[0025] If the electronic tag on any parking space in the parking lot cannot be read for a period of time exceeding a first preset time, recording the parking time of the current vehicle;

[0026] determining a parking time of the current vehicle at the berth according to the current time and the parking time;

[0027] In a case where the parking time exceeds a third preset time, the parking space is marked and an instruction is generated, wherein the instruction is used to notify the current vehicle to leave.

[0028] According to the method for realizing reverse parking lot search without relying on parking space cameras provided by the present invention, the storing of the license plate number of the current vehicle and the target parking space in a preset parking search system includes:

[0029] determining a berth position of the target berth according to the berth number of the target berth;

[0030] The corresponding relationship between the license plate number of the current vehicle and the parking space position is stored in the preset vehicle search system.

[0031] According to the method for realizing reverse car search in a parking lot without relying on a parking space camera provided by the present invention, after storing the correspondence between the license plate number of the current vehicle and the parking space position in the preset car search system, the method further includes:

[0032] Receiving a first vehicle search instruction from a user, wherein the first vehicle search instruction is determined based on the user inputting a target license plate number in a preset vehicle search interface;

[0033] In response to the vehicle search instruction, a target parking space position of the vehicle corresponding to the target license plate number is determined from the preset vehicle search system according to the target license plate number.

[0034] According to the method for realizing reverse parking lot vehicle search without relying on parking space cameras provided by the present invention, after determining the target parking space position of the vehicle corresponding to the target license plate number from the preset vehicle search system according to the target license plate number, the method further includes:

[0035] receiving a second vehicle search instruction from the user, wherein the second vehicle search instruction is used to instruct a vehicle search path for determining the target parking space location based on the user's current query location;

[0036] In response to the second vehicle search instruction, generating a vehicle search path for the target license plate number in a preset electronic map of the preset vehicle search system according to the current query location and the target parking space location;

[0037] The current query location is determined based on the current positioning of the user's smart terminal, or based on the scanning location of the QR code corresponding to the preset car search interface, and the preset car search interface is a web page or a mini program.

[0038] In a second aspect, a system for reversely finding a car in a parking lot without relying on a parking space camera is provided, and a method for reversely finding a car in a parking lot without relying on a parking space camera is utilized, comprising a control unit, an entrance Bluetooth device and a license plate recognition camera provided at an entrance passage, all Bluetooth devices provided in the parking lot, and an electronic tag provided on each parking space within the coverage area of each Bluetooth device in the parking lot;

[0039] The control unit is communicatively connected with the entrance Bluetooth device, the license plate recognition camera at the parking lot entrance, and all Bluetooth devices within the parking lot.

[0040] The present invention provides a method and system for reverse car search in a parking lot without relying on parking space cameras. The method utilizes the fact that both the vehicle's head unit and the driver's mobile phone are equipped with Bluetooth devices (WIFI, Bluetooth) when entering the parking lot. The method obtains the device number by scanning the vehicle-mounted Bluetooth device and the driver's mobile phone, and uses the screened Bluetooth device MAC address as the vehicle's auxiliary identification mark. The method also proposes an innovative strategy for reverse use of the Bluetooth electronic tag, that is, reading the electronic tag information is normal, while failure to read the electronic tag information indicates that the vehicle is parked, which greatly improves the accuracy of car search. Compared with other solutions that use wireless device scanning devices to scan the device numbers of vehicle heads-up units and driver's mobile phones in the parking lot to obtain the parking location, the present invention utilizes the increase and decrease of device numbers to screen the wireless signal data carried by passing vehicles, pedestrians, and drivers when walking. This not only greatly reduces the investment in car search services, but is also more accurate than other car search solutions, breaking the reliance on using parking space cameras to achieve car search services. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 This is a flow chart of a method for realizing reverse car search in a parking lot without relying on a parking space camera provided by the present invention;

[0043] Figure 2 This is one of the schematic diagrams of the system for realizing reverse car search in a parking lot without relying on parking space cameras provided by the present invention;

[0044] Figure 3 This is the second schematic diagram of the system for realizing reverse car search in a parking lot without relying on parking space cameras provided by the present invention. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0046] Figure 1 : This is a flow chart of a method for realizing reverse car search in a parking lot without relying on a parking space camera provided by the present invention. The method for realizing reverse car search in a parking lot without relying on a parking space camera includes:

[0047] Step 101: Identify at least two Bluetooth device MAC addresses corresponding to a current vehicle and a license plate number corresponding to the current vehicle within a preset area of an entryway, wherein the at least two Bluetooth device MAC addresses include the Bluetooth device MAC address of the current vehicle and the Bluetooth device MAC address of at least one driver;

[0048] Step 102: Store the MAC addresses of the at least two Bluetooth devices and the license plate number corresponding to the current vehicle in a license plate number database. When the duration for which an electronic tag on any parking space in the parking lot cannot be read exceeds a first preset time period, upload all scan results obtained by the Bluetooth device in the parking lot corresponding to the electronic tag within the first preset time period to the license plate number database. The electronic tag is tested for installation before installation so that it can be read by the Bluetooth device in the parking lot when there is no vehicle in the parking space. When there is a vehicle in the parking space, the electronic tag cannot be read by the Bluetooth device in the parking lot by utilizing the metal shielding effect of the vehicle body. The Bluetooth device in the parking lot is used to identify the reading status of the electronic tags on multiple parking spaces within a preset range, the Bluetooth device MAC addresses of the vehicles and drivers in the parking spaces, and the Bluetooth device MAC addresses of passing vehicles and pedestrians.

[0049] Step 103: If at least two Bluetooth device MAC addresses in the scan result are identical to at least two Bluetooth device MAC addresses in the license plate database, the berth is determined to be a pending berth for the current vehicle; if any Bluetooth device MAC address is missing from the scan result and the duration during which the electronic tag on the berth cannot be read exceeds a second preset time period, the pending berth is determined to be a target berth for the current vehicle;

[0050] Step 104 : storing the license plate number of the current vehicle and the target parking space in a preset vehicle search system, so as to implement reverse vehicle search in a parking lot without relying on parking space cameras according to the preset vehicle search system.

[0051] In step 101, the present invention sets a license plate recognition camera and a Bluetooth scanning device at the entrance passage of the parking lot. The license plate recognition camera is used to capture and identify the license plate numbers of vehicles entering the parking lot. The Bluetooth scanning device is configured as an entrance Bluetooth device. When the vehicle enters the entrance passage, it scans and records the MAC addresses of Bluetooth devices inside and around the vehicle (such as the mobile phone or vehicle-mounted Bluetooth device carried by the driver). The system associates the license plate number with at least two Bluetooth device MAC addresses and stores this information for subsequent processing. The at least two Bluetooth device MAC addresses include the Bluetooth device MAC address of the current vehicle and the Bluetooth device MAC address of at least one driver, that is, the present invention at least needs to ensure that the Bluetooth device MAC address of the current vehicle is identified, and also needs to ensure that the Bluetooth device MAC address of at least one driver is identified. When it is determined that at least two Bluetooth device MAC addresses corresponding to the current vehicle and the license plate number corresponding to the current vehicle are identified, subsequent steps are executed.

[0052] Optionally, the entrance channel preset area is a preset area that the entrance Bluetooth device is allowed to scan when the vehicle is waiting to enter the parking lot through the entrance channel by adding a metal shielding cover. The entrance channel preset area is the main driving area and the co-pilot area of the vehicle.

[0053] Optionally, the metal shield is designed to limit the propagation range of the Bluetooth signal, ensuring that only Bluetooth devices from within a preset area (such as vehicle-mounted Bluetooth devices, driver and co-pilot mobile phones, etc.) can be scanned by the entrance Bluetooth device. By precisely controlling the size and shape of the metal shield, it can be ensured that the scanning area only covers the main driving and co-pilot areas, avoiding interference with other areas (such as the rear of the vehicle or passing vehicles). The preset areas are set to the main driving area and co-pilot area of the vehicle. This is because these areas usually contain the vehicle's main Bluetooth devices and the driver's personal belongings (such as mobile phones). These devices are crucial to the subsequent vehicle search process. By limiting the scanning area to these key areas, the accuracy and efficiency of the scan can be improved, while reducing unnecessary data collection and processing. The present invention uses the method of controlling the transmission power and adding a metal shield to enable the entrance Bluetooth device to only scan the head and cockpit of the vehicle in a specific area of the entrance channel.

[0054] In step 102, the present invention establishes a license plate number database for storing information such as the license plate number and Bluetooth device MAC address of the vehicle entering the parking lot. When a vehicle is parked in a berth, if the electronic tag on the berth cannot be read by the Bluetooth device in the parking lot due to the vehicle being parked, this status is recorded. If this status persists for more than a first preset duration (e.g., 5 seconds after the vehicle is parked), the Bluetooth device in the parking lot uploads all scan results within the first preset duration (including the Bluetooth device MAC addresses of the vehicle and driver, the Bluetooth device MAC addresses of passing vehicles and pedestrians, etc.) to the license plate number database. The Bluetooth device in the parking lot is also responsible for continuously scanning the reading status of the electronic tags on the berth and identifying the Bluetooth device MAC addresses of vehicles and drivers in multiple berths within a preset range. In the present invention, the Bluetooth device scanning device scans the vehicle's Bluetooth communication device or the driver's mobile phone, obtains the MAC addresses of the Bluetooth modules of these devices, and summarizes all Bluetooth device numbers obtained in a single scan into a group.

[0055] Optionally, the vehicle undergoes initial identification and evidence collection at the entrance. When the entrance Bluetooth device scans that there are Bluetooth devices in the designated area of the entrance channel and there are more than two devices, the evidence collection system analyzes to see if there is a license plate recognition record at the same time. If so, it can be considered that the vehicle entry evidence collection is completed, and the scanned Bluetooth device numbers are grouped together and reported to the vehicle search system together with the license plate number. After the vehicle drives into the site and parks at the parking space, the vehicle search system performs a secondary evidence collection system identification, and the device number of the vehicle-mounted Bluetooth device or the driver's mobile phone is scanned and identified. The secondary evidence collection system uses the electronic tag placed in the parking space to know that a vehicle is parked. According to the time when the Bluetooth electronic tag cannot be read, the vehicle parking time is determined, and then the Bluetooth device scan result data is filtered out, and only the Bluetooth device scan result 5 seconds before the vehicle is parked is retained. All scan results during the period are grouped and reported to the vehicle search system.

[0056] Optionally, the electronic tag is a passive Bluetooth tag, which is set at the bottom of the berth, and each berth corresponds to a passive Bluetooth tag;

[0057] Before storing the at least two Bluetooth device MAC addresses and the license plate number corresponding to the current vehicle in the license plate number database, the method further includes:

[0058] Divide all parking spaces in the parking lot and determine all passive Bluetooth tags covered by the Bluetooth device within the preset range in each parking lot;

[0059] Adjust the transmission power of the Bluetooth device in the field and use a metal shield to control the scanning range of the Bluetooth device in the field so that any passive Bluetooth tag can be read by the Bluetooth device in the field when there is no vehicle on the berth. Test the placement of the passive Bluetooth tag to ensure that any passive Bluetooth tag cannot be read by the Bluetooth device in the field when there is a vehicle on the berth.

[0060] Optionally, the parking spaces corresponding to the Bluetooth electronic tags in the venue are marked on the parking lot map and associated with the coordinates or numbers on the parking lot plan or three-dimensional map. The parking lot electronic map includes the coordinates and numbers of the parking spaces and a route map from each parking space to each point on the map. A Bluetooth electronic tag is placed at each parking space. The Bluetooth electronic tag uses a passive Bluetooth tag, which is a low-power sensor tag that does not require power and can perform perception, storage and communication. The tag is powered by collecting surrounding wireless radio frequency energy and uses this energy to send the tag's unique identification code data and sensor readings. The passive electronic tag does not have a built-in battery, but extracts the power required for its operation from the radio frequency energy emitted by the tag reader, and the Bluetooth device scanning device has a tag reader function.

[0061] Optionally, the present invention also designs a secondary evidence collection system, which includes an on-site Bluetooth device and a Bluetooth electronic tag. Specifically, several on-site Bluetooth devices are placed in the parking lot and their scanning signal coverage is tested. According to the parking lot marking position, the transmission power of the on-site Bluetooth device is adjusted and the scanning range of the device is controlled by using a metal shielding cover, so that each on-site Bluetooth device only scans and covers the designated parking range. Specifically, during the test, when there is no car parked in the parking lot, the on-site Bluetooth device can successfully scan the Bluetooth tag; when there is a car parked in the parking lot, due to the shielding effect of the car's metal shell, the scanning signal of the on-site Bluetooth device is shielded by the car body, and the Bluetooth electronic tag cannot be scanned. After the test is completed, the optimal placement position of each on-site Bluetooth device will be obtained.

[0062] In step 103, the system compares and analyzes the uploaded scan results, searching for information that matches the Bluetooth device MAC addresses stored in the license plate database. If at least two Bluetooth device MAC addresses in the scan results match at least two Bluetooth device MAC addresses stored in the license plate database, the parking space is preliminarily determined to be the target parking space for the current vehicle. Subsequently, if any Bluetooth device MAC address is removed from the scan results (e.g., the vehicle is powered off and the onboard Bluetooth device stops working), and the electronic tag on the parking space remains unreadable, i.e., the vehicle remains parked in the parking space, and this state persists for more than a second predetermined time period, such as 10 minutes after the driver exits the vehicle, the target parking space is determined to be the target parking space for the current vehicle. The present invention further confirms the presence of Bluetooth device MAC addresses in the scan results and the reading status of the electronic tags. This system can reduce misjudgments caused by short stops, passing vehicles, or misidentifications by comparing and analyzing the scan results with the information in the database. The system can more accurately determine the vehicle's parking location by comparing and analyzing the scan results with the information in the database. The requirement for at least two Bluetooth device MAC addresses to match increases the reliability of the determination.

[0063] Optionally, after performing data comparison and analysis, if the present invention finds that the most recent scan result of a Bluetooth device in the parking lot matches the scan result of a Bluetooth device obtained at the entrance, and that the scan result contains the Bluetooth electronic tag information of a parking space, the map coordinates of the Bluetooth electronic tag in the parking lot are located, and the license plate number corresponding to the device number group obtained from the entrance evidence collection is associated with the map coordinates to obtain the corresponding parking space coordinate location range. The system associates the license plate number with the parking space location range as the suspected parking location, i.e., the pending parking space for the current vehicle.

[0064] The vehicle search system then continues to compare data. If it finds that the most recent scan result from a Bluetooth device in the parking lot matches the device number of one of the Bluetooth device scans obtained at the entrance, but no other device numbers from the same group are found, and if it also obtains Bluetooth electronic tag information from certain parking spaces, this indicates that the carrier of the Bluetooth device is not a vehicle. Because Bluetooth electronic tags on empty parking spaces are read, proving that the Bluetooth electronic tags are not shielded by metal, it can be determined that the vehicle was not parked at the time of the scan result. The scanned Bluetooth device is the driver's mobile phone, and the driver is walking. At this point, the suspected parking location is determined to be the vehicle's parking location, and the pending parking space is determined to be the target parking space for the current vehicle.

[0065] Furthermore, the present invention obtains the electronic tag number and the location of the wireless device scanning device in the vehicle search system record, connects the points on the map according to the placement of the electronic tag and the Bluetooth scanning device, draws a route map, stores it as a vehicle search map corresponding to the license plate number of the current vehicle, and marks the determined vehicle parking location.

[0066] Optionally, when the scanning result reduces any Bluetooth device MAC address and the duration for which the electronic tag on the berth cannot be read exceeds a second preset time period, determining the pending berth as the target berth for the current vehicle includes:

[0067] After determining the pending berth for the current vehicle, continuously reading MAC addresses of all Bluetooth devices using the Bluetooth device in the field;

[0068] In a case where it is determined that any Bluetooth device MAC address is reduced from the set of the at least two Bluetooth device MAC addresses, determining the reduced Bluetooth device MAC address as the Bluetooth device MAC address of the current vehicle, and determining a duration during which the electronic tag on the berth cannot be read;

[0069] If it is determined that the duration for which the electronic tag on the berth cannot be read exceeds the second preset time period, determining the pending berth as the target berth for the current vehicle;

[0070] The first preset duration is shorter than the second preset duration.

[0071] Optionally, after determining the current vehicle's pending berth, the system uses the on-site Bluetooth device to continuously read the MAC addresses of all Bluetooth devices to ensure that changes in the Bluetooth device status can be captured in real time, especially Bluetooth devices related to the vehicle, such as the in-vehicle Bluetooth or the driver's mobile phone Bluetooth. The system monitors the collection of Bluetooth device MAC addresses. When it finds that any Bluetooth device MAC address in the collection has been reduced, it will make further judgments. The key to the present invention is to identify whether the reduced Bluetooth device MAC address is related to the current vehicle. If the reduced MAC address is the in-vehicle Bluetooth device MAC address, it usually means that the vehicle has been turned off and the in-vehicle Bluetooth is disabled. At the same time, the system continuously monitors the reading status of the electronic tag on the berth.

[0072] Optionally, since the electronic tag cannot be read when there is a vehicle parked in the berth, the system will record the time difference from the start of the vehicle parking to the present, that is, the duration of the electronic tag being unreadable, and compare the duration of the electronic tag being unreadable with a second preset time length. If the duration exceeds the second preset time length, for example 15 minutes, the system will deem that the vehicle has been stably parked in the berth for a period of time, and will then accurately determine it as the target berth for the current vehicle. By continuously monitoring the changes in the MAC address of the Bluetooth device and the reading status of the electronic tag, the present invention can more accurately determine whether the vehicle has been stably parked in a certain berth, thereby improving the accuracy of vehicle search. By identifying whether the reduced Bluetooth device MAC address is related to the current vehicle, and combining the duration of the electronic tag being unreadable, the system can reduce misjudgments caused by short stops, passing vehicles, or misidentifications.

[0073] Optionally, the first preset time should be less than the second preset time, that is, the time used to trigger the upload of the scanning results to the license plate number database should be less than the time used to determine that the vehicle is stably parked and determine the target parking space. The purpose of this setting is because the first preset time is mainly to capture the information of the vehicle's initial parking, while the second preset time is to ensure that the vehicle is stably parked and can be accurately located.

[0074] Optionally, determining the pending berth as the target berth for the current vehicle includes:

[0075] Determining, based on the Bluetooth device MAC address of the current vehicle, a Bluetooth device MAC address of at least one driver in the set of the at least two Bluetooth device MAC addresses;

[0076] When it is determined that the signal strength of the Bluetooth signal corresponding to the MAC address of the driver's Bluetooth device is gradually decreasing, the undetermined parking space is determined to be the target parking space for the current vehicle.

[0077] Optionally, after the pending berth of the current vehicle has been determined, the system will first identify the MAC address of the Bluetooth device of at least one driver based on the MAC address of the Bluetooth device of the current vehicle. This is because before this, the at least two Bluetooth device MAC addresses are stored in the form of a group, and then the driver's Bluetooth device MAC address is determined by comparing the information in the database. The signal strength of the Bluetooth signal corresponding to the identified driver's Bluetooth device MAC address is continuously monitored. If the driver gradually moves away from the current vehicle, the strength of the Bluetooth signal will gradually decrease with the increase of the distance. If the system detects that the signal strength of the Bluetooth signal corresponding to the MAC address of the driver's Bluetooth device gradually decreases, and this decreasing trend continues for a period of time, and the electronic tag on the pending berth still cannot be read, then the system will determine that the pending berth is the target berth of the current vehicle.

[0078] As an optional embodiment of the present invention, by monitoring the changes in the Bluetooth signal strength corresponding to the MAC address of the driver's Bluetooth device, the system can more accurately determine whether the driver has left the vehicle, thereby more accurately determining the target parking space of the vehicle. This method is more reliable than simply relying on time or changes in the number of Bluetooth devices. By combining the changes in Bluetooth signal strength and the reading status of electronic tags, the system can reduce false alarms and missed alarms caused by short stops, passing vehicles or misidentification. Only when the driver actually leaves the vehicle and the vehicle is stably parked in a certain parking space will the system determine that the parking space is the target parking space.

[0079] Optionally, after storing the at least two Bluetooth device MAC addresses and the license plate number corresponding to the current vehicle in the license plate number database, the method further includes:

[0080] If the electronic tag on any parking space in the parking lot cannot be read for a period of time exceeding a first preset time, recording the parking time of the current vehicle;

[0081] determining a parking time of the current vehicle at the berth according to the current time and the parking time;

[0082] In a case where the parking time exceeds a third preset time, the parking space is marked and an instruction is generated, wherein the instruction is used to notify the current vehicle to leave.

[0083] Optionally, when an electronic tag on any parking space in a parking lot cannot be read for a period exceeding a first preset duration, this typically indicates that a vehicle is parked in that space, as the electronic tag is obscured when a vehicle is parked, making it unreadable. In this case, the system records the current vehicle's parking time. This parking time is the point in time when the vehicle began parking and serves as the basis for subsequent parking duration calculations. The system calculates the parking duration of the current vehicle in the parking space based on the recorded parking time and the current time. This parking duration is the length of time from the time the vehicle was parked to the current time, reflecting the length of time the vehicle has been parked. If the calculated parking duration exceeds a third preset duration, which may be set according to parking lot regulations, such as the maximum permitted parking time, the system marks the parking space and generates a notification. This notification informs the current vehicle's owner or driver that their vehicle has exceeded the permitted time and needs to leave as soon as possible. Marking the parking space may be achieved by changing the parking space's status or marking it in the system, while the notification may be sent to the vehicle owner or driver via SMS, app push notification, or on-site display screens.

[0084] By automatically recording parking times and calculating parking duration, this system helps parking lot managers more effectively monitor and manage parking conditions, reducing the need for manual monitoring and improving management efficiency. Furthermore, the ability to mark parking spaces and generate parking instructions further simplifies the management process, enabling managers to more quickly respond to and address vehicles parked for excessive periods of time. This optimizes the utilization of parking resources, improves parking lot turnover, and enables more drivers to find parking spaces.

[0085] In step 104, the license plate number of the current vehicle and its corresponding target parking space information are stored in a preset vehicle search system. When the owner needs to find the vehicle, he can enter the license plate number through the vehicle search system. The system quickly locates the vehicle parking position based on the stored information and displays it on the parking lot map. The owner can find the vehicle parking position according to the map instructions.

[0086] Optionally, storing the license plate number of the current vehicle and the target parking space in a preset vehicle search system includes:

[0087] determining a berth position of the target berth according to the berth number of the target berth;

[0088] The corresponding relationship between the license plate number of the current vehicle and the parking space position is stored in the preset vehicle search system.

[0089] Optionally, after determining the target parking space for the current vehicle, the system will search and determine the specific location of the parking space based on the parking space number of the target parking space. The parking space number is usually a unique identifier for each parking space in the parking lot, through which any parking space in the parking lot can be accurately located. After determining the location of the target parking space, the correspondence between the current vehicle's license plate number and the parking space position will be stored in the preset vehicle search system. This correspondence is the basis for the operation of the vehicle search system, which allows the owner or driver to query the parking location of the vehicle by entering the license plate number when needed.

[0090] Optionally, after storing the correspondence between the license plate number of the current vehicle and the parking space position in the preset vehicle search system, the method further includes:

[0091] Receiving a first vehicle search instruction from a user, wherein the first vehicle search instruction is determined based on the user inputting a target license plate number in a preset vehicle search interface;

[0092] In response to the vehicle search instruction, a target parking space position of the vehicle corresponding to the target license plate number is determined from the preset vehicle search system according to the target license plate number.

[0093] Optionally, the user enters the target license plate number in the preset car search interface, and the system receives this input and recognizes it as the user's first car search instruction. After receiving the car search instruction, the system will search in the preset car search system according to the target license plate number entered by the user. Since the correspondence between the current vehicle's license plate number and the parking position has been stored before, the system can quickly find the parking position that matches the target license plate number and return it to the user as the target parking position.

[0094] Optionally, after determining the target parking space position of the vehicle corresponding to the target license plate number from the preset vehicle search system according to the target license plate number, the method further includes:

[0095] receiving a second vehicle search instruction from the user, wherein the second vehicle search instruction is used to instruct a vehicle search path for determining the target parking space location based on the user's current query location;

[0096] In response to the second vehicle search instruction, generating a vehicle search path for the target license plate number in a preset electronic map of the preset vehicle search system according to the current query location and the target parking space location;

[0097] The current query location is determined based on the current positioning of the user's smart terminal, or based on the scanning location of the QR code corresponding to the preset car search interface, and the preset car search interface is a web page or a mini program.

[0098] Optionally, after the user has found the target parking space for the vehicle corresponding to the target license plate number through the first car search instruction, the user may wish to further obtain a car search path from the current location to the target parking space. At this time, the user can issue a second car search instruction to instruct the system to generate a car search path based on the user's current query location. After receiving the second car search instruction, a car search path will be generated in a preset electronic map of the preset car search system based on the user's current query location and the target parking space. The car search path is the optimal path for the user to reach the target parking space from the current location, which may be calculated based on factors such as distance, time, and road conditions. The user's current query location can be determined in two ways: one is to obtain it based on the current positioning function of the user's smart terminal (such as a mobile phone, tablet, etc.); the other is to determine it based on the location of the QR code corresponding to the preset car search interface generated by the user's scan. This QR code may be posted in a conspicuous location in the parking lot. The user can open the preset car search interface by scanning the QR code and automatically use the scanned location as the current query location. The preset car search interface can be in the form of a web page or a mini program, which is convenient for users to access and use on different devices. This interface design allows users to find the car through a browser or mini program without downloading additional applications.

[0099] The present invention provides a method and system for reverse car search in a parking lot without relying on parking space cameras. The method utilizes the fact that both the vehicle's head unit and the driver's mobile phone are equipped with Bluetooth devices (WIFI, Bluetooth) when entering the parking lot. The method obtains the device number by scanning the vehicle-mounted Bluetooth device and the driver's mobile phone, and uses the screened Bluetooth device MAC address as the vehicle's auxiliary identification mark. The method also proposes an innovative strategy for reverse use of the Bluetooth electronic tag, that is, reading the electronic tag information is normal, while failure to read the electronic tag information indicates that a vehicle parking scene has occurred, which greatly improves the accuracy of car search. Compared with other solutions that use wireless device scanning devices to scan the device numbers of vehicle heads-up units and driver's mobile phones in the parking lot to obtain the parking location, the present invention utilizes the increase and decrease of device numbers to screen the wireless signal data carried by passing vehicles, pedestrians, and drivers when walking. This not only greatly reduces the investment in car search services, but is also more accurate than other car search solutions, breaking the reliance on using parking space cameras to achieve car search services.

[0100] Figure 2 This is one of the schematic diagrams of the system for reverse car search in a parking lot without relying on parking space cameras provided by the present invention. Figure 3 This is the second schematic diagram of a system for reverse car search in a parking lot without relying on parking space cameras provided by the present invention. The system for reverse car search in a parking lot without relying on parking space cameras includes a control unit, an entrance Bluetooth device and a license plate recognition camera provided at the entrance passage, all Bluetooth devices installed in the parking lot, and an electronic tag installed on each parking space within the coverage area of each Bluetooth device in the parking lot;

[0101] The control unit is communicatively connected with the entrance Bluetooth device, the license plate recognition camera and all the Bluetooth devices in the venue.

[0102] Optional, such as Figure 2 As shown, the entrance license plate recognition camera is in the normally open state. The camera is used to obtain the vehicle's license plate number through text recognition function when the vehicle enters the site; the Bluetooth device scanning device is an entrance Bluetooth device, and its detection scanning module is in the normally open state. It is used to scan the vehicle's on-board Bluetooth device or the device number of the driver's mobile phone and transmit it to the vehicle search system background.

[0103] like Figure 3 As shown, the Bluetooth device scanning device is an on-site Bluetooth device, and its detection scanning module is used to continuously scan the module's designated coverage area and store the scanning results in real time to the secondary evidence collection system; the berth Bluetooth tag module is a Bluetooth electronic tag installed on each berth, which cooperates with the on-site Bluetooth device to use the elimination method to detect whether there is a car parked in the berth. That is, when a vehicle is parked, the Bluetooth scanning device cannot read the Bluetooth electronic tag due to the metal shielding effect, and provides the secondary evidence collection system with a basis for screening out the Bluetooth device scanning result data of passing vehicles, pedestrians, and drivers' mobile phones.

[0104] The system's software process also includes inferring a vehicle's parking time by using the time the Bluetooth tag was unreadable. The data analysis system, predicated on not having access to Bluetooth tag information, filters out Bluetooth device scans from passing vehicles, pedestrians, and drivers, ensuring the precise targeting of the vehicle's parking location. The entry evidence collection system, through the addition of a shielding cover and other means, filters out Bluetooth device scans from other devices at the entrance that are unrelated to the vehicle's entry, ensuring the effectiveness of the present invention's technical solution.

[0105] The present invention proposes a method and system for realizing reverse vehicle search without relying on parking space cameras, comprising the following steps:

[0106] Establish a vehicle-finding system; install Bluetooth scanners at parking lot entrances; install Bluetooth device scanners within the lot; place Bluetooth electronic tags at parking spaces; create a map of the lot, associating the locations of the installed Bluetooth device scanners and Bluetooth electronic tags with the map numbers or coordinates of the parking spaces;

[0107] When a vehicle enters the parking lot, it is recognized by the license plate camera in the passage, and the Bluetooth device scanning device records the Bluetooth device number of the smart car computer and the driver's mobile phone. The device number is transmitted to the system backend and associated with the license plate number.

[0108] When a vehicle parks in a parking space, the system performs secondary evidence collection. During this process, the device number of the vehicle's Bluetooth device or the driver's mobile phone is scanned by a nearby Bluetooth device scanner and the scanned device number is transmitted to the system backend. At the same time, the Bluetooth scanner loses connection with the electronic tag, and the system determines that a vehicle is parked in the parking space.

[0109] The system begins a comparison. If it finds that two device numbers in the Bluetooth device scan result are the same as the Bluetooth device numbers in a certain entry record, it will associate the scan result with the license plate number in the entry record and determine the location of the electronic tag as the suspected parking spot. The system continues to collect the scan results of Bluetooth devices in the parking lot. If it finds that a single Bluetooth device that appears in the aforementioned scenario is scanned and other Bluetooth electronic tag signals are collected at the same time, it can be determined that the signal is from the driver's mobile phone and the driver is walking. In this way, the suspected parking spot is determined to be the parking spot, and the scanned points are connected on the parking lot map to draw a trajectory map and mark the parking spot.

[0110] When a car owner needs to know where their vehicle is parked, they can scan a QR code displayed on the parking lot and enter their license plate number. Upon receiving the query, the system searches the database for a trajectory map corresponding to the license plate number and presents the parking space corresponding to the Bluetooth tag in the parking area to the car seeker. The parking space's three-dimensional coordinates are then displayed on an indoor map, allowing the seeker to navigate indoors or visually search for the parking space. This method allows car owners to locate their vehicle using the license plate number, even without installing a license plate recognition camera or vehicle inspection system on the parking space.

[0111] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0112] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for reverse parking search in a parking lot without relying on parking cameras, characterized in that: include: Identifying at least two Bluetooth device MAC addresses corresponding to the current vehicle and a license plate number corresponding to the current vehicle within a preset area of the entryway, wherein the at least two Bluetooth device MAC addresses include the Bluetooth device MAC address of the current vehicle and the Bluetooth device MAC address of at least one driver; The at least two Bluetooth device MAC addresses and the license plate number corresponding to the current vehicle are stored in a license plate number database. When the duration during which the electronic tag on any parking space in the parking lot cannot be read exceeds a first preset time period, all scanning results obtained by the Bluetooth device on the parking space corresponding to the electronic tag within the first preset time period are uploaded to the license plate number database. The electronic tag is tested for installation before installation so that it can be read by the Bluetooth device on the parking space when there is no vehicle on the parking space. When the electronic tag is on the parking space, the metal shielding effect of the vehicle body is utilized to prevent the electronic tag from being read by the Bluetooth device on the parking space. The Bluetooth device on the parking space is used to identify the reading status of the electronic tags on multiple parking spaces within a preset range, the Bluetooth device MAC addresses of the vehicles and drivers in the parking spaces, and the Bluetooth device MAC addresses of passing vehicles and pedestrians. If at least two Bluetooth device MAC addresses in the scanning result are identical to at least two Bluetooth device MAC addresses in the license plate database, the berth is determined to be the pending berth for the current vehicle; if any Bluetooth device MAC address is missing from the scanning result and the duration during which the electronic tag on the berth cannot be read exceeds a second preset time length, the pending berth is determined to be the target berth for the current vehicle; The license plate number of the current vehicle and the target parking space are stored in a preset vehicle search system, so as to realize reverse vehicle search in a parking lot without relying on parking space cameras according to the preset vehicle search system.

2. The method for realizing reverse car search in a parking lot without relying on a parking space camera according to claim 1, characterized in that: The entrance channel preset area is a preset area that the entrance Bluetooth device is allowed to scan when the vehicle is waiting to enter the parking lot through the entrance channel, by adding a metal shielding cover. The entrance channel preset area is the main driving area and the co-pilot area of the vehicle.

3. The method for realizing reverse car search in a parking lot without relying on a parking space camera according to claim 1, characterized in that: The electronic tag is a passive Bluetooth tag, which is set at the bottom of the berth, and each berth corresponds to a passive Bluetooth tag; Before storing the at least two Bluetooth device MAC addresses and the license plate number corresponding to the current vehicle in the license plate number database, the method further includes: Divide all parking spaces in the parking lot and determine all passive Bluetooth tags covered by the Bluetooth device within the preset range in each parking lot; Adjust the transmission power of the Bluetooth device in the field and use a metal shield to control the scanning range of the Bluetooth device in the field so that any passive Bluetooth tag can be read by the Bluetooth device in the field when there is no vehicle on the berth. Test the placement of the passive Bluetooth tag to ensure that any passive Bluetooth tag cannot be read by the Bluetooth device in the field when there is a vehicle on the berth.

4. The method for realizing reverse car search in a parking lot without relying on a parking space camera according to claim 1, characterized in that: When the scanning result reduces any Bluetooth device MAC address and the duration for which the electronic tag on the berth cannot be read exceeds a second preset time period, determining the pending berth as the target berth for the current vehicle includes: After determining the pending berth for the current vehicle, continuously reading MAC addresses of all Bluetooth devices using the Bluetooth device in the field; In a case where it is determined that any Bluetooth device MAC address is reduced from the set of the at least two Bluetooth device MAC addresses, determining the reduced Bluetooth device MAC address as the Bluetooth device MAC address of the current vehicle, and determining a duration during which the electronic tag on the berth cannot be read; If it is determined that the duration for which the electronic tag on the berth cannot be read exceeds the second preset time period, determining the pending berth as the target berth for the current vehicle; The first preset duration is shorter than the second preset duration.

5. The method for realizing reverse car search in a parking lot without relying on a parking space camera according to claim 4, characterized in that: The determining the pending berth as the target berth for the current vehicle includes: Determining, based on the Bluetooth device MAC address of the current vehicle, a Bluetooth device MAC address of at least one driver in the set of the at least two Bluetooth device MAC addresses; When it is determined that the signal strength of the Bluetooth signal corresponding to the MAC address of the driver's Bluetooth device is gradually decreasing, the undetermined parking space is determined to be the target parking space for the current vehicle.

6. The method for realizing reverse car search in a parking lot without relying on a parking space camera according to claim 1, characterized in that: After storing the at least two Bluetooth device MAC addresses and the license plate number corresponding to the current vehicle in the license plate number database, the method further includes: If the electronic tag on any parking space in the parking lot cannot be read for a period of time exceeding a first preset time, recording the parking time of the current vehicle; determining a parking time of the current vehicle at the berth according to the current time and the parking time; In a case where the parking time exceeds a third preset time, the parking space is marked and an instruction is generated, wherein the instruction is used to notify the current vehicle to leave.

7. The method for realizing reverse car search in a parking lot without relying on a parking space camera according to claim 1, characterized in that: The storing the license plate number of the current vehicle and the target parking space in a preset vehicle search system includes: determining a berth position of the target berth according to the berth number of the target berth; The corresponding relationship between the license plate number of the current vehicle and the parking space position is stored in the preset vehicle search system.

8. The method for realizing reverse car search in a parking lot without relying on a parking space camera according to claim 7, characterized in that: After storing the correspondence between the license plate number of the current vehicle and the parking space position in the preset vehicle search system, the method further includes: Receiving a first vehicle search instruction from a user, wherein the first vehicle search instruction is determined based on the user inputting a target license plate number in a preset vehicle search interface; In response to the vehicle search instruction, a target parking space position of the vehicle corresponding to the target license plate number is determined from the preset vehicle search system according to the target license plate number.

9. The method for realizing reverse car search in a parking lot without relying on a parking space camera according to claim 8, characterized in that: After determining the target parking space position of the vehicle corresponding to the target license plate number from the preset vehicle search system according to the target license plate number, the method further includes: receiving a second vehicle search instruction from the user, wherein the second vehicle search instruction is used to instruct a vehicle search path for determining the target parking space location based on the user's current query location; In response to the second vehicle search instruction, generating a vehicle search path for the target license plate number in a preset electronic map of the preset vehicle search system according to the current query location and the target parking space location; The current query location is determined based on the current positioning of the user's smart terminal, or based on the scanning location of the QR code corresponding to the preset car search interface, and the preset car search interface is a web page or a mini program.

10. A system for reversely finding a car in a parking lot without relying on a parking space camera, utilizing the method for reversely finding a car in a parking lot without relying on a parking space camera according to any one of claims 1 to 9, characterized in that: It includes the control unit, the entrance Bluetooth device and license plate recognition camera installed at the entrance channel, all Bluetooth devices installed in the parking lot, and the electronic tags installed on each parking space within the coverage area of each Bluetooth device; The control unit is communicatively connected with the entrance Bluetooth device, the license plate recognition camera at the parking lot entrance, and all Bluetooth devices within the parking lot.

Images