Method and system for realizing reverse vehicle searching in parking lot without relying on parking space camera

Abstract

The invention provides a method and system for realizing reverse vehicle searching in a parking lot without relying on a parking space camera, and relates to the technical field of parking lot management, and the method comprises the steps: recognizing the MAC addresses and license plate numbers of at least two Bluetooth devices corresponding to a current vehicle, and storing the MAC addresses and license plate numbers in a license plate number database; secondary evidence obtaining is carried out, and all scanning results in a first preset duration are uploaded to a license plate number database; when the MAC addresses are the same as the MAC addresses of at least two Bluetooth devices in the license plate number database, the parking space is determined to be an undetermined parking space, and when the MAC address of any Bluetooth device is reduced and the duration in which the electronic tag cannot read exceeds a second preset duration, the undetermined parking space is determined to be a target parking space; and storing the license plate number and the target parking space to a preset vehicle searching system so as to realize parking lot reverse vehicle searching without depending on a parking space camera. According to the invention, wireless signals corresponding to passing vehicles, pedestrians and drivers can be screened by using increase and decrease of device numbers, so that the vehicle searching precision is improved, and the vehicle searching service investment is reduced.

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 car search in a parking lot without relying on a parking space camera. Background Art

[0002] In the car search 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 through 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 parking location of the vehicle 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. Up to now, the utilization rate of parking lots in relevant data statistics has never exceeded 1%.

[0003] There are also some car-finding strategies on the market that use wireless device scanning devices to scan vehicle and driver mobile phone signals, and then infer the parking location of the vehicle based on the location of the scanner. However, in essence, they rely on the vehicle detector to link with the wireless device scanning device to obtain the wireless device number scanned when the vehicle detector receives a vehicle signal, and then determine whether it is the driver's mobile phone or car computer, so as to obtain the last location of the vehicle as the parking location. However, this method fails to consider the signal interference and influence of wireless devices carried by vehicles, pedestrians, drivers, etc. passing through the parking lot without stopping, and the data is not effectively screened. In actual implementation, the parking location determined has a large misjudgment rate and cannot play a role in reality.

[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 realizing reverse car search in a parking lot without relying on a parking space camera. Based on the scanning result of a Bluetooth device and combined with the application of a Bluetooth electronic tag on a parking space, data screening is performed to finally obtain an accurate car search result.

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

[0007] Identify at least two Bluetooth device MAC addresses corresponding to the current vehicle and a license plate number corresponding to the current vehicle in a preset area of ​​the entryway, wherein the at least two Bluetooth device MAC addresses include a Bluetooth device MAC address of the current vehicle and a 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 length, all scanning results obtained by the Bluetooth device in the parking lot corresponding to the electronic tag within the first preset time length 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 in the parking lot when there is no vehicle in the parking lot. When there is a vehicle in the parking lot, 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 in the parking spaces and the drivers, 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 number database, the berth is determined to be a pending berth for the current vehicle; if any Bluetooth device MAC address is reduced in 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 a 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 a parking space camera according to the preset vehicle search system.

[0011] 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, 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, and the passive Bluetooth tag is arranged 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 in each parking lot within the preset range;

[0015] Adjust the transmission power of the Bluetooth device in the field, and use a metal shielding cover 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, and test the placement position 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 realizing reverse car search in a parking lot without relying on a parking space camera provided by the present invention, when the scanning result reduces any MAC address of a Bluetooth device and the duration for which the electronic tag on the parking space cannot be read exceeds a second preset time length, determining the pending parking space as the target parking space of the current vehicle includes:

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

[0018] In the case of determining that any Bluetooth device MAC address is reduced from the set of the at least two Bluetooth device MAC addresses, determining that the reduced Bluetooth device MAC address is 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 length, determining the pending berth as the target berth for the current vehicle;

[0020] Among them, the first preset time length is shorter than the second preset time length.

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

[0022] Determine, according to the Bluetooth device MAC address of the current vehicle, a Bluetooth device MAC address of at least one driver in the set where the at least two Bluetooth device MAC addresses are located;

[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 pending parking space is determined to be the target parking space of the current vehicle.

[0024] 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 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] When 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] Determine the parking time of the current vehicle in the parking space according to the current time and the parking time;

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

[0028] 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 storing of the license plate number of the current vehicle and the target parking space to a preset car 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 corresponding relationship 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 a target license plate number input by the user in a preset vehicle search interface;

[0033] In response to the vehicle search instruction, a target parking space position of a 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 car search in a parking lot without relying on a parking space camera 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 car search system according to the target license plate number, the method further includes:

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

[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 position and the target parking space position;

[0037] The current query location is determined based on the current location 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 realizing reverse car search in a parking lot without relying on a parking space camera is provided, and a method for realizing reverse car search in a parking lot without relying on a parking space camera is utilized, including a control unit, an entrance Bluetooth device and a license plate recognition camera arranged at an entrance passage, all in-parking Bluetooth devices arranged in a parking lot, and an electronic tag arranged on each parking space within the coverage range of each in-parking Bluetooth device;

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

[0040] The present invention provides a method and system for realizing reverse car search in a parking lot without relying on parking space cameras. By utilizing the characteristics that both the vehicle computer and the driver's mobile phone are equipped with Bluetooth devices (WIFI, Bluetooth) when entering the parking lot, the vehicle-mounted Bluetooth device and the driver's mobile phone are scanned to obtain the device number, and the screened Bluetooth device MAC address is used as the vehicle identity auxiliary identification mark, and an innovative strategy of using the Bluetooth electronic tag in reverse is proposed, that is, reading the electronic tag information is normal, and 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 computers and driver's mobile phones in the parking lot to obtain the parking position, the present invention utilizes the increase and decrease of the device number to screen the wireless signal data carried by passing vehicles, pedestrians, and drivers when walking, which not only greatly reduces the investment in car search services, but is also more accurate than other car search solutions, breaking the dependence on the use of parking space cameras if you want to realize 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, the following briefly introduces 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 creative work.

[0042] Figure 1 It 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 a parking space camera 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 a parking space camera provided by the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Figure 1 The present invention provides a method for realizing reverse car search in a parking lot without relying on a parking space camera, and 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 the current vehicle and a license plate number corresponding to the current vehicle in a preset area of ​​an entryway, wherein the at least two Bluetooth device MAC addresses include a Bluetooth device MAC address of the current vehicle and a Bluetooth device MAC address of at least one driver;

[0048] Step 102: store the MAC addresses of at least two Bluetooth devices and the license plate number corresponding to the current vehicle 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, upload all scanning results within the first preset time obtained by the Bluetooth device in the parking lot corresponding to the electronic tag to the license plate number database. Before the electronic tag is installed, an installation test is performed so that it can be read by the Bluetooth device in the parking lot when there is no vehicle in the parking lot. When there is a vehicle in the parking lot, 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 in the parking spaces and the drivers, and the Bluetooth device MAC addresses of passing vehicles and pedestrians.

[0049] Step 103: if at least two Bluetooth device MAC addresses in the scanning result are the same as at least two Bluetooth device MAC addresses in the license plate number database, determine the berth as the pending berth of the current vehicle; if any Bluetooth device MAC address is reduced in the scanning result and the duration during which the electronic tag on the berth cannot be read exceeds a second preset time length, determine the pending berth as the target berth of the current vehicle;

[0050] Step 104: store 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 a parking space camera 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 number of the vehicle 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 the 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, the 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 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 area is set as 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 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 so that the entrance Bluetooth device can 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 the MAC address of the Bluetooth device when the vehicle enters the parking lot. When the vehicle is parked in the parking lot, if the electronic tag on the parking lot cannot be read by the Bluetooth device in the parking lot due to the parking of the vehicle, this state is recorded. If this state lasts for more than a first preset time (such as 5 seconds after the vehicle is parked), the Bluetooth device in the parking lot uploads all scanning results within the first preset time (including the Bluetooth device MAC address of the vehicle and the driver, the Bluetooth device MAC address of the passing vehicle and pedestrian, etc.) to the license plate number database. The Bluetooth device in the parking lot is also responsible for continuously scanning the reading state of the electronic tag on the parking lot, and identifying the Bluetooth device MAC addresses of the vehicles and drivers in multiple parking lots within a preset range. In the present invention, the scanning object of the Bluetooth device scanning device is the Bluetooth communication device of the vehicle or the driver's mobile phone, and the MAC address of the Bluetooth module of these devices is obtained, and all Bluetooth device numbers obtained by a single scan are summarized as a group.

[0055] Optionally, the vehicle is initially identified and evidenced 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 venue and parks at the parking space, the vehicle search system performs a secondary evidence collection system identification, and the device number of the on-board Bluetooth device or the driver’s mobile phone is scanned and identified. The secondary evidence collection system uses the fact that the electronic tag placed in the parking space cannot be read to know that a vehicle is parked, and determines the vehicle parking time based on the time when the Bluetooth electronic tag cannot be read, and then filters out the Bluetooth device scan result data, retaining only the Bluetooth device scan result 5 seconds before the vehicle is parked, and compiles all scan results during this period into groups and reports them to the vehicle search system.

[0056] Optionally, the electronic tag is a passive Bluetooth tag, which is arranged 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 in each parking lot within the preset range;

[0059] Adjust the transmission power of the Bluetooth device in the field, and use a metal shielding cover 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, and test the placement position 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 in 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 berth marking position, the transmission power of the on-site Bluetooth device is adjusted and the scanning range of the device is controlled by a metal shielding cover, so that each on-site Bluetooth device only scans and covers the designated berth range. Specifically, during the test, when there is no car parked in the berth, the on-site Bluetooth device can successfully scan the Bluetooth tag; when there is a car parked in the berth, due to the shielding effect of the metal shell of the car, 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, and searches for information matching the Bluetooth device MAC address stored in the license plate number database. If at least two Bluetooth device MAC addresses in the scan results are the same as at least two Bluetooth device MAC addresses stored in the license plate number database, the parking space is preliminarily determined to be the pending parking space of the current vehicle. Subsequently, if any Bluetooth device MAC address is reduced in the scan results (such as the vehicle is powered off and the vehicle-mounted Bluetooth device stops working), and the electronic tag on the parking space still cannot be read, that is, the vehicle is still parked in the parking space, and this state lasts for more than a second preset time, such as 10 minutes after the driver gets off the vehicle, then the pending parking space is determined to be the target parking space of the current vehicle. The present invention further confirms the stage, that is, monitors the reduction of the Bluetooth device MAC address in the scan results and the reading state of the electronic tag, so that the system can reduce misjudgments caused by short stays, passing vehicles or misidentification. By comparing and analyzing the scan results with the information in the database, the system can more accurately determine the location of the vehicle, and the matching requirement of at least two Bluetooth device MAC addresses increases the reliability of the judgment.

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

[0064] Furthermore, the vehicle search system continues to compare data. If it finds that the most recent scan result of a Bluetooth device in the field is consistent with the device number of the Bluetooth device scan result obtained at the entrance, but there is no device number of other devices in the same group. At the same time, the Bluetooth electronic tag information of certain berths is obtained, which indicates that the carrier of the Bluetooth device is not a vehicle, because the Bluetooth electronic tag on the empty berth will be read, proving that the Bluetooth electronic tag is not shielded by metal. It can be determined that the vehicle was not parked when the scan result occurred. At this time, the scanned Bluetooth device is the driver's mobile phone, and the driver is walking. At this time, the suspected parking location is determined as the vehicle parking location, that is, the pending berth is determined to be the target berth of 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 length, 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 the MAC addresses of all Bluetooth devices using the Bluetooth device in the field;

[0068] In the case of determining that any Bluetooth device MAC address is reduced from the set of the at least two Bluetooth device MAC addresses, determining that the reduced Bluetooth device MAC address is 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 length, determining the pending berth as the target berth for the current vehicle;

[0070] Among them, the first preset time length is shorter than the second preset time length.

[0071] Optionally, after determining the pending berth for the current vehicle, the system uses the Bluetooth device in the field to continuously read the MAC addresses of all Bluetooth devices to ensure that the changes in the status of Bluetooth devices can be captured in real time, especially Bluetooth devices related to the vehicle, such as the vehicle-mounted Bluetooth or the driver's mobile phone Bluetooth. The system will monitor the collection of Bluetooth device MAC addresses. When it is found that any Bluetooth device MAC address is reduced in the collection, further judgment will be made. The key to the present invention is to identify whether the reduced Bluetooth device MAC address is related to the current vehicle. If the MAC address of the vehicle-mounted Bluetooth device is reduced, it usually means that the vehicle has been turned off and the vehicle-mounted Bluetooth is turned off. At the same time, the system will continuously monitor 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 duration. If the duration exceeds the second preset duration, such as 15 minutes, the system deems that the vehicle has been stably parked in the berth for a period of time, and then accurately determines it as the target berth for the current vehicle. The present invention can more accurately determine whether the vehicle has been stably parked in a certain berth by continuously monitoring the changes in the MAC address of the Bluetooth device and the reading status of the electronic tag, 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 misidentification.

[0073] Optionally, the first preset time should be shorter than the second preset time, that is, the time used to trigger uploading the scanning results to the license plate number database should be shorter 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 initial parking information of the vehicle, 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 a target berth for the current vehicle includes:

[0075] Determine, according to the Bluetooth device MAC address of the current vehicle, a Bluetooth device MAC address of at least one driver in the set where the at least two Bluetooth device MAC addresses are located;

[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 pending parking space is determined to be the target parking space of 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 at least one driver's Bluetooth device 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, and the signal strength of the Bluetooth signal corresponding to the identified driver's Bluetooth device MAC address is continuously monitored. If the driver will gradually move 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 is gradually decreasing, 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, the system will 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] When 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] Determine the parking time of the current vehicle in the parking space according to the current time and the parking time;

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

[0083] Optionally, when the duration of the unreadable electronic tag on any berth in the parking lot exceeds the first preset time, this usually means that a vehicle is parked in the berth, because the electronic tag will be blocked and cannot be read when a vehicle is parked. At this time, the system will record the parking time of the current vehicle. This parking time is the time point when the vehicle starts to park, and is the basis for the subsequent calculation of the parking time. The system will calculate the parking time of the current vehicle in the berth according to the recorded parking time and the current time. This parking time is the length of time from the vehicle being parked to the current time, which reflects the length of time the vehicle is parked. If the calculated parking time exceeds the third preset time, the third preset time may be set according to the regulations of the parking lot, such as the maximum allowed parking time, the system will mark the berth and generate an indication instruction, which is used to notify the owner or driver of the current vehicle that their vehicle has been parked for more than the allowed time and needs to leave as soon as possible. Marking the berth may be achieved by changing the berth status, marking in the system, etc., and the indication instruction may be sent to the owner or driver through SMS, APP push, on-site display screen, etc.

[0084] The present invention can help parking lot managers monitor and manage vehicle parking conditions more effectively by automatically recording the parking time of vehicles and calculating the parking duration, thereby reducing the need for manual monitoring and improving management efficiency. At the same time, the functions of marking parking spaces and generating instruction instructions further simplify the management process, allowing managers to respond and handle vehicles that have been parked for too long more quickly, optimizing the use of parking resources, improving the turnover rate of parking lots, and enabling more car owners 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 parking position of the vehicle based on the stored information and displays it on the parking lot map. The owner can find the parking position of the vehicle 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 license plate number of the current vehicle and the parking space position will be stored in a preset car search system. This correspondence is the basis for the operation of the car 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 a target license plate number input by the user in a preset vehicle search interface;

[0092] In response to the vehicle search instruction, a target parking space position of a 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 a preset car search interface, and the system receives the 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 space position has been stored before, the system can quickly find the parking space position that matches the target license plate number and return it to the user as the target parking space 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 a user, wherein the second vehicle search instruction is used to instruct a vehicle search path for determining the target parking space location according to a current query location of the user;

[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 position and the target parking space position;

[0097] The current query location is determined based on the current location 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 searched the target parking space of the vehicle corresponding to the target license plate number through the first car search instruction, the user may want to further obtain the car search path from the current position 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 position. After receiving the second car search instruction, the system will generate a car search path in the preset electronic map of the preset car search system based on the user's current query position 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 position, which may be calculated based on factors such as distance, time, and road conditions. The user's current query position 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 position of the QR code corresponding to the preset car search interface generated by the user scanning. This QR code may be posted in a conspicuous position in the parking lot. The user can open the preset car search interface by scanning the QR code and automatically use the scanned position as the current query position. 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 realizing reverse car search in a parking lot without relying on a parking space camera. By utilizing the characteristics that both the vehicle computer and the driver's mobile phone are equipped with Bluetooth devices (WIFI, Bluetooth) when entering the parking lot, the vehicle-mounted Bluetooth device and the driver's mobile phone are scanned to obtain the device number, and the screened Bluetooth device MAC address is used as the vehicle identity auxiliary identification mark, and an innovative strategy of using the Bluetooth electronic tag in reverse is proposed, that is, reading the electronic tag information is normal, and failure to read the electronic tag information indicates that the vehicle parking scene has occurred, which greatly improves the accuracy of car search. Compared with other solutions that use a wireless device scanning device to scan the device numbers of the vehicle computer and the driver's mobile phone in the parking lot to obtain the parking position, the present invention utilizes the increase and decrease of the device number to screen the wireless signal data carried by passing vehicles, pedestrians, and drivers when walking, which not only greatly reduces the investment in car search services, but is also more accurate than other car search solutions, breaking the dependence on the use of parking space cameras if you want to realize car search services.

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

[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 a 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 a normally open state, which 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 background of the vehicle search system.

[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 software process in the system also includes: using the unreadable time of the Bluetooth electronic tag to infer the parking time of the vehicle. The data analysis system, based on the premise of not obtaining the Bluetooth tag information, screens out the Bluetooth device scanning results of passing vehicles, pedestrians, and drivers, ensuring the directionality of the business goal of finding the vehicle parking location. The entry evidence collection system screens out the Bluetooth device scanning results of other devices at the entrance that are not related to the vehicle entry scene by adding a shielding cover, etc., ensuring the effectiveness of the implementation of the technical solution of the present invention.

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

[0106] Establish a car search system; install Bluetooth scanning devices at the entrance of the parking lot; install Bluetooth device scanning devices in the parking lot; place Bluetooth electronic tags at the parking spaces; draw a parking lot map and associate the locations of the installed Bluetooth device scanning devices 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 number of the smart car machine and the driver's mobile phone is recorded by the Bluetooth device scanning device; the device number is transmitted to the system background and associated with the license plate number;

[0108] When a vehicle is parked 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 scanning device, and the scanned device number is transmitted to the system background. At the same time, the Bluetooth scanning device loses connection with the electronic tag, and it is determined that there is a vehicle parked in the parking space;

[0109] The system starts to compare. If it finds that two device numbers in the Bluetooth device scanning result are the same as the Bluetooth device numbers in a certain entry record, the license plate number in the entry record of this scanning result will be associated, and the location of the electronic tag will be determined as the suspected parking location; the system continues to collect the scanning results of the Bluetooth devices in the parking lot. When it is found that a single Bluetooth device appearing 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 the driver's mobile phone and is in a walking state. The suspected parking location is determined as the parking location, and the scanned points are connected on the parking lot map to draw a trajectory map and mark the parking location;

[0110] When the car owner needs to know the parking location of the vehicle, he can log in to the QR code website placed in the yard to scan the code and enter the license plate number. After receiving the query request, the system searches the database for the trajectory map corresponding to the license plate number, presents the parking space range corresponding to the Bluetooth electronic tag in the parking location to the car seeker, and calls the indoor map to display the three-dimensional coordinates of the parking space. The car seeker can use this to navigate indoors or find the vehicle by visually searching for the parking space number. This method can enable the car owner to search for the parking location of the vehicle by license plate number without installing a license plate recognition camera and a vehicle inspection system on the parking space in the yard.

[0111] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0112] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for 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 some 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 embodiments of the present invention.

Claims

1. A method for realizing reverse car search in a parking lot without relying on parking space cameras, characterized in that: include: Identify at least two Bluetooth device MAC addresses corresponding to the current vehicle and a license plate number corresponding to the current vehicle in a preset area of ​​the entryway, wherein the at least two Bluetooth device MAC addresses include a Bluetooth device MAC address of the current vehicle and a 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 length, all scanning results obtained by the Bluetooth device in the parking lot corresponding to the electronic tag within the first preset time length 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 in the parking lot when there is no vehicle in the parking lot. When there is a vehicle in the parking lot, 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 in the parking spaces and the drivers, 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 number database, the berth is determined to be a pending berth for the current vehicle; if any Bluetooth device MAC address is reduced in 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 a 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 a parking space camera 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 in each parking lot within the preset range; Adjust the transmission power of the Bluetooth device in the field, and use a metal shielding cover 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, and test the placement position 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 length, determining the pending berth as the target berth of the current vehicle includes: After determining the pending berth for the current vehicle, continuously reading the MAC addresses of all Bluetooth devices using the Bluetooth device in the field; In the case of determining that any Bluetooth device MAC address is reduced from the set of the at least two Bluetooth device MAC addresses, determining that the reduced Bluetooth device MAC address is 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 length, determining the pending berth as the target berth for the current vehicle; Among them, the first preset time length is shorter than the second preset time length.

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 step of determining the pending berth as the target berth for the current vehicle includes: Determine, according to the Bluetooth device MAC address of the current vehicle, a Bluetooth device MAC address of at least one driver in the set where the at least two Bluetooth device MAC addresses are located; 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 pending parking space is determined to be the target parking space of 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: When 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; Determine the parking time of the current vehicle in the parking space according to the current time and the parking time; In the case that the parking time exceeds a third preset time, the parking space is marked and an indication instruction is generated, wherein the indication 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 corresponding relationship 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 a target license plate number input by the user in a preset vehicle search interface; In response to the vehicle search instruction, a target parking space position of a 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 a user, wherein the second vehicle search instruction is used to instruct a vehicle search path for determining the target parking space location according to a current query location of the user; 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 position and the target parking space position; The current query location is determined based on the current location 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 realizing reverse car search in a parking lot without relying on a parking space camera, using the method for realizing reverse car search in a parking lot without relying on a parking space camera as claimed in any one of claims 1 to 9, characterized in that: It includes a control unit, an entrance Bluetooth device and a license plate recognition camera installed at the entrance channel, all Bluetooth devices installed in the parking lot, and an electronic tag installed on each parking space within the coverage range of each Bluetooth device in the parking lot; The control unit is communicatively connected with the entrance Bluetooth device, the license plate recognition camera at the parking lot entrance, and all the Bluetooth devices in the parking lot.

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