CN109345821B - Bluetooth beacon electronic fence parking control method, device and system and vehicle - Google Patents
Bluetooth beacon electronic fence parking control method, device and system and vehicle Download PDFInfo
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- CN109345821B CN109345821B CN201811374355.1A CN201811374355A CN109345821B CN 109345821 B CN109345821 B CN 109345821B CN 201811374355 A CN201811374355 A CN 201811374355A CN 109345821 B CN109345821 B CN 109345821B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/20—Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles
- G08G1/207—Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles with respect to certain areas, e.g. forbidden or allowed areas with possible alerting when inside or outside boundaries
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F17/00—Coin-freed apparatus for hiring articles; Coin-freed facilities or services
- G07F17/0042—Coin-freed apparatus for hiring articles; Coin-freed facilities or services for hiring of objects
- G07F17/0057—Coin-freed apparatus for hiring articles; Coin-freed facilities or services for hiring of objects for the hiring or rent of vehicles, e.g. cars, bicycles or wheelchairs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Abstract
The invention discloses a parking control method, a device and a system of a Bluetooth beacon electronic fence and a vehicle, wherein the method obtains respective inter-beacon reference strength by mutually scanning a plurality of Bluetooth beacons in a parking area, and the inter-beacon reference strength is contained in reference data and is broadcasted outwards; the parking control device on the vehicle judges whether the vehicle is positioned in the parking area or not by detecting the reference data sent by each Bluetooth beacon and the strength of the Bluetooth signal. The invention has the advantages that: through mutual scanning between the bluetooth beacons, the random influence of environmental factors on the strength of the bluetooth signals can be eliminated, so that the bluetooth signals can be used for accurately positioning the vehicle, and the parking behavior of a user is effectively supervised.
Description
Technical Field
The invention relates to the technical field of internet, in particular to a parking control method, device and system for a Bluetooth beacon electronic fence and a vehicle.
Background
With the development of internet technology, shared bicycles raised in various large and medium-sized cities in China are almost visible everywhere, compared with public bicycles with piles, the shared bicycle without piles for taking and parking at any time brings great convenience to users, but also causes the phenomenon of 'random parking and random parking' of the shared bicycles, particularly the phenomenon of random parking at subway exits with concentrated pedestrian flow is very serious, and even the phenomenon of 'dangerous parking' at motorways, blind roads and the like is also rare, so that the management of urban space is very difficult.
In order to solve the phenomenon of 'disorder parking and disorder placing' of the shared bicycle, a city manager begins to intensively demarcate bicycle parking areas at subway exits, bus stations and other people streams to guide users to park the shared bicycle in a designated area. In the practical implementation process, whether the shared bicycle can be parked in the designated area or not is determined by the user; in addition, even if the user does not park the shared bicycle in a designated area, the user cannot be punished or warned. Therefore, the phenomenon of 'random parking and random parking' of the shared bicycle is still very common.
For the Internet 'pile-free' shared bicycle, the electronic fence technical specification is adopted for parking by users, and the electronic fence parking method is a main technical means adopted by operators of large shared bicycles at present and is also a technical means recommended by a city appearance manager in cities. At present, two main means are used for realizing the electronic fence, namely, a satellite positioning technology (such as a Beidou satellite positioning system or a GPS) is adopted, and a geographic information is managed by combining an electronic map to realize the electronic fence; and secondly, a low-power signal transmitting device (such as a Bluetooth low-power base station) is adopted to mark the electronic fence parking area. In the two means, the two main problems of the former method are that the satellite positioning precision and the influence of environmental shielding on satellite signal receiving influence the positioning precision, usually the error range reaches 10-15m, the left side and the right side of a road can not be basically judged, and a blind road, a grassland and a pedestrian road are improved; the latter has a major problem that the influence of weather such as rain and snow on wireless signals is large, so that the intensity of a Bluetooth signal received by a wireless signal receiving device of the electronic lock is influenced, the judgment of an electronic fence area is deviated, the judgment of whether a bicycle stops in a parking area is not accurate, the error range reaches 5-10m, and a rectangular fence cannot be realized.
Under the ideal condition, the intensity of the Bluetooth signal is reduced along with the increase of the propagation distance, and by utilizing the property, a plurality of Bluetooth beacons can be arranged to locate the shared bicycle with the Bluetooth transceiving function. However, bluetooth signal strength is affected by the degree factors of the transmitting device, the receiving device, obstacles, weather, distance, etc. The fixed receiving device and transmitting device positions, the intensity of the Bluetooth signal changes with the change of the environmental factors. Multipath effects can result in a higher signal strength for bluetooth with an obstruction than without. In rainy weather, the strength of the bluetooth signal may drop slightly due to the increased humidity in the air. It is difficult to locate the shared bicycle directly by the strength of the bluetooth signal.
Disclosure of Invention
The invention aims to provide a parking control method, a parking control device, a parking control system and a parking control vehicle for a Bluetooth beacon electronic fence according to the defects of the prior art.
The purpose of the invention is realized by the following technical scheme:
a parking control method for a Bluetooth beacon electronic fence comprises the following steps:
(1) detecting the reference data and the Bluetooth signal intensity of the Bluetooth beacon broadcasting outwards in the parking area in an unlocking state; responding to the vehicle locking signal, and continuously detecting the reference data and the Bluetooth signal intensity of the outward broadcast of the Bluetooth beacon in the parking area within the set time;
wherein the reference data broadcasted by each bluetooth beacon includes respective inter-beacon reference strength;
(2) determining a reference intensity and a threshold value according to the detection result;
(3) comparing the detected Bluetooth signal intensity with the threshold value to determine the number of effective Bluetooth beacons;
(4) and judging whether the vehicle is parked in the parking area or not according to the number of the effective Bluetooth beacons, if so, successfully locking the vehicle, and if not, unsuccessfully locking the vehicle, and prompting a user to standardize parking.
The invention is further improved in that a plurality of Bluetooth beacons are arranged in the parking area; and each Bluetooth beacon scans the Bluetooth signal intensity of other Bluetooth beacons which are broadcasted outwards every other preset period, and updates the reference intensity between beacons according to the scanning result, wherein the updated reference intensity between beacons is broadcasted outwards in the next preset period.
A further refinement of the invention is that the inter-beacon reference strength of each bluetooth beacon is determined by:
(1) each Bluetooth beacon scans the Bluetooth signal intensity broadcast by other Bluetooth beacons for multiple times at intervals of a preset period;
(2) recording the scanned strongest Bluetooth signal intensity after each scanning is finished, and forming a strongest Bluetooth signal intensity set after multiple times of scanning is finished;
(3) and selecting a median in the strongest Bluetooth signal strength set as the inter-beacon reference strength of the Bluetooth beacon, and broadcasting outwards in the next preset period.
The invention is further improved in that in the process of determining the reference strength, the reference strength between beacons broadcasted by the bluetooth beacon with the highest bluetooth signal strength is used as the reference strength.
A further development of the invention is that the process of determining the reference strength comprises the following steps:
(1) taking the inter-beacon reference strength of the Bluetooth beacon with the maximum Bluetooth signal strength detected before responding to the car locking signal as the preset reference strength;
(2) taking the inter-beacon reference intensity of the Bluetooth beacon with the maximum Bluetooth signal intensity detected within the set time as the post-set reference intensity;
(3) and taking the post-set reference intensity, the pre-set reference intensity or a reference intensity default value as the reference intensity.
A further development of the invention is that, in the course of detecting a bluetooth beacon, reference data of the detected bluetooth beacon are stored together with the bluetooth signal strength.
The invention is further improved in that before responding to the vehicle locking signal, the reference data of the detected Bluetooth beacon and the Bluetooth signal strength are stored in the preset set; before responding to the car locking signal, when the reference data of a certain Bluetooth beacon and the Bluetooth signal strength are detected,
if the record of the Bluetooth beacon does not exist in the preset set and the number of the records in the preset set is less than the preset number, storing the reference data of the Bluetooth beacon and the Bluetooth signal intensity in the preset set;
if the record of the Bluetooth beacon exists in the preset set, replacing the existing record of the Bluetooth beacon in the preset set with the reference data and the Bluetooth signal intensity of the Bluetooth beacon;
and if the record of the Bluetooth beacon does not exist in the preset set and the number of the records in the preset set is greater than or equal to the preset number, replacing the record of the Bluetooth beacon with the earliest storage time in the preset set by using the reference data of the Bluetooth beacon and the Bluetooth signal strength.
A further improvement of the invention is that during the set time, reference data of the detected bluetooth beacon and the bluetooth signal strength are stored in a post-set; when the reference data of a certain Bluetooth beacon and the Bluetooth signal strength are detected in the set time,
if the Bluetooth beacon does not exist in the post-set and the number of records in the post-set is less than the post-set number, storing the reference data of the Bluetooth beacon and the Bluetooth signal intensity in the post-set;
if the Bluetooth beacon is detected more than twice within the set time, calculating the average value of the Bluetooth signal intensity of the Bluetooth beacon, and replacing the average value of the Bluetooth signal intensity as the Bluetooth signal intensity together with the reference data to set the existing record of the Bluetooth beacon in the set;
and if the post-set does not have the records of the Bluetooth beacon, the number of the records in the post-set is greater than or equal to the number of the post-set sets, and the records with the Bluetooth signal intensity smaller than that of the Bluetooth beacon exist in the post-set, replacing the record of the Bluetooth beacon with the minimum Bluetooth signal intensity in the post-set with the reference data and the Bluetooth signal intensity of the Bluetooth beacon.
In a further development of the invention, the threshold value is calculated by the following formula:
Y＝R-X
wherein Y is the threshold, R is the reference intensity, X represents a standard intensity differential value, and X is less than or equal to 40.
The invention has the further improvement that in the process of determining the number of effective Bluetooth beacons, the detected Bluetooth signal intensity of each Bluetooth beacon is sequentially compared with a threshold value, and if the Bluetooth signal intensity is greater than or equal to the threshold value, the Bluetooth beacon corresponding to the Bluetooth signal intensity is judged to be an effective Bluetooth beacon; otherwise, if the Bluetooth signal intensity is smaller than the threshold value, the Bluetooth beacon corresponding to the Bluetooth signal intensity is judged to be an invalid Bluetooth beacon.
The invention is further improved in that in the process of judging whether the vehicle stops in the parking area, the number of the effective Bluetooth beacons is compared with a preset standard K, if the number of the effective Bluetooth beacons is larger than or equal to K, the vehicle is judged to be in the parking area, otherwise, if the number of the effective Bluetooth beacons is smaller than K, the vehicle is judged not to be in the parking area, wherein K is larger than or equal to 1.
The invention is further improved in that the prompt is performed through a lock of the vehicle or a user terminal in the process of prompting the user to standardize the parking.
The invention also relates to a parking control device which is arranged on a vehicle and comprises a vehicle lock, a Bluetooth read-write module, a wireless communication module, a prompt module and a controller, wherein:
the vehicle lock is electrically connected with the controller, and is used for generating a vehicle locking signal and unlocking under the control of the controller;
the Bluetooth read-write module is electrically connected with the controller and is used for detecting the reference data and Bluetooth signal intensity of the Bluetooth beacon broadcast outwards;
the wireless communication module is electrically connected with the controller;
the prompting module is electrically connected with the controller and used for giving out sound or visible light prompts under the control of the controller.
The invention also relates to a parking control system, which comprises the parking control device, a cloud server, a user terminal and a Bluetooth beacon arranged in a parking area; and the cloud server is in communication connection with the parking control device and the user terminal through a wireless network.
The invention also relates to a vehicle comprising the parking control device.
The invention has the advantages that: through mutual scanning among the bluetooth beacons, random influence of environmental factors on the intensity of the bluetooth signals can be eliminated, and the bluetooth signals broadcast outwards by the bluetooth beacons in the electronic fence can be accurately positioned by comprehensively considering the bluetooth scanning results in the on-off lock state and configuring a reasonable standard intensity difference value X according to the scanning results, so that the parking behavior of a user is effectively supervised.
Drawings
FIG. 1 is a schematic diagram of a parking control system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a parking control apparatus according to an embodiment of the present invention.
Description of the symbols:
1 a parking control device, 2 a vehicle, 3 a vehicle lock, 4 a Bluetooth read-write module, 5 a wireless communication module,
a prompt module 6, a controller 7, a Bluetooth beacon 8, a parking area 9, a cloud server 10,
11 user terminal.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
example (b): as shown in fig. 1 and 2, an embodiment of the present invention relates to a parking control apparatus 1. The parking control apparatus 1 is mounted on a vehicle 2. The parking control device 1 comprises a lock 3, a Bluetooth read-write module 4, a wireless communication module 5, a prompt module 6 and a controller 7.
The vehicle lock 3 is electrically connected with the controller 7, and the vehicle lock 3 is used for locking the vehicle 2 and generating a vehicle locking signal when a user locks the vehicle. The lock 3 is unlocked under the control of the controller 7. When the user closes the lock 3, the controller 7 may receive the lock signal sent by the lock 3 and respond to the lock signal. When the user violates the parking regulation, the controller 7 may forcibly open the lock 3 to remind the user to park the vehicle 2 to a region that meets the regulation.
Bluetooth read write module 4 and controller 7 electric connection, bluetooth read write module 4 is used for detecting the outside reference data of broadcasting of bluetooth beacon 8 in the parking area and measures bluetooth signal intensity of bluetooth beacon 8. The reference data and the bluetooth signal strength detected by the bluetooth read-write module 4 can be used to determine whether the vehicle 2 is located inside the parking area, so as to determine whether the user parks correctly. In this embodiment, the controller 7 is a single chip microcomputer.
The wireless communication module 5 is electrically connected with the controller 7; the controller 7 can communicate with the cloud server 10 through the wireless communication module 5. The prompting module 6 is internally provided with a buzzer and an LED lamp, and when a user parks in an illegal way (the vehicle 2 is parked in an area outside the parking area 9), the controller 7 can control the prompting module 6 to give out a sound or visible light prompt.
The embodiment also relates to a parking control system.
As shown in fig. 1 and 2, the parking control system includes a cloud server 10, a user terminal 11, a plurality of parking control devices 1, and a plurality of bluetooth beacons 8 disposed in a parking area 9. The cloud server 10 is in communication connection with the parking control device 1 and the user terminal 11 through a wireless network. The parking control device system can determine whether the vehicle 2 is parked inside the parking area 9 according to the reference data broadcast by each bluetooth beacon 8 in the parking area 9 and the bluetooth signal strength, and if the user parks the vehicle 2 outside the parking area, the parking control device system can send a prompt to the user through the parking control device 1 or the user terminal 11. In this embodiment, the user terminal 11 is a mobile phone.
A plurality of bluetooth beacons 8 are provided within the parking area 9. Each bluetooth beacon 8 scans the bluetooth signal strength broadcast by other bluetooth beacons 8 every other preset period, and updates the inter-beacon reference strength according to the scanning result, and the updated inter-beacon reference strength is broadcast outwards in the next preset period.
Specifically, the parking area 9 is rectangular, and the width of the parking area 9 is 2m and the length thereof is 4 to 10 m. The bluetooth beacons 8 are arranged along the central axis of the parking area 9. The distance between adjacent bluetooth beacons 8 is 1 m.
In this embodiment, each bluetooth beacon 8 broadcasts reference data out every 500 ms. The time interval during which the bluetooth beacon 8 broadcasts the reference data should not be too short in order to reduce the power consumption of the bluetooth beacon. The inter-beacon reference strength of each bluetooth beacon 8 is determined by:
(1) each bluetooth beacon 8 scans the intensity of the bluetooth signals broadcast by other bluetooth beacons 8 for multiple times at intervals of a preset period;
(2) recording the scanned strongest Bluetooth signal intensity after each scanning is finished, and forming a strongest Bluetooth signal intensity set after multiple times of scanning is finished;
(3) the median in the strongest bluetooth signal strength set is selected as the inter-beacon reference strength broadcast by the bluetooth beacon 8 and broadcast outwards in the next preset period.
In this embodiment, the preset period for updating the reference strength between beacons by the bluetooth beacon 8 is 10min, and in each preset period, the interval between two scans of the bluetooth beacon 8 is greater than 3 s. Because each bluetooth beacon 8 is spaced at a certain distance, reference data broadcast by other bluetooth beacons 8 received by each bluetooth beacon 8 will pass through a certain propagation path, and bluetooth signals carrying the reference data will be affected by environmental factors in the propagation process and attenuated or enhanced. Under the condition that the installation position of each bluetooth beacon 8 and the transmission intensity of the bluetooth signal are fixed, the inter-beacon reference intensity obtained by each bluetooth beacon 8 can reflect the environmental conditions around the corresponding bluetooth beacon, such as the density of vehicles and other factors.
The reference data broadcast out by each bluetooth beacon 8 also includes the name and serial number of the bluetooth beacon.
The embodiment also relates to a vehicle.
As shown in fig. 1 and 2, a parking control apparatus 1 according to the present embodiment is mounted on a vehicle 2. The vehicle 2 may be a bicycle, a tricycle, an electric vehicle, or the like. In the present embodiment, the vehicle 2 is a shared bicycle.
The embodiment also relates to a parking control method of the Bluetooth beacon electronic fence.
The parking control method of the bluetooth beacon electronic fence in the embodiment performs supervisory control on the parking behavior of the user by using the parking control system, and comprises the following steps:
(1) in the unlocked state, the parking control apparatus 1 on the vehicle 2 detects the reference data and the bluetooth signal strength broadcast to the outside by each bluetooth beacon in the parking area 9, and the reference data broadcast to the outside by each bluetooth beacon 8 includes the respective inter-beacon reference strength.
In this process, the parking control apparatus 1 detects the reference data broadcast by each bluetooth beacon 8 using the bluetooth read/write module 4 and measures the bluetooth signal strength of the corresponding bluetooth beacon 8. A memory is provided in the parking control apparatus 1, and the parking control apparatus 1 can store the reference data detected by the parking control apparatus and the bluetooth signal strength in the memory.
In this embodiment, the parking control apparatus 1 stores each piece of reference data and the corresponding bluetooth signal strength detected before responding to the car locking signal as one record in the preset set of the memory. The preset set is an area in the memory, and since the storage space of the embedded system is usually very limited, in this embodiment, the number of records in the preset set needs to be limited. The number of records in the preset set needs to be smaller than the preset number.
Before responding to the car locking signal, when the parking control device 1 detects the reference data and the bluetooth signal strength of a certain bluetooth beacon 8, the following strategies are adopted to store or replace the reference data and the bluetooth signal strength:
(a) if the bluetooth beacon 8 is not recorded in the preset set and the number of records in the preset set is less than the preset number, storing the reference data of the bluetooth beacon 8 and the bluetooth signal strength as a record in the preset set;
(b) if the record of the bluetooth beacon 8 exists in the preset set, replacing the existing record of the bluetooth beacon in the preset set with the reference data and the bluetooth signal strength of the bluetooth beacon 8;
(c) if there is no record of the bluetooth beacon 8 in the pre-set and the number of records in the pre-set is greater than or equal to the pre-set number, the record of the bluetooth beacon 8 with the earliest storage time in the pre-set is replaced with the reference data of the bluetooth beacon 8 and the bluetooth signal strength.
In the storage replacement strategy, the records of the bluetooth beacons 8 are replaced according to time sequence, and the record of the bluetooth beacon 8 detected earliest in the preset set can be removed in time, so that the records in the preset set can reflect the distribution conditions of the bluetooth beacons 8 around the vehicle 2 in real time.
(2) And responding to the vehicle locking signal, and continuously detecting the reference data and the Bluetooth signal strength which are broadcast outwards by the Bluetooth beacon 8 in the parking area 9 within the set time.
In this embodiment, the lock signal is generated by the lock 3 of the parking control device 1, and when the user performs a lock closing operation on the lock 3, the lock 3 generates the lock signal, and the controller 7 of the parking control device 1 starts to respond to the lock signal.
After the controller 7 of the parking control device 1 responds to the car locking signal, the bluetooth read-write module 4 continues to detect the reference data and the bluetooth signal strength of the outward broadcast of each bluetooth beacon 8 within the set time. In this embodiment, the set time is 5 seconds.
Similarly to before responding to the lock signal, after responding to the lock signal, the parking control apparatus 1 stores each piece of reference data detected within the set time and the corresponding bluetooth signal as one record in the post-set of the memory. The number of postsets is limited to a postset number. When the reference data and the bluetooth signal strength of a certain bluetooth beacon 8 are detected within the set time, the following storage replacement strategy is adopted:
(a) if the bluetooth beacon 8 is not recorded in the post-set and the number of records in the post-set is less than the post-set number, storing the reference data of the bluetooth beacon 8 and the bluetooth signal strength in the post-set;
(b) if the Bluetooth beacon 8 is detected more than twice within the set time, calculating the average value of the Bluetooth signal intensity of the Bluetooth beacon 8, and replacing the average value of the Bluetooth signal intensity as the Bluetooth signal intensity together with the reference data to set the existing record of the Bluetooth beacon in the set; in order to facilitate the calculation of the average value of the bluetooth signal strength, in this embodiment, each record in the post-set includes a detection number field;
(c) and if the record of the Bluetooth beacon 8 does not exist in the post-set, the number of the records in the post-set is greater than or equal to the number of the post-set sets, and the record of which the Bluetooth signal intensity is less than that of the Bluetooth beacon 8 exists in the post-set, replacing the record of the Bluetooth beacon 8 with the minimum Bluetooth signal intensity in the post-set with the reference data and the Bluetooth signal intensity of the Bluetooth beacon 8.
In the storage replacement strategy, the records of the bluetooth beacon 8 are replaced according to the bluetooth signal strength, and the records of the bluetooth beacon 8 with the weakest bluetooth signal strength in the preset set can be removed in time. Because the intensity of the bluetooth signal is weakened along with the increase of the distance between the bluetooth beacon 8 and the parking control device 1, the record with the weakest intensity of the bluetooth signal is removed in time, and the record in the preset set can reflect the distribution condition of the nearest bluetooth beacon 8 around the vehicle.
(3) After the set time is over, the parking control apparatus 1 determines the reference intensity R and the threshold value Y based on the detection result, and determines the number of effective bluetooth beacons 8 based on the threshold value Y and the detection result.
Specifically, in the process of determining the reference intensity R, the inter-beacon reference intensity in the reference data broadcast by the bluetooth beacon 8 having the highest bluetooth signal intensity detected by the parking control apparatus 1 is set as the reference intensity R.
However, the parking control apparatus 1 may be in a moving state before responding to the lock signal, and therefore the bluetooth beacon 8 detected by the parking control apparatus 1 before responding to the lock signal may not be around the vehicle 2 after responding to the lock signal. In order to improve the detection accuracy, the reference intensity R may be determined as follows:
(3.1) using the inter-beacon reference strength of the bluetooth beacon 8 with the maximum bluetooth signal strength detected before responding to the car locking signal as the preset reference strength; responding to the reference data of the Bluetooth beacon 8 detected before the vehicle locking signal and the Bluetooth signal strength as records stored in the preset set;
(3.2) using the inter-beacon reference strength of the bluetooth beacon 8 with the maximum bluetooth signal strength detected within the set time as the post-set reference strength; setting the reference data of the detected Bluetooth beacon 8 and the Bluetooth signal intensity in time as records stored in a post-set;
(3.3) if the calculation of the later reference strength is not abnormal, taking the later reference strength as the reference strength R; if the calculation of the later reference intensity is abnormal and the calculation of the former reference intensity is not abnormal, the former reference intensity is taken as the reference intensity R; and if the preset reference intensity and the rear reference intensity are abnormal, taking the default value of the reference intensity as the reference intensity R. In this embodiment, the reference intensity default is-50. The abnormality here refers to a problem that the parking control apparatus 1 does not detect a bluetooth beacon or that the detected value is out of the normal range, or the like.
The process of determining the threshold Y requires the participation of the cloud server 10; in the process of determining the threshold Y, the parking control device 1 reports the reference intensity R to the cloud server 10 through the wireless communication module 5, and the cloud server 10 calculates the threshold Y and then sends the threshold Y to the parking control device 1. The cloud server 10 calculates the threshold Y by the following formula:
Y＝R-X
wherein Y is the threshold, R is the reference intensity, X represents a standard intensity differential value, and X is less than or equal to 40. The standard intensity difference value X is a statistical value obtained by performing statistics after comprehensively considering the influence degrees of different factors such as the transmission frequency, the transmission power, the distance between the bluetooth beacons 2, the positioning accuracy, and the density of the positioning targets 6 in the positioning area, and the statistical value can be stored in the cloud server, and is matched with different X values according to the reference intensity R determined by the positioning targets 6, so as to calculate the positioning threshold Y.
After receiving the threshold value Y, the parking control apparatus 1 counts the number of effective bluetooth beacons according to the records in the pre-set and the post-set. In the process of determining the number of effective bluetooth beacons, the parking control device 1 compares the detected bluetooth signal intensity of each bluetooth beacon 8 with a threshold value Y in sequence, and if the bluetooth signal intensity is greater than or equal to the threshold value Y, the bluetooth beacon 8 corresponding to the bluetooth signal intensity is judged to be an effective bluetooth beacon; otherwise, if the bluetooth signal strength is smaller than the threshold Y, it is determined that the bluetooth beacon 8 corresponding to the bluetooth signal strength is an invalid bluetooth beacon.
The position relationship between the vehicle 2 corresponding to the parking control device 1 and the parking area 9 can be judged from the number of the effective bluetooth beacons, and the parking control device 1 of the vehicle 2 can detect a plurality of effective bluetooth beacons only when the vehicle 2 is located in the parking area 9.
(4) And judging whether the vehicle 2 is parked in the parking area or not according to the number of the effective Bluetooth beacons, if so, successfully locking the vehicle, and if not, unsuccessfully locking the vehicle, and prompting a user to standardize parking.
Specifically, in the process of determining whether the vehicle is parked in the parking area, the parking control device 1 compares the number of the effective bluetooth beacons with a preset standard K, and determines that the vehicle 2 is in the parking area 9 if the number of the effective bluetooth beacons is greater than or equal to K, or otherwise determines that the vehicle 2 is not in the parking area 9 if the number of the effective bluetooth beacons is less than K. In this embodiment, the predetermined criterion K is 2.
After the judgment is finished, the parking control device 1 reports the judgment result to the cloud server, and if the vehicle 2 is in the parking area 9, the cloud server 10 stops charging. On the other hand, if the vehicle 2 is not in the predetermined parking area 9, the cloud server 10 issues a presentation instruction to the parking control apparatus 1 or/and the user terminal 11. After the parking control device 1 receives the prompt instruction, the parking control device 1 springs the lock of the vehicle, and sends an audible and visual prompt signal to the user through the prompt module 6 of the parking control device 1 so as to prompt the user to standardize parking.
The above embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A parking control method for a Bluetooth beacon electronic fence comprises the following steps:
(1) detecting the reference data and the Bluetooth signal intensity of the Bluetooth beacon broadcasting outwards in the parking area in an unlocking state; responding to the vehicle locking signal, and continuously detecting the reference data and the Bluetooth signal intensity of the outward broadcast of the Bluetooth beacon in the parking area within the set time;
wherein the reference data broadcasted by each bluetooth beacon includes respective inter-beacon reference strength; the inter-beacon reference strength is determined by the Bluetooth beacon according to the strength of the strongest Bluetooth signal broadcasted by other scanned Bluetooth beacons;
(2) determining a reference intensity according to the detection result, and determining a threshold value according to the reference intensity; wherein, the reference strength is the inter-beacon reference strength broadcasted by the bluetooth beacon with the maximum detected bluetooth signal strength;
(3) comparing the detected Bluetooth signal intensity with the threshold value to determine the number of effective Bluetooth beacons;
(4) and judging whether the vehicle is parked in the parking area or not according to the number of the effective Bluetooth beacons, if so, successfully locking the vehicle, and if not, unsuccessfully locking the vehicle, and prompting a user to standardize parking.
2. The method as claimed in claim 1, wherein the reference strength is determined by using the inter-beacon reference strength broadcast by the bluetooth beacon having the highest bluetooth signal strength.
3. The Bluetooth beacon electronic fence parking control method of claim 1,
the process of determining the reference strength comprises the steps of:
(1) taking the inter-beacon reference strength of the Bluetooth beacon with the maximum Bluetooth signal strength detected before responding to the car locking signal as the preset reference strength;
(2) taking the inter-beacon reference intensity of the Bluetooth beacon with the maximum Bluetooth signal intensity detected within the set time as the post-set reference intensity;
(3) and taking the post-set reference intensity, the pre-set reference intensity or a reference intensity default value as the reference intensity.
4. The method of claim 3, wherein the reference data of the detected Bluetooth beacon and the strength of the Bluetooth signal are stored in a preset set before responding to the car locking signal; before responding to the car locking signal, when the reference data of a certain Bluetooth beacon and the Bluetooth signal strength are detected,
if the record of the Bluetooth beacon does not exist in the preset set and the number of the records in the preset set is less than the preset number, storing the reference data of the Bluetooth beacon and the Bluetooth signal intensity in the preset set;
if the record of the Bluetooth beacon exists in the preset set, replacing the existing record of the Bluetooth beacon in the preset set with the reference data and the Bluetooth signal intensity of the Bluetooth beacon;
and if the record of the Bluetooth beacon does not exist in the preset set and the number of the records in the preset set is greater than or equal to the preset number, replacing the record of the Bluetooth beacon with the earliest storage time in the preset set by using the reference data of the Bluetooth beacon and the Bluetooth signal strength.
5. The method of claim 3, wherein the reference data of the detected Bluetooth beacon and the strength of the Bluetooth signal are stored in a post-set during the set time; when the reference data of a certain Bluetooth beacon and the Bluetooth signal strength are detected in the set time,
if the Bluetooth beacon does not exist in the post-set and the number of records in the post-set is less than the post-set number, storing the reference data of the Bluetooth beacon and the Bluetooth signal intensity in the post-set;
if the Bluetooth beacon is detected more than twice within the set time, calculating the average value of the Bluetooth signal intensity of the Bluetooth beacon, and replacing the average value of the Bluetooth signal intensity as the Bluetooth signal intensity together with the reference data to set the existing record of the Bluetooth beacon in the set;
and if the post-set does not have the records of the Bluetooth beacon, the number of the records in the post-set is greater than or equal to the number of the post-set sets, and the records with the Bluetooth signal intensity smaller than that of the Bluetooth beacon exist in the post-set, replacing the record of the Bluetooth beacon with the minimum Bluetooth signal intensity in the post-set with the reference data and the Bluetooth signal intensity of the Bluetooth beacon.
6. The method for controlling parking in an electronic fence according to any of claims 1-5, wherein the threshold is calculated by the following formula:
Y＝R-X
wherein Y is the threshold, R is the reference intensity, X represents a standard intensity differential value, and X is less than or equal to 40.
7. The parking control method for the Bluetooth beacon electronic fence according to claim 1, wherein in the process of determining the number of effective Bluetooth beacons, the detected Bluetooth signal intensity of each Bluetooth beacon is sequentially compared with a threshold, and if the Bluetooth signal intensity is greater than or equal to the threshold, the Bluetooth beacon corresponding to the Bluetooth signal intensity is determined to be an effective Bluetooth beacon; otherwise, if the Bluetooth signal intensity is smaller than the threshold value, the Bluetooth beacon corresponding to the Bluetooth signal intensity is judged to be an invalid Bluetooth beacon.
8. The parking control method of claim 1 or 7, wherein in the process of determining whether the vehicle is parked in the parking area, the number of effective bluetooth beacons is compared with a preset standard K, if the number of effective bluetooth beacons is greater than or equal to K, the vehicle is determined to be in the parking area, otherwise, if the number of effective bluetooth beacons is less than K, the vehicle is determined not to be in the parking area, wherein K is greater than or equal to 1.
9. The parking control method of claim 1, wherein the prompting is performed by a lock of the vehicle or a user terminal during the process of prompting the user to specify the parking.
10. The utility model provides a parking control device installs on the vehicle, its characterized in that, includes lock, bluetooth read and write module, wireless communication module and controller, wherein: the parking control device executing the bluetooth beacon electronic fence parking control method of any one of claims 1-9;
the vehicle lock is electrically connected with the controller, and is used for generating a vehicle locking signal and unlocking under the control of the controller;
the Bluetooth read-write module is electrically connected with the controller and is used for detecting the reference data and Bluetooth signal intensity of the Bluetooth beacon broadcast outwards;
the wireless communication module is electrically connected with the controller.
11. A parking control system relating to the parking control apparatus of claim 10, characterized by comprising the parking control apparatus, a cloud server, a user terminal, and a bluetooth beacon provided inside a parking area; and the cloud server is in communication connection with the parking control device and the user terminal through a wireless network.
12. A vehicle characterized by comprising the parking control apparatus according to claim 10.
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| CN201811374355.1A CN109345821B (en) | 2018-11-19 | 2018-11-19 | Bluetooth beacon electronic fence parking control method, device and system and vehicle |
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