CN109727475A

CN109727475A - Vehicle lookup method, device and communication equipment based on parking lot

Info

Publication number: CN109727475A
Application number: CN201711022306.7A
Authority: CN
Inventors: 徐邦振
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Hangzhou Information Technology Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Hangzhou Information Technology Co Ltd
Priority date: 2017-10-27
Filing date: 2017-10-27
Publication date: 2019-05-07

Abstract

The invention discloses a kind of vehicle lookup method, device and communication equipment based on parking lot, the described method includes: after the vehicle search request for receiving client transmission, according to the corresponding relationship between the vehicle identification information of storage and the identification information of label to be positioned, the corresponding label to be positioned of vehicle identification information carried in request is determined；The signal strength for the reference location label determined respectively according at least one RF reader and the signal strength of label to be positioned, successively determine the Euclidean distance between label to be positioned and reference location label by the sequence of level from high to low according to preset rules；Using the location information of the reference location label of Euclidean distance and lowest hierarchical level between the reference location label and label to be positioned of the lowest hierarchical level determined, the location information of label to be positioned is determined；The response results for carrying the location information of label to be positioned are sent to the client.Using the above method, vehicle position can be quickly found in parking lot.

Description

Vehicle lookup method, device and communication equipment based on parking lot

Technical field

The present invention relates to field of communication technology more particularly to a kind of vehicle lookup method based on parking lot, device and lead to Believe equipment.

Background technique

In January, 2017, Traffic Administration Bureau, Ministry of Public Security publication data show that Chinese motor vehicle total amount reaches 2.9 hundred million, wherein automobile 1.94 hundred million.At the same time, government is " parking difficulty " problem that cracks, and tissue builds a large amount of stereo garages, underground garage and parking Synthesis etc., and the scale of construction is increasing.For example, 2017, the newly-built reed marshes park underground public parking garage area in Hangzhou reaches To 23534 square metres, more than 600 parking stalls are provided with, the parking stall of some solid parking lab settings is even more.In substantial amounts Vehicle position is positioned in parking stall rapidly, convenience can not only be provided for car owner, and can be improved the efficiency of management in parking lot.

There are many implementations for the existing vehicle location scheme based on parking lot.For example, on each parking stall in parking lot Two dimensional code is set, and in car owner after any parking stall parking, the corresponding two dimensional code in the active scan berth is simultaneously uploaded to server Side, server end bind owner information and two-dimensional barcode information.When seeking vehicle, car owner can be obtained corresponding by smart phone inquiry Vehicle position information.In addition, in each parking stall setting information reading device, such as RFID (Radio Frequency Identification, radio frequency identification) card reader and fingerprint capturer etc., it swipes the card after car owner's parking and binds vehicle and parking stall, It is subsequent can be by mobile terminal enquiry to vehicle position when seeking vehicle.Or multiple video cameras are set in parking lot, Vehicle records vehicle license plate information when entering parking lot, and holding tracks to vehicle and moors into parking stall, records vehicle location, then i.e. Terminal inquiry vehicle position information can be passed through.

In existing vehicle location scheme, setting information reading device or two dimensional code on each parking stall, this mode Need car owner it is on the berth enter parking stall after actively carry out " binding " operation, improve using threshold, in addition, fingerprint is arranged on each berth Collector, risk that is not only at high cost but also there is leakage user fingerprints information.In addition, due to parking garage daylighting generally compared with Difference has birth defect using camera tracking vehicle, and positioning accuracy is poor and asks since dark easily generates erroneous detection missing inspection Topic.

In conclusion how in parking lot under the equipment such as not set fingerprint capturer or two dimensional code, quickly to find vehicle Position is improved positional accuracy and one of is a technical problem to be solved urgently.

Summary of the invention

The embodiment of the present invention provides a kind of vehicle lookup method, device and communication equipment based on parking lot, to stop Vehicle position is quickly found in parking lot and improves positional accuracy, while being solved in the prior art because use is by setting Set the generation for the problems such as information read device searches the leakage of owner information caused by method for vehicles.

In a first aspect, the embodiment of the present invention provides a kind of vehicle lookup method based on parking lot, it is provided in parking lot At least one radio frequency reader and several active reference location labels, wherein at least one described RF reader is used for Acquire the signal strength of the reference location label and label to be positioned；The reference location label has different levels, respectively A reference location label is for identifying different localization regions, under including in the localization region of the reference location label of a upper level The reference location label of one level and the localization region of reference location label；And

The method, comprising:

After the vehicle search request for receiving client transmission, according to the vehicle identification information of storage and label to be positioned Identification information between corresponding relationship, determine the corresponding mark to be positioned of the vehicle identification information carried in the search request Label；And

The signal strength for the reference location label determined respectively according at least one described RF reader and described undetermined The signal strength of position label successively determines the label to be positioned and reference by the sequence of level from high to low according to preset rules Position the Euclidean distance between label；And

Using the Euclidean distance between the reference location label and the label to be positioned of the lowest hierarchical level determined and most The location information of the reference location label of low-level determines the location information of the label to be positioned；

The response results for carrying the location information of the label to be positioned are sent to the client.

Preferably, signal strength and the institute of the reference location label determined respectively according at least one described RF reader The signal strength for stating label to be positioned is successively determined according to preset rules between the label to be positioned and reference location label Euclidean distance, specifically include:

For any level, it is performed both by following procedure:

Determine that each RF is read using at least one described RF reader for any reference location label in the level Read signal strength and composition signal strength vector that device collects the reference location label；

Using at least one described RF reader, determine each RF reader collect the label to be positioned signal it is strong It spends and forms signal strength vector；

According to the signal strength vector of reference location label each in the level determined and the label to be positioned Signal strength vector determines Euclidean distance and composition in the level between each reference location label and the label to be positioned Euclidean distance vector；And

When determining the level not is lowest hierarchical level, determine that Euclidean distance takes in Euclidean distance vector described in the level The corresponding reference location label of minimum value；

Determine that the Euclidean distance is minimized next level that the localization region of corresponding reference location label includes Reference location label；And

The radiant power of at least one RF reader is adjusted, so that after at least one described RF reader is using adjustment Radiant power execute the signal of any reference location label for determining that each RF reader collects next level again Intensity and the signal strength of the label to be positioned, determine in next level each reference location label with it is described to be positioned Euclidean distance and composition Euclidean distance and the determining Euclidean distance between label are minimized corresponding reference location label Localization region next level for including reference location label the step of, until determining the reference location label of lowest hierarchical level With the Euclidean distance between the label to be positioned.

Further, the radiant power for adjusting at least one RF reader, specifically includes:

Determine respectively the Euclidean distance be minimized between corresponding reference location label and each RF reader away from From；And

Radiant power of the reduction apart from nearest RF reader, and increase its in addition to apart from nearest RF reader The radiant power of its RF reader.

Preferably, fixed using the Euclidean distance of the reference location label for the lowest hierarchical level determined and the reference of lowest hierarchical level The location information of position label, determines the location information of the label to be positioned, specifically includes:

According to the Euclidean distance of the reference location label of the lowest hierarchical level, determine each with reference to fixed in the lowest hierarchical level The weighting coefficient of position label；And

Using the weighting coefficient of each reference location label and the location information of each reference location label, institute is determined State the location information of label to be positioned.

Preferably, according to the following equation according to the Euclidean distance of the reference location label of the lowest hierarchical level, determine described in The weighting coefficient of each reference location label in lowest hierarchical level:

Wherein, w_lIndicate the weighting coefficient of first of reference location label in lowest hierarchical level；

D_lIndicate the Euclidean distance in lowest hierarchical level between first of reference location label and the label to be positioned；

L indicates the quantity for the reference location label for including in lowest hierarchical level.

Second aspect, the embodiment of the present invention provide a kind of vehicle lookup device based on parking lot, are provided in parking lot At least one radio frequency reader and several active reference location labels, wherein at least one described RF reader is used for Acquire the signal strength of the reference location label and label to be positioned；The reference location label has different levels, respectively A reference location label is for identifying different localization regions, under including in the localization region of the reference location label of a upper level The reference location label of one level and the localization region of reference location label；And

Described device, comprising:

First determination unit, for receive client transmission vehicle search request after, according to the vehicle mark of storage Know the corresponding relationship between information and the identification information of label to be positioned, determines the vehicles identifications letter carried in the search request Cease corresponding label to be positioned；

Second determination unit, the letter of the reference location label for being determined respectively according at least one described RF reader The signal strength of number intensity and the label to be positioned, successively determine according to preset rules by the sequence of level from high to low described in Euclidean distance between label to be positioned and reference location label；

Third determination unit, for using the reference location label of lowest hierarchical level and the label to be positioned determined it Between Euclidean distance and lowest hierarchical level reference location label location information, determine the location information of the label to be positioned；

Transmission unit, for sending the response results for carrying the location information of the label to be positioned to the client.

Preferably, second determination unit, is specifically used for being directed to any level, is performed both by following procedure: for the layer Any reference location label in grade determines that each RF reader collects the reference using at least one described RF reader Position the signal strength and composition signal strength vector of label；Using at least one described RF reader, determine that each RF is read Device collects the signal strength and composition signal strength vector of the label to be positioned；According to each ginseng in the level determined The signal strength vector of positioning label and the signal strength vector of the label to be positioned are examined, is determined each with reference to fixed in the level Euclidean distance and composition Euclidean distance vector between position label and the label to be positioned；And it is determining the level not When lowest hierarchical level, determine that Euclidean distance is minimized corresponding reference location label in Euclidean distance vector described in the level； Determine that the Euclidean distance is minimized the reference location for next level that the localization region of corresponding reference location label includes Label；And the radiant power of at least one RF reader is adjusted, so that after at least one described RF reader is using adjustment Radiant power execute the signal of any reference location label for determining that each RF reader collects next level again Intensity and the signal strength of the label to be positioned, determine in next level each reference location label with it is described to be positioned Euclidean distance and composition Euclidean distance and the determining Euclidean distance between label are minimized corresponding reference location label Localization region next level for including reference location label the step of, until determining the reference location label of lowest hierarchical level With the Euclidean distance between the label to be positioned.

Further, second determination unit, specifically for determining that it is corresponding that the Euclidean distance is minimized respectively The distance between reference location label and each RF reader；And radiant power apart from nearest RF reader is reduced, and Increase the radiant power of other RF readers in addition to apart from nearest RF reader.

Preferably, the third determination unit, specifically for according to the European of the reference location label of the lowest hierarchical level Distance determines the weighting coefficient of each reference location label in the lowest hierarchical level；And utilize each reference location label Weighting coefficient and each reference location label location information, determine the location information of the label to be positioned.

Preferably, the third determination unit, specifically for fixed according to the reference of the lowest hierarchical level according to the following equation The Euclidean distance of position label, determines the weighting coefficient of each reference location label in the lowest hierarchical level:

The third aspect, the embodiment of the present invention provide a kind of communication equipment, including memory, processor and are stored in described deposit On reservoir and the computer program that can run on the processor；The processor realizes such as the application when executing described program The vehicle lookup method based on parking lot.

Fourth aspect, the embodiment of the present invention provide a kind of computer readable storage medium, are stored thereon with computer program, The step in the vehicle lookup method based on parking lot as described in the present application is realized when the program is executed by processor.

The invention has the advantages that:

Vehicle lookup method, device and communication equipment provided in an embodiment of the present invention based on parking lot is set in parking lot It is equipped at least one radio frequency reader and several active reference location labels, wherein at least one described RF reader For acquiring the signal strength of the reference location label and label to be positioned；The reference location label has different layers Grade, each reference location label is for identifying different localization regions, in the localization region of the reference location label of a upper level The localization region of reference location label and reference location label comprising next level；And in the vehicle for receiving client transmission After search request, according to the corresponding relationship between the vehicle identification information of storage and the identification information of label to be positioned, determine The corresponding label to be positioned of the vehicle identification information carried in the search request；And according at least one described RF reader point The signal strength of the signal strength for the reference location label that do not determine and the label to be positioned presses level according to preset rules Sequence from high to low successively determines the Euclidean distance between the label to be positioned and reference location label；And it utilizes and determines Lowest hierarchical level reference location label and the label to be positioned between Euclidean distance and lowest hierarchical level reference location mark The location information of label determines the location information of the label to be positioned；It is sent to the client and carries the label to be positioned Location information response results.Using the above method, vehicle position can not only be quickly found in parking lot, also Due to using classification localization method, vehicle position information is determined using reference location label, is realized to vehicle in parking lot High accuracy positioning, improve the accuracy of positioning result, while efficiently solving and passing through setting because of use in the prior art Information read device searches the generation of the problems such as leakage of owner information caused by method for vehicles.

Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation Specifically noted structure is achieved and obtained in book, claims and attached drawing.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:

Fig. 1 a is the structural schematic diagram that the vehicle based on parking lot that the embodiment of the present invention one provides searches system；

The distribution schematic diagram of RF reader and reference location label in the parking lot that Fig. 1 b provides for the embodiment of the present invention one；

Fig. 2 a is the vehicle lookup method based on parking lot that the vehicle management platform that the embodiment of the present invention one provides is implemented Flow diagram；

Fig. 2 b successively determines institute by the sequence of level from high to low according to preset rules for what the embodiment of the present invention one provided State the flow diagram of the Euclidean distance between label to be positioned and reference location label；

The process of the radiant power of at least one RF reader described in the adjustment that Fig. 2 c provides for the embodiment of the present invention one is shown It is intended to；

Fig. 2 d is the flow diagram of the location information for the determination label to be positioned that the embodiment of the present invention one provides；

Fig. 3 a is the position of reference location label position and label to be positioned in parking lot provided by Embodiment 2 of the present invention Schematic diagram；

Fig. 3 b is that the process of the vehicle lookup method provided by Embodiment 2 of the present invention based on parking lot shown in Fig. 3 a is shown It is intended to；

Fig. 4 is the structural schematic diagram that the vehicle based on parking lot that the embodiment of the present invention three provides searches device.

Specific embodiment

Vehicle lookup method, device and communication equipment provided in an embodiment of the present invention based on parking lot, to stop Vehicle position is quickly found in and improves positional accuracy, while solving to pass through setting because of use in the prior art Information read device searches the generation of the problems such as leakage of owner information caused by method for vehicles.

Below in conjunction with Figure of description, preferred embodiment of the present invention will be described, it should be understood that described herein Preferred embodiment only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention, and in the absence of conflict, this hair The feature in embodiment and embodiment in bright can be combined with each other.

Embodiment one

As shown in Figure 1a, the structural representation of system is searched for the vehicle based on parking lot that the embodiment of the present invention one provides Figure, comprising: be provided with mobile terminal, vehicle management platform, RF (Radio Frequency, radio frequency) reader battle array of client Column, reference location tag array and label to be positioned, wherein the RF reader array includes at least one RF reader, if It sets in parking lot；And the reference location tag array includes at least one reference location label, is similarly disposed at parking In, it may be assumed that be provided at least one radio frequency reader and several active reference location labels in parking lot, wherein institute At least one RF reader is stated for acquiring the signal strength of the reference location label and label to be positioned；The reference location Label has different levels, and each reference location label is for identifying different localization regions, the reference location of a upper level The localization region of reference location label and reference location label in the localization region of label comprising next level.

When it is implemented, parking car owner is when forgetting position of its vehicle in parking lot, it can be by client to vehicle Management platform sends vehicle search request, and vehicle management platform determines the vehicle pair after receiving vehicle car owner request The label to be positioned answered, and believe to the mark that at least one the RF reader being arranged in parking lot sends label to be positioned respectively Breath, so as to which each level can be collected after at least one described RF reader receives the identification information of bit identification undetermined The signal strength of reference location label, and the signal strength of the label to be positioned is collected, and it is flat to feed back to vehicle management Platform, vehicle management platform successively reduce the range of localization region with this, the reference location label based on lowest hierarchical level with it is described The location information of the reference location label of Euclidean distance and lowest hierarchical level between label to be positioned determines the label to be positioned Location information.It is possible thereby to quickly find vehicle position.

When it is implemented, disposing the reference location of several each RF readers and several according to the actual conditions in parking lot Label, and the location information of each reference location label be it is known, i.e., its coordinate is known.In parking lot RF reader and The distribution schematic diagram of reference location label can refer to shown in Fig. 1 b, r in Fig. 1 b₁~r_nIt is RF reader, constitutes RF reader battle array Column；What a, b, c were indicated is the reference location label of different levels in Fig. 1 b, and level where reference location label a is higher than with reference to fixed Level where the label b of position, is higher than level where reference location label c.There are also the reference location marks of other levels in certain figure Label do not mark out only and, and the localization region of reference location label a is to include 4 square areas, reference location in the figure The localization region of label b is a square area, i.e., the localization region of reference location label a includes reference location label b's Localization region.The reference location label for including in Fig. 1 b constitutes reference label array.D indicates label to be positioned in Fig. 1 b, and stops Vehicle in parking lot corresponds.

It should be noted that pre-determined distance, relative position, quantity and grade in Fig. 1 b between each reference location label Several and RF reader quantity and position can be configured and be adjusted according to the actual environment in parking lot, size.

Specifically, the localization region of each reference location label is good in advance, and in order to distinguish each reference location mark Label, can use the identification information of each reference location label to distinguish.For example, each reference location label can be, but not limited to For the M100 label etc. that RF Code company provides, the RF reader in parking lot be can be, but not limited to as M250 reader etc..By It is produced in M100 label and has different sequence numbers, then can believed sequence number as the mark of each reference location label Breath.In this way, vehicle management platform can safeguard a reference location label position relation table, each reference location is stored in table Position and identification information of the label in parking lot, affiliated level and its localization region.Therefore deduce that the reference location mark The reference location label for next level that the localization region of label includes and its localization region.

The reference location label M100 that the present invention uses, belongs to active label, typical to pass using ASK modulating-coding Defeated range is 90m, can achieve 300m after increasing special tag, working frequency 433.92MHz, beacon rate range from 2s to 10s etc..M100 label can be by encoding setting at two kinds of beacon rates: when label is static, using low beacon rate；Work as label When the motion sensor summarized is activated, then high beacon rate is used, object is tracked with this.

And used M250RF reader, the reader can directly provide video signal intensity value, can reduce It is not enough enriched and bring position error because of location information.Each reference that translation and report receive can be implemented in reader The signal strength of label or label to be positioned is positioned, so that vehicle management platform, which is able to carry out, quickly positions and identify mark to be positioned Label.M250 reader can monitor that 1400 beacon rates are the label of 10s simultaneously.

When it is implemented, vehicle, before entering parking lot, vehicle management personnel can send out a parking card to parking car owner, The parking card is label to be positioned, and parking car owner needs to put parking card in the car, on this basis, when vehicle passes through visitor When vehicle is searched at family end, the vehicle of vehicle can be found in parking lot using method provided by the invention based on the parking card Parking position.

After its vehicle is driven into Entrance by car owner of stopping, after obtaining parking card, parking car owner stops vehicle to phase After answering position, when larger since parking lot compares, when parking car owner does not remember position of the vehicle in parking lot clearly, visitor can be passed through Family end sends vehicle search request to vehicle management platform, and vehicle management platform, which passes through, implements method provided by the invention, according to Vehicle search request, for parking, car owner determines position of its vehicle in parking lot, it is described in detail below it:

Fig. 2 a is the vehicle lookup side based on parking lot for the vehicle management platform implementation that the embodiment of the present invention one provides The flow diagram of method, comprising the following steps:

S11, receive client transmission vehicle search request after, according to the vehicle identification information of storage with it is to be positioned Corresponding relationship between the identification information of label determines that the vehicle identification information carried in the search request is corresponding to be positioned Label.

When it is implemented, the vehicle identification information can be, but not limited to as license plate number.

When it is implemented, vehicle management platform, when vehicle drives into Entrance, vehicle management platform will record this and stop The information of vehicle car owner or the information of the vehicle are as the vehicle identification information, and then vehicle management personnel can send to parking car owner One parking card, the parking card are the label to be positioned for being used to position the vehicle, and thus vehicle management personnel can establish Corresponding relationship between vehicle identification information and the identification information of label to be positioned.For example, when vehicle identification information is vehicle When license plate number, when it is implemented, the access control system that entrance is arranged in will record the license plate number of the vehicle, then record is distributed to this Stop car owner parking card sequence number, and establish the corresponding relationship between license plate number and the sequence number of parking card, can should Corresponding relationship is stored into list, can determine Parking situation in parking lot with this.

When vehicle is stopped corresponding position in parking lot by car owner of stopping, parking car owner may for a long time stop its vehicle In parking lot, therefore during this period of time, parking car owner may forget position of the vehicle in parking lot, therefore for the ease of Parking car owner quickly finds vehicle, and parking car owner can be sent out by being mounted on the client of mobile terminal to vehicle management platform Vehicle search request is sent, carries vehicle identification information in the vehicle search request；Since vehicle management platform is stored in advance Corresponding relationship between vehicle identification information and the identification information of label to be positioned, therefore, vehicle management platform is receiving After inquiry request, can according to the vehicle identification information and pre-stored vehicle identification information carried in request with it is undetermined Corresponding relationship between the identification information of position label, determines that the vehicle identification information carried in vehicle search request is corresponding undetermined Position label.

S12, the signal strength of the reference location label determined respectively according at least one described RF reader and described The signal strength of label to be positioned, according to preset rules by the sequence of level from high to low successively determine the label to be positioned with Euclidean distance between reference location label.

When it is implemented, reference location label is an active RFID tag in the present invention, can be acquired by RF reader Its signal strength.The present invention is first determined to be positioned using LANDMARC location algorithm according to the sequence that localization region is descending It is a wide range of where label, then further reduce the regional scope where label to be positioned, Step wise approximation, finally determine to Position the location information of label.It is described in detail below it:

When it is implemented, step S12 can be executed according to method shown in Fig. 2 b, comprising the following steps:

For any level, it is performed both by following procedure:

When it is implemented, to be provided with n RF reader in parking lot, the reference location label of setting has N number of level For be illustrated, described by taking the i-th level as an example, integer of the i between 1 and N.

It should be noted that 1 in the embodiment of the present invention~N number of level in, the 1st level belongs to high-level, and n-th layer grade belongs to Low-level.

S121, it is determined each for any reference location label in the i-th level using at least one described RF reader A RF reader collects the signal strength and composition signal strength vector of the reference location label.

When it is implemented, when the i-th level includes m1 reference location label, for any reference location of the i-th level Label, the then signal strength that the n RF reader collects the reference location label can be denoted as Xⁱ _kj, obtained signal is strong Spend the expression formula of vector are as follows:

Sⁱ _kj=(Xⁱ _k1,Xⁱ _k2,...,Xⁱ _kn) (1)

In formula, i indicates the i-th level；K indicates k-th of reference location label in the i-th level；Xⁱ _kjIndicate that j-th of RF is read Device collects the signal strength of k-th of reference location label in the i-th level, Sⁱ _kjIndicate that the n RF reader collects respectively The signal strength vector of the signal strength composition of k-th of reference location label, 1≤k≤m1,1≤j≤n in i-th level.

S122, using at least one described RF reader, determine that each RF reader collects the label to be positioned Signal strength and composition signal strength vector.

When it is implemented, due to having multiple vehicles in parking lot, so vehicle management platform can be indirect when same Receive the vehicle search request that at least one parking car owner sends, that is to say, that there are at least one labels to be positioned, in order to retouch It states conveniently, the quantity of label to be positioned is M in the embodiment of the present invention.

Specifically, it is also illustrated for being provided with n RF reader in parking lot, then it is collected described to be positioned The signal strength of label can be denoted as Yⁱ _j, the expression formula of obtained signal strength vector are as follows:

Sⁱ _qj=(Yⁱ _q1,Yⁱ _q2,...,Yⁱ _qn) (2)

In formula, q is indicated based on q-th of label to be positioned under the i-th level；Yⁱ _qjIndicate that j-th of RF is read based under the i-th level Read the signal strength that device collects q-th of label to be positioned, Sⁱ _qjIndicate that the n RF reader collects respectively_qIt is a undetermined The signal strength vector of the signal strength composition of position label, 1≤q≤M, 1≤j≤n.

S123, according to the signal strength vector of each reference location label in the i-th level for determining and described to be positioned The signal strength vector of label, determine in the i-th level between each reference location label and the label to be positioned it is European away from From and form Euclidean distance vector.

The S determined respectively based on step S121~S122ⁱ _kjAnd Sⁱ _qj, determine each reference location label in the i-th level With the Euclidean distance D between q-th of label to be positionedⁱ _kqExpression formula such as formula (3) shown in:

Each reference location label and in determining the i-th level_qAfter Euclidean distance between a label to be positioned, obtain To Euclidean distance vector be denoted as: Dⁱ=(Dⁱ _1q,Dⁱ _2q,...,Dⁱ _m1q)。

So far, the Euclidean distance in the i-th level between each reference location label and the label to be positioned is determined, by The thought for being statistically known as " nearest-neighbors " is used in the LANDMARC algorithm that the present invention uses.Theoretically, when some When label to be positioned is close with the space length of reference location label, their signal strength indications for the same RF reader It should be similar.Europe based on the principle, in determining the i-th level between each reference location label and label to be positioned After formula distance, the smallest reference location label of Euclidean distance between label to be positioned can be determined in the i-th level, due to each A reference location label has respective localization region, with the regional scope at this place that can reduce label to be positioned, so as to It quickly determines the location information of label to be positioned, also can quickly find position of the vehicle in parking lot.Therefore this hair Bright embodiment proposes after executing step S123, it is also necessary to execute following step:

S124, judge whether the i-th level is lowest hierarchical level, then follow the steps S125 if not；It is no to then follow the steps S129.

When it is implemented, when determining the location information of label to be positioned due to the LANDMARC of use, localization region be by What level was successively decreased, therefore when determining that the i-th level is lowest hierarchical level, then show that label region to be positioned range is very small , then the location information of label to be positioned can be directly determined according to step S129.Conversely, then showing further to reduce The range of label region to be positioned, i.e. execution step S125.

S125, determine that Euclidean distance is minimized corresponding reference location mark in Euclidean distance vector described in the i-th level Label.

When it is implemented, step 123 determine in the i-th level each reference location label and the label to be positioned it Between Euclidean distance and composition Euclidean distance vector after, in order to further reduce the regional scope where label to be positioned, then really The minimum corresponding reference location label of Euclidean distance value in the fixed Euclidean distance vector.Determining Euclidean distance value most When small corresponding reference location label, show that the position of the reference location label is close with the position of the label to be positioned, by This can further reduce seeking scope.

Preferably, if there are the Euclidean distances of at least one reference location label to take minimum in the Euclidean distance vector Value shows label to be positioned for example, the Euclidean distance in the Euclidean distance vector there are two reference location label is minimized It may be at the intersection of the localization region of two reference location labels, then can be executed for any reference location label subsequent Step；Can also based on the two reference location labels execute subsequent step, in the case, finally calculate separately to The location information of positioning label does not have too many differences.

S126, determine that the Euclidean distance is minimized next layer that the localization region of corresponding reference location label includes The reference location label of grade.

When it is implemented, being determined in step s 125 since each reference location label has respective localization region It, can be with reference location label position relationship according to the pre-stored data after Euclidean distance is minimized corresponding reference location label The reference of table, the next level that can include therefrom or in the localization region and its localization region of the reference location label is fixed The reference location label for the i+1 level that position label namely the localization region include.

The radiant power of at least one RF reader described in S127, adjustment.

When it is implemented, when determining that Euclidean distance is minimized the localization region of reference location label include it is next After reference location label, the regional scope being equivalent to where reducing area to be targeted, due to range shorter, then localization region The distance between each RF reader of the reference location tag distances of interior next level is changed, therefore needs to adjust each The radiant power of RF reader.

When it is implemented, the radiant power of at least one RF reader can be adjusted according to method shown in Fig. 2 c, The following steps are included:

S1271, determine respectively the Euclidean distance be minimized corresponding reference location label and each RF reader it Between distance.

When it is implemented, due to after determining the minimum corresponding reference location label of the Euclidean distance, with the reference Positioning label is reference data, it is thus necessary to determine that the distance between the reference location label and each RF reader.

S1272, reduce radiant power apart from nearest RF reader, and increase except apart from nearest RF reader it The radiant power of outer other RF readers.

When it is implemented, in determining step S1271 reference location label between each RF reader at a distance from after, The radiant power apart from nearest RF reader is reduced, while increasing other RF in addition to apart from nearest RF reader and reading The transmission power of device.

Specifically, each RF reader has different energy levels, has 1~8 energy level, each energy level corresponds to corresponding power train Number.

Vehicle management platform using step S1271 determine the minimum corresponding reference location label of Euclidean distance with it is each After the distance between RF reader, the power coefficient of the nearest RF reader of the distance between the positioning label is reduced, and is increased The power coefficient of other RF readers greatly in addition to apart from nearest RF reader.

It should be noted that at least one described RF reader is each in the 1st level to acquire with rated power as i=1 The signal strength of a reference location label, and acquire under the level signal strength of the label to be positioned.

Further, since the embodiment of the present invention has adjusted the radiant power of RF reader, the power of RF reader has directive property Increase or diminution, can achieve the effect that reduce power consumption.

S128, i=i+1.

When it is implemented, after vehicle management platform adjusts the radiant power of each RF reader, so that the parking lot In each RF reader with the positioning area packet of the minimum corresponding reference location label of radiant power adjusted acquisition Euclidean distance The signal strength of the signal strength of the reference location label of the next level contained and the label to be positioned, i.e., execute step again The step of S121~S128.Determined in the level after the minimum corresponding reference location label of Euclidean distance in each level, The radiant power of at least one RF reader is adjusted according to method shown in step S1271~S1272, then described at least one A RF reader is wrapped using the localization region of the minimum corresponding reference location label of radiant power adjusted acquisition Euclidean distance The signal strength of the signal strength of the reference location label of the next level contained and the label to be positioned, until determining minimum The Euclidean distance of the reference location label of level.

It should be noted that in the Euclidean distance for determining lowest hierarchical level, lowest hierarchical level i.e. n-th layer grade, the layer Although the reference location label of grade has localization region, but region is smaller, so need to only utilize the reference location of n-th layer grade Label determines the location information of label to be positioned, without considering its localization region situation.

S129, step S13 is executed.

S13, the Euclidean distance between the reference location label and the label to be positioned of the lowest hierarchical level determined is utilized And the location information of the reference location label of lowest hierarchical level, determine the location information of the label to be positioned.

When it is implemented, the location information of the label to be positioned can be determined according to method shown in Fig. 2 d, including with Lower step:

S131, the Euclidean distance according to the reference location label of the lowest hierarchical level, determine each in the lowest hierarchical level The weighting coefficient of reference location label.

When it is implemented, in the reference location label for determining lowest hierarchical level according to step shown in step S121~S129 Euclidean distance after, also by parking lot have N number of level for be illustrated, when the reference location mark that n-th level includes It is then D=(D according to the Euclidean distance vector that step shown in step S121~S124 is determined when the quantity of label is L_1q, D_2q,...,D_Lq)。

When it is implemented, the quantity for the reference location label that lowest hierarchical level includes is usually no more than 4, i.e. L≤4.

The weighting coefficient for the reference location label that then n-th layer grade includes can be determined according to formula (4):

In formula, w_lIndicate the weighting coefficient of first of reference location label in n-th layer grade；D_lqIt indicates in n-th layer grade first Reference location label and_qEuclidean distance between a label to be positioned.Wherein, 1≤l≤L.

S132, using the weighting coefficient of each reference location label and the location information of each reference location label, Determine the location information of the label to be positioned.

When it is implemented, in determining lowest hierarchical level after the weighting coefficient of each reference location label, due to each ginseng The location information of positioning label is examined it is known that can then determine the location information of the label to be positioned according to formula (5):

In formula in (5), (x_q,y_q) indicate parking lot in q-th of label to be positioned coordinate；(x_l,y_l) indicate parking lot The coordinate of first of reference location label in middle n-th layer grade.

So far, that is, it can determine that in parking lot the location information of the corresponding parking vehicle of q-th of label to be positioned.

S14, Xiang Suoshu client send the response results for carrying the location information of the label to be positioned.

The location information is carried and is tied in response after the location information for determining label to be positioned by vehicle management platform The mobile terminal for being provided with client is sent in fruit, so that parking car owner quickly finds its parking according to the positional information Vehicle.Specifically, vehicle management platform is after the location information for determining the label to be positioned, since the location information is institute State the coordinate information of label to be positioned, and in parking lot each parking stall be actually be divided into several rows which, more especially Big parking lot may go back subregion division, then carry out the division of several column of several rows in each subregion, therefore vehicle management platform is in determination Out after the location information of the label to be positioned, if the location information is directly exactly corresponding row and arranges accordingly, directly Reversed client of feeding；If the location information is not intended to specified corresponding row and corresponding column, first according to Location information determines the corresponding row and column of the location information, then by the row number determined and row number or area Number, row number and row number feed back to client.

It, can be in conjunction with the navigation function of built-in map after mobile terminal receives the operation interface with the response results Parking vehicle can quickly be found.

Vehicle lookup method provided in an embodiment of the present invention based on parking lot is provided at least one radio frequency in parking lot RF reader and several active reference location labels, wherein at least one described RF reader is for acquiring the reference Position the signal strength of label and label to be positioned；The reference location label has different levels, each reference location mark Label are for identifying different localization regions, the reference comprising next level in the localization region of the reference location label of a upper level Position the localization region of label and reference location label；And vehicle management platform is searched in the vehicle for receiving client transmission After request, according to the corresponding relationship between the vehicle identification information of storage and the identification information of label to be positioned, looked into described in determination Look for the corresponding label to be positioned of vehicle identification information carried in request；Then true according at least one RF reader difference The signal strength of the signal strength for the reference location label made and the label to be positioned, according to preset rules by level by height The Euclidean distance between the label to be positioned and reference location label is successively determined to low sequence；And it utilizes and determines most The reference location label of Euclidean distance and lowest hierarchical level between the reference location label of low-level and the label to be positioned Location information determines the location information of the label to be positioned；The position for carrying the label to be positioned is sent to the client The response results of confidence breath.Using the above method, vehicle position can not only be quickly found in parking lot, due also to Using classification localization method, gradually reduces the regional scope where label to be positioned, utilize the reference location mark of lowest hierarchical level It signs and determines vehicle position information, realize the high accuracy positioning to vehicle in parking lot, improve the accuracy of positioning result, together When since RF reader and reference location label only need to be arranged in parking lot, no setting is required such as fingerprint identification device or two dimensional code The quick lookup of vehicle can be realized in scanning means, efficiently solves in the prior art because being read by setting information for use fills Set the generation for the problems such as searching the leakage of owner information caused by method for vehicles.

Embodiment two

For a further understanding of the present invention, the embodiment of the present invention two is to be provided with 4 RF readers and 41 in parking lot It is illustrated for reference location label, this 41 reference location labels divide three grades, and the RF being arranged in parking lot is read The distribution schematic diagram of device, reference location label position and label to be positioned can be with reference to shown in Fig. 3 a.R in Fig. 3 a₁~r₄It is RF Reader is separately positioned on four angles of entire localization region.In entire localization region, pre-determined distance is 20 meters；Logos Circle indicate the first level reference location label, totally 4, on the basis of level-one reference location label position, up and down Each 20 meters of left and right is the localization region of the level-one reference location label, for example, in Fig. 3 a level-one reference location label a positioning area Domain includes four small squares；The circle of grey mark indicates the reference location label of the second level, totally 16, is referred to second level Position label position on the basis of, up and down each 10 meters be the second level reference location label localization region, for example, Fig. 3 a The localization region of middle second level reference location label b is a small square；In the localization region of a second level reference location label In there are three three-level reference location label and a level-one reference location label.The circle of white indicia indicates the ginseng of third level Positioning label is examined, totally 21.D is expressed as a label to be positioned in Fig. 3 a, labeled as the circle for having lattice.

When implementing method provided by the invention, joined since any one label to be positioned inherently falls in one with second level It examines in the square area centered on positioning label, is illustrated by taking upper left corner second level reference location label b in Fig. 3 a as an example, When being positioned in the localization region of second level reference location label b, joined using 3 three-levels for surrounding second level reference location label b Positioning label and a level-one reference location label a are examined to calculate the location information of label d to be positioned.Specific determination process reference Shown in Fig. 3 b:

Fig. 3 b is that the process of the vehicle lookup method provided by Embodiment 2 of the present invention based on parking lot shown in Fig. 3 a is shown It is intended to, comprising the following steps:

S21, after receiving the vehicle search request that sends by client of parking car owner, according to the vehicles identifications of storage Corresponding relationship between information and the identification information of label to be positioned determines the vehicle identification information carried in the search request Corresponding label to be positioned.

When it is implemented, it is no longer superfluous in detail to repeat place with reference to the implementation procedure of step S11 in the embodiment of the present invention one It states.

S22, it is determined each for any reference location label in the i-th level using at least one described RF reader RF reader collects the signal strength of the reference location label and composition signal strength vector.

S23, using at least one described RF reader, determine that each RF reader collects the letter of the label to be positioned Number intensity and composition signal strength vector.

The signal strength vector and the mark to be positioned of each reference location label in the i-th level that S24, basis are determined The signal strength vector of label determines the Euclidean distance in the i-th level between each reference location label and the label to be positioned And form Euclidean distance vector.

S25, judge whether the i-th level is lowest hierarchical level.

S26, determine that Euclidean distance is minimized corresponding reference location mark in Euclidean distance vector described in the i-th level Label.

S27, determine that the Euclidean distance is minimized next layer that the localization region of corresponding reference location label includes The reference location label of grade.

S28, determine that the Euclidean distance is minimized between corresponding reference location label and each RF reader respectively Distance.

The radiant power of S29, reduction apart from nearest RF reader, and increase in addition to apart from nearest RF reader Other RF readers radiant power.

S210, i=i+1.

When it is implemented, the step of executing step S22~S210, it can be with reference to step shown in step S121~S129:

For convenience, the reference location label of first level can be described as level-one reference in the embodiment of the present invention two Label is positioned, the reference location label of same second level can be described as second level reference location label and third level Reference location label can be described as three-level reference location label.

Firstly, 4 RF readers collect the letter of 4 level-one reference location labels with rated output in determining 1st level Number intensity and the signal strength vector constituted are as follows: S¹ _k=(X¹ _k1,X¹ _k2,X¹ _k3,X¹ _k4), 1≤k≤4；And determine that 4 RF are read The signal that the signal strength that device collects label d to be positioned is constituted determines vector are as follows: S¹=(Y¹ ₁,Y¹ ₂,Y¹ ₃,Y¹ ₄), it is possible thereby to The Euclidean distance between label to be positioned and 4 level-one reference location labels is determined according to formula (3) and constitutes Euclidean distance arrow Amount are as follows: D¹=(D¹ ₁,D¹ ₂,D¹ ₂,D¹ ₄)。

After determining the corresponding Euclidean distance vector of the first level, determine that Euclidean distance is most in this 4 Euclidean distances Small corresponding level-one reference location label, it is assumed that the smallest reference location label of the Euclidean distance is that the level-one reference in Fig. 3 a is fixed Position label a, Euclidean distance correspond to D¹ ₁, since the level-one reference location label is not the label of lowest hierarchical level, it is determined that out should The second level reference location label that the localization region of level-one reference location label a includes, with reference to shown in Fig. 3 b, with the level-one with reference to fixed The step of executing step S22~S210 again on the basis of the label a of position include therefore without other level-one reference location labels are calculated Euclidean distance between second level reference location label and label to be positioned can effectively reduce calculation amount.

When determining the location information of label d to be positioned on the basis of level-one reference location label a, with reference to shown in Fig. 3 b, Include 4 second level reference location labels in the localization region of level-one reference location label a, is determined as where label to be positioned Position region changes, therefore needs to adjust the radiant power of 4 RF readers, can determine r₁Corresponding RF reader and one The distance between grade reference location label a recently, then reduces r₁The power coefficient of corresponding RF reader, and then reduce r₁It is corresponding RF reader radiant power, while increasing r₂~r₄The power coefficient of corresponding RF reader, that is, increase r₂~r₄It is right The radiant power for the RF reader answered.So that 4 RF readers acquire level-one reference location label a with radiant power adjusted The signal strength for 4 second level reference location labels for including and the signal strength vector constituted are as follows: S² _m=(X² _m1,X² _m2,X² _m3, X² _m4), 1≤m≤4；Determine that 4 RF readers are constituted with the signal strength that radiant power adjusted collects label d to be positioned Signal determine vector are as follows: S²=(Y² ₁,Y² ₂,Y² ₃,Y² ₄), it is possible thereby to determine label to be positioned and 4 two according to formula (3) Grade reference location label between Euclidean distance and constitute Euclidean distance vector are as follows: D²=(D² ₁,D² ₂,D² ₂,D² ₄)。

In 4 second level reference locations for determining that the localization region of label to be positioned and level-one reference location label a includes After Euclidean distance vector between label, the minimum of the Euclidean distance between this 4 second level reference location labels can be determined Value, it is assumed that the corresponding reference location label of the Euclidean distance minimum value is second level reference location region b shown in Fig. 3 a, European Distance corresponds to D² ₁, since the second level reference location label is not the label of lowest hierarchical level, it is determined that go out the second level reference location The three-level reference location label that the localization region of label b includes, with reference to shown in Fig. 3 b, the positioning of second level reference location label b It include a three three-level reference location label c1, c2, c3 and level-one reference location label a in region.Equally without calculating The Euclidean distance between three-level reference location label and label to be positioned that other three second levels reference location labels include, can be with Effectively reduce calculation amount.

When determining the location information of label d to be positioned on the basis of second level reference location label b, with reference to shown in Fig. 3 b, Include 3 second level reference location labels in the localization region of second level reference location label b, is determined as where label to be positioned Position region changes, therefore needs to adjust the radiant power of 4 RF readers, can determine r₁Corresponding RF reader and two The distance between grade reference location label b recently, then reduces r₁The power coefficient of corresponding RF reader, and then reduce r₁It is corresponding RF reader radiant power, while increasing r₂~r₄The power coefficient of corresponding RF reader, that is, increase r₂~r₄It is right The radiant power for the RF reader answered.So that 4 RF readers acquire second level reference location label b with radiant power adjusted Localization region three three-level reference location labels including signal strength and the signal strength vector that constitutes are as follows: S³ _h= (X³ _h1,X³ _h2,X³ _h3,X³ _h4), 1≤h≤3；Determine that 4 RF readers collect label d to be positioned with radiant power adjusted Signal strength constitute signal determine vector are as follows: S²=(Y² ₁,Y² ₂,Y² ₃,Y² ₄), it is possible thereby to be determined according to formula (3) undetermined Position label and 4 second level reference location labels between Euclidean distance and constitute Euclidean distance vector are as follows: D³=(D³ ₁,D³ ₂, D³ ₂)。

Preferably, since the localization region of second level reference location label b further includes level-one reference location label a, in order to mention The accuracy of high calculated result, it is also possible that 4 RF readers acquire level-one reference location using radiant power adjusted The signal strength of label a simultaneously constitutes signal strength vector, regards level-one reference location label a as three-level reference location mark at this time Label.Based on this in conjunction with three three-level reference location labels, available three reference location labels, a level-one reference location Euclidean distance between label and label d to be positioned simultaneously constitutes Euclidean distance vector are as follows: D^3'=(D³ ₁,D³ ₂,D³ ₂,D³ ₄), D³ ₄For Euclidean distance between level-one reference location label a and label d to be positioned.

S211, the Euclidean distance according to the reference location label of the lowest hierarchical level, determine each in the lowest hierarchical level The weighting coefficient of reference location label.

When it is implemented, formula (4) determines the reference of three three-levels in the step S131 provided with reference to the embodiment of the present invention one Position the weighting coefficient w of label₁、w₂And w₃And the weighting coefficient w of level-one reference location label₄。

S212, using the weighting coefficient of each reference location label and the location information of each reference location label, Determine the location information of the label to be positioned.

When it is implemented, if including three three-level reference location labels by the localization region of second level reference location label b To determine the location information of label d to be positioned, it is determined that the location information of the label d to be positioned gone out are as follows: (x, y)=w₁*(x₁, y₁)+w₂*(x₂,y₂)+w₃*(x₃,y₃)。

If the localization region of second level reference location label b includes three three-level reference location labels and a level-one reference Label a is positioned to determine the location information of label d to be positioned, it is determined that the location information of the label d to be positioned gone out are as follows: (x, y) =w₁*(x₁,y₁)+w₂*(x₂,y₂)+w₃*(x₃,y₃)+w₄*(x₄,y₄)。

S213, Xiang Suoshu client send the response results for carrying the location information of the label to be positioned.

After vehicle management platform calculates the location information of label d to be positioned, the location information of vehicle has also been determined that out, The location information is then fed back into client, so that parking car owner quickly finds its parking vehicle according to the positional information. When it is implemented, overlaps will not be repeated with reference to the implementation procedure of step S14 in the embodiment of the present invention one.

The vehicle lookup method in parking lot provided by Embodiment 2 of the present invention is sent out receiving parking car owner by client After the vehicle search request sent, according to the corresponding relationship between vehicle identification information and the identification information of label to be positioned, determine The corresponding label to be positioned of the vehicle identification information carried in the search request；For any reference location in the i-th level Label determines that each RF reader collects the signal strength of the reference location label using at least one described RF reader And form signal strength vector；Using at least one described RF reader, it is described to be positioned to determine that each RF reader collects The signal strength and composition signal strength vector of label；And according to the letter of reference location label each in the i-th level determined The signal strength vector of number strength vector and the label to be positioned, determine in the i-th level each reference location label with it is described Euclidean distance and composition Euclidean distance vector between label to be positioned；And when determining the i-th level is lowest hierarchical level, i.e., Each reference location label in the lowest hierarchical level can be determined according to the Euclidean distance of the reference location label of the lowest hierarchical level Weighting coefficient；And the weighting coefficient of each reference location label and the location information of each reference location label are utilized, Determine the location information of the label to be positioned.So far location information of the vehicle in parking lot can be quickly determined.In addition, When determining the i-th level not is lowest hierarchical level, determine that Euclidean distance is minimized in Euclidean distance vector described in the i-th level Corresponding reference location label determines that the Euclidean distance is minimized the localization region of corresponding reference location label and includes The reference location label of next level；And determine respectively the Euclidean distance be minimized corresponding reference location label with it is each The distance between RF reader, then reduces the radiant power apart from nearest RF reader, and increases except distance is nearest The radiant power of other RF readers except RF reader, so that RF reader determines i-th using radiant power adjusted The reference for next level that the minimum corresponding reference location label of Euclidean distance includes in the Euclidean distance vector that level is determined The Euclidean distance between label and label to be positioned is positioned, it is possible thereby to successively reduce the localization region where label to be positioned Range only need to be based on the minimum corresponding reference location label of Euclidean distance in the level and due to being directed to each level The reference location label for next level that localization region includes calculates the location information of label to be positioned, and wireless computing is in same The Euclidean distance between second level reference location label and label to be positioned that the other reference location labels of level include, can be effective Calculation amount is reduced, server stress is reduced.And the regional scope as where successively reducing label to be positioned, so that final To the accuracy of location information of label to be positioned effectively improve.Further, due to parking of embodiment of the present invention factory In no setting is required information read device, it is possible to prevente effectively from the leakage of parking car owner's personal information.

Embodiment three

Based on the same inventive concept, a kind of vehicle lookup device based on parking lot is additionally provided in the embodiment of the present invention, Since the principle that above-mentioned apparatus solves the problems, such as is similar to the vehicle lookup method based on parking lot, the implementation of above-mentioned apparatus can With referring to the implementation of method, overlaps will not be repeated.

As shown in figure 4, the structural schematic diagram of device is searched for the vehicle based on parking lot that the embodiment of the present invention three provides, At least one radio frequency reader and several active reference location labels are provided in the parking lot, wherein it is described extremely A few RF reader is used to acquire the signal strength of the reference location label and label to be positioned；The reference location label With different levels, each reference location label is for identifying different localization regions, the reference location label of a upper level Localization region in comprising next level reference location label and reference location label localization region；And

Described device, comprising: the first determination unit 41, the second determination unit 42, third determination unit 43 and transmission unit 44, in which:

First determination unit 41, for receive client transmission vehicle search request after, according to the vehicle of storage Corresponding relationship between identification information and the identification information of label to be positioned determines the vehicles identifications carried in the search request The corresponding label to be positioned of information；

Second determination unit 42, reference location label for being determined respectively according at least one described RF reader The signal strength of signal strength and the label to be positioned successively determines institute by the sequence of level from high to low according to preset rules State the Euclidean distance between label to be positioned and reference location label；

Third determination unit 43, for the reference location label and the label to be positioned using the lowest hierarchical level determined Between Euclidean distance and lowest hierarchical level reference location label location information, determine the label to be positioned position letter Breath；

Transmission unit 44, for sending the response knot for carrying the location information of the label to be positioned to the client Fruit.

Preferably, second determination unit 42, is specifically used for being directed to any level, is performed both by following procedure: being directed to should Any reference location label in level determines that each RF reader collects the ginseng using at least one described RF reader Examine the signal strength and composition signal strength vector of positioning label；Using at least one described RF reader, determine that each RF is read Read signal strength and composition signal strength vector that device collects the label to be positioned；According to each in the level determined The signal strength vector of the signal strength vector of reference location label and the label to be positioned determines each reference in the level Position the Euclidean distance and composition Euclidean distance vector between label and the label to be positioned；And determining the level not When being lowest hierarchical level, determine that Euclidean distance is minimized corresponding reference location mark in Euclidean distance vector described in the level Label；Determine the Euclidean distance be minimized next level that the localization region of corresponding reference location label includes reference it is fixed Position label；And the radiant power of at least one RF reader is adjusted, so that at least one described RF reader utilizes adjustment Radiant power afterwards executes the letter for any reference location label for determining that each RF reader collects next level again Number intensity and the signal strength of the label to be positioned, determine in next level each reference location label with it is described undetermined Euclidean distance and composition Euclidean distance and the determining Euclidean distance between the label of position are minimized corresponding reference location mark The step of reference location label for next level that the localization region of label includes, until determining the reference location mark of lowest hierarchical level Euclidean distance between label and the label to be positioned.

Preferably, second determination unit 42, specifically for determining that it is corresponding that the Euclidean distance is minimized respectively The distance between reference location label and each RF reader；And radiant power apart from nearest RF reader is reduced, and Increase the radiant power of other RF readers in addition to apart from nearest RF reader.

Preferably, the third determination unit 43, specifically for the Europe according to the reference location label of the lowest hierarchical level Formula distance determines the weighting coefficient of each reference location label in the lowest hierarchical level；And utilize each reference location mark The location information of the weighting coefficient of label and each reference location label determines the location information of the label to be positioned.

For convenience of description, above each section is divided by function describes respectively for each module (or unit).Certainly, exist Implement to realize the function of each module (or unit) in same or multiple softwares or hardware when the present invention.For example, this The vehicle based on parking lot that inventive embodiments three provide is searched device and be can be set in server, by server according to reception The vehicle search request arrived searches location information of its vehicle in the parking lot for car owner.

Example IV

The embodiment of the present invention four provides a kind of communication equipment, including memory, processor and is stored on the memory And the computer program that can be run on the processor；The processor realizes step as described below when executing described program It is rapid:

After receiving the vehicle search request that parking car owner is sent by client, carried according in the search request Vehicle identification information, determine the corresponding label to be positioned of the vehicle identification information；And

The label to be positioned and reference location label are successively determined by the sequence of level from high to low according to preset rules Between Euclidean distance；And

Embodiment five

The embodiment of the present invention five provides a kind of computer readable storage medium, is stored thereon with computer program, the program The described in any item vehicles based on parking lot provided such as the embodiment of the present invention one or embodiment two are provided when being executed by processor Step in lookup method.

Vehicle provided by embodiments herein based on parking lot is searched device and be can be realized by a computer program.This Field technical staff it should be appreciated that above-mentioned module division mode is only one of numerous module division modes, if It is divided into other modules or non-division module, it, all should be as long as vehicle based on parking lot searches device and has an above-mentioned function Within the protection scope of the application.

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more, The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces The form of product.

The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of vehicle lookup method based on parking lot, which is characterized in that be provided at least one radio frequency in parking lot and read Read device and several active reference location labels, wherein at least one described RF reader is for acquiring the reference location The signal strength of label and label to be positioned；The reference location label has different levels, and each reference location label is used It include the reference location of next level in the localization region of the reference location label of a upper level in identifying different localization regions The localization region of label and reference location label；And

The method, comprising:

After the vehicle search request for receiving client transmission, according to the mark of the vehicle identification information of storage and label to be positioned Know the corresponding relationship between information, determines the corresponding label to be positioned of the vehicle identification information carried in the search request；And

The signal strength for the reference location label determined respectively according at least one described RF reader and the mark to be positioned The signal strength of label successively determines the label to be positioned and reference location by the sequence of level from high to low according to preset rules Euclidean distance between label；And

Utilize the Euclidean distance and lowermost layer between the reference location label and the label to be positioned of the lowest hierarchical level determined The location information of the reference location label of grade, determines the location information of the label to be positioned；

2. the method as described in claim 1, which is characterized in that the ginseng determined respectively according at least one described RF reader The signal strength of positioning label and the signal strength of the label to be positioned are examined, is successively determined according to preset rules described undetermined Euclidean distance between position label and reference location label, specifically includes:

For any level, it is performed both by following procedure:

Each RF reader is determined using at least one described RF reader for any reference location label in the level Collect the signal strength of the reference location label and composition signal strength vector；

Using at least one described RF reader, determine that each RF reader collects the signal strength of the label to be positioned simultaneously Form signal strength vector；

According to the signal of the signal strength vector of reference location label each in the level determined and the label to be positioned Strength vector, determines the Euclidean distance in the level between each reference location label and the label to be positioned and composition is European Distance vector；And

When determining the level not is lowest hierarchical level, determine that Euclidean distance takes minimum in Euclidean distance vector described in the level It is worth corresponding reference location label；

Determine that the Euclidean distance is minimized the reference for next level that the localization region of corresponding reference location label includes Position label；And

The radiant power of at least one RF reader is adjusted, so that at least one described RF reader utilizes spoke adjusted Penetrate the signal strength that power executes any reference location label for determining that each RF reader collects next level again With the signal strength of the label to be positioned, determine each reference location label and the label to be positioned in next level Between Euclidean distance and composition Euclidean distance and determine that the Euclidean distance is minimized determining for corresponding reference location label The step of reference location label for next level that position region includes, until determining reference location label and the institute of lowest hierarchical level State the Euclidean distance between label to be positioned.

3. method according to claim 2, which is characterized in that adjust the radiant power of at least one RF reader, tool Body includes:

Determine that the Euclidean distance is minimized the distance between corresponding reference location label and each RF reader respectively；And

The radiant power apart from nearest RF reader is reduced, and increases other RF in addition to apart from nearest RF reader The radiant power of reader.

4. the method as described in claim 1, which is characterized in that utilize the Europe of the reference location label for the lowest hierarchical level determined The location information of the reference location label of formula distance and lowest hierarchical level, determines the location information of the label to be positioned, specific to wrap It includes:

According to the Euclidean distance of the reference location label of the lowest hierarchical level, each reference location mark in the lowest hierarchical level is determined The weighting coefficient of label；And

Using the weighting coefficient of each reference location label and the location information of each reference location label, determine it is described to Position the location information of label.

5. method as claimed in claim 4, which is characterized in that according to the following equation according to the reference location of the lowest hierarchical level The Euclidean distance of label determines the weighting coefficient of each reference location label in the lowest hierarchical level:

6. a kind of vehicle based on parking lot searches device, which is characterized in that be provided at least one radio frequency in parking lot and read Read device and several active reference location labels, wherein at least one described RF reader is for acquiring the reference location The signal strength of label and label to be positioned；The reference location label has different levels, and each reference location label is used It include the reference location of next level in the localization region of the reference location label of a upper level in identifying different localization regions The localization region of label and reference location label；And

Described device, comprising:

First determination unit, for being believed after the vehicle search request for receiving client transmission according to the vehicles identifications of storage Corresponding relationship between breath and the identification information of label to be positioned, determines the vehicle identification information pair carried in the search request The label to be positioned answered；

The signal of second determination unit, the reference location label for being determined respectively according at least one described RF reader is strong The signal strength of degree and the label to be positioned is successively determined according to preset rules by the sequence of level from high to low described undetermined Euclidean distance between position label and reference location label；

Third determination unit, between the reference location label and the label to be positioned using the lowest hierarchical level determined The location information of Euclidean distance and the reference location label of lowest hierarchical level determines the location information of the label to be positioned；

7. device as claimed in claim 6, which is characterized in that

Second determination unit is specifically used for being directed to any level, is performed both by following procedure: for any ginseng in the level Positioning label is examined, using at least one described RF reader, determines that each RF reader collects the letter of the reference location label Number intensity and composition signal strength vector；Using at least one described RF reader, it is described to determine that each RF reader collects The signal strength and composition signal strength vector of label to be positioned；According to reference location label each in the level determined The signal strength vector of signal strength vector and the label to be positioned, determine in the level each reference location label with it is described Euclidean distance and composition Euclidean distance vector between label to be positioned；And when determining the level not is lowest hierarchical level, Determine that Euclidean distance is minimized corresponding reference location label in Euclidean distance vector described in the level；It determines described European Distance is minimized the reference location label for next level that the localization region of corresponding reference location label includes；And adjust institute The radiant power of at least one RF reader is stated, so that at least one described RF reader utilizes radiant power adjusted again Execute the signal strength of any reference location label for determining that each RF reader collects next level and described undetermined Position label signal strength, determine it is European between each reference location label and the label to be positioned in next level The distance and localization region for forming Euclidean distance and determining that the Euclidean distance is minimized corresponding reference location label includes Next level reference location label the step of, until determine lowest hierarchical level reference location label and the mark to be positioned Euclidean distance between label.

8. device as claimed in claim 7, which is characterized in that

Second determination unit, specifically for determine respectively the Euclidean distance be minimized corresponding reference location label with The distance between each RF reader；And radiant power apart from nearest RF reader is reduced, and increase except distance recently RF reader except other RF readers radiant power.

9. device as claimed in claim 7, which is characterized in that

The third determination unit determines institute specifically for the Euclidean distance according to the reference location label of the lowest hierarchical level State the weighting coefficient of each reference location label in lowest hierarchical level；And using each reference location label weighting coefficient and The location information of each reference location label determines the location information of the label to be positioned.

10. device as claimed in claim 9, which is characterized in that

The third determination unit, specifically for according to the following equation according to the European of the reference location label of the lowest hierarchical level Distance determines the weighting coefficient of each reference location label in the lowest hierarchical level:

D_lIt indicates the in lowest hierarchical level_lEuclidean distance between a reference location label and the label to be positioned；

11. a kind of communication equipment, including memory, processor and it is stored on the memory and can transports on the processor Capable computer program；It is characterized in that, the processor is realized when executing described program such as any one of Claims 1 to 5 institute The vehicle lookup method based on parking lot stated.

12. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor The step in the vehicle lookup method as claimed in any one of claims 1 to 5 based on parking lot is realized when execution.