CN108806280A - parking space state detection method and device - Google Patents
parking space state detection method and device Download PDFInfo
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- CN108806280A CN108806280A CN201810753402.7A CN201810753402A CN108806280A CN 108806280 A CN108806280 A CN 108806280A CN 201810753402 A CN201810753402 A CN 201810753402A CN 108806280 A CN108806280 A CN 108806280A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/14—Traffic control systems for road vehicles indicating individual free spaces in parking areas
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Abstract
The present invention is suitable for parking stall measure technical field, provides parking space state detection method and device, the method includes：Emit frequency shift keying fsk signal to parking area to be detected, receives the first Echo Rating；According to the first Echo Rating and default snr threshold, the first parking space state is obtained；If the first parking space state is there are moving vehicle, emits frequency shift keying fsk signal and obtain the movable information of moving vehicle；If the first parking space state is there is no moving vehicle, emits the continuous FMCW signal of frequency modulation and receive the second Echo Rating；According to the second Echo Rating and background return value, the second parking space state is obtained；If the second parking space state is there are stationary vehicle, emit the continuous FMCW signal of frequency modulation；If the second parking space state is empty parking space state, emit frequency shift keying fsk signal, the above method can automatically select modulated signal according to the behavior state of target, to the use state of the acquisition parking stall to be detected of fast accurate.
Description
Technical field
The invention belongs to parking stall measure technical field more particularly to a kind of parking space state detection method and device.
Background technology
Recently as economic fast development, the ownership sustainable growth of automobile, while increasing for vehicle also brings
The problem of traffic congestion and parking difficulty.Parking stall measure technology can whether there is vehicle by external equipment to detect on parking stall
, and parking space information is sent to display equipment and is shown, it can quickly and effectively manage parking space state.
Existing method for detecting parking stalls mostly uses greatly geomagnetic induction coil, ultrasonic wave and camera to be examined to parking space state
It surveys, still, can be influenced by earth magnetic field and electromagnetic field using the method that geomagnetic induction coil detects parking stall, examined using ultrasonic wave
The method of measuring car position is easy to be influenced by sleet environment, using the method for camera detection parking stall to weather and ambient brightness requirement
It is higher.Therefore, the above method all has the shortcomings that accuracy of detection is not high.
Invention content
In view of this, an embodiment of the present invention provides a kind of parking space state detection method and device, to solve the prior art
The problem of middle parking space state testing result inaccuracy.
The first aspect of the embodiment of the present invention provides a kind of parking space state detection method, including：
Emit frequency shift keying fsk (Frequency-shift keying) signal to parking area to be detected, receives first
Echo Rating；
According to the first Echo Rating and default snr threshold, the first parking space state is obtained；
If the first parking space state is there are moving vehicle, continue to parking area to be detected transmitting frequency shift keying fsk letter
Number and obtain the movable information of moving vehicle；If the first parking space state is that there is no moving vehicles, to parking area to be detected
Emit the continuous FMCW of frequency modulation (Frequency Modulated Continuous Wave) signals and receives the second Echo Rating；
According to the second Echo Rating and background return value, the second parking space state is obtained；
If the second parking space state is there are stationary vehicle, continue to the continuous FMCW letters of parking area to be detected transmitting frequency modulation
Number；If the second parking space state is empty parking space state, emit frequency shift keying fsk signal to parking area to be detected.
Optionally, described to emit frequency shift keying fsk signal to parking area to be detected, before receiving the first Echo Rating, also
Including：
When parking stall to be detected is in empty parking space state, emits the continuous FMCW signal of frequency modulation to parking area to be detected, obtain
Take background return value.
Optionally, described according to the first Echo Rating and default snr threshold, the first parking space state is obtained, is specifically included：
Judge whether the first Echo Rating received is more than default snr threshold；
If more than then the first parking space state is that there are moving vehicles.
Optionally, described according to the second Echo Rating and background return value, the second parking space state is obtained, is specifically included：
Judge whether the second Echo Rating received is more than background return value；
If more than then the second parking space state is that there are stationary vehicles.
Optionally, after obtaining the first parking space state and/or obtaining the second parking space state, further include：
Parking space state information is obtained, and the parking space state information is uploaded to server；
The parking space state information includes：The parking space state of parking stall position and different time.
Optionally, after the acquisition parking space state information, further include：
The parking space state information is analyzed, the parking stall occupancy situation of different periods is obtained.
The second aspect of the embodiment of the present invention provides a kind of parking space state detection device, including：Transmission module, parking stall shape
State acquisition module and control module；
The transmission module receives the first Echo Rating for emitting frequency shift keying fsk signal to parking area to be detected；
It is additionally operable to the continuous FMCW signal of parking area to be detected transmitting frequency modulation and receives the second Echo Rating；
The parking space state acquisition module, for according to first Echo Rating and default snr threshold, obtaining first
Parking space state；It is additionally operable to, according to the second Echo Rating and background return value, obtain the second parking space state；
The control module then continues for being that there are moving vehicles when the first parking space state to parking area to be detected
Transmitting frequency shift keying fsk signal and the movable information for obtaining moving vehicle；When the first parking space state be there is no moving vehicles, then
Emit the continuous FMCW signal of frequency modulation to parking area to be detected；It is additionally operable to when the second parking space state be to continue there are stationary vehicle
Emit the continuous FMCW signal of frequency modulation to parking area to be detected；When the second parking space state be empty parking space state, to parking stall to be detected
Field emission frequency shift keying fsk signal.
Optionally, the control module is additionally operable to when parking stall to be detected is in empty parking space state, to parking stall area to be detected
Domain emits the continuous FMCW signal of frequency modulation, obtains background return value.
The third aspect of the embodiment of the present invention provides a kind of parking space state detection device, including：Memory, processor with
And it is stored in the computer program that can be run in the memory and on the processor, the processor executes the calculating
It is realized when machine program as described in any of the above-described the step of parking space state detection method.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, and the parking space state as described in any of the above-described is realized when the computer program is executed by processor
The step of detection method.
Existing advantageous effect is the embodiment of the present invention compared with prior art：The embodiment of the present invention is by measuring car to be checked
Position field emission frequency shift keying fsk signal whether there is moving vehicle to detect parking stall, lasting to send out when detecting moving vehicle
It penetrates frequency shift keying fsk signal and obtains the movable information of vehicle, when there is no moving vehicle, then emit to area to be tested and adjust
The continuous FMCW signal of frequency whether there is stationary vehicle to detect parking stall, and when detecting stationary vehicle, then persistently transmitting frequency modulation connects
Continuous FMCW signal then emits frequency shift keying fsk signal when being detected as empty parking space state, and standard is able to using two kinds of waveforms
The characteristics of really detecting moving target and static target is come to emit different waveforms when parking stall is in different conditions to vehicle
Position state is detected, and then the state of the acquisition parking stall of fast accurate.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only the present invention some
Embodiment for those of ordinary skill in the art without having to pay creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the implementation process schematic diagram of parking space state detection method provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of parking space state detection device provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of parking space state detection terminal equipment provided in an embodiment of the present invention.
Specific implementation mode
In being described below, for illustration and not for limitation, it is proposed that such as tool of particular system structure, technology etc
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention can also be realized in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
Embodiment one
In the present embodiment, parking space state detection method is to send modulated signal to parking stall to be detected by radar, wherein
Radar is arranged near parking stall to be detected, and a radar corresponds to a parking stall to be detected.Used by the present embodiment
Modulated signal is two kinds, respectively frequency shift keying fsk signal and the continuous FMCW signal of frequency modulation, wherein both signals are by thunder
What the frequency synthesiser section reached generated, the signal of generation is emitted by antenna to parking area to be detected.Due to a parking stall
State include there are moving vehicle, there are several states such as stationary vehicle and empty parking space, therefore, it is necessary to judge parking stall to be detected
With the presence or absence of moving target, static target and there is no targets etc..However, frequency shift keying fsk signal cannot detect it is static
Target, but can detect movement target and accurately obtain moving target movement state information, the continuous FMCW of frequency modulation
Signal cannot detect the movement state information of moving target, but be able to detect that static target, in the application using this two
The characteristics of kind waveform, the accurate different conditions for detecting parking stall.
Fig. 1 shows the implementation process schematic diagram of parking space state detection method in the present embodiment, and details are as follows：
Step S101 emits frequency shift keying fsk signal to parking area to be detected, receives the first Echo Rating.
In the present embodiment, whether just to need first to detect radar each section before sending signal to parking area to be detected
Often, such as antenna and frequency synthesizer control frequency synthesizer if antenna and frequency synthesizer are in normal operating conditions
Emit frequency shift keying fsk signal.Wherein, frequency synthesizer is transmitting frequency shift keying fsk signal under initial situation, with detection
Vehicle of the parking stall to be detected with the presence or absence of movement.Wherein, when antenna emits frequency shift keying fsk signal to parking area to be detected
Afterwards, parking area to be detected can return to a first echo signal, and radar can receive first echo signal by antenna, and to the
Echo data entrained by one echo-signal is analyzed, and judges that parking stall to be detected whether there is moving vehicle.
It should be noted that before control frequency synthesizer transmitting signal, a detection range can be preset, it is described
The length of detection range is the length of a parking stall, such as：It is set as 6m.When the signal of frequency synthesizer transmitting is in detecting area
When domain, the intensity of the intensity of the signal of transmitting and the echo-signal of reception is capable of the state of accurate judgement parking stall.
Optionally, described to emit frequency shift keying fsk signal to parking area to be detected, before receiving the first Echo Rating, also
Including：
When parking stall to be detected is in empty parking space state, emits the continuous FMCW signal of frequency modulation to parking area to be detected, obtain
Take background return value.
In the present embodiment, before emitting frequency shift keying fsk signal to parking area to be detected, that is, radar is being examined
Background return value when needing first to obtain empty parking space state before surveying parking space state.Specifically, when radar is after the power-up
The initialization of system, wherein the process of initialization is exactly to obtain the background return value of parking stall.Specifically, when detecting that radar powers on
Afterwards, when while the state of parking stall to be detected is empty parking space state, control frequency synthesizer emits the continuous FMCW signal of frequency modulation, is sending out
The echo-signal that parking area to be detected returns can be received later by penetrating signal, set the signal value of this echo-signal to background
Echo Rating, the background return value of acquisition are the important informations for detecting parking stall and whether there is stationary vehicle.
Step S102 obtains the first parking space state according to the first Echo Rating and default snr threshold.
In the present embodiment, it is by emitting frequency shift keying fsk signal to parking area to be detected, to judge measuring car to be checked
Position whether there is moving vehicle.Specifically, needing to transport to determine whether existing by default snr threshold and the first Echo Rating
Motor-car.Wherein, default snr threshold is to discriminate between the threshold value of moving vehicle and movement human, the default snr threshold with
The RCS (Radar Cross Section, Radar Cross Section) of different objects is related.For different objects, property,
Shape and distribution objectives are different, to corresponding different RCS.On parking stall, in order to avoid the human body misidentification that will be moved
A snr threshold is obtained to have the characteristics that different RCS from vehicle based on human body for the vehicle of movement, to accurate
The target of detection movement is the vehicle of movement.
Optionally, according to the first Echo Rating and default snr threshold, the first parking space state is obtained, is specifically included：
Judge whether the first Echo Rating received is more than default snr threshold；
If more than then the first parking space state is that there are moving vehicles.
It in the present embodiment, can be by the first Echo Rating of reception when judging that parking stall to be detected whether there is moving vehicle
It is compared with preset snr threshold.Wherein, since the RCS values of vehicle are more than the RCS values of human body, when what is detected
When first Echo Rating is more than default snr threshold, then it may determine that there are moving targets for parking stall to be detected, and moving target is
Moving vehicle；Opposite, when detecting that the first Echo Rating is not more than default snr threshold, then parking space state may be to exist
Stationary vehicle state or empty parking space state.Therefore, it is necessary to judge parking stall to be detected by emitting the continuous FMCW signal of frequency modulation
State.
Step S103 continues to emit frequency displacement to parking area to be detected if the first parking space state is there are moving vehicle
Keying fsk signal and the movable information for obtaining moving vehicle；If the first parking space state is there is no moving vehicle, to be detected
Parking area emits the continuous FMCW signal of frequency modulation and receives the second Echo Rating.
In the present embodiment, when detecting parking stall there are when moving vehicle, then continue to emit frequency displacement key to parking stall to be detected
Fsk signal is controlled, to be monitored to the motion state of moving vehicle, while obtaining the movable information of moving vehicle, such as：Vehicle
The direction etc. of the speed of traveling, the range information of vehicle and vehicle traveling.Specifically：When vehicle movement, radar system
The movement velocity that moving vehicle can be obtained by Doppler frequency shift obtains vehicle and radar by phase difference between echo frequency
Distance, and positive and negative acquisition moving vehicle by the first echo frequency travel direction.
Conversely, when moving vehicle is not present in parking space state, then it is continuous should to emit frequency modulation to parking area to be detected
FMCW signal, and the second echo signal that parking stall to be detected returns is received, to judge parking stall to be detected for there are stationary vehicle shapes
State or empty parking space state.
Step S104 obtains the second parking space state according to the second Echo Rating and background return value.
In the present embodiment, sport(s) car is not detected after by emitting frequency shift keying fsk signal to parking stall to be detected
When, can switching emission waveform be the continuous FMCW signal of frequency modulation.Wherein, empty parking space shape is obtained at the time of radar initializes
Background return value under state, the transmitting continuous FMCW signal signal of frequency modulation is to parking stall to be detected again at this time, according to the second Echo Rating
The state of parking stall to be detected can be judged for there are stationary vehicle or empty parking space states with background return value.
Wherein, herein the second parking space state and above-mentioned first parking space state is parking stall state that may be present, first,
Emit frequency shift keying fsk signal to obtain the first Echo Rating to parking stall to be detected, parking stall can be determined according to the first Echo Rating
Status information is that there are moving vehicle state or moving vehicle state is not present, when the first parking space state is that there is no moving vehicles
When state, the second Echo Rating is obtained by emitting the continuous FMCW signal of frequency modulation, may further determine that according to the second Echo Rating
State there is no moving vehicle is that there are stationary vehicle state or empty parking space states.
Optionally, described according to the second Echo Rating and background return value, the second parking space state is obtained, is specifically included：
Judge whether the second Echo Rating received is more than background return value；
If more than then the second parking space state is that there are stationary vehicles.
In the present embodiment, the specific method of parking space state to be detected is judged according to the second Echo Rating and background return value
For：By comparing the size of the second Echo Rating and background return value, it whether there is stationary vehicle on parking stall to be detected to detect,
The foundation of middle judgement is：When parking stall to be detected is there are when stationary vehicle, can echo-signal be changed.Wherein, judging
It is clutter map detection method, the wherein detection method of clutter map that parking stall to be detected, which whether there is principle used when stationary vehicle,
For：Background return value when empty parking space state is first obtained, then obtains that there are the second Echo Ratings when stationary vehicle, when there are static
The second Echo Rating when vehicle can be more than background return value when empty parking space state；Conversely, when the second Echo Rating is not more than background
When Echo Rating, then it represents that stationary vehicle is not present on parking stall to be detected.
Step S105 continues to connect to parking area to be detected transmitting frequency modulation if the second parking space state is there are stationary vehicle
Continuous FMCW signal；If the second parking space state is empty parking space state, emit frequency shift keying fsk signal to parking area to be detected.
In the present embodiment, when detect parking stall state be there are when stationary vehicle, then can continue to parking stall to be detected
The continuous FMCW signal of frequency modulation is sent, to be monitored to the stationary vehicle deposited；When there is no stationary vehicle, that is to say, that be
When empty parking space state, then the signal of transmitting is converted into frequency shift keying fsk signal, to detect whether that there are moving vehicles, also
It has been to detect whether that vehicle is travelled into parking stall to be detected.
It should be noted that being to use the continuous FMCW signal pair of frequency modulation there are when stationary vehicle in the second parking space state
When stationary vehicle is monitored, it may detect that stationary vehicle moves, that is to say, that stationary vehicle travels out from parking stall
The process gone.Wherein, what the continuous FMCW signal of frequency modulation emitted substantially included is the combination signal of FMCW signal and point frequency,
Include the point-frequency signal of the FMCW signal and T2 times of T1 times, may determine that whether stationary vehicle starts to move by a frequency
It is dynamic.Specifically, Doppler frequency shift can occur as the vehicle moves, to be judged as that vehicle moves, thus by radar emission
Signal frequency shift keying fsk signal is converted to by the continuous FMCW signal of frequency modulation, and then the motion state of vehicle is monitored, is obtained
Pick up the car it is capable from parking stall when movable information.
In the present embodiment, the modulated signal that parking space state is detected by adjusting, so as to accurately obtain parking stall
Status information.Such as：Under initial situation, when parking stall is empty parking space, first passes through the transmitting continuous FMCW signal of frequency modulation and waited for obtain
The background return value of parking stall is detected, and the background return value is stored, for judging that parking stall whether there is static vehicle
?.After background return value when obtaining empty parking space state, the signal of transmitting is adjusted to frequency shift keying fsk signal, to detect
Parking stall to be detected is with the presence or absence of the vehicle moved, that is, has detected whether that vehicle travels into or travel out parking stall to be detected, when
After detecting moving vehicle, persistently emit frequency shift keying fsk signal and moving vehicle is monitored, and obtains the movement letter of vehicle
Breath.When can't detect moving vehicle by preset time, then emit the continuous FMCW signal of frequency modulation is to detect parking stall to be detected
It is no that whether there are stationary vehicles, that is, detection docking process or the vehicle process of travelling away to complete.When detecting stationary vehicle
When, then persistently the transmitting continuous FMCW signal of frequency modulation is monitored stationary vehicle, until when detecting vehicle setting in motion, transmitting
Frequency shift keying fsk signal；When can't detect stationary vehicle by preset time, that is, when vehicle travels away, it will emit
Signal be adjusted to frequency shift keying fsk signal, detect whether parking stall to be detected has other vehicles traveling to come in.
Optionally, after obtaining the first parking space state and/or obtaining the second parking space state, further include：
Parking space state information is obtained, and the parking space state information is uploaded to server；
The parking space state information includes：The parking space state of parking stall position and different time.
In the present embodiment, after obtaining parking space state, parking space state information, parking space state can also further be obtained
The acquisition methods of information can be：After obtaining parking space state, while obtaining current temporal information and parking stall to be detected
Parking stall number information, and the parking space state, temporal information and parking stall number information are corresponded, and by parking space state information
It is uploaded to server, so that remote terminal can obtain the behaviour in service of parking stall in real time, and is timely updated.Such as：
When detecting parking stall that number is 0055 20:When 08 branch drives into vehicle, then record is proceeded by, by current time, vehicle
Travel speed and operating range, parking stall number corresponded to, and be uploaded to server so that relevant staff or car owner can
Parking space information is obtained, the relevant information of parking stall can be parked convenient for quick obtaining.
Optionally, after the acquisition parking space state information, further include：
The parking space state information is analyzed, the parking stall occupancy situation of different periods is obtained.
In the present embodiment, the parking space state information of acquisition can also be analyzed, is counted in each period daily
The idle condition of parking stall enables a user to the reasonable arrangement travel time, avoids peak period from stopping as possible.Such as：
Can be according to the status information of each parking stall of acquisition, to calculate the parking index in each period, the parking index can
To include parking quantity, average down time, parking stall utilization rate etc., and it is uploaded to remote terminal.
Specifically, the computational methods of parking quantity can be：The parking quantity of single parking stall in each period is first calculated,
When such as getting vehicle and driving into parking stall and be driven out to an information on the parking stall after a period of time, by the parking of the parking stall
Quantity adds one, and then obtains the parking quantity of all parking stalls in a period of time；The computational methods of average down time can be：Root
The down time that the time obtains each vehicle is driven into or out of according to vehicle, sums the down time of each vehicle to obtain
The total down time for having vehicle, the quotient for calculating total down time and quantity of stopping obtain average down time；Parking stall utilization rate
Computational methods can be：By determining that period obtains total time, then obtain stopping for all vehicles in the period
Vehicle total time the quotient of parking total time and total time is calculated, obtains parking stall utilization rate.It can be with by calculating above-mentioned parking index
So that car owner understands current parking lot daily parking stall service condition in different time periods in one week, so as to reasonably arrange
Travel time and down time.
The embodiment of the present invention whether there is by emitting frequency shift keying fsk signal to parking area to be detected to detect parking stall
Moving vehicle persistently emits frequency shift keying fsk signal and obtains the movable information of vehicle, when or not detecting moving vehicle
There are when moving vehicle, then emits the continuous FMCW signal of frequency modulation to area to be tested and whether there is stationary vehicle to detect parking stall,
When detecting stationary vehicle, then persistently the transmitting continuous FMCW signal of frequency modulation then emits frequency displacement when being detected as empty parking space state
Keying fsk signal, the characteristics of being able to accurately detect moving target and static target using two kinds of waveforms, in parking stall
Emit different waveforms when in different conditions to be detected to parking space state, and then the shape of the acquisition parking stall of fast accurate
State.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present invention constitutes any limit
It is fixed.
Embodiment two
Corresponding to the parking space state detection method in embodiment one, the present embodiment provides a kind of parking space state detection device,
For convenience of description, only the parts related to this embodiment are shown.Referring to Fig. 2, which includes：Transmission
Module 201, parking space state acquisition module 202 and control module 203.
The transmission module 201 receives the first echo for emitting frequency shift keying fsk signal to parking area to be detected
Value；It is additionally operable to the continuous FMCW signal of parking area to be detected transmitting frequency modulation and receives the second Echo Rating.
The parking space state acquisition module 202, for according to first Echo Rating and default snr threshold, obtaining the
One parking space state；It is additionally operable to, according to the second Echo Rating and background return value, obtain the second parking space state.
The control module 203 then continues for being that there are moving vehicles when the first parking space state to parking stall area to be detected
Domain emits frequency shift keying fsk signal and obtains the movable information of moving vehicle；When the first parking space state be there is no moving vehicle,
Then emit the continuous FMCW signal of frequency modulation to parking area to be detected；It is additionally operable to when the second parking space state be that there are stationary vehicles, hold
Continue to parking area to be detected and emits the continuous FMCW signal of frequency modulation；When the second parking space state be empty parking space state, to measuring car to be checked
Position field emission frequency shift keying fsk signal.
Optionally, the control module 203 is additionally operable to when parking stall to be detected is in empty parking space state, to parking stall to be detected
The continuous FMCW signal of field emission frequency modulation obtains background return value.
Optionally, the parking space state acquisition module 202, is specifically used for whether the first Echo Rating for judging to receive is more than in advance
If snr threshold；If more than then the first parking space state is that there are moving vehicles.
Optionally, the parking space state acquisition module 202, is specifically used for whether the second Echo Rating for judging to receive is more than the back of the body
Scape Echo Rating；If more than then the second parking space state is that there are stationary vehicles.
Optionally, the parking space state detection device further includes：Acquisition module, the acquisition module is for obtaining parking stall shape
State information, and the parking space state information is uploaded to server；The parking space state information includes：Parking stall position and not
With the parking space state of time.
Optionally, the parking space state detection device further includes：Analysis module, the analysis module are used for the parking stall
Status information is analyzed, and the parking stall occupancy situation of different periods is obtained.
Parking space state detection device in the present embodiment two can be used for executing parking space state detection method shown in FIG. 1,
It implements principle and may refer to above method embodiment, and details are not described herein again.
Parking space state detection device provided in this embodiment emits frequency displacement key by transmission module to parking area to be detected
Fsk signal is controlled, moving vehicle whether there is to detect parking stall by parking space state acquisition module, when detecting moving vehicle,
Persistently emit frequency shift keying fsk signal by control module and obtain the movable information of vehicle, when there is no moving vehicle, leads to
It crosses control module and emits the continuous FMCW signal of frequency modulation to area to be tested, detect whether parking stall deposits by parking space state acquisition module
In stationary vehicle, when detecting stationary vehicle, then persistently emit the continuous FMCW signal of frequency modulation by control module, when being detected as
When empty parking space state, then frequency shift keying fsk signal is emitted by control module, be able to accurately detect using two kinds of waveforms
The characteristics of moving target and static target, to emit when parking stall is in different conditions different waveforms come to parking space state into
Row detection, and then the state of the acquisition parking stall of fast accurate.
Embodiment three
Fig. 3 is the schematic diagram for the parking space state detection terminal equipment that one embodiment of the invention provides.As shown in figure 3, the reality
The parking space state detection terminal equipment 30 for applying example includes：It processor 300, memory 301 and is stored in the memory 301
And the computer program 302 that can be run on the processor 300, such as obtain the program of parking space state.The processor 300
The step in above-mentioned each parking space state detection method embodiment is realized when executing the computer program 302, such as shown in Fig. 1
Step 101 to 105.Alternatively, the processor 300 realizes above-mentioned each device embodiment when executing the computer program 302
In each module/unit function, such as module 201 to 203 shown in Fig. 2 function.
Illustratively, the computer program 302 can be divided into one or more module/units, it is one or
Multiple module/the units of person are stored in the memory 301, and are executed by the processor 300, to complete the present invention.Institute
It can be the series of computation machine program instruction section that can complete specific function, the instruction segment to state one or more module/units
For describing implementation procedure of the computer program 302 in the parking space state detection terminal equipment 30.For example, the meter
Calculation machine program 302 can be divided into transmission module, parking space state acquisition module and control module, and each module concrete function is such as
Under：
The transmission module receives the first Echo Rating for emitting frequency shift keying fsk signal to parking area to be detected；
It is additionally operable to the continuous FMCW signal of parking area to be detected transmitting frequency modulation and receives the second Echo Rating；
The parking space state acquisition module, for according to first Echo Rating and default snr threshold, obtaining first
Parking space state；It is additionally operable to, according to the second Echo Rating and background return value, obtain the second parking space state；
The control module then continues for being that there are moving vehicles when the first parking space state to parking area to be detected
Transmitting frequency shift keying fsk signal and the movable information for obtaining moving vehicle；When the first parking space state be there is no moving vehicles, then
Emit the continuous FMCW signal of frequency modulation to parking area to be detected；It is additionally operable to when the second parking space state be to continue there are stationary vehicle
Emit the continuous FMCW signal of frequency modulation to parking area to be detected；When the second parking space state be empty parking space state, to parking stall to be detected
Field emission frequency shift keying fsk signal.
The parking space state detection terminal equipment 30 can be desktop PC, notebook, palm PC and high in the clouds clothes
The computing devices such as business device.The parking space state detection terminal equipment may include, but be not limited only to, processor 300, memory 301.
It will be understood by those skilled in the art that Fig. 3 is only the example of parking space state detection terminal equipment 30, do not constitute to parking stall shape
The restriction of state detection terminal equipment 30 may include either combining certain components or not than illustrating more or fewer components
Same component, such as the parking space state detection terminal equipment can also include input-output equipment, network access equipment, bus
Deng.
Alleged processor 300 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), application-specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor can also be any conventional processor
Deng.
The memory 301 can be the internal storage unit of the parking space state detection terminal equipment 30, such as parking stall
The hard disk or memory of status detection terminal equipment 30.The memory 301 can also be the parking space state detection terminal equipment
The plug-in type hard disk being equipped on 30 External memory equipment, such as the parking space state detection terminal equipment 30, intelligent memory card
(Smart Media Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash Card) etc..Into
One step, the memory 301 can also both include the internal storage unit of the parking space state detection terminal equipment 30 or wrap
Include External memory equipment.The memory 301 is for storing the computer program and the parking space state terminal device institute
Other programs and data needed.The memory 301 can be also used for temporarily storing the number that has exported or will export
According to.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each work(
Can unit, module division progress for example, in practical application, can be as needed and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device are divided into different functional units or module, more than completion
The all or part of function of description.Each functional unit, module in embodiment can be integrated in a processing unit, also may be used
It, can also be above-mentioned integrated during two or more units are integrated in one unit to be that each unit physically exists alone
The form that hardware had both may be used in unit is realized, can also be realized in the form of SFU software functional unit.In addition, each function list
Member, the specific name of module are also only to facilitate mutually distinguish, the protection domain being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may realize that lists described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, depends on the specific application and design constraint of technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device/terminal device and method, it can be with
It realizes by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as
Multiple units or component can be combined or can be integrated into another system, or some features can be ignored or not executed.Separately
A bit, shown or discussed mutual coupling or direct-coupling or communication connection can be by some interfaces, device
Or INDIRECT COUPLING or the communication connection of unit, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can be stored in a computer read/write memory medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of flow in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in computer readable storage medium, and the computer program is when being executed by processor, it can be achieved that above-mentioned
The step of each embodiment of the method.Wherein, the computer program includes computer program code, the computer program code
Can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium can
To include：Can carry the computer program code any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic disc,
CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random
Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that the computer
The content that readable medium includes can carry out increase and decrease appropriate according to legislation in jurisdiction and the requirement of patent practice, such as
In certain jurisdictions, according to legislation and patent practice, computer-readable medium does not include electric carrier signal and telecommunication signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to aforementioned reality
Applying example, invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each
Technical solution recorded in embodiment is modified or equivalent replacement of some of the technical features；And these are changed
Or replace, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of parking space state detection method, which is characterized in that including：
Emit frequency shift keying fsk signal to parking area to be detected, receives the first Echo Rating；
According to the first Echo Rating and default snr threshold, the first parking space state is obtained；
If the first parking space state is there are moving vehicle, continue to parking area to be detected transmitting frequency shift keying fsk signal simultaneously
Obtain the movable information of moving vehicle；If the first parking space state is there is no moving vehicle, emit to parking area to be detected
The continuous FMCW signal of frequency modulation simultaneously receives the second Echo Rating；
According to the second Echo Rating and background return value, the second parking space state is obtained；
If the second parking space state is there are stationary vehicle, continue to emit the continuous FMCW signal of frequency modulation to parking area to be detected；If
Second parking space state is empty parking space state, emits frequency shift keying fsk signal to parking area to be detected.
2. parking space state detection method as described in claim 1, which is characterized in that described to emit frequency to parking area to be detected
Keying fsk signal is moved, before receiving the first Echo Rating, further includes：
When parking stall to be detected is in empty parking space state, emits the continuous FMCW signal of frequency modulation to parking area to be detected, obtain the back of the body
Scape Echo Rating.
3. parking space state detection method as described in claim 1, which is characterized in that described according to the first Echo Rating and default letter
It makes an uproar than threshold value, obtains the first parking space state, specifically include：
Judge whether the first Echo Rating received is more than default snr threshold；
If more than then the first parking space state is that there are moving vehicles.
4. parking space state detection method as described in claim 1, which is characterized in that described to be returned according to the second Echo Rating and background
Wave number obtains the second parking space state, specifically includes：
Judge whether the second Echo Rating received is more than background return value；
If more than then the second parking space state is that there are stationary vehicles.
5. parking space state detection method as described in claim 1, which is characterized in that obtain the first parking space state and/or acquisition
After second parking space state, further include：
Parking space state information is obtained, and the parking space state information is uploaded to server；
The parking space state information includes：The parking space state of parking stall position and different time.
6. parking space state detection method as claimed in claim 5, which is characterized in that after the acquisition parking space state information, also
Including：
The parking space state information is analyzed, the parking stall occupancy situation of different periods is obtained.
7. a kind of parking space state detection device, which is characterized in that including：Transmission module, parking space state acquisition module and control mould
Block；
The transmission module receives the first Echo Rating for emitting frequency shift keying fsk signal to parking area to be detected；Also use
In to the parking area to be detected continuous FMCW signal of transmitting frequency modulation and receiving the second Echo Rating；
The parking space state acquisition module, for according to first Echo Rating and default snr threshold, obtaining the first parking stall
State；It is additionally operable to, according to the second Echo Rating and background return value, obtain the second parking space state；
The control module then continues to emit to parking area to be detected for being that there are moving vehicles when the first parking space state
Frequency shift keying fsk signal and the movable information for obtaining moving vehicle；When the first parking space state is that there is no moving vehicles, then to waiting for
It detects parking area and emits the continuous FMCW signal of frequency modulation；It is additionally operable to when the second parking space state be to continue to waiting for there are stationary vehicle
It detects parking area and emits the continuous FMCW signal of frequency modulation；When the second parking space state be empty parking space state, to parking area to be detected
Emit frequency shift keying fsk signal.
8. parking space state detection device as claimed in claim 7, which is characterized in that the control module is additionally operable to when to be detected
When parking stall is in empty parking space state, emits the continuous FMCW signal of frequency modulation to parking area to be detected, obtain background return value.
9. a kind of parking space state detection device, including memory, processor and it is stored in the memory and can be described
The computer program run on processor, which is characterized in that the processor realizes such as right when executing the computer program
It is required that the step of any one of 1 to 6 the method.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, feature to exist
In when the computer program is executed by processor the step of any one of such as claim 1 to 6 of realization the method.
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