CN108961777A - A kind of parking space state monitoring method and device based on earth's magnetic field - Google Patents
A kind of parking space state monitoring method and device based on earth's magnetic field Download PDFInfo
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- CN108961777A CN108961777A CN201810954253.0A CN201810954253A CN108961777A CN 108961777 A CN108961777 A CN 108961777A CN 201810954253 A CN201810954253 A CN 201810954253A CN 108961777 A CN108961777 A CN 108961777A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 28
- 230000005358 geomagnetic field Effects 0.000 claims abstract description 96
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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
This application involves parking stall monitoring technical field more particularly to a kind of parking space state monitoring methods and device based on earth's magnetic field.This method comprises: obtaining the judgement of last time parking space state terminates between current time, the feature geomagnetic field intensity of different time points at parking stall；Remove the interference data in the feature geomagnetic field intensity；Respectively using the first magnetic field strength in feature geomagnetic field intensity and the second magnetic field strength as abscissa and ordinate, according to the acquisition sequence of the feature geomagnetic field intensity, the distance between every two adjacent described feature geomagnetic field intensity is determined；It determines the summation of the distance between every two adjacent described feature geomagnetic field intensity, obtains characteristic parameter；According to the characteristic parameter and a upper parking space state, current parking space state is determined.This method and device monitoring process are simple, and monitoring cost is low, is with a wide range of applications.
Description
Technical field
This application involves parking stall monitoring technical field more particularly to a kind of parking space state monitoring method based on earth's magnetic field and
Device.
Background technique
In recent years, it with the continuous improvement of national economy level, the substantial increase of automobile and is widely used so that parking stall
Quantity also sharply increase therewith.Either private savings parking stall or public parking stall, such as parking lot, for the ease of being supervised to parking stall
Management is superintended and directed, may all whether the state of parking stall vehicle can have been parked, has been monitored.
Currently, a kind of common parking space state monitoring method based on earth's magnetic field by earth's magnetic field monitoring device and surpasses simultaneously
Sound wave monitoring device carries out.Specifically, the earth's magnetic field monitoring device and ultrasonic monitor device are mounted on parking stall, the earth magnetism
Field detecting device is used to detect the variation in earth's magnetic field at parking stall, and the changing value in the earth's magnetic field at the parking stall is more than change threshold
When, then illustrate that the parking stall goes out to have vehicle parking or sail out of.At this point, being monitored on the parking stall using ultrasonic monitor device is
It is no to have vehicle parking, with the state of the current parking stall of determination.
It can be seen that in the above-mentioned methods, individual earth magnetism monitoring device can not directly determine the state of parking stall, it is necessary to
It is monitored by the higher ultrasonic wave of power consumption, causes monitoring process complicated, monitoring cost is higher.
Summary of the invention
The parking space state detection method and device based on earth's magnetic field that this application provides a kind of, to solve existing monitoring method
And device monitoring process is complicated, problem at high cost.
The first aspect of the embodiment of the present application provides a kind of parking space state detection method based on earth's magnetic field, the method packet
It includes:
Obtaining the judgement of last time parking space state terminates between current time, and the feature earth's magnetic field of different time points is strong at parking stall
Degree；Wherein, each described feature geomagnetic field intensity includes first magnetic field strength along the vertical direction and one along parking stall
Second magnetic field strength of length direction；
Remove the interference data in the feature geomagnetic field intensity；
Respectively using first magnetic field strength and second magnetic field strength as abscissa and ordinate, according to the feature
The acquisition sequence of geomagnetic field intensity, determines the distance between every two adjacent described feature geomagnetic field intensity；
It determines the summation of the distance between every two adjacent described feature geomagnetic field intensity, obtains characteristic parameter；
According to the characteristic parameter and a upper parking space state, current parking space state is determined.
The second aspect of the embodiment of the present application provides a kind of parking space state detection device based on earth's magnetic field, the device packet
It includes:
Acquiring unit, obtaining the judgement of last time parking space state terminates between current time, the spy of different time points at parking stall
Expropriation of land magnetic field strength；Wherein, each described feature geomagnetic field intensity includes first magnetic field strength along the vertical direction, and
One the second magnetic field strength along parking stall length direction；
Removal unit, for removing the interference data in the feature geomagnetic field intensity；
First arithmetic element, for as abscissa and being indulged using first magnetic field strength and second magnetic field strength respectively
Coordinate determines between the every two adjacent feature geomagnetic field intensity according to the acquisition sequence of the feature geomagnetic field intensity
Distance；
Second arithmetic element, for determining the summation of the distance between every two adjacent described feature geomagnetic field intensity,
Obtain characteristic parameter；
Determination unit, for determining current parking space state according to the characteristic parameter and a upper parking space state.
Parking space state monitoring method provided by the embodiments of the present application and device, according to the variation feelings of geomagnetic field intensity at parking stall
Condition can determine whether parking space state, and without other auxiliary monitoring devices, monitoring process is simple, and monitoring cost is low, have extensive
Application prospect.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow chart of the parking space state monitoring method based on earth's magnetic field provided by the embodiments of the present application.
Fig. 2 is that feature geomagnetic field intensity provided by the embodiments of the present application obtains flow chart.
Fig. 3 is geomagnetic field intensity schematic diagram provided by the embodiments of the present application.
Fig. 4 is a kind of schematic diagram of the parking space state monitoring device based on earth's magnetic field provided by the embodiments of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Whole description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
Since most of components of vehicle are made of metal, vehicle and its different operating statuses can be over the ground
Magnetic field at table generates large effect, such as stationary vehicle, vehicle movement, touches on the brake, engine sparking.Also, inhomogeneity
The influence that the different motion state of vehicle, the same type vehicle of type generates earth's surface magnetic field is all different.Therefore, the application is real
Example is applied by the monitoring and analysis to earth's surface magnetic field at parking stall, realizes the monitoring to parking space state.In addition, it is necessary to explanation,
In the embodiment of the present application, the unit of geomagnetic field intensity is milligauss, be will not be described in great detail in subsequent content.
Embodiment 1
Referring to Fig. 1, a kind of parking space state monitoring method based on earth's magnetic field provided by the embodiments of the present application, this method packet
Include following steps S101~step S105.
Step S101, obtaining the judgement of last time parking space state terminates between current time, the spy of different time points at parking stall
Expropriation of land magnetic field strength；Wherein, each feature geomagnetic field intensity includes first magnetic field strength along the vertical direction and one
Along the second magnetic field strength of parking stall length direction.
During vehicle gradually drives into and parks to parking stall or during vehicle is sailed out of from parking stall, vehicle is all
The geomagnetic field intensity at the earth's surface of parking stall can be gradually influenced, geomagnetic field intensity is made to generate biggish variation.And when vehicle is at parking stall
After coming to a complete stop, alternatively, vehicle sails out of after parking stall completely, the geomagnetic field intensity at the parking stall influenced by extraneous other factors and
Caused variation will be very faint.
In the embodiment of the present application, the earth's magnetic field monitoring device being installed at parking stall is every by preset time interval, such as
0.05S, 0.1S etc. carry out a detection to the geomagnetic field intensity at parking stall.After a parking space state judgement terminates, work as inspection
The variable quantity for measuring earth's magnetic field at parking stall is greater than after variable quantity threshold value, and the variable quantity within the preset time is less than variation
Measure threshold value when, illustrate vehicle sailed out of parking stall above-mentioned preset time or vehicle on parking stall stablize stop it is above-mentioned
The preset time.At this point, obtaining the judgement of last time parking space state terminates between current time, the feature of different time points at parking stall
Geomagnetic field intensity judges parking space state according to this feature geomagnetic field intensity.Wherein, it should be noted that the preset time root
It is determined according to preparatory configuration, such as 10S, 20S.The variable quantity threshold value is determining also according to preparatory configuration, illustratively, the change
Change amount threshold value can be not limited this for numerical value, the application such as 50-100.
In one possible implementation, referring to Fig. 2, S201~S205 obtains difference at parking stall as follows
The feature geomagnetic field intensity at time point.
Step S201, the preset time interval of every process, obtains current geomagnetic field intensity.
The preset time interval is determined according to preparatory configuration, can be above-mentioned 0.05S or 0.1S etc., or its
His numerical value, the application are not limited this.
Step S202 determines the variable quantity between the current geomagnetic field intensity and the previous geomagnetic field intensity of storage.
Step S203, judges whether the variable quantity is greater than variable quantity threshold value.
Step S204, if the variable quantity is greater than variable quantity threshold value, the geomagnetic field intensity that this is currently acquired is determined as
Feature geomagnetic field intensity, and stored.
Step S205 does not store the geomagnetic field intensity currently acquired if the variable quantity is not more than the variable quantity threshold value.
By the acquisition methods of features described above geomagnetic field intensity, having significant change in all monitoring data can be extracted
Geomagnetic field intensity data, reduce and judge the data bulk of operation for parking space state, in the case where not influencing computational accuracy,
Improve the deterministic process of parking space state.
Step S102 removes the interference data in this feature geomagnetic field intensity.
As shown in the above, the engine factors such as strike sparks, touch on the brake would generally cause at parking stall in a relatively short period of time
Violent variation occurs for the intensity in earth's magnetic field, and is unfixed factor since quantity occurs with occurrence degree in it,
In the present embodiment, feature geomagnetic field intensity caused by it is determined as interfering data, and the interference data is removed.
In one possible implementation, the interference data in this feature geomagnetic field intensity are removed by the following method:
In one group of feature geomagnetic field intensity for judging parking space state, in any three adjacent this feature earth's magnetic fields
In intensity, if the first magnetic field strength of second this feature absolute force is in this three adjacent this feature geomagnetic field intensities
The maximum value or minimum value of all first magnetic field strengths, and the second magnetic field strength and third of first this feature absolute force
The difference of second magnetic field strength of a this feature absolute force is less than difference threshold, then with removing second and third this feature
Magnetic intensity.Alternatively, if the second magnetic field strength of second this feature absolute force is this three adjacent this feature earth's magnetic fields
The maximum value or minimum value of all second magnetic field strengths in intensity, and the first magnetic field strength of first this feature absolute force
It is less than difference threshold with the difference of the first magnetic field strength of third this feature absolute force, then removes second and third should
Feature absolute force.It should be noted that the difference threshold is determined according to preparatory configuration, the application is not limited this.
Illustratively, when the difference threshold is 50, geomagnetic field intensity (200,150) continuous for three, (220,
500) with (230,180), the second magnetic field strength 500 of second this feature absolute force is for three adjacent this feature
The maximum value of all second magnetic field strengths in magnetic field strength, and the first magnetic field strength 200 of first this feature absolute force with
The difference 30 of second magnetic field strength 230 of third this feature absolute force be less than difference threshold 50, therefore, removal second and
Third this feature absolute force.
Step S103, respectively using first magnetic field strength and second magnetic field strength as abscissa and ordinate, according to this
The acquisition sequence of feature geomagnetic field intensity, determines the distance between every two adjacent this feature geomagnetic field intensity.
Illustratively, can join using first magnetic field strength and second magnetic field strength as the coordinate diagram of abscissa and ordinate
See Fig. 3.In Fig. 3, horizontal axis is the first magnetic field strength, and the longitudinal axis is the second magnetic field strength.
In one possible implementation, formula is determined according to distanceIt determines every
The distance between two adjacent this feature geomagnetic field intensities, wherein D is the distance, A1、A2、B1And B2Respectively two adjacent
This feature geomagnetic field intensity the first magnetic field strength and the second magnetic field strength.Determine that formula can be calculated accurately by the distance
The distance between every two adjacent this feature geomagnetic field intensity out improves the judgement precision of subsequent parking space state.
In alternatively possible implementation, in every two adjacent this feature geomagnetic field intensity, determine that two are somebody's turn to do
Second difference of the first difference of the first magnetic field strength and two second magnetic field strengths, by first difference and this second
The distance between difference and determining every two adjacent this feature geomagnetic field intensity.Wherein, first difference and the second difference
Refer both to the absolute value of the difference of two numbers.This method calculates simply, can characterize between two adjacent this feature geomagnetic field intensities
Apart from while, can reduce operand, improve computational efficiency.
Step S104 determines the summation of the distance between every two adjacent this feature geomagnetic field intensity, obtains feature ginseng
Number.
Step S105 determines current parking space state according to this feature parameter and a upper parking space state.
In the embodiment of the present application, can according to this feature parameter and a upper parking space state, determine at current parking stall whether
Vehicle is parked, alternatively, the type currently to park cars at current parking stall is determined, alternatively, determining vehicle parking at current parking stall
Position, it is specific as follows shown in.
According to this feature parameter and a upper parking space state, determine whether parked vehicle at current parking stall, comprising: if should
Characteristic parameter is greater than characteristic parameter threshold, and a upper parking space state is dead ship condition, it is determined that current parking space state is no vehicle shape
State；If this feature parameter is greater than characteristic parameter threshold, and a upper parking space state is car-free status, it is determined that current parking space state
For dead ship condition.If this feature parameter is less than or equal to characteristic parameter threshold, judge without parking space state, and maintain vehicle
The original state of position is constant.Wherein, it should be noted that characteristic parameter threshold is determined according to preparatory statistical result and configuration, is shown
Example property, this feature parameter threshold can be 1000 etc..
According to a parking space state in this feature parameter and this, the type currently to park cars at current parking stall is determined, comprising:
This feature parameter characteristic parameter range corresponding with different vehicle type is compared, determines and currently parks vehicle at current parking stall
Type.
The different types of vehicle of influence due to to(for) earth's magnetic field is different, different vehicles is corresponding with different spies
Levy parameter area.Illustratively, the characteristic parameter range of electric car is 1000-1500, and the characteristic parameter range of car is
1500-2000, the characteristic parameter range of offroad vehicle are 2000-2500.If a upper parking space state is car-free status, and this feature
Parameter is 1800, then explanation has a bridge vehicle to sail out of the parking stall.If a upper parking space state is dead ship condition, and this feature is joined
Number is 2200, then explanation has an offroad vehicle to stop into the parking stall.
According to a parking space state in this feature parameter and this, the position of vehicle parking at current parking stall is determined, comprising: true
After the fixed type of vehicle, this feature parameter characteristic parameter range corresponding with the type of vehicle difference stand is compared
Compared with determining the position of vehicle parking at current parking stall.
The stand of vehicle is different, and the influence to geomagnetic field intensity is also different.When vehicle parking is located proximate to parking stall
Front, the influence to geomagnetic field intensity at parking stall is relatively small, when the position of vehicle parking is rearward to geomagnetic field intensity at parking stall
Be affected.Therefore, in the embodiment of the present application, the different stand of same type of vehicle is corresponding with different features
Parameter area.For example, the forward characteristic parameter range parked of vehicle is 1000-1200 for electric car, vehicle is normally parked
Characteristic parameter range be 1200-1300, the characteristic parameter range that vehicle is parked rearward be 1300-1500.If this feature is joined
Number is 1100, then illustrates that the electric car is forward in the stand of parking stall.
Parking space state monitoring method provided by the embodiments of the present application, according to the situation of change of geomagnetic field intensity at parking stall
Judge parking space state, without other auxiliary monitoring devices, monitoring process is simple, and monitoring cost is low, has a wide range of applications
Prospect.
Embodiment 2
Referring to Fig. 4, the embodiment of the present application provides a kind of parking space state monitoring device based on earth's magnetic field, for executing sheet
Apply for the parking space state monitoring method that embodiment 1 provides, which includes such as lower component.
Acquiring unit 41 terminates for obtaining the judgement of last time parking space state between current time, different time at parking stall
The feature geomagnetic field intensity of point；Wherein, each this feature geomagnetic field intensity includes that first magnetic field along the vertical direction is strong
Degree and second magnetic field strength along parking stall length direction.
Removal unit 42, for removing the interference data in this feature geomagnetic field intensity.
First arithmetic element 43, for respectively using first magnetic field strength and second magnetic field strength as abscissa and vertical seat
Mark determines the distance between every two adjacent this feature geomagnetic field intensity according to the acquisition sequence of this feature geomagnetic field intensity.
Second arithmetic element 44, for determining the summation of the distance between every two adjacent this feature geomagnetic field intensity,
Obtain characteristic parameter.
Determination unit 45, for determining current parking space state according to this feature parameter and a upper parking space state.
Optionally, which is also used to, every to pass through preset time interval, obtains current geomagnetic field intensity；Really
Variable quantity between the fixed current geomagnetic field intensity and the previous geomagnetic field intensity of storage；If the variable quantity is greater than variable quantity
Threshold value, then the geomagnetic field intensity currently acquired this is determined as feature geomagnetic field intensity, and is stored.
Optionally, which is also used to, in any three adjacent this feature geomagnetic field intensities, if second
First magnetic field strength of a this feature absolute force is that all first magnetic fields are strong in this three adjacent this feature geomagnetic field intensities
The maximum value or minimum value of degree, and the second magnetic field strength of first this feature absolute force and third this feature ground magnetic strength
The difference of second magnetic field strength of degree is less than difference threshold, then removes second and third this feature absolute force.Alternatively, such as
Second magnetic field strength of second this feature absolute force of fruit is all second in this three adjacent this feature geomagnetic field intensities
The maximum value or minimum value of magnetic field strength, and the first magnetic field strength of first this feature absolute force and third this feature
The difference of first magnetic field strength of absolute force is less than difference threshold, then removes second and third this feature absolute force.
Optionally, which is also used to, and determines formula according to distance
Determine the distance between every two adjacent this feature geomagnetic field intensity, wherein D is the distance, A1、A2、B1And B2Respectively two
The first magnetic field strength and the second magnetic field strength of a adjacent this feature geomagnetic field intensity.
Optionally, which is also used to, and in every two adjacent this feature geomagnetic field intensity, determines two
Second difference of the first difference of a first magnetic field strength and two second magnetic field strengths by first difference and is somebody's turn to do
The distance between second difference and determining every two adjacent this feature geomagnetic field intensity.
Optionally, which is also used to, and according to a parking space state in this feature parameter and this, determines current parking stall
Whether place has parked vehicle, alternatively, the type currently to park cars at current parking stall is determined, alternatively, determining vehicle at current parking stall
The position parked.
Optionally, which is also used to, if this feature parameter is greater than characteristic parameter threshold, and upper parking stall shape
State is dead ship condition, it is determined that current parking space state is car-free status；If this feature parameter be greater than characteristic parameter threshold, and on
One parking space state is car-free status, it is determined that current parking space state is dead ship condition.
Optionally, which is also used to, by this feature parameter characteristic parameter model corresponding with different vehicle type
It encloses and is compared, determine the type currently to park cars at current parking stall.
Optionally, which is also used to, after determining the type of vehicle, by this feature parameter and the vehicle class
The corresponding characteristic parameter range of type difference stand is compared, and determines the position of vehicle parking at current parking stall.
Parking space state monitoring device provided by the embodiments of the present application, according to the situation of change of geomagnetic field intensity at parking stall
Judge parking space state, without other auxiliary monitoring devices, monitoring process is simple, and monitoring cost is low, has a wide range of applications
Prospect.
It should be noted that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that including the article of a series of elements or equipment not only includes those elements, but also including not having
The other element being expressly recited, or further include for elements inherent to such a process, method, article, or device.Do not having
There is the element limited in the case where more limiting by sentence "including a ...", it is not excluded that in the mistake including the element
There is also other identical elements in journey, method, article or equipment.
The above is only the specific embodiment of the application, is made skilled artisans appreciate that or realizing this Shen
Please.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
It should be understood that the application is not limited to the content being described above, and its model can not departed from
It encloses and carry out various modifications and change.Scope of the present application is only limited by the accompanying claims.
Claims (10)
1. a kind of parking space state monitoring method based on earth's magnetic field, which is characterized in that the described method includes:
Obtaining the judgement of last time parking space state terminates between current time, the feature geomagnetic field intensity of different time points at parking stall；
Wherein, each described feature geomagnetic field intensity includes first magnetic field strength along the vertical direction and one long along parking stall
Spend second magnetic field strength in direction；
Remove the interference data in the feature geomagnetic field intensity；
Respectively using first magnetic field strength and second magnetic field strength as abscissa and ordinate, according to the feature earth magnetism
The acquisition sequence of field intensity, determines the distance between every two adjacent described feature geomagnetic field intensity；
It determines the summation of the distance between every two adjacent described feature geomagnetic field intensity, obtains characteristic parameter；
According to the characteristic parameter and a upper parking space state, current parking space state is determined.
2. the method according to claim 1, wherein the feature earth's magnetic field for obtaining different time points at parking stall is strong
Degree, comprising:
It is every to pass through preset time interval, obtain current geomagnetic field intensity；
Determine the variable quantity between the current geomagnetic field intensity and the previous geomagnetic field intensity of storage；
If the variable quantity is greater than variable quantity threshold value, the current geomagnetic field intensity is determined as feature geomagnetic field intensity,
And it is stored.
3. the method according to claim 1, wherein remove the interference data in the feature geomagnetic field intensity,
Include:
In any three adjacent feature geomagnetic field intensities, if the first magnetic field of second feature absolute force
Intensity is the maximum value or minimum value of all first magnetic field strengths in the described three adjacent feature geomagnetic field intensities, and
Second magnetic field strength of the second magnetic field strength and third the feature absolute force of first feature absolute force
Difference is less than difference threshold, then removes second and the third feature absolute force；
Alternatively, if the second magnetic field strength of second feature absolute force is the described three adjacent feature earth magnetism
The maximum value or minimum value of all second magnetic field strengths in field intensity, and the first magnetic field of first feature absolute force
The difference of first magnetic field strength of intensity and third the feature absolute force is less than difference threshold, then removes second and the
Three feature absolute forces.
4. method according to claim 1-3, which is characterized in that determine the every two adjacent feature earth magnetism
The distance between field intensity, comprising:
Formula is determined according to distanceDetermine the every two adjacent feature geomagnetic field intensity
The distance between, wherein D is the distance, A1、A2、B1And B2The of respectively two adjacent feature geomagnetic field intensities
One magnetic field strength and the second magnetic field strength.
5. method according to claim 1-3, which is characterized in that determine the every two adjacent feature earth magnetism
The distance between field intensity, comprising:
In the every two adjacent feature geomagnetic field intensity, the first difference of two first magnetic field strengths is determined, with
And the second difference of two second magnetic field strengths, by first difference and second difference and determine every two phase
Adjacent the distance between the feature geomagnetic field intensity.
6. the method according to claim 1, wherein being determined according to the characteristic parameter and a upper parking space state
Current parking space state, comprising:
According to the characteristic parameter and a upper parking space state, determine whether parked vehicle at current parking stall, alternatively, determining
The type currently to park cars at current parking stall, alternatively, determining the position of vehicle parking at current parking stall.
7. according to the method described in claim 6, it is characterized in that, according to the characteristic parameter and a upper parking space state,
It determines and whether has parked vehicle at current parking stall, comprising:
If the characteristic parameter is greater than characteristic parameter threshold, and a upper parking space state is dead ship condition, it is determined that current parking stall
State is car-free status；
If the characteristic parameter is greater than characteristic parameter threshold, and a upper parking space state is car-free status, it is determined that current parking stall
State is dead ship condition.
8. according to the method described in claim 6, it is characterized in that, according to the characteristic parameter and a upper parking space state,
Determine the type currently to park cars at current parking stall, comprising:
Characteristic parameter characteristic parameter range corresponding with different vehicle type is compared, is determined current at current parking stall
The type to park cars.
9. according to the method described in claim 8, it is characterized in that, according to the characteristic parameter and a upper parking space state,
Determine the position of vehicle parking at current parking stall, comprising:
After determining the type of vehicle, by characteristic parameter feature corresponding with the type of vehicle difference stand
Parameter area is compared, and determines the position of vehicle parking at current parking stall.
10. a kind of parking space state monitoring device based on earth's magnetic field, which is characterized in that described device includes:
Acquiring unit, obtaining the judgement of last time parking space state terminates between current time, and different time points are characteristically at parking stall
Magnetic field strength；Wherein, each described feature geomagnetic field intensity includes first magnetic field strength along the vertical direction and one
Along the second magnetic field strength of parking stall length direction；
Removal unit, for removing the interference data in the feature geomagnetic field intensity；
First arithmetic element, for respectively using first magnetic field strength and second magnetic field strength as abscissa and vertical seat
Mark determines between the every two adjacent feature geomagnetic field intensity according to the acquisition sequence of the feature geomagnetic field intensity
Distance；
Second arithmetic element is obtained for determining the summation of the distance between every two adjacent described feature geomagnetic field intensity
Characteristic parameter；
Determination unit, for determining current parking space state according to the characteristic parameter and a upper parking space state.
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| CN201810954253.0A CN108961777B (en) | 2018-08-21 | 2018-08-21 | Parking space state monitoring method and device based on geomagnetic field |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109561393A (en) * | 2018-12-24 | 2019-04-02 | 北京全电智领科技有限公司 | A kind of low speed carrier localization method and device based on Space Optical Communication Technologies |
| TWI743521B (en) * | 2019-05-23 | 2021-10-21 | 新加坡商鴻運科股份有限公司 | Parking detecting method, device, and storage medium |
| CN114235013A (en) * | 2021-11-17 | 2022-03-25 | 深圳市凯迪仕智能科技有限公司 | Door lock calibration method, door lock calibration device, door lock and computer storage medium |
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