CN111028537A - Method for judging use state of parking space, parking lot management method and parking lot management system - Google Patents
Method for judging use state of parking space, parking lot management method and parking lot management system Download PDFInfo
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- CN111028537A CN111028537A CN201911284217.9A CN201911284217A CN111028537A CN 111028537 A CN111028537 A CN 111028537A CN 201911284217 A CN201911284217 A CN 201911284217A CN 111028537 A CN111028537 A CN 111028537A
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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
- G08G1/145—Traffic control systems for road vehicles indicating individual free spaces in parking areas where the indication depends on the parking areas
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/168—Driving aids for parking, e.g. acoustic or visual feedback on parking space
Abstract
The invention provides a method and a device for judging the use state of a parking space, a parking lot management method and a parking lot management system, belongs to the technical field of vehicle parking, and can at least partially solve the problem that the use state of the parking space cannot be obtained by the conventional method. The method for judging the use state of the parking space comprises the following steps: acquiring an observation signal of a signal observer installed on the parking space, and judging whether a vehicle exists in the parking space according to the observation signal; if the parking space is judged to have the vehicle, acquiring an image of the parking space, and judging whether the vehicle is correctly parked according to the image of the parking space; and if the vehicle is judged to be correctly positioned, judging that the use state of the parking space is occupied.
Description
Technical Field
The invention belongs to the technical field of vehicle parking, and particularly relates to a method and a device for judging the use state of a parking space, and a parking lot management method and a parking lot management system.
Background
With the development of economy, the number of motor vehicles has increased substantially. The problem of 'parking difficulty' brought by the method brings much inconvenience to the life of people.
The problem of parking of vehicles is solved in the appearance of large-scale parking area, but because the parking area scope is big, the parking stall is many, the driver often is difficult to confirm the user state in parking stall. Meanwhile, in a parking lot, there is a case where it is difficult for other vehicles to enter an adjacent parking space because the vehicle does not completely enter the parking space.
Disclosure of Invention
The invention at least partially solves the problem that the existing method cannot acquire the use state of a parking space, and provides a method and a device for judging the use state of the parking space, a parking lot management method and a parking lot management system for acquiring the use state of the parking space.
A first aspect of the present invention provides a method for determining a usage status of a parking space, including:
acquiring an observation signal of a signal observer installed on the parking space, and judging whether a vehicle exists in the parking space according to the observation signal;
if the parking space is judged to have the vehicle, acquiring an image of the parking space, and judging whether the vehicle is correctly parked according to the image of the parking space;
and if the vehicle is judged to be correctly positioned, judging that the use state of the parking space is occupied.
Optionally, the signal observer is a frequency domain signal observer, and the determining whether there is a vehicle in the parking space according to the observation signal includes: and judging whether a vehicle exists in the parking space or not according to the peak value of the observation signal.
Optionally, the signal observer is a pressure signal observer, and the determining whether there is a vehicle in the parking space according to the observation signal includes: and judging whether the parking space has a vehicle or not according to the size of the observation signal.
Optionally, the obtaining the image of the parking space and determining whether the vehicle is correctly parked according to the image of the parking space includes: and acquiring a gray image of the parking space, and judging whether the vehicle is correctly parked according to gray values of an edge area and a central area of the gray image, wherein the central area is a rectangular area with a central pixel of the image as a center and an area as a preset value, and other areas except the central area are edge areas.
Optionally, if it is determined that a vehicle is in the parking space and the vehicle in the parking space is not correctly parked, a warning is given.
A second aspect of the present invention provides a parking lot management method, including:
and judging the use states of all the parking spaces of the parking lot in real time by any one of the above methods for judging the use states of the parking spaces and recording the use states.
Optionally, after the determining the use states of all parking spaces of the parking lot, the method further includes: and transmitting the positions and the use states of all parking spaces to vehicles entering the parking lot.
Optionally, after the determining the use states of all parking spaces of the parking lot, the method further includes: and if the use state of the parking space is judged to be occupied, recording the current time.
A third aspect of the present invention provides an apparatus for determining a use state of a parking space, comprising:
the first judgment module is used for acquiring an observation signal of a signal observer installed on the parking space and judging whether a vehicle exists in the parking space according to the observation signal;
the second judgment module is used for receiving the image of the parking space when judging that the vehicle is in the parking space and judging whether the vehicle is correctly parked according to the image of the parking space;
and the third judgment module is used for judging that the parking space is occupied when the vehicle is judged to be correctly parked.
A fourth aspect of the present invention provides a parking lot management system, including:
the device for judging the use state of the parking space;
and the parking space management device is used for receiving and recording the use states of all parking spaces.
According to the method for judging the use state of the parking space, disclosed by the embodiment of the invention, the use state of the parking space can be judged through the observation signal and the image information, and whether a vehicle is correctly parked or not is helped to be judged.
Drawings
FIG. 1a is a graph of the frequency domain characteristics of thermal noise satisfying a Gaussian random distribution;
FIG. 1b is a frequency domain signature of an observed signal of a time-frequency domain signal observer with a vehicle;
fig. 2 is a schematic flowchart illustrating a method for determining a usage status of a parking space according to an embodiment of the present invention;
fig. 3 is a schematic flowchart illustrating another method for determining a usage status of a parking space according to an embodiment of the present invention;
fig. 4 is a schematic flowchart illustrating another method for determining a usage status of a parking space according to an embodiment of the present invention;
fig. 5 is a schematic flowchart of a parking lot management method according to an embodiment of the present invention;
fig. 6 is a block diagram schematically illustrating a device for determining a usage status of a parking space according to an embodiment of the present invention;
fig. 7 is a block diagram schematically illustrating a parking lot management system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
It is to be understood that the specific embodiments and figures described herein are merely illustrative of the invention and are not limiting of the invention.
It is to be understood that the embodiments and features of the embodiments can be combined with each other without conflict.
It is to be understood that, for the convenience of description, only parts related to the present invention are shown in the drawings of the present invention, and parts not related to the present invention are not shown in the drawings.
It should be understood that each unit and module related in the embodiments of the present invention may correspond to only one physical structure, may also be composed of multiple physical structures, or multiple units and modules may also be integrated into one physical structure.
It will be understood that, without conflict, the functions, steps, etc. noted in the flowchart and block diagrams of the present invention may occur in an order different from that noted in the figures.
It is to be understood that the flowchart and block diagrams of the present invention illustrate the architecture, functionality, and operation of possible implementations of systems, apparatus, devices and methods according to various embodiments of the present invention. Each block in the flowchart or block diagrams may represent a unit, module, segment, code, which comprises executable instructions for implementing the specified function(s). Furthermore, each block or combination of blocks in the block diagrams and flowchart illustrations can be implemented by a hardware-based system that performs the specified functions or by a combination of hardware and computer instructions.
It is to be understood that the units and modules involved in the embodiments of the present invention may be implemented by software, and may also be implemented by hardware, for example, the units and modules may be located in a processor.
Example 1:
as shown in fig. 2, the present embodiment provides a method for determining a usage status of a parking space, which includes:
s101, acquiring an observation signal of a signal observer installed in a parking space, and judging whether a vehicle is in the parking space or not according to the observation signal.
A signal observer is installed in a parking space, and a management system (such as a computer) acquires an observation signal of the signal observer and judges whether a vehicle exists in the parking space or not according to the acquired observation signal.
At the moment, whether a vehicle is in the parking space or not is mainly judged, and whether the vehicle is correctly parked or not is not judged, so that the vehicle can still be detected when the vehicle does not completely enter the parking space.
The signal observer is a machine for acquiring a specific signal, the type of the signal observer is not limited, and the acquired signal can be used for judging whether a vehicle is in a parking space.
S102, if the parking space is judged to have the vehicle, obtaining an image of the parking space, and judging whether the vehicle is correctly parked according to the image of the parking space.
If the management system judges that the parking space has no vehicle, the use condition of the parking space can be directly judged to be idle.
If the management system judges that the vehicle is in the parking space according to the observation signal, the image of the parking space is obtained, and the image information can be obtained through a camera device such as a camera arranged in the parking space. And judging whether the vehicle is correctly positioned according to the acquired image of the parking space.
S103, if the vehicle is judged to be correctly parked, the use state of the parking space is judged to be occupied.
And if the management system judges that the vehicle is correctly positioned, judging that the service condition of the parking space is occupied. Correspondingly, the parking space is free when not occupied.
According to the method for judging the use state of the parking space, disclosed by the embodiment of the invention, the use state of the parking space can be judged through the observation signal and the image information, and whether a vehicle is correctly parked or not is helped to be judged.
Example 2:
the embodiment provides a method for judging a use state of a parking space, which specifically comprises the following steps:
s201, acquiring an observation signal of a signal observer installed in a parking space, and judging whether a vehicle is in the parking space or not according to the observation signal.
A signal observer is installed in a parking space, and a management system (such as a computer) acquires an observation signal of the signal observer and judges whether a vehicle exists in the parking space or not according to the acquired observation signal.
Optionally, the signal observer is a frequency domain signal observer, as shown in fig. 3, step S201 is:
s201, acquiring an observation signal of a frequency domain signal observer installed in a parking space, and judging whether a vehicle exists in the parking space according to a peak value of the observation signal.
And installing a frequency domain signal observer on the parking space to obtain an observation signal of the frequency domain signal observer, and monitoring the peak value of the observation signal in real time to judge whether a vehicle is in the parking space.
When the parking space is in an idle state, a constant is observed in all frequency domains by the thermal noise which is received by the frequency domain signal observer and satisfies Gaussian random distribution, and as shown in fig. 1a, the constant value is represented by n; when there is a vehicle in the parking space, a distinct peak will appear in a certain frequency band, as shown in fig. 1b, where the peak is denoted by m. The value of m satisfies m >2n, namely the peak value of the time-frequency domain signal with the vehicle is obvious, and the difference between the peak value and the constant value of the time-frequency domain signal without the vehicle is large. Whether a vehicle is present in the parking space can be determined by the occurrence of the peak value of the acquired frequency domain signal. That is, if the observation signal is no longer constant, but starts to appear a peak value, and the peak value is greatly different from the original constant value, it is highly likely that a vehicle appears in the parking space.
Whether a vehicle exists in the parking space or not is detected through the frequency domain signal, the method is simple to realize, and the difference between the m value and the n value is large, so that the method is easy to distinguish, and the judgment error rate is low.
Optionally, if the signal observer is a pressure signal observer, as shown in fig. 4, step S201 is:
s201, acquiring an observation signal of a pressure signal observer installed in a parking space, and judging whether a vehicle is in the parking space according to the size of the observation signal.
A pressure signal observer is installed on the parking space to obtain an observation signal of the pressure signal observer, and the size of the observation signal is monitored in real time to judge whether a vehicle is in the parking space.
When the parking space is empty, the pressure value observed by the pressure signal observer is substantially zero, but when there is a vehicle, the pressure value observed by the pressure signal observer increases considerably (since the weight of the vehicle is much heavier than other things and people). Namely, the size of the observation signal of the pressure signal observer can be greatly changed when a vehicle is in the parking space and when no vehicle is in the parking space, so that whether the vehicle is in the parking space or not can be judged according to the size of the observation signal. That is, if the value of the observation signal becomes large, it is highly likely that there is a vehicle in the parking space.
The same common-frequency-domain signal observer is easy to realize by detecting whether a vehicle is in a parking space through the pressure signal observer (because the size of the signal is easy to measure and observe), and because the size difference of the observed signal is large when the vehicle is in the parking space, the judgment is easy, and the judgment error rate is low.
If the observation signal of the signal observer is used for judging that no vehicle is on the parking space, the use state of the parking space can be judged to be idle.
If it is determined that there is a vehicle in the parking space based on the observation signal of the signal observer, the process proceeds to step S202.
S202, if the parking space is judged to have the vehicle, obtaining an image of the parking space, and judging whether the vehicle is correctly parked according to the image of the parking space.
If the management system judges that the parking space has no vehicle, the use condition of the parking space can be directly judged to be idle.
If the management system judges that the vehicle is in the parking space according to the observation signal, the image of the parking space is obtained, and the image information can be obtained through a camera device such as a camera arranged in the parking space. And judging whether the vehicle is correctly positioned according to the acquired image of the parking space.
Optionally, acquiring an image of a parking space, and determining whether the vehicle is correctly parked according to the image of the parking space specifically includes: the method comprises the steps of obtaining a gray image of an image of a parking space, and judging whether a vehicle is correctly parked according to gray values of an edge area and a central area of the gray image, wherein the central area is a rectangular area with a central pixel of the image as a center and an area as a preset value, and the other areas except the central area are edge areas.
That is, step S202 may specifically be:
s202, if the parking space is judged to have the vehicle, a gray level image of the parking space is obtained, whether the vehicle is correctly parked is judged according to the gray level values of the edge area and the central area of the gray level image, the central area is a rectangular area with the central pixel of the image as the center and the area as a preset value, and the other areas except the central area are edge areas.
The method comprises the steps of obtaining a color image of a parking space of a vehicle, processing the color image to obtain a gray image or directly obtaining the gray image of the parking space, finding out a central point of the gray image, determining a central area and an edge area according to the central area and the edge area, and judging whether the vehicle is correctly positioned according to the gray values of the central area and the edge area.
When the vehicle is parked correctly, the edge regions including the parking space boundary should all be the ground (no vehicle), and thus the gray values of the pixel points appearing on the image should be uniform. Meanwhile, the central area except the edge area is used for parking the vehicle and is different from the ground, so that the gray value of a pixel point presented on the image is greatly different from the gray value of the edge area, and whether the vehicle is correctly parked or not can be judged according to the gray value of the edge of the gray image and the gray value of the central area. That is, if the vehicle is correctly positioned, the gray-scale values of the edge area are consistent and have a large difference from the gray-scale value of the central area in the gray-scale image.
Since it is intended that the vehicle appears in the central area of the picture when the vehicle is parked correctly, the image taken should be a top view of the parking space and the device for taking the picture should be installed in a more central position.
Of course, for more accurate determination, the result of the image determination may be combined with the result of the signal observer, for example, the image determination indicates that the vehicle is correctly parked, and the signal observer also needs to observe a signal under a certain condition to determine that the vehicle is correctly parked.
The camera is generally installed in the parking lot, so that the image of the parking space is easy to obtain, meanwhile, the comparison and calculation of the gray value of the pixel point are simple, and the comparison and calculation can be quickly realized, so that whether the vehicle is correctly positioned can be judged efficiently according to the gray values of the edge area and the central area of the gray image, and no additional equipment needs to be installed.
And S203, if the vehicle is judged to be correctly parked, judging that the parking space is occupied in the using state.
And if the management system judges that the vehicle is correctly positioned, the use state of the parking space is finally judged to be occupied.
Optionally, step S202, after detecting that there is a vehicle in the parking space, further includes:
and S204, if the parking space is judged to have the vehicle and the vehicle in the parking space is not correctly parked, giving out a warning.
And if the management system judges that the vehicle is in the parking space but the vehicle is not in the parking space correctly, a warning is given.
On the one hand, the system can help the vehicle without equipment for assisting parking, such as a rearview camera, and the like to realize correct parking: the driver can adjust the vehicle position according to the warning without getting off the vehicle. On the other hand, the driver who does not perceive the irregular parking can be reminded to park according to the standard.
According to the method for judging the use state of the parking space, the use state of the parking space can be judged through the observation signals and the image information, whether the vehicle is correctly parked or not is judged, a driver is helped to park correctly, and the parking experience of the driver is improved.
Example 3:
as shown in fig. 5, the present embodiment provides a parking lot management method, which specifically includes:
s301, judging the use states of all parking spaces in the parking lot in real time by any method for judging the use states of the parking spaces and recording the use states.
The management system of the parking lot can judge the use states of all parking spaces in real time through any one of the methods for judging the use states of the parking spaces, and meanwhile, the judgment results are recorded.
The management system in parking area can demonstrate the position in parking stall and the specific position in parking stall after acquireing the user state in parking stall, and the driver of the vehicle that conveniently gets into the parking area selects.
Optionally, after determining the use status of all parking spaces in the parking lot (S301), the method further includes:
s302, transmitting the positions and the use states of all parking spaces to vehicles entering the parking lot.
The management system of the parking lot may actively send the position of the parking space in the parking lot and the corresponding use case to the vehicle (essentially to the driver of the vehicle) after the vehicle enters the parking lot. Of course, for convenience, only the position of the parking space whose use state is free may be transmitted. Or the position of the parking space selected by the driver is transmitted after the driver selects the parking space according to the displayed use condition of the parking lot.
Through the parking stall position and the in service behavior of parking area of sending to the vehicle or the driver of vehicle, make things convenient for the driver to carry out the parking stall and select, improved driver parking efficiency.
Optionally, after determining the use status of all parking spaces in the parking lot (S301), the method further includes:
and S303, if the use state of the parking space is judged to be occupied, recording the current time.
The parking lot management system judges that the parking space is occupied, namely the current parking space is occupied by a vehicle and the vehicle is correctly parked, records the current time as the charging starting time of the vehicle parked in the parking space, and certainly records the information of the vehicle parked in the parking space.
The parking space position can be sent to the driver of the vehicle when the vehicle is parked correctly, namely the using state of the parking space is changed into occupied state, and the driver can conveniently and quickly find the vehicle when leaving.
Similarly, when the vehicle leaves the parking space and the using state of the parking space becomes idle, the time is also recorded and used as the charging ending time of the vehicle parked in the parking space.
And charging can be carried out through the charging starting time and the charging ending time, and the vehicle parking fee is calculated.
When the steps S302 and S303 are performed for the same vehicle, the sequence is sequential, that is, the vehicle needs to enter the parking lot first to receive the positions and the use states of all parking spaces, and then can enter the selected parking space after selection, and after the correct parking is completed, the management system can record the time and start charging.
When steps S302 and S303 are performed for different vehicles, there is no order, and they may occur simultaneously, or S303 occurs first and S302 occurs later. If the vehicle A just enters the parking lot, the positions and the use states of all parking spaces are sent to the driver of the vehicle A, the vehicle B is parked correctly, and the management system starts to record the parking start time.
According to the parking lot management method provided by the embodiment of the invention, the use states of all parking places are judged, so that a vehicle driver can conveniently know the use condition of the parking lot and select the parking places, and the management efficiency of the parking lot is improved.
Example 4:
as shown in fig. 6, the present embodiment provides a device for determining a usage status of a parking space, which specifically includes:
the first judgment module is used for acquiring an observation signal of a signal observer installed on the parking space and judging whether a vehicle exists in the parking space according to the observation signal;
the second judgment module is used for receiving the image of the parking space when judging that the vehicle is in the parking space and judging whether the vehicle is correctly parked according to the image of the parking space;
and the third judgment module is used for judging that the parking space is occupied when the vehicle is correctly parked.
The device for judging the use state of the parking space provided by the embodiment of the invention can judge the use state of the parking space and help to judge whether the vehicle is correctly parked or not through the observation signal and the image information.
Example 5:
as shown in fig. 7, the present embodiment provides a parking lot management system, which specifically includes:
the device for judging the use state of the parking space;
and the parking space management device is used for receiving and recording the use states of all parking spaces.
The parking lot management system provided by the embodiment of the invention judges the use states of all parking places, is convenient for a vehicle driver to know the use condition of the parking lot and select the parking places, and improves the management efficiency of the parking lot.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A method for judging the use state of a parking space is characterized by comprising the following steps:
acquiring an observation signal of a signal observer installed on the parking space, and judging whether a vehicle exists in the parking space according to the observation signal;
if the parking space is judged to have the vehicle, acquiring an image of the parking space, and judging whether the vehicle is correctly parked according to the image of the parking space;
and if the vehicle is judged to be correctly positioned, judging that the use state of the parking space is occupied.
2. The method of claim 1, wherein the signal observer is a frequency domain signal observer, and the determining whether the parking space has a vehicle according to the observation signal comprises:
and judging whether a vehicle exists in the parking space or not according to the peak value of the observation signal.
3. The method of claim 1, wherein the signal observer is a pressure signal observer, and the determining whether the parking space has a vehicle according to the observation signal comprises:
and judging whether the parking space has a vehicle or not according to the size of the observation signal.
4. The method of claim 1, wherein the obtaining the image of the parking space and determining whether the vehicle is correctly parked according to the image of the parking space comprises:
and acquiring a gray image of the parking space, and judging whether the vehicle is correctly parked according to gray values of an edge area and a central area of the gray image, wherein the central area is a rectangular area with a central pixel of the image as a center and an area as a preset value, and other areas except the central area are edge areas.
5. The method of claim 1, wherein a warning is issued if it is determined that a vehicle is in the parking space and the vehicle in the parking space is not properly parked.
6. A parking lot management method, comprising:
the method for judging the use states of the parking spaces according to any one of claims 1 to 5 judges and records the use states of all the parking spaces of the parking lot in real time.
7. The method according to claim 6, wherein the determining the usage status of all parking spaces of the parking lot further comprises:
and transmitting the positions and the use states of all parking spaces to vehicles entering the parking lot.
8. The method according to claim 6, wherein the determining the usage status of all parking spaces of the parking lot further comprises:
and if the use state of the parking space is judged to be occupied, recording the current time.
9. An apparatus for determining a usage status of a parking space, comprising:
the first judgment module is used for acquiring an observation signal of a signal observer installed on the parking space and judging whether a vehicle exists in the parking space according to the observation signal;
the second judgment module is used for receiving the image of the parking space when judging that the vehicle is in the parking space and judging whether the vehicle is correctly parked according to the image of the parking space;
and the third judgment module is used for judging that the parking space is occupied when the vehicle is judged to be correctly parked.
10. A parking lot management system, comprising:
the apparatus for determining a parking space use state according to claim 9;
and the parking space management device is used for receiving and recording the use states of all parking spaces.
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