Parking flow monitoring system

Abstract

The invention discloses a parking flow monitoring system, belongs to the technical field of parking flow monitoring, and solves the problems of judging the number of parking spaces actually required in a parking lot and then adjusting the number of parking spaces in the parking lot. Comprising a parking lot information acquisition module, a vehicle data acquisition module and a data processing module, the output ends of the parking lot information acquisition module and the vehicle data acquisition module are both in communication connection with the input end of the data processing module, and the parking lot information acquisition module is used for acquiring real-time parking space data and feeding back the real-time parking space data to the data processing module. The vehicle data acquisition module is used for acquiring in and out vehicle flow data and vehicle type information and feeding back the data to the data processing module. According to the invention, the parking flow in the parking lot can be monitored, then the number of the parking spaces actually required in the parking lot is judged, and then the number of the parking spaces in the parking lot is adjusted, so that the influence of the parking spaces in the parking lot on management investment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of parking flow monitoring, and in particular to a parking flow monitoring system. Background Art

[0002] Parking lots are places that provide parking services for vehicles. They are usually built in crowded areas, such as commercial areas, residential areas, near office buildings, or around some public facilities. They play a vital role in urban transportation, not only providing a safe parking place for vehicles, but also effectively reducing parking chaos on the road. Parking lots can be divided into two forms: indoor and outdoor. Indoor parking lots are generally located underground or between multi-story buildings, which can not only save ground space, but also provide a certain degree of shelter for vehicles to avoid exposure to weather changes. In contrast, outdoor parking lots are usually open, car owners can easily enter and exit, and the construction cost is relatively low. With the advancement of urbanization, the demand for parking has also increased, especially around large commercial centers or office buildings, where parking lots often require higher capacity and more advanced management facilities. Nowadays, with the promotion of the concept of green travel, many new parking lots have begun to add electric vehicle charging facilities to meet the growing needs of electric vehicle users. This not only promotes the popularization of green travel, but also makes travel more diversified and facilitates the parking needs of various car owners. In general, with the development of science and technology and the improvement of environmental awareness, the functions and designs of parking lots are constantly innovating, gradually adapting to the diverse needs of modern urban transportation.

[0003] Among them, the opening of new parking lots near communities needs to follow the requirements of the "Guidelines for Urban Parking Facility Planning". If there is a basic parking space gap in the surrounding areas within 300 meters, the parking construction standards of the project can be appropriately increased and shared with the surrounding areas. In principle, it should not exceed 20% of the standard construction quantity, and the increase in the number of parking spaces should not have a significant impact on the surrounding road traffic.

[0004] Therefore, when converting idle land into parking lots near communities, a certain number of parking spaces will often be set first. The number of parking spaces will follow the requirements of the "Urban Parking Facility Planning Guidelines" and will have certain upper and lower limits.

[0005] Generally speaking, for convenience, when converting idle land into parking lots, the parking lot will often directly set the number of parking spaces to an upper limit. If the number of parking spaces in the parking lot reaches the upper limit, there may be a surplus of parking spaces in the parking lot. The surplus of parking spaces means that there is sufficient parking space, which can effectively alleviate the problem of parking difficulties for car owners. Car owners can quickly find vacant parking spaces when looking for parking spaces, saving a lot of time and energy and improving the convenience of travel. In addition, the surplus parking spaces provide buffer space for temporary parking or emergencies.

[0006] However, an oversupply of parking spaces may also bring about a series of negative effects. If there is a serious oversupply of parking spaces and the actual demand is not so great, many parking spaces will be vacant for a long time, and these excess parking spaces may be used by people to place idle items in the parking lot. At the same time, the parking lot itself also needs to invest staff and equipment to manage the parking spaces in the parking lot. When there is an oversupply of parking spaces and the excess parking spaces are used by people to place idle items, further investment of staff and equipment is needed to manage the parking lot, which will increase the management cost and difficulty of the parking lot.

[0007] On the contrary, if the number of parking spaces in the parking lot is at the lower limit, a series of conflicts and problems will arise due to insufficient parking spaces.

[0008] Therefore, a parking flow monitoring system is needed to monitor the parking flow in the parking lot, determine the actual number of parking spaces required in the parking lot, and then adjust the number of parking spaces in the parking lot to reduce the impact of parking spaces in the parking lot on management investment.

[0009] Therefore, a parking flow monitoring system is proposed to solve or alleviate the above problems. Summary of the invention

[0010] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a parking flow monitoring system.

[0011] In order to achieve the above object, the present invention adopts the following technical solutions:

[0012] A parking flow monitoring system includes a parking lot information collection module, a vehicle data collection module, and a data processing module. The output ends of the parking lot information collection module and the vehicle data collection module are both communicatively connected to the input end of the data processing module. The parking lot information collection module is used to collect real-time parking space data and feed it back to the data processing module. The vehicle data collection module is used to collect in-and-out vehicle flow data and vehicle type information and feed it back to the data processing module. The data processing module is used to predict parking space utilization based on real-time parking space data, vehicle type information, and in-and-out vehicle flow data, and provide a reference for adjusting the final number of parking spaces based on the parking space utilization.

[0013] Preferably, the parking lot information collection module includes a geomagnetic sensor, a controller, and a central processing unit. The number of the geomagnetic sensors is several, and each of the geomagnetic sensors is used to be respectively set on each parking space, and the geomagnetic sensor feeds back a geomagnetic signal after detecting the vehicle. The output ends of the several geomagnetic sensors are coupled to the input end of the controller, the controller receives and summarizes the several geomagnetic signals, the controller is communicatively connected to the central processing unit via a communication protocol, and the central processing unit receives the geomagnetic signal from the controller and generates real-time parking space data.

[0014] Preferably, the parking lot information collection module is used to collect real-time parking space data and feed it back to the data processing module, including the following steps:

[0015] The geomagnetic sensor detects the vehicle and feeds back the geomagnetic signal. The controller collects the geomagnetic signals from various places and transmits them to the central processor.

[0016] The central processor continuously receives the current signal and generates real-time parking space data in a digital manner. The real-time parking space data includes the number of occupied parking spaces at time t and the number of free parking spaces at time t. The number of occupied parking spaces at time t is C occupied (t), the number of free parking spaces at time t is C avai lable (t).

[0017] Preferably, the vehicle data acquisition module includes a license plate recognition camera, a data acquisition processor, and a memory. The number of the license plate recognition cameras is two, and the two license plate recognition cameras are used to be respectively set at the entrance and exit of the parking lot. The license plate recognition camera is used to record the vehicle entry and exit time, the number of vehicles entering and exiting the parking lot, and the license plate image after photographing the vehicle. The output end of the license plate recognition camera is coupled to the input end of the data acquisition processor, and the memory is coupled to the data acquisition processor. The data acquisition processor receives and records the vehicle entry and exit time, the number of vehicles entering and exiting the parking lot and temporarily stores the information. After receiving the license plate image, the data acquisition processor obtains the corresponding vehicle type information through the license plate recognition algorithm.

[0018] Preferably, the vehicle data collection module is used to collect inbound and outbound vehicle flow data and vehicle type information and feed them back to the data processing module, including the following steps:

[0019] The license plate recognition camera captures the license plates of vehicles passing through the entrance and exit of the parking lot, obtains license plate images, and records the vehicle entry and exit time and the number of vehicles entering and leaving the parking lot;

[0020] The data acquisition processor receives and records the vehicle entry and exit time and the number of vehicles entering and leaving the parking lot to obtain the in-and-out vehicle flow data. The in-and-out vehicle flow data is T avg(t), λin(t), λout(t), where λin(t) is the number of vehicles entering the site at time t, λout(t) is the number of vehicles leaving the site at time t, T avg (t) is the average dwelling time of each vehicle in the parking lot;

[0021] The data acquisition processor receives the license plate image and obtains the corresponding vehicle type information through the license plate recognition algorithm. The vehicle type information includes C blue (t), C green (t), and C total , where C blue (t) is the number of blue-plate vehicles entering the parking lot at time t, C green (t) is the number of green-licensed vehicles entering the parking lot at time t, C total The total number of parking spaces in the parking lot.

[0022] Preferably, the data processing module comprises an industrial computer.

[0023] Preferably, the data processing module is used to predict parking space utilization rate according to real-time parking space data, vehicle type information, and in-and-out vehicle flow data, and provide a reference for adjusting the final number of parking spaces according to the parking space utilization rate, including the following steps:

[0024] Receive real-time parking space data, inbound and outbound vehicle flow data and calculate parking space demand D(t) through the parking space demand model;

[0025] The parking space demand D(t) and the total number of parking spaces C total Compare and obtain parking space utilization If the parking space utilization rate U(t) is between 0.6 and 1, the number of parking spaces will remain unchanged. If the parking space utilization rate U(t) is greater than 1, the total number of parking spaces in the parking lot needs to be increased. total To adjust the final number of parking spaces, if the parking space utilization rate U(t) is less than 0.6, the total number of parking spaces in the parking lot needs to be reduced C total To adjust the final number of parking spaces C final .

[0026] Preferably, the parking space demand model is Among them, C type (i, t) and T type (i) is the number of occupied parking spaces and the average dwelling time of different types of vehicles.

[0027] Preferably, the data processing module is used to predict the parking space utilization rate according to the real-time parking space data, vehicle type information, and in-and-out vehicle flow data, and adjust the final number of parking spaces according to the parking space utilization rate, and also includes the following steps:

[0028] When adjusting the final number of parking spaces, check whether the final number of parking spaces will exceed the maximum number of parking spaces in the parking lot C. max Or less than the minimum parking capacity C min If the final number of parking spaces exceeds the maximum parking space capacity C of the parking lot max Or less than the minimum parking capacity C min If the parking lot has a maximum capacity of C max Or the minimum parking space capacity C min As the final number of parking spaces, if the final number of parking spaces does not exceed the maximum number of parking spaces in the parking lot, C max Or less than the minimum parking capacity C min In the case of , the final number of parking spaces output is maintained C final (t) = min(C max , max (C min ,C available (t)+ΔC available (t))), where ΔC available (t) is the dynamic increase or decrease of parking spaces;

[0029] Determine the final number of parking spaces C final Is it increasing, decreasing, or unchanged? If the final number of parking spaces C final If the final number of parking spaces C final is increased, then according to C blue (t) and C green (t) Proportional increase in the final number of parking spaces C final The number of green-card parking spaces in the increase, if the final number of parking spaces C final is reduced, then the final number of parking spaces C final The reductions are all in the number of blue-plate parking spaces.

[0030] Preferably, the dynamic parking space increase or decrease ΔC available The calculation method of (t) comprises the following steps:

[0031] Collect the parking space utilization rate U(t) of the parking lot in different time periods;

[0032] Calculate the parking space utilization rate U(t) and calculate the standard deviation Where N is the number of records of parking space utilization;

[0033] Determine the adjustment factor Among them, α max is the maximum threshold;

[0034] Calculate the dynamic increase or decrease of parking spaces ΔC avai lable(t) = α × (D (t) - C avai lable (t)).

[0035] The present invention has the following beneficial effects:

[0036] The present invention can collect a series of data on the newly opened parking lot, and determine the actual number of parking spaces required, to compare with the current total number of parking spaces, determine the utilization rate of the parking spaces, and then adjust the current total number of parking spaces, or increase the current total number of parking spaces so that the parking lot can create more value and accommodate more cars, or reduce the current total number of parking spaces to reduce the cost and difficulty of parking lot management, so that the number of parking spaces in the parking lot can better meet current needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 It is a structural block diagram of the present invention.

[0039] 1. Parking lot information collection module; 2. Vehicle data collection module; 3. Data processing module. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the invention is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] A parking flow monitoring system, such as Figure 1 The system comprises a parking lot information collection module 1 , a vehicle data collection module 2 , and a data processing module 3 . The output ends of the parking lot information collection module 1 and the vehicle data collection module 2 are both communicatively connected to the input end of the data processing module 3 .

[0047] The parking lot information acquisition module 1 includes a geomagnetic sensor, a controller, and a central processing unit. There are several geomagnetic sensors, and each geomagnetic sensor is used to be set on each parking space respectively. The geomagnetic sensor feeds back a geomagnetic signal after detecting a vehicle. The output ends of the several geomagnetic sensors are coupled to the input end of the controller. The controller receives and summarizes the several geomagnetic signals. The controller is connected to the central processing unit through a communication protocol. The central processing unit receives the geomagnetic signal from the controller and generates real-time parking space data.

[0048] The vehicle data acquisition module 2 includes a license plate recognition camera, a data acquisition processor, and a memory. There are two license plate recognition cameras, which are respectively set at the entrance and exit of the parking lot. The license plate recognition camera is used to record the vehicle entry and exit time, the number of vehicles entering and exiting the parking lot, and the license plate image after photographing the vehicle. The output end of the license plate recognition camera is coupled to the input end of the data acquisition processor, and the memory is coupled to the data acquisition processor. The data acquisition processor receives and records the vehicle entry and exit time, the number of vehicles entering and exiting the parking lot and temporarily stores the information. After receiving the license plate image, the data acquisition processor obtains the corresponding vehicle type information through the license plate recognition algorithm.

[0049] The data processing module 3 includes an industrial computer.

[0050] The parking lot information collection module 1 is used to collect real-time parking space data and feed it back to the data processing module 3. The vehicle data collection module 2 is used to collect in-and-out vehicle flow data and vehicle type information and feed it back to the data processing module 3. The data processing module 3 is used to predict the parking space utilization rate based on the real-time parking space data, vehicle type information, and in-and-out vehicle flow data, and provide a reference for adjusting the final number of parking spaces based on the parking space utilization rate.

[0051] The present invention aims to evaluate the actual parking space demand of a newly established parking lot through comprehensive data collection and analysis. By comparing the total number of existing parking spaces with the actual demand, the present invention can accurately measure the parking space utilization rate and further optimize the parking space configuration.

[0052] If it is found that there are insufficient parking spaces, the system will recommend adding parking spaces to improve the operational value and vehicle accommodating capacity of the parking lot; conversely, if there are excess parking spaces, it will recommend reducing parking spaces to reduce management costs and complexity.

[0053] This dynamic adjustment mechanism ensures that the parking space configuration of the parking lot can flexibly adapt to current parking needs, achieve efficient use of resources and optimal cost management. Through this intelligent parking space management strategy, the parking lot can better serve users while improving operational efficiency and economic benefits.

[0054] Preferably, the parking lot information collection module 1 is used to collect real-time parking space data and feed it back to the data processing module 3, including the following steps:

[0055] The geomagnetic sensor detects the vehicle and feeds back the geomagnetic signal. The controller collects the geomagnetic signals from various places and transmits them to the central processor.

[0056] The central processor continuously receives the current signal and generates real-time parking space data in a digital way. The real-time parking space data includes the number of occupied parking spaces at time t and the number of free parking spaces at time t. The number of occupied parking spaces at time t is C occupied(t), the number of free parking spaces at time t is C avai lable (t).

[0057] Through the above steps, the parking lot information collection module 1 can collect data on the current usage of parking spaces in the parking lot, specifically counting the number of occupied parking spaces and the number of vacant parking spaces, and convert these data into a unified expression to provide to the data processing module 3, thereby reducing the computational burden of the data processing module 3.

[0058] Preferably, the vehicle data collection module 2 is used to collect inbound and outbound vehicle flow data and vehicle type information and feed it back to the data processing module 3, including the following steps:

[0059] The license plate recognition camera captures the license plates of vehicles passing through the entrance and exit of the parking lot, obtains license plate images, and records the vehicle entry and exit time and the number of vehicles entering and leaving the parking lot;

[0060] The data acquisition processor receives and records the vehicle entry and exit time, the number of vehicles entering and leaving the parking lot, and obtains the in-and-out vehicle flow data. The in-and-out vehicle flow data is T avg (t), λin(t), λout(t), where λin(t) is the number of vehicles entering the site at time t, λout(t) is the number of vehicles leaving the site at time t, T avg (t) is the average dwelling time of each vehicle in the parking lot;

[0061] The data acquisition processor receives the license plate image and obtains the corresponding vehicle type information through the license plate recognition algorithm. The vehicle type information includes C blue (t), C green (t), and C total , where C blue (t) is the number of blue-plate vehicles entering the parking lot at time t, C green (t) is the number of green-licensed vehicles entering the parking lot at time t, C total The total number of parking spaces in the parking lot.

[0062] Through the above steps, the system can record the vehicles passing through the entrance and exit of the parking lot, record the vehicle entry and exit time, the number of vehicles entering and exiting the parking lot, and take pictures of their license plates to obtain license plate images. At the same time, based on the above data, it prepares for the subsequent data processing module 3 to calculate.

[0063] Preferably, the data processing module 3 is used to predict the parking space utilization rate according to the real-time parking space data, vehicle type information, and in-and-out vehicle flow data, and provide a reference for adjusting the final number of parking spaces according to the parking space utilization rate, including the following steps:

[0064] Receive real-time parking space data, inbound and outbound vehicle flow data and calculate parking space demand D(t) through the parking space demand model;

[0065] The parking space demand D(t) and the total number of parking spaces C total Compare and obtain parking space utilization If the parking space utilization rate U(t) is between 0.6 and 1, the number of parking spaces will remain unchanged. If the parking space utilization rate U(t) is greater than 1, the total number of parking spaces in the parking lot needs to be increased. total To adjust the final number of parking spaces, if the parking space utilization rate U(t) is less than 0.6, the total number of parking spaces in the parking lot needs to be reduced C total To adjust the final number of parking spaces C final .

[0066] Preferably, the parking space demand model is Among them, C type (i, t) and T type (i) is the number of occupied parking spaces and the average dwelling time of different types of vehicles.

[0067] When adjusting the final number of parking spaces, check whether the final number of parking spaces will exceed the maximum number of parking spaces in the parking lot C. max Or less than the minimum parking capacity C min If the final number of parking spaces exceeds the maximum parking space capacity C of the parking lot max Or less than the minimum parking capacity C min If the parking lot has a maximum capacity of C max Or the minimum parking space capacity C min As the final number of parking spaces, if the final number of parking spaces does not exceed the maximum number of parking spaces in the parking lot, C max Or less than the minimum parking capacity C min In the case of , the final number of parking spaces output is maintained C final (t) = min(C max ,max(C min ,C available (t)+ΔC available (t))), where ΔC available (t) is the dynamic increase or decrease of parking spaces;

[0068] Dynamic parking space increase or decrease ΔC available The calculation method of (t) comprises the following steps:

[0069] Collect the parking space utilization rate U(t) of the parking lot in different time periods;

[0070] Calculate the parking space utilization rate U(t) and calculate the standard deviation Where N is the number of records of parking space utilization;

[0071] Determine the adjustment factor Among them, α max is the maximum threshold;

[0072] Calculate the dynamic increase or decrease of parking spaces ΔC avai lable (t) = α × (D (t) - C avai lable (t));

[0073] Determine the final number of parking spaces C final Is it increasing, decreasing, or unchanged? If the final number of parking spaces C final If the final number of parking spaces C final is increased, then according to C blue (t) and C green (t) Proportional increase in the final number of parking spaces C final The number of green-card parking spaces in the increase, if the final number of parking spaces C final is reduced, then the final number of parking spaces C final The reductions are all in the number of blue-plate parking spaces.

[0074] Through the above steps, the system can give the demand situation of parking spaces in the parking lot and the dynamic increase or decrease of parking spaces, and finally give the final number of parking spaces. Whether it is an increase or decrease, the number of green-plate parking spaces and blue-plate parking spaces in the increase or decrease can be adjusted according to the number of green-plate vehicles and blue-plate vehicles obtained by the system during the actual detection process, so that the number of parking spaces adjusted by the system is more reasonable.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A parking flow monitoring system, characterized in that: The invention comprises a parking lot information collection module (1), a vehicle data collection module (2), and a data processing module (3); the output ends of the parking lot information collection module (1) and the vehicle data collection module (2) are both communicatively connected to the input end of the data processing module (3); the parking lot information collection module (1) is used to collect real-time parking space data and feed it back to the data processing module (3); the vehicle data collection module (2) is used to collect in-and-out vehicle flow data and vehicle type information and feed it back to the data processing module (3); the data processing module (3) is used to predict parking space utilization rate according to the real-time parking space data, vehicle type information, and in-and-out vehicle flow data, and provide a reference for adjusting the final number of parking spaces according to the parking space utilization rate.

2. A parking flow monitoring system according to claim 1, characterized in that: The parking lot information collection module (1) comprises a geomagnetic sensor, a controller, and a central processing unit. The number of the geomagnetic sensors is several, and each of the geomagnetic sensors is used to be respectively arranged on each parking space. The geomagnetic sensor feeds back a geomagnetic signal after detecting a vehicle. The output ends of the several geomagnetic sensors are coupled to the input end of the controller. The controller receives and summarizes the several geomagnetic signals. The controller is connected to the central processing unit through a communication protocol. The central processing unit receives the geomagnetic signal from the controller and generates real-time parking space data.

3. A parking flow monitoring system according to claim 2, characterized in that: The parking lot information collection module (1) is used to collect real-time parking space data and feed it back to the data processing module (3), and comprises the following steps: The geomagnetic sensor detects the vehicle and feeds back the geomagnetic signal. The controller collects the geomagnetic signals from various places and transmits them to the central processor. The central processor continuously receives the current signal and generates real-time parking space data in a digital manner. The real-time parking space data includes the number of occupied parking spaces at time t and the number of free parking spaces at time t. The number of occupied parking spaces at time t is C occupied (t), the number of free parking spaces at time t is C available (t).

4. A parking flow monitoring system according to claim 3, characterized in that: The vehicle data acquisition module (2) comprises a license plate recognition camera, a data acquisition processor, and a memory. The number of the license plate recognition cameras is two, and the two license plate recognition cameras are respectively arranged at the entrance and exit of the parking lot. The license plate recognition camera is used to record the vehicle entry and exit time, the number of vehicles entering and exiting the parking lot, and the license plate image after photographing the vehicle. The output end of the license plate recognition camera is coupled to the input end of the data acquisition processor, and the memory is coupled to the data acquisition processor. The data acquisition processor receives and records the vehicle entry and exit time, the number of vehicles entering and exiting the parking lot, and temporarily stores the information. After receiving the license plate image, the data acquisition processor obtains the corresponding vehicle type information through the license plate recognition algorithm.

5. A parking flow monitoring system according to claim 4, characterized in that: The vehicle data collection module (2) is used to collect inbound and outbound vehicle flow data and vehicle type information and feed it back to the data processing module (3), and comprises the following steps: The license plate recognition camera captures the license plates of vehicles passing through the entrance and exit of the parking lot, obtains license plate images, and records the vehicle entry and exit time and the number of vehicles entering and leaving the parking lot; The data acquisition processor receives and records the vehicle entry and exit time and the number of vehicles entering and leaving the parking lot to obtain the in-and-out vehicle flow data. The in-and-out vehicle flow data is T avg (t), λin(t), λout(t), where λin(t) is the number of vehicles entering the site at time t, λout(t) is the number of vehicles leaving the site at time t, T avg (t) is the average dwelling time of each vehicle in the parking lot; The data acquisition processor receives the license plate image and obtains the corresponding vehicle type information through the license plate recognition algorithm. The vehicle type information includes C blue (t), C green (t), and C total , where C blue (t) is the number of blue-plate vehicles entering the parking lot at time t, C green (t) is the number of green-licensed vehicles entering the parking lot at time t, C total The total number of parking spaces in the parking lot.

6. A parking flow monitoring system according to claim 1, characterized in that: The data processing module (3) comprises an industrial computer.

7. A parking flow monitoring system according to claim 5, characterized in that: The data processing module (3) is used to predict the parking space utilization rate based on the real-time parking space data, vehicle type information, and in-and-out vehicle flow data, and to provide a reference for adjusting the final number of parking spaces based on the parking space utilization rate, and comprises the following steps: Receive real-time parking space data, inbound and outbound vehicle flow data and calculate parking space demand D(t) through the parking space demand model; The parking space demand D(t) and the total number of parking spaces C total Compare and obtain parking space utilization If the parking space utilization rate U(t) is between 0.6 and 1, the number of parking spaces will remain unchanged. If the parking space utilization rate U(t) is greater than 1, the total number of parking spaces in the parking lot needs to be increased. total To adjust the final number of parking spaces, if the parking space utilization rate U(t) is less than 0.6, the total number of parking spaces in the parking lot needs to be reduced C total To adjust the final number of parking spaces C final .

8. A parking flow monitoring system according to claim 7, characterized in that: The parking space demand model is Among them, C type (i, t) and T type (i) is the number of occupied parking spaces and the average dwelling time of different types of vehicles.

9. A parking flow monitoring system according to claim 8, characterized in that: The data processing module (3) is used to predict the parking space utilization rate based on the real-time parking space data, vehicle type information, and in-and-out vehicle flow data, and adjust the final number of parking spaces based on the parking space utilization rate, and also includes the following steps: When adjusting the final number of parking spaces, check whether the final number of parking spaces will exceed the maximum number of parking spaces in the parking lot C. max Or less than the minimum parking capacity C min If the final number of parking spaces exceeds the maximum parking space capacity C of the parking lot max Or less than the minimum parking capacity C min If the parking lot has a maximum capacity of C max Or the minimum parking space capacity C min As the final number of parking spaces, if the final number of parking spaces does not exceed the maximum number of parking spaces in the parking lot, C max Or less than the minimum parking capacity C min In the case of , the final number of parking spaces output is maintained C final (t) = min(C max ,max(C min ,C available (t)+ΔC available (t))), where ΔC available (t) is the dynamic increase or decrease of parking spaces; Determine the final number of parking spaces C final Is it increasing, decreasing, or unchanged? If the final number of parking spaces C final If the final number of parking spaces C final is increased, then according to C blue (t) and C green (t) Proportional increase in the final number of parking spaces C final The number of green-card parking spaces in the increase, if the final number of parking spaces C final is reduced, then the final number of parking spaces C final The reductions are all in the number of blue-plate parking spaces.

10. A parking flow monitoring system according to claim 9, characterized in that: The dynamic parking space increase or decrease ΔC available The calculation method of (t) comprises the following steps: Collect the parking space utilization rate U(t) of the parking lot in different time periods; Calculate the parking space utilization rate U(t) and calculate the standard deviation Where N is the number of records of parking space utilization; Determine the adjustment factor Among them, α max is the maximum threshold; Calculate the dynamic increase or decrease of parking spaces ΔC available (t) = α × (D (t) - C available (t)).

Images