TW201805898A - License plate detection module and license plate detection method capable of correctly detecting the license plate number of a vehicle parked in a parking space and subsequently applying the data to a parking management system - Google Patents

Abstract

The present invention provides a license plate detection module, which is capable of correctly detecting the license plate number and other data of a vehicle parked in a parking space or a parking area and subsequently applying the data to a parking management system for calculating the parking fee and finding the location of the parking space, so as to provide the functions of power-saving, charging, and so on. At least two radio frequency identification (RFID) tags are arranged on the vehicle at appropriate positions. For example, the RFID tags are respectively arranged at the head end and the tail end of the vehicle, and preferably at positions near the license plate. The RFID tag stores a license plate data associated with the license plate number of the vehicle.

Description

License plate detection module and method

The invention relates to a parking management device and method, particularly to the technical field of identification of license plate data.

In the prior art, parking spaces need to be managed, including those on and off the road, who need to build a license plate image recognition system, or who use a camera to shoot a parking grid to confirm whether there are vehicles parked. However, the aforementioned technology requires complex image recognition technology built into the system. If there are a large number of parking grids to be managed (such as parking grids on both sides of the street), the amount of real-time image recognition data will make the system unloadable.

If the license plate image recognition system is not used, the traditional method is to manually issue a parking ticket and confirm on the spot that there is a vehicle parked in the parking grid (usually by taking pictures and storing a certificate). Although there was a previous technology that put a radio frequency identification (RFID) tag on the vehicle, and a person holding a PDA to read the RFID data instead of typing the license plate number, etc. to issue a parking order, although it can increase the billing speed, it still has to be It is done manually; or there is a previous technology that puts an RFID reader in a street light, etc., to read a wide range of vehicle RFID tags on a street parking grid, but the disadvantage of this technology is that it cannot be confirmed that the vehicle actually stopped In that parking bay, it is also possible to misread a vehicle that is not parked in the parking bay, which may result in missing billing and other errors.

Another method proposed by the prior art is to embed the sensor in the parking slot. When a vehicle is parked on the parking slot, a notification message is sent. The driver uses a smartphone to receive the notification, and then starts to charge after registering the license plate number. However, in this way, when the driver does not actively register the car number, he still needs to rely on manual patrol to open a parking ticket. Or the sensor reads the RFID tag on the vehicle, but it needs to emit high-power radio waves to penetrate the metal car body. This may also cause misreading of RFID tags on neighboring vehicles, which may result in incorrect billing and other defects. Therefore, it is necessary to propose a solution that does not require manual billing, fully automated timekeeping, and can confirm that the vehicle is parked in that parking space.

The invention provides a license plate detection module, which can accurately detect the license plate number and other information of a vehicle parked in a parking space or a parking area, and can subsequently be used by parking management systems to calculate parking fees and find parking space locations, and also take into account power saving. And charging. In a preferred embodiment, at least two radio frequency identification (RFID) tags need to be provided on the vehicle at appropriate positions, for example, at the head end and the tail end of the vehicle, respectively. The preferred position is near the license plate. A license plate information stored in the identification tag is associated with the license plate number of the vehicle.

Each license plate detection module of the present invention further has a unique identification code, and the identification code can correspond to a parking grid or parking area. In this way, when the parking management system receives the identification code sent by a certain license plate detection module and When the license plate number and other information, you can start billing. When the driver is looking for a parking space, he can find a nearby empty parking space through the Internet connection to the parking management system; another driver needs to find a car You can find your own car parked in that parking space or parking area by connecting to the parking management system through the Internet.

Each license plate detection module of the present invention further includes two sets of directional antennas, wherein a first directional antenna detects the radio frequency identification tag in a first direction; a second directional antenna detects the radio frequency identification in a second direction. The radio frequency identification tag, the second direction is different from the first direction; and the license plate data respectively sensed by the first directional antenna and the second directional antenna are compared through a communication module (which may optionally include a processor). And selectively send a parking data to the parking management system. However, if the radio frequency identification tags are consistently provided at the front end (or the rear end) or chassis of the vehicle, then only one set of directional antennas is used, which can still achieve the purpose of the present invention.

10, 20‧‧‧ parking grid

50‧‧‧Front RFID tag

60‧‧‧ Rear RFID Tag

80‧‧‧ License plate detection module

100‧‧‧First pointing antenna

110‧‧‧second pointing antenna

200‧‧‧Gateway

First figure: First embodiment of the present invention

Second figure: Second embodiment of the present invention

Please refer to the first figure for the first embodiment of the present invention, taking the roadside parking grid as an example for illustration. The license plate detection module 80 of the present invention can be installed within a range of 10 parking grids (for example, buried underground) , Or near the parking grid 10 (for example, on a sidewalk near the parking grid 10, etc.). The license plate detection module 80 periodically detects whether there is a vehicle parked in the corresponding parking grid 10. When a vehicle is parked in the parking grid 10, it detects the radio frequency identification (RFID) tag 50 on the front of the vehicle, and the rear of the vehicle. Radio frequency identification tags 60, which are internally divided Do not store a license plate data that is associated with the license plate number of the vehicle. Regardless of whether the license plate detection module 80 detects the license plate data, it can selectively send data to a parking management system. The license plate detection module 80 includes a A first directional antenna 100 detects a radio frequency identification tag 50 in a first direction (shown by a dotted line), and a second directional antenna 110 detects a radio frequency identification tag 60 in a second direction. The second direction Different from the first direction; the license plate detection module 80 includes a communication module (not shown) inside, and compares the license plate data respectively sensed by the first directional antenna 100 and the second directional antenna 110, and selects A parking information is transmitted to the parking management system; each of the license plate detection modules 80 has a unique set of identification codes, and the parking information includes at least the identification code.

Next, an example is used to explain the working principle of the license plate detection module 80. Assume that a vehicle is parked in parking lot 20 at No. 36. The license plate data of the RFID tag 50 on the front of the vehicle is randomly designated as A1234, and the rear radio frequency The license plate information of the identification tag 60 is also designated as A1234, and the number A1234 is assumed to be associated with the license plate number GQ-9827 in the parking management system. The identification number of the license plate detection module 80 corresponding to No. 36 parking grid 20 is Z123456789. Every 5 minutes (or every 1 minute) when the first directional antenna 100 and the second directional antenna 110 are at the first The license plate data A1234 (same) is read in both the first direction and the second direction, and the comparison program in the communication module can presume that the vehicle with the license plate number GQ-9827 is parked in parking lot 20, No. 36. The communication module will include "Z123456789 A parking data including A1234 "is sent to the parking management system. When the parking management system receives the parking data, it starts to calculate the parking fee. License plate detection mode The group 80 may be transmitted to the parking management system by using wired or wireless communication technology, or may be first transmitted to the neighboring gateway 200 and other devices, and then transmitted to the parking management system.

In order to achieve the purpose of power saving, the present invention can selectively transmit data. For example, the program sets a communication module to compare the license plate data respectively sensed by the first directional antenna and the second directional antenna 110 with "same", and the previous comparison When the result is "not the same", the license plate information and the identification code are transmitted to the parking management system. For example, for example, at 10:10, the two sets of license plate data sensed by the license plate detection module 80 corresponding to parking lot 20 at No. 36 are B1234 (belonging to vehicles parked at parking lot 34), and B5678 (being at Vehicles parked in parking grid No. 38), it is judged as "different" at this time, and you can choose not to send data to the parking management system at this time (if you do not consider power saving, you can also choose to only transmit the license plate of parking grid No. 36 The identification code of the detection module 80 to the parking management system); at 10:15, B1234 and A1234 were sensed in the first direction, and B5678 and A1234 were sensed in the second direction. If both directions sense A1234, the comparison result of the communication module is "same". Because the result of the previous comparison is "not the same" and the result of this comparison is "the same", the license plate information and the identification code are transmitted to the parking management system; if the result of the previous comparison and the result of the comparison are "same", then After this comparison, no data is transmitted to the parking management system to save electricity.

When the communication module compares the license plate data sensed by the first directional antenna 100 and the second directional antenna 110 respectively as "different", and the previous comparison When the result is "same", the identification code is transmitted to the parking management system. Another embodiment of the parking information includes an identification code field and a license plate data field. When only the identification code is transmitted, the license plate data field is filled with a null or 0 value. Furthermore, when the communication module judges that the license plate data of the current comparison result is the same as the previous comparison result, it may be set not to send data to the parking management system.

The aforementioned power saving mode is designed for the license plate detection module 80 to only provide power with a battery. If there is a continuous power supply, the license plate detection module 80 can also periodically detect and transmit license plate data. For example, when the license plate detection module 80 includes a rechargeable battery and a wireless charging module, the gateway 200 can use wireless charging technology to emit electromagnetic waves to charge the wireless charging module of the license plate detection module; even via a cable The power line network is connected to the gateway 200.

The gateway 200 of the present invention can be installed at appropriate positions such as street lights, traffic signs, telephone poles, etc. adjacent to a parking space or a parking area. The gateway 200 may further include a reader. When the parking management system receives the license plate information and the identification code, the reader is controlled to periodically read the RFID tag on the vehicle in the parking area. License plate data to confirm that the vehicle is indeed in the parking area, to avoid transmitting wrong data due to the abnormality of the license plate detection module 80.

Please refer to the second figure for a second embodiment of the present invention. The license plate detection module 80 can be placed between two parking spaces. At this time, the first and second directional antennas of the license plate detection module 80 will The license plate data of the two vehicles (respectively the RFID tags on the front and rear of the vehicle) were detected. When the parking management system received the adjacent When comparing the license plate information in the parking information of the two sets of license plate detection modules 80, when two pieces of license plate data are the same, it can be determined according to the identification codes of two adjacent license plate detection modules 80 Parking grid. It is more convenient to place in this position for construction, maintenance, and charging of the wireless charging module of the license plate detection module 80, and transmitting or receiving data is less likely to be covered by the metal casing of the vehicle. The power saving mode in this embodiment may refer to the technical content proposed in this case.

The present invention also proposes a method for detecting license plate data. The method can be written into code and stored in a readable recording medium, and the processor reads the code in the recording medium to execute the process of detecting license plate data. The license plate detection module of the parking grid or parking area is used to detect the license plate data of the vehicle. Two radio frequency identification (RFID) tags set on the vehicle are located at the front and rear positions of the vehicle, and a license plate is stored in the radio frequency identification tag. The data is associated with the license plate number of the vehicle, and each license plate detection module has a unique identification code. The method includes: 1. a detecting step of detecting a radio frequency identification tag in a first direction by using a first pointing antenna, and detecting a radio frequency identification tag in a second direction by using a second pointing antenna, and the second direction is different from the first direction; Direction; 2. a transmitting step, comparing the license plate data respectively sensed by the first directional antenna and the second directional antenna, and selectively transmitting a parking data to the parking management system, the parking data includes an identification code and a license plate data field, The identification code is a non-repeating number associated with a specific parking grid (area) code.

In order to save power, the aforementioned transmission step further includes comparing the first directional antenna and the first The license plate information and the identification code are transmitted to a parking management system only when the license plate information respectively sensed by the two-pointing antenna is "same".

The foregoing transmitting step further includes comparing when the license plate data respectively sensed by the first directional antenna and the second directional antenna is "same", and when the previous comparison result is "not the same", the license plate information and the identification code are transmitted to Parking management system.

The foregoing transmitting step further includes comparing when the license plate data respectively sensed by the first directional antenna and the second directional antenna is "same", and when the previous comparison result is "not the same", the license plate information and the identification code are transmitted to Parking management system.

The aforementioned transmitting step further includes comparing when the license plate data sensed by the first directional antenna and the second directional antenna respectively is "different", not transmitting the data to the parking management system. Or if it is judged that the license plate data of the current comparison result is the same as the previous comparison result, the data is not transmitted to the parking management system

The foregoing transmitting step further includes comparing when the license plate data respectively sensed by the first directional antenna and the second directional antenna is "different", and when the previous comparison result is "same", the transmission is set to be null. Or 0-value license plate information and the identification code to the parking management system.

After receiving the license plate information and identification code transmitted by the license plate detection module, the parking management system can calculate the parking fee for the vehicle parked in the parking zone or parking space. The vehicle can be a car or a locomotive.

The invention can also be applied to a car search system. When the database records the license plate information of a vehicle parked in a parking area and the identification code of the license plate detection module corresponding to the parking area, the car search system is processed by software. After that, a certain The information of the parking area of the vehicle is provided for users to query on the webpage or App.

The invention can also be applied to a parking space search system for recording license plate information of vehicles parked in a parking area and an identification code of the license plate detection module corresponding to the parking area. The parking space search system is processed by software. After that, it will provide real-time information on whether there are vehicles parked in each parking area. Users can check or get suggestions on the webpage or App, and the nearest parking space information.

According to another embodiment of the present invention, according to the vehicle license plate information, a radio frequency identification tag is installed on the vehicle chassis, or a low-power transceiver (powered by the vehicle's own battery) is installed on the vehicle chassis. In the parking area, the radiation direction of the directional antenna of the license plate detection module installed in the parking grid or parking area is roughly aligned with the radio frequency identification tag or low-power transceiver of the vehicle chassis to avoid false detection of non-parking in the parking area. Vehicles in parking bays or parking areas. When the license plate detection module transmits a detection signal, the radio frequency identification tag or low-power transceiver will respond to a license plate data, and the detected license plate data is then transmitted back to the parking management system. The power saving mode in this embodiment may refer to the technical content proposed in this case.

10, 20‧‧‧ parking grid

50‧‧‧Front RFID tag

60‧‧‧ Rear RFID Tag

80‧‧‧ License plate detection module

100‧‧‧First pointing antenna

110‧‧‧second pointing antenna

200‧‧‧Gateway

Claims (13)

A license plate detection module is located in or near a parking area and detects whether there are vehicles parked in the parking area. Each of the license plate detection modules has a unique identification code. When there is a vehicle, Detect at least two radio frequency identification (RFID) tags on the vehicle when parked in the parking area. A license plate information stored in the radio frequency identification tag is associated with the license plate number of the vehicle. Selectively transmitting data to a parking management system, the license plate detection module includes: a first pointing antenna to detect the radio frequency identification tag in a first direction; a second pointing antenna to detect a second direction In the radio frequency identification tag, the second direction is different from the first direction; and a communication module compares the license plate data respectively sensed by the first directional antenna and the second directional antenna, and selectively transmits a parking data To the parking management system, the parking information includes an identification code field and a license plate data field. For example, the license plate detection module of the first patent application scope, when the communication module compares the license plate data respectively sensed by the first directional antenna and the second directional antenna as "same", the license plate information and the license plate are transmitted. Identification code to the parking management system. For example, the license plate detection module of the first patent application scope, when the communication module compares the license plate data respectively sensed by the first directional antenna and the second directional antenna as "same", and the previous comparison result is When it is not the same, the license plate information and the identification code are transmitted to the parking management system. For example, the license plate detection module of the first patent application scope, when the communication module compares the license plate data respectively sensed by the first directional antenna and the second directional antenna as "different", it does not send data to the Parking management system. For example, the license plate detection module of the first patent application scope, when the communication module compares the first pointing When the license plate data sensed by the antenna and the second directional antenna are "different" and the previous comparison result is "same", the license plate data set to be null or 0 is transmitted, and The identification code goes to the parking management system. For example, the license plate detection module of the second patent application scope, when the communication module judges that the license plate data of the current comparison result is the same as the previous comparison result, it does not send data to the parking management system. For example, if the license plate detection module of the third patent scope is applied, when the communication module judges that the license plate data of the current comparison result is the same as the previous comparison result, it will not transmit the data to the parking management system. For example, the license plate detection module in the second patent application range, the parking management system includes a reader disposed adjacent to the parking area, and the parking management system controls the reading after receiving the license plate information and the identification code. The device periodically reads the license plate information in the radio frequency identification tag on the vehicle in the parking area. For example, the license plate detection module of the third patent application range, the parking management system includes a reader disposed adjacent to the parking area, and the parking management system controls the reading after receiving the license plate information and the identification code. The device periodically reads the license plate information in the radio frequency identification tag on the vehicle in the parking area. For example, the license plate detection module for item 7 of the patent application scope, the reader uses a wireless charging technology to emit wireless electromagnetic waves to charge one of the wireless charging modules of the license plate detection module. A parking management system includes a license plate detection module according to any one of claims 1 to 10 for calculating the parking fee of a vehicle parked in a parking area. A car search system comprising a license plate detection module according to any one of claims 1 to 10, It is used to record the license plate information of vehicles parked in a parking area, and the identification code of the license plate detection module corresponding to the parking area. The car search system is processed by software to provide real-time parking of a vehicle. Information on parking areas. A parking space search system includes a license plate detection module according to any one of claims 1 to 10, for recording license plate data of a vehicle parked in a parking area, and the license plate detection mode corresponding to the parking area. The identification code of the group. The software for searching the parking space system provides the data of whether there is a vehicle parked in each parking area immediately after being processed by software.