An electronic license plate device based on Beidou positioning technology

Abstract

The present invention discloses an electronic license plate device based on Beidou positioning technology, which includes an RFID electronic tag, a current detection module, a Beidou positioning module, a battery module, a power supply module, a wireless communication module, a beacon receiving module, and an MCU control module; the current detection module is used to detect the reading current in the RFID electronic tag, and the MCU control module is used to control the working modes of the Beidou positioning module and the beacon receiving module, and send the information fed back by the Beidou positioning module and the beacon receiving module to the wireless communication module in the form of data. In the present invention, the coordinates of the vehicle can be uploaded regularly, facilitating the mastery of the vehicle's position; after the vehicle enters the roadside parking lot, the vehicle information is read through the RFID electronic tag, and the position of the vehicle is judged through beacon detection and positioning coordinates, realizing unmanned parking management; greatly expanding the functions of the electronic license plate and contributing to the popularization and use of the electronic license plate.

Description

Technical Field

[0001] The present invention relates to the field of electronic license plates, and particularly to an electronic license plate device based on Beidou positioning technology. Background Art

[0002] Currently, the existing electronic license plates on the market are usually implemented based on RFID technology. Its basic technical principle is: by utilizing the technical characteristics of high-precision identification, high-accuracy acquisition, and high-sensitivity of RFID, an electronic license plate tag is installed on a motor vehicle. This electronic tag is used as the carrier of vehicle information. When the vehicle passes through a section equipped with an authorized radio frequency identification reader-writer, the data on the motor vehicle electronic license plate can be collected, thereby realizing the comprehensive traffic management of vehicles.

[0003] Compared with traditional optical license plates, electronic license plates have unique advantages, and their functions are not substitutes for each other but complementary. However, the current electronic license plates and optical license plates do not have the capabilities of positioning and actively uploading data, and vehicle-related information can only be read when the vehicle enters a specific identification area, so the scope of use is limited. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an electronic license plate device based on Beidou positioning technology that can be used in a roadside parking charging system.

[0005] The technical solution of the present invention is as follows:

[0006] An electronic license plate device based on Beidou positioning technology includes an RFID electronic tag, a current detection module, a Beidou positioning module, a battery module, a power supply module, a wireless communication module, a beacon receiving module, and an MCU control module; the RFID electronic tag is electrically connected to the current detection module, and the current detection module, the beacon receiving module, the Beidou positioning module, and the wireless communication module are all electrically connected to the MCU control module; the power supply module is electrically connected to the battery module and is used to provide a power supply voltage for each module; the wireless communication module is used for data interaction with the electronic license plate management platform; the vehicle information is stored in the RFID electronic tag; the Beidou positioning module is used to receive satellite information of the Beidou positioning system to realize vehicle positioning and precise timing; the current detection module is used to detect the reading current in the RFID electronic tag, and the MCU control module is used to control the working modes of the Beidou positioning module and the beacon receiving module, and send the information fed back by the Beidou positioning module and the beacon receiving module to the wireless communication module in the form of data.

[0007] Further, the wireless communication module is an NB-IOT module.

[0008] Further, the beacon receiving module is a Bluetooth module with a low-power working mode.

[0009] Further, the power supply module is electrically connected to a solar charging module.

[0010] Further, the MCU control module is electrically connected to a positioning switch. When the MCU control module detects that the positioning switch is closed, it uploads the positioning coordinate information at intervals of a first preset time in the sleep state.

[0011] Further, the MCU control module is electrically connected to an attitude detection module. The MCU control module detects the state of the vehicle through the attitude detection module. When it detects that the vehicle has tipped over or collided, it controls the Beidou positioning module and the wireless communication module to be powered on and work, and uploads the coordinate information and alarm information to the electronic license plate management platform.

[0012] Further, the attitude detection module adopts an intermittent working mode and is in a low-power working mode during the working interval.

[0013] Further, the attitude detection module is provided with an acceleration threshold. The attitude detection module performs real-time acceleration detection. When the detected acceleration is greater than the acceleration threshold, the attitude detection module performs attitude detection.

[0014] Beneficial effects: The present invention sets an MCU control module, a wireless communication module and a Beidou positioning module in the electronic license plate, which can regularly upload the coordinates of the vehicle, facilitating the mastery of the vehicle's position; sets a current detection module and a beacon receiving module, which can perform unmanned parking management when the vehicle enters the roadside parking lot; sets an attitude detection module, which can promptly alarm and seek help when an accident occurs to the vehicle, greatly expanding the functions of the electronic license plate and contributing to the popularization and use of the electronic license plate; moreover, each module adopts a low-power module, with extremely low power consumption and an extremely long standby time, and can achieve uninterrupted operation after the power is supplemented by the solar charging module, which is convenient to use. Description of the Drawings

[0015] Figure 1 It is a structural block diagram of a preferred embodiment of the electronic license plate device based on Beidou positioning technology of the present invention. Detailed Embodiment

[0016] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and make the above-mentioned objects, features and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be further described in detail below with reference to the drawings.

[0017] In the description of the present invention, unless otherwise specified and defined, it should be noted that the term "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two components. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms can be understood according to specific circumstances.

[0018] As Figure 1 shown, a preferred embodiment of the electronic license plate device based on Beidou positioning technology of the present invention includes an RFID electronic tag, a current detection module, a Beidou positioning module, a battery module, a power supply module, a wireless communication module, a beacon receiving module, and an MCU control module.

[0019] The RFID electronic tag is electrically connected to the current detection module. Vehicle information is stored in the RFID electronic tag. The current detection module is used to detect the reading current in the RFID electronic tag. The current detection module, the beacon receiving module, the Beidou positioning module, and the wireless communication module are all electrically connected to the MCU control module.

[0020] The wireless communication module is used to upload data information to the electronic license plate management platform. Preferably, an NB-IOT (Narrow Band Internet of Things) module is used. The NB-IOT module is in a low-power mode when not uploading data, and the power consumption is extremely low. For example, the WH-NB75-BA module can be used, and its power consumption in the low-power mode (PSM mode) is 240 μA.

[0021] The electronic license plate management platform is used to receive the data sent by the electronic license plate through the network and match the received data with the vehicle information sent by the electronic tag reader, so as to combine the received data with the corresponding vehicle information. The electronic license plate management platform is electrically connected to the parking management cloud platform and conducts data interaction. The electronic license plate management platform is also electrically connected to an electronic tag reader and a beacon sending module. The electronic tag reader is set at the entrance of the roadside parking lot and is used to read the data stored in the RFID electronic tag of the electronic license plate. The beacon sending module is set inside the roadside parking lot and is used to send beacon information.

[0022] The beacon receiving module is used to receive the beacon information sent by the beacon sending module. The beacon receiving module and the beacon sending module preferably use a low-power Bluetooth module. For example, the E104-BT5005A module can be used, and its current in the low-power mode (i.e., the sleep mode) is only 6 μA.

[0023] The Beidou positioning module is used to receive satellite information from the Beidou positioning system to achieve vehicle positioning and precise timekeeping. The Beidou positioning module is preferably a module with a low-power mode. For example, the WH-GN100 module can be used. In the low-power mode, the current can be as low as 100 μA.

[0024] The MCU control module is used to control the working modes of the Beidou positioning module and the beacon receiving module, so that the Beidou positioning module and the beacon receiving module are in the low-power mode when not working, saving power consumption; and sending the information fed back by the Beidou positioning module and the beacon receiving module to the wireless communication module in the form of data, and then uploading it to the electronic license plate management platform.

[0025] The MCU control module can determine whether the vehicle is located in the roadside parking lot by whether the beacon receiving module receives beacon information; the MCU control module can also calculate the position of the vehicle relative to the beacon transmitting module according to the signal strength of the beacon information received by the beacon receiving module.

[0026] The MCU control module is also electrically connected to the positioning switch. When the MCU control module detects that the positioning switch is closed, it uploads the positioning coordinate information once every first preset time in the sleep state.

[0027] The MCU control module is also electrically connected to the attitude detection module. The MCU control module can detect the state of the vehicle through the attitude detection module. When it detects that the vehicle has an overturning or impact event, the MCU control module controls the Beidou positioning module and the wireless communication module to power on and work, and uploads the coordinate information and alarm information to the electronic license plate management platform. The attitude detection module is preferably a low-power attitude sensor using an intermittent working mode. For example, the MPU6050 attitude sensor can be used. Its working current in the working mode is 3.6 mA, and its working current in the low-power mode is only 5 μA. The attitude detection module can be set to work once every 1 second, that is, switch from the low-power mode to the working mode once every 1 second, and switch back to the low-power mode after completing an attitude detection in the working mode. Of course, the attitude detection module can also not adopt the intermittent working mode. An acceleration threshold can be set in the attitude detection module, so that the attitude detection module is usually in the low-power mode all the time, only detecting the acceleration, and performing attitude detection only when the acceleration detected by the attitude detection module is greater than the acceleration threshold, so as to save power better.

[0028] The power supply module is electrically connected to the battery module and is used to provide power supply voltage for the current detection module, the Beidou positioning module, the wireless communication module, the beacon receiving module, the attitude detection module and the MCU control module. The power supply module is also electrically connected to a solar charging module for charging the battery module using solar energy.

[0029] The working principle of this embodiment is as follows:

[0030] Before use, install the electronic license plate at the front of the vehicle (for example, inside the front windshield), and bind the electronic license plate and the corresponding vehicle information on the electronic license plate management platform. After that, when the electronic license plate management platform receives the information uploaded by the electronic license plate, it will automatically bind it with the vehicle information. The states of the electronic license plate include the sleep state, the timed detection state, and the emergency alarm state; when the vehicle does not enter the roadside parking lot, the electronic license plate is in the sleep state, and the NB-IOT module, the Beidou positioning module, and the beacon receiving module work in the low-power mode; at this time, the electronic license plate can upload the positioning coordinate information at regular intervals of the first preset time (for example, 15 minutes) to facilitate monitoring the vehicle state. The working process of uploading the positioning coordinate information is as follows:

[0031] The MCU control module makes the Beidou positioning module enter the working mode from the low-power mode. The Beidou positioning module obtains the positioning coordinate information and feeds it back to the MCU control module; then, the MCU control module makes the Beidou positioning module re-enter the low-power mode, and at the same time sends the positioning coordinate information and the vehicle information to the NB-IOT module in the form of data information. After receiving the data information, the NB-IOT module enters the working mode (i.e., the CONNECT mode) from the low-power mode (i.e., the PSM mode), and uploads the data information to the electronic license plate management platform through the mobile network. After the data transmission is completed, when the NB-IOT module detects that the time for it to stop data interaction reaches the preset time (for example, 20 seconds), it automatically enters the PSM mode to save power.

[0032] To meet the needs of some users who are reluctant to upload the positioning coordinates regularly, the MCU control module can also be electrically connected to a positioning switch. If the MCU control module detects that the positioning switch is in the closed state, the electronic license plate uploads the positioning coordinate information regularly in the sleep state; if the MCU control module detects that the positioning switch is in the open state, the electronic license plate stops uploading the positioning coordinate information regularly in the sleep state.

[0033] When the vehicle enters the roadside parking lot, the electronic tag reader at the entrance of the roadside parking lot reads the RFID electronic tag of the electronic license plate on the vehicle, reads the data stored in the RFID electronic tag and uploads it to the electronic license plate management platform; at the same time, the current detection module detects the current signal generated in the RFID electronic tag during the reading process and sends a wake-up signal to the MCU control module. After receiving the wake-up signal, the MCU control module makes the electronic license plate enter the timing detection state from the sleep state; in the timing detection state, the MCU control module detects whether the vehicle is in a stopped state through the attitude detection module. When the time when the vehicle is detected to be in a stopped state reaches the preset time (for example, 1 minute), it is determined that the vehicle has parked in the parking space, and the information that the vehicle is in the parked state is uploaded to the electronic license plate management platform through the NB-IOT module. After receiving this information, the electronic license plate management platform sends it together with the vehicle information bound to the electronic license plate to the parking management cloud platform, and the parking management cloud platform generates a parking order for this vehicle and starts timing. Of course, when the attitude detection module is not set, or when the attitude detection module is set with an acceleration threshold and works in the low-power mode, the electronic license plate management platform can also detect whether the coordinates uploaded for the second time after the vehicle enters the parking lot are within the parking lot range. If they are within the parking lot range, the parking management cloud platform generates a parking order for this vehicle and starts timing.

[0034] In the timing detection state, the electronic license plate uploads the positioning coordinate information once every second preset time (for example, 5 minutes) and performs a parking state detection once. The process of uploading the positioning coordinate information is the same as the process of uploading the positioning coordinate information in the sleep state. The process of a parking state detection is as follows:

[0035] There is a beacon transmission module set in the roadside parking lot for sending Bluetooth beacon information in the parking area. The MCU control module controls the beacon receiving module to enter the working mode from the low-power mode, so that the beacon receiving module receives the beacon information. If the beacon receiving module receives the beacon information, it will feedback the beacon information to the MCU control module. If the beacon information is not received, no information will be feedback to the MCU control module. After that, the beacon receiving module automatically enters the low-power mode. If the MCU control module does not receive the feedback beacon information, it will increment the value of the beacon counter by "1". If it receives the feedback beacon information, it will clear the value of the counter to "0", completing a parking state detection.

[0036] The MCU control module pre-sets a counting threshold, which can be set to "3". Of course, the counting threshold can also be set to "1", "2" or a natural number greater than "3". After completing the detection of the parking state, the MCU control module detects the value of the counter. If the value of the counter is less than "3", the electronic license plate continues to be in the timing detection state. When the value of the counter reaches "3" (that is, when the beacon receiving module fails to receive beacon information three times in a row), the MCU control module determines that the vehicle has left the parking lot, clears the value of the counter to "0", and reports to the electronic license plate management platform through the NB-IOT module that the vehicle has left the field. The electronic license plate management platform sends the information that the vehicle has left the field to the parking management cloud platform. The parking management cloud platform ends the parking order of the vehicle and generates a charging order, notifying the user to pay through an app or other means. After the NB-IOT module reports to the electronic license plate management platform the information that the vehicle has left the field, the electronic license plate resumes the sleep state.

[0037] To more accurately locate the position of the vehicle in the parking lot, three or more beacon transmitting modules can be set in the roadside parking lot. After the MCU control module receives the beacon information fed back by the beacon receiving unit, it also calculates the position of the vehicle relative to the beacon transmitting module based on the signal strength of each received beacon transmitting module, and uploads the calculated position information to the electronic license plate management platform. The electronic license plate management platform can locate the vehicle to a specific parking space based on this position information. Generally, setting three beacon transmitting modules is sufficient to complete the positioning. If you want to further improve the positioning accuracy, you can also set more than three beacon transmitting modules.

[0038] In addition, when a traffic accident occurs to the vehicle, when the MCU control module detects through the attitude detection module that the vehicle has suffered a severe impact or overturned (the acceleration generated during a traffic accident is greater than the acceleration threshold set by the attitude detection module), the electronic license plate enters the emergency alarm state. The MCU control module makes the Beidou positioning module work, obtains the coordinate information and uploads it to the electronic license plate management platform through the NB-IOT module, and at the same time sends an alarm message to the electronic license plate management platform, facilitating the staff of the electronic license plate management platform to verify the vehicle state in time and determine whether rescue is needed.

[0039] The parts not described in this invention are the same as the prior art and will not be elaborated here.

[0040] The above is only the implementation mode of the present invention, and does not limit the patent scope of the present invention accordingly. All equivalent structures made directly or indirectly using the content of the specification and drawings of the present invention in other related technical fields are equally within the patent protection scope of the present invention.

Claims

1. An electronic license plate device based on Beidou positioning technology, characterized in that, It includes an RFID electronic tag, a current detection module, a Beidou positioning module, a battery module, a power supply module, a wireless communication module, a beacon receiving module, and an MCU control module; the RFID electronic tag is electrically connected to the current detection module, and the current detection module, the beacon receiving module, the Beidou positioning module, and the wireless communication module are all electrically connected to the MCU control module; the power supply module is electrically connected to the battery module and is used to provide a power supply voltage for each module; the wireless communication module is used to perform data interaction with the electronic license plate management platform; vehicle information is stored in the RFID electronic tag; the Beidou positioning module is used to receive satellite information of the Beidou positioning system to achieve vehicle positioning and precise timekeeping; the current detection module is used to detect the reading current in the RFID electronic tag and send a wake-up signal to the MCU control module after detecting the current signal generated in the RFID electronic tag. The MCU control module is used to make the electronic license plate enter the timing detection state from the sleep state after receiving the wake-up signal. In the timing detection state, the electronic license plate uploads the positioning coordinate information once every second preset time and performs a parking state detection once. The process of a parking state detection is as follows: The MCU control module controls the beacon receiving module to enter the working mode from the low-power mode, so that the beacon receiving module receives the beacon information. If the beacon receiving module receives the beacon information, it will feedback the beacon information to the MCU control module. If it does not receive the beacon information, it will not feedback information to the MCU control module; then, the beacon receiving module automatically enters the low-power mode. The MCU control module is also used to control the working modes of the Beidou positioning module and the beacon receiving module, and send the information feedback by the Beidou positioning module and the beacon receiving module to the wireless communication module in the form of data.

2. The electronic license plate device based on Beidou positioning technology according to claim 1, wherein The wireless communication module is an NB-IOT module.

3. The electronic license plate device based on Beidou positioning technology according to claim 1, characterized in that The beacon receiving module is a Bluetooth module with a low-power working mode.

4. The electronic license plate device based on Beidou positioning technology according to claim 1, characterized in that, The power supply module is electrically connected to a solar charging module.

5. The electronic license plate device based on Beidou positioning technology according to claim 1, wherein The MCU control module is electrically connected to a positioning switch. When the MCU control module detects that the positioning switch is closed, it uploads the positioning coordinate information once every first preset time in the sleep state.

6. The electronic license plate device based on Beidou positioning technology according to claim 1, wherein The MCU control module is electrically connected to an attitude detection module. The MCU control module detects the state of the vehicle through the attitude detection module. When it detects that the vehicle has an event of tipping or impact, it controls the Beidou positioning module and the wireless communication module to be powered on and work, and uploads the coordinate information and alarm information to the electronic license plate management platform.

7. The electronic license plate device based on Beidou positioning technology according to claim 6, characterized in that, The attitude detection module adopts an intermittent working method, and it is in the low-power working mode during the working interval.

8. The electronic license plate device based on Beidou positioning technology according to claim 6, characterized in that, The attitude detection module is set with an acceleration threshold. The attitude detection module performs acceleration detection in real time. When the detected acceleration is greater than the acceleration threshold, the attitude detection module performs attitude detection.

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