Parking lot data acquisition, transmission and control system

Abstract

The utility model discloses a parking lot data acquisition, transmission and control system, which comprises a parking lot data acquisition and transmission module and a data monitoring and display module in wireless connection with the parking lot data acquisition and transmission module, an OV5640 front-end acquisition camera acquires a license plate number of a vehicle, a vehicle body full photo is subjected to data preprocessing, efficient caching of video data is achieved, a data caching module adopts a three-level data caching mechanism, the efficient read-write performance of internal FIFO and off-chip DDR2 large-capacity storage are utilized, complementary advantages of the rate and the capacity (time and space) are formed, and the speed and the capacity of the vehicle are greatly improved. The performance requirement of a high-speed image data transmission system for image data transmission is well met, the data is sent to the data monitoring and display module, information of vehicles entering and exiting a parking lot can be recorded, whether the vehicles are correctly parked on parking spaces or not is judged in a point obtaining mode, and the situation that the parking spaces are occupied is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of parking lot data acquisition technology, and in particular relates to a parking lot data acquisition, transmission and control system. Background Technology

[0002] A parking lot is a space used for parking vehicles. Parking lots can be categorized into four types: heated garages, cooled garages, carports, and open-air parking lots. The main tasks of a parking lot are to store parked vehicles and collect parking fees. In parking lot management, the fees charged for parking motor vehicles are called parking fees. Parking fees are collected in various ways, including periodic collection, hourly collection, and per-use collection. Collecting parking fees is the main source of income for professional parking lot management companies.

[0003] With rapid societal development, the number of vehicles is increasing, leading to a growing demand for parking spaces. Despite a limited number of parking spaces, many drivers still park haphazardly, occupying multiple spaces with one vehicle, and without supervision to guide them in proper parking, further reducing the availability of parking spaces. Therefore, measures are needed to prevent the occupation of parking spaces. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a parking lot data acquisition, transmission and control system to address the shortcomings of the prior art. By recording the license plate number information and full vehicle photos of vehicles entering and exiting, and by acquiring points, it can determine whether the vehicle is parked correctly in the parking space, thereby avoiding parking space occupancy.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0006] A parking lot data acquisition, transmission and control system includes a parking lot data acquisition and transmission module, and a data monitoring and display module wirelessly connected to the parking lot data acquisition and transmission module;

[0007] The parking lot data acquisition and transmission module includes a data acquisition module, a multiplexer, a signal preprocessing module, an analog-to-digital converter, a controller module, a wireless transmission module, and a power supply module. The data acquisition module is connected to the controller module sequentially through the multiplexer, the signal preprocessing module, and the analog-to-digital converter. The wireless transmission module and the power supply module are respectively connected to the controller module.

[0008] The data monitoring and display module includes a wireless receiving module, a microcontroller module, a touch screen input and display module, a clock module, a memory module, an interface module, an audible and visual alarm circuit, and a power supply module. The wireless receiving module, microcontroller module, touch screen input and display module, clock module, memory module, interface module, audible and visual alarm circuit, and power supply module are all connected to the microcontroller module.

[0009] As a further preferred embodiment of the parking lot data acquisition, transmission and control system of this utility model, the data acquisition module includes multiple image acquisition modules and data buffer modules connected to them one by one. The data buffer module includes an input FIFO module, a DDR controller, an image parameter calculation module, a DDR2 SDRAM and an output FIFO module. The output end of each image acquisition module is connected to the input end of the input FIFO module. The output end of the input FIFO module is connected to the input end of the DDR2 SDRAM. The output end of the DDR2 SDRAM is connected to the input end of the output FIFO module. The output end of the image parameter calculation module is also connected to the input end of the DDR2 SDRAM through the DDR controller. The output end of the output FIFO module is connected to the input end of the main control module.

[0010] As a further preferred embodiment of the parking lot data acquisition, transmission and control system of this utility model, the image acquisition module uses the OmniVision OV5640 camera, which is a 5-megapixel CMOS image sensor that supports resolutions up to 2K and can output data in various image formats.

[0011] As a further preferred embodiment of the parking lot data acquisition, transmission and control system of this utility model, the signal preprocessing module includes a sensor signal conditioning circuit, a current signal conditioning circuit, a voltage signal conditioning circuit, and a voltage divider follower filter circuit. The multiplexer switch is connected to the controller module in sequence through the sensor signal conditioning circuit, the current signal conditioning circuit, the voltage signal conditioning circuit, and the voltage divider follower filter circuit.

[0012] As a further preferred embodiment of the parking lot data acquisition, transmission and control system of this utility model, the sensor signal conditioning circuit includes an analog signal input terminal, resistors R1 and R2, capacitor C1, and operational amplifier U1. The analog signal input terminal is connected to one end of resistor R1 and one end of resistor R2, the other end of resistor R2 is connected to one end of capacitor C1, the other end of capacitor C1 is connected to the other end of resistor R1 and the positive input terminal of operational amplifier U1, and the negative input terminal of operational amplifier U1 is connected to the output terminal of operational amplifier U1.

[0013] As a further preferred embodiment of the parking lot data acquisition, transmission and control system of this utility model, the voltage signal conditioning circuit includes a voltage signal input terminal, resistors R3, R4, and R5, capacitor C2, and operational amplifier U2. The voltage signal input terminal is connected to one end of resistor R3, the other end of resistor R3 is connected to one end of resistor R4 and one end of resistor R5, the other end of resistor R5 is connected to one end of capacitor C2, the other end of capacitor C2 is connected to the other end of resistor R4 and the positive input terminal of operational amplifier U1, and the negative input terminal of operational amplifier U2 is connected to the output terminal of operational amplifier U2.

[0014] As a further preferred embodiment of the parking lot data acquisition, transmission and control system of this utility model, the voltage divider follower filter circuit includes an operational amplifier U3, resistors R11 and R12, an operational amplifier U4, resistors R13, and a capacitor C7. The output terminal of the operational amplifier U3 is connected to one end of resistor R12, and the other end of resistor R12 is connected to one end of resistor R11 and the positive input terminal of operational amplifier U4. The output terminal of operational amplifier U4 is connected to one end of resistor R13, and the other end of resistor R13 is connected to one end of capacitor C7 and the A / D conversion unit. The other end of capacitor C7 is grounded, and the other end of resistor R11 is connected to the current signal conditioning circuit.

[0015] As a further preferred embodiment of the parking lot data acquisition, transmission and control system of this utility model, the receiving chip of the wireless transmitting and receiving module is nRF905.

[0016] As a further preferred embodiment of the parking lot data acquisition, transmission and control system of this utility model, the multiplexer is model AMC4601.

[0017] As a further preferred embodiment of the parking lot data acquisition, transmission and control system of this utility model, the analog-to-digital conversion module adopts an analog-to-digital converter of model AD7794.

[0018] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0019] This utility model discloses a parking lot data acquisition, transmission, and control system, comprising a parking lot data acquisition and transmission module, and a data monitoring and display module wirelessly connected to the parking lot data acquisition and transmission module. The parking lot data acquisition and transmission module includes a data acquisition module, a multiplexer, a signal preprocessing module, an analog-to-digital converter, a controller module, a wireless transmission module, and a power supply module. The data monitoring and display module includes a wireless receiving module, a microcontroller module, a touchscreen input and display module, a clock module, a memory module, an interface module, an audible and visual alarm circuit, and a power supply module. The system uses an OV5640 front-end camera to acquire vehicle license plate numbers and full-body photos. After data preprocessing, efficient video data caching is achieved. The data caching module employs a three-level data caching mechanism, utilizing the high-efficiency read / write performance of the internal FIFO and the large-capacity external DDR2 storage to achieve a complementary advantage in both speed and capacity (time and space). This effectively meets the performance requirements of high-speed image data transmission systems. The data monitoring and display module records vehicle information entering and exiting the parking lot and determines whether vehicles are correctly parked in parking spaces by acquiring points, thus preventing parking space occupancy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structural principle of a parking lot data acquisition, transmission and control system according to this utility model;

[0021] Figure 2 This is a schematic diagram of the structural principle of the parking lot data acquisition and transmission module of this utility model;

[0022] Figure 3 This is a schematic diagram of the data monitoring and display module of this utility model;

[0023] Figure 4 This is a schematic diagram of the data caching module of this utility model;

[0024] Figure 5 This is a circuit diagram of the sensor signal conditioning circuit of this utility model;

[0025] Figure 6 This is a circuit diagram of the voltage signal conditioning circuit of the present invention;

[0026] Figure 7 This is a circuit diagram of the voltage divider follower filter circuit of the present invention;

[0027] Figure 8 This is a circuit diagram of the wireless transmitting and receiving module of the present invention. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings:

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] A parking lot data acquisition, transmission and control system, such as Figure 1 As shown, it includes a parking lot data acquisition and transmission module, and a data monitoring and display module wirelessly connected to the parking lot data acquisition and transmission module; by recording the license plate number information and full vehicle photos of vehicles entering and exiting, and by acquiring points, it determines whether the vehicle is parked correctly in the parking space, thus avoiding parking space occupation.

[0031] like Figure 2 As shown, the parking lot data acquisition and transmission module includes a data acquisition module, a multiplexer, a signal preprocessing module, an analog-to-digital converter, a controller module, a wireless transmission module, and a power supply module. The data acquisition module is connected to the controller module sequentially through the multiplexer, the signal preprocessing module, and the analog-to-digital converter. The wireless transmission module and the power supply module are respectively connected to the controller module.

[0032] like Figure 3 As shown, the data monitoring and display module includes a wireless receiving module, a microcontroller module, a touch screen input and display module, a clock module, a memory module, an interface module, an audible and visual alarm circuit, and a power supply module. The wireless receiving module, microcontroller module, touch screen input and display module, clock module, memory module, interface module, audible and visual alarm circuit, and power supply module are all connected to the microcontroller module.

[0033] This invention utilizes a 2Gbit DDR2 memory module with eight banks. Since DDR2 read and write operations cannot be performed simultaneously, the DDR2 address bus needs to be time-division multiplexed to improve its data bandwidth utilization. To accommodate image data of different resolutions, an image parameter calculation module is designed to obtain the image data volume and parameters at different resolutions, thus providing a theoretical basis for the redistribution of DDR2 memory space. Furthermore, the redistribution of DDR2 memory space enables convenient management and control of image data.

[0034] The data acquisition module includes multiple image acquisition modules and corresponding data buffer modules, such as... Figure 4As shown, the data buffer module includes an input FIFO module, a DDR controller, an image parameter calculation module, a DDR2 SDRAM, and an output FIFO module. The output of each image acquisition module is connected to the input of the input FIFO module, the output of the input FIFO module is connected to the input of the DDR2 SDRAM, the output of the DDR2 SDRAM is connected to the input of the output FIFO module, the output of the image parameter calculation module is also connected to the input of the DDR2 SDRAM through the DDR controller, and the output of the output FIFO module is connected to the input of the main control module.

[0035] The FIFO module is mainly used to solve the problems of inconsistent data bit width and mismatched data transmission speed between modules. DDR2 is mainly used to meet the requirements of high-speed and large-capacity data caching. The data transmission module uses Gigabit Ethernet to send image data to the host computer software in jumbo frame format for real-time display.

[0036] This utility model's data caching module adopts a three-level data caching mechanism, utilizing the high-efficiency read / write performance of the internal FIFO and the large-capacity external DDR2 storage to form a complementary advantage in speed and capacity (time and space), which well meets the performance requirements of high-speed image data transmission systems for image data transmission.

[0037] The image acquisition module uses an OmniVision OV5640 camera, a 5-megapixel CMOS image sensor supporting resolutions up to 2K and capable of outputting various image formats. This CMOS image sensor supports both DVP and MIPI data interfaces; the DVP interface is selected in this system. Before the main control module acquires data, the sensor register information needs to be configured to the sensor via the SCCB bus. In this system, the CMOS image sensor's image data output format is configured as RGB24, the video resolution as 1920×1080 (Full HD), and the video frame rate as 30 frames per second. This module also includes digital and analog power supply circuits.

[0038] The signal preprocessing module includes a sensor signal conditioning circuit, a current signal conditioning circuit, a voltage signal conditioning circuit, and a voltage divider follower filter circuit. The multiplexer switch is connected to the controller module in sequence through the sensor signal conditioning circuit, the current signal conditioning circuit, the voltage signal conditioning circuit, and the voltage divider follower filter circuit.

[0039] like Figure 5As shown, the sensor signal conditioning circuit includes an analog signal input terminal, resistors R1 and R2, capacitor C1, and operational amplifier U1. The analog signal input terminal is connected to one end of resistor R1 and one end of resistor R2, respectively. The other end of resistor R2 is connected to one end of capacitor C1, and the other end of capacitor C1 is connected to the other end of resistor R1 and the positive input terminal of operational amplifier U1. The negative input terminal of operational amplifier U1 is connected to the output terminal of operational amplifier U1.

[0040] like Figure 6 As shown, the voltage signal conditioning circuit includes a voltage signal input terminal, resistors R3, R4, and R5, capacitor C2, and operational amplifier U2. The voltage signal input terminal is connected to one end of resistor R3. The other end of resistor R3 is connected to one end of resistor R4 and one end of resistor R5. The other end of resistor R5 is connected to one end of capacitor C2. The other end of capacitor C2 is connected to the other end of resistor R4 and the positive input terminal of operational amplifier U1. The negative input terminal of operational amplifier U2 is connected to the output terminal of operational amplifier U2.

[0041] like Figure 7 As shown, the voltage divider follower filter circuit includes operational amplifier U3, resistors R11 and R12, operational amplifier U4, resistor R13, and capacitor C7. The output terminal of operational amplifier U3 is connected to one end of resistor R12. The other end of resistor R12 is connected to one end of resistor R11 and the positive input terminal of operational amplifier U4. The output terminal of operational amplifier U4 is connected to one end of resistor R13. The other end of resistor R13 is connected to one end of capacitor C7 and the A / D conversion unit. The other end of capacitor C7 is grounded. The other end of resistor R11 is connected to the current signal conditioning circuit.

[0042] like Figure 8 As shown, the receiving chip of the wireless transmitting and receiving module is the nRF905. This utility model uses the nRF905, a long-range wireless transceiver chip with multiple transmitting points, long transmission distance, and strong anti-interference capability. It operates in three ISM bands: 433 / 868 / 915MHz, with a switching time between transmitting and receiving modes of less than 650µs. The TRX_CE, PWR_UP, TXEN, CSN, SCK, MISO, and MOSI ports are connected to the microcontroller. CSN, SCK, MISO, and MOSI form an SPI interface. When transmitting data, the nRF905 is set to transmit mode. The microcontroller writes the receiving point address and valid data into the chip's buffer via the SPI interface, then generates a CRC and preamble using the TRX_CE level, and transmits the data. When receiving data, the nRF905 is set to receive mode, waiting for data arrival. Upon receiving the preamble, valid address, and CRC, the data is stored in a register, generating an interrupt for the microcontroller to read.

[0043] Preferably, the multiplexer is an AMC4601, and the analog-to-digital converter module is an AD7794 analog-to-digital converter.

[0044] The interface module uses the SiI9134 as the HDMI output interface chip. In this system, the SiI9134 is selected as the HDMI output interface chip. Before the chip operates, the register information needs to be configured into the chip via the I2C (SCL, SDA) bus. During configuration, the frequency is 100kHz, the data input format is configured as RGB24, and the video output resolution is configured as 1920×1080. CLK is the video data synchronization clock; the clock for this chip's 1080p video format is 148.5MHz. DE is the data valid signal, active high. HS and VS are the horizontal and vertical synchronization signals, respectively. D[23:0] is the RGB24 data input bus, with R, G, and B component data buses arranged from top to bottom. To support other video data formats, the SiI9134 bus width is 36 bits; only 24 bits are used in this system, and the remaining data bus pins are grounded. The SiI9134 supports various digital audio signal input interfaces, including S / PDIF and I2S; however, no audio interface is used in this system. RGB24 format video data is encoded by SiI9134, converted into serial data, and then sent to the monitor through connectors and transmission lines to ultimately display full HD video.

[0045] The controller module uses the Hi3516D chip from HiSilicon, a domestic Chinese company. The main control module of this invention uses the Hi3516D chip from HiSilicon, which receives data from the CMOS image acquisition module through a MIPI manager, performs optimization processing and H.264 encoding compression, and outputs the data to the RS422 communication module through the USRT interface. The chip is triggered by advanced low-power technology and low-power architecture, and uses an ARM Cortex A7 core, with a maximum output capability of 1080P@60fps.

[0046] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A parking lot data acquisition, transmission and control system, characterized in that: It includes a parking lot data acquisition and transmission module, and a data monitoring and display module that is wirelessly connected to the parking lot data acquisition and transmission module; The parking lot data acquisition and transmission module includes a data acquisition module, a multiplexer, a signal preprocessing module, an analog-to-digital converter, a controller module, a wireless transmission module, and a power supply module. The data acquisition module is connected to the controller module sequentially through the multiplexer, the signal preprocessing module, and the analog-to-digital converter. The wireless transmission module and the power supply module are respectively connected to the controller module. The data monitoring and display module includes a wireless receiving module, a microcontroller module, a touch screen input and display module, a clock module, a memory module, an interface module, an audible and visual alarm circuit, and a power supply module. The wireless receiving module, microcontroller module, touch screen input and display module, clock module, memory module, interface module, audible and visual alarm circuit, and power supply module are all connected to the microcontroller module.

2. The parking lot data acquisition, transmission and control system according to claim 1, characterized in that: The data acquisition module includes multiple image acquisition modules and corresponding data buffer modules. The data buffer module includes an input FIFO module, a DDR controller, an image parameter calculation module, a DDR2 SDRAM, and an output FIFO module. The output of each image acquisition module is connected to the input of the input FIFO module. The output of the input FIFO module is connected to the input of the DDR2 SDRAM. The output of the DDR2 SDRAM is connected to the input of the output FIFO module. The output of the image parameter calculation module is also connected to the input of the DDR2 SDRAM through the DDR controller. The output of the output FIFO module is connected to the input of the main control module.

3. The parking lot data acquisition, transmission and control system according to claim 2, characterized in that: The image acquisition module uses the OmniVision OV5640 camera, which is a 5-megapixel CMOS image sensor that supports resolutions up to 2K and can output various image formats.

4. The parking lot data acquisition, transmission and control system according to claim 1, characterized in that: The signal preprocessing module includes a sensor signal conditioning circuit, a current signal conditioning circuit, a voltage signal conditioning circuit, and a voltage divider follower filter circuit. The multiplexer switch is connected to the controller module in sequence through the sensor signal conditioning circuit, the current signal conditioning circuit, the voltage signal conditioning circuit, and the voltage divider follower filter circuit.

5. A parking lot data acquisition, transmission and control system according to claim 4, characterized in that: The sensor signal conditioning circuit includes an analog signal input terminal, resistors R1 and R2, capacitor C1, and operational amplifier U1. The analog signal input terminal is connected to one end of resistor R1 and one end of resistor R2. The other end of resistor R2 is connected to one end of capacitor C1. The other end of capacitor C1 is connected to the other end of resistor R1 and the positive input terminal of operational amplifier U1. The negative input terminal of operational amplifier U1 is connected to the output terminal of operational amplifier U1.

6. A parking lot data acquisition, transmission and control system according to claim 4, characterized in that: The voltage signal conditioning circuit includes a voltage signal input terminal, resistors R3, R4, and R5, capacitor C2, and operational amplifier U2. The voltage signal input terminal is connected to one end of resistor R3. The other end of resistor R3 is connected to one end of resistor R4 and one end of resistor R5. The other end of resistor R5 is connected to one end of capacitor C2. The other end of capacitor C2 is connected to the other end of resistor R4 and the positive input terminal of operational amplifier U1. The negative input terminal of operational amplifier U2 is connected to the output terminal of operational amplifier U2.

7. A parking lot data acquisition, transmission and control system according to claim 4, characterized in that: The voltage divider follower filter circuit includes operational amplifier U3, resistor R11, resistor R12, operational amplifier U4, resistor R13, and capacitor C7. The output terminal of operational amplifier U3 is connected to one end of resistor R12. The other end of resistor R12 is connected to one end of resistor R11 and the positive input terminal of operational amplifier U4. The output terminal of operational amplifier U4 is connected to one end of resistor R13. The other end of resistor R13 is connected to one end of capacitor C7 and the A / D conversion unit. The other end of capacitor C7 is grounded. The other end of resistor R11 is connected to the current signal conditioning circuit.

8. A parking lot data acquisition, transmission and control system according to claim 1, characterized in that: The receiving chip of the wireless transmitting and receiving module is model nRF905.

9. A parking lot data acquisition, transmission and control system according to claim 1, characterized in that: The multiplexer is model AMC4601.

10. A parking lot data acquisition, transmission and control system according to claim 1, characterized in that: The analog-to-digital converter module uses an AD7794 model analog-to-digital converter.

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