CN111599029A - Simplified parking lot type road side equipment - Google Patents

Abstract

The invention relates to a simplified and practical parking space type roadside device in the field of intelligent transportation and Internet of things, which comprises: the system comprises a processor, a detector, an image sensor assembly, an online data communication interface and an external power supply or solar self-powered management unit; the processor is in wired connection with the detector, the image sensor assembly and the online data communication interface; the processor detects the dynamic change condition of the vehicle entering and exiting the parking space by using the detector and the image sensor assembly, detects and identifies the license plate by using the image sensor assembly, and outputs a comprehensive optimal license plate identification result, a parking space occupation detection result and a picture required for evidence obtaining and filing after the processing is finished; the embodiment of the invention can be flexibly deployed according to local conditions, can prolong the endurance time of products, reduce operation and maintenance cost, reduce faults and misjudgments, ensure that equipment can reliably work for a long time, and can be adapted to various urban intelligent parking application scenes.

Description

A simplified parking space type roadside equipment

technical field

The invention relates to a road information equipment in the field of intelligent traffic and the Internet of Things, in particular to a simplified and practical parking space type roadside equipment.

Background technique

In recent years, with the increasing living standards of citizens, the number of motor vehicles has grown rapidly, but the number of parking spaces is unevenly distributed, the number of parking spaces in areas with high traffic flow is small, and the shortage of public parking lots has forced a large number of motor vehicles to flock to the road. Occupy roads and park indiscriminately, causing traffic congestion and the urban environment into a vicious circle. How to use intelligent and automated technology to improve the static traffic environment, improve the level of urban management, and effectively help and solve problems such as difficulty in finding parking spaces under relatively limited parking space resources has become a strong public response, and government departments at all levels are very concerned about it. hot topics.

At present, in the promotion and implementation of smart parking informatization projects, there are prominent problems in the scene adaptation and effective integration of vehicle automatic identification technology and parking space detection technology, mainly as follows: 1. The existing new patent "a parking space type roadside equipment" "(Authorization Announcement No.: CN 206574141 U) and "A Parking Electronic Toll Collection System Component" (Authorization Announcement No.: CN206557856 U) The technical solutions disclosed are more focused on using radio frequency communication means from the national standard ETC vehicle-mounted unit, the national standard electronic License plate RFID or car owner Mkey, etc. to obtain charging information to carry out business activities, often encounter two prominent problems in specific practice, one is that there is currently an optional data interface alternative without deploying a security access module, the first; second, Radio frequency communication equipment generally needs to be erected on poles, but some places have questioned or even denied it on the grounds that it affects the appearance of the city. Video recognition technology is much more flexible, and it is not necessary to change the pole to a user-acceptable installation method. Matching algorithms and training parameters can effectively obtain license plate parking space information and provide business input, but can be favored and adopted. That is to say, under certain circumstances, video recognition technology can independently undertake the task of data collection; 2. The power supply mode of existing video recognition products is based on Mains power supply or external replaceable batteries are the main ones. The former requires a lot of civil engineering and engineering wiring work, and it is also difficult to coordinate across departments, while the latter requires a longer project implementation time due to many product losses and more investment in operation and maintenance. Both of them are not conducive to the large-scale promotion and application of the product; 3. Before and after the implementation of the existing video recognition products, the understanding of the severity of the site environment is insufficient, and the preventive measures are not in place, which cannot prevent the interference and pollution of cement sand and dust, and the frequent failures and misjudgments are serious. Manual intervention is necessary, and the effect of project implementation is greatly reduced. All of the above-mentioned problems need to be overcome and improved urgently, and the existing technical solutions need to be simplified, optimized and improved.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to avoid the shortcomings of the above-mentioned prior art and propose a simplified parking space type roadside equipment. The specific scheme is:

Design and use a simplified parking space type roadside equipment, including: a processor, a detector, an image sensor component, an online data communication interface, an external power supply or a solar self-power supply management unit; the processor and the detector, all The image sensor assembly and the online data communication interface are connected by wire; the external power supply or solar self-power supply management unit is electrically connected with other electrical components in the roadside equipment; the processor uses the detector and the The image sensor component detects the dynamic changes of the vehicle entering and exiting the parking space, uses the image sensor component to detect and recognize the license plate, and outputs the comprehensive optimal license plate recognition result, the parking space occupancy detection result and the pictures required for forensic filing after the processing is completed.

As an improvement of the present invention, the roadside equipment further includes: a microwave radio frequency communicator and its transceiver antenna; the microwave radio frequency communicator and its transceiver antenna are used for the processor and external equipment, vehicle detector, national standard ETC on-board unit OBU and/or national standard electronic license plate RFID for air data transmission, real-time authentication, encrypted communication or communication connection components for completing financial transactions, including: one or more of 5.8GHz, 300-928MHz specific frequency band, and 2.4GHz The combined wireless communication device and its supporting transceiver antenna include: a transceiver, a transceiver and wake-up device, or a specific wireless communication protocol processor.

As an improvement of the present invention, the simplified parking space type roadside equipment further includes: a supplementary light and a control unit thereof; the supplementary light and its control unit are illumination lights composed of visible light LEDs or infrared light LEDs and its drive control circuit.

As an improvement of the present invention, the simplified parking space type roadside equipment further includes: a shutter in the image sensor assembly is arranged outside the transparent window for image viewing to block water and dust.

Further, the processor refers to a combination of one or more of a microprocessor, a single-core or multi-core DSP digital signal processor, and an ARM processor.

The detector is a kind of device installed inside or outside the roadside equipment, which can detect and judge the existence and/or moving direction of a specific target, and provide relevant result information to the processor through wired or wireless connection. In order to realize the functional components of environmental protection, energy saving and accurate control; the wireless connection must meet the prerequisite that the detector can communicate with the microwave radio frequency communicator or the online data communication interface; the detector includes: geomagnetic detection detector, infrared detector, ultrasonic detector, microwave detector or coil ground sensing; the microwave detector, a radar ranging module, is a device that works in the 24GHz or 77GHz frequency band and can measure the distance of short-range target objects. Special parts for antenna and microwave signal processing part and intermediate frequency signal processing part.

Further, the antenna and microwave signal processing part of the above-mentioned radar ranging module are 24GHz or 77GHz radar ranging sensors; the intermediate frequency signal processing part of the above-mentioned radar ranging module can complete the target distance calculation by the processor through the interface, Or output the result to the processor after completing the target distance calculation through the built-in MCU.

The image sensor assembly is a general term for a series of components that output the optical image from the lens through the image sensor and its supporting circuits as the signal required by the processor to collect the image; the image sensor includes: CCD or CMOS image sensor .

The online data communication interface refers to an external connection interface for networking communication between the processor and external equipment, back-end systems, etc., including: wired and/or wireless data communication interfaces, and the wired data communication interfaces include UART, USB or TCP/IP network interface; the wireless data communication interface includes: NB-IOT, LPWAN, GPRS/3G/4G/5G, WiFi, Bluetooth, ANT, ZigBee or wireless network communication components of specific protocols and their supporting transceivers antenna.

The external power supply management unit or the solar self-power supply management unit refers to that the roadside equipment uses an external power supply management unit, or uses the solar energy self-power supply management unit to supply power to each internal load; the external power supply management unit refers to the use of commercial power. power supply, or use an external large-capacity lithium battery to supply power to the equipment; the solar self-power supply management unit refers to a dedicated circuit that uses solar energy to charge the internal energy storage device so as to continuously supply power to each internal load, including: a voltage regulator circuit, One or more groups of solar panels, energy collection chips, energy storage devices, and diodes connected in series in sequence; in each group, the input end of the energy collection chip is wired to the solar panel, and the output end is connected to the energy storage device The input end of the device is connected by wire, the input end of the diode is connected by wire to the output end of the energy storage device, the output end is connected by wire to the input end of the voltage stabilizer circuit, and the output end of the voltage stabilizer circuit is connected by wire to the output end of the energy storage device. The internal loads of the parking space roadside equipment are electrically connected; the solar panel is a monocrystalline silicon, polycrystalline silicon or amorphous silicon solar panel; the energy collection chip has MPPT maximum power point tracking and control functions, and has micro Watt-level energy collection capability and low power consumption characteristics; the energy storage device is a battery capacitor, a super capacitor, a composite capacitor, a rechargeable lithium battery or a thin film battery.

Compared with the prior art, a simplified parking space type roadside equipment of the present invention has the following technical effects: 1. Using the optional data interface alternative to reduce the security access module can significantly improve the service processing speed and reduce the equipment function; At the same time, according to the situation, the information collection part of the radio frequency communication charging requirements that do not have the conditions for on-site implementation can be reduced, and the video parking space license plate detection and recognition technology that can accurately adapt to the business scenario can be adopted instead, which can better meet the project needs. , greatly reducing the difficulty of product promotion and implementation; 2. In the selection of power supply solutions, flexible and diverse options are available, and solar charging solutions can be optionally added to greatly extend the battery life of the product, thereby minimizing operation and maintenance costs; 3. In special For example, in a polluted environment, the built-in detector and/or external detector can obtain high-confidence parking space change information, and then analyze and decide whether to open the occluder to capture the license plate/parking space image. It can greatly prolong the cleaning time on the outside of the viewfinder and even realize maintenance-free, effectively solve the identification failure and misjudgment caused by environmental pollution, and ensure that the equipment can work normally for a long time with high stability and reliability.

Description of drawings

Fig. 1 is the structural principle schematic diagram of a kind of simplified parking space type roadside equipment of the present invention;

2 is a schematic diagram of the structural principle of the roadside equipment in Embodiment 1;

3 is a schematic diagram of the layout of roadside equipment in Embodiment 1;

4 is a schematic diagram of the structural principle of the roadside equipment in Embodiment 2;

5 is a schematic diagram of the structure principle of the solar energy self-power supply management unit in the roadside equipment of Embodiment 2;

FIG. 6 is a schematic diagram of the layout of roadside equipment in Embodiment 2. FIG.

Detailed ways

As shown in FIG. 1, a simplified parking space type roadside equipment of the present invention includes: a processor 1020, a detector 16, an image sensor assembly 191, an online data communication interface 121, an external power supply or a solar self-power supply management unit 18; the processing The detector 1020 is wiredly connected to the detector 16, the image sensor assembly 191, and the online data communication interface 121, and the external power supply or solar self-power supply management unit 18 is electrically connected to other electrical components in the roadside equipment; The processor 1020 mobilizes the detector 16 and the image sensor component 191 to detect the dynamic changes of the vehicle entering and leaving the parking space, uses the image sensor component 191 to detect and recognize the license plate, and outputs the comprehensive optimal license plate recognition result within a specified time. , Parking space occupancy test results and pictures required for evidence collection and filing. Now in conjunction with two embodiments, detailed optimizations are made:

Embodiment 1 is a parking space pile used for on-street parking automatic charging processing. As shown in Figure 2, this embodiment adopts the national standard ETC on-board unit OBU for on-street parking charging, and also uses video images for parking space occupation. Position detection and license plate recognition require high-definition pictures to be captured for record and evidence collection for vehicles entering and exiting, and the wireless reporting method is used. Due to the complex functions, the power consumption will be more, which is the most optimal. The mains power supply is used, that is, the external power supply management unit 18 pairs of equipment are used. to supply electricity;

Further, since the national standard ETC on-board unit OBU is used for on-street parking charging, the processor 1020 adopts the optimal structure combination of the microprocessor 10 and the ARM processor 20, and the microprocessor 10 needs to be connected to microwave radio frequency communication. The device 111 and its transceiver antenna 112, corresponding to ETC, need to use the 5.8GHz transceiver and wakeup device 111 and the transceiver antenna 112.

The average size of the vehicle entry and exit snapshot records is about 3 megabytes. Therefore, as an optimum, the online data communication interface 121 uses a 4G communication module 121 and its transceiver antenna 122, and the 4G communication module 121 is connected to the ARM processor 20 by wire.

The image sensor assembly 191 is a series of components for outputting the optical image from the lens through the image sensor and its supporting circuits as the signal required for the ARM processor 20 to collect the image. Two-megapixel low-light IMX291 CMOS image sensor.

In order to solve the problem that the captured picture is too dark due to the serious lack of ambient light at night, the present embodiment uses a fill light and its control unit 193, which are connected to the ARM processor 20 by wire, and as an optimum, a white LED light is used for fill light; Since the device is close to 1 meter from the ground, it is not easy to be polluted, and the video part needs to work continuously, so there is no need to use a viewfinder shutter.

Since the installation position is close to the vehicle body, as the best, the radar ranging module 16 is used as the detector. and the special components of the intermediate frequency signal processing part; because the 24GHz technology is relatively mature, the power consumption and volume are also small, the 24GHz radar ranging sensor is further preferred as the antenna and the microwave signal processing part of the radar ranging module 16, and the built-in MCU is used. After the target distance calculation is completed in conjunction with the intermediate frequency signal processing circuit, the distance measurement result is output to the microprocessor 10 .

As shown in Figure 3, the working principle of this example is: the roadside equipment RSE is installed about 0.4 meters away from the curb, 1 meter high, facing the rear line of the parking lot, and the daily microprocessor 10 regularly collects the radar ranging module 16 target distance information and transmit the detection results to the ARM processor 20. The ARM processor 20 also continuously collects parking images for vehicle body detection and occupancy tracking. When the image detects the license plate, it is immediately recognized, and the arrival or departure of vehicles is detected. , then the microprocessor 10 starts the 5.8GHz transceiver and wake-up device 111 and the transceiver antenna 112 to perform ETC card detection, handshake and data exchange. The ETC requirements information and the pictures required for forensic filing are sent to the back-end platform through the 4G communication module 121, and the back-end platform then pushes the relevant prompt information of the processing result to the driver according to the business process; if the ambient light is insufficient in daily life, the ARM processor 20 controls the opening of the supplementary The light and its control unit 193 are used to ensure that the brightness of the captured picture meets the requirements.

Embodiment 2 is another road tooth machine that does not use ETC means to perform automatic toll collection for roadside parking. As shown in Figure 4, in this example, the mains power supply cannot be used, and only the solar self-power supply management unit 18 can be used to supply power to the equipment. , Therefore, the power consumption must be low enough. In addition, because there is no stake, the device is installed at a height of 10-20cm above the ground, as shown in Figure 6, so it is very easy to be polluted. If protective measures are taken, the consequences can be imagined.

Starting from low power consumption, as the optimal one, Smartway's 2-megapixel Super Starlight CMOS image sensor SC2210H is used, so that the fill light and its control unit can be eliminated to save power consumption; in addition, as the optimal , the processor 1020 adopts the optimal structure combination of the microprocessor 10 and the ARM processor 20, and the daily ARM processor 20 is in a deep sleep state; in order to further reduce power consumption on the premise of ensuring the accuracy of vehicle entry and exit, an external The geomagnetic detector 16 performs vehicle detection. For this purpose, the 2.4GHz transceiver 111 and its transceiver antenna 112 are used to provide the received detection result signal of the geomagnetic detector 16 to the microprocessor 10. Only when a vehicle is found to enter or leave When the ARM processor 20 is woken up, the image sensor component 191 is turned on, the image is collected for parking space occupancy detection, and the license plate is identified immediately when the image is detected. Finally, the NB-IOT communication module 121 with the lowest power consumption and its transceiver antenna 122 , and report to the background the comprehensive optimal license plate recognition results, parking space occupancy detection results, and pictures required for forensic filing.

As shown in FIG. 5 , the solar self-power supply management unit 18 refers to a dedicated circuit that uses solar energy to charge so as to continuously supply power to each internal load, including: a voltage regulator circuit 9 , a group or n groups of serially connected solar cells board 5 , energy collection chip 6 , energy storage device 7 , diode 8 ; in each group, the input end of the energy collection chip 6 is wired to the solar panel 5 , and the output end is connected to the input end of the energy storage device 7 The terminal is connected by wire, the input terminal of the diode 8 is connected by wire to the output terminal of the energy storage device 6, the output terminal is connected by wire to the input terminal of the voltage regulator circuit 9, and the output terminal of the voltage regulator circuit 9 is connected to the output terminal of the voltage regulator circuit 9 by wire. The internal loads of the above-mentioned parking space roadside equipment are electrically connected; in order to meet the requirement of collecting enough energy under the shade of trees, as the optimum, in this example, the value of n is 4, that is, four groups of charging modules are configured in parallel and input to the voltage regulator Circuit 9; further, the solar panel 5 is a low-light type polysilicon solar panel; the energy collection chip 6 has MPPT maximum power point tracking and control functions, and has microwatt-level energy collection capability and low As for the power consumption characteristics, as the best, the BQ25505 chip of TI company is selected in this example; the energy storage device is a lithium battery capacitor.

Finally, in order to greatly reduce the number of equipment failures, in the image sensor assembly 191 described in this example, a shutter is arranged outside the transparent window for image framing to block water and dust, and is controlled by the ARM processor 20 only when a picture needs to be captured. On and off until image processing is complete to keep the viewfinder clean at all times.

Claims (10)

1. A simplified parking lot type roadside apparatus characterized by comprising: the system comprises a processor, a detector, an image sensor assembly, an online data communication interface and an external power supply or solar self-powered management unit; the processor is in wired connection with the detector, the image sensor assembly and the online data communication interface; the external power supply or solar self-powered management unit is electrically connected with other electric components in the roadside equipment; the processor detects the dynamic change condition of the vehicle entering and exiting the parking space by using the detector and the image sensor assembly, detects and identifies the license plate by using the image sensor assembly, and outputs a comprehensive optimal license plate identification result, a parking space occupation detection result and a picture required for evidence obtaining and filing after the processing is finished.

2. The reduced-footprint roadside apparatus of claim 1 further comprising: a microwave radio frequency communicator and a receiving and transmitting antenna thereof; microwave radio frequency communicator and receiving and dispatching antenna thereof are the communication adapting unit that treater and external equipment, vehicle detector, national standard ETC vehicle-mounted unit OBU and/or national standard electron license plate RFID carry out aerial data transfer, real-time authentication, encryption communication or accomplish financial transaction includes: a wireless communication device and its associated transceiving antenna, wherein the wireless communication device comprises one or more of 5.8GHz, 300-928MHz specific frequency band and 2.4GHz, the wireless communication device comprises: a transceiver, a transceiver and wake-up unit, or a specific wireless communication protocol processor.

3. The reduced-footprint roadside apparatus of claim 1 further comprising: a light supplement lamp and a control unit thereof; the light supplement lamp and the control unit thereof are an illuminating lamp consisting of a visible light LED or an infrared light LED and a driving control circuit thereof.

4. The reduced-footprint roadside apparatus of claim 1 further comprising: a shutter is arranged outside the image viewing transparent window in the image sensor assembly to block water and dust.

5. A reduced-footprint roadside apparatus as claimed in any one of claims 1 to 4 wherein: the processor refers to one or a combination of a microprocessor, a single-core or multi-core DSP digital signal processor and an ARM processor.

6. A reduced-footprint roadside apparatus as claimed in any one of claims 1 to 4 wherein: the detector is a functional component which is arranged inside or outside the roadside equipment, can detect and judge the existence and/or the moving direction of a specific target, provides related result information to the processor through wired or wireless connection and is used for realizing environmental protection, energy conservation and accurate control; the wireless connection is required to satisfy the prerequisite that the detector and the microwave radio frequency communicator or the online data communication interface can be in communication butt joint; the detector comprises: a geomagnetic detector, an infrared detector, an ultrasonic detector, a microwave detector, or a coil ground sensor; the microwave detector is a radar ranging module, and is a special part which works in a 24GHz or 77GHz frequency band and can measure the distance of a close-range target object, and comprises an antenna, a microwave signal processing part and an intermediate frequency signal processing part.

7. The reduced-footprint roadside apparatus of claim 6, wherein: the antenna and microwave signal processing part of the radar ranging module is a 24GHz or 77GHz radar ranging sensor; the intermediate frequency signal processing part of the radar ranging module can finish target distance calculation through the processor through an interface, or finish target distance calculation through a built-in MCU and then output a result to the processor.

8. A reduced-footprint roadside apparatus as claimed in any one of claims 1 to 4 wherein: the image sensor component is a general name of a series of components which output optical images from the lens to signals required by the processor for acquiring the images through the image sensor and a matched circuit thereof; the image sensor includes: a CCD or CMOS image sensor.

9. A reduced-footprint roadside apparatus as claimed in any one of claims 1 to 4 wherein: the online data communication interface refers to an external connection interface for networking communication between the processor and external equipment, a back-end system and the like, and comprises: the wired and/or wireless data communication interface comprises a UART (universal asynchronous receiver/transmitter), a USB (universal serial bus) or a TCP/IP (transmission control protocol/Internet protocol) network interface; the wireless data communication interface comprises: NB-IOT, LPWAN, GPRS/3G/4G/5G, WiFi, Bluetooth, ANT, ZigBee or wireless network communication component of specific protocol and its matched receiving and transmitting antenna.

10. A reduced-footprint roadside apparatus as claimed in any one of claims 1 to 4 wherein: the external power supply or solar self-powered management unit is used for supplying power to each internal load by the roadside device by using the external power supply management unit or the solar self-powered management unit; the external power supply management unit is used for supplying power by using commercial power or using an external high-capacity lithium battery to supply power to equipment; the solar self-powered management unit is a special circuit which charges an internal energy storage device by using solar energy so as to continuously supply power to each internal load, and comprises: the solar energy collecting device comprises a voltage stabilizing circuit, one or more groups of solar cell panels, an energy collecting chip, an energy storage device and diodes which are sequentially connected in series; in each group, the input end of the energy acquisition chip is connected with the solar cell panel in a wired mode, the output end of the energy acquisition chip is connected with the input end of the energy storage device in a wired mode, the input end of the diode is connected with the output end of the energy storage device in a wired mode, the output end of the diode is connected with the input end of the voltage stabilizing circuit in a wired mode, and the output end of the voltage stabilizing circuit is electrically connected with each load inside the parking stall type roadside device; the solar cell panel is a monocrystalline silicon, polycrystalline silicon or amorphous silicon solar cell panel; the energy acquisition chip has MPPT maximum power point tracking and control functions, and has micro watt level energy acquisition capacity and low power consumption characteristics; the energy storage device is a battery capacitor, a super capacitor, a composite capacitor, a rechargeable lithium battery or a thin film battery.

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