one. text (1) Project summary The interactive robot car is an intelligent control platform that can realize data collection and video monitoring through wifi. It integrates entertainment and site surveying into one. It adopts AT32UC3A0512 with superior audio decoding and streaming media processing capabilities as the core, and successfully embeds web pages on the EVK1105 development platform. And to achieve no need for plug-ins or asp, php and other languages, only rely on the interactive control of the html language. The interactive robotic car can also dynamically monitor the video and view the relevant media on the web without any plug-ins. The control of the car is also done directly on the webpage without any software. If there is wifi on the mobile phone, you can log in and control directly after testing. Moreover, the related sensor module is added to the trolley, and the data can be directly sent to the webpage, and then the browser plug-in can be used to directly import the data into the relevant database or upload it to the internet. (2), hardware principle 2.1 System structure diagram 2.2, car drive module In order to enhance the field data collection capability of the car, we designed the car as a four-wheel drive structure and all controlled by a 360 degree steering gear. Although it will reduce the running speed of the car, it will give the car a large torque and load capacity, so that it can move freely on the rugged grass. We used a total of six steering gears throughout the interactive robot car design: DS04-NFC and FUTABA3010. The DS04-NFC is a 360° steering gear that is mainly used to drive the car forward. Its control signal is a 50Hz square wave signal, and a high level pulse lasts for a speed. When the high level is 1 millisecond to 1.5 milliseconds, the steering gear rotates forward (the forward speed is the fastest at 1 millisecond, the slower the 1.5 millisecond, the servo is stopped at 1.5 milliseconds), and the high level is 1.5 milliseconds to 2 milliseconds. When the steering gear is reversed (the servo is stopped at 1.5 milliseconds, the faster the speed is reversed to 2 milliseconds, the reverse speed is the fastest at 2 milliseconds), and the differential is controlled by turning. The FUTABA3010 has a camera pan/tilt, which is a 180° servo. It can control the left and right turn and up and down of the camera according to the given PWM duty cycle. 2.3, Arduino control board In this design, we used the Arduino328 drive motor. It mainly uses Atmel's Atmega328 as the core, and all the resources in the MCU are compiled as open source functions, which can be directly called, viewed and modified. The specific schematic is as follows: 2.4, DC-DC boost module This module is mainly used to provide power for wireless routers. The specific circuit is as follows: Figure (4): DC-DC boost circuit (3), software architecture The software part is mainly divided into three parts: wireless routing plus moTIon camera monitoring, Websever on EVK1105, and servo drive on Arduino. 3.1 Wireless Routing Module On the wireless router we embedded the openwrt operating system for managing network connections, automatic dialing, wifi control and more. UVC camera is also attached to the router, using moTIon for video management. The specific edit is as follows: The Explosion-proof Screen Protective Film for mobile phones is a protective film that can effectively buffer the impact, prevent the screen from bursting, or prevent the glass panel from being broken and scattered due to accidental impact of the mobile phone. Screen protector with gloss, texture and surface hardness. PET Screen Protector, Explosion-proof Screen Protector, Explosion-proof Screen Protective Film, Explosion-proof Protective Film Shenzhen Jianjiantong Technology Co., Ltd. , https://www.tpuprotector.com
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