01 Wireless track smart car

I. Introduction

In the summer of 2023, during the National Tsinghua Science and Technology Camp for High School Students organized by Tsinghua University, some students will be organized to participate in the Intelligent Robot Challenge of the Department of Automation of Tsinghua University. It includes two parallel competitions, namely the robot dog and the smart car . At that time, every three to four students will form a team and sign up for any one of the two competition groups by themselves. The specific game time and place are arranged as follows:

Time : the morning of August 4, 2023
Venue : Basketball court on the first floor of Tsinghua University North Gymnasium

This article will introduce the implementation plan of the " wireless track smart car " competition.

▲ Figure 1.1.1 The wireless track smart car competition process

▲ 图1.1.1 无线电轨智能小车比赛过程

2. Competition arrangement

1. Time and place

The students who participated in the "Radio Track Smart Car Team" used part of the summer camp time to complete car model composition, software debugging, on-site competitions and other activities. The time and venue of the whole event are arranged as follows.

Activity time : July 31, 2023 - August 4, 2023;
Venue : Central Main Building, North Gymnasium.

2. Team composition

Number of teams : 48 teams;
Team composition : Each team is composed of three players, and as far as possible, students with complementary abilities in mechanics, electrical electronics, and software programming will form the participating team.

Basic requirements for participating team students:

At least one student is proficient in basic computer applications, and can complete software installation, download programs, and Python language learning through training videos;
At least one student has strong hands-on ability and can mechanically assemble, maintain and adjust the car model;
At least one student has strong knowledge of physics, electricity, and electronic technology, and can identify the competition tasks and the electronic modules in the car models, judge faults, and understand the basic principles of the competition tasks.

3. Schedule

time	Place	Activities	Remark
July 31st 8:00-12:00	competition group	(1) Establish a WeChat group for students participating in the competition, (2) Announce training materials and videos for participating in the competition; (3) Students form teams to sign up; (4) Students observe the training videos by themselves, prepare laptops, and pre-install software.
July 31, 13:00-17:00 (in two batches)	Central Main Building 501	(1) Participating students go to 501 of the main central building to receive the racing car model kit; (2) Perform on-site hardware assembly according to the training video to check whether there are hardware problems; (3) Run the test sample function sample program under battery power supply; (4) According to the order of registration and team formation, it is divided into three competition groups, with 16 teams in each group.	A notebook is required.
August 2, 8:00-12:00 (in two batches)	Central main building (501) commissioning site	(1) The teams go to their respective debugging venues to debug the competition tasks.	A notebook is required.
August 3rd 17:00-19:00	North body	(1) Competitors can go to the venue for pre-competition debugging.	A notebook is required.
August 4th 8:30-12:00	North body	(1) A quiz on the theory of the wireless track smart car competition (half an hour); ( 2) An explanation of the competition process and specifications; (3) The three groups competed on task 1, task 2, and task 3 at the same time; Comment on the results of the competition; (5) Awards and awards.	(1) Bring a mobile phone: for theoretical quizzes; (2) Bring a notebook: for competitions.

Note:
(1) In the afternoon of July 31st, the event will be divided into two batches. According to the order of team registration, students in the first 24 groups go to Room 501 of the Central Main Building from 13:00 to 15:00; students in the last 24 groups go to Room 501 of the Central Main Building from 15:00 to 17:00.
(2) On the morning of August 2, the activities were divided into two batches. According to the order of team registration, students in the first 24 groups go to Room 501 of the Central Main Building from 8:00 to 10:00; students in the last 24 groups go to Room 501 of the Central Main Building from 10:00 to 12:00.
(3) On July 31st and August 2nd, the centralized debugging time is arranged for teachers and volunteers to answer questions on the spot; other times, participating team members are free to go to the debugging site on the fifth floor of the central main building for debugging, and there is no time limit . Everyone enters the corridor debugging site on the fifth floor from the elevator on the west side of the main building.
(4) Before the start of the competition day, there will be a theoretical quiz for the wireless track competition on the spot, using the Rain Classroom (the instruction video for entering the Rain Classroom will be sent in advance), and each student will do 50 multiple-choice questions independently for 30 minutes.
(5) Each participating team (3 people to 1 group) must bring a laptop computer for debugging the car model software.

3. Content of the competition

1. Introduction to the competition

The content of the " wireless track smart car " competition is a pre-research competition question from the national college student smart car competition . After the preliminary preparations and the rehearsal of this summer camp, the foundation will be laid for next year (the 19th Smart Car Competition in 2024).
▲ Figure 1.3.1 A glimpse of the National Undergraduate Smart Car Competition

▲ 图1.3.1 全国大学生智能车竞赛一瞥

With the emergence of various intelligent unmanned systems, people need to apply them in various applications to solve various problems in production and life practice. The wireless track smart car platform is for middle school students and college students who can assemble and debug a smart car that can meet specific competition tasks under the condition of learning relevant basic knowledge. Through this process, try to solve " complex engineering problems " through the division of labor and cooperation of the team.

▲ Figure 1.3.2 Wireless track smart car

▲ 图1.3.2 无线电轨智能车

The basic task of the wireless track smart car is to form a small car model that operates independently by means of mechanical and electronic parts, and complete the following basic tasks with the help of software programming: (1) The car model can complete the wireless energy reception from the laid race track
. , and drive the car model to run;
(2) Accurately track the track by sensing the alternating radio magnetic field on the track;
(3) Identify possible obstacles and complete the detour.

The basic software and hardware platforms of the competition:

Car model kit : mechanical and electronic kit car model parts;
Radio track track : PCV track, multi-strand yarn covered wire, high-frequency drive power supply;
Competition software : development platform for Thonny to develop software; programming language MicroPython;

2. Training content

1. The participating students can download the principle explanation document, software development environment, competition sample program and demonstration video of the competition kit from the Tsinghua cloud disk;
2. The participating students can learn the following content by observing the online training video:

Car model mechanical assembly process;

Development software download, installation, debugging;

The basic principle of the car model work: including the working principle of each module, test methods and results;

Python language learning, the basic method of MicroPython language used in embedded development;

Detailed explanation of the sample program for car model task completion;

Other related knowledge: basic control principle, high-frequency navigation signal detection principle, basic principle of infrared target obstacle avoidance;

3. Competition content

The content of the competition includes three tasks of different difficulty levels.

(1) Task 1: Basic tasks

Using the equipped lithium battery as power, the car model can complete the task of running the track for a week through programming. There are no roadblocks on the track.

(2) Task 2: Medium task

Instead of using batteries, wireless induction coils are used to continuously obtain power from the track to drive the car model to complete a week of running tasks on the track. There are no roadblocks on the track.

(3) Task 3: Challenge task

This task includes two challenges, you can choose one or two to complete:

First challenge mission : Race mission with roadblocks. The car model relies on wireless induction power to complete a week of running on the track. There are several traversing roadblocks on the track.
The second challenge task : Weak current competition task. There are no roadblocks on this type of race track, but the strength of the wireless magnetic field on the track is relatively weak. Car models cannot actually run continuously on electricity. It is necessary to set a reasonable period for the car model to stop running through the software, so that the car model can complete a week of operation intermittently.

▲ Figure 1.3.4 Competition track with roadblocks

▲ 图1.3.4 带有路障的比赛赛道

4. Scoring criteria

The completion of each game task is equivalent to a score value, which is added to form the game score. The one with the highest score wins.

Each game task is ranked according to the game time. The corresponding equal score is given according to the ranking. The specific method is:

Rank Score = 50 - Rank Position

All teams that did not finish the race are ranked in the same order.

The sum of multiple tasks is the total score of the game. The awards are set according to the ranking of the total score.

5. Award setting

Awards are divided into first prize, second prize and third prize.

On-site awards are only selected based on the score of the competition task. The scores of the theoretical quiz before the competition will be weighted and averaged with the competition task awards, and will be used as the qualification certification results for the Winter Camp of the Department of Automation.

※ appendix※

■ Links to related literature:

● Links to related diagrams:

Figure 1.1.1 The wireless track smart car competition process
Figure 1.3.1 The cross-country bicycle group of the national college student smart car competition
Figure 1.3.3 A glimpse of the national college student smart car competition
Figure 1.3.4 Competition track with barriers

Tsinghua University Automation Department Science and Technology Camp and Tsinghua University Automation Department Intelligent Robot Challenge | Wireless track competition implementation plan