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This is not magic, just to see the three-dimensional world on a two-dimensional projection of the retina
Zhuo teacher from the public micro-channel number has passed rules announced in advance + one month, after about a week of discussion and improvement, and finally the contest rules posted on the official website, always wanted to chat about the new rules, but public fear behind No. inquiries and replies will crash out regular updates of the brain holes, then wait a few days.
By precipitating these days, great direction should not be any changes, and it ado, fly-by technology to talk with you, "the fourteenth session of the National University of Smart Car Contest" to add a stressed - "
NXP Cup. "
Always pointing arrow to the right
Why the emphasis on "NXP Cup": Because this year, NXP is no longer a strong push money MCU you, did not even see the greatly enlarged meeting Zhuo mention gold master has recommended certain types of chips, as long as the former NXP or freescale chips are let the competition, no longer have quantitative restrictions, it looks like the first time there is such an open rule on the master.
For an open game, there should be more open rules in order to better implement the "...., ...., Encourages exploration, the pursuit of excellence" the guiding ideology.
Sense Xie Enzhi Pu sponsorship, so much so that racing fans will be racing without the application fee.
Mirror and arrows pointing arrows actual inconsistency
No longer classified by the sensor: this is the smart car race since the birth of one of the most open on the sensor limit. No clear classification by sensors and restrictions, contestants need to use a variety of sensors by combining the track to complete more complex tasks.
For example, relying solely on electromagnetic guide will hit the "transverse roadblocks", requires a combination of a camera or ultrasound; another example, rely solely on the camera may fail to get quite a show dislocation "break element", requires a combination of electromagnetic signals to guide through the safety breaking zone, of course, you can rotate the camera by either the active circuit breaker entrance area, a combination of both, may be able to have the most coquettish walk.
You see it is real, but never seen in your perception
In short, it can be considered from the liberalization of "smart car" closer to this name, no longer a simple sensor grouped by tracing Sprint, though more elegant tracing smart car race walk is the charm one, but a more comprehensive tasks and students can play tracing widen the gap,
Otherwise undergraduate students really think that will play the point on the tube black and white infrared tracking it.
The environment is no longer forcing indoor shading, rules made it clear that "in general will arrange indoor venue, the race may have direct sunlight or strong light irradiation", for the five categories is indeed room for the car the ability to adapt to the environment presents new challenges.
Unified round and square
In fact, there is also a greater emphasis on the interaction with a variety of sensors, no longer a separate data as the basis for tracing, of course, a better camera performance is essential, such as MT9V032 total drill wind camera, it is worth having , unknowingly implanted in an ad, but do not look at advertising to see the effect, really good.
Size requirements this year on car models size also made ever uniform regulations. In addition to off-road group, the other groups to produce the outer contour of the work for the entry must be less than
30 25 20CM (length width height), the outer contour of a particular note.
This change is also mentioned in the above had the purpose to strengthen the two, you need to collect more car models metadata to ensure stability, rather than blind pursuit of speed, the pursuit of more comprehensive design algorithms, design aesthetics and also in terms of practicality closer to real applications.
Exotic car roof
Previous set of electromagnetic inductance shelves and car models really too disproportionate. Imagine if a true frame with a hurricane on the road than they are long pole several times, I can think of only drinking crane driver foolish.
So this change must be progressive, reducing the speed to reduce the dependence on the tires, of course, high-20CM camera will not necessarily slow down, this is the game to watch and technical compromise, many people feel that last year too 10CM short, maybe just this year's unified 20CM.
Rotating helix
More than talk about a few more crucial uniform change for six groups, each group chat, respectively, followed by the more popular topics, but also to some do not pay attention to which groups made up of children point of reference:
Four groups most traditional of a group, but also the most entertaining a group of speed. Cars disturbance experienced after car models is also discussed finally calm, B, C, optionally car models. Of course, it is recommended C car models, do not want to feel, B Cars tires, steering, front steering design really do not want too much trouble.
Rolling up the ball
As mentioned above, many times before, the purpose is to let people put more energy is used up program and algorithm design, toss car models really did not make much sense, does not venture to guess what percentage of B car models this year, also hope to remind Cars the importance of quality manufacturers, do not think this is a small college on the casual game design, or the need to use the point of mind.
Zhuo thanks to the insistence of the teacher, not because someone challenged to change their mind, this decision must be in favor of the players, is no longer whether softeners bubble tires and tire compliance torture miserable.
It has been up rolling the ball
Of course, this group is not in fact a "white four group" so simple it. For example, on the last of the three groups, we all feel simple but gone, so this session should be the most competitive in this group friends. Also contains all the elements of the track, entry is easy to difficult to do fine, want to take the country should be a difficult challenge. Come on everybody, the last group of speed and passion.
Total inductance drill wind camera + + ultrasonic wave sensor selected recommendation. (Because there are cameras, KEA insufficient resources, recommended LPC54606, are used to K60 K60 may also be selected, but not so abundant supply, the price is bound to the back, LPC not only better performance, lower prices, good buy more important is the fly-by LPC library has been open it, and learn to use the basic no threshold.
After reading it feel strange
Three groups need to be able to switch the car running in the upright and horizontal state, a relatively new play.
Want to accomplish this kind of action will require that the preceding car models can be more compact, so the rules will be more open in restrictions on car models, the same as long as the guarantee and F wheelbase. Allows D, E car to make alterations, artisans try to play to their imagination to the test validation.
Personal recommendation to make alterations. F car's front wheels too, the attitude is not conducive to switching, there is a very important point. Vehicle wheel track is smaller than F D, E car, but D, E, F are relying on a steering differential. Track, the easier turning roll. Coupled with F bulky body, from the speed limit is concerned, F car must lose to D, E cars.
D, E select different car is not so big, personal recommendation D car, why the specific previous articles have discussed that will not repeat it.
D conversion on the car we tested a variety of wheels, including what kinds of Zhuo teacher mentioned in tweets, not very satisfactory, still looking. Need to be flexible, smooth, quality is still very light in order to achieve the desired effect.
Also note that: D underbody short, the wheels need to add that extends the length and the same wheelbase to meet vehicle requirements rules F;
About the direction of the front caster D car recommended, because this limits the length of the vehicle 30CM, after the steering wheel, then start counting from the rear car models, car models stand out floor + pole car models are forward-looking, fairly to no waste length.
If the caster is in the running direction, then the back cut is equivalent to the dragging run length is wasted. Of course, this is for the electromagnetic sensor, a little effect on the camera. But also repeatedly mentioned above, this year requires a variety of sensor fusion in order to better match tasks to complete, so the electromagnetic prospective is also important.
For speed three groups may be discount. Although the mere three and two have basically reached the pinnacle of speed, but the combination of two operating states will make two kinds of machines can not achieve the best, so you need to consider trade-offs and compromises, but I hope you do not stop large man still racing, racing, after all, no speed, there would be no passion.
Beacon Group adopted for the first time introduced the smart car competition McCollum H wheel car. In addition to relatively new car models, tasks other requirements are basically the same and previous games. Nothing more than the beacon lights more often, need to pay more attention to obstacle avoidance, to avoid hitting the car models extinguished beacon lights out the lights affect speed. In addition there have been also canceled ultrasonic beacon light on the year last year, really not much need.
In fact, early Zhuo teacher vision beacon game task quite good, need to tracing out the lights, the track can also be shared with other groups, do not have to lay alone. Perhaps consider identifying beacon lens and the lens is to identify the track conflicts, and perhaps consider a slightly larger span so no difficulty introducing this idea, hope to be able to find a suitable job setting reintroduced, update it now more boring out the lights task.
Current rules, as long as the car seized control method H, the task is relatively standard set of letters is relatively little change.
But the car does not so fun, H: 4 motors, 4 speed, how to do it?
KEA is not enough, K60 is not enough, LPC is not enough, and so on. LPC54606 there is a solution, through the rational allocation of resources to achieve the total drill a LPC54606 drive a wind camera, four motor 8 PWM outputs. Fly-by-wire four-1024 mini-speed encoder.
Probably idea is as follows: using SCT module output PWM. SCT has 10 event channels, up to the same output channel 9 but the duty cycle of any periodic PWM (because periodic event needs to occupy a channel, this can only output path 9).
Since the camera capture an event channel will be occupied, and therefore also the output of the PWM channel 8, so just be used to control reversing of the motor 4.
Then ctimer can be used to collect the data of mini encoder, a total of five ctimer can be used to collect data encoder. Note ctimer does not support quadrature decoder, and therefore need to use the directional signal is high and low encoders, fly-by-line mini 1024 encoder, you deserve to have.
To do routine revenue caused by flying LPC library, you can update the library reference. There are many couples like to ask the group what the camera beacon good use? I say, of course, the total wind drill you, not according to the official statistics, the last beacon before 15 has a total drilled wind camera 12 teams are used, including the former three (statistics may not be entirely accurate but probably in this way).
Incidentally, H car running really quite noisy (first floor there H car test video and motion control experience to share a little bit), above the wheels small wheels may come loose, when we usually remember to practice multi-examination.
Two-car set a horizontal run, a run upright. Cars do not limit the rules Thanks again, B, C and car D, E optionally car. Cars on the choice of course is the recommended C + D friends. Cars run level is not repeated, the first reference to the above four groups.
Cars and tricycles recommendations upright running the same direction so that the floor of the car models run as the front direction. In 30CM length limit electromagnetic maximize the use of forward-looking good. In fact, for upright car, even pure electromagnetic guidance, can complete the task at a rapid rate, you do not even need to spend camera. + Ultrasonic inductance can be completed, so reducing the workload can be considered active double EMU.
But given this year's two-car group may be 5 people, if not more soy sauce, spare capacity within the group, of course, you can choose the camera.
All to knowledge Well, do not care about the trouble or not, the workload can be overcome and overcome.
About two-car choice is to continue driving after the intersection chose to return travel, the initial thought is to continue to travel easier point, of course, depending on the characteristics of the track may be. We assume that the two vehicles are basically doing it perfectly, then the four-wheel speed must faster, combined with the track located at the intersection of location, it is possible to turn back the overall saving more time.
But also consider a waste of time to turn around, turn the car upright difficulty, so under normal circumstances, continue driving after a bold guess most people would choose intersection.
In addition, two-car two vehicles is essential to communication, how to ensure a shorter time to go through poor starting line, it is essential to communicate it. Welcomed the choice of fly-by-module upcoming version of NRF, use SI24R1 chips, high-power mode, the power module is set to 7db, using the serial port can be configured, the default setting for the communication frequency 2.5Ghz. Wifi can effectively avoid interference, the maximum baud rate of 460800, the measured open area without interference environment speeds up to 40KB per second, escort your two-car communication.
Cross-country group because last year a west wind tournament play with naughty big brother, led the group outside the country last season, and then gave birth to this year's outdoor off-road group.
Although the pictures have been published and buying patterns, but also spot the car models late or not, one can expect two car models ready goods as soon as possible.
Relatively speaking, outdoor cross-country tracing is relatively simple, electromagnetic tracking can be, if not a camera, a KEA128 master control to meet your needs, the rest is how wild drag racing.
No track, even size are not restricted, casual modification, but wild at the same time to consider a more complex road bump that outdoor venue deliberately set, bunkers, and other puddles. It is no longer a indoor highway, so it is necessary to consider waterproof and dustproof circuit board.
Cars off-road performance while machinery is more worthy of study. Whether your design Naicao become a focus, do not Paozhaopaozhe out that this is not too bad a repine. Unknown things need to be consolidated into account, your design to adapt to the unknown arena setting, wild while still very stable.
The new large size SUV, the new attempt, roadside
Little sister's surprise, admiration, or perhaps sister artifacts tease it, whether you want to immediately do a sport utility vehicle. But it was just a joke, little sister does not like the stuff it up to see a bustling fills roll to honestly shunting, little sister or something not even think about it.
Saving group changed this session saving group is more subversive, you can not use the wheel. No wheeled vehicles is also called the car?
Is not very ignorant force, wireless charging do not understand it, have made no wheeled vehicles, but also to store no more than 2,000 joules in addition to chemical energy auxiliary drive some mechanical energy, potential energy, solar energy batteries, etc., is not feeling brain Cave has lost its way, is not feeling a little inattentive will be other chiefs Kuangshuai few blocks.
Yes, this is the group saving the most challenging groups, to do good can really throw the opponent a few blocks, it is precisely because the rules relative to other groups such brain-hole wide open. Really that bad kind of clever ways to travel more energy efficient.
Of course the track is relatively simple, but the poor performance of the track; crawling complex structure, if multiple servos way should not be energy-efficient, and the speed may not be as track; cushion to tell the truth no studies, no comment.
Personally I feel that if we can do good overall rolling should be a good choice, but the relative difficulty of making possible the greatest. Scroll can make better use of inertia, can save energy. Mobility can refer BB8 (Star Wars Force awakening inside that Meng Meng robot), although it is science fiction, but proportional toys is not new, if we can make this design, personal feel will be completed relatively efficient competition task, sincerely hope to see similar design on the fourth session of the court, everybody is looking forward to the show.
Say so much crap about, you will see it. What analysis is unreasonable or wrong, or you have a better idea of welcome Replies exchanges of promoting progress.
Next, prepare the car into the pit smart little children, mentally prepared,
Do not impetuous, down, diligently knock on the code, go to the drawing board the sub, to transfer machinery, the pursuit of excellence with the mentality to do it. In the process might go through a lot of tough night to solve the problem, but the more problems you encounter, to solve the problem, the more certain the more you learn, not to reach out party, "
Never underestimate the power of action "!
Finally, the Double Twelve fly-by-promotions continue, very sincere offer, not fake fight!
This article compiled by "fly-by technology", the god pat, welcomed the exchange, willing smart car world a better place! Fly-by-technology smart car technology learning exchange group: fly-by Ministry of Science and Technology __ Smart car ② group number: 244 861 897
To a egg, H sports car to test out of basic control method H specification cars in there, as it is no longer in detail, it is recommended here a simple control scheme according to our idea of walking:
Define three variables, respectively Cars run mode, the linear velocity of the car models need to run, the angle of operation of car models. 1 is a left rotation operation mode; right rotation operation mode 2. Other run mode of operation according to the set angle.
The first two modes is very simple, it is the car model around in circles. The third is the focus operation according to a set angle, choose a first direction is 0 degrees, 0 degrees, ie in front of car models, a 360 degrees plane.
The set angle, should first determine the rotational direction of the motor four, after determining the direction and the angle of the linear velocity setting recalculation speed of each motor (a linear velocity that is a direction to car models when speed).
Exercise test video is used in this method, of course, also be employed by flying LPC54606 system board + Total drill wind camera (the camera is not played in this video effect, provide a mounting ideas, mounted in the middle, to facilitate rotation and searching the beacon) + fly-by-wire 1024 mini encoder.
Four motor closed-loop control, can be seen from the video, H car noise is really great, and this structure is prone to slip, it is prone to misalignment.
This deviation is also a solution, and the balance of the car steering closed a similar principle. Although not yet verified, but estimates ICM20602 plus a six-axis gyroscope H loop will greatly improve the ability to control the direction of the car, why is ICM20602? Since 6050 than good. An additional word of caution, H car shake a lot, it is recommended fixed camera with a locknut.
Initiate more and more advanced gameplay and everybody needs their own to explore. But this year shunting beacon group is estimated to be another group mind, really noisy, you might as well replace the four wheels E, structures are the same, imagine if E wheels allow replaced, there will be more violence……
Note: The action figure tweets from the public No. "Institute of Physics" in tweets: Japanese mathematics devil illusion magic, millions of people have been blind to see.
Einstein said,
The primary goal of education is to think independently, rather than knowledge. So, if in the process you find yourself always like to believe my ears, listen to others; or like to believe their own eyes, to see other people, it will fall into the trap. Reach the purpose of cultivation of independent thinking.
If you develop their own independent thinking it? For learning engineering technology is concerned, the best way is
To go and experience. Go to production, programming, testing, and error correction.
Of course, listening to the others, watching others do the learning process is better than "
Directly ask for "better. If you find yourself always like to reach out, then they cut it.
Participate in school smart car competition the students technical training
