bài 7: Lập trình robot giáo dục KC-Bot đi theo vạch sử dụng cảm biến hồng ngoại

Today, we are going to use the outdoor experience to make a robot track Before we start, let's watch a clip about the outdoor experience in a real calculation This clip was shot at night with an outdoor camera The question is, why can people see places? In fact, these are living bodies in the dark The reason is that our living body will emit waves These are the waves we see It is called the infrared wave So we can observe In this slide, you can see that the light will spread from very short waves bring high energy to long waves and bring lower energy It is because our living body emits waves that we do not see It is called infrared There is a definition of infrared Infrared is an electromagnetic wave with a wavelength longer than the light but shorter than the wavelength of the infrared In the chart, you can see that it is in the middle Infrared is known as nona It is outside the red line The red line is the color in the light So it is outside the red line Infrared is a thermal infrared camera It absorbs the heat emitted by the living body The place with the highest temperature The thermal spectrum is the brightest These are the applications you have just seen This is the definition of infrared It is called It absorbs infrared in an active way Active means that I must have the source of infrared If I don't have the source of infrared, I can't absorb it This is one type There is another type It is called positive What does positive mean? I will get the active source of infrared I will see how the change of the active source of infrared changes From there, I can deduce what it absorbs or radiates at different levels This is one type It is called It absorbs infrared in an active way The other type is called active What we will apply in the robot is the active source The application of infrared is also used quite a lot It will be used in the military Military is used a lot As you can see in cameras It will be indispensable The source of infrared to observe objects at night Similarly, there is another application It is applied in astronomy To observe from a distance in the night sky There are many applications From the general principle of infrared Let's go to the specific example It is a robot It is equipped with an infrared sensor Sorry, it is equipped with a module It is not a sensor I will analyze this module This module of the infrared sensor of the robot There will be 4 pairs of eyes If you look at the direction I point The pair on the left is A5 The pair on the right is A7 The pair on the right is A6 The pair on the right is A4 Maybe you will have a test later Before you make a robot You should test again To see if my information is correct Maybe it is wrong The solution is You read the value at A5 You suspect that A5 is in this position You just read First, you put the white paper in See how much it reads Then you put the black tape in See how much it reads If there is a clear change I am reading correctly This eye is A5 Similarly I suspect this is A7 I put A7 in the white paper position I read Then I put the tape in the position of A7 I read See if my value is correct Or my A7 is here If you put white paper and black paper This eye does not change I suspect this is A7 So you have to set it to the correct position Then I can do it That is the module The module that uses the external sensor For you to apply Now let's see how it works First, we will analyze the image on my slide As you can see On a board They must have drawn a path for the robot to go On a board I assume The path is