Technology and life: starting with solar cars

Chapter 125

For visual simulation, we can use our common camera. Of course, if you need to add other functions to the mecha, for example, if you want the mecha to have the function of infrared rays, then you can install the infrared rays in another eyeball or It can be installed in other places.What type of equipment to add depends on the future use. If it is a combat mecha, it must be equipped with night vision equipment. If it is a home version of the mecha, it is more casual, and you can freely according to your own needs. It is also possible to add some devices or not add any devices.

After the human visual simulation is finished, the next step is the human auditory simulation. Of course, the human auditory simulation is the same as the human visual simulation. Some tools or instruments are needed to complete these simulations of human facial features. The simulation of human hearing naturally needs our common microphones or speakers. Microphones and speakers are used to simulate human hearing and respond to external information.What needs to be clarified here is that the microphone and the speaker are not the same thing. The functions of the two are diametrically opposed. It is necessary to have both mechs to truly simulate the human hearing.Here we must first understand the difference between the microphone and the speaker. The function of the microphone is to receive the sound signal from human beings, and convert the sound information from human beings into signals for further transmission. Its function is to receive sound, not to emit sound. The device that can emit sound is called a speaker, which is the speaker on an old-fashioned computer that we often see before. There is a power amplifier in the middle, and the machine with two small speakers next to it is what we often call a speaker. It is the equipment that makes various .mp3 and .wmv files play sound. It is with this kind of speaker that the sound signal file in the computer can be transformed into a sound signal and transmitted out of the speaker, giving us the illusion that we are listening to someone else.Of course, the sound from the speaker must be slightly different from the original sound of the author of the document. The difference between the sound from the speaker and the original sound depends on the price of the speaker. It is impossible for any speaker to restore 100%. The original sound in the file, so it is impossible to completely restore the sound of the audio file.However, the higher the price of the speaker and the better the quality of the speaker, the more the speaker can adjust the sound quality to be similar to the original sound of the audio file.It just means that the high-priced speakers can better reflect the voice of the original owner of the audio file, but this does not mean that cheap audio equipment cannot restore the content of the audio file, it just means that cheap audio equipment may cause a gap between the sound and the person It is very large, but it does not mean that those cheap devices cannot produce sound. Naturally, cheap devices can restore audio files and sound online.It's just because cheap speakers are relatively poor in sound output. In terms of sound quality alone, there is still a big gap between cheap speakers and expensive speakers.But you can still hear the sound from the speaker with cheap speakers. It doesn’t mean that you can’t use cheap speakers to complete various audio output operations. The main thing is that there are no errors or accidents in the analysis of audio files.Of course, this kind of situation is only suitable for those who do not have high requirements for sound. Anyway, for most people, as long as they can hear the sound clearly, they will not pursue the height restoration of the sound, but for those who have high sound requirements For very tall people, it is obvious that the sound quality of cheap speakers is not very good, which leads to various prices of speakers, cheap ones can be bought for a few dollars, and expensive ones have no upper limit , any price is possible.Those cheap speakers are the relatively simple speakers we have seen. Such cheap speakers do not have any auxiliary equipment such as power amplifiers. There are only two solitary small speakers to play the sound. The restoration of sound quality is still possible, which belongs to the level that everyone can accept.Cheap speakers no longer need to use a plug to connect to 220V household electricity because there is no power amplifier.But this does not mean that the device can be used without power supply, power supply is necessary, otherwise the device will definitely not be able to operate normally, and in order to provide power to the device normally, it is necessary to obtain power from other places at this time, obviously The electric energy can be obtained from the machine attached to the speaker, in fact, the electric energy is output from the machine attached to the speaker to provide power to the speaker.Take the computer as an example, the USB interface on the computer is 5V output. At this time, in order to adapt to the voltage output of the computer, the input voltage of the speaker needs to be set to 5V, that is to say, the voltage of the speaker is 5V and the USB interface of the computer The output voltage is also 5V, just enough for the computer to power the audio speakers.

The same is true for the mecha, we can set a specific voltage for the mecha, and then lead a power supply line from the battery pack of the mecha or the main board to supply power to the speaker and microphone.The USB interface of the computer is 5V, the output voltage of the car used at home is 12V, and the output voltage of those large trucks is 24V. To set a special voltage for mechs, of course, this voltage is not set casually, but should be set in consideration of the performance requirements of the mechs and the safety requirements of the mechs’ electrical energy. It is known that the safe voltage of the human body cannot It is higher than 36V, so you can set a value below 36V, for example, set it to 32V, so that the voltage of the mech can be distinguished from the voltage of other mechanical products, and the voltage of 32V can be used as the basis for continuous derivation. All kinds of auxiliary supplies for the mecha, such as the tempered film of the mobile phone and the mobile phone case, are derivative products. The mecha will naturally develop various derivatives with the development, including some that can A plug used on the mecha to charge electronic products such as mobile phones.When the voltage of the mecha is set to 32V, all output voltages on the mecha will become 32V from then on, and all electronic components of the mecha must be changed to 32V to adapt to the normal operation of the mecha.Setting the voltage of the mecha to 32V does not mean that electronic products with other voltages cannot be used in the future. Just use a voltage converter to convert the 32V voltage of the mecha to other voltage values ​​to use other electronic products, such as mobile phones. It is completely possible to use a transformer to change the 32V power supply on the mech into 5V to charge the mobile phone.

(End of this chapter)