The impact of environmental factors on electronic devices
Abstract: Will software instructions be sloppy? Is the electronic device afraid of cold? Which one is more stable for BMW and bicycle? This article refers to the address: http:// I remember that the first programming class for university study was C language. After listening to the course of explaining the contents of the book for a month, I finally understood the basic concepts of variable assignment, function parameters and arguments, and completed the following code for the first time. : Figure 1 Simple calculation function I still remember the excitement at the time, because I will write a calculator! I have a question when I am excited, this calc function will not be unstable, such as when the computer is very stuck, the CPU is overheated, the power supply voltage is low, etc. Will not swear by returning the wrong result? After many tests and verification, I found this function to be very stable and always return the result I think is correct, so I think the software is like a trustworthy person, in the case of eliminating the bug. It is always executed according to the instructions you give, which is very reliable. Most of the time, the university is pure software programming. After more programming experience, I am more convinced of the reliability of the software. It will never lose her temper or swear. (Many programs have always fantasized to have such a girlfriend. Later he understood that this is absolutely impossible. At the same time, due to the small amount of hardware contact, my default electronic device (such as the development board) can always execute various commands correctly after debugging, but then a strange thing happened: Just graduated, I am eager to replace my cottage machine with a Nokia mobile phone, mainly because the mobile phone camera pixels are relatively high, the result is not too long, one day when the camera screen becomes full screen Snowflakes (that is, the old-fashioned black-and-white TV didn't signal that effect!), and after a few days I continued to use the camera function again, I found that the snowflake is still the same, based on the idea that the electronic device is always stable, I thought: Finished, it must be the camera hardware. Already scrapped! I thought of the more than 2,000 RMB that I spent in the past, I thought that Nokia will continue this way, certainly not far from being acquired. However, after a few months of accidentally turning on the camera function, I found that the photo was completely normal, as clear as before! Well, the original electronic device is working properly, but also look at the mood...; However, seeing the lost 2000 RMB, heart I think Nokia is a rare conscience company. Later, several college students chatted, one of them said that the winter home was too cold, his ipad was not charged, and he had to be placed in the bed to be charged. Everyone agreed that this was because his iPad was too expensive. Slowly, I was exposed to more unstable electronic devices. For example, a news article titled "The largest sunspot outbreak in 11 years has a visible area of ​​nearly 50 Earth" reminds everyone that electronic products may fail for a short time; for example, the slower the mobile phone is, the more it will reset the system, and there will be no re-flashing. Too much improvement, this time we must consider the aging of mobile phone hardware, such as the slow reading and writing speed after the aging of the flash memory caused the phone to hang, this aging is irreversible. After participating in the development of high-precision instruments after work, I found that the more complex and accurate the instrument, the more expensive the price, oh no, the more susceptible it is to environmental factors. The PA8000 high-precision power analyzer developed by Zhiyuan Electronics has the industry's highest power accuracy of 0.01%. Let's take a look at the chapter on accuracy in the PA8000 user manual: Figure 2 PA8000 accuracy description In the above picture, in a relatively stable environment such as temperature and humidity, the frequency of the input signal is different, which will affect the measurement accuracy. Of course, if the PA8000 is moved to the northeast for measurement, it will also affect the measurement accuracy. Figure 3 12 months accuracy The lowest 12-month accuracy in Figure 3 indicates that the instrument accuracy will decrease after the instrument has been shipped from the factory. If you purchase PA8000 for 1 year, the accuracy is reduced during the test. In order to ensure the accuracy of 0.01%, it is best to return to the factory for recalibration. For those who have not been exposed to complicated measuring instruments, it may not be possible to understand that many high-end instruments on the market are more than 100,000 million, and the instruments are easily affected by interference. This is mainly because the manufacturing process of these instruments is complicated and used. There are many components, such as temperature and humidity, electromagnetic interference and other factors easily affect these components, thus introducing instability. If there is a problem with the bicycle, most people can fix it by hand. However, if the car has a problem, it can only be handled by the garage or the 4S shop. The BMW is stable and stable but the bicycle. In order to ensure the stability of the product to the utmost extent, the power analyzer developed by Zhiyuan Electronics has to undergo strict processes such as high and low temperature, damp heat, vibration and other environmental tests, EMC electromagnetic compatibility tests, and calibration before leaving the factory. In the actual test, the above factors such as temperature and humidity rarely affect the instrument, and more is the interference introduced by the input signal, such as measuring probes, field wiring, etc., which are easy to cause the final measurement result to be incorrect. This requires rich field experience.
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