The triple realm of the oscilloscope

Chatting with a group of friends and mentioning the oscilloscope, everyone thinks that the oscilloscope is very important. After all, it is the window for observing the waveform. I said at the time that I didn't use an oscilloscope as much as possible, but I encouraged my colleagues to use an oscilloscope. Netizens are very curious about why I said so, how can I not use conditions? The following is my explanation:

The oscilloscope is a window of waveforms. When there are various anomalies, it can be easily observed from the waveform, so I encourage my colleagues to use it to improve efficiency. However, if you rely on the oscilloscope for a long time, you will lose the ability to reason and analyze. I especially value my reasoning and analysis ability, because when there are some incurable diseases, the oscilloscope is not easy to use. I gave two examples.

1. The discovery of Pluto first calculates the position through theory, then observes it with a telescope, and finally finds it through multiple pictures. Because Pluto is too small and too dark, if you do not theoretically calculate the approximate position, and then use a telescope to observe, it is almost impossible to find, and theoretical calculations can be considered as a process of reasoning.

2. In the early stage of high-frequency induction heating power supply, the customer feedback sometimes had a large power output, which was not noticed at first. However, after the shipment was more, this phenomenon was more common, so it took 2 days for the company to reproduce. This phenomenon, there is indeed a sudden change in power, the operating current jumps from more than 20 A to 40 A, so the long-term observation with the oscilloscope, including the replacement of the motherboard, toss for a week, no abnormalities, indicating that this problem is particularly concealed, we can not distinguish the small waveform difference I need to go through theoretical analysis, so I spent 3 days, step by step to evolve various changes in the waveform, and finally found that when the high-frequency power supply resonant phase lock is neutral, there is an inverter H-bridge dead zone offset. Phenomenon, after the dead zone is offset, it is difficult to find directly from the waveform. Because the waveform locks are in phase, it looks similar, but if it is clear that this problem, you can find a feature of the dead zone offset, that is, die. The location of the turning point caused by the zone is different. Careful observation of the turning point of the dead zone waveform, found this problem, and then adjust the phase lock position to the partial sensitivity, this problem is solved.

Various instruments used by doctors, such as B-ultrasound, are equivalent to oscilloscopes, because with the B-ultrasound tool, even ordinary people can be a doctor when training a little, and this ability is in the device itself, not the doctor. The level of this is a typical weakening case. I am not against the use of oscilloscopes, but I am against the weakening of my own logical reasoning ability, but I want to do my best to improve my logical reasoning ability. The inner logical reasoning ability is based on the initial practice and is based on the extensive use of oscilloscopes, so I encourage my colleagues, especially beginners, to use them extensively.

In the middle of the high-frequency power supply, I met an old Hong Kong gentleman who learned more about the new technology in the United States and instilled in me a set of high-precision design ideas: implanting a high-speed signal acquisition device in industrial equipment, equivalent In a high-speed oscilloscope, real-time sampling analysis is several times tens or even hundreds of times higher than the working frequency. Once an abnormality is found, the working waveform is adjusted to achieve pre-control, and our general textbooks explain post-feedback. Control mode, the real-time performance of this method is much worse, and the latter power tube needs more redundancy. Compared with the post-feedback control, the pre-real-time control has high technical content and is difficult to implement. However, because of the precise control, although the R&D cost is increased, the heat generation is reduced, the power tube redundancy is reduced, the device volume is reduced, and the device volume is reduced. There are many benefits to reducing the hardware cost of the equipment, so the industrial power supply I am doing now goes towards this highly accurate idea. For example, the phase of the high-frequency induction heating power supply, I use 50MHz speed to observe the working waveform of 500~1MHz, real-time phase locking.

Finally, I conclude that there are three realms in the use of oscilloscopes, one is outside, as a measurement tool; the other is in the mind, as logical reasoning; the third is to do real-time monitoring of equipment operation inside the equipment.

1.2mm Shelf Header Led Display

LED Shelf Signage,LED Display Shelf,Digital Shelf Edge Displays,Outdoor Rental LED Display

Shenzhen Uhled Technology Co., Ltd. , https://www.uhled.com