Chatting with a group of friends, I mentioned the oscilloscope, and everyone agreed it's an essential tool for observing waveforms. At the time, I said I don’t use it as much as possible, but I still encouraged my colleagues to make full use of it. Many netizens were curious—why would someone not use an oscilloscope if it’s so useful?
Here’s my explanation: The oscilloscope is indeed a powerful window into waveform behavior, and using it can help identify anomalies quickly, which is why I encourage others to use it to improve efficiency. However, over-reliance on it can dull your analytical and reasoning skills. I value my ability to think critically and logically, especially in situations where the oscilloscope isn’t enough.
For example, the discovery of Pluto wasn’t just about observation—it started with theoretical calculations. Astronomers first predicted its position based on gravitational effects, then used telescopes to confirm it. Without that theoretical foundation, finding Pluto would have been nearly impossible. That’s the power of logical reasoning.
Another example comes from the early days of high-frequency induction heating systems. A customer reported occasional large power output, which wasn’t obvious at first. After several units were shipped, the issue became more frequent. We spent two days trying to reproduce it, and even after replacing parts and checking with an oscilloscope for a week, nothing showed up. The problem was hidden in subtle waveform changes that weren’t visible through long-term observation.
I had to go back to the basics, analyzing the waveform step by step. Eventually, I found that when the resonant phase lock was off, there was a dead zone offset in the H-bridge inverter. This wasn’t visible directly from the waveform because the phases looked similar. But by carefully analyzing the turning points, I identified the issue and adjusted the phase lock to resolve it.
Medical tools like B-ultrasounds are similar to oscilloscopes—they allow even non-experts to diagnose problems with training. However, this reliance on technology can weaken the doctor’s own diagnostic abilities. I’m not against using oscilloscopes; I just want to ensure that my logical thinking stays sharp. My reasoning skills are built on experience and the initial use of these tools, which is why I encourage beginners to use them extensively.
Later, I met an old gentleman from Hong Kong who had studied advanced technologies in the U.S. He taught me about high-precision design concepts—embedding high-speed signal acquisition devices in industrial equipment, effectively turning them into real-time oscilloscopes. These systems sample at speeds many times higher than the working frequency, allowing for real-time analysis and pre-control. Unlike traditional post-feedback control, this approach offers better performance, reduces heat, and lowers hardware costs. It’s more complex, but the benefits are worth it.
In conclusion, using an oscilloscope has three levels: first, as a physical measuring tool; second, as a mental framework for logical reasoning; and third, as an embedded system for real-time monitoring inside the equipment. Each level brings different insights, and mastering all of them leads to deeper understanding and better engineering.
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