There is a timing tool for each period. You can know the time using the tool to avoid being late for work. Gui watches appeared in the Shang Dynasty, chronographs appeared in the Han Dynasty, and ceremonial tables for water transportation appeared in the Song Dynasty. The Song Dynasty aquatic instrument platform realized automatic time reporting, which was a major breakthrough in ancient timekeeping tools.
The Kyuubiao is actually designed based on the principle of shadow mapping. A bamboo pole is installed on the ground, andit analyzes the time it is located based on the projection of the bamboo pole on the ground. on the groundto avoid being late for work. There are usually ladders on the ground. Over time, the projection of the bamboo pole will become longer or shorter, in order to calculate the time.
Leak timing involves calculating the time based on the decrease in the water level in the kettle. A leaking kettle is the equivalent of a quarter of an hour. A quarter of an hour is approximately fifteen minutes. This type of timing is relatively precise. It was already very good to be able to achieve such timing in ancient times. However, this timing tool also has some flaws. Someone has to be responsible for adding water, so it remains relatively impractical. Depending on the hidden timing, the elders could know roughly what time it was and would not be late for work.
In the Song Dynasty, someone invented the water instrument platform, which was a major engineering feat. This Water Transportation Instrument Platform will tell the time every quarter of an hour, which is very magical. In ancient times, ordinary people did not haveThere is no such luxury. Many ordinary people knew, thanks to the guard, what time it was and whether they should get up and go to work. There are five watches per night. After the second watch, people must stay at home and wait for the corresponding time before going out. In ancient times, guardians were very important. Without them, many people would not be able to live normal lives and would likely be late for work every day.
To answer this question, we must first understand the origin of sound. Sound is formed by the vibration of the medium. There is air in the sealed bag, not vacuum. He was pumped. Air is a medium that can transmit vibrations to the water outside the sealing strip. Water is also a medium which in turn transmits vibrations to the outside air. . It gets into people's ears and they hear it.