Four ancient timing tools

In ancient times, the four main timing tools were dial, sundial, lettering and armillary sphere.

1, standard table

Watches are the oldest timepieces in China with a long history. Standard gauges use the length of the sun's projection to judge time. Guiyu consists of two parts, one is the benchmark or stone pillar that stands upright on the flat ground to measure the shadow of the sun, called the table; The other part is a rigid plate that measures the length of the table due south and north, which is called Gui.

2. Japanese regulations

The original meaning of a sundial refers to the shadow of the sun. Modern "sundial" refers to a kind of timing instrument used by ancient humans to measure time, also known as "sundial". Its principle is to use the projection direction of the sun to measure and divide time, which usually consists of a needle and a plane. The sundial timing method is a great invention in the field of astronomical timing, which has been used by human beings for thousands of years.

3, tick off leakage

Cleavage is an ancient time tool, which was used not only in ancient China, but also in ancient civilizations such as ancient Egypt and Babylon. The age of the invention of the missing carving has been impossible to verify. According to historical records, the missing carving appeared in the Western Zhou Dynasty. The clepsydra consists of a clepsydra and a ruler. The clepsydra is used to drain or hold water. The former is called drainage clepsydra and the latter is called water receiving clepsydra. This ruler is used for timing. When in use, it is placed in a pot and moves up and down with the change of water level in the pot.

4. armillary sphere

The water-powered armillary sphere timer also came out. According to legend, Zhang Heng's armillary sphere powered by water in the Eastern Han Dynasty can accurately record the sunrise and stars. In the Tang Dynasty, the eminent monks, their entourage and Liang Lingzan designed the first generation of water-borne armillary sphere, which can imitate the movement of celestial bodies and measure time.

Modern timing tools

1. Watch: A watch, also known as a wrist watch, refers to an instrument worn on your wrist to time and display time.

2. Stopwatch: Stopwatch is a commonly used timing instrument, also known as mechanical stopwatch. It consists of pause button, clockwork handle, minute hand, etc. It is timed by controlling the rotation of the hands through the synchronization of the pendulum.

3. Electronic clock: An electronic clock is a timing device that displays seconds, minutes and hours with a digital circuit. It has the advantages of accurate time, intuitive display and no mechanical transmission device, so it is widely used.

4. Smart phone: Smart phone has powerful performance, strong operability and excellent entertainment, which perfectly integrates the timing function into the communication function and entertainment function. So smart phones are also the most popular timers.