What is the working principle of radio watches? What are their characteristics?

- Apr 25, 2019-

The airframe of the so-called radio meter is composed of atomic clock and radio receiving system. It is sent out by the National Time Service Center. The time received by the radio receiving system and displayed by CPU will not exceed one second in 300,000 years. Simply put, it is a watch that can automatically check the time after receiving the standard time information. Radio clocks and watches are the fifth generation of timers in the development of human timing technology, following hourglass, sundial, mechanical clocks and quartz clocks. The emergence of radio clock technology and products is another revolution in the history of human timing.


What are the characteristics of the radio meter?


Radio clock combines traditional clock technology with modern time-frequency technology, microelectronics technology, communication technology and computer technology. It receives the standard time signal transmitted by the national time service center by radio long wave. After decoding and processing by the built-in microprocessor, it can automatically calibrate the time of radio clock display and the standard time maintained by the state. Keep accurate synchronization.


The National Time Service Center of the Chinese Academy of Sciences, in cooperation with Xi'an Gaohua Electric Industry Co., Ltd., has developed new technology of low frequency time code radio time service, devoted itself to promoting the development of China's radio clock technology, and introduced radio clocks with China's own intellectual property rights, making China the fifth country in the world to realize the civilianization of long wave time service technology after Germany, the United States, the United Kingdom and Japan.


The working principle of radio watches:


1. Automatic reception


After loading a No. 5 battery (here refers to the radio clock), the second hand will be positioned at 12 o'clock. Then, the clockwise and minute needles will be located at one of the three positions of 4:00, 8:00 or 12:00. Then, after the three needles are positioned, they begin to receive, and the three needles are in a static state. After the normal receiving time, the needle quickly reaches the standard time position, which takes about 4 minutes. If the signal is not received, the three needles are in a static state.


2. Manual reception


In the normal running state, the setting key (SET) is pressed for more than 4 seconds, at which time the watch needle begins to rotate to the next initial position (12:00, 4:00, 8:00 one of them), and begins to receive signals. The receiving time is not more than 10 minutes. When the standard time signal is received, the radio clock time will be adjusted to the received standard time; if the standard time signal is not received, the radio clock will return to the original time.


3. Quartz Clock Travel Time Model


Radio clocks can be used as quartz clocks in blind areas.


4. Explanation of Broadcasting Time and Signal Coverage of Broadcasting Station


This radio clock is suitable for receiving BPC (call number) time signal transmitted by the National Time Service Center of the Chinese Academy of Sciences.


Current signal transmission time


8:00-12:30;


22:15-0:15;


The good coverage range of time code signal is: centered on Pucheng transmitter of Shaanxi Province, the national time service center, with a radius of 1000 km (ground wave) and 2500 km (sky wave). The night time is the best time to receive the transmitted signal.


Due to the physical characteristics of wireless transmission signals, a small amount of bit error may occur in this product. If this happens, please restart to correct it.


As a radio receiving device, in order to reduce electromagnetic interference, please place the radio clock as far as possible 1 meter away from TV, computer and other electrical appliances. Better signal reception effect can be obtained by using or properly adjusting the placement direction and position of the radio clock near the window. There is a blind area for receiving radio signals.