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Scientific and educational instruments: introduction to the mechanical principle and structure of the three-ball instrument
Scientific and educational instruments: the three-ball instrument controls the operation of the sun, the moon and the earth through mechanical and electronic devices, which can directly show the basic and typical operation state and trajectory of the "three balls" in the solar system, and can reflect the mutual position relationship between the three on any day in the four seasons of the year and their respective revolution, rotation, speed, orbital inclination, etc., and vividly demonstrate the actual operation of celestial bodies, to make it easier for people to understand and understand this astronomical knowledge.
2020
08-27
Three ball instrument how to use?
The three-sphere instrument is used to teach the earth, the moon's revolution and rotation, the day and night change, the four seasons change, the cause of the eclipse of the sun and the moon, and the change of the moon's phase.
08-17
What kind of scientific and educational instruments are divided?
In order to promote the development of scientific research and education, the instruments and equipment used for scientific research and teaching are called scientific and educational instruments. The instrument refers to the instrument or device used in science and technology for experiment, measurement, observation, inspection, drawing, etc.
08-12
Physical instruments: a detailed introduction of the three-ball instrument
Physical instruments: the three-ball instrument, also known as the lunar-earth operator, is a tool for the teaching and popularization of astronomy. It consists of three balls representing the sun, the earth and the moon, and has a mechanical linkage to demonstrate the relationship between the three balls, resulting in some astronomical phenomena.
08-07
Qinghua Science and Education takes the lead in undertaking another major national scientific instrument and equipment development project
The industrial online chromatograph developed by scientific instruments has advanced principles and high technical content, which can improve the online monitoring and measurement level of environmental pollution and petrochemical industry in China.
07-28
How to Forecast Haze, Qinghua Experimental Instruments to Help
With the Qinghua experimental instruments, the ground network cannot be less. In 2015, the Chinese Academy of Sciences set up a joint air quality observation network composed of 40 stations (points) across the country, and a ground monitoring network composed of 16 international standard air quality observation stations in Beijing, Tianjin and Hebei.
07-25
Experimental instrument Dynamic training device model Metallurgical process model
The experimental instrument dynamic training device was designed by Xiangtan Iron and Steel Co., Ltd. according to the actual production process of the metallurgical industry, and was produced and installed by Tsinghua Science and Education Instrument Co., Ltd., with a total investment of 3.84 million yuan and a construction area of 150 square meters. It was completed in December 2018. It mainly undertakes the practical teaching task of the core curriculum of experimental instrument specialty.
07-17
Differences between different chemical models
Just as there are many kinds of things, chemical models are no exception. We now say that the chemical model is the general term for all chemical models. But in fact, there are many kinds of them, and they are also very different.
07-13
The sky and earth net to catch haze scientific instruments to help
Outside the mountain, when will the haze in my hometown stop. What are you most concerned about this winter? Smog! Recently, smog has occurred frequently in many places in my country, and Beijing-Tianjin-Hebei and surrounding areas have become "severe disaster areas" again ". With the sound of early warning, the anti-haze war is on the verge of breaking out.
07-10
The composition of the teaching instrument microscope is one-sided.
The microscope used by primary school students has a magnification of 200 times and consists of several parts such as a mirror base, a mirror column, a mirror arm, a lens barrel, a quasi-focal spiral, a stage, a reflector, an eyepiece, an objective lens, etc.
07-07
