1. Definition
Virtual reality (Virtual Reality, abbreviated as VR, also translated as spiritual realm, phantom reality) is a high-tech that has appeared in recent years, also known as spiritual realm or artificial environment. Virtual reality is the use of computer simulation to generate a virtual world in a three-dimensional space, providing users with visual, auditory, tactile and other sensory simulations, so that users can observe things in the three-dimensional space in a timely manner and without restrictions . VR is a comprehensive integrated technology, involving computer graphics, human-computer interaction technology, sensor technology, artificial intelligence and other fields. It uses computers to generate realistic three-dimensional visual, auditory, and olfactory sensations, allowing people as participants to pass appropriate devices. , Naturally experience and interact with the virtual world. When the user moves the position, the computer can immediately perform complex calculations and transmit accurate 3D world images back to produce a sense of presence. This technology integrates the latest developments of computer graphics (CG) technology, computer simulation technology, artificial intelligence, sensing technology, display technology, network parallel processing and other technologies. It is a high-tech simulation system generated by computer technology.
In a nutshell, virtual reality is a brand-new way for people to visualize and interact with complex data through computers. Compared with traditional human-computer interfaces and popular window operations, virtual reality has made a qualitative leap in technical thinking.
"Reality" in virtual reality generally refers to any thing or environment that exists in the world in a physical sense or a functional sense. It can be practically achievable, or it can be practically difficult to achieve or impossible at all. . And "virtual" refers to a computer-generated meaning. Therefore, virtual reality refers to a special environment generated by a computer. A person can "project" himself to this environment by using various special devices, and operate and control the environment to achieve a special purpose, that is, a person is such an environment. Dominate.
Second, the basic characteristics of virtual reality
1. Multi-Sensory
The so-called multi-perception means that in addition to the visual perception of general computer technology, there are auditory perception, force perception, tactile perception, motion perception, and even taste perception and smell perception.
2. Immersion
Also known as presence, it refers to how realistic the user feels as the protagonist in the simulated environment. The ideal simulation environment should make it difficult for users to distinguish between true and false, so that users can devote themselves to the three-dimensional virtual environment created by the computer, just like the feeling in the real world.
3. Interactivity
Refers to the user's operability of objects in the simulated environment and the natural degree of feedback from the environment (including real-time).
4. Imagination
It is emphasized that virtual reality technology should have a wide imaginable space, which can broaden the scope of human cognition, not only can reproduce the real existence environment, but also can freely conceive the objective non-existent or even impossible environment.
Since the first letter of an English word with three characteristics of immersion, interactivity and conceivability are all I, these three characteristics are generally collectively referred to as 3I characteristics.
3. Application of Virtual Reality in Education
1. Scientific and technological research
At present, many colleges and universities are actively studying virtual reality technology and its applications, and have successively established virtual reality and system simulation laboratories, which have rapidly transformed scientific research results into practical technologies. Virtual experiments can use virtual reality technology to establish various virtual laboratories. , Such as geography, physics, chemistry, biological laboratory, etc., have advantages that traditional laboratories cannot compare with:
1) Cost savings. Usually we are limited by hardware such as equipment, space and funds.
2) Avoid risks. Real experiments or operations often bring various dangers. Using virtual reality technology to conduct virtual experiments, students can safely do all kinds of dangerous experiments in a virtual experiment environment.
3) Break the limitation of space and time. Using virtual reality technology, you can completely break the limitations of time and space.
2. Virtual training base
Using virtual reality technology to build a virtual training base, the teaching content can be continuously updated, so that practical training can keep up with the development of technology in a timely manner. At the same time, the immersion and interactivity of virtual reality enable students to play a role in the virtual learning environment and devote themselves wholeheartedly to the learning environment, which is very conducive to student skills training.
The tripod Turnstile Gate is suitable for all kinds of places that require pedestrians to pass in an orderly manner after verification.
Advantage
1. Fully rainproof tripod barrier gate cabinet made of stainless steel. Compared with pedestrian access equipment such as wing gates and swing gates with general functions, the tripod baffle gate are more cost-effective and good-quality.
2. RFID tripod turnstile gate has a personalized installation interface (such as card reader, indicator light installation, etc.) to ensure that the control gate equipment of the system integrator is simple and convenient during installation.
3. The movement of the 3 arm tripod turnstile gate has an automatically adjusted hydraulic shock absorber. When the tripod turnstile is used, the sound is very small and there is no impact, and the brake lever automatically decelerates and returns to the center. The surface of the movement is electroplated with yellow dichromate.
4. Semi-automatic tripod turnstile gate can be programmed with gate control, one or two direction control (set by the user).
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