Academician Hu Junhao of Chinese Academy of Sciences: from the development of Internet of things and sensors to see the wisdom of the Earth

The "2012 International Optical Fiber Communication Forum" co-sponsored by the party committee of the Inner Mongolia Autonomous Region, the Optical Communication Committee of China Communication Society, the fiber optics and integrated Optics Committee of China Optical Society, was held in Hohhot, Inner Mongolia, August 11, 2012 12th. Hu Junhao, academician of the Chinese Academy of Sciences, made a keynote speech on the subject networking and sensors.

Hu Junhao:

Good morning, everyone! Let me talk to you about the development of the Internet of things and sensors. The hottest concept now is the wisdom of the Earth, a concept IBM introduced in 2008. What is the wisdom of the Earth? is the Internet plus things networking. The Internet of Things is the connection of the information obtained by the system through the sensors. For example, we now each person to put a heart sensor, if a certain gentleman his heart is now a bad wave out, wireless communications send your signal to the medical center, the Medical Center for analysis, this analysis is machine analysis, and then do to go out to judge. Then there is monitoring, immediately send a doctor to send the medicine to this person here, tell him to eat this medicine, do not eat down may cause problems. For example, this device is placed at a certain pier, which has a problem, but also through the network of things to analyze the sensor. The information of the object is transmitted through the sensor, then the intelligent device management, sensor so very important, it is actually replaced the eyes, skin, is to extend our senses, and very sensitive and so is the virtual auditory system, visual system and virtual sensory system, and then to the Information Center for analysis and judgment, Make decisions later.

So this produces the production data, where does the production data come from? It's from the sensor. Such a concept can be further expanded, such as the example is the wisdom of medical care, we can also expand to intelligent energy, such as wind, solar and current fire power, is not able to be very coordinated to distribute it? Arrangement? Smart Grid. can also be extended to equipment, including intelligent finance and insurance. Look at the financial bubble blowing big is not going to break? can raise an alarm.

Smart traffic is now being done in many cities. All of these are sensitive people, and getting data and sensing is a very important aspect.

The Internet of things is very relevant to the acquisition of optoelectronic Science and technology information. The Internet of things is processed by all kinds of information acquisition, and the judgment finally forms the wisdom Earth and perceives China. Here are some examples of sensor development:

This is a variety of sensors, the horizontal axis is the wavelength, ordinate is the sensitivity. For example, the photon-type infrared detectors, our country in 1987 Tangdingyuan academician pioneer and research.

The development of infrared photoelectric sensor technology, including large-scale high gain, multi-color, improve the working temperature, expansion band, intelligent. We can make the axial wave and short wave can also be made 1kx1k, can also do 1024x1024 can better imaging. We can also do growth wave ir. We also used our 1500-yuan long wavelength infrared.

This image is a Wenchuan earthquake, I can't take it down, it's a satellite from the United States, when our satellite was not on the Wenchuan, at that time with the United States they coordinate, is not able to see our earthquake situation, our side because the signal was not at the time, please their keyhole satellite detection, This satellite is an optical imaging military satellite, which can be seen from this phase is 200 kilometers high, very clear. (Fig) This image was taken on May 19, we took this phase on the plane on May 22, the two are exactly the same, but our plane is a height of 2 decimeter, their satellite height is more than 200 meters, it can be seen that their technology is very advanced, we still have a long distance.

So the first time was large-scale. The second is polychromatic. Many are different bands, two bands, three bands, it is conducive to judgment, get a good analysis, optical communication to pass the past signal to be judged, so need multi-color. For example, a term is a PMG band diagram, another term is another PMG band graph, the second term is the third PMG Band of the graph, so the first, second, third band is a different graph. And, of course, a dual-band detector can be made. This can be like a long wave, the middle wave, you can determine what is the sky is not the power of the flying body, or a dynamic flying aircraft or rockets? can be analyzed.

Large-scale LW/LW dual-color infrared focal plane: for example, the visible light, the wave used in the figure, Wave 2 used in the figure, such as the aircraft with the engine, its diagram and no engine analysis results are not the same.

Because the sun has a spectral composition, we need to get some data, such as sunlight its flicker is with the wavelength of change, such as 3.8 microns, 300 degrees of target radiation than the sun flashing more severe. and less than 3.8 microns below, the sun is shining more than severe. These five data should be studied to provide you with information to judge. Also its Tepo rate, in different environments, 3.5 microns to 3.8 microns is not the same, this data can also provide you with analysis. For example, this picture can not see the sea of things, this picture will be seen on the sea of the island Coke and so on. So different bands make different judgments, and the information travels through the wireless or optical fiber, and it can be published. So the sensor for the construction of the Internet of things is very important.

For example, Japan's March 11 tsunami, the sky similar to the flow of wind, to March 14 nuclear explosions, some people say is not counseling to Shanghai, through the analysis of no such phenomenon.

Another is to improve the working temperature, hope to be able to improve to work at room temperature, then the effect will be more convenient. Now the better is, for example, many islands, and no one to land, then you can put the sensor there, through the solar electromagnetic, and then through the wireless, the data when the real transmission over.

The important application of pyroelectric detectors in space, as well as the Earth-leveling instrument, in the end how much lay out on the planet, how much data? In particular, the Earth's radiation budget is very important, such as how the sea temperature rises at one point, how the change is, and the Earth's radiation budget is related, these data are analyzed on the Earth's climate change, especially these annual climate anomalies, can be analyzed through this is very important. These are the sensors that need to be used to get this information, so that the information can be better analyzed. We can also use it for different imaging, this is a new technology, there is a PVDF imaging detection rate is better.

The other is very long wavelength tellurium cadmium mercury infrared Coke, high power THz source and high detection rate detector, it is particularly sensitive to water, it is easy to detect water quality situation. Its imaging laws can be produced by means of optics and electricity. It has triys for example, it can pass through the leaves, but also through the human body, and no harm to the human body. This light can pass through the human body, so people dress like they do not wear clothes, and no harm to people. For example, now X-ray to check, is the impact on people, but triys this is no impact on the human body. These data can be transmitted through optical fiber or wireless sensor, and can get a great amount of information. The THz band is more controlled by water quality. , sensors can now be used in astronomy and galaxies as well.

From the infrared information acquisition There is also a spectral image, so the sensor can not only Germany image, like, can also do a spectrum, such as my face shot down, on my face every point can do a spectrum, such data is three-dimensional data, two-D is XY data, the other is the spectrum, then the amount of data is very amazing. So it not only includes intensity, wavelength, phase, polarization and recognition, its users are very large, can imaging spectra. For example, the region, the spectrum of its make, and the computer in contrast to the oil material, people can run to this place to see if there is no gas, if such a large area without the target is very difficult to find. In Xinjiang region to find a gold deposit is like this, first imaging spectra, if you feel this place like, and then send people to the past. For example, agricultural crops, in the end is not mature? In the end is 1000 kg per mu or 10,000 kg? Remote sensing if it is green, clear, the spectrum is so, if it is 500 kg per mu and 1000 kg per mu, the spectrum is not the same, so the amount of information and data are very large. Just now the academician of tungsten said that we are moving towards a big data age, and the big data brings us challenges and opportunities. We get so much information, so much information, but it's very important to have a good analysis and a lot of wealth.

Modern sensor technology includes a variety of, such as infrared, y-ray, pressure, vibration, electromagnetic, chemical, biological, single photon, X-ray and so on, all of these sensor information can be placed on the internet of things, judgment, analysis to make a conclusion. This is a very important aspect of the future development of the Internet of things.

Development of micro-pressure sensing technology, using high resolution resonant sensor mechanism, using nano-electromechanical system technology, the development of micro-quality, force or angular momentum and other sensitive sensors. For example, a sensor such as a TNT molecule, such as the fluorescence quenching effect of a specific fluorescent polymer based on an explosive molecule, is used to determine whether an explosive molecule appears in a tested sample by detecting the intensity of the polymer fluorescence. If you have dynamite in this bag, you can put it in a bottle, but there will be some molecules out there, as long as there are a few molecules, then its sensitivity will have amplification effect. So a test will tell you it's dynamite.

Chinese Academy of Sciences Shanghai for the system Chengjian to solve the problem group, the development of fluorescent polymer explosive detectors used for security checks, including the application of the Expo, if this set of things is TNT, to study different polymer materials, different sensitivity materials to provide us with the sensor data in the Internet of things. So the whole future will form a wisdom empty world sea integration. Why is our weather forecast so accurate, the eye of the sky is looking, the sensor looks above, our modern warfare technology, information technology, also must use this. We apply the concept of Internet of things to intelligent transportation, intelligent city, intelligent finance, intelligent medicine, intelligent water system, which has a lot of work to do. All the working process of the sensor is more important. After the information is received, the information behind the work more, so much data, is a variety of technologies, including optical communication and wireless communication technology all have a very big development inside.

So all kinds of sensors, all kinds of information acquisition, processing judgment, decision-making finally formed an intelligent Earth, wisdom Earth, wisdom around is also now our new industry development in a very important step. Optical fiber communication over the past 90 years is very popular, then do not know how to give wireless sensor than go on, and now come back. Optical fiber communication and wireless sensing are all large data systems in the Internet, one is the function of information transmission and many other, it also has many other functions. So we are in the internet of things, sensors, this conference the theme of optical fiber communication in the era of great development, in the last few years in our country, in the world will be developed.

Thank you!