Security rescue equipment and technology

Recently, the Internet madness was reported on December 21, 2012 as the end of the world, and the Hollywood movie "2012" was even more popular to promote this theory. In order to avoid the panic that the “doomsday” brings to the public, the United States’ NASA issued a video in advance to refute the rumors of the last days and expressed confidence that in the next 4 billion years, the world will still run as ever. As we all know, doomsay rumors are just Internet rumors, and killing rumors requires scientific power. Recently, multinational scientists put forward various evidences to refute rumors, which reflects the power of science. Similarly, in the field of security, the power of science is rising and various security and rescue technologies applied to disaster relief have emerged. We carefully review security and rescue applications from physical equipment to science and technology.

I. Disaster Rescue Security Technology

Low light technology

At the scene of general disaster relief, lighting is not conducive to rescue. Low illumination refers to the effect index of an ordinary camera that uses its own lens to perform imaging in a place where the light is extremely weak without the aid of an auxiliary accessory such as an infrared lamp, and is expressed in units of Lux. In general, most surveillance cameras currently use active infrared for night vision. At present, there is a new technology that can greatly improve the ability to monitor the camera's low illumination. The general surveillance camera can perform night vision through its own lens on the basis of no infrared, and the imaging is clear and stable.

As the saying goes, there is demand to drive research and development. Does the emergence of low-lightness surveillance cameras mean that infrared imaging technology used for many years has many deficiencies that need to be improved? Indeed, although active infrared imaging is the most popular night vision technology, its weakness is also very obvious. At present, the application of low-lightness surveillance cameras is not very common, and the difficulty of high-price technology is the two main reasons for restricting it. However, as a crucial night vision technology in video surveillance, it will be favored by people in the future.

Intelligent Analysis Technology

Intelligent analysis is a popular monitoring technology in recent years. Intelligent automatic analysis saves a lot of valuable time for security and rescue. Smart technology is software that realizes its own value through video surveillance equipment. It makes video surveillance more convenient and accurate through current intelligent technologies. At present, smart technologies are mainly divided into two technologies: smart identification and intelligent analysis. The intelligent identification technology is mainly used for face recognition to identify and compare strangers and suspects to confirm the identity of a person. Intelligent analysis is mainly used to analyze the flow of people, road conditions, analysis and monitoring of the scene and so on.

Compared to traditional video surveillance, video surveillance equipped with smart technology can analyze dangerous situations within the first time and promptly report to the police. You can use face recognition to identify and track suspects who are hiding in the crowd. At the same time, intelligent analytics can perform an unequal, high-quality analysis on an area, calculate the number of people appearing at each time period, recurring people, and video clips that can shorten the video clips to shorten the highlights. These functions can greatly improve the quality of video surveillance, allowing people to reduce fatigue when conducting security monitoring, so that the monitoring is more efficient.

Internet of Things Technology

The Internet of Things can also provide shock and seismic services. It connects various things with sensors through the network. For example, British researchers use RFID and sensors to monitor houses in an earthquake. This uses Internet of Things technology. They called the prototype built in Greece a self-healing house. This kind of house has specially designed the gap space in the wall, and the wall has added the material that can become the fluid under the strong pressure. If the pressure caused by the earthquake, the fluid back into the gap will not affect the solid wall. As a result, the home remains, but it may move. If the building does not collapse, the data collected through RFID and sensors will be used to determine the positional offset. In addition, RFID tags and sensors in the building can jointly build an alarm system to alert the upcoming earthquake.

Second, disaster relief and security equipment

Earthquake alarm monitors the disaster

The study of the Chinese and foreign earthquake records and the latest scientific research results show that the geomagnetic field has obvious anomalies 30 hours before the major earthquakes, especially in the epicentral region. The magnetic anomalies were especially severe before the impending earthquake. The earthquake alarm can detect the characteristic magnetic anomaly signal before the earthquake. In general, there will be many aftershocks after each major earthquake. Because the large earthquake has caused damage to the housing construction, the arrival of aftershocks will cause these insubstantial objects to collapse, causing even greater casualties. Therefore, the use of seismic alarms to monitor the new earthquake becomes more important.

For example, during the Wenchuan earthquake, the first civilian seismic alarm was first successfully alerted in the aftershock of Qingxi Primary School in Qingchuan County, Sichuan Province, where the earthquake was severely affected. This earthquake alarm can alert earthquakes via the Internet. The alarm can detect both longitudinal (P-wave) and transverse (S-wave) waves and perform voice alarms. The arrival of vertical and horizontal waves of earthquakes has successively, and the destruction of longitudinal waves with relatively fast speed is relatively small. This civilian earthquake alarm has three lights, and once it's working, the light will flash. On the other side of the alarm, there are three low-middle and high-sensitivity dial keys. The alarm level is divided according to the intensity of the earthquake. When the low-scale is dialed, the earthquake alarm will alarm in the case of intensity of 7 degrees. When it is set to high scale, When the intensity is 5 degrees, it can signal. At the time of the earthquake, its prophet reserved 28 seconds to 35 seconds for life. Once it was trapped, it could send SOS wireless distress signals and spread it 300 meters away.

Public broadcasting is the first choice for emergency rescue

Public broadcasting is broadcasting that serves the public in a limited range. In the conventional case, the public broadcasting signal is transmitted through a broadcasting line laid in a broadcasting service area, and is a one-way (down-to-date) cable broadcasting. It is usually installed in communities, institutions, military units, companies, schools, buildings, supermarkets, and various venues. It is used to publish news and internal information, release information, provide background music, and use it for paging and forcibly inserting disaster accidents. Broadcast and so on. Therefore, it has become an indispensable part of various public places in urban and rural areas and modern cities. It is believed that before the collapse of the World Trade Center in the 9/11 earthquake that shocked the world, its public broadcasting system must play an important role in saving lives.

The sudden pain and threat that sudden accidents have brought to people's lives and property have forced us to think in depth about how to deal with unexpected accidents in order to reduce the damage to people’s lives and property in the event of an accident. Broadcasting has the advantages of simple construction, convenient installation, long transmission distance, wide transmission range, and high transmission speed. It has played a decisive role in the emergency forecast, emergency command, emergency evacuation, and emergency settlement of many sudden accidents in the past. Means and methods cannot be replaced. Especially in the event of traffic disruption due to disasters, power supply and communication are more obvious. The snowstorms in southern China and the Wenchuan earthquake in Sichuan have provided strong evidence that the government has distributed tens of thousands of radios to the victims and disaster relief officers.

As a management tool, public broadcasting is also of great importance to public safety, especially in public-intensive situations. For example, during the Spring Festival 2008, severe snowstorms occurred, and Guangzhou Railway Station had hundreds of thousands of passengers stranded. High-power public broadcasting systems played a very important role in grooming the public and ensuring the order and safety at the scene. Shanghai World Expo initially had the idea of ​​"quiet Expo" and did not plan to establish a public broadcasting system. Fortunately, this idea was later negated. When hundreds of thousands of viewers flooded in, besides public broadcasting could not help the crowd, the public address system did contribute to the safe and orderly operation of the Expo.

Video surveillance provides first-hand material

As an auxiliary system for earthquake relief emergency liaison command, the video surveillance system, video surveillance, video conference and other data communication systems play an important role in the notification of dangerous situations, command and rescue, and emergency assistance, and it is a traditional voice communication system that cannot be replaced. In addition to video surveillance and video conferencing systems, converged data communications services such as telemedicine and distance education have also played a significant role in earthquake relief.

The video surveillance system provides a great deal of first-hand on-site information for emergency commanders in the fight against earthquakes. In addition, the wireless video transmission system is also an assistant to the rescuers. It not only photographs in places where people cannot enter and returns images in real time, but also enables remote consultation when rescuers are injured.

Life detector looking for signs of life

Life detector is a new technology developed in recent years. It is a high-tech rescue equipment for detecting signs of life. The principle of the life detector is that as long as it is life, there will be many special life information in the body. These life information will be expressed on the outside of the body through various energy modes, such as sound waves, ultrasonic waves, electric waves, light waves, and some Earth people still present. The special waves that are not mastered, such as the special waves generated by the brain during its activity, have different frequencies and naturally emit completely different energies. It is through the detection of these different waves that the life detector detects such waves. Different life forms that appear on the screen.

Life detectors include optical life detectors, thermal infrared life detectors, sonic life detectors, and radar life detectors.

Optical life detectors are commonly called "snake eyes" and use light reflections for life detection. The main body of the instrument is very flexible and can twist freely in the rubble. There are small probes in front of the instrument that can penetrate into the tiny gaps. Similar to the camera equipment, the information is sent back. The rescue team can use the viewer to clearly see the depths of the rubble. The thermal infrared life detector has a night vision function. Its principle is to judge different targets by sensing the temperature difference, so it can work as usual in the dark.

The Sonic Life Detector can search for faint sounds. Even if the victim is trapped under a fairly solid large-area concrete floor, the detector can feel it as long as the heart still has a slight tremor. Radar life detector is a life detection device integrating radar technology and biomedical engineering technology. It is mainly made by using the principle of reflection of electromagnetic waves. By detecting various micro-motions caused by human life activities, information on breathing and heartbeat can be obtained from these micro-motions, thereby identifying whether there is life. Radar life detector is currently the most advanced life detector in the world. Its active detection method makes it difficult to be affected by factors such as temperature, humidity, noise, and site topography. The continuous emission mechanism of electromagnetic signals further increases its regional detection. The function.

In addition to these, there are many other rescue tools in the earthquake, such as search robots, search dogs, GPS positioning systems. With the advancement of science and technology, it is believed that more advanced high-tech equipment for earthquake relief will emerge. Disasterless people are sentimental. It is the role played by high-tech equipment that has saved countless precious lives.

Conclusion:

It is very important to popularize the knowledge of security and rescue products. For disaster relief projects, the future development of security products is still very long. We don't need to worry about the 2012 doomsday. We should treat the problem scientifically and rationally. We must not create unnecessary psychological panic from people and clouds. Perhaps a few years later, security products will be able to provide society with a more accurate and timely warning of disaster conditions.