Thursday, April 16, 2015
Various possible applications of wireless optical communication has slowly emerge
Optics in the semiconductor, electronics, using a wide range of ICT industries, such as optoelectronic semiconductors can be used as LED lights, lighting; Opto Semiconductors CCD, CMOS image sensors do digital cameras, digital surveillance, micro-electromechanical systems do DMD projector; Phototransistor, couplers for automatic control.
Or optical storage, such as Blu-ray Disc BD-chip; or optical communication, such as FTTH FTTH broadband, and optical communications is actually divided into wired and wireless, wireline, such as fiber to the House, that xPON various passive optical network; or large enterprise IT room, storage area network SAN within the data centers used; consumer electronics field, as in the past Sony MD with optical S / PDIF audio transmission line; or in the professional video editing regard, Apple Mac optical version Thunderbolt (referred TBT) transmission line.
Cable transmission of light has been used a lot, but rarely use wireless transmission, especially in the field of consumer end, almost all stay in the IR infrared remote control stage, and then the last few years people began to advocate the visible wireless communications VLC, estimated future a few years there will be a new development.
Why wireless optical communications to start showing off? Because the existing Wi-Fi in 2.4GHz spectrum resources have been squeezed almost to the limit, you want a faster rate, almost all to consider the 5GHz band, IEEE 802.11ac is the case, LTE-U is true, but not the global access 5GHz The band, some countries can not be used, or only partially used, conditional use (not for outdoor use, or may not exceed the number of transmit power).
In addition to 2.4GHz, another global access is available band 60GHz, but because the band is too high, the relevant design are highly difficult, is still developing. Plus LED popularity, people began to consider the use of wireless communication to accelerate the transmission of light in the region.
About this, the most representative of the technology for Li-Fi, has demonstrated over the 2014 CES, the fastest way transmission 150Mbps, two-way down to 110Mbps, in fact only a single antenna 11n Wi-Fi is almost, but the future There greatly enhance the potential of up to 1Gbps, 10Gbps than standard lights and colors currently available to improve the rate of increase, and the other is a channel such as a red LED, green LED is also a channel and so on.
Two other advantages of wireless optical communications, one from electromagnetic interference, although the current flight regulations allow passengers to use electronic products, and medical equipment in hospitals is important to use the room on the plane, are buried in the walls of the copper network in order to avoid interference from mobile phones, but there is still cause interference, in these sensitive sites use optical wireless communication, you can avoid interference.
Another is the power, the drive to pass the signal LED light off, more power than the RF radio frequency signal transmission mode, the handheld device battery power cable, optical wireless transmission would be more favorable. But optical wireless communication has its drawbacks, such as once shading can not receive, such as people walking, can not communicate through the wall, unless the wall can light.
Li-Fi direct vision combined with daylight plate LED bulbs, we can provide in-room wireless Internet HotSpot hot spots, while the phone more than a LED flash and CMOS camera lens, equivalent to already have the ability to close out of one, the future of inter-phone can easily pass information.
In addition to Li-Fi, the Japanese also developed indoor positioning IPS (Indoor Positioning System) with lighting, similar to Bluetooth Low Energy's Beacon indoor location, so you can be more energy-efficient.
Wednesday, April 15, 2015
Altera added Internet industry alliance to promote global ecosystem of Things
Altera Corporation today announced that the company joined the Internet Industry Alliance (Industrial Internet Consortium, IIC), the industry organization aimed at promoting the development of global collaborative ecosystem of Things (IoT). In particular, Altera and alliance members to work together on the technology roadmap, developing Internet industry, in this intelligent devices and sensor networks, data exchange through different Internet protocols, and enhance the performance of a variety of end-market applications . IoT promise that this intelligent network connection can support companies to develop "smart" new business applications, assets and business optimization, simplification, or automate existing processes.
Dr. Richard Soley, executive director of the Internet Industry Alliance, said: "IIC has been at the forefront of industrial innovation and technological development of IoT We are very pleased to be joining Altera IIC, play to their strengths in FPGA and SoC solutions, and develop a more flexible and secure. IoT systems. "
FPGA support intelligent and flexible acceleration IoT gateway and analysis
Altera's highly customizable FPGA (field programmable gate array) and SoC (system on a chip) product enables designers to bridge a variety of wired and wireless interface standards IoT growing variety of applications safely. FPGA technology also supports data analysis and control functions to accelerate, including data centers as well as local and edge, which is the key to meet the emerging demand for IoT applications.
Altera industrial business unit director David Moore, said: "Altera technology will help IIC seek innovative ways to support the achievement of accelerated intelligent cloud platform and gateway platform, the acquisition and processing of various 'objects' of the input signal from the network edge of these platforms. can significantly benefit from Altera programmable hardware and software capabilities, the flexibility to meet the needs of distributed applications, while providing a cost-effective analysis and security capabilities to accelerate data center and IoT infrastructure. "
Altera FPGA, SoC, and power products have been in RF wireless systems and machine to machine communication networking plays an important role. In addition, the programmable logic is widely used in factory automation and smart grid, supporting high-performance control and analysis functions, to achieve an efficient, safe, secure advanced manufacturing and power systems. FPGA is also used for the next generation of automotive and medical IoT systems, and smart city applications, for example, the use of intelligent lighting and traffic management systems of high performance embedded vision and video analysis capabilities.
Dr. Richard Soley, executive director of the Internet Industry Alliance, said: "IIC has been at the forefront of industrial innovation and technological development of IoT We are very pleased to be joining Altera IIC, play to their strengths in FPGA and SoC solutions, and develop a more flexible and secure. IoT systems. "
FPGA support intelligent and flexible acceleration IoT gateway and analysis
Altera's highly customizable FPGA (field programmable gate array) and SoC (system on a chip) product enables designers to bridge a variety of wired and wireless interface standards IoT growing variety of applications safely. FPGA technology also supports data analysis and control functions to accelerate, including data centers as well as local and edge, which is the key to meet the emerging demand for IoT applications.
Altera industrial business unit director David Moore, said: "Altera technology will help IIC seek innovative ways to support the achievement of accelerated intelligent cloud platform and gateway platform, the acquisition and processing of various 'objects' of the input signal from the network edge of these platforms. can significantly benefit from Altera programmable hardware and software capabilities, the flexibility to meet the needs of distributed applications, while providing a cost-effective analysis and security capabilities to accelerate data center and IoT infrastructure. "
Altera FPGA, SoC, and power products have been in RF wireless systems and machine to machine communication networking plays an important role. In addition, the programmable logic is widely used in factory automation and smart grid, supporting high-performance control and analysis functions, to achieve an efficient, safe, secure advanced manufacturing and power systems. FPGA is also used for the next generation of automotive and medical IoT systems, and smart city applications, for example, the use of intelligent lighting and traffic management systems of high performance embedded vision and video analysis capabilities.
Monday, April 13, 2015
The new study was important progress in the two-dimensional semiconductor LED lights cost or drop
The market can buy LED lights, although power consumption is only 6% of incandescent lamps, life of up to 50,000 hours, but tens of times the price, the LED light can not easily walk into ordinary people's homes. Recently, this reporter learned from Nanjing University, the school has made a new type of two-dimensional semiconductor research on important progress, is expected to create a new material, which greatly reduces the cost of production LED lights, the research published online in chemistry and materials science and other top journals "Germany Applied Chemistry ", and by Nature, NanoWerk, new materials and other academic online media coverage of the highlights.
It is understood that the high brightness LED lights, low power consumption, no radiation, non-toxic ingredients, but also in areas not covered by the grid, relying on solar energy can be used. Tension in the earth's resources, serious environmental pollution today, for all of humanity has very important significance. 2014 Nobel Prize in Physics was awarded to the blue light-emitting diode (LED) inventor of the blue LED R & D biggest difficulty has been overcome.
Institute of Nano-optical materials have Hyperion school director, said, LED basic structure is an electroluminescent semiconductor material chip, the main material used in the production is made of gallium nitride. This is necessary to prepare high-temperature vacuum semiconductor material, expensive, is an important reason for the high price of LED lights, can not be promoted.
In recent years, drawing widespread graphene and other new materials exhibit excellent performance, very suitable, including LED, including information on energy used to manufacture the device. However, these new materials have fatal flaws - metallic or semi-metallic properties, and used in the production of semiconductor material must have properties, how to change the properties of these materials has become difficult to overcome the bottlenecks in the academic material.
Hyperion has said the new material designed for single school arsenic and antimony-ene-ene, only one atom thick, with semiconductor properties. This ultra-thin material stability, superior performance, broad application prospects. Huanan Institute of Materials Chung Yan teacher said, "The new material once used for applications, these devices not only wearable performance leaps and bounds, and will be more slim, the price will be more close to the people."
Thursday, April 9, 2015
TI-RTOS 2.12 The introduction of advanced power management capability and low power interconnect development
With Things (IoT) and gradually expand the scope of application in everyday products, simplifying software development has become increasingly important for interconnect applications. Texas Instruments (TI) (NASDAQ: TXN) today announced that its entire real-time operating system (RTOS) key upgrade. The upgrade simplifies embedded microcontroller-based (MCU) applications, such as Android and Windows for internal advanced operating system power management usability. Thus, by virtue of TI-RTOS 2.12, developers can easily take advantage of the built-in power management features TI devices to create IoT applications with longer battery life. In order to achieve universal access in the entire TI embedded processing portfolio, TI-RTOS 2.12 can be a free upgrade, designed to help application developers to focus on achieving differentiation, and preset and tested by connecting the stack and drive faster time to market, while avoiding the need to write low-level code. This new version is a major upgrade RTOS 2012 starting platform, incorporates TI experience in providing quality solutions for real-time applications OS at 20 years of accumulation. Log TI.com/RTOS now for free download new software.
TI-RTOS 2.12 for all supported devices, multi-tasking, power management, and peripheral driver API provides a standard set. This allows designers to run through the TI-RTOS application migration between different TI MCU, thereby reducing the next generation of product development time. In addition, the new scalable platform for TI Design Network also offers a free, patent restrictions and is not widely used software platform.
TI-RTOS 2.12 now with Energia integrated development environment. Energia Wiring and Arduino-based framework allows designers to the case without a lot of experience in rapid prototyping of embedded applications. TI-RTOS 2.12 will Energia common and easy-to-use API with new features such as multi-threading together. This is an easy way to deal with the design of multi-threaded applications on low-cost TI LaunchPad development kit, but can use common hardware abstraction layer.
TI-RTOS 2.12 features and benefits:
· Achieve longer battery life through the power management features TI-RTOS, which allows designers to use as little effort to achieve maximum energy saving applications.
· Wide range of wireless connectivity options, with the TI SimpleLink ™ Wi-Fi CC3100 / CC3200 solutions and SimpleLink CC26xx / CC13xx ultra-low power wireless MCU chip stack integration, support Wi-Fi®, Bluetooth® Smart and ZigBee, etc.
· OS components and drivers for open source (BSD) license, can easily be deployed on any application for free.
· Use a large number of existing software libraries before, to avoid developing software from scratch, in order to reduce development time.
· Improve documentation and a lot of examples that can help designers to quickly evaluate TI-RTOS performance, and proceed with the development.
Tuesday, April 7, 2015
Galaxy S6 Edge: Samsung released its own bending test
Samsung Electronics has provided an estimate for the first quarter of fiscal 2015 and contradicted a report on bent S6 smartphones. It is based on a continued decline in operating profit of 30 percent over the previous year - from 8.49 trillion won (7.17 billion euros) to 5.9 trillion won (5.0 billion euros). Consolidated sales decreased from 53.7 trillion won, up 12 percent to 47 trillion won. The final figures will report in late April.
Compared to the fourth quarter of 2014 with an operating profit of only 5.29 trillion won (4.47 billion euros) but an increase is visible, even though it is not possible Samsung to catch its decline from last year. For fiscal year 2014 had reported nearly a third less operating profit - due to the divisions Mobile and IT, with around 40 percent less profit for the year.
The only profitable division of Samsung was the semiconductor business, the profit is increased to 1.89 trillion won to 8.78 trillion won and its sales over the previous year increased by 6 percent to 39.73 trillion won last year. Its main customers were smartphone rival Apple, German Telekom, Ingram Micro, Sprint and Verizon, the relation of Samsung processors and components.
The success of Apple's iPhone models 6 and 6 Plus, the Samsung semiconductor manufacturing has, of course, also contributed significantly to the decline in Samsung's mobile division. Just last month it has with Galaxy S6 and S6 Edge introduced new devices.
These top models are viewing just like Apple's iPhone exposed 6 Plus at the start reproaches, they are easy to bend. The mobile insurer SquareTrade recently showed in a video that the Edge unlike other smartphones is bent at a force of 110 lbf (489 Newton) and his display breaks.
Samsung has now taken a position about this: A force of 110 lbf kick in practice hardly. In the back pocket of pressure lies much closer to 66 lbf (294 Newtons). In addition, internal tests had revealed that the Galaxy S6 and S6 Edge is not verbögen even at 79 lbf (351 Newtons). "This is so much pressure as you need to break five pencils at the same time."
In addition SquareTrade've only tested the stability of the front, criticized Samsung. Unlike many competitors, the new Samsung flagship models were equally stable backs. Its internal testing confirms that Samsung also with a video.
Compared to the fourth quarter of 2014 with an operating profit of only 5.29 trillion won (4.47 billion euros) but an increase is visible, even though it is not possible Samsung to catch its decline from last year. For fiscal year 2014 had reported nearly a third less operating profit - due to the divisions Mobile and IT, with around 40 percent less profit for the year.
The only profitable division of Samsung was the semiconductor business, the profit is increased to 1.89 trillion won to 8.78 trillion won and its sales over the previous year increased by 6 percent to 39.73 trillion won last year. Its main customers were smartphone rival Apple, German Telekom, Ingram Micro, Sprint and Verizon, the relation of Samsung processors and components.
The success of Apple's iPhone models 6 and 6 Plus, the Samsung semiconductor manufacturing has, of course, also contributed significantly to the decline in Samsung's mobile division. Just last month it has with Galaxy S6 and S6 Edge introduced new devices.
These top models are viewing just like Apple's iPhone exposed 6 Plus at the start reproaches, they are easy to bend. The mobile insurer SquareTrade recently showed in a video that the Edge unlike other smartphones is bent at a force of 110 lbf (489 Newton) and his display breaks.
Samsung has now taken a position about this: A force of 110 lbf kick in practice hardly. In the back pocket of pressure lies much closer to 66 lbf (294 Newtons). In addition, internal tests had revealed that the Galaxy S6 and S6 Edge is not verbögen even at 79 lbf (351 Newtons). "This is so much pressure as you need to break five pencils at the same time."
In addition SquareTrade've only tested the stability of the front, criticized Samsung. Unlike many competitors, the new Samsung flagship models were equally stable backs. Its internal testing confirms that Samsung also with a video.
Friday, April 3, 2015
Wireless sensor networks become a research hotspot
Wireless sensor networks are one of the hot current research in the field of information can be used to achieve specific environmental signal acquisition, processing and sending. Wireless sensor network is a new information acquisition and processing technology, has been widely applied in real life.
Sensor nodes can continuously collect data, event detection, event flags, position monitoring and control node. These features and wireless connectivity makes the prospect of sensor nodes for wireless sensor networks is very broad, can be widely used in environmental monitoring and forecasting, health care, smart home, building condition monitoring, complex machinery monitoring, urban transportation, space exploration, large workshop and warehouse management, as well as airports, large industrial park safety monitoring. With the in-depth research and extensive application of wireless sensor networks, wireless sensor networks gradually penetrated into all areas of human life and the attention of the industry.
Guarantee safe and smooth in the Intelligent Transportation System
Intelligent Transportation Systems (ITS) is a new transport system developed on the basis of the traditional transportation system, it information, communication, control and computer technology and other modern communications technology integration for the transport sector, and "people - vehicle - road - Environment "together organically. A wireless sensor network technology to increase the existing transportation facilities, will be able to alleviate the problems of modern safe, smooth, energy and environmental issues such as transportation from the fundamental, but also can improve traffic efficiency. Therefore, the wireless sensor network technology used in intelligent transportation system has become a hot topic in recent years. Intelligent Transportation Systems include several aspects of traffic information collection, traffic information transmission, such as traffic control and induction. Wireless sensor networks can provide an effective means for information collection and transmission of intelligent transportation systems, to monitor road and traffic intersection in each direction, speed and other information. It mainly consists of information gathering input subsystem policy control, output execution, data transfer between the various subsystems and communications. Information collected by the sensor acquisition subsystem vehicles and road information, and then by the policy control subsystem based on goal-setting, and the use of calculation methods to calculate the best solution, while the output control signals to the execution subsystem, to guide and control the vehicle passage, so as to achieve a preset target. Wireless sensor networks in Intelligent Transportation can also be used for traffic information dissemination, technical field of electronic toll, speed measurement, parking management, integrated information service platform, intelligent transportation and rail transportation, traffic guidance systems and integrated information platform.
In the health care system has much to offer
In recent years, wireless sensor networks have many applications in the health care system and health care, for example, to monitor the body's various physiological data, track and monitor the patient's physician and hospital operations, as well as the hospital's medication management. If the patient who install special purpose sensor nodes, such as heart rate and blood pressure monitoring equipment, the doctor can always be monitoring the patient's understanding of the disease, when the abnormal situation can quickly rescue. A University of Rochester study suggests that these computers can even be used for medical research. Scientists use a wireless sensor creates a "smart medical home" that a five room apartment, where the use of human research project to test the concept and prototype products. "Smart medical home" Use dust to measure important characteristics of the occupants (blood pressure, pulse and respiration), sleeping posture and activity status 24 hours a day. The data collected will be used to carry out future medical research. By embedding network sensors in shoes, furniture and household appliances and other equipment that can help the elderly, seriously ill patients and families living with disabilities. Efficient use of sensor networks can deliver the necessary information in order to facilitate the acceptance of care, but also reduce the burden on caregivers and improve quality of care. Prolonged use of sensor networks to collect physiological data, you can speed up the process of the development of new drugs, and the installation caused much inconvenience in the body of the object being monitored miniature sensors will not give normal life. In addition, medication management and other aspects, it also has a new and unique applications.
Facilitate more intelligent information appliances
The increasing popularity of wireless sensor networks, and promote the information appliance, the rapid development of network technology, the main devices in the home network from a single machine to a variety of appliances expanded home-based intelligent network control nodes for wireless sensor networks within the family, the external network The connection between the internal network and connecting information appliances and equipment provides a foundation platform.
Sensor nodes embedded in home appliances, connected together via a wireless network and the Internet, will provide people with a more comfortable, convenient and more humane smart home environment. The use of remote monitoring system enables remote control of home appliances, home security can always monitor the situation through the image sensing device. The use of intelligent sensor networks can be established kindergarten, early education monitoring environments for children, as well as tracking the trajectory of children's activities.
Wireless sensor networks using the existing Internet, mobile communication network and the telephone network indoor environmental parameters, operating status and other information appliances to inform tenants that residents can keep abreast of the situation inside the home, and appliances for remote monitoring, home interior and outside information transfer. Wireless sensor networks enable tenants not only anywhere you can access through a browser to monitor home water, electricity meters, gas meters, electric water heaters, air conditioners, rice cookers and security systems, gas leak alarm system, outsider intrusion warning system, and command can be set through a browser, remote control for home appliances. Wireless sensor network consists of more than one function the same or different wireless sensor nodes, to a monitoring device to form a wireless sensor network to access the Internet through a gateway system that uses a hybrid star star structure based on wireless sensor network structure of the system model. Sensor node in the network is responsible for data acquisition and data transfer node data acquisition, data acquisition module indoor environment, such as temperature, humidity, etc., by the communication routing protocol directly or indirectly transfer the data to the remote gateway node.
Currently, the main researches wireless sensor network node low power hardware platform design and topology control, network protocols, positioning technology. To detect light intensity sensor, for example, implement a wireless sensor network, according to the intensity of light detected by the sensor to turn off or turn on lights. In wireless sensor networks, ordinary node that collects the light intensity data is sent to the network coordinator, the network coordinator will contain data frame is sent to the control variable nodes simultaneously with the lights, but also the light intensity through the serial data transfer to the computer. By installing the software on a computer background, you can see the changes in light intensity signal. By covering the light intensity sensor may change the intensity of the collected light data, when the light intensity is relatively low when the curve decreased, whereas curve rises. This combination of embedded sensor network technology, sensor technology, short-range wireless communications technology, has a wide range of applications. The system does not require changes to the structure of the site, without the original support any fixed network, capable of rapid deployment, easy to adjust, and has good maintainability and scalability.
Sensor nodes can continuously collect data, event detection, event flags, position monitoring and control node. These features and wireless connectivity makes the prospect of sensor nodes for wireless sensor networks is very broad, can be widely used in environmental monitoring and forecasting, health care, smart home, building condition monitoring, complex machinery monitoring, urban transportation, space exploration, large workshop and warehouse management, as well as airports, large industrial park safety monitoring. With the in-depth research and extensive application of wireless sensor networks, wireless sensor networks gradually penetrated into all areas of human life and the attention of the industry.
Guarantee safe and smooth in the Intelligent Transportation System
Intelligent Transportation Systems (ITS) is a new transport system developed on the basis of the traditional transportation system, it information, communication, control and computer technology and other modern communications technology integration for the transport sector, and "people - vehicle - road - Environment "together organically. A wireless sensor network technology to increase the existing transportation facilities, will be able to alleviate the problems of modern safe, smooth, energy and environmental issues such as transportation from the fundamental, but also can improve traffic efficiency. Therefore, the wireless sensor network technology used in intelligent transportation system has become a hot topic in recent years. Intelligent Transportation Systems include several aspects of traffic information collection, traffic information transmission, such as traffic control and induction. Wireless sensor networks can provide an effective means for information collection and transmission of intelligent transportation systems, to monitor road and traffic intersection in each direction, speed and other information. It mainly consists of information gathering input subsystem policy control, output execution, data transfer between the various subsystems and communications. Information collected by the sensor acquisition subsystem vehicles and road information, and then by the policy control subsystem based on goal-setting, and the use of calculation methods to calculate the best solution, while the output control signals to the execution subsystem, to guide and control the vehicle passage, so as to achieve a preset target. Wireless sensor networks in Intelligent Transportation can also be used for traffic information dissemination, technical field of electronic toll, speed measurement, parking management, integrated information service platform, intelligent transportation and rail transportation, traffic guidance systems and integrated information platform.
In the health care system has much to offer
In recent years, wireless sensor networks have many applications in the health care system and health care, for example, to monitor the body's various physiological data, track and monitor the patient's physician and hospital operations, as well as the hospital's medication management. If the patient who install special purpose sensor nodes, such as heart rate and blood pressure monitoring equipment, the doctor can always be monitoring the patient's understanding of the disease, when the abnormal situation can quickly rescue. A University of Rochester study suggests that these computers can even be used for medical research. Scientists use a wireless sensor creates a "smart medical home" that a five room apartment, where the use of human research project to test the concept and prototype products. "Smart medical home" Use dust to measure important characteristics of the occupants (blood pressure, pulse and respiration), sleeping posture and activity status 24 hours a day. The data collected will be used to carry out future medical research. By embedding network sensors in shoes, furniture and household appliances and other equipment that can help the elderly, seriously ill patients and families living with disabilities. Efficient use of sensor networks can deliver the necessary information in order to facilitate the acceptance of care, but also reduce the burden on caregivers and improve quality of care. Prolonged use of sensor networks to collect physiological data, you can speed up the process of the development of new drugs, and the installation caused much inconvenience in the body of the object being monitored miniature sensors will not give normal life. In addition, medication management and other aspects, it also has a new and unique applications.
Facilitate more intelligent information appliances
The increasing popularity of wireless sensor networks, and promote the information appliance, the rapid development of network technology, the main devices in the home network from a single machine to a variety of appliances expanded home-based intelligent network control nodes for wireless sensor networks within the family, the external network The connection between the internal network and connecting information appliances and equipment provides a foundation platform.
Sensor nodes embedded in home appliances, connected together via a wireless network and the Internet, will provide people with a more comfortable, convenient and more humane smart home environment. The use of remote monitoring system enables remote control of home appliances, home security can always monitor the situation through the image sensing device. The use of intelligent sensor networks can be established kindergarten, early education monitoring environments for children, as well as tracking the trajectory of children's activities.
Wireless sensor networks using the existing Internet, mobile communication network and the telephone network indoor environmental parameters, operating status and other information appliances to inform tenants that residents can keep abreast of the situation inside the home, and appliances for remote monitoring, home interior and outside information transfer. Wireless sensor networks enable tenants not only anywhere you can access through a browser to monitor home water, electricity meters, gas meters, electric water heaters, air conditioners, rice cookers and security systems, gas leak alarm system, outsider intrusion warning system, and command can be set through a browser, remote control for home appliances. Wireless sensor network consists of more than one function the same or different wireless sensor nodes, to a monitoring device to form a wireless sensor network to access the Internet through a gateway system that uses a hybrid star star structure based on wireless sensor network structure of the system model. Sensor node in the network is responsible for data acquisition and data transfer node data acquisition, data acquisition module indoor environment, such as temperature, humidity, etc., by the communication routing protocol directly or indirectly transfer the data to the remote gateway node.
Currently, the main researches wireless sensor network node low power hardware platform design and topology control, network protocols, positioning technology. To detect light intensity sensor, for example, implement a wireless sensor network, according to the intensity of light detected by the sensor to turn off or turn on lights. In wireless sensor networks, ordinary node that collects the light intensity data is sent to the network coordinator, the network coordinator will contain data frame is sent to the control variable nodes simultaneously with the lights, but also the light intensity through the serial data transfer to the computer. By installing the software on a computer background, you can see the changes in light intensity signal. By covering the light intensity sensor may change the intensity of the collected light data, when the light intensity is relatively low when the curve decreased, whereas curve rises. This combination of embedded sensor network technology, sensor technology, short-range wireless communications technology, has a wide range of applications. The system does not require changes to the structure of the site, without the original support any fixed network, capable of rapid deployment, easy to adjust, and has good maintainability and scalability.
Wednesday, April 1, 2015
Measure conductors and semiconductors in the lower resistance range
The gauge is Loresta GX by Mitsubishi Chemical Analytech (Sales: N & H Technology) allows the sheet resistivity, the volume resistivity and conductivity measured in real time. The measuring device is designed for the low range of 10-4 to 107Ω and is suitable to measure conductors and semiconductors in the lower resistance range.
The so-called Silicon mode, it is the first time to measure silicon wafer. A TFT color display with 7.5 '' touch screen function and facilitates the reading of the data and the menu navigation. In addition, the data on the USB interface can be transferred to a PC. Due to the automatic modes and auto-hold timer mode, a one-touch operation is possible. The applied voltage may be selectively chosen, so that measurements of materials with a low conductivity are possible.
Available are various types of measuring heads which can be used depending on the nature of the measurement object.
The so-called Silicon mode, it is the first time to measure silicon wafer. A TFT color display with 7.5 '' touch screen function and facilitates the reading of the data and the menu navigation. In addition, the data on the USB interface can be transferred to a PC. Due to the automatic modes and auto-hold timer mode, a one-touch operation is possible. The applied voltage may be selectively chosen, so that measurements of materials with a low conductivity are possible.
Available are various types of measuring heads which can be used depending on the nature of the measurement object.
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