The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Aiming at the typical orthogonal configuration scheme (twelve sensors are orthogonal), the project implementation. With the redundant system and small guide system Navigation computer are linked together, complement a complete micro-miniature redundant strap-down inertial navigation system. Studied the system of fault detection, fault isolation and the system reconstruction technology, and use direct...
This paper contains the development and analysis of the human motion state and the algorithm of the fall prediction based on the double foot pressure and the micro inertial MEMS sensors. The fall prediction hardware system consists of three parts, the double foot nodes and the waist node and how it was designed, which could measure the foot pressure parameters and the inertial parameters in different...
Nowadays, location-based services (LBS) has become widely used in our daily life. The most famous system is global positioning system (GPS), which is limited to outdoor applications and provide poor locating accuracy. In this paper, we present a positioning systems based on inertial MEMS sensor which includes three-axis accelerometer, three-axis gyroscope and three-axis magnetometer. The system can...
This paper proposes a position and attitude observer based on INS and GPS. Design and test results of an adaptive dual-rate Extended Kalman Filter(EKF) estimator for fusing data from Global Positioning Systems (GPS) and an Inertial Navigation System (INS) in order to estimate the position, velocity, and attitude. The dual-rate EKF consists of a high-speed filter and a low-speed filter, the high-speed...
According to the principle of electronic compass, we analyze the error of the E-compass and propose a calibration scheme in view of magnetic deviation, which is based on the self-designed tri-axial magnetometer system. The hardware is made by tri-axial magnetometer and tri-axial accelerometer. Considering the magnetic interference of the external environment will affect the magnetic deviation, we...
This paper presents a simplified Zero Moment Point algorithm for fall detection using inertial MEMS sensors. Based on body posture and stability judgment optimization system, we realized real-time detection and analysis of the falls. The system can be used in moving people airbag system that can prevent a major part of the induced fracture of the elderly from falls. Hardware includes the nodes that...
Disease prediction and the pursuit of health has always been the relish topic, especially as the aggravating population aging phenomenon. However, the existing medical knowledge used in disease prediction system is given by experts, which is vulnerable to restrictions of real-time and convenience. On the other hand, people don't want to use the high cost, complex medical monitoring system which could...
With the rapid development of science and technology, the accelerated pace of life, people need to rely on language and hearing to exchange information, share information, learn and progress together. Currently there are about 70 million deaf and dumb people in the world, and in China there are about 20 million patients with different levels of hearing impairment. It is imminent to develop a set of...
This paper presents the improvement of Chinese sign language translation system based on studying in HMM algorithm, modeling and analysis. Based on the multi-node micro inertial measurement unit built by MEMS sensors, finger motion can be recoded and analyzed by computer. The computer preprocesses the data from the MEMS sensor nodes, including filtering noise removal and feature extraction. At last...
This paper presents a design of switch mode power supply that can be used in the handheld power amplifier MRF9742 for the TD-LTE signal. This power supply uses PWM mode buck-convertor structure and envelopes tracking technology, which can acquire the envelope of input signal to dynamically adjust the MRF9742 power amplifier's supply voltage. Therefore, the DC power can be as low as possible with no...
This paper presents the development and analysis of inertial MEMS sensor based system that can detect falls in real time. The system is a major part of mobile human airbag system which prevents the elderly from fall induced fractures. The fall detection system hardware was designed, which could monitor the motions of the feet and waist and detect the falls in real time. Micro Inertial Measurement...
This paper presents a physical design for ultra-low power MCU usage based on improved multibit SRPG process. The State Retention Power Gating (SRPG) is used to save static power when the chip turns to sleep mode and its area occupies 50% of the whole standard cells area. The existed multibit SRPG cells occupy too many high metal layers, which lower the utilization of the standard cell region. In this...
This paper presents an Always-on buffer cluster implementation based on 28nm chip fabrication process. With the 28 nanometer process, area resources become more deficient than the previous node era in IC physical design. We have encountered serious congestion problems. Traditional method of low power physical design flow cannot make full use of the limited resources of the chip area. Therefore we...
Based on parallel processing methodology, a new design of high-performance chip with data flow architecture for accelerating AHRS is presented in this paper. Based gradient descent algorithm, we divided the serial algorithm into four primary pipeline function blocks on chip: Communication Block, Quaternion Initialization Block, Register file Block and Quaternion Update Block. Every block was constructed...
Strapdown inertial navigation system (SINS) is extensively used in many fields especially in military and engineering fields. Traditional processors are unable to meet the accuracy, power consumption and real-time requirements. In this paper, according to the strapdown inertial navigation algorithm, we designed a strap-down inertial navigation calculation ASIC using verilog HDL (Hardware Description...
Based on the optimised high-voltage network design and the resistance matching technique, a wafer-level light emitting diode (WL-LED) with a light output power of 157 W has been successfully demonstrated for the first time. The external quantum efficiency of the fabricated WL-LED was measured to be 24% at a driving current of 4 A.
3D System in Package with Through Silicon Via has been a promising solution to enhance the integrated density[1]. However, as more and more devices are integrated in one package, the reliability and performance is affected by the work environment, such as temperature variation, vibration, drop and so on. Many researches has been done on the drop analysis of solder ball on the PCB substrate, but few...
In this paper, we developed a novel motion capture system with multi-sensing-node based on inertial MEMS sensors and ZigBee network, which is expected to be performed ubiquitously, not only strictly used in particular room as optical capture system does. First, the multi-node motion capture system was defined, which can track human motions and postures simultaneously and wirelessly. Second, multi...
For a typical urban intersection, moving vehicle shadow and vehicle-pedestrian mixed conditions exist in traffic scene commonly. These interfering factors lead to a very low correct rate of the traffic parameters extraction. This paper presents robust traffic parameters extraction (RTPE) approach for traffic surveillance system at an urban intersection, which contains three key algorithms. First,...
Traffic incident detection is one of the most important issues for intelligent transportation systems (ITS), especially in urban area which is full of signaled intersections. This paper presents the development of a novel traffic incident detection system based on image signal processing, feature extraction algorithms, and hidden Markov model (HMM) classifier. First, a traffic surveillance system...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.