High-Accuracy Location Estimation Method Using Public Wireless Networks Based on Radio Intensity Prediction for Logistics Tracking Terminal

2011 ◽  
Author(s):  
N. Yokoi ◽  
H. Hosaka ◽  
K. Sakata
Keyword(s):  
Power Consumption ◽  
Estimation Method ◽  
High Accuracy ◽  
Location Estimation ◽  
Low Power Consumption ◽  
Positioning Accuracy ◽  
Distribution Management ◽  
Intensity Prediction ◽  
Positioning Technique ◽  
Radio Intensity

For higher positioning accuracy of the low-power-consumption tracking terminal specific to the physical distribution management, a positioning technique using the Personal Handy-phone System (PHS) was developed.

Research on Embedded Roundness Measuring System

2012 ◽  
Vol 184-185 ◽  
pp. 1613-1617
Author(s):  
Jin Fang Zhu
Keyword(s):  
Data Collection ◽  
Power Consumption ◽  
Low Power ◽  
High Accuracy ◽  
Measuring System ◽  
Low Power Consumption ◽  
Measurement Principle ◽  
Graphic Construction ◽  
Collection Date ◽  
Roundness Measurement

This article studies the embedded SPC and its application in roundness measuring system by analyzing the current roundness measurement principle and technology. With analyzing the process of data collection, date treatment and various kinds of tool graphic construction, we study the feasibility of integrating SPC into roundness measurement and finally apply the embedded SPC as pure software into roundness measuring system. We design the roundness measuring system based on embedded SPC and develop the roundness measuring system of low power consumption, high accuracy and easy application, which is suitable for industry field usage.

scholarly journals Variation of Static-PPP Positioning Accuracy Using GPS-Single Frequency Observations (Aswan, Egypt)

2017 ◽  
Vol 52 (2) ◽  
pp. 19-26 ◽  
Author(s):  
Ashraf Farah
Keyword(s):  
Precision Agriculture ◽  
Precise Point Positioning ◽  
Low Cost ◽  
High Accuracy ◽  
Single Frequency ◽  
Dual Frequency ◽  
Differential Gps ◽  
Positioning Accuracy ◽  
Comparable Accuracy ◽  
Positioning Technique

Abstract Precise Point Positioning (PPP) is a technique used for position computation with a high accuracy using only one GNSS receiver. It depends on highly accurate satellite position and clock data rather than broadcast ephemeries. PPP precision varies based on positioning technique (static or kinematic), observations type (single or dual frequency) and the duration of collected observations. PPP-(dual frequency receivers) offers comparable accuracy to differential GPS. PPP-single frequency receivers has many applications such as infrastructure, hydrography and precision agriculture. PPP using low cost GPS single-frequency receivers is an area of great interest for millions of users in developing countries such as Egypt. This research presents a study for the variability of single frequency static GPS-PPP precision based on different observation durations.

scholarly journals An Emergency Seamless Positioning Technique Based on ad hoc UWB Networking Using Robust EKF

Sensors ◽  
2019 ◽  
Vol 19 (14) ◽  
pp. 3135 ◽  
Author(s):  
Han ◽  
Wang ◽  
Liu ◽  
Zhang ◽  
Yang ◽  
...  
Keyword(s):  
Ad Hoc ◽  
High Accuracy ◽  
Ultra Wideband ◽  
Global Test ◽  
Positioning Accuracy ◽  
Network Nodes ◽  
Outdoor Environments ◽  
Positioning Technique ◽  
Seamless Positioning ◽  
Indoor And Outdoor

In this paper, a new emergency positioning technique is proposed based on ad hoc GNSS/UWB (Global Navigation Satellite System/Ultra-Wideband) network. The main innovations of the program are reflected in two aspects. First of all, a unified coordinate frame for indoor and outdoor environments is constructed dynamically with GNSS/UWB integration. In the outdoor environments, the high accuracy positioning can be achieved with GNSS/UWB equipment. The high-accuracy indoor coordinate is obtained by measuring the range observations between adjacent network nodes and outdoor GNSS/UWB nodes, and the range information of the UWB network is transmitted to the cloud server center. A network adjustment algorithm is proposed to improve the positioning accuracy of the UWB network. Secondly, a UWB indoor location algorithm based on robust EKF (Extended Kalman Filter) is proposed. By analyzing the transfer characteristics of gross error in EKF model, a new robust EKF model is established. The model is constructed based on the statistical characteristics of redundant observation components and prediction residual. The robust equivalent gain matrix is constructed, and the robust positioning solution of UWB is obtained with iteration. The global test is carried out first to further improve the real-time operation efficiency. Finally, a field indoor and outdoor seamless positioning experiment was carried out to verify the effectiveness of the proposed algorithm. The results show that the positioning accuracy of UWB emergency network nodes (anchors) can reach 0.35 m. Based on the network, the positioning accuracy of the tag can reach 0.38 m by applying the improved robust EKF positioning algorithm, which is improved by 20.83% and 73.43% compared with standard EKF and least square method, respectively.

A NOVEL SWITCHED-CURRENT SUCCESSIVE APPROXIMATION ADC

2011 ◽  
Vol 20 (01) ◽  
pp. 15-27 ◽  
Author(s):  
XIAN TANG ◽  
KONG PANG PUN
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Successive Approximation ◽  
High Speed ◽  
High Accuracy ◽  
Low Power Consumption ◽  
Cmos Process ◽  
Power Efficient ◽  
Successive Approximation Adc ◽  
Switched Current

A novel switched-current successive approximation ADC is presented in this paper with high speed and low power consumption. The proposed ADC contains a new high-accuracy and power-efficient switched-current S/H circuit and a speed-improved current comparator. Designed and simulated in a 0.18-μm CMOS process, this 8-bit ADC achieves 46.23 dB SNDR at 1.23 MS/s consuming 73.19 μW under 1.2 V voltage supply, resulting in an ENOB of 7.38-bit and an FOM of 0.357 pJ/Conv.-step.

Using Dual-Channel D/A Converters Design Successive Approximation A/D Converter

2015 ◽  
Vol 719-720 ◽  
pp. 611-614
Author(s):  
Jia Rong Wang ◽  
Xiao Dong Xia ◽  
Zong Da Zhang ◽  
Han Yang
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Successive Approximation ◽  
Low Cost ◽  
Electronic Devices ◽  
High Accuracy ◽  
Low Power Consumption ◽  
Digital Converter ◽  
Analog To Digital ◽  
Dual Channel

The successive approximation analog-to-digital converter (ADC) has been widely used in electronic devices due to the corresponding characteristics which are low cost, low power consumption, high accuracy and so on. This paper expounds a design of successive approximation A / D converter to show how to use TCL5615 which is a dual-channel serial 10-bit D/A converter (DAC) to make the conversion accuracy to reach 14-bit.

Design and Implementation of Online Photosensitive Turbid Meter

2013 ◽  
Vol 341-342 ◽  
pp. 1076-1079
Author(s):  
Jin Yu Wang ◽  
Xi Tai Ye ◽  
Guang Cheng Liu
Keyword(s):  
Light Scattering ◽  
Power Consumption ◽  
Low Power ◽  
Water Samples ◽  
High Stability ◽  
Suspended Solids ◽  
High Accuracy ◽  
Low Power Consumption ◽  
User Requirements ◽  
Design And Implementation

This paper explain a new online Turbidimeter to measure sewage suspended solids based on light scattering principle. This Photosensitive Turbidimeter has the advantages of high accuracy, high stability, low power consumption and so on. It can meets the current national health standards and grassroots laboratorys detecting the turbidity of water samples and satisfies user requirements.

scholarly journals Improving Localization in Wireless Sensor Network Using Fixed and Mobile Guide Nodes

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
R. Ahmadi ◽  
G. Ekbatanifard ◽  
A. Jahangiry ◽  
M. Kordlar
Keyword(s):  
Wireless Sensor Network ◽  
Power Consumption ◽  
Sensor Network ◽  
Low Cost ◽  
High Accuracy ◽  
Wireless Sensor ◽  
Low Power Consumption ◽  
Complete Coverage ◽  
Network Localization

Wireless sensor network contains very large number of tiny sensors; some nodes with known position are recognized as guide nodes. Other nodes with unknown position are localized by guide nodes. This article uses the combination of fixed and mobile guide nodes in wireless network localization. So nearly 20% of nodes are fixed guide nodes and three nodes are intended as mobile guide nodes. To evaluate the proficiency, the proposed algorithm has been successfully studied and verified through simulation. Low cost, high accuracy, and low power consumption of nodes and complete coverage are the benefits of this approach and long term in localization is the disadvantage of this method.

The Application of I2C Bus Digital Sensor in Airflow Measurements

2011 ◽  
Vol 130-134 ◽  
pp. 108-111
Author(s):  
Yu Guang Guo ◽  
De Zhi Ren ◽  
Li Ping Xu
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Relative Error ◽  
Measurement System ◽  
Fast Response ◽  
High Accuracy ◽  
Low Power Consumption ◽  
Ultralow Power ◽  
Airflow Sensor

The application of a new microbridge mass airflow sensor is presented. Based on the introduction of the sensor’s I2C interface principle, TI’s ultralow power consumption MSP430F5438 micro controller is used as core processor to design a measurement system which has a good low power consumption character. The performances of the system are examined by the experiments. The result of the experiments can indicate that the relative error of the system is less than3.5%, and the sensor has the characteristics of high accuracy, low power consumption, fast response, strong anti-interference ability, etc.

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