Real-time digital processing of GPS measurements for transmission engineering

2003 ◽  
Vol 18 (1) ◽  
pp. 177-182 ◽  
Author(s):  
C. Mensah-Bonsu ◽  
G.T. Heydt
Keyword(s):  
Real Time ◽  
Digital Processing ◽  
Gps Measurements

scholarly journals Digital Data Processing Methods for Estimating Tractive Force of Tractors

2021 ◽  
Vol 31 (1) ◽  
pp. 127-142
Author(s):  
Vyacheslav F. Fedorenko ◽  
Vitaly E. Tarkivskiy ◽  
Nikolay P. Mishurov ◽  
Nikolay V. Trubitsyn
Keyword(s):  
Real Time ◽  
Strain Gauge ◽  
Impulse Noise ◽  
Median Filter ◽  
Digital Processing ◽  
Operating Conditions ◽  
Measuring Instruments ◽  
Important Indicator ◽  
Tractive Effort ◽  
Useful Signal

Introduction. When carrying out an energy assessment of agricultural machines and traction tests of tractors, the most important indicator is the value of the tractive effort. The existing methods for determining the tractive effort of tractors imply the use of specialized measuring instruments, such as strain gauges and devices for processing and displaying information. The accuracy of determining the tractive effort is significantly influenced by the physical and mechanical properties of soil. To process the useful signal during the measurement of tractive effort, the data stream of the strain gauge sensor must be subjected to additional digital filtering taking into account the operating conditions of the agricultural unit. Materials and Methods. The functions of changing the tractive effort obtained on the K-744R2 tractor in various gears have been analyzed. An algorithm for digital processing of the signal of a strain gauge force meter based on a median filter has been developed that makes it possible to increase the measurement accuracy. The advantage of the proposed method is the ability to cut off sharp short-term impulse noise and sharp fluctuations in the amplitude of the measured value. Results. A method for determining the amount of tractive effort using median signal processing has been proposed. A device for determining the tractive effort during testing of agricultural tractors and units has been developed. The choice of the main components of the device for determining the magnitude of the tractive effort has been substantiated. As a result of the research, a device for measuring and digital processing of the signal of a force meter based on a microcontroller and specialized software for processing initial data in real time was designed and manufactured. Discussion and Conclusion. The developed method makes it possible to exclude the negative effect of impulse noise arising in the process of measuring the tractive effort of the tractor. The proposed device for measuring the tractive effort of tractors is compatible at the level of the exchange protocol with existing devices, has a high speed of operation in real time, multi-channel operation.

A Real Time Topological Map Matching Methodology for GPS/GIS-Based Travel Behavior Studies

2015 ◽  
pp. 422-439
Author(s):  
Carola A. Blazquez ◽  
Pablo A. Miranda
Keyword(s):  
Real Time ◽  
Spatial Data ◽  
Travel Behavior ◽  
Map Matching ◽  
Gps Measurements ◽  
Case Scenario ◽  
Topological Map ◽  
Gis Environment ◽  
Control And Management ◽  
Parameter Values

The map matching problem arises when GPS measurements are incorrectly assigned to the roadway network in a GIS environment. This chapter presents a real-time topological decision rule-based methodology that detects and solves spatial mismatches as GPS measurements are collected. A real-time map matching methodology is required in several applications, such as fleet management, transit control and management, and travel behavior studies, in which decision-making must be performed simultaneously with the movement of vehicles, individuals, or objects. A computational implementation in a real case scenario in Chile indicates that the algorithm successfully resolves over 96% of the spatial mismatches encountered in real time. Various algorithmic parameter values were employed to test the performance of the algorithm for data collected every 5 and 10 seconds. Overall, the algorithm requires larger buffer sizes and speed ranges to obtain better results with lower spatial data qualities.

Fast real-time moment-ratio analysis of multibreath nitrogen washout in children

1985 ◽  
Vol 59 (4) ◽  
pp. 1137-1144 ◽  
Author(s):  
R. Kraemer ◽  
B. Meister
Keyword(s):  
Real Time ◽  
Time Moment ◽  
Digital Processing ◽  
Ratio Analysis ◽  
Delay Compensation ◽  
Ventilation Inhomogeneity ◽  
Moment Ratio ◽  
Residual Capacity ◽  
The Moment ◽  
Washout Curves

To apply real-time moment-ratio analysis to multibreath N2-washout curves (MBNW) from children, a new processor-controlled device was constructed. Flow and fractional N2 concentration (FN2) were each sampled by 200 Hz. An electromagnetic triple-valve system, with an instrumental dead space of 36 ml and a valve resistance of 0.3 cmH2O . l-1 . s, was connected in series with a pneumotachograph and an N2 analyzer (Ohio 720) placed next to the mouthpiece. A FORTRAN/MACRO program on a PDP 11/23 computer enabled measurement of inspiratory and expiratory flow and FN2 sampling by a 12-bit analog-to-digital converter. The fast real-time digital processing of the N2 and flow signals incorporated filtering, delay compensation, and corrections for the effects of changes in gas composition and temperature. MBNW dynamics of the lungs were studied in 17 healthy and 28 asthmatic children and in 16 patients with cystic fibrosis, evaluating the moment ratios of the washout curves as indices of the ventilation characteristics. Intrasubject variability of the moment ratios (m1/m0, m2/m0) and determination of functional residual capacity (FRC) varied between 6.3 and 14.7% (depending on which parameter is considered) and was comparatively lower than other indices previously investigated in adults. In addition, the sensitivity of the moment ratios for discriminating different stages of ventilation inhomogeneity was superior to other indices. m2/m0 is closely related to the simultaneously measured airway resistance, and the ratio between cumulative expired volume and FRC is correlated with the ratio between residual volume and total lung capacity.

Introduction of real-time digital processing techniques for the high-sensitivity GMI sensors

2019 ◽  
Vol 59 (2) ◽  
pp. 455-463
Author(s):  
Papa Silly Traore ◽  
Aktham Asfour ◽  
Jean Paul Yonnet ◽  
Cedric Boudinet
Keyword(s):  
Real Time ◽  
High Sensitivity ◽  
Digital Processing ◽  
Processing Techniques

A Real Time Topological Map Matching Methodology for GPS/GIS-Based Travel Behavior Studies

2014 ◽  
pp. 152-170 ◽  
Author(s):  
Carola A. Blazquez ◽  
Pablo A. Miranda
Keyword(s):  
Real Time ◽  
Spatial Data ◽  
Travel Behavior ◽  
Map Matching ◽  
Gps Measurements ◽  
Case Scenario ◽  
Topological Map ◽  
Gis Environment ◽  
Control And Management ◽  
Parameter Values

The map matching problem arises when GPS measurements are incorrectly assigned to the roadway network in a GIS environment. This chapter presents a real-time topological decision rule-based methodology that detects and solves spatial mismatches as GPS measurements are collected. A real-time map matching methodology is required in several applications, such as fleet management, transit control and management, and travel behavior studies, in which decision-making must be performed simultaneously with the movement of vehicles, individuals, or objects. A computational implementation in a real case scenario in Chile indicates that the algorithm successfully resolves over 96% of the spatial mismatches encountered in real time. Various algorithmic parameter values were employed to test the performance of the algorithm for data collected every 5 and 10 seconds. Overall, the algorithm requires larger buffer sizes and speed ranges to obtain better results with lower spatial data qualities.

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