Effect of alternating electric fields on the behaviour of small-scale laminar diffusion flames

A Multi-view Optical Technique to Obtain Mode Shapes of Structures

Investigation of the effect of DC electric field on a small ethanol diffusion flame

. A comparison among three methods for the calibration of tri-axial
accelerometers, in particular MEMS, is presented in this paper, paying
attention to the uncertainty assessment of each method. The first method is
performed according to the ISO 16063 standards. Two innovative methods are
analysed, both suitable for in-field application. The effects on the whole
uncertainty of the following aspects have been evaluated: the test bench
performances in realizing the reference motion, the vibration reference
sensor, the geometrical parameters and the data processing techniques. The
uncertainty contributions due to the offset and the transverse sensitivity
are also studied, by calibrating two different types of accelerometers, a
piezoelectric one and a capacitive one, to check their effect on the accuracy
of the methods under comparison. The reproducibility of methods is
demonstrated. Relative uncertainty of methods ranges from 3 to 5 %,
depending on the complexity of the model and of the requested operations. The
results appear promising for low-cost calibration of new tri-axial
accelerometers of MEMS type.

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Calibration of tri-axial MEMS accelerometers in the low-frequency range – Part 2: Uncertainty assessment

Safety is one of the key aspects of the successful transport of cargo. In the case of road transport, the dynamics of a vehicle during normal events such as braking, steering, and evasive maneuver are variable in different places in the vehicle. Several manufacturers provide different dataloggers with acceleration sensors, but the results are not comparable due to different sensor parameters, measurement ranges, sampling frequencies, data filtration, and evaluation of different periods of acceleration. The position of the sensor in the loading area is also important. The accelerations are not the same at all points in the vehicle. The article deals with the measurement of these dynamic events with MEMS sensors on selected points of a vehicle loaded with cargo and with changes in dynamics after certain events that could occur during regular road transport of cargo to analyze the possibilities for monitoring accelerations and the related forces acting on the cargo during transport. The article uses evaluation times of 80, 300, and 1000 ms for accelerations. With the measured values, it is possible to determine the places with a higher risk of cargo damage and not only to adjust the packaging and securing of the cargo, but also to modify the transport routes. Concerning the purposes of securing the cargo in relation to EN 12195-1 and the minimum values of forces for securing the cargo, we focused primarily on the places where the acceleration of 0.5 g was exceeded when analyzing the monitored route. There were 32 of these points in total, all of which were measured by a sensor located at the rear of the semi-trailer. In 31 cases, the limit of 0.5 g was exceeded for an 80-ms evaluation time, and in one case, the value of 0.51 g was reached in the transverse direction for a 300-ms evaluation time.

Application of MEMS Sensors for Evaluation of the Dynamics for Cargo Securing on Road Vehicles.

The paper describes the design and implementation of the CAN based digital dashboard unit used in the design study SCE of the electric car. The system consists of a CAN communication interface unit based on a PIC microcontroller and graphic programmable LCD displays. The work is not only described in terms of technical solution, but also in terms of design.

Design of Digital CAN Based Car Dashboard Unit

In this paper is described measurement of ride comfort with 3axial digital MEMS accelerometer, which is connected by CAN bus to measurement logger based on cRIO platform.

The use of MEMs accelerometers for measurement of driver seat comfort

The paper describes connection of car LED lights through the LIN bus to CAN bus with the possibility of controlling light intensity or light up speed.

Controll of car LED lights by CAN/LIN bus

This paper deals with the influence of the dc electric field on the stabilization of the flame created from a poor (lean) mixture of methane and oxygen. In our experiments, the electric field is created between two electrodes in a combustion chamber in which one of the electrodes is a part of a burner. The dc voltage from a high voltage source is applied to both electrodes. A mixture of methane and oxygen with the purity of 99.95% of both gases is used for the combustion process. The burner combustion power is set at 0.5 kW. The observations of the electric field effects on the stabilization of the flame are carried out by increasing the oxygen flow up to the flame extinction. The result of the measurement is the observed electric field influence on the stabilization of the flame that is created from a poor mixture of methane and oxygen. In the experiment, we observe the dependence between flame stabilization and supplied electrical energy.

Influence of Electric Field on Stabilization of Flame From Poor Methane–Oxygen Mixture

Paper describes measurements of chosen points and surfaces of car axle during simulated test of cornering. The results from measurement were compared to results from mathematical model from multibody analysis. The measurements were done by contactless optical 3D scanning method and photogrammetric system.

Jiri Kulhanek

Papers

Design of Digital CAN Based Car Dashboard Unit

The use of MEMs accelerometers for measurement of driver seat comfort

Controll of car LED lights by CAN/LIN bus

Influence of Electric Field on Stabilization of Flame From Poor Methane–Oxygen Mixture

Car axle testing on hydropulse