This paper describes the physics of new camera-based imaging methods for silicon solar cell characterization. The development aims at quantifying the images with respect to physical properties like current, voltage, resistance, and power. This improves the informative value and the comparability of results — at least in the limits of the sometimes simplified models. Selected examples show that the methods provide valuable information for industrial production control and enable new insight into fundamental effects of solar cell and semiconductor physics.

April 16, 2013

Bewegungszustandsbestimmung ungestützter MEMS-Beschleunigungssensoren

Kristoph Keunecke, Gerd Scholl

Page range: 123-128

Abstract

The position accuracy in autonomous inertial navigation systems (INS) can be increased with zero-velocity updates (ZUPT) significantly, if the motion state is known. If the sensor signals are weak, however, especially during an uniform movement without acceleration or deceleration, the sensor signal is covered up by the sensor noise, and the determination of the motion state becomes a challenging task. Therefore, in this article various probability tests are comprehensively evaluated with simple but typical measurement setups.

April 16, 2013

Optische Erfassung dreidimensionaler Strukturen in einem globalen Referenzsystem

Robert Schmitt, Alexander Schönberg, Felix Bertelsmeier

Page range: 129-134

Abstract

Identification and compensation of deviations between the virtual planning and the real implementation pose challenges for the commissioning of production processes. The deviations can be visualized and thereby compensated by global reference systems. This paper describes the integration of local sensors and their data into global reference systems by means of a flexible optical light section sensor consisting of multiple cameras and a multi-line laser projector as an example.

April 16, 2013

Ein störgrößenunterdrückendes optisches Messsystem auf Basis von Faser-Bragg-Gitter-Sensoren

Max R. Rößner, Andre Heßke, Vitali Kin, Alexander W. Koch

Page range: 135-139

Abstract

Fiber Bragg gratings (FBGs) can be used as optical temperature and strain sensors inscribed into the core of an optical fiber [1]. In certain applications, FBGs offer benefits compared to conventional, electrical sensors [2]. These advantages, however, go along with the significant effort to convert the measurement result from the optical to the electrical domain. Furthermore, the influence of cross sensitivity (either temperature or strain) usually have to be cancelled out. This paper proposes a simplified setup that enables temperature- or strain-compensated measurements based on fiber Bragg grating sensors with reduced complexity. The principle was tested in simulation as well as in experiment.

April 16, 2013

Veranstaltungen von April bis Dezember 2013

Page range: 140-142

About this journal

Objective

The journal promotes dialogue between the developers of application-oriented sensors, measurement systems, and measurement methods and the manufacturers and measurement technologists who use them.

Topics

The manufacture and characteristics of new sensors for measurement technology in the industrial sector
New measurement methods
Hardware and software based processing and analysis of measurement signals to obtain measurement values
The outcomes of employing new measurement systems and methods

Volume 80 Issue 4 -

Issue of tm - Technisches Messen

XXVI. Messtechnisches Symposium 2012 des AHMT e. V. in Aachen (Teil 1)

In Memoriam Prof. Dr. Joachim Hesse 

Kamerabasierte quantitative Messverfahren für die Silizium-Photovoltaik — Was Licht über Solarzellen erzählt

Abstract

Bewegungszustandsbestimmung ungestützter MEMS-Beschleunigungssensoren

Abstract

Optische Erfassung dreidimensionaler Strukturen in einem globalen Referenzsystem

Abstract

Ein störgrößenunterdrückendes optisches Messsystem auf Basis von Faser-Bragg-Gitter-Sensoren

Abstract

Veranstaltungen von April bis Dezember 2013

In Memoriam Prof. Dr. Joachim Hesse