scholarly journals Temperature Compensation Method for Raster Projectors Used in 3D Structured Light Scanners

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5778
Author(s):  
Marcin Adamczyk
Keyword(s):  
Thermal Effects ◽  
Temperature Compensation ◽  
Measurement Method ◽  
Environmental Temperature ◽  
Structured Light ◽  
Three Dimensional ◽  
Compensation Method ◽  
Effect Of Temperature ◽  
Significant Deterioration ◽  
Effects Of Temperature

Raster projectors are commonly used in many various measurement applications where active lighting is required, such as in three-dimensional structured light scanners. The effect of temperature on the raster projector, in some conditions, can lead to significant deterioration of the measurements performed with such a scanner. In this paper, the outcomes of several experiments concerning the effects of temperature on raster projectors are presented. The described research is focused on the thermal deformations of projected images caused by common thermal effects observed in projectors: those caused by the warming-up process and changes in ambient environmental temperature. A software compensation method is also presented. It is suitable for implementation in any existing measurement method that uses raster projectors. The results of performed verification experiments show that the developed compensation method can decrease the thermal drift of the projected images by up to 14 times in the ambient temperature range 14–42 °C.

scholarly journals Temperature Compensation Method for Mechanical Base of 3D-Structured Light Scanners

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 362 ◽  
Author(s):  
Marcin Adamczyk ◽  
Paweł Liberadzki ◽  
Robert Sitnik
Keyword(s):  
Temperature Compensation ◽  
Structured Light ◽  
Three Dimensional ◽  
Compensation Method ◽  
Effect Of Temperature ◽  
3D Measurement ◽  
Significant Deterioration ◽  
Complex Issue ◽  
Additional Equipment ◽  
Thermal Chamber

The effect of temperature on three-dimensional (3D) structured light scanners is a very complex issue that, under some conditions, can lead to significant deterioration of performed measurements. In this paper, we present the results of several studies concerning the effect of temperature on the mechanical base of 3D-structured light scanners. We also propose a software compensation method suitable for implementation in any existing scanner. The most significant advantage of the described method is the fact that it does not require any specialized artifact or any additional equipment, nor access to the thermal chamber. It uses a simulation of mechanical base thermal deformations and a virtual 3D measurement environment that allows for conducting virtual measurements. The results from the verification experiments show that the developed method can extend the range of temperatures in which 3D-structured light scanners can perform valid measurements by more than six-fold.

scholarly journals Temperature Compensation Method for Digital Cameras in 2D and 3D Measurement Applications

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3685 ◽  
Author(s):  
Marcin Adamczyk ◽  
Paweł Liberadzki ◽  
Robert Sitnik
Keyword(s):  
Temperature Compensation ◽  
Three Dimensional ◽  
Compensation Method ◽  
Effect Of Temperature ◽  
Calibration Model ◽  
Digital Cameras ◽  
Compensation Model ◽  
Camera Design ◽  
Compensation Approach ◽  
2D And 3D

This paper presents the results of several studies concerning the effect of temperature on digital cameras. Experiments were performed using three different camera models. The presented results conclusively demonstrate that the typical camera design does not adequately take into account the effect of temperature variation on the device’s performance. In this regard, a modified camera design is proposed that exhibits a highly predictable behavior under varying ambient temperature and facilitates thermal compensation. A novel temperature compensation method is also proposed. This compensation model can be applied in almost every existing camera application, as it is compatible with every camera calibration model. A two-dimensional (2D) and three-dimensional (3D) application of the proposed compensation model is also described. The results of the application of the proposed compensation approach are presented herein.

Characterization of a MEMS Accelerometer Considering Environmental Temperature Fluctuations

2011 ◽  
Vol 697-698 ◽  
pp. 801-804 ◽  
Author(s):  
Guang Jun Liu ◽  
T. Jiang ◽  
Q.K. Jiang ◽  
A.L. Wang
Keyword(s):  
Resonant Frequency ◽  
Temperature Compensation ◽  
Environmental Temperature ◽  
Great Influence ◽  
Temperature Fluctuations ◽  
Actual Performance ◽  
Mems Accelerometer ◽  
Vibration Equation ◽  
Effects Of Temperature

This paper investigates the effects of environmental temperature fluctuations on the performance of a MEMS accelerometer. The model, vibration equation, and calculation of the output of detection capacitance for the accelerometer are presented. The fluctuations in temperature are considered when evaluating the actual performance of the device. The analysis results show that temperature fluctuations have a great influence on the output of the accelerometer although it has little influence on the resonant frequency of sensing mode and the sensitivity of detection capacitance. The performance deviations under the effects of temperature fluctuations are calculated accurately, which provides a reference for the design of temperature compensation method and robust design for the accelerometer.

Effect of temperature on calibration quality of structured-light three-dimensional scanners

2014 ◽  
Vol 53 (23) ◽  
pp. 5154 ◽  
Author(s):  
M. Adamczyk ◽  
M. Kamiński ◽  
R. Sitnik ◽  
A. Bogdan ◽  
M. Karaszewski
Keyword(s):  
Structured Light ◽  
Three Dimensional ◽  
Effect Of Temperature

scholarly journals A temperature compensation method of measuring frequency for cylindrical vibratory gyroscope in frequency split trimming

2018 ◽  
Vol 175 ◽  
pp. 03042
Author(s):  
Youwang Hu ◽  
Kai Zeng ◽  
Haofang Wang ◽  
Chang Liang ◽  
Yongping Zhou ◽  
...  
Keyword(s):  
Natural Frequency ◽  
Temperature Compensation ◽  
Environmental Temperature ◽  
Measuring Method ◽  
Frequency Measurement ◽  
Effect Of Temperature ◽  
Vibratory Gyroscope ◽  
Before And After ◽  
Measuring Frequency ◽  
Frequency Split

In the process of frequency split trimming, the fluctuation of environmental temperature causes a deviation in measuring the natural frequency, which is bigger than the request trimming accuracy. Therefore, a measuring method with temperature compensation is proposed to reduce this impact. Firstly, the relationship between natural frequency of resonator and environmental temperature are studied by experiments. Furthermore, the corresponding model of temperature compensation is proposed, which is written into the measuring unit to calculate the compensated frequency. The frequencies before and after temperature compensation are measured to prove the correctness of this method. At last, a real time measuring experiment is accomplished to verify the feasibility in frequency split trimming. Results show that the effect of temperature on the natural frequency reduced significantly with the temperature compensation measuring method. The proposed method is applicable for other types of vibratory gyroscope in precision frequency measurement.

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