An effective data acquisition system using image processing

Chung-How Poh; Chung-Kiak Poh

doi:10.1117/12.649103

6 December 2005 An effective data acquisition system using image processing

Chung-How Poh, Chung-Kiak Poh

Proceedings Volume 6051, Optomechatronic Machine Vision; 60511A (2005) https://doi.org/10.1117/12.649103
Event: Optomechatronic Technologies 2005, 2005, Sapporo, Japan

Abstract

The authors investigate a data acquisition system utilising the widely available digital multi-meter and the webcam. The system is suited for applications that require sampling rates of less than about 1 Hz, such as for ambient temperature recording or the monitoring of the charging state of rechargeable batteries. The data displayed on the external digital readout is acquired into the computer through the process of template matching. MATLAB is used as the programming language for processing the captured 2-D images in this demonstration. A RC charging experiment with a time characteristic of approximately 33 s is setup to verify the accuracy of the image-to-data conversion. It is found that the acquired data matches the steady-state voltage value displayed by the digital meter after an error detection technique has been devised and implemented into the data acquisition script file. It is possible to acquire a number of different readings simultaneously from various sources with this imaging method by placing a number of digital readouts within the camera's field-of-view.

Citation Download Citation

Chung-How Poh and Chung-Kiak Poh "An effective data acquisition system using image processing", Proc. SPIE 6051, Optomechatronic Machine Vision, 60511A (6 December 2005); https://doi.org/10.1117/12.649103

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