Ultra-portable, wireless smartphone spectrometer for rapid, non-destructive testing of fruit ripeness
| Autor: | Akshat Wahi, Ramesh Raskar, Ishan Kothari, Anshuman J. Das |
|---|---|
| Přispěvatelé: | Massachusetts Institute of Technology. Media Laboratory, Program in Media Arts and Sciences (Massachusetts Institute of Technology), Das, Anshuman Jyothi, Raskar, Ramesh |
| Rok vydání: | 2016 |
| Předmět: |
Chlorophyll
Computer science Interface (computing) Plant Development 02 engineering and technology Ripeness 01 natural sciences Sensitivity and Specificity Article chemistry.chemical_compound Nondestructive testing Wireless Humans Multidisciplinary Spectrometer business.industry 010401 analytical chemistry Optical Imaging Reproducibility of Results 021001 nanoscience & nanotechnology Fluorescence 0104 chemical sciences Spectrometry Fluorescence chemistry Embedded system Computers Handheld Fruit Malus 0210 nano-technology business Computer hardware Food Analysis |
| Zdroj: | Scientific Reports Nature |
| ISSN: | 2045-2322 |
| Popis: | We demonstrate a smartphone based spectrometer design that is standalone and supported on a wireless platform. The device is inherently low-cost and the power consumption is minimal making it portable to carry out a range of studies in the field. All essential components of the device like the light source, spectrometer, filters, microcontroller and wireless circuits have been assembled in a housing of dimensions 88 mm × 37 mm × 22 mm and the entire device weighs 48 g. The resolution of the spectrometer is 15 nm, delivering accurate and repeatable measurements. The device has a dedicated app interface on the smartphone to communicate, receive, plot and analyze spectral data. The performance of the smartphone spectrometer is comparable to existing bench-top spectrometers in terms of stability and wavelength resolution. Validations of the device were carried out by demonstrating non-destructive ripeness testing in fruit samples. Ultra-Violet (UV) fluorescence from Chlorophyll present in the skin was measured across various apple varieties during the ripening process and correlated with destructive firmness tests. A satisfactory agreement was observed between ripeness and fluorescence signals. This demonstration is a step towards possible consumer, bio-sensing and diagnostic applications that can be carried out in a rapid manner. Massachusetts Institute of Technology. Tata Center for Technology and Design Tata Trusts |
| Databáze: | OpenAIRE |
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