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- Hamid Muhammed, Hamed
(författare)
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Affordable simultaneous hyperspectral imaging
- 2013
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Ingår i: Sensor Review. - : Emerald Group Publishing Limited. - 0260-2288 .- 1758-6828. ; 33:3, s. 257-266
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Tidskriftsartikel (refereegranskat)abstract
- Purpose - The aim of the research project which resulted in this work is to achieve a cost-effective approach for instantaneous hyperspectral imaging. Design/methodology/approach - This paper presents a simulation study and an experimental evaluation of a novel imaging spectroscopy technique, where multi-channel image data are acquired instantaneously and transformed into spectra by using a statistical modelling approach. A digital colour camera equipped with an additional colour filter array was used to acquire an instantaneous single image that was demosaicked to generate a multi-channel image. A statistical transformation approach was employed to convert this image into a hyperspectral one. Findings - The feasibility of this method was investigated through extensive simulation and experimental tasks where promising results were obtained. Practical implications The small size of the initially acquired single instantaneous image makes this approach useful for applications where video-rate hyperspectral imaging is required. Originality/value - For the first time, a simplified prototype of this novel imaging spectroscopy technique was built and evaluated experimentally. And the results were compared with those of a more ideal simulation study. Recommendations for how to improve the prototype were also suggested as a result of the comparison between the simulation and the prototype evaluation results.
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| 2. |
- Matindoust, S., et al.
(författare)
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Food quality and safety monitoring using gas sensor array in intelligent packaging
- 2016
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Ingår i: Sensor Review. - : Emerald Group Publishing Limited. - 0260-2288 .- 1758-6828. ; 36:2, s. 169-183
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Tidskriftsartikel (refereegranskat)abstract
- Purpose - This paper aims to study different possibilities for implementing easy-to-use and cost-effective micro-systems to detect and trace expelled gases from rotten food. The paper covers various radio-frequency identification (RFID) technologies and gas sensors as the two promoting feasibilities for the tracing of packaged food. Monitoring and maintaining quality and safety of food in transport and storage from producer to consumer are the most important concerns in food industry. Many toxin gases, even in parts per billion ranges, are produced from corrupted and rotten food and can endanger the consumers' health. To overcome the issues, intelligent traceability of food products, specifically the packaged ones, in terms of temperature, humidity, atmospheric conditions, etc., has been paid attention to by many researchers. Design/methodology/approach - Food poisoning is a serious problem that affects thousands of people every year. Poisoning food must be recognized early to prevent a serious health problem. Contaminated food is usually detectable by odor. A small gas sensors and low-cost tailored to the type of food packaging and a communication device for transmitting alarm output to the consumer are key factors in achieving intelligent packaging. Findings - Conducting polymer composite, intrinsically conducting polymer and metal oxide conductivity gas sensors, metal- oxide-semiconductor field-effect transistor (MOSFET) gas sensors offer excellent discrimination and lead the way for a new generation of "smart sensors" which will mould the future commercial markets for gas sensors. Originality/value - Small size, low power consumption, short response time, wide operating temperature, high efficiency and small area are most important features of introduced system for using in package food.
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| 3. |
- Smulko, Janusz Marek, et al.
(författare)
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New approaches for improving selectivity and sensitivity of resistive gas sensors : a review
- 2015
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Ingår i: Sensor Review. - 0260-2288 .- 1758-6828. ; 35:4, s. 340-347
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Forskningsöversikt (refereegranskat)abstract
- Purpose - This paper aims to present the methods of improving selectivity and sensitivity of resistance gas sensors. Design/methodology/approach - This paper compares various methods of improving gas sensing by temperature modulation, UV irradiation or fluctuation-enhanced sensing. The authors analyze low-frequency resistance fluctuations in commercial Taguchi gas sensors and the recently developed tungsten trioxide (WO3) gas-sensing layers, exhibiting a photo-catalytic effect. Findings - The efficiency of using low-frequency fluctuations to improve gas detection selectivity and sensitivity was confirmed by numerous experimental studies in commercial and prototype gas sensors. Research limitations/implications - A more advanced measurement setup is required to record noise data but it will reduce the number of gas sensors necessary for identifying the investigated gas mixtures. Practical implications - Fluctuation-enhanced sensing can reduce the energy consumption of gas detection systems and assures better detection results. Originality/value - A thorough comparison of various gas sensing methods in resistance gas sensors is presented and supported by exemplary practical applications.
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| 6. |
- Turner, Anthony, 1950-
(författare)
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Making sense of the environment
- 1997
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Ingår i: Sensor Review. - : Emerald Group Publishing Limited. - 0260-2288.
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Tidskriftsartikel (refereegranskat)
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| 7. |
- Van Der Riet, Drew, et al.
(författare)
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Sensory system integration of the designed mechatronics Touch Hand
- 2016
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Ingår i: Sensor Review. - 0260-2288. ; 36:2, s. 158-168
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Tidskriftsartikel (refereegranskat)abstract
- Purpose - This paper aims to explore the electronic design of the Touch Hand: a low-cost electrically powered prosthetic hand. The hand is equipped with an array of sensors allowing for position control and haptic sensation. Pressure sensors are used on the fingertips to detect grip force. A temperature sensor placed in the fingertip is used to measure the contact temperature of objects. Investigations are made into the use of cantilever vibration sensors to detect surface texture and object slippage. The hand is capable of performing a lateral grip of 3.7 N, a power grip of 19.5 N and to passively hold a weight of up to 8 kg with a hook grip. The hand is also tested on an amputee and used to perform basic tasks. The amputee took 30 min to learn how to operate the hands basic gripping functions. Design/methodology/approach - Problems of previous prosthetic hands were investigated, followed by ways to improve or have similar capabilities, yet keeping in mind to reduce the price. The hand was then designed, simulated, developed and then tested. The hand was then displayed to public and tested with an amputee. Findings - The Touch Hand's capabilities with the usage of the low-cost materials, components and sensory system was obtained in the tests that were conducted. The results are shown in this paper to identify the appropriateness of the sensors for a usage while the costs are reduced. Furthermore, models were developed from the results obtained to take into account factors such as the non-slip material. Research limitations/implications - The research was restricted to a US$1,000 budget to allow the availability of a low-cost prosthetic hand. Practical implications - The Touch Hand had to have the ability to supply the amputee with haptic feedback while allowing the basic grasping of objects. The commercial value is the availability of an affordable prosthetic hand that can be used by amputees in Africa and other Lower-Income countries, yet allowing a more advanced control system compared to the pure mechanical systems currently available. Social implications - The Touch Hand has the ability to give amputees affected in war situations the ability to grasp objects in a more affordable manner compared to the current available options. Feedback from amputees about the current features of the Touch Hand was very positive and it proves to be a way to improve society in Lower-Income countries in the near future. A sponsorship program is being developed to assist amputees with the costs of the Touch Hand. Originality/value - The contributions of this research is a low-cost prototype system than can be commercialized to allow amputees in the Lower-Income countries to have the ability of a prosthetic hand. A sensory system in the hand is also explained which other low-cost prosthetic hands do not have, which includes temperature, force and vibration. Models of the sensors used that are developed and calibrated to the design of the hand are also described.
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