Quality Analysis of Pear Fruit of Shah Miveh variety Using Nondestructive Ultrasonic Technique
Journal Title: Journal of Agricultural Machinery - Year 2014, Vol 4, Issue 2
Abstract
Development of ultrasound technique has not been progressing for evaluating the internal quality of fruits as fast as that of processed foods. In this research for quality assessment of pear fruit (Shah Miveh variety) an ultrasonic measurement system was constructed to transmit and receive the ultrasonic waves. The apparatus included a pulser-receiver, a pair of 75 kHz ultrasonic transducers with exponential horn, and a computer system for data acquisition and analysis. Several mechanical and chemical properties, including firmness, TSS, acidity, elastic modulus, pH and total dry matter for destructive quality assessment were measured. Velocity and attenuation of ultrasonic waves for nondestructive tests were also measured. The fruit quality levels for the experiment were: unripe, ripe and overripe. The results of tests showed that firmness was the best parameter for measuring fruit quality, as it decreased significantly with ripeness. The effect of ripeness on the velocity and attenuation of ultrasonic waves was also significant. Investigation showed a positive linear relationship between fruit firmness and wave velocity (R2=0.81). Furthermore, the relationship between fruit firmness and attenuation was exponential and wave attenuation decreased with increasing fruit firmness (R2=0.895). The Relationship between ultrasonic properties and fruit modulus of elasticity showed that the wave velocity increased and attenuation decreased with âincreasing elasticity. It can be concluded that the ultrasonic instrument equipped with exponential horns can effectively be utilized for pear quality assessment based on measurement of wave velocity and attenuation.
Authors and Affiliations
R. Meamar Dastjerdi,S. Minaei,M. H. Khoshtaghaza,
Keywords
Related Articles
- EP ID EP717715
- DOI -
- Views 36
- Downloads 0
Evaluation of the Energy Efficiency of a Solar Parabolic Collector Equipped with Phase Change Materials inside the Receiver Tube of a Desalination System
IntroductionWith increasing the world's population, the demand for supply water resources is also increasing. Nevertheless, climate change has severely impacted the accessibility of fresh water resources. Consequently, r...
Testing and evaluation of a rototiller with new ridged blades
Introduction Recently, employment of rotary tillers has been expanded in gardens and small farms, especially in the northern of Iran. However using the L-shaped blades in the conventional rotary tillers have some problem...
Analytical and Experimental Draft Force Evaluation of Plastic Coated Chisel Tines
Introduction Improving the efficiency of all agricultural operations has always been important for farmers and engineers. It is well known that the force required for cutting a soil using narrow blades is a function of s...
Semi-mechanized Harvesting of the Safflower Petals in Comparison with Conventional Method
IntroductionSafflower (Carthamus tinctorius L.) is an oil plant with a growth cycle of 120 days. The seeds of this crop are primarily used for oil production, while its flower petals are used for extracting natural pigme...
Estimation and Selection of Fuel Consumption Forecasting Model for MF399 Tractor (Case study: Pars Abad Region of Moghan)
IntroductionConsidering the high consumption of diesel fuel in the agricultural sector, it is necessary to find solutions to reduce its consumption, and it will be feasible to have a convenient mathematical model more ea...