Sensing and Analyzing the Acoustic Response of Avocado and Mango Using a Flexible Piezoelectric Transducer

Shmulevich, I.; Galili, N.; Benichou, N.

doi:10.17660/actahortic.1998.421.11

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, methods for evaluating mechanical characteristics have been evaluated which helped in developing sorting techniques. A few of these approaches depend on the vibrational behavior of fruit and provide an overall sense of firmness" [7,8,9]. "The impact force of kiwi is used to determine fruit firmness in a pre-commercial fruit firmness grader for kiwi" [10].…”

Section: The Firmness Problem In Testingmentioning

confidence: 99%

An Overview of Precision Farming

Rimpika,

Anushi,

Manasa

et al. 2023

IJECC

View full text Add to dashboard Cite

With respect to conventional farming precision agriculture increases average yields by limiting the wastage by calculating the exact required quantities of inputs. One major issue in India is the relatively small and scattered landholdings. In India 58% of the cultivable land is less than 1ha under single owner. The agricultural production system is the result of a complex interplay between seed, soil, water, and agrochemicals (including fertilizers). As a result, judicious control of all inputs is critical for the long-term viability of such a complex system. Precision agriculture is the use of technology and techniques to control the geographical and temporal variability associated with all aspects of agricultural production to improve output and environmental quality. Precision agricultural success is dependent on an accurate assessment of variability, its management, and evaluation in the space-time continuum of crop production. Precision agriculture's agronomic performance has been highly impressive in sugar beet, sugarcane, tea, and coffee crops. Due to lack of knowledge of space-time continuum the economic benefits environmental and social advantages are not explored yet. Precision agriculture is a relatively new field that integrates cutting-edge geographic technology with farming scenarios to optimize inputs, eliminate waste, and maximize returns. Precision farming systems are intended for use in many sorts of agricultural systems, ranging from row crops to dairy, and the technology has experienced extensive acceptance in the United States and across the globe.

show abstract

Section: The Firmness Problem In Testingmentioning

confidence: 99%

An Overview of Precision Farming

Rimpika,

Anushi,

Manasa

et al. 2023

IJECC

View full text Add to dashboard Cite

show abstract

“…AE is sometimes called “passive AE,” as opposed to active AE caused by external factors such as hammers and pendulums that are also used for material characterization (Chen et al. 1996; Shmulevich et al. 1998; Zude et al.…”

Section: Introductionmentioning

confidence: 99%

“…describes a source of signal, thereby the properties of the material in the source. AE is sometimes called "passive AE," as opposed to active AE caused by external factors such as hammers and pendulums that are also used for material characterization (Chen et al 1996;Shmulevich et al 1998;Zude et al 2005). In the passive method, the signal is generated by the material itself and an external factor only stimulates this generation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mannitol Treatment on Ultrasound Emission During Texture Profile Analysis of Potato and Apple Tissue

Zdunek¹,

Bednarczyk

2006

Journal of Texture Studies

View full text Add to dashboard Cite

An ultrasound acoustic emission (AE) signal was recorded during texture profile analysis (TPA) of potato and apple tissue with different texture. The acoustic sensor was in contact with the sample through solid medium. Texture of the tissue was controlled by soaking it in different mannitol solutions. Both TPA and AE parameters change with the texture of potato and apple samples. However, correlation coefficients of linear regression of acoustic parameters are higher than TPA parameters and all of them are significant at a higher confidence level. Critical stress and strain indicate micro‐cracking of the material and they increase with decreasing tissue turgor. The ratio of the critical stress to hardness allows an analysis of sound duration. The sound lasts longer when the tissue is more turgid as a result of the decrease of critical stress to hardness ratio. Counts of AE recorded in the whole TPA test decreased logarithmically with tissue osmolality. The article showed that contact AE can be used for texture evaluation of potato and apple tissue.

show abstract

“…One such approach involves the use of acoustic methods. Polderdijk et al (2000), Shmulevich (2003), and Shmulevich et al (1998) measured the first resonant frequency generated from fruits after being struck by a small pendulum or hammer, whereas Subedi and Walsh (2009) measured the sound velocity and Mizrach et al (1997) measured the ultrasonic attenuation, revealing positive correlations between the numerical value (e.g., the EI) obtained using these nondestructive methods and the penetrometer reading. However, because a device that can detect and measure an effective clear resonance frequency has not yet been developed, these approaches could not accurately assess flesh firmness and were thus not put into practical use.…”

mentioning

confidence: 99%

Effects of Ripening Stage, Temperature, and Film Wrapping on the Elasticity Index as Determined by a Nondestructive Resonance Vibration Method and Fruit Quality in ‘Irwin’ Mango

Fukuda¹,

Sakurai²

2014

horts

View full text Add to dashboard Cite

We examined the effects of ripening stage, temperature, film wrapping, and storage period on the elasticity index (EI) and fruit quality of ‘Irwin’ mangos to develop a storage technique for improving the storage life of this fruit and to determine whether flesh firmness can be estimated using the EI. The second resonant frequency measured between the two sides of the fruit was nearly equal to measurements between the dorsal and ventral surfaces of the fruit. The EI declined as fruit ripening progressed and was not influenced by fruit size. Fruits harvested at the pre-natural fruit drop stage (pre-NFDS; 2 to 3 days before fruit drop) and the post-natural fruit drop stage (post-NFDS) were kept at 25 °C for 10 days. No significant differences were detected between fruits at these two stages in terms of the EI and flesh firmness, except that both variables at the pre-NFDS were higher than those at the post-NFDS after 0 and 4 days and after 0 day of storage, respectively. Similarly, no significant differences were found between fruits at these two stages in terms of total sugar and organic acid contents, regardless of the length of the storage period. Fruits harvested at pre-NFDS were individually wrapped in low-density polyethylene film (11 μm thick) and stored at 10, 15, 20, and 25 °C for 10 days. The EI of fruits kept at 10 °C was higher than that of fruits stored at 15 to 25 °C regardless of the presence of film wrapping. At 10 °C storage, the EI of film-wrapped fruits was higher than that of non-film-wrapped fruits. Film-wrapped fruits harvested at pre-NFDS were stored at 10 °C for 30 days. After 15 days in storage, relatively rapid and then gradual declines in both the EI and flesh firmness were observed. Sugar content was unaffected by the storage period, but organic acid content decreased after 30 days in storage. A strong positive correlation was found between the EI and flesh firmness. When the data set was limited to fruits less than 20 N·cm−2 in flesh firmness and more than 350 g in weight, the correlation coefficient was higher compared with a data set with all fruit combined. The results of this study indicate that flesh firmness in ‘Irwin’ mangos can be estimated by measuring the EI. Moreover, the ripening stage, storage temperature, and film wrapping affected the retention of fruit quality.

show abstract

Sensing and Analyzing the Acoustic Response of Avocado and Mango Using a Flexible Piezoelectric Transducer

Cited by 3 publications

References 0 publications

An Overview of Precision Farming

An Overview of Precision Farming

Effect of Mannitol Treatment on Ultrasound Emission During Texture Profile Analysis of Potato and Apple Tissue

Effects of Ripening Stage, Temperature, and Film Wrapping on the Elasticity Index as Determined by a Nondestructive Resonance Vibration Method and Fruit Quality in ‘Irwin’ Mango

Contact Info

Product

Resources

About