scholarly journals Detection of Foreign Bodies in Soft Foods Employing Tactile Image Sensor

2021 ◽  
Vol 8 ◽  
Author(s):  
Kazuhiro Shimonomura ◽  
Tinghsuan Chang ◽  
Tomomi Murata
Keyword(s):  
Foreign Bodies ◽  
High Sensitivity ◽  
Tactile Sensor ◽  
Image Sensor ◽  
Target Object ◽  
Sensor Surface ◽  
Foreign Objects ◽  
Inspection Process ◽  
Tactile Image ◽  
Inspection Work

In the inspection work involving foodstuffs in food factories, there are cases where people not only visually inspect foodstuffs, but must also physically touch foodstuffs with their hands to find foreign or undesirable objects mixed in the product. To contribute to the automation of the inspection process, this paper proposes a method for detecting foreign objects in food based on differences in hardness using a camera-based tactile image sensor. Because the foreign objects to be detected are often small, the tactile sensor requires a high spatial resolution. In addition, inspection work in food factories requires a sufficient inspection speed. The proposed cylindrical tactile image sensor meets these requirements because it can efficiently acquire high-resolution tactile images with a camera mounted inside while rolling the cylindrical sensor surface over the target object. By analyzing the images obtained from the tactile image sensor, we detected the presence of foreign objects and their locations. By using a reflective membrane-type sensor surface with high sensitivity, small and hard foreign bodies of sub-millimeter size mixed in with soft food were successfully detected. The effectiveness of the proposed method was confirmed through experiments to detect shell fragments left on the surface of raw shrimp and bones left in fish fillets.

scholarly journals Intruding implements: a pictorial review of retained surgical foreign objects in neuroradiology

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Alessandra D’Amico ◽  
Teresa Perillo ◽  
Lorenzo Ugga ◽  
Renato Cuocolo ◽  
Arturo Brunetti
Keyword(s):  
Differential Diagnosis ◽  
Foreign Body ◽  
Foreign Bodies ◽  
Correct Identification ◽  
Pathophysiological Mechanism ◽  
Local Inflammatory Response ◽  
Inflammatory Reactions ◽  
Foreign Objects ◽  
Pictorial Review ◽  
Review Reports

AbstractIntra-cranial and spinal foreign body reactions represent potential complications of medical procedures. Their diagnosis may be challenging as they frequently show an insidious clinical presentation and can mimic other life-threatening conditions. Their pathophysiological mechanism is represented by a local inflammatory response due to retained or migrated surgical elements. Cranial interventions may be responsible for the presence of retained foreign objects represented by surgical materials (such as sponges, bone wax, and Teflon). Spinal diagnostic and therapeutic procedures, including myelography, chordotomy, vertebroplasty, and device implantation, are another potential source of foreign bodies. These reactions can also follow material migration or embolization, for example in the case of Lipiodol, Teflon, and cement vertebroplasty. Imaging exams, especially CT and MRI, have a central role in the differential diagnosis of these conditions together with patient history. Neuroradiological findings are dependent on the type of material that has been left in or migrated from the surgical area. Knowledge of these entities is relevant for clinical practice as the correct identification of foreign bodies and related inflammatory reactions, material embolisms, or migrations can be difficult. This pictorial review reports neuroradiological semeiotics and differential diagnosis of foreign body-related imaging abnormalities in the brain and spine.

Fabrication of Piezoelectric Polyvinylidene Fluoride (PVDF) Polymer-Based Tactile Sensor Using Electrospinning Method

2016 ◽  
Vol 12 ◽  
pp. 42-50 ◽  
Author(s):  
N. Manikandan ◽  
S. Muruganand ◽  
K. Sriram ◽  
P. Balakrishnan ◽  
A. Suresh Kumar
Keyword(s):  
Polyvinylidene Fluoride ◽  
Biomedical Application ◽  
Electric Pulse ◽  
High Sensitivity ◽  
Tactile Sensor ◽  
Main Role ◽  
Nano Structure ◽  
Sem Image ◽  
Β Phase ◽  
Α Phase

The polyvinylidene fluoride (PVDF) nanofiber has widely investigated as a sensor and transducer material, because of its high piezo and Ferro electric properties. The novel nano structure of PVDF has attracted considerable interest in the bio sensing and biomedical application. This paper deals with PVDF Tactile sensor. Basically The PVDF acts as piezoelectric effect which convert load into electrical signals. The tactile sensor has a main role for visual handicap and robotics. Any physical activities of robotic in all industrial the tactile sensor is a crucible role, whether it can left the object or handling glass parts pressure of object is main. The Sandwich type PVDF base tactile sensor has been fabricated using nanofiber. Using electro spinning method, the PVDF based nanofiber coated over coper the electrodes. In normal, the PVDF has α-phase and while applying electric pulse the PVDF polymer would be changed from α-phase into β-phase. Only in β-phase, the PVDF act as piezo electrics sensor and measure the piezoelectricity simultaneously measure pressure and temperature in real time. The pressure was monitored from the change in the electrical resistance via the piezo resistance of the material. The enhancement of PVDF properties has been carried by using SEM. The SEM image result showed that the size of nanofiber, the size of nanofiber is varied in the range of (180 nm-400 nm) with smooth surface. The X-Ray diffraction has shown that the PVDF was aggregated with the β-phase crystalline nature. Due to β-phase it was act as a piezo electric prosperity’s and its results are very high sensitivity.

scholarly journals [Paper] A Low Noise and High Sensitivity Image Sensor with Imaging and Phase-Difference Detection AF in All Pixels

2016 ◽  
Vol 4 (2) ◽  
pp. 123-128 ◽  
Author(s):  
Masahiro Kobayashi ◽  
Michiko Johnson ◽  
Yoichi Wada ◽  
Hiromasa Tsuboi ◽  
Hideaki Takada ◽  
...  
Keyword(s):  
Phase Difference ◽  
High Sensitivity ◽  
Image Sensor ◽  
Low Noise ◽  
Difference Detection

scholarly journals A low-cost, human-like, high-resolution, tactile sensor based on optical fibers and an image sensor

2018 ◽  
Vol 15 (4) ◽  
pp. 172988141878363 ◽  
Author(s):  
Utku Büyükşahin ◽  
Ahmet Kırlı
Keyword(s):  
High Resolution ◽  
Spatial Resolution ◽  
Fiber Optic ◽  
Low Cost ◽  
Experimental Studies ◽  
Main Idea ◽  
Tactile Sensor ◽  
Image Sensor ◽  
Sensor Design ◽  
Tactile Sensors

Tactile sensors are commonly a coordinated group of receptors forming a matrix array meant to measure force or pressure similar to the human skin. Optic-based tactile sensors are flexible, sensitive, and fast; however, the human fingertip’s spatial resolution, which can be regarded as the desired spatial resolution, still could not be reached because of their bulky nature. This article proposes a novel and patented optic-based tactile sensor design, in which fiber optic cables are used to increase the number of sensory receptors per square centimeter. The proposed human-like high-resolution tactile sensor design is based on simple optics and image processing techniques, and it enables high spatial resolution and easy data acquisition at low cost. This design proposes using the change in the intesity of the light occured due to the deformation on contact/measurement surface. The main idea is using fiber optic cables as the afferents of the human physiology which can have 9 µm diameters for both delivering and receiving light beams. The variation of the light intensity enters sequent mathematical models as the input, then, the displacement, the force, and the pressure data are evaluated as the outputs. A prototype tactile sensor is manufactured with 1-mm spatial and 0.61-kPa pressure measurement resolution with 0–15.6 N/cm2 at 30 Hz sampling frequency. Experimental studies with different scenarios are conducted to demonstrate how this state-of-the-art design worked and to evaluate its performance. The overall accuracy of the first prototype, based on different scenarios, is calculated as 93%. This performance is regarded as promising for further developments and applications such as grasp control or haptics.

Bridge Inspection and Management System Based on Smart Phone

2016 ◽  
Author(s):  
Yanbing Ding ◽  
Ruicong Han ◽  
Hao Liu ◽  
Shengyuan Li ◽  
Xuefeng Zhao ◽  
...  
Keyword(s):  
Management System ◽  
Smart Phone ◽  
Mobile Network ◽  
Technical Condition ◽  
Bridge Inspection ◽  
Condition Rating ◽  
Inspection Process ◽  
Inspection Work ◽  
Inspection Data ◽  
User Friendly

For the traditional inspection methods, the visual inspection data is firstly recorded on the inspection forms and then input manually into computer, which is inefficient and creates errors frequently. This research aims at establishing a smartphone-based bridge inspection and management system that can avoid such inputting errors and facilitate the bridge inspection process. The system enables the inspector to complete the inspection information collection in a portable smart phone. The site photos that related to the investigated structures can be easily added and edited during the inspection work with the help of the smart phone. After the investigation, the inspection report and the technical condition rating of the inspected bridge can be automatically generated. The collected data and the GPS information can be uploaded to the terminal server directly via the mobile network. The interface of the mobile software is user-friendly and easy operation, which provides an opportunity for the public to take part in the bridge inspection work, especially for the bridges in rural and mountainous areas. Then, this paper puts forward the relevant ideas on public participation in bridges’ emergency assessment and disposal after the disaster, which can provide data support for the decision-making and disaster relief work.

A 1/2.5 inch VGA 400 fps CMOS Image Sensor With High Sensitivity for Machine Vision

2014 ◽  
Vol 49 (10) ◽  
pp. 2342-2351 ◽  
Author(s):  
Ruoyu Xu ◽  
Wai Chiu Ng ◽  
Jie Yuan ◽  
Shouyi Yin ◽  
Shaojun Wei
Keyword(s):  
Machine Vision ◽  
High Sensitivity ◽  
Cmos Image Sensor ◽  
Image Sensor

A Flexible Tactile Sensor Based on Porous Graphene Sponge for Tiny Force Measurement

2018 ◽  
Author(s):  
Lingfeng Zhu ◽  
Yancheng Wang ◽  
Xin Wu ◽  
Deqing Mei
Keyword(s):  
Force Measurement ◽  
High Sensitivity ◽  
Tactile Sensor ◽  
Tactile Sensors ◽  
Force Detection ◽  
Pressure Sensing ◽  
Porous Graphene ◽  
Graphene Sponge ◽  
Healthcare Monitoring ◽  
Working Principle

Flexible tactile sensors have been utilized for epidermal pressure sensing, motion detecting, and healthcare monitoring in robotic and biomedical applications. This paper develops a novel piezoresistive flexible tactile sensor based on porous graphene sponges. The structural design, working principle, and fabrication method of the tactile sensor are presented. The developed tactile sensor has 3 × 3 sensing units and has a spatial resolution of 3.5 mm. Then, experimental setup and characterization of this tactile sensor are conducted. Results indicated that the developed flexible tactile sensor has good linearity and features two sensitivities of 2.08 V/N and 0.68 V/N. The high sensitivity can be used for tiny force detection. Human body wearing experiments demonstrated that this sensor can be used for distributed force sensing when the hand stretches and clenches. Thus the developed tactile sensor may have great potential in the applications of intelligent robotics and healthcare monitoring.

Removal of Coins From the Esophagus: Nothing New Under the Sun

PEDIATRICS ◽  
1973 ◽  
Vol 51 (2) ◽  
pp. 313-313
Author(s):  
Jack H. T. Chang ◽  
John D. Burrington
Keyword(s):  
Alimentary Canal ◽  
Foreign Bodies ◽  
Recent Literature ◽  
Seventh Century ◽  
The Sun ◽  
Foreign Objects ◽  
Byzantine Period

In the recent literature there appears to be a revival of interest in the use of Foley catheters in removing foreign objects from both orifices of the alimentary canal.1-3 During the peak of the Byzantine period, foreign bodies were extracted from the esophagus by having the patient swallow a small, dry sponge on a string, allowing it to expand in the stomach and then withdrawing the sponge. Paulus Aegineta (seventh century) wrote in Book Six of his Epitome of Medicine:

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