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Julián Castellanos Ramos   Mr.  Technician or Assistant 
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Julián Castellanos Ramos published an article in May 2011.
Top co-authors See all
Fernando Vidal-Verdú

55 shared publications

Department of Electronics, Institute of Biomedical Research of Málaga (IBIMA), University of Málaga, 29071 Málaga, Spain;(J.C.-R.);(F.V.-V.)

José A. Hidalgo-López

15 shared publications

Departamento de Electrónica, Andalucía Tech, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain

Óscar Oballe-Peinado

14 shared publications

Departamento de Electrónica, Universidad de Málaga, Málaga, Spain

Javier Serón

7 shared publications

Departamento de Ingeniería de Sistemas y Automática, University of Málaga, Málaga 29071, Spain; s:(J.S.);(A.G.-C.)

Rafael Navas-González

6 shared publications

Universidad de Málaga; Málaga Spain

Publication Record
Distribution of Articles published per year 
Total number of journals
published in
Article 6 Reads 18 Citations A Large Area Tactile Sensor Patch Based on Commercial Force Sensors Fernando Vidal-Verdú, Maria Jose Barquero, Julián Castellano... Published: 19 May 2011
Sensors, doi: 10.3390/s110505489
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
This paper reports the design of a tactile sensor patch to cover large areas of robots and machines that interact with human beings. Many devices have been proposed to meet such a demand. These realizations are mostly custom-built or developed in the lab. The sensor of this paper is implemented with commercial force sensors. This has the benefit of a more foreseeable response of the sensor if its behavior is understood as the aggregation of readings from all the individual force sensors in the array. A few reported large area tactile sensors are also based on commercial sensors. However, the one in this paper is the first of this kind based on the use of polymeric commercial force sensing resistors (FSR) as unit elements of the array or tactels, which results in a robust sensor. The paper discusses design issues related to some necessary modifications of the force sensor, its assembly in an array, and the signal conditioning. The patch has 16 × 9 force sensors mounted on a flexible printed circuit board with a spatial resolution of 18.5 mm. The force range of a tactel is 6 N and its sensitivity is 0.6 V/N. The array is read at a rate of 78 frames per second. Finally, two simple application examples are also carried out with the sensor mounted on the forearm of a rescue robot that communicates with the sensor through a CAN bus.
Article 4 Reads 21 Citations Three realizations and comparison of hardware for piezoresistive tactile sensors. Fernando Vidal-Verdú, Óscar Oballe-Peinado, José A. Sánchez-... Published: 17 March 2011
Sensors, doi: 10.3390/s110303249
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
Tactile sensors are basically arrays of force sensors that are intended to emulate the skin in applications such as assistive robotics. Local electronics are usually implemented to reduce errors and interference caused by long wires. Realizations based on standard microcontrollers, Programmable Systems on Chip (PSoCs) and Field Programmable Gate Arrays (FPGAs) have been proposed by the authors for the case of piezoresistive tactile sensors. The solution employing FPGAs is especially relevant since their performance is closer to that of Application Specific Integrated Circuits (ASICs) than that of the other devices. This paper presents an implementation of such an idea for a specific sensor. For the purpose of comparison, the circuitry based on the other devices is also made for the same sensor. This paper discusses the implementation issues, provides details regarding the design of the hardware based on the three devices and compares them.