Homing Sensor

Pharmaceuticals, healthcare, and life sciences New nanostructured drugs, gene and drug delivery systems biocompatible replacements for body parts and fluids, self-diagnostics for use in the home, sensors for labs-on-a-chip, material for bone and tissue regeneration blood replacement... 

Homing sensor system design for a 2D iong range nanopositioning... 

Keywords homing sensor nanometer resolution positioning system PSD... 

Each homing sensor consists of two photomicrosensors separated 30 mm each other and one grey gradation sheet with movement in the X and Y axis, detecting each photomicrosensor one half of the gradation sheet (Figure 1). In a first step, described in this work, it was decided to verify the system behavior in one dimension along the X axis. 

Figure 4. Homing sensor assembling Location of the homing sensor system...

Three homing sensors will be placed on the two-dimensional moving platform. Two sensor sets are opposite mounted along the Y axis and one set is mounted along the X axis. This provides the... 

Analysis and design of the homing sensor control circuit... 

The homing sensor system is controlled with a circuit which has an output signal, DC voltage, proportional to the intensity of light detected by the two photomicrosensors through the gradation sheet. To overcome this, it is designed a specific electronic control circuit. 

The last part of this work was the experimental characterization of the whole system. The photomicrosensors and gradation sheet were tested and the integration feasibility of the PSD into the homing sensor system was verified. Finally, both testing results were compared in order to verify the suitability of both measuring systems integration. 

The second step in the testing procedure was the characterization of the set PSD and LED to evaluate its accuracy and correct any visible nonlinear behavior of the PSD. The final target was its integration into the homing sensor system. 

Figure 6. Homing sensor system accuracy test planning (PSD - LED)...

Considering the findings of the analysis and the experimental procedure followed in this study, it could be concluded that both solutions integrated in the homing sensor system designed, photomicrosensors and PSD, are viable and adequate for the requirements of 2D moving platform. 

For ocean spills, remote sensing data can provide information on the rate and direction of oil movement through multi-temporal imaging and input to drift prediction modelling. Remote sensing of the sea surface can be performed from groimd based, aircraft and space home sensors. 

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