New Structure of Two-Dimensional Position Sensitive Semiconductor Detector and Application

Yamamoto, K.; Yamaguchi, S.; Terada, Y.

doi:10.1109/tns.1985.4336870

Cited by 23 publications

(3 citation statements)

References 12 publications

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“…To improve the accuracy of the lateral displacement measurement, we adopted a pin‐cushion‐type PSD with low dark current. (S2044, Hamamatsu Photonics K.K., Shizuoka, Japan) [15]. The accuracy of the PSD in position sensing has been proved to be 0.6 µm by the manufacturer.…”

Section: Experimental Methodsmentioning

confidence: 99%

Development of lateral displacement sensor for real‐time detection of structural damage

Matsuya

Tomishi

Sato

et al. 2011

IEEJ Transactions Elec Engng

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We have developed a novel sensor that enables us to measure the relative story displacement of a building structure in real time. This lateral displacement sensor (LDS) is composed of a light‐emitting diode (LED) array, which is fixed on the ceiling, and a position‐sensitive detector (PSD) unit, which is placed on the floor. We optimized the LDS to achieve high accuracy in lateral displacement measurement. The accuracy was evaluated to be 60 µm by conducting shaking table tests. Two LDSs were implemented in an actual building equipped with an active variable stiffness (AVS) system, and the building was vibrated with seismic waveforms by an exciter placed on the rooftop. The seismic displacement of the second floor relative to the first floor was measured using the LDS. Furthermore, the inclination angle of the second floor could be measured using the LDS during the seismic vibration. Using the AVS system, we realized the residual displacement of the second floor without inducing damage to the building, and succeeded in real‐time residual displacement measurement for the first time. These results indicate that the LDS is useful for the health diagnosis of a building structure. © 2011 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Experimental Methodsmentioning

confidence: 99%

Development of lateral displacement sensor for real‐time detection of structural damage

Matsuya

Tomishi

Sato

et al. 2011

IEEJ Transactions Elec Engng

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“…There are two pairs of output electrodes in a two-dimensional PSD – X-axis electrode pair and Y-axis electrode pair. The current produced at an electrode depends on the intensity and position of the centroid of the light striking the PSD [28]. With regards to an electrode pair, the electrode located nearer to the light centroid will produce more current than the other.…”

Section: System Descriptionmentioning

confidence: 99%

A micro motion sensing system for micromanipulation tasks

Latt

Tan

Georgiou

et al. 2012

Sensors and Actuators A: Physical

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An optical-based motion sensing system has been developed for real-time sensing of instrument motion in micromanipulation. The main components of the system consist of a pair of position sensitive detectors (PSD), lenses, an infrared (IR) diode that illuminates the workspace of the system, a non-reflective intraocular shaft, and a white reflective ball attached at the end of the shaft. The system calculates 3D displacement of the ball inside the workspace using the centroid position of the IR rays that are reflected from the ball and strike the PSDs. In order to eliminate inherent nonlinearity of the system, calibration using a feedforward neural network is proposed and presented. Handling of different ambient light and environment light conditions not to affect the system accuracy is described. Analyses of the whole optical system and effect of instrument orientation on the system accuracy are presented. Sensing resolution, dynamic accuracies at a few different frequencies, and static accuracies at a few different orientations of the instrument are reported. The system and the analyses are useful in assessing performance of hand-held microsurgical instruments and operator performance in micromanipulation tasks.

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“…The measurement systems normally used, the positionsensitive detector (PSD) sensor [4,5] and the charge-coupled device (CCD) sensor [6], are unable to simultaneously satisfy the three requirements listed above. The PSD is a continuous structure.…”

Section: Introductionmentioning

confidence: 99%

A new method for measuring plural light-spot positions in a spatially continuous manner using a sensor array

Baba

Konishi

Furui³

1999

Meas. Sci. Technol.

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Optical measurement systems often need to detect the positions of plural light spots illuminated by various types of light sources. The applications using these systems usually require the measurement performance to be fast, of high accuracy and capable of simultaneously detecting plural points. In this paper, we propose a new method for the measurement of plural light-spot positions that satisfies all three of the requirements listed above. The basic principle of the method is to detect which of the sensor elements produces the peak value and to calculate the actual peak positions of the light spot by employing an analogue interpolating circuit. We have designed and built a prototype position-sensor system that implements the proposed method. The experimental results are as follows: (i) the relative error is at most 1.6%; (ii) the sampling time is 9.5 µs times the number of detected spots; and (iii) the proposed method is insensitive to background light. In addition, with this method one can measure other properties with physical spot-like positions such as pressure and ultrasound.

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New Structure of Two-Dimensional Position Sensitive Semiconductor Detector and Application

Cited by 23 publications

References 12 publications

Development of lateral displacement sensor for real‐time detection of structural damage

Development of lateral displacement sensor for real‐time detection of structural damage

A micro motion sensing system for micromanipulation tasks

A new method for measuring plural light-spot positions in a spatially continuous manner using a sensor array

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