Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Marc Lescure"'
Publikováno v:
IEEE Sensors Journal. 8:1413-1421
This paper deals with the implementation of a CMOS analog neural network (NN) that has to be integrated in a new kind of optoelectronic measurement system. The aim is to achieve real-time surface recognition using a phase-shift rangefinder and a neur
Publikováno v:
Analog Integrated Circuits and Signal Processing. 54:219-227
The feedforward multi-layer perceptron (MLP) type neural network (NN) presented in this paper has been developed for on-board applications of high-speed signal processing. It is fully analog in order to avoid analog---digital conversions and to limit
Publikováno v:
Sensors and Actuators A: Physical. 115:273-279
A dual-control photosensor for laser distance measurement is presented in this work where the desired measurement is determined from a time-of-flight method. Light transmitted by a laser diode is modulated at high frequency and reflected off a target
Publikováno v:
Sensors and Actuators A: Physical. 110:289-293
In this paper, the scanning response of the photocurrent emitted by a large area avalanche photodiode (APD) is studied for a 3D laser camera. This 3D camera is based on a phase-shift laser range-finder to measure distance from 1 to 20 m. To obtain a
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 53:102-108
A feedback laser driver circuit has been developed to control the average optical output power of a double heterostructure CW laser diode and also to operate with a wideband amplitude modulation. The average light power monitoring is realized by meas
Publikováno v:
Journal of Optics A: Pure and Applied Optics. 4:S332-S336
A heterodyne photodetection method is proposed in order to improve the signal to noise ratio of a frequency-modulated-continuous-wave- (FMCW-) like laser range finder. For this purpose, the non-linearity of the current–voltage characteristic of an
Autor:
G Perchet, Marc Lescure
Publikováno v:
Journal of Optics. 29:229-235
A phase-shift expander has been designed for distance measurements with a low-frequency phase-shift laser rangefinder using two coherent indirect frequency synthesizers. Using such a set-up, a theoretical analysis shows that the resolution of the pha
Publikováno v:
Sensors and Actuators A: Physical. 62:534-538
The amplitude of the photoelectric current delivered by the photodiode of a 1–10 m phase-shift laser rangefinder varies by a factor greater than 1000. With high levels, amplitude distortion generates a phase-shift error in mixing circuits. A model
Publikováno v:
European Transactions on Telecommunications. 6:207-216
An experimental wireless infrared network with ISDN compatibility is described. This factory network has been studied in a European project: “FCPN” (Factory Customer Premises Network). The architecture of the network is a cellular one. Infrared c
Publikováno v:
Journal of Optics. 23:117-123
The authors review the recent progress in dynamic interferometry applied to optical distance measurement devices. These techniques are based on modulating laser diodes to obtain a continuous wavelength-shift. Measurements can be done by a fringe coun