초록 ▼

An inexpensive, reliable analog ramped-voltage timing device (34, 36, 38, 40, 44) can be used in a laser echo ranging device capable of resolution in the decimeter range by using a very steep ramp (42), and a flash A/D converter (50) to instantaneouly sample the ramped voltage upon receipt of the la

An inexpensive, reliable analog ramped-voltage timing device (34, 36, 38, 40, 44) can be used in a laser echo ranging device capable of resolution in the decimeter range by using a very steep ramp (42), and a flash A/D converter (50) to instantaneouly sample the ramped voltage upon receipt of the laser echo.

대표청구항 ▼

A laser range echo device for measuring distances in the decimeter range, comprising: (a) laser beam transmitting means for transmitting a pulse of laser light toward a target; (b) start pulse generating means for generating a start pulse upon transmission of said laser pulse; (c) laser receiver mea

A laser range echo device for measuring distances in the decimeter range, comprising: (a) laser beam transmitting means for transmitting a pulse of laser light toward a target; (b) start pulse generating means for generating a start pulse upon transmission of said laser pulse; (c) laser receiver means for generating a stop pulse in response to the receipt of the reflection of said laser light pulse from said target; (d) a high-speed switch arranged to be actuated for a predetermined time following the onset of said start pulse; (e) capacitive means for producing a ramp voltage in response to the actuation of said switch, said ramped voltage changing substantially linearly from a starting value to an ending value in a matter of nanoseconds; and (f) a flash A/D converter arranged to sample the instantaneous value of said ramped voltage in response to said stop pulse; (g) whereby said flash A/D converter provides a digital representation of said instantaneous value with an accuracy sufficient to digitally represent the travel distance of said laser light pulse in increments in the decimeter range.