Mitsubishi Electric Corporation

Mitsubishi Electric Tokki Systems Corporation

Hideaki Ochimizu

Shumpei Kameyama

Masaharu Imaki

Nobuki Kotake

Hidenobu Tsuji

Yuichi Nishino

Takashi Saito

Yoshihito Hirano

Mikio Takabayashi

A system controllerdetermines whether the quality of either a distance image or a light intensity image satisfies reference quality, and, when the quality of either the distance image or the light intensity image dos not satisfy the reference quality, outputs a speed change command to lower a speed, an altitude change command to change a submarine altitude (depth), or the like to a navigation control unit, thereby changing a physical relative relation between a measurement planeand a device in question. As an alternative, the system controller changes a beam scanning rate f, a beam divergence &#x3b8;, or the like within limits at which the amount of variation in a spatial resolution does not exceed a permissible amount.

Laser radar device and radar image generating method

A laser radar device includes a searchable distance calculation deviceto calculate an amount of attenuation at a time of propagation of a light wave from a temporal change in scattered light intensity measured by a marine snow measurement device, and calculate a searchable distance in a target search devicefrom the amount of attenuation.

Laser radar device

An S/N calculation circuitto calculate the S/N ratio of a received signal, and an S/N comparison circuitto compare the S/N calculated by the S/N calculation circuitwith a threshold Th are disposed, and a parameter setting circuitcontrols the radiation state of a beam radiated from a transmission optical systemaccording to the result of the comparison performed by the S/N comparison circuit. As a result, even if the state of the propagation environment gets worse, degradation in the communication quality can be prevented and communicative stabilization can be achieved.

Communication device

A laser radar device includes: a pulse laser that outputs transmission light to a target; an transmission optical system that makes the transmission light at a predetermined beam spread angle; a light-receiving element array that receives scattered light from the target and converts the light to an electric signal; an electric circuit array that detects a reception intensity and a reception time from the electric signal; a range/three-dimensional shape output unit that measures a range to the target or a three-dimensional shape of the target on the basis of the reception time; a determination unit that determines whether the beam spread angle is changed or not on the basis of the reception intensity and the reception time; and a control unit that changes the beam spread angle on the basis of a determination result.

Laser radar device, safe landing sensor for planetfall, docking sensor for space apparatus, space debris collection sensor, and vehicle-mounted collision avoidance sensor

Growing community of inventors

Tokyo, Japan

Hideaki Ochimizu