Abstract: A vehicle surroundings monitoring device in which reflection by a mirror is reduced to ensure the desired performance of distance measurement even in a short-distance range. The monitoring device for monitoring surroundings around a vehicle has a transmitting antenna provided in a door mirror assembly of the vehicle to radiate transmitted waves through a mirror surface of the door mirror, and a receiving antenna provided in the door mirror assembly to receive, through the door mirror surface, reflected waves from an object existing near the vehicle. In the this monitoring device, electric wave transmission surfaces are formed as portions of the door mirror surface corresponding to openings surfaces for the transmitting and receiving antennas to limit reflection by the door mirror surface and to enable transmission of electric waves through the door mirror surface.

Abstract: A vehicle surroundings monitoring device in which reflection by a mirror is reduced to ensure the desired performance of distance measurement even in a short-distance range. The monitoring device for monitoring surroundings around a vehicle has a transmitting antenna provided in a door mirror assembly of the vehicle to radiate transmitted waves through a mirror surface of the door mirror, and a receiving antenna provided in the door mirror assembly to receive, through the door mirror surface, reflected waves from an object existing near the vehicle. In the this monitoring device, electric wave transmission surfaces are formed as portions of the door mirror surface corresponding to openings surfaces for the transmitting and receiving antennas to limit reflection by the door mirror surface and to enable transmission of electric waves through the door mirror surface.

Abstract: A vehicle surroundings monitoring device capable of performing distance measurement as desired even in a short-distance range to provide unerring alarm information to a driver. The monitoring device for monitoring surroundings around a vehicle has a transmitting antenna provided in a door mirror assembly of the vehicle to radiate transmitted waves through a mirror surface of the door mirror, and a receiving antenna provided in the door mirror assembly to receive reflected waves from an object existing near the vehicle through the door mirror surface. The monitoring device also has a stray electric wave limiting member for reducing electric wave components straying from the transmitting antenna into the receiving antenna.

Abstract: A range finding device of scanning type including a laser beam emitting means which emits pulse laser beams from a single light source while changing an emission angle and scanning, and a range finding means for detecting a range from an object from reciprocating times of the pulse laser beams reflected by the object, wherein the scan is conducted by shifting the pulse laser beams for each scan and the amount of shifting the beams is a value obtained by equally dividing an interval of the beams into a plural, whereby the range from the object can be measured at a high rate in many directions with a low cost, and an angular resolution in horizontal directions, an accuracy of relative position and an accuracy of relative velocity of the object are improved, and a time lag in judging a horizontal direction angle of the object can be minimized.

Abstract: An alarm device for vehicle operable at a time of changing lanes which does not alert in case of congestion by inputting an obstacle by a scan laser radar 1, recognizing the obstacle by a obstacle recognizing means 9 based on thus inputted information, recognizing the congestion by a lane state recognizing means 10 based on thus recognized obstacle and a state of peripheral lane, setting an optimum area for alerting by an alarm determining means 11 based on thus recognized state of lane, and conducting an alarm by an alarm means 7 based on the obstacle within the optimum area for alerting.