An object detection device includes an external sensor, an inertia sensor, and a control device. The external sensor is fixed to a ship. The external sensor detects an object. The inertia sensor detects information related to an inertial force applied to the ship. The control device acquires a state of relative displacement of a detection object on the basis of a signal output from the external sensor. The control device acquires a state of an attitude change of the ship on the basis of a signal output from the inertia sensor. The control device determines whether a detection object is present outside the ship according to a correlation between the state of the attitude change of the ship and the state of the relative displacement of the detection object.

A movable device includes: a mechanism configured to drive a movable portion, the mechanism including: a gear including a first protrusion; and a cam in contact with the movable portion; and a driver to drive the mechanism, the driver including: a second protrusion to engage with the first protrusion; and an actuator to cause the second protrusion to reciprocate in response to application of voltage or electric current, to rotate the gear in a predetermined direction, to rotate the cam with the rotation of the gear to drive the movable portion. The first protrusion has a shape in which a downstream portion in the predetermined direction is lower in a direction perpendicular to the predetermined direction than an upstream portion. The second protrusion has a shape in which a downstream portion in the predetermined direction is higher in the direction perpendicular to the predetermined direction than an upstream portion.

A laser system is provided. The laser system comprises: a seed laser configured to produce a sequence of seed light pulses, wherein the sequence of seed light pulses are produced with variable time intervals in a sweep cycle; a pump laser configured to produce pump light having variable amplitude in the sweep cycle; and a control unit configured to generate a command to the pump laser to synchronize the pump light with the sequence of seed light pulses.

A self-moving device includes a body, a walking assembly arranged on the body, and a control system arranged in the body. The self-moving device further includes an optical receiving device and at least two optical emitting devices arranged on the body. Paths of emitted light emitted by the at least two optical emitting devices are different. The optical receiving device is adapted to receive a reflected light formed after the emitted light emitted by at least one of the optical emitting devices hits an obstacle. A distance measuring method of the self-moving device is also disclosed.

A track intrusion detection system for detecting the presence of human-size intruders in a path of a railway vehicle is disclosed. The track intrusion detection system includes at least one-track module for each entrance of a tunnel railway and a server. Each track module includes at least two sensors and a signal processing unit to indicate the presence of human intruders in the area scanned by the at least two sensors. The system utilizes both measured distance and reflectivity compared with previously recorded distance and reflectivity in an empty tunnel, to assess the presence of a human-size intruder. A predefined masked area may be excluded from alert.

A track intrusion detection system for detecting the presence of human-size intruders in a path of a railway vehicle is disclosed. The track intrusion detection system includes at least one-track module for each entrance of a tunnel railway and a server. Each track module includes at least two sensors and a signal processing unit to indicate the presence of human intruders in the area scanned by the at least two sensors. The system utilizes both measured distance and reflectivity compared with previously recorded distance and reflectivity in an empty tunnel, to assess the presence of a human-size intruder. A predefined masked area may be excluded from alert.

The measurement device acquires positional information of a measurement object stored in a storage unit, and acquires point group information of points indicating a surrounding feature acquired by an external sensor. Then, the measurement device calculates the positional information indicating a predetermined position of the measurement object existing in a predetermined range based on the point group information existing in the predetermined range, and outputs its reliability.

The measurement device acquires positional information of a measurement object stored in a storage unit, and acquires point group information of points indicating a surrounding feature acquired by an external sensor. Then, the measurement device calculates the positional information indicating a predetermined position of the measurement object existing in a predetermined range based on the point group information existing in the predetermined range, and outputs its reliability.

The above measurement device acquires output data from a sensor unit for detecting surrounding feature, and extracts, from the output data, data corresponding to detection result in a predetermined range in a predetermined positional relation with an own position. The predetermined range is determined in accordance with accuracy of the own position. Then, the measurement device executes predetermined processing based on the extracted data.

A control device (100) can communicate with a first sensor (300) for detecting an object around a first vehicle and is equipped on the first vehicle (500). The control device (100) includes a first acquisition unit, a second acquisition unit, a detection unit, and a determination unit. The first acquisition unit acquires a sensing result being a result of detecting an object around the first vehicle (500) from the first sensor (300) equipped on the first vehicle (500). The second acquisition unit acquires positional information of a specified object being an object for performance measurement of the first sensor (300). The detection unit detects the specified object existing within a reference distance from the first vehicle (500), by use of positional information of the first vehicle (500) and positional information of the specified object. The determination unit determines performance of the first sensor (300), based on the sensing result of the specified object by the first sensor (300).