A sensor positioning device includes an inter-sensor distance measurement jig that measures a distance between two sensors, and is a reference when setting the distance between the two sensors to a target distance, and reference-setting jigs of sensor height position, each including a weight and a weight suspension member, a lengthwise direction of which is in a vertical direction when the weight is suspended, and each performing setting of a distance which is a total of a vertical direction dimension of the weight, a length of the weight suspension member, and a distance from an upper end of the weight suspension member to the sensor such that the distance coincides with a target height of the sensor, when the weight is in contact with a reference surface, in a state where the weight is attached to a sensor holding jig by the weight suspension member.
G01S 15/00 - Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
G01B 21/02 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
G01B 21/04 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
G01B 17/00 - Measuring arrangements characterised by the use of infrasonic, sonic, or ultrasonic vibrations
G01D 11/30 - Supports specially adapted for an instrumentSupports specially adapted for a set of instruments
G01S 5/30 - Determining absolute distances from a plurality of spaced points of known location
G01C 3/18 - Measuring distances in line of sightOptical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument with one observation point at each end of the base
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