초록 ▼

An ultrasonic ranging and data telemetry system determines a surveyor\s position and automatically links it with other simultaneously taken survey data. An ultrasonic and radio frequency (rf) transmitter are carried by the surveyor in a backpack. The surveyor\s position is determined by calculations

An ultrasonic ranging and data telemetry system determines a surveyor\s position and automatically links it with other simultaneously taken survey data. An ultrasonic and radio frequency (rf) transmitter are carried by the surveyor in a backpack. The surveyor\s position is determined by calculations that use the measured transmission times of an airborne ultrasonic pulse transmitted from the backpack to two or more prepositioned ultrasonic transceivers. Once a second, rf communications are used both to synchronize the ultrasonic pulse transmission-time measurements and to transmit other simultaneously taken survey data. The rf communications are interpreted by a portable receiver and microcomputer which are brought to the property site. A video display attached to the computer provides real-time visual monitoring of the survey progress and site coverage.

대표청구항 ▼

A method for surveying a property site comprising the steps of: (a) positioning a plurality of portable transceivers on or in the vicinity of the property site wherein acoustic line of sight is maintained to at least two of the transceivers from all points of the site; (b) positioning a survey means

A method for surveying a property site comprising the steps of: (a) positioning a plurality of portable transceivers on or in the vicinity of the property site wherein acoustic line of sight is maintained to at least two of the transceivers from all points of the site; (b) positioning a survey means on the property site within acoustic line of sight of at least two transceivers; (c) transmitting an ultrasonic pulse from the survey means; (d) receiving the ultrasonic pulse at each of the at least two transceivers; (e) determining time differences which are elapsed times between transmitting the ultrasonic pulse from the survey means and receiving the ultrasonic pulse at each of the at least two transceivers; (f) determining a relative location of the survey means based on the time difference between transmitting the ultrasonic pulse from the survey means and receiving the ultrasonic pulse at each of the at least two transceivers and the speed of sound; (g) recording the relative location of the survey means; (h) moving the survey means to a different location on the site; and (i) repeating steps (b) through (h) until the survey of the site is complete.