×

DISTANCE MEASURING METHOD AND APPARATUS FOR THE PERFORMANCE THEREOF UTILIZING TWO TR

  • US 3,725,920 A
  • Filed: 11/12/1970
  • Issued: 04/03/1973
  • Est. Priority Date: 11/24/1969
  • Status: Expired due to Term
First Claim
Patent Images

1. Method for distance measurement by means of two transmitterreceiver devices arranged at the terminal points of the path to be measured and which can be selectively switched as a main- or auxiliary station, and at which transmitter-receiver devices for the purpose of preventing ambiguous results there are carried out in succession, in accordance with a measurement program consisting of a series of different measurement frequencies, measurements by means of measuring signals of different frequencies, the measuring frequency of the auxiliary station being controlled to possess a value which is different by a certain amount from that of the main station, and wherein in the main and auxiliary station by mixing the transmitted and the received measuring signals there is produced a difference signal, with the difference signal produced at the auxiliary station being transmitted back to the main station where for the different measuring frequencies there is determined from the generated and the transmitted back difference signals by carrying out a phase measurement a partial measurement result, and from which partial measurement results there can be derived the total measurement result, the improvement comprising the steps of:

  • automatically initiating transmission back of the difference signal produced in the auxiliary station upon the appearance of a phase quiescent condition at a measuring frequency control of the auxiliary station, arrival of such transmitted back difference signal at the main station automatically triggering measurement of a corresponding partial measurement result, and upon completion of each partial measurement result automatically switching-off the measuring signal of the main station, and nonpresence of at least one difference signal at the main-and auxiliary stations bringing about continuation of the measurement program to the next successive measuring frequency and switchingin of the measuring signals.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×