DISTANCE MEASURING METHOD AND APPARATUS FOR THE PERFORMANCE THEREOF UTILIZING TWO TR
First Claim
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.
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Abstract
An apparatus and method for distance measurement by means of two transmitter-receiver devices arranged at the terminal points of the path to be measured and which can be selectively switched as a main- or auxiliary station. The invention contemplates automatically initiating transmission back of a difference signal produced at 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. Upon completion of each partial measurement result the measuring signal of the main station is automatically switched-off, and non-presence of at least one difference signal at the main- and auxilliary stations bringing about continuation of the measurement program to the next successive measuring frequency and switching-in the measuring signals.
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Citations
3 Claims
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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.
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2. An arrangement for carrying out distance measurement operations, comprising a main station and an auxiliary station, a transmitter-receiver means and a measuring frequency oscillator provided for each said station, each measuring frequency oscillator being switchable to different measuring frequencies, a measuring frequency control device provided for the measuring frequency oscillator of said auxiliary station, a phase measuring device possessing partial measurement result storage means provided for said main station for determining and forming partial measurement results, separate marker means provided at said main station for a generated difference signal and for a difference signal transmitted back by said auxiliary station and separate marker means at said auxiliary station for a generated difference signal and for a difference signal transmitted back internally via the transmitter-receiver device of said auxiliary station, said marker means having respective outputs marking the presence of difference signals trough the appearance of logic signals at their respective outputs, a phase quiescent-indicator means having output means provided at said auxiliary station, said phase quiescent indicator means being electrically coupled with said measuring frequency control device, said phase quiescent-indicator means indicating a quiescent control condition through the appearance of a logic signal at its output means, a logical AND-circuit provided at said auxiliary station, said AND-circuit having a first input coupled with an output of the marker means for the generated difference signal, a second input coupled with said output means of said phase quiescent-indicator means and an output connected with means for switching-through the transmitted back difference signal, said phase measuring device being electrically connected via a trigger input with an output of said marker means for the transmitted back difference signal and via an output, marking the termination of a measurement operation by delivering a logic signal, with switch means for switching-off the measuring signal, each station further being provided with program transmitter means, logic circuit means for coupling said program transmitter means with the outputs of the associated marker means, each said program transmitter means being coupled with its associated measuring frequency oscillator for switching the measuring frequencies, said program transmitter means at said main station additionally being coupled with said phase measuring device for range switching and control, and said program transmitter means at the auxiliary station being coupled with said frequency control device for switching the control sense thereof.
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3. An arrangement for carrying out distance measurement operations, comprising a main station and an auxiliary station, a transmitter-receiver means and a measuring frequency oscillator provided for each said station, each measuring frequency oscillator being switchable to different measuring frequencies, a measuring frequency control device provided for the measuring frequency oscillator of said auxiliary station, a phase measuring device possessing partial measurement result storage means for determining and forming partial measurement results, separate marker means provided at said main station for a generated difference signal and for a difference signal transmitted back by said auxiliary station and separate marker means at said auxiliary station for a generated difference signal and for a difference signal transmitted back internally via the transmitter-receiver device of said auxiliary station, said marker means having respective outputs marking the presence of difference signals through the appearance of logic signals at their respective outputs, a phase quiescent-indicator means having output means provided at said auxiliary station, said phase quiescent-indicator means being electrically coupled with said measuring frequency control device, said phase quiescent-indicator means indicating a quiescent control condition through the appearance of a logic signal at its output means, a logical AND-circuit provided at said auxiliary station, said AND-circuit having a first input coupled with an output of said marker means for the generated difference signal, a second input coupled with said output means of said phase quiescent-indicator means and an output connected with means for switching-through the transmitted back difference signal, said phase measuring device being electrically connected via a trigger input with an output of said marker means for the transmitted back difference signal and via an output, marking the termination of a measurement operation by delivering a logic signal, with switch means for switching-off the measuring signal, each station further being provided with program transmitter means coupled with the outputs of the associated marker means, each said program transmitter means being coupled with its associated measuring frequency oscillator for switching the measuring frequencies, and said measuring frequency oscillator at the auxiliary station being coupled with said frequency control device.
Specification