Abstract Means for eliminating interference between objects spaced along an electric line and arranged for measuring the distance between certain ones thereof. An apparatus involving spaced objects arranged in a row, as on a track, wherein each object has a transmitting device for injecting signals into a damped line, and has also a receiver for receiving a signal created and induced in said line from a transmitter of an object ahead. The attenuation of said signal is proportional to the distance between said objects and thus a measure of said distance. Furthermore each object is provided with a complex impedance coupled to said line between the receiver and the transmitter of the object. Such complex impedance effects a reflection point in said line between the receiver and the transmitter of the object and causes the signal of said transmitter flowing in the line in the direction of said receiver to be substantially smaller in amplitude than the signal flowing from the point of said transmitter in the direction of the next following object.
In an arrangement for measuring the distance between two successive track-carried objects, each being equipped with transmitters and receivers and transmitting an electrical signal of a defined magnitude, said signal being transmitted by a transmitter of the forward object to a receiver of the next following object, said receiver having a defined sensitivity, said transmitters and receivers being coupled through a damped medium in the form of an electrically conductive line having a defined attenuation characteristic, the improvement comprising complex impedance means mounted on each object coupled with said line to place a passive reflection point for electrical signals on said line, said complex impedance means being coupled with said line between the coupling of said transmitter on each object with said line and the coupling of said receiver on each object with said line.
Claim 2
Dependent Claim
135 words
In an arrangement for measuring the distance between two successive track-carried objects, each being equipped with transmitters and receivers and transmitting an electrical signal of a defined magnitude, said signal being transmitted by a transmitter of the forward object to a receiver of the next following object, said receiver having a defined sensitivity, said transmitters and receivers being coupled through a damped medium in the form of an electrically conductive line having a defined attenuation characteristic, the improvement comprising complex impedance means mounted on each object coupled with said line to place a passive reflection point for electrical signals on said line, said complex impedance means being coupled with said line between the coupling of said transmitter on each object with said line and the coupling of said receiver on each object with said line.
Claim 3
Dependent Claim
41 words
The improved arrangement according to claim 1, wherein for each object between said transmitter and said receiver, a compensating transmitter is coupled with said line, said complex impedance means being coupled to said line between said transmitter and said compensating transmitter.
Claim 4
Dependent Claim
23 words
The improved arrangement according to claim 1, wherein said coupling of said complex impedance means with said line is provided near said transmitter.