Pulse generator
Assignee4K - International A/S
InventorMogens Bredal Boysen
Life of this patent
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Abstract
A pulse generator for measuring the rotational angle of a shaft has a driven member which is connected to the shaft and is thus movable by the latter and which includes an endless track carrying a plurality of encoded periodic wave signals. A sensor head continuously senses the signal intensity at successive locations along the track as the driven member is moved by the shaft. The sensor head generates an output voltage which characterizes the encoded signals and which is applied to a trigger circuit. The latter generates a signal pulse each time the voltage exceeds a predetermined threshold value.
Claims8
A pulse generator for measuring the rotational angle of a rotatably supported shaft member comprising:
- (a) a driven member including a magnetizable endless track forming an integral, direct surface portion of said driven member;
- (b) recorded signal means carried on said endless track;
- said recorded signal means being formed of a plurality of recorded sinusoidal signals distributed along said endless track;
- said sinusoidal signals being constituted by different states of magnetization of the different locations on said endless track;
- (c) means connecting said driven member to said shaft member for moving said driven member by said shaft member to an extent proportional to the rotational angle of said shaft member;
- (d) means for continuously scanning successive locations of said endless track for generating a signal as a function of the flux of the magnetic field generated by the different states of magnetization of successive points on said endless track;
- (e) signal processing means for continuously and successively sensing the generated signal for forming a voltage signal having a course corresponding to said generated signal and for emitting a signal pulse each time said voltage signal exceeds a threshold value;
- and
- (f) counter means for counting said signal pulses.
A pulse generator for measuring the rotational angle of a rotatably supported shaft member comprising:
- (a) a driven member including an endless track made of a light-transparent material;
- (b) recorded signal means carried on said endless track;
- said recorded signal means being formed of a plurality of recorded sinusoidal signals distributed along said endless track;
- said sinusoidal signals being constituted by differently darkened locations on said endless track;
- (c) means connecting said driven member to said shaft member for moving said driven member by said shaft member to an extent proportional to the rotational angle of said shaft member;
- (d) means for continuously scanning successive locations of said endless track for generating a signal represented by said recorded sinusoidal signals;
- said means for continuously scanning including a light source adjacent one face of said endless track to sense the light emitted by said light source and modulated by said sinusoidal signals on said endless track;
- (e) signal processing means for continuously and successively sensing the generated signal for forming a voltage signal having a course corresponding to said generated signal and for emitting a signal pulse each time said voltage signal exceeds a threshold value;
- and
- (f) counter means for counting said signal pulses.
Dependencies are inferred from the claim text.