Pulse signal multiplier for providing a secondary pulse signal from a primary pulse signal of a pulse signal generator
AssigneeKnick Elektronische Messgeräte GmbH & Co. KG
InventorsJoachim Baumann, Lars Schweizer, Olaf Biese
Life of this patent
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Abstract
A pulse signal multiplier for the provision of a secondary pulse signal without retroactive effect from a primary pulse signal of a pulse signal generator, in particular for the multiplication of speed sensor signals for use in train protection systems, includes an input circuit which taps off the primary pulse signal via a shielded branch signal line, an output circuit which receives the signal transmitted via the potential barrier, and an optical signal transmission path bridging the potential barrier between the input circuit and the output circuit.
Claims17
A pulse signal multiplier for generating a secondary pulse signal from a primary pulse signal of a pulse signal generator, comprising:
- an input circuit (120, 120′) which taps off the primary pulse signal via a shielded branch signal line (190),
- wherein the input circuit (120, 120′) comprises inputs (101, 102) that receive the primary pulse signal as an input signal for further processing in the pulse signal multiplier,
- wherein the inputs (101, 102) are adapted to a signal type of the primary pulse signal,
- wherein the input circuit (120, 120′) does not change the primary pulse signal,
- wherein the input circuit (120, 120′) conditions the input signal for transmission via a galvanically isolated potential barrier, and
- wherein the input circuit (120, 120′) is provided with a dedicated electrical shield (122) to optimize common mode rejection and EMC properties;
- an output circuit (181, 181′) which receives a transmitted signal that has been transmitted via the galvanically isolated potential barrier,
- wherein the output circuit (181, 181′) conditions the transmitted signal into an output signal that simulates the primary pulse signal,
- wherein the output circuit (181, 181′) outputs the output signal at a signal output (175, 175′) corresponding to the signal type of the primary pulse signal for transmission as an apparent-primary, secondary pulse signal to a connectable control device, and
- wherein the output circuit (181, 181′) is provided with a further dedicated electrical shield (174) to optimize common mode rejection and EMC properties;
- and
- an optical signal transmission path (382) bridging the galvanically isolated potential barrier between the input circuit (120, 120′) and the output circuit (181, 181′),
- wherein the optical signal transmission path (382) is hermetically sealed against operating conditions that impair optical transmission quality,
- wherein the optical signal transmission path (382) bridges an electrical insulation distance between the dedicated electrical shield (122) of the input circuit (120, 120′) and the further dedicated electrical shield (174) of the output circuit (181, 181′), and
- wherein the optical signal transmission path (382) comprises
- an electronic signal emitter (316) arranged inside the dedicated electrical shield (122) or inside a shield having the same potential as the dedicated electrical shield (122), and
- an electronic signal receiver (350) arranged
- inside the further dedicated electrical shield (174) or inside a shield having the same electrical potential as further dedicated electrical shield (174).
Dependencies are inferred from the claim text.