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Device-for-transmitting-of-binary-data-between-a-mobile-data-carrier-and-a-stationary-station

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***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST*** *** NO IMAGES AVAILABLE***

Description:...

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Device for transmitting of binary data between a mobile data carrier and a stationary station

Details

Inventors: Fauser, Edwin; List, Hans; Schirmer, Gunter;
Assignee: Robert Bosch GmbH (Stuttgart, DE)
Primary Examiner: Myracle; Jerry M.
Assistant Examiner:
Attorney, Agent or Firm: Striker; Michael J.

A device for transmitting of binary data between a mobile data carrier (10) and a stationary station (11) is provided with a first resonance circuit (13) in the stationary station (11), whereby a switchable field effect transistor (25) is parallel switched to its condenser (17) by means of a switching pulse sequence, a second resonance circuit (12) in the data carrier (10) which is at least conductively coupled for a short time with the first resonance circuit (13). For the purpose of enlarging the inductively to be bridged distances between the resonance circuits (12,13) of data carrier (10) and stationary station (11) without impairing the operating safety during the data transmission the resonance circuit (13) in the stationary station (11) is designed in such a manner that its resonance frequency is about equal to the switching pulse sequence. The data transmission from the data carrier (10) to the stationary station (11) is performed by amplitude demodulation in the data carrier (10) and by amplitude demodulation in the stationary station (11). The data transmission from the stationary station (11) to the data carrier (10) is performed by frequency demodulation, whereby the frequency ratio is adjusted to 2:1.

DETAILED DESCRIPTION We claim: 1.
A device for transmitting binary data between a mobile data carrier (10) and a stationary station (11), the data carrier (10) having a passing movement past the stationary station (11), in particular between a workpiece support and one of a finishing station and a control station on one of transfer conveyors and assembly conveyors, the device comprising: means for transmitting binary data between a mobile data carrier (10) and a stationary station (11) and including a first resonance circuit (13) associable with the stationary station and having a capacitor (17), a first coil (16) and a first resonance frequency, and a second resonance circuit (12) associable with the data carrier and having a second coil (14) inductively coupled, at least for a short time, with said first coil (16) during a passing movement of the data carrier past the stationary station, said second resonance circuit (12) having a resonance with an amplitude when said second coil (14) is inductively coupled with said first coil (16); means for providing at least one switch pulse sequence with a frequency and including a first electronic switch (25) connected in parallel to said capacitor (17) of said first resonance circuit (13); means for influencing said resonance in dependency upon one of two binary values of data to be transmitted by the data carrier to the stationary station and including a modulation circuit (28) connected with said second resonance circuit (12); and means for recovering a binary value when transmitted and including a demodulation circuit (37) connected with said first resonance circuit (13), said first resonance circuit (13) being formed so that said first resonance frequency is about equal to said frequency of said switch pulse sequence, said influencing means being formed to modulate said amplitude of said resonance, and said recovering means being formed to recover the binary value in said first resonance circuit (13) by amplitude demodulation of said resonance

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