1991-09-25
1993-12-28
Dzierzynski, Paul M.
Registers
Records
235449, 340680, G08B 1314
Patent
active
052742202
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to data carriers provided for control of tools for machine tools, parts and products in a factory, or an article identification system such as a physical distribution system.
BACKGROUND ART
Conventionally, in order to mechanize control of tools for machine tools or identification and so on of parts and products at an assembly carriage line in a factory, there is a need for a system for identifying and controlling various kinds of articles such as tools, parts, products and so on. There has been proposed an article identification system, as disclosed in Japanese Patent Laying-Open No. 1-151832, in which a data carrier having a memory is provided for an article to be identified, necessary information is externally written into the memory of data carrier by data transmission, and the information is read out as required.
In such a data carrier, as shown in FIG. 1, a resonance circuit 201 is connected to a coil for reception, a signal obtained at the resonance circuit is waveform shaped in a waveform shaping circuit 202, data is written into a memory 204 through a memory control portion 203 including a gate array, a CPU and so on, or data is read out based on a command given and is supplied by absorbing the vibration of resonance circuit 201 by a vibration absorbing circuit 205.
However, such a conventional data carrier was so structured that it could have a memory of a relatively large storage capacity. Accordingly, the memory control portion formed of the gate array, the CPU and so on became complicated and a memory having a large storage capacity was used, so that it had a disadvantage that the price thereof could not be reduced. Therefore, disadvantageously, it was not suitable for a case where such a memory of a large storage capacity is not required and a small storage capacity, for example, a storage capacity of a memory of several bits to several tens of bits was large enough.
DISCLOSURE OF THE INVENTION
The present invention is made in view of such a problem of a conventional data carrier, and an object thereof is to make it possible to hold a small amount of data with a highly simplified structure suitable for a reduced storage capacity and to write and read data using a conventional write/read control unit as it is.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram illustrating one example of a conventional data carrier.
FIG. 2 is a block diagram illustrating a structure of a data carrier in accordance with a first embodiment of the present invention.
FIG. 3 is a waveform diagram showing a waveform of each portion at the time of writing data.
FIG. 4 is a waveform diagram showing a waveform of each portion at the time of reading data.
FIGS. 5a and 5b are diagrams illustrating one example of data containing identification codes to be written into a shift register and an example of patterns of the identification codes.
FIG. 6 is a circuit diagram illustrating a read out circuit of data containing the identification codes provided on the side of a write/read control unit.
FIG. 7 is a block diagram illustrating a structure of a data carrier in accordance with a second embodiment of the present invention.
FIG. 8 is a circuit diagram illustrating a read out circuit of data containing identification codes used on the side of the write/read control unit.
FIG. 9 is a block diagram illustrating a structure of a data carrier in accordance with a third embodiment of the present invention.
FIGS. 10a and 10b are diagrams of the appearance of a data carrier.
FIG. 11 is a waveform diagram showing a waveform of each portion at the time of reading data.
FIG. 12 is a block diagram illustrating a structure of a data carrier in accordance with a fourth embodiment of the present invention.
FIG. 13 is a waveform diagram showing a waveform of each portion in the fourth embodiment.
FIG. 14 is a block diagram illustrating a structure of a data carrier in accordance with a fifth embodiment of the present invention.
FIG. 15 is a waveform diagram showing a waveform
REFERENCES:
patent: 4924210 (1990-05-01), Matsui et al.
Fukuoka Shinichiro
Kanda Yoshimi
Miyake Ryoichi
Dzierzynski Paul M.
Omron Corporation
Wong Don
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