Process and device for determining the condition of machines wit

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Details

364550, 36447437, 36455102, 36447417, 33503, 33553, 33554, 318578, 318602, 235376, 235451, 73 379, 73660, 73661, G06G 778, G01B 5004

Patent

active

056919042

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION



Field of the Invention

The invention concerns a method for determining a condition of a machine at several predetermined measuring sites, and a device suitable for carrying out this method.
A method and a device of this kind are disclosed by DE 3523289 C 2. According to this state of the art, in order to form the characteristic data of the particular measuring sites, during or after mounting the measuring head on the mounting piece, optical, magnetic or mechanical encoding elements on the mounting piece are scanned in sequence by means of a scanning device provided in the measuring head by moving the scanning device past the encoding elements. In a familiar embodiment, this occurs by making use of the approach movement of the measuring head when placed on the mounting piece, and in other familiar embodiments it is accomplished in that the scanning device, after the measuring head is firmly placed on the mounting piece, is moved by means of a motor drive built into the measuring head. In the first case, special care is required on the part of the attendant, and in the latter case the drive causes considerable structural expense and requires a relatively large measuring head. In either case, only a relatively small number of the different maximum possible encoding for the measuring sites can be accomplished with reasonable structural expense, using a measuring head that is still easy to handle.


SUMMARY OF THE INVENTION

The purpose of the invention is to create a method according to the general concept of patent claim 1, which makes it possible to quickly and reliably identify and interrogate a rather large number. of measuring sites, without requiring special care on the part of the person handling the measuring head, and to do so with structurally simple equipment.
This purpose is accomplished by defining several encoding elements, with each encoding element having a plurality of working conditions, and each encoding element defined in one of the working conditions. Engaging several contact units with several encoding elements, so that each contact unit reflects the working condition of each encoding element. Generating an electric signal for each contact unit, the electric signals being indicative of the working condition of the encoding elements. Identifying a machine based on the electric signals representative of the working conditions of the encoding elements.
The invention is preferably embodied in an apparatus producing signals identifying a machine. The apparatus includes a mounting piece attached to the machine. Several encoding elements are attached to the mounting piece and arranged in a fixed special pattern, with each encoding element having several working conditions, and with the encoding elements collectively acting as an identification of the machine. A head assembly can be brought into engagement with the mounting piece. Several contact units are attached to the head assembly, with each contact unit corresponding to one encoding element. A circuit carried by the head assembly generates several electric signals which are indicative of the working conditions of encoding elements. A circuit for receiving the electric signals and a circuit for identifying a machine based on the electric signals representative of the working conditions of the encoding elements are also provided.
Subsidiary claims deal with preferred configurations of the method. The invention also a creates a device to carry out the method that is especially advantageous in respect of operating mode, operating safety, and structural expense.
Subsidiary claims also concern preferred embodiments of the device.
A preferred modification of the device makes it possible to involve, in the monitoring process according to the invented method and using the invented device, even those measuring sites which are in accessible for any reason, e.g., because of construction.
Features allow the user of the invented device to individually organize the encoding of the individual measuring sites in very simple f

REFERENCES:
patent: 4074624 (1978-02-01), Biornstad et al.
patent: 4283669 (1981-08-01), Jacoby
patent: 4490914 (1985-01-01), Spies
patent: 4631404 (1986-12-01), Burkhardt et al.
patent: 4651291 (1987-03-01), Nishimura
patent: 4719703 (1988-01-01), Ross et al.
patent: 4800512 (1989-01-01), Busch
patent: 5097119 (1992-03-01), Breitmeir
patent: 5152166 (1992-10-01), Brock et al.
patent: 5189806 (1993-03-01), McMurtry et al.

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