DE9408798U1 - Line recorder - Google Patents

Description

Mannesmann fleet company

Mannesmannufer 2 31 165

40213 Dusseldorf

Line recorder

The invention relates to a line recorder with a predetermined number of continuous writing systems for recording closed lines and a discontinuous writing system for recording alphanumeric characters on a recording medium for visualizing process variables.

A line recorder, Hartmann 6, Braun list sheet 10/42-4.10, is known, which alternatively has n continuous writing systems for n measuring channels in combination with a direct writing printing system operating according to the serial dot matrix method or n+1 continuous writing systems for n+1 measuring channels. The writing systems and the printing system are each implemented in mechanically similar modules, which are housed interchangeably in slots in the line recorder. To illustrate the alternative variants, a writing system is replaced by the printing system or vice versa. Each writing system is assigned means for processing measured values. A character generator is assigned to the printing system.

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The invention is based on the task of further developing a line recorder of the generic type in such a way that, without the need for additional mechanical components, both the measured values of nH measuring channels and alphanumeric characters can be recorded.

According to the invention, this problem is solved with the features of claim 1. The invention is explained in more detail below using a flow example.

For this purpose, the basic structure of a line recorder is shown in Fig. 1. Starting from η measuring channels, η measurement inputs 11 to 1 and η measurement processing means 21 to 2n are provided, each of which is followed by one of η continuous writing systems 41 to 4n. During the intended use of the line recorder, the writing elements of the continuous writing systems 41 to 4n are in constant contact with a recording medium that is continuously or step by step moved past the recording elements. The recording medium is guided perpendicular to the direction of movement of the recording elements.

In addition, a discontinuous writing system 50 is provided, which can be alternately connected to a character generator 30 or to another measurement value processing means 2n+i via an upstream multiplexer 31. Another measurement value input 1n+1 is assigned to the other measurement value processing means 2n+1.

During the intended use of the line recorder, two different operating modes can be assigned to the discontinuous writing system 50 depending on the switching state of the multiplexer 31. In the first operating mode for (recording alphanumeric characters), the

discontinuous writing system 50 is connected to a character generator 30, and the writing element is actuated at certain points, i.e. brought into contact with the recording medium and then lifted off the recording medium again. The alphanumeric characters to be recorded are completed step by step, raster point by raster point, within the framework of a predetermined dot matrix. In the second operating mode for recording measured values in the form of a graphic line, the discontinuous writing system 50 is connected to the further measured value processing means 2n+1. During the second operating mode of the discontinuous writing system 50, the measured values are displayed raster point by raster point on the recording medium.

Advantageously, in this way, both alphanumeric characters and graphical representations of measured value progressions over time can be recorded on a recording medium using a single writing system 50 within a line recorder.

In a further development of such a line recorder, it is intended to digitize incoming measured values and to combine the means for processing measured values 11 to 1n+1 of all measuring channels as well as the character generator 30 and the multiplexer 31 in a central processing unit with a microcomputer. In a line recorder designed in this way, each of the writing systems 41 to 50 has a digitally addressable stepper motor with which the associated writing element can be moved across the width of the drawing carrier.

List of reference symbols

11 to 1n, 1n+1 measured value inputs

21 b15 2n, 2n + 1 MeQ value processing equipment

30 character generator

31 Multiplexers

41 to 4n continuous writing systems 50 discontinuous writing system

Claims (1)

Claim for protection Line recorder with n continuous recording systems, each of which is assigned a measured value processing device, for recording closed lines and at least one discontinuous recording system, to which a character generator is assigned, for recording alphanumeric characters on a recording medium, characterized in that that the discontinuous writing system C503 is assigned a measurement value processing device (2n+D) in parallel to the character generator (30) and that a multiplexer (31) for alternately connecting the discontinuous writing system (C50) to the character generator (30) and to the measured value processing device (C2n+1) is connected upstream of the discontinuous writing system (50).