DE2223602A1 - REGISTER WITH A VARIETY OF WRITING ELECTRODES - Google Patents

Description

Recording device kit of a multi-room of writing electrode !!

Recording devices with a variety of transverse to the direction of movement of the recording medium evenly spaced a write electrode ?! are known. Depending on the size of the measured value, one electrode is activated, i.e. an electrical one Voltage applied, which leaves a trace on the recording medium. The recording medium is e.g. a chemically specially prepared paper is used. Another known method is an electrical Charge image generated or changed on the carrier and the recording by means of a development process made visible. Recording media with a layer of liquid crystals can also be used. The recording is due to the spacing of the recording electrodes and the associated erratic Change in the measured variable is not continuous and shows a step-shaped image.

The invention is based on the object of eliminating this disadvantage and with relatively little additional Effort to maintain a continuous record. In the case of a recording device with on a common carrier arranged writing electrodes this is achieved according to the invention in that the carrier by means of a Displacement drive can be displaced by a maximum distance corresponding to the mutual distance between the electrodes and the drive executes the shift according to the deviation of the measured value from the value which

VPA 9/366/1547 a, Gra / Scl

- 2 -

309848/0625

- 2 - VPA 9/366/1547 a

animal controlled electrode auge arranges Int, The Veraehiebeantritb is. eg controlled by a digital-analog UnisetEcr, which detects the low-order digits of the measured value that correspond to values that lie between the electrodes.

The invention will be explained in more detail using the purely scholarly representations of the drawing. At 1, the measured value occurs as a digital value and is then processed for the control of the electrodes. The electrode carrier 6 can be displaced transversely to the direction of movement 7 of the recording paper 5 by means of a displacement drive 4. 8 with a control element (gate), and 9 with a clock for decoding the digital value. The high-order digits, for example the digits η to m (n, m integer, η> ro) of the measured value are passed on to a decoder 2, the low-order digits m-1 to 0 to a digital-to-analog converter 3. The decoder 2 controls that recording electrode whose position corresponds to the size of the measured value represented by the points η to m. The lower digits m-1 to 0 of the measured value are converted into an analog value at the converter 3 and fed to the displacement drive 4, which displaces the carrier 6 of the measuring electrodes proportionally to the analog value, by a maximum of the distance between two electrodes. If, for example, the measured value 20.6 is present, the electrode corresponding to the value 20 is activated and the electrode carrier is shifted to higher values by 60 times the distance between two electrodes. A known electromagnetic drive or a piezoelectric drive, as indicated achematically in the figure, can be used as the displacement drive. Here, an electrical voltage corresponding to the displacement movement is applied to a bending strip 4 made of piezoelectric material. The strip assumes the position shown in dashed lines at maximum displacement.

3 claims

30984 * 8/0625 - 3-

8AD

Claims (3)

- 3 - VPA 9/366/1547 a Claims Recording device with a plurality of transversely to the direction of movement of the recording medium and evenly spaced from each other. writing electrodes controlled depending on the size of the measured value on a common carrier, characterized in that the carrier can be displaced by a maximum distance corresponding to the mutual distance of the writing electrode by means of a displacement drive and the drive executes the displacement accordingly
the deviation of the measured value from the value, which
is assigned to the activated electrode. 2. Registration device according to claim 1, characterized in that the displacement drive has a lower value Set the digital-to-analog converter capturing the measured value is activated. 3. Registration device according to claim 1 and 2, characterized in that the sliding movement by means of a
Flexural strip made of piezoelectric material is generated. 3098 4 8/0625 BATH first page