SU1088944A1 - Symbol decoder of printing apparatus - Google Patents

Abstract

D. DESIGNER OF PRINTING DEVICE SIGNS, containing a petal type carrier, a sensor unit, an electrical signal generator unit and a control unit, characterized in that, in order to improve print quality, it has a unit, pulse shapers, a diode unit, a sensor unit consisting of inductive sensors The sensitive elements of which are located on the petals of the literate carrier and are made in the form of metallized, bath pins attached to the edges of the petals of the litter carrier, while the outputs of the sensor unit through The electrically generated signal generator unit and the diode unit are connected to the inputs of the pulse shaper unit, the first and second outputs of which are connected to the information inputs of the control unit, the setup input of which is connected to the third output of the pulse shaper unit. 2. The decoder according to claim 1, that is, with the fact that the inductive sensors of the sensor unit are made in the form of ferrite rings with a slot parallel to the 3 axis of the ring, and perpendicular to this slot in the case of ferrite rings cuts with pitch and thickness of protrusions of parts corresponding to the size of sensitive elements, the number of which is equal to the number of cuts in the rings.

Description

The invention relates to printers decoders and can be used in printers. The character decoder of the printing device is known; the file contains a literary carrier, a sensor unit, an electrical signal generator unit, and a control unit ij. A disadvantage of the known device is the poor print quality. The purpose of the invention is to improve the quality of printing. The goal is achieved by the fact that the character decoder of a printing device containing a petal type carrier, a sensor unit, an electric signal generator unit and a control unit has a pulse driver unit, a diode unit, a sensor unit consisting of inductive sensors, sensitive elements of which are located on the letters of the carrier. and are made in the form of metallized pins attached to the edges of the petals of the carrier, while the outputs of the sensor block through sequentially connected gene blocks tors electrical signals and power diodes are coupled to the inputs of the pulse unit, the first and second outputs are connected to data inputs of the control unit, setting input connected to the third output of the pulse shaping unit. In addition, the inductive sensors of the sensor unit are made in the form of ferrite rings with a slot parallel to the ring axis, and perpendicular to this slot in the case of ferrite rings, additional slots are made with pitch and thickness of the jutting parts corresponding to the dimensions of sensitive elements, the number of which is equal to cuts in the rings. FIG. 1 shows a block diagram of a decoder; in fig. 2 shows the layout of the sensors; in fig. 3 - / schemes of the generator of electrical signals; on .. 4 - structures of sensitive elements of the sensor; in fig. 5, the electrical circuit of the control unit The decoder consists of a lobe 1 with rays 2, at the ends of which the signs of 3 sensitive elements 4 are located, arranged with a pitch equal to 4, where is the sign setting accuracy. Sensitive elements 4 have a width equal to 2-. Inductive sensors 5-7 interact with sensing elements 4. The electronic part consists of electric oscillators 8-10 connected to inductive sensors 5-7, as well as a control part determining the direction of rotation of the lobe and encoding pulse information received from sensors in digital code. The device also has pulse shapers 11-13, signal shaping circuits 14-17, circuits AND 18-25, and 27, counter 28, inverters 29, and diodes 31-33. The sensor unit has sensors 5-7. The block generator of electrical signals consists of generators 8-10. The pulse shaper unit has pulse shapers 11-13. The diode block contains diodes 31-33. The device control unit 34 has signal shaping circuits 14-17, AND circuits 18-25, cxeNbi OR 26 and 27, counter 28, inverters 29 and 30, while the outputs of the sensor unit through the serially connected electrical signal generator unit and the diode unit are connected to inputs of the pulse shaper unit, the first and second inputs of which are connected to the information inputs of the control unit, the installation input of which is connected to the third output of the pulse shaper unit, and the inductive sensors of the sensor unit are made in the form of ferrite rings with a pair ring axis-parallel slot, wherein this slot perpendicularly in the housing rings are made of ferrite additional slot pitch and the thickness of protruding portions corresponding to the sizes of sensors, whose number equals the number of slits in rings. . I After switching on, the device operates in the following manner. When the petal is rotated, the inductive sensors 5-7 interact with the sensitive elements 4 (Fig. 2). The spatial arrangement of sensors 5 and 6 with elements 4 is shown in FIG. 2. At the same time, due to the larger diameter of the petal, tolerances on the accuracy of manufacturing the sensor elements (sensing elements 4) are reduced. For example, with a petal diameter of 8 cm and a sensor accuracy of 20, and its production accuracy will be 5 mm. Sensors 5-7 are included in the resonant circuits one type of master oscillators 8-10. The generator circuit is shown in FIG. 3, Sensors 5-7 are made of ferrite cores and have a high quality factor. When the metallized sensing elements 4 are introduced into the gaps of the cores, the Q-factor of the sensors sharply decreases and the oscillations of the generators 8-10 fail. Sensors 5-7 must interact at least with no less than four elements 4 (provided that. On each sign four elements 4 are located). This is due to the fact that the tab consists of rays 2, which must be separated from each other in order to be able to bend them during printing. As a result, at a small distance between elements 4 and at a permissible distance between signs 3 in the joints of signs 3, one or more sensitive element 4 can be sent. In order not to lose information during rotation of the lobes 1 through inductive sensors, interacts with the reader m (or more, if more than one sensitive element drops out at the sign joints) with sensitive plugs 4. At the same time, the oscillator works so that, when in the core of the sensors 5 and 6 n it is open with elements 4, even three ora, in the generators still doing disruption of oscillations. The widths of the cores of sensors 5 and 6, interacting with sensitive elements 4, are 2, and the cores are arranged in such a way that, from the left, the sensor 4’s core advances by half the width 4 of the sensor 4 and then the core sensor 6, and at the approach to the right, the sensor core .6 first overlaps, and then sensor 5 core only (Fig. 2) With this arrangement of sensors 5 and 6, depending on the direction of rotation of the lobe, the signals coming from the generators 8 and 9 are spaced outin time, which allows the logical; digital control unit to determine the direction of rotation of the disk. To determine the initial position, there is a reference sensor 7, which also works like sensors 5 and 6. It differs from them only by the radial offset of sensor 7 and the elongation of one sensitive element 4 corresponding to the zero position (Fig. 4), with this sensor 7 interacts with only one sensitive element 4 (Fig. 4). The circuit of the control unit E4 operates in the following way. From the amplitude detectors, information from the generators 8-10 in the form of pulses is fed to the formers 1113 pulses. The pulses from the formers 11 and 12 are shifted in time, and their sequence depends on the direction of rotation of the disk. These pulses arrive at the wa circuit of the formers and pulse distributors (Fig. 5). At the same time, the formation circuits 14–17 form the impulses to the corresponding logical transition (either from 1 to O or from O to 1). Circuits I1825, OR 26 and 27 and inverters 29 and 30. are a decoder that distributes the pulses to the reversing input of the counter 28. Thus, the use of a character decoder made in conjunction with the lobe will improve the accuracy of the sign installation, reduce the inertia moment on the motor shaft. The economic effect of the application of the present invention is to reduce the complexity of the manufacture of the character decoder, the technical effect is to increase the accuracy of the device and reduce the moment of inertia brought to the shaft of the executive engine. Use of the invention improves print quality.

Code

Fik.1

FS4

P1

Thebes. 3

fPU8. 4 Hibs & iUfffr Thebes, 5 DGDmmu 13

Claims (2)

I. PRINTING DEVICE SIGNS DECODER, containing a petal letter carrier, a sensor unit, an electric signal generator unit and a control unit, characterized in that, in order to improve print quality, it has a pulse former, a diode unit, and the sensor unit consists of inductive sensors, sensitive the elements of which are located on the petals of the letter carrier and are made in the form of metallized pins mounted on the edges of the petals of the letter carrier, while the outputs of the sensor block through unity block generator of electrical signals and power diodes svyazayy g input unit pulse generators, the first and second outputs are connected to data inputs of a control unit adjusting the input of which is connected to the third output pulse shaping block. 2. Decoder according to π. 1, since the inductive sensors of the sensor unit are made in the form of ferrite rings with a slot parallel to the axis of the ring, and additional cuts are made perpendicular to this slot in the case of ferrite rings with a pitch and a thickness of the protruding parts corresponding to the size of the sensitive elements, the number of which is equal to the number of slots in the rings. SU in 1088944