SU1642487A1 - Device for printout checking - Google Patents

Abstract

The invention relates to automation and computing and can be used, for example, in devices for outputting textual or graphical information on paper. The aim of the invention is to improve the speed and accuracy of the device. The device contains a control unit, character generator, switches, a sensor unit, a memory unit, a code converter, as well as a print head unit and an information source. The device provides continuous control of the printed information and outputs control results in the form of a sequence of codes of printed characters. 2 Il.

Description

The invention relates to automation and computing and can be used, for example, in devices for outputting textual or graphical information on paper.

The aim of the invention is to improve the speed and accuracy of the device.

FIG. 1 shows a functional diagram of the device; in fig. 2 - functional block diagram.

The device comprises a control unit 1, a character generator 2, a first switch 3, a sensor block 4, a second switch 5, a memory block 6, a code converter 7, a print head block 8 and an information source 9.

The control unit 1 contains three trigger 10,11 and 12, four elements IL & 13-16, element And 17, seven drivers 18-24 pulses, a counter 25, a code converter 26 and two elements 27 and 28 of the signal delay.

The memory unit 6 consists of a group of registers 29, each of which ensures the memorization of one line of the decomposition of the image elements read by the sensors of the unit 4.

The code converter 7 consists of a group of cascade-connected permanent memory devices 30.

The device works as follows.

If it is necessary to display information, the information source 9, for example, a computer, detects the presence of a signal at the beginning of a line at its input and sends a reset signal to control unit 1, which resets the counter 25 and sets trigger one to ten. Through the OR 15 element, the output signal the trigger 10 sets the trigger 12 to one state and passes to the output the device request, in response to which the source (information 9 for K)

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The I / O signal triggers, which triggers the trigger 10 and removes the signal. Request from the output of the OR 15 element.

The information input of the character generator 2 from the computer receives the first character code, and its address inputs receive the address of the first line of the printed character from the corresponding outputs of the converter 26 of the control unit 1 code codes. The output signals of the character generator 2, corresponding to the configuration of the first row of the first character, arrive at the information inputs of the first switch 3, the address inputs of which receive the address of the first print head, therefore the information received on it is fed to the first print head.

After a time determined by the parameters of the delay element 28, the shaper 21 generates a Print pulse, with which the first print head prints the image elements of the first line of the first character. The printed image is read by the corresponding sensors of block 4 and is fed to the information inputs of the second switch 5. According to the line code supplied to the address inputs of the second switch, the specified input signals are fed to the inputs of the first group of registers 29 of the memory block 6. By the address code of the head of the unit 8, which is applied simultaneously to the first switch and to the address inputs of the memory block and the signal, the Record from the control unit 1 information from the sensor unit 4 is written into the corresponding register of the memory block 6.

The Record signal is generated by the control unit shaper 20 on the trailing edge of the Print signal. On the trailing edge of the Record, the shaper 19 generates a pulse that sets the trigger 12 to the zero state. After the transition to the zero state of the trigger 12, the counter 25 goes to the next state. At the same time, the signal from trigger 12 goes to shaper 24, a pulse from which blocks the output of converter 26 of codes for the duration of switching over counter 25. After the blocking pulse terminates, the signal from the control output of the first discharge of converter 26 of codes sets trigger 10 to one, the signal is set to , the entire cycle of printing and recording the first line of the second character is repeated and the counter code 25 is incremented by one.

This process is repeated until the end of the decomposition string, then the second decomposition string is output.

Upon completion of the output of the information of the last line of the decomposition of the last character, the reading mode of the information recorded in the memory block 6 begins. With

the second bit of the code converter 26, the trigger 11 is transferred to one state, and from its output through the element OR 15, a signal is sent to the computer. The request to the memory block 6 receives the signal Read,

0 which in parallel arrives at all control read inputs of registers 29, at the same time, the read signal through the shaper 23 and the OR 14 element is set to one trigger 12 signal.

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The address of the memory block b receives the head address code from the 26 code converter, bit 4-10.

In this case, the output of the first register 29

0, the binary code of the first line of the first character decomposition appears, at the output of the second register - the second line of the first character, at the output of the third - the third line, etc. These binary codes are fed in parallel to the persistent storage devices 30. As a result of the cascading connection of the elements 30 and the information stored in their memory, the output of the last element 39 is the printed character code in the case of its correct printing or the rejection code otherwise . This code from the output of element 30 is fed to the input of the computer and is written into its internal memory. By signal I / O, formed in

5 computer in response to a request signal, the trigger 11 is reset, the request and read signals are cleared and the trigger 12 is cleared and zeroed by elements 13 and 18. By resetting the trigger signal 12, the counter 25 is reversed to a new state.

At the same time, at the outputs 4-10 of the code converter 26, the code of the second printhead appears, which enters memory block 6, and from the output of the second bit of the converter 26 codes, trigger 11 is set to one. Further, the cycle of reading the symbol code is repeated and the code of the second symbol is fed to the input of the computer, and so on. After reading the last character

0 line turns on the rollback mode. With this signal, the SM start-up from the third bit of the code converter 26 turns on the stepping motor (not shown) and simultaneously sets the trigger

5 12. The SM start signal also arrives at a delay element 27, which is delayed by the time required for a step motor to work one step, after which the OR 12 pulse generator 18 zeroes the trigger 12,

the signal from which counter 25 enters a new state.

Rolling continues until such a state of counter 25, in which signals from its predetermined outputs switch on element 17. From its output through element OR 1 b, counter 25 is reset to the zero state, at which at the output of the fourteenth bit of code converter 26 A start line signal appears. The cycle of printing and controlling the next character line is similar.

Thus, the device provides continuous monitoring of the printed information and the output of the control results in the form of a sequence of codes of printed characters.

Claims (1)

Invention Formula A device for controlling information printing, containing a character generator, a memory unit, two switches, a sensor block, the outputs of the first switch are information outputs of the device, and information inputs are connected to the corresponding outputs of the character generator, the information inputs of the second switch are connected to the corresponding outputs of the block sensors, characterized in that. in order to improve the accuracy of the device, it contains a code converter and a control unit, the Reset input of which is the Device Reset input, the output Query is the output Device Query, the output of the Begin Line is the output of the Begin Device line, and the control input of the control block is the input I / o of the device, the outputs of the address line of the control unit are connected to the corresponding inputs of the character generator and the second switch, the outputs of the address of the print heads of the block are connected to the corresponding inputs The signals of the first switch and memory block, the output of the Print and the SM start are the corresponding device outputs, the Write and Read outputs are connected to the corresponding inputs of the memory block, the code converter outputs are the information outputs of the device, and the inputs are connected to the corresponding outputs of the memory block, The information inputs of the character generator are the information inputs of the device. 1P J L. jj 2 yoo-j T Record I read it. l  s one AI Yaz & f FS / g / Editor L. Veselovska R "r.2 Compiled by N. Mil ev Techred M. Morgeital Proofreader M.Maksimishinets