SU920689A1 - Data input device - Google Patents

Description

The invention relates to computing and is intended to enter data into a computer.

An electronic keyboard is known in which there is a sensor field using a capacitive coupling between a user's finger and a key, which is a touch sensor containing an oscillator associated with an antenna spanning each of the keys. The generator produces a variable frequency signal, determined by the magnitude of the capacitive coupling between the user's finger and one of the keys that he presses. The signal is then converted and output in encoded form at output 1.

The drawbacks of the device are the lack of control (i.e., display) of the information entered, the difficulty of user training in connection with a large number of keys.

The closest in technical essence and effect achieved to the invention is a device for inputting alphanumeric characters into a computer, containing a sign field in the form of a display with touch switches, additional functional KHonKaNm, logic block and memory block 2 located on it.

However, this device has sophisticated data set technology and output code redundancy.

The aim of the invention is to understand the reliability of the device.

The goal is achieved by the fact that the input device contains a keyboard, the outputs of which are connected to the inputs of the pulse shaper unit, the first output of which is connected to the first input of the OR element block, the output of which is connected to the first input of the first register, the output of which is connected to the input keyboard, the second input of the pulse shaper unit is connected to the first input of the OR element,

20, the third input of the pulse shaper unit is connected to the second input of the OR element and the first input of the second register, the second input of which is connected to the first output of the unit 25, and the first output to the device output. The output of the pulse generator is connected to the first input of the address counter, the first the output of which is connected to the input of the memory block, the output of the element OR is connected to the second T; One of the first registers included the first and second highlights of the comparison, the block of elements And and the third register, the first input of which is connected to the second input of the address counter, the first input of the pulse generator and the fourth output of the block of pulse shapers, the second input of the pulse generator is connected to the third input the OR element, the second output of the address counter and the first input of the AND element block, the output of which is connected to the second input of the OR element block, and the second input to the first output of the second registrar, the second output of the memory block is connected to the first input of the First Comparison Unit, the second input of which is connected to the output of the first register, and the output is connected to the first input of the second comparison unit, the second input and the first output of which is connected to the corresponding output and the second input of the third register, the third input of which is connected to the second the output of the second comparison unit and the third input of the second register. The drawing shows a block diagram of a device for entering information. The device contains a keyboard 1 consisting of sensor sensors 2 and indicators 3, a block of pulse formers 4, a block of 5 elements OR, a first register 6, a element of OR 7, a block 8 of memory, a first block 9 of comparison, a second block 10 of comparison, a second register 11, the address counter 12, the block 13 of the elements And, the third register 14, the generator 15 pulses. The device works as follows. In order to encode a character, the user dials one or another trajectory on the keyboard 1 by touching information sensors 2. The finger movement path must not correspond to the graphic style of the desired character. Each touch sensor 2 consists of a contact pad. made of, for example, a metal plate with a built-in indicator 3. As indicator 3, for example, a neon lamp, an LED, an incandescent lamp, etc. can be used to encode alphanumeric codes. oxen enough to place the keyboard 1, for example, 35 of information tional sensors 2 -vi de typesetting gender raemeryos Tew elements. In addition, 3 functional sensor sensors are used to control the device: Execute, Output, and Not true, we have a sub-keyboard, the lower border of the keyboard 1. Giving a touch to any sensor 2 causes a change in the level of the analog signal to the corresponding input of unit 4 pulse drivers, for example, consisting of amplifiers, detectors and Schmitt triggers. At the same time, at the corresponding output of the block 4 of the drivers, the voltage drop returns to the initial level if the user's finger does not touch the sensor 2. Before starting the operation, the first trigger register is used by touching the Incorrectly sensor of the sensor 1 is set to the zero state. In this case, the signal is incorrect from the second control output of the block 4 of the drivers through the element OR 7 is fed to the second control lid of the first trigger register 6. All indicators 3 of the keyboard 1 go out. The clock generator 15 is in a state of rest, i.e. there are no clock pulses at its output. To encode the next character, the user dials the appropriate trajectory, touching in any order the information sensor sensors 2 of the keyboard 1. At this, on some of the first output information bus of the block of formers 4, voltage drops will appear that are transmitted through block 5 elements OR to the first information inputs of the first trigger register 6, the number of triggers in which is equal to the number of information touch sensors of the keyboard 1. Corresponding triggers p Giustra SET are used in a single state, and flip-flop output line of Vits multidigit binary code. The trigger status of register 6 over the output bus is transmitted to keyboard 1 and is displayed by light indicators 3 combined with sensor sensors 2. On keyboard 1, a light dotted image of the typed character path appears. If the path typed on the keyboard 1 does not satisfy the user (for example, due to a mechanical error), he can reset the dialed code by touching the touch sensor. Keypad 1 is incorrect and dial again. Then the typed trajectory is analyzed, for which the user needs to touch the sensor sensor Execute. At the same time, at the fourth control output of block 4 of the worlds, the voltage drop will occur, under the action of which the clocking generator ib will start, the PED will, by the action of the same voltage drop, simultaneously set the address counter 12 to the zero state, and register 14 will be written in all bits. The generator 15 will start issuing a periodic sequence of clock pulses arriving at the first counting input of the address counter 12. On the first output bus of the address counter 12, binary information address codes stored in the passive memory block 8 will appear successively. The address codes from the output bus of the counter of address 12 affect the address inputs of the memory block 8, causing the second multi-bit binary codes to appear on its second output bus alternately. Each recorded binary code consists of two parts. The first hour (for example, the higher bits) corresponds to a feasible version of the trajectory that can be obtained by typing a certain character on the keyboard 1. It is assumed that each of the characters to be typed can be represented by several versions of the trajectories. The second part of each binary code stored in the passive memory unit 8 corresponds to the output code of a lower bit size, with each symbol (regardless of the image version) corresponding to only one version of the output code. Both parts of each binary code correspond to one row of the transcoding table of the allowed trajectories of characters. The transcoding table must be pre-recorded in the passive memory unit 8. At the same time, the first output bus of the memory block 8 receives the first part of the binary code corresponding to the permissible variant of the trajectory without the accompanying output code of a lower bit size. If, as an example, to select the alphanumeric characters of the standard seven-digit code for information exchange KOI-7, the cell width of the passive memory block 8 should be equal to 42, with the first J5 bits of each cell through the first output bus, and the second output bus is all 42 bits. During the analysis phase, at each time point determined by the clocking generator 1b, the first group of inputs of the first block 9 sets the multi-bit binary code of the next variant of the allowable trajectory for the encoded characters, and the second group of outputs - the binary code of the same size, the corresponding, actually typed on the keyboard 1 trajectory. A binary mismatch code is generated at the outputs of the first comparison block 9, which represents the number of discs in each pair of compared codes arriving at both input buses of the heavy block. The code number of the mismatch number m is determined by the ratio n, where n is the number of keyboard information sensors 1. For example, if, then the minimum allowable value is m 6. The same number m of binary bits is processed by the second comparison unit 10 and the third trigger register 14. The second The comparison unit 10 generates at its control output a single voltage value, if the binary code of the number of mismatches on the first input bus is less than the code on the second input bus. The value of the code of the number of mismatches through the first input bus of the second comparison unit 10, it is transmitted via its output bus to the second information inputs of the third trigger register 14. When there is a single voltage value on the third control input of the third trigger register 14, the mismatch number code stored in it is replaced coming through the information inputs. At the same time, the next row of the transcoding table, fed through the first output bus of Memory 8 to the second information inputs of the second trigger register 11, with an allowable (single) value of the voltage supplied to the third control input, is written to the register 11, replaced previously stored in it binary code If the second comparator block 10 generates a zero voltage at its control output, overwriting the contents of the second 11 and third 14 trigger registers does not occur. The total number of permissible paths recorded in memory block 8 can be quite large, which ensures high reliability of recognition of 1 characters typed on the keyboard. For example, if the input alphabet contains J.OO characters, each character corresponds on average to 20 allowable trajectories, about the size of the memory block 8 will be

,: uO (i 42-bit words. This achieves an acceptable recognition rate. For example, if the period of the pulses of the clock generator is set to 1 µs, then the analysis time (search for the best possible path) will not exceed 0.2 Co

At the end of the analysis phase, i.e., after filling all the bits of the address counter 12, in the second t-rigger: the register will contain the binary code from that row of the table in the table: rovayi, in the higher bits of which the best o6pia3OM yV is less than the minimum number of non-matching digits Dov) is approaching the trajectory code of the character typed by the user on the keyboard 1. At this moment, the counter of address 12 generates a signal of the account count arriving at the second stopping input of the generator 15, and also (via the third input of the element OR 7) at the second mouth ovnoch The first input of the first trigger register b resets its triggers to the zero state, and the first enable input of the AND 13 block of cells. Older n bits - from the second output bus of the second trigger register ll via the block of AND 13 pulses to the second group of inputs of the block of OR blocks 5, and from the outputs of the latter are overwritten into the first trigger register b, the state of which is indicated by the indicators 3 of the keyboard 1.

The user will see the image of that variant of the trajectory, which turned out to be the closest to the keyboard he typed. If the received variant corresponds to the image of the symbol that the user wanted to encode, then by touching the sensor sensor. It will initiate a voltage drop at the third control output of the driver unit 4. This voltage drop serves as the enabling signal for the first control input of the second trigger register 11 to output the lower bits of its contents through the first output bus. The code on the first output bus of the trigger register 11 is the resulting character code typed by the user. The bit of this code (in the case of KOI-7 is seven bits) is several times (in the example considered, five times) less than the size of the source code entering the first trigger register b, i.e. redundancy is achieved when encoding characters.

At the moment of outputting the result code from the second trigger register 11, the image of the reference trajectory of the character on the keyboard 1 goes out

since the voltage from the third control output of the block 4 of the formers passes through the second input of the element OR 7 and acts on the second installation input of the first trigger register 6 ,. resetting all its triggers to the zero state. If the found variant of the permissible trajectory displayed on the keyboard 1 at the end of the analysis phase does not correspond to the user's intentions, he may reject it at ™

Knockout to touch sensor

right and select the trajectory of the desired character again. Admission is also permitted. corrections to display

the trajectory of touching the required sensor sensor - regardless of whether it is typed manually, or received automatic Heskey at the end of the analysis phase. After amendment.

The trajectory is again subjected to an attack, for which the user touches the Execute sensor.

To encode several identical characters following each other.

other, it’s enough to type 1 appropriate trajectory on the keyboard only once. If the result of the trajectory analysis is satisfactory, the resulting character code is output the required number of times to the Output sensor. ,

The device has advanced functionality, so

As by replacing block 8, it is possible to promptly replace the input alphabet C of mvols and the corresponding output codes. Due to the emptiness and reliability of the interpreter-ae ffiIs th-nsorny remote can be used

as a mass device, binary data encoding for input into a computer, It can be used in production recorders, or as a prefix to a telephone for

providing communication with computers in information and reference systems of wide application and in training systems.

Claims (2)

1. For France No. 2220832, cl. G About F 3/02, publ. 1974. 2. Forward Germany No. 2701115, cl. G About F 3/02, publ. 1979 (Prototype).