SU1200274A2 - Information input device - Google Patents

Abstract

1. DEVICE FOR DETAILS OF INFORMATION on author.St. No. 962893f is characterized in that, in order to increase the noise immunity, the first and second elements are NOT included, the first and second elements are OR-NOT, an integrating element, an OR element, and the inputs of the first and second elements are NOT connected to the first and third outputs respectively control, the outputs of the first and second elements are NOT connected respectively to one input of the first and second elements OR NOT, the other inputs of which are connected respectively to the outputs of the first and second counters, the outputs of elements OR NOT connected to input The signals of the OR element, the output of which through the integration element is connected to the first auxiliary input of the control unit, the second and third auxiliary inputs of which are the corresponding control inputs of the device, the fifth output of the control unit is the third output of the device. /// 2, Device pop, 1, otli-. So that the control unit contains a pulse generator, first, second, third, and fourth triggers, first, second, third, fourth, fifth, sixth, seventh, and eighth elements AND the first, second, third, fourth, and fifth elements OR, the first and second pulse formers, the shift register, the differentiating element, the element NOT and the element NAND, the output of the pulse generator connected to the counting input of the first trigger and the first inputs of the first and second § elements And the non-inverting output (L of the first trigger connected to the second th input of the first element And, the output of which is connected to the first input of the third element And, inverting the output of the first trigger is connected to the second input of the second element And whose output is connected to the first input of the first element OR, the first input of the fourth element And and the first inputs of the fifth and sixth And elements, the second input of the fourth element And is the input of the control unit, the output is connected to the synchronous input of the shift register, the first inputs of the second and third elements OR are the second additional input of the control unit 0 second input of the second OR gate and the set input to latch 1 of the second are third additional input of the control unit, non-inverting output of the second flip-flop coupled to a second input of the third AND gate, ainventirukntsy output - to a second input

Description

the first OR element, the first input of the fifth OR element is the fourth input of the control unit, the second input of the fifth OR element is connected to the output of the second OR element, the output of the fifth OR element is connected to the input of the first pulse shaper, the output of which is connected to the setup input of the shift register the first output of the shift register is connected to the input of the differentiating element and the first input of the fourth element OR, the second input of which is connected to the second output of the shift register, the third output of the shift register is connected to the second The input of the sixth element AND and the input of the second pulse generator, the output of which is connected to the second input of the third element OR, the output of which is connected to the installation input O of the second trigger, the output of the differentiating element is the second output of the unit and connected to the installation inputs O of the third and fourth flip-flops, the output of the fourth element OR is connected to the first input of the NAND element and the second input of the fifth AND element, the output of which is connected to the installation input to 1 of the third trigger and the first input of the seventh. element And, the output of which is the third output of the block, the output of the sixth element And is connected to the input of the fourth trigger set at t and the first input of the eighth element And, the output of which is the second output of the block, the output of the third trigger And connected to the second input of the seventh element the fourth trigger is connected to the second input of the eighth element AND, the output of the third element AND is the fourth output of the block, the output of the first element OR is the second output of the block, and the output of the second pulse generator is the fifth output m unit, an output of the third AND element is connected to the input of NOT circuit whose output is connected to the second input of AND-NO element whose output is the first output unit.

The invention relates to supervisory techniques and is intended to enter information.

The purpose of the invention is to increase the noise immunity of the device,

Figure 1 shows the functional diagram of the device for inputting information; Fig. 2 is a functional block diagram of the control unit; FIGS. 3 and 4 are examples of the technical implementation of sensory perceptions; in FIG. 3, time diagrams of the device operation (figures correspond to tires and elements for which time dependencies are shown).

The device contains groups of sensor keys 1, switches 2, elements OF, control block 4, first counter 5, second counter 6, first 7 and second 8 registers, group of decoders 9, decoder 10, first 11 and second 12 elements NOT, first 13 and the second 14 elements OR-N element OR 15, the integrating element 16, the inputs 17 and 18 and the output 19 of the device.

The control unit 4 (FIG. 2) contains a pulse generator 20, a first trigger 21, first to third elements AND 22-24, first to third elements OR 25-27, second trigger 28, fourth element AND 29, fifth element OR 30, the first pulse shaper 31, the shift register 32, the differentiating element 33, the fourth element OR 34, the second pulse shaper 35, the fifth 36 and sixth 37 elements AND, the third 38 and fourth 39 triggers, the seventh 40 and eighth 41 elements And, elements NOT 42 and the element IS-NOT 43, inputs 4447 of the control unit, outputs 48-54, outputs 55-57 of the shift register 32.

The touch key (FIG. 3) contains a semiconductor diode 58, a capacitor 59, a threshold element 60 with a large input resistance, for example, a SW key, a resistor 61, inputs 62-64 of the touch key, output 65 of the touch key; another semiconductor diode 66, another capacitor 67, another threshold element 68 with large input spins, another register 69, inputs 70 and 71, and output 74 of another touch key.

Another variant of the sensor key (Fig. 4) differs from the first key by an additional input 71, to which an additional bias voltage U is applied,

The device works as follows.

The start signal arriving at input 17 and input 45 through the elements OR 26 and 30 is fed to the input of the imager 31 pulses. On the leading edge of the start signal, a pulse with a short duration is generated at the output of the pulse shaper 31, which is fed to the setup input of the shift register 32. Regardless of the signals at the other input, a logical unit appears at output 55, and logical zeros at outputs 56 and 57. This can be achieved by connecting the output 55 to the inverse output of the first trigger, which is part of the 32 shift register, or giving a signal to set it to its original state on another input, compared to other triggers that are part of the 32 shift register. The other input of the shift register 32 is its clock (shift) input, and the triggering occurs on the falling edge of the input pulses,

The information input for the input of sequential information (not shown in FIG. 2) is supplied with a constant logical zero level, so after the interaction of each input clock signal at the output 55 there will be a logical zero level. The Start signal, via the 27 27th element, also enters the trigger input 28 and sets (or confirms) it to the zero state. The zero level at the forward output of the trigger 28 prohibits the passage of pulses through the AND 24 element and sets a zero potential at its output, and the positive level at the inverse output of the trigger 28, although it prohibits the passage of pulses through the OR element 25, sets its

output positive potential (logical unit),

The trigger 21 operates in the counting mode, t, e, each pulse from the output of the generator 20 changes the state of the trigger 21 to the opposite. Positive potentials from the direct and inverse outputs of flip-flop 21 give alternate resolution to the passage of signals through elements 22 and 23, respectively. Therefore, at the outputs of elements 22 and 23, non-intersecting sequences of pulses are formed, the duration of which

5 is equal to the duration of the original (input) signals.

The high level from the first output (output 55) of the shift register 32 through the element OR 34 is fed to the first input of the element AND NOT 43 and

0 input element And 36, allowing the passage of pulses from the output element And 23 through the element And 36 and then through the element And 40 to the output 52, provided that the trigger 38 is 5 s in one state. If trigger 38 is in the zero state, then the first pulse from the output of the AND 36 element arriving at the input

Q flip-flop 38 with its falling edge, will translate flip-flop 38 into one state, and the remaining pulses will only confirm this state. As triggers 38 and 39 you can use asynchronous 1K-trigger 5 ger, then the input connected to the output of the And 36 element and 37, will be 1-input, and the other input can be both K-input and R-input, t, e, static. The remaining unused inputs (if available) are given neutral signals, for example, a logical unit. By neutral level, we mean the level of a signal that does not change the state of a trigger or other element. The zero potential at the output 57 will prohibit the passage of pulses through the element And 37 to the input of the element And 41 and further to the output 53, At the output of the element AND-NOT 43 there will be a logical zero.

Thus, in the initial state of the SRI, after the Start signal was applied, the output 53 of the control unit 4 does not have a pulse sequence, the output 50 has a neutral (e.g., negative) level, the output 49 has a logical unit signal, the output 48 has the potential of a logical zero, the output 52 is a sequence of pulses, the output 51 is the logic zero level, and the output 54 of the control unit 4 has no output pulse (Fig. 5). The sequence of pulses is c. the output 52 of the control unit 4 is fed to the counting input of the counter 6, sequentially changing its state. Although the outputs of counter 6 are connected to the outputs of register 8, only the counter code 6 will be present on these buses. This can be obtained if, for example, keys with an open collector output (for example, K155LA8) are used as output elements of counter 6 and register 8. apply special bus amplifiers with three states (Zero, Unit, Break). Then, using the potentials from the outputs 49 and 48 of the control unit 4, which will be supplied respectively to the resolution inputs of the output elements of the counter 6 and the register 8, it is possible to control the output of information to the busbars. This is also true for counter 5 and register 7. Thus, by allowing the potential at the third (gating) input of counter 6 and the inhibitory potential, counter code 6 is present at the gate input of the register for the address inputs of switches 2. Counter code 6 is also provided to the decoder inputs 9 that are blocked by the supply of the inhibitory potential from the fourth output of block 4 control to their first strobing (interlock) inputs. As an example, a decoder with two gating inputs can result in a decoder made on a K155IDZ microcircuit. When a code is sequentially changed at the address inputs of the switches 2, their information inputs, sequentially connected to the output of the touch keys 1 of the corresponding group, transmit their input signals to the output of the switches 2. Then when the operator touches the input of the touch key 1 or when an interference is applied to its input, The corresponding signal arrives at the output of one of the switches 2 at the moment when the code on its address inputs is equal to the number of the given touch key in the corresponding group. The signal from the output of switch 2 is fed to the input of the corresponding element 3, the potential at another input of which is determined by the corresponding output of the decoder 10. At this point in time, due to the presence of a zero level at the sixth output of the control unit L, there are resolving potentials on all outputs of the decoder 10 the decoder 10 is blocked). Therefore, the input signal is fed through the element And 3 to the first input of the control unit 4. Combining the outputs of the And 3 elements can be allowed in the same way as described above in the case of using keys with an open collector output and a total load. The resulting signal of coincidence of the input signal and pulse from the output of the element And 23 through the element And 29 is fed to the shift input of the register 32 of the shift. After the input signal is terminated, a logical zero is set at output 55, a logical unit at output 56, and a logical zero at output 57. At the moment of the transition from a logical unit to a logical zero, a pulse appears at the output of differentiating element 33, which translates triggers 38 and 39 to the zero (prohibitory) state, and also resets the counters 5 and 6 to the initial (zero) states. At output 52, the logic level is unchanged. The pulses from the output of the element 23 will pass through the elements 36 and 40 to the output 52 of the control unit 4, although the first pulse from the new sequence is absorbed by the trigger 38 and element 40. The counter 6 will continue to count the pulses starting from its zero state . If the input signal of the touch key 1 is formed due to the operator touching its input, then due to a certain duration of the touch itself, the counter 6 will reach the same state and a second pulse will be output from the output of the switch 2,

which, through one of the elements AND 3 and the element AND 29, will again enter the input of the shift register 32 and change its state. As a result, this will leave a zero level at output 55, a zero level at output 56, and a single level at output 57. The pulses at the output 52 of the control unit 4 are stopped and the counter 6 is set to the state, the value of which will be equal to the number of the activated sensor key in the corresponding group. Next, you need to determine the group number.

If the input signal of the touch key 1 is due to the presence of a short duration interference, then there will be no second shift at the input of the register 3 and the counter 6 will calculate to its maximum state. The next input pulse, with its leading edge, translates counter 6 into the zero state, and itself through the element NOT 12 enters the input of the element OR NOT 14. At this time, all the inputs of the element OR NOT 14 have zero levels, therefore at its output Wits pulse with a duration equal to the duration of the input Signal of the counter 6. This pulse through the element OR 15 and the integrating element 16 is fed to the input 48 of the control unit 4. The parameters of the integrating element 16 are selected in such a way as to suppress spurious pulses of short duration, which may occur due to the presence of own delays of the counter 6 when it passes, for example, from zero to first state. But at the same time, the normal impulse must pass with minor distortions.

Through the element OR 30 and the pulse shaper 31 to the setup input of the register 32 is shifted, and a pulse arrives that translates it into the initial state, i.e., in code 55 there will be a single level, and at outputs 56 and 57 - zero. Next, the device is ready to receive at its inputs a new interference, i.e. the device suppresses the effect of regular noise of short duration. This device also suppresses the effect of long duration interference and interference that is repeated. Assuming that the interference has a considerable duration or it has repeated, a second pulse was received from it at the first input of control unit 4, then, similarly to that described above, a single level appears on bus 57, and zero at outputs 55 and 56.

At output 53, a sequence of pulses appears, which is fed to the input of counter 5. If by this time the effect of the interference has temporarily ceased, then the third pulse at the input 46 of control unit 4 will not be there and the counter 5 will count 5 ef to its maximum state. the pulse with its leading edge brings the counter 5 to the zero state and through the element NOT 11, the element IPI-NOT 13, the element OR 15 and the integrating element 16 also enters the input 48 of the control unit 4 and puts the device into the initial state. The device is ready to enter its inputs new noise. Thus, the device suppresses the action of. fur of sufficiently long duration, as well as the effect of interference with an increased repetition rate, i.e.

0 has high noise immunity.

The number of the group in which the activated touch key is located. 1, is determined as follows.

At this point in time, a single level is at output 57 and through the AND 37 element the sequence of pulses arrives at the input of the AND 41 element. Since the trigger 39 is in the zero (forbidding) state, the first impulse from this sequence does not pass through the element 41, and by its end (back front) transforms the trigger 39 into the enabling (single) state. Further, all other pulses from this sequence pass to output 53 and to the input of counter 5.

0 After the second pulse arrives at the input of control unit 4, a single potential appears at its sixth output, removing the lock from the decoder 10, which has only

5, at one output, the potential is now enabled, the number of which corresponds to the code in the counter 5. When the code changes, counter 5 sequentially grants permission for the AND elements 3 until the queue reaches the group of sensor keys 1 in which the key has been triggered and to the first input control unit 4 will receive a signal. When a third pulse appears at the input of the shift register 32, all its outputs have zero potentials, the pulse counting by counter 5 stops and it remains in a state whose value is equal to the number of the original group of sensor keys 1. Thus, by this time, counters 5 and 6, the code of the number of the actuated sensor element 1 is formed. When the potential of the unit transits to zero at output 57, the shaper 35 pulses produces a pulse arriving at output 54 and then at output 19 (output Conversion end). The presence of this pulse indicates that the device generated the code of the activated sensor key 1, which serves on groups of outputs of the device. The necessity of introducing triggers 38 and 39 and elements 40 and 41 is due to the following reasons. Before we allow, the touch key is triggered. The number of which must correspond to zero codes of counters 5 and 6. This situation is shown in time diagrams (FIG. 5). After the first pulse arrives on the shift register 32, triggers 38 and 39 and counters 5 and 6 are in the zero state. The next pulse from the output of the element And 23 must pass through the element And 29 and to the input of the shift register 32, In the absence of the trigger 38 and the element And 40 this pulse through the element And 36 would also go to the input of counter 6 and translate it In the first state, t, e, the code in the counter 6 would be wrong. Therefore, the trigger 38 and the element AND 40 absorb this pulse and the code in the counter 6 remains zero. Similarly, for counter 5, the third pulse arriving at the input of the shift register RZ 32 does not pass to the input of counter 5 and the code in counter 5 also remains zero. With codes other than zero, the absorption of a single pulse does not affect the operation of the device. 4O In the proposed device, an additional mode of operation is implemented to control its operability. To transfer the device to this mode at the Diagnostics input (input 1c) of the device, a pulse is applied to the input 44 of the control unit 4 (FIG. 5), and registers 7 and 8 are written the information inputs required code. The input pulse through the OR element 26, the OR element 30 and the imaging unit 31 sets (or confirms) the shift register 32 to the initial state. At the same time, this pulse arrives at the input of the trigger 28 and translates it into a single state. At outputs 48 and 49, non-intersecting pulse sequences occur. The pulses from the output 48 of the control unit 4 are fed to the gate inputs of registers 7 and 8 and the first gate inputs of the decoders 9. At the output 51 of the control unit 4, a sequence of pulses appears (similar to the sequence at the output 48) to the gate input of the decoder 10, During the action of the pulse on the decoder 10 removes the ban, and. therefore, only one of its outputs, whose number is equal to the input code, appears to allow the potential. The input code of the decoder 10 during the pulse at its gate input is supplied from the output of register 7, therefore the enabling potential will be on that output of the decoder 10, whose number is equal to the code in register 7, Thus, the output of one of the decoders 9 appears of the pulses supplied to the second input of the sensor key 1, the output number of this depotfrarator 9, on which a sequence of pulses appears, is equal to the register code 8, these pulses through the semiconductor diode 58 charge the capacitor 59 to the voltage Required to trigger the threshold element 60, the output of which is a signal equivalent to the signal when the touch key is triggered when the operator touches it. The parameters of the charge and discharge circuit of the capacitor 59 are chosen so that it does not have time to discharge between the charge pulses.

P

Diode 58 is required to prevent capacitor from discharging 59 through the output elements of the decoders 9. Resistor 6t provides the necessary bias voltage to fix the position of the operating point of the threshold element 60. After determining the number of the sensor key in the group, which occurs similarly to the described one, On bus 57, and at the output of the OR 34 element, the zero level appears. At the output of the element IS-NE 43 (output 51), a single level appears and the block is completely unlocked from the decoder 10. During the pulses acting on the first gate inputs of the decryptors 9, the information inputs from the decoder 10 will continue to receive information from the register output 7j and therefore, pulses will be sent to the second input of the same sensor key 1, In time with the signals from the output 49 of the control unit 4, the resolving potential appears at the input of one of the IZ elements whose number corresponds to the counter code 5 to the elements 3 and 4 to block the control input to receive a third pulse 32sdviga input register and determining touch key group number output code Formation terminates the advent of pulse at the output 54 which, via OR gate 27 carries a trigger 28 in a state of zero. Next, you need to write a new code in the registers 7 and 8 and submit a new pulse to the input Diagnostics, Meng. 20027412

hence the codes in registers 7 and 8, you can get the output codes of all keys. The process ends with full control of the entire mouth. 5 roystva. Comparison of accepted and applied codes and decision on health or malfunction. device occurs in a separate device

The difference between the operation of the touch key shown in FIG. 3 and the touch key shown in FIG. 4 is as follows. The first key is triggered by

15, the mains voltage in the operator's body, which is related to the input of this key, t, e, at the output of this key, pulses with a frequency of 50 Hz are formed. The duration of each pulse is about 10 ms, which is quite enough to form an output code. The second key is activated when the operator closes the inputs 70 and 71, as a result

25, through the operator, the bias voltage Ugj, goes to the input of the threshold element 68, otherwise the operation of these keys is equivalent.

Touch keys (FIGS. 3 and 4) should be triggered when applied to their

30 inputs of signals with a positive level. When working with signals of a different level, the polarity of the inclusion of semiconductor diodes and the polarity of the bias voltages change

35 on the opposite,

The advantage of the proposed device in comparison with the known is the elimination of various mechs during the formation of the output code, which increases the noise immunity of the device.

F (4d.1

61 64 f f

 60

S-oFig-W

2

tg 7J

55

F1 / &

Claims (2)

1. DEVICE FOR ENTERING INFORMATION on ed. No. 962893, characterized in that, in order to increase the noise immunity, the first and second elements are NOT introduced into it, the first and second elements are OR-HE, an integrating element, an OR element, and the inputs of the first and second elements are NOT connected respectively to the first and third outputs of the control unit, the outputs of the first and second elements are NOT connected respectively to one of the inputs of the first and second OR-HE elements, the other inputs of which are connected respectively to the outputs of the first and second counters, the outputs of the OR-HE elements are connected to the inputs of the This OR, the output of which through the integrating element is connected to the first additional input of the control unit, the second and third additional inputs of which are the corresponding control inputs of the device, the fifth output of the control unit is the third output of the device. 2. The device according to claim 1, wherein the control unit comprises a pulse generator, owls, first, second, third and fourth triggers, first, second, third, fourth, fifth, dough, seventh and eighth elements And, first, second, third, fourth and fifth *. the first OR element, the first and second pulse formers, the shift register, the differentiating element, the element NOT and the AND element, the output of the pulse generator connected to the counting input of the first trigger and the first inputs of the first and second elements AND, the non-inverting output of the first trigger connected to the second the input of the first element And, the output of which is connected to the first input of the third element And, the inverting output of the first trigger is connected to the second input of the second element And, the output of which is connected to the first input of the first element OR , the first input of the fourth AND element and the first inputs of the fifth and sixth AND elements, the second input of the fourth AND element is the input of the control unit, the output is connected to the shift register clock input, the first inputs of the second and third OR elements are the second additional input of the control unit, the second input of the second OR element, and set input "1" of the second flip-flop are the third additional input of the control unit non-inverting output of the second flip-flop coupled to a second input of the third aND gate, ^and inverts vyho - a second input> the first OR element, the first input of the fifth OR element is the fourth input of the control unit, the second input of the fifth OR element is connected to the output of the second OR element, the output of the fifth OR element is connected to the input of the first pulse shaper, the output of which is connected to the installation input of the shift register, the first output of the register the shift is connected to the input of the differentiating element and to the first input of the fourth element OR, the second input of which is connected to the second output of the shift register, the third output of the shift register is connected to the second the ode of the sixth AND element and the input of the second pulse shaper, the output of which is connected to the second input of the third OR element, the output of which is connected to the installation input in O of the second trigger, the output of the differentiating element is the second output of the block and connected to the installation inputs in O of the third and fourth triggers, The output of the fourth OR element is connected to the first input of the AND element and the second input of the fifth AND element, the output of which is connected to the installation input in ”1” of the third trigger and the first input of the seventh. And element, the output of which is the third output of the block, the output of the sixth element And is connected to the input of the installation in 1 of the fourth trigger and the first input of the eighth element And, the output of which is the second output of the block, the output of the third trigger is connected to the second input of the seventh element And, the output of the fourth trigger connected to the second input of the eighth AND element, the output of the third AND element is the fourth output of the block, the output of the first OR element is the second output of the block, and the output of the second pulse shaper is the fifth output Lok, the output of the third AND element is connected to the input of NOT circuit whose output is connected to the second input of AND-NO element whose output is the first output unit. 1 ί