SU1092725A1 - Sensor switch - Google Patents

Abstract

A TOUCH SWITCH containing a multiplexer, the information inputs of which are connected to the corresponding sensor pads, and the control inputs are connected to the outputs of the main counter and register inputs, as well as the decoder, the And element and the output register, the outputs of which are connected to the output buses, characterized in that in order to increase the reliability of operation, a comparison block, D-triggers of blocking, touching, error, recording and control, a polling pulse generator, additional and auxiliary counters and elements OR records, errors and presets, the first bit input of the dexfrator being connected to the clock bus and the auxiliary counter input, the second bit input - with the first bit output of the auxiliary counter, the higher bit output of which is connected to the main counter input and the input the higher bit of the decoder, the first output of which is connected to the C input of the D-flip-flop and through the interrogation pulse generator to the C-input of the multiplexer, the second output to the first input of the OR element, the third the output is with the C-input of the additional counter, the first input of the OR error element and the 5-input D of the recording trigger, and the fourth output with the first input of the OR element, the second input of which is connected to the forward output of the D-control trigger, the first input of the AND element The C-inputs B triggers of the error and write, the third input to the forward output D of the error trigger, the fourth to the inverse output B of the blocking trigger, and the output of the OR element of the record connected to the C input of the output register and the C input of the D trigger lock Whose 5-input is connected to the inversion the output of the control trigger and the second input of the OR element, the third input of which is connected to the second input of the OR element of the preset and the direct output of the D trigger tap, and the fourth input is connected to the second input of the AND element and the output of the comparison unit, the first inputs of which The second inputs are connected to the outputs of the register and the inputs of the output register, while the output of the AND element is connected to the third input of the OR element of the preset, the output of which is connected to the P input of the additional counter and 5-in Ode D Trigger Control

Description

events, the C-input of which is connected to the output of the additional counter, in addition, the output D of the recording trigger is connected to the C-input of the register, and the 5 inputs of the D error and contact triggers are connected to the outputs of the RSh element and the multiplexer, respectively

one

The invention relates to a pulse technique and can be used in control panels of various devices, in particular, in switches and data input devices in computers.

A sensor switch device containing a clock and information buses, a counter, a shift register, p touch pads and a multiplexer, whose information inputs are connected to the corresponding touch pads, the control inputs with the counter outputs and the information inputs of the shift register, the gate input with the clock switch, is known. bus, the counter input and the shift register sync input, and the output with clock inputs of the shift register, the outputs of which are connected to the information buses C 1 3.

The disadvantage of the device is low reliability.

The closest in technical essence to the proposed is a touch switch containing a multiplexer, the information inputs of which are connected to the corresponding touch pads, and the control inputs are connected to the outputs of the main counter and inputs of the register, as well as the decoder, the And element and the output register whose outputs are connected with weekend tires.

A disadvantage of this device is also the low reliability of operation, due to the low reliability of the storage state.

The purpose of the invention is to increase the reliability of operation.

The postavleina circuit is achieved by the fact that the touch switch containing the multiplexer, whose information inputs are connected to the corresponding touch pads, and the control input to the outputs of the main counter and register inputs, as well as the decoder, the And element and the output register, whose output is connected to output buses, a comparison block, an I-trigger for blocking, touching, error, recording and control, a driver for polling pulses, additional and auxiliary counters and OR entries, an error and presets, the input of the first discharge of the decoder is connected to the clock bus and the input of the auxiliary counter, the input of the second discharge - with the output of the first discharge of the auxiliary counter, the output of the higher discharge of which is under ;, the keys to the input of the main counter and the input of the older discharge Yes, the decoder, the first output of which is connected to the Sigma D-trigger trigger and via the interrogation pulse generator with the Mux multiplexer, the second output to the first input of the OR element of the preset, the third output to the S input of the additional counter a, the first input of the element OR error and the S-input of the D trigger of the recording, and the fourth output with the first input of the element OR of the recording, the second input of which is connected. Whose to the direct output of the control p-trigger, the first input of the element And and C-inputs of the D-triggers of error and recording, the third input to the direct output of the B-trigger of the error, the fourth to the inverse output of the D trigger of the lock, and the output of the OR entry is connected to the C input of the output register and C input of the D lock trigger, input 5 of which is connected to the inverted output of the control p trigger and the second input of the OR element, the third input of which is connected to the second input of the OR element of the preset and my output is .0 trigger trigger, and the fourth in od is connected to the second input of the AND gate and the output of Cf. Neny unit, first inputs of which are connected to the outputs of the main counter and the second input - to the output of register

and the inputs of the output register, while the output of the element I is connected to the third input of the element Ш1И preset, the output of which is connected to the R-input of the additional counter and 5 INPUT D-control trigger with the C-input of which is connected to the output of the additional counter, in addition, the output D -trigger record is connected to the register C-input, and 5-inputs S triggers error and touch connected to the outputs of the element OR error and multiplexer, respectively.

Figure 1 presents the functional diagram of the touch switch; 2 and timing diagrams explaining the operation of the touch switch, respectively, in the operating touch mode of one touch pad and the unintentional touch of two pads.

The touch switch contains a multiplexer, p touch pads 2, main counter 3, output register A, output buses 5, decoder 6, clock bus 7, auxiliary counter 8, driver polling pulse 9, D-trigger 10 touch, preset element 11, D-trigger 12 records, additional counter 13, element 14 OR errors, element 15 OR records, D-trigger 16 control, element 17 AND, D-error trigger 18, register 19, B-lock trigger 20 and comparison block 21.

The corresponding information pads 2 are connected to the n-information inputs of multiplexer 1, the control inputs are connected to the outputs of the main counter 3, and the output outputs. the register A is connected to the output bus 5. The input of the lower bit of the decoder is connected to the clock bus 7 and the C-input of the auxiliary counter 8, the input of the second discharge - with the output of the younger discharge of the auxiliary counter 8, the input of the higher discharge - with the output of the older discharge yes auxiliary counter 8 and C-input of the main counter 3, the first output - with the input of the imaging unit 9 polling pulses and the C-input) -trigger 10 touch, the second output - the first input of the element 11 OR preset, the third output - with the S-input D - trigger 12 records, with an additional input counter 13 and the first input of element 14 OR errors, and

The fourth output is with the first input of the element 15 OR record, the second input of which is connected to the forward output of the D-flip-flop 16 controls, the first element 17 And the C-input: the D-flip-flop 1b error and the C-input of the D-flip-flop 12 recording 17 - the input of which is connected to the common bus, and the direct output - to the C input of the register 19, whose information inputs are connected to the corresponding control inputs of multiplexer I, the C input of which is connected to the output of the interrogator 9 polling pulses, and the output from the S- the D input of the trigger 10 kasani, the C input of which is connected to the common bus, and the direct output d - to the second input of the prefix SHS11 element and the second input of the element 14 OR a beep, the output of which is connected to the 5th input of the O-trigger 1B, the D-input of which is connected to the common bus, and the direct gateway to the third input of the element 15 OR records, the fourth input of which is connected to the inverse output of the D-trigger 20 of the lock, and the output - with the C-input {running register 4 and C-input of the D-trigger 20 of the lock, 3-input of which is connected to the third input of the error SHSh 14 and inverse the output of the B-trigger of the 16th control, the C-input of which is connected to the common bus, the C-input - with the output of the additional counter 13, and 5 input - with the R-input of the additional counter 13 and the output of the P OR preset element, the third input of which is connected to the output of the element 17 And, the second input of which is connected to the fourth output of the element 14 OR error and the output of the block 21 Comparison coders, the first inputs of which are connected to the corresponding inputs of the counter 3, and the second inputs - to the corresponding outputs of the register 19 and. I correspond {to the information inputs of the output register 4.

The operation of the touch switch is built on a cyclical basis. The cycle consists of n lines. The line consists of 8 cycles. The duration of clock cycle T is equal to the period of the following clock pulses received via clock bus 7. In each row, one touch pad 2 is polled, and all sites 2 are polled during the {cycle). The control signals required for the touch switch to operate on a cyclic principle are formed by the main and auxiliary counters 3, 8 and the decoder 6. In this case, the conversion rate of the main counter 3-, and the conversion factor of the auxiliary counter 8-4, respectively, determine the number of polled sensor pads 2 and the number of cycles in the original line. Consider the formation of control signals. Positive clock pulses tfig.2d) with a duration of T / 2 and a period of T are sent over the clock bus 7 to the C input of the auxiliary counter 8. In addition, these same pulses (Fig. 2c () and pulses from the younger outputs (Fig. 25 ) and older (Fig. 2c | Raze to the auxiliary counter 8) arrive at the control inputs of the decoder 6. At the outputs of the decoder 6, four pulse sequences are formed (Fig. 2g, d, e, F and Fig. 3c: 6, B, d) negative polarity with a duration of T / 2 and a period of 4T, shifted relative to each other by time T. Control pulses by n The first output (FIGS. 2A ZA) of the decoder 6 phyprypc in the first bar of the row, the pulses at the second output {FIGS. in the fifth bar of the line, and the pulses at the fourth output (figs 2x and 3g) of the decoder 6 in the seventh cycle of the line.The main counter is switched on in series with the auxiliary counter 8. 3. Sequential change of the output states of the main counter 3 leads to alternate polling of information inputs multiplexer 1 connected to the corresponding Touch pads 2. For p n lines interrogate all touch pads 2 will switch. The touch switch has three characteristic modes of operation: functioning when there are no touch pads 2 of the touch field; functioning when touching one pad 2 of the sensory floor; operation when the two or more areas of the sensor field are inadvertently touched. Consider the operation of the touch switch in these modes. In the first cycle of each line of the control, negative polarity pulses (FIG. 2 g and 3 a) from the first output of the decryptor 6 arrive at the C input of the Trigger 10 touch and the input of the driver 9 of the polling pulses. At the output of the imaging unit 9, short interrogation pulses are generated along the positive front of the control pulses (FIG. impulses of the same polarity, for example, in (the t and th line in Fig. 2 and Ze.) From the output of multiplexer 1, the pulses go to the 5th input of the D-trigger trigger 10. At the same time, the D-trigger trigger is first positive pulse (fig.2t. and per) is set to the zero state, for example, in (-1-1) -and the line in Fig. 2k and Zj, and then immediately returns to the initial single state with a pulse of negative polarity (Fig. 2i and 3e from the output of multiplexer 1. At the output The D-trigger 10 contacts generate negative polarity pulses, for example, in (1-1) -th row in Figures 2k and 3, due to the total signal propagation delay in the polling pulse generator 9 and the multiplexer t. However, the duration of these pulses is significantly less than T / 2 and level 1 from the direct output of the D-trigger 10 kasani blocks the elements Nty II, 14 OR presets and errors in subsequent cycles of this line. At the outputs of the elements 11 1 OR presets (Fig. 2m and Zi) and errors (Fig. 2 t and 3 n) there is level 1 in these cycles. In the fifth cycle, the lines controlling the negative polarity (Fig. 2, 3 01 from the third The outputs of the decoder 6 are received at the 5th input of the D-trigger 12 record and the C input of the additional counter 13. The first of these pulses, after turning on the power source, sets the D-trigger 12 records to a single state.The next pulses only confirm this state B - recording trigger 12. At the direct output - trig .. Gera 12 recording (FIG, 2p and Zn) are present After switching on the power source, the control pulses from the third output of the decoder 6 7109 are counted with an additional counter 13. With capacity N. When the additional counter is filled to N / 2 pc, a positive differential from its output (fig.2n and Zc | sets the B-trigger 16. Control level to zero state. The level O from the direct output D of the trigger control 16 of Fig. 2O and 3L I closes the element. 17 I. At its output (Fig. 2 l and 3h) the level O is also set. Level 1 from the inverse output B-flip-flop 16 controls (Fig. 2n and HALL) tion blocking element 14 or an error. Subsequently, the additional counter 13 continues to read the control pulses, arriving at its C-input in the fifth cycle of each row. However, the positive drops from its output only confirm the zero state of the D-trigger of the 16th control. In the seventh cycle, the negative polarity control pulses (Fig. 2g and 3i) from the fourth output of the decoder 6 arrive at the input of element 15 of the OR record. Since when the power source is turned on, the D-triggers 18, 20 errors and locks can be set to an arbitrary state, two cases are possible. In the first, 1) -thrigger 18 errors are set to the zero state, and D -trigger 20 blocking is set to one. From the direct output) error trigger 18 and inverse output D-trigger 20 blocking and element 15 OR recording levels O arrive. The same level goes to element 15 OR records from the direct output D control trigger 16. At the same time, the first control pulse, having passed through the logic element 15 OR records, sets the D lock trigger 20 to the zero state with a positive front. At the inverse output 1) -three blocking 20, level 1 appears and blocks element 15 of the OR record. The following control pulses do not pass through the element 15 OR. In the second case, the D-flip-flops 18, 20 errors and blockages are set to such a state in which the first or second or both simultaneously block element 15 of the OR record. Thus, in the absence of touch of the touch pads 2, the binary code on the output buses 5 does not change. 8 If you touch any one, example i-th, pad 2 of the sensor field, the capacity of the operator’s body is added to the mounting capacitance of this pad 2 and the capacitance of the i-ro information input of multiplexer I. The total capacity does not manage to charge to level 1 during the time of the short interrogation pulse (Fig. 2h) and in the 1st line of each cycle the output pulses (Fig. 2i) of the multiplexer I do not pass. At the same time, in the first cycle the 1st the control pulse line (Fig. 2d | from the first output of the decoder 6 sets the D-flip-flop 10 tangles to zero: where it remains until the end of the first beat of the next row. Level O from the direct output of the D-trigger 10 touches (Fig. 2k | unlocks the elements 11, 14 OR presets and errors in the noc next steps of this string. In t In the next step of the i-th line, the control pulse of negative polarity (fig. 2d) from the second output of the decoder 6 passes to the output of the AND OR preset element (4mg.2), reset to zero. Triggers of the additional counter 13 (Fig. 2n) in one state and setting 5 -thrigger 16 controls (.2о, п), Positive voltage drop from i direct output D -trigger 16 controls (управmg.2o) sets to zero state U -triggers 12,18 records (Fig. 2 p) and errors (Fig. 2b. Level 1 from the direct output of the D -trigger 16 control (Fig. 2o) opens the nt 17 (fig.2l | and blocks one of the inputs on the element 15 OR record. The level O from the inverse output of the trigger 16 of the control (FIG. 2p) releases the element 14 OR errors and sets the lockout trigger 20 to the state 1 (FIG. 2 f). Level O from the direct output J) -trigger 12 recording (fig.2r) overwrites the binary code of the number of the i-th tangential platform 2 of the touch field from the main counter 3 to per-J. hist 19. At the same time, in the i-th row of each subsequent cycle, the same codes arrive at the inputs of the code comparison unit 21, and the level 21 output of the block 21 (Fig. 2c). This level is fed to the input element 17 And, it opens level J from its output (Fig.2l) blocks

9109272510

Element 11 OR presets (Fig. 2m I, tangency two, for example i and and (+1) th

Level I from the output of block 21 of the comparative pads 2 sensory floor. In that

the codes (Fig. 2c) are received by the case of the element 14 of the OR following error and blocking, for example, the 1st line of the cycle following the moment

em it. Level O with inverse 5switch works similarly

D-trigger output, 20 locking indications. Set at zero (FIG. 2F | unlocks one by one from the other state D - trigger 10 touches

inputs element 15 OR records. (Fig., are reset to zero

In the fifth cycle of the i-th control-state line, an additional counter ley impulse (fn.2 € | from the third O13 (Fig. 3k), is installed in the output of the decoder 6, sets the D state of the flip-flop 16 upR-trigger 12 records to one Equal. Zl, m), binary code status. At the output of element 14 of the Ilomer of the i-th tangential pad 2 of the erroneous, the control impulse of the non-walk-through field is rewritten from the die, since it is blocked by the level of the 5-meter counter 3 to the register 19 and, 1 from the output of the block 21 (Fig. 2e). Finally, the D-trigger 18 errors (for each row, the same control impu-sets are set to zero for each row, and the lengths from the third output of the lockout trigger lock 20 (FIG. 2c | in 6 also go to the C input for the complementary state , telny counter 3 and counting- 20 In the first cycle (i + l) -th row of the same cycle the control pulse

In the seventh cycle of the 1st line of control (fig. 2 of the first output, a decrypting pulse (Fig. 2) from the quarter-motor 6 confirms the zero connection).

The output of the decoder 6 enters the D-Trigger 10 contact (FIG. LJ /.

input element 15 OR record. However, Level O from the direct output of the D-Trig,

on this item (fig.2x} 10 tangles (fig. Зж) opens

does not pass, because the element OR 15 elements AND, 14 OR presets and

records locked by level 1 errors in subsequent bars

direct output D-trigger 16 control line. In (i -sh line on the outputs

nor (fig.2o | .30 main counter 3 is present

 . - 1 binary code of the number (i + l). At the outputs

Sen works similarly, i. r small

., l. / register19 is present

a touch switch when touching the tth,,. „Aiuiv-annom

pads 2 of the sensory field and in the after-row the binary code of the number I. Duxnx (K-2) cycles. In the K-th cycle “P” from the moment of the contact of the i-th platform 2 by 35 comparisons of codes, the level O, t (fig.sok This level goes to

S-input of the additional counter 13 s, t „v, 1,110.

the third output of the decoder 6 post-° 17 I, it closes and

nU, N / 2. The PC - and the control pulse, f ° ° ° ° J "" "blocks element 11 OR the preset Senior level of the additional account-:.„ „.. . ,

Chica 13 is set to a single 0 "" VkI. In addition, the level O (FKPZo). 1.FNG.2I state), and a positive ° 21 comparison of the codes from its direct output departs the element 14 OR errors, turns into the zero state of the D-trigger-third cycle (lines, y, o); negative impulse

ger 16 control (Fig. 2 o /. Level.,

About the direct output of the B-flip-flop 16 5 polarity (Fig. 36) from the second control output (Fig. 2o) unlocks the Elec- 6 Fs 6 passes to the output element 15 OR of the recording and the control “preset ™” (Fig. Zi), the pulse (Fig. 2g) in the seventh clock cycle, dropping to the zero state before the same line passes through the electronic counter 13 (Fig. 3k) and ment 15 or the record (Fig. 2x). On the C-input 50, the unit state of the output register 4 is confirmed The binary code of the J-flip-flop 16 controls (FIG. 3L, LL). The numbers of the i-th tangential pad 2 sender trigger 12 (FIG. 3, the trash floor remains overwritten from the retransmitting state. Overwriting of the G9 J9 into the output board 4, Binary code of the number ()) counter 3 to register 19 is not the same as the code number of the 1st touch area-55

G is exhausted.

Ki 2 appears on the output bus 5.

Let us now consider the operation of the sensor-in the fifth cycle (f + 11th row of the upgo switch with an unintentionally equaling pulse (Fig. 3b from the third output of the decoder 6 confirms a single state) -trigger 12 record (Fig. 3n), increases by one the contents of the additional counter 13, and the passage through the open element 14 OR errors (FIG. S3), sets the error D-flip-flop 18 (mg.Zr) to one state. Level 1 from the direct output of this trigger (Fig.Zp) blocks the element 15 OR records.

In the seventh cycle (1 + 1) -th row, the control pulse (4IG.3 g) from the fourth decoder 6 is fed to the input of element 15 of the OR record. However, it does not pass to the output of this element (.3t), since it is blocked. The code is not overwritten from register 19 to output register 4. The binary code on the output bus 5 does not change. The touch switch works in a similar way when not deliberately touching three, four or more sites of 2 touch floors.

Thus, at the moment of touching any pad 2 of the sensor switch field, a block is started containing an additional counter 13 and a D-trigger 16 control. An additional counter 13 counts K cycles, during which it is checked whether the other areas 2 touch the touch field. If during K cycles, i.e. during the time interval 4 "iTK, the touch of only one pad 2 touch by l is fixed, then the binary code of the number to be touched: pad 2 is rewritten from register 19 to output register 4 and goes to the output tires 5. If zifiksirovrn touch two or more platforms 2 then rewrite

from register 19 to output register 4. HC is produced, the code on the output tires 5 remains unchanged. At the same time, the 4pTK time interval should obviously exceed the transient time when touching t) for a cycle of 4pT and at the same time be not so long that the operator felt the delay ip of the operation time of the touch switch as compared to the moment of touch of the touch pad, t. e.

01

t t

14g

Transforming (1), we obtain a relation for choosing the value of K:

t., t p

U1

 . g 4pT 4p I

Introduction to the touch switch of the comparison block, D-triggers of blocking, touching, error and control, OR entries, preset errors, ICOB polling impulses, additional and auxiliary counters provides increased reliability of its operation.

Indeed, the new state, characterized by a new code on its output tires, the touch switch switches only if it touches one site, which, if the touch field is tightly assembled, can be the result of a purposeful action. This makes it possible to significantly increase the reliability of the storage of the state of the sensory switching of bodies, which makes it possible to use it in control panels for responsible objects whose accidental change in state is unacceptable.

Riga.1

s l11Sh1shlt: zhtshpsha: 1psh1pga1:

"JinnilllJlJlJ G1G1PPG TTPPG TPP

 tlgtpgpngtlg gx g eppgt-pppg-tppg

 LGTPPG1PGTLPG1GTT

If-l 1 G PP-1 PP PKN-2 fK + J-lfK i

3 1 I I I g 1 I - 1 I

WT rm

1 g I

.gl

ff

.shlplsht. tgitp

TPGT1GPGGGG

vppttirinr

1-1 t l + f l-f-2

I I I

1 n

III TnLTTI I I

fui.l

Claims (1)

A TOUCH SWITCH containing a multiplexer, the information inputs of which are connected to the corresponding touch pads, and the control inputs are connected to the outputs of the main counter and the inputs of the register, as well as a decoder, an And element and an output register, the outputs of which are connected to the output buses, characterized in that, with In order to increase the reliability of operation, a comparison unit, D-triggers for blocking, touching, error, recording and control, a pulse generator of the interrogation, an additional and auxiliary counter are introduced into it ki and elements OR records, errors and presets, the input of the first bit of the decoder connected to the clock bus and the input of the auxiliary counter, the input of the second bit to the output of the first bit of the auxiliary counter, the output of the highest bit of which is connected to the input of the main counter and the input of the senior bit of the decoder, the first output of which is connected to the C-input of the D-flip-flop and through the pulse shaper polling with the C-input of the multiplexer, the second output - with the first input of the OR element of the preset, the third output - with the C-input additional counter, the first input of the OR element of error and the S-input D of the recording trigger, and the fourth output with the first input of the OR element of recording, the second input of which is connected to the direct output of the D-trigger, the first input of the element And and C-inputs P - error and write triggers, the third input is to the direct output of the error trigger D, the fourth is to the inverse output of the L-trigger, and the output of the OR entry is connected to the C-input of the output register and the C-input of the R-trigger, The 5th input of which is connected to the inverse output of the D-trigger, and the second input of the OR element of error, the third input of which is connected to the second input of the OR element of the preset and the direct output of the D-trigger, and the fourth input is connected to the second input of the AND element and the output of the comparison unit , the first inputs of which are connected to the outputs of the main counter, and the second inputs - with the outputs of the register and the inputs of the output registers, while the output of the AND element is connected to the third input of the OR element of the preset, the output of which is connected to the P-input an additional counter and the S-input of the 0-trigger control, the C-input of which is connected to the output of the additional counter, in addition, the output of the D-trigger of the record is connected to the C-input of the register, and the S-inputs of the D-trigger errors and touch are connected to the outputs of the element OR errors and the multiplexer, respectively.