SU1251034A1 - Device for tolerance checking of parameters - Google Patents

Abstract

The invention relates to instrumentation and can be used in the control of discrete devices, in particular computers. The introduction of two elements NOT, two elements And, the element of ICH allows to increase the reliability of control by providing control of the time parameters of the object being monitored with greater completeness, since it allows to carry out the control taking into account the tolerance time of issuing time commands, control taking into account the time tolerance command start and end, command fault monitoring. The device contains a control unit, an input switch, four AND elements, three NOT elements, three flip-flops, two pulse drivers, two decoders, an NL element, an output switch, and a display unit. 4 il.

Description

"

The invention relates to instrumentation and can be used in the control of discrete devices, in particular computers.

The purpose of the invention is to demonstrate the reliability of the control device.

FIG. 1 shows a block diagram of the device; in fig. 2 is a time diagram of the operation of the device, corresponding to different control conditions in FIG. 3 is a control block diagram; Fig, 4 is a diagram of the cell display unit.

The block diagram (Fig. 1) shows the control block 1, the source 2 of the controlled parameters, the input switch 3, the second 4 and the third 5 elements NOT, the fourth 6 and the third 7 elements. And, element OR 8, first trigger 9, first element NOT 10, second 11 and first 12 pulse shapers, first 13 and second 14 elements AND, third 15 and second 16 triggers, first 17 and second 18 decoders, logical processing unit 19 , output switch 20J display unit 21.

On time diagrams (fig. 2) the lower border of the field is indicated.

22 tolerances, upper floor limit

23doors, single 24 and zero 25 outputs of the first trigger 9, output 26 of the input switch 3, output 27. of the second element NO 4, signal from the first output 28 of control unit 1 (shear control) 5 output 29 of the third element

. NOT 5, the outputs of the fourth 30 and third 31 elements. And 6 and 7 ,, output 32 of the element OR 8, output 33. of the first element NOT 10, output 34 of the second driver 11 pulses, output

35 of the first element And 13, single

36 and zero 37 outputs of the third trigger 15, output 38 of the first driver 12 pulses, output 39 of the second element AND 14, unit 40 and zero 41 outputs of the second trigger 16, outputs of the first 42 and second 43 decoders G / and 18.

The control unit 1 (Fig. 3) contains a clock pulse generator 44, the AND element 45, binary-decimal counters 46, decoders 47, the dual switch of the Spiral 48 Stop-start, the driver of the pulses 49, the OR element 50, the control trigger 51, block 52 recruitment, match items 53. Output triggers 54 decoders 47 are connected to the inputs

0

five

510342

block 52, the outputs of which are connected via elements 53 coinciding with the inputs of the output flip-flops 54, the outputs of the latter are the outputs of the block

control, and the output of the last of the output triggers 54 is also connected to the input of block 52,

FIG. 4 shows one of the cells 55 of the display unit 21. It consists

0 of three triggers 56, the outputs of which are connected respectively to the three banners 57: In the tolerance Less tolerance and More tolerance. The unit inputs of the flip-flops 56 are 5 with the inputs of the display unit 21, and the zero inputs of the flip-flops 56 of all the cells 55 of the indication unit 21 are connected to the switch 58 Reset the indications, the other two terminals of which are connected to zero and one logical voltage levels respectively.

, The device works as follows.

Control unit 1 is a command-and-control device, which, in accordance with the program, controls the control signals. To turn on the control unit 1, the switch 48 is switched to the Start position, and the control signal through the pulse shaper 49 is fed to the single input of the trigger 51 and removed from its first input and from the installation inputs of the counters 46 to zero (R). At the output of the flip-flop 51, a signal appears that arrives at the second input of the element I 45 and permits the passage of pulses from the generator 44 clock pulses to the counting input of the first

counter 46. The frequency of the generator pulses depends on the required time resolution, and the number of counters 46 and accordingly the decoders 47 on the duration of the test. When the first counter 46 overflows, the signal from its output P is fed to the input C of the second counter 46, etc. (i.e., the counters 46 together with the decoders 47 form the decad time counter of the DSW, the outputs n; the last one is entered into the block 52 of the program set, which performs in the control block 1 the role of the program-setting 55 Output triggers 54 are controlled via coincidence elements 53, with elements connected to a single input trigger 35

40

45

50

3

Ditch 54, are intended to turn them on, and to zero, to turn them off, i.e. to issue and remove a command corresponding to the given trigger. The number of output triggers 54 corresponds to the number of commands executed by the block, if the same command must be issued n times, i of the matching elements must be connected to each of the inputs of the corresponding trigger via the OR element (not shown). Match items 53 have a number of inputs equal to the number of decoders 47 (counters 46), i.e. DSV bits, and each of the inputs can be connected to only one of the outputs of the corresponding decoder. Thus, the operation of each match element 53 (switching off output triggers 54 was turned on) occurred at the instants of time determined by the crossover of its inputs to the outputs of the decoder 47.

The operation of the control unit 1 can be stopped manually, by switching the switch 48 to the Stop position, automatically by overflowing the DSW, according to the program.

In all these cases, the signal from either switch 48, either from the P output of the last counter 46, or through the block 52 from the output of the last trigger 54 goes to the OR 50 element, and from its output to the zero input of the control trigger 51, which removes the signal from the element I 45 and to the combined inputs of the installation of counter 46 is zero, i.e. brings the device to its original state, and in the latter case, the inputs of the coincidence elements 53 connected to the zero input of the last output trigger 54 must be connected to the zero outputs of the decoders 47, then the specified trigger will switch to the initial state after zeroing the counters 46.

In the control cycle of the i-th parameter, the control unit 1 generates control signals by which the input switch 3 connects from the source 2 monitored parameters to the input of the logic processing unit 19, the controlled parameter and the parameter, while the output switch 20 connects the corresponding memory cells of the block 21 to display counter results

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l; th parameter. Then the control unit 1 generates signals in the form of time intervals, characterizing the beginning 22 and the end 23 of the tolerance field of the parameter, to the single and zero inputs of the trigger 9. On its inputs, opposite signals are formed in the form of time intervals, the duration of which is equal to the tolerance field. The signal 24 from the single output of the trigger 9 is supplied for comparison with the monitored parameter to one of the inputs of the AND 13 element. The controlled –. command goes to the AND 6 element and the NO 4 element, from the output of which the inverted signal goes to the AND 7 element. signal 28 from the block

The control is open element AND 6, and the element And 7 is closed. Thus, the monitored parameter passes unchanged through the elements AND 6, OR 8 and enters the driver

I1 impulses, which generates a short pulse along the front of the time interval of the monitored parameter, which arrives at the second input of element I 13 and through the element NOT 10 to one of the inputs of element I.14, to the second input of which is from zero output three1: hera 9 through forwarder

12 pulses, a short impulse upper limit of the tolerance field is applied. The first AND 13 compares the temporal position of the short pulse corresponding to the front of the controlled command with the tolerance field. If a short impulse enters the tolerance field, then a short impulse appears at the output of AND 13, which arrives at the unit input of the trigger 15 and sets it to the unit state, while the signal at the unit output of the trigger 15 is formed in the tolerance 36 (Fig. 2a ), which is fed to the corresponding cell of the display unit 21 via the output switch 20. The cell layout of the display unit is shown in FIG. 4. Signals Not in tolerance (More tolerance, Less tolerance) are blocked by the inputs of the decoder 17 and tS, which is connected with the zero output of the trigger 15.

If the short pulse of the output of the driver 11 does not fall on the time interval of the tolerance field, about the output of the element I 13 there is no signal, and the trigger 15 remains in

zero position. In this case, at the single output of the trigger 15, the signal is also absent in the tolerance.

Element I 14 compares the temporal position of the front of the command being monitored with the upper margin of the tolerance field represented by a short pulse. If the front of the controlled command coincides with or exceeds the upper margin of the tolerance field, then a short impulse appears at the output of the element 14 and sets the trigger 16 to one state.

In this case, two cases are possible. In the first case, the front of the controlled team coincides with the upper limit of the tolerance floor. At the same time, the output signals from trigger 16 arriving at the first inputs of decoder 17 and 18 are blocked by the second inputs by a signal taken from the zero output of trigger 15. With the outputs of decoder 17 and 18, the signals More tolerance and Less tolerance to the output switch are not received.

In the second case, if the monitored parameter is outside the tolerance field, Trigger 15 is in the zero state, decoders 17 and 18 are opened with the He signal in the tolerance from the zero output of the trigger 15. In this case, the signal taken from the single output of the trigger 16 goes to the second input decoder 17, - at the output of which a signal More than a tolerance is generated, which is fed to the display unit 21 through the output switch 20. The signal from the zero output of the trigger 16 closes the decoder 18 (Fig. 2B).

If the monitored parameter is less than the tolerance (Fig. 2), then the triggers 15 and 16 remain in the zero state, while the signals from the zero outputs go to the inputs of the decoder 18, the output of which forms the output signal Less than the tolerance, enters Ziy through the output switch 20 on the display unit 21.

After finishing front control

the commands from the control unit 1 sends the signal to set the flip-flops 15 and 16 to O, the signals are generated that form the tolerance field 22 and 23, and the cut command control signal 28 is received, which locks the AND 6 n

opens the element And 7, through which the inverted controlled command from the output of the element NOT 4 enters

5 to the element OR 8 and from its output to the inverter 10; shaper 11, which in this case produces a short pulse across the parameter slice. Control unit 1 generates signals in

0 type of time intervals, characterizing the beginning of the 22 and the end of the 23 floor tolerance slice parameters. Then everything is done in the same way as the front of the monitored parameter.

S (figg,),

Thus, the proposed device provides control of the issuance time, taking into account the tolerances of both the front and the cut-off time commands, i.e.

0 start and end times.

If there is a gap in the command between the front and the cut, the former 11 generates a signal similar to the one at the end of the command, which

5 will be fixed by the device as its premature termination.

Claims (1)

Formula from the range 0 The device for the tolerance control of parameters containing the control unit connected to the first, second and third outputs respectively to the output of the device and to the control 5 inputs of the input and output switches, and the fourth and fifth outputs, respectively, to the single and zero inputs of the first trigger connected to the first input by the direct output The first element And, the second input of which is connected to the output of the second pulse shaper, and the inverse output through the first pulse shaper - with the first input of the second And element connected by the second input to the output of the first element is NOT, and the output is to the single input of the second trigger connected to the direct and inverse outputs  with the first inputs, respectively (the first and second decoders, and the zero input - with the sixth output of the control unit and with the zero input of the third trigger connected by a single input to the output of the first And element, the forward output to the first information input of the output switch, and the inverse output - to the second inputs of the first and second de (Encoders connected by the outputs with the second information inputs of the output switch, the connected output, to the inputs of the display unit, information: the input inputs of the input switch are connected There are devices with inputs that, in order to increase the reliability of the control, the element OR, the third and fourth elements AND, the second element NOT and the third element NOT connected to the seventh output of the control unit are introduced into it. 10348 Leni and to the first input of the third element And, and the output to the first input of the fourth element And connected by the second input to the output of the Input Switch and through the second element NOT to the second input of the third element AND connected by the output to the first input of the OR element connected by the second an entrance with an exit of the fourth element, and an exit - with an entrance of the second form; pulse pulses and the first element is NOT. fig 2 „CfrrafT r Ig.E SB 9 SB -6 o- one , „I tffue.A