SU1487151A1 - Time interval shaping unit - Google Patents

Description

The invention can be used in experimental installations and in automated process control systems. The purpose of the invention is to improve the accuracy of formation

2

time intervals - achieved by binding the beginning of the formation of time intervals in the channels 8 of formation of pulses to the pulses of the generator 1. Information about the duration of the formed time intervals is copied from the storage unit 5 to the channels 8 of formation of pulses under the control of the pulses from the output of the decoder 6. Element OR 2 and element And 4 organize the operation of the device in three modes, depending on the combination of logical zeros and ones at the inputs 9, 10 of the control. The device also contains shapers 3, 7 pulses. 1 h. item f-ly, 1 ill.

with

55

1487151

The invention relates to digital technology and can be used in experimental installations and in automated process control systems.

The purpose of the invention is to improve the accuracy of the formation of time intervals.

The drawing shows a functional diagram of the device for the formation of time intervals.

The device contains a generator 1, an element OR 2, a pulse shaper 3, an AND 4 element, a storage unit 5, a decoder b, a pulse shaper 7, pulse shaping channels 8.1—8.p, control inputs 9-12, information input 13, synchronization output 14 , outputs 15.1 —15. η channels of pulse formation.

The output of the generator 1 is connected to the first inputs of the formers 3, 7 pulses, the storage unit 5, the channels 8.1 - 8.η forming the pulses. The output of the element OR 2 is connected to the second input of the pulse shaper 3, the output of which is connected to the second input of the storage unit 5. The first input of the element OR 2 is connected to the control input 9, and the second input is connected to the output of the AND 4 element, the first input of which is connected to the input 10 control, and the second input - with the output 15.η of the formation channel and the second input of the channel 8.η formation of pulses.

Inputs 11 and 12 of the control are connected to the third and fourth inputs of the storage unit 5, the fifth input of which is connected to the information input 13. The first output of the storage unit 5 is connected to the first input of the decoder 6, the second input of which is connected to the second output of the storage unit 5, the third output connected to the second input of the pulse shaper 7, the output of which is the synchronization output 14 and connected to the third input of the pulse generation channel 8.1.

The outputs of the decoder 6 are connected to the corresponding fourth inputs of the channels 8.1—8.η of pulse generation.

The output of the pulse generation channel 8.1 is the output 15.1 of the device and is connected to its second input and to the third input of the pulse shaping channel 8.2, and then the output of the previous channel 8.K of the formation of pulses is connected to its second input and to the third input of the subsequent channel 8.K + 1 pulse formation.

The fifth output of the storage unit 5 is connected to the fifth inputs of the channels 8.1—8.η η forming pulses.

The storage unit 5 contains the generator 16 series of pulses, the counter 17, the register 18.1 - 18.P. The first and second inputs of the generator 16 are respectively the first and second inputs of the storage unit 5. The third input of the generator 16 is connected to the overflow output of the counter 17 and is the third output of the storage unit 5. The first output of the generator 16 is connected to the clock input of the counter 17 and is the first output of the storage unit 5. The outputs of the counter 17 are the second output of the storage unit 5. The second output of the generator 16 is connected to the clock inputs of the sequential reception of information registers 18.1 —18.p, the inputs for selecting the operating mode and st robots of parallel reception of information of which are, respectively, the third and fourth inputs of the storage unit 5. The information input of the register 18.1 is the fifth input of the storage unit 5. Next, the information outputs of the register 18.K (K = 1, 2, ..., η — 1) are connected to the information inputs of the register 18.K + 1, and the information outputs of the register 18.n are the fourth output of the storage unit 5. The output of the register high register 18.K is connected to the input of the serial reception of register information 18.K + 1, and the output of the register high register 18. P oedinen to the input serial data reception register 18.1.

Channels 8.1—8.η pulse formations contain trigger 19, element I 20, counter 21. The first input of element AND 20 is the first input, the channel input 8.K (K — 1, 2, ..., n). The second input element And 20 is connected to the output of the trigger 19, the reset input of which is the second input of the channel 8.K and connected to the overflow output of the counter 21, which is the output of the channel 8.K- The installation input of the trigger 19 is the third input of the channel 8.K. The output element And 20 is connected to the clock input of the counter 21, the input of the installation resolution of which is the fourth input of the channel 8.K · The information inputs of the counter 21 are the fifth input of the channel 8.K.

The generator 16 of a series of pulses contains triggers 22, 23, 24, counter 25, decoder 26, element AND 27. The first input element And 27 is connected to the clock input of counter 25 and is the first input of generator 16. The set and reset inputs of trigger 22 are second and the third inputs of the generator 16. The output of the trigger 22 is connected to the reset input of the counter 25, the outputs of which are connected to the inputs of the decoder 26. The first output of the decoder is connected to the installation input of the trigger 24, the reset input of which is connected to the second output of the decoder 26 and to the input of ki trigger 23, a reset input coupled to a third output of the decoder 26. The output latch 24 is coupled to a second input of AND gate 27 whose output is the second output of the generator 16. Output latch 23 is a first output of generator 16.

1487151

The device works as follows.

Three modes of operation are possible: 1 - recording mode; 2 - mode of a single formation of time intervals; 3 - mode of cyclic formation of time intervals.

In the initial state, the triggers 22-24 and the triggers 19 of all channels 8.1-8.η in the zero state. The counters 17 and 25 are in the zero state, and the counters of the 21 channels 8.1-8.p are in arbitrary.

In the recording mode, a record is made in the storage unit 5 from the information inputs of 13 η numbers, one for each channel 8, defining the required durations of the formed time intervals. To translate the device into this mode, it is necessary to set the appropriate potential at input 11, which will go to the inputs of selecting the mode of registers 18 of the storage unit 5. After this, information numbers 13 are alternately fed η numbers gated by the signal applied to input 12. This input is connected with gates parallel reception of information by the inputs of registers 18. Therefore, after η cycles of reception of the number will be recorded in registers 18.

To transfer the device to the second mode, it is necessary to input the corresponding potential signal at input 11. This voltage registers 18 are transferred to the sequential mode of receiving information. In addition, the input 10 must be given a zero signal. The device is triggered by a signal supplied from input 9 through the OR 2 element to the second input of the shaper 3 synchronized by the generator 1 pulses. The signal from the shaper 3 output goes to start the generator of 16 series of pulses, which forms two non-overlapping periodic sequences of pulses: at the second output - I pulses, arriving the clock inputs of the sequential reception of the information of the registers 18, at the first output - a single pulse arriving at the counting input of the counter 17 and the gate input of the decoder 6. The gene Rathore 16 generates η sequences such as after η-th pulse output from the first counter 17, it generates an overflow signal to the reset input of flip-flop 22. This signal generator 16 is stopped. The counter 17 and the decoder 6 form the pulse distributor. The pulses from the p outputs of the decoder 6 are fed to the enable inputs of the installation of counters 21 of the corresponding channels 8. Consequently, in one period of operation of the generator 16, the numbers recorded in registers 18 will shift by one register in the direction of large serial numbers of these registers, while the number of register 18.η will be overwritten in register 18.1, and the number recorded in register 18.P — 1 will go to the information inputs of the counters 21 of all channels 8 and the signal from one of the outputs of the decoder 6 will be recorded in the counter 21 of the corresponding channel 8. Thus, for η periods Started number generator 16, stored in registers 18, counters 21 can be rewritten in the channel 8. Furthermore, the counter 17 outputs an overflow signal synchronized generator 7 with the clock generator 1, goes to the output 14, indicating the start of formed slots. The same signal is fed to the input of the installation of the trigger 19 channel 8.1. The signal from the direct output of this trigger opens the element And 20, which passes 21 pulses of the generator 1 to the counting input of the counter. After the arrival of a certain number of pulses, an overflow signal is generated at the output of this counter, which resets the trigger 19 of channel 8.1. This trigger respectively closes the element And 20, the pulses on the counting input of the counter 21 are not received. In addition, the overflow signal from the output of the counter 21 of the channel 8.1 is fed to the output 15.1 and to the input of the installation of the trigger 19 of the channel 8.2. Further operation of channels 8.1—8.p is similar to the operation of channel 8.1. The signal at the output 15.K is a signal of the end of the ίth time interval and the beginning of the formation of the (1 - (- 1) -th time interval.

The generator of 16 series of pulses is triggered by a signal received at the input of the trigger setup 22. Trigger 22 is triggered - the reset signal, which arrives up to this point from the inverse output of this trigger to the reset input of the counter 25, terminates. From this point on, the counter counts 25. the outputs of this counter are sent to the information inputs of the decoder 26. After switching the counter 25 to the first, after the initial, state, the signal from the first output of the decoder 26 is removed, the th trigger 24 in one state. The signal from the direct output of this trigger opens the element And 27, which passes to the second output of the generator 16 the pulses of the generator 1. After the arrival of the (£ 4-1) th pulse to the counting input of the counter 25, the signal from the second output of the decoder 26 flips the trigger 24 to zero , and the trigger 23 in a single state. Therefore, the element And 27 is locked, and the signal from the single output of the trigger 23 is fed to the first output of the generator 16. After the next (£ + 2) -th pulse arrives at the counting input of the counter 25, the signal from the third output of the decoder 26 resets the trigger 23 - the signal c its direct output is removed. When passing the counter 25 through the initial state

1487151

7

the period of formation of pulses at the outputs of the generator 16 is repeated. The generator 16 is stopped by a signal arriving at the reset input of the trigger 22. In this case, a single signal from the inverse output of the trigger 22 prohibits the operation of the counter 25 and resets it to its original state.

The difference in the installation of the device in the third mode from the installation in the second is in the supply of a single signal to the input 10. Therefore, the signal from the output of the channel 8.η through the element And 4 restarts the device on the second input of the element OR 2. The whole cycle is repeated, the description of which is given when describing the operation of the device in the second mode. The cycles of formation of time intervals are repeated until the removal of a single signal from the input 10.

Claims (1)

Claim one.' A device for forming time intervals, containing a generator, channels for forming pulses, the output of the previous channel being connected to the first input of a subsequent channel, characterized in that, in order to increase the accuracy of forming time intervals, the element OR, the first and second pulse shapers, the element AND are introduced into it , a storage unit, a decoder, the generator output being connected to the first inputs of the first and second pulse formers, pulse shaping channels, the storage unit, the second input of which о is connected to the output of the first pulse shaper, the second input of which is connected to the output of the OR element, the first input of which is connected to the output of the AND element, the first input of which is connected to the output and the second input of the last channel, the first and second control inputs are connected to the corresponding second inputs of the OR element And the element And, the third and fourth control inputs are respectively the third and fourth inputs of the storage unit, the fifth input of which is eight the information input, the first and second outputs of the storage unit are connected respectively to the first and second inputs of the decoder, the outputs of which are connected to the corresponding third inputs of the channel ⁵ pulse generation, the third output of the storage unit is connected to the second input of the second pulse shaper, the output of which is connected the first channel of formation of pulses 10 the fifth input of which is connected to the fourth output of the storage unit, the output of each channel, except the last one, is connected to its second input and to the fourth input of the subsequent channel. $ 2. Device by π. 1, characterized in that that the memory unit contains a pulse train generator, a counter and n registers, with the first and second inputs of the pulse train generator being the first and second inputs of the> 0 storage unit, the first output of the pulse train generator is connected to the first input of each register, and the second output is first the output of the storage unit and connected to the counting input of the counter, the overflow output of which is the third output of the storage unit and connected to the third input of the generator of the series of pulses, the information output The counters are the second output of the memory block, the information inputs of the first register of the first are the fifth input of the memory block, the information outputs of each register, except for the last one, are connected to the information inputs of the next register, the high-order output of the previous register is connected, besides 35 with the second input of the subsequent register, the information outputs of the last register are the fourth output of the storage unit, the high-order output of the last register is connected to the second input of the first register, the third and fourth inputs of each register are the third and fourth inputs of the storage unit, respectively.