SU1764071A1 - Digital information receiving device - Google Patents

Abstract

The invention relates to automation and can be used in petrol filling equipment for communicating equipment located in a petrol station building with peripheral devices that are located at a considerable distance from it. The purpose of the invention is to simplify the device and increase its reliability. The device contains a generator of 1 pulses, counters 2 and 3, decoders 4 and 5, counters-distributors 6 and 7, the elements of OR 8 and 9. 3 Il.

Description

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The invention relates to automation and can be used in petrol filling equipment for communicating equipment located in a petrol station building with peripheral devices that are located at a considerable distance from it.

Electronic devices are known that provide communication between the transmitting and receiving parts of the equipment that are remote from each other.

A device for transmitting and receiving information is known, in which the transmitting side contains a shift register, a control unit, AND and OR elements, K-triggers, D-triggers, NOT elements, a clock generator, a pulse counter, and other elements.

The receiving side of the device contains a shift register, a phasing unit, a buffer register, a matching unit, D-flip-flops, RS-flip-flops, a control switch, a clock generator, AND, OR, NOT elements and other elements.

Disadvantages of the device: setting the scheme for a predetermined number of transmitted pulses; the presence of an external master (synchronizing) pulse.

Closest to the invention is a device containing on the transmitting side an information pulse counter, a first frequency tracking counter, a first comparator, a pause delay trigger, a pause count counter, a first clock generator, and the first AND element, on the receiving side binary-decimal information counters pulses, code converters, second clock generator, second And element, shaper of nanosecond pulses, passed pulses counter, second frequency tracking counter, second comparator and distributor.

In this device, the receiving-side node consisting of the second clock generator, the second element AND, the nanosecond pulse shaper, the elapsed pulse counter, the frequency tracking counter, and the comparator is difficult to configure. During the operation of the device, when the parameters of the elements entering the node change with time, it starts to work unstable, i.e. reliability of its work decreases.

A disadvantage of the device is also the fact that the pause period Tn must be equal to the circulation period Tc of the distributor. If Tp TS, a command may be formed several times to decrypt the information recorded in the counters, and

following her command to reset the counters. In this case, the first zero reset command resets the counters, and the subsequent decryption command writes 5 codebooks to the code converters and memory information. If Tp TC, the commands for decoding and zeroing the counters may not be formed. During operation, devices may change.

0 parameters of the device elements; accordingly, the equality Tp Tc may be violated and the circuit will start to operate unstable.

The purpose of the invention is to simplify the device and increase its reliability.

5 At the same time, the information on the device input should come in a burst of pulses that carry information on the number of counted pulses.

This goal is achieved by the fact that

0 a device for receiving digital information containing a pulse generator, the first counter, the C input of which is the device input, the bits of the first counter are connected to the corresponding

5 information inputs of the first decoder, the outputs of which are the first outputs of the device, the transfer output of the first counter is connected to the C input of the second counter, the outputs of which bits

0 is connected to the corresponding information inputs of the second decoder, the outputs of which are the second outputs of the device, the first distribution counter, the first and second outputs of which

5 are connected, respectively, with the inputs of the decoders and the R inputs of the counters, the second counter distributor and the OR elements are introduced, the output of the pulse generator is connected to the C inputs of the distributor counters, the third output of the first distributor counter is connected to its V input, the output of the second the distribution counter is connected to the first inputs of the first and second elements OR, the outputs

5 of which are connected to the R-inputs of the same-name distributors, the second inputs of the elements OR are connected to the input of the device.

Figure 1 shows the functional

0 device diagram; Figures 2 and 3 are diagrams explaining the operation of the device in the operating and rest modes (when there are no information pulses).

The device contains a generator 1 im5 pulses, the first 2 and second 3 counters, the first 4 and second 5 decoders, the first b and second 7 distributors, the first 8 and second 9 elements OR. 1 also indicates: a transfer signal 10; signals

the first, second and third outputs of the first distributor counter 11-13; output signal of the second distribution counter 14.

In Figures 2 and 3, stress diagrams are named according to the symbols in Fig. 1.

In the operating mode, information from the transmitting side comes in bursts of pulses. At the same time, the number of information pulses in a burst corresponds to the number of pulses counted by the transmitting side by the time when the burst ends. At the receiving side, the number of pulses in a burst should be counted, the end of the burst and the beginning of the pause should be determined, then the counted number from the counters will be rewritten and the counters reset to zero to prepare them for receiving information that will arrive with the next burst of information pulses.

The frequency of clock pulses (TI) must be equal to the frequency of information pulses (AI) or less.

In the operating mode, the device operates as follows. The number of information pulses in a burst is counted by counters 2 and 3. These same pulses keep both distributor counters in their initial zero state, arriving at their input P. From the beginning of the pause, clock pulses (TIs) arrive at the C-in / ods of distributors , promote them. The signal 11 from the first output of the first distributor 6 records information from the counters to the decoders 4 and 5 and the pin in the memory, and the signal 12 from the second output of the distributor 6 zeroes counters 2 and 3, preparing them for receiving the next batch of pulses.

Signal 13 from the third position of the distributor counter 6 will stop its further advancement, having prohibited it, by entering at its input V.

The circulation time of the second distributor counter 7 is usually chosen longer than the pause time; In any case, it should be such that the first distributor counter 6 would not re-form signals 11 and 12 during the same pause.

With the arrival of the next burst, the cycle repeats.

In the quiescent state, there are no information pulses of the AI, in connection with which the clock pulses TI change the state of both distribution counters.

On fig.Z denotes the number of clock pulses, promoting the meter-distributors.

The clock pulse, denoted by 2, generates a signal 11 of log.1 at the first output of the distributor counter 6. This signal 11 issues a command to overwrite the information recorded in counters 2 and 3 into decoders 4 and 5 and further into memory. The clock pulse, denoted by the number 3, generates a signal log. Oh and the signal 12 log. 1 respectively on the first and second

0 outputs of the counter-distributor 6, and the signal 12 resets the counters 2 and 3 to the zero state.

The clock pulse, denoted by the number 4, generates a signal log. O and signal 13

5 log. 1, respectively, at the second and third outputs of the distributor counter 6. Signal 13 at input V prohibits further advancement of the distributor counter 6.

After switching on the power supply, when the information pulses have not yet arrived, a random information is recorded in the counters 2 and 3. If no special measures are taken, it will be displayed.

5 The second distribution counter 7 eliminates this situation. Its output signal 14 resets both distribution counters, and in the second cycle of operation of the distribution counters, the indication will be

Claims (1)

0 null information is written to counters 2 and 3 during the first cycle. Apparatus of the Invention A device for receiving digital information, comprising a pulse generator, the first account of which the C input is the input of the device, the output of the bits of the first counter is connected to the corresponding information inputs of the first decoder, the outputs of which enter the first output of the device, output transfer the first counter is connected to the C-input of the second counter, the outputs of the bits of which are connected to the corresponding information inputs of the second 5 of the decoder, the outputs of which are the second outputs of the device, the first counter-distributor, the first and second outputs of which are connected respectively to the C-inputs of the decoders and R-inputs 0 counters, characterized in that, in order to simplify the device and increase its reliability, the second counter-distributor and OR elements are introduced into the device, the output of the pulse generator 5 is connected to the C-inputs of the distributor counters, the third output of the first distributor counter is connected to its V-input, the output of the second distributor counter is connected to the first inputs of the first and second elements OR, the outputs 717640718 which are connected to the R-inputs, the same names of the elements OR are connected to the input distributor counters, the second devices. W Worker, reessin Packs impulse pause Sy gnul Outlet second account sneeze-distributor flepbbiu breathing perist distributor Pu / P1 J The second b / hud of the first count of a-distributor sh The third by-pass of the counter; distribution of bodies 13 FIG. 2 | pause J /five tfM Reshsm submission The output signal of the second distribution counter 5/0 (5 Ј count h and cob distributors, p p pg nj5 Lerby & Lerboy of the counter-distributor P . p / h p / x second & nd / turn of the dumb counter-allocatef ST 12. Third, the bypass of the counter-distributor Rig. five / 2. R #