SU1003379A2

SU1003379A2 - Device for transmitting bipolar telegraphy signals

Info

Publication number: SU1003379A2
Application number: SU813333728A
Authority: SU
Inventors: Юрий Кузьмич Гришин
Original assignee: Предприятие П/Я В-8835
Priority date: 1981-09-03
Filing date: 1981-09-03
Publication date: 1983-03-07

Description

Изобретение относитс - к телеграфии .The invention relates to telegraphy.

.По основному авт. св. № 930730 известно устройство дл передачи бипол рных телеграфных сигналов, содержащее блок управлени , первый выход которого подключен к первому входу первого коммутатора, первый выход которого соединен с первым входом второго коммутатора и с первым выводом резистора, второй вывод которого подключен к первому выводу диодного моста, второй вывод которого соединен с вторым вьоходом первого коммутатора и с вторым входом второго коммутатора, третий вход которого соединен с вторым выходом блока управлени , третий выход которого соединен с положительным выводом источника питани и с первым выводом фотоприемника оптрона, анод светодиода которого соединен с третьим выводом диодного моста, четвертый .вьдаод которого соединен с катодом светодиода оптрона, а также элементы задерхчки и элементы И, причем четвертый выход блока управлени подключен к отрицательному выводу источника питани , формирователи одиночных импульсов, блок пам ти.According to the main author. St. No. 930730, a device for transmitting bipolar telegraph signals is known, comprising a control unit, the first output of which is connected to the first input of the first switch, the first output of which is connected to the first input of the second switch and to the first output of the resistor, the second output of which is connected to the first output of the diode bridge, the second terminal of which is connected to the second input of the first switch and to the second input of the second switch, the third input of which is connected to the second output of the control unit, the third output of which is connected to A positive output of the power supply and the first output of the photoreceiver of the optocoupler, the anode of the LED of which is connected to the third output of the diode bridge, the fourth output of which is connected to the cathode of the LED of the optocoupler, as well as the elements of the upper surface and the elements And, the fourth output of the control unit is connected to the negative output of the power supply , single pulse shapers, memory block.

сумматор, пороговые блоки и индикатор , первый вход которого соединен с выходом первого элемента И, первый вход которого соединен с выходом первого порогового блока/ с первым входом второго элемента И и с вторым входом индикатора, третий вход которого соединен с выходом второго элемента И, второй вход ко10 торого соединен с выходом второго порогового блока и с вторым входом первого элемента И, третий вход которого соединен с первым входом третьего элемента И, с входом перво15 го элемента задержки и с первым входом блока управлени , второй вход которого соединен с третьим входом второго элемента И, с входом второго элемента задержки и с первым входом adder, threshold blocks and indicator, the first input of which is connected to the output of the first element And, the first input of which is connected to the output of the first threshold unit / with the first input of the second element And and to the second input of the indicator, the third input of which is connected to the output of the second element And, the second the input of which is connected to the output of the second threshold unit and to the second input of the first element I, the third input of which is connected to the first input of the third element I, to the input of the first delay element and to the first input of the control unit, the second the input of which is connected to the third input of the second element I, to the input of the second delay element and to the first input

20 четвертого элемента И, второй вход которого соединен с первм входом сумматора и с выходом первого блока пам ти, вход которого соединен с выходом п того элемента И, первый вход 20 of the fourth And element, the second input of which is connected to the first input of the adder and with the output of the first memory block, the input of which is connected to the output of the fifth And element, the first input

25 которого соединен с вторыг- выводом фотоприемника оптрона и с первым входом шестого элемента И, выхот которого подключен к второму входу второго блока пам ти, выход которого 25 of which is connected with the second output terminal of the photodetector of the optocoupler and with the first input of the sixth element I, the output of which is connected to the second input of the second memory block, the output of which

30 соединен с вторым входом сумматора30 is connected to the second input of the adder

и с вторым входом третьего элемента И, выход которого соединен с выходом четвертого элемента И и с первым входом третьего порогового блока второй вход которого соеди2)ен с первым выходом фотоприемника оптрона и с первым входом первого порогового блока второй вход которого соединен с выходом сумматсГра и с пе:рвым входом второго порогового блока, второй вхо которого соединен с выходом третьего порогового блока, причем выход первого элемента задержки через первый формирователь одиночных импульсов подключен к второму входу шестого элемента И, а выход второго элемента задержки,через второй формирователь одиночных импульсов подключен к второму-входу п того элемента .1.and with the second input of the third element I, the output of which is connected to the output of the fourth element I and to the first input of the third threshold unit whose second input is connected to the first output of the photoreceiver of the optocoupler and to the first input of the first threshold unit whose second input is connected to the output of summatGr and ne: with the first input of the second threshold unit, the second input of which is connected to the output of the third threshold unit, with the output of the first delay element being connected through the first driver of single pulses to the second input of the sixth element And, and the output of the second delay element, through the second single pulse generator, is connected to the second input of the fifth element .1.

Однако устройство обладает недостаточной достоверностью передачи. However, the device has insufficient reliability of transmission.

Цель изобретени - повышение дос товерности передачи.The purpose of the invention is to increase the reliability of the transmission.

Дл достижени поставленной цели в устройство дл передачи бипол рных телеграфных сигналов введены дополнительные формирователи одиночных импульсов, элементы задержки, элементы И, пороговый блок, а также компаратор, счетчики, масштабный усилитель, фильтр верхних частот, дополнительный фотоприемник, оптически св занный с светодиодом оптрона , первые выводы дополнительного и основного фотоприемников объединены, второй вывод дополнительного фотоприемника через фильтр верхних частот подключен к входу масштабного усилител , выход которого подключен к первым входам первого и второго дополнительных элементов И, выходы которых объединены и подключены к первому входу дополнительного порогового блока, второй вход которого соединен с первыми выводами обоих фотоприемников, выход дополнитёльного порогового блока подключен к первому входу компаратора, второй вход которого подключен к первому входу третьего порогового блока, выход компаратора подключен к первым входам третьего и четвертого дополнительных элементов И, второй вход третьего дополнительного элемента И соединен с первым входом блока управлени , с входом первого дополнительного элемента задержки и с первым входом первого счетчика, второй вход четвертого дополнительного элемента И соединен с вторым ВХОДОМ блока управлени , с входом второго дополнительного элемента задержки и с первым входом второго счетчика, второй вход которого подк .пючен к выходу третьего дополнительного элемента И, выход четвертого дополнительного элемента И подключенTo achieve this goal, additional single pulse shapers, delay elements, AND elements, a threshold unit, as well as a comparator, counters, scale amplifier, high pass filter, an additional photodetector optically coupled to an optocoupler, were introduced into the device for transmitting bipolar telegraph signals. the first pins of the additional and main photodetectors are combined; the second output of the additional photodetector is connected to the input of a large-scale amplifier through a high-pass filter; Secondly, they are connected to the first inputs of the first and second additional elements I, the outputs of which are combined and connected to the first input of an additional threshold unit, the second input of which is connected to the first terminals of both photodetectors, the output of the additional threshold unit connected to the first input of the comparator, the second input of which is connected to the first the input of the third threshold unit, the output of the comparator is connected to the first inputs of the third and fourth additional elements And, the second input of the third additional element And with one with the first input of the control unit, with the input of the first additional delay element and with the first input of the first counter, the second input of the fourth additional element And is connected to the second INPUT of the control unit, with the input of the second additional delay element and with the first input of the second counter, the second input of which is It is connected to the output of the third additional element And, the output of the fourth additional element And is connected

к второму входу первого счетчика, выходы счетчиков подключены соответственно к четвертому и п тому входам блока индикации, причем выход первого дополнительного элемента заержки через первый дополнительный формирователь одиночных импульсов подключен к второму входу первого дополнительного элемента И,, а выход второго дополнительного элемента задержки через второй дополнительный формирователь одиночных импульсов подключен к второму входу второго дополнительного элемента И.to the second input of the first counter, the outputs of the counters are connected respectively to the fourth and fifth inputs of the display unit, with the output of the first additional lock element through the first additional single pulse generator connected to the second input of the first additional element I, and the output of the second additional delay element through the second additional the shaper single pulses connected to the second input of the second additional element I.

На чертеже изображена структурна электрическа схема устройства.The drawing shows a structural electrical circuit of the device.

Устройство содержит блок 1 управлени , коммутаторы 2 и 3, резистор 4, диодный мост 5, фотоприемник б, светодиод 7, фотоприемник 8, элементы 9 и 10 задержки, формирователи 11 и 12 одиночных импульсов, элементы И 13-18, пороговые блоки 19-21, блоки 22 и 23 пам ти, су.-Матор 24, индикатор 25,- элементы и 26-29, элементы 30 и 31 задержки, фильтр 32 верхних частот, масштабный усилитель 33, пороговый блок 34, формирователи 35 и 36, компаратор 37, счетчики 38 и 39,The device contains control unit 1, switches 2 and 3, resistor 4, diode bridge 5, photodetector b, LED 7, photodetector 8, delay elements 9 and 10, drivers 11 and 12 single pulses, elements 13-18, threshold blocks 19- 21, memory blocks 22 and 23, soo.-Mator 24, indicator 25, - elements and 26-29, delay elements 30 and 31, high-pass filter 32, scale amplifier 33, threshold unit 34, drivers 35 and 36, comparator 37, counters 38 and 39,

Устройство работает следующим образом ,The device works as follows

Claims

In the process of transmitting information to the input terminals 40 and 41, the control signals from the transmitter enter in antiphase, which leads to antiphase switching on of switches 2 and 3, as a result of which bipolar telegraph signals are formed in resistor 4. Due to the presence of a diode bridge 5, the current of each direction of the bipolar signal flows through the LED 7, with the result that signals proportional to the amplitudes of the positive and negative premises appear in the photodetector circuit b and at the first inputs of the elements 17 and 18. The signals arriving at the second inputs of the And 17 and 18 elements, which are formed by the delay elements 9 and 10 and the formers 11 and 12 of the single pulses, provide a sample for storing the amplitudes of the positive and negative premises. The amplitudes of the packages are memorized by memory blocks 22 and 23; memory unit 22 stores the amplitude of the negative premise, memory unit 23 stores the amplitude of the positive premise. The signals from the outputs of memory blocks 22 and 23 are received at the inputs of the adder 24, where the absolute values of the amplitudes of the positive and negative premises are added and this sum is averaged. If in the process of information transmission the average value of the absolute values of the amplitudes of the positive and negative premises is within the permissible limits (exceeding the minimum permissible value), turn on the threshold unit 19 and a high potential appears on its output, which reduces the blocking from the first inputs elements 13 and 14 and includes an indicator element 25 connected to the output of the threshold unit 19. The potential from the output of the adder 24 enters the first input of the threshold unit 20, thereby determining its threshold for triggering the second input y In the process of transmitting information to the second input of the threshold unit 20, through the threshold unit 21, potentials (in accordance with VII with the operation of elements 15 and 16), of course, are proportional to the amplitudes of positive and negative parcels and compared with the potential supplied to the first input of the threshold unit 20 with a total of 24. If in a bipolar signal the amplitudes of the positive parcel are equal to the amplitude of the de negative parcel or they differ by the allowable value, then the threshold unit 20 remains permanently on and blocks the elements And 13 and 14 by other inputs, with the result that the elements of the indicator 25 connected to the outputs of the elements And 13 and 14 remain off. When a significant asymmetry of the parcels appears in the bipolar signal, one of the elements And (13 and 14) will have high potentials on all inputs, and as a result one of the elements of the indicator 25 is turned on, indicating that the amplitude of one of the signals of the bipolar signal exceeds for an unacceptable value, the average value of the amplitudes of the parcels, and the bipolar signal has an unacceptable asymmetry. In addition, during the operation of the device in the circuit of the photodetector 8, optically connected with the LED 7, there are also signals whose amplitudes are proportional to the amplitudes of the positive and negative bipolar signals. The signals from the second output of the photodetector 8 are fed to the input of the filter 32 of the upper frequencies. The filter 32 does not pass the constant component of each of the bipolar bursts, but only filters the high frequency component of each batch (i.e., pulsations of the bursts). When a logical unit arrives at terminal 40, and a delay element 30 is turned on at terminal 41 of logical zero, shaper 35 produces a single pulse, which arrives at. the second input of the element and 26 allows the signal to pass through the first input through the element I 26 during the time of the action of a single pulse. If t (a positive message. Does not contain a variable that is the J factor or the effective value of the variable component is small (for example, if the ripple factor is less than 3%), then the output of the AND 26 signal is either absent or does not have a sufficient value to change the state of the comparator 37, therefore, at its output and the outputs of the elements 28 and 29, the log O, the counters 38 and 39 and the elements of the indicator 25 connected to the outputs of the counters 38 and 39 are turned off if the positive value of the variable component exceeds the permissible value then a variable signal appears from the output of the filter 32 through the scale amplifier 33 and element 26 at the first input of the threshold unit 34. At the output of the threshold unit 34 there is a burst of pulses whose amplitude exceeds the voltage at the second input of the comparator 37 (threshold voltage determined by the amplitude value of the positive parcel), therefore, at the output of the comparator 37 there is also a bundle of pulses arriving at the first inputs of the And 28 and 29 elements. In the input element And 28 there is a log. 1, the pulse train will pass through the element 28 and go to the second input of the counter 39, which will recalculate the number of pulses in the pulse train and will ensure the inclusion of the indicator element 25 connected to the counter output. Measuring the number of pulses during a single pulse allows one to estimate the pulsation frequency. Similarly, the scheme works when controlling pulsations in a negative premise. Only in this case the element 29, the counter 38 and the indicator element 25 connected to the counter 38 are turned on. At that, the counter 39 is set to the initial state by the first input of the logical unit 41 (similarly, the initial 38 is set to the initial state unitP with terminal 40). The scale amplifier 33 normalizes the amplitude of the variable component passing through the filter 32 and compensates for the spread of the transfer characteristics of an optoelectronic pair LED 7 - photodetector 8. The magnitude of the allowable ripple factor of the bipolar signal is set using the threshold unit 34 and can be adjusted using the threshold of the threshold unit 34. The elements 30 and 31 of the delay are necessary to eliminate the reaction of the indicating devices (counters, indicator) on the transient ss when switching the device (when changing the polarity of the parcels). The duration of the pulse generated by the formers 35 and 36 of single pulses must capture a significant part of the corresponding information package in order to ensure the necessary reliability of control of pulsations (or crushing) of a bipolar signal. Thus, during the operation of the proposed device, an automatic current control of the average value of the amplitude of the bipolar signal, asymmetry of parcels, pulsations, and crushing of parcels is carried out. Claims of Invention A device for transmitting bipolar telegraph signals according to aut. No. 930730, characterized in that, in order to increase the reliability of the transmission, additional single pulse shapers, delay elements, AND elements, a threshold unit, and a comparator, counters, scale amplifier, high-pass filter, additional the photodetector optically connected with the LED of the optocoupler, the first outputs of the additional and main photodetectors are combined, the second output of the additional photodetector is connected via a high-pass filter to the input of a large-scale amplifier whose output is connected n to the first inputs of the first and second additional elements And, the outputs of which are combined and connected to the first input of an additional threshold unit, the second input of which is connected to the first terminals of both photodetectors, the output of the additional threshold unit connected to the first input of the comparator, the second input of which is connected to the first the input of the third threshold unit, the comparator is connected to the first inputs of the third and fourth additional elements And, the second input of the third additional element And is connected to the input of the control unit, with the input of the first additional delay element and with the first input of the first counter, the second input of the fourth additional element I, is connected to the second input of the control unit, with the input of the second additional delay element and with the first input of the second counter, the second input of which is connected to the output of the third An additional element And, the output of the fourth additional element And is connected to the second input of the first counter, the outputs of the meters are connected respectively to the fourth and the fifth inputs of the block ka indication, and the output of the first additional delay element through the first additional driver single pulse is connected to the second input of the first additional element AND, and the output of the second additional delay element through the second additional driver single pulse connected to the second input of the second additional element I. Sources of information taken into account during the examination 1. USSR author's certificate 930730, cl. H 04 L 25/26, 1980 (prototype).