前苏联专利SU1605936A3 System for controlling data transmission line

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专利摘要:
The transmission line control system according to the invention is capable of disconnecting and reconnecting a terminal communication apparatus (S1,S2..S1) from and to a main transmission line (L) reliably and quickly on such occurrences as a fault on the line, correction of the fault, and cutting off and turning on of a power source. The control system includes, for each terminal communication apparatus, two subsidiary communication lines (M1,M2), a by-pass (BPj), two signal monitoring devices (W1,W2), and four change-over switches (C,-C4). Each signal monitoring device monitors a data signal passing through the subsidiary transmission lines and controls the switching operation of the change-over switches so that, upon occurrence of a line fault or a disconnection of the power source, only the terminal communication apparatus related to the trouble is disconnected from the main transmission line and that, upon correction of the line fault or turning on of the power source, that terminal communication apparatus is reconnected to the main transmission line. In order to perform such control operation properly, constants deciding the lengths of time of operation of the signal monitoring devices are determined to satisfy given inequalities.
公开号:SU1605936A3
申请号:SU843781146
申请日:1984-08-10
公开日:1990-11-07
发明作者:Ихара Сусуму；Цунода Синдзи
申请人:Сумитомо Электрик Индастриз, Лтд (Фирма)；
IPC主号:

专利说明:

the cannons of the switches 7-9 are entered into the transmission line 1 by the CB 3. and a normal state is formed for the transmission of information. At the reverse position of the switches 7-9, the CB 3 is disconnected from the transmission line 1 without disturbing its operation. In steady state, transmission line 1 is operating normally. The signal blocks, - 6 and 10, continuously receive signals from transmission lines 1 and 12, respectively. When shmaemoy signal consists of the sum of signals from all CB 3, which continuously receive signals. If the reception of signals is interrupted and the supply of signals to the signal
blocks 6 and 10 at the moment when the level of their code signals is high, this level decreases during the time of continuous absence of the input signal, and the output signals are constantly kept at a high level. A data signal passing through transmission line 1 enters the KB
3 through transmission line 11, and the signal from CB 3 is transmitted to transmission line 1 through transmission line 12. The goal is achieved by introducing PDB 4. The system status is shown with the power supply turned on and off and with damage to the transfer lines. 1 hp f-ly, 9 ill.
The invention relates to signal transmission systems, specifically to the topics of control of the information transmission line.
The purpose of the invention is to increase the reliability and simplify the control system.
FIG. 1 shows a block diagram of an annular information transmission line; in fig. 2 - electric structural diagram of the information transmission line, having the configuration of a wire; in fig. 3 - structural-electrical circuit diagram of the information transmission line management system; in fig. 4 - the state of the information transmission line control system with the power supply disconnected ;; in fig. 5 shows the state of the information transmission line control system, the power supply switching on; in fig. 6 shows the state of the transmission information management system when the damage occurred in the input transmission line above the first signal block; in fig. 7 shows the state of the information transmission line control system when the damage occurred in the output transmission line above the second signal unit; FIG. 8 shows the state of the information transmission line management system on the side of the terminal communication equipment; in fig. 9 - the state of the control system of the transmission line of information: atsi in case of damage on the side of the information transmission line.
The information transmission line control system contains information transfer line 1, connection unit 2 (in Fig.1.2 p-units 2), communication unit 3 (in Fig. 1, 2n communication units 3), block 4 of terminal equipment, switch 5 the first signal unit 6, the first 7 and second 8 switches, the third switch 9, the second signal unit 10, the input transmission line 11, the output transmission line 12. In addition, a, b points are contact points of switches.
The information transmission line control system works in the following way.
Shown in FIG. 3, the information transmission line control system is intended for use with each of the n switching units 3. Since all communication units 3 are identical, it suffices to describe the operation of the information transfer control system for one communication unit 3. The first 6 and second 10 signal units are located in unit 4 terminal equipment and on the transmission side in block 2, respectively
The main function of the first and second signal blocks 6 and 10 is to increase the output level when the signal is received for a predetermined period of time, lower the output level if no signal is received for a predetermined period of time, and continuously increase the output level signal for a predetermined period of time after power
power source. The set period of time can be changed on site during the operation of the proposed information line control system,
If the first 7, second 8 and third 9 switches are closed, as shown in FIG. 3, then the communication unit 3 is entered into the transmission line 1, the normal state for the transmission of information is formed. In the reverse position of the first 7, second 8 and third 9 switches (Fig. 3), the communication unit 3 is disconnected from the transmission line 1 without disturbing the operation of the information transmission line 1. After the first and second 7 signal blocks have been generated by the output signals, the first 7 and third 9 switches are in the state shown in FIG. 3
If there are no output signals, then the first 7 and third 9 switches 7 and 9 are in a state that is the opposite of the states shown in FIG. 3
The first 6 and second 10 signal blocks have preset switches that are typically in the open state. After elimination of the malfunction, the specified switches are manually closed to restore the normal state of transmission line 1.
In steady state, transmission line 1 is operating normally. The first signal unit 6 continuously receives signals from the information transmission line 1, the second signal unit 10 receives signals from the output transmission line 12. The received signal is the sum of the signals from all communication units 3 that receive signals continuously. Under certain conditions, the reception of signals can be interrupted. This establishes an upper limit T for the duration of the continuous absence of a signal, which is determined by the design features of the system. T1 and T2 - the duration of the time of continuous absence of the signal necessary to reduce the level of the output signals of the first 6 and second 10 signal blocks. If the cessation of signals to the first 6 and second 10 signal ceases
five
0
blocks at the moment when the level of the output signals of these blocks is high, then the level of the output signals of the first 6 and second 10 signal blocks decreases in the case of a continuous absence of an input signal in the first 6 and second 10 signal blocks during T1 and T2, respectively.
Q In this case, the condition T1 T2 T must be fulfilled. In a steady state, even if the number of data signals decreases or the reception of signals stops, the indicated condition is fulfilled, i.e. The first 6 and second 10 signal blocks constantly maintain the output signals at a high level, and the first 7 and third 9 switches remain in position, as shown in FIG. 3. A data signal passing through transmission line 1 is supplied to communication unit 3 via input transmission line 11. The signal from communication unit 3 is transmitted
5 to transmission line 1 via output line 12.
When the power supply of the communication unit 3 and the unit 4 of the terminal equipment is disconnected, the immature unit 3 stops the data signal and does not receive signals. Switch 5 is turned off, i.e. a connection is made along the output line 12 to the ground (this state is shown in Fig. 4a). Since the power source of unit 2 does not depend on the power source of unit 4 and communication unit 3, the second signal unit 10 continues operation. Since at the moment the output line 12 is grounded, the second signal unit 10 does not accept the data signal. After fixing the fact of the continuous absence of a signal for a period of time T2, the output signal of the second signal unit 10 is; the position of the first 7, second 8, and third 9 switches. This state is shown in FIG. 4b. At present, the communication unit 3 is disconnected from the transmission line 1, while the normal exchange of signals continues between the other communication units. The first signal unit 6 located below does not receive a data signal from the moment the power supply is turned off. Since condition T1 T2 is fulfilled, the level of the binary signal preceding the signal5
0
five
0
Blocks 6 and 10 remain as high as in the case of a steady state. If the signal is absent for T2, then the foregoing (its signal unit 10 lowers the level of the E; S - Running signal. In the communication unit 3 in which the power source is in the off state, the input 11 and output 12 lines are not connected). from the transmission line 1, simultaneously connected to each other through the second switch 8 in such o6-) az so that they can be used for testing purposes and
1st.
i The line control system transmitted information in the event that the power supply of the terminal was turned on after the condition shown in FIG. 46, works as follows. The first signal unit 6 maintains the output signal at a high level for a period of time T1 from the moment the power source is turned on, and the diverter 5 closes at the contact point b. FIG. Figure 5 shows the state that is formed in the system immediately after the power source is turned on.
I
After power on
Communication unit 3 starts the data signal. B. In this case, the data signal from the communication unit 3 passes a switch to two positions (contact point a and through the second switch 8 (contact point b)) and then returns to the first signal unit 6 from the input line 11.
The first signal unit 6 confirms the fact that the signals are continuously received during a period of TK or longer. Therefore, the first signal unit 6 is put into a steady state and maintains the output signal at a high level, and also keeps switch 5 closed at the contact point q. This becomes possible due to the condition
T4 TK,
where TK and T4 are the duration of the continuous presence of the signal necessary for the level of output of the signals of the first and second signal blocks, respectively; veteran;
15 and T6 are the duration of holding the output levels of the first and second signal units at the moment the power source is turned on.
If the route from block 3 to the first signal block 6 (this route passes through the output line, the second switch 8 and the input line 11 has some open or disconnected circuit, then the first signal block 6 does not receive any data signal (the first signal block 6 not restored to steady state. However, for a period of time T5, the output signal of the first signal unit 6 is kept at a high level. After restoring the steady state of the first signal unit 6, the level of its output signal can t held high for an indefinite time that is longer than the time period T5. Consequently, by monitoring the output signal of the first signal unit 6, it is possible to check the continuity of the route: output line 12 — second switch 8 — input line 11. With the help of the second signal It is possible to distinguish between normal and abnormal system states in block 10. In this case, it is necessary to use the relationship, which is expressed through the inequality T4 T5. If the specified route is in order, then the first signal unit 6 is restored to a steady state, and in this case, even after the expiry of the period T5, the output signal of the first signal unit 6 remains high and the switch 5 remains closed at the contact point a. In this case, the second signal unit 10 confirms the fact that data signals from the communication unit 3 have been continuously received for a period of T4 or longer. After that, the signal level of the second signal unit 10 is lowered, and the switches 7-9 are closed at the contact point a. Communication unit 3, input
transmission line 11 and output line 12 are connected to transmission line 1. If the route: output line 12 - the second switch 8 - input line 11 is broken, the data signal is not received in the first signal block 6, in this case the first signal block 6 lowers its signal level after a period of T5, and the switch connects the additional output line 12 to the ground. Since the data signal to the second signal unit 10 is stopped during the period which is shorter than the time period T4, the output signal of the second signal unit 10 remains at a low level.
Thus, the switches 7-9 remain closed to the contact TOCCHI b. Those. in the event of a fault in the route: output line 12 - the second switch 8 - input line 11 and in the case of switching on the power supply, the signal blocks 6 and 10 are restored to the state shown in FIG. 4b, and this occurs after a time T5. In this way, a violation of the normal operation of the communication unit can be detected by the behavior or state of the first signal unit 6. In the event of a violation, this unit will not be reconnected to transmission line 1.
One example of a fault is the disconnection of the input 11 and output 12 lines, respectively. Consider the case of the operation of the information transmission line control system when a disconnection above the first signal unit 6 occurred in the input line 11 (Fig. 6a).
As a result of disconnection or collapse in the said line, the data signal from the transmission line 1 is interrupted. The first signal block 6 detects the fact that during the entire period T1 no input signal was received. In this case, this block closes switch 5 to the contact point b (Fig. Bb), thereby connecting the output line 12 to the ground. Consequently, there is no signal to the output line 12 and the line below it.
If signals are interrupted on the output line 12 and on the line, the
position below the output line 12, then in this case no signal arrives at the second signal, block 10, which records the fact that there are no signals during 12. The same block closes the switches 7-9 to the contact points b, i.e. sets them to bypass or bypass mode, which is shown in FIG. 6c.
Thus, the terminal directly associated with the malfunction has been disconnected from the transmission line 1, which continues to function normally.
As an example of the system response in the event of a second fault, consider the situation (Fig. 7a) that occurs when disconnecting or breaking in the output line 12, located above the second signal unit 10.
As a result, the signal supply is interrupted in the specified line, the second signaling bdc 1 and the subsequent first signaling unit 6 no longer receive any signals. Since T1: T2, after the period T2 has elapsed, the second signal unit 10 of the switching equipment closes switches 7-9 to contact points b in order to set the indicated switches to bypass or bypass mode (this situation is shown in Fig. 76).
0
5 Q
five
As a result, disconnection from the transmission line 1 of the switching unit 3, which is directly connected with the break, occurs, and the transmission line 1 itself continues to function normally and ensures the normal flow of data signals to the subsequent first signal unit 6.
The first signal unit 6 detects the fact that the signals have stopped during the period T1 and immediately sets the switch 5 to the mode of interruption of the signal (closes this switch to the contact point B. This situation is shown in Fig. 7c.
The malfunction involved includes a break or disconnection in the output line 12 up to the connection point of the input of the second signal unit 10 and the output line
12 and some defect or malfunction in the communication unit 3.
Troubleshooting on the side of the terminal q6opyMOBaHHH communication is carried out as follows (we take into account that the described Faults have already been eliminated). After the completion of the operation to eliminate the fault | equality, the operator manually closes the switch | previously set to the limit mode of operation of the switch | switch of the first signal fuse 6.
I During the period T5, the first signal 5 1 | terminal unit 6 raises the output from the | ignal to a high level and ensures the closure of the moving contact of the switch point 5 at the contact point a. The signal from communication block 3 is received by the first signal block 6.
: Since T5 is TZ, after a period of time TK, the first signal block 6 is set to stable State and can maintain its output signal at a high level. : If there are no other irregularities, then at the confluence of the time period TA, the second Signal block 10 boosts its signal block 10 increases its signal to a high level, Switch; - y and 7-9 are closed to contact points a, thanks to why the communication block connected to transmission line 1, 35 The first and second signal blocks 6 and 10 are restored to a steady state (this state is shown in Fig. 8b).
If in this case there is a fault, then during the period of time T5, the output signal of the first signal unit 6 is at a high level, even after the expiration of the indicated
25
breaks and disconnections in the input iT and output 12 lines, as well as faults in the communication unit In case of any of the above defects and in case of repeated connection of the terminal communication equipment to the transmission line 1, it stops normal transmission systems operation in other lines system. The condition T4 T5 is introduced to exclude the occurrence of such double accidents.
The troubleshooting on the side of the information transmission line is as follows.
After elimination of the considered malfunctions, the normal functioning of the whole system is restored as a result of the connection unit operation. The considered operations are accomplished by manually turning on a pre-set for a particular mode of operation of a switch that is included in the second signal unit 10.
In the case of a pre-set switch set, the second signal unit 10 during its period T6 keeps its output signal at a high level, and the first second and third switches are output from the closure state to contact points b (bypass mode) to the closure state contact points a. This state is shown in FIG. 9a. .
Since T6 TZ, during the TZ period, the first signal unit 6 captures the continuous input of the data signal and increases the level of its output signal.
Switch 5 switches from closure to contact point b on per
period of time, the first signal unit45 clogging with a contact point a. it
The state is shown. In FIG. 96. The first signal block 6 is restored to a steady state.
6 is not restored to its original state. Further, since the state of the second signal unit 10 does not change, the first 7, second 8 and third 9 switches remain in the bypass mode. Therefore, said KONtMyiuiKaa tion unit 3 is not reconnected to transmission line 1, and this fact indicates that the damage remains uncorrected.
Among the other faults that can be detected by the described method are, first and foremost.
Yu
5 20
30 35 40
25
breaks and disconnections in the input iT and output 12 lines, as well as faults in the communication unit 3. In case of any of the above defects and in case of repeated connection of the terminal communication equipment to the transmission line 1, the normal transmission systems cease to work x system. Condition T4 T5 is introduced in order to exclude the occurrence of such double accidents.
The troubleshooting on the side of the information link is as follows.
After the elimination of the considered malfunctions, the normal functioning of the entire system is restored as a result of the operation of the connection unit 2. The operation in question is accomplished by manually turning on the pre-set for a particular mode of operation of the switch, which is included in the second signal unit 10.
In the case of a preset switch being closed, the second signal unit 10 during the period T6 holds its output at a high level, and the first, second and third switches are output from the circuit to contact points b (bypass mode) to the circuit to contact points but. This state is shown in FIG. 9a. .
Since T6 is TZ, during the period of TZ, the first signal unit 6 captures the continuous arrival of the data signal and increases the level of its output signal.
The switch 5 switches with a closure to the contact point b to a closure with contact point a. it
The state is shown. In FIG. 96. The first signal block 6 is restored to a steady state.
After closing the switches 7-9 to the contact points a and until the closing of the switch 5 to the contact point a, i.e. during the time period of the TOR, signals are interrupted at the bottom of the system (below the switches mentioned).
Since at this moment the switch 5 is closed at the contact point a, the data signal enters the second signal unit 10. After detecting
by the second signal unit 10 of the fact that over a period of time T4, the signals are continuously received, said unit goes into a steady state.
Since the duration of the TB period is longer (TK + T4), this steady state becomes strong and stable during the normal operation of the system.
In the event of a fault, the information line control system operates as follows.
If there is a break in the input line 11, then the first signal unit 6 is not restored to a steady state even after closing the switch that is preset to a certain operation mode, which is located in the second signal unit 10. Therefore, the turn line 12 remains connected to the driver. The second signal unit 10 is not restored to a steady state, and after the time period T6 has expired, it lowers its output level: in this case, the first 7, second and third 9 switches return to bypass mode. In order to exclude the probability of the shutdown of the first signal unit 6 of the next terminal communication equipment, it is necessary to achieve the condition TB.
I
If any malfunction has
a place in the communication unit 3 or in the output line 12, then the first signal unit 6 is restored to the steady state, however the second signal unit 10 is not restored to the steady state. In this case, after a period of time Tb has elapsed (from the moment of closing the preset to a certain operation mode of the switch, B in the circuit of the second signal unit 10), the switches 7–9 are closed to contact141e points b.
In this information line control system, the control signal is not used, and various changes in the state of the transmission line affect a specific part of the circuit and do not adversely affect the rest of the circuit.
n
five
about 5 0
Q j p
five
The invention can be used in all linear information transfer lines.

权利要求:
Claims (1)
[1]
Invention Formula
one . An information transmission line management system comprising serially connected via an information transmission line and connecting units of n communication units, characterized in that, in order to increase the reliability and simplify the control system, n units of terminal equipment are introduced, the first output of each of which is connected to the input the corresponding communication unit, the second output of each of the n connection units is connected to the first input of the corresponding terminal equipment unit, the second input of which is connected It is not connected to the output of the corresponding communication unit, and the second output is connected to the second input of the connecting unit, each of the n blocks of the terminal equipment is designed as a switch, the first signal unit whose input is connected to the input of the corresponding communication unit, the output is connected to the switching contact of the switch whose break contact is connected to the output of the communication unit, a. the closing contact is connected to a common bus, each of the n connection blocks is made in the form of a first switch, the switch of which is connected to the input of the information transmission line, the second switch and the third switch, the switching contact of which is connected to the output of the information transmission line, the second signal unit, the output of which is connected to the combined control inputs of the first, second and third switches, and the input is connected to the integrated closing contact of the second switch and the breaker to ontact the third switch, the closing contact of which is connected to the closing contact of the first switch, the input transmission line, whose input is connected to the combined opening contact of the first switch and the second contact of the second switch, and the output connected to the input of the first signal unit, the output transmission line, whose input is connected to the output of the first signal unit, and the output is connected to the input of the second signal unit, while the duration of the operation of the first and second signal units ave to satisfy the ratio m
T4; T5 TZ; ,
de T1 and T2 T
the duration of the continuous absence of a data signal in the first and second signal blocks, respectively; maximum time of no data signal in operating conditions;
FIG.
,;
TZ and T4 - the duration of continuous reception of the data signal in the first and second signal blocks, respectively; T5 is the duration of retention of the output signal levels of the first signal unit. 2, System pop, 1, characterized in that the response times of the first and second signal units satisfy the relations TI T1;
T6: TK + T4,
where T6 is the duration of retention of the output levels of the second signal unit.
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同族专利:

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KR850002722A|1985-05-15|

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US4623884A|1986-11-18|

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法律状态:

优先权:

申请号 | 申请日 | 专利标题

JP58147408A|JPS6038950A|1983-08-11|1983-08-11|Transmission line control system|

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