SU1425719A2 - Wiring check system - Google Patents

Description

The invention relates to automation and computing technology, can be used when testing electrical lines for short circuits, interruptions or incorrect connections, in particular, when checking and marking multi-conductor cables, and is an improvement of the invention according to the author. No. 1-221663.

The purpose of the invention is to demonstrate the reliability of control by detecting and registering a channel closed to the body.

Fig. 1 shows a functional diagram of the main and auxiliary control devices of the system; Figures 2 and 3 are diagrams of a control unit for the output and pulse shapers of the corresponding figure in Fig. 4 - a functional diagram of the detection and fixing unit to the short circuit; Figures 5 and 6 are diagrams of the mode setting switch and the initial state setting block, respectively.

The system consists of two (main and auxiliary) devices, each of which contains (Fig. 1) an output block, a generator 2, an output control block 3, a register 4, a second 5 and a first 6 counters, a first decoder 7, a first trigger 8, an element 9 srazneny, the second decoder 10, the unit (detachable connector) 11 interface with the object of control, the first element is NOT 12, the first 13 ,. the second 14 and third 15 elements and the second element NOT 16, the element (switch) AND-OR 17, the control signal combining unit 18, the control signal branching unit 19, the first element OR 20, the quarter 21 and the eleventh 22 AND elements, the third trigger 23, the second element OR 24, the ninth element AND 25, the fourth shaper 26 pulses, the fourth trigger 27, the eighth 28 and the tenth 29 elements AND, the fourth element NOT 30, the fifth shaper 31 pulses, the fifth trigger 32, the seventh element And 33, the first driver 34 pulses, the initial state setting block 35, the sixth And lement 36, the second pulse shaper 37, a fifth AND gate 38, the second flip-flop 39, the third pulse generator 40, the third element is not 41, the mode switch 42 and the detecting unit 43 and fixing short circuit.

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The output control unit 3 comprises (FIG. 2) an oscillator 44, an AND element 43, a counter 46, and a trigger 47.

The formers 26, 31, 34, 37, and 40 contain (FIG. 3) the element E 48, the counter 49, and the trigger 50.

The short circuit detection and fixation unit 43 contains (FIG. 4) the element AND 51, the trigger 52 and the short circuit indicator lamp 53.

The mode switch 42 contains (FIG. 5) a toggle switch, which has two groups of contacts 54 and 55, including the main or auxiliary mode of operation of the device.

The initial state setting unit 35 contains (Fig. 6) a button 56, by pressing which the trigger 32 is transferred to the initial state.

The cycle of operation of block 3 begins with the arrival of a signal at the single input of the trigger 47. Here, pulses from the output of the generator 44 through the element 45, to the other input of which the output of the trigger 47 receives the resolving potential, enter the input of the counter 46, which forms a sequence of signals, alternately stimulating each of the in, outgoing tires. The last signal of the counter 46 sets the trigger 47 to the state of logical zero, which prohibits the passage of pulses from the output of the generator 44 to the input of the counter 46.

Shapers 26, 31, 34 and 40 are a discrete time delay device that is synchronized. signals from an external pulse generator.

The control signal combining unit 18 can be implemented in the form of a diode assembly with common cathodes, and the control signal branching unit 19 can be implemented in the form of a diode assembly with combined anodes.

The system works in the following way.

The system is used to mark and test stranded cables, with cables with ends distant from each other. For testing such dogs, two devices are used, one of which is connected to one end of the cable and turns on the auxiliary mode, and the other is connected to the other end of the cable and turns on in the main mode.

With the inclusion of power supply installed in both devices

The triggers 27 are set to one state. Then, using the button located in the main device block 35, all the flip-flops and counters of this device are reset to their original state. The signal from the output of the switch 35 is also fed to the input of the block 43, which in the presence of at least one of the zero level channels at the moment of the signal of the initial state, which should not be present during normal operation, is detected by its presence. After that, the block A3 blocks the effect of this signal on the main device and after switching on by the switch 42, switches to the closed channel search mode. If there is no closed channel, the first cycle of device operation begins.

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the impulse of the initial state sets the falling edge of the trigger 32, to the zero state, thereby prohibiting the button 35 of the next to appear, the appearance at the output of the AND 28 element, the impulses of the original State. This signal through the element OR 24, and block 19, enters the highway. From the highway, it is separated by blocks 18, and IS, and is fed to the inputs of elements And 25 and 25j, on the other inputs of which the signal from the outputs of drivers 26 and 262 is present. Elements 25 and 25 in this case form a pulse resetting the counters and triggers of both devices. Impulse formaros

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from the installation in the main device (index 1) of the trigger 32, into the unit by block 35,. The main mode corresponds to a single signal at the output of the switch 42, which arrives at the input of the imaging unit 40 and causes it to be uncontrolled after a certain time interval to overload the synchronization pulses.

The first synchronization pulse from the output of the forniertel 40 "is transmitted through the element OR 24 and block 19 to the channels of the main line of the controlled points of the device. The main device, besides block 19, is connected to the trunk by specifying the keys to the decoder (X coordinate), the interrogation keys of the switch 17, the inputs of the block 18) and through the detachable connectors 11, and 11 2. and, the tested cable is the trunk of the auxiliary device to which connected, respectively, the master keys of the decoder 7, the interrogation keys of the switch 17, the inputs of the block IBj and the outputs of the block 19.

The channel synchronization pulse simultaneously arrives at the inputs of the block 18, and through the detachable connectors 11, and 11, and the controlled cable to the inputs of the block 18g. From the outputs of blocks 18 and 1.8, the synchronization pulses through the elements of E 22 and 22 fall on the inputs of drivers 26 and 265, and with the falling edge I start them.

In the main device, a pulse of the initial state from the output of the imager 26 enters the input of the element E28 ,, and since from the output the triggers trigger 27 and 27, which block the operation of the formers 26 I and 26, j until the end of the current cycle, as well as on the falling edge

the formers 31 are started, and 31. In the auxiliary device, the FTM-pulse from the output of the imaging device 31j is fed to the input element I Z3, to the second input of which through the element

The HE 412 receives a zero signal corresponding to the auxiliary mode of the device. From the output of the AND 33 element, the interrogation signal is unavailable through the OR element 24 and block 19j enters the trunk. From the trunk through the cable being tested, the interrogation link sigal enters the main device mainline, and is taken from it by block 18, from whose output through element 30, enters the input of element 29, to the second input the last potential comes from the output of the switch 42. The first input of the element I 29 is gated by the signal of the imaging unit 31, and if the interrogation signal of the unlinked connection was not picked up from the auxiliary device during the action of the interrogation pulse of the noncoupling, the element I 29 (produces a signal that mouth activates the trigger 23, and the latter turns on the indication lamp. This means that the synchronization pulse did not hit the auxiliary device and did not start the distributor (including drivers 26, 31, 34 and 37). This may be the case when the main and auxiliary devices do not have

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communication channel, i.e. devices are not interconnected by a verifiable cable.

The missing edge of the interrogation impulse Link launches the formers 34, and 342 in both devices. The decoder 7, converts the binary code of the counter 6, into the positional code, opens the first signal by the gate pulse (the key in the main device and delivers Into the corresponding channel of the trunk, the dialing voltage. The decoder 10, which converts the binary code of the counter 5 into the positional code, opens the first interrogation key in the switch 17 of the main device and connects the first channel of the trunk to the output of the switch 17 (.

Since in the first cycle of the pulse distributor, the master decoder 7, and the interrogation switch 17, are connected to the first channel of the trunk, the continuity voltage / present here during the gate pulse travels to the logical network of the switch 17 ,. If, due to a malfunction, there is no signal at the output of the switch 17, or 17 when the counter codes of 6.62 and 5, 5 are equal, 5 is missing, then the AND 15 element generates a switch non-isarability signal and through the first element: WLI 20, starts block 2, which prints the address of the faulty channel, switches 7, 7, 17 and 17,.

The back-edge of the strobe signal starts the drivers 37, and 37 and counters 6 are prepared for switching, and b. In the auxiliary device, the signal from the output of the Shaper 37J is fed to one of the inputs of the element I 38j, the second input of which is opened by the signal of switch 42 passing through the third element HE 41, and the third Bxoh is connected to the output of the connection trigger 39. Thus, the trigger information 39 for the presence of a connection during the action of the interrogation signal is set to the input of the AND 38 element, from the output of which, through the OR 24 element and the node 19j, the signal enters the highway. From the trunk of the auxiliary device, through the detachable connectors 11 and 11 and the cable being tested, the information of the trigger flip-flop 39 enters the trunk

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the main device, where it is allocated by the block 18,, ac of its output enters the input of the AND 36 element, opened with a single signal from the output of the switch 42 ,, If at the input of the AND 36 element, the signal from the output of the former 37 is present, then the information from the output element And 36, is fed to the input of the trigger 39, the presence of a connection. Thus, the trigger information 39 of the presence of the auxiliary device connection during the action of the signal of the formers 37, and 37 enters the main device and is fixed in it by the trigger 39.

However, if the auxiliary device in this test cycle did not apply a test voltage to the inputs of the open key decoder lOj of the question keys, the trigger 39 remains in the zero state and during the main device polling by the Polling signal, the information on the trigger input 39 is not received and does not changes its state. The output signal from the drivers are 37, and 37 is the final signal in the work cycle of the control signal distributor. It is completed by the printing process (if required in this cycle), and also changes the state of the counters 6, and 6, prepares the triggers 27, and 27 to receive the next synchronization pulse

After a certain time interval covering the desync time of both devices, the former 40 generates the main device with the next clock pulse, which starts a new cycle of operation of the control pulses of the devices. At the end of each test cycle, the state of the counters 6 and b increases by one. The process of increasing the state of the counters continues until the counter overflow signal occurs. The decoders 7, and 7 open alternately specifying the keys, first in the main and then in the auxiliary devices, up to. complete enumeration of all master keys of depxfratores 7j and 7 ,. The transfer signal of counters b, and 6 changes the state of counters 5 (and 5, which switch the interrogation key in switch 17, or 17). After the interrogation key is switched, the process of iterating all the master keys repeats. With each pulse f

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Claims (1)

Claim System for control of installation by auto No. 1221663, characterized in that, in order to increase the reliability of control, a short-circuit detection and fixation unit, consisting of a trigger, an And element, and an indicator, is introduced into each control device of the system, the first and second inputs of the And element being connected respectively to the output of the unit setting the initial state and the output of the fourth element is NOT, and the output is connected to a single input of the trigger, the zero input of which is connected to the output of the ninth element And, and the direct output to the third input of the ninth element And and the fourth input at the sixth element AND, the inverse trigger output is connected to the indicator input. Figure 1 142571 9 FIG. 2 FIG. IN FIG. 5 FIG. 6 Loe J. Compiled by W. Werlib