SU1072005A1 - Device for checking correctness of wiring - Google Patents

Description

And are connected to the first control input of the switch, the second inputs of the second and fourth switching elements are connected to the second control input of the switch.

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The invention relates to automation and computer technology and can be used for the production control of electronic equipment.

A device for checking the correctness of the installation is known, comprising switches, registers, decoders, an analysis circuit, a comparison circuit, an input unit, an output unit, an address change circuit and a distribution of C13 pulses.

A disadvantage of this device is the inability to control the desoldering of bifilar cable pairs. Each pair of bifilar cable is an interconnected inductance. When reducing the interconnection between the wires forming a pair, i.e. in the absence of proper twisting of wires, they appear from interference and interference on neighboring wires, which is unacceptable. Normal dialing can not establish the fact of the absence of bifilarity, because with an ohmmeter, which makes a dialing call, you can check only the presence of a galvanic connection and it is impossible to check the presence of an inductive connection between the wires forming a bifilar pair.

The closest to the invention is a device for detecting electrical installation faults containing a galvanic connection register, an input unit, an address register, a control register, a storage unit, a failure analysis unit, and two Coincidence elements 121.

However, the known device has low functionality, i.e. cannot verify the correctness of the desoldering of the bifil &

The aim of the invention is to expand the functionality of the device by ensuring that the desoldering of bifilar pairs of monitored installations is checked, j. The goal is achieved by introducing the first and second generators, the third element AND, the element NOT, the element OR, the switch the level driver, the first and second triggers, the decoder and the delay, the output of the first generator connected to the first and the inputs of all elements And, the output of the second element And connected to The input of the first trigger and the zero input of the second trigger, the unit and zero outputs of which are connected respectively to the second input of the first element AND and to the control input of the display unit, the output of the third element AND connected to the first input of the OR element, the second input of which is connected to the control input devices, and the output - with a single input of the second trigger, the output of the first element And through the delay element connected to control we look for the input of the switch, the first and second information outputs of which are connected to the corresponding the information inputs of the switch, the first and second control inputs of which are connected respectively with single and zero outputs of the first trigger, and the first and second outputs respectively with the first and second inputs of the second generator, the third and fourth inputs of which are connected to the third and fourth information outputs tator, and the output is with the input of the level shaper, the output of which is connected to the second input of the third element AND, and through the elec- tion, NOT to the second input of the second element AND, information VOSODY counts Ic is connected to the corresponding information inputs of the display unit and the decoder, the output group of which is connected to the control inputs group of the switch.

In addition, the device switch contains two OR elements and a circuit of switching elements, with the first information input of the switch connected to the first inputs of the first and second cotation elements, the outputs of which are connected to the first input nepsforo and the second OR element, the second inputs of which are connected respectively to the codes the fourth and third switching elements, the first inputs of which are connected to the second {"1m information input of the switch, the outputs of the first and second elements OR are respectively but the first and second outputs of the switch, the second inputs of the first and third switching elements And are connected to the first control input of the switch, the second inputs of the second and fourth switching elements are connected to the control input of the switch. Fig, 1 shows the structural diagram of the proposed device; in fig. 2 is a switch circuit diagram. The device contains an indication unit 1, a counter 2, a switch 3, the first element and 4, the second element I 5; the counting input of counter 2 is connected to the output of the first element I 4, and the group of information inputs of the switch 3 is a group of inputs of the device connected to controllers b, which are not included in the device, but also shows a dash to explain the operation of the device the third element AND 7, the element OR 8, the first generator Y, the element NOT 10, the first trigger 11, the second trigger 12, the switch 13, the second generator 14, the shaper 15, the de-diffractor 16, the delay element 17, the control input 18 Starting the device, Schlokhod first generator and 9 is connected to the first inputs of all elements AND Qif5 and 73. The output of the second element And 5 is connected to the counting input of the first trigger 11 and the zero input of the second trigger 12, the unit {and zero output of which is connected respectively to the second input of the first element 4 and controlling input unit 1 display. The output of the third element And 7 is connected to the first input of the element OR whose second input is connected to the control input of the device, and the output to the single input of the second trigger 12, The output of the first element And 4 through the delay element 17 is connected to the control input of the switch 3, the first and The second information outputs of which are connected to the corresponding information inputs of the switch 13. The first and second control inputs of the switch 13 are connected to the single and zero outputs of the first trigger 11, respectively, and the first and second outputs s - respectively to the first and WTO {% 1m vhods1mi second oscillator 14. The third and fourth inputs of second-alternator 14 are connected respectively to third and fourth outputs informatsionnsh4I switch 3 and output - with an input of 15 levels. The output of the shaper 15 is connected to the second input of the third element I 7 and through the element NOT 10 to the second input of the second element And 5. The information outputs of the counter 2 are connected to the corresponding information inputs of the display unit 1 and the decoder 16, the output group of which is connected to the control group switch inputs 3. Switch 13 provides for changing the feedback feedback power from connecting one of the wires of a bifilar pair to generator 14. Switch 13 contains the first 19, second 20 elements OR, first 21, W opy 22, third 23, fourth 24 switching elements. Each switching element 21-24 may be implemented, for example; relays, where the control inputs of the relay are connected to the coil of the power supply of the relay, and the input and output of the switching element to the normally open contacts of the relay. When the potential is applied to the control input, the normally open contacts of the relay close and close the input of the switching element with its output. The first information input of the toggle switch 13 is connected to the first inputs of the first 21 and second 22 KOMMTaiyioH elements, the outputs of which are connected to the first inputs of the first 19 and second 20 elements OR. The second inputs of the first 19 and second 20 elements OR are connected respectively to the outputs of the fourth 24 and third 23 switching elements, the Btse inputs of which are connected to the second information input of the switch 13, the outputs of the first 19 and second 20 elements OR are respectively the first and second outputs of the switch. The second inputs of the first 21 and third 23 elements are connected to the first control input of the switch 13. BTOpiie the inputs of the second 22 and fourth 24 switching elements are connected to the second control of the 11 input of the switch 13. Each controlled bifil couple, included in the cable 6, has 4 end. The switch 3 selects one bifillary pair for each control signal at the output of the deflector 16, i.e. connects the two ends of the bifilar pair directly to the second generator 14 ,. and the other two to switch 13. Second generator 14 is a sinusoidal oscillator with transformer inductive feedback. Moreover, the primary winding of such a generator is one of the wires of the test pair, connected directly to the input of the generator 14 of the boiler 3. The secondary winding of the transformer of the generator 14 is the second wire of the test bifilar pair, which is connected to the input of the generator 14 by a switch 3 through a switch 13. In order for the oscillations at the output of the generator 14 to occur unhindered, it is necessary that, on the one hand, the mutual inductance of the bifillary pair of wires should not be lower than the required one, on the other hand, I was keeping the phase balance, i.e. wires that form a bifilar pair must form positive feedback.

A shaper 15 is a unit that rectifies and integrates the voltage from the output of the second generator 14. The shaper 15 produces sinusoidal signals at its output and produces a unit level at the output.

The device works as follows.

After connecting the control cable bifilr cable 6 to the switchboard, the single positive impulse is fed to the device input 18 — the device start impulse, which through the element OR 8 sets the trigger 12 to one state, the unit output of the trigger 12 will allow the passage of the clock signal signal through the first element And 4, the clock signal from the code of the first element And 4 will go to the counting input of counter 2 and change its state to one, Devifter 16 according to the state of counter 2 will choose the number of bifilar pair controlled by abel The signal from the output of the element / element 17 of the delay ocyajecT- shows the connection of the controlled cable to the second generator 14, which is the sensor of bifilness.

It is known that each bifillary pair of wires in the screen sheath has a very weak connection with the adjacent shielded bifilar pair and is two. circuits having inductive and capacitive interconnection using the indicated properties of shielded cable pairs, the second generator 14 (bifilness sensor}, whose oscillating circuits are bifilar cables of controlled cable b, will generate undamped oscillations that will be used by the driver Level 15 detects with and integrates.

Thus, if the pair of wires is connected to the generator from the raenos, bifil {p pairs, electrical oscillations do not occur, the output of the former 15 does not have a positive level of overlap, which indicates either the absence of a soldering pin or to the generator 14 of the tested wires. The absence of a positive level at the output of the driver 15 will cause the signal from the first generator 9 through the AND 5 element, opened by the signal from the output of the element NOT 10, to the counting input trigger 11, which performs switch control 13.

Suppose a trigger 11 (not having an initial installation; a ngisog is in such a state that there is a single potential at its first output, and zero potential at the second (trigger 11 is at one), with the first switching element 21 and the first the OR 19 element of the switch 13 to its first output, and therefore the first information input of the switch 13 will be connected to the first input of the generator 14 and, similarly, through the third coupling element 23 and the second element OR 20 of the switch 13 to its secondary output, and hence, the second information input of the switch 13 will be connected to the second input of the generator 14, when changing the control signals at the input of the switch 13, its second information input 9 will be connected to its first output, 9 to the second output - the first one.

Thus, when the control signals are changed at the input of the switch, at its output, the turn-on of one of the bifil wires of the windings forming a pair will change. If, after this, the generator 14 did not generate undamped oscillations, then the pair of checkers is not bifluid. The zero output of the trigger 12 will allow the indication of the contents of the counter 2 unit 1 indicator. After reading the contents of counter 2 by the display unit 1, the positive potential is applied to the input 18 and the further operation of the CTSa device is oh: y is given exactly as described by Sbtate.

If, however, after changing the direction: the fixed ft to the generator 14 of the controlled bifillary pair, the generator 14 begins to generate sustained oscillations, then at the output of the former 15 there is a unit potential that (through element 7, OR 8) or sets the trigger 12 in one state, if prior to this, the fact of the absence of oscillation of the oscillator 14 was recorded, or it would confirm (the general state of the trigger 12). The cheapest operation of the device occurs as described above.

Thus, the invention permits verification of the correctness of desoldering-beef pairs directly

in the workshop, and not in complex systems, which greatly simplifies and reduces the cost of debugging.

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Claims (2)

1. A DEVICE FOR CHECKING THE MOUNTING CORRECTIONS, containing an indication unit, a switch, the group of information inputs of which is a group of device inputs, the first and second elements of I, as well as a counter, the counting input of which is connected to the output of the first element of отлич, distinguished by that, in order to expand the functionality of the device by ensuring the correctness of the raz-, soldering of bifilar pairs, controlled installation, the first and second generators, the third AND element, the NOT element, the OR element, the switch are introduced into it , a level former, first and second triggers, a decoder and a delay element, moreover, the output of the first generator is connected to the first inputs of all elements And, the output of the second element And is connected to the counting input of the first trigger and the zero input of the second trigger, the unit and zero outputs of which are connected respectively with the second input of the first AND element and with the control input of the display unit, the output of the third AND element is connected to the first input of the OR element, the second input of which is connected to the control input of the device, and the output is unity the input of the second trigger, ^ the output of the first element And through the delay element is connected to the control, the input of the switch, the first and second information outputs of which are connected to the corresponding 'information inputs of the switch, the first and second control inputs of which are connected respectively to unity ”! and zero outputs of the first trigger, and the first and second outputs respectively with the first and second inputs. of the second generator, the third and fourth inputs of which are connected to the third and fourth information outputs of the switch, and the output - with the input of the level former, the output of which is connected to the second input of the third element And and through the element NOT - with the second input of the second element And, the information outputs of the counter are connected to the "corresponding information inputs of the display unit and the decoder, the group of outputs. which is connected to the groups oh control inputs of the switch. 2. The device according to π. 1, characterized in that the switch contains two OR elements and four switching elements, the first information input of the switch being connected to the first inputs of the first and second switching elements, the outputs of which are connected to the first inputs of the first and second OR elements, the second inputs of which are connected respectively the outputs of the third and fourth switching elements, first inputs of which are connected to the second data input ^h switch, outputs of first and second OR elements are sootvets venno first and second switch outputs, second inputs of first and third elements of the commutation and are connected to a first switch control input, the second inputs of the second and fourth; addition of switching elements connected to the second control input of the switch.