SU1270729A1 - Device for checking electric circuits - Google Patents

Description

1 The invention relates to instrumentation engineering and can be used to control the installation and the quality of the insulation of branched cable networks, unprinted boards.  The purpose of the invention is to increase the reliability of the control by eliminating the false rejection of monitored circuits due to the failure of the switch relay.  FIG. 1 shows a diagram of the proposed device; in fig. 2 is a diagram of a control unit for opening.  The device (FIG. 1) contains a switch 1, implemented, for example, on reed switches, first 2 and second 3 inputs of meter 4, switching unit 5, memory block 6, valve 7, valves 8, address register 9, prohibition element 10, combinator 11, generator 12, the input and control unit 13, the first element 14 AND, the third. element 15 OR, opening control unit 16, first element 17 OR, first 18, second 19 and four 20 outputs of input and control unit 13, fifth output 21 of input and control unit 13, first output 22 of memory block 6, first 23, second . 24 outputs of the meter 4, the first 25, the second 26, the third 27, a quarter 28, the sixth 29, five of 30 outputs of the block 16 of the opening control.  Unlock control unit 16 (FIG. 2) contains the second 31, third 32, fourth 33, fifth 34, sixth 35, seventh 36, eighth 37, ninth 38, tenth 39, eleventh 40, twelve 41 elements And, first 425 second 43 and third triggers, the fourth 45, fifth 46, second 47 elements OR, two-digit counter 48, element 49 OR-NOT, element 50 of delay, shaper 5 pulses, first 52 and second 53 indicators.  The input and control unit 13 is connected to the first output 18 with the first input of memory block 6 and the first input of the opening control unit 16, the second output 19 to the first input of the generator 12 and the second input of the block 16 to the third opening, the third output from the first terminals the inputs of the register 9 addresses the fourth output 20 - with the first input of the first element 14 And, the fifth output of 2 G - with the first input of the first element 17 OR and the fifth input of the block 16 of the opening control.  The first and second outputs of the address register 9 are connected respectively to the first valves in the ports 8 and to the first inputs of the distributor 7 connected by the second inputs to the outputs of the corresponding valves 8, the outputs to the second inputs of the memory block 6 connected by the first output to the second input of the generator 12 and with the second input of the first element 17 1SH, the second outputs with the first inputs of the switching unit 5, the second input of which is connected to the output of the first element.  14 And, and the outputs - to the inputs of the switch 1, connected to the first and second pins, respectively, with the first 2 and second 3 inputs of the meter 4, the third outputs with the corresponding terminals for connection are controlled. gh electrical circuits.  The third input of meter 4 is connected to the output of the first element 7 OR, the first 23 and second 24 outputs, respectively, to the fourth and fifth inputs of the opening control unit 16, the first output 25 of which is connected to the first input of the combinator 11 and the third, the generator input 12, the second 26 and the third 27 outputs, respectively, to the first and second inputs of the input and control unit 13, and the fourth output to the second input of the first element 14 I.  The output of the generator 12 is connected to the second) of the register of the address 9, and the outputs of the combinator 11 through the prohibition element 10 to the second inputs correspond to: 1111D x-gates 8.  In block 16 of the control for unlocking, its fourth input is connected to the first inputs of the second 31 and third 32 elements And, the fifth input - to the first inputs of the fourth 33, fifth 34 and sixth 35 elements And, the first and second inputs respectively to the first and second inputs the first trigger 42 connected by the first output to the second inputs of the third 32 and fourth 33 elements And the second output to the second inputs of the second 31, fifth 34 and sixth 35 elements And, the output of the second element 31 And connected to the first input of the second trigger 43 connected by the second input with the third swing unit 16 controlling unlocking, the first output - to a third. the input of the fifth element 34 And with the fourth output of the unlock control unit 16, the second output with the third input of the sixth element 35 And connected with the output to the third output of the opening control unit 16, the output of the fifth element 34 AND connected to the first input of the second element 47 OR , the output of which is connected to the second output of the unlock control unit 16.  The third OR element is connected by the first input to the second output 19 of the input and control unit 13, the second input to the fifth output 30 of the block. 16 of the control of unlocking, and the output with the first input of the prohibition element 10, the sixth output 29 of the block 16 of the control of the opening of the NITCH is connected to the second input of the combinator 11.  In block 16 of the control for unlocking, the output of the third element 32 I is connected to the first inputs of the seventh 36 and eighth 37 elements And, the output of the fourth element 33 And - to the first inputs of the ninth 38, ten, 39, one 40 and twelfth 41 elements And, the outputs of the seventh 36 and nine 38 elements And connected respectively to the first and second inputs of the fourth element 45 OR, the output of which is connected to the input of a two-bit counter 48, the output of the first bit of which is connected to the second input of the tenth element 39 -and the first input of the fifth element 46 OR four to the output of the block 16 of the control of opening, the first input of element 49 ILINE, the output of which is connected to the second inputs of the eighth 37th and ninth 38 elements I.  The output of the second bit of the two-bit counter 48 is connected directly to the second input of the HWN element 49, and through the delay element 50 to the second input of the fifth HH element 46 connected by the output to the second input of the seventh And 36 element, the output of the second bit of the two-digit counter 48 is connected to the output 30 of the unlock control unit 16, to the second input one of the eleventh element 40 I, to the input of the driver 51 pulses connected by the output to the second input of the second element 47 OR, to the first input of the third trigger 44, the second input of which It is connected to the second input of the first flip-flop 42, the first output of the third flip-flop 44 is connected to the second input of the twelfth element 41 I, and the second output to the third input of the ninth 38, tenth 39 and eleventh 40 elements And, the output of the tenth 39, eleventeen ;) of that 40th and twelfth 41 elements AND are connected respectively to the inputs of the first 52 and second 53 indicators and the third input to the second element 47 OR. .  The device (FIG. 1) works as follows.  First, all electrically connected circuits are checked.  During the test, one of the points of each branched circuit is taken for the beginning of the circuit and connected to the input 2 of meter 4, the remaining points of this circuit are connected one by one to the input 3 of the meter 4, checked by the meter 4 for communication relative to the beginning of the circuit and then disconnected.  The beginnings of the circuits remain connected to input 2 and are then used as points of tested disconnected circuits.  The information needed to verify the reported information is received by the program, we enter the input and control unit 13, which generates control commands and, as the device performs the next control operations, enters information to perform the following operations.  In this case, from the input and control unit 13 to the address register 9, signals of the binary bits of the address are received in parallel.  Commands to connect the points to the input 2 come from the output 18 of the block 13 to the block 6 of memory and to the first input of the trigger 42 of the block 16 of the opening control (Fig. 2), which is turned on when the first command connects the first point to input 2 and remains in this state until the transition to the control of disconnected circuits.  Commands to connect the points to input 3 come from output 20 of block 13 through element 14 of Iv block 5 of switching, and from output 19 of block 13, a signal is received that corresponds to the monitoring mode of the circuits, prohibiting the generator 12 from being installed through element 15 OR element 10 is banning.  The address information from the unit outputs of the register 9 addresses goes to the inputs of the distributor 7 directly, and from the zero outputs of the register g, the information addresses go to the inputs of the distributor 7 through gates 8, the second inputs of which through the prohibition element 10 are connected to the outputs of the combinator 11.  In the mode of checking the reported circuits, the outputs of the combinator 11 from the inputs of the valves 8 are disabled by the prohibition element 10, and the address is set only by the registrar 9 of the address. , From the outputs of the distributor 7, the address goes to memory block 6, where, if a point is connected to input 2, it is remembered.  The signal of the corresponding output of the memory block 6 through the switching unit 5 switches on the switch 1 relays, by contacts of which the required point is connected to input 2.  In the case of connecting a point to the input 3, the address from the output of the distributor 7 enters through the PLT unit 6, where it is not stored, to the switch unit 5, from the output of which the address goes to switch 1, where it turns on the relay, by contacts of which the point is connected to Inlet 3.  When checking each chain of communication after connecting the beginning of the circuit to input 2 and the next point of this circuit to input 3, block 13 with a signal from output 19 through the first element 17 1-SHI switches on measurement in meter A and returns it to its original co. This is three ger 43, which was included in the previous measurement.  If there is a message, the HOPA signal from the output 23 of the meter 4 arrives at the first inputs of the elements 31, 32, but the enabling signal from the trigger 42 through the second input is present in yes and only mode at the 3 1 element, therefore, the output appears on it which switches the trigger 43, while allowing the signal from its first output enters the element 35 I input, and the inhibiting signal from its second output liocryiia em to the input of element 34 I and the first input of element 14 II, thereby disconnecting the signal from block 5 input selection 3.  At the same time, the input 3 of the checked point turns off with, the address register 9 continues to store the address of this point, and the meter 4 continues to remain in the metering state.  1Three contact opening is given} 1st relay input 3 meter 4 forms a 55 signal BRACK, which from its output 24 goes to the inputs of elements 33, 34, 35 AND, but since paspemaioui ie signals from other inputs are only present at element 5 and 35 AND then a signal appears at its output, which from output 27 of block 16 is fed to the first input of input and control block 13, which in this case ensures zeroing of address register 9, removes the metering command, and also provides an external program with its external program and writing to register 9 addresses of the new point for connection to input 3 followed by m metering.  When the contact of the relay 3 input sticks, the BRACK signal after NORMA will not measure, the input of a new point will not follow, and register 9 of the address will not be reset and thereby provide an indication of the address of the faulty point. . .  If there is no message.  The first measurement result at this point connected to input 3 is signal I. iPAK that exits 24 meter 4 enters the inputs of elements 33, 34, 35 AND, but in accordance with the state of the second trigger 43, the signal is received at the output of element 34 AND through element 47 47 OR comes from output 26 of block 16 to input unit 3 input and control, which, after fixing the address of this point will ensure the continuation of the control mode.  During the--check, the reported circuits remain connected to input 2 of the beginning of the disconnected circuits.  Gosle checking of the circuits begins checking the disconnected circuits by parallel breaking the circuits into two groups.  In this mode of operation, the address register 9 is in the initial state, and the signal from the output 19 of the input and control unit 13 returns to the initial state the trigger 42, which in this socket remains until the end of the control of the broken circuits, sets the initial state to the trigger 44. which is turned on when detecting a marriage in the control object, and also turns off the prohibition element 10 through element 151 of the control unit, connecting the outputs of the combinator 1 1 through gates 8 to the inputs of the distributor 7.  At the same time, each state of the combinator 11 corresponds to its breakdown into.  two equal groups of output signals of the distributor 7, and all the states of the combinator 11, the number of which is equal to the number of binary bits of the address, ensured that all points of the switch were checked.   In each state of the combinator I1, the address signals from the output of the distributor 7 are received in parallel in memory block 6, from the outputs of which only switch-on addresses of disconnected circuits in the switchable group are received in switch block 5.  Switching unit 5 provides for selected addresses the switching off of input 2 relay and the switching on of input 3 relay, t. e.  switching points from one input to another.  Each time after splitting the chains into two groups, block 13 input. and control the signal from output 21 through element 17 OR includes measuring in meter -4, and also triggers 43 which, later in mode 20, control relay of disconnected circuits does not switch to initial state during measurement.  After the measurement with a polyshapel result, the NORMAL signal of the sensor 4 is fed to the inputs of the TOL 3, 32 I terminals, but since the resolving signal from the second input from the flip-flop 42 is present only at the 32 I element, a signal is output at its output element 37 And, on the second input of which there is a permissive signal, will come from output 25 of the opening control unit 16 through element 15. OR, the combinator 1 shifts the combinator I1 by one step, with the composition Ipynn changing,. pos. What is being measured is new, and so on, until all circuits are fully tested.  In case of a negative result, one of the cycles of group control, the cause of which can be either a defect of the control object or sticking of the contacts of the commator's relay, the signal of the BRAC meter 4 from the output 24 goes to the first inputs of the elements 33, 34, 35 I, but taking into account the presence allowing signals on other inputs only at element 33 And, at its output, turns on a signal that goes to the inputs of elements 38, 39, 40, 41 And, and then r from the output of element 38 And, on the other inputs of which permission signals are present , through element 45 OR will go to the input of two Hub bit counter 48, switching it to state 1.  Yeri, at the output of the first bit of the counter 48, is a single signal that will allow the second input to pass the signal through element 39 AND, will allow through element 46 OR the signals pass through element 36 AND zeroes from output 29 of block 16 to the combinator's obnomu I1, thereby switching all the points of the switch to input 3, prohibits the passage of the signals through the elements 37, 38 I.  Thus, all points of the switch I are connected to input 3, the measurement continues, the control object does not affect the measurement result, since all its points must also be connected to input 3 and must not be connected to input 2.  This mode implements the diagnostics of sticking of the contacts of input 2.  In the absence of sticking contacts at input 2, the BRAK signal will disappear, and the NORM signal will appear, which, having passed through successively connected elements 32, 36 AND AND element 45 OR, will switch the ring counter 48 to state 2.  At the same time, at the output of the second bit of the counter 48, a single signal that allows the second input to pass the signal through element 40 I from the output 30 sets the trip control unit 16 through the element 15 OR element 10 to the ban.  The signal from counter 48 delayed by the delay element 50, passing through the element 46 OR, will allow the passage of signals through the AND element 36, and also after inverting the elements 49 OR NOT, prevents the signals from passing through the elements.  37, 38 I.  Thanks to the installation of the element 10 of the ban in the state. banning all switch points switch from input 3 to input 2, metering continues.  This mode implements the diagnostics of sticking of the contacts of the relay of input 3, the delay element 50 ensures the delay of polling NORMA is measured on cell 46 Sh-i in order to enable the meter 4 to be set to the position corresponding to the measurement at the new position of the switch 1.  If there are no sticking of contacts. At the relay, input 3, the NORMAL signal interrogated by the signal from the output of element 46 OR at the input of element 36 And after a time delay, passed through 9 elements 32, 36 AND AND element 45 OR, will switch the ring counter to the O state.  In this case, the prohibition of elements 37, 38 I is lifted, and shaper 51 generates a signal that activates trigger 44, as well as through element 47 OR from output 26 of block 16 of control of opening, enters input of input and control unit 13, which with signal Exit 19 sets prohibition element 0 to the prohibit state and starts the generator 1 2.  This mode provides a BRAKE search in the control object, after the switch has not detected any malfunctions in the diagnostic mode.  In the presence of sticking of the contacts of the relay input 2, the corresponding diagnostics mode from the meter 4 enters: the BRACK signal.  Considering that the ring counter 48 is in this mode in state 1, the signal of marriage, passed through the elements 33, 39 and, including the first indicator 52, indicating the presence of a faulty relay of input 2 of the switch.  In the presence of sticking of the contacts of the relay input 3 in the appropriate diagnostic mode, the meter 4 receives the signal BRAC.  Bearing in mind that the ring counter 48 is in this mode in state 2, the BRAC status module, having passed through elements 33, 40 AND, will turn on the second indicator 53, indicating the presence of a faulty relay 3 of the switch 1.  A check of the control object upon detection of one of these types of switch malfunction is no longer carried out.  After executing the diagnostics operations in the search mode, in the control object, the generator 12 pulses are input to the low-order bit of the address register 9, ensuring the formation of the sequence of address selection commands, which normally flow through the valves B to the distributor 7 and then to block 6 memory  The select signal of the disconnected circuit comes from memory block 6 from output 22, stops generator 12 at this address, and through element 17 the IL switches on meter 4.  Switching unit 5 and in this mode provides switching of this point from input 2 to input 3.  9 . 10 After the measurement with a positive result, the NORM signal passes through successive elements 32, 37 And, from the output 25 of the opening control unit 16, it starts the generator 12 and so on. d.  until the faulty circuit is found.  If the measurement result is negative, corresponding to finding the faulty circuit, the signal of BRAC meter 4, taking into account the included trigger, passed through the element 41 And then through the element 47 OR, from the output 26 of the control unit 16, the trip opens.  in block 13 input and control.  Thus, the introduction of the monitoring of the opening of the contacts of the relay of the switch 1 when monitoring disconnected circuits in a group way allows to increase the reliability of the control, as it allows to separate the defect in the control object from the switch malfunction, with sticking of the relay contacts, which is the main disadvantage of the prototype.  Invention Formula A device for controlling electrolytic circuits containing blek. input and control connected by the first output to the first input of the memory unit and the first input of the opening control unit, the second output to the first input of the generator and the second input of the opening control unit, the third output to the first inputs of the address register, the fourth output to the first input of the first And, the fifth output element - with the first input of the first element OR and the third input of the opening control unit; the first and second outputs of the address register are connected respectively to the first inputs of the gates and to the first inputs of the distributor, connected by the second inputs to the outputs of the respective gates, the outputs to the second inputs of the memory unit connected by the first output to the second input of the generator and to the second input of the first element OR, the second inputs to the first inputs of the switching unit, the second input of which is connected to the output of the first element AND , and the outputs - to the inputs of the switch connected to the first and second outputs, respectively, with the first and second inputs of the meter.

third outputs with corresponding top terminals for connecting monitored electrical circuits, the third input of the meter is connected to the output of the first OR element, the first and second outputs respectively to the fourth and fifth inputs of the opening control unit, the first output of which is connected to the first input of the combinator and the third input of the generator , the second and third outputs respectively to the first and second inputs of the input and control unit, and the fourth output to the second input of the first element And, the generator output is connected to the second input address register, and the combinator outputs through the request element to the second inputs of the corresponding gates, in the opening control unit, its fourth input is connected to the first inputs of the second and third elements AND, the fifth input with the first inputs of the fourth, fifth and sixth elements AND, the first and second inputs, respectively, with the first and second inputs of the first trigger connected by the first output to the second inputs of the third and fourth elements I, the second output to the second inputs of the second, fifth and sixth elements I, the output of the second element I connected to the first input of the second trigger connected by the second input to the third input of the opening control unit, the first output of the third input of the fifth And element and the fourth output of the opening control unit, the second output - to the third input of the sixth And element connected to the third output of the opening control unit , the output of the fifth element AND is connected to the first input of the second element OR, the output of which is connected to the second output of the dilution control unit, characterized in that, in order to increase the reliability of the control by excluding false rejection of the monitored: circuits due to a switch relay failure, a third OR element is inserted into the device, connected by the first input to the second output of the input and control unit, the second input to the fifth output of the softening control unit, and the output to the second input of the prohibition element , shes7072912

In addition, the output of the unlock control unit is connected to the second input of the combinator, the seventh, eighth, ninth, de, cth, eleventh and twelfth elements AND, the fourth and fifth elements OR, a two-digit counter, the element OR NOT, delay element, pulse former, third

10 trigger, first and second indicators, and the output of the third element I is connected to the first inputs of the seventh and eighth elements AND, the output of the fourth element I - to the first input) 5 will give the ninth, tenth, eleventh and twelfth elements I, the outputs of the seventh and nine In addition, the elements And are connected respectively to the first and second inputs of the fourth

0 of the OR element, the output of which is connected to the input of a two-bit counter, the output of the first digit of which is connected to the second input of the tenth: element AND, the first input η 5 of that element OR, the fourth output of the opening control unit, the first input of the element OR NOT, the output which is connected to the second inputs of the eighth and ninth elements And the output

Q of the second bit of a two-bit counter is connected to the second input of the OR element — NOT directly, via a delay element — to the second input of the fifth OR element connected by the output to the second input of the seventh

5 And elements, the output of the second digit of a two-bit counter is connected to the fifth output of the opening control unit, to the second input of the eleventh And element, to the input of the 0

For pulses connected by the output to the second input of the second element OR to the first input of the third trigger, the second input of which is connected to the second input of the first trigger, the first output of the third trigger is connected to the second input of the twelfth element I, and the second output to the third inputs of the ninth , the tenth and eleventh elements And, the outputs of the des 0

In addition, the eleventh and twelfth elements AND are connected respectively to the inputs of the first and second indicators and the third input of the second element OR.

five

Claims (1)

Claim A device for monitoring electrical circuits, comprising an input and control unit connected to the first output with the first input of the memory unit and the first input of the opening control unit, the second output to the first input of the generator and the second input of the opening control unit, and the third outputs to the first inputs of the address register , the fourth output - with the first input of the first AND element, the fifth output - with the first input of the first OR element and the third input of the opening control unit, the first and second outputs of the address register are connected respectively to the first inputs of the valves and the first inputs of the distributor, connected by the second inputs to the outputs of the corresponding valves, the outputs - with the second inputs of the memory unit, connected by the first output to the second input of the generator and the second input of the first OR element, the second inputs - with the first inputs of the switching unit, the second the input of which is connected to the output of the first element And, and the outputs to the inputs of the switch connected to the first and second outputs, respectively, with the first and second inputs of the meter, 1 1 by third outputs with corresponding terminals for connecting controlled electric circuits, the third input of the meter is connected to the output of the first OR element, the first and second outputs, respectively, to the fourth and fifth inputs of the opening control unit, the first output of which is connected to the first input of the combinator and the third input of the generator , the second ι and the third outputs, respectively, to the first and second inputs of the input and control unit, and the fourth output to the second input of the first AND element, the generator output is connected to the second input the address register, and the combinator outputs through the request element to the second inputs of the corresponding valves, in the opening control unit, its fourth input is connected to the first inputs of the second and third elements And, the fifth input is the first inputs of the fourth, fifth and sixth elements And, the first and second inputs, respectively - with the first and second inputs of the first trigger connected by the first output to the second inputs of the third and fourth elements And, the second output with the second inputs of the second, fifth and sixth elements And, the output of the second element And so dinene with the first input of the second trigger connected by the second input to the third input of the opening control unit, the first output -, with the third input of the fifth element And and with the fourth output of the opening control unit, the second output - with the third input of the sixth element And connected to the third output of the unit opening control, the output of the fifth AND element is connected to the first input of the second OR element, the output of which is connected to the second output of the opening control unit, characterized in that, in order to increase the reliability of control by eliminating false rejection of controlled circuits due to a failure of the relay of the switch, the third OR element is connected to the device, connected to the second output of the opening control unit by the first input to the second output of the input and control unit, and the output to the second input of the inhibit element, the sixth output opening control unit connected to the second input of the combiner, a control unit incorporated opening seventh, eighth, ninth, de ₅ syaty, eleventh and twelfth aND gates, the fourth and fifth element or two-bit counter, an OR-H E, delay element, pulse shaper, third 0 trigger, first and second indicators, the output of the third element And connected to the first inputs of the seventh and eighth elements And, the output of the fourth element And to the first inputs of the ninth, tenth, eleventh and twelfth elements , the outputs of the seventh and ninth elements AND are connected respectively to the first and second inputs of the fourth 0 element OR, the output of which is connected to the input of a two-digit counter, the output of the first discharge of which is connected to the second input of the tenth: element And, the first input of the fifth OR element, the fourth output of the opening control unit, the first input of the OR-HE element, the output of which is connected to the second inputs of the eighth and ninth AND elements, the output j of the second digit of the two-digit counter is directly connected to the second input of the OR-HE element , through the delay element, to the second input of the fifth OR element, connected by the output to the second input of the seventh 'AND element, the output of the second digit of the two-digit counter is connected to the fifth output of the opening control unit, to the second input of the eleven then _{(of the} And element, to the input of the pulse former connected by the output to the second input of the second OR element, to the first input of the third trigger, the second input of which is connected to the second input of the first trigger, the first output of the third trigger is connected to the second input of the twelfth element And, and the second output - to the third inputs of the ninth, tenth and one ₍ eleventh elements AND, the outputs of the tenth, eleventh and twelfth elements AND are connected respectively to the inputs of the first and second indicators and the third input of the second OR element. 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