SU1506398A1 - Device for checking electric circuits - Google Patents

Abstract

The invention relates to the field of instrumentation technology and can be used to automatically control the quality of installation and insulation of products having a large number of electrical circuits, such as, for example, branched cable networks, printed circuit boards, etc. The purpose of the invention is to increase the reliability of control and speed - achieved by implementing a tunable group control of insulation resistance by the device, for which a block 4 specifying switch groups is entered into the device and the first 17, second 18 and third dissolving relays are entered into the switch. In addition, the device contains an input and control unit 1, a memory unit 2, a switching unit 3, a generator 5, a prohibition element 6, an address register 7, gates 8, a distributor 9, a meter 10, a combinator 11, a switch 12, buses 13 and 14 the meter, the first 15 and second 16 switching relays of the switch. 1 hp f-ly, 2 ill.

Description

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the invention — improving the reliability of monitoring and speed — is achieved by implementing a tunable group control method for the insulation resistance of a device, for which a block 4 specifies switch groups is entered into the device and the first 17, second 18 and third converting relays are entered into the switch. CRO

Moreover, the device contains an input and control unit 1, a memory unit 2, a switching unit 3, generator 5, prohibition element 6, address register 7, valves 8, valve 9, meter 10, combinator 11, switch 12, spikes 13 and 1 meter, first 15 and second 16 switching relays of the switch. 1 hp f-ly, 2 ill.

The invention relates to the instrumentation technology and can be used to automatically control the installation and quality of insulation of products having a large number of electrical circuits, such as branched cable networks, printed circuit boards, etc.

The aim of the invention is to increase the reliability of the control and speed of the device.

FIG. 1 shows a block diagram of the device; Fig. 2 is a block diagram design of the switch groups.

The device for controlling electrical circuits comprises an input and control unit 1, a memory unit 2, a switching unit 3, a switch group setting unit A, a generator 5, a prohibition element 6, an address register 7, gates 8, a distributor 9, a meter 10, a combinator 11 , switch 12, the first 13 and second 14 tires of the meter, the first 15 and second 16 switching relays of the switch, the first 17, the second 18 and the third 19 switching relays of the switch.

The first output of the input and control unit 1 is connected to the first input of the memory 2, the second output is connected to the first input of the 3 switching unit, and the third output is connected to the first inputs of the generator 5 and the prohibition element 6 and the second input of the 4 task group of the switch, fourth outputs connected to the first inputs of the 7 address register, the first outputs of which are connected to the first inputs of the corresponding gates, and the second outputs - to the first inputs of the distributor 9, the second inputs of which are connected to the outputs of the corresponding gates, the second inputs of which us with the corresponding element 6 prohibition outputs. At the same time, the second inputs are elements

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This ban 6 is connected to the corresponding outputs of the combinator 11, the input of which is connected to the fourth output of the block 4 assigning switch groups and to the second input of the generator 5, the output of which is connected to the second input of the address register 7, and the third input to the control input of the meter 10 and the first the output of memory block 2, the second inputs of which are connected to the corresponding outputs of the distributor 9, and the second outputs to the corresponding second inputs of the 3 switching unit, the outputs of which are connected to the windings of primary 15 and the second 16 switching currents The first pins of normally open contacts of the same first 15 and second 16 switching relays are combined in pairs and are pins for connecting monitored circuits. The second pins of the first switching relays 15 are connected to the first bus 13 of the meter 10, the first output of which The signal is connected to the input of the input and control unit 1. The second output of the meter 10, corresponding to the Norma signal, is connected to the first input of block 4 of the switch group tasks, the first, second and third outputs of which are connected respectively to the windings of the corresponding first 17, second 18 and third 19 converters of the switch 12. Second terminals are normal the open contacts of the second switching relays 16 are united in the younger groups and interconnected in each group and with the first closed contacts of the first diverting relays 17, the second pins of which, in turn, are ed, are united in the middle group are connected in each group

between each other and with the first pins of normally closed contacts of the second converting relay 18. The second pins of the contacts of relay 18 are also combined into older groups, connected in each group with each other and with the first pins of the normally closed contacts of the third converting relays 19, the second pins of the contacts which are connected to the second bus 14 of the meter 10.

The unit 4 for assigning switch groups contains the first 20, second 21 and third 22 pushbuttons with dependent latching and normally open contacts, first 23, second 24, third 25 and fourth 26 elements AND, first 27 and second 28 elements OR, first 29, second The 30 and third 31 shift registers, the first 32 second 33 and third 34 keys, the outputs of which are the first, second and third outputs of block 4, respectively, are connected to the windings of the first 17, second 18 and third 19 breakers of the switch, respectively. The first inputs of the keys are connected respectively to the outputs of the first 29, second 30 and third 31 shift registers. The first terminals of the first 20, second 21 and third 22 button switches are connected and are the second input of block 4. The second output of the first button switch 20 is connected to the first input of the first element And 23, connected to the second inputs of the first keys 32, to the first inputs of the first 27 and the second 28 elements OR and the first input of the first shift register 29. The second input of the register 29 is connected to the output of the first element AND 23, the second input of which is connected to the first inputs of the second 24, third 25 and fourth 26 elements AND, and is the first input unit 4. The second output of the second pushbutton switch 21 is connected to the second inputs of the second element AND 24 AND the first element OR 27, the output of which is connected to the connected second inputs of the second keys 33 and the first input of the second shift register 30, the second input of which is connected to the output of the second element And 24, and the third input - with the output of the higher bit of the first shift f- fWcTpa 29. The second output of the third push-button switch 22 is connected to

the second inputs of the third element AND 25 and the second element OR 28, the third input of which is connected to the second input of the first element OR 27, and the output with the connected second inputs of the third keys 34 and the first input of the third shift register 31, the second input of which is connected to the output The third element is And 25, the third input is with the output of the higher bit of the second register 30, and the outputs are with the inputs of the fourth element And 26, the output of which is the fourth output of the block 4 of the task groups of the switch.

The device works as follows.

First, all electrically connected circuits are checked,

0 information for which comes from block 1 input and control, working from an external program. In this case, from block 1 to the register 7 of the address in parallel signals of binary

5 bits of the address, commands for connecting a point to the bus 13 arrive at the first input of the memory unit 2, and commands for connecting the bus 14 to the first switching unit of the 3 switch to the first input.

0 The address information from the second outputs of the register 7 addresses goes to the inputs of the distributor 9 directly, and the first outputs go through the valves 8, to the second inputs of which, connected through prohibition element 6 to the combinator I1, permit signals are received, since in the verification mode circuits element 6 prohibit the signal from the third output of block 1

0 input and control is in the state of the ban.

From the outputs of the distributor 9, the address enters memory block 2, where, if a point is connected to bus 13, it

5 is memorized. In this case, the signal of the corresponding output of the memory block 2 switches the switching relay 15 through the switch 3 in the switch 12, the contacts of which need to connect the point to the bus 13.

In the case of connection to bus 14, the address, having passed through memory block 2, where it is not memorized, switches to switch 3 in switch block 3.

5 12 a switching relay 16, the contacts of which through normally closed contacts of relay relays 17-19, which are switched off in this mode, are connected to the bus 14.

When checking the reported chains, the beginning of the chains are connected to the bus J3, and the ends to the bus 14, and after each measurement the point from the bus 14 is disconnected, i.e. connects to the start bus 13.

After checking the communicated circuits, the testing of the isolation resistance of the disconnected circuits begins by a parallel breakdown of the circuits involved in the testing into two groups. In this mode, the address register 7 is in the initial state, and on the third code of the input and control unit 1 a signal appears, which turns off the prohibition element 6, connecting the combinator 11 through the valves 8 to the inputs of the distributor 9, and also goes to the first combined leads of the pushbutton switches 20-22. At the same time, each state of the combinator 1 1 corresponds to its breakdown into two equal groups of output signals of the distributor 9, and all the states of the combinator 11 ensure the checking of all the circuits of the switch 12.

In each state of the combinator 11, the address signals from the outputs of the distributor 9 are received in parallel in the memory block 2, from the outputs of which only the addresses of the disconnected circuits in the switch group are sent to the switching unit. Unit 3 provides for selected addresses switching off switching relays 15 for selecting bus 1 and switching on switching relays 16 for selecting strip 14, i.e. switching circuits from one bus to another.

The insulation resistance monitoring mode is set by pushbutton switches 20-22. The usual mode of group control of half of the circuits connected to bus 13, with respect to half of the circuits connected to bus 14, is carried out with switches 20-22 turned off. In this case, at the second inputs of the first 32, second 33, and third 34 keys there is no enabling signal, therefore, the first 17, second 18, and third 19 decoupling relays are turned off. After a measurement with a positive result, the Norma signal from the output of the meter 10, having passed through the fourth element AND 26 of the block 4 of the task of the switch groups, comes from its fourth output to the input of the combinator 11, shifting it one step, the composition of the groups changes.

after which a new measurement is made, and so on until a complete check of all circuits.

The sequential control mode on each clock of the combinator 11 with respect to the half of the circuits connected to the bus 13, specified groups of the second half of the circuits connected to the bus 14, is performed when one of the pushbutton switches 20-22 is turned on, setting the split mode of the second half of the circuits, respectively, to lower ones, intermediate and senior groups. In this case, the start signal of the control mode of disconnected circuits, coming from the third output of the input and control unit 1, passed through the closed contacts of one of the switches (for example, 20), writes zero on the first input to the first bit of the first shift register 29, sets the enabling signals to the second inputs of the first keys 32, the first element And 23, and also, having passed through the first 27 and second 28 elements OR, writes down the first inputs

zeros and for the first time the second 30

and the third 31 shift registers, and

also establishes permissive signals at the second inputs of the second 33 and third 34 keys.

In the initial state at the outputs of all bits of all the shift registers of the unit. As a result of supplying the second inputs of the keys 32-34 of the enabling signals and writing zeros to the first bits of the shift registers 29-31, the outputs of all bits, except the first, keys 32-34, turn on the signals of the corresponding decoupling relays 17-19. At the same time, only the chains of the first junior group that are included in the first middle group of the first senior group remain connected to the measuring bus 14.

After measuring the insulation resistance of the circuits of the first younger group, connected to the busbar 14, relative to the half of the circuits connected to the bus 13 when a positive result is received, the signal Norm of the meter 10 is fed to the first input of the unit 4 specifying switch groups, which passed through the first element 23 , enters the second input of the shift register 29 by moving the zero signal from its first bit to the second, and also arrives at the first input of the fourth element AND

26, one of the inputs of which receives the signal from the first bit of the shift register 31. Therefore, the Norma signal does not come from the fourth output of block 4 specifying the switch groups for the shift of the combinator 11, and the check continues at the previous half-split of all circuits, but is already checked with respect to the first half of the chains of the chain of the second group, belonging to the first middle group of the first senior group. If the result is positive, the chains of the third lowest group are checked, etc. until the zero signal is switched from the last bit of the first shift register 29 to its first bit. At the same time, the second shift register 30 switches over to the third input to the next state. The sequential control of all junior groups belonging to the second intermediate group of the first senior group, etc. begins. until the zero signal is switched from the last bit of the second shift register 30 to its first bit. At the same time, the third shift register 31 switches over to the third input to the next state, the junior groups entering all middle groups of the second highest group, then the third, and so on. In this way, all junior groups of the second half of the targets, subsequent

connected to the second measuring bus 14. At the end of the control, a single signal is established at all bits of the shift register 31, which allows the signal of the Norm meter 10 to pass through the fourth element I 26 to the input of the combinator 11, ensuring a change in the composition of the half partition, then - control of junior groups of the second half of the chains relative to the first half, and so on. until complete verification of all targets.

When the pushbutton switch 21 or 22 is pressed, the middle or senior groups of the second half of the chains are monitored with respect to the first half in series. The coit roll mode is completely analogous to that described.

taking into account the fact that for each given level of group splitting, the splitting of chains into groups of senior levels and control of the iscex groups of a given level in each group of senior and hl levels occurs.

With a negative result of measurement in any mode of operation, like the complete half-split of chains into two groups, and when one half of chains is divided into a smaller group, the method of further work is the same

The reject signal from the output of the ID meter enters input 1 and control unit, which, with the third output, turns on prohibition element 6, disconnecting combine 11 from distributor 9 and switching all circuits to bus 13, sets inhibit signals at the inputs of registers 29-3 and keys 32-34, turning off the decoupling relays 17-19, and also starts the generator 5. The pulses of the generator 5 are fed to the input of the low-resolution bit of the register 7 address, ensuring the formation of subsequent signals of the address selection commands that are fed through the gates 8 to distribute Spruce 9 and the idea: in memory block 2.

The selection signal is generally ueia; enters from the first output of memory block 2, stops the transmission of the address and switches on and on the switch: the policeman 10 and switch 3 is switched; c5, the mode ensures 1: 1 transfer from the bus to the bus 14, after a measurement with a positive result, the signal Norma meter 1G) passes through the fourth net-iGAT AND 26 of block 4 of the task of the com- municator groups, starts generator 5, and so far until 1;

Claims (1)

The introduction of additional insulation resistance monitoring modes on the Kai KAOM with a half-split circuit of half of the circuits connected to the first measuring bus, relative to groups of circuits of the second loop, connected in series to the second measuring bus, ensures control of the resistance from; different types of control with regard to their integrity of the chains, the limits of the control, reduce the control error to the required level. Invention Formula one . A device for xitrile electrical circuits containing: ip; p e input and control unit, the first output of which is connected to the first input of the memory unit, the second output to the first input of the switching unit, the third output to the first input of the generator and the first input of the prohibition element, the fourth outputs are connected to the first inputs of the address register, the first outputs of which are connected to the first inputs of the valves, and the second outputs are connected to the first inputs of the distributor, the second inputs of which are connected to the outputs of the corresponding valves, the second inputs of which are connected Inen with the corresponding outputs of the prohibition element, the second inputs of which are connected to the corresponding outputs of the combinator, whose input is connected to the second input of the generator, the output of which is connected to the second input of the address register, and the third input to the control input of the meter and the first output of the memory block , the second inputs of which are respectively connected to the outputs of the distributor, and the second outputs - with the second inputs of the switching unit, the outputs of which are respectively connected to the windings of the first and second switching relays comm the first pins of normally open contacts of the same name of the first and second switching relays are pairwise combined and are pins for connecting monitored circuits, the second pins of the normally open contacts of the first switching relays of connection 1 with the first bus meter, the first output of which. connected to the input of the input and control unit, characterized in that, in order to increase the reliability of control and speed, the unit specifies the switch group assignment unit, and the first, second and third converting relays, the windings of which are connected respectively to the first , the second and third outputs of the switch group assignment unit, while the second outputs of the normally open contacts of the second switching relays are united in the lower groups and are connected in each group with each other and with the first outputs normally The open contacts of the first relaying relays, the second outputs of the contacts of which are combined into middle groups, are connected in each r group with each other and with the first outputs of the normally closed contacts of the second converting relays, the second outputs of the contacts of which are combined into older groups, are connected in each group among themselves and with the first pins of normally closed contacts of the third converting relays, the second pins of which contacts are connected to the second meter bus, the second output of which is connected to the first input of the task unit c Nos switch, the second input of which is connected to the third input and output control unit, and the fourth output - to the input of combiner. 2, the device according to claim 1, characterized in that the block of setting the switch groups comprises first, second and third pushbuttons with dependent latching and normally open contacts, The first, second, third, and fourth elements of AND, the first and second elements of OR, the first, second, and third shift registers, the first, second, and third keys, whose outputs are the first, second, and third outputs of the switch group assignment unit, respectively. connected respectively with the corresponding outputs of the first, second and third shift registers, with the first the pins of the first, second and third pushbutton switches are connected and are the second input of the switch group setting unit, the second output of the first pushbutton switch is connected to the first input of the first And element, connected by the second inputs of the first keys, the first input of the first and the first input of the second OR elements, the input of the first shift register, the second input of which is connected to the output of the first element And, the second input of which is connected to the first input of the second, the first input of the third and the first input of the fourth element s and i is the first input of the switch group setting unit, the second output of the second pushbutton switch is connected to the second input of the second element AND, the second input of the first IZH element whose output is connected to the connected second inputs of the second keys and the first input of the second shift register, the second input which is connected to the output of the second element Pi, and the third input to the output of the higher bit of the first shift register, the second output of the third push-button switch is connected to the second input of the third element And and to the second input nd second OR gate, a third input coupled to a second input of said first OR gate, and output - with the combined second and third keys inputs a first input The third shift register, the second input of which is connected to the output of the third element I, the third input to the output of the higher bit of the second shift register, and the outputs to the second inputs of the fourth element I, the output of the second one is the fourth output of the switch group assignment unit.