SU758174A1 - Device for testing electric wiring - Google Patents

Description

The invention relates to computing and can be used to check the volume and printed wiring for connections, breaks and short circuits between conductors of electronic equipment.

Known devices for testing electrical installation ⁵ Cesky containing logger galvanic connections, inputs coupled respectively to the outputs of the two address registers and input device, a comparison circuit and an output unit, first and second inputs ¹⁰ which are connected to the outputs of address registers, the program input unit connected outputs respectively to the inputs of the address registers and the control unit [1].

The disadvantage of these devices is the long time required to verify the installation.

The closest to the invention to the technical entity is a device for checking the installation, containing two decoders, the communication node with the object, the input of the first decoder is connected to the first output of the counter, the second output and the first input of which is connected2

to the first input and output of the overflow circuit connected by the second input and output to the first output and input of the register counter, and the third output to the control unit connected to the pulse generator and the output of the anti-coincidence circuit, two inputs of which are connected respectively to the outputs of the second decoder and the comparison circuit inputs connected to the corresponding outputs of the counter-register and buffer register, the outputs of the I / O node, respectively, are connected to the inputs of the second decoder, the control node, the point changer node, and the input s with the corresponding outputs of the overflow circuit, the point changer node, the control node and the third counter [2].

The disadvantages of this device are the complexity of the device and its low speed due to repeated polling of the same circuits during the installation check, as each point is checked for connections with all other mounting points, including those with lower numbers and, therefore, checked earlier. In addition, when

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interrogation of all contact points. when testing any circuit, it is necessary to block the contact where the signal is set, which leads to complication of the equipment. Another disadvantage of this device is that the time for checking the installation with a smaller number of contacts is almost the same as for checking the installation having the maximum number of contact points, since all points are polled before the counter overflows, the bitness of which determines the maximum number of contacts which can be controlled on this device.

The purpose of the invention is to increase the speed of the device.

This goal is achieved by the fact that a device containing a communication node with a controlled object, the inputs of which are connected to the corresponding outputs of the switch and the corresponding information inputs of the interrogation switch, whose address input is connected to the output of the point counter and the first inputs of the buffer register and I / O node, the second the input of which is connected to the output of the address register and the input of the decoder connected by the output with the input of the switch, the third input and the first output of the I / O node are connected respectively to the switch th output and input of the control unit, the second input and output of which are connected respectively to the output of the pulse generator and the first input of the point counter, and the third input and output respectively to the first output and input of the comparison circuit, the second input connected to the output of the buffer register and the register of the number of points, the second output of the I / O node is connected to the fourth input of the control node via a network counter, the third output is connected via the register of the number of points to the third input of the comparison circuit, the fourth input is d is connected to output switch survey, the third output IO node connected to the input of the address register and the second input point count, and a fourth input and output - respectively to the output and second input of the buffer register.

The drawing shows the block diagram of the device.

The device includes a switch 1, a switch 2 poll, consisting of node 3 poll and decoder 4, decoder 5, address register '6, counter 7 points, node 8 I / o, counter 9 circuits, node 10 controls, pulse generator 11, circuit 12 comparison, the buffer register 13, the register 14 of the number of points, the node 15 connection, with the controlled object and the object 16 check. The polling node 3 includes the elements NOT (inverters) 17, the elements AND 18 and the element OR 19.

ten

15

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thirty

25

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45

50

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To check the object 16, its contacts are numbered by continuous numbering. Programs 8 are put on the information carrier of node 8, in the following sequence: the number of circuits of the object being inspected is 16, the number of cocoats of the checked object of node 15, the number of the first contact, the number of contacts having galvanic connections with the first contact as they increase, and the number of the last contact the chain has a marker. Next, the numbers of the contacts of the second circuit are plotted as they increase, and its initial contact must have the number of the contact following the initial contact of the previous circuit and not having a galvanic connection with it. The number of the last contact of each circuit must have a marker. Contacts that do not have galvanic bonds with other contacts are considered a circuit containing one contact. In this case, the number of this contact must have a marker.

The inspected object 16 is connected with the help of node 15 to switch 1 and node 3 in such a way that the contact numbers of the checked object 16 unambiguously correspond to the output numbers of switch 1 and the input numbers of node 3.

The device works as follows.

The control node 10 generates a start-up signal at the node 8, which records the first word of the program containing a number equal to the number of checked circuits of the inspected object 16 to the counter 9. It then enters into the register 14 the number of points of the second word of the Program showing the number of contacts of the object 16. Next, node 8 writes the next program word, containing the number of the first contact, into the address register of the 7-point counter, and then the fourth word of the program, containing the number of the contact with galvanic The connection with the first contact is written into the buffer register 13. The number recorded in the address register 6 is decoded by the decoder 5. At the first output of the decoder 5, a signal appears that turns on the first relay of switch 1, which connects zero potential to the first point of the test object 16 via node 15.

The connected zero potential along the circuit of the inspected object 16, which includes the first contact, comes from the contacts included in this circuit, to the inputs of inverters 17, whose numbers uniquely correspond to the contact numbers of the checked object 16. Inverters 17, to the inputs of which received zero potential, give a logical signal “1” at the inputs of the corresponding elements of AND 18 of node 3. Then node 10 will sweep counter 7 into a counter pulse from generator 11. In this case, counter code 7 is decoded by decoder 4,

five

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the second output of which a logical ”1” signal appears, interrogating the second element AND 18. If the first contact of the inspected object 16 has a connection with the second, then the second input of the second element AND 18 has a signal ₅ logical ”1 'and at the output of node 3 a signal appears the presence of communication arriving at node 10, where it is polled through a delay time equal to the time of its appearance relative to the counting pulse. If the specified signal is present, node 10 polls the state of comparison circuit 12, which outputs to node 10 one of three comparison results: the numbers contained in counter 7 and in buffer register 13 are equal; the contents of the counter 7 is less than the number contained in the buffer register 13; the number in the counter 7 is greater than the number in the buffer register 13.

If, as a result of the survey, it turns out that the codes of counter 7 and buffer register 13 are equal, ₂ θ, then it is concluded that there is a connection between the first and second contacts of the object to be inspected 16, node 10 issues a command to node 8 to enter the number of the next contact of the tested circuit to the buffer register 13 Then node 10 ₂₅

sends to counter 7 a counting pulse from generator 11 and after a delay time again analyzes the signal at the output of node 3.

If now the signal at the output of node 3 is missing, which means that there is no connection between the first and third contacts of the object being checked, node 10 outputs the next pulse to counter 7 and again analyzes the signal at the output of node 3. After the signal appears at the output of node 3, the state is analyzed of the comparison circuit 12, in the case of equality of the codes of the counter 7 and the buffer register 13, the node 10 outputs to the node 8 a signal to input the number of the next contact of the tested circuit to the buffer register 13, after which it goes to sending pulses to the counter 7 for I polled the output of node 3. If the number of the contact entered in the buffer register'13 is the number of the last contact of the circuit under test, then it must have a marker that enters node 10 and ₄₅ in the counter 9. Counter 9 is the counter-subtractor. At the beginning of the work, the number of circuits of the object being inspected is recorded in it 16. The marker coming from node 8, which means the control of the last contact of the circuit under test, reduces the number recorded in counter 9 by one. When checking the last contact of the last circuit, the incoming marker sets the counter 9 to the zero state, while at node 10 a signal is issued to monitor the last circuit of the test object 16.

Node 10 remembers the marker and, after checking the presence of a signal at the specified contact, automatically connects the outputs.

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register 14 of the quantity to the comparison circuit 12 and disconnecting from it the outputs of the buffer register 13, and then issuing pulses to counter 7 and polling the signal from the output of node 3 until the number in counter 7 is greater than the number in register 14. In this In case the node 10 generates a signal about the end of the control, disconnects the outputs of register 14 from the comparison circuit 12 and connects the buffer register 13 to it. Then it issues a signal to the node 8 to enter the number of the initial contact of the next circuit to be checked into the address register, beat the counter 7, then The next word of the program in the buffer register 13, the control process is checked.

If the circuit being tested consists of only one contact, then its number is entered into the address register 6 and counter 7, the marker enters the counter 9, and is also stored in node 10, which disconnects the buffer register 13 from the comparison register and connects the quantity register 14 to it points and then

 makes the control as in the case of the last point of the tested circuit.

If in the process of monitoring it is detected that a signal is received from a contact whose number is less than that recorded in the buffer register 13, then node 10 detects this as a short circuit between the circuit being tested and the contact whose number is recorded in counter 7, and outputs a signal to node 8, which , prints a symbol indicating a short circuit and the numbers of contacts recorded in the address register for the 7-point counter, then the node 10 continues monitoring.

If in the process of monitoring the number in the counter 7 is greater than the number in the buffer register 13, then the signal from the comparison circuit 12 enters node 10. It stops issuing pulses to the counter 7 and records that there was no signal at the contact on which the signal is expected . there is a break between the contact, the number of which is recorded in the buffer register 13. Next, the node 10 issues a signal to the node 8 to print a symbol indicating a break, as well as numbers recorded in the address register of the buffer register 13.

Thus, the introduction of the register of the number of points and the counter of the circuits increases the speed of the device at the same polling frequency, and as the polling frequency increases, the response speed increases correspondingly. The introduction of the register of the number of points also reduces the time of the installation check with a smaller number of contacts, and the exclusion of a mechanical decoder increases the reliability of the device.

Claims (1)

Claim Electrical Inspection Device installation, containing the site of communication with the control7 758174 By the controlled object, the inputs of the coyur are connected to the corresponding outputs of the switch and the corresponding information inputs of the interrogation switch, whose address input is connected to the output of the point counter and the first input of the buffer register and I / O node, the second input of which is connected to the output of the address register and the decoder input connected by the output with the input of the switch, the third input and the first output of the I / O node are connected respectively to the first output and the input of the control node, the second input and output of which are connected accordingly but yield impulsots generator and the first input of counter points, and the third input and output - respectively to the first output and the input of the comparison circuit, a second input connected to the output buffer register, characterized in that, in order to increase eight the device’s speed, a counting circuit and a number of points register are entered into it, the second output of the I / O node is connected to the fourth control unit input via a circuit counter, the third output through the number of points register with the third input of the comparison circuit, the fourth input of which is connected to the output of the polling switch, the third output of the I / O node is connected to the input of the address register <0 register and the second input of the point counter, and the fourth input and output - respectively to the output and the second input of the buffer register.