SU700844A1 - Device for automatic checking wiring correctness - Google Patents

Description

one

The invention is intended to verify the correctness of the installation of bundles with branched chains, interconnects, and can also be used to monitor the correctness of the electrical connections during the installation process.

Most of the known devices for automatic check of wiring detect and indicate a limited number of faults 1, or you have a large number of faults, have a significant test current determined by the tripping current - relay 2.

(The known device 2 contains a control source, a voltage switch, a control unit, which is a troubleshooting logic, a fault fixation circuit, a resistive voltage divider connected to the control voltage source. In this device, fault control can be performed at the test current more current relay.

The purpose of the invention is to increase the reliability of the device in operation by reducing the operating current.

This is achieved in that the device containing the control voltage source, the first resistor of the voltage divider, the first output is connected to the voltage source of the control voltage, and the second output of the same resistor is connected to the first output of the second resistor splitter through the switch, the inputs which are connected to the test circuits, the control unit, performed on the comparison elements, the fault-fixing unit, diode-resistive circuits are introduced according to the number of circuits tested and the resistor, which causes each of the diode-resistive circuits is connected between the corresponding tested circuit and the input of the first comparison element of the control unit connected via a common bus resistor to the device; the inputs and outputs of the switch are connected respectively to the input of the second and third comparison elements of the control unit whose outputs are connected to the corresponding inputs the fault fixing unit, one of the inputs of which is connected to the output of the first comparison element of the control unit. The drawing shows the block diagram of the proposed device for automatically verifying the correctness of wiring. The device contains the source 1 of the control voltage, the switch 2, the elements of comparison 3, 4.5 of the control unit, the fixation unit b of faults consisting of the logic circuit 7 and the indication circuit 8, faults, software board 9, resistive. divider 10 (R - K)., diode-resistive circuit 11 (R1-D1, R2-1P2 ,,,,), resistor 12 (KO), The switchboard includes a software plate.9, which is a set of jumpers, repeaters to the circuit of the tested cable. As the source of control voltage, the source of direct current E is used, the resistors R and K are equal in magnitude and are selected based on the required test current. Resistors R1 R2 ... RO 10R are connected to each circuit tested. Comparison elements are configured in such a way that the voltage is triggered, neither is the element of comparison 3, the response voltage of the element of comparison 4Ucp4 -f- g the response voltage of the element of comparison .pe 5 The device works as follows. With proper installation of the controlled circuit (case a, b, g in the drawing), the potentials at points A and B are equal and equal to half the voltage of the source of control voltage (), at the same time the potential at point C is approximately 4-. In this case, the elements of comparison 3, 5 are in an unworked state, s, their outputs to the fixing unit 6 do not fail. Logic O are removed. Comparison element 4 works, from its output to the fixing unit b, the logical H is removed, depending on the defect The state of the elements of comparison of the control unit can be reflected in the table.

The circuit is OK

Breakage

A short circuit (for example, the contact groups of the relays of the elements of the same) the signal of the corresponding state of the monitored circuit is sent to the fault indication circuit 8. Thus, the introduction of a diode-resistive circuit and a resistor in combination with a resistive voltage helps to create points in the device circuit, in terms of the voltage in which one can judge the faults present in the installation, by applying these voltages on the control unit comparison elements (according to the combinations of operation of these elements). In this case, the operating current is regulated by the size of the resistors and can be obtained as small as desired, which increases the reliability of the work in general,

Case a, b, g Case c A device for automatically checking the correctness of wiring, containing a source of control voltage, the first resistor of the voltage divider, the first output of which is connected to the output of the control voltage source, and the second output of the same resistor is connected to the first output of the second resistor resistor. a voltage divider through a switch, the inputs of which are connected to the test circuits, a control unit made on the Comparison elements, a fault fixing unit, which, in order to increase reliability by reducing the operating current, the number of diode-resistive circuits tested circuits, resistor, each diode-resistive circuit

connected between the corresponding tested circuit and the input of the first comparison element of the control unit connected via a resistor to the common bus of the device, the inputs and outputs of the switch are connected respectively to the input of the second and third comparison elements of the control unit, outputs of which are connected to the corresponding inputs of the fault fixing unit, one of the inputs of which is connected to the output of the first comparison element of the control unit.

Sources of information taken into account in the examination

1. Author's certificate of the USSR I 283397, cl. G01 T4 31/02, 1966.

2, USSR Author's Certificate 309319, cl. G01 R 31/02, 1967.