SU490085A1 - Device for monitoring electrical connections - Google Patents

Description

one

The device relates to the field of instrumentation technology and can be used to control the correctness of electrical connections and to remove circuits in the form of tables in radio and electrical installations.

A device for testing disconnected electrical circuits is known, which contains a multi-pin connector, buttons for manual switching, a power supply unit and an indication unit with signal lamps and a) reactive or reactive resistances.

However, in a known device, when monitoring a system of circuits, the indication of the presence of electrical connections between the monitored circuits may be unreliable, since the interval of non-burning lamps in the indicator unit can simultaneously correspond to several different electrical connections in the system under investigation, such as: electrical connection only two circuits defining an interval of non-igniting lamn; an electrical connection of an indefinite number of circuits that are intermediate in the interval; electrical group connections, galvanically unrelated to each other in the system, of neneii, which are also intermediate in the interval. These flaws do not reliably

connections,

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which may occur by chance or exist for the purpose of the system under study.

The purpose of the invention is to increase the reliability of control and extension of the functionality of the device.

This is achieved in that the device contains multisection potentiometers and switches. Separate sections of potentiometers are connected to control inputs of switches, non-switches with multi-section potentiometers, and a third source of direct current with switches.

The drawing shows a diagram of the device, where 1 is a controlled object; 2 - e.tectrodiphenia in a controlled object; 3 - plug connector; 4 - contacts for connecting the controlled object circuits, digitized from O to N; 5 is a key comprising a transistor 6, a light-emitting diode 7 having digitization, a separating diode 8 and a switch 9; 10 - contacts for connecting the plug, which are digitizing and forming a switchboard together with a plug; 11 Shtecker; 12 - multisection potentiometers; 13- switches in the power supply circuit of the potentiometers; 14 — power supply unit; 15 - the first source of direct current; 16 — second source of direct current; 17 is the third source of direct current.

The device works in the following way.

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JJ in its initial state at switch ON 11Y.1 IStochix 15, turn on the switch. 9 and disconnected link i3, the main circuits of transistors 6 in the keys 5 are de-energized. Owing to the electrical connections 2 in the object, closed circuits are formed, consisting of the corresponding 6th potentiometers 12, the deia AB key 5, 4 contacts digitized in the order of blot 3, the corresponding circuits 1 and 2 of the electrical connection 2. Electroconnection 2 can be called simple, when only two values are connected in the system, thus forming one closed loop, and transparent, when a multitude of object chains interconnect, forming a set of contours, galvapically connected I am waiting for an electrical connection. When one potentiometer 12 is connected to the source 17 by the switch 13, the current flows in the respective circuits, due to the voltage across the circuits from the section connected to the source 17 of the notciometer 12.

The analysis of the passage of current in the circuits, conducted by ISV methods using the smallness of the resistance value of the sections of potentiometers 12 relative to the resistance of the AB circuit of the key 5 for any complexity of the electrical connections 2 and any order connection of the circuits of the object 1 to the digitized contacts 4 of block 3 shows that for some the number of prices of AB keys 5, the direction of arising currents is such that, when JvOTOpOM, the corresponding transistors 6 are opened. Transistor 6 always opens, which has a circuit connected to its base. The AB of the key o is directly connected to that contact 4, the number of which in digitizing in block 3 is the middle of the object circuits covered by this electrical connection 2. Diodes 7, digitized with normal numbers, start to light up, respectively, to contacts 4 in block 3.

Disconnection of the electrical connections of the object to be controlled (checking the correctness of electrical connections) can be carried out in two ways.

In the first method, after switching on the switch 13, the measured light diodes are stored in order of their increase (line 1). Shtkker And connect to koptaktu 10, the number of which in line 1 on the order of the first (younger number). With the switch 13, the potentiometer 12 is disconnected from the source 17. The numbers of the newly illuminated diodes are stored in order of their increase (line 2). The numbers of the diodes, which were also written in line 2, are deleted from line I.

Shtkker II is connected to pin 10, whose number in line 1, after crossing out, is the youngest. The memory of the newly illuminated diodes in the order of them is memorized.

age (line 3). Ps lines i are deleted of the diode measurements that were also recorded on line 3.

These operations are carried out until the NA turns out 3 current numbers in line 1, then alternately turn on the switches that connect other heatpimeters 12 to the source 17, and after each switching on the potentiometer, repeat these operations. In each case, from line 1 it is necessary to cross out the numbers that are assigned to the lines composed according to the preceding one, with 1 point of interest and automatic meter.

Thus, lines 1 are the program of control of the object under study, and the numerical records of each other lines are electrical circuit diagrams 2 in the form of tables.

In the second method, one potentiometer 12 is connected to the source 17 by the switch 13. The plug 11 is connected to the terminal 10, the number of which is determined by the light diode 7 and is the youngest. The switch potentiometer 12 is disconnected from the source 17. The numbers of the newly illuminated diodes 7, which are the circuit of the electrical connection 2 of the object, are memorized.

Turn off the tumblers (9), the numbers of which are the same as the luminous diodes 7.

Switch 13 connects potential 12 to source 17 and repeats the indicated one power until the diodes 7 glow. After that, another potentiometer is connected to source 17 with corresponding switch 13 and the same operation is performed.

Thus, npi; alternately connecting potentiometers 12 to the source 17 in the circuits of circuits in the general case, a multidirectional current appears, allowing you to determine the characteristic circuits of the object 1, united by an electrical connection 2 (by a common diode 7 with a low number). When the plug 11 is connected to the contacts 10 when the source 17 is disconnected, a current from the source 16 arises in all circuits of the object with an electrical connection, which allows detecting the connection cable from the light diodes 7.

The number of keys 5. which can be connected to a section of one potentiometer 12 is determined by the value of the allowable voltage for the AB input circuit of the keys 5.

In the proposed device, it is possible to automate the operations for control and PSD (using printing devices.

Subject invention

A device for controlling electrical connections, containing keys connected by power inputs to a first DC source, signal inputs to a controlled object and a switch that is connected to a second DC source, characterized in that, in order to increase the reliability of the control, it contains myogose-section potentiometers, sections of which are connected to the control inputs of keys, switches connected to multi-section potentiometers, and a third DC source connected to ne eklyuchatel mi.

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