SU1348754A1 - Wiring checking device - Google Patents

Abstract

The invention can be used pflH control interunit mounting of various electronic products. The device for controlling the installation contains a block of 2 indicators with display elements according to the number of monitored elements of the object 1 of the control, source (I) 3 power supply, probe 4, block (B) 5 comparators with comparators 12.1-12.p, B 6 bias resistors with resistors 13.1 -13.P bias, B 7 capacitors with capacitors 14.1-14.P, And 9 bias supply circuits, And 8 reference voltages, switch 10. The device allows to monitor products containing semiconductors, polar capacitors, for detection Poor quality and contact x connections, as it provides the ability to work with low levels of controlled voltage. 1 il. with so; 00 pr

Description

11348754

The concept is related to instrumentation technology and can be used to control the inter-socket mounting of various electronic products.

The aim of the invention is to extend the functionality of the device for monitoring the installation of products containing semiconductor water devices, polar capacitors, and the detection of poor-quality solder and contact connections by introducing a circuit-compatible output into the device. schemes. The comparator provides a comparison of the voltage levels of analog signals at a differential input containing inverting and non-inverting inputs. If the signal level at the inverting input prevails, the comparator produces a logic level O on the output, if the signal level on the non-inverting input prevails, the comparator produces a logic level at the output

elements that provide the opportunity 15 Comparator must provide

operation of the device with low levels of control voltage.

The drawing shows a block diagram of the proposed device.

The device contains a test item 1, a block of 2 indicators for selecting and scrolling connection monitoring, a power source 3, a single contact probe 4 for indicating a controlled circuit, a comparators block 5, a bias resistor unit 6, a capacitor block 7, a reference voltage source 8 , source 9 ueneii bias power supply, switch 10 for controlling the voltage of power supply unit 8, indicators 11.1-11. P included in unit 2, comparators 12.1-12. P, input - in unit 5, resistors 13.1-13.P the offset included in block 6, the capacitors 14.1-14.P to suppress the parasitic oscillations in the comparators included in block 7, the controlled outgoing 1 is connected by lines (according to the number of outputs of the tested product) to the first inputs of the 2 indicator block, to the first inputs of the 5 comparators block and the inputs of the 6 resistor block, the second lines of the inputs of the 2 indicator block, represented by a housing of indicators, they allow connection with a single-contact probe 4, the outputs of the indicator block 2 are connected by lines with the outputs of the comparators block 5 and the inputs of the capacitor block 7.

An indicator 11.1 can be a incandescent lamp, a light emitting diode, a gas discharge element, an electromechanical indicator, or another element of this class.

KoNmaparop 12.1 is an operational DC 1 power amplifier with a dLferenyl input and a unipolar output designed to interface with logic circuits. The comparator provides a comparison of the voltage levels of analog signals at a differential input containing inverting and non-inverting inputs. If the signal level at the inverting input prevails, then the comparator produces a logic level O on the output, if the signal level on the non-inverting input prevails, then the comparator produces a logic level on the output

output voltage and current required for the buildup (excitation) of the indicator 11.1.

The device works as follows.

After switching on and setting the supply voltages, the indicators 11.1-11, n of block 2 will occupy the off (spurious) state, since the comparators j 12.1-12. The block 5 will open due to the predominance of the bias potential at the inverting inputs over the reference potentials applied to the non-inverting inputs of the comparators, and set low potentials at their outputs. The capacitors 14.1-14.P of block 7 prevent the occurrence of parasitic oscillations in the comparators, which are caused by feedback and the capacitive load created by the circuits of the controlled article 1.

 According to the connection table describing the connection of the controlled product I, the operator selects the controlled circuit and indicates it with a probe 4, touching the indicator housing 11.1 corresponding to one of the contacts of the controlled circuit. At the same time, the potentials on the inverted 1x inputs of all comparators 12.1-12.P, which are included in the controlled circuit, are lower, since the probe 4 is under zero potential, and the inverting inputs of the comparators 12.l-12.nj included in the controlled circuit are connected between themselves through a controlled circuit of product 1, due to a decrease in the potentials at the inverting inputs of the comparators 12.1-12.P, connected to the controlled circuit, with respect to the potentials on the non-inverting inputs, the potentials of the outputs of the corresponding comparators 12.1 will increase, which will lead to sha-

giyu () u7 -determination) of the indicators 1 1. displaying a monitored circuit.

The operator compares the numbers of the luminous indicators 1.1 with the numbers of the contacts, corresponding to the ufljx table of connections of the controlled circuit. If this does not include any indicator 11.1 that corresponds to the contact included in the controlled circuit according to the connection table, then item 1 does not contain a fragment of electrical value. If the indicator 11.1, which does not have to belong to a controlled circuit, is turned on, then in item 1 there is an extra electrical connection.

When the controlled article 1 contains, in addition to the connections, semiconductor, devices, and polar capacitors, when choosing (indicating) a controlled circuit with an igup 4, electrical connections with others arise through these elements. In this case, the polarity of the applied voltage to these elements is arbitrary, since it depends on the location of the selected circuit with respect to the element in question. At these voltage levels, the semiconductor elements and polar capacitors do not distort the indications of indicators 11.1–11. As the device does not respond to elements whose resistance to direct current at voltages of the order of 100 mV exceeds ten ohms. Operation at low levels of voltage51 is provided by using Comparators 12.1-12. The voltage of the device is determined by the effect of amplification 1 and reacting to a change in temperature of about 10 mV. The sensitivity of the device is determined by the difference in voltage of the 1P1 Comparators 12. .p, reference eg; Keny on non-inverting inputs to 5parators 12.1-12, p, and the resistance of resistors 13.1-13.11 of block 6, since the device responds only to loads (resistance of the circuit} :), capable of creating through resistors 13.1-13. currents dostatochggye order to zshaemoe You are a voltage drop of na

resistors 13.1-13.P provided the com puter with the first pins of the 1P1Dic block; compensation of the voltage to lock the comparators and the bias resistor block, rtorop, i.e. difference compensation is the second output of which coc; jinieH with the first between eg: -1se P1S m offset, the specified output of the power source by the power supply 9 and the reference bias, the second output of which is so-called: 1 K1 family point-8

48754

voltage, power.

After analyzing the first monitored circuit, the operator disconnects the probe 4 from the body in (1 selected indicator 11.1), which leads to the transition of the device to a 1 s output state, characterized by the turning off of all indicators 11.1 - Q P. n and proceeds to control, the process. for all circuits specified in the connection table, including contacts, which, according to the connection table, should be free.

15

Using switch 10, the operator controls the reference voltage generated by the unit 8.. By increasing the reference ng of the voltage, the inclusion of all indicators Il.l-ll.n is reached, which is then checked to see if they are working. Such verification is necessary because the idle 1) indicator can lead to masking of the error and false readings.

Claims (1)

Invention Formula A device for controlling the installation, containing a power source, an indicator unit; 1 tors with indication elements for uicjiy monitored elements, a control probe, a housing for each element of the indiacapia is connected to its first terminal, And the corresponding terminal for connection of the control object , wh; 1 :; One loop is connected to the first output of the power source, that is, so that, for the purpose of rasi: ireni fuy1 nonalnogo pozhozhestvii, voltage sources, switch, cnopiioro, switch, source of bias pitch displacement, bw of resistance mixers from a resistor pt by the number of monitored elements, co-room block: aaratorp with comparators by the number of controllable x elements, capacitor block with capacitors by the number of monitored elements, first in: 1BOD of the reference control source is connected to the non-inverting input of the block paraparameters, the inverting input of which is connected to the corresponding 5 1348754 dinene with the first output of the source by using the first first outputs of the control unit and through the switch from the second sensors, the second output of which eye output source reference for example, connected to the probe and with the first the outputs, the outputs of the comparators block by the co-input of the comparators block, the second Dineny with the corresponding second VY- whose input is connected to the second outputting of the block of indicators and with the corresponding power source.