SU1712905A1 - Device foe testing intercontact wiring of connectors of radio components - Google Patents

Abstract

The invention relates to instrumentation engineering and can be used to check the quality of intercontact electrical installation of radio-electronic units and blocks. The purpose of the invention is to improve the performance of the device is achieved in order. that the device analyzes the possibility of closing only between adjacent pins of connectors. The device comprises a current pulse generator 1, a pulse counter 2, a code converter 3, a decoder 4. an indication unit 5, a switching matrix 6, a zero-body 7, a memory block 8, a code setting unit 9, a two-input element AND-NOT 10, a two-input element And 11, bus 12 "Reset" and 13 "Start" and da resistor. 2 IL. (Ls

Description

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The invention relates to a control measuring technique and can be used to check the quality of intercontact electrical mounting of connectors (connectors) of electronic units and blocks containing a large number of mounting points.

A device for determining the location of a short circuit in an electrical installation is known.

The disadvantage of this device is the considerable time of searching for a short circuit point between the tested installation circuits.

It is also known a device for automatically verifying electrical installation, comprising a connection search unit, a short circuit location localization unit consisting of a current generator, a switching matrix, a zero-organ and an address code register, a control unit, an information input and output unit, and a memory block. ti.

The known device has a considerable time of searching for a short-circuit point between the monitors checked by polling and comparing the potential of each contact of one circuit under test with the selected contact of another circuit.

The purpose of the invention is to reduce the search time for a short-scan point between the ram contacts of the REA product, to which the interconnect and interconnecting circuits are connected, and to increase the monitoring performance of the entire device,

Delivered by the fact that, in the device for monitoring intercontact 1montazh of connectors (connectors) of electronic products, containing a memory block, zero-or-Tan, switching matrix, the output of which is pedklenchen to one of the inputs of the zero-organ, current pulse generator, pulse counter, converter code, decoder 1 of p, the block of indication of the number of the contact being checked, code setting block, two-input element Y-NOT, two-input element I, two resistors, with the first input of the current pulse generator connected to all even (or odd) connector pins of the control object, another zero-org input, which is connected to the common bus, one counting resistors, the counter input of the pulse counter and the synchronous input of the memory unit, the other two inputs are connected respectively to the output of the code set block and the reset bus - with one of the inputs of the NAND element, the other input of which is connected to the output of the null organ, and

output - with one of the inputs of the element I, the other input of which is connected to n + 1-th output of the output of the decoder 1 from p. and the output - to one of the inputs of the current pulse generator, the second input of which is connected to the Start bus, and the second output - with the common bus, rj information inputs of the switching matrix, the output of which through the second resistor is connected to the common bus, are connected

0 Accordingly, with odd (or even) contacts of the connectors of the control object, and n control inputs, with the corresponding outputs of the decoder 1 of n, the input of which is connected to the output of the pulse counter, the installation input of which is connected to the Reset bus, and the output to the input of the code converter , the output of which is connected to the input of the indication block of the contact being tested.

0 Figure 1 shows the functional.

scheme of the proposed device; in Fig.2 functional diagram of the pulse generator TOKfi.,

The device contains a generator of 1 current pulses, a counter of 2 pulses, a converter of 3 codes, a decoder 4 1 of p, block 5 of indication of the number of the contact being checked, switching matrix 6, null organ 7, block 8 of memory, block 9 setting the code, two-input element AND-NOT 10, two-input element And 11. bus 12 Reset and 13 start and two resistors 14-1 and 14-2.

The first output of the generator 1 current pulses is connected to all the even (odd) contacts of the connectors of the control object 15, one of the inputs of the null organ 7 connected through the first resistor 14-1 to a common bus, the other input of which is connected to the output of the switching matrix

0 6 and through the second resistor 14-2 to the common bus, the counting input of the counter 2 pulses and the synchronous input of the memory block 8. Two other inputs of the memory block 8 are connected respectively to the output of the code setting block 9 and

5 bus 12 Reset, and the output with one of the inputs of the element AND-NOT 10, the other input of which is connected to the output of the null organ 7, and the output to one of the inputs of the element And 11, the other input of which is connected to n + 1

0 to the output of the decoder 4 1 from p, and the output to one of the inputs of the generator 1 current pulses, the other input of which is connected to the bus 13 Start, and the second output to the common bus, g information inputs of the switching matrix 6 are connected respectively to odd (even) the contacts of the connectors of the object 15 of the control, the ap control inputs - with the corresponding outputs of the decoder 4 1 of p, the input of which is connected to the output of the counter 2 pulses.

The setup input of the counter 2 pulses is connected to bus 12 Reset, and the output to the input of converter 3 of the code, the output of which is connected to the input of block 5 of the display of the number of the tested contact of the object connectors, 15 control.

The current pulse generator 1 comprises (Fig. 2) a voltage pulse generator 16, an OR element 17, an AND-HE element 18 and a current pulse driver 19. The inputs of generator 1 (Fig. 1) are the two inputs of Element OR 17, the output of which is connected to the first input of element Y-NO 18, the second input of which is connected to the output of generator 16, and the output to the input of former 19, the output of which is output generator 1 current pulses.

The zero-body 7 performs a comparison of the potentials at the two monitored points of installation and produces at its output a logical signal with equal potentials at its inputs.

The memory unit 8 is designed to store binary information about the junction points of the adjacent contacts of the control object connectors provided for by its design, and can be implemented, for example, on a shift register with parallel input and sequential information output.

The code setting unit 9 is intended for the operative recording into the memory unit 8 of the memory information on the junction points of the adjacent contacts of the monitoring object, provided for by its design, and can be implemented on code switches of type PP8-3.

Resistors 14-1 and 14-2 are designed to create a current in the circuits: first output of generator 1 — combined even (or odd) contacts of connectors of control object 15 — resistor 14-1 — common)) bus and first output of generator 1 — closed adjacent The contacts of the connectors of the object 15 of the control (in the case of poor quality of installation) are closed one of. information inputs and the output of the switching matrix 6 - resistor 14-2 - common bus. The resistance value of the resistors 14 is selected from the condition Ri4 "RsH.reH.I.

The principle of constructing the scheme of the proposed device is based on the well-known circumstance that in the process of manufacturing serial REA with proven technology, most often short mounting occurs due to a short circuit between adjacent (adjacent) connector pins of the products due to their soldering during installation work. This fact allows for an intensified search for short

electrical closure of sectional electronics by automated sequential evaluation of the potential difference. between every two adjacent pins of connectors, in contrast to the known less productive method, in which the search for a short circuit in the installation is carried out by controlling the connection of each contact with all the others.

0 The device operates as follows.

Before starting the object 15 kontrid, connect to the device so that all odd (or even) contacts it

5 AI connectors, Az. ... A2n-i were connected respectively to the information inputs 1,2, ..., n of the switching matrix 6, and the even (or odd) contacts Aa, A4A2p - with

circuit connecting generator 1 output

0 pulses, the first pin of the resistor 14-1 and one of the inputs of the zero-body 1 To start the device, you must send a control signal to the bus 12 Reset to reset the counter 2 and the block

5 8 of the memory, which means for the last entry from the block 9 of specifying the binary information about the junction points of the adjacent contacts of the connectors of the control object 15 provided by its design. The generator 1 according to the signal G on one of its inputs (on one of the inputs of the element OR 17, FIG. 2), supplied from the output of the element 11 and 11 (on Bus 13 Start, the signal O is present) produces current pulses, which

5 outputs go to interconnected even (or odd) contacts of connectors of object 15 of the control, one of the inputs of the null organ 7, the synchronous input of memory block 8 and the counting input of counter 2. The latter changes its state with -bt and Its outputs control the state of the 3 code converter and the decoder 4.

The control signals from the corresponding 5 outputs 1,2 ..., p of the decoder 4 are fed to the control inputs of the switching matrix 6, under the influence of which the latter carries out sequential alternate connection of the odd (or even) terminals of the control object 15 to the second input of the null body .

According to the specified scheme of connecting the control object to the device, the null body 7

5 compares the potentials of each of the odd (or even) pins of connectors from to. the potential of adjacent even (or odd) contacts of the connectors of the object 15 of the control at the moment of applying current pulses from the generator 1 output to the even (or odd) contacts of the connectors of the object 15 of the control. Simultaneously with the formation of these current pulses, the number of the tested contact is displayed in the display unit 5, and one of the inputs of the AND-NE element 10 receives from the output of the memory block 8 binary information consisting of 1 and 0, of which 1 corresponds to no need in the circuit between the corresponding adjacent contacts of the connectors of the object 15 of the control, and O - the presence of a circuit between the adjacent contacts in accordance with the requirements of the design. . Interrogation and comparison of potentials between the two inputs of the zero-organ 7 continues until the potential difference between them becomes zero, which occurs when one of the pairing contacts of the control object 15 connects or at the end of the control cycle of all contacts when O s ( n + 1) -output of the decoder 4 to one of the inputs of the element 11.

If there is a closure of one of the pairs of adjacent contacts, one of the inputs of the AND-10 element enters the output of the zero-organ 7 1 and. if at this moment the same signal from the output of memory block 8 is transmitted to the other input of the AND-NOT 10 element, O is generated at the output of the NE-NE element, which, through the AND It element, stops the operation of the generator 1 and the device as a whole. In this case, the block 5 of the display highlights the number of one of the closed contacts of the connectors of the object-15 control. If at the indicated time of the interrogation to the input of the Y-HE 10 element, connected to the output of the memory block 8, a speaker O indicates that it is necessary to close between the analyzed pair of contacts, then the output of the IS-NE 10 remains 1, and the device continues its operation until the appearance of an erroneously closed pair of contacts or until the end of the cycle of the entire check.

If it is necessary to analyze all faults in the installation of the control object without correcting individual places of the closures, then after each intermediate stop of the device operation, bus 13 starts a signal 1, which restarts generator 1 and, consequently, the entire device.

Thus, the device for monitoring the inter-contact installation of connectors for electronic products allows to reduce the time of searching for a short-circuit point between the contacts of the connectors of the serial products of CEA, to which

intercontact and interconnecting circuits are connected due to the analysis of possible closures between adjacent KoiHTaKTaMM connectors, which leads to an increase in the performance of the control of especially difficult to assemble commercial products of electronic equipment.

Formula of invention

A device for monitoring the intercontact mounting of connectors (connectors) of radio-electronic products, containing a memory blob, a null-organ switchboard, the output of which is pd connected to the first input (

do zero body, different bodies, that, in order to increase productivity by reducing the search time short circuit points between the connectors of the connectors of the electronic equipment to which I connect

an intercontact and an interconnecting circuit, a pulse current generator, a pulse counter, a code converter, a decoder 1 of n, a display unit for the number of the contact being checked,

code setting block, IEE two-input element, C two-input element, two resistors, the first output of the current pulse generator connected to all the even (or odd) contacts of the object's connectors

control, the second input of the zero-organ connected through the first resistor to the common bus, with the even input of the pulse counter and the synchronous input of the memory block, the other two inputs of which are connected respectively to the output of the code setting block and the reset bus, and the output to the first input of the AND element - NOT, the second input of which is connected to the output of the zero-organ, and the output to the first input of the element I, the second input

which is connected to the n + 1-m output of the decoder 1 of l, and the output - to the first input of the current pulse generator, the second input of which is connected to the Start bus, and the second output - to the common bus, n information

inputs of the switching matrix, the output of which through the second resistor is connected to the common bus, are connected respectively to odd (or even) contacts of the connectors of the test object, and n control

inputs - with the corresponding outputs of the decoder 1 of p, the input of which is connected to the first output of the pulse counter, the installation input of which is connected to the bus, and the second output is connected to

the input of the code converter, the output of which is connected to the input of the display unit of the number | 1 {Y8 of the contact. .

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Claims (1)

Claim 10 A device for monitoring the intercontact installation of connectors (electronic connectors) of electronic products, containing a memory unit, a zero-organ switching matrix, the output of which is connected to the first input 15 of the zero-organ, characterized in that, in order to increase productivity by reducing the search time of the short point short circuits between the contacts ^ of the connectors of the CEA product, to which the interconnect and interconnector circuits are connected, a pulse generator, a pulse counter, a code converter, a decoder are introduced into it 1 of η, block for checking the number of the tested contact, 25 block for setting the code, two-input element Vb NOT, two-input element C, two resistors, the first output of the current pulse generator connected to all even (or odd) contacts of the connectors of the object 30 of the control, the second input is zero -organ connected through the first resistor to a common bus, with an even input of the pulse counter and the clock input of the memory block, the other two inputs of which are connected respectively. 35, respectively, with the output of the code setting unit and the Reset bus, and the output with the first input of the NAND element, the second input of which is connected to the output of the null organ, and the output with the first of the inputs of the And element, the second input of which 40 is connected with η + The first output of the decoder 1 of p, and the output is with the first input of the current pulse generator, the second input of which is connected to the Start bus, and the second output is with a common bus, η information 45 inputs of the switching matrix, the output of which is connected to the second resistor through common bus, connected respectively to the odd (or even) to ntaktami connectors object monitoring and control etc. 50 inputs - with the corresponding outputs of the decoder 1 of p, the input of which is connected to the first output of the pulse counter, the installation input of which is connected to the Reset bus, and the second output is connected to the 55 input of the code converter, the output of which is connected to the input of the display unit of the tested contact number. .