SU911376A1 - Apparatus for checking radiocomponent wiring correctness - Google Patents

Description

This invention relates to instrumentation engineering, in particular to checking the correctness of electrical connections.

- A device for checking the correctness of electrical installation is known, comprising a clock generator, a poll counter and a polling switch P 3.

A disadvantage of the known device is reliability.

The closest in technical essence to the invention is a device comprising a pulse generator, a counter, a polling switch, AND elements, an OR element, and an erroneous connection analysis decoder t2.

A disadvantage of the known device is the complexity, due to the fact that the number of inputs of the element And depends on the number of contacts of the circuit of the controlled product to which this element is connected, and the number of elements And depends on

the number of circuits in the checked device. This leads to the fact that if the device is intended to test products of the same type, the number of inputs of each AND element connected to the contacts as Jshbo Circuit is determined by the product in which this circuit has the maximum number of contacts, and the number of And elements is CMM Makto the maximum number of chains. Because of this, the device must have a large number of And many logical AND logic elements, which leads to its significant complication.

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In addition, the known device has a low reliability of control due to the fact that the decoder analysis of the erroneous connection generates a signal Slancan not only

20 in case of an erroneous connection by the circuit, a, the element OR generates a signal breakage only if there is no signal from the start between the beginning of the circuit and the output of any element I. This leads to the fact that, in the event of an incorrect connection, when the inputs are confused or circuit outputs, the device generates a signal Norm. The purpose of the invention is to increase the accuracy of control results and simplify the device. This goal is achieved by the fact that in a device for checking the correctness of electrical installation of electronic products, containing a counter connected to the output of the pulse generator, the output to the ne input of the first switch connected to the first outputs with the input terminals of the product being monitored, the OR element is connected to the first input of the mismatch element and the input of the first element NO, the logic analyzer is entered, the second element is NOT, the first and second elements match, the input unit and, the second switch, connected by an output to the input terminals of the monitored product, an input to the output of an input unit whose input is connected to the output of the first switch, an output to the first input of the logic analyzer connected by a second input to the output of the counter, an output to the first input of the first coincidence element, the second the input of the mismatch element and through the second element NOT to the first input of the second mismatch element, the second input of which is connected to the input of the first element NOT connected by the output to the second input of the first match element . The drawing shows a functional diagram of the device. The device contains the second switch 1, the input unit 2, the controlled product 3, the first switch 4, the counter 5, the pulse generator 6, the element OR 7, the logic analyzer 8, the mismatch element 9, the first element 10, the match, the first element NOT 11, the second element 12 coincidence, the second element is NOT 13. Switch 1, controlled from the input unit, all on switch 1, the number of the contact being tested, supplies the measuring voltage to the corresponding contact of the controlled product 3. Switch 4, controlled by the counter 5, which receives a pulse The generator from the COB pulse generator 6 alternately connects each circuit of the monitored product 3 to the inputs of the element OR 7, which performs the function of a circuit presence indicator, and switch 4 runs around all the circuits after each switch 1 switch. The signal from counter 5, which is a number code the circuit controlled at a given time also goes to one of the inputs of the logic analyzer 8 of the circuit number, to the second input of which from the input unit 2 a signal is received, which is the code of the circuit number in which there should be a connection. The signals from the outputs of the indicator of the presence of the circuit - the element OR 7 and the logic analyzer 8 are fed to the inputs of the output signal generator Open, Closure is a two-input matching logic elements and inputs of the Norma signal conditioner performed on a two-roll mismatch element. The inputs of the voltage mismatch element 9 from the outputs of the OR element 7 of the alogical analyzer 8 are fed directly, therefore the Norm signal appears only in the case of simultaneous occurrence of voltage both at the output of the OR element 7 and at the output of the logic analyzer 8, i.e. . if properly bonded. The inputs of the coincidence element 10 come from the logic analyzer 8 directly from the element OR 7 through the element NOT 11, so the Open signal appears if there is a voltage at the output of the logic analyzer 8 and the output of the element 7 is missing those. in case there is no correct connection. The inputs of the element 12 coincidence voltage from the element OR 7- comes directly, and from the logic analyzer 8 through the element NOT 13, so the signal closure appears if the voltage at the output of the element OR 7 is, and the output of the logic analyzer 8 is missing i.e. in case there is an erroneous connection. Thus, alternately connecting the circuit of the device under test to the logical element OR through a switchboard controlled account 591

This method, as well as comparing the number of the controlled circuit with the number of the chain in which the connection should be, makes it possible to increase the reliability of the control results.

. Controlling the switchboard not from the generator through the counter, but from the input unit and the introduction of the analyzer, makes it possible to exclude a large number of multi-input AND elements from the device circuit, which greatly simplifies the device.

Claims (2)

1. USSR author's certificate number 1871A4, cl. G 01 R 31/02, 1966. 2. USSR author's certificate number 627424, cl. G 01 R 31/02, 1978 (prototype). .fffpvS