SU388261A1 - Y1IOTEKA - Google Patents

Description

one

The invention relates to automatic Ke and instrumentation technology and can be applied to monitor the performance of non-repeated discrete automata.

A device for determining diagnostic tests using digital computers is known, containing an I control circuit: test set indicator.

However, this device is complicated and requires a large amount of computational operations on a digital computer.

The proposed device is characterized in that it uses a switch of variable logic functions associated with the control and execution depot of the decoder, and a switch of variable logical subfunctions of the elementary subcircuits associated with the control points of the decoder, the load of which is the indicator test kits.

This allows to simplify the device and reduce the amount of computational work.

Pa figs. 1 shows a block diagram of the device; in fig. 2 - the principle of one of the possible variants of its technical implementation.

The device contains a power supply 1, a control circuit 2, a switch 3 of the variables of the logical function of the diagnosed automaton, a switch of 4 variable logical subfunctions of the elementary subcircuits of the diagnosed automaton, a decoder of 5 test sets and an indicator of 6 test sets.

The power supply is connected via a control circuit to the switches of the set of variables of the logic function and subfunctions. Switch 4 of the variable logical subfunctions of the elementary subcircuits of the diagnosed automaton is electrically connected with the control circuits of the decoder 5 test sets, and the switch 3 of the variables of the logical function is connected with the control and actuator circuits of the decoder 5, the indicator of which 6 serves as test sets.

In one of the possible variants of the technical implementation of the device (Fig. 2), the source / power supply is a constant voltage busbar, and the control circuit 2 is a relay, but the push-button starter that provides power to the other nodes of the device only during reading test kits.

The switches of variable logic functions and subfunctions of the elementary subcircuits of the diagnosed automaton are made in the form of stores of two-pole switches with a fixed neutral position. The moving parts of all switches of switches 3, 4 are connected in series

one with another common bus, with which the positive pole of source 1 is connected via control circuit 2. Each switch of switches 3, 4 is fully defined: this variable is a logical function or a subfunction of the automaton being diagnosed. The upper position of the switches corresponds to the variable set of a logic function or subfunction without Ishersion, and the lower position to the same variable, but with inversion.

The decoder 5 test kits is an electromechanical solver circuit.

Indicator 6 test kits are made in the form of a light panel of switching electric lamps, by means of which the required test set is displayed. Each lamla corresponds to a particular bit of test suite in binary code.

In the initial position, the device is de-energized, and the switches of the switches 5, 4 are in the neutral position.

To determine the diagnostic tests for a false zero, using the switch 3 switch, variables of the logic function are recruited, and with KOiMMyTaTopa, 4 variables of the logic subfunctions of one of the elementary circuits of the automaton being diagnosed.

When the supply voltage is applied to the switches 3, 4, the logical variables are converted into the corresponding electrical signals acting on the control circuit of the decoder 5. Dechy: the fractioner 5, solving a logical problem, determines the test set that diagnoses the false zero of the verifiable elementary subscheme .

The resulting test suite is displayed as a binary code on indicator 6. Test kits for diagnosing a false zero for the remaining elementary subcircuits are obtained by a sequential set of variables

their logical subfunctions with the help of switch 4 at the same null and switches of switch 3. Combining the test sets thus obtained, define the tests that diagnose all the elements of the automaton for a false zero.

To determine the tests that diagnose a non-repetitive automaton for a false unit, with the help of switch 3, the variables of the inverse logic function of the automaton are typed, and with the help of switch 4, the variables of the inverse logical subfunction of one of its elementary subcircuits. When the power supply voltage is turned on, the indicator 6 displays a test set that diagnoses the elementary subcircuit being tested for a false unit.

Test-diagnostic kits for the false unit of the remaining elementary subcircuits are similarly readable at the same position; switch 5. Combine the received test kits, receive tests that diagnose all the elements of the automaton for a logical unit.

Subject invention

A device for determining diagnostic tests of discrete automata containing a control circuit and an indicator of test sets, characterized in that, in order to improve the performance of the device, a decoder, a switch of variable logic functions connected to the decoder control and execution targets, and a switch are installed in it changes / logical subfunctions connected to the control circuits of the decoder, the output of which is connected to the test case indicator ..

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