SU1606978A1 - Device for checking wiring connections - Google Patents

Abstract

The invention relates to automation and computing and can be used in the manufacture of electronic components of control systems. The aim of the invention is to increase the reliability of control of an object by checking the interconnecting circuits of the object being monitored, which contain passive elements. This is achieved by including a polling switch, a checkpoint select switch, two address decoders, a control signal decoding node, a status register, and two switch control registers, a test current generator, a comparator, and a measuring resistor. The invention provides verification of the wiring connections of electronic units that contain capacitors, inductances, semiconductor diodes, and makes it possible to exclude checks by automated means of wiring connections of electronic components, reduce the overall labor intensity of their manufacture, and increase the reliability of control. 2 Il.

Description

The invention relates to automation and computing technology and can be used to control inter-coupling wiring connections of electronic units during manufacture, testing and operation.

Purpose izob; Ateni is the verification of control by checking the interconnecting circuits of the object to be monitored, which contain passive elements.

Fig, 1 shows the block diagram of the device; in fig. 2 is a functional diagram of a control signal decoding node.

The device contains (Fig. 1) a polling switch 1, a switch point selection switch 2, decoders 3 and 4 addresses, switch control registers 5 and 6, register 7 consists 5, and control signal decoding node 8, bus 9 and 10 addresses and control , test current generator II, measuring resistor 12, comparator 13, reference voltage bus 14, clay 15 data.

The node 8 of the deciphering control signals contains (FIG. 2) an address selector 16 ,. elements And 17-20, setpoint address 21.

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The control unit 22 includes a decryption node 8 of the control sigapes and a computer 23.

The device works as follows.

Registers 5-7 are external to the control computer 23. Registers 5 and 6 are only for recording information, and register 7 is for recording and reading information, and the register is written from the output of comparator 13.

When writing information to registers 5 and 6, the computer sets the address of the selectable register on the tires 9, the selector 16, using the bus 10 exchange signal, compares the corresponding bits of the pn: 9 with the bits of the setpoint 21 and, if they coincide, outputs the external device select signal elements 17-17-19. After that, the control computer removes the address and sets the data on the data bus 15 and generates a write signal, on which the selector 16, depending on which register address was set, generates a write signal, which, go through soot etstvuyusch1Zh zlementy and 17-19, low razeshaet selected register entry nformahschi. After receiving the data, the selected register generates a low readiness signal, meaning that the data is received, through which the selector 16 sets on the bus 10 of the control computer main line a response signal confirming receipt of the information.

When information is entered into the computer e, information is recorded in the register 7 on the status of the comparator 13. Since the inputs of this register are not connected to the data 15, any information can be on the data bus 15 in the recording process. Address selector 16 compares the address bus 9 bits with the exchange signal of the unit 21 addresses master and, if they match, outputs a write signal. Next, the computer removes the address and lowers the read signal. The address selector 16 sets the read signal, which, together with the register selection signal, passing through element 18, sets a signal indicating that register 7 must set data. Register 7 sets data, accompanied by a ready signal, by which the address selector 16 sets the signal

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response to the corresponding bus line 10. After receiving the data, ERM removes the read signal, and the address selector 6 removes the read and answer signals. In this case, the register 7 removes the ready signal. Information on the output data busses of registers 5 and 6 is constantly available for reading, and information on the output bus of register 7 is available for reading only in the cycle of access to this register.

Information recorded in The register 6 through the decoder 4 controls the operation of the switch of switch point 2 for selecting the control point, providing the connection of the output signal of the generator I 1 of the current to the selected contact of the test object under test.

The information recorded in the register 5 via the address decoder 3 controls the operation of the interrogation switch 1, ensuring the connection of the corresponding contact of the test object under test to the measuring resistor 12 and the input of the comparator 13.

Thus, a control circuit is formed, consisting of a test current generator 11, an open channel of the checkpoint selection switch 2 and two contacts of the monitored object, the first of which receives a test signal, and the second checks the response to it of the open polling switch 1 and a measuring resistor 12, which is connected to a common potential bus generator 11. If between two monitored pins

0 of the object is an electrical connection, a current will flow through the measuring resistor 12, causing a voltage drop across it, independent of the resistance of the open channels of the commutators I and 2, If the electrical connection is low, then the voltage drop across the measuring resistor 12 is approximately zero.

The command of the control computer to write to the register 7 records and stores information about the presence or absence of electrical communication between the contacts of the object being monitored, and reading the information from the register 7 enters this information for further processing into the computer.

The host computer records in the register 6 in turn the addresses of all the circuits.

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controlled object. Writing down the next address, the control computer 23 polls in turn | by writing the address to the register 5 all the remaining contacts of the monitored object for detection by recording and then reading the information from the register 7 they are possible to communicate with the contact corresponding to the specified address. The addresses of all the contacts found are sent to the control computer, which compares the accumulated array (real-life circuits) with the reference array (the array corresponding to the connection table of the monitored object), reveals inconsistencies, and if they are, then they are output on the seal with the corresponding signs (break, short circuit).

If a semiconductor diode is connected between the contact points of the monitored object, then each electrical circuit must be tested twice. The test action during the execution of the monitoring program is successively applied to both tested contacts and the reaction of the kg is detected for all contacts of the object being monitored (for simple, regular circuits, the number of switches of the polling switch 1 can be reduced by one after switch switching 2).

Thus, the polarity of the test voltage at two tests is different, therefore, for a working element, in one case the connection will be detected, and the second and second test - an open circuit. If two failures are received, this means that there is a break in the diode under test. IF two compounds are received, this indicates a breakdown of the verifiable semiconductor diode. If a capacitor is connected between the two tested contacts of the monitored object, it will be charged with the test current up to a voltage value determined by the voltage of the generator-1 power supply. After this, the current through the capacitor ceases and the device detects an open circuit.

- PicnpaBHocTb of a capacitor can be checked by means of two checks, which should be carried out at intervals of time specified by the control

between the time of connecting the generator 11 and the measuring resistor 12 to the monitored circuit and the time of writing information about the status of the comparator 13 into the register 7,

If you select the appropriate ratios between the check points, then for a functioning capacitor, the first check shows the connection, and the second - the break. If two breaks are obtained, this means that the capacitance of the capacitor is less than the nominal value or the capacitor is in the break. If the test results in two connections, then this means that the capacitor is tested is broken or there is a large leakage current.

The verification of the circuit containing the potency is also carried out by means of two checks carried out at intervals of time similar to the testing of capacitors.

For a valid inductance, the first test should indicate the absence of a connection, and the second, the presence of a connection. If, as a result of these windings, the connection is twice absent, it means that a break has occurred in the inductance being tested. If the presence of the compound is fixed twice, then this means that there are short circuits in the monitored component.

Claims (1)

Invention Formula Device for controlling wiring connections, composed of a slider's imitator, whose address input is connected via the first address decoder to the input (|) Ornament output of the first switch control register, second switch control register, information output connected via the second-address decoder to the address switch of the selection switch the control point, the group of outputs of which and the group of information inputs of the interrogation switch form a group of device inputs and inputs for control of the group of inputs and outputs the object to, and register state of the control unit of m-l and h and w o f e to the fact that, in order to increase reliability of monitoring by the test circuit mehfazem1a1h coedine I of the controlled object ,. containing passive elements, a test current generator, measuring resistor and comparator in the device, the test current generator output is connected to the information input of the switch of the control point selection, the measuring input of the comparator is connected to the output of the interrogation switch and through the measuring resistor , the reference voltage input to the head gear is the input of the device for connection to the output of the voltage source power supply, the comparator output is connected to the information input in state register NIN whose write and read inputs are connected respectively to the first and second outputs of the control unit, the third and fourth outputs of which are connected respectively to the write inputs of the first and second switch control registers, the readiness outputs of which are connected to the information input of the control unit and the state readiness output , whose information output and informational inputs of the first and second control registers of the switch form the input-output device for connection to the data bus of the control unit neither To the object being monitored .2  P