SU637819A1 - Arrangement for diagnosis of data-transmitting apparatus - Google Patents

Description

the course of the block allocation of direct and inverse codes.

The drawing shows a block diagram of the device.

The device contains a data source 1, a data code converter 2, a controlled equipment 3, a block for direct and inverse code 4, a decoder for allowed codes 5, a key element 6, a comparison block 7, a clock counter 8, a fault decoder 9, a recording and display unit 10 The following notation is entered into the scheme: Xi is the data code sequence, X; - bi-pulse signal obtained by converting Xj in converter 2, Y (X;) - bi-pulse signal at the output of the equipment 3; Y (X |) is direct and y () is inverse, code sequences extracted from V (, iijN is the error vector at the output of the equipment 3, lj (t) is the vector of the moment of occurrence of the error source, i: i (is the vector coordinates of the source of the error, TI - information supply clock pulses in equipment 3. A pulse signal is a converted pulse sequence of message code symbols, in which the code message corresponds to the representation of a sequence of two pulses: in the case of a single code message - (1.0) and zero code parcels - (0,1) Call duration equal to half the length of the code symbol sending messages.

In hardware 3, data transmission addresses faults, under which faults and failures arise, and which are modeled as sticking of logic elements of equipment in a state with a logical value of 0 or 1.

The device performs diagnostic monitoring of the sources of error in the data transmission equipment as follows.

At the time of launching the equipment 3, the data transmission and diagnostics devices all their memory elements are set to the initial zero state. At the same time, at the output of the serviceable equipment 3, the code sequences Y (Xd) of the allowed code combinations should be issued. If at the moment in hardware 3 there is a failure that occurs when one of the memory elements is not installed in the initial state, then the sequence V (XC) will be an error. Since the Y (XO) sequence is not a bi-pulse signal, only the Y (XO) sequence will be output from the output of the allocation unit 4, and the Y (Xd) sequence will be absent. The sequence Y (X) received with an error at the input of the decoder 5 causes the output

from its signal output, an error that goes to the inputs of the comparison unit 7, the registration and display unit 10.

The functional purpose of the comparator unit 7 is to one by one the addition of the direct and inverse code 1 parcels of sequences extracted from the output bi-pulse signal Y (X;) using the allocation unit 4 to determine the number of the output that caused the malfunction.

Then the sequence y (X (j) through the comparison block enters the inputs of the failure decoder 9, since in this mode it determines the vector

iotm.

The signal error received at the inputs of the block selection and the key element b in the presence of Y (X (,), prohibits the flow of subsequent Til at the input

clock counter 8 and Y (X,) to the inputs of the comparison block 7. At the same time, the vector ig (t) is output from the counter output, which also goes to the input of the failure decoder 9. The decoding of the vectors g (n and o () in the fault decoder 9 gives the vector оn, t, which, from its output, goes to the registration and indication unit o, where no ± o (r (, t) is used to register the number

Failed item of data transmission equipment 3.

Checking the initial state of the elements of the data transmission equipment 3 is transferred to the diagnostic control in the data transfer mode. The data from the output of the data source 1 is fed to the input of the converter 2, in which the sequence Xj of the PC is transformed into a bi-pulse signal Xi. Then bi-pulse signal X

arrives at the input of the apparatus 3, causing its appearance of a bi-pulse signal Y (X), which enters the inputs of the allocation unit 4. In the allocation unit 4 Y (X)), y (Xj) and Y (X)) code sequences are extracted.

In case of failure or failure

in equipment 3 data transmission, under their influence in the signal Y (X-,), there is a violation of the bi-pulse transition in one of the code messages

(l-vl) or (). Then the sequence y (Xj) will be different from y (X;) according to the code message in which the bi-pulse transition in the Y (Xj) signal is violated, therefore, the comparison of Y (X,) and Y (X;) in

Comparison block 7 gives an error vector and an error signal. With the arrival of the signal, the error from the output of the comparison block 7 to the inputs of the key element b and the allocation block 4 is prohibited from being transmitted from their outputs to subsequent TIs and sequences

Claims (2)

Y (X) and 5 (xj). Consequently, the vectors i arrive at the inputs of the fault decoder 9; (p) and i i (t), which are decrypted in it, and from its output a vector is output, (p, I. Access to the recording and display unit 10, vector .t) indicates and registers the number of the failed element of the data transmission equipment. An apparatus for diagnosing data transmission equipment, comprising a recording and display unit and a key element, the control input of which is connected to a comparison unit and an output — to an input of a clock counter, characterized in that, in order to shorten the time of failure search and to increase the diagnostics reliability, it includes a data code converter, a direct and inverse code extraction unit, a decoder for placed codes, and a fault detector, and the output of the data code converter is connected to input controlled equipment, the output of which is connected to the information 6 input of the allocation unit of the direct and TfH codes, the outputs of which are connected to the information inputs of the comparison unit and the inputs of the decoder of the allocated codes, the output of which is connected to the control inputs of the comparison unit and the recording and display unit, information outputs of the block the comparison and clock counter are connected via the fault decoder to the information inputs of the recording and indication unit, and the control output of the comparison unit is connected to the control output Odom block extracting direct and inverse code information input key element connected to the output of clock pulses controlled apparatus and the synchronizing separation and inverse input code block. Sources of information taken into account during the examination: 1. Sogomon and E.S. On the diagnosis of faults in discrete block objects. Automation and Remote Control, № 10, 1969. 2. Japanese Patent 9348, cl. 97 (7) Q 12, 04/30/69. fit} iLJ f (n, t) W