SU1404985A1 - Device for determining cable core number - Google Patents

Abstract

The invention relates to electrical test equipment and can be used to run through cables and mark stranded cables during installation and check the correctness of installation. The aim of the invention is to simplify the device, which is achieved by introducing into it a counter 3 of the cable core number and a controlled frequency divider 5. The device also includes a generator 1, a pulse counter 2, a gated decoder 4, a probe 6, a pulse counter, a decoder 8, an indicator 9, a pulse selector 10, an impulse counter zeroing unit 11. The nulling unit is made in the form of a differentiating chain. All nodes of the transmission, with the exception of the generator, are made on chips of medium integration, 2 or less. I cl c

Description

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The invention relates to electrical test equipment and can be used to run through cables and mark stranded cables during installation and to check the correctness of cable installation.

The purpose of the invention is to simplify the device.

FIG. 1 shows the structural electrical circuit of the device} in FIG. 2 - timing diagrams of a series of pulses generated by the transmitter.

The device consists of generator 1, counter 2 pulses, counter 3 conductor numbers, gated decoder 4, controlled frequency divider 5, probe 6, pulse counter 7, decoder 8, indicator 9, pulse selector 10, pulse counter zero-node 11.

The output of the generator 1 is connected to the input of the pulse counter 2 and with the synchronous input of the controlled frequency divider 5, the control input of which is connected to the first output of the counter 3 core numbers, the input of the latter is connected to the output of the pulse counter 2, the second output of the counter 3 core numbers connected to the input of the decoder 4, the gate input of which is connected to the output of the controlled frequency divider 5, the terminals of the decoder 4 are connected to the corresponding terminals for connecting the test object. The output of the probe 6 is connected in series with the pulse counter 7, the decoder 8, the indicator 9, and through the pulse selector 10 with the zeroing unit 11, the output of which is connected to the Reset input of the pulse counter 7. The output of the pulse selector 10 is connected to the enable input of the decoder 8.

Device; Zo works as follows.

The pulses from generator 1 are fed to counter 2, which, by dividing the frequency of the input pulses, determines the maximum number of pulses in a series. Counter 3, performing a loop recalculation, controls the decoder, which distributes the cycles to its outputs. The controlled frequency divider 5 divides the input pulse sequence from generator 1 and sends the result of the division to the output of the decoder 4, which is open in the Dein cycle, and the conversion factor

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the frequency divider 5 is set by the cycle number from the counter 3 output. Thus, each output of the decoder 4 is given a series of pulses, the number of which is determined by the cycle number from the counter 3 output, the division factor of the frequency divider 5 and is equal to the open decoder number

Q 4. When the probe of the tested cable touches the probe 6, the pulses fill the counter 7, the contents of which are outputted to the indicator 9 through the decoder 8. The pulse selector 10, presenting us, and the one-one vibrator, at the first impulse generates a pulse with a duration at its output no less than the cycle time of the transmitter. This pulse arrives at the input of the decoder 8, prohibiting the indication on the leading edge of the pulse from the output of the selector 10, the zeroing unit 11 generates a short pulse that converts the reader 7 to O.

Node zeroing made in the form of a differentiating chain. All transmitter nodes, with the exception of the generator, are made on chips of medium integration.

Claims (1)

Invention Formula A device for determining the cable core number, containing at one cable end a transmitter consisting of a generator, a pulse counter, a decoder, and at the other end of the cable is a receiver consisting of a probe, serially connected a pulse counter, a decoder, an indicator, a pulse selector, a node zeroing, the output of which is connected to the input Reset of the receiver pulse counter, the input of the zeroing unit is connected to the output of the pulse selector, the input of which is connected to the output of the probe, characterized in that, in order to simplify the device, before The counter has been entered into the counter of the core number and the controlled frequency divider, while the generator output is connected to the input of the pulse counter of the transmitter and to the synchronous input of the controlled frequency divider, whose control input 5 is connected to the first output of the conductor number counter, the input of which is connected to the output of the transmitter pulse counter, the second output of the number counter 0 five 31404985 the conductors are connected to the input of the decoder, connecting the control object, to the probing input of which is connected to the output of the controlled frequency divider, the outputs of the decoder are connected to the corresponding terminals for The output of the loop is connected to the input of the pulse counter, the output of the pulse selector is connected to the input of the decoder. f cb 2 in t in ev / 7 - p impalso The output of the loop is connected to the input of the pulse counter, the output of the pulse selector is connected to the input of the decoder. 7th