SU1213442A1 - Apparatus for determining character and place of defect in cable articles - Google Patents

Abstract

The invention is intended to control the quality of cable products, printed and film boards, etc. The purpose of the invention is to expand the functionality and increase the sensitivity of the device. The device contains a resistor 1, a generator of 2 pulses, a HE element 3, two-input elements AND-NOT 4 and 5 and an indicator 6. The description provides examples of the device operation in cases of cable breakage, conductor short-circuits, in determining the presence of breakdown in capacitors and determining the health of the diodes. 1 il. (L

Description

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The image relates to the field of electrical measuring equipment and is intended to control the quality of cable products, printed and film boards, as well as the health of a number of elements.

The aim of the invention is to enhance its functionality and increase the sensitivity of the device.

The drawing shows a functional block diagram of the device.

The device contains a resistor 1, a generator of 2 pulses, the element is NOT 3, Two two-input elements AND-NOT 4 and 5 indicator 6. The output of each of the elements AND-NOT is connected to the corresponding input of the indicator 6 and the input of another element AND-NOT.

The output element is NOT 3 connected to the input element AND-NOT 4. The input element NO 3 and the input element AND-NOT 5 is connected to the output of the generator 2 pulses. Terminals 7 and 8 are device inputs.

The device works as follows.

When the device terminals 7 and 8 are disconnected, the generator 2 pulses for the input capacitance and the feedback resistor is energized and generates pulses, while the RS flip-flop (AND-NOT logic gates 4 and 5) periodically change their state with the generation frequency, therefore LED indicators 6 light vehicle. Resistor 1 allows you to vary the duration of the pulses up to

fluctuations.

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Before checking the cable for detecting a broken wire, the device is adjusted by smoothly decreasing the variable component of resistor 1 so that the lower LED 6 lights off, after which the conductors are short-circuited between themselves on one side of the cable and on the other side of the device terminal. 7 and 8 are connected to conductors. Verification is performed on one valid conductor. Then, when the conductors are in good condition, it turns out that the terminal 7 is a shad of zero potential, therefore, the generator 2 of the pulses will not be excited, and from its output a signal corresponding to the logical 1, coming at the input of the element

22

, NOT 3, from the output of which the logical O signal triggers the RS flip-flop (logic elements NAND 4 and 5) to the logical 1 state, the lower LED 6 in the scheme will be lit indicating that the conductors are in good condition. (This is how the faults in the connectors are determined).

If there is a breakdown at the beginning of the conductor (the area is determined by the device setting, at the request of the operator, using the reference capacitance), the LED 6 on the top of the circuit lights up, since the interconducting capacitance is not long enough. excitation of the generator 2 pulses, and if it crashes at the end of the conductor (beyond the excitation threshold of the generator 2), both LEDs of the indicator 6 are illuminated. You can search for the destruction of a single conductor (printed circuit boards, film boards) by connecting the device terminals 7 and 8 on both sides .

Detection of short-circuit conductors produced by connecting the terminals of the device 7 and 8 to the studied conductors, while in the presence of K.Z. oscillations of oscillator 2 pulses occur, since at terminal 7 there will be a zero potential, and at generator 2 output a signal corresponding to logic 1, which arrives at the input of the HE element 3, the output of its output is a logical signal O, which translates RS-trigger (logic elements AND-NOT 4 and 5) to the state of logical 1, the lower LED of indicator 6 will be illuminated, indicating a short circuit in the circuit.

Similarly, the test of the presence of a breakdown on a housing with residual resistance from 0 to 2 kΩ, the threshold of device activation is monitored by a resistor l).

When determining the presence of breakdown in capacitors, the latter is connected by its own terminals to terminals 7

and 8 devices. When the capacitor is in good condition, both LEDs of the indicator 6 are lit, at large capacitances, more than 100 microfarads of LEDs are alternating. If there is a breakdown or significant values of the leakage current of a light / titc one, the indicator LED 6 on the bottom of the circuit.

The health of the diodes is checked as follows.

If you connect the diode with an anode to terminal 7, and the cathode to terminal 8 of the device, then if there is a working diode, the lower LED lights up in the diagram 6. If the diode is faulty, both LEDs 6 are illuminated.

With reverse connections, i.e. the anode to terminal 8, and the cathode to terminal 7 of the device, when the diode is in good condition, both LEDs 6 light on the LED (due to the diode capacity), if the diode is faulty (short circuit of the diode, the bottom LED 6 lights up.

In the case of a faulty diode that has a breakdown of the glow of both LEDs of the indicator 6, it is observed in any connection.

The health of the power circuits of the TTL-series microcircuits is checked in the same way as the diode health checks.

Thus, the proposed device makes it possible to detect in the cable products short-circuit conductors both between themselves and on the case, insulation breakdown with resistance, resistance of conductors.

The device also makes it possible to determine the presence of a breakdown in the condensate. Editor T. Kugrsheva

Compiled by E. Kushch Tehred M. Parotsay

779/56 Circulation 730 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035

Branch PIP Patent, Uzhgorod, Proektna St., 4

tori, serviceability of diodes, circuits, power circuits of TTL-series.

Claims (1)

Invention Formula A device for determining the nature and location of a malfunction in the cabling equipment, containing a pulse generator, the first and second IS-NOT elements, the indicator, the first and second terminals for connecting-To the control object, the output of the first IS-NOT element is connected to the second input of the second the NAND element and the second input of the indicator, the output of the second NAND element is connected to the second input of the first NAND element and the first input of the indicator, characterized in that, in order to expand its functionality and increase its sensitivity, entered p the resistor and the NOT element, the first resistor connected to the common bus and the second connecting to the first terminal for connecting to the test object and to the input of the pulse generator, the output of the pulse generator connected to the input of the NOT element and to the first input of the second element NAND, the output of the element is NOT connected to the first input of the first element AND-HEj; the second terminal for connection to the test object is connected to the common bus. Proofreader O.Lugov