INDUCTIVE-ACOUSTIC CABLE DETECTOR Russian patent published in 2019 - IPC G01R31/08 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used to determine damage points in power cables. Induction-acoustic cable detector comprises switch, first, second and third amplifiers, first and second transistor keys, controlling static trigger with two stable states, transistor pulse switch, to the input of which there connected is output of static trigger, and sockets for headphones installed in one housing, induction and acoustic remote sensors, headphones. Output of the third amplifier is configured to be connected to the headphones through the sockets. Switch has first and second inputs and first, second and third outputs. Transistor pulse switch is made with first and second inputs and first and second outputs. In the cable detector housing there additionally installed are master oscillator with controlled frequency of pulses sending, which output is connected to the second input of transistor pulse key, distance meter to the digital damage point, the input of which is connected to the first output of transistor pulse key, and a digital time meter, the input of which is connected to the second output of the transistor pulse key, a readout unit with a "Reset" button, first and second outputs. Digital time meter has a digital time indicator which is connected to the first output of the readout unit. Distance to the digital damage measuring meter has a digital distance indicator which is connected to the second output of the readout unit. Input of the third amplifier is connected to the second output of the switch, which is configured to alternately connect the input of the third amplifier to the output of the inductive remote sensor connected to the first output of the switch, and to the output of the acoustic remote sensor connected to the second output of the switch. Input of the first amplifier is connected to the first output of the switch, and the input of the second amplifier is connected to the third output of the switch.

EFFECT: high accuracy of determining single-phase phase closure points on the power cable sheath at high transient resistance at the closing point.

1 cl, 2 dwg