Korea Electric Power Corporation

Other

Byung-Hak Cho

Joon-Young Park

Jae-Kyung Lee

Ki-Yong Oh

Yong-kwan Lee

Jong Seog Kim

Jae Kyung Lee

Joon Young Park

Ki Yong Oh

Chang-Hoon Shin

Dong-soon Yang

Seong-Il Song

Seung-Hyun Byun

Seong-Ii Song

The present disclosure relates to a hand-held voltmeter measuring a peak voltage of a high voltage pulse applied to an electric fence. The voltmeter includes a body case of which one side has an opening, a sensor case protruded from the opening of the body case, a voltage divider disposed over the inside and the outside of the sensor case for dividing the high voltage pulse into a low divided voltage, a peak detector for detecting the peak voltage of the divided voltage, a display unit for displaying the peak voltage, and an MCU for controlling the input and the output of the elements constituting the voltmeter. According to the present disclosure, an electric fence voltmeter that measures the peak voltage accurately without need to make a ground connection to the earth, and has a low risk of an electric shock during a measurement is provided.

Hand-held voltmeter for electric fence

The present disclosure provides an electric fence voltmeter having a peak detection type voltage divider. The peak detection type voltage divider has an extremely simple configuration composed of two capacitor voltage dividers and two rectifier diodes for detecting the positive and the negative peak voltages of a high voltage pulse with an additional pulse state voltage having information on the moments the high voltage pulse starts and peaks. Thus, the voltmeter has reduced number of parts with simplified circuits, and is able to measure the peak voltage accurately with a reliable and efficient manner using the pulse state voltage. Thereby the voltmeter has benefits of improved measurement accuracy, reduced production cost, and low battery consumption.

Smart voltmeter for electric fence

The present disclosure relates to a robot mechanism for nondestructive aging evaluation of a cable. The robot mechanism includes at least two inspection modules, and a coupler disposed between the at least two inspection modules and connected to each of the inspection modules to adjust a separation between the inspection modules. Each of the inspection modules approaches a cable and automatically inspects an aged state of the cable. The robot mechanism automatically measures an aged state of a cable in a nondestructive manner and establishes a database of cable aging, so that normal operation of the cable can be ensured through stable management of the cable by evaluating a replacement time and the aged state of the cable based on the database.

Robot mechanism for nondestructive aging evaluation of cable

Disclosed is a movable object type high-efficiency wave energy apparatus which further accelerates vibration of floating bodies according to vibration of waves to maximize electric power generation efficiency.

Movable object type high-efficiency wave energy apparatus

A nondestructive inspection method of testing insulators using frequency resonance function that can inspect an anomaly of an insulator by vibrating the insulator with a force having the characteristic of white noise, measuring the change in motion of the insulator according to the vibration and calculating the frequency resonance function of the insulator is disclosed.

Nondestructive inspection method of insulator using frequency resonance function

Disclosed herein is a robot mechanism for inspection of a live-line suspension insulator string. A robot body of the robot mechanism reciprocates along the live-line suspension insulator string and includes upper and lower robot frames configured to encircle the insulator string, a battery module provided to either end of the robot body, an actuation module for moving the robot body along the insulator string, an inspection module for electrically inspecting an insulator, a connection module for coupling the robot body to an installation/dismantlement mechanism, a wing opening/closing module for manually separating the robot body from the insulator string, a measurement module for measuring electrical properties of the insulator, a controller for controlling operation of the robot body, and a crack detection unit for detecting cracks formed in the insulator.

Robot mechanism for inspection of live-line suspension insulator string

A neutron flux mapping system for a nuclear reactor including: drivers each including a geared motor, a helical gear driven by the geared motor, and a storage reel adapted to supply, to the helical gear, a detector cable carrying a detector; and a double indexing path selector unit including upper and lower fixed plates, a fixed shaft, an outer path selector rotatably mounted to the upper fixed plate, and inner path selectors. The outer path selector includes an upper rotating plate rotatably mounted to the upper fixed plate while carrying a drive unit for rotating the outer path selector about the fixed shaft, and a control unit for controlling the drive unit, and a lower rotating plate connected to the upper rotating plate. Each inner path selector includes a hollow rotating shaft rotatably mounted between the upper and lower rotating plates, a path select tubing connected to the rotating shaft to rotate along with the rotating shaft, and a disc mounted to a lower end of the rotating shaft, and provided with a plurality of circumferentially-arranged paths.

Growing community of inventors

Daejeon, South Korea

Byung-Hak Cho