Abstract: The disclosure relates to an arc fault circuit interrupt capable of detecting an arc fault and a method of controlling the device. The arc fault circuit interrupt according to the disclosure is shipped in a factory reset state in which all functions are initialized after a test to check for functional abnormalities, and when receiving an update instruction from an authorized administrator after being installed in the field, receives an update file from a management device such as an energy management system to proceed with a firmware update and activates an arc fault detection function, thereby having the effect of preemptively preventing unauthorized copying of the arc fault circuit interrupt.

Abstract: Provided are a method and apparatus for checking plausibility of analog input data. The method may include selecting input data corresponding to a channel selection signal, based on a multiplexer, and generating digital data by converting the input data into a digital form, based on an analog-to-digital (A/D) converter. The method may include determining a presence or absence of a first error in the digital data, based on a storage position of the digital data. The method may include determining a presence or absence of a second error in the digital data, based on a comparison between the digital data and a preset threshold value. The method may include determining an error of at least one of the multiplexer or the A/D converter, based on the presence or absence of the first error and the presence or absence of the second error.

Abstract: The present disclosure relates to a piezoelectric device, and more particularly, to a piezoelectric device including: a piezoelectric actuator; a displacement transmission structure disposed on the piezoelectric actuator; and a displacement amplification structure disposed between the piezoelectric actuator and the displacement transmission structure. Here, the displacement amplification structure includes: a first displacement amplification structure and a second displacement amplification structure, which cross each other; and a fixing pin that passes through the first displacement amplification structure and the second displacement amplification structure to connect the first displacement amplification structure and the second displacement amplification structure. Also, each of one end of the first displacement amplification structure and one end of the second displacement amplification structure may be fixed on the piezoelectric actuator.

Abstract: The present disclosure relates to a device for playing an acoustic sound and a touch sensation, and more particularly, to a device for emitting a sound to a front surface of a speaker and playing a touch sensation feedback to a rear surface of the speaker through a driving modulation using two or more speakers while simultaneously concentrating an acoustic pressure generated according to a vibration of a membrane of the speaker to a surface of a module through a movement pipe when an audio signal is applied.

Abstract: The present disclosure relates to a device for playing an acoustic sound and a touch sensation, and more particularly, to a device for emitting a sound to a front surface of a speaker and playing a touch sensation feedback to a rear surface of the speaker through a driving modulation using two or more speakers while simultaneously concentrating an acoustic pressure generated according to a vibration of a membrane of the speaker to a surface of a module through a movement pipe when an audio signal is applied.

Abstract: The present disclosure relates to a piezoelectric device, and more particularly, to a piezoelectric device including: a piezoelectric actuator; a displacement transmission structure disposed on the piezoelectric actuator; and a displacement amplification structure disposed between the piezoelectric actuator and the displacement transmission structure. Here, the displacement amplification structure includes: a first displacement amplification structure and a second displacement amplification structure, which cross each other; and a fixing pin that passes through the first displacement amplification structure and the second displacement amplification structure to connect the first displacement amplification structure and the second displacement amplification structure. Also, each of one end of the first displacement amplification structure and one end of the second displacement amplification structure may be fixed on the piezoelectric actuator.