Abstract: An image forming apparatus is provided. The image forming apparatus includes a print engine to perform an image forming job, a motor to drive the print engine, a driving circuit, to supply a power to the motor, and including a sensor to sense an amount of current of the power supplied to the motor, and a processor to analyze a frequency component of the current supplied to the motor by using the amount of current sensed by the sensor for a predetermined time, and to determine an occurrence of a jam based on the analyzed frequency component.

Abstract: A method for verifying a drone included in an industrial Internet of Things (IIoT) system, using a petri-net modeling is disclosed. In an embodiment, the method includes a step of modeling the IIoT system as a hierarchical petri-net (modeling step); and a step of verifying whether the drone has security vulnerability on the basis of the hierarchical petri-net model (verification step), wherein the verification step can determine that a drone has security vulnerability when at least one of a plurality of determination factors provided as places to the hierarchical petri-net model determines that the drone is operating abnormally.

Abstract: An image forming apparatus includes a print engine, a DC motor, a driving circuit, and a processor. The print engine forms an image. The DC motor drives the print engine. The driving circuit provides a current to the DC motor, and senses a variation of the current provided to the DC motor. The processor calculates a temperature of the DC motor based on the variation of the current flowing through the DC motor, and controls an operation of the image forming apparatus based on the calculated temperature.

Abstract: An image forming apparatus includes a printer engine, a sensor and a processor. The printer engine forms an image. The sensor outputs vibration information associated with a vibration of the printer engine. The processor determines whether at least one component of the printer engine has an abnormality based on the output vibration information.

Abstract: An image forming apparatus and an image forming method are provided. The image forming apparatus includes a printing engine to form an image, a step motor to drive the printing engine, a driving circuit to provide a constant current to the step motor and sense a voltage corresponding to a magnitude of the constant current provided to the step motor, and a processor to calculate a temperature of the step motor based on the voltage sensed by the driving circuit during an excitation period of the step motor and control an operation of the image forming apparatus based on the calculated temperature.

Abstract: An image forming apparatus is provided. The image forming apparatus includes a print engine to be used to perform an image forming job, a motor to start the print engine, a driving circuit to supply a power to the motor and to include a sensor to sense a size of current of the power supplied to the motor during an operation to perform the image forming job, and a processor to detect an occurrence of jam based on a size of current sensed by the sensor in a first time interval while the motor is driven and a size of current sensed by the sensor after a determined time from the first time interval.

Abstract: An example operating method of an image forming apparatus includes detecting a position change of a beam with respect to a certain color in a main scanning direction, based on a change in a detection time at which the beam with respect to the certain color is detected by a beam detecting apparatus in the main scanning direction, detecting a position change of the beam with In respect to the certain color in a sub-scanning direction, based on a change in a detection time at which the beam with respect to the certain color is detected by the beam detecting apparatus in the sub-scanning direction, and correcting a value of at least one parameter used for alignment between an image of a reference color and an image of the certain color, based on the position changes of the beam in the main scanning direction and the sub-scanning direction.

Abstract: An image forming apparatus includes a printer engine, a sensor and a processor. The printer engine forms an image. The sensor outputs vibration information associated with a vibration of the printer engine. The processor determines whether at least one component of the printer engine has an abnormality based on the output vibration information.

Abstract: An image forming apparatus includes a print engine, a DC motor, a driving circuit, and a processor. The print engine forms an image. The DC motor drives the print engine. The driving circuit provides a current to the DC motor, and senses a variation of the current provided to the DC motor. The processor calculates a temperature of the DC motor based on the variation of the current flowing through the DC motor, and controls an operation of the image forming apparatus based on the calculated temperature.

Abstract: An image forming apparatus is provided. The image forming apparatus includes a print engine to perform an image forming job, a motor to drive the print engine, a driving circuit, to supply a power to the motor, and including a sensor to sense an amount of current of the power supplied to the motor, and a processor to analyze a frequency component of the current supplied to the motor by using the amount of current sensed by the sensor for a predetermined time, and to determine an occurrence of a jam based on the analyzed frequency component.

Abstract: An image forming apparatus and an image forming method are provided. The image forming apparatus includes a printing engine to form an image, a step motor to drive the printing engine, a driving circuit to provide a constant current to the step motor and sense a voltage corresponding to a magnitude of the constant current provided to the step motor, and a processor to calculate a temperature of the step motor based on the voltage sensed by the driving circuit during an excitation period of the step motor and control an operation of the image forming apparatus based on the calculated temperature.

Abstract: An image forming apparatus is provided. The image forming apparatus includes a print engine to be used to perform an image forming job, a motor to start the print engine, a driving circuit to supply a power to the motor and to include a sensor to sense a size of current of the power supplied to the motor during an operation to perform the image forming job, and a processor to detect an occurrence of jam based on a size of current sensed by the sensor in a first time interval while the motor is driven and a size of current sensed by the sensor after a determined time from the first time interval.

Abstract: A method of providing information of a mobile communication terminal, and a mobile communication terminal for performing the method, are provided. The method includes determining whether a search command event has been generated during a call with a counterpart terminal, converting a voice signal received from a microphone into a text when the generation of search command event is determined to have been generated, identifying information matching the text in a memory, and sending the information to the counterpart terminal.

Abstract: An image forming apparatus may include an engine portion used to perform an image forming job, a step motor configured to start the engine portion, a driver including a resistor that measures current that flows to a coil of the step motor and is configured to provide a predetermined constant current to the step motor, and a drive controller configured to measure a load level of the step motor based on a voltage value of the resistor and to control the driver to provide the constant current that corresponds to the measured load level.

Abstract: An image forming apparatus is provided. The image forming apparatus includes an image former configured to perform an image formation; a brushless DC (BLDC) motor configured to start the image former; and a motor controller configured to receive a plurality of driving information from the BLDC motor and to perform a feedback control for the BLDC motor based on at least one of the plurality of received driving information, wherein the motor controller confirms a plurality of error items for the BLDC motor based on the plurality of received driving information.

Abstract: An image forming apparatus includes an engine unit to perform an image forming job; an engine control unit to control the operation of the engine unit; a brushless direct current (BLDC) motor to drive the engine unit; a sensor unit to sense electric angle information and driving velocity information of the BLDC motor; a communication interface to receive a digital control command with respect to the BLDC motor from the engine control unit; a driving signal unit to generate a driving signal to control the BLDC motor; and a digital control unit to control the operation of the driving signal unit in a digital phase locked loop (PLL) manner for feedback controls the BLDC motor, based on the received digital control command, the detected electric angle information and the driving velocity information and a digital gain value as a control factor with respect to the BLDC motor.

Abstract: An image forming apparatus includes an engine portion configured to perform image forming, a direct current (DC) motor configured to mechanically operate the engine portion, a driver including a resistor to measure current that flows to the DC motor according to the measured current and configured to provide a predetermined voltage to the DC motor, and a drive controller configured to measure a driving speed of the DC motor based on a voltage value of the resistor and to control the driver to provide a voltage that corresponds to the measured driving speed to the driver.

Abstract: Provided is an image forming apparatus including: a feeding unit configured to feed a recording medium; an image forming unit configured to form an image on the recording medium; a fuser configured to fuse the image formed on the recording medium; a discharging unit configured to discharge the recording medium; a motor configured to drive at least one of the feeding unit, the image forming unit, the fuser, and the discharging unit, and comprise a rotor including at least one pair of permanent magnets and a Hall sensor measuring a position of the permanent magnets; and a controller configured to drive the motor based on a signal received from the Hall sensor.

Abstract: An image forming apparatus, a control method for the same, and a motor state detector are provided. An aspect is to detect out-of-step of a motor using only an electric circuit configuration without additional mechanical devices, such as an encoder, a light-emitting device, and a light-receiving device, and to predict and prevent out-of-step of the motor. To this end, the image forming apparatus includes a motor state detector that acquires a current detection signal by detecting phase current of a motor and that generates an output signal in which a duty ratio in a current chopping section of the current detection signal is involved, and a controller that judges a normal state, out-of-step entry, and an out-of-step state of the motor based on the output signal of the motor state detector.

Abstract: A method and a system of managing information security for a mobile device in a restricted area based on location information regarding the mobile device are provided. The method includes receiving, by the mobile device, a request for the execution of an application program in a restricted area from a server managing the restricted area, executing, by the mobile device, the application program requested for execution when the program was set to be executable according to a security policy set to the restricted area, encrypting, by the mobile device, a file, created according to the execution of the application program, based on location information regarding the mobile device, and storing the encrypted file.