摘要:
The present invention relates to a position detection device for a mobile robot, including a light-emitting element for emitting light, a light reception element on which light transferred from a bottom, of the light emitted from the light-emitting element and then reflected from an obstacle, is focused, and a signal processing unit for calculating a distance between a position where the light incident on the light reception element is focused and the obstacle. A position detection method using a mobile robot may include operating a robot cleaner, receiving light transferred from a bottom, of light emitted from the robot cleaner and then reflected from an obstacle, and detecting a distance between the robot cleaner and the obstacle from which the light is reflected, determining whether the distance between the robot cleaner and the obstacle increases, and determining whether the robot cleaner has approached the obstacle.
摘要:
A memory chip includes a receiver, a clock phase shifter, an error detector, and a controller. The receiver receives a test signal having a plurality of random data bits. The clock phase shifter shifts the phase of a clock signal to one of first through nth phases (n is a natural number). The controller controls the clock phase shifter to sequentially increase the phase of the clock signal from the first phase when the error detector determines the data bit sampled in synchronization with the clock signal has an erro has an error. The controller controls the clock phase shifter to sequentially decrease the phase of the clock signal from the nth phase when none of the plurality of data bits sampled in synchronization with the clock signal having a kth phase (k is a natural number greater than 1 and smaller than n−1) have an error.
摘要:
A memory chip includes a receiver, a clock phase shifter, an error detector, and a controller. The receiver receives a test signal having a plurality of random data bits. The clock phase shifter shifts the phase of a clock signal to one of first through nth phases (n is a natural number). The controller controls the clock phase shifter to sequentially increase the phase of the clock signal from the first phase when the error detector determines the data bit sampled in synchronization with the clock signal has an erro has an error. The controller controls the clock phase shifter to sequentially decrease the phase of the clock signal from the nth phase when none of the plurality of data bits sampled in synchronization with the clock signal having a kth phase (k is a natural number greater than 1 and smaller than n−1) have an error.
摘要:
A semiconductor memory device utilizing a data coding method in an initial operation. The semiconductor memory device includes a plurality of counters communicating with a data coding unit. The counters count the number of data bits and flag information data bits in a first logic state in a first data group which includes at least one data bit and second through nth groups each including at least one data bit and flag information. The data coding unit selectively applies a first operation mode and a second operation mode to each of the first through nth data groups and codes the data of each of the first through nth data groups. The first operation mode codes the data of each of the first through nth data groups such that the counted number of data bits in the first logic state in each of the first through nth groups is minimized. The second operation mode codes the data of each of the first through nth groups such that the difference between the number of data bits and flag information data bits in the first logic state and the number of data bits and flag information data bits in a second logic state in the first through nth data groups is minimized. In this manner, the semiconductor memory device and the associated data coding method prevents the initial logic state of data from being changed due to a voltage drop in the initial operation of the device.
摘要:
A system is provided for returning a robot to a charger. In this regard, a charger is configured to provide a plurality of docking guide regions by outputting at least one guide signal superposed with at least one other signal to form a return region. Further, the robot is configured to return to the charger at a return speed by detecting the return region.
摘要:
A moving robot and its operation method are disclosed. The moving robot includes a moving body/object sensing unit that senses a movement of a human body within a certain distance, a traveling unit that controls a traveling speed and direction, and a controller that outputs a control signal for controlling the traveling speed according to pre-set data to the traveling unit. In a state that the moving robot performs a cleaning operation while moving its locations, when a movement of a human body is sensed by the moving body/object sensing unit, the traveling speed is reduced to allow the user to easily control the external operation, and the efficiency can be increased by utilizing the moving body/object sensing unit for operations of different modes.
摘要:
A semiconductor memory device including: first and second memory cell arrays each including at least one word line, at least three bit lines, and memory cells; and a sense amplifier area disposed between the first and second memory cell arrays and including a sense amplifier circuit for sensing and amplifying data of the memory cells, wherein the at least three bit lines of the first memory cell array and the at least three bit lines of the second memory cell array extend in a first direction and the at least three bit lines of the first and the second memory cell arrays are respectively connected to data lines disposed in a second direction, and wherein a bit line located between two of the at least three bit lines of each of the first and the second memory cell arrays is connected to an outermost data line of the data lines.
摘要:
A block-based image denoising method includes determining similarities between a current block and reference blocks within a search range around the current block, from among certain-sized blocks divided from an input image; determining weights of the reference blocks with respect to the current block based on the similarities; and generating resultant blocks by denoising the current block with respect to every block of the input image based on the weights of the reference blocks.
摘要:
Disclosed is a mobile robot charge station return system, which may return a mobile robot to a charge station exactly and rapidly according to a charge station position guidance signal emitted from the charge station. The mobile robot charge station return system includes a charge station for transmitting charge station position guidance signals to different areas in such a way that different emitting distances of the charge station position guidance signals change according to a predetermined time period; and a mobile robot for receiving the charge station position guidance signals, calculating direction and distance information, and returning to the charge station according to the calculated direction and distance information.
摘要:
A semiconductor memory device including: first and second memory cell arrays each including at least one word line, at least three bit lines, and memory cells; and a sense amplifier area disposed between the first and second memory cell arrays and including a sense amplifier circuit for sensing and amplifying data of the memory cells, wherein the at least three bit lines of the first memory cell array and the at least three bit lines of the second memory cell array extend in a first direction and the at least three bit lines of the first and the second memory cell arrays are respectively connected to data lines disposed in a second direction, and wherein a bit line located between two of the at least three bit lines of each of the first and the second memory cell arrays is connected to an outermost data line of the data lines.