摘要:
There is provided an LED testing apparatus. An LED testing apparatus according to an aspect of the invention may include: a first lighting unit generating first light and irradiating the first light onto an LED having an encapsulant including a fluorescent material excited by the first light to emit light having a longer wavelength than the first light; a second lighting unit generating second light having a longer wavelength than the first light to irradiate the second light onto the LED; an image acquisition unit receiving the light emitted from the fluorescent material and the second light reflected off the LED to acquire images of the LED; and an LED state determination unit determining whether the LED is acceptable or defective using the images of the LED acquired by the image acquisition unit.
摘要:
The present invention relates to a system and method for guiding the walking directions of a blind person using RFID blocks and, more particularly, to a system and method for guiding the walking directions of a blind person using RFID blocks, wherein an RFID reader wirelessly senses RF tags embedded in the blocks so as to guide walking directions by means of vibrations, buzzer sounds, and voice messages for guiding entry/exit directions, according to the types of pedestrian zones when a blind person walks along the blocks. The guiding system comprises: RFID tags for guiding the walking of a blind person; a plurality of blocks embedded in sidewalks which are divided into a junction zone block, a junction neighboring zone block and a general pedestrian zone block; a walking cane for receiving pedestrian zone information from the RFID tags in the plurality of blocks and outputting vibrations, sound effects and voice messages for guiding walking directions. The walking cane comprises: an antenna for receiving the pedestrian zone information by means of the RFID tags and a wireless transceiver; and a control part for generating vibrations when the blind person passes a general pedestrian zone block, generating vibrations and buzzer sounds when the blind person passes a junction neighboring zone, outputting vibrations and a voice guiding message for indicating a junction zone block when the blind person passes, and outputting vibrations and a voice guiding message for entry/exit directions when the blind person passes the junction neighboring zone block via the junction zone block.
摘要:
The present invention provides a device and methods of use thereof for desalting a solution. The methods, inter-alia, make use of a device comprising microchannels, which are linked to conduits, whereby induction of an electric field in the conduit results in the formation of a space charge layer within the microchannel. The space charge layer provides an energy barrier for salt ions and generates an ion depletion zone proximal to the linkage region between the microchannel and the conduit. The method thus enables the removal of salt ions from the region proximal to the conduit and their accumulation in a region distant from the conduit, within the microchannel.
摘要:
The present invention provides a device and methods of use thereof for desalting a solution. The methods, inter-alia, make use of a device comprising microchannels, which are linked to conduits, whereby induction of an electric field in the conduit results in the formation of a space charge layer within the microchannel. The space charge layer provides an energy barrier for salt ions and generates an ion depletion zone proximal to the linkage region between the microchannel and the conduit. The method thus enables the removal of salt ions from the region proximal to the conduit and their accumulation in a region distant from the conduit, within the microchannel.
摘要:
The present invention provides a device and methods of use thereof in concentrating a species of interest and/or controlling liquid flow in a device. The methods make use of a device comprising a fluidic chip comprising a planar array of channels through which a liquid comprising a species of interest can be made to pass with at least one rigid substrate connected thereto such that at least a portion of a surface of the substrate bounds the channels, and a high aspect ratio ion-selective membrane is embedded within the chip, attached to at least a portion of the channels. The device comprises a unit to induce an electric field in the channel and a unit to induce an electrokinetic or pressure driven flow in the channel.
摘要:
The present invention provides a device and methods of use thereof in concentrating a species of interest and/or controlling liquid flow in a device. The methods make use of a device comprising a fluidic chip comprising a planar array of channels through which a liquid comprising a species of interest can be made to pass with at least one rigid substrate connected thereto such that at least a portion of a surface of the substrate bounds the channels, and a high aspect ratio ion-selective membrane is embedded within the chip, attached to at least a portion of the channels. The device comprises a unit to induce an electric field in the channel and a unit to induce an electrokinetic or pressure driven flow in the channel.
摘要:
The present invention relates to a system and method for guiding the walking directions of a blind person using RFID blocks and, more particularly, to a system and method for guiding the walking directions of a blind person using RFID blocks, wherein an RFID reader wirelessly senses RF tags embedded in the blocks so as to guide walking directions by means of vibrations, buzzer sounds, and voice messages for guiding entry/exit directions, according to the types of pedestrian zones when a blind person walks along the blocks. The guiding system comprises: RFID tags for guiding the walking of a blind person; a plurality of blocks embedded in sidewalks which are divided into a junction zone block, a junction neighboring zone block and a general pedestrian zone block; a walking cane for receiving pedestrian zone information from the RFID tags in the plurality of blocks and outputting vibrations, sound effects and voice messages for guiding walking directions. The walking cane comprises: an antenna for receiving the pedestrian zone information by means of the RFID tags and a wireless transceiver; and a control part for generating vibrations when the blind person passes a general pedestrian zone block, generating vibrations and buzzer sounds when the blind person passes a junction neighboring zone, outputting vibrations and a voice guiding message for indicating a junction zone block when the blind person passes, and outputting vibrations and a voice guiding message for entry/exit directions when the blind person passes the junction neighboring zone block via the junction zone block.
摘要:
The present invention relates to an electronic walking cane for the visually impaired which is adapted with an RFID reader to wirelessly detect RFID tags which are positioned as guides along footpaths with Braille blocks having embedded RFID tags. The present electronic walking cane comprises: a handle which is in the shape of a hollow tube within which a circuit board is installed; a plurality of connectors each having a tapering, hollow tubular structure which are sequentially mounted into each other such that the lower end of one connector is inserted into the upper end of the next connector; a coiled cable, consisting of a plurality of coated wires, with one end connected to said handle and the other end connected to the tip of the lowest of said plurality of connectors; an elastic member for preventing the twisting of said coiled cable, is inserted into the medial section of said coiled cable, with one end connected to said handle and the other end connected to the tip of the lowest of said plurality of connectors; a first and a second fastener which respectively fasten said handle to each of said plurality of connectors, and said coiled cable to said elastic member; and an insulating material having a cylindrical structure installed onto the inner surface of said plurality of connectors, which reduces noises which occur when said elastic member, said coiled cable and said plurality of connectors rub against each other with movement of said walking cane.
摘要:
The present invention provides a device and methods of use thereof in concentrating a species of interest and/or controlling liquid flow in a device. The methods make use of a device comprising a fluidic chip comprising a planar array of channels through which a liquid comprising a species of interest can be made to pass with at least one rigid substrate connected thereto such that at least a portion of a surface of the substrate bounds the channels, and a high aspect ratio ion-selective membrane is embedded within the chip, attached to at least a portion of the channels. The device comprises a unit to induce an electric field in the channel and a unit to induce an electrokinetic or pressure driven flow in the channel.
摘要:
An electrochemical system with reduced limiting-current behavior is disclosed. The electrochemical system is useful for fuel cells and bio-sensors. In part, the invention relates a method of reducing or eliminating limiting-current behavior in the operation electrochemical systems, in particular those with ion-selective membrane or electrochemical electrodes, by spatially reducing the convection near the membrane or the electrode. The invention further relates to electrochemical systems in which micropores, microarrays or pillar arrays are used to reduce convection in comparison to conventional systems without microarrays, micropores or pillar arrays.