摘要:
An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.
摘要:
An image shooting device with a camera shake correction function is provided. The image shooting device is capable of avoiding the deterioration of image quality due to performing camera shake correction. An image shooting control unit of the image shooting device can be configured to select to take in either one piece of image data for ordinary image shooting or a plurality of pieces of image data for camera shake correction, on the basis of the determination result of a determination unit. It also can be configured to take in both one piece of image data for ordinary image shooting and a plurality of pieces of image data for camera shake correction.
摘要:
A transmission probe and a reception probe for transmitting and receiving a wideband ultrasonic wave are provided. Each time when the locations of the probes and are moved, a received wave Gj(t) is obtained. Based on a spectrum Fj(f) corresponding to the received wave Gj(t), a narrowband spectrum FAj(f) is extracted. A component wave GAj(t) corresponding to the narrowband spectrum FAj(f) is found by inverse Fourier transformation. A longitudinal wave primary resonance frequency f1 having a relationship with a thickness W (mm) of an inspection target and a primary resonance frequency fS1 of a transverse wave generated by mode conversion are calculated. A comparative display of the component waves GAj(t) is presented using f1, fS1 and sizing coefficients ns1, ns2, ns3 and ns4 for high precision inspection. Based on the measurement point which shows a wave generation in the comparative screen of the component waves GAj(t), it is determined that there is a flaw Z at a certain position inside the inspection target immediately below a line segment connecting the transmission probe and the reception probe.
摘要:
An electric power feed structure for a superconducting apparatus, which is used to input or output electric power between the cryogenic-temperature side and the room-temperature side, comprises a coolant vessel containing a superconducting section provided in the superconducting apparatus, a vacuum thermal insulation vessel arranged to surround the outer periphery of the coolant vessel, and a feed conductor part having one end arranged in the room temperature side and having the other end connected to the superconducting section. The feed conductor part is divided into a cryogenic-temperature side conductor connected to the superconducting section and a room-temperature side conductor arranged in the room temperature side such that the cryogenic-temperature side conductor and the room-temperature side conductor can be detachably attached to each other. Thus, provided are the electric power feed structure for a superconducting apparatus and a superconducting cable line equipped with the electric power feed structure in which the electric power fed between the cryogenic-temperature side and the room-temperature side can be easily varied by changing an effective conductor cross-sectional area.
摘要:
A superconducting cable line includes a heat insulation pipe for a fluid for transporting a fluid having a temperature lower than an ordinary temperature and a superconducting cable housed in the heat insulation pipe for a fluid. The superconducting cable including a cable core in a heat insulation pipe for a cable is housed in the heat insulation pipe for a fluid to make a temperature difference between the inside and outside of the heat insulation pipe smaller than that in a situation of laying in an atmosphere. In addition, the superconducting cable has a double heat insulation structure formed with the heat insulation pipe for a cable and the heat insulation pipe for a fluids. Therefore, the superconducting cable line can effectively reduce heat intrusion from the outside into the cable.
摘要:
The invention offers a superconducting cable easy to form a twisted structure even when a plurality of cable cores are used and a DC transmission system incorporating the superconducting cable. A superconducting cable 1 has a structure formed by twisting together two types of cable cores (two first cores 2 and one second core 3) having different structures and then housing them in a heat-insulated pipe 7. The first cores 2 each have a first superconducting layer 2a, to be used either as an outward line or for the transmission for a pole in DC transmission, and have no superconducting layer other than the first superconducting layer 2a. The second core 3 has a second superconducting layer 3a, to be used as a return line or neutral line in DC transmission, and has no superconducting layer other than the second superconducting layer 3a. The second superconducting layer 3a has an inner diameter larger than the outer diameter of the first superconducting layer 2a.
摘要:
The present invention discloses a direct electric current superconducting cable having a core and a plurality of superconducting layers provided over the core with end portions of the superconducting layers exposed in a step-by-step manner from an outer layer to an inner layer and connected individually to outgoing conductors. The superconducting layers are insulated from each other. An insulating fixing member is used to support the core and the outgoing conductors. An electrical insulation layer, a return-current conductor layer and an insulating protective layer in that order surrounds the outermost superconducting layer.
摘要:
A superconducting cable includes: a cable core having a superconducting conductor; a thermal insulation pipe accommodating the cable core and functioning as a forward path of a coolant channel; and a coolant return pipe disposed beside the cable core in the thermal insulation pipe and functioning as a backward path of the coolant channel. A coolant is passed through a space formed between the thermal insulation pipe and the cable core/the coolant return pipe, and cools the cable core and the coolant return pipe. The coolant that has cooled the cable core, etc., returns through the coolant return pipe. Thus, the heat loss of a coolant in the superconducting cable can be minimized, and the space needed for coolant piping can be made compact.
摘要:
While a transmitting transducer (2a) for transmitting an ultrasonic wave and a receiving transducer (2b) for receiving an ultrasonic wave are moved within a predetermined circular region (7) on a surface of a material being measured, ultrasonic waves are transmitted and received 10,000 times. Then, arithmetic averaging is performed every time an ultrasonic wave is received, on the ultrasonic wave and ultrasonic waves that have been received until then. For example, the aforementioned predetermined frequency is given by ((n±(½))×(106×v/&Dgr;L))(Hz), where &Dgr;L is a variation in distance between the transmitting transducer and the receiving transducer, v is a transmission velocity of an ultrasonic wave transmitting in a material being detected, and n is a natural number. Consequently, it is possible to detect, with high accuracy, the thickness of a concrete material having a narrow width and a thick thickness, the thickness of the covering of a reinforcing bar and the diameter thereof, the depth of a crack and the like.
摘要:
A recording method ejects ink by thermal energy produced by a heat generating element of a recording head in response to a drive signal. The method includes the step of controlling an amount of ejection of the ink by a temperature control for the recording head including at least heating of the recording head, when a temperature of the recording head is not higher than a predetermined first temperature. The method further includes the steps of controlling the amount of ejection of the ink by changing a waveform of the drive signal for ejecting ink in accordance with the temperature of the recording head when the temperature of the recording head is higher than the first temperature and not higher than a second temperature, and fixing the waveform of the drive signal when the temperature of the recording head is higher than the second temperature.