摘要:
Disclosed is a cage-type copolymer in which a cage structure is incorporated in its main chain. Also disclosed is a curable resin composition comprising the said copolymer. Specifically disclosed is a curable cage-type silicone copolymer with a constituent unit represented by general formula (1) Y—[Z—(O1/2—R22SiO1/2)a—(R1SiO3/2)n—(O1/2)b]—Z—Y: wherein R1 and R2 each is a vinyl group, an alkyl group, a phenyl group, a (meth)acryloyl group, an allyl group, or an oxirane ring-containing group, Z is a divalent group represented by the following general formula (2) wherein R3 is a hydrogen atom, a vinyl group, an alkyl group, a phenyl group, a (meth)acryloyl group, an allyl group, or an oxirane ring-containing group, and Y is any one of the groups represented by the following general formula (3) [(R4O)R22SiO1/2]a—[R12SiO3/2]n—[O1/2]—, general formula (4) [R4O1/2]b—[R1SiO3/2]n—[O1/2—R22SiO1/2]—, general formula (5) (R4O1/2)—, and general formula (6) (R23SiO1/2)— wherein R4 is a hydrogen atom, a methyl group, or an ethyl group.
摘要:
Disclosed is a cage-type copolymer in which a cage structure is incorporated in its main chain. Also disclosed is a curable resin composition comprising the said copolymer. Specifically disclosed is a curable cage-type silicone copolymer with a constituent unit represented by general formula (1) Y—[Z—(O1/2—R22SiO1/2)a—(R1SiO3/2)n—(O1/2)b]—Z—Y: wherein R1 and R2 each is a vinyl group, an alkyl group, a phenyl group, a (meth)acryloyl group, an allyl group, or an oxirane ring-containing group, Z is a divalent group represented by the following general formula (2) wherein R3 is a hydrogen atom, a vinyl group, an alkyl group, a phenyl group, a (meth)acryloyl group, an allyl group, or an oxirane ring-containing group, and Y is any one of the groups represented by the following general formula (3) [(R4O)R22SiO1/2]a—[R12SiO3/2]n—[O1/2]—, general formula (4) [R4O1/2]b—[R1SiO3/2]n—[O1/2—R22SiO1/2]—, general formula (5) (R4O1/2)—, and general formula (6) (R23SiO1/2)— wherein R4 is a hydrogen atom, a methyl group, or an ethyl group.
摘要:
An ultrasonic flaw detection apparatus is equipped with a probe which is driven by a transmission signal and which transmits an ultrasonic pulse at an angle with respect to a surface of a test object. The probe receives an ultrasonic pulse, which has been reflected by a defect in the test object, as an echo. The apparatus further includes a scanner for scanning the probe over a predetermined scanning zone on the test object and for outputting a spatial position of the probe. The apparatus is further equipped with a transmitter-receiver which has a transmitter for generating a transmission signal and outputting the transmission signal to the probe, a position detector for receiving a spatial position of the probe from the scanner, and a signal processor for detecting the defect according to the stored spatial position of the probe and the stored echo, taking the spread of an ultrasonic beam attributable to diffraction into account. The apparatus makes it possible to improve the accuracy of an examination based on an ultrasonic wave through a test object, and also to improve the capability of detection and the accuracy of measurement of the shape, size, position, etc. of an acoustically disconnected portion (defect).
摘要:
An ultrasonic detecting apparatus which includes a sequence generating means and a transmission signal generating means for generating a transmission signal corresponding to the sequence. The detecting apparatus also includes a transmitting means to transmit waves, which may be ultrasonic waves, to an object and a receiving means for receiving an echo corresponding to the transmission signal. A correlation operation means performs a correlation operation with respect to the echo. In another general aspect, the sequence generating means may generate more than one sequence, some of whose auto-correlation functions produce substantially zero sidelobe in the summed result. In a further general aspect, the sequence generating means generates two or more sequences, with each of the sequences being different from the others and having substantially the same auto-correlation function as the others.
摘要:
An ultrasonic detecting apparatus which includes a generator which generates more than three transmission signals. The detecting apparatus also includes a transmitter/receiver which transmits waves, which may be ultrasonic waves, to an object and receives echoes corresponding to the transmission signal. A correlator performs correlation operations with respect to the echoes. The results of the correlation operations are processed to obtain a signal with substantially zero side lobes.
摘要:
A blank feeder for a packaging machine for use with folded flat blanks unfoldable into tubes of square to rectangular cross section and having different lengths to form containers of different capacities. The feeder includes a magazine for containing a stack of flat container blanks. The magazine comprises an inclined frame defining a downward delivery opening and having opposite side members, an upper member and a lower member, a pair of blank unfolding pawls provided at the bottom surfaces of the upper and lower frame members and partly projecting into the opening, and a pair of movable blank supports reciprocatingly movable between an upper position above the frame and a lower position below the frame through the opening. The upper frame member is movable by a hydraulic cylinder longitudinally of the frame to adjust the distance between the unfolding pawls to the length of the blank. Blanks are supplied by an elevator to the movable blank supports in the upper position and then placed on fixed blank supports at the frame bottom by lowering the movable supports. When the movable supports are raised to the upper position to remove the remaining blanks from the magazine after packaging, the blanks are transferred from the movable supports onto movable guide rods brought to a fallen position from an upright position on the lower frame member.
摘要:
An ultrasonic flaw inspecting apparatus is provided in which the transmission signals comprising N number of the binary code sequences having sharp autocorrelation functions are input to an object to be inspected by a single transducer for transmission and the reflected signals are received by N number of transducers for reception. The N number of transducers for reception are connected and placed over each other so that the direction of respective polarization is inverted in terms of the time order of the binary code of the sequence.
摘要:
An automatic flaw detection apparatus comprises a supporting frame; a hollow shaft which is supported on said frame in a freely rotatable manner through a bearing, and through the interior of which passes a material to be inspected; a holder disposed within said hollow shaft, and extending in the longitudinal direction of the axis of said hollow shaft, and rotating in association with said hollow shaft; sensing means incorporated in said holder to detect any defect in said material to be probed; and a signal transmission device interposed between said hollow shaft and said supporting frame, and to transmit the flaw detection signal from said sensor means to outside.
摘要:
An inspection apparatus utilizing a pulse compression technique is described which comprises a signal generator, a transmission/reception probe; first and second correlators and an adder. The signal generator generates a composite transmission signal consisting of signals Sap(t), Saq(t), Sbp(t) and Sbq(t) respectively based on a basic unit signal ga(t) and a sequence {p}, the signal ga(t) and a sequence {q}, a basic unit signal gb(t) and the sequence {p}, and the signal gb(t) and the sequence {q}, to the probe to transmit the composite transmission signal to a target. The first correlator performs a correlation operation of echo signals Rap(t), Raq(t), Rbp(t) and Rbq(t) corresponding to the signal Sap(t), Saq(t) and Sbq(t) by utilizing reference signals Ua(t) and Ub(t) based on the sequences to provide results Caap(t), Caaq(t), Cbbp(t) and Cbbq(t). The second correlator performs a correlation operation of the results Caap(t), Caaq(t) Cbbp(t) and Cbbq(t) by utilizing the sequences {p} and {q} to provide compressed pulses Caapp(t), Caaqq(t), Cbbpp(t) and Cbbqq(t). These pulses are summed up at the adder to provide a composite compressed pulse C having the large amplitude main lobe and small amplitude side lobes.
摘要:
A method of reliably detecting flaws in a thick wall steel pipe with an ultrasonic beam in which flaws of the internal surface of the pipe are detected using a shear wave mode. The transmitting probe is disposed slantingly relative to both the longitudinal and transverse directions of the pipe so that the shear wave emitted therefrom is incident onto the pipe at a refraction angle of 35 to 70 degrees, whereby the beam inside the walls of the pipe is made to impinge on surface flaws of the inner surface of the pipe at an angle in the same range.