EP0189137A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ultrasonic flaw detecting system
Assignee: Hitachi Construction Machinery Co Ltd
•
Filing: 1986-01-17
•
Granted: —
•
Expires: 2006-01-17
Abstract
Abstract A supersonic flaw detecting system (2) has a probe (4) adapted to emit a supersonic wave towards an object (D) to be inspected, a scanning device (6) for causing a relative movement between the probe and the object in two orthogonal directions, a pulser-receiver (20) adapted to supply pulses to the probe and receive the supersonic wave from the object and produce an electric signal indicative thereof, a signal processing device (22) for converting the electric signal from the pulser-receiver into an image data signal fro a C-scope display, an oscilloscope (24) for conducting an A-scope display of the electric signal from the pulser-receiver, and a monitor T.V. (34) having a screen for conducting the C-scope display of the image data signal from the signal processing device. A image memory (32c) is connected to the monitor T.V. (34) and has addresses corresponding to the coordinate values of a coordinate system assumed on the screen of the monitor T.V., and an operation device (38) is adapted to be operated by an operator for accessing a desired one of the addresses in the image memory (32c) to display position indicator or cursor (K) on the screen at a coordinate position corresponding to the accessed address. A control unit (32a, 36) is connected to the scanning device (6), the signal processing device (22), the image memory (32c) and the operation device (38), and operative to write, when the probe (4) and object (D) are relatively moved by the scanning device (6), the image data carried by the image data signal from the signal processing device (22) at a cor-
Inventors
- 👤 Yoshihiko Takishita
- 👤 Toshio Nonaka
- 👤 Yasuo Hayakawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 04:16
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; B; B82; B82Y; B82Y15/00; G01N29/04; G01N29/06; G01N29/0609; G01N29/0618; G01N29/0627; G01N29/0645; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02854
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
434 words
A supersonic flaw detecting system (2) having a probe (4) adapted to emit a supersonic wave towards an object (D) to be inspected, scanning means (6) for causing a relative movement between said probe and said object in two orthogonal directions, a pulser-receiver (20) adapted to supply pulses to said probe and receive the supersonic wave from said object and produce an electric signal indicative thereof, signal processing means (22) for converting said electric signal from said pulser-receiver into an image data signal fro a C-scope display, oscilloscope means (24) for conducting an A-scope display of said electric signal from said pulser-receiver, and a monitor T.V. (34) having a screen for conducting the C-scope display of said image data signal from said signal processing means, characterized in that said supersonic flaw detector comprises: image memory means (32c) connected to said monitor T.V. (34) and having addresses corresponding to the coordinate values of a coordinate system assumed on the screen of said monitor T.V.; operation means (38) adapted to be operated by an operator for accessing a desired one of the addresses in said image memory means (32c) to display position indicating means (K) on the screen of said monitor T.V. (34) at a coordinate position corresponding to the accessed address; and control means (32a, 36) connected to said scanning means (6), said signal processing means (22), said image memory means (32c) and said operation means (38), and operative to write, when said probe (4) and object (D) are relatively moved by said scanning means, the image data carried by said image data signal from said signal processing means at a corresponding address in the image memory means at each pitch (AS) which has been determined such that the number of data pickups during the relative movement between said probe and object coincides with the number of the corresponding addresses in said image memory means, to thereby cause C-scope display of the image data to be effected on the screen of said monitor T.V.; and to compute, when said position indicating means is displayed on said screen by said operation means, the amount (Xm, Ym) of operation of said scanning means necessary for locating said probe relative to said object at a position corresponding to said position indicating means on the screen of said monitor T.V., from said pitch and the address in said image memory means accessed by said operation means, and operate said scanning means by the thus computed amount to locate said probe at said corresponding position, thereby permitting A-scope display to be effected at such a position on said oscilloscope means.
Claim 2
Dependent Claim
434 words
A supersonic flaw detecting system (2) having a probe (4) adapted to emit a supersonic wave towards an object (D) to be inspected, scanning means (6) for causing a relative movement between said probe and said object in two orthogonal directions, a pulser-receiver (20) adapted to supply pulses to said probe and receive the supersonic wave from said object and produce an electric signal indicative thereof, signal processing means (22) for converting said electric signal from said pulser-receiver into an image data signal fro a C-scope display, oscilloscope means (24) for conducting an A-scope display of said electric signal from said pulser-receiver, and a monitor T.V. (34) having a screen for conducting the C-scope display of said image data signal from said signal processing means, characterized in that said supersonic flaw detector comprises: image memory means (32c) connected to said monitor T.V. (34) and having addresses corresponding to the coordinate values of a coordinate system assumed on the screen of said monitor T.V.; operation means (38) adapted to be operated by an operator for accessing a desired one of the addresses in said image memory means (32c) to display position indicating means (K) on the screen of said monitor T.V. (34) at a coordinate position corresponding to the accessed address; and control means (32a, 36) connected to said scanning means (6), said signal processing means (22), said image memory means (32c) and said operation means (38), and operative to write, when said probe (4) and object (D) are relatively moved by said scanning means, the image data carried by said image data signal from said signal processing means at a corresponding address in the image memory means at each pitch (AS) which has been determined such that the number of data pickups during the relative movement between said probe and object coincides with the number of the corresponding addresses in said image memory means, to thereby cause C-scope display of the image data to be effected on the screen of said monitor T.V.; and to compute, when said position indicating means is displayed on said screen by said operation means, the amount (Xm, Ym) of operation of said scanning means necessary for locating said probe relative to said object at a position corresponding to said position indicating means on the screen of said monitor T.V., from said pitch and the address in said image memory means accessed by said operation means, and operate said scanning means by the thus computed amount to locate said probe at said corresponding position, thereby permitting A-scope display to be effected at such a position on said oscilloscope means.
Claim 3
Dependent Claim
79 words
A supersonic flaw detecting system according to Claim 1, wherein said operation means (38) is further adapted to set the scanning range (Xs, Ys) of said probe (4) relative to said object, and said control means (32a) stores beforehand the number of data pickups which coincides with the number of the corresponding addresses in said image memory means (32c), and is operative to compute said pitch (AS) from said number of data pickups and said scanning range as set.
Claim 4
Dependent Claim
100 words
A supersonic flaw detecting system according to Claim 1, wherein said control means (36) is further operative to compute, when the relative movement between said probe (4) and said object (D) caused by said scanning means (6) is completed, the amount (Xe, Ye) of operation of said scanning means necessary for returning said probe to the initial position, from said pitch (AS) and the address in said image memory means (32c) in which the last image data has been written, and to operate said scanning means by the thus computed amount to automatically return said probe to said initial position.
Claim 5
Dependent Claim
56 words
A supersonic flaw detecting system according to any one of claims 1 - 3, further comprising data pickup timing means (30) connected to said scanning means (6), control means (32a) and said signal processing means (22) for instructing said signal processing means to output said image data signal at the timing of each said pitch (AS).
Claim 6
Dependent Claim
172 words
A supersonic flaw detecting system according to Claim 4, wherein said scanning means (6) includes, a first motor (16a) and a second motor (16b) for effecting the relative movement in one (X) and the other (Y) of two orthogonal directions, respectively, and a first encoder (18a) and a second encoder (18b) connected to said first motor and said second motor, respectively, for producing pulse signals in proportion in number to the amounts of rotation of the respective motors; said data pickup timing means includes a frequency divider (30) connected between said first encoder and said signal processing means (22) for demultiplying said pulse signals from said first encoder and delivering trigger signals to said signal processing means at timings obtained as a result of the demultiplication; and said control means (32a) is operative to divide said pitch (AS) by the pulse width (P) of said pulse signal from first encoder to compute the number of demultiplication (Xd), and to instruct said frequency divider to effect the demultiplication by the thus computed number.
Claim 7
Dependent Claim
197 words
A supersonic flaw detecting system according to Claim 5, wherein said control means (32a, 36) is operative to divide X direction distance (Xs) of the set scanning range (Xs, Ys) by the pulse width (P) of said encoder pulse signal to compute the number of pulses (Xc) of said first encoder (18a) necessary for effect the relative movement by said set distance in X direction and to operate said first motor (16a) until said pulse number is counted; to divide Y direction distance (Ys) of the set scanning range by said pitch (AS) to compute the number of data samples (Yp) necessary for covering the Y direction distance (Ys) of said set scanning range and to operate said first motor (16a) such that the relative movements in X direction and in -X direction are alternatingly repeated until said data sample number is counted; and to operate, each time the relative movement in X or -X direction is completed, said second motor (16b) to effect the relative movement in Y direction until the number of the encoder pulses coinciding with the number of demultiplication (Xd) are counted, and thereafter initiate the next movement in -X or X direction.
Claim 8
Dependent Claim
104 words
A supersonic flaw detecting system according to Claim 5, wherein said control means (36) is operative to multiply the X coordinate value (Xaa - Xa) and the Y coordinate value (Yaa - Ya) of the address in said image memory means (32c) set by said position indicating means (K) with said number of demultiplication (Xd) to compute the numbers of pulses (Xm, Ym) of said first and second encoders (18a, 18b) necessary for locating said probe (4) at the position corresponding to said position indicating means (K) to thereby determine the amount of operation of said scanning means (6) necessary for said A-scope display.
Claim 9
Dependent Claim
100 words
A supersonic flaw detecting system according to Claim 5, wherein said control means (36) is operative to multiply the X coordinate value (Xa) and the Y coordinate value (Ya) of said address in said image memory means (32c) in which the last image data is written with said number of demultiplication (Xd) to compute the numbers of pulses (Xe, Ye) of said first and second encoders (18a, 18b) necessary for returning said probe (4) to said initial position to thereby determine the amount of operation of said scanning means (6) necessary for automatically returning said probe to said initial position.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.