CN1129804A

CN1129804A - Hand industrial supersonic scanning apparatus with a reflecting mirror

Info

Publication number: CN1129804A
Application number: CN 94116531
Authority: CN
Inventors: 魏兴; 车丕堂
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-10-05
Filing date: 1994-10-05
Publication date: 1996-08-28

Abstract

The hand ultrasonic scanner using two reflectors features that ultrasonic wave is emitted from its probe close to surface of workpiece toward rotary reflector above the probe and then reflected in the direction parallel to said surface to pyramidal reflector, where the ultrasonic is further reflected toward the workpiece, penetrating into the workpiece. Turning the rotary relfector can make ultrasonic do arc scanning in the workpiece and forward arc trace is considered as active scanning by computer. All the element is contained in an enclosed housing full of sound-conducting liquid, which has a window for passing ultrasonic wave but liquid.

Description

Hand industrial supersonic device with scanning mirror

The invention discloses two hand industrial ultrasonic scanning devices that catoptron scans of a kind of employing, be used for flaw detection and evaluation of material.

In the present prior art, hand held scanning device, but all be that probe is linked in the push and pull system of a measuring sonde position, the direct contact workpiece of popping one's head in, hand is held probe movement, simulates mechanical scanning motion.For example: the product of Dupont nondestructive detecting instrument company has adopted the rectangular coordinate push and pull system, the M-600 hand scanner of CANON has adopted the polar coordinates push and pull system, the similar products of each company have repeatedly been introduced on U.S.'s Non-Destructive Testing magazine " evaluation of material " 1993 volumes, but all nothing more than above dual mode, this mode staff is tired easily, and sweep trace is irregular, may omission, speed is slow, needs to place the space of link rod coordinate system system, and operation is convenient inadequately.

Scanister of the present invention does not have push and pull system, and is similar to handheld image scanner commonly used in the present computer industry.It is automatically on the direction of scanning, leans on people's hand propelled on the step direction of being expert at, or mechanical haulage, and track while scan is the arc section of translation, for computer imaging.This apparatus structure is compact, and sweep trace is even as hand size, and sweep velocity is fast, the efficient height.

Ultimate principle of the present invention is as follows:

Probe is pressed close to surface of the work, back to workpiece emission ultrasound wave, above probe, have individual sideling towards the plane rotating mirror of popping one's head in, rotating shaft is parallel with ultrasonic beam, and it is parallel surface of the work direction with ultrasonic reflections, is mapped on the fixing conical reflector of front, ultrasonic beam is reflected into once more towards the surface of the work direction, incide workpiece inside, when rotating mirror rotated, the ultrasonic beam that is reflected just scanned at the inner camber line that forms of workpiece.Computing machine is only got a part, as forward 100 the degree angles be the effective scanning scope, probe and all catoptrons are contained in the housing of a sealing, full of liquid in it, with conducted acoustic waves, the fan-shaped membrane window of an entrant sound is arranged in the place that ultrasound wave penetrates, and it passes through ultrasound wave, but stops liquid to spill.

Because adopt catoptron to scan, so littler than mechanical hand scan device volume, sweep trace is even, the speed height is easy to operate.

Below with reference to accompanying drawing and specific embodiments the present invention is done detailed description.

In the accompanying drawings, probe (1) is removable, is contained on the bottom (2), and towards housing (5) inside, axis is vertical with bottom (2), and through behind the electrode, cable is guided the terminal (3) of side into along bottom (2).Motor (4) is contained in housing (5) top, and motor shaft (6) inserts from the hole of housing (5) in the middle of the housing (5), and rotating mirror (7) is contained in that motor shaft (6) is gone up and probe (1) is coaxial.Conical reflector (8) is a part of circular conical surface, also coaxial with probe, and be fixed on the front in the housing (5), ultrasound wave sends from probe (1) at bottom (2) on one side at the end of the conical surface, be reflected into the direction on parallel workpiece (11) surface through rotating mirror (7), be mapped on the conical reflector (8) of front, be reflected as again, penetrate from window (9) towards workpiece (11) direction, enter workpiece (11) inside, shown in arrow (13).The interior full of liquid of housing (5) is with conducted acoustic waves.Window (9) can be used film (10) sealing, also can open wide.Knob (12) is used for manual adjustment beams incident point, and housing (5) is a rectangular parallelepiped cavity.

When rotating mirror (7) rotation, and wave beam is when being mapped in the scope of conical reflector (8), ultrasound wave just from window (9) penetrate and workpiece (11) in the formation camber line scan.The simultaneous computer sampling forms scan line.Hand propelled housing (5) just forms image, and image is made up of the circular arc of translation.In the occasion that image is had relatively high expectations, available constant speed draw-gear replaces hand propelled housing (5), or goes up installation at housing (5) and pass the measurement measuring mechanism, makes it to keep strict synchronism with computer imaging.

In a most frequently used embodiment of the present invention, rotating mirror (7) becomes miter angle towards probe (1) with probe (1) axis, the tapering of conical reflector (8) is a miter angle, circumferencial direction is 1/2 circular cone, and it is the end with bottom (2), the ultrasound wave that penetrates from window (9) this moment is perpendicular to workpiece (11) surface, obtains vertical incidence scanning.When the tapering that changes conical reflector (8), or during the angle of rotating mirror (7), the ultrasound wave that penetrates from window (9) obtains oblique incidence scanning with regard to oblique workpiece (11) inside that is mapped to.

Claims

1. by probe (1), bottom (2), rotating mirror (7), motor (4), the hand industrial supersonic device that conical reflector (8) and housing (5) are formed, wherein, probe (1) is installed on the bottom (2), fixes, removable, it is characterized in that: it is back to workpiece (11), and axis normal is in bottom (2), to rotating mirror (7) emission ultrasound wave; Rotating mirror (7) is in the top of probe (1), and it is characterized in that: its rotating shaft and probe (1) are coaxial, is directly installed on the motor shaft (6), and its reflecting surface is sideling towards probe (1); Conical reflector (8) is installed in the front in the housing (5), fixes, and it is characterized in that: the end of the conical surface, at bottom on one side, and is and coaxial with probe (1); On the bottom (2) below conical reflector (8) a fan-shaped window (9) is arranged, it is characterized in that: pasted layer of plastic film (10) in its outside, it can make ultrasound wave pass through, and makes housing (5) become sealing simultaneously, and housing has been full of the sound-guiding liquid body in (5).

2. scanister according to claim 1 is characterized in that: when requiring sound wave vertically to penetrate window (9), the angle of the reflecting surface of rotating mirror (7) and probe (1) axis is 45 degree, and the tapering of conical reflector (8) is 45 degree.