General-purpose coordinate device for manual defect detector

FIELD: measurement equipment.

SUBSTANCE: invention relates to non-destructive testing devices and is intended to determine coordinates of an inspection sensor when searching defects. A general-purpose coordinate device for a manual defect detector is arranged on a test object and includes at least one inspection sensor, and it is made in the form of a flat frame of an open type, the free ends of which are installed with a possibility of being turned on supporting fasteners fixed on the test object. With that, on the frame there are two encoders arranged, each of which is provided with a cable connected to a cassette holder located between the encoders, in which a cassette is installed and provided with at least one inspection sensor with a possibility of its movement along the test object surface.

EFFECT: improving object test reliability, as well as reducing labour input for use of a coordinate device.

5 dwg

 

The invention relates to a device for non-destructive testing in various fields of engineering and is intended for determining the coordinates of the sensor in the process of finding defects on the local portion of the surface of the testing object, such as housings gearboxes, piping, parts, or subassemblies marine or aviation equipment, etc.

One of the areas of application of the proposed device is its use in measuring devices to check the status of the railway, particularly in the hand-held flaw detectors intended for selective control of defects along the entire cross section of the rail.

The claimed technical solution relates to local non-destructive testing and can be used for inspection of welded joints, frogs, and to Refine data about the defects in the secondary control after flaw detector car or railcar.

A device flaw detector for manual sampling of individual sections of the rail head to detect defects fatigue of origin and assess their real size (http://avionica-ndt.com/prod/a-17.pdf: flaw AVIKON-17, see Annex No. 1).

The known device is mounted on the head rail and provide control and logging only the head of the rail, which prevents the OS�of carrying out control of the entire rail section and greatly reduces its scope.

As a prototype adopted the coordinate device designed to track and monitor the status of the sensor on the plane, made in the form of a mechanical system of two-dimensional coordinate reference type "hand", in the axis of rotation of which is embedded encoders. The device is equipped with two-coordinate positioning system and carries out the movement of the piezoelectric transducer (probe) on the tread surface, on the lateral surfaces of the head and neck of the rail, and also the feather of the sole, which allows scanning with the desired step and remember real-time depth coordinates of the detected defects with the construction of a tomographic image (http://www.votum.ru/ud4_ru/strel/; "Slider M1, see Annex No. 2).

The disadvantage of the prototype is that it is necessary to rearrange and to re-calibrate during control of each plane of the object of control.

For example, when working on the rail, the device should be repositioned to re-calibrate and five times on different planes of rail: the plane of the ski, the side surface of the rail head, the neck rail, feathers soles.

The device of the two-dimensional coordinate reference can work in a prescribed position on the same plane. If the test object contains multiple planes, each plane required per�stop device and a new calibration which leads to inaccuracies coordination, the mismatch of coordinate points in one cross section and increases the complexity and reduces the reliability of operation of the coordinate device.

The task of the claimed technical solution is to increase the reliability of the control object, reduce labor intensity, and the use of pointing devices.

The task is achieved due to the fact that the universal pointing device for handheld flaw detector, placed on the object and containing at least one monitoring sensor, made in the form of a flat frame of the open type, the free ends of which are mounted for rotation on the supporting clamps fixed on the test object, wherein the frame has two rotary encoders, each equipped with a cable connected to the cassette holder disposed between the encoders in which the cassette is placed inside at least one sensor control, with the possibility of moving along the surface of the testing object.

The inventive pointing device for handheld flaw detector is versatile because it can be applied to control both flat and various three-dimensional objects, including curved surfaces, which enhances its range of PR�changes.

The presence of flat open frame type, installed on the test object can be rotated, allows local control of the object, not only on one surface of the object, but on several surfaces surround the object of control, that is, one installation of the support clamps flat on the rotary frame object allows to control all the surface of the test object, for example, of the rail, which increases the positional accuracy of testing results to a specific cross section of the object, increases the reliability objective of document control throughout the cross section of the object, based on the results of measurements on the individual surfaces of the object of control. Flat rotary coordinate frame of the device mounted on the rail in an inclined position, allows to control on the surface of the rail, and the vertical position control on all other surfaces of the rail, namely on the side surfaces of the rail head, neck rail and feathers on the soles.

Due to the fact that the coordinate device for one installation of the support clamps on the rotary frame object provides control over a variety of surfaces of the object and logs the results of monitoring throughout the cross section of the rail without moving it, W�acetelyne reduces the complexity of control object as a whole.

The presence of the swing frame of the two encoders, between which is placed a cassette holder that is associated with the encoder cables, each of which provides a measurement of linear displacement sensor control, allows to determine the position of the sensor on the object of control not only on the plane, but in three-dimensional space, which ensures the extension of the scope of the coordinate device for three-dimensional objects of control and increase the reliability of determination of coordinates, orientation, and size of these defects.

The presence of distinctive features in the claimed technical solution allows to make a conclusion about its compliance with the patentability of "novelty."

The essential features of the claimed invention, determining the receipt of the indicated technical result that is explicitly not follow from the prior art, which allows to make a conclusion about conformity of the invention the condition of patentability "inventive step".

The condition of patentability "industrial applicability" is confirmed on the example of a specific implementation.

The invention is illustrated technical drawings, where

Fig.1 - shown pointing device, mounted on the head rail, with flat frame is installed vertically and the cassette holder is located on the lateral �poverhnosti the rail head;

Fig.2 - flat frame mounted at an angle, wherein the cassette holder is located on the tread surface of the rail head;

Fig.3 is a side view in Fig.2;

Fig.4 - flat frame is installed vertically, while the cassette holder is located at the neck of the rail;

Fig.5 - flat frame is installed vertically, while the cassette holder is located on the feather of the sole.

Universal pointing device for handheld flaw detector is made in the form of a flat frame 1 of the open type, the free ends of which are mounted for rotation on the support 2 clamps fixed on the test object, in this case on the rail 3. On the frame 1 are two of the encoder 4, is provided with a cable 5. Each of encoders 4 is a sensor for measurement of linear displacement sensor using a flexible steel wire rope small diameter of the cord 5. The cables 5 are connected at one point to the cassette holder 6, forming a closed coordinate system. The cassette holder 6 is located between the 4 encoders. In the cassette holder 6 is installed, the cassette 7 placed in her control sensor (not shown), in this case, ultrasonic piezoelectric transducer (pet). The cassette holder 6 is designed for fastening and quick change sensors. For a comprehensive control of the object in the cassette can be� installed sensors for simultaneous implementation, for example, ultrasonic, electromagnetic-acoustic and eddy current control methods. Cassette 7 with the probe mounted on one of surfaces of the object control rail 3 with the possibility of movement on this surface. The coordinate unit is installed, positioned and held on the rail by means of a support clamps 2, made in this case magnetomechanical. Other objects of the control bearing retainers can be made in the form, for example, vacuum clamps.

Pointing device used in conjunction with manual flaw in the various programs non-destructive testing. Handheld flaw detector is equipped with a computer and a GPS receiver (not shown).

The device operates as follows.

To coordinate installation of the device on the testing set flat frame 1, for this purpose, the bearing clamps 2 of the frame 1 is fixed on a selected area of the object 3. The frame 1 is installed in a vertical or inclined position depending on the surface from which they control. Pointing device for handheld flaw detector is intended for registration of results of ultrasonic inspection of the entire cross section of the rail 3: control of the feathers of the base of the rail is performed on the upper surface, a neck and a head rail with lateral surfaces and the surface� Catania. In this case the coordinate positioning device to determine its location in the current time. The cassette 7 with the probe mounted on the surface of the inspection object 3 and manually moved along the surface, carrying out diagnostics of the selected local area. During movement of the cassette holder 6 and the cassette 7 with the probe is changed, the length of each cable 5, which is registered by the encoder 4. Automatically for a given program produces geometric computations, which determine the position of the probe on the test object. Based on these data, calculated the linear displacement of the probe relative to the base coordinates of the alignment, calibration. Thus always tracked the location of the probe, its coordinates.

Coordinate device, equipped with three-axis positioning system, allows scanning of surfaces with the desired step and remember real-time depth coordinates of the detected defects with the construction of tomographic images, which significantly improves the speed control while improving the objectivity and reliability.

Coordinate device records the results of manual inspection of the rail along the entire cross section and with the help of special programs forms of objective testing document. Protocol to�trol automatically includes information about the location and size of defects along the entire cross section of the rail. The device allows you to remember in the on-line depth coordinates of the detected defects. Using manual flaw detect defects such as cracks, incomplete penetration, bubbles, pores, gas shells, non-metallic slag inclusions, etc.

To control other dedicated local section of the flat object of the rotary frame 1 is transferred to this area, and fix it on the object using the reference of the holders 2 in the appropriate position and the cassette 7 with the sensors mounted on another surface of the object.

Thus, the performance of pointing devices in the form of high-precision encoder, provided with ropes and placed on a flat rotary frame, provides three-dimensional positioning, which allows to extend the field of application of the device to use it both flat and a variety of three-dimensional objects of control.

In this case the coordinate device provides control of various surfaces of the object for one to install the supporting fixator frame, allows you to record the results of monitoring throughout the cross section of the rail without moving the device, thereby increasing the accuracy of determining the location and size of defects along the entire cross section of the selected local area of the object of control, and also reduces the complexity ispolzovanpokoleniya device.

Universal pointing device for handheld flaw detector, placed on the object and containing at least one sensor, characterized in that it is made in the form of a flat frame of the open type, the free ends of which are mounted for rotation on the supporting clamps fixed on the test object, wherein the frame has two rotary encoders, each equipped with a cable connected to the cassette holder disposed between the encoders in which the cassette is placed inside at least one sensor monitoring its movement over the surface of the test object.



 

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3 dwg

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