A probe calibration device and deviation measurement method for an ultrasonic water spray detection system

Abstract

This invention belongs to the technical field of ultrasonic water spray testing systems, and particularly relates to a probe calibration device and deviation measurement method for an ultrasonic water spray testing system. The device includes: a main body, a base, a first locking screw, and a second locking screw; the main body is a circular ring with a break point and two lugs at the break point, the second locking screw connecting the two lugs; a radial threaded hole is provided on the side opposite the break point of the main body; the base is a cuboid with a threaded through hole in the middle, the first locking screw passing through the threaded through hole and the radial threaded hole sequentially to connect the base to the main body; a first groove and a second groove are respectively provided on both sides of the threaded through hole on the end face of the base away from the main body; the two grooves are used to fix the target ball.

Description

Technical Field

[0001] This invention belongs to the technical field of ultrasonic water spray testing systems, and particularly relates to a probe calibration device and deviation measurement method for ultrasonic water spray testing systems. Background Technology

[0002] Ultrasonic water jet testing systems are essential equipment for non-destructive testing of parts, undertaking a large volume of non-destructive testing work. To ensure the accuracy of the ultrasonic water jet testing system, a self-developed calibration method was used to calibrate the ultrasonic water jet testing system probe. The calibration process involved using a laser tracker, a target holder, and a target ball. However, during probe calibration, the target holder needed to be placed in a suitable position on the probe to attract the target ball. Since the probe was made of plastic, the target holder could only adhere to steel surfaces. Therefore, the laser tracker's target holder could not be fixed to the probe. Glue or a glue gun was then used to fix the target holder to the probe. Furthermore, the irregular shape of the probe made it difficult to find a suitable position for the target holder. When changing the angle of the probe for measurement, the target holder needed to be removed from the probe and reinstalled, resulting in very low testing efficiency. Summary of the Invention

[0003] The purpose of this invention is to better calibrate the mechanical parts of an ultrasonic water jet testing system, ensuring its accuracy requirements during operation, accurate positioning during ultrasonic testing, and ensuring accuracy in use. Addressing the shortcomings and deficiencies of the technology, this invention provides a probe calibration device and deviation measurement method for an ultrasonic water jet testing system. The device can be installed on the probe of the ultrasonic water jet testing system, directly adsorbing the target ball onto the measuring device. A laser tracker is then used to provide a rapid method for measuring the deviation of the ultrasonic water jet testing system probe.

[0004] Technical solution:

[0005] An ultrasonic water jet detection system probe calibration device includes: a main body, a base, a first locking screw, and a second locking screw;

[0006] The main body is a circular hoop, and the main body has a break point with two ears at the break point. The second locking screw connects the two ears.

[0007] A radial threaded hole is provided on one side opposite to the main body break point;

[0008] The base is a cuboid with a threaded through hole in the middle. The first locking screw passes through the threaded through hole and the radial threaded hole in sequence to connect the base to the main body.

[0009] The base has a first groove and a second groove on either side of the threaded through hole on the side away from the main body; the two grooves are used to fix the target ball.

[0010] Furthermore, magnetic material is embedded in the first and second grooves of the base to attract the target ball.

[0011] A method for measuring probe deviation in an ultrasonic water jet detection system, the method being implemented using the aforementioned device, and comprising the following steps:

[0012] Step 1: Install the calibration device on the probe of the ultrasonic water jet detection system;

[0013] Step 2: Operate the ultrasonic water spray detection system to return to zero position and record the zero point;

[0014] Step 3: Turn on the laser tracker and connect it to the target sphere; set the probe step size P1 of the ultrasonic water spray detection system.

[0015] Step 4: Install the target ball of the laser tracker in the first groove; measure the position of the target ball and record it as Point1; then place the target ball in the second groove, measure the position of the target ball again and record it as Point2; and establish a straight line L1 using Point1 and Point2 through the laser tracker.

[0016] Step 5: Control the ultrasonic water spray detection system probe to move P1 to the next position; similar to step 4, obtain Point3, Point4 and line L2;

[0017] Step 6: Calculate the angle between lines L1 and L2, and use it as the measured angle value Q1;

[0018] Step 7: Control the ultrasonic water spray detection system probe to continue moving. Each time P1 is moved, Q2 and Q3 are obtained in sequence.

[0019] Step 8: Calculate the deviation values ​​X1, X2, and X3 based on the measured angle values ​​Q1, Q2, and Q3 and the step distance P1;

[0020] Step 9: Take the maximum value among the deviation values ​​as the probe deviation of the ultrasonic water jet detection system.

[0021] Furthermore, the ultrasonic water spray detection system probe has two rotational degrees of freedom, namely rotation axis A and rotation axis B;

[0022] The A-axis rotation is the rotation of the ultrasonic water spray detection system probe around a straight line perpendicular to the paper surface, rotating clockwise or counterclockwise within the paper surface.

[0023] The B-axis rotation is the rotation of the ultrasonic water spray detection system probe around a vertical straight line in the horizontal plane.

[0024] Furthermore, in the method for measuring the probe deviation of the ultrasonic water jet detection system, the deviation of the A rotating axis and the deviation of the B rotating axis are measured separately.

[0025] Furthermore, in step one, when measuring the deviation of the A rotation axis, the main body is first fixed to the probe by the second locking screw, and then the base is rotated so that the length direction of the base is parallel to the plane where the main body is located.

[0026] When measuring the deviation of the B rotation axis, first fix the main body to the probe with the second locking screw, and then rotate the base so that the length direction of the base is perpendicular to the plane where the main body is located.

[0027] Furthermore, in steps five and seven, when measuring the deviation of rotation axis A, the probe is controlled to rotate only along the direction of rotation axis A;

[0028] When measuring the deviation of the B rotation axis, the control probe rotates only in the direction of the B rotation axis.

[0029] Furthermore, step nine also includes: when measuring the deviation of rotation axis A and rotation axis B, different step distances are set for each, and steps four to eight are repeated for different step distances to measure the deviation under different step distances.

[0030] Furthermore, step nine also includes: when measuring the deviation between rotation axis A and rotation axis B, multiple measurements are performed at different positions under different step sizes, and the maximum value among the multiple measurements at different positions under different step sizes is taken as the deviation of the corresponding rotation axis.

[0031] Furthermore, the step size is 5°, 10°, 15°, 20°, 25°, 30°, or 45°.

[0032] The advantages of this invention are:

[0033] The purpose of this invention is to address the issue that when calibrating an ultrasonic water jet testing system probe, a target holder needs to be fixed to the probe. The target holder can be attached to a steel surface, and then a target ball is attached to the target holder for calibration using a laser tracker. However, since the probe is made of plastic, it's impossible to fix the target holder to it. Therefore, glue or a glue gun is used to fix the target holder to the probe, but due to the irregular shape of the probe, fixing the target holder is difficult, and the target holder needs to be removed from the probe when changing the angle for measurement, resulting in very low testing efficiency. This invention provides a calibration device for measuring ultrasonic water jet testing system probes. The target ball can be directly fixed to the ultrasonic water jet testing system probe and then calibrated using a laser tracker. Only the ultrasonic water jet testing system program needs to move at the corresponding step distance, eliminating the need for a target holder. Only a target ball is needed for probe calibration, improving the testing efficiency of the ultrasonic water jet testing system probe. This calibration device has a simple structure, is easy to operate, has good stability, and a long service life.

[0034] This invention enables better calibration of the mechanical parts of the ultrasonic water jet testing system. In order to ensure its accuracy requirements during operation, accurate positioning during ultrasonic testing, and accuracy during use, a self-developed measurement method is used to calibrate the ultrasonic water jet testing system probe. Attached Figure Description

[0035] Figure 1 This is a schematic diagram showing the rotation direction of the rotating axis of probe A in an ultrasonic water spray detection system.

[0036] Figure 2 This is a schematic diagram showing the rotation direction of the probe B rotating axis in an ultrasonic water spray detection system.

[0037] Figure 3 This is a schematic diagram of a probe calibration device for an ultrasonic water jet detection system.

[0038] Figure 4 This is a schematic diagram of the measurement of the rotation axis deviation of probe A in an ultrasonic water spray detection system.

[0039] Figure 5 This is a schematic diagram of the measurement of the rotation axis deviation of probe B in an ultrasonic water spray detection system.

[0040] The annotations in the attached figures are explained as follows:

[0041] Main body 1, base 2, locking screw 3, locking screw 4. Groove 2-1, groove 2-2. Detailed Implementation

[0042] An ultrasonic water jet detection system probe calibration device, such as Figure 3As shown, the device includes a main body 1, a base 2, and a locking screw 3. The base has grooves 2-1 and 2-2. The main body 1 can be clamped onto the probe, and the locking screw 2 secures the main body to the probe. The base has two grooves 2-1 and 2-2 for adsorbing the target ball. Magnets are embedded in the two grooves to attract the target ball.

[0043] A method for measuring probe deviation in an ultrasonic water jet testing system involves selecting appropriate positions for the laser tracker and target sphere based on the system's structure, and setting the measurement program and corresponding parameters. The appropriate program is executed on the ultrasonic water jet testing system, causing the moving parts to travel along the coordinate axes to a series of target positions, pausing for several seconds at each position (generally more than 2 seconds longer than the calibrating instrument's pause time) to ensure accurate measurement and data recording. After the control and measurement programs of the ultrasonic water jet testing system are confirmed, the system is run for several minutes. Then, the probe is moved to the starting position, the measuring instrument is zeroed, the measurement program is started, and the ultrasonic water jet testing system program is initiated. The ultrasonic water jet testing system should move between target positions in the same step distance according to the program, in both directions of the A and B rotation axes. The rotation direction of axis A is as follows... Figure 1 The direction of rotation of axis B is as follows Figure 2 The measuring instrument will record the actual values ​​of each step distance of the A and B rotating axes respectively. After calibration, the measurement data should be saved first, and the evaluation standard should be selected before outputting the measurement results.

[0044] Finally, here's how to operate and calculate the deviation value of the ultrasonic water jet testing system probe: First, return the ultrasonic water jet testing system probe to its zero position. The laser tracker records this point as the zero point. Input the specified step distance into the ultrasonic water jet testing system. At different target positions, have the laser tracker read the data at this time. The laser tracker measures the angle value. Q i Measure angle value Q i Compared with actual angle value P i The difference is the angle deviation of the probe. X i Calculate the deviations sequentially, using the formula described above. X i = Q i - P i Calculate and record the calibration results. Calibrate at four target positions: 0°, 15°, 30°, and 45°, on both axes A and B.

[0045] Example 1:

[0046] When measuring the deviation of the rotation axis A, install the main body 1 on the ultrasonic water jet detection system probe, tighten the locking screw 4 to fix the main body 1 on the probe, then loosen the locking screw 3, rotate the base 2 to make the base 2 parallel to the main body 1, tighten the locking screw 3, install the laser tracker target ball on the base groove 2-1, and operate the ultrasonic water jet detection system to return the rotation axis A to the zero position. Figure 4 Record this point as the zero point. Open the laser tracker software. After successful laser connection, take a point (Point1) at the location of the target ball. Then place the target ball on groove 2-2, click "Measure," and take a point (Point2). Use the laser tracker software to establish a straight line. L 1. First, measure the step distance of the probe movement P1 = 15°. Operate the ultrasonic water spray detection system to move its probe 15°, then place the target ball on groove 2-1 at this position, click to measure, and take a point at Point3. Then place the target ball on groove 2-2, click to measure, and take a point at Point4. Use the laser tracker software to establish a straight line. L 2. Evaluation using laser tracker software L 1. L 2. The angle Q1 between the two straight lines is rotated sequentially to the three positions of the corresponding distance measurement, according to... Figure 1 Moving in the direction of the arrow, the laser tracker reads data at different target locations, and the laser tracker sequentially measures the angle values. Q 2, Q 3. Measure the angle value Q 1. Actual step distance P The difference of 1 represents the angular deviation of the probe. X 1. Calculate the deviation value sequentially, according to the formula. X 1= Q 1- P 1, X 2= Q 2- P 1, X 3= Q 3- P 1. Calculate and record the deviation value. Measure the deviation value when the step distance is P2 = 30° and P3 = 45° using the same method. Measure 5 times at each position and record the maximum deviation value as the deviation value in the A-axis rotation direction of the ultrasonic water jet detection system probe.

[0047] Example 2:

[0048] When measuring the deviation of the B rotation axis direction, install the main body 1 on the ultrasonic water jet detection system probe, tighten the locking screw 4 to fix the main body 1 on the probe, then loosen the locking screw 3, rotate the base 2 to keep the base 2 parallel to the main body 1, tighten the locking screw 3, install the laser tracker target ball on the base groove 2-1, and operate the ultrasonic water jet detection system to return the B rotation axis to the zero position. Figure 5 Record this point as the zero point. Open the laser tracker software. After successful laser connection, take a point (Point1) at the location of the target sphere. Then place the target sphere on groove 2-2, click "Measure," and take a point (Point2). Use the laser tracker software to establish a straight line. L 1. First, measure the step distance of the probe movement P1 = 15°. Operate the ultrasonic water spray detection system to move the probe by 15°. Then, place the target ball on groove 2-1 at this position, click to measure, and take a point (Point3). Next, place the target ball on groove 2-2, click to measure, and take a point (Point4). Use the laser tracker software to establish a straight line. L 2. Evaluation using laser tracker software L 1. L 2. The angle Q1 between the two straight lines is measured by rotating the laser tracker to five different positions in sequence. At each different target position, the laser tracker reads the data and measures the angle value sequentially. Q 2, Q 3. Measure the angle value Q 1. Actual step distance P The difference of 1 represents the head angle deviation. X 1. Calculate the deviation value sequentially, according to the formula. X 1= Q 1- P 1, X 2= Q 2- P 1, X 3= Q 3- P 1. Calculate and record the deviation value. Measure the deviation value when the step distance is P2 = 30° and P3 = 45° using the same method. Measure 5 times at each position and record the maximum deviation value as the deviation value in the B-axis rotation direction of the ultrasonic water jet detection system probe.

Claims

1. A method for measuring probe deviation in an ultrasonic water jet testing system, wherein the method is implemented using an ultrasonic water jet testing system probe calibration device, characterized in that: The device includes: a main body, a base, a first locking screw, and a second locking screw; The main body is a circular hoop with a break point and two lugs at the break point. The second locking screw connects the two lugs. A radial threaded hole is provided on the side opposite the break point of the main body. The base is a cuboid with a threaded through hole in the middle. The first locking screw passes through the threaded through hole and the radial threaded hole in sequence to connect the base to the main body. A first groove and a second groove are respectively provided on both sides of the threaded through hole on the end face of the base away from the main body. The two grooves are used to fix the target ball. The method includes the following steps: Step 1: Install the calibration device on the probe of the ultrasonic water jet detection system; Step 2: Operate the ultrasonic water spray detection system to return to zero position and record the zero point; Step 3: Turn on the laser tracker and connect it to the target sphere; set the probe step size P1 of the ultrasonic water spray detection system. Step 4: Install the target ball of the laser tracker in the first groove; measure the position of the target ball and record it as Point1; then place the target ball in the second groove, measure the position of the target ball again and record it as Point2; and establish a straight line L1 using Point1 and Point2 through the laser tracker. Step 5: Control the ultrasonic water spray detection system probe to move P1 to the next position; similar to step 4, obtain Point3, Point4 and line L2; Step 6: Calculate the angle between lines L1 and L2, and use it as the measured angle value Q1; Step 7: Control the ultrasonic water spray detection system probe to continue moving. Each time P1 is moved, Q2 and Q3 are obtained in sequence. Step 8: Calculate the deviation values ​​X1, X2, and X3 based on the measured angle values ​​Q1, Q2, and Q3 and the step distance P1; Step 9: Take the maximum value among the deviation values ​​as the probe deviation of the ultrasonic water jet detection system.

2. The method according to claim 1, characterized in that: The first and second grooves of the base are inlaid with magnetic material to attract the target ball.

3. The method according to claim 2, characterized in that: The ultrasonic water spray detection system probe has two rotational degrees of freedom, namely rotation axis A and rotation axis B. The A-axis rotation is the rotation of the ultrasonic water spray detection system probe around a straight line perpendicular to the paper surface, rotating clockwise or counterclockwise within the paper surface. The B-axis rotation is the rotation of the ultrasonic water spray detection system probe around a vertical straight line in the horizontal plane.

4. The method according to claim 3, characterized in that: In the method described above, when measuring the probe deviation of an ultrasonic water jet detection system, the deviation of the A rotating axis and the deviation of the B rotating axis are measured separately.

5. The method according to claim 4, characterized in that: In step one, when measuring the deviation of the A rotation axis, the main body is first fixed to the probe by the second locking screw, and then the base is rotated so that the length direction of the base is parallel to the plane where the main body is located. When measuring the deviation of the B rotation axis, first fix the main body to the probe with the second locking screw, and then rotate the base so that the length direction of the base is perpendicular to the plane where the main body is located.

6. The method according to claim 5, characterized in that: In steps five and seven, when measuring the deviation of rotation axis A, the probe is controlled to rotate only along the direction of rotation axis A. When measuring the deviation of the B rotation axis, the control probe rotates only in the direction of the B rotation axis.

7. The method according to claim 6, characterized in that: Step nine further includes: when measuring the deviation of rotation axis A and rotation axis B, different step distances are set for each, and steps four to eight are repeated for different step distances to measure the deviation under different step distances.

8. The method according to claim 7, characterized in that: Step nine further includes: when measuring the deviation between rotation axis A and rotation axis B, multiple measurements are performed at different positions under different step distances, and the maximum value among the multiple measurements at different positions under different step distances is taken as the deviation of the corresponding rotation axis.

9. The method according to claim 7, characterized in that: The step size is 5°, 10°, 15°, 20°, 25°, 30°, or 45°.

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