An ultrasonic thickness gauge calibration device

Abstract

This utility model discloses an ultrasonic thickness gauge calibration device, including a housing, a test block mounting base for fixing a standard test block inside the housing, a probe clamp for fixing the ultrasonic thickness gauge probe above the test block mounting base via a drive mechanism, and a camera for acquiring information displayed by the ultrasonic thickness gauge via a camera bracket on the side of the test block mounting base; a control box for controlling the calibration of the ultrasonic thickness gauge is located inside the housing, the control box contains a controller, the output of the camera is connected to the input of the controller, and the output of the controller is connected to the input of the drive mechanism. This utility model achieves replaceability and protection of the standard test block through modular design, and realizes automated calibration guarantee, improving calibration accuracy. The test block mounting base allows for convenient and quick replacement of the standard test block, meeting the needs of batch calibration of ultrasonic thickness gauges.

Description

Technical Field

[0001] This utility model relates to the field of industrial non-destructive testing technology, and more specifically to an ultrasonic thickness gauge calibration device. Background Technology

[0002] An ultrasonic thickness gauge works by emitting a very short ultrasonic pulse into the surface of the object being measured through a probe. This pulse enters the interior of the material being measured and propagates at a speed specific to that material along a direction perpendicular to the surface. When the ultrasonic pulse reaches the interface between the material and the air, due to the significant difference in acoustic impedance, most of the energy is reflected back, forming an echo. The probe receives the ultrasonic pulse reflected back from the bottom surface. The instrument's internal precision electronic circuitry accurately measures the time elapsed from the moment the ultrasonic pulse is emitted to the moment the echo is received from the bottom surface. This time is called the transit time, which represents the time required for the ultrasonic wave to travel back and forth once within the material.

[0003] To ensure measurement accuracy, the thickness gauge needs to be calibrated regularly using standard test blocks. Existing calibration devices use fixed standard test blocks, which are prone to surface wear after long-term contact with the probe, causing deviations in the calibration reference and affecting the calibration accuracy. Furthermore, traditional calibration devices require frequent replacement of test blocks of different thicknesses and probe positions during use, making the operation process cumbersome and difficult to meet the needs of batch calibration. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an ultrasonic thickness gauge calibration device, which realizes the replacement and protection of standard test blocks through modular design, and realizes automated calibration operation, thereby improving calibration accuracy and efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] An ultrasonic thickness gauge calibration device includes a housing, within which is a test block mounting base for fixing a standard test block. Above the test block mounting base, via a drive mechanism, is a probe clamp for fixing an ultrasonic thickness gauge probe. Next to the test block mounting base, via a camera bracket, is a camera for acquiring information displayed by the ultrasonic thickness gauge. Inside the housing is a control box for controlling the calibration of the ultrasonic thickness gauge. The control box contains a controller. The camera's output is connected to the controller's input, and the controller's output is connected to the drive mechanism's input.

[0007] To further optimize the technical solution, the top of the test block mounting base is provided with several mounting slots of different depths for placing standard test blocks. The bottom of the mounting slot is provided with a pressure sensor for detecting whether the standard test block is installed in place. The output end of the pressure sensor is connected to the output end of the controller.

[0008] To further optimize the technical solution, the driving mechanism includes several vertically mounted supports inside the housing. A crossbeam is mounted on each support, and connecting plates are mounted on both sides of the crossbeam. A lead screw is mounted between the two connecting plates, and a slider that moves left and right along the lead screw is mounted on the lead screw. A lifting cylinder is mounted on the slider, and a probe clamp is mounted at the end of the extension rod of the lifting cylinder. A motor for driving the lead screw to rotate is mounted at the end of the crossbeam, and the input ends of the lifting cylinder and the motor are respectively connected to the output end of the controller.

[0009] To further optimize the technical solution, the rear end of the slider is wrapped around the crossbeam.

[0010] To further optimize the technical solution, a lifting block is provided at the end of the cylinder telescopic rod, and the probe clamping seat is mounted on the lifting block through a clamping seat frame.

[0011] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0012] This utility model provides an ultrasonic thickness gauge calibration device that achieves replaceability and protection of standard test blocks through modular design, and realizes automated calibration guarantee, thereby improving calibration accuracy. The test block mounting base allows for convenient and quick replacement of standard test blocks, meeting the needs of batch calibration of ultrasonic thickness gauges. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a partial structural schematic diagram of the present invention;

[0015] Figure 3 This is an exploded view of the present invention.

[0016] The components are: 1. Outer shell, 2. Test block mounting base, 3. Probe clamping base, 4. Camera bracket, 5. Camera, 6. Ultrasonic thickness gauge, 7. Control box, 8. Bracket, 9. Crossbeam, 10. Lead screw, 11. Slider, 12. Lifting cylinder, 13. Lifting block, 14. Clamping base, 15. Motor, 16. Standard test block. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] An ultrasonic thickness gauge calibration device, combined with Figures 1 to 3As shown, the device includes a housing 1, inside which is a test block mounting base 2. Above the test block mounting base 2 is a probe clamping base 3 for fixing the probe of the ultrasonic thickness gauge 6. A camera 5 is located beside the test block mounting base 2 for acquiring the information displayed by the ultrasonic thickness gauge 6. Inside the housing 1 is a control box 7 containing a controller for calibrating the ultrasonic thickness gauge. The output of the camera is connected to the input of the controller.

[0019] The top of the test block mounting base 2 has several mounting slots of different depths. Standard test blocks 16 are placed in the mounting slots. The thickness range of the standard test blocks covers the range of the thickness gauge: 2.0, 3.3, 5.5, 10.0, 15.0, 20.0, 25.0, 50.0, 75.0, 100.0, 150.0, and 200.0, providing a calibration reference for the ultrasonic thickness gauge.

[0020] A pressure sensor is installed at the bottom of the mounting slot to detect the contact pressure required to ensure the standard test block 16 is properly installed. The output of the pressure sensor is connected to the input of the controller. During the standard test block positioning process, to ensure reliable fixation between the standard test block and the positioning mechanism and to avoid measurement errors due to insecure fixation, the pressure sensor at the bottom detects the pressure of the standard test block. It is installed on the surface of the positioning plate that contacts the test block. When the test block is fixed, the sensor monitors the pressure on the test block, thereby ensuring the accuracy of the calibration measurement.

[0021] The probe holder 3 is positioned above the test block mounting base 2 via a drive mechanism. The drive mechanism includes several vertically mounted supports 8 within the outer casing 1. A crossbeam 9 is mounted on each support 8, with connecting plates at both ends. A lead screw 10 is positioned between the two connecting plates, and a slider 11 is fitted onto the lead screw 10. A lifting cylinder 12 is mounted on the slider 11, and a lifting block 13 is located at the end of the lifting cylinder's telescopic rod. The probe holder 3 is mounted on the lifting block 13 via a holder frame 14. The rear end of the slider 11 is encased in the crossbeam 9, and a motor 15 is located at the end of the crossbeam 9. The motor shaft is connected to the lead screw to drive its rotation. The input ends of the lifting cylinder and the motor are connected to the input ends of a controller. The motor drives the lead screw to rotate, causing the slider to move left and right on the crossbeam. Since the slider is encased in the crossbeam, the crossbeam guides the slider's movement, achieving smooth movement of the slider on the crossbeam.

[0022] When calibrating the ultrasonic thickness gauge, the ultrasonic thickness gauge is placed below the camera inside the housing. The camera 5 is set inside the housing 1 through the camera bracket 4. The camera is aimed at the display screen of the thickness gauge and captures the numerical display screen of the ultrasonic thickness gauge in real time. The captured image information is transmitted to the controller. The controller compares the collected numerical information with the standard value of the corresponding standard test block and generates calibration parameters to realize the calibration operation of the ultrasonic thickness gauge.

Claims

1. An ultrasonic thickness gauge calibration device, characterized in that: The device includes an outer shell (1), inside which is a test block mounting base (2) for fixing a standard test block (16), above which is a probe holder (3) for fixing the probe of an ultrasonic thickness gauge (6) via a drive mechanism, and on the side of the test block mounting base (2) via a camera bracket (4) for collecting information displayed by the ultrasonic thickness gauge (6); inside the outer shell (1) is a control box (7) for controlling the calibration of the ultrasonic thickness gauge, inside which is a controller, the output end of the camera is connected to the input end of the controller, and the output end of the controller is connected to the input end of the drive mechanism.

2. The ultrasonic thickness gauge calibration device according to claim 1, characterized in that: The top of the test block mounting base (2) is provided with several mounting slots of different depths for placing standard test blocks (16). The bottom of the mounting slot is provided with a pressure sensor for detecting whether the standard test block (16) is installed in place. The output end of the pressure sensor is connected to the output end of the controller.

3. The ultrasonic thickness gauge calibration device according to claim 1, characterized in that: The drive mechanism includes several supports (8) vertically arranged inside the outer casing (1). A crossbeam (9) is provided on the support (8). Connecting plates are provided on both sides of the crossbeam (9). A lead screw (10) is provided between the two connecting plates. A slider (11) that moves left and right along the lead screw is sleeved on the lead screw (10). A lifting cylinder (12) is provided on the slider (11). A probe holder (3) is provided at the end of the extension rod of the lifting cylinder. A motor (15) for driving the lead screw to rotate is provided at the end of the crossbeam (9). The input ends of the lifting cylinder and the motor are respectively connected to the output end of the controller.

4. The ultrasonic thickness gauge calibration device according to claim 3, characterized in that: The rear end of the slider (11) is attached to the crossbeam (9).

5. The ultrasonic thickness gauge calibration device according to claim 3, characterized in that: The end of the cylinder telescopic rod is provided with a lifting block (13), and the probe clamping seat (3) is set on the lifting block (13) through the clamping seat frame (14).

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