Residual stress measurement system based on ultrasonic waves
By designing a residual stress measurement system based on ultrasonic waves, using ultrasonic stress tester and sensor to transmit and receive ultrasonic signals on the workpiece, the problems of slow welding residual stress detection speed and high cost are solved, and various surfaces are realized. Fast and accurate stress measurement has the advantages of fast test speed, no radiation and light equipment.
Patent Information
- Application Number
- CN202410738992.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2024-12-10
AI Technical Summary
The existing welding residual stress detection methods have problems such as slow detection speed, large radiation, bulky equipment and high cost, especially when measuring various surfaces, lack efficient non-destructive testing methods.
A residual stress measurement system based on ultrasonic waves is designed, including an ultrasonic stress tester, a sensor fixing unit, a body wave sensor and a surface wave sensor. Ultrasonic signals are transmitted and received through an ultrasonic transmitter and receiver, and data is performed using a signal processing unit. Processing, combining data storage and transmission modules, control circuits and calibration self-diagnosis system, achieves rapid and accurate stress measurement of workpieces.
It realizes rapid and accurate stress measurement of various surfaces, with measurement errors ranging from 20-30Mpa, and has the advantages of fast test speed, no radiation, light equipment and low cost, and is suitable for different forms of workpieces.
Smart Images
Figure CN119104190A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of stress measurement equipment technology, and in particular to an ultrasonic-based residual stress measurement system. Background Technology
[0002] Welding is one of the most important connection methods in industrial production, and the quality of welding determines the quality of welded products. Damage to the weld joint caused by excessive residual stress is the most common type of welding failure. Non-destructive testing (NDT) of residual stress in weld joints plays a crucial guiding role in optimizing welding processes in production practice. NDT methods for residual stress mainly include neutron diffraction, synchrotron radiation, magnetic particle testing, X-ray diffraction, and ultrasonic testing. Among these, ultrasonic testing has been the fastest-growing NDT method for residual stress in recent years, offering advantages such as high testing speed, no radiation, lightweight equipment, and low cost. Therefore, it is necessary to propose an ultrasonic measurement system for measuring various surfaces of workpieces. Summary of the Invention
[0003] The purpose of this invention is to provide an ultrasonic-based residual stress measurement system that can quickly and accurately measure the stress on various surfaces.
[0004] To achieve the above objectives, the present invention provides an ultrasonic residual stress measurement system, comprising an ultrasonic stress tester, a sensor fixing unit, a bulk wave sensor, and a surface wave sensor. The ultrasonic stress tester includes an ultrasonic transmitter, an ultrasonic receiver, a signal processing unit, and a display screen. The ultrasonic stress tester is connected to the bulk wave sensor and the surface wave sensor via high-frequency connection cables.
[0005] Preferably, the signal processing unit includes an amplifier, a filter, an analog-to-digital converter, a digital signal processor, a clock and trigger circuit, a control interface, and a temporary memory, with the amplifier, filter, analog-to-digital converter, digital signal processor, and temporary memory connected in sequence.
[0006] Preferably, the ultrasonic stress tester also includes a data storage and transmission module, a control circuit, and a calibration and self-diagnostic system. The data storage and transmission module is used to store the measurement data in the internal memory and transmit the data to external devices for analysis or archiving through the data transmission function. The control circuit is used to provide the power required by the ultrasonic stress tester, the bulk wave sensor, and the surface wave sensor. The calibration and self-diagnostic system is used to periodically self-diagnose the operating status of the ultrasonic stress tester.
[0007] Preferably, both the volume wave sensor and the surface wave sensor have a probe end and a handle end. The volume wave sensor and the surface wave sensor are installed in the sensor fixing unit. The end of the handle end is provided with a connection port for connecting to a high-frequency connection cable.
[0008] Preferably, the ultrasonic stress tester has a material thickness measurement range of 2-200 mm and a stress measurement error of 20-30 MPa.
[0009] Therefore, the present invention employs an ultrasonic residual stress measurement system based on the above structure, which measures workpieces of different shapes by using different waveforms released by a bulk wave sensor and a surface wave sensor, transmits and receives ultrasonic signals through an ultrasonic stress tester, and then processes the received ultrasonic signals to realize stress measurement of the workpiece.
[0010] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of an ultrasonic stress tester according to an embodiment of an ultrasonic residual stress measurement system of the present invention;
[0012] Figure 2 This is a schematic diagram of the signal processing unit structure according to an embodiment of the present invention. Detailed Implementation
[0013] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.
[0014] Example
[0015] like Figure 1 As shown, an ultrasonic residual stress measurement system includes an ultrasonic stress tester, a sensor fixing unit, a bulk wave sensor, and a surface wave sensor. The ultrasonic stress tester includes an ultrasonic transmitter, an ultrasonic receiver, a signal processing unit, and a display screen. The ultrasonic stress tester is connected to the bulk wave sensor and the surface wave sensor respectively via high-frequency connection cables.
[0016] The ultrasonic stress tester also includes a data storage and transmission module, a control circuit, and a calibration and self-diagnostic system. The data storage and transmission module is used to store the measurement data in the internal memory and transmit the data to external devices for analysis or archiving through the data transmission function. The control circuit is used to provide the power required by the ultrasonic stress tester, the bulk wave sensor, and the surface wave sensor. The calibration and self-diagnostic system is used to periodically self-diagnose the operating status of the ultrasonic stress tester.
[0017] like Figure 2 As shown, the signal processing unit includes an amplifier, a filter, an analog-to-digital converter, a digital signal processor, a clock and trigger circuit, a control interface, and a temporary memory. The amplifier, filter, analog-to-digital converter, digital signal processor, and temporary memory are connected in sequence.
[0018] Amplifier: The signal received by the ultrasound receiver may be very weak, so it needs to be amplified first to increase the amplitude of the signal.
[0019] Filters: Ultrasonic signals may be affected by various interferences, such as environmental noise and stray signals. Filters are used to remove these interferences to ensure the clarity and accuracy of the signal.
[0020] Analog-to-digital converter (ADC): The signals received and processed by an ultrasound receiver are typically analog signals, while many subsequent processing steps require digital signals. Therefore, an ADC converts the analog signals into digital signals for digital signal processing.
[0021] Digital signal processors (DSPs) are used to perform various processing and analysis on digital signals, such as filtering, time-domain analysis, and frequency-domain analysis.
[0022] Clock and trigger circuits: used to synchronize the operation of the signal processing unit, ensuring that signal processing is performed at the appropriate time and ensuring the accuracy and repeatability of measurements.
[0023] Control interface: Used for control and configuration, allowing users to set measurement parameters, select processing algorithms, etc.
[0024] Temporary storage: Used for temporarily storing processed data or configuration files.
[0025] Both bulk wave and surface wave sensors have a probe end and a handle end. The probe end is surrounded by a vacuum suction cup, and the handle end has a connection port for connecting to a high-frequency cable. For different workpieces, bulk wave and surface wave sensors can be mounted on different sensor mounting units, including cylindrical holders for pins and bolts, clamp holders for thin plates, and vacuum pressure holders for general surfaces, ensuring a secure fixation between the sensors and the workpiece. A coupling agent should be applied between the bulk wave sensor / surface wave sensor and the workpiece.
[0026] The ultrasonic stress tester has a material thickness measurement range of 2-200 mm and a stress measurement error of 20-30 MPa.
[0027] Therefore, the present invention employs an ultrasonic residual stress measurement system based on the above structure, which measures workpieces of different shapes by using different waveforms released by a bulk wave sensor and a surface wave sensor, transmits and receives ultrasonic signals through an ultrasonic stress tester, and then processes the received ultrasonic signals to realize stress measurement of the workpiece.
[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.
Claims
1. An ultrasonic residual stress measurement system, characterized in that: Ultrasonic stress tester, sensor fixing unit, body wave sensor, surface wave sensor, the ultrasonic stress tester includes ultrasonic transmitter, ultrasonic receiver, signal processing unit, display screen, ultrasonic stress tester is connected with body wave sensor and surface wave sensor respectively through high frequency connecting cable.
2. The ultrasonic residual stress measurement system according to claim 1, characterized in that: The signal processing unit comprises an amplifier, a filter, an analog-to-digital converter, a digital signal processor, a clock and trigger circuit, a control interface, and a temporary memory. The amplifier, the filter, the analog-to-digital converter, the digital signal processor and the temporary memory are connected in sequence.
3. The ultrasonic residual stress measurement system according to claim 2, characterized in that: The ultrasonic stress tester also includes a data storage and transmission module, a control circuit, a calibration and self-diagnosis system. The data storage and transmission module is used to store the measured data in the internal memory, and transmit the data to the external device for analysis or archiving through the data transmission function; the control circuit is used to provide the power required by the ultrasonic stress tester and the body wave sensor and surface wave sensor; the calibration and self-diagnosis system is used to regularly self-diagnose the operating status of the ultrasonic stress tester.
4. The ultrasonic residual stress measurement system according to claim 1, characterized in that: The bulk wave sensor and the surface wave sensor both have a probe end and a handle end. The bulk wave sensor and the surface wave sensor are installed in a sensor fixing unit. A connection port is provided at the end of the handle end for connecting with a high-frequency connection cable.
5. The ultrasonic residual stress measurement system according to claim 1, characterized in that: The material thickness measurement range of the ultrasonic stress tester is 2-200mm, and the stress measurement error is 20-30Mpa.