Detection device for calibrating ultrasonic phased array probe

Abstract

The invention provides a detection device for calibrating an ultrasonic phased array probe, which is characterized in that a standard sample block is arranged in front of the calibrated ultrasonic phased array probe, the calibrated ultrasonic phased array probe is connected with a channel adapter through a wire connector, the channel adapter is connected with a signal generator through the channel adapter wire connector, and the signal generator is connected with the standard sample block. The signal generator is connected with the oscilloscope through a signal generator connecting line, and the main control computer is respectively connected with the channel adapter, the signal generator and the main control computer through data communication lines. In ultrasonic detection, the phased array ultrasonic probe is characterized in that a piezoelectric wafer for energy conversion is not a whole body any more, but a surface array probe consisting of a plurality of piezoelectric wafer units, and finally, complex detection functions such as ultrasonic focusing and sector scanning are realized under the control of a programmable logic gate array. The method has the advantages that full-automatic switching calibration is achieved, time and labor cost are saved, data processing application software is more accurate and convenient, and it is ensured that the performance reaches the specified standard.

Description

Technical Field

[0001] The present invention relates to the technical field of metrology and detection, and in particular to a detection device for calibrating an ultrasonic phased array probe. Background Art

[0002] The detection device for calibrating ultrasonic phased array probes is a device used to detect and calibrate the performance of ultrasonic phased array probes. The basic function of this device is to measure the frequency, bandwidth, duration, probe sensitivity, crosstalk and other parameters of ultrasonic waves during transmission by transmitting and receiving ultrasonic waves. Because the frequency characteristics of the probe and the quality of the transmitting voltage directly affect whether the ultrasonic waves can be transmitted normally, and the quality of the ultrasonic waves determines the quality of the detection of the defect location and defect size of the parts, the performance of the ultrasonic phased array probe needs to be evaluated regularly.

[0003] Currently, the industry is unable to achieve multi-channel automatic switching calibration of phased array probes. Manual calibration of 64 channels has many uncertainties, is time-consuming and labor-intensive, and cannot guarantee its accuracy. Summary of the invention

[0004] The purpose of the present invention is to realize automatic calibration of all channels of an ultrasonic phased array probe by using a detection device of the ultrasonic phased array probe, thereby ensuring that its performance reaches the specified standard, thereby improving its accuracy and reliability in practical applications.

[0005] The present invention provides a detection device for calibrating an ultrasonic phased array probe, which is characterized by comprising a signal generator, a standard sample block, a channel adapter, a main control computer, and an ultrasonic phased array probe to be calibrated;

[0006] The standard sample block is arranged in front of the ultrasonic phased array probe to be calibrated, the ultrasonic phased array probe to be calibrated is connected to the channel adapter through a connector, the channel adapter is connected to the signal generator through a channel converter connector, the signal generator is connected to the oscilloscope through a signal generator connecting line, and the main control computer is respectively connected to the channel adapter, the signal generator and the main control computer through a data communication line.

[0007] The signal generator is used to stimulate the corresponding phased array ultrasonic probe chip and emit ultrasonic signals; the standard sample block is used to reflect ultrasonic signals; the channel adapter is used to forward the signal of the corresponding channel of the phased array probe; the main control computer is used to control the signal generator, the oscilloscope and the channel adapter to work together, and to perform digital signal processing on the collected signals and display the calibrated results; the calibrated ultrasonic phased array probe is used as the calibration object; the data communication line is used to connect the main control computer with the channel adapter, the signal generator and the oscilloscope, and perform corresponding control.

[0008] The main control computer is an industrial computer, the data communication line connected to the signal generator is a serial port extension line; the data communication line connected to the channel converter is a USB printer connection line with a B-type port; the data communication line connected to the oscilloscope is a USB printer connection line with a B-type port.

[0009] The channel converter is a radio frequency channel switch; the signal generator is DPR-300; the oscilloscope is DS1000Z-E; and the channel converter connector is a radio frequency line.

[0010] The ultrasonic phased array probe connector to be calibrated is a radio frequency line; the signal generator connection line is a universal BNC connection line; and the ultrasonic phased array probe to be calibrated is the object to be calibrated.

[0011] The standard sample block is an ultrasonic sample block.

[0012] In ultrasonic testing, the characteristic of phased array ultrasonic probes is that the piezoelectric chip for energy conversion is no longer a whole, but a surface array probe composed of multiple piezoelectric chip units. Ultimately, under the control of a programmable logic gate array, complex detection functions such as ultrasonic focusing and fan scanning are realized.

[0013] Study the 64-channel metrological characteristics of the phased array ultrasonic probe for transmitting and receiving signals, and test whether each channel is effectively connected to an array element of the probe. The interfaces of the phased array probe are mostly dense special interfaces, and the adapters must be studied and made to import the signals. The standard bus sockets for connecting the standard instrument bus and the probe must be designed and made, and the automatic calibration device and programming must be built to achieve multi-channel automatic switching calibration.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] At present, the calibration of phased array ultrasonic probes generally uses test leads to manually switch and calibrate the 64 channels one by one. The measurement points are dense and numerous, the measurement uncertainty caused by human factors is large, the accuracy of the calibration data is difficult to guarantee, and it is time-consuming and labor-intensive. The use of this device can automatically switch and calibrate, eliminate human interference factors throughout the process, save time and labor costs, and make the data processing application software more accurate and convenient, ensuring that its performance meets the specified standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 A simplified structural diagram of a detection device for calibrating an ultrasonic phased array probe;

[0018] Figure 2 It is a schematic diagram of a specific example of a detection device for calibrating an ultrasonic phased array probe. DETAILED DESCRIPTION

[0019] The present invention will be further explained below in conjunction with specific implementation plans, but the present invention is not limited thereto. The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0020] like Figure 2 As shown, the specific implementation of the system can be as follows:

[0021] Step 1: The main control computer (600) is an industrial computer; the data communication line (601) connecting it to the signal generator (400) is a serial port extension line (one end is a male connector and the other end is a female connector).

[0022] Step 2: The data communication line (601) connected to the channel converter (300) is a USB printer connection line with a B-type port; the data communication line (601) connected to the oscilloscope (500) is a USB printer connection line with a B-type port.

[0023] Step 3: The channel converter (300) is a radio frequency channel switch; the signal generator (400) is DPR-300; the oscilloscope (500) is DS1000Z-E; and the channel converter connector (301) is a radio frequency line.

[0024] Step 4: The ultrasonic phased array probe connector (201) to be calibrated is a radio frequency line; the signal generator connection line (401) is a universal BNC connection line; the ultrasonic phased array probe to be calibrated (200) is a calibrated object, and the standard sample block (100) is an ultrasonic sample block.

[0025] Step 5: When the detection device for calibrating the ultrasonic phased array probe is working, the main control computer (600) first controls the channel converter (300) to switch to the specified channel, and then the main control computer (600) controls the signal generator (400) to generate a standard excitation signal. The excitation signal is injected into the channel converter (300) through the channel converter connector (301), and enters the calibrated ultrasonic phased array probe connector (201) through the radio frequency path inside the channel converter (300) and enters the specified radio frequency path inside the calibrated ultrasonic phased array probe (200), and finally excites the corresponding chip inside the calibrated ultrasonic phased array probe (200).

[0026] Step 6: When the chip is excited, a corresponding ultrasonic signal is generated. The signal enters the standard sample block (100) and is reflected back to the chip inside the calibrated ultrasonic phased array probe (200). At this time, the chip generates a specific signal and then passes through the calibrated ultrasonic phased array probe connector (201), the channel converter (300) and the channel converter connector (301) in sequence into the signal generator (400), and then undergoes signal processing processes such as amplification and filtering inside the signal generator (400).

[0027] Step 7: The signal generator is connected to the oscilloscope (500) through the signal generator connecting line (401). The oscilloscope (500) captures the waveform and processes the corresponding digital signal under the control of the main control computer (600). Finally, the processing result is fed back to the main control computer (600). The main control computer (600) analyzes and processes the data fed back by the oscilloscope (500) again to complete the automatic switching calibration.

[0028] Matters not covered by the present invention are known technologies.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detection device for calibrating an ultrasonic phased array probe, characterized in that: It includes a signal generator, a standard sample block, a channel adapter, a main control computer, and an ultrasonic phased array probe to be calibrated; The standard sample block is arranged in front of the ultrasonic phased array probe to be calibrated, the ultrasonic phased array probe to be calibrated is connected to the channel adapter through a connector, the channel adapter is connected to the signal generator through a channel converter connector, the signal generator is connected to the oscilloscope through a signal generator connecting line, and the main control computer is respectively connected to the channel adapter, the signal generator and the main control computer through a data communication line.

2. The detection device for calibrating an ultrasonic phased array probe according to claim 1, characterized in that: The signal generator is used to stimulate the corresponding phased array ultrasonic probe chip and emit ultrasonic signals; the standard sample block is used to reflect ultrasonic signals; the channel adapter is used to forward the signal of the corresponding channel of the phased array probe; the main control computer is used to control the signal generator, the oscilloscope and the channel adapter to work together, and to perform digital signal processing on the collected signals and display the calibrated results; the calibrated ultrasonic phased array probe is used as the calibration object; the data communication line is used to connect the main control computer with the channel adapter, the signal generator and the oscilloscope, and perform corresponding control.

3. The detection device for calibrating an ultrasonic phased array probe according to claim 1, characterized in that: The main control computer is an industrial computer, and the data communication line connected to the signal generator is a serial port extension line; the data communication line connected to the channel converter is a USB printer connection line with a B-type port; The data communication line connecting it with the oscilloscope is a USB printer connection line with a B-type port.

4. The detection device for calibrating an ultrasonic phased array probe according to claim 1, characterized in that: The channel converter is a radio frequency channel switch; the signal generator is DPR-300; the oscilloscope is DS1000Z-E; and the channel converter connector is a radio frequency line.

5. The detection device for calibrating an ultrasonic phased array probe according to claim 1, characterized in that: The ultrasonic phased array probe connector to be calibrated is a radio frequency line; the signal generator connection line is a universal BNC connection line; and the ultrasonic phased array probe to be calibrated is the object to be calibrated.

6. The detection device for calibrating an ultrasonic phased array probe according to claim 1, characterized in that: The standard sample block is an ultrasonic sample block.

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