Kilowatt-class high-power high-delay precision ultrasonic phased array excitation device and method

Abstract

The present application discloses a kilowatt-class high-power high-delay precision ultrasonic phased array excitation device and method, which relates to the field of ultrasonic non-destructive testing technology. The multi-channel transmitting module sequentially excites each transmitting channel according to preset working parameters, so that each transmitting channel generates a pulse excitation signal. The transducer detects the component under test based on the pulse excitation signal generated by each transmitting channel, and obtains the detection electrical signal corresponding to each transmitting channel. The multi-channel receiving module performs signal conditioning on the detection electrical signal corresponding to each transmitting channel to obtain the conditioned electrical signal corresponding to each receiving channel. The channel delay measurement module measures the actual delay time between two adjacent transmitting channels, and the upper computer performs imaging based on the conditioned electrical signal and the actual delay time to obtain the detection result. The present application can accurately measure the actual delay time between two adjacent transmitting channels, and subsequently perform imaging based on the actual delay time, which can improve the imaging accuracy.

Description

Technical Field

[0001] The present application relates to the technical field of ultrasonic nondestructive testing, and in particular to a kilowatt-class high-power high-delay precision ultrasonic phased array excitation device and method. Background Art

[0002] Ultrasonic phased array detection technology can detect defects of the tested parts without contacting the surface of the tested parts. It has the advantages of non-contact and non-destructiveness. It is a relatively mature product and is widely used in the field of industrial detection. The ultrasonic phased array device is mainly composed of a host computer, a transmitting module, a receiving module, and a transducer. The host computer sets the waveform parameters and delay parameters required by the transmitting module. The transmitting module excites each transmitting channel in order according to the delay parameters, and generates a high-voltage signal according to the waveform parameters. The high-voltage signal is transmitted to the transducer. The transducer realizes the excitation of ultrasonic waves, performs defect detection on the tested parts and generates a detection electrical signal. The detection electrical signal is transmitted to the receiving module. The receiving module performs signal conditioning on the detection electrical signal and sends the conditioned electrical signal to the host computer through the USB (Universal Serial Bus) or PCIE (Peripheral Component Interconnect Express, a high-speed serial computer expansion bus standard) port. The host computer processes the conditioned electrical signal according to the delay parameters of the transmitting module to realize imaging of the defect position of the tested parts.

[0003] The accuracy of inter-channel delay is a key factor affecting the acoustic beam synthesis and imaging of ultrasonic phased array. The first key factor affecting the accuracy of inter-channel delay of ultrasonic phased array is the clock frequency of FPGA (Field-Programmable Gate Array) counter. The channel delay of ultrasonic phased array devices is in the nanosecond level. The principle is that the phase-locked loop inside the FPGA generates a clock with a fixed frequency, which is used to implement the FPGA counter. When the counter counts to the specified value, the corresponding transmitting channel is stimulated. However, the control of channel delay by the counter will introduce delay error. Since the transmitting module of the ultrasonic phased array device contains FPGA module, digital-to-analog conversion module, and high-voltage amplifier module, in addition to the delay error introduced by the FPGA counter to control the channel delay itself, the second key factor affecting the accuracy of inter-channel delay of ultrasonic phased array is the digital-to-analog conversion module. The digital-to-analog conversion module will also introduce hardware delay, resulting in delay error. The third key factor affecting the accuracy of inter-channel delay of ultrasonic phased array is the high-voltage amplifier module. In the process of converting low-voltage signals to high-voltage signals, the high-voltage power supply and amplifier circuit in the high-voltage amplifier module are involved, which will also introduce hardware delay, resulting in delay error. In summary, the transmitting module will introduce multiple hardware delays, and it is impossible to stimulate each transmitting channel strictly according to the delay parameters set by the host computer.

[0004] As the number of transmitting channels of ultrasonic phased array devices increases, the impact of inter-channel delay accuracy on the final detection results will become increasingly greater. For example, the delay accuracy of the transmitting module will affect the accuracy of the sound beam scanning angle, resulting in different error sidelobes. The error sidelobes will affect the system resolution. However, there is currently no ultrasonic phased array device that can describe the precise value of the channel delay. High-voltage transmission will cause a significant decrease in the inter-channel delay accuracy, which will in turn reduce the deflection angle or focusing accuracy of the ultrasonic phased array sound beam synthesis, reduce the delay accuracy of the received signal, and cause a sharp drop in the defect imaging accuracy. Summary of the invention

[0005] The purpose of this application is to provide a kilowatt-class high-power and high-delay precision ultrasonic phased array excitation device and method, which can accurately measure the channel delay between transmission channels and improve imaging accuracy.

[0006] To achieve the above objectives, this application provides the following solutions.

[0007] In the first aspect, the present application provides a kilowatt-class high-power and high-delay precision ultrasonic phased array excitation device, which includes: a host computer, a multi-channel transmitting module, a transducer, a multi-channel receiving module and a channel delay measurement module.

[0008] A multi-channel transmitting module includes multiple transmitting channels, which are used to sequentially excite each transmitting channel according to preset working parameters so that each transmitting channel generates a pulse excitation signal; the working parameters include the amplitude and frequency of the excitation waveform and the delay time between each transmitting channel.

[0009] The transducer is connected to the multi-channel transmitting module and the multi-channel receiving module, and is used to detect the component under test based on the pulse excitation signal generated by each transmitting channel, receive the echo signal of the component under test, and convert it to obtain the detection electrical signal corresponding to each transmitting channel.

[0010] The multi-channel receiving module includes a plurality of receiving channels, each of which corresponds to a transmitting channel one by one, and is used to perform signal conditioning on the detection electrical signals corresponding to each transmitting channel to obtain the conditioned electrical signals corresponding to each receiving channel.

[0011] The channel delay measurement module is connected to the multi-channel emission module and is used to measure the actual delay time between two adjacent emission channels; the two adjacent emission channels are two adjacent emission channels after all emission channels are sorted according to the excitation order.

[0012] The host computer is respectively connected to the multi-channel transmitting module, the multi-channel receiving module and the channel delay measurement module, and is used to send working parameters to the multi-channel transmitting module, receive the conditioned electrical signals corresponding to each receiving channel output by the multi-channel receiving module and the actual delay time between two adjacent transmitting channels output by the channel delay measurement module, and perform imaging based on the conditioned electrical signals corresponding to each receiving channel and the actual delay time between two adjacent transmitting channels to obtain detection results.

[0013] Optionally, all emission channels are sorted according to the excitation order, and the channel delay measurement module includes N-1 voltage-controlled delay unit groups, the first input end of the i-th voltage-controlled delay unit group is connected to the i-th emission channel, and the second input end of the i-th voltage-controlled delay unit group is connected to the i+1-th emission channel, i=1, 2,..., N-1, and N is the total number of emission channels; when the i-th emission channel is excited, the first input end of the i-th voltage-controlled delay unit group receives a pulse excitation signal and starts timing; when the i+1 emission channel is excited, the second input end of the i-th voltage-controlled delay unit group receives a pulse excitation signal and ends timing, thereby obtaining the actual delay time between the i-th emission channel and the i+1-th emission channel.

[0014] Optionally, the structures of the N-1 voltage-controlled delay unit groups are all the same; the voltage-controlled delay unit group includes a plurality of voltage-controlled delay units, a plurality of triggers and a dynamic memory.

[0015] An input end of the first voltage-controlled delay unit is connected to a first input end of the voltage-controlled delay unit group.

[0016] The trigger corresponds to the voltage-controlled delay unit one by one; the first input end of the trigger is connected to the output end of the voltage-controlled delay unit, the second input end of the trigger is connected to the second input end of the voltage-controlled delay unit group, the first output end of the trigger is connected to the input end of the next voltage-controlled delay unit of the voltage-controlled delay unit corresponding to the trigger, and the second output end of the trigger is connected to the input end of the dynamic memory.

[0017] The output end of the dynamic memory is connected to the host computer.

[0018] Optionally, the kilowatt-class high-power and high-delay-precision ultrasonic phased array excitation device is a kilowatt-class high-power and high-delay-precision piezoelectric ultrasonic phased array excitation device or a kilowatt-class high-power and high-delay-precision electromagnetic ultrasonic phased array excitation device.

[0019] Optionally, the multi-channel transmission module also includes: a first DDR (Double Data Rate) cache module, a first FPGA module, a DAC (Digital-to-Analog Converter) module and a high-voltage amplifier module; the first FPGA module is respectively connected to the first DDR cache module and the DAC module, and the DAC module is connected to the high-voltage amplifier module.

[0020] The first DDR buffer module is used to buffer the working parameters sent by the host computer.

[0021] The first FPGA module is used to generate a digital excitation signal based on the operating parameters.

[0022] The DAC module is used to perform digital-to-analog conversion on the digital excitation signal to obtain an analog excitation signal.

[0023] The high voltage amplifier module is used to amplify the analog excitation signal to obtain a pulse excitation signal.

[0024] Optionally, the high-voltage amplification module includes a kilowatt high-power pulse power supply, and the kilowatt high-power pulse power supply includes a bidirectional high-voltage positive and negative pulse generating circuit, a transformer module and a load circuit connected in sequence.

[0025] The bidirectional high-voltage positive and negative pulse generating circuit includes a first power supply, a second power supply, a third power supply, a fourth power supply, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a first diode, a second diode, a third diode and a fourth diode.

[0026] The first end of the first power supply is connected to the first end of the first switch tube, the second end of the first power supply is grounded, the second end of the first switch tube is connected to the high voltage power supply, and the third end of the first switch tube is connected to the anode of the first diode.

[0027] The first end of the second power supply is connected to the first end of the second switch tube, the second end of the second power supply is grounded, the second end of the second switch tube is grounded, and the third end of the second switch tube is connected to the cathode of the second diode.

[0028] The first end of the third power supply is connected to the first end of the third switch tube, the second end of the third power supply is grounded, the second end of the third switch tube is connected to the high voltage power supply, and the third end of the third switch tube is connected to the anode of the fourth diode.

[0029] The first end of the fourth power supply is connected to the first end of the fourth switch tube, the second end of the fourth power supply is grounded, the second end of the fourth switch tube is grounded, and the third end of the fourth switch tube is connected to the cathode of the third diode.

[0030] The cathode of the first diode is respectively connected to the first input end of the transformer module and the anode of the second diode, and the anode of the second diode is connected to the resistor and the capacitor and then grounded; the anode of the third diode is respectively connected to the second input end of the transformer module and the cathode of the fourth diode, and the cathode of the fourth diode is connected to the resistor and the capacitor and then grounded.

[0031] Optionally, the transformer module includes a first transformer, a second transformer, a first capacitor and a second capacitor.

[0032] The first end of the primary coil of the first transformer is connected to the first input end of the transformer module, the second end of the primary coil of the first transformer is connected to the second input end of the transformer module, the first end of the secondary coil of the first transformer is connected to the first end of the first capacitor, the second end of the secondary coil of the first transformer is connected to the first end of the primary coil of the second transformer, the second end of the first capacitor is connected to the first end of the load circuit, the second end of the primary coil of the second transformer is respectively connected to the second end of the load circuit and the first end of the second capacitor, the first end of the secondary coil of the second transformer is grounded, and the second end of the secondary coil of the second transformer is connected to the second end of the second capacitor; the first end of the load circuit is the output end of the kilowatt high-power pulse power supply.

[0033] Optionally, the multi-channel receiving module further includes: a gain amplifier circuit, a filter circuit, an ADC (Analog-to-Digital Converter) module, a second FPGA module and a second DDR cache module.

[0034] The gain amplifier circuit is used to amplify the detection electrical signal to obtain an amplified electrical signal.

[0035] The filter circuit is connected to the gain amplifier circuit and is used for filtering the amplified electrical signal to obtain a filtered electrical signal.

[0036] The ADC module is connected to the filter circuit and is used to perform analog-to-digital conversion on the filtered electrical signal to obtain a conditioned electrical signal.

[0037] The second FPGA module is connected to the ADC module and the second DDR cache module respectively, and is used to send the conditioned electrical signal to the second DDR cache module.

[0038] The second DDR buffer module is used to buffer the conditioned electrical signal and send the conditioned electrical signal to the host computer.

[0039] Optionally, the kilowatt-class high-power and high-delay precision ultrasonic phased array excitation device further includes: a display module, connected to a host computer, for completing human-computer interaction and displaying detection results.

[0040] In the second aspect, the present application provides a kilowatt-class high-power and high-delay precision ultrasonic phased array excitation method, which is applied to any of the kilowatt-class high-power and high-delay precision ultrasonic phased array excitation devices described above, and the kilowatt-class high-power and high-delay precision ultrasonic phased array excitation method includes the following steps.

[0041] The host computer sends working parameters to the multi-channel transmitting module.

[0042] The multi-channel transmitting module sequentially excites each transmitting channel according to preset working parameters, so that each transmitting channel generates a pulse excitation signal; at the same time, the channel delay measurement module measures the actual delay time between two adjacent transmitting channels; the two adjacent transmitting channels are two adjacent transmitting channels after all transmitting channels are sorted according to the excitation order.

[0043] The transducer detects the component under test based on the pulse excitation signal generated by each transmitting channel, and obtains the detection electrical signal corresponding to each transmitting channel.

[0044] The multi-channel receiving module performs signal conditioning on the detection electrical signals corresponding to each transmitting channel to obtain the conditioned electrical signals corresponding to each receiving channel.

[0045] The host computer performs imaging based on the conditioned electrical signals corresponding to each receiving channel and the actual delay time between two adjacent transmitting channels to obtain the detection results.

[0046] According to the specific embodiments provided in this application, this application has the following technical effects.

[0047] The present application provides a kilowatt-class high-power high-delay precision ultrasonic phased array excitation device and method, the device includes: a host computer, a multi-channel transmitting module, a transducer, a multi-channel receiving module and a channel delay measurement module, the multi-channel transmitting module is used to sequentially excite each transmitting channel according to preset working parameters, so that each transmitting channel generates a pulse excitation signal, the transducer is used to detect the component under test based on the pulse excitation signal generated by each transmitting channel, and obtain the detection electrical signal corresponding to each transmitting channel, the multi-channel receiving module is used to perform signal conditioning on the detection electrical signal corresponding to each transmitting channel, and obtain the conditioned electrical signal corresponding to each receiving channel, the channel delay measurement module is used to measure the actual delay time between two adjacent transmitting channels, and the host computer is used to perform imaging based on the conditioned electrical signal corresponding to each receiving channel and the actual delay time between two adjacent transmitting channels to obtain the detection result. The present application can accurately measure the actual delay time between two adjacent transmitting channels through the innovative design of the channel delay measurement module, and subsequently perform imaging based on the actual delay time, which can improve the imaging accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 A schematic structural diagram of a kilowatt-class high-power and high-delay precision ultrasonic phased array excitation device provided in Example 1 of the present application.

[0050] Figure 2 This is a data transmission schematic diagram of a kilowatt-class high-power and high-delay precision ultrasonic phased array excitation device provided in Example 1 of the present application.

[0051] Figure 3 This is a schematic diagram of the multi-emission channel excitation timing provided in Example 1 of the present application.

[0052] Figure 4 This is a schematic diagram of the structure of the channel delay measurement module provided in Example 1 of the present application.

[0053] Figure 5 This is a connection diagram of the channel delay measurement module provided in Example 1 of the present application.

[0054] Figure 6 This is a schematic diagram of the structure of the voltage-controlled delay unit group provided in Example 1 of the present application.

[0055] Figure 7 This is a schematic diagram of the structure of the kilowatt high-power pulse power supply provided in Example 1 of the present application.

[0056] Figure 8 This is a schematic diagram of the detection results of the existing ultrasonic phased array provided in Example 1 of the present application.

[0057] Fig. 9 This is a schematic diagram of the detection results of the ultrasonic phased array provided in Example 1 of the present application.

[0058] Fig.10 A method flow chart of a kilowatt-class high-power and high-delay precision ultrasonic phased array excitation method provided in Example 2 of the present application.

[0059] Fig.11 A detection flow chart of a kilowatt-class high-power and high-delay precision ultrasonic phased array excitation method provided in Example 2 of the present application.

[0060] Figure markings: 1-host computer; 2-multi-channel transmitting module; 21-first DDR cache module; 22-first FPGA module; 23-DAC module; 24-high-voltage amplifier module; 3-transducer; 4-multi-channel receiving module; 41-gain amplifier circuit; 42-filter circuit; 43-ADC module; 44-second FPGA module; 45-second DDR cache module; 5-channel delay measurement module; 51-voltage-controlled delay unit group; 511-voltage-controlled delay unit; 512-trigger; 513-dynamic memory. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0062] Example 1.

[0063] This embodiment provides a kilowatt-class high-power high-delay precision ultrasonic phased array excitation device, such as Figure 1 As shown, the kilowatt-class high-power and high-delay precision ultrasonic phased array excitation device includes: a host computer 1, a multi-channel transmitting module 2, a transducer 3, a multi-channel receiving module 4 and a channel delay measurement module 5.

[0064] The multi-channel transmitting module 2 includes multiple transmitting channels, which are used to sequentially excite each transmitting channel according to preset working parameters so that each transmitting channel generates a pulse excitation signal. The working parameters include the amplitude and frequency of the excitation waveform and the delay time between each transmitting channel.

[0065] The transducer 3 is connected to the multi-channel transmitting module 2 and the multi-channel receiving module 4, and is used to detect the component under test based on the pulse excitation signal generated by each transmitting channel, receive the echo signal of the component under test, and convert it to obtain the detection electrical signal corresponding to each transmitting channel.

[0066] The multi-channel receiving module 4 includes a plurality of receiving channels, each of which corresponds to a transmitting channel one by one, and is used to perform signal conditioning on the detection electrical signal corresponding to each transmitting channel to obtain a conditioned electrical signal corresponding to each receiving channel.

[0067] The channel delay measurement module 5 is connected to the multi-channel transmission module 2 and is used to measure the actual delay time between two adjacent transmission channels. The two adjacent transmission channels are two adjacent transmission channels after all transmission channels are sorted according to the excitation order.

[0068] The host computer 1 is respectively connected to the multi-channel transmitting module 2, the multi-channel receiving module 4 and the channel delay measurement module 5, and is used to send working parameters to the multi-channel transmitting module 2, receive the conditioned electrical signals corresponding to each receiving channel output by the multi-channel receiving module 4 and the actual delay time between two adjacent transmitting channels output by the channel delay measurement module 5, and perform imaging based on the conditioned electrical signals corresponding to each receiving channel and the actual delay time between two adjacent transmitting channels to obtain detection results.

[0069] like Figure 2 As shown, the host computer 1 sets the waveform parameters and delay parameters according to the on-site environment and the size of the tested component. The waveform parameters include the amplitude (which is the voltage value) and frequency of the excitation waveform, and the delay parameters include the delay time between each transmission channel. The waveform parameters are sent to the multi-channel transmission module 2 via USB. The multi-channel transmission module 2 sequentially excites each transmission channel to generate a pulse excitation signal, such as Figure 3 As shown, the transducer 3 detects the component under test based on the pulse excitation signal to generate a detection electrical signal, the multi-channel receiving module 4 performs signal conditioning on the detection electrical signal to obtain a conditioned electrical signal, and at the same time, the channel delay measurement module 5 measures the actual delay time between the transmission channels, and the host computer 1 receives the conditioned electrical signal and the actual delay time. The traditional ultrasonic phased array device determines the valid data of the conditioned electrical signal according to the delay time set by the FPGA, and further performs imaging. In this embodiment, the host computer 1 determines the valid data of the conditioned electrical signal according to the measured actual delay time, discards the invalid data within the delay time, and further performs waveform superposition calculation based on the conditioned electrical signal output by the multi-channel receiving module 4 and the actual delay time output by the channel delay measurement module 5, and performs imaging in conjunction with the host computer program, thereby improving the imaging accuracy. It should be noted that the measurement process of the channel delay measurement module 5 and the process of the multi-channel transmitting module 2 exciting the transmission channel are parallel, and the delay will be measured when the transmission channel is excited, and the channel delay measurement module 5 will not introduce delay.

[0070] like Figure 1As shown, the multi-channel transmitting module 2 is used to excite each transmitting channel according to the waveform parameters and delay parameters set by the host computer 1. The multi-channel transmitting module 2 contains multiple transmitting channels, a first FPGA module 22, a first DDR cache module 21, a digital-to-analog conversion module (i.e., a DAC module 23) and a high-voltage amplifier module 24. The host computer data is transmitted to the first DDR cache module 21 via USB. The first FPGA module 22 serves as a core controller to control the transmission of the host computer data to the DAC module 23. The generated low-voltage signal is amplified by the high-voltage amplifier module 24 to obtain a high-voltage signal (i.e., a pulse excitation signal). The high-voltage signal is transmitted to the transmitting channel to excite the transmitting channel, and the high-voltage signal is provided to the transducer 3 through the transmitting channel. At the same time, the high-voltage signal is transmitted to the channel delay measurement module 5 to measure the actual delay time.

[0071] At this time, in this embodiment, the multi-channel transmission module 2 also includes: a first DDR cache module 21, a first FPGA module 22, a DAC module 23 and a high-voltage amplifier module 24, the first FPGA module 22 is respectively connected to the first DDR cache module 21 and the DAC module 23, and the DAC module 23 is connected to the high-voltage amplifier module 24.

[0072] The first DDR buffer module 21 is used to buffer the working parameters sent by the host computer 1 .

[0073] The first FPGA module 22 is used to generate a digital excitation signal based on the operating parameters.

[0074] The DAC module 23 is used to perform digital-to-analog conversion on the digital excitation signal to obtain an analog excitation signal.

[0075] The high-voltage amplification module 24 is used to amplify the analog excitation signal to obtain a pulse excitation signal.

[0076] The transducer 3 is used to receive the pulse excitation signal generated by the multi-channel transmitting module 2, transmit ultrasonic waves to the surface of the measured component, and receive the echo signal reflected by the surface of the measured component, and further convert the echo signal into an alternating detection electrical signal.

[0077] The multi-channel receiving module 4 includes multiple receiving channels, a gain amplifier circuit 41, a filter circuit 42, an ADC module 43, a second FPGA module 44, and a second DDR cache module 45. According to the excitation timing, multiple receiving channels are sampled synchronously, the gain amplifier circuit 41 will amplify the millivolt level signal to the volt level, and the volt level signal will be removed by the filter circuit 42 to facilitate the ADC module 43 to sample and perform analog-to-digital conversion. The sampled data needs to be temporarily stored in the second DDR cache module 45, and after the cache is completed, it is transmitted to the host computer 1 via USB.

[0078] At this time, in this embodiment, the multi-channel receiving module 4 further includes: a gain amplifier circuit 41 , a filter circuit 42 , an ADC module 43 , a second FPGA module 44 and a second DDR cache module 45 .

[0079] The gain amplifier circuit 41 is used to amplify the detection electrical signal to obtain an amplified electrical signal.

[0080] The filter circuit 42 is connected to the gain amplifier circuit 41 and is used to filter the amplified electrical signal to obtain a filtered electrical signal.

[0081] The ADC module 43 is connected to the filter circuit 42 and is used to perform analog-to-digital conversion on the filtered electrical signal to obtain a conditioned electrical signal.

[0082] The second FPGA module 44 is connected to the ADC module 43 and the second DDR cache module 45 respectively, and is used to send the conditioned electrical signal to the second DDR cache module 45 .

[0083] The second DDR buffer module 45 is used for buffering the conditioned electrical signal and sending the conditioned electrical signal to the host computer 1 .

[0084] The channel delay measurement module 5 is used to measure the actual value of the transmission delay of each transmission channel in the multi-channel transmission module 2, and feed it back to the host computer 1 at the same time, such as Figure 4 As shown, the channel delay measurement module 5 includes a plurality of voltage-controlled delay unit groups 51, such as Figure 5 As shown, the 1st to N-1st transmission channels are connected to the start port of each voltage-controlled delay unit group 51 of the channel delay measurement module 5, and the 2nd to Nth transmission channels are connected to the stop port of each voltage-controlled delay unit group 51 of the channel delay measurement module 5, as shown in FIG. Figure 6 As shown, each voltage-controlled delay unit group 51 includes a plurality of voltage-controlled delay units 511 , a plurality of triggers 512 and a dynamic memory 513 .

[0085] At this time, in this embodiment, all emission channels are sorted according to the excitation order, and the channel delay measurement module 5 includes N-1 voltage-controlled delay unit groups 51, the first input end (i.e., the start port) of the i-th voltage-controlled delay unit group 51 is connected to the i-th emission channel, and the second input end (i.e., the stop port) of the i-th voltage-controlled delay unit group 51 is connected to the i+1-th emission channel, i=1, 2, ..., N-1, and N is the total number of emission channels.

[0086] When the i-th transmission channel is excited, the first input end of the i-th voltage-controlled delay unit group 51 receives a pulse excitation signal and starts timing. When the i+1 transmission channel is excited, the second input end of the i-th voltage-controlled delay unit group 51 receives a pulse excitation signal and ends timing, thereby obtaining the actual delay time between the i-th transmission channel and the i+1-th transmission channel.

[0087] like Figure 6 As shown, the structures of N-1 voltage-controlled delay unit groups 51 are all the same, and the voltage-controlled delay unit group 51 includes multiple voltage-controlled delay units 511, multiple triggers 512 and a dynamic memory 513. The input end of the first voltage-controlled delay unit 511 is connected to the first input end of the voltage-controlled delay unit group 51. The trigger 512 corresponds to the voltage-controlled delay unit 511 one by one, the first input end of the trigger 512 is connected to the output end of the voltage-controlled delay unit 511, the second input end of the trigger 512 is connected to the second input end of the voltage-controlled delay unit group 51, the first output end of the trigger 512 is connected to the input end of the next voltage-controlled delay unit 511 of the voltage-controlled delay unit 511 corresponding to the trigger 512, the second output end of the trigger 512 is connected to the input end of the dynamic memory 513, and the output end of the dynamic memory 513 is connected to the host computer 1.

[0088] In this embodiment, there are N transmitting channels in total, the first N-1 transmitting channels are connected to the start port, and the last N-1 transmitting channels are connected to the stop port. When the first transmitting channel is excited, the start port of the first voltage-controlled delay unit group 51 starts to work. When the second transmitting channel is excited, the stop port of the first voltage-controlled delay unit group 51 and the start port of the second voltage-controlled delay unit group 51 start to work. The actual delay time between the first transmitting channel and the second transmitting channel is measured by the first voltage-controlled delay unit group 51. When the third transmitting channel is excited, the stop port of the second voltage-controlled delay unit group 51 starts to work. The op port and the start port of the third voltage-controlled delay unit group 51 start working, and the actual delay time between the second transmission channel and the third transmission channel is measured by the second voltage-controlled delay unit group 51. Similarly, when the Nth transmission channel is excited, the stop port of the N-1th voltage-controlled delay unit group 51 starts working, and the actual delay time between the N-1th transmission channel and the Nth transmission channel is measured by the N-1th voltage-controlled delay unit group 51. The measurement result of the actual delay time between every two transmission channels is sent to the dynamic memory 513 for temporary storage, and then uploaded to the host computer 1 via USB.

[0089] The measurement principle of the voltage-controlled delay unit group 51 is as follows: the electrical signal will cause the voltage-controlled delay unit 511 to generate a small delay (in picoseconds) with Td as the unit. When the start port starts working, the voltage-controlled delay unit 511 starts working. Each voltage-controlled delay unit 511 is connected to a trigger 512. The electrical signal (i.e. Figure 6 The electrical signal in the voltage-controlled delay unit 511 reaches the first voltage-controlled delay unit 511, and the timing starts. When the timing ends, the trigger 512 corresponding to the voltage-controlled delay unit 511 will be set to 1, and the trigger 512 will trigger the next voltage-controlled delay unit 511 to start timing. When the stop port starts working, it triggers the generation of a rising pulse, which will output the results of all triggers 512 to the dynamic memory 513. The dynamic memory 513 will send a string of binary digits to the host computer 1 through the USB. The host computer 1 can determine the actual delay time based on the string of binary digits.

[0090] The kilowatt-class high-power and high-delay-precision ultrasonic phased array excitation device of this embodiment is a kilowatt-class high-power and high-delay-precision piezoelectric ultrasonic phased array excitation device or a kilowatt-class high-power and high-delay-precision electromagnetic ultrasonic phased array excitation device.

[0091] The voltage of the transmitting module of the piezoelectric ultrasonic phased array is generally 100V, and the voltage of the transmitting module of the electromagnetic ultrasonic phased array generally needs to be greater than 500V. Based on this, the high-voltage amplification module 24 of this embodiment is designed to include a KW-level high-power pulse power supply (i.e., a kilowatt high-power pulse power supply). The KW-level high-power pulse power supply includes a bidirectional high-voltage positive and negative pulse generating circuit, a transformer module, and a load circuit, such as Figure 7 As shown, the bidirectional high-voltage positive and negative pulse generating circuit on the left side utilizes the unidirectional conduction function of the diode and the voltage control function of the switch tube (the switch tube can be a MOS (Metal-Oxide-Semiconductor) tube). When the power supply VG1 and VG4 are started, the switch tubes T1 and T4 are turned on, the diodes D1 and D3 are turned on, and the N1 side of the transformer M1 forms a 10kv high voltage from top to bottom. When the power supply VG2 and VG3 are started, the switch tubes T2 and T3 are turned on, the diodes D4 and D2 are turned on, and the N1 side of the transformer M1 forms a 10kv high voltage from bottom to top. By controlling the conduction of the power supply VG1~VG4, high-frequency high-voltage positive and negative pulses are formed. Compared with the traditional transformer whose transformer turns ratio is generally 1:3, this embodiment can increase the transformer turns ratio of the transformer to 1:5, so that the load side can achieve a higher voltage, and can form a kilovolt-level high voltage on both sides of the load.

[0092] At this time, in this embodiment, the high-voltage amplification module 24 includes a kilowatt high-power pulse power supply, and the kilowatt high-power pulse power supply includes a bidirectional high-voltage positive and negative pulse generating circuit, a transformer module and a load circuit connected in sequence.

[0093] The bidirectional high-voltage positive and negative pulse generating circuit includes a first power supply VG1, a second power supply VG2, a third power supply VG3, a fourth power supply VG4, a first switch tube T1, a second switch tube T2, a third switch tube T3, a fourth switch tube T4, a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4. The first end of the first power supply VG1 is connected to the first end of the first switch tube T1, the second end of the first power supply VG1 is grounded, the second end of the first switch tube T1 is connected to the high-voltage power supply HV, and the third end of the first switch tube T1 is connected to the anode of the first diode D1. The first end of the second power supply VG2 is connected to the first end of the second switch tube T2, the second end of the second power supply VG2 is grounded, the second end of the second switch tube T2 is grounded, and the third end of the second switch tube T2 is connected to the cathode of the second diode D2. The first end of the third power supply VG3 is connected to the first end of the third switch tube T3, the second end of the third power supply VG3 is grounded, the second end of the third switch tube T3 is connected to the high-voltage power supply HV, and the third end of the third switch tube T3 is connected to the anode of the fourth diode D4. The first end of the fourth power supply VG4 is connected to the first end of the fourth switch tube T4, the second end of the fourth power supply VG4 is grounded, the second end of the fourth switch tube T4 is grounded, and the third end of the fourth switch tube T4 is connected to the cathode of the third diode D3. The cathode of the first diode D1 is connected to the first input end of the transformer module and the anode of the second diode D2 respectively, and the anode of the second diode D2 is connected to the resistor R4 and the capacitor C5 and then grounded. The anode of the third diode D3 is connected to the second input end of the transformer module and the cathode of the fourth diode D4 respectively, and the cathode of the fourth diode D4 is connected to the resistor R3 and the capacitor C6 and then grounded.

[0094] The transformer module includes a first transformer M1, a second transformer M2, a first capacitor C1 and a second capacitor C2. The first end of the primary coil of the first transformer M1 is connected to the first input end of the transformer module, the second end of the primary coil of the first transformer M1 is connected to the second input end of the transformer module, the first end of the secondary coil of the first transformer M1 is connected to the first end of the first capacitor C1, the second end of the secondary coil of the first transformer M1 is connected to the first end of the primary coil of the second transformer M2, the second end of the first capacitor C1 is connected to the first end of the load circuit LOAD, the second end of the primary coil of the second transformer M2 is respectively connected to the second end of the load circuit LOAD and the first end of the second capacitor C2, the first end of the secondary coil of the second transformer M2 is grounded, the second end of the secondary coil of the second transformer M2 is connected to the second end of the second capacitor C2, and the first end of the load circuit LOAD is the output end Vout of the kilowatt high-power pulse power supply.

[0095] The kilowatt-class high-power and high-delay precision ultrasonic phased array excitation device of this embodiment further includes: a display module connected to the host computer 1 for completing human-computer interaction and displaying detection results.

[0096] In order to solve the problem of how to achieve high-precision delay control under high-power transmission of an ultrasonic phased array, this embodiment provides an ultrasonic phased array picosecond-level high-delay precision control device under kilowatt high-power excitation, which can achieve picosecond-level precise control of channel delay time under kilowatt high-power excitation, thereby improving the accuracy of waveform synthesis of the host computer 1 and the accuracy of defect imaging. This embodiment designs a novel ultrasonic phased array excitation device, including a high-power and high-delay precision multi-channel transmitting module 2, a channel delay measurement module 5 with picosecond measurement precision, a transducer 3, a high-gain and low-noise multi-channel receiving module 4, and a host computer 1. The precise scanning of the ultrasonic phased array is realized through a self-compiled operation interface. The channel delay measurement module 5 and a kilowatt high-power pulse power supply are added to improve the transmission power of the ultrasonic phased array, and picosecond delay measurement and kV-level high-voltage excitation can be realized. At the same time, the measurement results are sent to the host computer 1. The host computer 1 uses the measured value of the actual delay time to replace the delay time set by the program, and calculates according to the actual measurement results. On the basis of the traditional ultrasonic phased array, the detection accuracy, detection depth and detection range are greatly improved.

[0097] The host computer 1 sets the waveform parameters and delay parameters according to the on-site environment and the size of the component under test, and sends them to the multi-channel transmitting module 2 via USB. The first FPGA module 22 in the multi-channel transmitting module 2 controls the host computer data to be cached to the first DDR cache module 21. After the transmission data cache is completed once, the first FPGA module 22 controls the host computer data to be transmitted to the DAC module 23, forming N low-voltage signals with a voltage of ±1v. After the low-voltage signal is amplified by the high-voltage amplifier module 24, the generated high-voltage signal is transmitted to the channel delay measurement module 5, and the transmitting channel is stimulated at the same time. At this time, the voltage value reaches kv. When the first high-voltage signal is transmitted to the channel delay measurement module 5, the start signal will be driven to start measurement. The fixed voltage will cause the voltage-controlled delay unit 511 in the voltage-controlled delay unit group 51 to produce a small delay in units of Td. When the start signal starts to be excited, the voltage-controlled delay unit 511 starts to work. Each voltage-controlled delay unit 511 is connected to a trigger 512. When the electrical signal passes through a voltage-controlled delay unit 511, the trigger 512 will be set to 1. When the second high-voltage signal is excited, the corresponding stop signal will be triggered to generate a rising pulse. The rising pulse will output the result of the trigger 512 to the dynamic memory 513, and the dynamic memory 513 will send a string of binary digits to the host computer 1 via USB. The high-voltage signal continues to drive the transducer 3 to work, and the transducer 3 coil excites a high-frequency signal, thereby inducing an alternating eddy current in the measured component, generating a Lorentz force under the action of the magnetic field, and exciting multiple ultrasonic waves in the measured component. The ultrasonic waves encounter the defect position and form a reflection. The echo signal containing the defect information will induce an alternating electrical signal in the coil, which will be converted into a detection electrical signal again through the transducer 3 and transmitted to the multi-channel receiving module 4. When the multi-channel transmitting module 2 is excited, it will drive the multi-channel receiving module 4 to start timing. When the timing ends, the multi-channel receiving module 4 starts to receive echo data. The gain amplifier circuit 41 amplifies the signal to the volt level, the filter circuit 42 removes noise, the ADC module 43 samples the echo data, and the second DDR cache module 45 temporarily stores it. After the data is cached, it is transmitted to the host computer 1 via USB. The host computer 1 determines the valid data based on the actual measurement value, discards the invalid data within the channel delay time, and cooperates with the host computer program to form an image. The defective test block is detected and imaged. The detection results of the traditional ultrasonic phased array are as follows: Figure 8 As shown, the detection results of the ultrasonic phased array of this embodiment are as follows Fig. 9 As shown, it is obvious that the imaging defects of the detection results of the traditional ultrasonic phased array are distorted, while the imaging of the detection results of the ultrasonic phased array in this embodiment is clearer and more accurate.

[0098] The key point of this embodiment is to add a channel delay measurement module 5, which will measure the actual delay time between the transmission channels and send the measurement results to the host computer 1. The traditional ultrasonic phased array will determine the valid data according to the delay time set by the FPGA, while the host computer 1 in this embodiment determines the valid data according to the measured value of the actual delay time. The host computer 1 will synthesize the waveform according to the measurement result and valid data of the channel delay measurement module 5 using the waveform synthesis formula, and the imaging accuracy is higher. And the high-voltage amplification of the kilovolt level is added, and the excitation voltage is higher than that of the traditional ultrasonic phased array. This embodiment solves the problem of high transmission delay accuracy control under high-voltage and high-power excitation of the electromagnetic ultrasonic phased array, and is also suitable for improving the transmission delay accuracy of the piezoelectric ultrasonic phased array. The ultrasonic phased array device designed and implemented by this embodiment can accurately measure the precise value of the channel delay, and at the same time, the result is sent to the host computer 1. In this way, the host computer 1 will calculate the imaging data according to the actual channel delay time, which can ensure higher imaging accuracy, more accurate defect position measurement, and more accurate defect size and area. At the same time, high-power excitation at the kilovolt level enables ultrasonic phased array devices to be used in farther and deeper usage scenarios.

[0099] In the traditional ultrasonic phased array device, the channel delay controlled by FPGA can only be realized based on the counter, while the actual delay situation cannot be represented, and the hardware delay cannot be avoided, which will have a certain impact on the imaging of the data received by the host computer 1. This embodiment adds a channel delay measurement module 5 on the basis of the traditional ultrasonic phased array. The host computer 1 can accurately introduce the actual delay time into the waveform synthesis formula, which is more accurate when calculating the echo signal, and improves the imaging accuracy. This embodiment further designs a kilowatt high-power pulse power supply in the high-voltage amplifier module 24, which can achieve a kilowatt high-power output and can improve the depth and range of ultrasonic detection. This embodiment can solve the problem that the multi-channel transmitting module 2 in the existing ultrasonic phased array device introduces hardware delay, and the delay of each channel cannot be strictly set according to the program to excite the transducer 3, improve the imaging accuracy, and at the same time increase the power of the transmitting module, which can achieve a deeper and wider range of ultrasonic detection.

[0100] Example 2.

[0101] This embodiment provides a kilowatt-class high-power high-delay precision ultrasonic phased array excitation method, which is applied to the kilowatt-class high-power high-delay precision ultrasonic phased array excitation device described in Example 1. Fig.10 and Fig.11 As shown, the kilowatt-class high-power and high-delay precision ultrasonic phased array excitation method includes the following steps.

[0102] S1: The host computer sends working parameters to the multi-channel transmitting module.

[0103] S2: The multi-channel transmitting module sequentially excites each transmitting channel according to preset working parameters, so that each transmitting channel generates a pulse excitation signal; at the same time, the channel delay measurement module measures the actual delay time between two adjacent transmitting channels; the two adjacent transmitting channels are two adjacent transmitting channels after all transmitting channels are sorted according to the excitation order.

[0104] S3: The transducer detects the component under test based on the pulse excitation signal generated by each transmitting channel, and obtains the detection electrical signal corresponding to each transmitting channel.

[0105] S4: The multi-channel receiving module performs signal conditioning on the detection electrical signals corresponding to each transmitting channel to obtain conditioned electrical signals corresponding to each receiving channel.

[0106] S5: The host computer performs imaging based on the conditioned electrical signals corresponding to each receiving channel and the actual delay time between two adjacent transmitting channels to obtain a detection result.

[0107] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A kilowatt-class high-power high-delay precision ultrasonic phased array excitation device, characterized in that: The kilowatt-class high-power high-delay precision ultrasonic phased array excitation device comprises: a host computer, a multi-channel transmitting module, a transducer, a multi-channel receiving module and a channel delay measurement module; A multi-channel transmitting module, comprising a plurality of transmitting channels, is used to sequentially excite each transmitting channel according to preset working parameters, so that each transmitting channel generates a pulse excitation signal; the working parameters include the amplitude and frequency of the excitation waveform and the delay time between each transmitting channel; The transducer is connected to the multi-channel transmitting module and the multi-channel receiving module, and is used to detect the component under test based on the pulse excitation signal generated by each transmitting channel, receive the echo signal of the component under test, and convert it to obtain the detection electrical signal corresponding to each transmitting channel; A multi-channel receiving module, including multiple receiving channels, each receiving channel corresponds to a transmitting channel one by one, and is used to perform signal conditioning on the detection electrical signal corresponding to each transmitting channel to obtain a conditioned electrical signal corresponding to each receiving channel; The channel delay measurement module is connected to the multi-channel transmission module and is used to measure the actual delay time between two adjacent transmission channels; the two adjacent transmission channels are two adjacent transmission channels after all transmission channels are sorted according to the excitation order; The host computer is respectively connected to the multi-channel transmitting module, the multi-channel receiving module and the channel delay measurement module, and is used to send working parameters to the multi-channel transmitting module, receive the conditioned electrical signals corresponding to each receiving channel output by the multi-channel receiving module and the actual delay time between two adjacent transmitting channels output by the channel delay measurement module, and perform imaging based on the conditioned electrical signals corresponding to each receiving channel and the actual delay time between two adjacent transmitting channels to obtain a detection result; All emission channels are sorted according to the excitation order, and the channel delay measurement module includes N-1 voltage-controlled delay unit groups, the first input end of the i-th voltage-controlled delay unit group is connected to the i-th emission channel, and the second input end of the i-th voltage-controlled delay unit group is connected to the i+1-th emission channel, i=1, 2, ..., N-1, and N is the total number of emission channels; When the i-th transmitting channel is excited, the first input end of the i-th voltage-controlled delay unit group receives a pulse excitation signal and starts timing. When the i+1 transmitting channel is excited, the second input end of the i-th voltage-controlled delay unit group receives a pulse excitation signal and ends timing to obtain the actual delay time between the i-th transmitting channel and the i+1-th transmitting channel.

2. The kilowatt-class high-power high-delay precision ultrasonic phased array excitation device according to claim 1 is characterized in that: The structures of N-1 voltage-controlled delay unit groups are all the same; the voltage-controlled delay unit group includes a plurality of voltage-controlled delay units, a plurality of triggers and a dynamic memory; The input end of the first voltage-controlled delay unit is connected to the first input end of the voltage-controlled delay unit group; The trigger corresponds to the voltage-controlled delay unit one by one; the first input end of the trigger is connected to the output end of the voltage-controlled delay unit, the second input end of the trigger is connected to the second input end of the voltage-controlled delay unit group, the first output end of the trigger is connected to the input end of the next voltage-controlled delay unit of the voltage-controlled delay unit corresponding to the trigger, and the second output end of the trigger is connected to the input end of the dynamic memory; The output end of the dynamic memory is connected to the host computer.

3. The kilowatt-class high-power high-delay precision ultrasonic phased array excitation device according to claim 1 is characterized in that: The kilowatt-class high-power high-delay precision ultrasonic phased array excitation device is a kilowatt-class high-power high-delay precision piezoelectric ultrasonic phased array excitation device or a kilowatt-class high-power high-delay precision electromagnetic ultrasonic phased array excitation device.

4. The kilowatt-class high-power high-delay precision ultrasonic phased array excitation device according to claim 1 is characterized in that: The multi-channel transmitting module further includes: a first DDR cache module, a first FPGA module, a DAC module and a high-voltage amplifier module; the first FPGA module is respectively connected to the first DDR cache module and the DAC module, and the DAC module is connected to the high-voltage amplifier module; The first DDR cache module is used to cache the working parameters sent by the host computer; The first FPGA module is used to generate a digital excitation signal based on the operating parameters; The DAC module is used to perform digital-to-analog conversion on the digital excitation signal to obtain an analog excitation signal; The high voltage amplifier module is used to amplify the analog excitation signal to obtain a pulse excitation signal.

5. The kilowatt-class high-power high-delay precision ultrasonic phased array excitation device according to claim 4 is characterized in that: The high-voltage amplification module includes a kilowatt high-power pulse power supply, which includes a bidirectional high-voltage positive and negative pulse generating circuit, a transformer module and a load circuit connected in sequence; The bidirectional high-voltage positive and negative pulse generating circuit comprises a first power supply, a second power supply, a third power supply, a fourth power supply, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a first diode, a second diode, a third diode and a fourth diode; A first end of the first power supply is connected to a first end of the first switch tube, a second end of the first power supply is grounded, a second end of the first switch tube is connected to a high voltage power supply, and a third end of the first switch tube is connected to an anode of the first diode; A first end of the second power supply is connected to a first end of the second switch tube, a second end of the second power supply is grounded, a second end of the second switch tube is grounded, and a third end of the second switch tube is connected to a cathode of the second diode; A first end of the third power supply is connected to a first end of the third switch tube, a second end of the third power supply is grounded, a second end of the third switch tube is connected to a high voltage power supply, and a third end of the third switch tube is connected to an anode of a fourth diode; A first end of the fourth power supply is connected to a first end of a fourth switch tube, a second end of the fourth power supply is grounded, a second end of the fourth switch tube is grounded, and a third end of the fourth switch tube is connected to a cathode of the third diode; The cathode of the first diode is respectively connected to the first input end of the transformer module and the anode of the second diode, and the anode of the second diode is connected to the resistor and the capacitor and then grounded; the anode of the third diode is respectively connected to the second input end of the transformer module and the cathode of the fourth diode, and the cathode of the fourth diode is connected to the resistor and the capacitor and then grounded.

6. The kilowatt-class high-power high-delay precision ultrasonic phased array excitation device according to claim 5 is characterized in that: The transformer module includes a first transformer, a second transformer, a first capacitor and a second capacitor; The first end of the primary coil of the first transformer is connected to the first input end of the transformer module, the second end of the primary coil of the first transformer is connected to the second input end of the transformer module, the first end of the secondary coil of the first transformer is connected to the first end of the first capacitor, the second end of the secondary coil of the first transformer is connected to the first end of the primary coil of the second transformer, the second end of the first capacitor is connected to the first end of the load circuit, the second end of the primary coil of the second transformer is respectively connected to the second end of the load circuit and the first end of the second capacitor, the first end of the secondary coil of the second transformer is grounded, and the second end of the secondary coil of the second transformer is connected to the second end of the second capacitor; the first end of the load circuit is the output end of the kilowatt high-power pulse power supply.

7. The kilowatt-class high-power high-delay precision ultrasonic phased array excitation device according to claim 1 is characterized in that: The multi-channel receiving module also includes: a gain amplifier circuit, a filter circuit, an ADC module, a second FPGA module and a second DDR cache module; A gain amplifier circuit is used to amplify the detection electrical signal to obtain an amplified electrical signal; A filter circuit is connected to the gain amplifier circuit and is used to filter the amplified electrical signal to obtain a filtered electrical signal; An ADC module is connected to the filter circuit and is used to perform analog-to-digital conversion on the filtered electrical signal to obtain a conditioned electrical signal; A second FPGA module is connected to the ADC module and the second DDR cache module respectively, and is used to send the conditioned electrical signal to the second DDR cache module; The second DDR buffer module is used to buffer the conditioned electrical signal and send the conditioned electrical signal to the host computer.

8. The kilowatt-class high-power high-delay precision ultrasonic phased array excitation device according to claim 1 is characterized in that: The kilowatt-class high-power high-delay precision ultrasonic phased array excitation device also includes: The display module is connected to the host computer and is used to complete human-computer interaction and display test results.

9. A kilowatt-class high-power high-delay precision ultrasonic phased array excitation method, applied to the kilowatt-class high-power high-delay precision ultrasonic phased array excitation device according to any one of claims 1 to 8, characterized in that: The kilowatt-class high-power high-delay precision ultrasonic phased array excitation method comprises: The host computer sends working parameters to the multi-channel transmitting module; The multi-channel transmitting module sequentially excites each transmitting channel according to the preset working parameters, so that each transmitting channel generates a pulse excitation signal; at the same time, the channel delay measurement module measures the actual delay time between two adjacent transmitting channels; the two adjacent transmitting channels are two adjacent transmitting channels after all transmitting channels are sorted according to the excitation order; The transducer detects the component under test based on the pulse excitation signal generated by each transmitting channel, and obtains the detection electrical signal corresponding to each transmitting channel; The multi-channel receiving module performs signal conditioning on the detection electrical signals corresponding to each transmitting channel to obtain the conditioned electrical signals corresponding to each receiving channel; The host computer performs imaging based on the conditioned electrical signals corresponding to each receiving channel and the actual delay time between two adjacent transmitting channels to obtain the detection results.

Images