Electromagnetic ultrasonic phased array energy converter
An electromagnetic ultrasonic and phased array technology, applied in instruments, material analysis using sound waves/ultrasonic waves/infrasonic waves, scientific instruments, etc., can solve problems such as low detection efficiency and complicated operation, and achieve reduced interference, reduced volume, and convenient detection and imaging effects
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specific Embodiment approach 1
[0036] Specific implementation mode one: combine figure 1 To illustrate this embodiment, an electromagnetic ultrasonic phased array transducer described in this embodiment includes a permanent magnet 1, a multi-channel coil 3, a shielded wire 4 and a plug 5;
[0037] The multi-channel coil 3 is fixed under the permanent magnet 1;
[0038] One end of the shielding wire 4 is connected to the multi-channel coil 3 , and the other end of the shielding wire 4 is connected to the plug 5 .
[0039] In this embodiment, multi-channel coils 3 share one permanent magnet 1, which greatly reduces the volume of the transducer, and reduces the interference of magnet echoes to received echoes. Therefore, an electromagnetic ultrasonic phase control described in this embodiment The array transducer is simple in structure and small in size, and can realize the phase control sound beam control function, which is convenient for defect detection and imaging.
specific Embodiment approach 2
[0040] Embodiment 2: This embodiment further defines the electromagnetic ultrasonic phased array transducer described in Embodiment 1. In this embodiment, the multi-channel coil 3 is composed of multiple single coils;
[0041] Each single coil acts as an element of the phased array;
[0042] One end of each single coil is connected to the plug 5; the other end of each single coil is connected together and connected to the ground wire.
[0043] In this embodiment, in order to verify the effectiveness of using a single coil as an array element of a phased array, a sound field distribution simulation model of an eight-array element electromagnetic ultrasonic phased array transducer composed of a single coil is established; as figure 2 As shown, the propagation of the 30° deflected sound beam of the electromagnetic ultrasonic phased array transducer after the signal is excited for 10 μs. The simulation results show that the transducer can realize the sound beam phase control func...
specific Embodiment approach 3
[0044] Specific embodiment three: This embodiment is to further limit the electromagnetic ultrasonic phased array transducer described in specific embodiment one. In this embodiment, the multi-channel coil 3 is divided into two types: PCB coil and hand-wound coil. form.
[0045] In this embodiment, the signal of the PCB coil is relatively weak, but the control precision of the array element width parameter and spacing parameter is high; the control accuracy of the array element width parameter and spacing parameter of the hand-wound coil is relatively low, but the signal is strong.
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