Ultrasonic device based on dynamic adjustment of emission frequency

Abstract

The utility model belongs to the field of B-type diasonometers, and particularly relates to an ultrasonic device based on dynamic adjustment of emission frequency, which comprises a central processor ARM, a hardware processor FPGA, a variable-frequency high-voltage pulse generation unit and a data acquisition unit. Wherein the hardware processor FPGA comprises a control command module, a variable frequency pulse generation module and a high and low frequency echo signal fusion module. According to the device, corresponding scanning data are obtained by controlling and transmitting variable-frequency pulses, high-frequency pulses can obtain better near-field image resolution, low-frequency pulses can detect deeper far-field images, and imaging quality and detection depth can be considered by dynamically adjusting the frequency of ultrasonic waves. The defects that the low-frequency near-field imaging effect is not ideal and the high-frequency far-field detection depth is not enough under the single frequency are well overcome.

Description

Technical Field

[0001] The utility model belongs to the field of B-type ultrasonic diagnostic instruments, and in particular relates to an ultrasonic device based on dynamically adjusting the transmitting frequency. Background Art

[0002] Frequency characteristics of ultrasound: The resolution of ultrasound is directly proportional to its frequency. Higher frequencies can provide higher resolution. The penetration of ultrasound is inversely proportional to the frequency, that is, the higher the frequency, the lower the penetration. The higher the frequency, the easier it is to be absorbed. High-frequency ultrasound will lose more energy in the tissue, so it cannot penetrate deep into the tissue, while low-frequency ultrasound has better penetration.

[0003] The working principle of the existing B-mode ultrasound diagnostic instrument is that the probe emits ultrasonic pulses of a fixed frequency, then collects echo data, then performs beam synthesis, and then generates a B-mode ultrasound image after data processing and digital scan conversion. The same detection frequency is used during B-mode ultrasound imaging, and the probe emission frequency can generally only be switched manually through the button on the interface to observe the near-field image or the far-field image. The near-field image quality and the far-field detection depth cannot be taken into account at the same frequency. Utility Model Content

[0004] In view of the shortcomings of the prior art, an ultrasonic device based on dynamically adjusting the transmitting frequency is provided, which achieves both near-field high resolution and far-field detection depth by changing the transmitting frequency of the probe.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An ultrasonic device based on dynamically adjusting the transmission frequency comprises a central processing unit ARM, a hardware processor FPGA, a variable frequency high-voltage pulse generating unit, and a data acquisition unit, wherein the hardware processor FPGA comprises a control command module, a variable frequency pulse generating module, and a high- and low-frequency echo signal fusion module; the central processing unit ARM is electrically connected to the control command module of the hardware processor FPGA, the variable frequency pulse generating module of the hardware processor FPGA is electrically connected to the variable frequency high-voltage pulse generating unit, the variable frequency high-voltage pulse generating unit is electrically connected to a wide-band probe, the wide-band probe is electrically connected to the data acquisition unit, and the data acquisition unit is electrically connected to the high- and low-frequency echo signal fusion module of the hardware processor FPGA.

[0007] Furthermore, the differential signal end of the variable frequency high voltage pulse generating unit is electrically connected to the variable frequency pulse generating module of the FPGA; its variable frequency high voltage pulse signal end is electrically connected to the broadband probe; and its echo signal end is electrically connected to the data acquisition unit.

[0008] Furthermore, the ultrasound device also includes an echo signal acquisition unit, which receives the echo signal of the broadband probe and transmits it to the data acquisition unit.

[0009] Furthermore, the variable frequency high voltage pulse generating unit is integrated with the echo signal acquiring unit.

[0010] Furthermore, the ultrasound device also includes a display, which is electrically connected to the high- and low-frequency echo signal fusion module of the hardware processor FPGA.

[0011] The utility model device acquires corresponding scanning data by controlling the emission of variable frequency pulses. High-frequency pulses can obtain better near-field image resolution, low-frequency pulses can detect deeper far-field images, and dynamic adjustment of the frequency of ultrasound can take into account both imaging quality and detection depth, thus overcoming the shortcomings of unsatisfactory low-frequency near-field imaging effect under a single frequency and insufficient high-frequency far-field detection depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a principle block diagram of the utility model invention;

[0013] Figure 2 This is the circuit schematic diagram of the variable frequency high voltage pulse generation and echo signal acquisition unit. DETAILED DESCRIPTION

[0014] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, the embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on the embodiments are all within the protection scope of the present invention.

[0015] like Figure 1 As shown, an ultrasonic device based on dynamically adjusting the transmission frequency achieves both near-field high resolution and far-field detection depth by changing the probe transmission frequency through high- and low-frequency high-voltage pulses. It includes a central processor ARM, a hardware processor FPGA, a variable-frequency high-voltage pulse generating unit, a data acquisition unit and a display.

[0016] The central processor ARM uses the STM32F407ZET6TR chip, which is used to control the normal operation of the entire system, transmit commands, and human-computer interaction.

[0017] The hardware processor FPGA uses the PGL25G-6FBG256 chip of Tsinghua Tongchuang Company, receives the command of ARM, and performs corresponding operations. The variable frequency pulse generation module generates high and low frequency digital pulses respectively and sends them to the next level module. The high and low frequency echo signals are processed by the high and low frequency echo signal fusion module and then data fused to form the final scan line, which is finally converted into an image through digital scanning and sent to the display.

[0018] The variable frequency high voltage pulse generation unit uses the HDL6V5584 chip, which generates high and low frequency high voltage pulses by receiving the high and low frequency digital pulse signals of the variable frequency pulse generation module and transmits them to the broadband probe.

[0019] The data acquisition unit uses AD9278 chip from AD Company. The data acquisition unit samples the echo signal of the broadband probe, and then sends it to FPGA for post-processing to finally form an image.

[0020] In addition, the HDL6V5584 chip of the variable frequency high voltage pulse generating unit is integrated with the echo signal acquiring unit, and the echo signal of the broadband probe is received by the echo signal acquiring unit and transmitted to the data acquisition unit.

[0021] A broadband probe is a transducer device used in ultrasound imaging that has the ability to send and receive ultrasound signals in multiple frequency ranges, providing a wider frequency coverage, thereby providing more details and higher resolution during imaging.

[0022] The central processing unit ARM is electrically connected to the control command module of the hardware processor FPGA to perform signal control on the FPGA; the variable frequency pulse generating module of the hardware processor FPGA sends high and low frequency digital pulse signals according to the control signal of the central processing unit ARM, and is electrically connected to the variable frequency high voltage pulse generating unit; the variable frequency high voltage pulse generating unit is electrically connected to the wideband probe to generate high and low frequency high voltage pulses and transmit them to the wideband probe; the wideband probe sends ultrasonic signals and receives echo signals; the echo signals received by the wideband probe are electrically transmitted to the data acquisition unit for analog-to-digital conversion; the data acquisition unit is electrically connected to the high and low frequency echo signal fusion module of the hardware processor FPGA, and the high and low frequency echo signal fusion module receives the digital signal of the data acquisition unit to fuse the high and low frequency echo signal data to form the final scan line, which is finally converted into an image through digital scanning and sent to the display.

[0023] The HDL6V5584 chip integrates an echo signal acquisition unit, the broadband probe is electrically connected to the echo signal acquisition unit, the echo signal acquisition unit is electrically connected to the data acquisition unit, and the echo signal acquisition unit receives the echo signal of the broadband probe and transmits it to the data acquisition unit.

[0024] like Figure 2 As shown, Pin1 / Nin1-Pin8 / Nin8 of the variable frequency high voltage pulse generating chip are 8 groups of differential signal terminals, which are electrically connected to the variable frequency pulse generating module of the FPGA to receive variable frequency pulse digital signals; its HVout1-HVout8 are variable frequency high voltage pulse signal terminals, which are electrically connected to the broadband probe; its LVout1-LVout8 are echo signal terminals, which are electrically connected to the data acquisition unit.

[0025] The ultrasonic device of the utility model emits a high-frequency pulse to obtain a scan line data. When other conditions remain unchanged, a low-frequency pulse is then emitted to obtain a scan line. After the two scan lines are subjected to independent low-pass filtering, dynamic filtering and other signal processing, the two scan lines are fused into one scan line data. The scan line contains both near-field high-frequency echo signals and far-field low-frequency signals. After all scan lines are completed, an ultrasonic image is formed after digital scanning conversion. In this way, the entire image takes into account the resolution of the near-field image and the scanning depth of the far-field image. In order to take into account both the imaging quality and the detection depth, the frequency of the ultrasonic wave is dynamically adjusted, and multiple frequency pulses can be emitted according to the needs. The method is similar to obtain better image quality and depth. When high-resolution near-field imaging is required, a higher frequency ultrasonic wave can be selected. When a deeper detection depth is required, a lower frequency ultrasonic wave can be selected.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. An ultrasonic device based on dynamically adjusting the transmission frequency, characterized in that: It includes a central processing unit ARM, a hardware processor FPGA, a variable frequency high-voltage pulse generating unit, and a data acquisition unit, wherein the hardware processor FPGA includes a control command module, a variable frequency pulse generating module, and a high- and low-frequency echo signal fusion module; the central processing unit ARM is electrically connected to the control command module of the hardware processor FPGA, the variable frequency pulse generating module of the hardware processor FPGA is electrically connected to the variable frequency high-voltage pulse generating unit, the variable frequency high-voltage pulse generating unit is electrically connected to a wide-band probe, the wide-band probe is electrically connected to the data acquisition unit, and the data acquisition unit is electrically connected to the high- and low-frequency echo signal fusion module of the hardware processor FPGA.

2. An ultrasonic device based on dynamically adjusting the transmission frequency according to claim 1, characterized in that: The differential signal end of the variable frequency high voltage pulse generating unit is electrically connected to the variable frequency pulse generating module of the FPGA; and the variable frequency high voltage pulse signal end thereof is electrically connected to the broadband probe; Its echo signal end is electrically connected to the data acquisition unit.

3. The ultrasonic device based on dynamically adjusting the transmission frequency according to claim 1, characterized in that: The ultrasonic device further comprises an echo signal acquisition unit, which receives the echo signal of the broadband probe and transmits it to the data acquisition unit.

4. The ultrasonic device based on dynamically adjusting the transmission frequency according to claim 3, characterized in that: The variable frequency high voltage pulse generating unit is integrated with the echo signal acquiring unit.

5. An ultrasonic device based on dynamically adjusting the transmission frequency according to any one of claims 1 to 4, characterized in that: The ultrasound device also includes a display, which is electrically connected to the high- and low-frequency echo signal fusion module of the hardware processor FPGA.

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