CN214104459U - Ultrasonic probe for measuring diameter of urinary catheter - Google Patents
Ultrasonic probe for measuring diameter of urinary catheter Download PDFInfo
- Publication number
- CN214104459U CN214104459U CN202022281398.4U CN202022281398U CN214104459U CN 214104459 U CN214104459 U CN 214104459U CN 202022281398 U CN202022281398 U CN 202022281398U CN 214104459 U CN214104459 U CN 214104459U
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- China
- Prior art keywords
- electrode
- shell
- piezoelectric crystal
- upper electrode
- backing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000000523 sample Substances 0.000 title claims abstract description 28
- 230000002485 urinary effect Effects 0.000 title claims description 8
- 239000013078 crystal Substances 0.000 claims abstract description 35
- 239000011358 absorbing material Substances 0.000 claims abstract description 7
- 239000011241 protective layer Substances 0.000 claims description 13
- 239000010410 layer Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 abstract description 23
- 238000010521 absorption reaction Methods 0.000 abstract description 18
- 238000013016 damping Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- 210000000626 ureter Anatomy 0.000 abstract description 4
- 239000000843 powder Substances 0.000 description 6
- 238000002604 ultrasonography Methods 0.000 description 6
- 230000005284 excitation Effects 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Ultra Sonic Daignosis Equipment (AREA)
Abstract
The utility model provides a ureter diameter measurement supersound probe, including shell, electrode line, upper electrode, bottom electrode, piezoelectric crystal, the shell is hollow cylinder form, upper electrode, bottom electrode and piezoelectric crystal set up in the shell, piezoelectric crystal's upper and lower surface is connected respectively upper electrode and bottom electrode, the shell includes the acoustics insulating layer, the electrode line passes the upper end of shell and with upper electrode electric connection, the shell intussuseption is filled with the backing sound absorbing material. Special backing sound absorption materials are placed behind the piezoelectric crystal, and the sound absorption characteristics of the backing sound absorption materials are utilized to generate damping, so that the ringing reaction is weakened, and the total pulse length is shortened. At the same time, the backing sound absorbing material can also absorb sound energy emitted behind the piezoelectric crystal, otherwise the energy can generate reflection in the crystal to interfere with echo from the detected medium.
Description
Technical Field
The utility model belongs to the technical field of the probe, especially, relate to a ureter diameter measurement supersound probe.
Background
As a probe applied to the structure of an ultrasonic diagnostic apparatus in the medical field, an intracorporeal insertion type ultrasonic probe is known, which performs ultrasonic scanning in the body by inserting an ultrasonic transducer into a body cavity of an object to be examined. The length of the vibration time of the ultrasonic probe after being electrically excited affects the longitudinal resolution of the ultrasonic system. In order to achieve good longitudinal resolution, the excitation electrical pulse width is usually as narrow as possible, however, since the piezoelectric material of the ultrasound probe usually responds to the electrical excitation for a long time (i.e. the acoustic oscillation is maintained in a damped oscillation manner for a while after the electrical pulse is over), the ringing response generates a long ultrasound pulse, and if the ringing is not damped, the resolution is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem and providing a ureter diameter measurement ultrasonic probe.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a ureter diameter measurement supersound probe, includes shell, electrode line, upper electrode, bottom electrode, piezoelectric crystal, the shell is hollow cylinder form, upper electrode, bottom electrode and piezoelectric crystal set up in the shell, piezoelectric crystal's upper and lower surface is connected respectively upper electrode and bottom electrode, the shell includes the acoustics insulating layer, the electrode line passes the upper end of shell and with upper electrode electrical connection, the shell intussuseption is filled with the backing sound absorbing material.
Preferably, the backing sound absorption material is epoxy resin and tungsten powder.
Preferably, the sound absorption material of the liner is ferrite powder and rubber powder.
Preferably, the lower end of the shell is provided with a protective layer.
Preferably, the front end surface of the protective layer is arc-shaped.
Preferably, an acoustic matching layer is disposed between the lower electrode and the housing.
After the technical scheme is adopted, the utility model has the advantages of as follows:
special backing sound absorption materials are placed behind the piezoelectric crystal, and the sound absorption characteristics of the backing sound absorption materials are utilized to generate damping, so that the ringing reaction is weakened, and the total pulse length is shortened. At the same time, the backing sound absorbing material can also absorb sound energy emitted behind the piezoelectric crystal, otherwise the energy can generate reflection in the crystal to interfere with echo from the detected medium. The cushion sound absorption material with strong damping shortens the sound pulse time of the ultrasonic probe, but also reduces the sensitivity; the weak damping impairs the resolution, but makes the ultrasound probe have better sensitivity.
Drawings
Fig. 1 is a schematic structural view of an ultrasonic probe for measuring the diameter of a urinary catheter according to the present invention;
in the figure:
1-a housing; 101-an acoustic insulation layer; 2-electrode wires; 3-an upper electrode; 4-a lower electrode; 5-a piezoelectric crystal; 6-acoustic matching layer; 7-backing sound absorbing material; 8-protective layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the ultrasonic probe for measuring the diameter of the urinary catheter comprises a shell 1, an electrode wire 2, an upper electrode 3, a lower electrode 4 and a piezoelectric crystal 5. The shell 1 is in a hollow cylinder shape. The upper electrode 3, the lower electrode 4 and the piezoelectric crystal 5 are arranged in the housing 1. The upper surface and the lower surface of the piezoelectric crystal 5 are respectively connected with the upper electrode 3 and the lower electrode 4. An acoustic matching layer 6 is arranged between the lower electrode 4 and the shell 1. The housing 1 comprises an acoustically insulating layer 101. The electrode wire 2 penetrates through the upper end of the housing 1 and is electrically connected with the upper electrode 3. The casing 1 is filled with a backing sound absorption material 7. The backing sound absorption material 7 is epoxy resin and tungsten powder; or the backing sound absorption material 7 is ferrite powder and rubber powder. The lower end of the shell 1 is provided with a protective layer 8. The front end face of the protective layer 8 is arc-shaped.
The piezoelectric crystal is used for receiving electric pulses to generate mechanical ultrasonic vibration so as to complete the sound-electricity and electricity-sound conversion work. The geometric shape and size are designed according to the diagnosis requirement, and a lead is respectively welded on the upper electrode and the lower electrode and is used for transmitting electric signals; the backing sound absorption material is used for attenuating and absorbing ultrasonic energy radiated by the piezoelectric vibrator back to the outside, so that the ultrasonic energy is not reflected back and forth in the probe, and the ringing time of the vibrator is prolonged, therefore, the backing has higher attenuation capacity and has acoustic impedance close to that of the piezoelectric material, so that the sound wave radiated by the piezoelectric vibrator back to the outside completely enters the backing and is not reflected back to the vibrator, and the sound absorption material is generally formed by matching epoxy resin and tungsten powder or ferrite powder and rubber powder; the acoustic insulating layer is used for preventing ultrasonic energy from being transmitted to the probe shell to cause reflection, so that interference on signals is caused; the shell is used as a supporting body of the internal material of the probe and is used for fixing a cable lead, and the model and the nominal frequency of the probe are usually marked on the shell; the protective layer is used for protecting the vibrator from being abraded. The protective layer should be made of a material with low attenuation coefficient and wear resistance, the acoustic impedance of the protective layer should be close to the acoustic impedance of human tissue due to the fact that the protective layer is in contact with the vibrator and the human tissue at the same time, the protective layer is also used as an acoustic impedance gradual change layer inserted between layers, and the thickness of the protective layer should be lambda/4.
The characteristic frequency of the probe is determined by the thickness of the piezoelectric crystal. When the piezoelectric crystal is electrically excited, sound energy is emitted from both the front and back surfaces, and as long as the acoustic impedance of the surrounding medium is different from that of the piezoelectric crystal, part of the sound energy is reflected back to the crystal at the front and back interfaces and propagates at the same speed in the crystal as sound waves. The time required for the sound wave to reach the opposite surface is proportional to the thickness of the crystal, when the thickness of the crystal is just half of the wavelength, the reflection stress and the emission stress are mutually strengthened on each surface, and the piezoelectric crystal generates resonance and presents the maximum displacement amplitude. The frequency corresponding to half wavelength thickness is called the fundamental resonance frequency of the piezoelectric crystal. When the crystal thickness is equal to the wavelength, the stresses on each side are exactly opposite and the displacement amplitude is minimal. Since the thickness of a half-wavelength crystal at any frequency is determined by the speed of sound in the crystal material, the half-wavelength thickness of each piezoelectric material must be calculated specifically, i.e., the half-wavelength thicknesses of different piezoelectric materials are not the same. Since the wavelength is inversely proportional to the frequency, the thickness of the piezoelectric element is inversely proportional to the frequency of generation.
The length of the vibration time of the ultrasonic probe after being electrically excited affects the longitudinal resolution of the ultrasonic system. In order to achieve good longitudinal resolution, the excitation electrical pulse width is usually as narrow as possible, however, since the piezoelectric material of the ultrasound probe usually responds to the electrical excitation for a long time (i.e. the acoustic oscillation is maintained in a damped oscillation manner for a while after the electrical pulse is over), the ringing response generates a long ultrasound pulse, and if the ringing is not damped, the resolution is reduced. Special backing sound absorption materials are placed behind the piezoelectric crystal, and the sound absorption characteristics of the backing sound absorption materials are utilized to generate damping, so that the ringing reaction is weakened, and the total pulse length is shortened. At the same time, the backing sound absorbing material can also absorb sound energy emitted behind the piezoelectric crystal, otherwise the energy can generate reflection in the crystal to interfere with echo from the detected medium. The cushion sound absorption material with strong damping shortens the sound pulse time of the ultrasonic probe, but also reduces the sensitivity; the weak damping impairs the resolution, but makes the ultrasound probe have better sensitivity.
In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022281398.4U CN214104459U (en) | 2020-10-14 | 2020-10-14 | Ultrasonic probe for measuring diameter of urinary catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022281398.4U CN214104459U (en) | 2020-10-14 | 2020-10-14 | Ultrasonic probe for measuring diameter of urinary catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214104459U true CN214104459U (en) | 2021-09-03 |
Family
ID=77498448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022281398.4U Expired - Fee Related CN214104459U (en) | 2020-10-14 | 2020-10-14 | Ultrasonic probe for measuring diameter of urinary catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214104459U (en) |
-
2020
- 2020-10-14 CN CN202022281398.4U patent/CN214104459U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210903 |