CN201418749Y - Pulse code emitting system for improving high-frequency ultrasound harmonic components - Google Patents
Pulse code emitting system for improving high-frequency ultrasound harmonic components Download PDFInfo
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- CN201418749Y CN201418749Y CN 200920096966 CN200920096966U CN201418749Y CN 201418749 Y CN201418749 Y CN 201418749Y CN 200920096966 CN200920096966 CN 200920096966 CN 200920096966 U CN200920096966 U CN 200920096966U CN 201418749 Y CN201418749 Y CN 201418749Y
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- pulse code
- harmonic components
- frequency ultrasound
- driving unit
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Abstract
The utility model discloses a pulse code emitting system for improving high-frequency ultrasound harmonic components, which comprises an energy converter, and a control unit, a primary driving unit, asecondary driving unit and a T/R change-over switch connected in sequence and in series, wherein the output end of the T/R change-over switch is connected with the energy converter; the control unitadopts a programmable and logic array chip; the primary driving unit adopts a MOSFET driver IC; and the secondary driving unit adopts a high-voltage MOSFET combined chip. Due to the combination of numeric coding and the phase delay combined technology, the broad band property of the energy converter can be effectively utilized, so that high quality ultrasonic signals with the needed high-frequencyharmonic components can be produced. The utility model can effectively improve the quality of high-frequency ultrasonic information, thereby further improving the high-frequency ultrasonic image quality.
Description
Technical field
This utility model relates to a kind of pulse code emission system.Particularly relate to and a kind ofly can effectively improve high frequency ultrasound harmonic information quality, thereby improve the pulse code emission system that is used to improve the high frequency ultrasound harmonic components of high frequency ultrasound image quality.
Background technology
One of the focus that medical high frequency ultrasound imaging is the ultra sonic imaging research field and difficult point.Owing to be subjected to the restriction of ultrasonic transducer technological level, the transducer of medical high frequency ultrasound imaging system (operating frequency is more than ten MHz) is mainly based on single array element at present.Since the material difference of high-frequency transducer, the processing technique difference, and its sensitivity of the transducer of different frequency is different with the frequency spectrums of operation width.The transducer groundwork frequency that is used for ophthalmology/B ultrasonic at present is 10MHz or 20MHz, and its investigation depth can reach optical fundus portion.And in the application of hyperfrequency ultrasound biomicroscopy UBM, the groundwork frequency of transducer is 35MHz and 50MHz, and its investigation depth can reach about 8mm, is mainly used in the diagnosis of organella pathological changes such as anterior ocular segment pathological changes or dermatosis.
How to effectively utilize the broadband character of transducer, making it can produce high-quality ultrasonic signal with required high-frequency harmonic composition is one of key of undergraduate course topic.Conventional impulse ultrasound wave generation circuit is to utilize High-tension Switch Devices to produce the high-voltage pulse pumping signal with certain width, imposes on ultrasonic transducer to produce required source signal.In high frequency ultrasound is used, because the switching characteristic of the existing High-tension Switch Devices that can be used for producing pulse ultrasonic wave is uncontrollable, and it is undesirable at high band, the switching characteristic that only relies on device itself produces the required high-frequency ultrasonic source signal that has than the narrow-band scope and is restricted, and also can influence the extraction of high-frequency harmonic information.
Summary of the invention
Technical problem to be solved in the utility model is the pulse code emission system that is used to improve the high frequency ultrasound harmonic components that provides a kind of transducer drive coupling that can satisfy different frequency, different spectral width to require.
The technical scheme that this utility model adopted is: a kind of pulse code emission system that is used to improve the high frequency ultrasound harmonic components, include transducer, also be provided with control unit, one-level driver element, secondary drive unit and the T/R permutator of polyphone connection successively, the outfan of described T/R permutator connects transducer.
Described control unit adopts the programmable logic array chip.
Described one-level driver element adopts MOSFET to drive chip.
Described secondary drive unit adopts the high-voltage MOSFET combined chip.
The pulse code emission system that is used to improve the high frequency ultrasound harmonic components of the present utility model, owing to the employing digital coding and in conjunction with the Phase delay combination technique, can effectively utilize the broadband character of transducer, make it can produce high-quality ultrasonic signal with required high-frequency harmonic composition.Thereby can effectively improve high frequency ultrasound harmonic information quality and improve the high frequency ultrasound image quality.
Description of drawings
Fig. 1 is that this utility model constitutes block diagram;
Fig. 2 is circuit theory diagrams of the present utility model.
Wherein:
1: control unit 2: the one-level driver element
3: secondary drive unit 4:T/R permutator
5: transducer
The specific embodiment
Below in conjunction with the embodiment accompanying drawing pulse code emission system that is used to improve the high frequency ultrasound harmonic components of the present utility model is made a detailed description.
As shown in Figure 1, the pulse code emission system that is used to improve the high frequency ultrasound harmonic components of the present utility model, include transducer 5, also be provided with control unit 1, one-level driver element 2, secondary drive unit 3 and the T/R permutator 4 of polyphone connection successively, the outfan of described T/R permutator 4 connects transducer 5.
Described control unit 1 adopts programmable logic array chip (FPGA) establishment launching code sequence set.Launching code width provides benchmark according to the frequency characteristic of ultrasonic transducer 5 by the FPGA clock, realizes the required cycle by logical combination.Phase place between the different coding sequence realizes postponing control by the built-in phaselocked loop of FPGA, what postpones drive chip and high-voltage MOSFET combined chip switching characteristic and the decision of required emitted pulse spectrum amount trimmed according to MOSFET.The number of output encoder sequence and pattern can be prefabricated.By FPGA output launching code sequence set, drive chip in order to driven MOS FET.
Described one-level driver element 2 adopts MOSFET (field-effect transistor) to drive chip; Described secondary drive unit 3 adopts the high-voltage MOSFET combined chip.MOSFET drives chip provides driving high-voltage MOSFET combined chip required voltage and current.After driving chip output, drive the high-voltage MOSFET combined chip producing required high-voltage pulse signal, and then drive ultrasonic transducer.
The pulse code emission system that is used to improve the high frequency ultrasound harmonic components of the present utility model adopts digital coding and in conjunction with the Phase delay combination technique, can control pumping signal spectrum width and composition.In conjunction with the characteristic of broadband transducer, produce ultrasound wave with required high-frequency harmonic bandwidth.Wherein: programmable logic array, it provides coded pulse according to different transducers for system, and different coded sequences adopts different time delays combinations, in order to improve the high frequency spectrum composition.
This coded pulse drives the high-voltage MOSFET pipe by mosfet driver.By different coded signal combinations, can produce the high-frequency and high-voltage that is complementary with transducer and drive signal, make transducer send the ultrasound source signal of required operating frequency.The T/R permutator is used to isolate radiating circuit and receiving circuit.
As shown in Figure 2, the pulse code emission system that is used for improving the high frequency ultrasound harmonic components of the present utility model, adopted the EP 1C20 chip of the Cyclone of altera corp series as the programmable logic array chip (FPGA) of control unit 1, establishment launching code sequence set.MOSFET as one-level driver element 2 drives chip employing EL7104.High-voltage MOSFET combined chip as secondary drive unit 3 adopts N-channel MOS FET pipe and the combination of P channel mosfet pipe.T/R permutator 4 is two diodes.
Utilize spectrum analyzer to analyze to transmitting through the high-voltage pulse that is used to improve the pulse code emission system output of high frequency ultrasound harmonic components of the present utility model, the result shows: exomonental width can be effectively regulated in Phase delay control, and pulse code is transmitted in the effect that improves transmitted pulse and echo spectrum composition aspect.Be specially adapted to high frequency ultrasound harmonic imaging system.
Claims (4)
1. pulse code emission system that is used to improve the high frequency ultrasound harmonic components, include transducer (5), it is characterized in that, also be provided with control unit (1), one-level driver element (2), secondary drive unit (3) and the T/R permutator (4) of polyphone connection successively, the outfan of described T/R permutator (4) connects transducer (5).
2. the pulse code emission system that is used to improve the high frequency ultrasound harmonic components according to claim 1 is characterized in that, described control unit (1) adopts the programmable logic array chip.
3. the pulse code emission system that is used to improve the high frequency ultrasound harmonic components according to claim 1 is characterized in that, described one-level driver element (2) adopts MOSFET to drive chip.
4. the pulse code emission system that is used to improve the high frequency ultrasound harmonic components according to claim 1 is characterized in that, described secondary drive unit (3) adopts the high-voltage MOSFET combined chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920096966 CN201418749Y (en) | 2009-06-02 | 2009-06-02 | Pulse code emitting system for improving high-frequency ultrasound harmonic components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920096966 CN201418749Y (en) | 2009-06-02 | 2009-06-02 | Pulse code emitting system for improving high-frequency ultrasound harmonic components |
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| Publication Number | Publication Date |
|---|---|
| CN201418749Y true CN201418749Y (en) | 2010-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200920096966 Expired - Fee Related CN201418749Y (en) | 2009-06-02 | 2009-06-02 | Pulse code emitting system for improving high-frequency ultrasound harmonic components |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103854A (en) * | 2010-12-28 | 2011-06-22 | 电子科技大学 | Energy converter transceiver circuit of ultrasonic aerovane |
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2009
- 2009-06-02 CN CN 200920096966 patent/CN201418749Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103854A (en) * | 2010-12-28 | 2011-06-22 | 电子科技大学 | Energy converter transceiver circuit of ultrasonic aerovane |
| CN102103854B (en) * | 2010-12-28 | 2013-04-03 | 电子科技大学 | Energy converter transceiver circuit of ultrasonic aerovane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100310 Termination date: 20100602 |