CN2315567Y - New supersonic Doppler blood flow detector - Google Patents
New supersonic Doppler blood flow detector Download PDFInfo
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- CN2315567Y CN2315567Y CN 98202128 CN98202128U CN2315567Y CN 2315567 Y CN2315567 Y CN 2315567Y CN 98202128 CN98202128 CN 98202128 CN 98202128 U CN98202128 U CN 98202128U CN 2315567 Y CN2315567 Y CN 2315567Y
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- 238000004458 analytical method Methods 0.000 description 4
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Abstract
The utility model relates to a novel new supersonic Doppler blood flow detector, which is composed of a transducer, a transmitting circuit, an analog signal detection circuit, a high speed signal processing card, and a controlling circuit. After echo signal received by the transducer is processed via the analog signal detection circuit, analog-to-digital conversion is carried out. The digital signals after conversion is sent to the high speed signal processing card, are carried out wave filtering, forward and reverse blood flow separation, and spectrum analysis in sequence. Parameters such as maximum rate, minimum flow rate, average flow rate, pulsating index, resistant index, etc. can be obtained from a spectrogram. The parameter can be directly used for the diagnosis of clinical desease.
Description
The utility model relates to a kind of novel ultrasonic doppler blood flow measuring instrument, belongs to the physical measurement techniques field.
Cardiovascular and cerebrovascular disease is one of principal disease that jeopardizes at present human health.Can be used for not having the blood flow of wound ground human body based on the supersonic blood measuring instrument of Doppler's principle design, thereby provide strong instrument for the diagnosis of cardiovascular and cerebrovascular disease.
The principle that ultrasonic doppler blood flow is measured:
Run into the object of motion after ultrasound wave enters human body, the Doppler frequency deviation (see figure 1) will appear in its echoed signal, and the size of frequency deviation is determined by following formula:
In the formula, f
oIt is transmission frequency; f
dIt is Doppler frequency deviation; V is the speed of object of which movement; C is that the ultrasonic speed of propagating in human body: θ is the angle, centre between acoustic beam and the flow velocity.
Continuous when sinusoidal wave when emission, system is called continuous wave blood flow measurement instrument: system is called pulsating wave blood flow measurement instrument when short burst that emission repeats.
Fig. 2 is the synoptic diagram of pulsating wave blood flow measurement instrument principle of work.
After-applied to transducer by the emission short pulse signal group that control circuit produces through radiating circuit, convert ultrasonic signal thus to and enter human body.Echoed signal (f by motor tissue generation in the human body
o+ f
d), send into demodulator circuit through amplifying.Demodulator circuit is again with detected signal (f
d) deliver to the range gating circuit, by the sampled signal that control circuit sends the echoed signal of designated depth is sampled.At last, calculate corresponding spectrogram through after the Filtering Processing by spectralyzer.
From the system design aspect, adopted a large amount of mimic channels in the prior art, just in the end a link has just used digital signal processor or computing machine to finish analysis of spectrum, as shown in Figure 3.There is following problem in such system: interference noise is big, matching device difficulty, debug process complexity, processing charges height.
On the technical scheme that adopts when functional module realizes, the problem that prior art exists is:
(1) used in the control circuit many in, small-scale assembly.Make that not only the control panel area is big, the processing charges height, and increased many insecure factors.
(2) in the simulation amplification channel, use discrete component.Though also can meet the requirements of gain and bandwidth, can not realize the ON/OFF control and the gain control of amplifier.
The purpose of this utility model is a kind of novel ultrasonic multispectral blood flow measurement instrument of reining in of design, simplifies circuit design, improves the integrated level of measuring system, and improves reliability, dirigibility and the confidentiality of system.
The ultrasonic multispectral blood flow measurement instrument of reining in of the utility model design, comprise transducer and
(1) radiating circuit: is made up of two triodes, two VMOS pipe and a transformer, the transponder pulse signal (RX, RXN) of two complementations that produced by system, control circuit is given two triodes respectively, manages through control VMOS after the level conversion.Two VMOS pipe alternate conduction, formed transponder pulse is through transformer coupled to the transducer wafer;
(2) analog signal detection circuit:
The analog signal detection circuit is made of radio frequency amplifier, detuner and range gating circuit, that wherein radio frequency amplifier is selected for use is the operational amplifier A D600 of a slice low noise, broadband, variable gain, the GAT end is the ON/OFF control signal of amplifier, CH is the Amplifier Gain control signal, the simulating signal that is received by transducer is coupled to AD600 through inductance (L), electric capacity (C), send detuner after the amplification again; What detuner adopted is the MC1496 multiplier, and wherein SIN is a local oscillation signal, and echo is a ultrasound echo signal, and the radio frequency amplified analog signal converts single-ended output signal to through amplifier NE5534 then and gives distance choosing energy circuit through the multiplier demodulation; The range gating circuit is made up of integrator and sampling holder, comprising an amplifier (NE5534) and two switches, INTEGER and S/H are respectively the control signal of integral time and sampling retention time, and the high speed signal transaction card is sent in the output of range gating circuit again;
(3) high speed signal transaction card
The high speed signal processing element that adopts in the present embodiment is to be the signal processing card of basic engineering with TMS320C30;
(4) control circuit:
The input that control circuit produces following control signal: pulse repetition rate PRF, transponder pulse RX, sampling volume RGATE, orthogonal signal SIN and COS, radio frequency amplifier ON/OFF control signal RW and range gating signal INTEGER, S/H control circuit is the address wire of computing machine, data line and control line, at any time change above-mentioned each control signal concrete form by computing machine, the logical circuit of total system, control with a scale programmable logic device (EPLD), this device can online programming, the hack program.Circuit design has not only been simplified in quoting of it greatly, has improved the integrated level of system, but also the high reliability of system, dirigibility and confidentiality.
The ultrasonic doppler blood flow measuring instrument of the utility model design, echoed signal with the transducer reception, after analog signal detection circuit (comprising radio frequency amplifier, demodulator circuit, range gating circuit etc.) is handled, without filtering circuit filtering, just carry out mould/number conversion, digital signal after will changing is then sent into the high speed signal transaction card, does filtering, forward and reverse flow point again from reaching analysis of spectrum etc., as shown in Figure 4.Its outstanding feature is, radio frequency amplifier has adopted the radio frequency operational amplifier A D600 of low noise, broadband, controllable gain.This device low noise, wide band characteristic have satisfied the requirement that ultrasound echo signal amplifies fully.Meanwhile, this class A amplifier A is stated ON/OFF control and the Amplifier Gain control that duty is provided.Because in the pulsed wave ultrasound doppler system, emission is used same transducer with reception, therefore wishes amplifier cuts out in the emission cycle, only just it is opened at receiving cycle.In addition, when handling ultrasound echo signal, wish that by the echoed signal of different depth different enlargement factors is arranged.Therefore, the controllable gain operational amplifier can ideally solve the control requirement in the ultrasound echo signal processing.
The digital signal processing part, having adopted the TMS320C30 that produces with American TI Company is the high speed signal transaction card that the basis constitutes, comprising the signal after two-way A/D and the D/A transducer analog signal processing, become digital signal through A/D, in the high speed signal transaction card, can realize filtering, the separation of forward and reverse blood flow rate and analysis of spectrum etc. easily.
Another advantage of this measuring instrument is that the logical circuit of total system has only been used a slice scale programmable logic device (EPLD).This device can online programming, the hack program.Circuit design has not only been simplified in quoting of it greatly, has improved the integrated level of system, but also has improved reliability, dirigibility and the confidentiality of system.
Description of drawings:
Fig. 1 is ultrasonic doppler blood flow measuring principle figure.
Fig. 2 is a prior art pulse Doppler blood flow measurement instrument fundamental diagram.
Fig. 3 is that prior art is implemented theory diagram.
Fig. 4 is the pulse Doppler blood flow measurement instrument fundamental diagram of the utility model design.
Fig. 5 is an enforcement theory diagram of the present utility model.
Fig. 6 is the radiating circuit schematic diagram.
Fig. 7 is the radio frequency amplifier basic circuit diagram.
Fig. 8 is the demodulator circuit schematic diagram.
Fig. 9 is the range gating circuit theory diagrams.
Figure 10 is the input/output signal of control circuit.
Figure 11 is the programming device pinouts.
Figure 12 is the sequential relationship between each signal of control circuit.
Below in conjunction with accompanying drawing, introduce content of the present utility model in detail.
Among Fig. 1 to Fig. 7, the 1st, f transmits
o, the 2nd, skin, the 3rd, blood vessel, the 4th, received signal f
o+ f
d, the 5th, ultrasonic transducer.
Figure 5 shows that an embodiment of the present utility model.
This system is based upon on a common computer (PC) hardware platform, by the coordinated operation of each parts of PC engine control system.Total system partly is made up of radiating circuit, analog signal detection circuit, high speed signal transaction card and control circuit etc.The principle of work division of each several part is as follows:
(1) radiating circuit, as shown in Figure 6.
Radiating circuit is made up of two triodes, two VMOS pipes and a transformer.The transponder pulse signal (RX, RXN) of two complementations that produced by system, control circuit is given two triodes respectively, through control VMOS pipe after the level conversion.Two VMOS pipe alternate conduction, formed transponder pulse is through transformer coupled to the transducer wafer.
(2) analog signal detection circuit:
The analog signal detection circuit is made of radio frequency amplifier, detuner and range gating circuit.That wherein radio frequency amplifier is selected for use is the operational amplifier A D600 of a slice low noise, broadband, variable gain.The GAT end is the ON/OFF control signal of amplifier, and CH is the Amplifier Gain control signal, and the simulating signal that is received by transducer is delivered to AD600 through inductance (L), electric capacity (C) coupling as shown in Figure 7, send detuner after the amplification again.What detuner adopted is the MC1496 multiplier, and wherein SIN is a local oscillation signal, and echo is a ultrasound echo signal.The radio frequency amplified analog signal is through the multiplier demodulation, convert single-ended output signal to through amplifier NE5534 then and give the range gating circuit, as shown in Figure 8: the range gating circuit is made up of integrator and sampling holder, comprising an amplifier (NE5534) and two switches, INTEGER and S/H are respectively the control signal of integral time and sampling retention time, as shown in Figure 9.The high speed signal transaction card is sent in the output of range gating circuit again.
(3) high speed signal transaction card
The high speed signal processing element that adopts in the present embodiment is that the TMS320C30 that produces with American TI Company that can buy on the market is the signal processing card of basic engineering.Because TMS320C30 is a floating point calculator, can realize filtering, both forward and reverse directions blood flow analysis and analysis of spectrum arithmetical unit easily with it.
(4) control circuit:
Control circuit mainly should produce following control signal: pulse repetition rate PRF, transponder pulse RX, sampling volume RGATE, orthogonal signal SIN and COS, radio frequency amplifier ON/OFF control signal RW and range gating signal INTEGER, S/H etc. according to circuit requirement.The input of control circuit is address wire, data line and the control line of computing machine.Can change the concrete form (as exomonental width, sampling volume etc.) of above-mentioned each control signal at any time by computing machine.Figure 10 is the control circuit theory diagram.Steering logic in the present embodiment is to realize that by the High Density Programmable Logic Device that a slice U.S. ALTERA company produces Figure 11 is its pinouts, in fact Here it is hardware connection figure.Figure 12 is the oscillogram of relevant control signal.
Claims (1)
1, a kind of novel ultrasonic doppler blood flow measuring instrument, comprise transducer and
(1) radiating circuit: form by two triodes, two VMOS pipes and a transformer, the transponder pulse signal (RX, RXN) of two complementations that produced by system, control circuit is given two triodes respectively, through control VMOS pipe after the level conversion, two VMOS pipe alternate conduction, formed transponder pulse is through transformer coupled to the transducer wafer;
It is characterized in that:
(2) analog signal detection circuit:
The analog signal detection circuit is made of radio frequency amplifier, detuner and range gating circuit, that wherein radio frequency amplifier is selected for use is the operational amplifier A D600 of a slice low noise, broadband, variable gain, the GAT end is the ON/OFF control signal of amplifier, CH is the Amplifier Gain control signal, the simulating signal that is received by transducer is coupled to AD600 through inductance (L), electric capacity (C), send detuner after the amplification again; What detuner adopted is the MC1496 multiplier, and wherein SIN is a local oscillation signal, and echo is a ultrasound echo signal, and the radio frequency amplified analog signal converts single-ended output signal to through amplifier NE5534 then and gives distance choosing energy circuit through the multiplier demodulation; The range gating circuit is made up of integrator and sampling holder, comprising an amplifier (NE5534) and two switches, INTEGER and S/H are respectively the control signal of integral time and sampling retention time, and the high speed signal transaction card is sent in the output of range gating circuit again:
(3) high speed signal transaction card
The high speed signal processing element is to be the signal processing card of basic engineering with TMS320C30;
(4) control circuit:
The input that control circuit produces following control signal: pulse repetition rate PRF, transponder pulse RX, sampling volume RGATE, orthogonal signal SIN and COS, radio frequency amplifier ON/OFF control signal RW and range gating signal INTEGER, S/H control circuit is the address wire of computing machine, data line and control line, at any time change above-mentioned each control signal concrete form by computing machine, (EPLD) controls with scale programmable logic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98202128 CN2315567Y (en) | 1998-03-13 | 1998-03-13 | New supersonic Doppler blood flow detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98202128 CN2315567Y (en) | 1998-03-13 | 1998-03-13 | New supersonic Doppler blood flow detector |
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| Publication Number | Publication Date |
|---|---|
| CN2315567Y true CN2315567Y (en) | 1999-04-21 |
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ID=33959240
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98202128 Expired - Fee Related CN2315567Y (en) | 1998-03-13 | 1998-03-13 | New supersonic Doppler blood flow detector |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296012C (en) * | 2002-10-01 | 2007-01-24 | 深圳迈瑞生物医疗电子股份有限公司 | Full digital ultrasonic spectral Doppler imaging method and equipment |
| US7706476B2 (en) | 2006-11-27 | 2010-04-27 | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | Real-time digital quadrature demodulation method and device for ultrasonic imaging system |
| CN101837169A (en) * | 2010-03-12 | 2010-09-22 | 上海交通大学 | Ultrasound thermal therapy system for superficial tissues |
| CN108645465A (en) * | 2018-05-10 | 2018-10-12 | 四川理工学院 | A kind of flowmeter based on engineering mechanics |
| CN110037678A (en) * | 2019-04-08 | 2019-07-23 | 深圳市贝斯曼精密仪器有限公司 | A kind of blood flow velocity detection system |
-
1998
- 1998-03-13 CN CN 98202128 patent/CN2315567Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296012C (en) * | 2002-10-01 | 2007-01-24 | 深圳迈瑞生物医疗电子股份有限公司 | Full digital ultrasonic spectral Doppler imaging method and equipment |
| US7706476B2 (en) | 2006-11-27 | 2010-04-27 | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | Real-time digital quadrature demodulation method and device for ultrasonic imaging system |
| US8179997B2 (en) | 2006-11-27 | 2012-05-15 | Shenzhen Mindray Bio-Medical Electronics Co., Ltd | Real-time digital quadrature demodulation method and device for ultrasonic imaging system |
| CN101837169A (en) * | 2010-03-12 | 2010-09-22 | 上海交通大学 | Ultrasound thermal therapy system for superficial tissues |
| CN101837169B (en) * | 2010-03-12 | 2011-11-16 | 上海交通大学 | Ultrasound thermal therapy system for superficial tissues |
| CN108645465A (en) * | 2018-05-10 | 2018-10-12 | 四川理工学院 | A kind of flowmeter based on engineering mechanics |
| CN110037678A (en) * | 2019-04-08 | 2019-07-23 | 深圳市贝斯曼精密仪器有限公司 | A kind of blood flow velocity detection system |
| CN110037678B (en) * | 2019-04-08 | 2024-03-22 | 深圳市贝斯曼精密仪器有限公司 | Blood flow velocity detecting system |
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| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |