CN201171678Y

CN201171678Y - Ultrasonic diagnostic device emission mould

Info

Publication number: CN201171678Y
Application number: CNU2007201711792U
Authority: CN
Inventors: 兰海; 刘明宇
Original assignee: Shenzhen Landwind Industry Co Ltd
Current assignee: Shenzhen Landwind Industry Co Ltd
Priority date: 2007-11-28
Filing date: 2007-11-28
Publication date: 2008-12-31
Anticipated expiration: 2017-11-28

Abstract

The utility model discloses a transmitter module of an ultrasonic diagnosis device, which comprises a transmission control unit and a transmission unit connected with the transmission control unit, wherein, the transmission control unit is used for generating control signals and outputting the control signals to the transmission unit, and the transmission unit is used for transmitting pulse waveforms composed of at least 5 different levels according to the received control signals. The transmitter module of the ultrasonic diagnosis device uses the five different levels to compose the different pulse waveforms, so various broad pulse waveforms can be formed, thereby ensuring the transmission energy of the transmission unit, and increasing the depth of the human tissue investigation; besides, the formed single pulse or bipolar pulse has obvious echo characteristics, thereby greatly reducing the probability that echo signals are immersed by noises.

Description

A kind of transmitting module of ultrasonic diagnostic device

Technical field

This utility model relates to the ultrasonic diagnosis technical field, is specifically related to a kind of transmitting module of ultrasonic diagnostic device.

Background technology

In the ultrasonic system of prior art, produce impulse waveform by switching pulse generator and be transmitted on the ultrasonic transducer.For improving the longitudinal resolution of ultrasonic system, require to use narrow width-pulse usually to tissue; What but narrow width-pulse brought is the minimizing of emitted energy, causes the reduction of ultrasonic system to the tissue investigation depth.

Prior art the transmitted pulse of ultrasonic system adopts is continuous two level or continuous three level waveforms, can only produce simple one pole or bipolar pulse.This transmitted pulse is converted to ultrasonic signal by transducer and enters tissue, and the echo character of generation is not obvious, and when the investigation depth increasing, the energy of reflection echo reduces rapidly, is easy to be submerged among the system noise.

The utility model content

The technical problems to be solved in the utility model provides a kind of transmitting module of ultrasonic diagnostic device, it is narrow to overcome prior art transmitting module of ultrasonic diagnostic device transmitted pulse, influences defective and the simple one pole or the bipolar pulse echo character defective not obvious, that flooded by system noise easily of tissue investigation depth.

This utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be:

A kind of transmitting module of ultrasonic diagnostic device, comprise emission controlling unit and coupled transmitter unit, described emission controlling unit produces control signal and outputs to described transmitter unit, the impulse waveform that described transmitter unit is made up of at least 5 varying levels according to the described control signal emission of receiving.

Described transmitting module of ultrasonic diagnostic device, wherein said emission controlling unit is made as FPGA FPGA.

Described transmitting module of ultrasonic diagnostic device, the different control signal of wherein said emission controlling unit output is exported different level to drive described transmitter unit.

Described transmitting module of ultrasonic diagnostic device, wherein said transmitter unit comprises at least 5 signal paths, each described signal path comprises level switch module, AC coupled module and the high-voltage switch gear module that links to each other successively.

Described transmitting module of ultrasonic diagnostic device, wherein said high-voltage switch gear module is made as the MOS switch.

Described transmitting module of ultrasonic diagnostic device, wherein said level switch module is made as level translator.

The beneficial effects of the utility model are: this utility model transmitting module of ultrasonic diagnostic device uses 5 different level to constitute different impulse waveforms, therefore can form the broad pulse waveform of various ways various kinds, guarantee the emitted energy of transmitter module thus, increased the tissue investigation depth; And formed pulse or bipolar pulse have tangible echo character, have reduced the probability that echo-signal is flooded by noise greatly.

Description of drawings

This utility model comprises following accompanying drawing:

Fig. 1 is this utility model transmitting module of ultrasonic diagnostic device sketch map;

Fig. 2 is this utility model transmitting module of ultrasonic diagnostic device refinement module diagram;

Fig. 3 realizes circuit diagram for this utility model transmitting module of ultrasonic diagnostic device;

One of impulse waveform that Fig. 4 launches for this utility model transmitting module of ultrasonic diagnostic device;

Fig. 5 is two of the impulse waveform of this utility model transmitting module of ultrasonic diagnostic device emission.

The specific embodiment

With embodiment this utility model is described in further detail with reference to the accompanying drawings below:

As shown in Figure 1, this utility model transmitting module of ultrasonic diagnostic device comprises emission controlling unit and coupled transmitter unit.Transmitter unit adopts two bipolar voltages (wherein HVNN1=-HVPP1, HVNN2=-HVPP2=(1/2) * HVPP1) and a 0V (GND) current potential, and the level that has five grades altogether is as exomonental output level.Five control signals of emission controlling unit output are controlled the output of five level respectively, and its truth table sees Table 1:

Table 1

As shown in Figure 2, emission controlling unit is to produce 5 logic control signals with FPGA (Field Programmable GateArray, field programmable gate array), and its control mode is as shown in table 1.It should be noted that for 5 control signals to guarantee that in the same moment signal can only be arranged is 1, other are 0, occur otherwise have short-circuit conditions.For exomonental FREQUENCY CONTROL (promptly controlling exomonental width), can control by the length of 5 enable signals.Transmitter unit is to be made of 5 identical signal paths, and each signal path corresponds respectively to an output level.Each signal path then is made of three parts respectively: level switch module, AC coupled module and MOS switch module.The effect of level switch module is the logic level (being generally 3.3V) that FPGA exports to be converted to can control the needed voltage of MOS switch (being generally 12V).The effect of AC coupled module is to guarantee that the control signal of input MOS switch is a short pulse signal, prevents because false triggering makes the MOS switch be in the state of opening always.The effect of MOS switch module is by the conducting of metal-oxide-semiconductor or ends and reach the purpose that turns on and off corresponding high voltage level.At last five paths are linked together, just can obtain the output pulse waveform that needs.

As shown in Figure 3, U1 is FPGA, realizes the function of emission controlling unit, exports five control signal ENP1, ENN1, ENP2, ENN2, RTZ.G1, G2, G3, G4, G5 are level translator, realize the function of level switch module.What the path at G1, G3 and G4 place used is P channel MOS tube control output level (HVPP1, HVPP2 and GND), thereby compares with other paths, and level translator G1, G3 and G4 have also realized the function of level inversion.

C1, C2, C3, C4, C5 are coupling capacitance, realize the function of AC coupled module.

R1, R3, R5, R7, R9 are damping resistance, prevent the overshoot of control signal when high frequency.

D1, D2, D3, D4, D5 are the Schottky diode, and its effect is to improve switching speed.

R2, R6, R8 are pull-up resistor, and R4, R10 are pull down resistor, thereby their effect is consistent the ending of voltage that makes the grid and the source electrode of metal-oxide-semiconductor when not having control impuls to arrive.

M1, M2, M3, M4, M5 are enhancing property metal-oxide-semiconductor.Wherein M1, M3, M5 are P-MOS, are used for the control of malleation and 0V; M2, M4 are N-MOS, are used for the control of negative pressure.Its working mechanism is: when not having control impuls to be coupled to the grid of metal-oxide-semiconductor since on draw (or drop-down) resistance existence, thereby consistent the ending of voltage of the grid of metal-oxide-semiconductor and source electrode.When control impuls arrived, the grid of metal-oxide-semiconductor and the pressure reduction of source electrode (being generally 12V) were greater than cut-in voltage U _GSThereby, the MOS conducting.Output level is the pairing current potential of conducting MOS.

D6, D7, D8 are unidirectional conducting diode, are used for five connections between the output level.

Fig. 4 has used five all level for a kind of impulse waveform of this utility model transmitting module of ultrasonic diagnostic device emission.The envelope of this waveform is similar to sinusoidal wave form, in continuous impulse Doppler (CW) system, can effectively reduce secondary and multiple harmonic distortion, improves the resolution of system.Because this waveform is the bipolarity waveform, so can also apply to tissue harmonic imaging.

Be illustrated in figure 5 as another kind of transmitting pulse waveform, this impulse waveform has obvious characteristics with respect to common transmitted pulse, and promptly two big pulse tundish are drawn together two small-pulse effects.So in the signal that receives,, can illustrate that so this received signal is useful characteristic signal if also comprise this feature.Above example has only illustrated two kinds of transmitting pulse waveforms, clearly, when adopting different control codes, can form a variety of transmitting pulse waveforms.Therefore for other transmitting pulse waveform, also should be defined within the scope of the present utility model.

Those skilled in the art do not break away from essence of the present utility model and spirit, can there be the various deformation scheme to realize this utility model, the above only is the preferable feasible embodiment of this utility model, be not so limit to interest field of the present utility model, the equivalent structure that all utilization this utility model description and accompanying drawing content are done changes, and all is contained within the interest field of the present utility model.

Claims

1, a kind of transmitting module of ultrasonic diagnostic device, it is characterized in that: comprise emission controlling unit and coupled transmitter unit, described emission controlling unit produces control signal and outputs to described transmitter unit, the impulse waveform that described transmitter unit is made up of at least 5 varying levels according to the described control signal emission of receiving.

2, transmitting module of ultrasonic diagnostic device according to claim 1 is characterized in that: described emission controlling unit is made as FPGA FPGA.

3, transmitting module of ultrasonic diagnostic device according to claim 2 is characterized in that: the different control signal of described emission controlling unit output is exported different level to drive described transmitter unit.

4, transmitting module of ultrasonic diagnostic device according to claim 3 is characterized in that: described transmitter unit comprises at least 5 signal paths, and each described signal path comprises level switch module, AC coupled module and the high-voltage switch gear module that links to each other successively.

5, transmitting module of ultrasonic diagnostic device according to claim 4 is characterized in that: described high-voltage switch gear module is made as the MOS switch.

6, transmitting module of ultrasonic diagnostic device according to claim 5 is characterized in that: described level switch module is made as level translator.