CN112206003A - Multi-probe ultrasonic instrument and cascade structure of socket thereof - Google Patents
Multi-probe ultrasonic instrument and cascade structure of socket thereof Download PDFInfo
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Abstract
The invention discloses a cascade structure of a multi-probe ultrasonic instrument and a socket thereof, wherein the cascade structure comprises: n selection switches having a first conductive state and a second conductive state, the selection switches comprising: the switching circuit comprises a trunk end, a first switching end and a second switching end, wherein N is a positive integer; the first conduction state is that the trunk end is conducted with the second switching end, and the second conduction state is that the trunk end is conducted with the first switching end; the selection switch is used for switching between a first conduction state and a second conduction state according to the received control signal; the second switching end of each selection switch is connected with at most one probe socket, and M is a positive integer; the N selection switches are sequentially connected in series with the first switching end through the trunk end. The cascade structure provided by the invention has the advantages that on one hand, the space utilization rate can be improved through serial cascade, on the other hand, the signal flow is clear and smooth in the cascade mode, the signal routing staggering is reduced, and the advantages in signal quality are achieved.
Description
Technical Field
The invention relates to the technical field of ultrasonic detection, in particular to a multi-probe ultrasonic instrument and a cascade structure of a socket thereof.
Background
The front end of the medical ultrasonic imaging system is generally composed of a plurality of independent physical array element circuits, and basic ultrasonic imaging is realized by controlling transmitting and receiving beams of the independent physical array elements. With the continuous development of technology and the demand trend of market diversification, the number of array elements of the ultrasonic system is more and more.
The ultrasonic imaging system supporting the multi-probe socket switches the independent physical array element channels through the switch and is connected to the appointed probe socket. Currently mainstream mid-to-high end cart-based ultrasound systems typically contain 128 physical channels and 4 probe receptacles. With the technological development and the flexible and convenient market demand trend, the number of channels and the number of probe sockets are further increased, and the complexity of signal flow of the probe sockets is increased. Due to the limitations of board cards, device material size, cost and other factors, the traditional scheme adopted by the multi-channel multi-probe socket ultrasound system faces bottlenecks and challenges.
The "conventional solution" is shown in fig. 1: channel signal flow using 1-2-4- … -2N-1The "T" type branch mode of (1) is switched. If the number of probe receptacles is M, a number of levels N is required,
N＝nextpow2(M)，
from the 1 st stage to the N-1 st stage, the number of the required relay groups is 2n-1(N is a certain stage), the Nth stage needs the number of relay groups D (considering the condition that M is not an integral multiple of 2),
for example, for a 5-probe socket ultrasound system, 3-stage relays are required in total, the number D of the 3 rd-stage required relay groups is 1, and 4 groups of relays are required for switching the overall signal flow. If the system is 128 array elements, each group of modules using a dual channel relay array will contain 64, for a total of 4 groups of 256. Under the control of a logic command issued by the upper computer, the relay performs specified switching action to realize specific signal flow switching. The 256 relays are arranged mainly in the area a shown in fig. 1, and are arranged to surround the probe socket at least partially. This arrangement presents problems with the number of probe receptacles, the number of channels increasing,
1) limited by space and process capability, the probe socket cannot be further expanded, and the product requirements of more probes and channels cannot be met. In space, as the number of probe sockets and the number of channels increase, the number of relays in the same proportion increases, the relays are mainly distributed by using an area A due to a T-shaped branch topological structure, the space utilization rate is low, and a serious bottleneck exists under the condition that the size of the whole machine is limited; in terms of process capability, channel signals are staggered in a T-shaped branch mode, more layers of PCBs (printed circuit boards) can be distributed only by increasing the number of probe sockets and the number of channels, and the number of the layers of the PCBs cannot be continuously increased due to the limitation of the process capability of the PCBs;
2) the "T" branch approach costs are increasing as the number of probe receptacles and channels increases. Because of low space utilization, the PCB of the T-shaped branch has large size; because the channel signals are staggered, the PCB layer is increased, and the PCB cost is greatly increased;
3) the PCB development complexity is high and the period is long. T-shaped branched channel signals are staggered, but ultrasonic channel routing requires that the number of via holes is reduced as much as possible, so that the PCB is high in layout and wiring difficulty, large in workload and long in development period;
4) the signal quality is affected. T-shaped branch channel signals are staggered, routing is winding and unsmooth, and signal quality is affected.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a multi-probe ultrasonic apparatus and a cascade structure of a socket thereof, so as to solve the above problems in the prior art.
According to a first aspect, an embodiment of the present invention provides a cascade structure of a multi-probe ultrasonic instrument socket, including: n selection switches having a first conductive state and a second conductive state, the selection switches comprising: the switching circuit comprises a trunk end, a first switching end and a second switching end, wherein N is a positive integer; the first conduction state is that the trunk end is conducted with the second switching end, and the second conduction state is that the trunk end is conducted with the first switching end; the selection switch is used for switching between the first conduction state and the second conduction state according to a received control signal; the second switching end of each selection switch is connected with at most one probe socket, and M is a positive integer; the N selection switches are sequentially connected in series through the trunk end and the first switching end.
With reference to the first aspect, in an embodiment of the first aspect, the trunk terminal of the (N + 1) th selection switch is connected to the first switch terminal of the nth selection switch, N is a positive integer, and 1 ≦ N < N.
With reference to the first aspect, in an embodiment of the first aspect, the first switching end of the (N + 1) th selection switch is connected to the trunk end of the nth selection switch, N is a positive integer, and 1 ≦ N < N.
With reference to the first aspect, in an embodiment of the first aspect, the selection switch is a relay.
With reference to the first aspect, in an embodiment of the first aspect, the relationship between the number of the selection switches and the number of the probe sockets is: N-M-1; the Mth socket probe is connected to the first switching terminal of the Nth or 1 st selector switch.
With reference to the first aspect, in an embodiment of the first aspect, the probe socket directly connected to the selection switch is disposed on one side of the corresponding selection switch, and forms a control stage; a control stage has corresponding separate areas on the board for receiving the selector switch and the probe socket.
According to a second aspect, an embodiment of the present invention provides a multi-probe ultrasonic instrument, including: the cascade structure of the multi-probe ultrasonic instrument socket according to any one of the embodiments of the first aspect or the second aspect comprises a selection switch driving circuit, an ultrasonic front-end signal input end, and the cascade structure of the multi-probe ultrasonic instrument socket according to any one of the embodiments of the first aspect or the second aspect, wherein the ultrasonic front-end signal input end is connected with the selection switch driving circuit, the selection switch driving circuit is respectively connected with the N selection switches, and the ultrasonic front-end signal input end is used for sending a digital control signal to the selection switch driving circuit and controlling the N selection switches to be turned on or turned off through the selection switch driving circuit; the ultrasonic front end signal input end is connected with the 1 st selector switch, and is used for sending an analog channel signal to the 1 st selector switch.
With reference to the second aspect, in an embodiment of the second aspect, when the selection switch is a monostable relay, the digital control signal includes at least N control signals.
With reference to the second aspect, in an embodiment of the second aspect, when the selection switch is a latching relay, the digital control signal includes at least 2N control signals.
With reference to the second aspect or any one of the embodiments of the second aspect, in an embodiment of the second aspect, the multi-probe ultrasound apparatus further includes: and the serial port-to-parallel port conversion module is connected between the ultrasonic front end signal input end and the selection switch driving circuit.
The embodiment of the invention has the advantages that,
1) the serial cascade mode eliminates the bottleneck of probe socket and channel expansion, and the number of the probe sockets and the number of the channels can be infinitely expanded theoretically. In space, serial cascade is based on each probe socket, and a modular design is adopted, so that the layout space utilization rate is improved, the PCB space is saved, and the space bottleneck problem of a multi-probe socket and a multi-channel machine type is eliminated;
2) the serial cascade mode can obviously reduce the cost of products (particularly the probe socket board). On one hand, the space utilization rate is improved in a serial cascade mode, the size of the PCB is reduced, on the other hand, the number of the board cards is reduced, the number of the layers does not need to be increased in proportion to the number of the probe sockets and the number of the channels, and the PCB cost is obviously reduced;
3) the serial cascade layout has the advantage of modularization, so that the PCB layout, wiring difficulty and workload are greatly reduced, and the development period is shortened;
4) the serial cascade mode signal flow is clear and smooth, the signal routing staggering is reduced, and certain advantages are achieved in the aspect of signal quality;
5) through setting up serial ports to the conversion module of parallel port, can effectively reduce upper computer control module's logic pin quantity, improve the interface utilization ratio simultaneously.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
FIG. 1 shows a topology diagram of a prior art hierarchical cascading relay layout for a multi-probe socket;
fig. 2A and 2B are schematic structural diagrams illustrating a cascade structure of a multi-probe ultrasonic instrument socket according to an embodiment of the present invention;
FIGS. 3A and 3B are schematic structural diagrams of a multi-probe ultrasound apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic connection diagram of a serial port to parallel port module according to an embodiment of the present invention;
fig. 5 shows a schematic diagram of a selection switch driving circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In contrast to the conventional hierarchical cascade structure mentioned in the background, the embodiment of the present invention provides a cascade structure of a multi-probe ultrasonic instrument socket, as shown in fig. 2A, the cascade structure includes: the probe socket comprises N selection switches 11 with a first conduction state and a second conduction state, M probe sockets 12 and M probe sockets, wherein the probe sockets are connected with the second switching ends of the selection switches, and N, M is a positive integer.
Specifically, the selector switch 11 includes: the switch circuit comprises a main terminal a, a first switch terminal b1 and a second switch terminal b2, wherein the main terminal a is used for receiving a control signal to control the on/off of the main terminal a and the two switch terminals b1 and b 2. The N selection switches 11 are connected in series with the first switch terminal b1 through the trunk terminal a.
The first conducting state is that the trunk terminal a is conducted with the second switch terminal b2, and the second conducting state is that the trunk terminal a is conducted with the first switch terminal b 1; the selector switches 11 are configured to switch between the first conducting state and the second conducting state according to the received control signal, and a second switching end of each selector switch 11 is connected to at most one probe socket 12.
As shown in fig. 2A, the first switching terminal b1 of the 1 st to (N-1) th selector switches 11 is connected to the trunk terminal a of the adjacent selector switch 11, and the second switching terminal b2 is connected to a probe socket 12; for example, the first switch terminal b1 of the (n + 1) th selector switch 11 is connected to the trunk terminal a of the nth selector switch 11, the second switch terminal b2 is connected to the 1 st probe socket 12, and so on.
And the first switching terminal b1 of the 1 st selector switch 11 is connected to the M-th probe jack 12, and the second switching terminal b2 is connected to the (M-1) -th probe jack 12.
As shown in fig. 2A, the ultrasonic front signal flow is connected to the 1 st selector switch 11 at the right end to form a cascade topology of signal flow transmission similar to a '+' type, and optionally, in some embodiments of the present invention, a cascade topology of signal flow transmission similar to an 'L' type as shown in fig. 2B may also be formed, in which the first switch terminal B1 of the 1 st to (N-1) th selector switches 11 is connected to the trunk terminal a of the adjacent selector switch 11, and the second switch terminal B2 is connected to a probe socket 12; for example, the first switch terminal b1 of the 1 st selector switch 11 is connected to the trunk terminal a of the 2 nd selector switch 11, the second switch terminal b2 is connected to the 1 st probe socket 12, and so on. And the first switching terminal b1 of the last (Nth) selector switch 11 is connected to the Mth probe jack 12, and the second switching terminal b2 is connected to the (M-1) th probe jack 12. In the cascade topology of "L" type signal stream transmission, the ultrasonic front-end signal stream is connected to the 1 st selector switch 11 at the left end.
Optionally, in some embodiments of the present invention, the selection switch 11 shown in fig. 2A and 2B may be, for example, a single-pole double-throw relay, but the present invention is not limited thereto, and in other alternative embodiments, the selection switch 11 may also be another single-pole double-throw type switch as needed.
For the above-mentioned "L" type signal flow transmission cascade topology and "L" type signal flow transmission cascade topology, the signal flow at the time of switching on different probe sockets is as follows:
switching on a No. 1 probe socket: the ultrasonic simulation channel is communicated with the middle stage R1In of the 1 st group of selection switches, and is switched to a contact R1P to be communicated with the probe socket 1 under the control of an upper computer in a single-pole double-throw mode;
switching on a No. 2 probe socket: after passing through the 1 st group of selector switches, the ultrasonic analog channel signals are communicated with the middle level R2In of the 2 nd group of selector switches, and then switched to the R2P contact to be communicated with the probe socket 2;
switching on a 3# probe socket: after passing through the 2 nd group of selection switches, the ultrasonic analog channel signal is communicated with the 3 rd group of selection switches, namely the middle level R3In, and then is switched to the R3P contact to be communicated with the probe socket 3;
by analogy, the M # probe socket is switched on: and after passing through the N-1 group of selection switches, the ultrasonic analog channel signal is communicated with the intermediate-level RNIn of the N group of selection switches, and then is switched to the RMP contact to be communicated with the probe socket M.
It can be seen that each set of selection switches in the series cascade has a similar connection network, receiving channel signals from the previous stage, and then switching to a probe socket or intermediate stage of the next set of selection switches. This topology has modular properties and strong expandability. Each group of the selection switches can be placed nearby the probe sockets to be switched and then sequentially unfolded according to the number of the probe sockets. The last set of selection switches connects the two switch contacts to the (M-1) th and Mth probe receptacles, respectively. It should be noted that the ultrasound transmit-receive analog signals share one channel, and the flow direction thereof is bidirectional.
According to the serial cascade topology described above, the relationship between the number N of select switch sets and the probe socket M is: N-M-1.
As described in the background art, if the number M of probe sockets is not an integer multiple of 2, for example, 5 probe sockets, the last-stage design of the conventional hierarchical cascading method is relatively complex, and reference may be made to the calculation method for the number D of the nth-stage relay groups in the background art, and meanwhile, it is a great design challenge to layout the D groups of relays.
In contrast, the design difficulty of the serial cascade structure provided by the embodiment of the invention is greatly reduced, and no matter whether M is an integral multiple of 2, the same topological mode is adopted, and each group of relays are sequentially placed close to the corresponding probe socket.
In practical application, the probe socket 12 directly connected to the selection switch 11 can be disposed on one side of the corresponding selection switch 11 to form a control stage; one control stage has corresponding separate areas on the board for receiving the selector switch 11 and the probe socket 12. The selection switches 11 are distributed near adjacent probe sockets in a grouped manner, so that the bottleneck that the hierarchical cascade relay is placed in the space is eliminated, and the space utilization rate of the board card is improved.
In summary, the cascade structure of the multi-probe ultrasonic instrument socket provided by the embodiment of the present invention has the following advantages:
1) the serial cascade signal flow direction is clear and smooth, the signal interleaving is reduced, and the PCB design difficulty and workload are reduced;
2) from 1# to M # probe socket, N groups of selection switches are used, the layout and wiring mode of each group of selection switch array are consistent, the modular design can be adopted, the PCB design workload can be greatly reduced, and the development period can be shortened;
3) the selective switches are distributed and placed near the adjacent probe sockets in a grouped manner, so that the bottleneck that the hierarchical cascade relay is placed in the space is eliminated, the space utilization rate of the board card is improved, and the design requirement of more probe sockets is greatly met;
4) due to modular development, the serial cascade design can carry out detailed design and simulation analysis on the layout and wiring of a group of relays, and can apply the improved and improved mode of the performance to other relay modules, so that the design is competitive in the later optimization of the system.
An embodiment of the present invention further provides a multi-probe ultrasonic apparatus, as shown in fig. 3A, the multi-probe ultrasonic apparatus includes: the cascade structure of the selection switch driving circuit, the ultrasonic front-end signal input end, and the multi-probe ultrasonic instrument socket is a cascade structure formed by a plurality of probe sockets and a selection switch, and in an optional embodiment, the cascade structure may be the cascade structure of the multi-probe ultrasonic instrument socket described in any of the above embodiments, and is not described herein again.
The ultrasonic front-end signal input end of the multi-probe ultrasonic instrument is connected with a selection switch driving circuit, the selection switch driving circuit is respectively connected with N selection switches of a cascade structure of a multi-probe ultrasonic instrument socket, and the ultrasonic front-end signal input end is used for sending digital control signals to the selection switch driving circuit and controlling the N selection switches to be turned on or turned off through the selection switch driving circuit. As shown in fig. 5, the selection switch drive circuit level-shifts the drive signals of the selection switches by Cntl _ a and Cntl _ B. For example, the voltage signal of the terminal a is made to be 12V by the control signal of the terminal Cntl _ a, and the terminal B is grounded by the control signal of the terminal Cntl _ B, and at this time, the signal flows from the pin 1 to the pin 8 inside the selection switch (for example, a relay), so that the selection switch is switched from the pin 3 to the pin 2, and the pin 6 to the pin 7; alternatively, the voltage signal at the end a is grounded by the control signal at the end Cntl _ a, and the voltage signal at the end B is 12V by the control signal at the end Cntl _ B, and at this time, the signal flows from the 8-pin to the 1-pin inside the relay, so that the selection switch is switched from the 2-pin to the 3-pin and from the 7-pin to the 6-pin, and through this process, the input voltage of the digital signal is raised from a lower voltage value (for example, 3.3V) to a voltage value (for example, 12V) capable of driving the selection switch.
The ultrasonic front-end signal input end is connected with the 1 st selection switch of the cascade structure of the multi-probe ultrasonic instrument socket, and the ultrasonic front-end signal input end is used for sending an analog channel signal to the 1 st selection switch.
Optionally, in some embodiments of the present invention, when a relay is selected as the selection switch, if it is a monostable type relay, at least N control signals are required; if the relay is a latching relay, 2N paths of control signals are needed. If the number of probe jacks is increased, the number of control signals will increase significantly.
An ultrasonic system usually uses a board card to switch for a probe socket signal stream, and pin resources are very tight considering that a board connector plugged with an ultrasonic module contains a large number of channel signals. In order to solve the above problem, in some alternative embodiments of the present invention, as shown in fig. 3B, a serial port to parallel port module as shown in fig. 4 is configured on the probe socket board for the selection switch control signal, and is connected between the ultrasonic front end signal input end and the selection switch driving circuit to reduce the number of occupied pins.
Optionally, in some embodiments of the present invention, as shown in fig. 4, the multi-probe ultrasonic apparatus is connected to an ultrasonic upper computer, and the ultrasonic upper computer may communicate with the serial port to parallel port module on the probe socket board through a serial port such as IIC, and output parallel port signals, including digital signals such as selection switch driving control, or other probe plug detection, probe code, and probe internal control, to implement different functions. In addition, since the driving capability of the parallel port signal output by the serial port to parallel port module is usually not enough to drive the select switch, the driving capability of the driving signal can be improved by performing level conversion through the select switch circuit (for example, when the driving voltage of the select switch is 12V, and the voltage of the parallel port signal is usually not up to 12V, the output voltage of the parallel port signal can be adjusted to the 12V driving voltage through the select switch driving circuit).
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (11)
1. A cascade structure of a multi-probe ultrasound instrument socket, comprising:
n selection switches having a first conductive state and a second conductive state, the selection switches comprising: the switching circuit comprises a trunk end, a first switching end and a second switching end, wherein N is a positive integer;
the first conduction state is that the trunk end is conducted with the second switching end, and the second conduction state is that the trunk end is conducted with the first switching end; the selection switch is used for switching between the first conduction state and the second conduction state according to a received control signal;
the second switching end of each selection switch is connected with at most one probe socket, and M is a positive integer;
the N selection switches are sequentially connected in series through the trunk end and the first switching end.
2. The cascade structure of multi-probe ultrasound instrument sockets of claim 1, wherein the trunk terminal of the (N + 1) th selection switch is connected to the first switch terminal of the nth selection switch, N is a positive integer, and 1 ≦ N < N.
3. The cascade structure of multi-probe ultrasonic instrument sockets of claim 1, wherein the first switch terminal of the (N + 1) th selector switch is connected to the trunk terminal of the nth selector switch, N is a positive integer, and N is greater than or equal to 1 and less than N.
4. The cascade structure of multi-probe ultrasound instrument sockets of claim 1, wherein the selection switch is a relay.
5. The cascade structure of multi-probe ultrasound instrument sockets of claim 1, wherein the mth socket probe is connected to the first switch terminal of the nth or 1 st selector switch.
6. The cascade structure of multi-probe ultrasound instrument sockets of claim 5, wherein the relationship between the number of selection switches and the number of probe sockets is: N-M-1.
7. The cascade structure of multi-probe ultrasound instrument sockets of claim 1,
the probe socket directly connected with the selection switch is arranged on one side of the corresponding selection switch to form a control stage;
a control stage has corresponding separate areas on the board for receiving the selector switch and the probe socket.
8. A multi-probe ultrasound instrument, comprising: a cascade structure of a selection switch driving circuit, an ultrasonic front-end signal input terminal and the multi-probe ultrasonic instrument socket according to any one of claims 1 to 7,
the ultrasonic front-end signal input end is connected with the selection switch driving circuit, the selection switch driving circuit is respectively connected with the N selection switches, and the ultrasonic front-end signal input end is used for sending a digital control signal to the selection switch driving circuit and controlling the N selection switches to be turned on or turned off through the selection switch driving circuit;
the ultrasonic front end signal input end is connected with the 1 st selector switch, and is used for sending an analog channel signal to the 1 st selector switch.
9. The multi-probe ultrasound machine according to claim 8, wherein the digital control signal comprises at least N control signals when the selection switch is a monostable relay.
10. The multi-probe ultrasound instrument according to claim 8, wherein the digital control signal comprises at least 2N control signals when the selection switch is a latching relay.
11. The multi-probe ultrasound instrument according to any one of claims 8 to 10, further comprising:
and the serial port-to-parallel port conversion module is connected between the ultrasonic front end signal input end and the selection switch driving circuit.
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