Selection circuit, emission power supply and ultrasonic equipment

Abstract

The utility model discloses a selection circuit, an emission power supply and ultrasonic equipment, and solves the problem of different emission current demands in different imaging modes. According to the scheme, in the shear wave imaging mode, the resistance value is small when the shear wave path is conducted, so that large transient wave beam energy is provided for the transmitting circuit; in a conventional imaging mode, such as a conventional PW or Color mode, the resistance value of a conventional path is large, at the moment, relatively small energy is provided for the transmitting circuit, and the transmitting requirement in the conventional imaging mode can be met. In conclusion, through switching of the shear wave path and the conventional path, efficient transmission of appropriate emission current and emission energy in different imaging modes is achieved, the current requirements in the shear wave imaging mode and the conventional imaging mode are met at the same time, and the adaptability and performance of the switching power supply are improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit design, and in particular to a selection circuit, a transmitting power supply, and an ultrasonic device. Background Technology

[0002] In medical ultrasound equipment, different operating modes place varying performance requirements on the high-voltage transmitting power supply. For example, in conventional imaging modes, such as PW (pulse wave) and Color (color Doppler) modes, although the transmitting current is relatively small, there are high demands on the response speed and recovery time of the transmitting power supply because the transmission characteristics in these modes are transient. In contrast, shear wave imaging mode differs from traditional longitudinal wave ultrasound imaging; it uses transverse waves to image tissue by pushing or exciting it. Because shear wave imaging mode requires applying a large transient beam energy to the tissue, it requires a much larger transmitting current from the power supply, typically more than a hundred times that of conventional imaging modes.

[0003] like Figure 1 As shown, in existing technologies, a resistor R is typically placed in the path between the switching power supply and the transmitting circuit. However, in shear wave imaging mode, a large transient current is required, but the presence of resistor R leads to a significant voltage drop, causing distortion of the transmitted voltage and affecting the quality of ultrasound imaging. In contrast, in conventional imaging modes (such as PW and Color modes), the presence of resistor R helps improve circuit stability and prevents oscillations or instability under low current conditions. Therefore, selecting an appropriate resistor R becomes a critical trade-off in the design. If the resistor is too large, it may affect the performance of the shear wave imaging mode; if the resistor is too small, it may affect the stability of the system in conventional imaging modes. This contradiction presents a significant challenge for commissioning personnel.

[0004] Therefore, how to flexibly control the ultrasonic equipment to provide a large emission current in shear wave imaging mode and a small emission current in conventional imaging mode is a key technical challenge in the design of ultrasonic equipment. Utility Model Content

[0005] The purpose of this invention is to provide a selection circuit, a transmitting power supply, and an ultrasonic device that, through a shear wave path and a first path, achieves efficient transmission of appropriate transmitting current in different imaging modes, while simultaneously meeting the current requirements of both shear wave imaging mode and conventional imaging mode, thereby improving the adaptability and performance of the switching power supply.

[0006] To solve the above-mentioned technical problems, this application provides a selection circuit, including:

[0007] The capacitor has its first terminal connected to the output terminal of the switching power supply and its second terminal grounded.

[0008] The first path is connected to the first terminal of the capacitor to form a first connection point;

[0009] A shear wave path, the input end of which is connected to the first connection point, and the output end of which is connected to the output end of the first path to obtain a second connection point, the second connection point is also connected to the transmitting circuit of the ultrasound device;

[0010] The shear wave path is configured to be in a connected state when the ultrasound device is operating in shear wave imaging mode, and in a disconnected state when the ultrasound device is operating in conventional imaging mode.

[0011] The resistance of the shear wave path when it is conducting is much smaller than the resistance of the first path.

[0012] Optionally, the first path includes at least one resistive element, with its first end connected to the first connection point and its second end connected to the second connection point;

[0013] The shear wave path includes a switching circuit, with its first end connected to the first connection point and its second end connected to the second connection point;

[0014] The switching circuit is configured to be in a closed state when the ultrasound device is operating in the shear wave imaging mode, and in a closed state when the ultrasound device is operating in the conventional imaging mode.

[0015] Optionally, the switching circuit includes:

[0016] A first controllable switch, wherein its first end is connected to the first connection point and its second end is connected to the second connection point;

[0017] The first control circuit has its output terminal connected to the control terminal of the first controllable switch.

[0018] The first control circuit is used to control the first controllable switch to be turned on when the ultrasound device is operating in the shear wave imaging mode, and to be turned off when the ultrasound device is operating in the conventional imaging mode.

[0019] Optionally, the first control circuit includes a second controllable switch, a first resistor, and a second resistor;

[0020] The first end of the first resistor is connected to the first connection point, the second end of the first resistor is connected to the first end of the second resistor and the control end of the first controllable switch, the second end of the second resistor is connected to the first end of the second controllable switch, the second end of the second controllable switch is grounded, and the control end of the second controllable switch serves as the input end of the first control circuit.

[0021] The second controllable switch is turned on when a first signal corresponding to the shear wave imaging mode is input to its control terminal, so as to turn on the first controllable switch; and turned off when a second signal corresponding to the conventional imaging mode is input to its control terminal, so as to turn off the first controllable switch.

[0022] Optional, also includes:

[0023] The response circuit has its input terminal connected to the first terminal of the capacitor to form a third connection point, and its output terminal connected to the input terminal of the first path and the input terminal of the shear wave path to form a fourth connection point.

[0024] The response circuit is configured to be in a closed-circuit state when the ultrasound device is in operation.

[0025] Optionally, the response circuit includes a third controllable switch and a second control circuit;

[0026] The first end of the third controllable switch is connected to the third connection point, the second end of the third controllable switch is connected to the fourth connection point, and the control end of the third controllable switch is connected to the second control circuit.

[0027] The second control circuit is used to control the third controllable switch to be in the open state when the ultrasonic equipment is working.

[0028] Optionally, the second control circuit includes an operational amplifier, a third resistor, and a fourth resistor;

[0029] The first end of the third resistor is connected to the fourth connection point, the second end of the third resistor is connected to the first end of the fourth resistor and the first input end of the operational amplifier, the second end of the fourth resistor is grounded, the second input end of the operational amplifier receives a control voltage, and the output end of the operational amplifier is connected to the control end of the third controllable switch.

[0030] The control voltage is the analog voltage corresponding to the digital control signal used to control the operation of the ultrasonic device.

[0031] Optional, also includes:

[0032] The digital-to-analog converter has its output terminal connected to the second input terminal of the operational amplifier, and its input terminal receives the digital control signal.

[0033] The digital-to-analog converter is used to convert the digital control signal into the analog voltage.

[0034] To solve the above-mentioned technical problems, this application also provides a transmitting power supply, including a switching power supply and two selection circuits as described above;

[0035] The positive output terminal of the switching power supply is connected to the input terminal of the first selection circuit, and the output terminal of the first selection circuit is the positive output terminal of the transmitting power supply.

[0036] The negative output terminal of the switching power supply is connected to the input terminal of the second selection circuit, and the output terminal of the second selection circuit is the negative output terminal of the transmitting power supply.

[0037] To solve the above-mentioned technical problems, this application also provides an ultrasonic device, including a transmitting circuit and a transmitting power supply as described above;

[0038] The positive output terminal of the transmitting power supply is connected to the positive power input terminal of the transmitting circuit.

[0039] The negative output terminal of the transmitting power supply is connected to the negative power input terminal of the transmitting circuit.

[0040] This invention provides a selection circuit, a transmitting power supply, and an ultrasonic device to solve the problem of varying transmitting current requirements under different imaging modes. In shear wave imaging mode, both the shear wave path and the first path are active. The shear wave path has a lower resistance when conducting, enabling efficient transmission of a larger first current to provide greater transient beam energy to the transmitting circuit. In conventional imaging modes, such as standard PW or Color modes, the first path is active while the shear wave path is disconnected. The first path has a higher resistance and conducts, providing a smaller second current, which can meet the transmitting requirements of conventional imaging modes. In summary, this application, through the shear wave path and the first path, achieves efficient transmission of appropriate transmitting current under different imaging modes, simultaneously meeting the current requirements of both shear wave and conventional imaging modes, thus improving the adaptability and performance of the switching power supply. Attached Figure Description

[0041] To more clearly illustrate the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of a transmitting power source in the prior art;

[0043] Figure 2 This is a schematic diagram of another transmitting power source in the prior art;

[0044] Figure 3 A schematic diagram of a transmitting power source provided by this utility model;

[0045] Figure 4A schematic diagram of a first control circuit provided by this utility model;

[0046] Figure 5 A schematic diagram of a second control circuit connected to the positive output terminal of a switching power supply provided by this utility model;

[0047] Figure 6 This is a schematic diagram of a second control circuit connected to the negative output terminal of a switching power supply provided by this utility model. Detailed Implementation

[0048] The core of this invention is to provide a selection circuit, a transmitting power supply, and an ultrasonic device. Through the shear wave path and the first path, it achieves efficient transmission of appropriate transmitting current in different imaging modes, while meeting the current requirements of both shear wave imaging mode and conventional imaging mode, thus improving the adaptability and performance of the switching power supply.

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0050] exist Figure 1In this design, the HV2 needs to support both shear wave imaging mode and conventional imaging modes (such as PW and Color modes). However, this design faces some inherent contradictions and challenges. Firstly, in shear wave imaging mode, due to the need for a large transient current, if a resistor R is present, the large transient current passing through R will generate a significant voltage drop, leading to significant distortion of the transmission voltage and affecting the quality of the ultrasound imaging. However, in conventional imaging modes, such as PW and Color modes, the presence of resistor R is desirable because it improves circuit stability and prevents oscillations or instability under lower current conditions. Therefore, choosing the appropriate value for resistor R becomes a crucial trade-off. If resistor R is too large, it will affect the performance of the shear wave imaging mode; if it is too small, it may affect the system stability in conventional imaging modes. This contradiction presents a significant challenge for commissioning personnel. Additionally, an operational amplifier is typically connected across resistor R to sample the current across it, enabling overcurrent or open-circuit protection. However, since the shear wave imaging mode and the conventional imaging mode share the same voltage signal (HV2), this design limits the optimization design of the protection circuit and cannot provide targeted protection measures for different modes separately (in the conventional imaging mode, overcurrent protection is normal, but in the shear wave imaging mode, the overcurrent protection is easily triggered due to the larger current).

[0051] To solve these problems, Figure 2 The proposed solution involves adding a new high-voltage channel, HV3, so that HV2 is used only for shear wave imaging mode, while HV1 and HV3 are dedicated to conventional imaging mode. While this solution effectively avoids the aforementioned contradictions, its drawbacks include increased design costs and the need for more space on the PCB, leading to increased overall design complexity and cost.

[0052] To solve the above-mentioned technical problems, this application provides a selection circuit, such as... Figure 3 Taking positive voltage as an example, +HVB_IN is the positive output terminal of the switching power supply, and +HVB is the positive output terminal of the selection circuit, which includes:

[0053] The capacitor has its first terminal connected to the output terminal of the switching power supply and its second terminal grounded.

[0054] The first path 12 has its input terminal connected to the first terminal of the capacitor to obtain the first connection point;

[0055] Shear wave path 13 has its input end connected to the first connection point and its output end connected to the output end of the first path 12 to obtain a second connection point. The second connection point is also connected to the transmitting circuit of the ultrasound device.

[0056] Among them, the shear wave path 13 is used to be in the path state when the ultrasound equipment is working in the shear wave imaging mode, and in the open circuit state when the ultrasound equipment is working in the conventional imaging mode.

[0057] The resistance of shear wave path 13 when it is conducting is much smaller than the resistance of the first path 12.

[0058] First, it's important to understand that the transient transmit current in conventional imaging modes (such as standard PW and Color modes) is relatively small compared to that in shear wave imaging modes. Conventional imaging modes place high demands on the response speed and recovery time of the switching power supply. Shear wave imaging differs from traditional ultrasound imaging. Traditional ultrasound is a longitudinal wave, while shear wave is a transverse wave. It works by projecting a beam of energy that pushes or excites human tissue. The instantaneous beam energy propagates laterally across the tissue, and the tissue's stiffness, elasticity, and other parameters are calculated based on the received ultrasound echoes. Because it requires pushing the tissue, the transient current supplied by the power supply for shear wave imaging is extremely large. The magnitude of the transmit current is typically: the transmit current of shear wave imaging is hundreds of times greater than that of conventional imaging modes.

[0059] Specifically, the selection circuit provided in this embodiment can be applied to the switching power supply in an ultrasound device. Its basic principle is as follows: In the ultrasound device, the selection circuit dynamically switches the signal path according to the operating mode (shear wave imaging mode or conventional imaging mode) to optimize signal transmission and imaging quality. The first end of the capacitor is connected to the output terminal of the switching power supply, and the second end is grounded. This is used to store energy in the switching power supply to provide a large instantaneous energy (i.e., to provide transient current to the transmitting circuit) when the transmitting circuit is operating.

[0060] The first path 12 serves as the default signal path, ensuring that in normal imaging mode, the transmission current supplied by the switching power supply to the ultrasound device's transmitting circuit is transmitted to the ultrasound device's transmitting circuit through the first path 12. The first path 12 has a relatively large on-resistance, and the transmission current transmitted through the first path 12 is relatively small, which meets the requirement of a smaller transmission current in normal imaging mode.

[0061] The shear wave path 13 is specifically used for shear wave imaging mode. Its input end is shared with the input end of the first path 12, and its output end is connected to the output end of the first path 12 to form a second connection point and directly connected to the transmitting circuit.

[0062] In shear wave imaging mode, shear wave path 13 is in the on state. The transmission current provided by the switching power supply to the transmitting circuit of the ultrasound device is transmitted to the transmitting circuit of the ultrasound device through shear wave path 13, providing a low-resistance path for the transmitting circuit. Its low-resistance characteristic ensures efficient signal transmission. The first path 12 is also conducting, but due to the high resistance of the first path 12, the transmission current provided by the switching power supply mainly passes through shear wave path 13 (a very small amount of current passes through the first path 12), which can efficiently transmit a large transmission current to meet the high-energy beam requirements of shear wave imaging. In conventional imaging mode, shear wave path 13 is controlled to be disconnected, and the first path 12 is the only power path. The conduction resistance of the first path 12 is relatively large, and the current transmitted in the first path 12 is small, which is suitable for the low current requirements of conventional imaging mode. This application ensures the flexibility and accuracy of output current in different imaging modes by keeping the first path 12 in the on state and controlling the shear wave path 13 to be either open or closed, thus achieving efficient current management.

[0063] As can be seen, in this embodiment, the entire selection circuit achieves optimized signal transmission under different imaging modes by dynamically controlling the on / off state of the shear wave path 13.

[0064] In a preferred embodiment, the first path 12 includes at least one resistive element, with its first end connected to a first connection point and its second end connected to a second connection point;

[0065] The shear wave path 13 includes a switching circuit, with its first end connected to a first connection point and its second end connected to a second connection point;

[0066] The switching circuit is configured to be in a closed state when the ultrasound equipment is operating in shear wave imaging mode and in a closed state when the ultrasound equipment is operating in conventional imaging mode. In this embodiment, the first path 12 may be implemented by, but is not limited to, at least one resistive element, and the shear wave path 13 may include, but is not limited to, a switching circuit.

[0067] When the ultrasound equipment operates in conventional imaging modes (such as standard PW and Color modes), the transmission circuit requires a relatively small transmission current. In this mode, the switching circuit in the shear wave path 13 is controlled to be in the off state, and the current can only be transmitted through the first path 12. Since the resistive element of the first path 12 has a relatively large limiting resistance value for current, its characteristics can effectively match the requirement of a small transmission current, while ensuring the stability and fast response of the transmission current in conventional imaging modes.

[0068] When the ultrasound equipment operates in shear wave imaging mode, the instantaneous transmission current required by the transmitting circuit is much higher than that of conventional imaging mode because it needs to excite human tissue and drive the propagation of shear waves. In this mode, the switching circuit in shear wave path 13 is controlled to be in the conducting state, forming a low-resistance, high-efficiency transmission path, so that the current is mainly transmitted to the transmitting circuit through shear wave path 13. At the same time, due to the low-resistance characteristics of shear wave path 13, the switching power supply can provide transient high current in a more efficient manner, meeting the high-energy beam requirements of shear wave imaging. At this time, the contribution of the first path 12 to the current is relatively small due to its high resistance characteristics, and can be ignored to a certain extent, thus avoiding energy loss or response speed reduction caused by excessive resistance.

[0069] As can be seen, this embodiment, through the coordinated operation of the resistive element of the first path 12 and the switching circuit of the shear wave path 13, can dynamically adapt to the emission current requirements of the ultrasound equipment in different imaging modes, ensuring the reliable operation and imaging quality of the ultrasound equipment in different imaging modes.

[0070] like Figure 4 As shown, in a preferred embodiment, the switching circuit includes:

[0071] The first controllable switch Q1 has its first end connected to the first connection point and its second end connected to the second connection point;

[0072] The first control circuit has its output terminal connected to the control terminal of the first controllable switch Q1.

[0073] The first control circuit is used to control the first controllable switch Q1 to be turned on when the ultrasound equipment is working in shear wave imaging mode and turned off when the ultrasound equipment is working in conventional imaging mode.

[0074] In this embodiment, the switching circuit can, but is not limited to, dynamically control and switch the signal transmission path between shear wave imaging mode and conventional imaging mode through a first controllable switch Q1 and a first control circuit. The specific workflow is as follows: When the ultrasound device enters shear wave imaging mode, the first control circuit sends a control signal according to the device's operating mode command, causing the first controllable switch Q1 to conduct. At this time, the shear wave imaging path is activated through the first controllable switch Q1, forming a low-resistance current transmission path. Because the shear wave imaging mode has extremely high transient current requirements for the switching power supply, the first controllable switch Q1 can meet the low-resistance requirement, efficiently transmitting the transmission current provided by the switching power supply to the transmitting circuit, thereby meeting the high-energy beam requirement of the shear wave imaging mode and optimizing the beam pushing effect.

[0075] When the ultrasound equipment switches to the conventional imaging mode, the first control circuit adjusts the output signal, causing the first controllable switch Q1 to open rapidly, and the shear wave imaging path is then shut down. At this time, current is transmitted only through the first path 12, and the high-resistance components in the first path 12 can well match the smaller transmission current required in the conventional imaging mode, while providing stable current transmission.

[0076] The first controllable switch Q1 is a switching transistor controlled by a voltage signal or a current signal. It can be, but is not limited to, a MOSFET, or other transistor components (such as IGBTs, triodes, thyristors, etc.), or relays, optocouplers, etc. This application does not limit the specific components.

[0077] As can be seen, this embodiment ensures an efficient current transmission path in shear wave imaging mode through the dynamic cooperation of the first control circuit and the first controllable switch Q1, while ensuring the stability and response speed of the system in conventional imaging mode, thereby further improving the performance of the ultrasound equipment in different imaging modes.

[0078] In a preferred embodiment, the first control circuit includes a second controllable switch Q2, a first resistor R1, and a second resistor R2;

[0079] The first end of the first resistor R1 is connected to the first connection point. The second end of the first resistor R1 is connected to the first end of the second resistor R2 and the control end of the first controllable switch Q1. The second end of the second resistor R2 is connected to the first end of the second controllable switch Q2. The second end of the second controllable switch Q2 is grounded. The control end of the second controllable switch Q2 serves as the input end of the first control circuit.

[0080] The second controllable switch Q2 is turned on when a first signal corresponding to the shear wave imaging mode is input to its control terminal, so as to turn on the first controllable switch Q1; and turned off when a second signal corresponding to the conventional imaging mode is input to its control terminal, so as to turn off the first controllable switch Q1.

[0081] In this embodiment, as Figure 4 As shown, the first control circuit can, but is not limited to, dynamically control the first controllable switch Q1 through the second controllable switch Q2, the first resistor R1, and the second resistor R2, thereby ensuring efficient switching of the signal transmission path between the ultrasound equipment in shear wave imaging mode and conventional imaging mode.

[0082] The specific workflow is as follows: When the ultrasound equipment enters the shear wave imaging mode, it inputs a first signal corresponding to this mode to the control terminal of the second controllable switch Q2. Upon receiving this signal, the second controllable switch Q2 quickly turns on, causing the series-connected resistor network (composed of the first resistor R1 and the second resistor R2) to form a specific bias voltage, thereby driving the first controllable switch Q1 to enter the conducting state. After the first controllable switch Q1 turns on, the shear wave imaging path is activated, and the transmission current provided by the switching power supply is directly transmitted to the transmitting circuit through a low-resistance path.

[0083] When the ultrasound equipment switches to the conventional imaging mode, the control terminal of the second controllable switch Q2 receives a second signal corresponding to this mode. Upon receiving the second signal, the second controllable switch Q2 quickly opens, thereby changing the bias state of the resistor network and turning off the first controllable switch Q1. At this time, the shear wave path 13 is cut off, and the current is transmitted entirely through the first path 12.

[0084] It should be understood that the selection circuit provided in this embodiment can be, but is not limited to, positioned between the positive output terminal of the switching power supply and the positive power supply terminal of the transmitting circuit, or between the negative output terminal of the switching power supply and the negative power supply terminal of the transmitting circuit. Regardless of which terminal it is positioned at, the principle of the first control circuit remains the same.

[0085] For example, in one specific embodiment, the first control circuit disposed between the positive output terminal of the switching power supply and the positive power supply terminal of the transmitting circuit is as follows: Figure 5 As shown, the first control circuit, located between the negative output terminal of the switching power supply and the negative power supply terminal of the transmitting circuit, is as follows: Figure 6 As shown. Figures 5-6 In this circuit, +HVB_IN is the positive input terminal of the selection circuit, which is connected to the positive output terminal of the switching power supply; +HVB is the positive output terminal of the selection circuit, which is connected to the positive power supply terminal of the transmitting circuit; -HVB_IN is the negative input terminal of the selection circuit, which is connected to the negative output terminal of the switching power supply; -HVB is the negative output terminal of the selection circuit, which is connected to the negative power supply terminal of the transmitting circuit.

[0086] The SW_SET signal represents the gating signal for entering a certain imaging mode, such as... Figure 5 As shown, when selecting the shear wave imaging mode, the ultrasound equipment first configures the voltage of the switching power supply to the voltage required for the shear wave imaging mode. Simultaneously, the newly added SW_SET signal is also configured to a high level (this high level is the first signal corresponding to the shear wave imaging mode). This circuit is active high. Figure 5 The second controllable switch Q2 in the circuit is turned on, which in turn causes Q1 to turn on. For example... Figure 6As shown, when selecting the conventional imaging mode, the ultrasound equipment first configures the voltage of the switching power supply to the voltage of the conventional imaging mode. Simultaneously with configuring the shear wave voltage, the newly added SW_SET signal is also configured to a low level (this low level is the second signal corresponding to the conventional imaging mode). This circuit is active high. Figure 6 The second controllable switch Q2 is turned off, thus turning off Q1.

[0087] It should be understood that the newly added configuration signal SW_SET in this embodiment is accompanied by the existing voltage configuration process. No new process is needed, and no delay is added. After receiving the configuration signal, the high-voltage circuit automatically switches the current path to adapt to the doctor's imaging mode selection.

[0088] Taking positive pressure as an example, refer to Figure 5 When the SW_SET signal is high (3.3V), this 3.3V voltage is connected to resistor Ra, causing transistor Q2 to saturate and conduct. The power supply network +HVB_IN is connected to GND through resistors R1 and R2. The voltage divider between R1 and R2 turns on Q1, enabling the shear wave imaging mode switch. When SW_SET is low, transistor Q2 is not conducting, and the gate of the MOSFET cannot be turned on without a voltage divider, thus exiting the shear wave imaging mode. The logic for negative voltage is the same and will not be elaborated further.

[0089] When the first controllable switch Q1 is implemented as a MOSFET, since the on-resistance of the MOSFET is generally in the milliohm range, compared to the resistor R in the first path 12 (which is generally in the range of a few ohms), Q1 is turned on in the shear wave imaging mode. At this time, almost all the current provided by the switching power supply flows through Q1, and only a small amount of current flows through the first path 12 (on the resistor R). In the conventional imaging mode, Q1 is turned off, and at this time, all the current provided by the switching power supply can only flow through the first path 12 (on the resistor R).

[0090] Furthermore, typically, an overcurrent protection circuit is provided across the resistor element R to prevent excessive current during normal imaging mode. Correspondingly, although this embodiment introduces a shear wave path 13 connected in parallel with the first path 12, and the value of the emission current flowing through the shear wave path 13 is relatively large, it will not falsely trigger the originally provided overcurrent protection circuit, for the following reasons:

[0091] In shear wave imaging mode, the emission current through shear wave path 13 is an instantaneous current, and when Q1 is specifically implemented as a MOSFET, its on-resistance is at the milliohm level. The voltage shared by Q1 acquired by the overcurrent protection circuit is small and will not reach the trigger value of the overcurrent protection circuit. Therefore, the situation of erroneous triggering of the overcurrent protection circuit in shear wave imaging mode can be avoided.

[0092] As a preferred embodiment, refer to Figure 3 It also includes:

[0093] The response circuit 11 has its input terminal connected to the first terminal of the capacitor to form a third connection point, and its output terminal connected to the input terminal of the first path 12 and the input terminal of the shear wave path 13 to form a fourth connection point.

[0094] The response circuit 11 is used to be in the on-circuit state when the ultrasonic equipment is working.

[0095] Specifically, since a rapid response of the transmitted current is required in any imaging mode under ultrasound imaging, this embodiment also includes a response circuit 11. Its function is to ensure that the transmitted current can rapidly respond to the needs of the ultrasound equipment in any imaging mode. The input terminal of the response circuit 11 is connected to the first terminal of the capacitor, and the output terminal is connected to both the input terminals of the first path 12 and the shear wave path 13, forming an additional rapid current transmission path.

[0096] The specific workflow is as follows: After the ultrasound equipment starts working, regardless of the imaging mode, the response circuit 11 will remain continuously conducting, serving as an efficient signal path to directly transmit the energy stored in the capacitor to subsequent circuits. Due to the conduction characteristics and direct connection layout of the response circuit 11, it can quickly respond to the equipment's demand for transient current, greatly shortening the time delay between the release of energy from the capacitor and the current entering the transmitting circuit.

[0097] In shear wave imaging mode, the response circuit 11 and the shear wave path 13 work together to ensure that transient high currents reach the transmitting circuit as quickly as possible, improving beam pushing efficiency and energy transfer capability. In conventional imaging mode, the response circuit 11 also works in conjunction with the first path 12 to provide a fast-response low-current path for the transmitting circuit, thereby meeting the requirements of conventional imaging mode for fast response and precise control.

[0098] In a preferred embodiment, the response circuit 11 includes a third controllable switch Q3 and a second control circuit;

[0099] The first terminal of the third controllable switch Q3 is connected to the third connection point, the second terminal of the third controllable switch Q3 is connected to the fourth connection point, and the control terminal of the third controllable switch Q3 is connected to the second control circuit.

[0100] The second control circuit is used to control the third controllable switch Q3 to be in the open state when the ultrasonic equipment is working.

[0101] In this embodiment, the response circuit 11 can, but is not limited to, achieve dynamic control of the rapid current response when the ultrasonic equipment is working through the third controllable switch Q3 and the second control circuit. Its working principle is as follows: the second control circuit continuously monitors whether the ultrasonic equipment is in working mode based on its operating status. Once the ultrasonic equipment starts working, the second control circuit sends a control signal to the third controllable switch Q3, driving it to enter the conducting state, forming an efficient current transmission path, and rapidly transmitting the energy of the capacitor to the input terminals of the first path 12 and the shear wave path 13.

[0102] The conduction state of the third controllable switch Q3 ensures that the response circuit 11 maintains a fast response capability in any imaging mode. When the ultrasound equipment switches to shear wave imaging mode, the third controllable switch Q3 works with the shear wave path 13 to provide a low-resistance path for transient high current demands; while in the normal imaging mode, the third controllable switch Q3 works in conjunction with the first path 12 to ensure a fast response capability under low current demands. Regardless of the mode, the presence of the third controllable switch Q3 effectively reduces transmission delay and improves the dynamic performance of the system.

[0103] Through this design, the response circuit 11 not only enhances the adaptability of the ultrasound equipment in high-energy and low-energy modes, but also significantly improves the system's switching and response speed to different modes, further optimizing the overall performance and imaging quality of the equipment.

[0104] In a preferred embodiment, the second control circuit includes an operational amplifier U, a third resistor R3, and a fourth resistor R4;

[0105] The first end of the third resistor R3 is connected to the fourth connection point. The second end of the third resistor R3 is connected to the first end of the fourth resistor R4 and the first input end of the operational amplifier U. The second end of the fourth resistor R4 is grounded. The second input end of the operational amplifier U receives the control voltage. The output end of the operational amplifier U is connected to the control end of the third controllable switch Q3.

[0106] The control voltage is the analog voltage corresponding to the digital control signal used to control the operation of the ultrasonic equipment.

[0107] In this preferred embodiment, the second control circuit, through the configuration of operational amplifier U, third resistor R3, and fourth resistor R4, achieves precise control of the third controllable switch Q3 to respond to different imaging modes of the ultrasound equipment. Operational amplifier U adjusts the control terminal of the third controllable switch Q3 in the circuit using the principles of virtual short and virtual open, ensuring that it can quickly conduct in any imaging mode.

[0108] The workflow is as follows: First, the two input terminals of operational amplifier U receive voltage signals from the circuit. The second input terminal of operational amplifier U receives a control voltage, which is an analog voltage converted from a digital control signal, representing the current operating state (i.e., whether it is operating in shear wave imaging mode or conventional imaging mode). Changes in the control voltage directly affect the output voltage of operational amplifier U, thereby adjusting the potential of the control terminal of the third controllable switch Q3. The first input terminal of operational amplifier U is connected to a voltage divider network composed of the third resistor R3 and the fourth resistor R4. This network feeds back the voltage signal at the fourth connection point to the first input terminal of operational amplifier U, thus affecting the output of operational amplifier U. According to the virtual short principle of operational amplifier U, when the potentials of the two input terminals are equal, operational amplifier U will adjust its output voltage to maintain this potential balance. At this time, through the virtual open principle, the voltage at the output terminal of operational amplifier U will form a suitable potential difference in the circuit, so that the control terminal of the third controllable switch Q3 will perform the correct switching action when the ultrasound equipment is working.

[0109] When the ultrasound equipment is working, the control voltage is a voltage signal that is greater than the first preset voltage. At this time, the operational amplifier U outputs a high level, so that the third controllable switch Q3 is turned on, thereby providing a fast response channel.

[0110] When the ultrasound equipment is not working, the control voltage is 0, which corresponds to a low level. In this case, the voltage received at the second input terminal of operational amplifier U is low. According to the virtual short principle, the potentials at the first and second input terminals of operational amplifier U are equal, and the output voltage will also decrease. This lowers the potential at the control terminal of the third controllable switch Q3, causing Q3 to turn off.

[0111] By utilizing the virtual short and virtual open principles of operational amplifier U, this control circuit can adjust the current path and magnitude in real time according to mode switching, achieving a fast and accurate response and ensuring the stability and reliability of the power supply under various operating modes.

[0112] As a preferred embodiment, it also includes:

[0113] A digital-to-analog converter, the output of which is connected to the second input of an operational amplifier U, and the input of which receives digital control signals;

[0114] The digital-to-analog converter is used to convert digital control signals into analog voltages.

[0115] In this preferred embodiment, the analog-to-digital converter (ADC) converts the digital control signals in the system into corresponding analog voltages for use by the operational amplifier U. The digital control signals typically originate from the control unit of the ultrasound equipment. These signals digitally represent the equipment's operating mode (e.g., digital control signal 1 for shear wave imaging mode and digital control signal 0 for conventional imaging mode). The ADC receives these digital signals and converts them into corresponding analog voltage outputs. This analog voltage is then input to the second input terminal of the operational amplifier U. After processing this analog voltage signal, the operational amplifier U outputs a voltage signal for controlling the third controllable switch Q3.

[0116] To solve the above-mentioned technical problems, this application also provides a transmitting power supply, including a switching power supply and two of the above-mentioned selection circuits;

[0117] The positive output terminal of the switching power supply is connected to the input terminal of the first selection circuit, and the output terminal of the first selection circuit is the positive output terminal of the transmitting power supply.

[0118] The negative output terminal of the switching power supply is connected to the input terminal of the second selection circuit, and the output terminal of the second selection circuit is the negative output terminal of the transmitting power supply.

[0119] In this embodiment, by introducing two selection circuits into the transmitting power supply to process the positive and negative output terminals of the switching power supply respectively, the dynamic optimization requirements for positive and negative current paths under different imaging modes are solved.

[0120] The specific principle is as follows: The positive output terminal of the switching power supply is connected to the first selection circuit. The first selection circuit dynamically switches the transmission path of the positive current according to the imaging mode. In the shear wave imaging mode, it provides a low-resistance path, and in the normal imaging mode, it switches to the first path, thereby optimizing the positive current transmission. The negative output terminal of the switching power supply achieves a similar dynamic switching function through the second selection circuit, optimizing the transmission path of the negative current.

[0121] With this dual-selection circuit design, the transmitting power supply can dynamically control the positive and negative current paths simultaneously, which not only meets the high current requirements of the shear wave imaging mode, but also ensures the requirements of fast response and stability in the conventional imaging mode, greatly improving the overall performance and efficiency of the system.

[0122] For a description of the transmitting power source, please refer to the above embodiments; this application will not repeat it here.

[0123] To solve the above-mentioned technical problems, this application also provides an ultrasonic device, including a transmitting circuit and the aforementioned transmitting power supply;

[0124] The positive output terminal of the transmitting power supply is connected to the positive power input terminal of the transmitting circuit.

[0125] The negative output terminal of the transmitting power supply is connected to the negative power input terminal of the transmitting circuit.

[0126] In this design, the ultrasound equipment is directly connected to the positive and negative power input terminals of the transmitting circuit through the transmitting power supply to form a complete power supply system to meet the current requirements of different imaging modes.

[0127] For further details regarding the ultrasonic equipment, please refer to the above embodiments; these will not be repeated here.

[0128] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0129] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A selection circuit, characterized in that, include: The capacitor has its first terminal connected to the output terminal of the switching power supply and its second terminal grounded. The first path is connected to the first terminal of the capacitor to form a first connection point; A shear wave path, the input end of which is connected to the first connection point, and the output end of which is connected to the output end of the first path to obtain a second connection point, the second connection point is also connected to the transmitting circuit of the ultrasound device; The shear wave path is configured to be in a connected state when the ultrasound device is operating in shear wave imaging mode, and in a disconnected state when the ultrasound device is operating in conventional imaging mode. The resistance of the shear wave path when it is conducting is much smaller than the resistance of the first path.

2. The selection circuit as described in claim 1, characterized in that, The first path includes at least one resistive element, with its first end connected to the first connection point and its second end connected to the second connection point; The shear wave path includes a switching circuit, with its first end connected to the first connection point and its second end connected to the second connection point; The switching circuit is configured to be in a closed state when the ultrasound device is operating in the shear wave imaging mode, and in a closed state when the ultrasound device is operating in the conventional imaging mode.

3. The selection circuit as described in claim 2, characterized in that, The switching circuit includes: A first controllable switch, wherein its first end is connected to the first connection point and its second end is connected to the second connection point; The first control circuit has its output terminal connected to the control terminal of the first controllable switch. The first control circuit is used to control the first controllable switch to be turned on when the ultrasound device is operating in the shear wave imaging mode, and to be turned off when the ultrasound device is operating in the conventional imaging mode.

4. The selection circuit as described in claim 3, characterized in that, The first control circuit includes a second controllable switch, a first resistor, and a second resistor; The first end of the first resistor is connected to the first connection point, the second end of the first resistor is connected to the first end of the second resistor and the control end of the first controllable switch, the second end of the second resistor is connected to the first end of the second controllable switch, the second end of the second controllable switch is grounded, and the control end of the second controllable switch serves as the input end of the first control circuit. The second controllable switch is turned on when a first signal corresponding to the shear wave imaging mode is input to its control terminal, so as to turn on the first controllable switch; and turned off when a second signal corresponding to the conventional imaging mode is input to its control terminal, so as to turn off the first controllable switch.

5. The selection circuit as described in any one of claims 1-4, characterized in that, Also includes: The response circuit has its input terminal connected to the first terminal of the capacitor to form a third connection point, and its output terminal connected to the input terminal of the first path and the input terminal of the shear wave path to form a fourth connection point. The response circuit is configured to be in a closed-circuit state when the ultrasound device is in operation.

6. The selection circuit as described in claim 5, characterized in that, The response circuit includes a third controllable switch and a second control circuit. The first end of the third controllable switch is connected to the third connection point, the second end of the third controllable switch is connected to the fourth connection point, and the control end of the third controllable switch is connected to the second control circuit. The second control circuit is used to control the third controllable switch to be in the open state when the ultrasonic equipment is working.

7. The selection circuit as described in claim 6, characterized in that, The second control circuit includes an operational amplifier, a third resistor, and a fourth resistor; The first end of the third resistor is connected to the fourth connection point, the second end of the third resistor is connected to the first end of the fourth resistor and the first input end of the operational amplifier, the second end of the fourth resistor is grounded, the second input end of the operational amplifier receives a control voltage, and the output end of the operational amplifier is connected to the control end of the third controllable switch. The control voltage is the analog voltage corresponding to the digital control signal used to control the operation of the ultrasonic device.

8. The selection circuit as described in claim 7, characterized in that, Also includes: A digital-to-analog converter, the output of which is connected to the second input of the operational amplifier, and the digital control signal is input to its input. The digital-to-analog converter is used to convert the digital control signal into the analog voltage.

9. A transmitting power source, characterized in that, Includes a switching power supply and two selection circuits as described in any one of claims 1-8; The positive output terminal of the switching power supply is connected to the input terminal of the first selection circuit, and the output terminal of the first selection circuit is the positive output terminal of the transmitting power supply. The negative output terminal of the switching power supply is connected to the input terminal of the second selection circuit, and the output terminal of the second selection circuit is the negative output terminal of the transmitting power supply.

10. An ultrasonic device, characterized in that, Includes a transmitting circuit and a transmitting power supply as described in claim 9; The positive output terminal of the transmitting power supply is connected to the positive power input terminal of the transmitting circuit. The negative output terminal of the transmitting power supply is connected to the negative power input terminal of the transmitting circuit.

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