A power supply system and an ultrasonic diagnostic apparatus

Abstract

The application discloses a power supply system and an ultrasonic diagnostic equipment, and is applied to the field of power supply. The monitoring circuit in the scheme can monitor the output voltage of the battery, and when the output voltage is not in the preset range, the battery is controlled to stop supplying power for the ultrasonic main system and to continue for a preset time period. It can be seen that in the application, when the output voltage of the battery is not in the preset range, the battery is controlled to stop supplying power for the ultrasonic main system, and the battery is controlled to continue to stop supplying power for the ultrasonic main system for a preset time period, so that the ultrasonic main system continues to stop working for the preset time period, the situation that the ultrasonic main system frequently restarts due to the recovery of the output voltage when the battery power is insufficient can be avoided, and the safety of the battery and the ultrasonic main system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power supply, in particular to a power supply system and an ultrasonic diagnostic device. BACKGROUND

[0002] At present, the ultrasonic main system is powered by commercial power or a battery. The commercial power or the battery first outputs a 5V power supply to a standby power supply end of a mainboard in the ultrasonic main system. At this time, the mainboard in the ultrasonic main system is in a standby state, and only a small amount of circuit in the mainboard works, and the power consumption is low. After the mainboard identifies that the power-on key of the ultrasonic main system is pressed, an power-on signal is output to a power supply module. At this time, the commercial power or the battery outputs a 12V power supply to a power supply end in the ultrasonic main system through the power supply module, so that the ultrasonic main system works normally, and a feedback signal is also output to the mainboard. After the mainboard detects the feedback signal, the normal working mode is started.

[0003] However, when the battery is used to power the ultrasonic main system, if the battery has insufficient power, the voltage across the battery will gradually decrease, and when the voltage decreases to the power supply voltage (such as 12V) of the ultrasonic main system, the battery is disconnected from the power supply end of the ultrasonic main system, the ultrasonic main system abnormally powers off, and then the voltage across the battery will increase slightly, and may rise to the power supply voltage of the ultrasonic main system. At this time, the ultrasonic main system is started again, and after the start, the voltage across the battery decreases again, and the ultrasonic main system is repeatedly started, which leads to low reliability of the battery and the ultrasonic main system. SUMMARY

[0004] The purpose of the present application is to provide a power supply system and an ultrasonic diagnostic device, which controls the battery to stop supplying power to the ultrasonic main system when the output voltage of the battery is not in the preset range, and controls the battery to continuously stop supplying power to the ultrasonic main system for a preset time period, so that the ultrasonic main system continuously stops working for a preset time period, which can avoid the situation that the ultrasonic main system is frequently restarted due to the rise of the output voltage when the battery has insufficient power, and improves the safety of the battery and the ultrasonic main system.

[0005] To solve the above technical problems, the present application provides a power supply system, which comprises:

[0006] A monitoring circuit, comprising a first input end and an output end, the first input end is connected with the output end of the battery, and the output end is connected with the power supply end of the ultrasonic main system, the monitoring circuit is used for monitoring the output voltage of the battery, and when the output voltage is not in the preset range, the monitoring circuit controls the battery to stop supplying power to the ultrasonic main system and continuously for a preset time period.

[0007] Preferably, the monitoring circuit comprises:

[0008] a sampling circuit, an input end of which is connected with an output end of the battery as an input end of the monitoring circuit, the sampling circuit being configured to sample an output voltage of the battery to obtain a sampling voltage;

[0009] a comparison module, comprising a first input end and a second input end, the first input end of the comparison module being connected with an output end of the sampling circuit, the second input end of the comparison module being configured to input a reference voltage, the comparison module being configured to compare the sampling voltage with the reference voltage and output a first signal and last for a preset time period when the sampling voltage is less than the reference voltage;

[0010] a first switch circuit, comprising a first input end and an output end, the first input end of the first switch circuit being connected with an output end of the comparison module, the output end of the first switch circuit being connected with a power supply end of the ultrasonic main system as an output end of the monitoring circuit, the first switch circuit being configured to be cut off when the first signal is received so as to stop the battery from outputting power supply to the power supply end of the ultrasonic main system to stop supplying power to the ultrasonic main system.

[0011] Preferably, the comparison module comprises:

[0012] a comparator, comprising a first input end and a second input end, the first input end of the comparator being connected with an output end of the sampling circuit as the first input end of the comparison module, the second input end of the comparator being connected with the reference voltage as the second input end of the comparison module, the comparator being configured to output a second signal when the sampling voltage is less than the reference voltage;

[0013] a second switch circuit, an input end of which is connected with an output end of the comparator, an output end of which is connected with the first input end of the first switch circuit as an output end of the comparison module, the second switch circuit being configured to convert the second signal into the first signal and output the first signal for the preset time period.

[0014] Preferably, the comparison module further comprises a sixth resistor and a first diode.

[0015] one end of the sixth resistor is connected with an output end of the comparator, the other end of the sixth resistor is connected with an anode of the first diode, a cathode of the first diode is connected with the second input end of the comparator.

[0016] Preferably, the monitoring circuit further comprises:

[0017] a reference circuit, an input end of which is connected with an output end of the battery, an output end of which is connected with the second input end of the comparator, the reference circuit being configured to output the reference voltage according to the output voltage of the battery.

[0018] Preferably, the reference circuit comprises a first resistor, a second resistor, a third resistor and a first voltage stabilizer;

[0019] The first end of the first resistor is connected with the output end of the battery as the input end of the reference circuit, the second end of the first resistor is connected with the cathode of the first voltage stabilizer, the voltage stabilizing end and the first end of the second resistor respectively, the second end of the second resistor is connected with the first end of the third resistor and the second input end of the comparator as the output end of the reference circuit respectively, and the second end of the third resistor is connected with the anode of the first voltage stabilizer and the ground end respectively.

[0020] Preferably, the monitoring circuit further comprises a second input end, and the second input end is connected with the signal end of the ultrasonic main system;

[0021] The monitoring circuit is further configured to control the battery to supply power to the ultrasonic main system when the output voltage of the battery is within the preset range and the signal end outputs the power-on signal.

[0022] Preferably, the power supply end of the ultrasonic main system comprises a standby power supply end and a power supply end;

[0023] The power supply system further comprises:

[0024] The power conversion module comprises an input end, a first enable end, a second enable end, a first output end and a second output end, the input end of the power conversion module is connected with the output end of the battery, the first enable end is connected with the output end of the second switch circuit, the second enable end is connected with the enable end of the first switch circuit, the first output end is connected with the standby power supply end of the ultrasonic main system, and the second output end is connected with the power supply end of the ultrasonic main system.

[0025] The power conversion module is configured to output standby power to the standby power supply end of the ultrasonic main system through the first output end when the first enable end does not receive the first signal, and output power supply to the power supply end of the ultrasonic main system through the second output end when the second enable end detects that the first switch circuit is turned on.

[0026] Preferably, the first switch circuit further comprises a second input end connected with the signal end of the ultrasonic main system;

[0027] The first switch circuit is specifically configured to be cut off when the first input end receives the first signal or the second input end does not receive the power-on signal, so that the power conversion module stops outputting power supply to the power supply end of the ultrasonic main system through the second output end.

[0028] Preferably, the second switch circuit comprises a first controllable switch, a second controllable switch, a third controllable switch and a delay circuit;

[0029] The control end of the first controllable switch is connected with the first end of the second controllable switch, the first end of the first controllable switch is connected with the output end of the battery, the second end of the first controllable switch is connected with one end of the delay circuit, the other end of the delay circuit is connected with the control end of the third controllable switch, the first end of the third controllable switch is connected with the first enable end of the power conversion module as the output end of the second switch circuit, the second end of the third controllable switch is connected with the second end and the ground end of the second controllable switch respectively, and the control end of the second controllable switch is connected with the output end of the comparator as the input end of the second switch circuit.

[0030] The second controllable switch is used for being turned on after receiving the second signal.

[0031] The first controllable switch is used for being turned on after the second controllable switch is turned on.

[0032] The third controllable switch is used for being turned on after the first controllable switch is turned on, so as to output the first signal, so that the first enable end is not enabled, the power conversion module stops outputting standby power to the standby power end, and is cut off after the preset time period.

[0033] The delay circuit is used for generating a delay of the preset time period after the third controllable switch is actuated.

[0034] Preferably, the delay circuit comprises a first capacitor, a ninth resistor and a tenth resistor.

[0035] One end of the first capacitor is connected with the second end of the first controllable switch and the first end of the ninth resistor respectively, the second end of the ninth resistor is connected with the first end of the tenth resistor and the control end of the third controllable switch respectively, and the other end of the first capacitor is connected with the second end of the tenth resistor and the ground end respectively.

[0036] Preferably, the first switch circuit comprises an optical coupler, a fourth resistor and a fifth resistor.

[0037] The anode of the diode in the optocoupler is connected with the first input end of the first switch circuit and the output end of the second switch circuit, the cathode of the diode in the optocoupler is connected with the signal end of the ultrasonic main system, one end of the transistor in the optocoupler is connected with the second end of the fourth resistor, the first end of the fifth resistor and the second enable end of the power conversion module as the output end of the first switch circuit, the first end of the fourth resistor is connected with the output end of the battery, and the other end of the transistor is connected with the second end of the fifth resistor, the cathode of the diode and the ground end.

[0038] To solve the above technical problems, the application further provides an ultrasonic diagnostic device, comprising the power supply system.

[0039] To solve the above technical problems, the application further provides a power supply system and an ultrasonic diagnostic device, which are applied to the field of power supply. The monitoring circuit in the scheme can monitor the output voltage of the battery, and control the battery to stop supplying power to the ultrasonic main system and continue for a preset time period when the output voltage is not in the preset range. It can be seen that, in the application, the battery is controlled to stop supplying power to the ultrasonic main system when the output voltage of the battery is not in the preset range, and the battery is controlled to continue to stop supplying power to the ultrasonic main system for a preset time period, so that the ultrasonic main system continues to stop working for a preset time period, which can avoid the situation that the ultrasonic main system frequently restarts due to the recovery of the output voltage when the battery power is insufficient, and improves the safety of the battery and the ultrasonic main system. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0041] Figure 1 A structural block diagram of the power supply system provided by the application;

[0042] Figure 2 A specific structural block diagram of the power supply system provided by the application;

[0043] Figure 3 A partial circuit diagram of the power supply system provided by the application;

[0044] Figure 4 Another partial circuit diagram of the power supply system provided by the application;

[0045] Figure 5A structural block diagram of an ultrasonic diagnostic equipment provided in the application. DETAILED DESCRIPTION

[0046] The core of the application is to provide a power supply system and an ultrasonic diagnostic equipment, when the output voltage of the battery is not in the preset range, the battery is controlled to stop supplying power to the ultrasonic main system, and the battery is controlled to continuously stop supplying power to the ultrasonic main system for a preset time period, so that the ultrasonic main system continuously stops working for a preset time period, which can avoid the situation that when the battery power is insufficient, the ultrasonic main system frequently restarts due to the recovery of the output voltage, and improves the safety of the battery and the ultrasonic main system.

[0047] To make the purpose, technical solutions and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are some embodiments of the application, not all embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.

[0048] Please refer to Figure 1 , Figure 1 A structural block diagram of a power supply system provided in the application, the system comprises:

[0049] The monitoring circuit 11 comprises a first input end and an output end, the first input end is connected with the output end of the battery, and the output end is connected with the power supply end of the ultrasonic main system. The monitoring circuit 11 is used for monitoring the output voltage of the battery, and when the output voltage is not in the preset range, the battery is controlled to stop supplying power to the ultrasonic main system for a preset time period.

[0050] Specifically, in the application, when the battery is used to supply power to the ultrasonic main system, the monitoring circuit 11 is arranged in the monitoring system. The battery is no longer directly used to supply power to the ultrasonic main system, but is monitored by the monitoring circuit 11 whether to output the supply voltage, so as to control whether the battery supplies power to the ultrasonic main system.

[0051] Specifically, the monitoring circuit in the application detects the output voltage of the battery, and determines that the output voltage of the battery is abnormal and cannot normally supply power to the ultrasonic main system when the output voltage of the battery is not in the preset range. At this time, the battery is controlled to stop outputting the supply voltage, so that the battery stops supplying power to the ultrasonic main system. It needs to be particularly pointed out that in the application, when the output voltage of the battery is not in the preset range, the specific implementation mode of controlling the battery to stop supplying power to the ultrasonic main system is to control the battery to stop supplying power to the ultrasonic main system for a preset period of time, so that in the case of insufficient battery power, even if the output voltage of the battery rises slightly or greatly after the ultrasonic main system is powered off, the ultrasonic main system will not be powered within the preset period of time, which can avoid the situation that the ultrasonic main system is restarted repeatedly, reduce the probability of over-discharge of the battery caused by the continuous restart of the ultrasonic main system, and increase the service life and reliability of the battery.

[0052] In addition, in a specific embodiment, the output voltage not in the preset range described above specifically means that the output voltage is less than the reference voltage.

[0053] In summary, the power supply system provided by the application directly controls the battery to stop supplying power to the ultrasonic main system when the output voltage of the battery is not in the preset range or the ultrasonic main system is not allowed to start, so that the ultrasonic main system stops working, which can prevent the situation that the ultrasonic main system is frequently restarted, and improves the safety of the battery and the ultrasonic main system.

[0054] As a preferred embodiment, the monitoring circuit 11 further comprises a second input end, and the second input end is connected with the signal end of the ultrasonic main system.

[0055] The monitoring circuit 11 is further used to control the battery to supply power to the ultrasonic main system when the output voltage of the battery is in the preset range and the start signal PS_ON is output from the signal end.

[0056] Specifically, in addition to detecting the output voltage of the battery, the monitoring circuit in the application can also detect the signal output from the signal end of the ultrasonic main system, and control the battery to supply power to the ultrasonic main system when the start signal PS_ON is output from the signal end and the output voltage of the battery is in the preset range. When any one of the two conditions monitored by the above monitoring circuit does not meet the condition, the battery is controlled to stop supplying power to the ultrasonic main system. Specifically, when the start signal PS_ON is not output from the signal end, the battery is directly controlled to stop supplying power to the ultrasonic main system, and when the output voltage of the battery is not in the preset range, the battery is controlled to stop supplying power to the ultrasonic main system for a preset period of time.

[0057] The signal end of the ultrasonic main system in the application can be but is not limited to a power-on signal PS_ON output by a signal end of a mainboard in the ultrasonic main system. Specifically, a power-on key can be but is not limited to arranged on a control panel of the ultrasonic main system. When the power-on key is not pressed, the mainboard is in a standby state (the mainboard is powered by a 5V power supply). After the power-on key is pressed, the mainboard detects that the power-on key is pressed. At this time, the mainboard outputs the power-on signal PS_ON through the signal end. At this time, if the output voltage of the battery is within the preset range, the battery starts to provide a power supply voltage (12V) for the ultrasonic main system, and the ultrasonic main system starts. Similarly, when the monitoring circuit does not monitor the power-on signal PS_ON, even if the output voltage of the battery is within the preset range, the ultrasonic main system will not start, thereby improving the reliability of power supply of the ultrasonic main system.

[0058] On the basis of the above embodiment:

[0059] As a preferred embodiment, the monitoring circuit 11 comprises:

[0060] a sampling circuit 21, an input end of the sampling circuit 21 being connected with an output end of the battery as an input end of the monitoring circuit 11, the sampling circuit 21 being configured to sample the output voltage of the battery to obtain a sampling voltage;

[0061] a comparison module, the comparison module comprising a first input end and a second input end, the first input end of the comparison module being connected with an output end of the sampling circuit, the second input end of the comparison module being configured to input a reference voltage, the comparison module being configured to compare the sampling voltage with the reference voltage, and output a first signal and last for a preset time period when the sampling voltage is less than the reference voltage;

[0062] a first switch circuit 25, the first switch circuit 25 comprising a first input end and an output end, the first input end of the first switch circuit 25 being connected with an output end of the comparison module, the output end of the first switch circuit 25 being connected with a power supply end of the ultrasonic main system as an output end of the monitoring circuit 11, the first switch circuit 25 being configured to be cut off when the first signal is received, so that the battery stops outputting the power supply to the power supply end of the ultrasonic main system, and the power supply of the ultrasonic main system is stopped.

[0063] The input end of the sampling circuit 21 constitutes an input end of the entire monitoring circuit 11, and the output end of the first switch circuit 25 constitutes an output end of the entire monitoring circuit 11.

[0064] Further, the embodiment aims to define the specific implementation of the monitoring circuit 11, since the output voltage of the battery needs to be monitored, a sampling circuit 21 is arranged in the embodiment to sample the output voltage of the battery to obtain a sampling voltage. Further, since it is also needed in the application to determine whether the output voltage of the battery is within the preset range, a comparison module is also arranged in the embodiment to compare the sampling voltage output by the sampling circuit 21 with the reference voltage, at this time, the specific implementation of determining whether the output voltage of the battery is within the preset range is to determine whether the sampling voltage is not less than the reference voltage, specifically, when the sampling voltage is less than the reference voltage, it is determined that the output voltage of the battery is not within the preset range, at this time, the first signal is output to the first switching circuit 25, and the first signal is continuously output within the preset time period, so that the first switching circuit 25 controls the battery to stop supplying power to the ultrasonic main system based on the first signal and the power-on signal PS_ON, so that the ultrasonic main system is powered off.

[0065] It should be noted that the specific implementation of the first switching circuit 25 and the comparison module described above can be a chip or a single-chip microcomputer, or other implementation manners, which are not particularly limited in the application.

[0066] Please refer to Figure 3 , Figure 3 for part of the circuit diagram of the power supply system provided by the application.

[0067] As a preferred embodiment, the sampling circuit 21 comprises a seventh resistor R7 and an eighth resistor R8.

[0068] The first end of the seventh resistor R7 is connected with the output end of the battery as the input end of the sampling circuit 21, the second end of the seventh resistor R7 is connected with the first end of the eighth resistor R8, the second end of the eighth resistor R8 is grounded, and the second end of the seventh resistor R7 is the output end of the sampling circuit 21.

[0069] Specifically, the sampling circuit 21 described above can be but is not limited to a voltage dividing circuit composed of resistors, further, the seventh resistor R7 can but is not limited to comprise two resistors, at this time, it is more convenient to adjust the resistance value of the seventh resistor R7 by adjusting the resistance values of the two resistors, for example, in actual application, if the types of resistors (resistance types) are limited, it is easier to adjust the resistance value of the seventh resistor R7 by using two resistors.

[0070] As a preferred embodiment, the monitoring circuit 11 further comprises:

[0071] The reference circuit 22 is connected with the output end of the battery as the input end, and is connected with the second end of the comparator 23 as the output end, and the reference circuit 22 is used to output the reference voltage according to the output voltage of the battery.

[0072] Further, the reference voltage mentioned above can be but is not limited to the reference voltage output by the reference circuit 22, and the reference voltage output by the reference circuit 22 can be set according to the user's demand, that is, the reference voltage output by the reference circuit 22 in the present application can be adjusted according to the user's demand. Specifically, assuming that the power supply voltage of the ultrasonic main system in the present application is 12V, the reference voltage can be but is not limited to 12V or 13.5V slightly higher than 12V, and the present application does not specifically limit it here.

[0073] As a preferred embodiment, the reference circuit 22 includes a first resistor R1, a second resistor R2, a third resistor R3 and a first voltage stabilizing tube U1.

[0074] The first end of the first resistor R1 is connected to the output end of the battery as the input end of the reference circuit 22, the second end of the first resistor R1 is connected to the cathode of the first voltage stabilizing tube U1, the voltage stabilizing end and the first end of the second resistor R2 respectively, the second end of the second resistor R2 is connected to the first end of the third resistor R3 and the second end of the comparison module as the output end of the reference circuit 22, and the second end of the third resistor R3 is connected to the anode of the first voltage stabilizing tube U1 and the ground end respectively.

[0075] Further, the reference circuit 22 mentioned above can be but is not limited to a 431 voltage stabilizing circuit. Specifically, the 431 voltage stabilizing circuit specifically includes a first resistor R1, a second resistor R2, a third resistor R3 and a first voltage stabilizing tube U1. A stable voltage is output at the second end of the second resistor R2 through resistance voltage division and voltage stabilizing tube voltage stabilizing, as a reference voltage. Since the voltage stabilizing tube has the function of voltage stabilizing, the stability of the reference voltage output in the present embodiment is higher than that of the reference voltage output by the circuit using only resistance voltage division, thereby improving the accuracy of the judgment on the output voltage of the battery in the present embodiment.

[0076] Of course, the specific implementation mode of the reference circuit 22 can also be other implementation modes, which are not specifically limited herein.

[0077] It can be seen that when the monitoring circuit 11 includes the sampling circuit 21, the comparison module and the first switching circuit 25, the functions of the monitoring circuit 11 mentioned above can be realized, and the implementation mode is simple and reliable.

[0078] As a preferred embodiment, the comparison module includes:

[0079] The comparator 23( Figure 3a comparator 23, the comparator 23 having a first input end and a second input end, the first input end of the comparator 23 being connected with the output end of the sampling circuit 21 as the first input end of the comparison module, the second input end of the comparator 23 being connected with the output end of the comparator 23 as the second input end of the comparison module and inputting the reference voltage, the comparator 23 being configured to output a second signal when the sampling voltage is less than the reference voltage;

[0080] a second switch circuit 24, the input end of the second switch circuit 24 being connected with the output end of the comparator 23, the output end of the second switch circuit 24 being connected with the first end of the first switch circuit 25 as the output end of the comparison module, the second switch circuit 24 being configured to convert the second signal into the first signal and output the first signal continuously within the preset time period.

[0081] Specifically, the embodiment aims to define the specific implementation of the comparison module, specifically, the comparison module can but is not limited to comprising the comparator 23 and the second switch circuit 24, wherein the comparator 23 is configured to output a second signal according to the magnitude between the voltages of the two input ends (the second signal can but is not limited to being a level signal), and the second switch circuit 24 is configured to determine whether to output the first signal according to the signal output by the comparator 23, specifically, when the comparator 23 outputs the second signal, the second switch circuit 24 converts the second signal into the first signal and outputs the first signal continuously within a preset time.

[0082] Specifically, when the voltage at the positive input end of the comparator 23 is greater than the voltage at the negative input end, the comparator 23 outputs a high level; when the voltage at the negative input end of the comparator 23 is less than the voltage at the positive input end, the comparator 23 outputs a low level. Without limiting whether the first end of the comparator 23 is the positive end or the negative end, as long as the second switch circuit 24 can convert the level signal output by the comparator 23 into the first signal.

[0083] In a specific embodiment, the first end of the comparator 23 is the negative input end, at this time, correspondingly, the second signal is a high level, that is, the second switch circuit 24 is specifically configured to convert the high level into the first signal and output the first signal continuously within a preset time period, and the first signal here can but is not limited to being a level signal.

[0084] In summary, the comparator 23 and the second switch circuit 24 in the embodiment can realize the function of the comparison module described above, and the implementation is simple and reliable.

[0085] As a preferred embodiment, the comparison module further comprises a sixth resistor R6 and a first diode;

[0086] One end of the sixth resistor R6 is connected with the output end of the comparator 23, the other end of the sixth resistor R6 is connected with the anode of the first diode, and the cathode of the first diode is connected with the second end of the comparator 23.

[0087] Further, the comparison module in the application further comprises a feedback module. Specifically, the feedback module comprises a sixth resistor R6 and a first diode, and the output voltage of the comparator 23 is fed back to the second end of the comparator 23. Since the second end of the comparator 23 is connected to the output end of the reference circuit 22, the feedback module functions to feed back the second signal output by the comparator 23 to the input end of the comparator 23, so as to increase the value of the reference voltage input to the second end of the comparator 23. The increased part corresponds to a hysteresis voltage, so that during the recovery of the output voltage of the battery, the comparator 23 can be prevented from working in the state of alternating high and low levels.

[0088] Specifically, it is assumed that the first end of the comparator 23 is the input negative end, and the second end of the comparator 23 is the input positive end. At this time, the second signal is a high level, and the high level is fed back to the input positive end of the comparator 23, so that the voltage of the input positive end of the comparator 23 can be increased to a certain extent, so that when the voltage between the input positive end and the input negative end of the comparator 23 is compared, the comparator 23 can be prevented from working in the state of alternating high and low levels.

[0089] As a preferred embodiment, the power supply end of the ultrasonic main system comprises a standby power supply end and a power supply end.

[0090] The power supply system further comprises:

[0091] The power conversion module 26 comprises an input end, a first enable end, a second enable end, a first output end and a second output end. The input end of the power conversion module 26 is connected to the output end of the battery, the first enable end is connected to the output end of the second switch circuit 24, the second enable end is connected to the enable end of the first switch circuit 25, the first output end of the power conversion module 26 is connected to the standby power supply end of the ultrasonic main system, and the second output end of the power conversion module 26 is connected to the power supply end of the ultrasonic main system.

[0092] The power conversion module 26 is configured to output the standby power to the standby power supply end of the ultrasonic main system through the first output end of the power conversion module 26 when the first enable end of the power conversion module 26 does not receive the first signal, and output the power supply to the power supply end of the ultrasonic main system through the second output end of the power conversion module 26 when the second enable end of the power conversion module 26 detects that the first switch circuit 25 is turned on.

[0093] Specifically, the battery in the application provides power supply for the ultrasonic main system, specifically provides two power supplies, standby power supply and power supply (the standby power supply can be 5V, and the power supply can be 12V), at this time, the application sets a power conversion module 26, which is used to convert the output voltage of the battery to provide standby power (5V) and power supply (12V) for the ultrasonic main system. At this time, the specific implementation of controlling whether the battery provides power supply for the ultrasonic main system is to control the first enable end of the power conversion module 26 to control whether the battery provides standby power for the standby power supply end of the ultrasonic main system, and to control the second enable end of the power conversion module 26 to control whether the battery provides power supply for the power supply end of the ultrasonic main system.

[0094] Specifically, the power conversion module 26 will output standby power to the standby power supply end through the first output end only when the first enable end does not receive the first signal output by the second switch circuit 24, and will output power supply to the power supply end through the second output end only when the second enable end detects that the first switch circuit 25 is turned on. Therefore, whether the power conversion module 26 outputs standby power can be controlled by controlling whether the second switch circuit 24 outputs the first signal, and whether the power conversion module 26 outputs power supply can be controlled by controlling whether the first switch circuit is turned on.

[0095] As a preferred embodiment, the first switch circuit 25 further includes a second input end connected with the signal end of the ultrasonic main system;

[0096] The first switch circuit 25 is specifically used to cut off when the first input end of the first switch circuit 25 receives the first signal or the second input end of the first switch circuit 25 does not receive the power-on signal PS_ON, so that the power conversion module 26 stops outputting power supply (12V) to the power supply end of the ultrasonic main system through the second output end.

[0097] Further, in the above-mentioned first switch circuit 25, the second input end of the first switch circuit 25 is connected with the signal end of the ultrasonic main system, and the first switch circuit 25 only controls the battery to supply power to the ultrasonic main system when the first input end of the first switch circuit 25 does not receive the first signal output by the second switch circuit 24 and the second input end receives the power-on signal PS_ON output by the signal end of the ultrasonic main system. When the first input end receives the first signal output by the second switch circuit 24 or the second input end does not receive the power-on signal PS_ON, the battery is controlled to stop supplying power to the ultrasonic main system.

[0098] It can be seen that the ultrasonic main system in the application can only input power supply to the power supply end when the standby power supply end already has standby power input and the power-on signal is detected.

[0099] In a specific embodiment, if the sampling voltage is less than the reference voltage (i.e., the output voltage of the battery is not in the preset range), the second switch circuit outputs the first signal, at this time, the first enable end of the power conversion module 26 receives the first signal, and the first input end of the first switch circuit 25 also receives the first signal, and the first switch circuit 25 is in the off state. At this time, the power conversion module 26 does not output standby power to the standby power end of the ultrasonic main system, nor does it output power supply to the power supply end of the ultrasonic main system, so as to make the ultrasonic main system power off. If the sampling voltage is not less than the reference voltage (i.e., the output voltage of the battery is in the preset range), the second switch circuit does not output the first signal, at this time, the first enable end of the power conversion module 26 does not receive the first signal, and the first input end of the first switch circuit 25 also does not receive the first signal, and the first switch circuit 25 is in the on state, at this time, the power conversion module 26 outputs standby power to the standby power end of the ultrasonic main system, and also outputs power supply to the power supply end of the ultrasonic main system, so as to make the ultrasonic main system power on.

[0100] As a preferred embodiment, the second switch circuit 24 of the ultrasonic main system includes a first controllable switch Q1, a second controllable switch Q2, a third controllable switch Q3, and a delay circuit;

[0101] The control end of the first controllable switch Q1 is connected with the first end of the second controllable switch Q2, the first end of the first controllable switch Q1 is connected with the output end of the battery, the second end of the first controllable switch Q1 is connected with one end of the delay circuit, the other end of the delay circuit is connected with the control end of the third controllable switch Q3, the first end of the third controllable switch Q3 as the output end of the second switch circuit 24 is connected with the first enable end of the power conversion module 26, the second end of the third controllable switch Q3 is connected with the second end and the ground end of the second controllable switch Q2 respectively, and the control end of the second controllable switch Q2 as the input end of the second switch circuit 24 is connected with the output end of the comparator 23;

[0102] The second controllable switch Q2 is used to be turned on when receiving the second signal;

[0103] The first controllable switch Q1 is used to be turned on after the second controllable switch Q2 is turned on;

[0104] The third controllable switch Q3 is used to be turned on after the first controllable switch Q1 is turned on, to output the first signal, so that the first enable end is not enabled, the power conversion module 26 stops outputting standby power to the standby power end, and is turned off after a preset time period;

[0105] The delay circuit is used to generate a delay of a preset time period after the third controllable switch Q3 is actuated.

[0106] Specifically, when the output voltage of the battery does not meet the requirement, i.e. the sampling voltage is less than the reference voltage, the comparator 23 outputs the second signal, at this time, the first controllable switch Q1, the second controllable switch Q2 and the third controllable switch Q3 in the second switch circuit 24 output the first signal based on the second signal, so that the first enable end is not enabled (the enable signal of the first enable end is 5VSB_EN in Figure 3 , at this time Figure 3 , 5VSB_EN is low), so that the power conversion module 26 stops outputting the standby power to the standby power end of the ultrasonic main system, and the delay circuit makes the first enable end continuously not enabled within a preset time period, at this time, the standby power end continuously has no standby power input within the preset time period. Since the second switch circuit 24 continuously outputs the first signal within the preset time period, within the preset time period, no matter whether the first switch circuit 25 receives the power-on signal PS_ON, the first switch circuit 25 will not be turned on, i.e. the power conversion module 26 will not provide the power supply to the power supply end of the ultrasonic main system through the second output end within the preset time period (the enable signal of the second enable end is 12VSB_EN in Figure 4 , at this time Figure 4 , 12VSB_EN is high).

[0107] Specifically, when the output voltage of the battery meets the requirement, i.e. the sampling voltage is not less than the reference voltage, the comparator 23 outputs the signal opposite to the second signal, i.e. does not output the second signal, at this time, the first controllable switch Q1, the second controllable switch Q2 and the third controllable switch Q3 in the second switch circuit 24 output the signal opposite to the first signal, i.e. do not output the first signal, so that the first enable end of the power conversion module 26 is enabled (at this time, Figure 3 , 5VSB_EN is high), at this time, the power conversion module 26 outputs the standby power to the standby power end of the ultrasonic main system through the first output end, at this time, if the first switch circuit 25 still receives the power-on signal PS_ON, the first switch circuit 25 is turned on, and the power conversion module 26 outputs the power supply to the power supply end of the ultrasonic main system through the second output end of itself.

[0108] In a specific embodiment, if the signal end described above is the signal end of the mainboard in the ultrasound main system, the standby power end here can be the standby power end of the mainboard. Similarly, the first output end of the power conversion module 26 is connected to the standby power end of the mainboard. At this time, the mainboard can only be in standby mode when there is standby power input at the standby power end of the mainboard. At this time, a small amount of circuits in the mainboard are working and can detect whether the power button is pressed. Specifically, when the power button is pressed, the mainboard outputs the power-on signal PS_ON through its own signal end. At this time, the first switch circuit 25 receives the power-on signal PS_ON, and the first switch circuit 25 is turned on, so that the second enable end of the power conversion module 26 is enabled (at this time, Figure 4 12VSB_EN in is low level) to output power to the ultrasound main system through the second output terminal.

[0109] In a specific embodiment, the first controllable switch Q1 is a PMOS, the second controllable switch Q2 is an NMOS, and the third controllable switch Q3 is an NMOS, and when the second signal output by the comparator 23 is at a high level. The specific working process of the comparison module is as follows: when the output voltage of the battery does not meet the requirement, that is, when the sampled voltage is less than the reference voltage, the comparator 23 outputs a high level, at which time the control terminal of Q2 is at a high level, Q2 is turned on, at which time the control terminal of Q1 is pulled low, Q1 is turned on, at which time the control terminal of Q3 is at a high level, Q3 is turned on, and thus the first enable terminal connected to the first terminal of Q3 is pulled low (that is, Figure 3 5VSB_EN in is low), and the delay circuit causes the first enable terminal connected to the first terminal of Q3 to be continuously pulled low within the preset time period, that is, the first enable terminal is continuously disabled within the preset time period, so that the standby power terminal has no standby power input within the preset time period.

[0110] In summary, the connection between the two enable terminals of the power conversion module 26 and the two switch circuits can realize the control of whether the battery supplies power to the ultrasound main system, and the reliability is high.

[0111] As a preferred embodiment, the delay circuit includes a first capacitor C1, a ninth resistor R9 and a tenth resistor R10;

[0112] One end of the first capacitor C1 is connected to the second end of the first controllable switch Q1 and the first end of the ninth resistor R9, respectively. The second end of the ninth resistor R9 is connected to the first end of the tenth resistor R10 and the control end of the third controllable switch Q3, respectively. The other end of the first capacitor C1 is connected to the second end of the tenth resistor R10 and the ground, respectively.

[0113] Further, after the control end Q3 is turned off, the first enable end is at low level, but the first enable end will not be kept at low level all the time. At this time, the standby power supply end of the ultrasonic power supply has standby power supply input again after a short time without standby power supply input. Because the ultrasonic main system records and stores the fault information of abnormal power-off when the ultrasonic main system is abnormally powered off, if the fault information is not cleared, the ultrasonic main system still records the fault information after the ultrasonic main system is powered on again, and it is considered that the ultrasonic main system still has the state of abnormal power supply, at this time, the alarm information corresponding to the fault information or other protection actions (such as controlling the ultrasonic main system to be powered off forcibly) may be continuously output, which affects normal use.

[0114] The processing method in the prior art is that after the ultrasonic main system is powered off, the standby power supply of the ultrasonic main system is manually pulled out for a period of time, at this time, the fault information is cleared, at this time, the ultrasonic main system can work normally after being normally powered on, but the implementation method needs manual operation, which is not convenient.

[0115] In order to avoid that the fault information is not cleared after the ultrasonic main system is abnormally powered off, and the ultrasonic main system cannot be started after being normally powered, a delay circuit is arranged in the application. Specifically, the delay circuit is a charge-discharge circuit, and the charge-discharge circuit includes a first capacitor C1, a ninth resistor R9 and a tenth resistor R10. The specific working process of the charge-discharge circuit is as follows: after Q1 is turned on, the output voltage of the battery charges the first capacitor C1, after the first capacitor C1 is charged to the turn-on threshold of Q3, Q3 is turned on, after Q3 is turned on, the first enable end is pulled low to be disabled. Then the first capacitor C1 starts to discharge, during the discharging process, after reaching the turn-off threshold of Q3, Q3 is turned off, after Q3 is turned off, the first enable end is pulled high to be enabled. The discharging time of the discharging circuit is the time when the standby power supply end of the ultrasonic main system has no standby power supply input, and the time can be determined by adjusting the parameters of the first capacitor C1, the ninth resistor R9 and the tenth resistor R10.

[0116] Please refer to Figure 4 , Figure 4 Another part of the circuit diagram of the power supply system provided by the application.

[0117] As a preferred embodiment, the first switch circuit 25 includes an optical coupler U3, a fourth resistor R4 and a fifth resistor R5.

[0118] The anode of the diode in the optocoupler U3 is connected with the standby power supply end as the first input end of the first switch circuit 25, the cathode of the diode in the optocoupler U3 is connected with the signal end of the ultrasonic main system as the second input end of the first switch circuit 25, one end of the transistor in the optocoupler U3 is connected with the second end of the fourth resistor R4, the first end of the fifth resistor R5 and the second enable end of the power conversion module 26 as the output end of the first switch circuit 25, the first end of the fourth resistor R4 is connected with the input end of the battery, the other end of the transistor and the second end of the fifth resistor R5 are connected with the cathode of the diode and the ground end respectively.

[0119] Further, the embodiment aims to define the specific implementation of the first switch circuit 25, specifically, when the start-up signal PS_ON is a low-level signal, if there is no first signal input at the first input end of the first switch circuit 25, it indicates that there is standby power supply input at the standby power supply end of the ultrasonic main system, at this time, the diode and the transistor in the optocoupler U3 are turned on, at this time, the second end of the fourth resistor R4 is pulled low to a low level, the second enable end of the power conversion module 26 is a low level, it is determined that the second enable end is enabled, the power conversion module 26 outputs the power supply to the power supply end to supply power to the ultrasonic main system. Similarly, when there is a first signal input at the first input end of the first switch circuit 25, the first input end is a low level, the optocoupler U3 is not turned on, or when the start-up signal PS_ON is not received, the optocoupler U3 is also not turned on, in these two cases, the second end of the fourth resistor R4 is pulled high, at this time, it is determined that the second enable end is not enabled, the power conversion module 26 does not output the power supply to the power supply end of the ultrasonic main system.

[0120] Of course, the above is only one specific implementation of the embodiment, and other implementations can also be used, which are not limited herein.

[0121] In addition, as a preferred embodiment, the reference circuit 22 further comprises:

[0122] The second capacitor C2 having one end connected with the second end of the second resistor R2 and the other end grounded, is used to filter the noise at the first end of the fourth resistor R4.

[0123] As a preferred embodiment, the sampling circuit 21 further comprises:

[0124] The third capacitor C3 having one end connected with the first end of the eighth resistor R8 and the other end grounded, is used to filter the noise at the first end of the eighth resistor R8.

[0125] As a preferred embodiment, the comparison module further comprises a first voltage dividing circuit, the first voltage dividing circuit comprising an eleventh resistor R11, a twelfth resistor R12 and a fourth capacitor C4;

[0126] One end of the eleventh resistor R11 is connected with the output end of the comparator 23, and the other end of the eleventh resistor R11 is connected with one end of the twelfth resistor R12, one end of the fourth capacitor C4 and the control end of the second controllable switch Q2 respectively, and the other end of the eleventh resistor R11 is connected with the other end of the twelfth resistor R12 and the ground end.

[0127] The first voltage dividing circuit is used to divide the output voltage of the battery when the output voltage of the battery is large, so as to prevent the voltage inputted into the first controllable switch Q1 from being too large to damage the first controllable switch Q1.

[0128] As a preferred embodiment, the comparison module further comprises a second voltage dividing circuit, and the second voltage dividing circuit comprises a thirteenth resistor R13, a fourteenth resistor R14 and a fifth capacitor C5.

[0129] One end of the thirteenth resistor R13 is connected with the output end of the battery, one end of the fifth capacitor C5 and the first end of the first controllable switch Q1 respectively, and the other end of the thirteenth resistor R13 is connected with the other end of the fifth capacitor C5, the control end of the first controllable switch Q1 and one end of the fourteenth resistor R14 respectively, and the other end of the fourteenth resistor R14 is connected with the first end of the second controllable switch Q2.

[0130] Similarly, the second voltage dividing circuit is used to divide the voltage of the level signal outputted by the comparator 23 when the voltage of the level signal outputted by the comparator 23 is large, so as to prevent the voltage inputted into the second controllable switch Q2 from being too large to damage the second controllable switch Q2.

[0131] As a preferred embodiment, the first switch circuit 25 further comprises:

[0132] The sixth capacitor C6 having one end connected with the signal end of the ultrasonic main system and the other end grounded, is used to filter the noise inputted from the signal end of the ultrasonic main system.

[0133] As a preferred embodiment, the first switch circuit 25 further comprises:

[0134] The seventh capacitor C7 having one end connected with the power supply enable end and the other end grounded, is used to filter the noise of the power supply enable end and ensure the reliability of the power supply enable end.

[0135] As a preferred embodiment, the monitoring circuit 11 further comprises a fifteenth resistor R15, a second voltage stabilizing tube D2 and an eighth capacitor.

[0136] One end of the fifteenth resistor R15 is connected with the output end of the battery, and the other end of the fifteenth resistor R15 is connected with the power supply end of the comparator 23, the cathode of the second voltage stabilizing tube D2 and one end of the eighth capacitor respectively, and the other end of the eighth capacitor is connected with the anode of the second voltage stabilizing tube D2 and the ground end respectively.

[0137] Further, the embodiment aims to define a specific implementation of providing power supply for the comparator 23 in the comparison module, specifically, the output voltage of the battery can be regulated by the fifteenth resistor R15 to obtain the power supply VCC for the comparator 23.

[0138] Of course, other implementation manners can also be used, which are not limited herein.

[0139] Please refer to Figure 5 , Figure 5 A structure block diagram of an ultrasonic diagnostic apparatus provided by the present application is shown in FIG. 1, which includes the power supply system as described above, and the output terminal of the battery is connected to the power supply terminal of the ultrasonic main system through the power supply system.

[0140] When the output voltage of the battery in the ultrasonic diagnostic apparatus is within the preset range, the battery can output 5V and / or 12V power supply for each module in the ultrasonic main system (the ultrasonic main system mainly includes an ultrasonic front-end module and an ultrasonic rear-end module, of course, it can also include input devices and output devices and other control devices, which are not limited herein), otherwise, the ultrasonic main system is not powered. For other descriptions of the ultrasonic diagnostic apparatus, please refer to the above embodiments, which are not repeated herein.

[0141] It should be further noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0142] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power supply system characterized by comprising: The application relates to a monitoring circuit for an ultrasonic main system, comprising: a monitoring circuit comprising a first input end connected with an output end of a battery and an output end connected with a power supply end of the ultrasonic main system, the monitoring circuit being used for monitoring an output voltage of the battery and controlling the battery to stop supplying power to the ultrasonic main system when the output voltage is not within a preset range and for a preset time period; the monitoring circuit comprises: a sampling circuit with an input end connected with the output end of the battery as the first input end of the monitoring circuit, the sampling circuit being used for sampling the output voltage of the battery to obtain a sampling voltage; a comparison module comprising a first input end and a second input end, the first input end of the comparison module being connected with an output end of the sampling circuit, the second input end of the comparison module being used for inputting a reference voltage, the comparison module being used for comparing the sampling voltage with the reference voltage and outputting a first signal when the sampling voltage is less than the reference voltage and for the preset time period; a first switch circuit comprising a first input end and an output end, the first input end of the first switch circuit being connected with an output end of the comparison module, the output end of the first switch circuit being connected with the power supply end of the ultrasonic main system as the output end of the monitoring circuit, the first switch circuit being used for being cut off when the first signal is received to make the battery stop outputting power to the power supply end of the ultrasonic main system to stop supplying power to the ultrasonic main system; the comparison module comprises: a comparator comprising a first input end and a second input end, the first input end of the comparator being connected with the output end of the sampling circuit as the first input end of the comparison module, the second input end of the comparator being used for inputting the reference voltage as the second input end of the comparison module, the comparator being used for outputting a second signal when the sampling voltage is less than the reference voltage; a second switch circuit with an input end connected with an output end of the comparator, an output end connected with the first input end of the first switch circuit as the output end of the comparison module, the second switch circuit being used for converting the second signal into the first signal and outputting the first signal for the preset time period; the second switch circuit comprises a first controllable switch, a second controllable switch, a third controllable switch and a delay circuit; a control end of the first controllable switch is connected with a first end of the second controllable switch, a first end of the first controllable switch is connected with the output end of the battery, a second end of the first controllable switch is connected with one end of the delay circuit, the other end of the delay circuit is connected with a control end of the third controllable switch, a first end of the third controllable switch is connected with the output end of the second switch circuit as the output end of the second switch circuit, a second end of the third controllable switch is connected with a second end of the second controllable switch and a ground end respectively, and a control end of the second controllable switch is connected with the output end of the comparator as the input end of the second switch circuit; the second controllable switch is used for being turned on when the second signal is received; the first controllable switch is used for being turned on after the second controllable switch is turned on. The third controllable switch is configured to be turned on after the first controllable switch is turned on to output the first signal, and to be turned off after the preset time period; The delay circuit is used to generate a delay of the preset time period after the third controllable switch is actuated; The sampling circuit includes a seventh resistor and an eighth resistor; the first end of the seventh resistor is connected to the output end of the battery as the input end of the sampling circuit, the second end of the seventh resistor is connected to the first end of the eighth resistor, the second end of the eighth resistor is grounded, and the second end of the seventh resistor serves as the output end of the sampling circuit.

2. The power supply system according to claim 1, wherein: The comparison module further includes a sixth resistor and a first diode; One end of the sixth resistor is connected to the output end of the comparator, the other end of the sixth resistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the second input end of the comparator.

3. The power supply system of claim 1, wherein, The monitoring circuit further includes: A reference circuit has an input end connected to the output end of the battery and an output end connected to the second input end of the comparator. The reference circuit is used to output the reference voltage according to the output voltage of the battery.

4. The power supply system of claim 3, wherein, The reference circuit includes a first resistor, a second resistor, a third resistor and a first voltage regulator tube; Among them, the first end of the first resistor is connected to the output end of the battery as the input end of the reference circuit, the second end of the first resistor is respectively connected to the cathode, the voltage stabilizing end and the first end of the second resistor of the first voltage regulator, the second end of the second resistor is respectively connected to the first end of the third resistor and the second input end of the comparator as the output end of the reference circuit, and the second end of the third resistor is respectively connected to the anode of the first voltage regulator and the ground end.

5. The power supply system of claim 1, wherein, The monitoring circuit further includes a second input terminal, and the second input terminal is connected to the signal terminal of the ultrasound main system; The monitoring circuit is further configured to control the battery to supply power to the ultrasound main system when the output voltage of the battery is within a preset range and the signal terminal outputs a power-on signal.

6. A power supply system as claimed in any one of claims 1-5, characterized in that The power supply end of the ultrasound main system includes a standby power supply end and a power supply end; The power supply system further includes: a power conversion module, comprising an input terminal, a first enable terminal, a second enable terminal, a first output terminal, and a second output terminal, wherein the input terminal of the power conversion module is connected to the output terminal of the battery, the first enable terminal is connected to the output terminal of the second switch circuit, the second enable terminal is connected to the enable terminal of the first switch circuit, the first output terminal of the power conversion module is connected to the standby power terminal of the ultrasound main system, and the second output terminal of the power conversion module is connected to the power supply terminal of the ultrasound main system; The power conversion module is used to output standby power to the standby power end of the ultrasound main system through its own first output end when its own first enable end does not receive the first signal; and output power supply to the power supply end of the ultrasound main system through its own second output end when the second enable end detects that the first switch circuit is turned on.

7. The power supply system of claim 6, wherein, The first switch circuit further includes a second input terminal connected to the signal terminal of the ultrasound main system; The first switch circuit is specifically configured to be cut off when the first input end of the first switch circuit receives the first signal or the second input end of the first switch circuit does not receive the start-up signal, so that the power conversion module stops outputting the power supply to the power supply end of the ultrasonic main system through the second output end.

8. The power supply system of claim 7, wherein, The delay circuit comprises a first capacitor, a ninth resistor and a tenth resistor. One end of the first capacitor is connected with the second end of the first controllable switch and the first end of the ninth resistor respectively, the second end of the ninth resistor is connected with the first end of the tenth resistor and the control end of the third controllable switch respectively, and the other end of the first capacitor is connected with the second end of the tenth resistor and the ground end respectively.

9. The power supply system of claim 7, wherein, The first switch circuit comprises an optocoupler, a fourth resistor and a fifth resistor. The anode of a diode in the optocoupler is connected with the first input end of the first switch circuit and the output end of the second switch circuit, the cathode of the diode in the optocoupler is connected with the second input end of the first switch circuit and the signal end of the ultrasonic main system, one end of a transistor in the optocoupler is connected with the second end of the fourth resistor, the first end of the fifth resistor and the second enable end of the power conversion module as the output end of the first switch circuit respectively, the first end of the fourth resistor is connected with the output end of the battery, and the other end of the transistor is connected with the second end of the fifth resistor, the cathode of the diode and the ground end respectively.

10. An ultrasonic diagnostic apparatus, characterized by comprising: The power supply system comprises a battery, an ultrasonic main system and the power supply system according to any one of claims 1-9, and the output end of the battery is connected with the power supply end of the ultrasonic main system through the power supply system.

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