Fluid management system and fluid management method

Abstract

The invention provides a fluid management system and a fluid management method. The fluid management system comprises a main control unit and a motor driver connected with the main control unit, and the motor driver is connected to a power supply unit through a power supply line; the motor driver is connected to the motor and used for controlling the rotating speed of the motor. Wherein the fluid management system further comprises a first switch unit and a monitoring unit, and the first switch unit is arranged on the power supply circuit; the monitoring unit is connected with the first switch unit so as to control the first switch unit to be switched on or switched off; moreover, the monitoring unit is connected with the motor to obtain the actual rotating speed of the motor; the monitoring unit controls the first switch unit to be connected or disconnected according to the actual rotating speed of the motor.

Description

Technical Field

[0001] The present disclosure relates to a fluid management system and a fluid management method. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] A fluid management system is used during the diagnosis and treatment of kidney stones. The fluid management system is used to input fluid into the body and discharge fluid from the body. The fluid management system can be used in combination with an endoscope and a lithotripsy device. The fluid management system is, for example, an infusion and suction system, which is used to infuse and / or aspirate fluid into the patient's body through the infusion and suction system.

[0004] Generally speaking, the perfusion and suction system includes three core functions, namely, perfusion of liquid, suction of liquid, and pressure and temperature measurement. Among them, the perfusion function has very strict safety requirements because it will increase the pressure in the patient's cavity. For example, during the use of the perfusion and suction system, when the motor stalls or the motor cannot stop, it often has a greater impact on the patient.

[0005] Prior art CN116549749A discloses an intelligent pressure-controlled perfusion suction system and an automatic flow control method thereof, wherein the perfusion system comprises a pressure sensor and a flow sensor, and controls a first motor through data detected by the pressure sensor and / or the flow sensor. Generally speaking, the prior art controls the motor through the software level, and cannot solve the problem of motor stalling or the motor being unable to stop.

[0006] In summary, the safety protection of the perfusion motor in the prior art is generally achieved through the motor's own supporting driver or controller software level. However, when the motor driver fails or the controller fails, it is impossible to ensure that the perfusion suction system has sufficient safety. Summary of the invention

[0007] The present disclosure provides a fluid management system and a fluid management method.

[0008] According to one aspect of the present disclosure, a fluid management system is provided, the fluid management system comprising a main control unit and a motor driver connected to the main control unit, wherein the motor driver is connected to a power supply unit through a power supply line; the motor driver is connected to a motor for controlling the speed of the motor; the fluid management system further comprises: A first switch unit, the first switch unit is arranged in the power supply line; and A monitoring unit, wherein the monitoring unit is connected to the first switch unit to control the first switch unit to be turned on or off; and the monitoring unit is connected to the motor to obtain the actual rotation speed of the motor; the monitoring unit controls the first switch unit to be turned on or off according to the actual rotation speed of the motor.

[0009] In the fluid management system disclosed in the present invention, by setting a first switch unit in the power supply line and controlling the on and off of the first switch unit through a monitoring unit, the fluid management system disclosed in the present invention adds an additional layer of protection through the first switch unit on the basis of conventional protection, thereby solving the problem that the motor cannot stop and improving the safety performance of the fluid management system.

[0010] According to the fluid management system of at least one embodiment of the present disclosure, the main control unit is also used to send a control signal to the motor driver, and the control signal includes the expected speed of the motor; the main control unit is communicatively connected with the monitoring unit, and the main control unit also synchronously provides the control signal to the monitoring unit, and the monitoring unit controls the first switch unit to be turned on or off according to the expected speed of the motor and the actual speed of the motor after executing the control signal.

[0011] According to the fluid management system of at least one embodiment of the present disclosure, the monitoring unit compares the expected speed of the motor with the actual speed of the motor after executing the control signal, and obtains a comparison result; wherein, when the comparison result is that the expected speed of the motor does not match the actual speed of the motor after executing the control signal, the monitoring unit controls the first switch unit to disconnect.

[0012] According to the fluid management system of at least one embodiment of the present disclosure, when the absolute value of the difference between the expected speed of the motor and the actual speed of the motor after executing the control signal is greater than a preset threshold, the comparison result is set to that the expected speed of the motor does not match the actual speed of the motor after executing the control signal.

[0013] In the fluid management system of the present invention, by monitoring the rotation speed of the motor, the working state of the motor can be accurately known, so that the fluid management system of the present invention can accurately control the movement process of the motor and has a better control effect.

[0014] According to the fluid management system of at least one embodiment of the present disclosure, when the monitoring unit does not receive the control signal sent by the main control unit, the monitoring unit controls the first switch unit to be disconnected.

[0015] According to the fluid management system of at least one embodiment of the present disclosure, the main control unit is communicatively connected to the monitoring unit, and when the communication connection between the monitoring unit and the main control unit is disconnected, the monitoring unit controls the first switch unit to disconnect.

[0016] According to the fluid management system of at least one embodiment of the present disclosure, the main control unit is also used to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit based on the handshake signal; wherein, when the monitoring unit does not receive the handshake signal transmitted by the main control unit, the monitoring unit controls the first switch unit to disconnect.

[0017] According to at least one embodiment of the present disclosure, the fluid management system further includes: The second switch unit is arranged in series with the first switch unit, wherein the second switch unit is connected to the main control unit, and the main control unit is used to control the second switch unit to be turned on or off.

[0018] According to the fluid management system of at least one embodiment of the present disclosure, the main control unit is also used to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit based on the handshake signal; wherein, when the main control unit does not receive the response signal transmitted by the monitoring unit, the main control unit controls the second switch unit to disconnect.

[0019] According to at least one embodiment of the present disclosure, the fluid management system further includes: A current fuse is connected in series with the first switch unit.

[0020] In the fluid management system according to at least one embodiment of the present disclosure, the current fuse includes a resettable fuse.

[0021] In the fluid management system according to at least one embodiment of the present disclosure, the main control unit and the monitoring unit are different components.

[0022] According to another aspect of the present disclosure, there is provided a fluid management method, comprising: The main control unit sends a control signal to the motor driver, and the motor driver controls the motor to rotate according to the control signal; and the main control unit also transmits the control signal to the monitoring unit; wherein the control signal includes the desired rotation speed of the motor; The monitoring unit obtains the expected speed of the motor and the actual speed of the motor after executing the control signal, and selectively controls the first switch unit to be turned on or off according to the expected speed of the motor and the actual speed of the motor after executing the control signal; wherein, when the first switch unit is disconnected, the power supply unit cannot provide power to the motor driver.

[0023] According to the fluid management method of at least one embodiment of the present disclosure, the monitoring unit compares the expected speed of the motor with the actual speed of the motor after executing the control signal, and obtains a comparison result; wherein, when the comparison result is that the expected speed of the motor does not match the actual speed of the motor after executing the control signal, the monitoring unit controls the first switch unit to disconnect.

[0024] According to the fluid management method of at least one embodiment of the present disclosure, when the absolute value of the difference between the expected rotational speed of the motor and the actual rotational speed of the motor after executing the control signal is greater than a preset threshold, the comparison result is set to that the expected rotational speed of the motor does not match the actual rotational speed of the motor after executing the control signal.

[0025] According to the fluid management method of at least one embodiment of the present disclosure, when the monitoring unit does not receive the control signal sent by the main control unit, the monitoring unit controls the first switch unit to be disconnected.

[0026] According to the fluid management method of at least one embodiment of the present disclosure, the main control unit is communicatively connected to the monitoring unit, and when the communication connection between the monitoring unit and the main control unit is disconnected, the monitoring unit controls the first switch unit to disconnect.

[0027] According to the fluid management method of at least one embodiment of the present disclosure, the main control unit is also used to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit based on the handshake signal; wherein, when the monitoring unit does not receive the handshake signal transmitted by the main control unit, the monitoring unit controls the first switch unit to disconnect.

[0028] According to the fluid management method of at least one embodiment of the present disclosure, the main control unit is also used to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit based on the handshake signal; wherein, when the main control unit does not receive the response signal transmitted by the monitoring unit, the main control unit controls the second switch unit to disconnect, wherein when the second switch unit is disconnected, the power supply unit cannot provide power to the motor driver.

[0029] According to the fluid management method of at least one embodiment of the present disclosure, when the current provided to the motor driver is greater than or equal to a preset value, the current fuse is disconnected; wherein, when the current fuse is disconnected, the power supply unit cannot provide power to the motor driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0031] Figure 1 is a structural block diagram of a fluid management system according to one embodiment of the present disclosure.

[0032] Figure 2 is a flow chart of a fluid management method according to one embodiment of the present disclosure.

[0033] Figure 3 is a flow chart of a fluid management method according to one embodiment of the present disclosure.

[0034] The specific reference numerals in the figure are: 100 Fluid Management System 110 Main control unit 120 Motor Driver 130 Motor 140 Power supply unit 150 First switch unit 160 Monitoring Unit 170 Second switch unit 180 ampere fuse. DETAILED DESCRIPTION

[0035] The present disclosure is further described in detail below in conjunction with the accompanying drawings and implementations. It is understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only the parts related to the present disclosure are shown in the accompanying drawings.

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure can be combined with each other. The technical solution of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] Unless otherwise specified, the exemplary embodiments / embodiments shown will be understood as providing exemplary features of various details of some ways in which the technical concept of the present disclosure can be implemented in practice. Therefore, unless otherwise specified, the features of the various embodiments / embodiments can be combined, separated, interchanged and / or rearranged without departing from the technical concept of the present disclosure.

[0038] The use of cross-hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same figure numbers represent the same components.

[0039] When a component is referred to as being "on" or "over," "connected to," or "coupled to" another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being "directly on," "directly connected to," or "directly coupled to" another component, there are no intervening components. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0040] For descriptive purposes, the present disclosure may use spatially relative terms such as "under," "beneath," "under," "down," "over," "upper," "above," "higher," and "side (e.g., as in "sidewall")," to describe the relationship of one component to another (other) component as shown in the accompanying drawings. The spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, components described as "under" or "beneath" other components or features would subsequently be positioned "over" the other components or features. Thus, the exemplary term "under" can encompass both the "above" and "below" orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0041] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0042] Figure 1 is a structural block diagram of a fluid management system 100 according to one embodiment of the present disclosure.

[0043] like Figure 1 As shown, the fluid management system 100 of the present disclosure may include components such as a main control unit 110 , a motor driver 120 , and a motor 130 .

[0044] The main control unit 110 of the present disclosure may be a control device such as an industrial computer, a single-chip microcomputer, a PLC or a DSP. The main control unit 110 can be connected to the motor driver 120 for communication, that is, the main control unit 110 can communicate with the motor driver 120, thereby the main control unit 110 can send a control signal to the motor driver 120. In a specific embodiment, the control signal of the present disclosure at least includes a time value at the next moment and an expected speed that the motor 130 should reach at the next moment.

[0045] The motor driver 120 controls the motor 130 to operate in the speed mode. After the motor driver 120 receives the control signal from the main control unit 110, if the current speed of the motor 130 is the same as the expected speed at the next moment, the current speed of the motor 130 can be kept unchanged. If the current speed of the motor 130 is different from the expected speed at the next moment, the motor driver 120 controls the motor 130 and makes the speed of the motor 130 change smoothly (smoothly accelerate or smoothly decelerate) from the current speed to the expected speed.

[0046] The motor 130 of the present disclosure may be a stepper motor. Of course, the present disclosure does not limit the type of the motor 130. Accordingly, the motor driver 120 may also be a stepper motor driver, and the stepper motor driver may control the speed of the motor 130 by providing PWM signals with different duty cycles to the stepper motor.

[0047] In addition, the motor 130 is used to connect to the perfusion pump so that the perfusion pump produces liquid at a preset pressure. When the motor 130 operates at different speeds, the perfusion pump can provide liquids of different pressures and / or flows. It should be known to those skilled in the art that the perfusion pump can be connected to the endoscope through the perfusion line and perfuse the liquid into the patient's body through the endoscope.

[0048] The motor driver 120 of the present disclosure is connected to the power supply unit 140 via a power supply line; thus, the power supply unit 140 can provide electric energy to the motor driver 120, and accordingly, the motor driver 120 can provide electric energy to the motor 130 and make the motor 130 rotate at a predetermined speed.

[0049] Refer to Figure 1 , the fluid management system 100 of the present disclosure further includes a first switch unit 150 and a monitoring unit 160. The first switch unit 150 of the present disclosure may be an electronic switch, specifically, the electronic switch may be a thyristor, a transistor, a field effect transistor, a thyristor, a relay, etc. The first switch unit 150 of the present disclosure is arranged in the power supply line, so that when the first switch unit 150 is turned on, the power supply unit 140 can provide electric energy to the motor driver 120; when the first switch unit 150 is turned off, the power supply unit 140 cannot provide electric energy to the motor driver 120.

[0050] The monitoring unit 160 of the present disclosure can be a control device such as an industrial computer, a single-chip microcomputer, a PLC or a DSP, and the monitoring unit 160 of the present disclosure is formed as an independent component. In other words, the main control unit 110 and the monitoring unit 160 of the present disclosure are not the same component.

[0051] The monitoring unit 160 is connected to the first switch unit 150 to control the first switch unit 150 to be turned on or off; specifically, the monitoring unit 160 of the present disclosure can control the first switch unit 150 to be turned on or off by providing voltage signals (high level or low level) of different voltage values ​​to the first switch unit 150.

[0052] The motor 130 of the present disclosure may include a speed sensor, which can obtain the rotation speed of the motor 130 in real time. In a specific embodiment, the speed sensor may be an encoder, etc., so as to obtain the rotation speed of the motor 130 with high precision through the speed sensor.

[0053] The monitoring unit 160 of the present disclosure is connected to the motor 130 to obtain the actual rotation speed of the motor 130 ; the monitoring unit 160 controls the first switch unit 150 to be turned on or off according to the actual rotation speed of the motor 130 .

[0054] Specifically, the main control unit 110 of the present disclosure is connected to the monitoring unit 160 for communication, so that the main control unit 110 can synchronously provide the control signal to the monitoring unit 160. In other words, the main control unit 110 of the present disclosure can simultaneously provide the control signal to the monitoring unit 160 and the motor driver 120. On the other hand, the main control unit 110 can also first provide the control information to the motor driver 120, and then provide the drive signal to the monitoring unit 160.

[0055] The monitoring unit 160 controls the first switch unit 150 to be turned on or off according to the expected rotation speed of the motor 130 and the actual rotation speed of the motor 130 after executing the control signal.

[0056] More specifically, the monitoring unit 160 compares the expected speed of the motor 130 with the actual speed of the motor 130 after executing the control signal, and obtains a comparison result; wherein, when the comparison result is that the expected speed of the motor 130 does not match the actual speed of the motor 130 after executing the control signal, the monitoring unit 160 controls the first switch unit 150 to disconnect.

[0057] In the present disclosure, taking into account that the increase and / or decrease in the speed of the motor 130 during the dragging operation has a certain lag, in the present disclosure, the actual speed of the motor 130 compared with the expected speed of the motor 130 can be the actual speed of the motor 130 at a preset time after the execution of the control signal. The preset time can be set to different values ​​according to the characteristics of the liquid management system. Thus, by setting the preset time, the motor 130 can have sufficient time to bring its speed close to the expected speed and reach the expected speed.

[0058] The mismatch between the expected speed of the motor and the actual speed of the motor 130 after executing the control signal means that the absolute value of the difference between the expected speed of the motor 130 and the actual speed of the motor 130 after executing the control signal is greater than a preset threshold; wherein the preset threshold may be a percentage of the expected speed of the motor 130, for example, the preset threshold may be 1% of the expected speed of the motor 130. Of course, the preset threshold of the present disclosure may also be set to other values ​​according to the safety considerations of the fluid management system.

[0059] In other words, when the absolute value of the difference between the expected speed of the motor 130 and the actual speed of the motor 130 after executing the control signal is greater than a preset threshold, the comparison result is set to that the expected speed of the motor 130 and the actual speed of the motor 130 after executing the control signal do not match, and accordingly, the monitoring unit 160 controls the first switch unit 150 to disconnect.

[0060] In another case, since the monitoring unit 160 is connected to the main control unit 110 for communication, the main control unit 110 is also used to send a handshake signal to the monitoring unit 160, and the monitoring unit 160 transmits a response signal to the main control unit 110 according to the handshake signal; when the handshake signal and the response signal are correctly sent and received, it indicates that the communication between the main control unit 110 and the monitoring unit 160 is normal. On the contrary, when the handshake signal or the response signal is not correctly sent or received, it indicates that the communication between the main control unit 110 and the monitoring unit 160 is abnormal, and at this time, the power supply unit 140 cannot provide power to the motor driver 120 to prevent the motor 130 from rotating at an inappropriate speed and causing the fluid management system to generate unreasonable fluid pressure or fluid flow.

[0061] In one case, when the communication between the monitoring unit 160 and the main control unit 110 is normal, but the monitoring unit 160 does not receive the control signal sent by the main control unit 110, the monitoring unit 160 controls the first switch unit 150 to disconnect and stops the motor 130 from rotating, thereby preventing the motor 130 from generating an excessively high rotation speed and ensuring the safety of the fluid management system.

[0062] In another case, when the communication connection between the monitoring unit 160 and the main control unit 110 is disconnected, the monitoring unit 160 controls the first switch unit 150 to be disconnected. Specifically, when the monitoring unit 160 does not receive the handshake signal transmitted by the main control unit 110, the monitoring unit 160 controls the first switch unit 150 to be disconnected, and stops the motor 130 from rotating, thereby ensuring the safety of the fluid management system.

[0063] In the present disclosure, the fluid management system 100 further includes a second switch unit 170, wherein the second switch unit 170 may be an electronic switch, specifically, the electronic switch may be a thyristor, a transistor, a field effect tube, a thyristor, a relay, etc. The second switch unit 170 is arranged in series with the first switch unit 150 on the power supply line, so that when the second switch unit 170 is turned on, the power supply unit 140 can provide electric energy to the motor driver 120 (at this time, the first switch unit 150 also needs to be in the turned-on state); when the second switch unit 170 is turned off, the power supply unit 140 cannot provide electric energy to the motor driver 120.

[0064] The second switch unit 170 is connected to the main control unit 110, and the main control unit 110 is used to control the second switch unit 170 to be turned on or off. Specifically, the main control unit 110 of the present disclosure can control the second switch unit 170 to be turned on or off by providing voltage signals (high level or low level) of different voltage values ​​to the second switch unit 170.

[0065] In the present disclosure, when the main control unit 110 does not receive the response signal transmitted by the monitoring unit 160, the main control unit 110 controls the second switch unit 170 to be disconnected. In other words, once the main control unit 110 of the present disclosure loses the data reported by the monitoring unit 160, the main control unit 110 may consider that the monitoring unit 160 is invalid, and the main control unit 110 will disconnect the second switch unit 170 to stop the motor 130 to ensure the safety of the fluid management system.

[0066] Refer to Figure 1 The fluid management system 100 of the present disclosure may further include: a current fuse 180, which is connected in series with the first switch unit 150. Specifically, the current fuse 180 includes a recoverable fuse. Therefore, when the motor 130 stalls, the current consumed by the motor 130 will be much greater than that in normal use conditions. In this case, the recoverable fuse will automatically melt, disconnect the power supply of the motor 130, and stop the motor 130 to ensure the safety of the fluid management system.

[0067] That is to say, the power supply circuit (i.e., the motor power supply circuit) of the present invention is provided with a first switch unit 150, a second switch unit 170, and a current fuse 180 in series, so that the fluid management system of the present invention adds an additional triple protection on the basis of conventional protection; that is, on the basis of conventional software protection, an additional double software protection is added through the first switch unit 150 and the second switch unit 170, which solves the problem of the motor being unable to stop and improves the safety performance of the fluid management system; at the same time, the fluid management system of the present invention also adds hardware protection (current fuse 180) at the electronic component level to avoid the risk of failure of all software protection in extreme cases, solves the problem of motor stalling, and improves the safety performance of the fluid management system.

[0068] Figure 2 is a flow chart of a fluid management method according to one embodiment of the present disclosure.

[0069] According to another aspect of the present disclosure, a fluid management method is provided, such as Figure 2 As shown, the fluid management method of the present disclosure may include: S102, the main control unit 110 sends a control signal to the motor driver 120, and the motor driver 120 controls the rotation of the motor 130 according to the control signal; and the main control unit 110 also transmits the control signal to the monitoring unit 160; wherein the control signal includes the expected speed of the motor 130; and S104, the monitoring unit 160 obtains the expected speed of the motor 130 and the actual speed of the motor 130 after executing the control signal, and selectively controls the first switch unit 150 to be turned on or off according to the expected speed of the motor 130 and the actual speed of the motor 130 after executing the control signal; wherein, when the first switch unit 150 is disconnected, the power supply unit 140 cannot provide electrical energy to the motor driver 120.

[0070] In the present disclosure, taking into account that the increase and / or decrease in the speed of the motor 130 during the dragging operation has a certain lag, in the present disclosure, the actual speed of the motor 130 compared with the expected speed of the motor 130 can be the actual speed of the motor 130 at a preset time after the execution of the control signal. The preset time can be set to different values ​​according to the characteristics of the liquid management system. Thus, by setting the preset time, the motor 130 can have sufficient time to bring its speed close to the expected speed and reach the expected speed.

[0071] Therefore, the fluid management method of the present disclosure can control the rotation speed of the motor 130, effectively avoiding the situation where the rotation speed of the motor 130 is out of control. In particular, when the rotation speed of the motor 130 is out of control, the power supply unit 140 stops supplying power to the motor 130, so that the motor 130 stops rotating, ensuring the safety of the perfusion and suction process.

[0072] Specifically, in S102, the main control unit 110 can communicate with the motor driver 120, thereby the main control unit 110 can send a control signal to the motor driver 120. In a specific embodiment, the control signal disclosed herein at least includes a time value at the next moment and an expected speed that the motor 130 should reach at the next moment.

[0073] The motor driver 120 controls the motor 130 to operate in the speed mode. After the motor driver 120 receives the control signal from the main control unit 110, if the current speed of the motor 130 is the same as the expected speed at the next moment, the current speed of the motor 130 can be kept unchanged. If the current speed of the motor 130 is different from the expected speed at the next moment, the motor driver 120 controls the motor 130 and makes the speed of the motor 130 change smoothly (smoothly accelerate or smoothly decelerate) from the current speed to the expected speed.

[0074] Moreover, the main control unit 110 of the present invention is communicatively connected with the monitoring unit 160, and the main control unit 110 also synchronously provides the control signal to the monitoring unit 160. The monitoring unit 160 controls the first switch unit 150 to be turned on or off according to the expected speed of the motor 130 and the actual speed of the motor 130 after executing the control signal.

[0075] More specifically, the monitoring unit 160 compares the expected speed of the motor 130 with the actual speed of the motor 130 after executing the control signal, and obtains a comparison result; wherein, when the comparison result is that the expected speed of the motor 130 does not match the actual speed of the motor 130 after executing the control signal, the monitoring unit 160 controls the first switch unit 150 to disconnect.

[0076] The mismatch between the expected speed of the motor and the actual speed of the motor 130 after executing the control signal means that the absolute value of the difference between the expected speed of the motor 130 and the actual speed of the motor 130 after executing the control signal is greater than a preset threshold; wherein the preset threshold may be a percentage of the expected speed of the motor 130, for example, the preset threshold may be 1% of the expected speed of the motor 130. Of course, the preset threshold of the present disclosure may also be set to other values ​​according to the safety considerations of the fluid management system.

[0077] In other words, when the absolute value of the difference between the expected speed of the motor 130 and the actual speed of the motor 130 after executing the control signal is greater than a preset threshold, the comparison result is set to that the expected speed of the motor 130 and the actual speed of the motor 130 after executing the control signal do not match, and accordingly, the monitoring unit 160 controls the first switch unit 150 to disconnect.

[0078] Figure 3 is a flow chart of a fluid management method according to one embodiment of the present disclosure.

[0079] Since the monitoring unit 160 is connected to the main control unit 110 for communication, the main control unit 110 is also used to send a handshake signal to the monitoring unit 160, and the monitoring unit 160 transmits a response signal to the main control unit 110 according to the handshake signal; when the handshake signal and the response signal are correctly sent and received, it indicates that the communication between the main control unit 110 and the monitoring unit 160 is normal. On the contrary, when the handshake signal or the response signal is not correctly sent or received, it indicates that the communication between the main control unit 110 and the monitoring unit 160 is abnormal, and at this time, the power supply unit 140 cannot provide power to the motor driver 120 to prevent the motor 130 from rotating at an inappropriate speed and causing the fluid management system to generate unreasonable fluid pressure or fluid flow.

[0080] In one case, when the communication between the monitoring unit 160 and the main control unit 110 is normal, but the monitoring unit 160 does not receive the control signal sent by the main control unit 110, the monitoring unit 160 controls the first switch unit 150 to disconnect and stops the motor 130 from rotating, thereby preventing the motor 130 from generating an excessively high rotation speed and ensuring the safety of the fluid management system.

[0081] In another case, when the communication connection between the monitoring unit 160 and the main control unit 110 is disconnected, the monitoring unit 160 controls the first switch unit 150 to be disconnected. Specifically, when the monitoring unit 160 does not receive the handshake signal transmitted by the main control unit 110, the monitoring unit 160 controls the first switch unit 150 to be disconnected, and stops the motor 130 from rotating, thereby ensuring the safety of the fluid management system.

[0082] In this disclosure, Figure 3 As shown, the fluid management method further includes S106, when the main control unit 110 does not receive the response signal transmitted by the monitoring unit 160, the main control unit 110 controls the second switch unit 170 to be disconnected. That is, once the main control unit 110 of the present disclosure loses the data reported by the monitoring unit 160, the main control unit 110 can consider that the monitoring unit 160 is invalid, and the main control unit 110 will disconnect the second switch unit 170. When the second switch unit 170 is disconnected, the power supply unit 140 cannot provide power to the motor driver 120, thereby stopping the motor 130 and ensuring the safety of the perfusion and suction process.

[0083] In the present disclosure, when the current provided to the motor driver 120 is greater than or equal to a preset value, the current fuse 180 is disconnected; wherein, when the current fuse 180 is disconnected, the power supply unit 140 cannot provide power to the motor driver 120. In a specific embodiment, the preset value may be about 1.1 times the rated current of the motor 130, so that when the motor 130 stalls, the current fuse 180 can be disconnected as soon as possible to stop the motor and ensure the safety of the perfusion and aspiration process.

[0084] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0085] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0086] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A fluid management system, comprising a main control unit and a motor driver connected to the main control unit, wherein: The motor driver is connected to the power supply unit via a power supply line; The motor driver is connected to the motor and is used to control the speed of the motor; characterized in that the fluid management system also includes: A first switch unit, the first switch unit is arranged in the power supply line; and A monitoring unit, wherein the monitoring unit is connected to the first switch unit to control the first switch unit to be turned on or off; and the monitoring unit is connected to the motor to obtain the actual rotation speed of the motor; the monitoring unit controls the first switch unit to be turned on or off according to the actual rotation speed of the motor.

2. The fluid management system according to claim 1, characterized in that: The main control unit is also used to send a control signal to the motor driver, and the control signal includes the expected speed of the motor; the main control unit is communicatively connected to the monitoring unit, and the main control unit also synchronously provides the control signal to the monitoring unit, and the monitoring unit controls the first switch unit to be turned on or off according to the expected speed of the motor and the actual speed of the motor after executing the control signal.

3. The fluid management system according to claim 2, characterized in that: The monitoring unit compares the expected speed of the motor with the actual speed of the motor after executing the control signal and obtains a comparison result; wherein, when the comparison result is that the expected speed of the motor does not match the actual speed of the motor after executing the control signal, the monitoring unit controls the first switch unit to disconnect.

4. The fluid management system according to claim 3, characterized in that: When the absolute value of the difference between the expected rotation speed of the motor and the actual rotation speed of the motor after executing the control signal is greater than a preset threshold, the comparison result is set as the expected rotation speed of the motor does not match the actual rotation speed of the motor after executing the control signal.

5. The fluid management system according to claim 2, characterized in that: When the monitoring unit does not receive the control signal sent by the main control unit, the monitoring unit controls the first switch unit to be disconnected.

6. The fluid management system according to any one of claims 1 to 5, characterized in that: The main control unit is in communication connection with the monitoring unit, and when the communication connection between the monitoring unit and the main control unit is disconnected, the monitoring unit controls the first switch unit to disconnect; Optionally, the main control unit is further used to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit according to the handshake signal; wherein, when the monitoring unit does not receive the handshake signal transmitted by the main control unit, the monitoring unit controls the first switch unit to be disconnected; Optionally, it also includes: A second switch unit, wherein the second switch unit is arranged in series with the first switch unit, wherein the second switch unit is connected to a main control unit, and the main control unit is used to control the second switch unit to be turned on or off; Optionally, the main control unit is further used to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit according to the handshake signal; wherein, when the main control unit does not receive the response signal transmitted by the monitoring unit, the main control unit controls the second switch unit to be disconnected; Optionally, it also includes: a current fuse connected in series with the first switch unit; Optionally, the current fuse comprises a resettable fuse; Optionally, the main control unit and the monitoring unit are different components.

7. A fluid management method, characterized in that: include: The main control unit sends a control signal to the motor driver, and the motor driver controls the motor to rotate according to the control signal; The main control unit also transmits the control signal to the monitoring unit; wherein the control signal includes the desired rotation speed of the motor; The monitoring unit obtains the expected speed of the motor and the actual speed of the motor after executing the control signal, and selectively controls the first switch unit to be turned on or off according to the expected speed of the motor and the actual speed of the motor after executing the control signal; wherein, when the first switch unit is disconnected, the power supply unit cannot provide power to the motor driver.

8. The fluid management method according to claim 7, characterized in that: The monitoring unit compares the expected speed of the motor with the actual speed of the motor after executing the control signal and obtains a comparison result; wherein, when the comparison result is that the expected speed of the motor does not match the actual speed of the motor after executing the control signal, the monitoring unit controls the first switch unit to disconnect.

9. The fluid management method according to claim 7 or 8, characterized in that: When the absolute value of the difference between the expected speed of the motor and the actual speed of the motor after executing the control signal is greater than a preset threshold, the comparison result is set as the expected speed of the motor and the actual speed of the motor after executing the control signal do not match; Optionally, when the monitoring unit does not receive the control signal sent by the main control unit, the monitoring unit controls the first switch unit to be disconnected; Optionally, the main control unit is communicatively connected to the monitoring unit, and when the communication connection between the monitoring unit and the main control unit is disconnected, the monitoring unit controls the first switch unit to disconnect; Optionally, the main control unit is further used to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit according to the handshake signal; wherein, when the monitoring unit does not receive the handshake signal transmitted by the main control unit, the monitoring unit controls the first switch unit to be disconnected; Optionally, the main control unit is also used to send a handshake signal to the monitoring unit, and the monitoring unit transmits a response signal to the main control unit based on the handshake signal; wherein, when the main control unit does not receive the response signal transmitted by the monitoring unit, the main control unit controls the second switch unit to disconnect, wherein when the second switch unit is disconnected, the power supply unit cannot provide power to the motor driver.

10. The fluid management method according to any one of claims 7 to 9, characterized in that: When the current provided to the motor driver is greater than or equal to a preset value, the current fuse is disconnected; wherein, when the current fuse is disconnected, the power supply unit cannot provide electrical energy to the motor driver.

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