Vibration resistance detection device for artificial heart

Abstract

The invention discloses an anti-vibration detection device for an artificial heart, comprising a base frame, a bearing station for placing the artificial heart, a swing driving mechanism, a detection module and a main control module. The swing driving mechanism is arranged on the base frame, the swing driving mechanism is connected to the bearing station so as to drive the bearing station to swing, the detection module is used to detect parameters of the artificial heart, and the main control module is respectively connected to the swing driving mechanism and the detection module. The design simulates a vibration environment and effectively detects the artificial heart, so as to reasonably evaluate the performance of the artificial heart.

Description

Technical Field

[0001] The invention relates to the field of biomedical engineering, and in particular to an anti-vibration detection device for an artificial heart. Background Art

[0002] An artificial heart is an artificially made heart, which is basically composed of four parts: a blood pump, a drive device, a monitoring system, and an energy source. When the human heart partially or completely loses its function due to disease and cannot maintain normal circulation throughout the body, the artificial heart can temporarily or permanently partially or completely replace the heart function and promote blood circulation. At present, artificial hearts have made great progress in the field of biomedical engineering.

[0003] Since the artificial heart follows the human body and heart movement in actual work, and is subject to vibration disturbance from the human body, such as the impact of an accidental fall, the rotation of the human body in certain sports situations, and the bumps of transportation, etc., it is necessary to evaluate the anti-vibration ability of the artificial heart under a series of vibration disturbances for the reliability of the system. If the ventricular assist device has poor vibration resistance, the vibration impact will cause the rotor components in the artificial heart to hit the wall and wear, thereby reducing the control accuracy of the system on the rotor components, and even cause fatigue damage to the mechanical structure, increase energy consumption, and affect the pumping and driving capabilities of the artificial heart, causing thrombosis and threatening human life safety. The vibration disturbance that the artificial heart is subjected to during use is mainly caused by the wearer's own activities, such as the wearer walking, running, riding, swimming, and acceleration and deceleration caused by turning and sudden stopping. At present, there is no effective device to detect the vibration resistance index of the artificial heart. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an anti-vibration detection device for an artificial heart, which effectively detects the operating parameters of the artificial heart in a vibration environment and facilitates reasonable evaluation of the performance of the artificial heart.

[0005] According to the first aspect of the present invention, the vibration-resistant detection device of the artificial heart includes: a base frame; a carrying station for placing the artificial heart; a swing drive mechanism, which is arranged on the base frame and connected to the carrying station to drive the carrying station to swing; a detection module, which is used to detect the parameters of the artificial heart; and a main control module, which is respectively connected to the swing drive mechanism and the detection module.

[0006] The anti-vibration detection device for an artificial heart according to the embodiment of the present invention has at least the following beneficial effects:

[0007] The vibration resistance detection device of the artificial heart of the present invention sets the artificial heart on a carrying station, and configures a corresponding detection module on the artificial heart for detection preparation. The main control module controls the operation of the swing drive mechanism, and the swing drive mechanism drives the carrying station to swing, simulating the vibration disturbance effect received by the artificial heart. The detection module detects the operation parameters of the artificial heart under the vibration disturbance environment, thereby obtaining the vibration resistance index of the artificial heart. The present design simulates the vibration environment and effectively detects the artificial heart, which is convenient for reasonably evaluating the performance of the artificial heart.

[0008] According to some embodiments of the present invention, the swing drive mechanism includes a rotation drive component and a swing arm, the rotation drive component is arranged on the base frame, one end of the swing arm is connected to the carrying station, and the rotation drive component is connected to the other end of the swing arm to drive the swing arm to rotate.

[0009] According to some embodiments of the present invention, the swing drive mechanism further includes a reducer, and the rotation drive component is connected to the other end of the swing arm via the reducer.

[0010] According to some embodiments of the present invention, an angular displacement detection component is further included. The angular displacement detection component is arranged on the rotating drive component or between the swing arm and the base to detect the angular displacement of the swing arm, and the main control module is connected to the angular displacement detection component.

[0011] According to some embodiments of the present invention, an input module and an output module are further included, wherein the main control module is connected to the input module to receive control instructions for the swing drive mechanism, and the main control module is connected to the output module to output detection results of the artificial heart.

[0012] According to some embodiments of the present invention, an image synchronization capture module is further included, wherein the image synchronization capture module is used to capture detection images of the artificial heart, and the main control module is connected to the image synchronization capture module.

[0013] According to some embodiments of the present invention, the detection module includes a flow pressure detection unit and / or a flow detection unit, and the flow pressure detection unit and / or the flow detection unit can be connected to the blood pump mechanism of the artificial heart.

[0014] According to some embodiments of the present invention, the detection module comprises a current detection unit, and the current detection unit can be connected to a rotor component of the artificial heart.

[0015] According to some embodiments of the present invention, the detection module includes a noise detection unit, and the noise detection unit is disposed on the carrying station.

[0016] According to some embodiments of the present invention, the detection module comprises an acceleration detection unit, and the acceleration detection unit is capable of contacting the artificial heart.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a principle structure block diagram of one embodiment of the vibration resistance detection device of the present invention;

[0020] Figure 2 A front view of one embodiment of the vibration-resistant detection device of the present invention;

[0021] Figure 3 A side view of one embodiment of the vibration-resistant detection device of the present invention;

[0022] Figure 4 A top view of one embodiment of the vibration-resistant detection device of the present invention;

[0023] Figure 5 This is a schematic structural diagram of a main control module of one embodiment of the vibration resistance detection device of the present invention.

[0024] Reference numerals:

[0025] A base frame 100, a carrying station 200, a swing drive mechanism 300, a rotation drive component 310, a swing arm 320, a detection module 400, a flow pressure detection unit 410, a flow detection unit 420, a current detection unit 430, a noise detection unit 440, an acceleration detection unit 450, a main control module 500, an input module 600, an output module 700, an angular displacement detection component 800, and an image synchronization capture module 900. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1-5 As shown, the vibration resistance detection device of the artificial heart according to the embodiment of the present invention includes a base frame 100, a carrying station 200 for placing the artificial heart, a swing driving mechanism 300, a detection module 400 and a main control module, the swing driving mechanism 300 is arranged on the base frame 100, the swing driving mechanism 300 is connected to the carrying station 200 so as to drive the carrying station 200 to swing, the detection module 400 is used to detect the parameters of the artificial heart, and the main control module is respectively connected to the swing driving mechanism 300 and the detection module 400.

[0031] Among them, Figure 5As shown, the main control module can be composed of a central processing unit such as a CPU and auxiliary circuits, specifically, it also includes an input module and an output module. The main control module is connected to the input module to receive control instructions for the swing drive mechanism 300, and the main control module is connected to the output module to output the detection results of the artificial heart, thereby forming a control platform. The output module can be a display screen, a touch screen or a voice announcer, and the input module can be an operation button on a keyboard or a touch screen. By inputting corresponding control instructions through the input module, the main control module can control the operation of the swing drive mechanism 300 to achieve adjustable and controllable swing angular velocity and adjustable and controllable swing acceleration.

[0032] The vibration resistance detection device of the artificial heart of the present invention sets the artificial heart on the carrying station 200, and configures the corresponding detection module 400 on the artificial heart for detection preparation. The main control module controls the operation of the swing drive mechanism 300, and the swing drive mechanism 300 drives the carrying station 200 to swing, simulating the vibration disturbance effect received by the artificial heart. The detection module 400 detects the operation parameters of the artificial heart under the vibration disturbance environment, thereby obtaining the vibration resistance index of the artificial heart. The present design simulates the vibration environment and effectively detects the artificial heart, so as to reasonably evaluate the performance of the artificial heart.

[0033] In some embodiments of the present invention, Figure 2 , Figure 3 , Figure 4 As shown, the base frame 100 is a vertical frame, and the swing drive mechanism 300 includes a rotation drive component 310 and a swing arm 320. The rotation drive component 310 is arranged above the base frame 100, one end of the swing arm 320 is connected to the carrying station 200, and the rotation drive component 310 is connected to the other end of the swing arm 320 to be able to drive the swing arm 320 to rotate.

[0034] The rotating driving component 310 may be a servo motor or a rotating cylinder. The following description will be made based on an embodiment using a servo motor.

[0035] In the arrangement of one embodiment of the detection device of the present invention (the material weight and size of one embodiment are described), according to the index requirements, if the maximum angular velocity a of the swing drive mechanism 300 is ≤10rad / s; the maximum acceleration a is ≤6G; the maximum weight limit of full load is ω: ≤2kg. The centripetal acceleration is calculated by the formula a=ω 2 R, the rotation radius of the swing arm 320 can be calculated:

[0036] R=a / ω 2 =60 / 10 2 =0.6m (1)

[0037] Since the calculation of the moment of inertia cannot ignore the mass of the swing arm 320; after preliminary modeling, it is known that the center of mass of the swing arm 320 is about 0.4m, and the mass is 2.75kG; a certain margin is considered for the load of the bearing station 200; the moment of inertia of the drive shaft system calculated at 3kg is:

[0038] J=(m×R 2 ) swingarm +(m×R 2 ) Load =1.52kg·m 2 (2)

[0039] Generally, the swing arm 320 is required to accelerate the angular velocity from 0 rad / s to a maximum of 10 rad / s (average velocity 5 rad / s) within 1 / 4 of a circle. According to the formula of average angular velocity θ and angular displacement ω, the maximum acceleration time is:

[0040]

[0041] Therefore the angular acceleration α is:

[0042]

[0043] The required torque of the motor is:

[0044] T=k1×α×J=1.1×33.34×1.52=55.73Nm (6)

[0045] Among them, k1 is the engineering margin, which is taken as 1.1 here.

[0046] The motor power is:

[0047] P=k2×T×ω=1.1×55.73×10=613W (7)

[0048] Among them, k2 is the engineering margin, which is 1.1 here. According to the above calculation, the power of the servo motor is selected as 750W, so the servo motor can be selected according to its specifications.

[0049] In some embodiments of the present invention, the swing drive mechanism 300 further includes a reducer (not shown in the figure), and the rotation drive component 310 is connected to the other end of the swing arm 320 via the reducer, wherein a two-stage reducer can be used.

[0050] The main control module controls the rotation of the rotating driving component 310, and drives the swing arm 320 to rotate through the reducer, which can reduce the output angular velocity, make the controlled angular velocity, angle and acceleration more accurate, and improve the accuracy of the detection result.

[0051] In some embodiments of the present invention, Figure 1As shown, an angular displacement detection component is also included. The angular displacement detection component is arranged on the rotation driving component 310 or the swing arm 320 to detect the angular displacement of the swing arm 320, and the main control module is connected to the angular displacement detection component.

[0052] The angular displacement detection component can use an encoder or a Hall sensor. The angular displacement detection component can be set on the rotating drive component 310, or set between the base frame 100 and the swing arm 320. After detecting that the swing arm 320 exceeds the angle limit, the main control module controls the driving component to slow down or stop, thereby improving the operating stability of the device.

[0053] In some embodiments of the present invention, Figure 1 As shown, it also includes an image synchronization capture module, which is used to shoot the detection image of the artificial heart, and the main control module is connected to the image synchronization capture module.

[0054] Among them, the image synchronization capture module can use high-speed synchronous image capture equipment to gradually analyze the detection images of the artificial heart, and can judge the operation status of the internal rotor components (whether it hits the wall, etc.) through the vibration of the artificial heart.

[0055] In some embodiments of the present invention, the detection module 400 can detect the artificial heart by various means, such as Figure 1 As shown, for example, in order to detect the performance of the blood pump mechanism of the artificial heart under vibration interference, the detection module 400 includes a flow pressure detection unit 410 and / or a flow detection unit 420, and the flow pressure detection unit 410 and / or the flow detection unit 420 can be connected to the blood pump mechanism of the artificial heart. The flow pressure detection unit 410 and / or the flow detection unit 420 are installed in a pipeline connected to the blood pump mechanism, and the fluid pressure and flow rate given by the blood pump can be detected through the circulating liquid.

[0056] The detection module 400 may also include a current detection unit 430, which can be connected to the rotor component of the artificial heart. Under vibration interference, by detecting the operating current of the rotor component, it can be determined whether the rotor component exceeds the current threshold under normal conditions, thereby determining whether the rotor component hits the wall.

[0057] The detection module 400 may also include a noise detection unit 440. When the artificial heart is under vibration interference, the noise detection unit 440 can be selected from conventional sound collectors. The noise detection unit 440 collects the noise emitted by the artificial heart. If the noise exceeds the sound threshold, it means that the rotor component may hit the wall. Furthermore, the noise detection unit 440 is arranged on the carrying station 200 closer to the artificial heart, thereby improving the accuracy of the collection and judgment.

[0058] The detection module 400 may also include an acceleration detection unit 450, which can be in contact with the artificial heart. The acceleration detection unit 450 may be an acceleration detection chip, a gyroscope, etc. When the artificial heart is subjected to vibration interference, the acceleration detection unit 450 detects the vibration of the artificial heart, thereby determining whether the rotor component hits the wall.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vibration-proof detection device for an artificial heart, characterized in that: include: Scaffolding; A loading station for placing an artificial heart; A swing driving mechanism is arranged on the base frame, and the swing driving mechanism is connected to the carrying station to drive the carrying station to swing; A detection module, used for detecting parameters of the artificial heart; A main control module is connected to the swing drive mechanism and the detection module respectively; The swing drive mechanism comprises a rotation drive component and a swing arm, wherein the rotation drive component is arranged on the base frame, one end of the swing arm is connected to the carrying station, and the rotation drive component is connected to the other end of the swing arm to drive the swing arm to rotate; An angular displacement detection component, which is arranged on the rotating driving component or between the swing arm and the base frame to detect the angular displacement of the swing arm. The main control module is connected to the angular displacement detection component. After detecting that the swing arm exceeds the angle limit, the main control module controls the swing driving component to slow down or stop; An image synchronization capture module, which is used to capture detection images of the artificial heart. The main control module is connected to the image synchronization capture module, and gradually analyzes the detection images of the artificial heart. It can determine whether the internal rotor component hits the wall through the vibration of the artificial heart; The detection module includes a current detection unit, which can be connected to the rotor component of the artificial heart. Under vibration interference, by detecting the running current of the rotor component, it can be known whether the rotor component exceeds the current threshold of normal conditions, thereby judging whether the rotor component hits the wall; The detection module comprises a noise detection unit, which is arranged on the carrying station. The noise detection unit collects the noise emitted by the artificial heart. If the noise exceeds a sound threshold, the rotor component hits the wall.

2. The vibration resistance detection device for an artificial heart according to claim 1, characterized in that: The swing drive mechanism further includes a speed reducer, and the rotation drive component is connected to the other end of the swing arm via the speed reducer.

3. The vibration resistance detection device for an artificial heart according to claim 1, characterized in that: It also includes an input module and an output module. The main control module is connected to the input module to receive control instructions for the swing drive mechanism, and the main control module is connected to the output module to output the detection result of the artificial heart.

4. The vibration resistance detection device for an artificial heart according to claim 1, characterized in that: The detection module includes a flow rate pressure detection unit and / or a flow rate detection unit, and the flow rate pressure detection unit and / or the flow rate detection unit can be connected to the blood pump mechanism of the artificial heart.

5. The vibration resistance detection device for an artificial heart according to claim 1, characterized in that: The detection module includes an acceleration detection unit, and the acceleration detection unit can be in contact with the artificial heart.

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