Bionic heart beating simulation device and bionic heart beating simulation method

Abstract

The invention relates to the technical field of medical teaching simulation, and relates to a bionic cardiac beating simulation device which comprises a programmable controller; a bionic heart; simulating blood; a connecting pipe; and a power mechanism. The invention further relates to a bionic heartbeat simulation method. The method comprises the steps that S1, simulated blood is perfused; s2, the programmable controller applies pulse signals to the stepping electric cylinder, so that the stepping electric cylinder performs stepping rotation once after receiving one pulse signal, and the magnetic piston generates motion force for simulated blood in the cylinder body of the double-acting hydraulic cylinder; s3, a first magnetic switch and a second magnetic switch which are arranged on the cylinder wall of the double-acting hydraulic cylinder provide magnetic piston movement position detection, and position signals are fed back to the programmable controller; and S4, the programmable controller compares the received position signal fed back by the magnetic switch with a preset position signal according to the preset heart beat mode of the disease, and then applies a pulse signal to the stepping electric cylinder to simulate the preset heart beat mode of the disease. And the human heart beating process is reflected in a simulation manner.

Description

Technical Field

[0001] The present application relates to the technical field of medical teaching simulation, and in particular to a bionic heart beating simulation device and a bionic heart beating simulation method. Background Art

[0002] At present, most heart simulators are static medical models used for medical teaching. They have no power drive part, cannot reflect the dynamic characteristics of blood circulation, and cannot achieve the bionic beating of the heart. Some high-end heart simulators that can simulate the dynamic characteristics of the heart have been recently developed internationally. Their drives are mainly divided into the following two categories: 1. Connecting hydraulic pipelines and hydraulic components to the outside of the heart model to build a hydraulic circulation loop, and using a pump to provide power to the hydraulic loop to achieve blood circulation; 2. The hydraulic circulation loop constructed outside the heart model does not provide a power source, and provides power for blood circulation for the axial or lateral loads outside the heart.

[0003] As for the former, although the existing heart beating model can realize the heart beating, it is just beating, and it beats like a balloon, with overall expansion and contraction, no rhythm, and limited simulation effect; the existing heart beating model has a single heart beating action and cannot simulate the beating state of the heart under different diseases; the existing heart beating model has insufficient contrast in the beating of the left and right atria, left and right ventricles, and the movements are monotonous; the beating amplitude of the bionic heart cannot reflect the patient's physical condition, weight, and vascular circulation.

[0004] For the latter, the deformation of the heart cavity is caused by squeezing the heart cavity at a single point or several points, which cannot realistically describe the overall contraction of the myocardium, resulting in serious distortion in the simulation of the fluid circulation process.

[0005] The real situation of heart beating is: when the chamber contracts, the internal pressure increases, and the blood is pumped out; when the chamber relaxes, the pressure decreases, and blood rushes in.

[0006] The aforementioned drive mechanism realizes the contraction and expansion of the bionic heart. However, whether it is a heart driven directly by a machine or controlled by a liquid transmission, in order to achieve the beating frequency and amplitude of the heart, the drive mechanism is very noisy, affecting the bionic effect in a simulated surgery scenario, for example.

[0007] At the same time, in the current market, the bionic heart itself cannot maintain the shape of the heart's expansion and contraction while ensuring the feel of the heart. Because the size of the bionic heart needs to be the same as the real heart, but while ensuring the blood volume and beating, in order to support the heart shape and prevent elastic deformation from affecting the size of the heart, the internal organs are often made of thicker and harder materials, resulting in poor simulation.

[0008] Therefore, the simulation of heart beats achieved according to the above two driving principles and the existing heart model cannot simulate and reflect the human heart beating process. Summary of the invention

[0009] In order to overcome the defects of the prior art, the present application provides a bionic heart beat simulation device, comprising: Programmable controller, used to store and drive pre-set heartbeat patterns and electrical signal processing and feedback; Bionic heart, including: left atrium, right atrium, left ventricle, right ventricle; Preferably, the left ventricle connection port is perpendicular to the right ventricle connection port in the horizontal direction; the left atrium connection port is parallel to the right atrium connection port in the horizontal direction; an atrial through-port is provided between the left atrium and the right atrium, and a ventricular through-port is provided between the left ventricle and the right ventricle; Preferably, the bionic heart is made of silicone material; Simulated blood is set in connecting tubes, bionic heart and power mechanism; Connecting pipe, used for fluid connection; Preferably, the connecting tube is a silicone tube; A power mechanism, used for driving simulated blood to flow in the connecting tube and the bionic heart; Preferably, the bionic heart is connected to the double-acting hydraulic cylinder via a connecting pipe to form a circuit; Preferably, the power mechanism comprises: a double-acting hydraulic cylinder to pump simulated blood into the bionic heart; Preferably, the double-acting hydraulic cylinder comprises: a magnetic piston rod arranged in the cylinder body of the double-acting hydraulic cylinder and a magnetic piston fixedly arranged at one end of the magnetic piston rod; Preferably, the top of the double-acting hydraulic cylinder is provided with a first port close to the floating joint and a second port away from the floating joint on both sides, and the first port and the second port are both provided with a self-cut-off through-plate joint for simulating the input and / or output of blood; The stepper electric cylinder is used to provide a linear motion driving force; the stepper push rod of the stepper electric cylinder is connected to one end of the floating joint through a coupling; the other end of the floating joint is connected to one end of the magnetic piston rod of the double-acting hydraulic cylinder; the other end of the magnetic piston rod is provided with a magnetic piston; Preferably, the invention further comprises: a first magnetic switch close to the floating joint and a second magnetic switch far from the floating joint are arranged close to the fore and aft limit positions on the cylinder wall of the double-acting hydraulic cylinder; Further, preferably, the first magnetic switch and the second magnetic switch are respectively closely attached to the extreme diagonal positions on the cylinder wall; Also included: Mounting plates for fixing stepper electric cylinders and double-acting hydraulic cylinders.

[0010] A bionic heart beating simulation method is also provided, comprising: Based on the above-mentioned bionic heart beating simulation device, it is implemented including: S1. Perfusion of simulated blood; S1.1. Align the bionic heart with the atria on top and the ventricles on the bottom. S1.2. The left ventricle connection port and the first port of the double-acting hydraulic cylinder are connected by a connecting tube and the self-cut-off through-plate joint; the right atrium connection port and the second port of the double-acting hydraulic cylinder are connected by a connecting tube and the self-cut-off through-plate joint; S1.3. Simultaneously perfuse simulated blood from the right ventricle connection port and the left atrial connection port until the simulated blood overflows from the right ventricle connection port and the left atrial connection port at the same time and then connects a two-way self-stopping connector; S2. The programmable controller applies a pulse signal to the stepper cylinder, so that the stepper cylinder rotates once for each pulse signal received, so that the magnetic piston generates a kinetic force simulating blood in the double-acting hydraulic cylinder body; Preferably, the pulse signal includes: pulse quantity, pulse direction and pulse frequency; S3. A first magnetic switch and a second magnetic switch provided on the cylinder wall of a double-acting hydraulic cylinder provide magnetic piston movement position detection, and feed back the position signal to the programmable controller; S4. The programmable controller compares the position signals fed back by the first and second magnetic switches with the preset position signals according to the preset disease heartbeat pattern, and then applies a pulse signal to the stepper cylinder to simulate the preset disease heartbeat pattern.

[0011] Beneficial effects: This application uses a programmable controller to send a pulse signal including: pulse number, pulse direction and pulse frequency to the double-acting hydraulic cylinder. The electric cylinder is controlled to move forward and backward to drive the double-acting hydraulic cylinder. Through the signal feedback of the two magnetic switches on the double-acting hydraulic cylinder, a closed-loop servo system is formed, so that the stepper electric cylinder drives the double-acting hydraulic cylinder to accelerate, decelerate, stop, and start a cyclic combined movement; at the same time, in conjunction with the internal fluid path structure of the heart, the elasticity of the heart, and the different wall thickness elasticity of the atria and ventricles; the simulated blood flows at different speeds in the four chambers of the bionic heart, forming a water hammer effect, impacting the inner wall of the bionic heart to form a coherent movement. Realistically simulate the beating process of the human heart and realize the heartbeat simulation under different prefabricated disease heartbeat modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of an embodiment of a bionic heart beating simulation device; Figure 2 It is a schematic diagram of the structure of the bionic heart and its power mechanism; Figure 3It is a schematic diagram of the cross-section of the double-acting hydraulic cylinder structure; Figure 4 It is a schematic diagram of the cross section of the bionic heart structure; In the figure: 1. power mechanism; 101. stepper cylinder; 102. mounting plate; 103. stepper push rod; 104. coupling; 105. magnetic piston rod; 1051. magnetic piston; 106. floating joint; 107. first magnetic switch; 108. second magnetic switch; 109. double-acting hydraulic cylinder; 1091. fixed support foot; 110. first through-port self-cut-off through-plate joint; 111. second through-port self-cut-off through-plate joint; 112. first power supply; 113. motor driver; 114. second power supply; 115. programmable controller; 116. slide rod; 2. simulator; 21. bionic heart; 211. left ventricle connection port; 212. left atrium connection port; 213. atrium through-port; 214. right atrium connection port; 215. ventricle through-port; 216 right ventricle connection port; 3. connecting pipe. DETAILED DESCRIPTION

[0013] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0014] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0015] In the description of this application, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0016] In the description of the present application, it should be noted that the terms "upper", "vertical", "horizontal", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0017] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "provided with" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0018] As attached Figures 1 to 4 .

[0019] In order to overcome the defects of the prior art, the present application provides a bionic heart beat simulation device, comprising: Programmable controller 115, used for storing and driving pre-set heartbeat patterns and processing and feedback of electrical signals; A bionic heart 21, comprising: a left atrium, a right atrium, a left ventricle, and a right ventricle; Preferably, in this embodiment, a simulator 2 is provided, and the bionic heart 21 is disposed in the simulator 2; Preferably, the left ventricle connection port 211 and the right ventricle connection port 216 are perpendicular in the horizontal direction; the left atrium connection port 212 and the right atrium connection port 214 are parallel in the horizontal direction; Preferably, the bionic heart 21 is made of silicone material, wherein: The thickness of the outer wall of the atrium is 6mm-6.7mm; the expansion rate of the inner wall of the atrium is 10%-15%; the left atrium and the right atrium are connected in the middle, and an atrial through-hole 213 is provided, with a diameter of 10mm-15mm, and a thickness of the middle wall of 7.6mm-8.3mm; The thickness of the outer wall of the ventricle is 4mm-12mm; the expansion of the ventricle is 20%-25%; the left ventricle and the right ventricle are connected in the middle, and a ventricular through-hole 215 is provided, with a diameter of 15mm-30mm, and a thickness of the middle wall of the ventricle is 3.2mm-5.5mm; Simulated blood is arranged in the connecting tube 3, the bionic heart 21 and the power mechanism 1; Connecting pipe 3, used for fluid connection; Preferably, the connecting tube 3 is a silicone tube; A double-acting hydraulic cylinder 109 for pumping simulated blood into the bionic heart 21; Preferably, the double-acting hydraulic cylinder 109 comprises: a magnetic piston rod 105 disposed in the cylinder body of the double-acting hydraulic cylinder 109 and a magnetic piston 1051 fixedly disposed at one end of the magnetic piston rod 105; Preferably, the top of the double-acting hydraulic cylinder 109 is provided with a first port close to the floating joint 106 and a second port away from the floating joint 106 on both sides, and the first port and the second port are both provided with self-cut-off piercing joints for simulating the input and / or output of blood; A power mechanism 1, used for driving the simulated blood to flow in the connecting tube 3 and the bionic heart 21; Preferably, the bionic heart 21 is connected to the double-acting hydraulic cylinder 109 via the connecting pipe 3 to form a circuit; Preferably, the power mechanism 1 comprises: The stepper electric cylinder 101 is used to provide a linear motion driving force; the stepper push rod 103 of the stepper electric cylinder 101 is connected to one end of a floating joint 106 through a coupling 104; the other end of the floating joint 106 is connected to one end of a magnetic piston rod 105 of a double-acting hydraulic cylinder 109; the other end of the magnetic piston rod 105 is provided with a magnetic piston 1051; Preferably, the method further comprises: a first magnetic switch 107 close to the floating joint 106 and a second magnetic switch 108 far from the floating joint 106 are arranged close to the fore and aft limit positions on the cylinder wall of the double-acting hydraulic cylinder 109; Further, preferably, in this embodiment, the first magnetic switch 107 and the second magnetic switch 108 are respectively closely attached to the cylinder wall at the extreme diagonal positions; It also includes: a mounting plate 102 for fixing the stepping electric cylinder 101 and the double-acting hydraulic cylinder 109; wherein the stepping electric cylinder 101 is fixed on the mounting plate 102 via fixing legs 1091.

[0020] A bionic heart beating simulation method is also provided, comprising: Based on the above-mentioned bionic heart beating simulation device, it is implemented including: S1. Perfusion of simulated blood; S1.1. Align the bionic heart 21 with the atrium on top and the ventricle on the bottom; S1.2. The left ventricle connection port 211 and the first port of the double-acting hydraulic cylinder 109 are connected by the connecting tube 3 and the self-cutting through-plate joint 110; the right atrium connection port 214 and the second port of the double-acting hydraulic cylinder 109 are connected by the connecting tube 3 and the self-cutting through-plate joint 111; S1.3. Simultaneously perfuse simulated blood from the right ventricle connection port 216 and the left atrial connection port 212 until the simulated blood overflows from the right ventricle connection port 216 and the left atrial connection port 212 at the same time and then connects to a two-way self-stop connector; S2. The programmable controller 115 applies a pulse signal to the stepper cylinder 101, so that the stepper cylinder 101 rotates once for each pulse signal received, so that the magnetic piston 1051 generates a kinetic force to simulate blood in the double-acting hydraulic cylinder 109; Preferably, the pulse signal includes: pulse quantity, pulse direction and pulse frequency; S3. The first magnetic switch 107 and the second magnetic switch 108 provided on the cylinder wall of the double-acting hydraulic cylinder 109 provide the magnetic piston 1051 movement position detection, and the position signal is fed back to the programmable controller 115; S4. The programmable controller 115 compares the received position signal of the first magnetic switch 107 and the second magnetic switch 108 with the pre-set position signal according to the pre-set heartbeat pattern of the disease, and then applies a pulse signal to the stepping cylinder 101 to simulate the pre-set heartbeat pattern of the disease; In some other embodiments, the pre-made condition heartbeat patterns may be modified.

[0021] In some other embodiments, the first magnetic switch 107 and the second magnetic switch 108 are arranged on a slide bar 116 on the outer wall of the hydraulic cylinder; the slide bar 116 is engraved with scales, and the distance between the first magnetic switch 107 and the second magnetic switch 108 is adjusted manually or automatically to cooperate with the programmable controller 115 to simulate heartbeats in different modes.

[0022] During operation, since the double-acting hydraulic cylinder 109 has a built-in magnetic piston 1051 (preferably, the piston has a magnetic ring), the first magnetic switch 107 and the second magnetic switch 108 are respectively set at the head and tail limit positions close to the cylinder wall. Whenever the magnetic piston 1051 moves to the position of the first magnetic switch 107 or the second magnetic switch 108, the first magnetic switch 107 or the second magnetic switch 108 feeds back an electrical signal to the programmable controller 115, and the programmable controller 115 then sends a pulse signal to the stepping electric cylinder 101. In this embodiment, the action sequence includes: 1) the first power supply 112 is powered on, the motor driver 113 works, and the second power supply 114 supplies power to the programmable controller 115; then, the stepper cylinder 101 rotates forward, and the stepper push rod 103 of the stepper cylinder 101 moves forward, so that the magnetic piston 1051 of the double-acting hydraulic cylinder 109 is pushed toward the second magnetic switch 108; 2) when the second magnetic switch 108 is triggered, the stepper cylinder 101 reverses, and the magnetic piston 1051 moves in the opposite direction. When the first magnetic switch 107 is triggered, the magnetic piston 1051 returns to the second magnetic switch 108 again; 3) Steps 1) and 2 are executed sequentially, and the magnetic piston 1051 reciprocates to make the bionic heart 21 beat continuously.

[0023] Further, preferably, the stepper electric cylinder 101 includes a stepper motor (not shown in the figure), a stepper push rod 103 and a nut. The stepper motor is responsible for providing rotational motion, the stepper push rod 103 is a metal rod with spiral patterns, and a nut (not shown in the figure) matched with the stepper push rod 103. When the stepper motor rotates, the threaded coupling between the stepper push rod and the nut causes the nut to rotate accordingly and realizes linear displacement along the axis direction of the stepper push rod. The stepper motor is driven by applying a pulse signal, and each time a pulse signal is received, the stepper motor will rotate once according to a fixed step distance. On this basis, the stepper push rod and nut mechanism are used to convert the rotational motion of the stepper motor into linear motion. With the linear motion of the stepper push rod 103 of the stepper electric cylinder 101 as the driving force, the magnetic piston 1051 generates a kinetic force on the simulated blood in the cylinder body of the double-acting hydraulic cylinder 109, and the magnetic piston rod 105 squeezes the simulated blood in the cylinder with the magnetic piston 1051. When the first port outputs simulated blood, the second port inputs simulated blood; through the first port and the second port provided on the double-acting hydraulic cylinder 109, one simulates expansion and the other simulates contraction, and the bionic heart 21 beats, realizing a variety of beating amplitudes and movement postures of the heart under different disease conditions and frequency combinations.

[0024] In this embodiment, the thickness of the outer wall of the atrium is 6mm-6.7mm, and the expansion rate is 10%. In the heart beat rhythm, the amplitude of the atrium is smaller than that of the ventricle, so the atrium has this wall thickness, and the amplitude of the beat can achieve the simulation effect when the same flow rate of liquid is injected. It is used to simulate the left and right atria of a real heart, and the capacity of the left and right ventricles is different; simulate the difference in the beating amplitude, the lower chamber has a large beating amplitude, and the upper chamber has a small beating amplitude.

[0025] In this embodiment, the left atrium and the right atrium are connected in the middle, and an atrial through-hole 213 is provided, with a diameter of 15 mm and a middle wall thickness of 7.6 mm. In this application, blood flows into the left atrium through a thick middle channel with a diameter of 15 mm (atrial through-hole 213). Because the middle channel is narrow, as the left atrium expands to the critical high point first, the middle channel with a diameter of 15 mm (atrial through-hole 213) and a thickness will also undergo elastic deformation as the left atrium expands, and the diameter becomes larger, and the blood flowing to the right atrium will have an acceleration process. This structure will present a visible delay in the beating of the left and right atria, that is, the left atrium expands first, and then the right atrium begins to expand. It is used to simulate the different rhythms of the left and right atria of a real heart, making the heartbeat more simulated.

[0026] In this embodiment, the thickness of the ventricular outer wall is: 4mm-12mm; the left ventricle and the right ventricle are connected in the middle, and a ventricular through-hole 215 is provided, with a diameter of 30mm, a middle wall thickness of 3.89mm, and a 20% expansion in the ventricle. In this application, blood is simulated to flow into the left ventricle through a thick middle channel with a diameter of 30mm (ventricular through-hole 215). Due to the narrow middle channel, as the volume of the left ventricle expands to the critical high point first, the ventricular through-hole 215 with a diameter of 30mm will also undergo elastic deformation with the expansion of the left ventricle, and the diameter will increase. The blood flowing to the right ventricle will have an acceleration process, and this structure will show a visible delay in the beating of the left and right ventricles, that is, the left ventricle expands first, and then the right ventricle begins to expand. It is used to simulate the different rhythms of the left and right ventricles of the real heart, making the heartbeat more realistic.

[0027] In this embodiment, the volume of the left atrium in normal state is 30ml; the volume of the right atrium in normal state is 56ml; the volume of the left ventricle in normal state is 82ml; the volume of the right ventricle in normal state is 89ml; the total volume of the atrium is 86ml; the total volume of the ventricle is 171ML; the atrial expansion is set to 10%, that is, 8.6ml, and the ventricular expansion is set to 20%, that is, 34.2ml. The corresponding stroke in the 40-50 double-acting hydraulic cylinder 109 is extended by 6.84mm and retracted by 27.22mm, realizing the relaxation and contraction of the four chambers. In some other embodiments, it can also be achieved by adjusting the positions of the first magnetic switch 107 and the second magnetic switch 108 separately, and the predetermined effect of this application can be achieved.

[0028] In this embodiment, a pulse signal including the number of pulses, the direction of pulses and the frequency of pulses is sent to the double-acting hydraulic cylinder 109 through the programmable controller 115. The stepper cylinder 101 is controlled to move forward and backward to drive the double-acting hydraulic cylinder 109. Through the signal feedback of the first magnetic switch 107 and the second magnetic switch 108 on the double-acting hydraulic cylinder 109, a closed-loop servo system is formed, so that the stepper cylinder 101 drives the double-acting hydraulic cylinder 109 to accelerate, decelerate, stop and start the cyclic combined movement; at the same time, in conjunction with the internal liquid path structure of the bionic heart 21, the elasticity of the heart, and the different wall thickness elasticity of the atrium and ventricle, the simulated blood flows at different speeds in the four chambers of the bionic heart 21, forming a water hammer effect, and impacting the inner wall of the bionic heart 21 to form a coherent movement. The human heart beating process is realistically simulated to achieve heartbeat simulation under different prefabricated disease heartbeat modes. The simulation effect of heartbeats with preset diseases under different diseases, constitutions, genders and ages is achieved.

[0029] The above are only preferred embodiments of the present application and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A bionic heart beat simulation device, characterized in that: include: Programmable controller, used to store and drive pre-set heartbeat patterns and electrical signal processing and feedback; A bionic heart comprises: a left atrium, a right atrium, a left ventricle, and a right ventricle; an atrial through-hole is provided between the left atrium and the right atrium, and a ventricular through-hole is provided between the left ventricle and the right ventricle; Simulated blood is set in connecting tubes, bionic heart and power mechanism; Connecting pipe, used for fluid connection; The power mechanism is used to drive the simulated blood to flow in the connecting tube and the bionic heart.

2. A bionic heart beat simulation device according to claim 1, characterized in that: The left ventricular connection port is perpendicular to the right ventricular connection port in the horizontal direction; the left atrial connection port is parallel to the right atrial connection port in the horizontal direction.

3. The bionic heart beat simulation device according to claim 1, characterized in that: The bionic heart is made of silicone material.

4. The bionic heart beat simulation device according to claim 1, characterized in that: The power mechanism comprises: a double-acting hydraulic cylinder to pump simulated blood into the bionic heart; The double-acting hydraulic cylinder comprises: a magnetic piston rod arranged in the double-acting hydraulic cylinder body and a magnetic piston fixedly arranged at one end of the magnetic piston rod; The stepper electric cylinder is used to provide a linear motion driving force; the stepper push rod of the stepper electric cylinder is connected to one end of the floating joint through a coupling; the other end of the floating joint is connected to one end of the magnetic piston rod of the double-acting hydraulic cylinder; the other end of the magnetic piston rod is provided with a magnetic piston; The bionic heart is connected with the double-acting hydraulic cylinder through a connecting pipe to form a circuit.

5. The bionic heart beat simulation device according to claim 4, characterized in that: The top of the double-acting hydraulic cylinder is provided with a first port close to the floating joint and a second port away from the floating joint on both sides. The first port and the second port are both provided with self-cutoff through-plate joints for simulating the input and / or output of blood.

6. A bionic heart beat simulation device according to any one of claims 4-5, characterized in that: A first magnetic switch close to the floating joint and a second magnetic switch far from the floating joint are arranged close to the fore and aft limit positions on the cylinder wall of the double-acting hydraulic cylinder.

7. The bionic heart beat simulation device according to claim 6, characterized in that: The first magnetic switch and the second magnetic switch are respectively closely attached to the cylinder wall at the extreme diagonal positions.

8. A bionic heart beat simulation device according to any one of claims 1-5 and 7, characterized in that: Also includes: Mounting plate, used to fix stepper electric cylinder and double-acting hydraulic cylinder.

9. A bionic heart beating simulation method, characterized in that: A bionic heart beating simulation device according to any one of claims 1 to 8 is implemented, comprising the following steps: S1. Perfuse simulated blood, including the following steps: S1.

1. Align the bionic heart with the atria on top and the ventricles on the bottom. S1.

2. The left ventricle connection port and the first port of the double-acting hydraulic cylinder are connected by a connecting tube and the self-cut-off through-plate joint; the right atrium connection port and the second port of the double-acting hydraulic cylinder are connected by a connecting tube and the self-cut-off through-plate joint; S1.

3. Simultaneously perfuse simulated blood from the right ventricle connection port and the left atrial connection port until the simulated blood overflows from the right ventricle connection port and the left atrial connection port at the same time and then connects a two-way self-stopping connector; S2. The programmable controller applies a pulse signal to the stepper cylinder, so that the stepper cylinder rotates once for each pulse signal received, so that the magnetic piston generates a kinetic force simulating blood in the double-acting hydraulic cylinder body; S3. A first magnetic switch and a second magnetic switch provided on the cylinder wall of a double-acting hydraulic cylinder provide magnetic piston movement position detection, and feed back the position signal to the programmable controller; S4. The programmable controller compares the position signals fed back by the first and second magnetic switches with the preset position signals according to the preset disease heartbeat pattern, and then applies a pulse signal to the stepper cylinder to simulate the preset disease heartbeat pattern.

10. A bionic heart beat simulation method according to claim 9, characterized in that: The pulse signal includes: pulse quantity, pulse direction and pulse frequency.

11. A bionic heart beat simulation method according to any one of claims 9-10, characterized in that: The thickness of the outer wall of the atrium is 6mm-6.7mm; the expansion rate of the atrium is 10%-15%; the left atrium and the right atrium are connected in the middle, with an atrial through-hole with a diameter of 10mm-15mm and a middle wall thickness of 7.6mm-8.3mm; The thickness of the outer wall of the ventricle is 4mm-12mm; the expansion of the ventricle is 20%-25%; the left ventricle and the right ventricle are connected in the middle, with a ventricular through-hole with a diameter of 15mm-30mm and a middle wall thickness of 3.2mm-5.5mm.

Images