Surgical power system

Abstract

The invention relates to the technical field of medical instruments, in particular to an operation power system which comprises a main machine, an operation screen is arranged on the main machine, the main machine is connected with a pedal switch and a plurality of motors, the motors are connected with a handle, a cutter is installed on the handle, and the operation power system further comprises a peristaltic pump. The host comprises a CPU (Central Processing Unit); the CPU is connected with a motor driving module, an automatic identification module, a peristaltic pump driving module, a foot switch and a display screen; and the peristaltic pump driving module is connected with the motor driving module to realize linkage of the peristaltic pump and the motor. Through matching of different motors and handles, the requirements of multiple departments can be met, the requirements of multiple handles in the same operation can also be met, and cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a surgical power system. Background Art

[0002] The existing surgical power systems on the market have problems such as single function, inability to automatically identify, insufficient cutting power, low cutting efficiency, no water pump or single water pump function. The single function can only be applied to a single surgical operation and cannot realize different surgical operations in the same department or cross-departmental surgical operations, causing hospitals to have to purchase multiple devices;

[0003] There is no automatic identification. Different motors must be connected to different hosts before they can be used. The versatility is poor. Once the host is connected to an incompatible motor, the output speed will not match the motor parameters, which may cause abnormal heating of the motor at the least, or damage the motor and handle at the worst, delaying treatment and injuring the patient.

[0004] The problem of insufficient cutting power and low cutting efficiency is that the speed of common equipment on the market is basically around 40,000 rpm. Even if there are equipment that can reach 80,000 rpm, it is achieved through a speed increaser at the expense of torque. A major indicator for judging the performance of a surgical power system is the output torque, but the final rated output torque after speed increase on the market is relatively small and cannot meet the cutting requirements of normal surgery. When cutting, the output speed often drops, resulting in low cutting efficiency and insufficient cutting power.

[0005] The water pump has a single function, and only has a simple start and stop control of the peristaltic pump. Generally, equipment with a peristaltic pump simply controls the peristaltic pump. When the peristaltic pump is running, water flows out. Even if there is no motor running at this time, the peristaltic pump will continue to output. If the output part of the peristaltic pump is always at the surgical site, liquid will accumulate in the surgical site, resulting in poor surgical vision. The accumulation of liquid will cause liquid splashing during cutting, causing secondary pollution. Similarly, if the peristaltic pump is not turned on when the mobile phone is outputting, the peristaltic pump needs to be operated separately on the host. If the peristaltic pump is not turned on in time, the friction between the high-speed running tool and the bone tissue will generate heat, which will cause burns to the surgical site and cause unnecessary harm to the patient. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a surgical power system.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the surgical power system includes a host, an operation screen is arranged on the host, a foot switch is connected to the host, a plurality of motors are connected to the host, the motors are connected to a handle, a tool is installed on the handle, and a peristaltic pump is also included;

[0008] The host comprises a CPU, and the CPU is connected with a motor drive module, an automatic identification module, a peristaltic pump drive module, a foot switch and a display screen; the peristaltic pump drive module is connected with the motor drive module to realize the linkage between the peristaltic pump and the motor.

[0009] The host is provided with at least two output interfaces, and the output interfaces are switched by the key module on the display screen. Specifically, in the present application, the key module on the display screen is connected to the I / O port of the host, and a high / low level signal is sent to the host through the key module, and the two output interfaces are enabled by the switching module, so as to select the motor output connected in the two output interfaces. Both output interfaces can be connected to the motor, and one motor can be connected to all handles. Through different handles and knives, the needs of different surgeries can be met. During the operation, there is no need to prepare multiple devices, only the motor and the handle need to be replaced, and the host has two output interfaces, and two motors can be connected at the same time, which greatly improves the efficiency of the operation, saves equipment space, and saves costs. In the present application, the CPU is based on the DSP28335 control chip, and has 18 PWM outputs that can drive multiple motors at the same time.

[0010] The automatic identification module is used to identify the type of the connected motor and select the output parameters to be used according to the different types and functions of the motor.

[0011] The motor driving module is used to drive the motor to operate. The motor driving module is connected to the corresponding motor through different motor interfaces. Each motor interface is provided with two signal lines for detecting the status of different types of motors.

[0012] The automatic identification module connects two signal lines to the I / O port of the host, and the host receives the high and low level signals sent by the two signal lines to determine the status of different types of motors. This application is based on two signals including four states: 00, 01, 10, and 11. This application is set to be a state where the motor is not connected when the host recognizes 11. The other three states represent three different types of motors. When the host detects the state of motor feedback, the corresponding output parameters are automatically selected through the switching function, and the corresponding motor type is displayed through the display screen. There is no need to readjust the parameters when switching different motors. When the host detects different states, the recognition circuit of the automatic recognition module identifies the state and jumps to the corresponding program through the Switch switching function in the software. The parameters set for each program are different according to the resistance and inductance parameters of each motor. The PID parameters of the speed loop and current loop are calculated through the motor resistance and inductance parameters to achieve the optimal closed-loop control effect.

[0013] The present invention designs a water pump linkage function. When this function is turned on, the motor output is controlled, and the peristaltic pump moves with the movement of the motor and stops with the stop of the motor. The water pump linkage function is selected by pressing a button on the display screen to select whether to enable it. Furthermore, a water pump linkage button is provided on the display screen;

[0014] When the water pump linkage button is not pressed, a low-level signal is sent to the CPU, and the motor drive module linearly adjusts the motor speed according to the voltage signal sent by the pedal switch, and the peristaltic pump drive module controls the peristaltic pump operation according to the speed set on the display screen;

[0015] When the water pump linkage button is pressed, a high-level signal is sent to the CPU. The CPU sends a drive signal to the motor drive module and the peristaltic pump drive module at the same time. At the same time, the CPU receives the foot signal of the foot switch to adjust the pulse signal, which is connected to the INT0 port of the CPU through the optocoupler circuit. The 4-way PWM signal is output to the peristaltic pump drive module to control the speed of the peristaltic pump. High-speed cutting tools will cause heat when cutting bone tissue. The design of this function allows medical staff to operate the equipment to cut bone tissue or soft tissue without having to control the peristaltic pump separately, avoiding accidental burns to the surgical site caused by delayed opening of the peristaltic pump, and the accumulation of liquid in the surgical site and the deterioration of the surgical field caused by delayed closing of the peristaltic pump. The peristaltic pump has the functions of flushing and cooling. The flow rate is adjustable. When the flow rate is small, it is cooling, and when the flow rate is large, it is flushing and cooling.

[0016] The motor speed range is 0-80000rpm. The system has a high output speed, a large speed control range, and a high torque. At 80000rpm, the torque is maintained at 20mNm. Generally, the maximum speed of the motor of similar equipment is only 40000rpm, and the high speed is increased to 80000rpm through a 2:1 speed increaser. The motor torque used is 29mNm, and after the speed increaser, the torque is about 14mNm. The present invention uses direct motor output without a speed increaser. The motor directly outputs 80000rpm, and the torque of continuous operation can be stabilized at 20mNm. It can still maintain a high torque at high speeds, providing strong power for cutting.

[0017] Because of individual differences, different surgical sites, or different people, even with the same motor handle configuration, the torque required to cut bone tissue is not the same, and there will inevitably be "hard bones". This situation puts higher requirements on the control of the motor and the performance of the motor. When the motor is running at high speed, the actual commutation position will be greatly offset. Inaccurate commutation position will cause the armature current and back electromotive force to be inconsistent in phase, resulting in a decrease in power factor, which in turn leads to a decrease in the efficiency of the brushless DC motor. The CPU adopts a dual closed-loop control of speed and current with a commutation position optimization strategy. Further, the CPU dual closed-loop control method includes the following steps:

[0018] S1: Obtain the angle signal through the Hall sensor and calculate the current speed of the motor;

[0019] S2: The given speed signal is subtracted from the feedback signal of the current motor speed, and the given current value is obtained through correction by the PID controller;

[0020] S3: Detect the three-phase current and bus current through the current sensor, calculate the current change rate, and then correct it through the PI regulator to obtain the commutation position compensation angle, which is fed back to the commutation logic control;

[0021] S4: The three-phase current is transformed by Clark and Park to obtain the values ​​of iq and id, which are subtracted from the given current value and then transformed by the controller and Park inverse transformation to obtain the required PWM control signal. The PWM control signal is transmitted to the commutation logic control and drives the inverter to work to accurately adjust the speed and torque of the motor.

[0022] Designing closed-loop control of speed and current can ensure that the motor maintains high speed and high torque performance when subjected to different loads.

[0023] The motor drive module is connected to the motor through a cable to control the start of the motor. The motor is connected to the handle through a universal mechanical interface. The connection method between the tool and the handle also adopts the existing mechanical method. The CPU is connected to the foot switch through a cable.

[0024] It should be noted that the planing motor is an integrated motor directly connected to the cutter.

[0025] The main unit is powered by the mains, which provides electrical energy to the motor. The motor outputs mechanical energy and transmits the motion to the cutter through the handle. Through the different mechanical structures of the handle, it can finally achieve rotational motion, reciprocating linear motion, swinging, etc., to complete the cutting of different surgical parts.

[0026] It is equipped with a planing motor, which is an integrated one. The corresponding tool can be installed without connecting the handle. It can realize unidirectional rotation and reciprocating rotation. The frequency of the reciprocating motion can be adjusted through the screen. The appropriate frequency can be selected according to the different tissues of the surgical site.

[0027] The system sets multiple operation modes, including normal mode, custom mode, and preset mode;

[0028] Normal mode: the output parameters can be adjusted directly;

[0029] Custom mode: The operator can set the output parameters according to the needs of the operation, and can save and name the set parameters. The operator can directly call the customized parameters according to the customized name the next time the operation is used, without the need to set them again.

[0030] In the preset mode, the operator can select the specific tool model parameters to be used on the display screen according to the motor and tool connected to the host. The host directly calls the corresponding output parameters to avoid unnecessary damage caused by the mismatch between the tool model and the output parameters.

[0031] The display screen is provided with corresponding mode buttons, and the operation mode is switched by the mode buttons, and the display screen displays the current operation mode and parameter settings.

[0032] In the custom mode, the operator can save multiple custom parameter settings and name each setting to facilitate the doctor to quickly call it up the next time it is used.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. This application has more comprehensive functions. One host can be adapted to more motors, and one motor can be connected to different handles. Medical staff often need to use multiple motor handles in conjunction with each other during operation. The universal quick interface design allows medical staff to replace the motor on the host side during the operation. They only need to replace the handle and tool during the operation. By matching different motors and handles, the needs of multiple departments such as neurosurgery, orthopedics, hand and foot surgery, and otolaryngology can be met. It can also meet the needs of multiple handles for the same operation. The hospital can only purchase one host and match it with different motors and handles, which greatly saves costs.

[0035] 2. The dual-interface design of the host can automatically identify the connected motor and set the appropriate output parameters according to the type and function of the motor, saving medical staff time in setting parameters during surgery, shortening surgery time, simplifying the operating process, and reducing patient pain.

[0036] 3. The design of the water pump linkage function realizes the synchronous operation and control of the peristaltic pump and the motor, reducing the risk of burning the patient's surgical site due to the heat generated by the high-speed operation of the tool. The water pump linkage function can effectively avoid the problem of liquid accumulation in the surgical site caused by delayed shutdown of the peristaltic pump, resulting in a poor surgical field of view and liquid splashing during cutting.

[0037] 4. Achieve continuous output of high speed and high torque. When facing different surgical parts and different people, with the support of motor performance and control system, it can provide strong power. Under the premise of continuous output of large torque, it will not drop in speed, improve cutting efficiency and stable cutting power. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a system structure diagram of the present invention;

[0039] Figure 2This is a structural block diagram of the host computer of the present invention;

[0040] Figure 3 This is a flow chart of motor switching of the present invention;

[0041] Figure 4 A flow chart of the automatic identification module of the present invention identifying a motor;

[0042] Figure 5 The circuit diagram of the automatic identification module;

[0043] Figure 6 This is a flow chart of water pump linkage;

[0044] Figure 7 This is the peristaltic pump control circuit diagram;

[0045] Figure 8 It is a double closed-loop control block diagram;

[0046] Fig. 9 It is the motor control flow chart;

[0047] Fig.10 Double closed loop control circuit Figure 1 ;

[0048] Fig.11 Double closed loop control circuit Figure 2 ;

[0049] Fig.12 It is the operation process of custom mode;

[0050] Fig.13 This is the default mode operation process. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Reference Figure 1-Figure 13 The surgical power system includes a host, an operation screen is provided on the host, a foot switch is connected to the host, a plurality of motors are connected to the host, the motors are connected to a handle, a tool is installed on the handle, and a peristaltic pump is also included;

[0053] Reference Figure 2 The host includes a CPU, and the CPU is connected to a motor drive module, an automatic identification module, a peristaltic pump drive module, a foot switch and a display screen; the peristaltic pump drive module is connected to the motor drive module to realize the linkage between the peristaltic pump and the motor.

[0054] The host is provided with at least two output interfaces, and the output interfaces are switched by a key module on the display screen. Figure 3 In this application, the button module on the display screen is connected to the I / O port of the host, and a high / low level signal is sent to the host through the button module. The two output interfaces are enabled by the switching module to select the motor output connected to the two output interfaces. Both output interfaces can be connected to the motor, and one motor can be connected to all handles. Different handles and tools can meet the needs of different surgeries. During surgery, there is no need to prepare multiple devices, only the motor and handle need to be replaced, and the host has two output interfaces, which can be connected to two motors at the same time, greatly improving surgical efficiency, saving equipment space, and saving costs. In this application, the CPU is based on the DSP28335 control chip, with 18 PWM outputs that can drive multiple motors at the same time.

[0055] Reference Figure 4 and Figure 5 The automatic identification module is used to identify the type of the connected motor and select the output parameters to be used according to the different types and functions of the motor.

[0056] The motor driving module is used to drive the motor to operate. The motor driving module is connected to the corresponding motor through different motor interfaces. Each motor interface is provided with two signal lines for detecting the status of different types of motors.

[0057] The automatic identification module connects the two signal lines to the I / O port of the host, and the host receives the high and low level signals sent by the two signal lines to determine the status of different types of motors. This application is based on two signals including four states: 00, 01, 10, and 11. This application sets that when the host recognizes 11, it is in the state of no motor connected. The other three states represent three different types of motors. When the host detects the state of motor feedback, the corresponding output parameters are automatically selected through the switching function, and the corresponding motor type is displayed on the display screen. There is no need to readjust the parameters when switching different motors. The identification circuit of the automatic identification module refers to Figure 5, taking one of the circuits as an example, the input terminal ID1, current limiting resistors R140 and R144 are connected to a 5V power supply and a light-emitting diode, and the output M_ID1 is grounded through a filter capacitor C104 and connected to a 3.3V power supply through a current limiting resistor R148. When the input terminal ID1 is at a high level (>5V), the light-emitting diode is cut off, pins 3 and 4 are cut off, and the output M_ID1 is at a high level. When the input ID1 is at a low level (<5V), the light-emitting diode is turned on, pins 3 and 4 are turned on, and the output M_ID1 is at a low level. The same is true for other circuits. When the host detects different states, the Switch switching function in the software is used to identify the state and jump to the corresponding program. The parameters set in each program are set accordingly according to the resistance and inductance of each motor. The PID parameters of the speed loop and current loop are calculated through the motor resistance and inductance parameters to achieve the optimal closed-loop control effect.

[0058] Reference Figure 6 and Figure 7 The present invention designs a water pump linkage function. When this function is turned on, the motor output is controlled, and the peristaltic pump moves with the movement of the motor and stops with the stop of the motor. The water pump linkage function is selected by pressing a button on the display screen to select whether to enable it. Furthermore, a water pump linkage button is provided on the display screen;

[0059] When the water pump linkage button is not pressed, a low-level signal is sent to the CPU, and the motor drive module linearly adjusts the motor speed according to the voltage signal sent by the pedal switch, and the peristaltic pump drive module controls the peristaltic pump operation according to the speed set on the display screen;

[0060] When the water pump linkage button is pressed, a high-level signal is sent to the CPU. The CPU sends a drive signal to the motor drive module and the peristaltic pump drive module at the same time. At the same time, the CPU receives the foot signal of the foot switch to adjust the pulse signal, which is connected to the INT0 port of the CPU through the optocoupler circuit. The foot switch sends a 0-3V voltage signal to the CPU. The CPU adjusts the PWM duty cycle according to the voltage signal, generates 4 PWM drive signals to the peristaltic pump drive module to control the speed of the peristaltic pump, and then the CPU outputs 4 PWM signals to the peristaltic pump drive module to control the speed of the peristaltic pump. High-speed cutting tools will cause heat when cutting bone tissue. The design of this function allows medical staff to operate the equipment to cut bone tissue or soft tissue without having to control the peristaltic pump separately, avoiding accidental burns to the surgical site caused by delayed opening of the peristaltic pump, and the accumulation of liquid in the surgical site and poor surgical field of view caused by delayed closing of the peristaltic pump.

[0061] Specifically, refer to Figure 7Peristaltic pump control circuit diagram, the input CLKIN of this application is connected to the 5V power supply through the light-emitting diode and the current-limiting resistor R4 to form a loop, and the output end is connected to the current-limiting resistor R1 and grounded through the optocoupler. The output port CLK sends the signal to the INT0 of the CPU, and generates 4 PWM signals to the driver chip through the P2.4-P2.7 ports to drive the peristaltic pump to work.

[0062] The voltage signal sent by the foot pedal switch is transmitted to CLKIN, and then transmitted to the INT0 port of the CPU through the optoelectronic coupling circuit. The PWM duty cycle is adjusted according to the voltage signal to generate 4 PWM drive signals to the peristaltic pump drive module to control the speed of the peristaltic pump.

[0063] The peristaltic pump has the functions of flushing and cooling. The flow rate is adjustable. When the flow rate is small, it is cooling. When the flow rate is large, it is flushing and cooling.

[0064] The motor speed range is 0-80000rpm. The system has a high output speed, a large speed control range, and a high torque. At 80000rpm, the torque is maintained at 20mNm. Generally, the maximum speed of the motor of similar equipment is only 40000rpm, and the high speed is increased to 80000rpm through a 2:1 speed increaser. The motor torque used is 29mNm, and after the speed increaser, the torque is about 14mNm. The present invention uses direct motor output without a speed increaser. The motor directly outputs 80000rpm, and the torque of continuous operation can be stabilized at 20mNm. It can still maintain a high torque at high speeds, providing strong power for cutting.

[0065] Due to individual differences, different surgical sites, or different people, even with the same motor handle configuration, the torque required to cut bone tissue is not the same, and there will inevitably be "hard bones". This situation puts higher requirements on the control and performance of the motor. When the motor is running at high speed, the actual commutation position will be greatly offset. Inaccurate commutation position will cause the armature current and back electromotive force to be inconsistent in phase, resulting in a decrease in power factor, which in turn leads to a decrease in the efficiency of the brushless DC motor. Figure 8-Figure 10 The CPU adopts a dual closed-loop control of speed and current with a commutation position optimization strategy. Further, the CPU dual closed-loop control method includes the following steps:

[0066] S1: Obtain the angle signal through the Hall sensor inside the motor and calculate the current speed of the motor;

[0067] Specifically, the three Hall sensors in the motor are arranged 120° apart and installed in the middle of the three-phase stator winding. The output of each Hall sensor is connected to an input pin of the capture unit. The three separated Hall sensors output three 180° overlapping signals. The rising and falling edges of each output are detected, thereby generating six corresponding commutation signals, each with a 60° difference between them. During one rotation of the rotor, the Hall sensor generates a total of six commutation signals. In other words, there is a 60° mechanical angle between the two commutation signals. Therefore, the current speed n can be calculated by the following formula:

[0068]

[0069] θ is the mechanical angle; t is the time it takes for the rotor to rotate.

[0070] The capture unit detects both edges of each Hall device output signal. When a specific edge is captured, the capture unit sets the corresponding interrupt flag. In the interrupt service subroutine, the CPU first determines which edge is detected (rising edge or falling edge), and then calculates the time t that has passed since the last edge was detected, and implements the phase change of the winding current based on this time. Since the positions of the three Hall sensors are fixed relative to the motor rotor, the axis offset (that is, the mechanical angle) θ between the two phase change signals is a constant.

[0071] S2: The given speed signal is subtracted from the feedback speed signal, and the given current value is obtained through correction by the PID controller;

[0072] S3: The three-phase current and bus current are detected by the current sensor (installed on the power supply circuit of the motor), and the current change rate is calculated. Then, the PI regulator is used to correct the commutation position compensation angle, which is fed back to the commutation logic control. The current change rate ΔI is calculated as follows:

[0073]

[0074] The commutation position deviation angle between the armature current and the back electromotive force is: I0 is the angle between the armature current and the back EMF; I0 is the DC bus current when the armature current and the back EMF are in phase.

[0075] S4: The three-phase current is transformed by Clark and Park to obtain the values ​​of iq and id. The given current value is subtracted from the iq value, and the required PWM control signal is obtained through DSP and Park inverse transformation. The PWM control signal is transmitted to the commutation logic control and drives the inverter to work to accurately adjust the speed and torque of the motor.

[0076] Reference Fig.10 The input IS P is processed by a filter composed of resistor R20 and capacitor C20, and the IS N is processed by a filter composed of resistor R19 and capacitor C20, and is compared by an operational amplifier. The output signal is filtered by resistor R22 and capacitor C19.

[0077] Reference Fig.11 The detection signal of Hall A phase of Hall position sensor is filtered by capacitor C25 and pulled up by resistor R31, and then transmitted to CN1. The same is true for the other two channels.

[0078] Designing closed-loop control of speed and current can ensure that the motor maintains high speed and high torque performance when subjected to different loads.

[0079] The motor drive module is connected to the motor through a cable to control the start of the motor. The motor is connected to the handle through a universal mechanical interface. The connection method between the tool and the handle also adopts the existing mechanical method. The CPU is connected to the foot switch through a cable.

[0080] It should be noted that the planing motor is an integrated motor directly connected to the cutter.

[0081] The main unit is powered by the mains, which provides electrical energy to the motor. The motor outputs mechanical energy and transmits the motion to the cutter through the handle. Through the different mechanical structures of the handle, it can finally achieve rotational motion, reciprocating linear motion, swinging, etc., to complete the cutting of different surgical parts.

[0082] The present application is provided with a planing motor, wherein the planing motor is integrated and does not require a connecting handle to install the corresponding tool. It realizes unidirectional rotation and reciprocating rotation, and the frequency of the reciprocating motion can be adjusted through the screen. The appropriate frequency can be selected according to the different tissues of the surgical site.

[0083] General surgical power systems only have simple drilling, milling, grinding and sawing functions, and can only perform surgical operations on bone tissue. Soft tissues such as fat, muscle membrane, fascia, etc. attached to the bone tissue are difficult to remove with general tools, and must be operated with a special planer. Therefore, if you want to remove soft tissue during surgery, you need another device. It will cause redundancy of equipment in the operating room and waste of resources. The surgical power system designed by the present invention has a planing function, can be connected to a planing motor, and one host can be connected to multiple motors. There is no need to replace the motor during use, nor is there any need to prepare additional equipment to realize the planing function, which saves costs, simplifies the operating process, and shortens the operation time.

[0084] Reference Fig.12 and Fig.13 , the system sets multiple operation modes, including normal mode, custom mode, and preset mode;

[0085] Normal mode: the output parameters can be adjusted directly;

[0086] Custom mode: The operator can set the output parameters according to the needs of the operation, and can save and name the set parameters. The operator can directly call the customized parameters according to the customized name the next time the operation is used, without the need to set them again.

[0087] In the preset mode, the operator can select the specific tool model parameters to be used on the display screen according to the motor and tool connected to the host. The host directly calls the corresponding output parameters to avoid unnecessary damage caused by the mismatch between the tool model and the output parameters.

[0088] The display screen is provided with corresponding mode buttons, and the operation mode is switched by the mode buttons, and the display screen displays the current operation mode and parameter settings.

[0089] In the custom mode, the operator can save multiple custom parameter settings and name each setting to facilitate the doctor to quickly call it up the next time it is used.

[0090] If the actual tool output parameters are higher than the tool requirement parameters, the tool may break unexpectedly during high-speed operation, or the heat caused by the high-speed friction between the tool and the bone tissue may burn the bone tissue, causing unnecessary harm to patients and medical staff. If the actual tool output parameters are lower than the tool requirement parameters, the cutting efficiency will be low and the operation time will be prolonged. The existence of the preset mode effectively avoids the above situation.

[0091] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification under the inventive concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A surgical power system, comprising a host, an operation screen is arranged on the host, a foot switch is connected to the host, a plurality of motors are connected to the host, the motors are connected to a handle, a tool is installed on the handle, characterized in that: Also includes a peristaltic pump; The host comprises a CPU, and the CPU is connected with a motor drive module, an automatic identification module, a peristaltic pump drive module, a foot switch and a display screen; the peristaltic pump drive module is connected with the motor drive module to realize the linkage between the peristaltic pump and the motor.

2. The surgical power system according to claim 1, characterized in that: The host is provided with at least two output interfaces, and the output interfaces are switched through a key module on the display screen.

3. The surgical power system according to claim 1, characterized in that: The automatic identification module is used to identify the type of the connected motor and select the output parameters to be used according to the different types and functions of the motor.

4. The surgical power system according to claim 3, characterized in that: The motor driving module is used to drive the motor to operate. The motor driving module is connected to the corresponding motor through different motor interfaces. Each motor interface is provided with two signal lines for detecting the status of different types of motors. The automatic identification module connects the two signal lines to the I / O port of the host, and the host receives the high and low level signals sent by the two signal lines to determine the status of different types of motors.

5. The surgical power system according to claim 2, characterized in that: A water pump linkage button is provided on the display screen; When the water pump linkage button is not pressed, a low-level signal is sent to the CPU, and the motor drive module linearly adjusts the motor speed according to the voltage signal sent by the pedal switch, and the peristaltic pump drive module controls the peristaltic pump operation according to the speed set on the display screen; When the water pump linkage button is pressed, a high-level signal is sent to the CPU. The CPU sends a drive signal to the motor drive module and the peristaltic pump drive module at the same time. At the same time, the CPU receives the foot signal from the foot switch to adjust the pulse signal, which is connected to the INT0 port of the CPU through the optocoupler circuit. The 4-way PWM signal is output to the peristaltic pump drive module through calculation to control the speed of the peristaltic pump.

6. The surgical power system according to claim 1, characterized in that: The motor speed range is 0-80000rpm.

7. The surgical power system according to claim 1, characterized in that: The CPU adopts a dual closed-loop control of speed and current with a commutation position optimization strategy, and the CPU dual closed-loop control method comprises the following steps: S1: Calculate the current speed of the motor; S2: The given speed signal is subtracted from the feedback signal of the current motor speed, and the given current value is obtained through correction by the PID controller; S3: Detect the three-phase current and bus current through the current sensor, calculate the current change rate, and then correct it through the PI regulator to obtain the commutation position compensation angle, which is fed back to the commutation logic control; S4: The three-phase current is transformed by Clark and Park to obtain the values ​​of iq and id, which are subtracted from the given current value and then transformed by the controller and Park inverse transformation to obtain the required PWM control signal. The PWM control signal is transmitted to the commutation logic control and drives the inverter to work to accurately adjust the speed and torque of the motor.

8. The surgical power system according to claim 1, characterized in that: The motor drive module is connected to the motor through a cable and is used to control the start of the motor. The motor is connected to the handle through a universal mechanical interface, and the CPU is connected to the foot switch through a cable.

9. The surgical power system according to claim 1, characterized in that: The system sets multiple operation modes, including normal mode, custom mode, and preset mode; Normal mode: the output parameters can be adjusted directly; Custom mode: The operator can set the output parameters according to the needs of the operation, and can save and name the set parameters. The operator can directly call the customized parameters according to the customized name the next time the operation is used, without the need to set them again. In the preset mode, the operator can select the specific tool model parameters to be used on the display screen according to the motor and tool connected to the host, and the host directly calls the corresponding output parameters; The display screen is provided with corresponding mode buttons, and the operation mode is switched by the mode buttons, and the display screen displays the current operation mode and parameter settings.

Images