CN220874439U - Double-backup driving control circuit of blood pump - Google Patents
Double-backup driving control circuit of blood pump Download PDFInfo
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- CN220874439U CN220874439U CN202322563802.0U CN202322563802U CN220874439U CN 220874439 U CN220874439 U CN 220874439U CN 202322563802 U CN202322563802 U CN 202322563802U CN 220874439 U CN220874439 U CN 220874439U
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- 239000008280 blood Substances 0.000 title claims abstract description 52
- 210000004369 blood Anatomy 0.000 title claims abstract description 52
- 230000009977 dual effect Effects 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 10
- 230000006870 function Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
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- 230000002159 abnormal effect Effects 0.000 description 2
- 206010019280 Heart failures Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 230000002861 ventricular Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a double-backup driving control circuit of a blood pump, which comprises the following components: the driving circuit is electrically connected with the pre-driving chip and the motor of the blood pump, the main control MCU is electrically connected with the pre-driving chip, and the pre-driving chip is controlled by the main control MCU to drive the motor to work according to set parameters through the driving circuit; when the master control MCU fails, the pre-driving chip can independently operate and drive the motor to work according to set parameters through the driving circuit. According to the utility model, the double-backup design of the driving control circuit of the blood pump is realized by arranging the main control MCU and the pre-driving chip, so that the normal operation of the blood pump is ensured, the operation amount of the main control MCU and the number of peripheral devices of the driving circuit can be reduced, and the driving reliability of the blood pump is improved.
Description
Technical Field
The utility model relates to the technical field of blood pump control circuits, in particular to a double-backup driving control circuit of a blood pump.
Background
In recent years, VAD (VentricularAssist Device ventricular assist device) technology has become a standard therapeutic approach for the clinical treatment of end-stage heart failure; the device comprises a blood pump implanted in a human body and an external controller, wherein a connector on the blood pump is electrically connected with the controller after being led out from the skin, and the controller controls the blood pump to operate according to set parameters.
The blood pump is required to run uninterruptedly after being implanted into a human body to realize the continuous blood pumping function, but when the controller is abnormal, the blood pump can not work normally, and life danger is brought to a patient. To cope with this hidden trouble, the current practice generally has the following two ways: 1. the patient is provided with a standby controller, and when the used controller is abnormal, the standby controller is manually replaced, however, the method has high professional requirements on operators, and if the standby controller is not replaced in time, the life of the patient can be endangered. 2. The driving circuit of the controller performs double backup, in particular to redundant backup of the board cards with the same function for signal transmission and processing. Accordingly, there is a need for improvements in the art that overcome the shortcomings of the prior art.
Disclosure of Invention
The utility model aims to solve the problems of the prior art that the life of a patient is endangered due to the fact that a standby controller cannot be replaced in time, and the defects of high system failure rate, large product size and high cost due to the fact that the number of devices is increased by times due to the fact that redundant backup is adopted are overcome.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a blood pump dual backup drive control circuit comprising: the driving circuit is electrically connected with the pre-driving chip and the motor of the blood pump, the main control MCU is electrically connected with the pre-driving chip, and the pre-driving chip is controlled by the main control MCU to drive the motor to work according to set parameters through the driving circuit; when the master control MCU fails, the pre-driving chip can independently operate and drive the motor to work according to set parameters through the driving circuit.
As a further improvement of the utility model, the master control MCU controls the pre-drive chip to work in any mode of a serial communication bus, PWM and analog voltage, and when the master control MCU fails, i.e. the pre-drive chip loses the control of the master control MCU, the pre-drive chip independently operates.
As a further improvement of the utility model, the pre-driving chip is provided with a driving module and a memory, wherein the driving module is used for driving the motor to work through the driving circuit, and the memory is used for storing the operation parameters of the motor.
As a further improvement of the utility model, the pre-driving chip is provided with a rotating speed detection module for detecting the rotating speed of the motor and a current detection module for detecting the current of the motor, the pre-driving chip outputs a motor rotating speed signal and a motor current signal to the main control MCU in real time, and the main control MCU obtains the working state of the motor according to the received motor rotating speed signal and motor current signal and can make corresponding processing actions.
As a further improvement of the utility model, the driving circuit adopts a three-phase bridge driving circuit which is provided with three-phase driving bridge arms respectively electrically connected with the three-phase input ends of the motor; each phase of driving bridge arm comprises two MOS tubes, and the grid electrode of any MOS tube is electrically connected with the pre-driving chip.
As a further improvement of the utility model, the blood pump double-backup driving control circuit also comprises a power supply circuit for connecting the external two batteries, and the voltage input by the external batteries is converted by the power supply circuit to supply power to the control circuit;
the power supply circuit is provided with an electric quantity identification circuit, the electric quantity identification circuit is used for detecting electric quantity of two external batteries and performing logic operation, and the power supply circuit enables one battery with low electric quantity to supply power according to a logic operation result.
As a further improvement of the utility model, the blood pump dual-backup driving control circuit further comprises an alarm circuit electrically connected with the main control MCU, and the alarm circuit responds to an alarm instruction sent by the main control MCU to drive an alarm indicator lamp and an alarm to send out an audible and visual alarm; the alarm circuit and the main control MCU are electrically connected with an external emergency battery.
As a further improvement of the utility model, the blood pump double-backup driving control circuit also comprises a key indicator circuit, wherein an indicator in the key indicator circuit is electrically connected with the main control MCU through a single bus, and the main control MCU is used for controlling to realize brightness and custom color coordinate adjustment; the keys in the key indicator lamp circuit are electrically connected with the main control MCU through I/O.
As a further improvement of the utility model, the main control MCU is provided with two groups of I 2 C interfaces, wherein one group of I 2 C interfaces is used for being in communication connection with the pre-driving chip, and the other group of I 2 C interfaces is used for being in communication connection with an external display so as to display real-time working information of the blood pump.
As a further improvement of the utility model, the model of the pre-driving chip is TC78B009FTG.
The beneficial effects of the utility model are as follows: the utility model provides a blood pump double-backup driving control circuit, which realizes the double-backup design of the blood pump driving control circuit by arranging a main control MCU and a pre-driving chip, wherein the pre-driving chip can control the driving motor to work by the main control MCU, and when the main control MCU fails, the pre-driving chip can also independently drive the motor to work, so as to realize the multi-backup mechanism of the main control MCU for controlling the pre-driving chip, ensure the normal operation of the blood pump, reduce the operation amount of the main control MCU and the number of peripheral devices of the driving circuit, increase the reliability of the driving of the blood pump, and simultaneously, the double-backup design can not increase the number of the devices by times, not increase the product volume and the system failure rate, and has low cost, thereby solving the problem of redundancy of the circuit structure function.
Drawings
FIG. 1 is a schematic block diagram of a dual backup drive control circuit for a blood pump of the present utility model;
FIG. 2 is a schematic circuit diagram of a pre-driver chip and a driver circuit according to the present utility model;
fig. 3 is a schematic circuit diagram of the master control MCU of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Referring to fig. 1 to 3, the present utility model provides a dual backup driving control circuit for a blood pump, comprising: the driving circuit is electrically connected to the motor of the pre-driving chip and the motor of the blood pump, and the main control MCU is electrically connected to the pre-driving chip. The pre-driving chip is controlled by the main control MCU and drives the motor to work according to set parameters through the driving circuit. When the main control MCU fails, the pre-driving chip can independently operate and drive the motor to work according to set parameters through the driving circuit.
Further, the model of the pre-driving chip in this embodiment is TC78B009FTG, a driving module for driving the motor through a driving circuit and a non-volatile memory (NVM) are integrated therein, and a control program for controlling the operation of the motor is stored in the memory.
Further, the master control MCU controls the operation of the pre-driving chip by using any one of a serial communication bus, PWM and analog voltage, and in this embodiment, I 2 C is preferable. Fig. 3 is a circuit diagram of a master control MCU of the present utility model, which specifically adopts a single chip microcomputer with a model of STM32F407V, and the master control MCU obtains the control right of the pre-driving chip through the I 2 C interface, can set and configure the working parameters of the pre-driving chip, and can cure the operation parameters of the motor into the memory inside the pre-driving chip. When the master control MCU fails, that is to say, the pre-driving chip loses control of the master control MCU, the pre-driving chip can automatically control the motor to work under the condition that the pre-driving chip is separated from the control of the master control MCU.
The mechanism for the pre-driving chip to independently operate after losing the control of the main control MCU is specifically as follows: the pre-driving chip and the main control MCU are communicated through the I2C interface, when the motor is out of control after the main control MCU fails, the system is automatically restarted, and after the restarting, the pre-driving chip detects no communication with the main control MCU, the pre-driving chip operates independently according to the operation parameters of the internal memory of the pre-driving chip, and the driving module of the pre-driving chip drives the motor to work according to the set parameters through the driving circuit.
According to the utility model, through the double-backup design of the blood pump driving control circuit, the driving motor can be controlled to work by the main control MCU, when the main control MCU fails, the operation parameter of the internal memory can be independently used by the pre-driving chip to drive the motor to work, so that the multi-backup mechanism of the main control MCU for controlling the pre-driving chip is realized, the normal operation of the blood pump is ensured, the reliability of the driving of the blood pump is improved, the number of devices is not increased by times due to the double-backup design, the product volume and the system failure rate are not increased, the cost is low, and the problem of redundancy of circuit structure functions is solved.
Furthermore, the pre-driving chip is also integrated with a rotating speed detection module and a current detection module. The rotating speed detection module is used for transmitting rotating speed pulses to the rotating speed calculation input port of the main control MCU in a leakage output mode after shaping the phase-change zero-crossing signal of the motor winding, so that the rotating speed of the motor is detected in real time. The current detection module converts current into voltage signals through a sampling resistor and sends the voltage signals to an operational amplifier input end, and then the voltage signals are amplified, filtered and subjected to maximum value maintaining treatment through an adjustable amplifier and then output to an ADC input port of a main control MCU so as to detect the current of the motor in real time. The pre-driving chip outputs a motor rotating speed signal and a motor current signal to the main control MCU in real time, and the main control MCU is used for calculating the operating parameters of the motor according to the received motor rotating speed signal and the motor current signal to acquire the operating state of the motor. When the pre-driving chip detects the operation fault or the exceeding limit value of the motor, a fault signal is output to the main control MCU, and the main control MCU carries out logic judgment and makes corresponding processing actions.
Referring to fig. 2, the driving circuit of the present utility model is a three-phase bridge driving circuit, which has three-phase driving bridge arms electrically connected to three-phase input terminals of the motor respectively. Each phase of driving bridge arm comprises two N-type MOS tubes, the grid electrode of any MOS tube is electrically connected with the pre-driving chip, and the grid electrode pull-down resistor of the MOS tube is integrated in the pre-driving chip. Taking a U-phase driving bridge arm as an example for detailed description, a grid electrode of an upper MOS tube of the driving bridge arm is electrically connected with a GHT pin of a pre-driving chip, a drain electrode of the upper MOS tube is electrically connected with a power supply VM, a source electrode of the upper MOS tube is electrically connected with a drain electrode of a lower MOS tube and is electrically connected with a U-phase input end of a motor, a grid electrode of the lower MOS tube of the driving bridge arm is electrically connected with a GLU pin of the pre-driving chip, and a source electrode of the lower MOS tube is grounded through a resistor R14 and a resistor R15 which are connected in parallel. The high-side driving circuit of the three-phase bridge is integrated in the pre-driving chip, and the driving control program of the three-phase brushless motor is stored in the memory in the pre-driving chip, so that the operation amount of the main control MCU and the number of peripheral devices of the driving circuit are reduced, and the driving reliability is improved.
In addition, the double-backup driving control circuit of the blood pump also comprises a power supply circuit, an alarm circuit and a key indicator circuit.
The input end of the power supply circuit is electrically connected with an external battery, the output end of the power supply circuit is electrically connected with the main control MCU, the pre-driving chip and the three-phase bridge driving circuit, and the voltage input by the external battery is converted by the power supply circuit and then is supplied to the main control MCU, the pre-driving chip and the three-phase bridge driving circuit.
It is worth mentioning that the input of power supply circuit comes from outside two batteries, and power supply circuit is provided with electric quantity identification circuit, and electric quantity identification circuit is used for detecting the electric quantity of outside two batteries and carries out logical operation, and power supply circuit starts the low battery of electric quantity according to logical operation result and supplies power, when the low battery of this electric quantity is electric quantity to run out, starts another battery and supplies power. The double-battery mode can realize uninterrupted power supply of the blood pump, prevent the phenomenon that the blood pump stops working due to incapability of timely replacement when the electric quantity is used up, and improve the reliability of power supply.
Further, the alarm circuit is electrically connected with the main control MCU, and when two batteries of the controller are connected and fall off, the main control MCU sends an alarm instruction, and the alarm circuit responds to the alarm instruction to drive the alarm indicator lamp and the alarm to send out an audible and visual alarm.
The alarm circuit and the main control MCU are electrically connected to the external emergency battery, and after the two batteries fall off and power is lost, the alarm circuit is powered by the emergency battery. In the embodiment, the emergency battery is a dry battery, and the voltage generated by the dry battery after passing through the DC-DC buck conversion chip is supplied to the main control MCU to realize the control of the power failure alarm logic.
Further, the indicator light in the key indicator light circuit is electrically connected to the main control MCU through a single bus, and 256-level brightness and custom color coordinate adjustment are realized by the control of the main control MCU; the keys and other switching values in the key indicator lamp circuit are electrically connected to the main control MCU through the I/O, so that input and output control is realized.
In the utility model, the main control MCU is provided with two groups of I 2 C interfaces, wherein one group of I 2 C interfaces is used for being in communication connection with the pre-driving chip, and the other group of I 2 C interfaces is used for being in communication connection with an external display so as to control the display to display real-time working information of the blood pump, including but not limited to working parameter information of the blood pump, battery power information, connection state information, alarm information and the like.
Therefore, the utility model provides the double-backup driving control circuit for the blood pump, the double-backup design of the driving control circuit for the blood pump is realized by arranging the main control MCU and the pre-driving chip, the pre-driving chip can control the driving motor to work by the main control MCU, when the main control MCU fails, the pre-driving chip can also independently drive the motor to work, the multi-backup mechanism of the main control MCU for controlling the pre-driving chip is realized, the normal operation of the blood pump is ensured, the operation amount of the main control MCU and the number of peripheral devices of the driving circuit are reduced, the reliability of the driving of the blood pump is increased, meanwhile, the double-backup design can not increase the number of the devices by times, the product volume and the system failure rate are not increased, and the cost is low, thereby solving the problem of redundancy of the circuit structure function.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The foregoing description is only of a preferred embodiment of the utility model, which can be practiced in many other ways than as described herein, so that the utility model is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model without departing from the technical solution of the present utility model still falls within the scope of the technical solution of the present utility model.
Claims (10)
1. A blood pump dual backup drive control circuit, comprising: the driving circuit is electrically connected with the pre-driving chip and the motor of the blood pump, the main control MCU is electrically connected with the pre-driving chip, and the pre-driving chip is controlled by the main control MCU to drive the motor to work according to set parameters through the driving circuit; when the master control MCU fails, the pre-driving chip can independently operate and drive the motor to work according to set parameters through the driving circuit.
2. The blood pump dual backup drive control circuit of claim 1, wherein: the master control MCU controls the pre-driving chip to work in any mode of a serial communication bus, PWM and analog voltage, and when the master control MCU fails, i.e. the pre-driving chip loses the control of the master control MCU, the pre-driving chip independently operates.
3. The blood pump dual backup drive control circuit of claim 1, wherein: the pre-driving chip is provided with a driving module and a memory, the driving module is used for driving the motor to work through the driving circuit, and the memory is used for storing operation parameters of the motor.
4. The blood pump dual backup drive control circuit of claim 1, wherein: the pre-driving chip is provided with a rotating speed detection module for detecting the rotating speed of the motor and a current detection module for detecting the current of the motor, the pre-driving chip outputs motor rotating speed signals and motor current signals to the main control MCU in real time, and the main control MCU obtains the working state of the motor according to the received motor rotating speed signals and motor current signals and can make corresponding processing actions.
5. The blood pump dual backup drive control circuit of claim 1, wherein: the driving circuit adopts a three-phase bridge driving circuit which is provided with three-phase driving bridge arms respectively electrically connected with three-phase input ends of the motor; each phase of driving bridge arm comprises two MOS tubes, and the grid electrode of any MOS tube is electrically connected with the pre-driving chip.
6. The blood pump dual backup drive control circuit of claim 1, wherein: the power supply circuit is used for connecting the external two batteries, and the voltage input by the external batteries is converted by the power supply circuit and then is supplied to the control circuit;
the power supply circuit is provided with an electric quantity identification circuit, the electric quantity identification circuit is used for detecting electric quantity of two external batteries and performing logic operation, and the power supply circuit enables one battery with low electric quantity to supply power according to a logic operation result.
7. The blood pump dual backup drive control circuit of claim 1, wherein: the alarm circuit is electrically connected with the main control MCU, and responds to an alarm instruction sent by the main control MCU to drive the alarm indicator lamp and the alarm to send out an audible and visual alarm; the alarm circuit and the main control MCU are electrically connected with an external emergency battery.
8. The blood pump dual backup drive control circuit of claim 1, wherein: the display device also comprises a key indicator circuit, wherein an indicator in the key indicator circuit is electrically connected with the main control MCU through a single bus, and is controlled by the main control MCU to realize brightness and self-defined color coordinate adjustment; the keys in the key indicator lamp circuit are electrically connected with the main control MCU through I/O.
9. The blood pump dual backup drive control circuit of claim 1, wherein: the main control MCU is provided with two groups of I 2 C interfaces, wherein one group of I 2 C interfaces are used for being in communication connection with the pre-driving chip, and the other group of I 2 C interfaces are used for being in communication connection with an external display so as to display real-time working information of the blood pump.
10. The blood pump dual backup drive control circuit of claim 1, wherein: the model of the pre-driving chip is TC78B009FTG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322563802.0U CN220874439U (en) | 2023-09-21 | 2023-09-21 | Double-backup driving control circuit of blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322563802.0U CN220874439U (en) | 2023-09-21 | 2023-09-21 | Double-backup driving control circuit of blood pump |
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| Publication Number | Publication Date |
|---|---|
| CN220874439U true CN220874439U (en) | 2024-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322563802.0U Active CN220874439U (en) | 2023-09-21 | 2023-09-21 | Double-backup driving control circuit of blood pump |
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|---|---|
| CN (1) | CN220874439U (en) |
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2023
- 2023-09-21 CN CN202322563802.0U patent/CN220874439U/en active Active
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