CN114090317B - High-availability infant breathing equipment and system - Google Patents
High-availability infant breathing equipment and system Download PDFInfo
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- CN114090317B CN114090317B CN202111356309.0A CN202111356309A CN114090317B CN 114090317 B CN114090317 B CN 114090317B CN 202111356309 A CN202111356309 A CN 202111356309A CN 114090317 B CN114090317 B CN 114090317B
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1415—Saving, restoring, recovering or retrying at system level
- G06F11/1438—Restarting or rejuvenating
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- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0751—Error or fault detection not based on redundancy
- G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
- G06F11/0757—Error or fault detection not based on redundancy by exceeding limits by exceeding a time limit, i.e. time-out, e.g. watchdogs
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Abstract
The invention provides high-availability infant breathing equipment and a system, which particularly comprise a check point module, wherein the check point module is used for storing state information of a designated process into a nonvolatile storage medium when preset conditions are met and recording the time for storing the state information of the process; the watchdog module is used for sending a restarting signal to a microprocessor of infant breathing equipment when a dog feeding signal sent by the system is not received within preset time, and recording the time for sending the restarting signal; the method comprises the steps that the time for sending a restarting signal in a period of time stored by a watchdog module is sent to a microprocessor in a preset time after restarting infant breathing equipment; and the state recovery module is used for determining and recovering the state information used by the appointed progress in the infant breathing equipment according to the time for sending the restarting signal within the period of time. The invention avoids the problem that the watchdog repeatedly restarts the breathing machine after restoring to the progress state generated by the check point and then sinking into the fault again, and improves the reliability of the infant breathing equipment.
Description
Technical Field
The present application relates to the field of medical devices, and in particular to infant breathing apparatus.
Background
The breathing machine is a commonly used device in clinic, can provide breathing support for patients, improves the breathing of the patients, and plays an important role in maintaining the breathing of the patients. As equipment commonly used in respiratory emergency department, there are two types of noninvasive ventilators and invasive ventilators, and since the noninvasive ventilators have no wound on patients, the noninvasive ventilators are commonly used in ordinary assisted breathing. In the use process, because the program runs or is blocked due to unstable power supply, magnetic field interference and the like, the embedded breathing machine is blocked, and the program runs, is circulated or is blocked, the equipment is restarted in a mode of the watchdog, the watchdog is arranged in the equipment in a hardware or software mode, the system feeds dogs at regular time, the dogs cannot be fed due to the conditions of the blockage and the running of the system, and the like, a restart command is sent to the equipment by a watchdog module, so that the equipment is restarted.
However, if the ventilator is restarted, the condition that the ventilator cannot work for a short time can occur, the life of a patient can be endangered in a short time under the conditions of dyspnea and serious respiratory failure, children, especially infants, have limited expression capacity, and doctors or nurses cannot be timely informed when the ventilator cannot work normally, so that the ventilator is required to be repaired as soon as possible when the ventilator fails, for example, equipment is restarted, but medical staff cannot be kept beside the ventilator for 24 hours. And because after restarting the equipment, the parameters of the equipment are all initialized to original parameters, the life-related equipment of the breathing machine can be restarted and can be restored to the working state before the fault as much as possible, and the method has a key effect on improving the usability of the infant breathing machine.
Disclosure of Invention
To solve the above problems, in one aspect, the present invention provides a highly available infant breathing apparatus, the apparatus comprising:
the check point module is used for storing the state information of the appointed process into the nonvolatile storage medium when the preset condition is met, and recording the time for storing the state information of the process;
the watchdog module is used for sending a restarting signal to a microprocessor of infant breathing equipment when a dog feeding signal sent by the system is not received within preset time, and recording the time for sending the restarting signal; the method comprises the steps that the time for sending a restarting signal in a period of time stored by a watchdog module is sent to a microprocessor in a preset time after restarting infant breathing equipment;
and the state recovery module is used for determining and recovering the state information used by the appointed progress in the infant breathing equipment according to the time for sending the restarting signal within the period of time.
Preferably, the determining, according to the time of sending the restart signal within the period of time, state information used for recovering a specified process in the infant breathing apparatus specifically includes:
sequencing the time for sending the restart signal in the period of time according to the sequence from near to far, and respectively marking the time as T 0 、T 1 、...、T n-1 Wherein n represents the number of times a restart signal is sent in the period of time; respectively calculating the time interval t of sending the restart signal in the period of time i ＝|T i -T i+1 |，i＝0、1、...、n-2；
For the non-easyThe state information stored in the volatile memory is ordered from near to far and is respectively marked as s 0 、s 1 、...、s m Wherein m represents the number of the state information stored in the nonvolatile storage medium;
calculating t k And t k+1 If the absolute value of the difference is smaller than the first threshold value, k=k+1, and continue to calculate t k And t k+1 If the absolute value of the difference value is always smaller than a first threshold value, the infant breathing equipment enters a safe mode; otherwise, determining state information used by the recovery process according to the values of k and m, wherein k is a positive integer with an initial value of 0, and k is less than or equal to n-2; .
Preferably, the determining the state information used by the recovery process according to the values of k and m specifically includes: if k is less than or equal to m, s is k The corresponding state information is used as the state information used by the recovery process; otherwise, will s m The corresponding state information is used as state information for the recovery process.
Preferably, the infant breathing apparatus entering the safety mode means that a user process is not loaded, a configuration file configured in advance is loaded in a system process, and the system process controls the operation of the infant breathing apparatus according to the configured configuration file.
Preferably, after the infant breathing apparatus enters the safety mode, the method further comprises: and clearing the data stored in the watchdog module, and restarting the watchdog module.
Preferably, the storing the state information of the designated process in the nonvolatile storage medium when the preset condition is satisfied specifically:
and periodically acquiring the data change amount of the stack and the data change amount of the data segment of each process in the designated process, and when any one of the data change amount of the stack and the data change amount of the data segment is larger than a second threshold value, executing the operation of storing the state information of the designated process into the nonvolatile storage medium.
Preferably, the specified course refers to a course using a user-set parameter that is one or more of maximum inspiratory pressure, positive end-expiratory pressure, continuous positive pressure respiration, oxygen concentration, flow of gas, inspiratory pressure, expiratory pressure, inspiratory time, expiratory time.
Preferably, the time for sending the restart signal in a period of time stored in the watchdog module is sent to the microprocessor in a preset time after restarting the infant breathing apparatus, specifically: after init is completed, before the watchdog is opened, an instruction for reading the storage content of the watchdog is sent, and the time for sending a restart signal in a period of time stored by the watchdog module is sent to the microprocessor.
In another aspect, the present invention also provides a highly available infant respiratory system comprising a power source, a warming humidifier, an air hose, and an apparatus as described above.
Finally, the present invention also provides a highly available infant respiratory system comprising a server and a device as described above; the device and the server transmit data over a network.
According to the invention, the time of sending the restarting instruction by the watchdog is acquired by the watchdog module, one point which is most suitable for recovering the progress state is selected from the progress state information generated by utilizing the check point technology according to the time of sending the restarting instruction, and then the system is recovered to the normal working state by utilizing the determined progress state, so that on one hand, the reliability of the infant breathing machine is improved, and the condition that the infant breathing machine cannot work normally due to the fault of the breathing machine is avoided; on the other hand, according to the time of restarting the system by the watchdog twice, the situation that the system is restored to an unreliable state, namely, the process is restored and then falls into a fault before restarting is avoided.
In addition, the invention only adopts a check point mode to generate the process state for the process using the user setting parameters, thereby improving the efficiency of the system and preventing excessive occupation of system resources.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a watchdog construction;
FIG. 2 is a schematic diagram of a checkpointed save process state;
FIG. 3 is a schematic diagram of the structure of the present invention;
fig. 4 is a system configuration diagram of the present invention.
Detailed Description
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Detailed description of the preferred embodiments
The invention provides a high availability infant breathing apparatus, the apparatus comprising the following modules:
the check point module is used for storing the state information of the appointed process into the nonvolatile storage medium when the preset condition is met, and recording the time for storing the state information of the process;
checkpoint technology is to save relevant information of a process at an appropriate moment, and when the process needs to be restored, restore the process to a corresponding state, such as saving a code segment, a data segment, a stack, etc. of the process by using the saved relevant information of the process.
The watchdog module is used for sending a restarting signal to a microprocessor of infant breathing equipment when a dog feeding signal sent by the system is not received within preset time, and recording the time for sending the restarting signal; the method comprises the steps that the time for sending a restarting signal in a period of time stored by a watchdog module is sent to a microprocessor in a preset time after restarting infant breathing equipment;
as shown in fig. 1, for a connection schematic diagram of a watchdog and a microprocessor, the microprocessor feeds the watchdog at regular time, and if the watchdog is not fed in time due to system jamming or dead circulation, etc., the watchdog module sends a restart instruction to a reset pin of the microprocessor to prompt the microprocessor to restart. The watchdog may be a software watchdog or a hardware watchdog, which employs a watchdog chip, e.g. MAX708, IMP813, etc. In the present invention, the watchdog module is preferably a hardware watchdog.
And the state recovery module is used for determining and recovering the state information used by the appointed progress in the infant breathing equipment according to the time for sending the restarting signal within the period of time.
The state of the process can be obtained through the check point, and the process is restored to the corresponding state. However, if the restored state is executed next and then enters a deadlock or run state, the watchdog module will send a restart instruction to the microprocessor, which falls into a continuous restart condition, which obviously affects the normal use of the ventilator. In extreme cases, after the process state is restored, the watchdog is triggered again in a very short time (for example, 10 s), and the ventilator is restarted, which wastes a period of time, so that the ventilator cannot work normally, and the life of the patient is endangered.
For example, the process state of the 40 th minute after the breathing equipment is started is saved through the set check point, the watchdog module is triggered at the 40 th minute and the 20 th second, the system is restarted, the state of the 40 th minute process is restored, at the moment, the system can continue to execute according to the 40 th minute process, the program or the system bug and other factors cause that after 20s of running, the system is in a program run or deadlock state again, the watchdog is triggered, the system is restarted again, the state of the 40 th minute process is restored again, and after 20s of running, the system is restarted again, and the system falls into infinite circulation. Aiming at the situation, the invention selects the corresponding process state according to the process state information of a plurality of time points stored by the check points and the time of sending the restarting signal by combining the watchdog so as to avoid the occurrence of the situation of the breathing machine.
Preferably, the determining, according to the time of sending the restart signal within the period of time, state information used for recovering a specified process in the infant breathing apparatus specifically includes:
sequencing the time for sending the restart signal in the period of time according to the sequence from near to far, and respectively marking the time as T 0 、T 1 、...、T n-1 Wherein n represents the number of times a restart signal is sent in the period of time; respectively calculating the time interval t of sending the restart signal in the period of time i ＝|T i -T i+1 |，i＝0、1、...、n-2；
Ordering the state information stored in the nonvolatile storage medium in a near-far order, and respectively recording as s 0 、s 1 、...、s m Wherein m represents the number of the state information stored in the nonvolatile storage medium;
calculating t k And t k+1 If the absolute value of the difference is smaller than the first threshold value, k=k+1, and continue to calculate t k And t k+1 If the absolute value of the difference value is always smaller than a first threshold value, the infant breathing equipment enters a safe mode; otherwise, determining state information used by the recovery process according to the values of k and m, wherein k is a positive integer whose initial value is 0, and≤n-2。
preferably, the determining the state information used by the recovery process according to the values of k and m specifically includes: if k is less than or equal to m, s is k The corresponding state information is used as the state information used by the recovery process; otherwise, will s m The corresponding state information is used as state information for the recovery process.
For ease of understanding the present invention, a further description is provided below in connection with fig. 2 and a specific embodiment, but it should be understood that this embodiment is merely illustrative and the present invention is not limited to this embodiment.
As shown in fig. 2, m=5 pieces of process state information, s respectively, are saved in the system by checkpoints 0 、s 1 、s 2 、s 3 、s 4 Wherein s is 0 Nearest to the current moment s 4 The distance from the current moment is the farthest;
meanwhile, the watchdog module respectively sends a restarting instruction to the microprocessor at 10s, 30s, 50s, 100s, 500s and 1000s from the current moment, namely n=6, T 0 ＝10s、T 1 ＝30s、T 2 ＝50s、T 3 ＝100s、T 4 ＝500s、T 5 =1000 s, as shown in table 1 below, gives t 0 ＝20s、t 1 ＝20s、t 2 ＝50s、t 3 ＝400s、t 4 =500 s, assuming a first threshold of 50s, due to t 0 And t 1 The absolute value of the difference is 0s, t 1 And t 2 The absolute value of the difference is 30s, t 2 And t 3 The absolute value of the difference being 350s, i.e. t 2 And t 3 The absolute value of the difference is greater than a first threshold, k=2, m=5, since k is less than or equal to m, s will be 2 The corresponding process state is used as the state of the final recovery process. Further, in a particular embodiment, T 0 、T 1 、...、T n-1 The time may be a specific time, and is not particularly limited.
TABLE 1
| T 0 | 10s |
| T 1 | 30s |
| T 2 | 50s |
| T 3 | 100s |
| T 4 | 500s |
| T 5 | 1000s |
In another embodiment, the watchdog module sends the restart instruction at 20s, 40s, 60s, 80s, 100s, 120s, 140s, 160s, 180s, 200s, respectively, and if the first threshold is still 50s, the restart instruction is sent periodically or sent periodically within a certain fluctuation range, which is likely to be a problem for a program or hardware such as a timer, and this causes that the system cannot use the state saved by the checkpoint to restore, because after restoration, the restart instruction is sent periodically or periodically within a certain fluctuation range, and in this case, the infant breathing apparatus of the present invention enters the safe mode.
By adopting the method, the same progress state of repeated loading and storing of the breathing equipment, such as repeated loading s, can be avoided after the distance watchdog module repeatedly sends the restarting instruction 0 And (3) repeatedly restarting. In one embodiment, the physician may be based on the patientIf the condition is light or the set parameter has little effect on the patient, the first threshold may be set to a large value so that the system may be restarted from a range after the breathing apparatus is turned on.
In one embodiment, the infant breathing apparatus entering the safe mode means that a user process is not loaded, a configuration file configured in advance is loaded in a system process, and the system process controls the operation of the infant breathing apparatus according to the configured configuration file.
If the state stored by the check point is less, or the time interval of the sending and restarting of the watchdog is not changed greatly, the invention also sets the safety mode of the infant breathing equipment, in order to avoid the situation of repetition, the breathing equipment adopts the safest mode to provide breathing support for the patient in the safety mode, and the safety mode can avoid the situations of deadlock or program running and the like to a greater extent although the parameters set by a doctor cannot be used in the safety mode.
Preferably, after the infant breathing apparatus enters the safety mode, the method further comprises: and clearing the data stored in the watchdog module, and restarting the watchdog module.
The watchdog chip includes a counter, a register, a memory, etc., and after entering the secure mode, the watchdog chip may be emptied of data stored by the watchdog and restarted.
Preferably, the storing the state information of the designated process in the nonvolatile storage medium when the preset condition is satisfied specifically:
and periodically acquiring the data change amount of the stack and the data change amount of the data segment of each process in the designated process, and when any one of the data change amount of the stack and the data change amount of the data segment is larger than a second threshold value, executing the operation of storing the state information of the designated process into the nonvolatile storage medium.
The system comprises a plurality of processes, if checkpoints store state information of all processes, excessive system resources are occupied, and parameters related to breathing are important contents for adjusting the breathing machine. In one embodiment, the specified course refers to a course using parameters set by a user that are one or more of maximum inspiratory pressure, positive end-expiratory pressure, continuous positive pressure breathing, oxygen concentration, flow of ventilation, inspiratory pressure, expiratory pressure, inspiratory time, and expiratory time.
In order to timely recover the progress, preferably, the time for sending the restart signal in a period of time stored in the watchdog module is sent to the microprocessor in a preset time after restarting the infant breathing apparatus, which specifically includes: after init is completed, before the watchdog is opened, an instruction for reading the storage content of the watchdog is sent, and the time for sending a restart signal in a period of time stored by the watchdog module is sent to the microprocessor.
Second embodiment
The invention also provides a highly available infant respiratory system comprising a power source, a warming humidifier, an air hose, and an apparatus as described in example one. In one embodiment, as shown in fig. 3, the infant breathing apparatus includes a memory 31, a display 32, a microprocessor 33, an input device 34, a watchdog 35, a power source, a warming humidifier, an air hose, not shown.
Detailed description of the preferred embodiments
As shown in fig. 4, the present invention also provides a highly available infant respiratory system comprising a server 42 and a device 41 as described in example one; the device and the server transmit data over a network. In one embodiment, the system further comprises a mobile terminal through which the infant respiratory system establishes a connection with the server.
The above-described embodiment of the apparatus is merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by adding necessary general purpose hardware platforms, or may be implemented by a combination of hardware and software. Based on such understanding, the foregoing aspects, in essence and portions contributing to the art, may be embodied in the form of a computer program product, which may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A highly available infant breathing apparatus, the apparatus comprising the following modules:
the check point module is used for storing the state information of the appointed process into the nonvolatile storage medium when the preset condition is met, and recording the time for storing the state information of the process;
the watchdog module is used for sending a restarting signal to a microprocessor of infant breathing equipment when a dog feeding signal sent by the system is not received within preset time, and recording the time for sending the restarting signal; the method comprises the steps that the time for sending a restarting signal in a period of time stored by a watchdog module is sent to a microprocessor in a preset time after restarting infant breathing equipment;
and the state recovery module is used for determining and recovering the state information used by the appointed progress in the infant breathing equipment according to the time for sending the restarting signal within the period of time.
The method for determining and recovering the state information used by the specified process in the infant breathing equipment according to the time for sending the restarting signal in the period of time specifically comprises the following steps:
sequencing the time for sending the restart signal in the period of time according to the sequence from near to far, and respectively marking the time as T 0 、T 1 、...、T n-1 Wherein n represents the number of times a restart signal is sent in the period of time; respectively calculating the time interval t of sending the restart signal in the period of time i ＝|T i -T i+1 |，i＝0、1、...、n-2；
Ordering the state information stored in the nonvolatile storage medium in a near-far order, and respectively recording as s 0 、s 1 、...、s m Wherein m represents the number of the state information stored in the nonvolatile storage medium;
calculating t k And t k+1 If the absolute value of the difference is smaller than the first threshold value, k=k+1, and continue to calculate t k And t k+1 If the absolute value of the difference value is always smaller than a first threshold value, the infant breathing equipment enters a safe mode; otherwise, determining state information used by the recovery process according to the values of k and m, wherein k is a positive integer with an initial value of 0, and k is less than or equal to n-2;
the state information used by the recovery process is determined according to the values of k and m, specifically: if k is less than or equal to m, s is k The corresponding state information is used as the state information used by the recovery process; otherwise, will s m The corresponding state information is used as state information for the recovery process.
2. The device of claim 1, wherein the infant breathing device entering a secure mode means that a user process is not loaded, and a configuration file configured in advance is loaded in a system process, and the system process controls operation of the infant breathing device according to the configured configuration file.
3. The device of claim 2, further comprising, after the infant breathing device enters the safe mode: and clearing the data stored in the watchdog module, and restarting the watchdog module.
4. The device according to claim 1, wherein the storing of the state information of the specified process in the nonvolatile storage medium when the preset condition is satisfied is specifically:
and periodically acquiring the data change amount of the stack and the data change amount of the data segment of each process in the designated process, and when any one of the data change amount of the stack and the data change amount of the data segment is larger than a second threshold value, executing the operation of storing the state information of the designated process into the nonvolatile storage medium.
5. The apparatus of claim 1, wherein the specified course refers to a course using a user-set parameter that is one or more of maximum inspiratory pressure, positive end-expiratory pressure, continuous positive pressure breathing, oxygen concentration, flow of ventilation, inspiratory pressure, expiratory pressure, inspiratory time, and expiratory time.
6. The device according to claim 1, wherein the time for sending the restart signal in a period of time stored in the watchdog module is sent to the microprocessor in a preset time after restarting the infant breathing device, specifically: after init is completed, before the watchdog is opened, an instruction for reading the storage content of the watchdog is sent, and the time for sending a restart signal in a period of time stored by the watchdog module is sent to the microprocessor.
7. A highly available infant respiratory system, characterized in that the system comprises a power supply, a warming humidifier, an air hose and a device according to any one of claims 1-6.
8. A highly available infant respiratory system, characterized in that the system comprises a server and the device according to any one of claims 1-6; the device and the server transmit data over a network.
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| US8364844B2 (en) * | 2009-11-13 | 2013-01-29 | International Business Machines Corporation | Deadlock-free class routes for collective communications embedded in a multi-dimensional torus network |
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