CN115080304A

CN115080304A - Working data backup system and working data backup method thereof

Info

Publication number: CN115080304A
Application number: CN202110269790.3A
Authority: CN
Inventors: 应建俊; 张军; 陈凯健
Original assignee: Jiangsu Hailai Xinchuang Medical Technology Co Ltd
Current assignee: Jiangsu Hailai Xinchuang Medical Technology Co Ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2022-09-20

Abstract

The invention provides a working data backup system, comprising: a RAM unit configured to store system runtime data; an external storage unit configured to store the work data; the Flash storage unit is configured to store the operation codes and backup and store the working data; the MCU control unit is configured to run codes to receive the working data from the outside and store the working data into the Flash storage unit and the external storage unit; a power supply unit configured to supply power to the system. The invention also provides a working data backup method according to the working data backup system.

Description

Working data backup system and working data backup method thereof

Technical Field

The present invention relates to an electronic system, and more particularly, to a working data backup system and a working data backup method thereof.

Background

The working data of the medical equipment in operation needs to be stored, so that the operation condition of the equipment can be obtained by reading the stored working data when the operation condition of the equipment is counted at a later period. The working data storage generally uses a solid state disk, an external storage chip, cloud storage, a U disk and an SD card. The solid state disk is not suitable due to the factors of space and cost; in consideration of security of medical equipment, cloud storage, a USB flash disk and an SD card are not suitable, and an external storage chip is small in size, high in cost performance and located inside the equipment, so that the external storage chip is selected for storing working data. When the equipment is abnormally powered off, the working data can not be stored in time, so that the working data can be lost, and therefore the working data needs to be stored at regular time when the equipment works (for example, the working data is stored once when the equipment works for 10 minutes); the equipment is carried by a user, and the working data cannot be uploaded to the working data center in real time, so that the working data can be accumulated and stored in the equipment, and the capacity of an external storage chip for storing the working data needs to be large or a plurality of external storage chips are needed; there are some problems, such as the damage of the external memory chip or the error of the working data storage, the abnormal working data derived, and the working condition of the device can not be tracked.

The statements in the background section are merely prior art as they are known to the inventors and do not, of course, represent prior art in the field.

Disclosure of Invention

To address one or more of the problems with the prior art, the present invention provides a working data backup system, comprising: a RAM unit configured to store system runtime data; an external storage unit configured to store the work data; the Flash storage unit is configured to store the operation codes and backup and store the working data; the MCU control unit is configured to run codes to receive the working data from the outside and store the working data into the Flash storage unit and the external storage unit; a power supply unit configured to supply power to the system.

According to one aspect of the invention, the external storage unit is an electrically erasable programmable memory EEPROM.

According to an aspect of the present invention, the external memory unit is a NAND flash memory.

According to one aspect of the invention, the Flash memory unit is an electrically erasable programmable memory EEPROM.

According to one aspect of the invention, the Flash memory unit is a NOR Flash memory.

The invention also provides a working data backup method of the working data backup system, which comprises the following steps: when the working data are acquired from the outside, the working data are simultaneously stored in the external storage unit and the Flash storage unit; and when the system is restarted, recovering the system working data.

According to one aspect of the present invention, the step of recovering the system working data includes checking the working data in the external storage unit and the Flash storage unit, and if the working data in the external storage unit is normal and the working data in the Flash storage unit is abnormal, overwriting the working data in the Flash storage unit with the working data in the external storage unit; and if the working data in the Flash storage unit is normal and the working data in the external storage unit is abnormal, covering the working data in the external storage unit with the working data in the Flash storage unit.

According to one aspect of the invention, the working data comprises a sequence number, and the sequence number of each piece of working data generated during normal operation of the system is the same.

According to one aspect of the present invention, the step of restoring the system working data includes retaining only the last working data of the plurality of working data of the same sequence number and erasing the other working data.

The invention aims to use the least external storage chip to combine with the spare capacity of a Flash storage unit, store working data, backup one piece of working data, execute the storage of the working data at regular time and the backup action of the working data in time, avoid the loss of the working data and ensure the effectiveness of the working data of later statistical equipment. Meanwhile, the hardware cost of the equipment is reduced, the working data and the backup working data are not in the same chip when the least external storage chip (only one chip is used) is used, and the reliability and recoverability of the working data and the system are ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a system block diagram of a working data backup system according to the present invention;

FIG. 2 is a schematic diagram of storing the working data in the external storage unit and the Flash storage unit simultaneously according to the working data backup method of the present invention; and

fig. 3 is a schematic diagram showing the working data in the working data backup system and the working data backup method according to the present invention.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like are used in the orientations and positional relationships indicated in the drawings, which are merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection, either mechanically, electrically, or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

The invention provides a working data backup system, comprising: a RAM unit configured to store system runtime data; an external storage unit configured to store the work data; the Flash storage unit is configured to store the operation codes and backup and store the working data; the MCU control unit is configured to run codes to receive the working data from the outside and store the working data into the Flash storage unit and the external storage unit; a power supply unit configured to supply power to the system.

Specifically, FIG. 1 is a system block diagram of a working data backup system according to the present invention. The working data backup system comprises an MCU control unit, a Flash storage unit, an external storage unit, an RAM unit and a power supply unit. The MCU control unit has the function of running codes, receives working data from the outside and stores the working data into the Flash storage unit and the external storage unit at the same time. The Flash storage unit has the functions of storing running codes and backing up and storing working data (similar to a hard disk). The RAM unit functions as a temporary working data area (similar to a running memory) when the system runs. The storage capacity of the current Flash storage unit is generally 1Mbyte (byte is byte, the minimum unit of working data storage) or more, the running code is generally (100-200) Kbyte, and the utilization rate of the Flash storage unit is only about 20%; because the Flash storage unit only stores the codes for use, the MCU control unit executes the code operation, and the temporary working data is placed in the RAM unit, the idle capacity of the Flash storage unit is occupied, and the performance of the system operation is not influenced. The Flash memory unit needs to reserve a code storage area with about 100Kbyte for updating the device function or bug patch. Therefore, the spare capacity of the Flash storage unit can be used for backup of working data; one piece of external memory chip can be used as the memory working data (area a) and the Flash memory unit as the backup working data (area B). Under the original hardware frame, the purposes of storing working data and storing backup working data are achieved, and meanwhile, the working data and the backup working data are stored in different chips, so that the reliability and recoverability of the working data and a system are guaranteed.

Specifically, Flash has the performance of electrically erasable programmable read-only memory (EEPROM), and can quickly read working data without losing working data due to power failure. It can be divided into NAND Flash and NOR Flash. NOR Flash has a faster read speed than NAND Flash, but has a capacity inferior to NAND Flash and is also more expensive. The NAND Flash has higher density and can be used for storing big data. The characteristics of the Flash memory are that when working data is read, the working data can be directly read according to a minimum 1byte unit without condition limitation, but the data writing can be carried out only by needing specific conditions: when a certain address needs to be written with working data, a sector to which the certain address belongs needs to be erased firstly, all the working data of each byte in the sector is turned into FF, and then the working data can be written; the erased sector can be written with working data according to a minimum 4byte unit; however, the minimum unit for erasing is a sector, Flash with different capacity, and the sector is also different, for example, the size of the sector may be 2Kbyte, 4Kbyte, 64Kbyte, 128Kbyte, etc. If the Flash memory unit is 1Mbyte, the minimum sector size may be 128 Kbyte;

the spare unit 640Kbyte of the device Flash memory unit may be used, for example, as a backup for working data. For example, if the working data occupies 16 bytes, 144 pieces of working data need to be saved in the case of storing the working data once in 10 minutes and fully working for 24 hours in a day. The free storage space of the Flash storage unit is 640Kbyte × 1024 ═ 655360byte, 655360(byte)/16 (byte/bar) ═ 40960 (bar), that is, 40960 working data can be stored in the free Flash storage unit. 40960 (bars)/144 (bars/day) 284 (days), that is, the free storage space of the Flash storage unit can be used by the working data backup system of the present invention to continuously store the working data for 284 days. It can be seen that this backup time (284 days) meets the device post-job data statistics requirements.

According to an aspect of the present invention, a working data backup method of the working data backup system includes: when the working data are acquired from the outside, the working data are simultaneously stored in the external storage unit and the Flash storage unit; and when the system is restarted, recovering the system working data.

Specifically, fig. 2 is a schematic diagram illustrating that the working data is simultaneously stored in the external storage unit and the Flash storage unit in the working data backup method according to the present invention. The treatment equipment needs to be carried by a patient when working, the working time of each day cannot be less than 18 hours, the working time data of the equipment needs to be recorded in the working process, the working time of the equipment is in direct proportion to the treatment effect, the working time of the equipment needs to be known within one period of working time (generally 1 month), and therefore the working data stored by the equipment needs to be read for statistics.

Fig. 3 is a schematic diagram showing the working data in the working data backup system and the working data backup method according to the present invention. As can be seen in FIG. 3, the device on-time data contains a sequence number, start-up time, result time, on-time length, and CRC16 check, totaling 16 bytes. The external storage unit and the Flash storage unit can adopt a NAND Flash (W25Q128BV) chip, the chip divides the capacity of 16M (8M) into 256(128) blocks (Block), the size of each Block is 64K bytes, each Block is divided into 16 sectors (sectors), and each Sector has 4K bytes. The minimum unit of erase is one sector, i.e. 4 kbytes must be erased at a time. For example, the storage capacity of the external storage unit is 16Mbyte as the working data (area a), the minimum sector is 128Kbyte, and therefore the minimum erase unit is 128 Kbyte. The Flash memory unit free area selects 640Kbyte (occupying 62.5%) as the working data backup (area B), the minimum sector is 128Kbyte, and the minimum erasing unit is 128 Kbyte. The working data is stored for 10 minutes during the operation of the equipment, if the set time is too short, the data volume to be stored is too large, for example, if the working data is stored for 1 minute, the data volume to be stored is 10 times of the original data volume; however, if the setting time is too long, the lost working time after the abnormal power failure of the equipment is too long, for example, if 1 hour of working data is selected to be stored, the abnormal power failure occurs when the equipment works for 50 minutes, and the system does not timely store the working data, namely, the working time of 50 minutes is not stored (50 minutes accounts for 3.5% of 18 hours, the proportion is large, but 10 minutes accounts for 0.7% of 18 hours, the proportion is small). Therefore, the period of 10 minutes is suitable for storing working data once.

Specifically, after the device starts to work, when the device works for 10 minutes, the MCU control unit stores the working data in the area A and backups the working data in the area B. The initial sequence number of the working data storage is 1 (the device sequence number starts from 1), the sequence number is increased by 1 once the device is rebooted, and the maximum sequence number is 65535. During the operation of the equipment, the working data is stored every 10 minutes, but the serial number is not increased. For example, when the apparatus is continuously operated without interruption, the operation data is stored with the serial number 1, that is, the serial numbers of the operation data stored every 10 minutes are all 1. For the working data with the same serial number, the starting time is unchanged (the starting time of the system at this time), and the ending time is the current storage time for storing the working data each time. Under the condition that the system continuously works for 60 minutes, the system already stores 6 pieces of working data with the serial number of 1, namely, the 6 th piece of working data is the latest working data, and the 5 pieces of working data stored previously are in-process working data. The working data backup system can record necessary working data information of the equipment in the working time length only by storing the 6 th working data.

Specifically, when the next time the device starts to work, the working data backup system judges whether the serial numbers of the plurality of pieces of working data stored in the external storage unit and the Flash storage unit are consistent, if so, the last piece of working data is read, all the working data with the same serial number in the front are deleted, and then only the last piece of working data is stored (the working data with the serial numbers of 1 are read, the working data in the first 5 processes are removed, and only the latest working data in the 6 th process are stored), so that the space for storing the working data can be reduced while the complete working data are stored.

The NAND Flash has a limited number of erasing times per sector (after erasing 10 ten thousand times, the reliability of stored working data is reduced), so that the number of erasing times of the sector needs to be reduced as much as possible. If the erase save is repeated at the same 16byte address, then the sector is erased and saved every 10 minutes in 60 minutes of operation, thus resulting in 6 erasures. In the case that a sector of 128 kbytes can hold 8192 pieces of working data, it means that the sector is erased 8192 times. If 6 pieces of working data are saved first (the erased sector does not erase the entire sector during saving the working data, but several pieces of working data are stored in the sector in sequence). Waiting for the next time the job is turned on, the system erases this sector: and erasing the whole sector, deleting the first 5 pieces of working data, and only storing the 6 th latest working data in the sector. In this case, only one erase operation needs to be performed on the sector, i.e., the erase count of the sector is 1/6 times the original erase count. The backup working data B area is also operated as such. If the system is operated continuously for 24 hours a day, 10 minutes a day, 144 pieces of operating data (i.e. 24 (hours/day) × 60 (minutes/hours)/10 (minutes/times) ═ 144 (times/days)) need to be saved. In the case where the space of the backup working data B area is 640Kbyte, 40960 pieces of working data, that is, 284 days of working data, can be saved in the backup working data B area because each piece of working data is 16 Kbyte.

Specifically, when the device is powered on again and initialized for some reason, the working data stored in the external storage unit and the Flash storage unit need to be read, and CRC16 check comparison is performed to analyze whether the working data stored in the external storage unit and the Flash storage unit are abnormal. If a certain piece of working data in the external storage unit is abnormal, the serial number of the working data is recorded, and after all stored working data are scanned, the working data with the corresponding serial number are read from the backup area to be replaced. If the working data of the original storage A area are all abnormal, initializing the external storage chip, and restoring all backup B area working data into the A area. If the working data of the backup B area is abnormal, the original working data of the A area needs to be copied into the backup B area, and the working data is ensured not to be lost.

Therefore, the working data backup system and the working data backup method thereof use the least external storage chip in combination with the spare capacity of the Flash storage unit, store the working data, backup one piece of working data, execute the timed working data storage and the timely working data backup action, avoid the loss of the working data and ensure the effectiveness of the working data of the later statistical equipment. Meanwhile, the hardware cost of the equipment is reduced, the working data and the backup working data are not in the same chip when the least external storage chip (only one chip is used) is used, and the reliability and recoverability of the working data and the system are ensured.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A working data backup system comprising:

a RAM unit configured to store system runtime data;

an external storage unit configured to store the work data;

the Flash storage unit is configured to store the operation codes and backup and store the working data;

the MCU control unit is configured to run codes to receive the working data from the outside and store the working data into the Flash storage unit and the external storage unit;

a power supply unit configured to supply power to the system.

2. The working data backup system according to claim 1, characterized in that the external memory unit is an electrically erasable programmable memory EEPROM.

3. The working data backup system according to claim 2, characterized in that the external storage unit is a NAND flash memory.

4. The working data backup system according to claim 1, characterized in that the Flash memory unit is an electrically erasable programmable memory EEPROM.

5. The working data backup system according to claim 4, characterized in that the Flash memory unit is a NOR Flash memory.

6. A working data backup method of a working data backup system according to claim 1, comprising:

when the working data are acquired from the outside, the working data are simultaneously stored in the external storage unit and the Flash storage unit;

and when the system is restarted, recovering the system working data.

7. The method for backing up work data according to claim 6, wherein the step of restoring the system work data includes checking the work data in the external storage unit and the Flash storage unit,

if the working data in the external storage unit is normal and the working data in the Flash storage unit is abnormal, covering the working data in the Flash storage unit with the working data in the external storage unit;

and if the working data in the Flash storage unit is normal and the working data in the external storage unit is abnormal, covering the working data in the external storage unit with the working data in the Flash storage unit.

8. The method for backing up working data according to claim 6, wherein the working data comprises serial numbers, and the serial number of each piece of working data generated during normal operation of the system is the same.

9. The method for backing up working data according to claim 8, wherein the step of restoring the working data of the system includes retaining only the last working data of the plurality of pieces of working data having the same sequence number and erasing the other pieces of working data.