CN106539575B - A kind of secure device and method of free drive ambulatory blood pressure logger measurement data - Google Patents
A kind of secure device and method of free drive ambulatory blood pressure logger measurement data Download PDFInfo
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- CN106539575B CN106539575B CN201610948487.5A CN201610948487A CN106539575B CN 106539575 B CN106539575 B CN 106539575B CN 201610948487 A CN201610948487 A CN 201610948487A CN 106539575 B CN106539575 B CN 106539575B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/02141—Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits
Abstract
A kind of free drive ambulatory blood pressure logger measurement data protective device and method; the I/O port of device microcontroller is connected with the control terminal of program-controlled tristate bus line isolation controller, NAND flash storage and USB bulk memory controller respectively; the port of program-controlled tristate bus line isolation controller is connected with NAND flash storage and USB bulk memory controller respectively, and USB bulk memory controller is connected with USB interface and communicates with PC machine.Device based on the hardware configuration; and combine the integrated application of bad block management technology, data backup memory technology, data check technology, data storage management technology; reach the protection to ambulatory blood pressure measurement data and saves from damage; reduce the equipment fault due to caused by memory; the efficiency of patients' blood's monitoring is improved, the success rate of ambulatory blood pressure measurement is improved；The Implementation of Embedded System acquisition of blood pressure signal, processing and the storage combined by hardware and software；The wherein high data storage of reliability requirement is not allow to malfunction, it is necessary to the ambulatory blood pressure data acquired be protected not cause to lose because of the self reason of equipment as much as possible.
Description
Technical field
The invention belongs to Medical Instruments technical field, in particular to a kind of free drive ambulatory blood pressure logger measures measurement data
Secure device and method.
Background technique
Hypertension is the most common cardiovascular disease, is that cerebral apoplexy, heart failure, myocardial infarction, renal insufficiency etc. are serious
The most important risk factor of disease.According to the 4th National Nutrient and health survey in 2002, China >=18 year old high blood of adult
Pressing illness rate is 18.8%, wherein >=60 years old the elderly's illness rate is up to 49.1%.Currently, China >=18 year old population > 1,100,000,000,
>=60 years old population > 200,000,000 show according to the data of " Chinese cardiovascular disease report 2014 ", and China hypertensive patient nearly 300,000,000.Such as
Fruit can diagnose in time, and carry out Treatment of Hypertension using various types of antihypertensive drugs, and blood pressure can be effectively controlled, reduce the various hearts
The incidence of cerebrovascular complication.But because hypertensive patient's number is huge, need more to rely on Creative Science and Technology Co. Ltd, good height could be managed
Blood pressure reduces its huge cardiovascular risk born.
Ambulatory blood pressure monitoring is the great innovation in hypertension diagnosis technograph.It can measure personal daily life
Blood pressure under state both can measure blood pressure light, under moderate physical exertion state, and also can measure the blood pressure in sleep procedure, because
And can more acurrate, more fully reflect the blood pressure overall condition of a people, it finds " Masked hypertension ", including simple night is high
Blood pressure.Ambulatory blood pressure monitoring is automatically performed by survey meter of blood pressure, thus also can avoid " white coat phenomenon ".Such as carry out one round the clock
24 hours ambulatory blood pressure monitorings, it can also be appreciated that the variation tendency of blood pressure, including blood pressure night decline situation；When from morning
Rising condition；And one round the clock in blood pressure overall variability situation.Therefore, ambulatory blood pressure monitoring has become hypertension management not
The detection means that can or lack, identification and diagnosis for hypertension；For assessing cardiovascular and cerebrovascular risk；For assessing Treatment of Hypertension
Effect.Currently, Britain and Canadian hypertension administration guide clearly suggest that Clinical blood pressure is within the scope of 1,2 grade of hypertension, i.e.,
Systolic pressure 140~179,90~109mmHg of diastolic pressure (1mmHg=0.133kPa), the outer blood pressure measurement of Ying Jinhang consulting room is to high blood
Pressure is made a definite diagnosis, preferred ambulatory blood pressure monitoring, if the blood pressure >=135/85mmHg on daytime of ambulatory blood pressure monitoring, diagnosable high blood
Pressure.
Ambulatory blood pressure is being increasingly becoming hypertension and is managing indispensable diagnosis detection means.The number of ambulatory blood pressure equipment
Then become particularly important according to the reliability of acquisition, the data of usual ambulatory blood pressure measurement are by nonvolatile memory NAND
Flash Memory, wherein by measurement result storage；However as the NAND Flash Memory of storage equipment, there is born
Defect, Nand Flash is due to its physical characteristic, only limited erasable number, is more than that number, is basically bad
?.In use, the block of some Nand Flash will appear the case where being damaged, and when there is bad block, send out in time
It now and by this block is labeled as bad block, is not used.In the extremely important ambulatory blood pressure logger course of work, how to have
Effect will prevent the missing measurement phenomenon due to caused by the appearance of Flash bad block, to avoid important medical data is lost,
Save medical data from damage, becomes ambulatory blood pressure product technical application problem urgently to be resolved.
The general free drive scheme of ambulatory blood pressure logger is completed to set by the way of SD card controller, SD card, microcontroller
Standby data store and transmit.Either microcontroller or PC machine must all be managed SD card by SD card controller,
Especially bottom operation management is completed by SD card controller.Microcontroller can not carry out bottom operation to SD card, this is just
SD card is caused if there is part bad cluster or bad block, then all already present data cannot be effectively retained and be read
It takes；This situation will result directly in the loss of analysis of ambulatory blood pressure measurement data.
Summary of the invention
In order to overcome the defect of existing NAND Flash Memory technology and be deposited using the equipment of general free drive conceptual design
The problem of, the present invention provides the secure device and method of a kind of free drive ambulatory blood pressure logger measurement data；Based on the hardware
The device of structure, and combine bad block management technology, data backup memory technology, data check technology, data storage management technology
Integrated application, reach the protection to ambulatory blood pressure measurement data and save from damage, reduce the equipment fault due to caused by memory, mention
The efficiency of high patients' blood's monitoring, improves the success rate of ambulatory blood pressure measurement；The embedded system combined by hardware and software
Realize the acquisition, processing and storage of blood pressure signal；The wherein high data storage of reliability requirement is not allow to malfunction, it is necessary to the greatest extent
The ambulatory blood pressure data acquired are possibly protected not cause to lose because of the self reason of equipment.
In order to achieve the above object, the technical solution of the present invention is as follows:
A kind of free drive ambulatory blood pressure logger measurement data protective device, including microcontroller 101, the IO of controller 101
Port respectively with program-controlled tristate bus line isolation controller 102, NAND flash storage 301 and USB bulk memory controller
302 control terminal is connected, the port of program-controlled tristate bus line isolation controller 102 respectively with NAND flash storage 301 and
USB bulk memory controller 302 is connected, and USB bulk memory controller 302 is connected with USB interface 303 and and PC machine
Communication, the AD input terminal of microcontroller 101 are connect with the output end of blood pressure signal conditioning circuit 202, blood pressure signal conditioning circuit
202 input terminals are connect with the output of pressure sensor 201.
The microcontroller 101 realizes the direct operation to NAND flash storage 301 by IO bus mode,
The operation to flash storage minimum memory unit can be completed in this way, ensure that storing data is storing
When bad block, the data for obtaining maximum possible are saved from damage；Microcontroller 101 is when operating the storage of NAND flash storage 301, strictly
Carried out according to FAT16 call format, it is ensured that the data of ambulatory blood pressure logger record be accurately written to fixed file and
In address, backup has the area MBR information, FAT area, the area DIR information in microcontroller 101, has to NAND flash storage 301
According to FAT16 formatted function.
The storage format of the NAND flash storage 301 is the file storage protocol requirement for meeting FAT16, works as dress
It sets when detecting that bad block or logical format mistake occurs in NAND flash storage 301, microcontroller 101 can be to NAND Flash
Memory 301 carries out FAT16 formatting processing, and re-writes logger configuration file, and logger is made to automatically restore to factory
Mode.
PC machine is connect by the USB interface 303 with USB bulk memory controller 302, is realized to NAND Flash
The access of memory 301；USB bulk memory controller 302 is compatible with USB Mass Storage agreement, realizes equipment and PC machine
Driving function is exempted from communication.
Based on a kind of above-mentioned security method of free drive ambulatory blood pressure logger measurement data protective device, including following two
Situation:
The first situation: after 101 electrifying startup of microcontroller, it is found that the blood pressure data of acquisition does not transmit, logger is quasi-
Standby to enter data readback mode, then program-controlled tristate bus line isolation controller 102 is placed in high-impedance state, realizes 101 He of microcontroller
The isolation of USB bulk memory controller (USB flash disk controller) 302, avoids microcontroller 101 and USB bulk memory controller
302 occur operation conflict, and protect the USB bulk memory controller 302 of off working state；Microcontroller 101 obtains NAND
After 301 control of flash storage, read in NAND flash storage 301 and the area MBR information and generate its MD5 code, then with
The MD5 of MBR backup information in microcontroller 101 is compared；101 area Zhong MBR of microcontroller is believed if inconsistent
Breath is written in NAND flash storage 301；Verification FAT area information is read if consistent, if wrong, by backup
FAT area information rewriting reads the verification area DIR information, if wrong, by the area the DIR information weight of backup to FAT area if correct
Write the area DIR；After the completion of above-mentioned work, carry out check the area DATA, due to the space in the area DATA need in the application repeatedly it is erasable,
It is used by long-time, which can continuously emerge storage bad block, cause can not being written and reading for data；It is micro- by checking
Controller can read and find existing Flash bad block, record to these bad blocks, and be converted into bad cluster information, with FAT
The bad cluster information of record in table is compared, if unanimously, preparing to read data, if it is inconsistent, FAT table is rewritten,
Then it reenters and reads FAT area information.After the completion of above-mentioned work, microcontroller 101 changes program-controlled tristate bus line isolation control
102 working condition of device processed, and by all controls being connect with NAND flash storage 301 of microcontroller 101 and PORT COM
It is set to input state, such USB bulk memory controller 302 can operate NAND flash storage 301, read
Ambulatory blood pressure records data；The operation meets FAT16 agreement；Microcontroller 101 can record the above operation；
Second situation: after 101 electrifying startup of microcontroller, it is found that the blood pressure data of acquisition is transmitted, logger is quasi-
Standby to enter collecting work mode, then microcontroller 101 cuts off USB bulk memory controller 302 and powers, and program-controlled tri-state is total
Line isolation controller 102 is placed in high-impedance state, protects the USB bulk memory controller 302 of off working state；Meanwhile micro-control
Device 101 processed reads the operation note of the information area, if the not record about the modification various information of memory, logger enter
Normal collecting work mode；The record for modifying memorizer information if it exists, then microcontroller 101 will be considered that in NAND
301 bad block of flash storage and logic error；Ambulatory blood pressure logger can automatically into arrive self state, microcontroller
101 starting formatted programs, are formatted NAND flash storage 301 according to the format of FAT16, and formatting
The ambulatory blood pressure logger configuration information of backup is recalled from the information area of microcontroller 101, is wanted according to FAT16 by Cheng Hou
The file storage location of the file format and ambulatory blood pressure logger requirement asked, file needed for logger is written to one by one
In NAND flash storage 301；Then, ambulatory blood pressure logger enters collecting work mode；It will without End-Customer
NAND flash storage 301 has the ambulatory blood pressure logger depot repair of bad block and logic error.
The present invention is that the ambulatory blood pressure logger course of work is important, the part that can't lack, it is ambulatory blood pressure note
The important support of offer of device reliability and validity operation is provided.
Beneficial effects of the present invention:
1) the new bad block occurred in equipment autonomously discovery NAND Flash, and timely update bad block and FAT table are carried out, guarantee
Effective reading of data with existing.
2) microcontroller 101 of logger can independently carry out recorder data storage formatting, then automatically into work
Operation mode greatly reduces the depot repair number of ambulatory blood pressure logger, improves the reliability and service efficiency of product.
Detailed description of the invention
Fig. 1 is module frame chart of the invention.
Fig. 2 is work flow diagram of the invention.
Specific embodiment
It elaborates with reference to the accompanying drawing to the principle of the present invention.
Referring to Fig. 1, a kind of free drive ambulatory blood pressure logger measurement data protective device, including microcontroller 101, program-controlled three
State Bus isolation controller 102, NAND Flash storage circuit 301, USB bulk memory controller 302.
The I/O port of microcontroller 101 respectively with program-controlled tristate bus line isolation controller 102, NAND flash storage
The control terminal of 301 and USB bulk memory controller 302 is connected, the port difference of program-controlled tristate bus line isolation controller 102
Be connected with NAND flash storage 301 and USB bulk memory controller 302, USB bulk memory controller 302 with
USB interface 303 is connected, and communicates with PC machine, the output of the AD input terminal and blood pressure signal conditioning circuit 202 of microcontroller 101
End connection, 202 input terminal of blood pressure signal conditioning circuit are connect with the output of pressure sensor 201.
The microcontroller 101 realizes the direct operation to NAND flash storage 301 by IO bus mode,
The operation to flash storage minimum memory unit can be completed in this way, ensure that storing data is storing
When bad block, the data for obtaining maximum possible are saved from damage；Microcontroller 101 is when operating the storage of NAND flash storage 301, strictly
Carried out according to FAT16 call format, it is ensured that the data of ambulatory blood pressure logger record be accurately written to fixed file and
In address, backup has the area MBR information, FAT area, the area DIR information in microcontroller 101, has to NAND flash storage 301
According to FAT16 formatted function.
The storage format of the NAND flash storage 301 is the file storage protocol requirement for meeting FAT16, works as dress
It sets when detecting that bad block or logical format mistake occurs in NAND flash storage 301, microcontroller 101 can be to NAND Flash
Memory 301 carries out FAT16 formatting processing, and re-writes logger configuration file, and logger is made to automatically restore to factory
Mode.
PC machine is connect by the USB interface 303 with USB bulk memory controller 302, is realized to NAND Flash
The access of memory 301；USB bulk memory controller 302 is compatible with USB Mass Storage agreement, realizes equipment and PC machine
Driving function is exempted from communication.
The working principle of the present apparatus are as follows: ambulatory blood pressure logger is started to work after power, and the operation to storage section is
Carried out with following process: after 101 electrifying startup of microcontroller, program-controlled tristate bus line isolation controller 102 is in high-impedance state, real
The isolation of existing microcontroller 101 and USB bulk memory controller 302, makes USB bulk memory controller 302 at this time cannot
The implementation of NAND flash storage 301 is controled and operated, microcontroller 101 and USB bulk memory controller 302 is avoided to send out
Raw operation conflict, and protect the USB bulk memory controller 302 of off working state；Microcontroller 101 obtains NAND Flash
After 301 control of memory, read in NAND flash storage 301 and the area MBR information and generate its MD5 code, then with micro-control
The MD5 code of MBR backup information in device 101 processed is compared；By 101 area Zhong MBR information of microcontroller if inconsistent
It is written in NAND flash storage 301.Verification FAT area information is read if consistent, if wrong, by the FAT of backup
Area's information rewriting reads the verification area DIR information, if wrong, by the area the DIR information rewriting of backup to FAT area if correct
To the area DIR；It after the completion of above-mentioned work, carries out checking the area DATA, since the space in the area DATA needs repeatedly erasable, warp in the application
It crosses and uses for a long time, which can continuously emerge storage bad block, cause can not being written and reading for data；By checking, micro-control
Device processed can read and find existing Flash bad block, record to these bad blocks, and be converted into bad cluster information, with FAT table
In the bad cluster information of record be compared, if unanimously, preparing to read data, if it is inconsistent, rewriting FAT table, so
After reenter read FAT area information.After the completion of current operation, then prepare to read data.
In 301 bad block of NAND flash storage and logic error, ambulatory blood pressure logger enters self shape
State, the microcontroller 101 in device start formatted program, carry out according to the format of FAT16 to NAND flash storage 301
It formats, and after the completion of formatting, by the ambulatory blood pressure logger configuration information of backup from the information area of microcontroller 101
It recalls, it, will be needed for logger according to the file storage location that the desired file format of FAT16 and ambulatory blood pressure logger require
File be written in NAND flash storage 301 one by one；Then, ambulatory blood pressure logger enters operating mode；And nothing
The ambulatory blood pressure logger depot repair for needing End-Customer that will have bad block and logic error.
The microcontroller that the device of the invention efficiently solves usual structure dynamics blood pressure recorder can not be directly to depositing
Reservoir carries out bottom operation, can not find occur new bad block in NAND flash storage, can not handle in time and update bad block
Label and FAT table, it cannot be guaranteed that the validity and readability of data with existing.
Based on a kind of above-mentioned security method of free drive ambulatory blood pressure logger measurement data protective device, including following two
Situation:
Referring to Fig. 2, the first situation: after 101 electrifying startup of microcontroller, it is found that the blood pressure data of acquisition does not transmit,
Logger is prepared to enter into data readback mode, then program-controlled tristate bus line isolation controller 102 is placed in high-impedance state, realizes microcontroller
The isolation of device 101 and USB bulk memory controller (USB flash disk controller) 302, avoids microcontroller 101 and USB massive store
Operation conflict occurs for controller 302, and protects the USB bulk memory controller 302 of off working state；Microcontroller 101 obtains
After obtaining 301 control of NAND flash storage, reads the area MBR information in NAND flash storage 301 and generate its MD5
Code, is then compared with the MD5 of the MBR backup information in microcontroller 101；It will be in microcontroller 101 if inconsistent
The area MBR information be written in NAND flash storage 301；Verification FAT area information is read if consistent, if wrong,
By the FAT area information rewriting of backup to FAT area, the verification area DIR information is read if correct, if wrong, by the DIR of backup
Area's information rewriting is to the area DIR；After the completion of above-mentioned work, carry out checking the area DATA, since the space in the area DATA needs in the application
It is repeatedly erasable, it is used by long-time, which can continuously emerge storage bad block, cause can not being written and reading for data；It is logical
Inspection is crossed, microcontroller can read and find existing Flash bad block, record to these bad blocks, and be converted into bad cluster
Information is compared with the bad cluster information of the record in FAT table, if unanimously, preparing to read data, if it is inconsistent,
FAT table is rewritten, then reenters and reads FAT area information.After the completion of above-mentioned work, microcontroller 101 changes program-controlled tri-state
102 working condition of Bus isolation controller, and by all controls being connect with NAND flash storage 301 of microcontroller 101
Be set to input state with PORT COM, such USB bulk memory controller 302 can to NAND flash storage 301 into
Row operation reads ambulatory blood pressure and records data；The operation meets FAT16 agreement；Microcontroller 101 can remember the above operation
Record.
Second situation: after 101 electrifying startup of microcontroller, it is found that the blood pressure data of acquisition is transmitted, logger is quasi-
Standby to enter collecting work mode, then microcontroller 101 cuts off USB bulk memory controller 302 and powers, and program-controlled tri-state is total
Line isolation controller 102 is placed in high-impedance state, protects the USB bulk memory controller 302 of off working state；Meanwhile micro-control
Device 101 processed reads the operation note of the information area, if the not record about the modification various information of memory, logger enter
Normal collecting work mode；The record for modifying memorizer information if it exists, then microcontroller 101 will be considered that in NAND
301 bad block of flash storage and logic error；Ambulatory blood pressure logger can automatically into arrive self state, microcontroller
101 starting formatted programs, are formatted NAND flash storage 301 according to the format of FAT16, and formatting
The ambulatory blood pressure logger configuration information of backup is recalled from the information area of microcontroller 101, is wanted according to FAT16 by Cheng Hou
The file storage location of the file format and ambulatory blood pressure logger requirement asked, file needed for logger is written to one by one
In NAND flash storage 301；Then, ambulatory blood pressure logger enters collecting work mode；It will without End-Customer
NAND flash storage 301 has the ambulatory blood pressure logger depot repair of bad block and logic error.
Claims (4)
1. a kind of security method of free drive ambulatory blood pressure logger measurement data protective device, the device being based on includes microcontroller
Device (101), the I/O port of microcontroller 101 respectively with program-controlled tristate bus line isolation controller (102), NAND flash storage
(301) and the control terminal of USB bulk memory controller (302) is connected, the end of program-controlled tristate bus line isolation controller (102)
Mouth is connected with NAND flash storage (301) and USB bulk memory controller (302) respectively, USB massive store control
Device (302) processed is connected with USB interface (303) and communicates with PC machine, the AD input terminal and blood pressure signal tune of microcontroller (101)
The output end connection of circuit (202) is managed, the output of blood pressure signal conditioning circuit (202) input terminal and pressure sensor (201) connects
It connects, which is characterized in that its security method includes following two situation:
The first situation: after microcontroller (101) electrifying startup, it is found that the blood pressure data of acquisition does not transmit, logger prepares
Into data readback mode, then program-controlled tristate bus line isolation controller 102 is placed in high-impedance state, realize microcontroller (101) and
The isolation of USB bulk memory controller (302) avoids microcontroller (101) and USB bulk memory controller (302) from sending out
Raw operation conflict, and protect the USB bulk memory controller (302) of off working state；Microcontroller (101) obtains NAND
After flash storage (301) control, reads the area MBR information in NAND flash storage (301) and generate its MD5 code, so
It is compared afterwards with the MD5 of the MBR backup information in microcontroller (101)；It will be in microcontroller (101) if inconsistent
The area MBR information is written in NAND flash storage (301)；Verification FAT area information is read if consistent, if wrong,
By the FAT area information rewriting of backup to FAT area, the verification area DIR information is read if correct, if wrong, by the DIR of backup
Area's information rewriting is to the area DIR；After the completion of above-mentioned work, carry out checking the area DATA, since the space in the area DATA needs in the application
It is repeatedly erasable, it is used by long-time, which can continuously emerge storage bad block, cause can not being written and reading for data；
By checking, microcontroller can read and find existing Flash bad block, record to these bad blocks, and be converted into bad
Cluster information is compared with the bad cluster information of the record in FAT table, if unanimously, preparing to read data, if inconsistent,
FAT table is then rewritten, then reenters and reads FAT area information；After the completion of above-mentioned work, microcontroller (101) changes program-controlled
Tristate bus line isolation controller (102) working condition, and microcontroller (101) is all with NAND flash storage (301)
The control of connection and PORT COM are set to input state, and such USB bulk memory controller (302) can be to NAND Flash
Memory (301) is operated, and is read ambulatory blood pressure and is recorded data；The operation meets FAT16 agreement；Microcontroller (101) meeting
The above operation is recorded；
Second situation: after microcontroller (101) electrifying startup, it is found that the blood pressure data of acquisition is transmitted, logger prepares
Into collecting work mode, then microcontroller (101) cutting USB bulk memory controller (302) power supply, and by program-controlled tri-state
Bus isolation controller (102) is placed in high-impedance state, protects the USB bulk memory controller (302) of off working state；Together
When, microcontroller (101) reads the operation note of the information area, if the not record about the modification various information of memory,
Logger enters normal collecting work mode；The record for modifying memorizer information if it exists, then microcontroller (101) can be recognized
For in NAND flash storage (301) bad block and logic error；Ambulatory blood pressure logger can automatically into arrive self shape
State, microcontroller (101) start formatted program, carry out format to NAND flash storage (301) according to the format of FAT16
Change, and after the completion of formatting, by the ambulatory blood pressure logger configuration information tune of backup from the information area of microcontroller (101)
Out, the file storage location required according to the desired file format of FAT16 and ambulatory blood pressure logger, will be needed for logger
File is written to one by one in NAND flash storage (301)；Then, ambulatory blood pressure logger enters collecting work mode；
There are bad block and the ambulatory blood pressure logger of logic error to return factory's dimension NAND flash storage (301) without End-Customer
It repairs.
2. security method according to claim 1, which is characterized in that the microcontroller (101) passes through the bus side IO
Formula is realized the direct operation to NAND flash storage (301), can be completed in this way to flash storage most
The operation of small storage unit ensure that storing data when occurring storing bad block, and the data for obtaining maximum possible are saved from damage；Microcontroller
Device (101) carries out, it is ensured that dynamic blood when operating NAND flash storage (301) storage in strict accordance with FAT16 call format
The data of pressure logger record are accurately written in fixed file and address, and backup has the area MBR in microcontroller (101)
Information, FAT area, the area DIR information, have the function of to NAND flash storage (301) according to FAT16 formatted.
3. security method according to claim 1, which is characterized in that deposit NAND flash storage (301)
Storage format is the file storage protocol requirement for meeting FAT16, when device detects that bad block occur in NAND flash storage (301)
Or when logical format mistake, microcontroller (101) can carry out FAT16 formatting processing to NAND flash storage (301), and
Logger configuration file is re-write, logger is made to automatically restore to factory mode.
4. security method according to claim 1, which is characterized in that the USB interface (303) is big with USB by PC machine
Mass storage controller (302) connection, realizes the access to NAND flash storage (301)；USB bulk memory controller
(302) compatible USB Mass Storage agreement realizes that equipment exempts from driving function with what PC machine communicated.
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| CN202589502U (en) * | 2012-04-19 | 2012-12-12 | 四川理工学院 | Portable wireless remote electrocardiogram monitor |
| CN203914911U (en) * | 2013-10-11 | 2014-11-05 | 杰升生物科技(上海)有限公司 | Overlength time-histories cardiac electric recording apparatus based on nand flash memory and SPI interface |
| CN104188639A (en) * | 2014-09-10 | 2014-12-10 | 朱宇东 | Ambulatory blood pressure continuous monitoring and real-time analysis system |
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