CN108376560A - A kind of transfusion liquid level monitoring system and its working method based on RFID passive sensories - Google Patents
A kind of transfusion liquid level monitoring system and its working method based on RFID passive sensories Download PDFInfo
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- 239000007788 liquid Substances 0.000 title claims abstract description 127
- 238000012544 monitoring process Methods 0.000 title claims abstract description 43
- 230000001953 sensory effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 15
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- 238000002372 labelling Methods 0.000 claims abstract description 39
- 238000004891 communication Methods 0.000 claims abstract description 10
- 239000003978 infusion fluid Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 230000010287 polarization Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 206010020565 Hyperaemia Diseases 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000026676 system process Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H20/00—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
- G16H20/10—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to drugs or medications, e.g. for ensuring correct administration to patients
- G16H20/17—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to drugs or medications, e.g. for ensuring correct administration to patients delivered via infusion or injection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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- G—PHYSICS
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- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
- G16H40/20—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the management or administration of healthcare resources or facilities, e.g. managing hospital staff or surgery rooms
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Abstract
The invention discloses a kind of transfusion liquid level monitoring system and its working method based on RFID passive sensories, system includes posting liquid level perception labeling, liquid level perception all-in-one machine and server platform, the liquid level client perception end of RFID tag.Liquid level, which perceives labeling and forms tag array by being deployed in several passive RFID tags on infusion vessel outer wall, to be formed, liquid level perceives all-in-one machine and sends continuous wave signal and liquid level perception labeling progress Continued communication by reader antenna, obtain the label ID information and signal characteristic that liquid level perception labeling returns, corresponding infusion vessel is identified by embeded processor, and reader power is adjusted using two benches power Marching algorithm, label signal feature based on acquisition judges whether the top liquid level position reaches designated position, and continue to upload onto the server the fluid level condition monitored platform.Liquid level client perception end persistently obtains the fluid level condition of multiple infusion vessels by accessing server, and early warning is carried out once infusion vessel liquid level reaches designated position.
Description
Technical field
The present invention relates to RFID passive sensory technologies, specifically a kind of infusion liquid level monitoring system based on RFID passive sensories
System and its working method.
Background technology
A kind of essential therapeutic arsenals of the venous transfusion as Present clinical are needed in time in infusion process to shape of being infused
State (such as water level, flow velocity) is monitored, to prevent blood backflow, venous engorgement caused by the reasons such as water level, change in flow
Equal contingencies.It is mainly periodically patrolled by medical staff or patient's active feedback realizes the monitoring to infusion however, current,
Rarely have and realizes accurate infusion perception in real time by intelligent, automation technological means.Current venous transfusion solution party
Case includes mainly following several：1) Weighing is based on to monitor：The mode weighed based on electronic hanging scale is to infusion bottle and infusion bag
Water level be monitored, and perception data is transmitted to by server by bluetooth and is handled.This mode measurement accuracy is low, accidentally
It is poor big, it can not detect the accidents such as venous engorgement, and need persistently to replace the battery of electronic scale, troublesome maintenance.2) base
It is monitored in infrared induction：The water level of infusion bottle and infusion bag is monitored based on infrared induction, and after the completion of infusion originally
Ground carries out alarm.This mode can not give warning in advance, and can not detect the accidents such as venous engorgement, and need to hold
The continuous battery for replacing infrared inductor, troublesome maintenance.
Therefore, it is based on above-mentioned consideration, it is necessary to propose the transfusion liquid level monitoring system and its working method of a set of innovation, come
The precision for fully promoting liquid level perception, reduces the lower deployment cost and maintenance costs of system.
Invention content
The present invention proposes a kind of transfusion liquid level monitoring system and its working method based on RFID passive sensories, is connect using non-
Touch cognition technology is not necessarily to contact liq, and the reflected signal characteristic by extracting Intellisense labeling realizes accurate perception.Specifically
For, the system and method are passive in infusion bottle/infusion bag to being pasted onto by perceiving antenna based on liquid level perception all-in-one machine
Liquid level perception labeling obtains perceptual signal in real time.Liquid level perceives all-in-one machine and is based on level monitoring algorithm progress processing locality, and will
Sensing results are sent to server end.Nursing staff is that may have access to server to obtain all of its compass of competency by client
The perception situation of infusion.
Transfusion liquid level monitoring system based on RFID passive sensories, it is characterised in that including：
1) liquid level perceives labeling：Passive sensor based on RFID forms label by least two passive RFID tags
Array is pasted on infusion vessel outer wall, and two RFID tags are disposed in a horizontal manner, exists between two labels certain
Interval, wherein nethermost label be target labels, uppermost label be reference label.
2) liquid level perceives all-in-one machine：Built-in RFID reader and antenna and embeded processor and network exchange module,
Periodic scan liquid level perceives two RFID tags on labeling, and label ID information and signal characteristic are obtained from RFID tag, and
Calculate fluid level condition in infusion vessel, platform of periodically uploading onto the server.
3) server platform：Has the computer system of calculating, storage and communication capacity, periodically from liquid level perception one
Body machine obtains the sensing results of each liquid level perception labeling, and stores into database；
4) liquid level client perception end：The computer system for having calculating and communication capacity passes through the Internet access service device
Platform shows the current level state for specifying infusion vessel to user, and early warning is carried out once tank fill level reaches designated position,
And all-in-one machine can be perceived by sending the commands to restart or closing liquid level, the state of liquid level in infusion vessel described here,
Judge whether the top liquid level position reaches designated position.
In transfusion liquid level monitoring system based on RFID passive sensories, the liquid level perceives all-in-one machine, it is characterised in that
Including：
1) RFID reader：The computer system that RFID signal can be sent and received, is obtained by reader antenna
RFID tag signal, and label information and signal characteristic are extracted, including the ID of RFID tag, reading theory, signal strength information,
RFID reader and its RFID tag are hyperfrequency specification, frequency 860-960MHz, and RFID reader passes through EPC Global
C1G2 agreements read and write RFID tag.
2) reader antenna：A kind of linear polarization or circular polarized antenna emit continuous wave signal in space, and in real time
The label information that RFID tag returns is received, RFID reader is transferred to；
3) embeded processor：The embedded system for having calculating, storage and communication capacity, by the network switching equipment from
RFID reader obtains RFID tag signal, runs level monitoring algorithm, calculates fluid level condition in infusion vessel, and will be corresponding
Numerical value is periodically uploaded onto the server platform by network exchange module；
4) network exchange module：For handling the letter between RFID reader, embeded processor and server platform
Breath transmission.
In addition, a kind of infusion liquid level monitoring method based on RFID passive sensories, which is characterized in that including following step
Suddenly：
1) liquid level perception labeling is pasted onto infusion vessel outer wall by user, and infusion vessel and liquid level perception all-in-one machine are read
It is close to read device antenna so that liquid level perceives all-in-one machine scanning and perceives labeling to new liquid level, to corresponding infusion vessel in system
In registered；
2) infusion vessel for posting liquid level perception labeling is placed in the effective scanning that liquid level perceives all-in-one machine reader antenna
In range, liquid level perception all-in-one machine persistently scans two RFID on liquid level perception labeling by RFID reader and antenna to be marked
Label, obtain the id information and signal characteristic information of RFID tag, including effective read rate and signal strength values；
3) liquid level perception all-in-one machine calculates liquid in infusion vessel by running level monitoring algorithm by embeded processor
Position state, and corresponding numerical value is periodically uploaded onto the server platform by network exchange module；
4) server platform periodically obtains the sensing results that each liquid level perceives labeling from liquid level perception all-in-one machine, and
It stores in database；
5) liquid level client perception end shows to user by the Internet access service device platform and specifies the current of infusion vessel
Liquid level carries out early warning once tank fill level reaches designated position, related personnel is prompted to handle.
Among these, the level monitoring algorithm in the step 3) includes the following steps：
1) t is waited for after infusion vessel is registered in systems1Second, reader carries out power step by step modulating, from least work
Rate linear change detects reference label read rate, confirmation can identify reference label to maximum power to each correspondence power
Critical power pr, setting power pr- e is current power, and e default values are 2dBm.
2) reference label is persistently scanned, after reading n times (n default values are 5), reader carries out power step by step modulating, from
Minimum power linear change detects reference label read rate, confirmation can identify ginseng to maximum power to each correspondence power
Examine the critical power p of labelt。
3) p is takentAnd prMean value as current power, when continuous m times is read target labels, reported into countdown
Alert, m default values are 5.
A kind of transfusion liquid level monitoring system and its working method based on RFID passive sensories provided by the invention have as
Lower feature：
1) level monitoring when high-precision real：High-precision monitoring is carried out to the water level of infusion bottle/infusion bag, monitoring error is low
In 1cm, and carry out real-time state update.
2) transfusion state intelligent reminding：Using Intelligent treatment algorithm, liquid level is monitored in real time, can be fallen in advance
Timing facilitates nurse to prepare.
3) maintenance costs are reduced：It is perceived based on cheap RFID passive labels, perception labeling cost can be minimum
Change control, in addition, inactive component fully reduces maintenance costs without battery is needed to change.
4) infusion is not polluted：The system uses contactless aware scheme, and only need to be pasted onto body is perceived, and is perceived
Infusion will not be polluted in journey.
Description of the drawings
Fig. 1 is that the infusion liquid level based on RFID passive sensories monitors system architecture diagram；
Fig. 2 is based on RFID passive sensory transfusion liquid level monitoring system process charts；
Fig. 3 is that liquid level perceives labeling reference label/target labels deployment schematic diagram；
Fig. 4 is client interactive interface schematic diagram；
Fig. 5 is level monitoring algorithm flow chart.
Specific implementation mode
Fig. 1 is the infusion liquid level monitoring system architecture diagram based on RFID passive sensories, mainly by liquid level perception all-in-one machine, liquid
Position perception labeling, server platform and groups of clients at.Wherein, liquid level perception labeling is the passive sensor based on RFID,
Tag array is formed by least two passive RFID tags, RFID tag can be side by side made of multiple, also can will be of the invention
Liquid level detection system is applied in a variety of level gauging scenes；Its principle is illustrated for convenience, the present embodiment uses two
A RFID tag is detected the liquid level in infusion canister, and RFID tag is pasted on infusion vessel outer wall；Liquid level perception one
Machine is the receiver of liquid level perception labeling feedback signal, built-in RFID reader and antenna and embeded processor and network
Switching Module, periodic scan liquid level perceive two RFID tags on labeling, and label ID information and letter are obtained from RFID tag
Number feature, and liquid level in infusion vessel is calculated, platform of periodically uploading onto the server；Server platform be have calculating,
The computer system of storage and communication capacity, it can be the cloud platform system on internet, can also be the clothes in LAN
Business device system, server platform periodically obtain the sensing results that each liquid level perceives labeling from liquid level perception all-in-one machine, and
It stores in database；Liquid level client perception end is the computer system for having calculating, storage and communication capacity, such as installs client
The desktop computer or laptop for holding application show that specified infusion is held by the Internet access service device platform to user
The current level state of device carries out early warning once tank fill level reaches designated position, and can be by sending the commands to restart
Or it closes liquid level and perceives all-in-one machine.
In addition, liquid level perceives all-in-one machine by RFID reader, reader antenna, embeded processor and network exchange
Module these components composition.Wherein, RFID reader is can to send and receive the computer system of RFID signal, passes through reading
Device antenna obtains RFID tag signal, and extracts label information and signal characteristic, including the ID of RFID tag, reading theory, signal
Strength information；Reader antenna be a kind of linear polarization or circular polarized antenna, emit continuous wave signal in space, and in real time
The label information that RFID tag returns is received, RFID reader is transferred to；Embeded processor is that have calculating, storage and communication
The embedded system of ability obtains RFID tag signal by the network switching equipment from RFID reader, and operation level monitoring is calculated
Method calculates fluid level condition in infusion vessel, that is, judges whether the top liquid level position reaches designated position, and by corresponding numerical value
It is periodically uploaded onto the server platform by network exchange module；Network exchange module is a kind of interchanger or router, is used
Information transmission between processing RFID reader, embeded processor and server platform.
Fig. 2 is transfusion liquid level monitoring system process chart.Based on above-mentioned monitoring system, the present invention also provides corresponding liquid
Position monitoring method, this approach includes the following steps：
1) liquid level perception labeling is pasted onto infusion vessel outer wall by user, and infusion vessel and liquid level perception all-in-one machine are read
It is close to read device antenna so that liquid level perceives all-in-one machine scanning and perceives labeling to new liquid level, to corresponding infusion vessel in system
In registered；
2) infusion vessel for posting liquid level perception labeling is placed in the effective scanning that liquid level perceives all-in-one machine reader antenna
In range, liquid level perception all-in-one machine persistently scans two RFID on liquid level perception labeling by RFID reader and antenna to be marked
Label, obtain the id information and signal characteristic information of RFID tag, including effective read rate and signal strength values；
3) liquid level perception all-in-one machine calculates liquid in infusion vessel by running level monitoring algorithm by embeded processor
Position state, and corresponding numerical value is periodically uploaded onto the server platform by network exchange module；
4) server platform periodically obtains the sensing results that each liquid level perceives labeling from liquid level perception all-in-one machine, and
It stores in database；
5) liquid level client perception end shows to user by the Internet access service device platform and specifies the current of infusion vessel
Liquid level carries out early warning once tank fill level reaches designated position, related personnel is prompted to handle.
When carrying out infusion monitoring, liquid level perception labeling is pasted onto infusion vessel outer wall by medical staff, and infusion is held
Device and liquid level perception all-in-one machine reader antenna are close, and registration is identified to new infusion bag, places it in liquid level perception one
Within the scope of the effective scanning of body machine reader antenna.Liquid level perception all-in-one machine persistently scans liquid level by RFID reader and antenna
Two RFID tags on labeling are perceived, the id information and signal characteristic information of RFID tag, including effective read rate are obtained
And signal strength values, level monitoring algorithm is run by embeded processor, fluid level condition in infusion vessel is calculated, that is, judges most
Whether top liquid level position reaches designated position, and corresponding numerical value is periodically uploaded onto the server by network exchange module
Platform.Server platform periodically obtains each liquid level from liquid level perception all-in-one machine and perceives the sensing results of labeling, and stores
Into database.Liquid level client perception end of the medical staff of nurse station based on installation on computers, passes through internet access
Server platform, client platform show the current level state for specifying infusion vessel to user, once tank fill level arrival refers to
Positioning, which is set, just carries out early warning, and related personnel is prompted to handle.
Fig. 3 is liquid level perception labeling reference label/target labels deployment schematic diagram, wherein two RFID tags are with water
Square formula is disposed, and there are certain interval between two labels, nethermost label is target labels, uppermost label
For reference label, the position corresponding to target labels is the specified liquid level of infusion liquid level monitoring.
Fig. 4 is client interactive interface schematic diagram.Wherein, (1) is system mode column, main display system title, work
State, (2) are transfusion condition display field, mainly show water level corresponding to multiple infusion vessels, bed label, medicine information, residue
Time etc., (3) are task reminders window, and the task reminders of infusion, processing order arrangement, (4) have currently been completed in main display
For alarm pop-up, the pop window information of infusion, audio alarm are completed in main display.
Fig. 5 is level monitoring algorithm flow chart.Liquid level algorithm flow includes mainly power stepping twice, first time power step
Into the activation upper limit of the power for determining target labels, second of power stepping determines the activation lower limit of the power of target labels, finally reads
Read the mean value that device power is set as the activation upper limit of the power and lower limit.Specific algorithm flow is as follows：1) t is waited for1Second, reader carries out work(
Rate step by step modulating, to each correspondence power, detects reference label read rate from minimum power linear change to maximum power,
The critical power p of reference label can be identified by confirmingr, setting power pr- e is current power, and e default values are 2dBm.2) it persistently sweeps
Reference label is retouched, after reading n times (n default values are 5), reader carries out power step by step modulating, from minimum power linear change
Is detected by reference label read rate, confirms the critical power that can identify reference label for each correspondence power to maximum power
pt.3) p is takentAnd prMean value as current power, when continuous m times is read target labels, alarm into countdown, m is silent
It is 5 to recognize value.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every utilization
Description of the invention and accompanying drawing content the method are applied directly or indirectly in other relevant technology neighborhoods, similarly wrap
It includes in the scope of patent protection of the present invention.
Claims (8)
1. a kind of transfusion liquid level monitoring system based on RFID passive sensories, it is characterised in that including：
Liquid level perceives labeling：Passive sensor based on RFID, including several passive RFID tags form tag array, setting
In infusion vessel outer wall；
Liquid level perceives the RFID tag on all-in-one machine periodic scan liquid level perception labeling, and label ID information is obtained from RFID tag
And signal characteristic, and the state of liquid level in infusion vessel is calculated, platform of periodically uploading onto the server；
Server platform：Have the computer system of calculating, storage and communication capacity, is periodically obtained from liquid level perception all-in-one machine
The sensing results of each liquid level perception labeling are taken, and are stored into database；
Liquid level client perception end：The computer system for having calculating and communication capacity, by the Internet access service device platform, to
The state of the current level of infusion vessel is specified in user's displaying, carries out early warning once tank fill level reaches designated position, and lead to
It crosses and sends the commands to restart or close liquid level perception all-in-one machine.
2. the transfusion liquid level monitoring system according to claim 1 based on RFID passive sensories, which is characterized in that the liquid
Position client perception end by obtain different RFID tags label information can in real time in monitoring transfusion container liquid level shape
State, that is, judge whether the top liquid level position reaches designated position.
3. the transfusion liquid level monitoring system according to claim 1 based on RFID passive sensories, which is characterized in that the liquid
Position perception labeling is disposed in a horizontal manner including at least two RFID tags, there is interval between two labels, wherein
Nethermost label is target labels, and uppermost label is reference label, and the position corresponding to target labels is infusion liquid level
The specified liquid level of monitoring.
4. the transfusion liquid level monitoring system according to claim 1 based on RFID passive sensories, which is characterized in that the liquid
Position perception all-in-one machine include：
RFID reader：Send and receive RFID signal, reader antenna obtain RFID tag signal and extract label information and
Signal characteristic；
Reader antenna：A kind of linear polarization or circular polarized antenna, emit continuous wave signal, and real-time reception in space
The RFID tag signal that RFID tag returns, is transferred to RFID reader；
Embeded processor：The embedded device for having calculating, storage and communication capacity is read by the network switching equipment from RFID
It reads device and obtains RFID tag signal, run level monitoring algorithm, calculate the state of liquid level in infusion vessel, and by corresponding numerical value
It is periodically uploaded onto the server platform by network exchange module；
Network exchange module：For handling the transmission of the information between RFID reader, embeded processor and server platform.
5. the transfusion liquid level monitoring system according to claim 4 based on RFID passive sensories, which is characterized in that the mark
Label information and signal characteristic include ID, reading theory, signal strength information and the phase information of RFID tag.
6. the transfusion liquid level monitoring system according to claim 4 based on RFID passive sensories, which is characterized in that described
RFID reader and its RFID tag are hyperfrequency specification, frequency 860-960MHz, and RFID reader passes through EPC Global
C1 G2 agreements read and write RFID tag.
7. a kind of infusion liquid level monitoring method based on RFID passive sensories, which is characterized in that include the following steps：
1) liquid level perception labeling is pasted onto infusion vessel outer wall by user, and infusion vessel and liquid level are perceived all-in-one machine reader
Antenna is close so that liquid level perceives all-in-one machine scanning and perceives labeling to liquid level, is stepped in systems to corresponding infusion vessel
Note；
2) infusion vessel for posting liquid level perception labeling is placed in the effective scanning range that liquid level perceives all-in-one machine reader antenna
Interior, liquid level perception all-in-one machine persistently scans several RFID tags on liquid level perception labeling by RFID reader and antenna,
Obtain FRID label information and signal characteristic information, including the ID of RFID tag, effective reading rate, signal strength values and phase
Position；
3) liquid level perception all-in-one machine runs level monitoring algorithm by embeded processor, calculates liquid level shape in infusion vessel
State, and corresponding numerical value is periodically uploaded onto the server platform by network exchange module；
4) server platform periodically obtains each liquid level from liquid level perception all-in-one machine and perceives the sensing results of labeling, and stores
Into database；
5) liquid level client perception end shows the current liquid for specifying infusion vessel to user by the Internet access service device platform
Position carries out early warning once tank fill level reaches designated position, related personnel is prompted to handle.
8. a kind of infusion liquid level monitoring method based on RFID passive sensories according to claim 7, feature exist
In the level monitoring algorithm in the step 3) includes the following steps：
A infusion vessels wait for t after being registered in systems1Second, RFID reader carries out power step by step modulating, from minimum power
Linear change detects reference label reading theory to maximum power to each correspondence power, and confirmation can identify reference label
Critical power pr, setting power rate pr- e is current power；
B persistently scans reference label, after reading n times, reader carry out power step by step modulating, from minimum power linear change to
Maximum power detects reference label read rate, confirms the critical power that can identify reference label to each correspondence power
pt；
C takes ptAnd prMean value as current power, when continuous m times is read target labels, alarm into countdown.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109568724A (en) * | 2018-11-14 | 2019-04-05 | 南京大学 | A kind of transfusion drip speed monitoring system and its working method based on RFID passive sensory |
| CN109978097A (en) * | 2019-03-29 | 2019-07-05 | 中国联合网络通信集团有限公司 | Infusion apparatus monitoring method and system, reader, perception label and access server |
| CN110136797A (en) * | 2019-05-09 | 2019-08-16 | 邱德松 | A kind of infusion management system |
| CN113289141A (en) * | 2021-05-24 | 2021-08-24 | 南京大学 | Infusion dripping speed monitoring system based on RFID double-label sensing |
| US20230003669A1 (en) * | 2020-09-03 | 2023-01-05 | Drexel University | Moisture sensing using radio frequency identification (rfid) |
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