CN208770569U - A kind of low-power consumption monitoring infusion circuit - Google Patents
A kind of low-power consumption monitoring infusion circuit Download PDFInfo
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- CN208770569U CN208770569U CN201720964836.2U CN201720964836U CN208770569U CN 208770569 U CN208770569 U CN 208770569U CN 201720964836 U CN201720964836 U CN 201720964836U CN 208770569 U CN208770569 U CN 208770569U
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Abstract
The utility model discloses a kind of low-power consumption monitoring infusion circuits, overcome in the prior art, monitoring intelligent needs the problem of improving in infusion process.The utility model contains alarm, controller, signal picker and reset switch, alarm, controller will be after the collected liquid signal processing of signal picker, alarm is transferred to alarm, the output end of the signal picker is respectively connected to the monitoring signal input terminal of controller, alarm connects the monitoring signal output end of controller, between the reset signal input terminal and power supply GND of reset switch series connection access controller.The technology overcomes the shortcomings that poor anti jamming capability of condenser type infusion monitor, and induction can be made with fast accurate to the flowing of liquid.The intelligent management to infusion may be implemented, the working strength of medical staff can be mitigated, also solve the problem that the nurse burden of patient patient and family members in infusion process, be the effective means for promoting hospital nursing administration level.
Description
Technical field
The utility model relates to a kind of infusion alarming circuits, more particularly to a kind of low-power consumption monitoring infusion circuit.
Background technique
Infusion alarm: being the popular appellation of infusion monitor.June 10 2004, state food drug surveilance pipe
Reason office Article 10 pair in " notice defined about product classifications such as gingivitis flushers " (state eats medicine and supervises tool [2004] 321)
The definition of infusion monitor is: " medical infusion monitor: for monitoring transfusion state, moving or reach setting when medical fluid stops drop
Prompt can be issued when value, as I class medical instrument management ".
Infusion is one of most common therapeutic modality of medical field, it is desirable to which the people for solving monitoring infusion has very much, Ta Mendou
Had to be hospitalized and be infused or the experience for infusion of staying in the ward to look after the patient night and day, and felt deeply and need prompting (alarm) device when infusion is near completion.It is defeated
The positive effect of liquid monitor has at 3 points: first is that patient has demand, second is that it is helpful to nursing staff, third is that national Bureau of Drugs Supervision branch
It holds.
1, patient has demand.There is the people for being hospitalized and being infused or stay in the ward to look after the patient night and day and being infused and undergo, majority has such cognition, that is,
Patient often sleeps in infusion process or does other thing, and the nurse of hospital, can not be timely due to nurse multiple patients
The case where looking after each infusion bottle is difficult to notice the number of medical fluid in infusion bottle constantly, and once medicine company drips off in bottle
It will cause blood back, enter the serious consequences such as air in blood.Because of infusion, sleepy feel dare not be slept, and the people that stays in the ward to look after the patient night and day wants to walk and dare not walk
It opens.According to someone to some hospital's random searchings, inpatient or the family members that stay in the ward to look after the patient night and day more than 80% have the need to monitoring infusion alarm
It asks.
2, helpful to nursing staff.In recent years, although the quality of nursing staff is higher and higher, the quality of service is increasingly
The level of height, service is higher and higher, can not manually solve a problem, that is, and accurate judgement is infused the deadline, though
Right nursing staff repeatedly makes an inspection tour, and also can only be often that medical fluid is not finished completely, replace next group of infusion liquid in advance, or remove
Infusion apparatus.The result is that not only having expended the energy of nursing staff, but also some medical fluids of waste.
3, national Bureau of Drugs Supervision supports.Based on multi-party demand, State Food and Drug Administration is June ten 2004
Day, in " notice defined about product classifications such as gingivitis flushers " (state eats medicine and supervises tool [2004] 321), infusion is supervised
Medical apparatus classification, the function etc. that control device should belong to are defined, and are development and the registration medical instrument card of infusion monitor
Road is paved.
There are mainly three types of the technology of various infusion monitor applications is summed up: first is that photovoltaic principals, second is that weighing principle；
Third is that capacitance principle.In addition also by principle of electrodes conduct etc., but there is pollution to medical fluid, can not apply.
1, for the infusion monitor using photovoltaic principals, the method for early stage is that infusion monitor is clamped in infusion apparatus
On dropping funnel, or it is clamped in the oral area of infusion bottle, these methods have the characteristics that influence observation, detection relative poor.Present technology
It has been carried out and is clamped on perfusion tube, the fining of detection is largely increased.The disadvantage is that volume is bigger, high expensive,
It is too expensive, need external power supply.
It 2, is to utilize spring scale or pressure sensor for the infusion monitor of weighing principle (or button weight, check weighing principle)
According to drug weight variation come whether judging that medical fluid is finished, and the empty infusion bottle for different weight is also needed to be adjusted initially
Parameter.Although structure is simple, in the presence of detecting, extensive, volume is bigger than normal and accuracy, reliability and adaptability is not high not
Foot.
3, the infusion monitor technical difficulty of capacitive technologies is high, and anti-interference ability is weak, and technology is only limitted to individual factories at present
Family grasps, therefore price is excessively high in the market, is not easy to popularize.
Utility model content
The utility model overcomes in the prior art, and monitoring intelligent needs the problem of improving in infusion process, provides one
Simple, easy to use, the practical low-power consumption monitoring infusion circuit of kind structure.
The technical solution of the utility model is to provide a kind of low-power consumption monitoring infusion circuit having following structure:
Containing alarm, controller, signal picker and reset switch, alarm, controller are by the collected liquid of signal picker
It after signal processing, is transferred to alarm and alarms, the output end of the signal picker is respectively connected to the monitoring letter of controller
Number input terminal, alarm connect the monitoring signal output end of controller, reset switch connect access controller reset signal it is defeated
Enter between end and power supply GND.
The controller is PIC single chip microcomputer, model PIC12F683.
The signal picker is capacitive touch sensor, and output end is respectively connected to the pin 2 and pin 8 of controller,
Wherein pin 2 accesses power supply VCC by resistance, and pin 8 accesses power supply GND.
The alarm is divided into voice guard and visual alarm, wherein the signal input part connection sound of voice guard
The pin 1 and pin 3 of sound alarm driving chip, the audible ringing signal input pin 2 on voice guard driving chip connect
The audible ringing signal output pin 3 on controller is connect, the cathode of visual alarm is separately connected the light warning letter of controller
The cathode of number output pin 4 and pin 5, visual alarm accesses power supply GND.
The voice guard is piezoelectric type passive buzzer, and voice guard driving chip is piezo buzzer driving
Chip.The visual alarm is LED light.
Compared with prior art, the utility model low-power consumption monitoring infusion circuit has the advantage that infusion monitor can
To realize to the intelligent management of infusion, the working strength of medical staff can be mitigated, also solve the problem that patient in infusion process
The nurse of patient and family members are born, and are the effective means for promoting hospital nursing administration level.
The shortcomings that overcoming the poor anti jamming capability of condenser type infusion monitor first, can be quickly smart to the flowing of liquid
Standard makes induction.Secondly, the product is designed using super low-power consumption element, it is not necessarily to external power supply, is powered using button cell, worked
Time is longer, and volume very little, easy to operate, price is extremely low.Finally the product is in line with the service whole society, the ancestor quickly popularized
Purport provides whole open source technologies, attracts most of common engineering participations of infusion alarm producer, play whole society's resources advantage with
Just cost is reduced, it is quickly universal, service the whole society.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model low-power consumption monitoring infusion circuit；
Fig. 2 is the design diagram of the utility model low-power consumption monitoring infusion circuit；
Fig. 3 is the software flow pattern of the utility model low-power consumption monitoring infusion circuit；
Fig. 4 is the mount structure schematic diagram of single-chip microcontroller in the utility model low-power consumption monitoring infusion circuit；
Fig. 5 is the structural schematic diagram of buzzer driving chip in the utility model low-power consumption monitoring infusion circuit.
Specific embodiment
The utility model low-power consumption monitoring infusion circuit is described further with reference to the accompanying drawings and detailed description:
As shown in Figure 1, containing alarm, controller, signal picker and reset switch in the present embodiment, alarm, controller will be believed
After the collected liquid signal processing of number collector, it is transferred to alarm and alarms, the output end point of the signal picker
The monitoring signal input terminal of other access controller, alarm connect the monitoring signal output end of controller, reset switch series connection
Enter between the reset signal input terminal of controller and power supply GND.
The controller is PIC single chip microcomputer, model PIC12F683.
The signal picker is capacitive touch sensor, and output end is respectively connected to the pin 2 and pin 8 of controller,
Wherein pin 2 accesses power supply VCC by resistance, and pin 8 accesses power supply GND.
The alarm is divided into voice guard and visual alarm, wherein the signal input part connection sound of voice guard
The pin 1 and pin 3 of sound alarm driving chip, the audible ringing signal input pin 2 on voice guard driving chip connect
The audible ringing signal output pin 3 on controller is connect, the cathode of visual alarm is separately connected the light warning letter of controller
The cathode of number output pin 4 and pin 5, visual alarm accesses power supply GND.
The voice guard is piezoelectric type passive buzzer, and voice guard driving chip is piezo buzzer driving
Chip.The visual alarm is LED light.
The utility model is capacitance principle infusion monitor, the basic physical principle based on capacitive touch sensor, is used
The PIC single chip microcomputer of the 22uA operating current of super low-power consumption capacitance sensor and super low-power consumption carries out capacitor sampling, uses
The driving chip of CMOSBTL output, to drive piezoelectric type passive buzzer.The selection of all chips all uses ultralow in embodiment
Power consumption component, so that entire circuit volume-diminished, can be powered using the button cell of 3.3V, continuous working period reason
By above can be up to 38 days 3 years.
Wherein there are three types of capacitive touch sensors: CVD-condenser divider；CTMU-charging time measuring unit；
CSM-capacitance sensing module.Acquisition-filtering-decoding is divided into its signal processing.
When capacitive touch sensor works, the capacitor that sensor capacitance and finger generate forms a new parallel connection electricity
Capacitive circuit, capacitor total value are equal to the sum of sensor capacitance and finger capacitor.Wherein pole plate 1 is equivalent to sensor pads, 2 phase of pole plate
When in finger, conductive materials or ionization material, the utility model middle finger transfusion liquid.When finger touches capacitive touch sensor
Cause the variation of finger capacitor, the change procedure of capacitor total value can be detected by low-power consumption PIC single chip microcomputer PIC12F683.
Microchip touch sensing method: single-chip microcontroller needs the physical quantity measured to be divided into two kinds, first is that based on time t's
The variable quantity V of voltage, second is that the frequency variation f based on cycle T.The value that single-chip microcontroller reads sensor changes with CF and is become
Change, f solution is based on equivalent RC constant, and charging situation of the V solution based on capacitor in the set time.This two
In the case of kind, the CF additionally introduced can cause the variation of sensor capacitance CT, to change measured physical quantity f and V.
It is 8 pins based on flash memory that use sodium watt technology that PIC single chip microcomputer, which chooses the reasons why PIC12F683,
SOIC8bitCMOS microprocessor has the advantage that high performance RISCCPU, it is thus only necessary to learn 35 instructions, except jump
It is outer to turn order, all instructions is all monocyclic；Operating rate is adjustable: oscillator/clock input frequency is DC-20Mhz, is referred to
Enabling the period is DC-200NS；There is the interrupt function of 8 grades of deep hardware stacks, using direct, indirect and relative addressing mode；In high precision
Internal oscillator can carry out clock with software selecting frequency range (31k ~ 8Mhz), double speed starting when working in the energy-saving mode
Pattern switching；, energy-efficient suspend mode；Width funtion working range (2.0V ~ 5.5V)；Electrification reset；Low-power consumption mode: work as voltage
Standby current representative value is 1nA when being 2.0V, and when frequency is 32Khz, operating current representative value is 8.5uA, when frequency is 1Mhz
When operating current representative value be 100uA, WatchDog Timer electric current is 1uA；The I/O pin of 6 independent, directions control, simulates ratio
Compared with device, the comparator being accessible externally to is output and input；Converter has 10bit resolution ratio and 4 paths, enhanced fixed
When device two；With capturing, comparing, PWM module, online serial programming is carried out by two pins.
CVD capacitance touch sensing method: CVD refers to capacitive divider, its working principle is that being connected to by sensor pin
The ADC module of above-mentioned PIC single chip microcomputer, acquisition sensor values are realized.
Firstly, to PIC single chip microcomputer, normally enabled and ADC is configured.
Wherein, the scanning and reading of sensor values are divided into following several stages:
VDD will be connected to reference to I/O pin " X "；Select pin " X " as ADC channel, by the holding capacitor Chold of ADC
VDD is charged to, sensor pin " Y " is grounded；Sensor pin " Y " is configured to input；Select pin Y as ADC channel,
Voltage, which is read, depends on the ratio between sensor capacitance and holding capacitor；Read ADC result.
Detailed process is as follows: when PIC single chip microcomputer is in idle condition, Chold charges to Vref, sensor ground.
Single-chip microcontroller obtains sensor reading, and as input, the channel AD switches to sensor, then starts single-chip microcontroller sensor
It is AD converted,
When single-chip microcontroller returns to idle state from working condition, Chold charges to Vref, sensor ground.
Since compression sensor increases shunt capacitance, to reduce average voltage, Chold quantifies by reference voltage
The ADC value generated later is sent into Chip Microcomputer A/D channel.
When the selection of piezo buzzer, buzzer is divided into electromagnetic buzzer and piezoelectric buzzer, and piezoelectric type buzzing
Device is divided into active buzzer and passive buzzer again.The selection of piezo buzzer driving circuit: DS019 is a CMOSBTL
The piezo buzzer driving circuit of output, using the patch packing forms of SOT23-6.4 can be selected by CH1 and CH2
Different output frequencies is planted to meet different requirements.The chip operation is stablized, and consistency is good, and peripheral circuit is simple, is suitble to SMD patch
The exploitation of piece buzzer.It is mainly characterized by operating voltage 2-6V, maximum drive current 8mA.Its pin arrangements is as follows: stand-by operation
Time demonstration: the product uses the button cell of CR1603, and theoretical capacity is 120mAh.Main power consumption component is PIC monolithic
Machine and piezo buzzer.The low-power consumption operating current of PIC single chip microcomputer is 8.5uA, and suspend mode is that 10nA can ignore not
Meter.We take 3 seconds detection methods, wherein entering dormancy time every one second single-chip microcontroller is 2 seconds, therefore the theory of single-chip microcontroller
Stand-by time can use following formula to calculating: standby time T=2*1000=28235 hour (120mAh/8.5uA) *, and conversion is all day long
Number is 1176 days, that is, 3.2 years.The power consumption of piezo buzzer is removed again, is calculated daily according to 3mAh, is roughly equivalent to list
The stand-by time of piece machine reduces 60 seconds/daily, that is, the stand-by time of 60*1176 seconds (22 days) is reduced in total.It therefore can be with
Extrapolating theoretical stand-by time is 0 38 days 3 years.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
The embodiment of the utility model description is only the utility model a part of the embodiment, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
Claims (6)
1. a kind of low-power consumption monitoring infusion circuit contains alarm, controller, signal picker and reset switch, alarm, control
Device processed is transferred to after the collected liquid signal processing of signal picker alarm and alarms, it is characterised in that: the letter
The output end of number collector is respectively connected to the monitoring signal input terminal of controller, and alarm connects the monitoring signal output of controller
End, between the reset signal input terminal and power supply GND of reset switch series connection access controller.
2. low-power consumption monitoring infusion circuit according to claim 1, it is characterised in that: the controller is PIC single chip microcomputer,
Its model PIC12F683.
3. low-power consumption monitoring infusion circuit according to claim 1, it is characterised in that: the signal picker is capacitive touch
Sensor is touched, output end is respectively connected to the pin 2 and pin 8 of controller, and wherein pin 2 accesses power supply VCC, pipe by resistance
Foot 8 accesses power supply GND.
4. low-power consumption monitoring infusion circuit according to claim 1, it is characterised in that: the alarm is divided into audible alarm
Device and visual alarm, wherein the signal input part of voice guard connects the pin 1 and pin of voice guard driving chip
3, the audible ringing signal input pin 2 on voice guard driving chip connects the audible ringing signal efferent duct on controller
Foot 6, the cathode of visual alarm are separately connected the light warning signal output pin 4 and pin 5 of controller, visual alarm
Anode access power supply GND.
5. low-power consumption monitoring infusion circuit according to claim 4, it is characterised in that: the voice guard is piezoelectric type
Passive buzzer, voice guard driving chip are piezo buzzer driving chip.
6. low-power consumption monitoring infusion circuit according to claim 4, it is characterised in that: the visual alarm is LED light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720964836.2U CN208770569U (en) | 2017-08-04 | 2017-08-04 | A kind of low-power consumption monitoring infusion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720964836.2U CN208770569U (en) | 2017-08-04 | 2017-08-04 | A kind of low-power consumption monitoring infusion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208770569U true CN208770569U (en) | 2019-04-23 |
Family
ID=66140491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720964836.2U Expired - Fee Related CN208770569U (en) | 2017-08-04 | 2017-08-04 | A kind of low-power consumption monitoring infusion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208770569U (en) |
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2017
- 2017-08-04 CN CN201720964836.2U patent/CN208770569U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190423 Termination date: 20200804 |