CN202069949U - Infrared transfusion dripping-speed monitor - Google Patents
Infrared transfusion dripping-speed monitor Download PDFInfo
- Publication number
- CN202069949U CN202069949U CN2011201523323U CN201120152332U CN202069949U CN 202069949 U CN202069949 U CN 202069949U CN 2011201523323 U CN2011201523323 U CN 2011201523323U CN 201120152332 U CN201120152332 U CN 201120152332U CN 202069949 U CN202069949 U CN 202069949U
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- infrared
- voltage comparator
- circuit
- speed monitor
- processor
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Abstract
The utility model discloses an infrared transfusion dripping-speed monitor, comprising a droplet detecting circuit, a voltage comparator, a processor, and a filtering and jitter-eliminating circuit arranged between an output terminal of the voltage comparator and the processor. In the utility model, the output terminal of the voltage comparator is connected with the filtering and jitter-eliminating circuit so that the jitter pulse generated by the motion of droplets can be filtered and the counting precision of the droplets on the pipe by giving out light can be improved.
Description
Technical field
This utility model relates to medical device, relates in particular to a kind of infrared transfusion drip speed monitor controller.
Background technology
In the medical monitoring field, traditional ward mornitoring means more and more can not adapt to the medical monitoring demand of current diversification, informationization, personalization.With common venous transfusion process is example, and it is one of important measures of clinical rescue and treatment patient.The correctness of transfusion drip speed is to patient's treatment and safe playing an important role.And be manually to carry out under uncomfortable and tired situation by patient or its family members to the monitoring of infusion process, increased the weight of the burden on their body ﹠ mind, also through regular meeting's trouble unnecessary, nor be beneficial to the integrated management of lesion because of carelessness causes. always
Infusion process for public ward generally need be monitored two projects, and the one, medicine liquid droplet speed, it is individual that to feed liquor speed requirement difference, too fast mistake all can have adverse influence to patient slowly when infusing because of body constitution, state of an illness difference; The 2nd, the medicinal liquid liquid level can in time be reported to the police when promptly medicinal liquid is used up soon and notified the nurse to handle.
Chinese patent 201020032782.4 discloses a kind of portable medical transfusion device and has dripped speed detector, discoidal infrared detecting device is connected on the dropping funnel of disposable transfusion device, infrared detecting device is connected with comparison circuit by lead, the output lead of comparison circuit inserts the digital quantity input of usb data capture card, the usb data capture card is connected with USB interface of computer by the USB line, and the power supply of infrared detecting device, comparison circuit, usb data capture card is all provided by the 5V dc source of USB interface of computer.The device of this patent disclosure has been realized plug and play, and is easy to carry, but because drop is kept in motion, testing circuit can produce certain shake pulse during by optical sensor, causes droplet counting inaccurate.
Summary of the invention
This utility model provides a kind of infrared transfusion drip speed monitor controller, has solved testing circuit and can produce the shake pulse, causes the inaccurate problem of droplet counting.
A kind of infrared transfusion drip speed monitor controller comprises drop detection circuit, voltage comparator, processor, is provided with the filtering de-twitter circuit between the outfan of voltage comparator and the processor.
The signal output part of described drop detection circuit is by first in-phase input end that is capacitively coupled to voltage comparator.
Described filtering de-twitter circuit comprises 555 chips and peripheral two electric capacity, and 2 feet of 555 chips connect the outfan of voltage comparator, and 3 feet are by second capacity earth; 5 feet are as signal output part, and 6,7 feet are by the 3rd capacity earth.General drop be 20ms through infrared light probably to time of pipe, so just can filtering interfering about the signal lag 20ms that 555 chips export as long as allow.
Described drop detection circuit comprises infrared light-emitting diode and infrared photodiode, and the distance between described infrared light-emitting diode and the infrared photodiode is 30～50mm.
Said apparatus also comprises the warning circuit that is connected with processor.
Described processor adopting AT89C51 chip.
This utility model is by connecting the filtering de-twitter circuit at the outfan of voltage comparator, can filtering because the shake pulse that liquid drop movement produces has improved drop through luminous counting precision to pipe.
Description of drawings
Fig. 1 is the modular structure sketch map of this utility model monitor controller;
Fig. 2 is the circuit catenation principle figure of this utility model drop detection circuit, voltage comparator and filtering de-twitter circuit.
The specific embodiment
As shown in Figure 1, a kind of infrared transfusion drip speed monitor controller comprises dropping liquid testing circuit 2, voltage comparator 3, filtering de-twitter circuit 4, power module 5, processor 1, warning circuit 6, drive circuit 7 and display circuit 8.
Processor adopting AT89C51 chip, whether dropping liquid testing circuit 2 is mainly used in the detection medicinal liquid and drips in the Mohs pipe, it comprises that spacing is infrared light-emitting diode S and the infrared photodiode T of 40mm, because when infrared ray passes through drop, the light intensity that is incident upon infrared photodiode T can weaken, and the voltage of infrared photodiode T output can descend.It also comprises resistance R 1, R2, R3, R4 and audion Q0, resistance R 1, R2 series connection, and the base stage of serial connection point connection audion Q0, the colelctor electrode of audion Q0 connects infrared photodiode T by resistance R 3, and emitter stage is by resistance R 4 ground connection.Change the R1 size and can adjust the operating current of infrared light-emitting diode S, change the R2 size and can regulate infrared photodiode T static work point voltage.
The outfan of infrared photodiode T connects light emitting diode D0 and is coupled to the in-phase end of voltage comparator 3 by capacitor C 0, and the junction point of capacitor C 0 and light emitting diode D0 is by resistance R 5 ground connection, and the backward end of voltage comparator 3 connects adjustable resistance Rg.Resistance R 1, infrared light-emitting diode S, infrared photodiode T and adjustable resistance Rg connect power supply.
The outfan of voltage comparator 3 connects filtering de-twitter circuit 4, filtering de-twitter circuit 4 comprises NE555 chip, capacitor C 1, C2, the pin that the NE555 chip connects voltage comparator 3 outfans connects power supply by resistance R 6,6 feet are connected power supply with 7 feet by resistance R 7,5 feet are by capacitor C 1 ground connection, and 6 feet are by capacitor C 2 ground connection.
Warning circuit is formed (not shown) by two display lamps, buzzer and current-limiting resistances, gives the alarm when dripping one of them display lamp of speed violation, and another display lamp gives the alarm when medicinal liquid is used up.
The said apparatus operation principle is as follows:
Infrared light-emitting diode S is arranged on the relative both sides of Mohs pipe with infrared photodiode T, when drop drips, the light intensity that infrared photodiode T receives can weaken, its output voltage is coupled to the in-phase end of voltage comparator 3 by capacitor C 0, voltage comparator 3 is back output corresponding signal relatively, filtering de-twitter circuit 4 can filtering because the shake pulse that liquid drop movement produces, processor 1 receives the signal of comparator 3 outputs, in the set time, the amount of droplets of drippage is counted, thereby obtain the speed of dripping of drop, and on display, show.When dropleting speed surpassed default threshold value or medicinal liquid and uses up, then buzzer and display lamp gave the alarm.This warning circuit can use the existing warning system of hospital, and processor only is to send the relative trigger signal to get final product.
Claims (4)
1. one kind infrared transfusion drip speed monitor controller comprises drop detection circuit, voltage comparator, processor, it is characterized in that, is provided with the filtering de-twitter circuit between the outfan of described voltage comparator and the processor.
2. infrared transfusion drip speed monitor controller according to claim 1 is characterized in that, the signal output part of described drop detection circuit is by first in-phase end that is capacitively coupled to voltage comparator.
3. infrared transfusion drip speed monitor controller according to claim 1, it is characterized in that, described drop detection circuit comprises infrared light-emitting diode and infrared photodiode, and the distance between described infrared light-emitting diode and the infrared photodiode is 30～50mm.
4. infrared transfusion drip speed monitor controller according to claim 1 is characterized in that, comprises the warning circuit that is connected with processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201523323U CN202069949U (en) | 2011-05-13 | 2011-05-13 | Infrared transfusion dripping-speed monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201523323U CN202069949U (en) | 2011-05-13 | 2011-05-13 | Infrared transfusion dripping-speed monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202069949U true CN202069949U (en) | 2011-12-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201523323U Expired - Fee Related CN202069949U (en) | 2011-05-13 | 2011-05-13 | Infrared transfusion dripping-speed monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202069949U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157155A (en) * | 2013-03-13 | 2013-06-19 | 南京化工职业技术学院 | Medical liquid drop counter |
| CN105413012A (en) * | 2015-12-23 | 2016-03-23 | 桂林电子科技大学信息科技学院 | Portable intelligent infusion system |
| CN107715241A (en) * | 2017-11-16 | 2018-02-23 | 湖南工业大学 | Transfusion drip speed monitoring device |
| CN107773810A (en) * | 2017-11-16 | 2018-03-09 | 湖南工业大学 | Transfusion drip speed automaton |
-
2011
- 2011-05-13 CN CN2011201523323U patent/CN202069949U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157155A (en) * | 2013-03-13 | 2013-06-19 | 南京化工职业技术学院 | Medical liquid drop counter |
| CN105413012A (en) * | 2015-12-23 | 2016-03-23 | 桂林电子科技大学信息科技学院 | Portable intelligent infusion system |
| CN107715241A (en) * | 2017-11-16 | 2018-02-23 | 湖南工业大学 | Transfusion drip speed monitoring device |
| CN107773810A (en) * | 2017-11-16 | 2018-03-09 | 湖南工业大学 | Transfusion drip speed automaton |
| CN107715241B (en) * | 2017-11-16 | 2020-09-29 | 湖南工业大学 | Infusion dripping speed monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20150513 |
|
| EXPY | Termination of patent right or utility model |