CN203619997U - Circuit capable of automatically detecting residual amount of liquid of transfusion device and alarming - Google Patents

Abstract

The utility model discloses a circuit capable of automatically detecting the residual amount of liquid of a transfusion device and alarming. The circuit comprises light emitting circuit bodies, light receiving circuit bodies, an amplifying circuit body, a microcontroller, an alarming circuit body and a power source. A light emitter I and a light sensor I are combined to form a light pair tube I, a light emitter II and a light sensor II are combined to form a light pair tube II, and the transfusion device sequentially passes from the middle of the light pair tube I and the middle of the light pair tube II. The two light emitting circuit bodies and the two light receiving circuit bodies are both electrically connected with the microcontroller and the two light receiving circuit bodies are electrically connected with the amplifying circuit body. The amplifying circuit body is electrically connected with the microcontroller. The microcontroller is electrically connected with an alarming device. The microcontroller is electrically connected with the power source. The circuit can automatically detect the residual amount of the medicine liquid, has no requirements for the type of transfusion medicine liquid, is low in power consumption, flexible in placed position and high in compatibility with the shape of the transfusion device, and the circuit can be used by medical staff conveniently.

Description

A kind of automatic detection infusion set residual liquid quantity the circuit of reporting to the police

Technical field

This utility model relates to a kind of circuit of automatic tracer liquid surplus, the circuit that especially automatically detects infusion set residual liquid quantity and report to the police according to residual volume when medical transfusion.

Background technology

Fluid delivery apparatus is the requisite medical treatment device of hospital, contemporary common transfusion equipment is in the time infusing, in order to change in time liquid medicine, prevent from infusion needle not being extracted in time and being caused backflow of blood to return tube for transfusion after infusion-completed, usually need to have people guard and observe remaining liquid measure aside, increased monitoring personnel's workload.

Comprise concentration to liquid, detection and in commercial production the control to liquid capacity of impurity about the detection of liquid the present age, and in liquid remaining-amount detecting technical field, mostly adopt pressure sensing technology, the Control peripheral circuit by pressure transducer tracer liquid surplus, this class device is often used in commercial production, is not suitable for the detection of residual liquid quantity in armarium tube for transfusion.

In the time of medical transfusion in the detection of residual liquid quantity, mostly adopt single channel infrared light to Manifold technology, infrared transmitter becomes infrared tube with corresponding infrared light receiver corporation, it drips speed to liquid capacity or drop and detects and control, detection method is generally liquid to be measured at the liquid level of tube for transfusion or the speed of drop in the refraction of liquid or the principle of scattering according to infrared light, and microprocessor carries out subsequent treatment.

Derive from broadcasting and TV electrical equipment user name in " DW-301 Medical wireless transfusion monitoring system design " based on MSP430 article as one piece, this article is to utilize a road Infrared to change light transmition direction by the refraction of tube for transfusion liquid, and then measurement has no liquid, the problem of its existence is as described below: this design circuit complexity, power consumption is large, and always to change battery or charging, judge there is no liquid owing to utilizing infrared light to change direction of light by liquid refracting, make the shape of tube for transfusion have corresponding requirement, its cross section must be trapezoidal, and trapezoidal interior angle angle is had to requirement, and our daily tube for transfusion is mostly cylindricality, this is restricted the use of said apparatus on common transfusion pipe, must on tube for transfusion, increase again corresponding trapezoidal pipeline if this device is installed, not only increase cost, also inconvenient, light transmission rate is relevant with the kind of liquid in addition, and when more defeated medicinal liquids, this device just can not use.

For another example one piece derives from " electronic design technology " " liquid dropping speed detector " article by name, Shi You mono-road infrared tube, pressure transducer, amplifying circuit, V/F change-over circuit, motor installation composition.There are the following problems: the infrared tube in this device is positioned over the separator tube position of tube for transfusion, whether the principle that refraction changes light intensity to occur in the time that drop drips according to light detect drop and drip speed, different reflection liquid rate and transmitance are different, when more defeated special liquid, still can not use; Wherein pressure transducer is the detection to residual liquid quantity, and placement location can only be in the bottom of infusion bottle, thereby uses inconveniently, and this device has used too much component, causes power consumption excessive.

Present stage, automatically detect in the technology of the residual solution scale of construction in infusion set, the problem of existence is: can not on common cylinder type tube for transfusion, use, need to increase subsidiary conduit and cause using inconvenience; Can not use some special medicinal liquids; Placement location is dumb; Circuit power consumption is larger, and electrical source consumption is too fast.

Need to address the above problem, provide one on common transfusion pipe, to use, do not need to increase subsidiary conduit or change pipeline, can detect various medicinal liquids, place flexibly position, the residual liquid quantity of low-power consumption detects and warning circuit automatically.

Summary of the invention

In order to address the above problem, the circuit that the utility model discloses a kind of automatic detection infusion set residual liquid quantity and report to the police, this circuit can be realized transfusion liquid surplus in automatic detection medical transfusion equipment and control the function of alarm device according to its surplus.

This utility model is that the technical scheme that addresses the above problem employing is:

Circuit comprises two-way optical transmission circuit, two-way optical receiving circuit, amplifying circuit, microcontroller, warning circuit, power supply; Optical transmission circuit comprises respectively optical transmitting set one, optical transmitting set two, and optical receiving circuit comprises respectively light-sensitive element one, light-sensitive element two; Optical transmitting set one is combined into light to managing one with light-sensitive element one, and optical transmitting set two is combined into light to managing two with light-sensitive element two, and infusion set passes through in the middle of managing one from light, after a segment distance, passes through from light in the middle of managing two again; Two-way optical transmission circuit is all electrically connected with microcontroller, and two-way optical receiving circuit is all electrically connected with amplifying circuit, and amplifying circuit is electrically connected with microcontroller, and microcontroller is electrically connected with alarm device, and microcontroller is electrically connected with power supply.

Be optical transmission circuit, optical receiving circuit, amplifier power supply by the output pin of microcontroller, microcontroller periodically sends detection signal, provides electric energy in the moment of detecting, and all the other times close in time, have reduced energy expenditure.

The beneficial effects of the utility model: can be compatible mutually with common transfusion tube shape, without changing tube for transfusion shape or increasing other auxiliary facilities, and simple in structure, volume is little, has reduced cost; Can use various medicinal liquids; Can be placed on tube for transfusion, also can be placed on infusion bottle, placement location is flexible; Circuit power consumption is less.

accompanying drawing explanation:

Fig. 1 is theory diagram of the present utility model

Fig. 2 is the schematic diagram of a circuit embodiments

1 first via optical transmission circuit in figure, 2 second road optical transmission circuits, 3 first via optical receiving circuits, 4 second road optical receiving circuits, 5 infusion sets, 6 amplifying circuits, 7 microcontrollers, 8 alarm devices, 9 batteries.

the specific embodiment:

In conjunction with the drawings this utility model is further described.

Theory diagram as shown in Figure 1, comprising: first via optical transmission circuit, the second road optical transmission circuit, first via optical receiving circuit, the second road optical receiving circuit, amplifying circuit, microcontroller, alarm device.

This circuit adopts two-way light, the voltage of two-way optical receiving circuit output represents with V1 and V2, in the time that medicinal liquid is more, liquid level is above two-way light, liquid is in full accord to the effect of two-way light, V1 and V2 are almost identical, in the time that medicinal liquid is less, liquid level, in the middle of two-way light, only has a road light liquid body impact, the not liquid body impact of another road light, be subject to air impact, V1 and V2 differ larger, by exporting to single-chip microcomputer after amplifying circuit differential amplification, single-chip microcomputer detects change in voltage, can determine that liquid level is between two-way light.To reflection of light rate, refractive index, absorbance how no matter whether medicinal liquid is transparent,, when liquid level is during in centre position, all can be detected, thereby this circuit is applicable to various medicinal liquids.

Two-way optical transmitting set and corresponding two-way optical receiver form two pairs of simple light to pipe, the design benefit of this partial circuit is that the shape of tube for transfusion is not had to specific (special) requirements, as long as use common transparent tube for transfusion or infusion bottle just passable, needn't change tube for transfusion or add pipeline just to make this device and existing infusion set agree with mutually, can directly obtain liquid remaining-amount detecting result, checkout gear is very simple and convenient.

Fig. 2 is the schematic diagram of a circuit embodiments, and the model that wherein amplifier adopts is OPA890, when this amplifier work, operating current is little, only needs a positive voltage, can provide by pin of single-chip microcomputer, operating temperature is-40 to 85 degrees Celsius, the temperature while meeting transfusion conventionally.

No. 4 pin ground connection of amplifier, two input pins 2,3 receive respectively two signals of telecommunication that produce from two optical receivers, output pin 1 Output rusults V3.

Because amplifier output signal is analogue signal, need convert digital signal to for the control to subsequent conditioning circuit, therefore need to select the microcontroller with A/D function, here adopting single-chip microcomputer model is STC12C5620AD chip, its pin is 28, requirement to single-chip microcomputer number of pins while meeting actual connection, running voltage can be in 2.2V-3.6V low pressure range, power consumption is little, its original state is: No. 14 pin is low level, No. 28 pin connects high level, detailed process is: be electrically connected with No. 7 pins of amplifier by single-chip microcomputer P2.6 pin, in order to the positive supply of amplifier to be provided, P2.2, P2.3, P3.0 and the P3.1 pin of single-chip microcomputer is electrically connected with two optical transmitting sets, two optical receivers respectively, is used to two optical transmitting sets and two optical receivers that power supply is provided, single-chip microcomputer P3.2 pin is electrically connected with No. 1 pin of amplifier, for the V3 signal of reception amplifier output.

The intervalometer of single-chip microcomputer periodically wakes single-chip microcomputer up, makes single-chip microcomputer successively to amplifying circuit, optical receiving circuit, optical transmission circuit power supply, two-way optical transmission circuit sends light, after infusion set, received and convert to two path signal by two-way optical receiving circuit, two path signal obtains a signal of telecommunication again and gives single-chip microcomputer after amplifying circuit, single-chip microcomputer carries A/D and converts analog electrical signal to digital signal, the initialize signal that single-chip microcomputer records when this signal and systems is powered on is made comparisons, judge that infusion set liquid level changes, if changing to satisfy condition, liquid level just notify alarm device to report to the police, otherwise single-chip microcomputer enters resting state again, and stop powering to peripheral circuit, waiting timer wakes single-chip microcomputer again up.

This utility model can be made some distortion and improvement by those skilled in the art under the prerequisite that does not depart from this utility model creation design, and these all belong to the scope of this utility model protection.

Claims (1)

1. a circuit that automatically detects infusion set residual liquid quantity and report to the police, is characterized in that:

Circuit comprises two-way optical transmission circuit, two-way optical receiving circuit, amplifying circuit, microcontroller, warning circuit, power supply; Optical transmission circuit comprises respectively optical transmitting set one, optical transmitting set two, and optical receiving circuit comprises respectively light-sensitive element one, light-sensitive element two; Optical transmitting set one is combined into light to managing one with light-sensitive element one, and optical transmitting set two is combined into light to managing two with light-sensitive element two, and infusion set passes through in the middle of managing one from light, after a segment distance, passes through from light in the middle of managing two again; Two-way optical transmission circuit is all electrically connected with microcontroller, and two-way optical receiving circuit is all electrically connected with amplifying circuit, and amplifying circuit is electrically connected with microcontroller, and microcontroller is electrically connected with alarm device, and microcontroller is electrically connected with power supply.

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