CN109764941A - A kind of liquid-level detecting method of the luxuriant and rich with fragrance pot of ink - Google Patents
A kind of liquid-level detecting method of the luxuriant and rich with fragrance pot of ink Download PDFInfo
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- CN109764941A CN109764941A CN201910069495.6A CN201910069495A CN109764941A CN 109764941 A CN109764941 A CN 109764941A CN 201910069495 A CN201910069495 A CN 201910069495A CN 109764941 A CN109764941 A CN 109764941A
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Abstract
The present invention provides a kind of liquid-level detecting method of luxuriant and rich with fragrance pot of ink, include the following steps: that S1 the light of detection sensor one and sensor two and is converted to voltage signal respectively；Sensor after conversion circuit in endpoint e output voltage Ve1, then in endpoint e output voltage Ve2 after the converted circuit of sensor two；The voltage signal of S1 step is transferred to data processor and compared by S2；Output voltage Vout=Ve2-Ve1 of the output end of S3 comparison circuit.The present invention is only in output electric current (output voltage) > sensor two output electric current (voltage) of sensor one, ink phenanthrene pot normal operating conditions.
Description
Technical field
The present invention designs a kind of level sensing, especially relates to a kind of liquid level detection device of luxuriant and rich with fragrance pot of ink.
Background technique
Venous transfusion is one of common disease treatment method.Currently used perfusion tube material substantially uses transparent modeling
Material, venous transfusion pipeline itself does not have monitoring, alarming function, in infusion treatment, needs the manually touring observation infusion pipeline of timing
The medical fluid liquid level of black phenanthrene pot, to handle in time, avoid infusion pipeline blood back, for medical worker, work at the end of infusion
It measures very greatly, and is also a kind of burden for patient and its family members, for patient, influence patient's rest.Have
When because patient and family members are careless or fatigue or nurse job is busy fails to make an inspection tour in time, cannot find that in time liquid infusion terminates,
Blood back or air input blood vessel in perfusion tube are caused, adverse consequences is generated.Therefore, it is necessary to additional infusion alarms, when defeated
At the end of liquid is fast, infusion alarm generates alarm signal, reminds patient and family members or medical staff.
The main Types of existing liquid level detection device have the different types such as weight measurement, capacitive sensing, optoelectronic induction.Have
Type structure it is complicated, higher cost is more using step, and operating process is loaded down with trivial details；Type be for infusion bag itself carry out
Design innovation can not be applicable in all types of infusion bags, and practicability is not high, trigger the sensor of alarm signal in induction region
Inside incuded, but sensor must be inserted directly into infusion bottle and carry out using may pollute medical fluid.
So how to design easy to operate, the higher medical infusion alarm of accuracy of one kind or medical infusion alarm
System, becoming us will currently solve the problems, such as.
Chinese patent application publication No. CN 102284105A, a kind of entitled infusion alarm, the invention are public
Having opened is a kind of using level sensing and single-chip microcontroller as the infusion alarm system of core, including power module, photoelectric sensor, is compared
Device, single-chip microcontroller, LED lamp, audible alarm unit and executing agency；Wherein, it is detected by photoelectric sensor (photoelectric interrupter)
Perfusion tube liquid, and infusion alarm system is controlled by single-chip microcontroller；Photoelectric sensor is a photoelectric interrupter, for examining
Survey perfusion tube liquid；Comparator is a voltage comparator；When perfusion tube has liquid, the phototriode of photoelectric sensor is received
To the stronger infrared light issued by infrared diode, the electric current for flowing through phototriode circuit is larger, thus voltage comparator
Negative voltage reduce, export high level, alarm do not do any movement, and infusion continues；When infusion draws to an end, that is, it is infused
When pipe does not have liquid, the phototriode of photoelectric sensor receives the weaker infrared light issued by infrared diode, flows through
The electric current of phototriode circuit is smaller, and electric current changes significantly, thus the negative voltage of voltage comparator increases, and exports low
Level.But there is situation to be being entirely liquid in black luxuriant and rich with fragrance pot, illustrate that failure occurs in infusion, detection perfusion tube liquid is simultaneously
Perfusion tube has liquid, is equally also required to notify medical staff, but infusion alarm cannot alarm.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides one kind is under different conditions at three kinds
Black phenanthrene pot does not have liquid, partly fills detection device under state and hydraulically full.
The technical scheme is that
A kind of liquid-level detecting method of the luxuriant and rich with fragrance pot of ink, includes the following steps:
S1 the light of detection sensor one and sensor two and is converted to voltage signal respectively；
Sensor in endpoint e output voltage Ve1, then exports after the converted circuit of sensor two in endpoint e after conversion circuit
Voltage Ve2；
S2: the voltage signal of S1 step is transferred to data processor and is compared；
S3: output voltage Vout=Ve2-Ve1 of the output end of comparison circuit；
When sensor one and sensor two export electric current it is same or similar when, illustrate the luxuriant and rich with fragrance pot of the ink of perfusion tube there are two kinds of situations,
One is being all air in black luxuriant and rich with fragrance pot, this illustrates that infusion has been completed；Another situation is that being entirely liquid in ink phenanthrene pot, say
There is failure in bright infusion；
When sensor one and the significantly different output electric current of sensor two, there are two kinds of situations；The first is the defeated of sensor one
Electric current is significantly less than the output electric current of sensor two out, illustrates that sensor breaks down, needs to export alarm signal, be examined
It repairs；Second situation is that the output electric current of sensor one is significantly greater than the output electric current of sensor two, illustrates exist in black luxuriant and rich with fragrance pot
Medical fluid, and that full of the luxuriant and rich with fragrance pot of ink, such situation does not belong to normal infusion state.
Further, further include following steps:
S4: when the output voltage of output voltage > sensor two of sensor one, not needing to alarm, i.e. Vout > 0, buzzer
It does not work；
When the output voltage of output voltage≤sensor two of sensor one, i.e., Vout≤0, buzzer are started to work, and are realized
The purpose of alarm.
Further, wherein sensor is made of a RF transmitter, infrared absorber and two light pipes；It is red
Outside line transmitter, infrared absorber are respectively placed in the light pipe of the two sides on black luxuriant and rich with fragrance pot same level face；
Sensor one is set to the top of black luxuriant and rich with fragrance pot, and sensor two is set to the lower part of black luxuriant and rich with fragrance pot.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, technology of the invention is former
Reason are as follows: whether the effect of sensor is in measurement propagation path of light comprising liquid；The attenuation rate that light is propagated in water is greater than light
The attenuation rate that line is propagated in air, when light is infrared ray, the comparison (or differentiation) of this attenuation effect is become apparent from.
When sensor one is same or similar with the output electric current of sensor two, illustrate that there are two kinds of feelings for the luxuriant and rich with fragrance pot of the ink of perfusion tube
Condition, one is being all air in black luxuriant and rich with fragrance pot, this illustrates that infusion has been completed, and needs to export alarm signal, notifies medical staff；Separately
It is entirely liquid that a kind of situation, which is in black luxuriant and rich with fragrance pot, illustrates that failure occurs in infusion, is equally also required to notify medical staff.
When sensor one and the significantly different output electric current of sensor two, there are two kinds of situations.The first is sensor one
Output electric current be significantly less than the output electric current of sensor two, illustrate that sensor breaks down, need to export alarm signal, carry out
Maintenance；Second situation is that the output electric current of sensor 1 is significantly greater than the output electric current of sensor 2, illustrates exist in black luxuriant and rich with fragrance pot
Medical fluid, and that full of the luxuriant and rich with fragrance pot of ink, such situation does not belong to normal infusion state.
In conclusion output electric current (output voltage) > sensor two output electric current (voltage) of only sensor one
When, it does not need to alarm, other situations are required to alarm.
Detailed description of the invention
Fig. 1 is the schematic diagram of the liquid level detection device of the luxuriant and rich with fragrance pot of ink of the invention；
Fig. 2 is the sensor schematic of the liquid level detection device of the luxuriant and rich with fragrance pot of ink of the invention；
Fig. 3 is conversion circuit schematic diagram of the invention；
Fig. 4 is comparison circuit schematic diagram of the invention；
Fig. 5 is warning circuit schematic diagram of the invention；
Fig. 6 is the alarm flow schematic diagram of the liquid level detection device of the luxuriant and rich with fragrance pot of ink of the invention；
Fig. 7 is the warning device general illustration of the liquid level detection device of the luxuriant and rich with fragrance pot of ink of the invention；
The wherein luxuriant and rich with fragrance pot of 1- ink；2- sensor；3- conversion circuit；
21- LED light emitting diode D1；22- phototriode D2；23- light pipe；
Short arrow indicates infrared ray direction in Fig. 1；The long arrow of black phenanthrene pot indicates infrared ray direction in the luxuriant and rich with fragrance pot of ink.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Referring to Fig. 1, Fig. 2, a kind of liquid level detection device of the luxuriant and rich with fragrance pot of ink, by the luxuriant and rich with fragrance pot 1 of an ink, two sensors 2 are constituted；Its
In one group of sensor (sensor one) be placed in the lower part of black luxuriant and rich with fragrance pot 1, another (sensor two) is placed in the lower part of black luxuriant and rich with fragrance pot 1.
The structure of sensor one and sensor two is illustrated in fig. 1 shown below, and each pair of sensor includes a LED light emitting diode
D1, a phototriode D2, two light pipes 23；Light pipe 23 is opaque tubular structure, can be using such as opaque modeling
The materials such as expects pipe.
The structure of phototriode and common triode is similar；Be a difference in that phototriode must have one to light
Sensitive PN junction generally uses collector junction as light knot, therefore, phototriode is substantially that one kind is equivalent to as photosurface
The common triode of photodiode is connected between base stage and collector.Phototriode and general semiconductor triode one
Sample is using the transistor made of semiconductor fabrication process with NPN or positive-negative-positive structure.It in structure with semiconductor three
Pole pipe is similar, its extraction electrode usually only two, also there are three.For the requirement for adapting to photoelectric conversion, its base area face
Product is made larger, and emitter region area is made smaller, and incident light is mainly absorbed by base area.As photodiode, the core of pipe
Piece is installed in in glass lens Can, and when light irradiation, rays pass through lens cover is on chip.When having
When the PN of light sensitive characteristic is tied by light radiation, photoelectric current is formed, resulting photogenerated current enters emitter by base stage, from
And it obtains one in collector loop and is exaggerated to be equivalent to β times of signal code.
LED light emitting diode is placed in light pipe, and the effect of this light pipe is the light for converging LED light emitting diode and issuing
Line；Phototriode D2 receives the light of D1, and generates output electric current corresponding with light intensity, the effect of light pipe be by
The light in other directions shelters from, and so that D2 is only received the light of D1 sending, to reduce the interference of ambient light.
Whether the effect of sensor is in measurement propagation path of light comprising liquid.The attenuation rate that light is propagated in water is greater than
The attenuation rate that light is propagated in air, when light is infrared ray, the comparison (or differentiation) of this attenuation effect is become apparent from.
When sensor one is same or similar with the output electric current of sensor two, illustrate that there are two kinds of feelings for the luxuriant and rich with fragrance pot of the ink of perfusion tube
Condition, one is being all air in black luxuriant and rich with fragrance pot, this illustrates that infusion has been completed, and needs to export alarm signal, notifies medical staff；Separately
It is entirely liquid that a kind of situation, which is in black luxuriant and rich with fragrance pot, illustrates that failure occurs in infusion, is equally also required to notify medical staff.
When sensor one and the significantly different output electric current of sensor two, there are two kinds of situations.The first is sensor one
Output electric current be significantly less than the output electric current of sensor two, illustrate that sensor breaks down, need to export alarm signal, carry out
Maintenance；Second situation is that the output electric current of sensor one is significantly greater than the output electric current of sensor two, illustrates to deposit in black luxuriant and rich with fragrance pot
In medical fluid, and that full of the luxuriant and rich with fragrance pot of ink, such situation does not belong to normal infusion state, output alarm signal is not needed.
In conclusion output electric current (output voltage) > sensor two output electric current (voltage) of only sensor one
When, it does not need to alarm, other situations are required to alarm.
Referring to Fig. 3, conversion circuit:
Since infusion is a slowly varying process, and the output voltage of sensor and electric current are a transient, Ke Nengshou
Extraneous interference and false alarm needs to convert the transient of sensor using conversion circuit to reduce and eliminate false alarm
For a quasi-steady value.
Simple conversion circuit includes power supply, LED current-limiting resistance R1 and resistance (R2) capacitor (C1) parallel circuit, such as
Shown in the following figure.The capacitance of capacitor is generally bigger, such as tens microfarads, and specific value is determined by test.The output of conversion circuit
For endpoint e.Then in endpoint e output voltage Ve1 after the converted circuit of sensor 1, then in endpoint e after the converted circuit of sensor 2
Output voltage Ve2.
Referring to fig. 4, comparison circuit:
Using subtraction operational amplifier circuit, as shown below；In figure, Ve1 is the output voltage of endpoint, is the output voltage of endpoint.Under
Four resistance in figure are equal, i.e. R3=R4=R5=R6, then output voltage Vout=Ve2-Ve1 of the Ausgang of comparison circuit.
Referring to Fig. 5, execution circuit:
Execution circuit can take various forms, and main purpose is to issue various signals, such as light, sound, remind patient and
Family members or medical staff.
In figure, resistance R7 limits the base current of D5 within the allowable range, reduces power consumption, and resistance R8 limits D5 conducting
The triode electric current of period within the allowable range, reduces power consumption.
When output electric current (output voltage) > sensor two output electric current (voltage) of sensor one, do not need to report
Alert, Vout > 0, triode D5 conducting, the base voltage of triode D6 are that zero, D6 is disconnected at this time, and buzzer does not work；
When output electric current (output voltage)≤sensor two output electric current (voltage) of sensor one, Vout≤0,
D5 is disconnected, and D6 conducting, buzzer is started to work, and realizes the purpose of alarm.
Supplementary explanation:
VCC in all circuits is the same power supply；Ground connection in all circuits is the same ground connection.
Referring to Fig. 6 be flow chart, Fig. 7 is warning device general illustration:
Overall system design figure is as follows.Including functional modules such as sensor, conversion circuit, comparison circuit, execution circuits.
Sensor one and sensor two measure different location, and export electric current；Current output sensor passes through conversion circuit
Be converted to the positive voltage or no-voltage of logic circuit；The positive voltage or no-voltage of conversion circuit output are input in comparison circuit,
The logic circuit of comparison circuit completes corresponding movement by calculating output control model, control execution circuit.
Claims (3)
1. a kind of liquid-level detecting method of the luxuriant and rich with fragrance pot of ink, characterized by the following steps:
S1: the light of detection sensor one and sensor two and it is converted to voltage signal respectively；
Sensor in endpoint e output voltage Ve1, then exports after the converted circuit of sensor two in endpoint e after conversion circuit
Voltage Ve2；
S2: the voltage signal of S1 step is transferred to data processor and is compared；
S3: the output voltage Vout=Ve2-Ve1 of the output end of comparison circuit；
When sensor one and sensor two export electric current it is same or similar when, illustrate the luxuriant and rich with fragrance pot of the ink of perfusion tube there are two kinds of situations,
One is being all air in black luxuriant and rich with fragrance pot, this illustrates that infusion has been completed；Another situation is that being entirely liquid in ink phenanthrene pot, say
There is failure in bright infusion；
When sensor one and the significantly different output electric current of sensor two, there are two kinds of situations；The first is the defeated of sensor one
Electric current is significantly less than the output electric current of sensor two out, illustrates that sensor breaks down, needs to export alarm signal, be examined
It repairs；Second situation is that the output electric current of sensor one is significantly greater than the output electric current of sensor two, illustrates exist in black luxuriant and rich with fragrance pot
Medical fluid, and that full of the luxuriant and rich with fragrance pot of ink, such situation does not belong to normal infusion state.
2. liquid-level detecting method as described in claim 1, characterized by the following steps:
S4: it when the output voltage of output voltage > sensor two of sensor one, does not need to alarm, i.e. Vout > 0, buzzer is not
Work；When the output voltage of output voltage≤sensor two of sensor one, Vout≤0, buzzer is started to work, and realizes report
Alert purpose.
3. liquid-level detecting method as described in claim 1, it is characterised in that:
Wherein, sensor is made of a RF transmitter, infrared absorber and two light pipes；It is RF transmitter, red
Outer absorber is respectively placed in the light pipe of the two sides on black luxuriant and rich with fragrance pot same level face；
Sensor one is set to the top of black luxuriant and rich with fragrance pot, and sensor two is set to the lower part of black luxuriant and rich with fragrance pot.
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| CN201910069495.6A CN109764941A (en) | 2019-01-24 | 2019-01-24 | A kind of liquid-level detecting method of the luxuriant and rich with fragrance pot of ink |
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| CN201910069495.6A CN109764941A (en) | 2019-01-24 | 2019-01-24 | A kind of liquid-level detecting method of the luxuriant and rich with fragrance pot of ink |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2722925Y (en) * | 2004-04-16 | 2005-09-07 | 纪树梅 | Multifunction portable transfusion monitor |
| CN102284105A (en) * | 2011-07-21 | 2011-12-21 | 上海电机学院 | Infusion alarm device |
| CN203561404U (en) * | 2013-10-31 | 2014-04-23 | 长城信息产业股份有限公司 | Liquid level detection device of transfusion drip chamber |
| CN205961971U (en) * | 2016-08-23 | 2017-02-22 | 陈新华 | Trees infusion automatic monitoring device |
-
2019
- 2019-01-24 CN CN201910069495.6A patent/CN109764941A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2722925Y (en) * | 2004-04-16 | 2005-09-07 | 纪树梅 | Multifunction portable transfusion monitor |
| CN102284105A (en) * | 2011-07-21 | 2011-12-21 | 上海电机学院 | Infusion alarm device |
| CN203561404U (en) * | 2013-10-31 | 2014-04-23 | 长城信息产业股份有限公司 | Liquid level detection device of transfusion drip chamber |
| CN205961971U (en) * | 2016-08-23 | 2017-02-22 | 陈新华 | Trees infusion automatic monitoring device |
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