CN109764939A - A kind of liquid level detection device and warning device of the luxuriant and rich with fragrance pot of ink - Google Patents
A kind of liquid level detection device and warning device of the luxuriant and rich with fragrance pot of ink Download PDFInfo
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- CN109764939A CN109764939A CN201910068655.5A CN201910068655A CN109764939A CN 109764939 A CN109764939 A CN 109764939A CN 201910068655 A CN201910068655 A CN 201910068655A CN 109764939 A CN109764939 A CN 109764939A
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- 239000003205 fragrance Substances 0.000 title claims abstract description 52
- 239000007788 liquid Substances 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 239000006096 absorbing agent Substances 0.000 claims abstract description 9
- 238000001802 infusion Methods 0.000 claims description 32
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 230000010412 perfusion Effects 0.000 claims description 10
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
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- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 3
- 239000000463 material Substances 0.000 description 3
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- 239000004065 semiconductor Substances 0.000 description 3
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
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- 230000005693 optoelectronics Effects 0.000 description 1
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- 230000005855 radiation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention provides the liquid level detection devices and warning device of a kind of luxuriant and rich with fragrance pot of ink, including a luxuriant and rich with fragrance pot of ink and two sensors；Sensor is made of a RF transmitter, infrared absorber and two light pipes；RF 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；Light pipe on RF transmitter is by ink luxuriant and rich with fragrance pot one end to having a reflector one；Light pipe on infrared absorber is equipped with a reflector two by ink luxuriant and rich with fragrance pot one end upwards；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.The present invention only in output electric current (output voltage) > sensor two output electric current (voltage) of sensor one, does not need to alarm, other situations are required to alarm.
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 detecting
Perfusion tube liquid；Comparator is a voltage comparator；When perfusion tube has liquid, the phototriode of photoelectric sensor is received
The stronger infrared light issued by infrared diode, the electric current for flowing through phototriode circuit is larger, thus voltage comparator
Negative voltage reduces, and exports high level, and alarm does not do any movement, and infusion continues；When infusion draws to an end, i.e. perfusion tube
When not having liquid, the phototriode of photoelectric sensor receives the weaker infrared light issued by infrared diode, flows through light
The electric current of quick transistor circuit is smaller, and electric current changes significantly, thus the negative voltage of voltage comparator increases, and exports low electricity
It is flat.But there is situation to be being entirely liquid in black luxuriant and rich with fragrance pot, illustrate that failure occurs in infusion, be equally also required to notice medical care people
Member, but the 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 under three kinds of different conditions Jimo
Luxuriant and rich with fragrance pot does not have liquid, partly fills detection device under state and hydraulically full.
The technical scheme is that
A kind of liquid level detection device of the luxuriant and rich with fragrance pot of ink, including the luxuriant and rich with fragrance pot of an ink, two sensors, conversion circuit and comparison circuit；It passes
Sensor is made of a RF transmitter, infrared absorber and two light pipes；RF transmitter, infrared absorber difference
It is 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,
The input terminal and output end of sensor are respectively equipped with conversion circuit；
Conversion circuit be used for after the converted circuit of sensor 1 in endpoint e output voltage Ve1, then after the converted circuit of sensor 2
In endpoint e output voltage Ve2；
Output voltage Vout=Ve2-Ve1 of the output end of comparison circuit；
When sensor one is with two output voltage of sensor or same or similar electric current, illustrate that there are two kinds for the luxuriant and rich with fragrance pot of the ink of perfusion tube
Situation: 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, illustrate that failure occurs in infusion；
When sensor one and two output voltage of sensor or significantly different electric current, there are two kinds of situations:
The first output voltage for being sensor one or electric current are significantly less than the output electric current of sensor two, illustrate that sensor occurs
Failure；
Second situation is the output voltage of sensor one or electric current is significantly greater than the output electric current of sensor two, illustrates black luxuriant and rich with fragrance pot
In there are medical fluids, and that full of the luxuriant and rich with fragrance pot of ink, such situation does not belong to normal infusion state.
Further, above-mentioned RF transmitter, infrared absorber are respectively a LED light emitting diode D1 and a light
Quick triode D2.
Further, above-mentioned conversion circuit include power supply, LED current-limiting resistance R1 and a resistance (R2) and capacitor (C1) simultaneously
Join circuit.
A kind of warning device of the liquid level detection device including the luxuriant and rich with fragrance pot of any one of the above ink, liquid level detection device also wrap
An execution circuit is included,
When output electric current (output voltage) > sensor two output electric current (voltage) of sensor one, do not need to alarm, this
When Vout > 0, buzzer do not work；
When output electric current (output voltage)≤sensor two output electric current (voltage) of sensor one, Vout≤0, bee
The device that rings is started to work.
Further, above-mentioned execution circuit is two resistance and two triodes, the base stage b connection resistance of triode D5
One end of R7, the emitter e ground connection of the base stage b, D5 of the collector C connection D6 of D5, the collector c connection power supply V of D6
One end of the emitter e connection buzzer of CC, D6, the both ends of resistance R8 are separately connected the current collection of power supply VCC and D5
Pole C.
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 alarm 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 as shown in Figure 1, each pair of sensor include a LED light emitting diode D1,
One phototriode D2, two light pipes 23；Light pipe 23 is opaque tubular structure, can be using such as opaque plastics pipe
Equal materials.
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 Fig. 3.The capacitance of capacitor is generally bigger, such as tens microfarads, and specific value is determined by test.The output of conversion circuit is
Endpoint e.It is then in endpoint e output voltage Ve1 after the converted circuit of sensor 1, then defeated in endpoint e after the converted circuit of sensor 2
Voltage Ve2 out.
Referring to fig. 4, comparison circuit:
Using subtraction operational amplifier circuit, as shown below；Ve1 is the output voltage of endpoint, is the output voltage of endpoint.In Fig. 4
Four resistance 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, wherein execution circuit is two resistance and two triodes, the base stage b connection resistance R7 of triode D5
One end, the base stage b, D5 of the collector C connection D6 of D5 emitter e ground connection, the collector c connection power supply VC of D6
One end of the emitter e connection buzzer of C, D6, the both ends of resistance R8 are separately connected the collector of power supply VCC and D5
C.
Resistance R7 limits the base current of D5 within the allowable range, reduces power consumption, during resistance R8 limits D5 conducting
Triode electric current within the allowable range, reduce 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, Fig. 7, flow chart and 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 (5)
1. a kind of liquid level detection device of the luxuriant and rich with fragrance pot of ink, including the luxuriant and rich with fragrance pot of an ink, two sensors, conversion circuit and comparison circuit；
The sensor is made of a RF transmitter, infrared absorber and two light pipes；It is the RF transmitter, infrared
Absorber is respectively placed in the light pipe of the two sides on ink luxuriant and rich with fragrance pot same level face；
It is characterized in that, sensor one is set to the top of the luxuriant and rich with fragrance pot of the ink, sensor two is set to the lower part of the luxuriant and rich with fragrance pot of the ink,
The input terminal and output end of the sensor are respectively equipped with conversion circuit；
The conversion circuit be used for after the converted circuit of sensor 1 in endpoint e output voltage Ve1, then the converted electricity of sensor 2
In endpoint e output voltage Ve2 behind road；
The output voltage Vout=Ve2-Ve1 of the output end of the comparison circuit；
When the sensor one is with two output voltage of sensor or same or similar electric current, illustrate that the luxuriant and rich with fragrance pot of the ink of perfusion tube exists
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, illustrate that failure occurs in infusion；
When the sensor one and two output voltage of sensor or significantly different electric current, there are two kinds of situations:
The first output voltage for being sensor one or electric current are significantly less than the output electric current of sensor two, illustrate that sensor occurs
Failure；
Second situation is the output voltage of sensor one or electric current is significantly greater than the output electric current of sensor two, illustrates black luxuriant and rich with fragrance pot
In there are medical fluids, 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 detection device as described in claim 1, which is characterized in that the RF transmitter, infrared absorber point
It Wei not an a LED light emitting diode D1 and phototriode D2.
3. liquid level detection device as described in claim 1, which is characterized in that the conversion circuit includes power supply, LED current limliting electricity
Hinder R1 and resistance (R2) and capacitor (C1) parallel circuit.
4. a kind of warning device of the liquid level detection device including the luxuriant and rich with fragrance pot of any one ink of claim 1-3, which is characterized in that
The liquid level detection device further includes an execution circuit,
When output electric current (output voltage) > sensor two output electric current (voltage) of sensor one, do not need to alarm, at this time
Vout > 0, buzzer do not work；
When output electric current (output voltage)≤sensor two output electric current (voltage) of sensor one, Vout≤0, buzzer
It starts to work.
5. the warning device of liquid level detection device as claimed in claim 4, which is characterized in that the execution circuit is two
Resistance and two triodes, one end of the base stage b connection resistance R7 of triode D5, the base stage b, D5 of the collector C connection D6 of D5
Emitter e ground connection, the emitter e of collector c connection the power supply VCC, D6 of D6 connects one end of buzzer, the both ends of resistance R8
It is separately connected the collector C of the power supply VCC and D5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112043914A (en) * | 2020-08-26 | 2020-12-08 | 深圳市道尔智控科技有限公司 | Liquid detection system of infusion pipeline |
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| CN108671324A (en) * | 2018-05-27 | 2018-10-19 | 成都氪睿科技有限公司 | A kind of real-time infusion monitoring system of stabilization based on ZigBee wireless communications |
| CN209400046U (en) * | 2019-01-24 | 2019-09-17 | 湖北科技学院 | A kind of liquid level detection device of the luxuriant and rich with fragrance pot of ink |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112043914A (en) * | 2020-08-26 | 2020-12-08 | 深圳市道尔智控科技有限公司 | Liquid detection system of infusion pipeline |
| CN112043914B (en) * | 2020-08-26 | 2023-03-14 | 深圳市道尔智控科技有限公司 | Liquid detection system of infusion pipeline |
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