CN209400044U - A kind of biliquid level detecting apparatus and warning device for black luxuriant and rich with fragrance pot - Google Patents

Abstract

The utility model provides a kind of biliquid level detecting apparatus and warning device for black luxuriant and rich with fragrance pot, including an ink luxuriant and rich with fragrance pot, two sensors, conversion circuit, control circuits；The sensor is made of a RF transmitter, infrared absorber and two light pipes；The RF transmitter, infrared absorber are respectively placed in the light pipe of the two sides on ink luxuriant and rich with fragrance pot same level face；Sensor one is set to the top of the luxuriant and rich with fragrance pot of the ink, and sensor two is set to the lower part of the luxuriant and rich with fragrance pot of the ink, and the input terminal and output end of sensor are respectively equipped with conversion circuit；Sensor one and sensor two in the mutually perpendicular two pairs of sensors of same level respectively by constituting；Sensor exports two voltages Ve3, Ve4 in endpoint e after endpoint e output two voltages Ve1, Ve2, the converted circuit of the sensor two after conversion circuit.The technical solution of the utility model is easy to operate, accuracy is higher.

Description

A kind of biliquid level detecting apparatus and warning device for black luxuriant and rich with fragrance pot

Technical field

The utility model 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 disclosure of the invention It is a kind of using level sensing and single-chip microcontroller as the infusion alarm system of core, including power module, photoelectric sensor, compares Device, single-chip microcontroller, LED light, 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, defeated for detecting Liquid pipe liquid；Comparator is a voltage comparator；When perfusion tube has liquid, the phototriode of photoelectric sensor receive compared with The strong infrared light issued by infrared diode, the electric current for flowing through phototriode circuit is larger, thus voltage comparator is 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 does not have When having liquid, the phototriode of photoelectric sensor receives the weaker infrared light issued by infrared diode, flows through photosensitive The electric current of transistor 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 also infused simultaneously Pipe 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 utility model provides one kind at three kinds in different conditions Lower Jimo phenanthrene pot does not have liquid, partly fills detection device under state and hydraulically full.

The technical solution of the utility model is:

A kind of liquid level detection device for black luxuriant and rich with fragrance pot, including an ink luxuriant and rich with fragrance pot, two sensors, conversion circuit, controls Circuit；Sensor is made of a RF transmitter, infrared absorber and two light pipes；RF transmitter, infrared suction In the light pipe for receiving the two sides that device is respectively placed 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, sensor one and sensing Device two in the mutually perpendicular two pairs of sensors of same level respectively by constituting；

The input terminal and output end of sensor are respectively equipped with conversion circuit；

Sensor exports two voltages Ve1, Ve2 in endpoint e after conversion circuit, after the converted circuit of sensor two Endpoint e exports two voltages Ve3, Ve4；

Control circuit is including an A/D conversion circuit and for controlling tetra- input signal numerical value of Ve1, Ve2, Ve3, Ve4 Comparison and state judgement controller.

Further, above controller is embedded controller,

When normal infusion, aforementioned four signal meets following relationship simultaneously:

a)-0.2<(Ve1-Ve2)/Ve2<0.2；

b)-0.2<(Ve3-Ve4)/Ve4<0.2；

C) -0.7>(Ve1-Ve3)/Ve3 or 0.7<(Ve1-Ve3)/Ve3；

Other situations are abnormal condition, illustrate that following failure or mistake occurs:

A) sensor degradation；

B) infusion has been completed.

Further, above-mentioned RF transmitter, infrared absorber are respectively a LED light emitting diode D1 and a light Quick triode D2.

Further, the output end of the sensor and output end are respectively equipped with conversion circuit, conversion circuit include power supply, LED current-limiting resistance R1 and a resistance (R2) and capacitor (C1) parallel circuit.

A kind of double liquid level detection warning device for the luxuriant and rich with fragrance pot of ink including above-mentioned biliquid level detecting apparatus, level sensing Device further includes an execution circuit,

It when normal infusion, does not need to alarm, at this time Vout > 0, buzzer does not work；

When breaking down or being wrong, Vout≤0, buzzer is started to work.

Further, above-mentioned 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 hair of collector c connection the power supply VCC, D6 of D6 One end of emitter-base bandgap grading e connection buzzer, the both ends of resistance R8 are separately connected the collector C of the power supply VCC and D5.

In general, the utility model the above technical solutions conceived by the present invention are compared with the prior art, Technical solution is easy to operate, accuracy is higher.

Detailed description of the invention

Fig. 1 is the schematic diagram of the biliquid level detecting apparatus of the luxuriant and rich with fragrance pot of ink of the utility model；

Fig. 2 is that two sensors in the same section of biliquid level detecting apparatus of the luxuriant and rich with fragrance pot of ink of the utility model overlook signal Figure；

Fig. 3 is the conversion circuit schematic diagram of the utility model；

Fig. 4 is the control circuit schematic diagram of the utility model；

Fig. 5 is the warning circuit schematic diagram of the utility model；

Fig. 6 is the alarm flow schematic diagram of the biliquid level detecting apparatus of the luxuriant and rich with fragrance pot of ink of the utility model；

Fig. 7 is the ADC0809 pin configuration schematic diagram of the utility model；

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 purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.In addition, institute in the various embodiments of the present invention described below The technical characteristic being related to can be combined with each other as long as they do not conflict with each other.

Referring to Fig. 1, a kind of biliquid level detecting apparatus 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；Wherein One group of sensor (sensor one) is 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 junction of light sensitive characteristic is by light radiation, photoelectric current is formed, resulting photogenerated current enters emitter by base stage, thus 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 when output electric current (output voltage) > sensor two output electric current (voltage) of only sensor one, It does not need to alarm, other situations are required to alarm.

Referring to fig. 2, be black luxuriant and rich with fragrance pot the same section of liquid level detection device two sensor schematic top plan views；Namely exist The liquid level detection device of black phenanthrene pot shares 2 groups, i.e., each one group upper and lower, is above sensor one, is below sensor two.

Every group of structure in the mutually perpendicular two pairs of sensors of same level is as shown in Figure 2, and each pair of sensor includes One LED light emitting diode D1, a phototriode D2, two light pipes；Light pipe is opaque tubular structure, can be adopted With the materials such as such as opaque plastics pipe.

Referring to Fig. 3, conversion circuit:

Since infusion is a gradual process, and the output voltage of sensor and electric current are a transients, may be by outer The interference on boundary and false alarm needs to be converted to the transient of sensor using conversion circuit to reduce and eliminate false alarm One stationary value.

Simple conversion circuit includes power supply, LED current-limiting resistance R1 and a resistance R2 and capacitor (C1) parallel circuit, electricity The capacitance of appearance is generally bigger, such as tens microfarads, and specific value is determined by test.The output of conversion circuit is endpoint e.Then pass Sensor exports two voltages Ve1, Ve2 in endpoint e after conversion circuit, then defeated in endpoint e after the converted circuit of sensor two Two voltages Ve3, Ve4 out.

Referring to fig. 4, control circuit:

Control circuit includes A/D conversion circuit, embedded controller.Input signal is Ve1, Ve2, Ve3, Ve4, output letter Number be execution circuit driving signal.

The type of A/D conversion chip is very more, and the standard of selection is mainly cost, conversion time, simulation input port Quantity etc..This patent without limitation, is only arranged in physical circuit and is cited an actual example in right item, a kind of A/D circuit of selection Using chip ADC0809.Its major parameter is as follows:

Simulation input port quantity: 8

Conversion time: 128us

Output data: 8

The type of embedded controller is also very more, and the chip that can choose includes C51, Z80, ARM, FPGA, X86 etc.. This patent without limitation, is only arranged in physical circuit and is cited an actual example, using AT89C51 single-chip microcontroller in right item.

The physical circuit figure of control circuit is as follows, and main pin and connecting wire, power supply, clock are only listed in circuit diagram Crystal oscillator, reset etc. assist pin and wiring unlisted.

ADC0809 chip, which illustrates, sees annex

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 and suffer from Person and family members or medical staff.

Execution circuit is two resistance and two triodes, one end of the base stage b connection resistance R7 of triode D5, the collection of D5 The emitter e of the base stage b, D5 of electrode C connection D6 are grounded, and the emitter e of collector c connection the power supply VCC, D6 of D6 connect buzzing One end of device, the both ends of resistance R8 are separately connected the collector C of the power supply VCC and D5.In figure, resistance R7 limits the base stage of D5 Electric current within the allowable range, reduces power consumption, and resistance R8 limits the triode electric current during D5 conducting within the allowable range, reduces function Consumption.

Ve1 and Ve2 are mutually backups, and Ve3 and Ve4 are mutually backups, four input signal numerical value such as Ve1, Ve2, Ve3, Ve4 Comparison and state judgement are as follows.

1, when normal infusion, aforementioned four signal meets following relationship simultaneously:

a)-0.2<(Ve1-Ve2)/Ve2<0.2；

b)-0.2<(Ve3-Ve4)/Ve4<0.2；

C) -0.7>(Ve1-Ve3)/Ve3 or 0.7<(Ve1-Ve3)/Ve3；

Illustrate: above-mentioned -0.7, the numerical value such as -0.2,0.2,0.7 are citing, and specific value is determined according to test.

2, other situations are abnormal condition, illustrate that following failure or mistake occurs, need to alarm:

A) sensor degradation；

B) infusion has been completed.

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, flow chart:

Overall system design figure is as follows.Including the functions mould such as sensor, conversion circuit, comparison circuit, execution circuit Block.

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.

Referring to Fig. 7, ADC0809 pin configuration function declaration figure:

1~5,26~28, the IN0~road IN7:8 analog input end.

14~15,8,17~21, D0~D7:8 bit digital quantity output end.

23~25, ADDA, ADDB, ADDC:3 bit address input line, for gating in 8 tunnel simulation inputs all the way

22, ALE: address latch allows signal, and input, high level is effective, and edge is jumped on corresponding A LE, and A, B, C address state are sent Enter in address latch.

6, START:A/D conversion starting signals, input high level is effective, when START rising edge, resets ADC0809； Bootrom when START failing edge starts to carry out A/D conversion；In the A/D transition period, START should keep low level.This signal Sometimes it is abbreviated as ST.

7, EOC:A/D conversion end signals, output, when A/D conversion end, this end exports a high level (transition period Between always be low level).

9, OE: data output allows signal, inputs, and high level is effective.When A/D conversion end, this end inputs a height Level could open output tri-state gate, export digital quantity, be converted to for controlling ternary output latch to single-chip microcontroller output Data.OE=0, output data line are in high resistant；OE=1 exports the data being converted to.

10, CLK: clock pulse input terminal.It is required that clock frequency is not higher than 640KHZ, EOC=0, converted； EOC=1, conversion end.The status signal can be used as the Status Flag of inquiry in use, make but also as interrupt request singal With.

12,16, REF (+), REF (-): reference voltage.

11, Vcc: power supply, single+5V.

13, GND: ground.

Specifically, sensor one and sensor two measure different location, and export electric current；Current output sensor is by turning Change the positive voltage or no-voltage that circuit conversion is logic circuit；It is electric that the positive voltage or no-voltage of conversion circuit output are input to comparison Lu Zhong, the logic circuit of comparison circuit complete alarm or do not alarm corresponding by calculating output control model, control execution circuit Movement.

Claims (6)

1. a kind of biliquid level detecting apparatus for black luxuriant and rich with fragrance pot, including an ink luxuriant and rich with fragrance pot, two sensors, conversion circuit, controls Circuit；The sensor is made of a RF transmitter, infrared absorber and two light pipes；The infrared ray transmitting Device, infrared absorber are 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 sensor one and sensor two in the mutually perpendicular two pairs of sensors of same level respectively by constituting；

The input terminal and output end of the sensor are respectively equipped with conversion circuit；

The sensor exports two voltages Ve1, Ve2, the converted circuit of the sensor two in endpoint e after conversion circuit Two voltages Ve3, Ve4 are exported in endpoint e afterwards；

The control circuit is including an A/D conversion circuit and for controlling tetra- input signal numerical value of Ve1, Ve2, Ve3, Ve4 Comparison and state judgement controller.

2. biliquid level detecting apparatus as described in claim 1, which is characterized in that the controller is embedded controller,

When normal infusion, aforementioned four signal meets following relationship simultaneously:

a)-0.2<(Ve1-Ve2)/Ve2<0.2;

b)-0.2<(Ve3-Ve4)/Ve4<0.2;

C) -0.7>(Ve1-Ve3)/Ve3 or 0.7<(Ve1-Ve3)/Ve3;

Other situations are abnormal condition, illustrate that following failure or mistake occurs:

A) sensor degradation；

B) infusion has been completed.

3. biliquid level detecting apparatus as described in claim 1, which is characterized in that the RF transmitter, infrared absorber An a respectively LED light emitting diode D1 and phototriode D2.

4. biliquid level detecting apparatus as described in claim 1, which is characterized in that the conversion circuit includes power supply, LED current limliting A resistance R1 and resistance R2 and capacitor C1 parallel circuit.

5. a kind of including being used for the luxuriant and rich with fragrance pot of ink for the biliquid level detecting apparatus of the luxuriant and rich with fragrance pot of ink described in claims 1 or 2 or 3 or 4 Double liquid level detect warning device, which is characterized in that the liquid level detection device further includes an execution circuit,

It when normal infusion, does not need to alarm, at this time Vout > 0, buzzer does not work；

When breaking down or being wrong, Vout≤0, buzzer is started to work.

6. double liquid level as claimed in claim 5 detects warning device, which is characterized in that the execution circuit be 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, resistance R8 Both ends be separately connected the collector C of the power supply VCC and D5.