CN220778795U - Bubble detection circuit and device in infusion tube - Google Patents
Bubble detection circuit and device in infusion tube Download PDFInfo
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- CN220778795U CN220778795U CN202321994584.XU CN202321994584U CN220778795U CN 220778795 U CN220778795 U CN 220778795U CN 202321994584 U CN202321994584 U CN 202321994584U CN 220778795 U CN220778795 U CN 220778795U
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- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010001526 Air embolism Diseases 0.000 description 1
- 206010008190 Cerebrovascular accident Diseases 0.000 description 1
- 208000005189 Embolism Diseases 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
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- 210000004204 blood vessel Anatomy 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of medical electronics, and provides a bubble detection circuit and a bubble detection device in an infusion tube, wherein the circuit comprises a photoelectric sensor, a voltage regulation module and a voltage comparison and signal output module, the infusion tube is arranged between a transmitting diode and a receiving diode of the photoelectric sensor, the voltage comparison and signal output module is respectively connected with the photoelectric sensor and the voltage regulation module, the photoelectric sensor outputs detection voltage according to a liquid state, the voltage regulation module adjusts the input voltage into reference voltage and then outputs the reference voltage, the voltage comparison and signal output module compares the detection voltage with the reference voltage to obtain a comparison result, the comparison result is output in a digital signal form, and the liquid state in the infusion tube corresponding to the comparison result is displayed. The circuit and the device for detecting the bubbles in the infusion tube are simple in structure, low in cost, convenient to operate, convenient to judge whether bubbles exist in the infusion tube in time, and high in accuracy of judging results.
Description
Technical Field
The utility model relates to the technical field of medical electronics, in particular to a circuit and a device for detecting bubbles in an infusion tube.
Background
In the process of infusion treatment of a patient, if bubbles remain in the infusion tube, a plurality of adverse effects can be generated on the body of the patient, for example, medicines can not smoothly reach the blood circulation system of the patient, so that the treatment effect is reduced, and the bubbles in the infusion tube enter the blood circulation system and possibly block blood flow through blood vessels, so that vascular embolism is caused, serious complications such as heart disease or cerebral apoplexy are caused, thrombus and air embolism are formed, and the risk of thrombotic diseases is increased.
In the prior art, a medical staff is usually required to visually inspect or use a specific transparent part of the infusion tube to check bubbles in the liquid, but the detection accuracy of the method for bubbles with smaller volume is lower. And can also use the ultrasonic technology to detect the bubble in the transfer line under the specific condition, the sound wave can produce the echo on bubble and liquid interface, thus produce the ultrasonic image, the medical personnel judges whether there is bubble in the transfer line through observing the ultrasonic image, this method has higher accuracy and sensibility, but the cost is higher and the operation is complicated.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a circuit and a device for detecting bubbles in a transfusion tube, which solve the technical problems that the cost for detecting the bubbles in the transfusion tube is high, the operation is complex and the accuracy of a detection result cannot be ensured in the prior art.
In one aspect, the present utility model provides a circuit for detecting bubbles in a liquid transfer tube, including: the photoelectric sensor, the voltage regulating module and the voltage comparison and signal output module are used for detecting the voltage of the power supply;
the infusion tube passes through the photoelectric sensor and is arranged between a transmitting diode and a receiving diode of the photoelectric sensor;
the positive electrode of the emitting diode is connected with the power supply end, the negative electrode of the emitting diode is connected with the grounding end, the positive electrode of the receiving diode is connected with the power supply end, the negative electrode of the receiving diode is respectively connected with the grounding end and the first input end of the voltage comparison and signal output module, and the photoelectric sensor outputs detection voltage corresponding to the liquid state according to the liquid state in the infusion tube and transmits the detection voltage to the voltage comparison and signal output module, wherein the liquid state comprises bubbles in the liquid and no bubbles in the liquid;
the input end of the voltage regulating module is connected with the power supply end, the output end of the voltage regulating module is connected with the grounding end, the regulating end of the voltage regulating module is connected with the second input end of the voltage comparing and signal outputting module, and the voltage regulating module is used for regulating the input voltage of the power supply end into the reference voltage and outputting the reference voltage to the voltage comparing and signal outputting module;
the voltage comparison and signal output module is used for comparing the detection voltage with the reference voltage to obtain a comparison result, outputting the comparison result in a digital signal form, and displaying the liquid state in the infusion tube corresponding to the comparison result.
Optionally, the bubble detection circuit in the infusion tube further comprises a first adjustable resistor and a first resistor;
the input end of the first adjustable resistor is connected with the power supply end, the output end of the first adjustable resistor is connected with the positive electrode of the emitting diode, and the adjusting end of the first adjustable resistor is connected with the positive electrode of the emitting diode;
and the cathode of the receiving diode is connected with the grounding end through the first resistor.
Optionally, the voltage comparing and signal outputting module comprises a first voltage comparing and signal outputting unit and a second voltage comparing and signal outputting unit;
the negative electrode of the receiving diode is connected with the first input end of the first voltage comparison and signal output unit, the regulating end of the voltage regulating module is connected with the second input end of the first voltage comparison and signal output unit, and the output end of the first voltage comparison and signal output unit is connected with the power supply end;
the negative electrode of the receiving diode is connected with the second input end of the second voltage comparison and signal output unit, the regulating end of the voltage regulating module is connected with the first input end of the second voltage comparison and signal output unit, and the output end of the second voltage comparison and signal output unit is connected with the power supply end.
Optionally, the first voltage comparison and signal output unit includes a first comparator and a second resistor;
the negative electrode of the first comparator is connected with the negative electrode of the receiving diode, the positive electrode of the first comparator is connected with the regulating end of the voltage regulating module, the positive electrode of the power supply of the first comparator is connected with the power supply end, and the negative electrode of the power supply of the first comparator is connected with the grounding end;
the second resistor is connected between a power supply end and an output end of the first comparator.
Optionally, the second voltage comparison and signal output unit comprises a second comparator, a third resistor and an alarm;
the positive electrode of the second comparator is connected with the negative electrode of the receiving diode, the negative electrode of the second comparator is connected with the regulating end of the voltage regulating module, the positive electrode of the power supply of the second comparator is connected with the power supply end, and the negative electrode of the power supply of the second comparator is connected with the grounding end;
the input end of the alarm is connected with the power end through the third resistor, and the output end of the alarm is connected with the output end of the second comparator.
Optionally, the alarm is at least one of a buzzer, an indicator light and a vibration motor.
Optionally, the voltage regulation module includes a second adjustable resistor;
the input end of the second adjustable resistor is connected with the power supply end, the output end of the second adjustable resistor is connected with the grounding end, and the adjusting end of the second adjustable resistor is respectively connected with the second input end of the first voltage comparison and signal output unit and the first input end of the second voltage comparison and signal output unit.
Optionally, the infusion tube internal bubble detection circuit further comprises an output interface, wherein the output interface comprises a first output terminal, a second output terminal, a third output terminal, a fourth output terminal and a fifth output terminal;
the first output terminal is connected with a power supply end;
the second output terminal is connected with the regulating end of the voltage regulating module and is used for receiving and outputting the reference voltage;
the third output terminal is connected with the negative electrode of the receiving diode and is used for receiving and outputting the detection voltage;
the fourth output terminal is connected with the output end of the voltage comparison and signal output module and is used for receiving the comparison result and outputting the comparison result in a digital signal form;
the fifth output terminal is connected with the ground terminal.
Optionally, the photosensor is a transmissive photosensor.
Another aspect of the present utility model provides a device for detecting bubbles in an infusion tube, comprising: the in-tube bubble detection circuit and the result display device according to any one of the above;
the bubble detection circuit in the infusion tube is connected with the result device, and the result display device is used for displaying the detection result of the liquid state in the infusion tube.
According to the circuit and the device for detecting the bubbles in the infusion tube, provided by the utility model, the photoelectric sensor is used for detecting whether the bubbles exist in the liquid in the infusion tube, and the light change generated when the bubbles exist in the infusion tube is converted into the electric signal to be output, so that the photoelectric sensor has strong anti-interference capability, high sensitivity and high precision, and can accurately output the change difference characteristic; according to different types of infusion tubes and photoelectric sensors, a voltage adjusting module is arranged to adjust reference voltage, on one hand, voltage comparison and a signal output module are utilized to compare detection voltage with the reference voltage, whether bubbles exist in liquid in the infusion tubes or not is accurately judged through outputting different digital signals, on the other hand, the judgment result obtained by the voltage comparison and the signal output module can be displayed intuitively, and observation is facilitated. The bubble detection circuit in the transfer line that this application provided, simple structure is with low costs, convenient operation, whether in time judge the transfer line in have the bubble, the judgement result degree of accuracy is high.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the utility model is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic block diagram of a bubble detection circuit in an infusion tube according to one embodiment of the present disclosure;
fig. 2 is a circuit diagram of a bubble detection circuit in an infusion tube according to one embodiment of the present application.
Q1, a photoelectric sensor; u1, a first comparator; u2, a second comparator; r1, a first resistor; r2, a second resistor; r3, a third resistor; VR1, a first adjustable resistor; VR2, a first adjustable resistor; LED1, pilot lamp; VCC, power end; GND, ground terminal.
Detailed Description
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The utility model provides a bubble detection circuit in an infusion tube, as shown in fig. 1 and 2, the bubble detection circuit is used for detecting whether bubbles exist in liquid in the infusion tube, and comprises a photoelectric sensor Q1, a voltage regulating module and a voltage comparison and signal output module, wherein the infusion tube passes through the photoelectric sensor Q1 and is arranged between a transmitting diode and a receiving diode of the photoelectric sensor Q1, the positive electrode of the transmitting diode is connected with a power supply end VCC, the negative electrode of the transmitting diode is connected with a grounding end GND, the positive electrode of the receiving diode is connected with a power supply end VCC, the negative electrode of the receiving diode is respectively connected with the grounding end GND and a first input end of the voltage comparison and signal output module, the photoelectric sensor Q1 outputs detection voltages corresponding to the liquid states according to the liquid states in the infusion tube and transmits the detection voltages to the voltage comparison and signal output module, the liquid states comprise bubbles exist in the liquid and no bubbles exist in the liquid, the input end of the voltage regulating module is connected with the power supply end VCC, the output end of the voltage regulating module is connected with the grounding end VCC, the regulating end of the voltage regulating module is connected with the second input end of the voltage comparison and signal output end VCC of the voltage comparison and the signal output module is connected with the grounding end, the second input end of the voltage comparison and the signal output module is in a reference voltage comparison and voltage comparison result is obtained, and a reference voltage comparison and a digital signal comparison is obtained.
According to the bubble detection circuit in the infusion tube, whether bubbles exist in liquid in the infusion tube is detected by the photoelectric sensor Q1, the light change generated when the bubbles exist in the infusion tube is converted into an electric signal to be output, and the photoelectric sensor Q1 has strong anti-interference capability, high sensitivity and high precision and can accurately output change difference characteristics; according to different types of infusion tubes and photoelectric sensors Q1, a voltage adjusting module is arranged to adjust reference voltage, on one hand, voltage comparison and a signal output module are utilized to compare detection voltage with the reference voltage, whether bubbles exist in liquid in the infusion tubes or not is accurately judged through outputting different digital signals, on the other hand, the judgment result obtained by the voltage comparison and the signal output module can be displayed intuitively, and observation is facilitated. The bubble detection circuit in the transfer line that this application provided, simple structure is with low costs, convenient operation, whether in time judge the transfer line in have the bubble, the judgement result degree of accuracy is high.
Specifically, in the above embodiment, the bubble detection circuit in the infusion tube further includes a first adjustable resistor VR1 and a first resistor R1, where an input end of the first adjustable resistor VR1 is connected to the power supply end VCC, an output end of the first adjustable resistor VR1 is connected to an anode of the emitting diode, an adjusting end of the first adjustable resistor VR1 is connected to an anode of the emitting diode, and a cathode of the receiving diode is connected to the ground end GND through the first resistor R1.
In this embodiment, the photoelectric sensor Q1 specifically includes a transmitting diode and a receiving diode, the infusion tube is specifically disposed between the transmitting diode and the receiving diode in the photoelectric sensor Q1, and the working principle of the photoelectric sensor Q1 is that light emitted by the transmitting diode irradiates the receiving diode through the liquid in the infusion tube, and when no bubble exists in the infusion tube, the light emitted by the transmitting diode continuously irradiates the receiving diode, so as to maintain the stable state of the output signal of the receiving diode; when bubbles enter the infusion tube, the bubbles can block or scatter light rays emitted by the emitting diode, so that part of the light rays cannot directly reach the receiving diode, and the receiving diode can sense the change of the light rays due to the shielding or weakening of the light rays, and further the output signal is changed. Specifically, this application is connected with first adjustable resistance VR1 in emitting diode's positive pole department for receiving diode can realize analog signal's linear output through adjusting first adjustable resistance VR 1's resistance, and first adjustable resistance VR1 plays the guard action again to emitting diode simultaneously, prevents that it from damaging under high pressure environment. Before the actual detection process, after the infusion tube and the photoelectric sensor Q1 are selected and placed, testing is needed in advance, namely, the voltage values output by the receiving diode in two working states of no bubble and the bubble in the infusion tube are tested respectively, the voltage value output by the receiving diode is the detection voltage, and the difference value of the detection voltage output by the receiving diode in two different working states is increased by adjusting the resistance value of the first adjustable resistor VR1, so that data acquisition and comparison are facilitated. The first resistor R1 is connected between the negative electrode of the receiving diode and the ground terminal GND, and can limit current, stabilize signals, and improve the anti-interference capability of the photoelectric sensor Q1.
Specifically, in the above embodiment, the voltage comparing and signal outputting module includes a first voltage comparing and signal outputting unit and a second voltage comparing and signal outputting unit, where the negative pole of the receiving diode is connected to the first input end of the first voltage comparing and signal outputting unit, the adjusting end of the voltage adjusting module is connected to the second input end of the first voltage comparing and signal outputting unit, the output end of the first voltage comparing and signal outputting unit is connected to the power supply end VCC, the negative pole of the receiving diode is connected to the second input end of the second voltage comparing and signal outputting unit, the adjusting end of the voltage adjusting module is connected to the first input end of the second voltage comparing and signal outputting unit, and the output end of the second voltage comparing and signal outputting unit is connected to the power supply end VCC.
In this embodiment, the voltage comparing and signal outputting module specifically includes two first voltage comparing and signal outputting units and second voltage comparing and signal outputting units that implement different functions, where the two units have the same function of comparing voltages, and the difference is that, for the output form of the comparison result, the two voltage comparing and signal outputting units are respectively connected to the negative electrode of the receiving diode and the adjusting end of the voltage adjusting module, respectively receive the detection voltage output by the photosensor Q1 and the reference voltage output by the voltage adjusting module, and compare the detection voltage and the reference voltage, and the negative electrode of the receiving diode and the adjusting end of the voltage adjusting module are respectively connected to different input ends of the two voltage comparing and signal outputting units, so as to achieve the purpose of outputting different comparison results. The voltage comparison and signal output unit is arranged, the voltage comparison result can be output in two modes at the same time, the accuracy of the output result is ensured, and the error of the output result caused by a single output mode is avoided.
Further, the first voltage comparing and signal outputting unit comprises a first comparator U1 and a second resistor R2, wherein the negative electrode of the first comparator U1 is connected with the negative electrode of the receiving diode, the positive electrode of the first comparator U1 is connected with the adjusting end of the voltage adjusting module, the positive electrode of the power supply of the first comparator U1 is connected with the power supply end VCC, the negative electrode of the power supply of the first comparator U1 is connected with the grounding end GND, and the second resistor R2 is connected between the power supply end VCC and the output end of the first comparator U1.
The comparator is used for receiving and comparing two input signals, wherein one input is usually called a non-inverting input, the other input is usually called an inverting input, and after amplifying and comparing the input signals, the comparison result can be converted into a digital logic level to be output so as to show the magnitude relation between the two input signals.
In this embodiment, after the setting of the reference voltage of the voltage adjustment module is completed, the detection stage of the liquid in the infusion tube is entered, the detection voltage output by the cathode of the receiving diode of the photoelectric sensor Q1 enters the cathode of the first comparator U1, the reference voltage output by the voltage adjustment module enters the anode of the first comparator U1, the first comparator U1 is used for comparing the received detection voltage with the reference voltage to obtain a voltage comparison result, and the voltage comparison result is output as a digital signal, so that medical staff can accurately acquire the output signal to obtain the existence of bubbles in the infusion tube. Specifically, when there is a bubble in the infusion tube, the reference voltage is greater than the detection voltage, the first comparator U1 outputs a high level, the high level is easy to collect, when there is no bubble in the infusion tube, the detection voltage is greater than the reference voltage, the first comparator U1 outputs a low level, medical staff can judge whether there is a bubble in the liquid in the infusion tube through the collected digital signal output by the first comparator U1, namely the first comparator U1 outputs a high level to obtain that there is a bubble in the liquid in the infusion tube, the first comparator U1 outputs a low level to obtain that there is no bubble in the liquid in the infusion tube, and the judgment of the existence state of the bubble is simple and accurate. The second resistor R2 is connected between the power supply terminal VCC and the output terminal of the first comparator U1, and is used as a pull-up resistor to ensure the stability of signal output.
Specifically, in the above embodiment, the second voltage comparing and signal outputting unit includes the second comparator U2, the third resistor R3, and the alarm, where the positive electrode of the second comparator U2 is connected to the negative electrode of the receiving diode, the negative electrode of the second comparator U2 is connected to the adjusting end of the voltage adjusting module, the positive electrode of the second comparator U2 is connected to the power supply end VCC, the negative electrode of the second comparator U2 is connected to the ground end GND, the input end of the alarm is connected to the power supply end VCC through the third resistor R3, and the output end of the alarm is connected to the output end of the second comparator U2.
In this embodiment, the working principle and the implemented function of the second comparator U2 and the first comparator U1 are completely the same, where the negative electrode of the second comparator U2 receives the reference voltage output by the voltage adjustable module, the positive electrode of the second comparator U2 receives the detection voltage output by the photoelectric sensor Q1, the second comparator U2 is used to compare the reference voltage with the detection voltage, and the output end of the second comparator U2 is connected with an alarm, so that the alarm alarms when detecting that there is a bubble in the liquid in the infusion tube, and when the second comparator U2 completes the comparison of the reference voltage and the detection voltage, a voltage comparison result is obtained, and the voltage comparison result can determine the working state of the alarm, so as to determine whether there is a bubble in the liquid in the infusion tube. Specifically, when bubbles exist in the liquid in the infusion tube, the reference voltage is larger than the detection voltage, the second comparator U2 outputs a low level, the alarm is conducted, and the alarm works to generate alarm information; when no bubble exists in the liquid in the infusion tube, the detection voltage is larger than the reference voltage, the second comparator U2 outputs high level, the alarm does not work, and alarm information cannot be generated; medical staff can judge whether there is the bubble in the liquid in the transfer line through observing the operating condition of siren, then can know that there is the bubble in the transfer line promptly when the siren work, need in time handle, and then can know that there is not the bubble in the transfer line when the siren does not work, need not to intervene, introduce the siren and make the judgement to the bubble existing state more directly perceivedly simple, the medical staff of being convenient for first time discovers abnormal situation. The third resistor R3 is connected between the power supply terminal VCC and the positive electrode of the indicator light LED1, and also has protection functions such as current limiting protection, voltage dividing protection, and short circuit prevention for the alarm.
Further, the alarm is at least one of a buzzer, an indicator light LED1 and a vibration motor.
In this embodiment, the alarm is used for producing alarm information when there is the bubble in the liquid in the transfer line, specifically can select at least one of buzzer, pilot lamp LED1, vibrating motor, when selecting the buzzer, buzzer work produces the sound that is sharp and reminds medical staff that there is the bubble in the transfer line in time to handle, select vibrating motor can inform infusion patient in time to know the condition through the vibration in the very first time, and as shown in FIG. 2, adopts pilot lamp LED1 can be convenient for medical staff and patient in the first time observation to know transfer line liquid state, is convenient for in time handle.
Specifically, in the above embodiment, the voltage adjusting module includes a second adjustable resistor VR2, where an input end of the second adjustable resistor VR2 is connected to the power supply end VCC, an output end of the second adjustable resistor VR2 is connected to the ground end GND, and an adjusting end of the second adjustable resistor VR2 is connected to the first voltage comparing and the second input end of the signal output unit and the first input end of the second voltage comparing and signal output unit, respectively.
In this embodiment, the second adjustable resistor VR2 is used to implement the function of reference voltage adjustment, two ends of the second adjustable resistor VR2 are respectively connected to the power supply end VCC and the ground end GND, the second adjustable resistor VR2 receives the input voltage of the power supply end VCC, the position of the adjusting end is changed to output the reference voltage to the two voltage comparing and signal outputting units in the voltage comparing and signal outputting module, the value of the reference voltage is specifically set according to the use condition of the infusion tube and the model specification of the photoelectric sensor Q1, specifically, the reference voltage is located between the detection voltage output by the receiving diode when there is air bubble in the infusion tube and the detection voltage output by the receiving diode when there is no air bubble in the infusion tube, wherein the detection voltage when there is no air bubble in the infusion tube is greater than the reference voltage, and meanwhile the reference voltage is greater than the detection voltage when there is air bubble in the infusion tube, and the reference voltage can be used to easily distinguish and judge the detection voltage values in two different states, thereby accurately obtaining the judgment result of whether there is air bubble in the infusion tube.
Specifically, as shown in fig. 2, in the present application, the first adjustable resistor VR1 and the second adjustable resistor VR2 are implemented by using slide varistors, but the implementation forms of the adjustable resistors are numerous, and the present application is not limited in particular, and other components capable of changing the resistance value, such as a variable resistor, a digital potentiometer, and the like, may be used.
Specifically, in the above embodiment, the bubble detection circuit in the infusion tube further includes an output interface, where the output interface includes a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, and a fifth output terminal, where the first output terminal is connected to the power supply terminal VCC, the second output terminal is connected to the adjusting terminal of the voltage adjusting module, for receiving and outputting the reference voltage, the third output terminal is connected to the negative electrode of the receiving diode, for receiving and outputting the detection voltage, the fourth output terminal is connected to the output terminal of the voltage comparing and signal outputting module, for receiving the comparing result and outputting the comparing result in the form of a digital signal, and the fifth output terminal is connected to the ground terminal GND.
In this embodiment, an output port is provided for receiving each data index in the bubble detection circuit in the infusion tube, specifically, the output port has three functional output terminals, wherein the second output terminal is connected with the output end of the voltage regulation module, and the output end of the voltage regulation module outputs a reference voltage through the second output terminal, so that a medical staff can adjust the state of the voltage regulation module at any time according to the reference voltage value output by the second output terminal; the third output terminal is connected with the output end of the photoelectric sensor Q1, the photoelectric sensor Q1 outputs the detected voltage through the third output terminal, and the third output terminal is generally applied to a preparation stage before detection, so that the resistance value of the first adjustable resistor VR1 can be conveniently adjusted and the reference voltage can be set by acquiring the voltages in two states of whether bubbles exist in the infusion tube or not; the fourth output terminal is connected with the output end of the power supply comparison module, and the voltage comparison result output by the power supply comparison module is output through the fourth output terminal in the form of a digital signal, so that medical staff can know the existence state of bubbles in the infusion tube by acquiring the digital signal. The output port typically further includes a first output terminal connected to the power supply terminal VCC and a fifth output terminal connected to the ground terminal GND.
Specifically, in the above-described embodiment, the photosensor Q1 is the transmissive photosensor Q1.
The transmission type photoelectric sensor Q1 is a commonly used photoelectric sensor Q1, is used for detecting the existence or position of an object, has higher sensitivity and stability, can be used in different environments, and is commonly used in an automatic control system for detecting the arrival, the passing or the departure of the object.
In this embodiment, it is necessary to determine whether there is a bubble in the liquid in the infusion tube, so the light emitted by the emitting diode in the photoelectric sensor Q1 needs to pass through the infusion tube to reach the receiving diode, and therefore the infusion tube needs to be disposed between the emitting diode and the receiving diode, and therefore the photoelectric sensor Q1 needs to select the transmissive photoelectric sensor Q1, that is, the emitting diode and the receiving diode belong to two different sensor units, so as to achieve the effect of accurately monitoring the infusion tube.
The process of detecting bubbles in liquid in the infusion tube by utilizing the bubble detection circuit in the infusion tube provided by the application is as follows:
firstly, according to the specifications corresponding to the infusion tube and the photoelectric sensor Q1, the resistance value of the first adjustable resistor VR1 and the resistance value of the second adjustable resistor VR2 are adjusted, specifically, before the actual detection process of bubbles in the infusion tube is carried out, a circuit is required to be tested in advance, namely, the voltage values output by the receiving diode in the photoelectric sensor Q1 in two states of bubbles in liquid in the infusion tube and no bubbles are obtained, the difference between the voltage values in the two states is larger than a preset value by adjusting the resistance value of the first adjustable resistor VR1, and then the reference voltage is set by adjusting the resistance value of the second adjustable resistor VR2, so that the reference voltage is located between the voltage values output by the receiving diode in two different states, and the resistance values of the first adjustable resistor VR1 and the second adjustable resistor VR2 are determined.
Secondly, the infusion tube to be detected is detected, the infusion tube is placed between the emitting diode and the receiving diode of the photoelectric sensor Q1, liquid in the infusion tube normally flows, and medical staff judges whether bubbles exist in the infusion tube or not through the on-off state of the indicator light LED1 and the voltage comparison result output by the voltage comparison and signal output module.
Under the condition, when no bubble exists in the liquid in the infusion tube, the detection voltage output by the receiving diode of the photoelectric sensor Q1 is larger than the reference voltage, the first comparator U1 outputs a low level, the second comparator U2 outputs a high level, the indicator light LED1 does not work, the indicator light LED1 is turned off, medical staff judges that no bubble exists in the infusion tube through the indicator light LED1 and the first comparator U1 outputs a low level, and no further action is needed.
Under another condition, when bubbles exist in liquid in the infusion tube, the reference voltage is larger than the detection voltage output by the receiving diode of the photoelectric sensor Q1, then the first comparator U1 outputs a high level, and meanwhile the second comparator U2 outputs a low level, so that the indicator light LED1 works, the indicator light LED1 is turned on, medical staff judges that bubbles exist in the infusion tube through the turning on of the indicator light LED1 and the high level output of the first comparator U1, and the bubbles in the infusion tube need to be removed by taking action in time.
Another aspect of the present utility model provides a device for detecting bubbles in an infusion tube, comprising: the bubble detection circuit in the infusion tube and the result display device according to any one of the above, wherein the bubble detection circuit in the infusion tube is connected with the result device, and the result display device is used for displaying the detection result of the liquid state in the infusion tube.
The device for detecting the air bubbles in the infusion tube is provided with the result display device, and the result display device is connected with the output end of the air bubble detection circuit in the infusion tube and is used for acquiring the digital signals output by the voltage comparison and signal output module at the first time, so that medical staff can acquire accurate detection results at the first time.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. An in-tube bubble detection circuit for detecting whether there is a bubble in a liquid in an infusion tube, comprising: the photoelectric sensor, the voltage regulating module and the voltage comparison and signal output module are used for detecting the voltage of the power supply;
the infusion tube passes through the photoelectric sensor and is arranged between a transmitting diode and a receiving diode of the photoelectric sensor;
the positive electrode of the emitting diode is connected with the power supply end, the negative electrode of the emitting diode is connected with the grounding end, the positive electrode of the receiving diode is connected with the power supply end, the negative electrode of the receiving diode is respectively connected with the grounding end and the first input end of the voltage comparison and signal output module, and the photoelectric sensor outputs detection voltage corresponding to the liquid state according to the liquid state in the infusion tube and transmits the detection voltage to the voltage comparison and signal output module, wherein the liquid state comprises bubbles in the liquid and no bubbles in the liquid;
the input end of the voltage regulating module is connected with the power supply end, the output end of the voltage regulating module is connected with the grounding end, the regulating end of the voltage regulating module is connected with the second input end of the voltage comparing and signal outputting module, and the voltage regulating module is used for regulating the input voltage of the power supply end into the reference voltage and outputting the reference voltage to the voltage comparing and signal outputting module;
the voltage comparison and signal output module is used for comparing the detection voltage with the reference voltage to obtain a comparison result, outputting the comparison result in a digital signal form, and displaying the liquid state in the infusion tube corresponding to the comparison result.
2. The in-tube bubble detection circuit of claim 1, further comprising a first adjustable resistor and a first resistor;
the input end of the first adjustable resistor is connected with the power supply end, the output end of the first adjustable resistor is connected with the positive electrode of the emitting diode, and the adjusting end of the first adjustable resistor is connected with the positive electrode of the emitting diode;
and the cathode of the receiving diode is connected with the grounding end through the first resistor.
3. The in-tube bubble detection circuit according to claim 1, wherein the voltage comparison and signal output module includes a first voltage comparison and signal output unit and a second voltage comparison and signal output unit;
the negative electrode of the receiving diode is connected with the first input end of the first voltage comparison and signal output unit, the regulating end of the voltage regulating module is connected with the second input end of the first voltage comparison and signal output unit, and the output end of the first voltage comparison and signal output unit is connected with the power supply end;
the negative electrode of the receiving diode is connected with the second input end of the second voltage comparison and signal output unit, the regulating end of the voltage regulating module is connected with the first input end of the second voltage comparison and signal output unit, and the output end of the second voltage comparison and signal output unit is connected with the power supply end.
4. The bubble detection circuit according to claim 3, wherein the first voltage comparing and signal outputting unit comprises a first comparator and a second resistor;
the negative electrode of the first comparator is connected with the negative electrode of the receiving diode, the positive electrode of the first comparator is connected with the regulating end of the voltage regulating module, the positive electrode of the power supply of the first comparator is connected with the power supply end, and the negative electrode of the power supply of the first comparator is connected with the grounding end;
the second resistor is connected between a power supply end and an output end of the first comparator.
5. The bubble detection circuit according to claim 3, wherein the second voltage comparing and signal outputting unit comprises a second comparator, a third resistor and an alarm;
the positive electrode of the second comparator is connected with the negative electrode of the receiving diode, the negative electrode of the second comparator is connected with the regulating end of the voltage regulating module, the positive electrode of the power supply of the second comparator is connected with the power supply end, and the negative electrode of the power supply of the second comparator is connected with the grounding end;
the input end of the alarm is connected with the power end through the third resistor, and the output end of the alarm is connected with the output end of the second comparator.
6. The circuit of claim 5, wherein the alarm is at least one of a buzzer, an indicator light, and a vibration motor.
7. The in-tube bubble detection circuit of claim 3, wherein the voltage adjustment module comprises a second adjustable resistor;
the input end of the second adjustable resistor is connected with the power supply end, the output end of the second adjustable resistor is connected with the grounding end, and the adjusting end of the second adjustable resistor is respectively connected with the second input end of the first voltage comparison and signal output unit and the first input end of the second voltage comparison and signal output unit.
8. The in-tube bubble detection circuit of claim 1, further comprising an output interface comprising a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, and a fifth output terminal;
the first output terminal is connected with a power supply end;
the second output terminal is connected with the regulating end of the voltage regulating module and is used for receiving and outputting the reference voltage;
the third output terminal is connected with the negative electrode of the receiving diode and is used for receiving and outputting the detection voltage;
the fourth output terminal is connected with the output end of the voltage comparison and signal output module and is used for receiving the comparison result and outputting the comparison result in a digital signal form;
the fifth output terminal is connected with the ground terminal.
9. The circuitry for detecting air bubbles in an infusion tube according to claim 1, wherein the photosensor is a transmissive photosensor.
10. An in-tube bubble detection device, comprising: an in-tube bubble detection circuit and result display device as claimed in any one of claims 1 to 9;
the bubble detection circuit in the infusion tube is connected with the result device, and the result display device is used for displaying the detection result of the liquid state in the infusion tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321994584.XU CN220778795U (en) | 2023-07-27 | 2023-07-27 | Bubble detection circuit and device in infusion tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321994584.XU CN220778795U (en) | 2023-07-27 | 2023-07-27 | Bubble detection circuit and device in infusion tube |
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| CN220778795U true CN220778795U (en) | 2024-04-16 |
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| CN202321994584.XU Active CN220778795U (en) | 2023-07-27 | 2023-07-27 | Bubble detection circuit and device in infusion tube |
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| CN (1) | CN220778795U (en) |
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