Intelligent infusion device based on ultrasonic microfluid dynamics

Abstract

The invention discloses an intelligent infusion device based on ultrasonic microfluid dynamics. Comprising a base, an ultrasonic transducer, a constant-temperature container, an infusion bottle and the like, the ultrasonic transducer is arranged in the base and comprises a battery, a gasket, two electrodes, two piezoelectric patches and a transducer, and ultrasonic waves generated by vibration of an ultrasonic vibration excitation unit are used for driving infusion liquid to flow; a control switch which is connected with the two electrodes and can be opened and closed and a driving circuit are arranged on the base shell; the constant-temperature container is connected with the base, an infrared sensor and an alarm are arranged at a groove in the bottom of the container, the infusion tube is connected into the infusion container, when liquid reaches the bottom of the container and is lower than the infrared sensor, the alarm is triggered, at the moment, output of an ultrasonic transducer driving circuit at the bottom is reduced, vibration of the transducer is reduced, and the liquid flow speed is decreased. And medicine changing can be waited or infusion is finished.

Description

Technical Field

[0001] The present invention relates to an intelligent infusion device based on ultrasonic microfluidics dynamics. Background Art

[0002] Traditional infusion devices (such as gravity infusion sets, mechanical pumps, etc.) are widely used in medical, laboratory, and industrial fields. However, they rely on gravity or mechanical power to drive the liquid flow, and have the following limitations: Insufficient precision: The flow rate of gravity infusion is affected by factors such as the liquid level height and catheter resistance, making it difficult to achieve precise control of trace amounts of liquid medicine. Although mechanical pumps can adjust the flow rate, they have complex structures, large volumes, and there is a risk of mechanical wear during long-term use. Difficulty in portability and miniaturization: Traditional pump bodies rely on external power sources or mechanical components, making it difficult to integrate them into wearable devices or implantable medical devices. Biocompatibility and infection risk: The contact components of mechanical pumps may cause liquid contamination, especially in long-term infusion scenarios, the risk is relatively high. In recent years, the development of microfluidic technology has provided new ideas for miniaturized infusion, such as using capillary action to drive the liquid to flow in microchannels. Capillary action relies on the surface tension of the liquid and can achieve self-driving without external power. However, its flow rate is limited by factors such as the channel material and liquid properties, and it cannot be dynamically regulated, making it difficult to meet the requirements of complex scenarios. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to provide an intelligent infusion device based on ultrasonic microfluidics dynamics that has a simple structure, low cost, and can achieve self-driving without external power.

[0004] Technical Solution of the Invention: An intelligent infusion device based on ultrasonic microfluidics dynamics according to the present invention includes a constant temperature container, and an ultrasonic transducer is installed on one side of the constant temperature container.

[0005] Further, the ultrasonic transducer includes a transducer, piezoelectric sheet two, piezoelectric sheet one, gasket, and battery.

[0006] Further, it also includes electrode two and electrode one, and a control switch and a driving circuit are connected to the electrode two and electrode one.

[0007] Further, a base is installed on the periphery of the ultrasonic transducer.

[0008] Further, an infusion bottle is installed inside the constant temperature container, and an infusion tube is installed in the infusion bottle.

[0009] Further, an infrared sensor and an alarm are installed at the bottom side groove of the constant temperature container.

[0010] Further, the constant temperature container is a concave container, and a heating resistor is installed inside it.

[0011] Furthermore, the capacity of the constant temperature container is 0.5 - 1.5 liters.

[0012] Furthermore, the power of the ultrasonic transducer is determined according to the required efficiency and energy consumption.

[0013] Furthermore, the operating frequency f of the ultrasonic transducer is continuously adjustable within 20 - 200 kHz.

[0014] The beneficial effects of the present invention are as follows: 1. It has the advantages of simple structure, low cost, low energy consumption, and no risk of mechanical wear caused by long-term use; 2. It does not rely on gravity or mechanical power to drive the liquid flow, but uses the capillary effect to drive the liquid to flow in the microchannel; the capillary effect depends on the liquid surface tension and can achieve self-driving without external power; 3. Without a traditional pump body relying on an external power source or mechanical components, it can be integrated into wearable devices or implantable medical devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of the present invention;

[0016] Figure 2 is the partial structural schematic diagram of the present invention;

[0017] Figure 3 is the flowchart of the ultrasonic system of the present invention;

[0018] In the figure: 100 is the base, 101 is the control switch and drive circuit;

[0019] 200 is the ultrasonic transducer, 201 is the battery, 202 is the gasket, 203 is the first electrode, 204 is the first piezoelectric sheet, 205 is the second electrode, 206 is the second piezoelectric sheet, 207 is the transducer;

[0020] 300 is the constant temperature container, 301 is the alarm, 302 is the infrared sensor;

[0021] 400 is the infusion bottle, 401 is the infusion tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further elaborates on the specific technical solutions of the present invention with reference to specific examples.

[0023] As shown in the figure, an intelligent infusion device based on ultrasonic microfluidics according to the present invention is a detachable and modular infusion device, including a base 100, an ultrasonic transducer 200, a constant temperature container 300, and an infusion bottle 400;

[0024] The ultrasonic transducer 200 is built into the base 100 and uses the ultrasonic waves generated by the vibration of the ultrasonic excitation unit to drive the liquid flow of the infusion liquid;

[0025] The constant temperature container 300 is connected to the base 100, and an infrared sensor 302 is installed at the groove at the bottom of the container of the constant temperature container 300, and an alarm 301 is also installed outside the container of the constant temperature container 300; the infusion tube 401 is connected to the inside of the infusion container (infusion bottle 400). When the liquid reaches below the infrared sensor 302 at the bottom of the container, the alarm 301 is triggered. At this time, the output of the gasket at the bottom decreases, the vibration of the transducer decreases, and the liquid flow rate drops, and then it is possible to wait for a dressing change / end of infusion;

[0026] Specifically, when the infusion tube 401 is not placed inside the infusion container (infusion bottle 400), the ultrasonic transducer 200 drives the liquid to vibrate to mix the infusion liquid. When the infusion tube 401 is placed inside the infusion bottle 400, a capillary effect will be generated to make the infusion liquid flow out through the infusion tube 401.

[0027] An ultrasonic transducer 200 is installed inside the base 100. The ultrasonic wave generated by the ultrasonic excitation unit is used to drive the liquid flow of the infusion liquid, and the infusion liquid is discharged upward along the infusion tube 401 through the ultrasonic capillary effect.

[0028] The ultrasonic transducer 200 includes a battery 201, a gasket 202, an electrode 1 203, a piezoelectric sheet 1 204, an electrode 2 205, a piezoelectric sheet 2 206 and a transducer 207; the battery 201 and the gasket 202 send an electrical signal to a power amplifier (Aigtek ATA-4052) through a signal generator (Tektronix AFG 3022C, 250MS / s, 25MHz) for power amplification of the electrical signal to drive the piezoelectric sheet 1 204 and the piezoelectric sheet 2 206.

[0029] The electrode 1 203 and the electrode 2 205 are sandwiched between the two piezoelectric sheets, and two wires are used at the electrodes to connect to the control switch and the drive circuit 101;

[0030] A control switch and a drive circuit 101 are installed on the outer shell of the base 100. Part or all of the control switch and the drive circuit 101 can be installed in the holes opened in the base 100; it can control the opening and closing of the drive circuit.

[0031] The constant temperature container 300 is a concave container, and its interior contains a heating resistor, which can keep the infusion liquid at about room temperature of 25°C; the capacity of the constant temperature container 300 is 0.5 - 1.5 liters;

[0032] The constant temperature container 300 is made of an acrylic plate material with a height of 60 mm, a radius of 40 mm and a thickness of 5 mm to form a cylindrical groove, and a heating copper wire is provided inside it to keep the internal infusion liquid at room temperature.

[0033] The power of the ultrasonic transducer 200 is determined according to the required efficiency and energy consumption;

[0034] The operating frequency f of the ultrasonic transducer 200 is continuously adjustable in the range of 20 - 200 kHz.

[0035] The base 100 is made of resin material.

[0036] The ultrasonic excitation unit includes, but is not limited to, devices such as ultrasonic transducers, ceramic piezoelectric wafers, interdigital electrodes, etc. that can excite ultrasonic waves.

[0037] The diameters of the first piezoelectric wafer 204 and the second piezoelectric wafer 206 are 30 mm, the thickness is 3 mm, the operating frequency is f = 113.49 kHz, the effective value of the operating voltage is 7.79 V, and the effective value of the operating current is 325 mA.

[0038] The base 100 is a cylindrical groove made of an acrylic plate material with a height of 58 mm, a radius of 40 mm, and a thickness of 15 mm.

[0039] The development of this device in microfluidic technology provides new ideas for miniaturized infusion. For example, the capillary effect can be used to drive the flow of liquid in microchannels; the capillary effect depends on the surface tension of the liquid and can achieve self - driving without external power. However, its flow rate is limited by factors such as the channel material and the properties of the liquid, and it cannot be dynamically regulated, making it difficult to meet the requirements of complex scenarios; the introduction of ultrasonic technology makes it possible to actively regulate capillary flow.

Claims

1. An intelligent infusion device based on ultrasonic microfluidics, characterized in that: The invention comprises a constant temperature container (300), and an ultrasonic transducer (200) is installed on one side of the constant temperature container (300).

2. The intelligent infusion device based on ultrasonic microfluidics according to claim 1, characterized in that: The ultrasonic transducer (200) includes a transducer (207), a second piezoelectric sheet (206), a first piezoelectric sheet (204), a gasket (202) and a battery (201).

3. The intelligent infusion device based on ultrasonic microfluidics according to claim 2, wherein: It also includes a second electrode (205) and an electrode (203), and the second electrode (205) and the electrode (203) are connected to a control switch and a driving circuit (101).

4. The intelligent infusion device based on ultrasonic microfluidics according to claim 1, characterized in that: A base (100) is installed on the periphery of the ultrasonic transducer (200).

5. The intelligent infusion device based on ultrasonic microfluidics according to claim 2, characterized in that: An infusion bottle (400) is installed inside the constant temperature container (300), and an infusion tube (401) is installed in the infusion bottle (400).

6. The intelligent infusion device based on ultrasonic microfluidics according to claim 1, wherein: An infrared sensor (302) and an alarm (301) are installed at the bottom side groove of the constant temperature container (300).

7. The intelligent infusion device based on ultrasonic microfluidics according to claim 1, wherein: The constant temperature container (300) is a concave container, and a heating resistor is installed inside the container.

8. The intelligent infusion device based on ultrasonic microfluidics according to claim 1, characterized in that: The capacity of the constant temperature container (300) is 0.5-1.5 liters.

9. The intelligent infusion device based on ultrasonic microfluidics according to claim 1, characterized in that: The power of the ultrasonic transducer (200) is determined according to the required efficiency and energy consumption.

10. The intelligent infusion device based on ultrasonic microfluidics according to claim 8, characterized in that: The operating frequency f of the ultrasonic transducer (200) is continuously adjustable within the range of 20-200 kHz.

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