A single-chip microcomputer-based medicine quantitative injection pen and an injection control system thereof

Abstract

The utility model discloses a medicine quantitative injection pen based on singlechip and injection control system thereof, and the injection pen includes singlechip, injection cylinder, plunger, the push assembly for driving plunger movement and injects the injection needle head of patient skin, and the push assembly includes step motor, is used for controlling the harmonic reducer of step motor output angular displacement amount and is used for controlling the screw micrometer bar of plunger telescoping in injection cylinder, and singlechip controls medicine dose, and is electrically connected with step motor, and step motor is controlled, and one end of screw micrometer bar is fixedly connected with plunger, and the other end is connected in harmonic reducer, and harmonic reducer is connected with step motor, and screw micrometer bar is built -in and is used for measuring the distance sensor of screw micrometer bar movement amount, and singlechip is electrically connected with distance sensor, and the discharge capacity of medicine is calculated according to the detection signal of distance sensor.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically a microcontroller-based drug dispensing pen and control system. Background Technology

[0002] Traditional drug synthesis and injection processes present numerous challenges. For patients with chronic diseases requiring long-term, quantitative injections (such as diabetic patients) and specific populations needing precise medication (such as cancer patients), traditional methods cannot meet their needs for accurate drug dosage control. The lack of precise dosage control methods can lead to insufficient or excessive drug dosages, affecting treatment efficacy and even harming the patient's health. Utility Model Content

[0003] The purpose of this invention is to provide a microcontroller-based drug dispensing pen to solve the problems mentioned in the background section.

[0004] To achieve the above objectives, one of the technical solutions provided by this utility model is: a microcontroller-based drug dispensing pen, comprising a microcontroller, an injection cylinder containing injection solution, a plunger disposed within the injection cylinder, a pushing component for moving the plunger, and an injection needle for injection into the patient's skin. The pushing component includes a stepper motor, a harmonic reducer for controlling the angular displacement of the stepper motor output, and a micrometer spiral rod for controlling the extension and retraction of the plunger within the injection cylinder. The microcontroller controls the drug dosage and is electrically connected to the stepper motor to control the stepper motor. One end of the micrometer spiral rod is fixedly connected to the plunger, and the other end is connected to the harmonic reducer. The harmonic reducer is connected to the stepper motor. The micrometer spiral rod has a built-in distance sensor for measuring the movement of the micrometer spiral rod. The microcontroller is electrically connected to the distance sensor and calculates the amount of drug dispensed based on the detection signal from the distance sensor.

[0005] Furthermore, a pressure sensor for detecting the injection status is provided inside the syringe.

[0006] Furthermore, the microcontroller controls the speed and rotation angle of the stepper motor by sending pulse signals of different frequencies and quantities, and controls the rotation direction of the stepper motor by sending direction control signals.

[0007] Furthermore, the micrometer rod converts rotational motion into linear motion through its own helical transmission structure, thereby driving the plunger to move up and down.

[0008] Furthermore, the injection cylinder is surrounded by a phase change material layer.

[0009] Furthermore, the injection pen is equipped with a display module, which is electrically connected to a microcontroller.

[0010] Furthermore, the microcontroller integrates a timing module and an alarm module.

[0011] The second technical solution provided by this utility model is: a drug quantitative injection control system, the control system including an input module and the above-mentioned drug quantitative injection pen based on a single-chip microcomputer, the input module being electrically connected to the single-chip microcomputer and used to input drug injection volume setting control commands to the single-chip microcomputer.

[0012] Furthermore, the microcontroller is connected to the mobile terminal via a wireless transmission module.

[0013] Compared with the prior art, the beneficial effects of this utility model are: by controlling the stepper motor with a microcontroller, combined with the harmonic reducer and the micrometer screw, as well as the feedback from the distance sensor and the pressure sensor, the precise control of drug dosage can be achieved, reducing dosage error, improving treatment effect, and ensuring that patients can take the medicine on time and in the correct amount, thereby improving the treatment effect and quality of life for patients. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the microcontroller-based drug dispensing pen of this utility model.

[0015] Figure 2 This is a schematic diagram of the propulsion component structure in the microcontroller-based drug dispensing pen of this utility model;

[0016] Figure 3 This is a block diagram of the drug quantitative injection control system of this utility model;

[0017] In the diagram, 100-input module, 200-display module, 300-timing module, 400-alarm module, 1-microcontroller, 2-injection cylinder, 3-plunger, 41-stepper motor, 42-harmonic reducer, 43-micrometer screw, 44-distance sensor, 45-pressure sensor, and 5-injection needle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1-3As shown, this embodiment provides a drug quantitative injection control system. The control system includes an input module 100 and an injection pen. The injection pen is a drug quantitative injection pen based on a microcontroller control, including a microcontroller 1, an injection cylinder 2 containing the injection solution, a plunger 3 disposed within the injection cylinder 2, a pushing component for moving the plunger 3, and an injection needle 5 for injecting into the patient's skin. The injection cylinder 2 is surrounded by a phase change material layer, such as a paraffin-based phase change material layer, which absorbs / releases heat when the external temperature fluctuates, maintaining drug activity. The pushing component includes a stepper motor 41, a harmonic reducer 42 for controlling the output angular displacement of the stepper motor 41, and a screw for controlling the extension and retraction of the plunger 3 within the injection cylinder 2. In this embodiment, the microcontroller 1, serving as the core control unit of the entire drug quantitative injection system, is an STM32 microcontroller used to receive input signals, process data, and issue control commands. For example, it receives the required drug dosage input from the input module 100 to control the dosage injected into the patient's skin by the injection pen. It is also electrically connected to the stepper motor 41 to control the stepper motor 41. By sending pulse signals of different frequencies and quantities, it controls the rotation speed and angle of the stepper motor 41. It also controls the rotation direction of the stepper motor 41 by sending direction control signals. The stepper motor 41 is a 20 linear lead screw stepper motor, and the harmonic reducer 42 is a CSF series. One end of the micrometer rod 43 is fixedly connected to the plunger 3, and the other end is connected to the harmonic reducer 42. Through its own helical transmission structure, it converts rotational motion into linear motion, driving the plunger to move up and down. The harmonic reducer 42 is connected to the stepper motor 41. Through deceleration and torque amplification, it converts the rotation of the stepper motor 41 into a more precise angular displacement output, providing a stable power input for the micrometer rod 43. This allows the micrometer rod 43 to precisely control the distance the plunger moves up and down, thereby achieving precise control of the drug injection and output volume. The micrometer rod 43 has a built-in distance sensor 44 for measuring the movement of the micrometer rod 42. The distance sensor 44 is electrically connected to the microcontroller 1. The distance sensor 44 can clearly record the specific movement of the micrometer rod 43 and feed the recorded information back to the microcontroller 1. The microcontroller 1 calculates the amount of drug discharged based on the recorded information. The syringe 2 is equipped with a pressure sensor 45 for detecting the injection status. The pressure sensor 45 is located near the injection needle 5. The pressure sensor 45 is an MPXV7002 pressure sensor that can detect pressure fluctuations inside the syringe 2. During the injection process, the discharge of liquid will cause changes in the pressure inside the syringe. By tracking these pressure changes, the injection status can be indirectly evaluated, which helps to determine whether the injection process is smooth and whether there are potential blockages or leaks.

[0020] The input module 100 can be either keyboard input or voice input. It converts analog signals to digital signals using an A / D converter chip HX711 to precisely control the drug dosage. Patients can control the injection via keyboard or voice commands and can also set parameters such as drug type, quantity, and administration time. The injection pen is equipped with a display module 200. The microcontroller 1 integrates a timing module 300 and an alarm module 400. The timing module 300 can use a DS1302 clock chip, providing precise date, time, minute, second, and day of the week information. The alarm module 400 can... Using LED lights and buzzers, users can set the injection time for the medication. When the set time arrives, the system will remind the user to inject the medication through methods such as flashing the LCD screen and sounding the buzzer. The sound and light alarm enhances the reminder effect. When the user finishes injection, the system can automatically cancel the alarm and reminder. The display module 200 can use an LED1602 LCD screen to display the current time, medication information, medication reminders, etc. It is also equipped with a power module to provide a stable power supply for the entire system and ensures that the system can be safely shut down in abnormal situations through voltage monitoring and protection circuits.

[0021] The microcontroller 1 connects to the mobile terminal via a wireless transmission module, such as Bluetooth or Wi-Fi. Users can remotely view medication information and set medication reminders through a mobile app. The app also provides vibration alerts and voice announcements to ensure users don't miss any important medication reminders. Through smartphones or tablets, users can remotely monitor and control the medication administration process, view the real-time status and parameters, and create a database to store time settings, medication quantities, timing intervals, and user data. This ensures data is preserved in the database even after a power outage, eliminating the need for resetting. The database storage function can also be used to record user medication history and analyze medication habits.

[0022] In operation, this invention first programs an STM32 microcontroller to process signals from various modules and make decisions based on preset program logic. Through microcontroller control, it can precisely control the injection volume of medication according to user instructions, ensuring accurate dosage each time. Medication injection is performed automatically according to the preset program, reducing errors and inconvenience caused by manual operation. Real-time monitoring of key parameters such as remaining medication and injection speed ensures the safety and effectiveness of the injection process. It also features a function to record real-time medication usage. Through an LED1602 LCD screen, users can clearly and conveniently obtain information such as current medication quantity, usage status, administration time, and medication information. Based on this, and according to a database, the system can update the medication quantity, usage status, administration time, and medication information in real time.

[0023] This invention uses a microcontroller to control a stepper motor, combined with a harmonic reducer, a micrometer screw, and feedback from distance and pressure sensors, to achieve precise control of drug dosage, reduce dosage errors, improve treatment efficacy, and ensure that patients can take medication on time and in the correct dosage, thereby improving treatment outcomes and quality of life.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A microcontroller-based drug dispensing pen, comprising a microcontroller, a syringe containing an injection solution, a plunger disposed within the syringe, a pushing component for moving the plunger, and an injection needle for injection into the patient's skin, characterized in that: The pushing assembly includes a stepper motor, a harmonic reducer for controlling the angular displacement of the stepper motor output, and a micrometer rod for controlling the extension and retraction of the plunger within the syringe barrel. The microcontroller controls the drug dosage and is electrically connected to the stepper motor to control it. One end of the micrometer rod is fixedly connected to the plunger, and the other end is connected to the harmonic reducer, which is connected to the stepper motor. The micrometer rod has a built-in distance sensor for measuring the movement of the micrometer rod. The microcontroller is electrically connected to the distance sensor and calculates the amount of drug dispensed based on the detection signal from the distance sensor.

2. The microcontroller-based drug dispensing pen according to claim 1, characterized in that: The syringe is equipped with a pressure sensor for detecting the injection status.

3. The microcontroller-based drug dispensing pen according to claim 1, characterized in that: The microcontroller controls the speed and rotation angle of the stepper motor by sending pulse signals of different frequencies and quantities, and controls the rotation direction of the stepper motor by sending direction control signals.

4. The microcontroller-based drug dispensing pen according to claim 1, characterized in that: The micrometer rod converts rotational motion into linear motion through its own helical transmission structure, thereby driving the plunger to move up and down.

5. The microcontroller-based drug dispensing pen according to claim 1, characterized in that: The syringe is surrounded by a phase change material layer.

6. The drug dispensing pen based on a single-chip microcomputer according to claim 1, characterized in that: The injection pen is equipped with a display module, which is electrically connected to a microcontroller.

7. The microcontroller-based drug dispensing pen according to claim 1, characterized in that: The microcontroller integrates a timing module and an alarm module.

8. An injection control system, characterized in that: The control system includes an input module and a microcontroller-based drug quantitative injection pen as described in any one of claims 1 to 7. The input module is electrically connected to the microcontroller and is used to input drug injection volume setting control commands to the microcontroller.

9. The injection control system according to claim 8, characterized in that: The microcontroller is connected to the mobile terminal via a wireless transmission module.

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