CN211561368U

CN211561368U - Intravenous injection pump

Info

Publication number: CN211561368U
Application number: CN201921068313.5U
Authority: CN
Inventors: 文婷
Original assignee: Fudan University Shanghai Cancer Center
Current assignee: Fudan University Shanghai Cancer Center
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-09-25
Anticipated expiration: 2029-07-09

Abstract

The utility model provides a pair of intravenous route pump, include: ARM treater, power supply circuit, motor drive circuit, sensing detection circuitry and transmission are applicable to 10ml syringe and 20ml syringe, can realize the accurate control of infusion speed, have the warning of blocking, drop alarming function, and small in size can wide application in clinical care work, lets the nurse work that can be more efficient, alleviates the patient discomfort, rehabilitation that can be faster.

Description

Intravenous injection pump

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to intravenous route pump.

Background

The intravenous injection pump is an instrument capable of injecting a trace amount of liquid medicine into a patient body uniformly and accurately for a long time so as to achieve the optimal treatment effect, and is mainly used for intravenous infusion, nutrition tube feeding, anti-shock treatment, antibiotic intake, anesthetic injection and micro-injection of other special valuable medicines. While avoiding human error and uncertainty, medical infusion pumps have been extended from use with special patients to use with general patients.

The vein push pump adopted clinically in China at present can be used for injectors with the specifications of 10ml, 20ml, 50ml and the like, and has larger volume and higher cost. In some small-dose injection scenes, each patient has 1-5 times of intravenous bolus injection medicines every day, the speed of bolus injection is difficult to control, and the existing intravenous bolus pump cannot meet the current requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an intravenous route pump to solve the above-mentioned problem that exists among the prior art.

In order to achieve the above object, a specific solution of the present invention is to provide an intravenous pump, comprising: the system comprises an ARM processor, a power circuit, a motor driving circuit, a sensing detection circuit and a transmission device;

the power supply circuit comprises an alternating current-direct current conversion circuit and a battery management circuit, the alternating current-direct current conversion circuit receives external power supply and is connected with the battery management circuit, the battery management circuit is connected with a lithium battery, and the battery management circuit is in electrical signal connection with the ARM processor;

the motor driving circuit is connected with the stepping motor and is in electrical signal connection with the ARM processor;

the transmission device comprises a speed reducer, a lead screw and a fixed support, wherein a stepping motor is installed on one side of the fixed support, the lead screw penetrates through the fixed support and is movably connected with a nut, a clamp is arranged on the nut, and the lead screw is movably connected with the stepping motor through the speed reducer;

the sensing detection circuit comprises a photoelectric detection switch and a pressure sensor, the photoelectric detection switch is installed on the fixed support and is in electrical signal connection with the ARM processor, and the pressure sensor is installed on the nut and is in electrical signal connection with the ARM processor.

Preferably, the fixed support is provided with two groups of U-shaped grooves for accommodating syringe baffles of 10ml and 20ml specifications.

Preferably, the photoelectric detection switch is installed in the U-shaped groove.

Preferably, the ARM processor adopts an STM8S003F3ARM processor.

Preferably, the alternating current-direct current conversion circuit adopts an LH25-10B15 power supply chip, and the battery management circuit adopts a BQ3060 chip.

Preferably, the motor driving circuit adopts TB622092FG driving chips.

Preferably, the system also comprises a liquid crystal display screen, and the liquid crystal display screen is connected with the ARM processor bus.

Preferably, the injection device further comprises an input key, wherein the input key is in electric signal connection with an ARM processor bus, and the input keys are 4 groups, so that the functions of injection start and stop, mode switching, parameter selection, buzzing mute and the like are realized.

Preferably, the stepping motor is connected with an encoder, and the encoder is in electrical signal connection with the ARM processor.

Preferably, the alarm device further comprises an alarm circuit, wherein the alarm circuit is in electric signal connection with the ARM processor and comprises a buzzer.

Compared with the prior art, the utility model, have following advantage and beneficial effect:

the utility model provides a pair of intravenous route pump, include: ARM treater, power supply circuit, motor drive circuit, sensing detection circuitry and transmission are applicable to 10ml syringe and 20ml syringe, can realize infusion speed and accurate control, but the wide application in clinical care work lets the nurse work that can be more efficient, alleviates the patient discomfort, can be faster recovered.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a system framework diagram of the present invention;

fig. 2 is a sectional view of the transmission device of the present invention.

Description of the main element symbols:

an ARM processor: 1 power supply circuit: 2, a motor driving circuit: 3, a stepping motor: 4

The transmission device comprises: 5, a sensing detection circuit: 6, encoder: 7LED display circuit: 8

An input circuit: 9 alarm circuit: 10

AC-DC conversion circuit: 21 battery management circuit: 22 voltage stabilizing circuit 23

Speed reducer: 51, leading screw: 52, nut: 53, clamping by using a clamp: 54, fixing a bracket: 55

A U-shaped groove: 56

A displacement sensor: 61 photoelectric detection switch: 62 pressure sensor: 63

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1 is a system framework diagram of an iv pump according to the present invention. As shown in figure 1, the utility model relates to an intravenous injection pump includes ARM treater 1, power supply circuit 2, motor drive circuit 3, sensing detection circuit 6, transmission 5, LED display circuit 8, warning circuit 10 and input circuit 9.

The ARM processor 1 is a control core of the whole system and mainly executes motor motion control, sensing signal detection, power supply switching and man-machine interaction operation. As preferred embodiment, the utility model discloses an ARM treater 1 adopts STM8S003F3 treater, adopts the 3.3VDC power supply, and outside 8MHZ crystal is as the system clock source, and the treater adopts TIMER, ADC, FSMC, GPIO, EXTI, UART, I2C, SMB, treater interfaces such as SWD, realize 4 drive control of step motor, sensor data acquisition, LCD show, button and encoder input detection, the syringe specification and the detection that drops, the syringe is markd, functions such as warning suggestion and lithium cell management.

The power supply circuit 2 adopts two power supply modes of an external 220V alternating current and a built-in lithium battery, and the two power supply modes can realize automatic switching: the external power supply preferentially supplies power, when the external power supply is used, the lithium battery is automatically charged, and when the external power is off, the lithium battery is automatically supplied with power. The power supply circuit 2 includes an ac/dc conversion circuit 21, a battery management circuit 22, and a voltage stabilizing circuit 23. The AC-DC conversion circuit 21 adopts an LH25-10B15 power chip to realize the conversion of 220VAC-15VDC, the input end of the AC-DC conversion circuit 21 is connected with the mains supply to receive the power supply of external 220V alternating current, and the output end of the AC-DC conversion circuit 21 is respectively connected with the battery management circuit 22 and the voltage stabilizing circuit 23. The battery management circuit 22 selects an MAX1758 switch-type chip to complete the switching of the power supply mode, the maximum charging current can reach 1.5A, the input voltage can reach 28V, and the battery management circuit has the functions of temperature monitoring and charging state indication; the management function of the lithium battery is realized by a BQ3060 chip, the functions of overvoltage, undervoltage, overcurrent and short-circuit protection are provided, an SMB bus is adopted for communicating with an MCU, and the MCU can inquire information such as charging state, real-time electric quantity, real-time voltage, real-time current and the like by sending a command; the voltage stabilizing circuit 23 provides stable 5V and 3.3V power supplies for the system by using LM2940IMP-5.0 and LM1117MPX-3.3 chips.

Motor drive circuit 3 chooses TB62209FG driver chip for use of Toshiba company, and this chip has integrateed a decoder of segmentation step pulse, adopts the accurate sinusoidal wave of segmentation to drive two-phase hybrid step motor 4, can reduce the oscillation, and built-in charge pump circuit and electric energy monitor circuit for the protection can set up chopping frequency through external resistance and electric capacity.

As shown in fig. 2, the transmission 5 includes a speed reducer 51, a lead screw 52, and a fixing bracket 55. The stepping motor 4 is arranged on one side of the fixed bracket 55, the stepping motor 4 is rotatably connected with the lead screw 52 through the speed reducer 51, the lead screw 52 penetrates through the fixed bracket 55 and is movably connected with the nut 53, the nut 53 is provided with a clamp 54, and the clamp 54 is used for being connected with a piston push rod of the injector. In order to detect the rotating speed of the lead screw 52, the stepping motor 4 is connected with an encoder 7, and the encoder 7 acquires the rotating speed of the stepping motor 4 and sends the rotating speed to the ARM processor 1.

The sensing circuit 6 includes a photodetection switch, a pressure sensor 63, and a displacement sensor 61. Photoelectric detection switches are used for detecting the specification of the injector and the falling of the injector, the photoelectric detection switches are arranged in the U-shaped grooves 56, and the U-shaped grooves 56 are divided into two groups and arranged on the fixed support 55 for accommodating the injector baffle. When the injector is in use, the injector shield blocks the photo switch, which photo switch 62 generates a signal for the ARM processor 1 to recognize. A pressure sensor 63 is mounted on the nut 53 to measure the pressure between the syringe plunger and the nut 53, and when the pressure is greater than a certain value, it is considered that an occlusion has occurred. The pressure sensor 63 adopts a resistance type pressure sensor 63 and is in electric signal connection with the ARM processor 1. The displacement sensor 61 is mounted on the lead screw 52 for detecting the push rod action of the injector, and the ARM processor 1 calculates the relative position of the push rod according to the collected voltage value.

The LED display circuit 8 adopts a 3.2-inch TFT-LCD liquid crystal display screen as a human-computer interaction interface, has 32 pins, is provided with an ILI9341 controller and a partner touch control chip XPT2046, and has the resolution of 320 x 240.

The input circuit 9 comprises 4 keys, the key functions are divided into short-time pressing and long-time pressing, the short-time pressing realizes injection start and stop, mode switching, parameter selection and buzzing mute, and the long-time pressing realizes injector calibration, quick injection and setting confirmation.

The alarm circuit 10 comprises a buzzer electrically connected with the ARM processor 1, the key functions are divided into short-time pressing and long-time pressing, the short-time pressing realizes injection start and stop, mode switching, parameter selection and buzzing mute, and the long-time pressing realizes injector calibration, quick injection and setting confirmation.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An intravenous pump, comprising: the system comprises an ARM processor, a power circuit, a motor driving circuit, a sensing detection circuit and a transmission device;

2. The iv pump of claim 1 wherein the mounting bracket has two sets of U-shaped channels configured to receive syringe baffles of 10ml and 20ml sizes.

3. The iv pump of claim 2 wherein the photo detection switch is mounted in a U-shaped groove.

4. The iv pump of claim 1 wherein said ARM processor employs an STM8S003F3ARM processor.

5. The iv pump of claim 1, wherein the ac-dc converter circuit is implemented using an LH25-10B15 power chip and the battery management circuit is implemented using a BQ3060 chip.

6. The iv pump of claim 1 wherein the motor drive circuit employs a TB622092FG driver chip.

7. The iv pump of claim 1, further comprising a liquid crystal display, wherein the liquid crystal display is coupled to the ARM processor bus.

8. The intravenous injection pump of claim 1, further comprising input keys electrically connected to an ARM processor bus, wherein the input keys are 4 groups, and the functions of start/stop of injection, mode switching, parameter selection, and buzzer silencing are realized.

9. The iv pump of claim 1 wherein an encoder is coupled to the stepper motor, the encoder being in electrical communication with the ARM processor.

10. The iv pump of claim 1 further comprising an alarm circuit in electrical communication with the ARM processor, the alarm circuit comprising a buzzer.