A wireless capacitive drop detection device

Abstract

The utility model discloses a wireless capacitance type point drop detection device, including capacitance sensor module, main controller module, wireless communication module, alarm module, power module and strip type frame, the capacitance sensor module includes point drop detection device shell, point drop detection device inner shell, first plane polar plate, second plane polar plate, first plane board, third plane polar plate, fourth plane polar plate and second plane board. The present application adopts plane capacitance sensor design, can carry out the rotation collection between multiple plane polar plates, improves the detection precision, compares with traditional parallel polar plate capacitance point drop detection, and this detection mode is more stable under a variety of environments, and the performance is stable, and the price is lower, and four plane polar plates adopt galvanized steel sheet, and the detection system combines WiFi and LoRa wireless communication technology, realizes the remote transmission and large -scale centralized management of data. Low -cost, low -power consumption design is suitable for hospital large -scale deployment.

Description

Technical Field

[0001] This utility model relates to the field of medical testing technology, specifically a wireless capacitive drip testing device. Background Technology

[0002] Currently, hospitals still primarily rely on manual observation by medical staff to monitor intravenous fluid levels and drip rates. This method suffers from significant problems such as low efficiency, high human error rate, and insufficient real-time capability. Because nursing staff need to frequently patrol multiple wards, their workload is not only high, but it is also difficult to detect infusion abnormalities (such as empty drips, blockages, abnormal drip rates, etc.) in a timely manner, potentially delaying patient treatment and even leading to medical risks.

[0003] Although some liquid level detection devices have appeared on the market, existing solutions still have many limitations: most devices use wired data transmission, resulting in complex wiring in wards, affecting the flexibility of medical equipment layout, and are not conducive to the monitoring needs of mobile beds or temporary beds; traditional devices usually only have basic liquid level detection functions and lack comprehensive capabilities such as drip rate monitoring and abnormal warning, which cannot meet the needs of modern medical care for precise and automated management; existing systems mostly adopt a stand-alone operation mode, which cannot achieve unified monitoring and analysis of data from multiple terminals. Medical staff need to check the status of each device one by one, which greatly increases their workload, especially in scenarios with high infusion density such as ICU and emergency departments.

[0004] From a technical perspective, while some devices employing capacitive liquid level sensors offer the advantage of non-contact detection, they are susceptible to interference from factors such as temperature fluctuations, changes in drug viscosity, and equipment vibration in real-world clinical environments, leading to decreased detection accuracy. Furthermore, these devices are typically not deeply integrated with Internet of Things (IoT) technology, hindering remote real-time monitoring, historical data review, and intelligent early warning systems, thus limiting their application potential in smart healthcare systems. Therefore, there is a need for a drip detection system that integrates wireless communication technology, possesses high-precision detection capabilities, and enables large-scale management. Utility Model Content

[0005] The purpose of this invention is to provide a wireless capacitive drip detection device to solve the problems of liquid level and drip rate monitoring in the existing infusion process mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wireless capacitive drip detection device, comprising a capacitive sensor module, a main controller module, a wireless communication module, an alarm module, a power supply module, and a strip frame; The capacitive sensor module includes a drip detection device outer shell, a drip detection device inner shell, a first planar electrode plate, a second planar electrode plate, a first planar plate, a third planar electrode plate, a fourth planar electrode plate, and a second planar plate. The drip detection device inner shell is adapted to wrap and fix on the drip tube. The first and second planar plates are fixed in parallel array on both sides of the drip detection device inner shell. The first and second planar electrode plates are fixed on the first planar plate. The third and fourth planar electrode plates are fixed on the second planar plate. The drip detection device outer shell is fixed outside the drip detection device inner shell. The main controller module includes a control box, which is fixedly connected to the strip frame. The wireless communication module includes a communication box, which is fixedly connected to the strip frame. The alarm module includes an OLED display screen and a buzzer. The OLED display screen is fixed on the housing of the drip detection device, and the buzzer is connected to the power module. The power module is fixedly connected to the strip frame.

[0007] Preferably, the control box is equipped with a microcontroller, which is linearly connected to the first planar electrode, the second planar electrode, the third planar electrode, and the fourth planar electrode. The microcontroller is suitable for data processing and control logic execution.

[0008] Preferably, the communication box includes a WiFi module (ESP8266) and a LoRa wireless network module. The communication box is linearly connected to the control box, and the communication box is adapted to remotely transmit the data processed by the control box to a PC host computer.

[0009] Preferably, the buzzer is linearly connected to the control box, and the OLED display screen is linearly connected to the control box.

[0010] Preferably, the power module is powered by a 3.7V polymer lithium battery, and the power module is electrically connected to the OLED display screen, the buzzer, the first planar electrode plate, the second planar electrode plate, the third planar electrode plate, the fourth planar electrode plate, the control box, and the communication box.

[0011] Preferably, the capacitance sensor module acquires data through alternating sinusoidal excitation between the first planar electrode, the second planar electrode, the third planar electrode, and the fourth planar electrode. The capacitance value is converted into a voltage value using a CV conversion device, and the liquid level height is calculated by the microcontroller in the control box.

[0012] Preferably, the communication box communicates with the PC host computer via a LoRa wireless network.

[0013] Preferably, the outer shell of the drip detection device is made of 3D-printed PVC material, the inner shell of the drip detection device is made of flexible PE material, and the first planar electrode plate, the second planar electrode plate, the third planar electrode plate and the fourth planar electrode plate are made of galvanized steel plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1) This application adopts a planar capacitance sensor design, which can perform alternating sampling between multiple planar plates, improving detection accuracy. Compared with the traditional parallel plate capacitance drop detection, this detection method is more stable in various environments. 2) The outer shell of the drip detection device in this application is made of 3D-printed PVC, which is inexpensive and easy to process; 3) The inner shell of the drip detection device in this application is made of flexible PE, and the four planar electrode plates are made of galvanized steel plate, which is low in price and stable in performance; 4) The detection system of this application combines WiFi and LoRa wireless communication technologies to realize remote data transmission and large-scale centralized management. Its low-cost and low-power design is suitable for large-scale deployment in hospitals. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 A sectional view showing the overall structure of this application disconnected; Figure 3 This is a partially enlarged half-section view of this application.

[0016] In the picture: 1. Outer shell of the drip detection device; 2. Inner shell of the drip detection device; 3. Strip frame; 4. Control box; 5. Communication box; 6. Power supply; 7. Buzzer; 8. OLED display screen; 9. First planar electrode plate; 10. Second planar electrode plate; 11. First planar plate; 12. Third planar electrode plate; 13. Fourth planar electrode plate. Detailed Implementation

[0017] 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.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Please see Figure 1-3 This utility model provides a technical solution: a wireless capacitive drip detection device, including a capacitive sensor module, a main controller module, a wireless communication module, an alarm module, a power supply module 6, and a strip frame 3; The capacitive sensor module includes a drip detection device housing 1, a drip detection device inner housing 2, a first planar electrode plate 9, a second planar electrode plate 10, a first planar plate 11, a third planar electrode plate 12, a fourth planar electrode plate 13, and a second planar plate 14. The drip detection device inner housing 2 is adapted to wrap and fix on the drip tube. The first planar plate 11 and the second planar plate 14 are fixed in parallel array on both sides of the drip detection device inner housing 2. The first planar electrode plate 9 and the second planar electrode plate 10 are fixed on the first planar plate 11, and the third planar electrode plate 12 and the fourth planar electrode plate 13 are fixed on the second planar plate 14. The drip detection device housing 1 is fixed outside the drip detection device inner housing 2. The main controller module includes a control box 4, which is fixedly connected to the strip frame 3; The wireless communication module includes a communication box 5, which is fixedly connected to the strip frame 3; The alarm module includes an OLED display 8 and a buzzer 7. The OLED display 8 is fixed on the housing 1 of the drip detection device, and the buzzer 7 is connected to the power module 6. The power module 6 is fixedly connected to the strip frame 3.

[0021] Specifically, this wireless capacitive drip detection device comprises a capacitive sensor module, a main controller module, a wireless communication module, an alarm module, a power supply module 6, and a strip frame 3. The capacitive sensor module's inner shell 2 is fixed to the drip tube, while a first planar plate 11 and a second planar plate 14 are arranged in a parallel array on both sides of the inner shell 2. An electrode plate is fixed to the planar plate, and the outer shell 1 is fixed externally. The main controller module, wireless communication module, and power supply module 6 are all fixedly connected to the strip frame 3. The OLED display 8 of the alarm module is fixed to the outer shell 1, and a buzzer 7 is fixedly connected to the power supply module 6. This arrangement and connection of modules enables the device to monitor drip level changes in real time using planar capacitive sensing technology. Combined with wireless communication technology, it achieves remote data transmission and centralized management, exhibiting high precision, high stability, and low cost, making it suitable for large-scale applications in hospitals and other similar locations.

[0022] The control box 4 houses an STM32F103C8T6 microcontroller, which is linearly connected to the first planar electrode 9, the second planar electrode 10, the third planar electrode 12, and the fourth planar electrode 13. The STM32F103C8T6 microcontroller is suitable for data processing and control logic execution. Specifically, utilizing the powerful data processing capabilities and precise control logic execution capabilities of the high-performance STM32F103C8T6 microcontroller, the signals acquired by the capacitive sensor module can be quickly processed and analyzed, ensuring the accuracy and real-time performance of the liquid level detection data, and providing a reliable foundation for subsequent data transmission and alarm functions.

[0023] The communication box 5 includes a WiFi module (model ESP8266) and a LoRa wireless network module. The communication box 5 is linearly connected to the control box 4 and is suitable for remotely transmitting data processed by the control box 4 to a PC. Specifically, the combination of the WiFi module and the LoRa wireless network module enables wireless remote data transmission, avoiding the complex wiring problems associated with traditional wired transmission, improving the flexibility of equipment layout in the ward, facilitating the monitoring of mobile beds or temporary beds, and enabling interaction with the PC, laying the foundation for unified monitoring and analysis of multi-terminal data.

[0024] Buzzer 7 and control box 4 are linearly connected, as are OLED display screen 8. OLED display screen 8 is a 0.96-inch P12864-W4P096, and buzzer 7 is a KTT-5018A. Specifically, when an abnormal liquid level is detected, control box 4 controls buzzer 7 to sound an alarm, while OLED display screen 8 displays relevant data in real time. The 0.96-inch OLED display screen 8 clearly displays information such as liquid level height and drip rate, and the KTT-5018A buzzer has a loud sound, ensuring that medical staff can promptly detect abnormalities and avoid delaying patient treatment.

[0025] Power module 6 is powered by a 3.7V polymer lithium battery. Power module 6 is electrically connected to the OLED display screen 8, buzzer 7, first planar electrode plate 9, second planar electrode plate 10, third planar electrode plate 12, fourth planar electrode plate 13, control box 4, and communication box 5. Specifically, power module 6 is powered by a 3.7V polymer lithium battery and is electrically connected to the OLED display screen 8, buzzer 7, each planar electrode plate, control box 4, and communication box 5. The 3.7V polymer lithium battery has advantages such as large capacity, small size, light weight, and long lifespan, providing stable power support for the device for extended periods. This ensures that the device's detection and alarm functions will not be affected by power problems during long-term use, thus improving the reliability and stability of the device.

[0026] The capacitance sensor module acquires data through alternating sinusoidal excitation between the first planar plate 9, the second planar plate 10, the third planar plate 12, and the fourth planar plate 13. Combined with a CV converter, the capacitance value is converted into a voltage value, and the liquid level height is calculated by the microcontroller within the control box 4. Specifically, this multi-planar plate alternating acquisition method, compared to traditional parallel plate capacitance drop detection, effectively reduces interference from factors such as temperature fluctuations, changes in drug viscosity, and equipment vibration, improving detection accuracy and making the liquid level height calculation more accurate, thus providing reliable data support for clinical infusion monitoring.

[0027] Communication Box 5 communicates with the PC host computer via a LoRa wireless network, enabling centralized monitoring and management of multi-terminal data. Specifically, the LoRa wireless network features long transmission distance, low power consumption, and strong anti-interference capabilities, enabling centralized monitoring and management of multi-terminal data. Medical staff no longer need to check the status of each device individually; they can monitor the infusion status of multiple wards in real time on the PC host computer, greatly reducing their workload. Especially in scenarios with high infusion density, such as the ICU and emergency room, it can significantly improve work efficiency and promptly detect and handle abnormal infusion situations.

[0028] The outer shell 1 of the drip detection device is made of 3D-printed PVC material, the inner shell 2 is made of flexible PE material, and the first planar electrode 9, the second planar electrode 10, the third planar electrode 12, and the fourth planar electrode 13 are made of galvanized steel plate. Specifically, the 3D-printed PVC shell is inexpensive and easy to process, reducing the production cost of the device; the flexible PE inner shell has good flexibility, making it easy to wrap and fix to the drip tube, improving the ease of installation; the galvanized steel plate electrodes are inexpensive and have stable performance, ensuring the accuracy and reliability of capacitive sensing, enabling the device to have high stability at low cost, making it suitable for large-scale deployment in hospitals.

[0029] The specific working process of the device is as follows: Power switch 6 is turned on, the strip frame 3 is fixed to the middle of the drip bottle, and the inner shell 2 of the drip detection device is fixed to the middle of the drip tube. Power switch 6 applies voltage, providing sinusoidal excitation to the first planar plate 9. Control box 4 is connected sequentially to the second planar plate 10, the third planar plate 12, and the fourth planar plate 13. The capacitance value between the two planes is converted into a more easily readable voltage value by the CV device. The voltage signal is filtered in control box 4 and then acquired and stored by the microcontroller in control box 4. Following the above steps, power switch 6 sequentially provides sinusoidal excitation to the second planar plate 10, the third planar plate 12, and the fourth planar plate 13. Control box 4 collects the voltage values ​​between them and the other three planar plates in turn. The microcontroller ADC in control box 4 converts the analog signal into a digital signal, and the capacitance value is derived from the voltage value using a formula. The average of the four detected values ​​is then calculated to determine the liquid level height. Data is transmitted to the main controller via communication box 5. Simultaneously, if the liquid level is abnormal, a buzzer 7 is triggered, and the data is displayed on the OLED screen 8. The main controller uploads data to a PC via a LoRa wireless network, enabling remote monitoring and management.

[0030] 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 wireless capacitive point-of-care testing device, characterized in that, It includes a capacitive sensor module, a main controller module, a wireless communication module, an alarm module, a power supply module (6) and a bar frame (3); The capacitive sensor module includes a drip detection device housing (1), a drip detection device inner housing (2), a first planar electrode plate (9), a second planar electrode plate (10), a first planar plate (11), a third planar electrode plate (12), a fourth planar electrode plate (13), and a second planar plate (14). The drip detection device inner housing (2) is adapted to wrap and fix on the drip tube. The first planar plate (11) and the second planar plate (14) are fixed in parallel array on both sides of the drip detection device inner housing (2). The first planar electrode plate (9) and the second planar electrode plate (10) are fixed on the first planar plate (11). The third planar electrode plate (12) and the fourth planar electrode plate (13) are fixed on the second planar plate (14). The drip detection device housing (1) is fixed outside the drip detection device inner housing (2). The main controller module includes a control box (4), which is fixedly connected to the strip frame (3); The wireless communication module includes a communication box (5), which is fixedly connected to the strip frame (3); The alarm module includes an OLED display screen (8) and a buzzer (7). The OLED display screen (8) is fixed on the housing (1) of the drip detection device, and the buzzer (7) is connected to the power module (6). The power module (6) is fixedly connected to the strip frame (3).

2. The wireless capacitive drop detection device of claim 1, wherein, The control box (4) is equipped with a microcontroller, which is linearly connected to the first planar plate (9), the second planar plate (10), the third planar plate (12) and the fourth planar plate (13). The microcontroller is suitable for data processing and control logic execution.

3. The wireless capacitive drop detection device of claim 1, wherein, The communication box (5) includes a WiFi module and a LoRa wireless network module. The communication box (5) is linearly connected to the control box (4). The communication box (5) is adapted to remotely transmit the data processed by the control box (4) to a PC host computer.

4. The wireless capacitive drop detection device of claim 1, wherein, The buzzer (7) is linearly connected to the control box (4), and the OLED display (8) is linearly connected to the control box (4).

5. The wireless capacitive drop detection device of claim 1, wherein, The power module (6) is powered by a 3.7V polymer lithium battery. The power module (6) is electrically connected to the OLED display screen (8), the buzzer (7), the first planar electrode plate (9), the second planar electrode plate (10), the third planar electrode plate (12), the fourth planar electrode plate (13), the control box (4), and the communication box (5).

6. The wireless capacitive drop detection device of claim 1, wherein, The capacitance sensor module acquires data through alternating sinusoidal excitation between the first planar plate (9), the second planar plate (10), the third planar plate (12), and the fourth planar plate (13). The capacitance value is converted into a voltage value by a CV conversion device, and the liquid level height is calculated by the microcontroller in the control box (4).

7. The wireless capacitive point-of-care testing device of claim 1, wherein, The communication box (5) communicates with the PC host computer via the LoRa wireless network.

8. The wireless capacitive drip detection device according to claim 1, characterized in that, The outer shell (1) of the drip detection device is made of 3D printed PVC material, the inner shell (2) of the drip detection device is made of flexible PE material, and the first planar electrode plate (9), the second planar electrode plate (10), the third planar electrode plate (12) and the fourth planar electrode plate (13) are made of galvanized steel plate.

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