一种输液瓶电容式液位检测传感模块
By introducing capacitive electrodes, resistive electrodes, and sliding contacts into the capacitive liquid level detection sensor module of the infusion bottle, and combining it with the main control module, the problems of electrode interference and cross-interference are solved, enabling rapid adaptation and high-precision measurement of infusion bottles of different heights.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN QUANQIXIN TECHNOLOGY CO LTD
- Filing Date
- 2025-10-10
- Publication Date
- 2026-07-17
AI Technical Summary
Existing capacitive liquid level detection sensing modules are prone to measurement errors when dealing with infusion bottles of different heights. The excess electrode parts are easily interfered with by surrounding objects. Furthermore, when multiple bottles are used simultaneously, it is difficult to avoid cross-interference. There is a lack of detection modules with simple structure, strong adaptability, and strong anti-interference ability.
A capacitive liquid level detection sensor module for infusion bottles was designed. It adopts an axially arranged capacitive electrode and a parallel resistive electrode, combined with a sliding contact and a main control module. By manually adjusting the sliding contact and the confirmation button, it can quickly adapt to different bottle heights and initialize the range of the sensor module.
It enables rapid adaptation to infusion bottles of different heights, improves measurement accuracy and anti-interference ability, is easy to operate, is suitable for various sizes of infusion bottles, and reduces measurement errors.
Smart Images
Figure CN224517877U_ABST
Abstract
Claims
1. A capacitive liquid level detection sensor module for an infusion bottle, characterized by, have: At least one capacitive electrode is axially disposed inside the infusion bottle to form a capacitance with the wall of the infusion bottle in order to detect the liquid level point inside the infusion bottle; At least one resistive electrode, which is arranged parallel to the capacitive electrode, is used to detect the height of the infusion bottle; A sliding contact is disposed on the resistive electrode and slidably connected to the resistive electrode, used to adjust the resistance value of the resistive electrode according to the height of the infusion bottle; The main control module has its input terminals connected to the output terminals of the capacitor electrode and the resistor electrode, respectively, for acquiring the liquid point and the resistance value, and initializing the range of the sensing module based on the feedback resistance value and the liquid point.
2. The capacitive liquid level detection sensor module for infusion bottles according to claim 1, characterized in that, The capacitor electrode and the resistor electrode are at the same height and are both connected to the analog-to-digital conversion circuit of the main control module.
3. The capacitive liquid level detection sensor module for infusion bottles according to claim 1, characterized in that, The sliding contact is a manually adjustable structure used to accommodate infusion bottles of different heights.
4. The capacitive liquid level detection sensor module for infusion bottles according to any one of claims 1-3, characterized in that, It also includes a confirmation button module, one end of which is connected to a signal terminal of the main control module. During initialization, when the confirmation button is pressed, the main control module reads the resistance value of the resistive electrode, calculates the height of the infusion bottle, and initializes the range of the sensing module.
5. The capacitive liquid level detection sensor module for infusion bottles according to any one of claims 1-3, characterized in that, The capacitor electrode is made of copper foil, and the resistor electrode is made of alloy resistor.
6. The capacitive liquid level detection sensor module for infusion bottles according to claim 4, characterized in that, It also includes a capacitor electrode interface, which is externally connected to both ends of a capacitor electrode. The capacitor electrode interface and the infusion bottle wall together form a capacitor.
7. The capacitive liquid level detection sensor module for infusion bottles according to claim 4, characterized in that, It also includes a resistor electrode interface, wherein one end of the resistor electrode is externally connected to the resistor electrode and the sliding contact. When the user manually adjusts the sliding contact according to the height of the infusion bottle, the resistance value of the circuit is changed. The main control module can calculate the current resistance value of the resistor electrode by measuring the voltage at the INA-ADC and INB-ADC points. The resistance value is linearly related to the position of the sliding contact.
8. The capacitive liquid level detection sensor module for infusion bottles according to claim 7, characterized in that, It also includes an eleventh resistor, one end of which is connected to one end of the resistor electrode interface, and the eleventh resistor is connected to the other end of the resistor electrode interface.