Liquid level detection circuit, detection device and detection system
By employing differential signal acquisition and transmission in liquid level detection, and utilizing first and second sensors and a differential gain module to process the signal, the inaccuracy problem of liquid level detection under abnormal temperature conditions is solved, achieving higher detection accuracy.
CN224365596UActive Publication Date: 2026-06-16BEIJING ORIENTAL JICHENG CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING ORIENTAL JICHENG CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-06-16
AI Technical Summary
Technical Problem
Existing liquid level detection technologies are easily affected by interference under complex working conditions, especially under abnormal temperature conditions, leading to inaccurate liquid level height calculations.
Method used
A differential signal acquisition and transmission method is adopted. First and second sensors are set in the container to detect zero liquid level and liquid level height respectively, and a differential gain module is used for signal processing to generate liquid level signal.
Benefits of technology
It improves the accuracy of liquid level detection, reduces the impact of temperature changes and common-mode noise on detection, and ensures the accuracy of liquid level height calculation.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224365596U_ABST
Abstract
The application relates to the technical field of vehicle-mounted signal testing, in particular to a liquid level detection circuit, a detection device and a detection system. The circuit comprises a first sensor, a second sensor and a differential gain module, wherein: the first sensor and the second sensor are arranged in a to-be-detected container; the first sensor is used for detecting zero liquid level in the to-be-detected container and generating a reference voltage signal, and the reference voltage signal is input to the negative input end of the differential gain module; the second sensor is used for detecting the liquid level height in the to-be-detected container and generating a detection voltage signal, and the detection voltage signal is input to the positive input end of the differential gain module; the differential gain module is used for performing differential gain processing on the reference voltage signal and the detection voltage signal to obtain a liquid level signal, and feeding back the liquid level signal to an upper computer; the liquid level signal represents the actual liquid level height in the to-be-detected container. The scheme can improve the liquid level detection precision.
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