Liquid level detection device, liquid level detection method and detection module

Abstract

The invention provides a liquid level detection device, a liquid level detection method and a detection module. The liquid level detection device comprises a probe and a motion control module. The method includes collecting a parameter value between the probe and a reference surface; determining whether or not the parameter value reaches an absolute threshold value; seeding a first signal to respond when the parameter value reaches the absolute threshold value, wherein the first signal indicates the motion control module to control the probe to stop motion or slow down; determining whether or not a parameter value collected when the probe stops motion or slows down reaches the absolute threshold value; sending a second signal to respond when the parameter value reaches the absolute threshold value, wherein the second signal indicates the motion control module to control the probe to complete detection motion. The liquid level detection device, the liquid level detection method and the detection module have the advantages that digital signal noise can be filtered out without influences on detection sensitivity, and accuracy in liquid level detection is improved.

Description

technical field [0001] The present application relates to the field of inspection equipment, in particular to a liquid level detection device and method and a detection module. Background technique [0002] Currently, liquid level detection devices (for example, capacitive liquid level detection devices) are commonly used in biomedical devices for liquid level detection. In order to reduce the carryover contamination of the probes of inspection instruments, manufacturers usually configure liquid level detection modules on the probes of the instruments. Therefore, the stability, timeliness, and accuracy of liquid level detection will directly affect the test results of samples. [0003] An existing liquid level detection device uses a relative threshold to judge whether a liquid level is detected. When the liquid level detection action is performed, as the probe moves downward, the parameter value between the probe and the reference surface (for example, capacitance value, ...

AI Technical Summary

Problems solved by technology

However, since the above filtering algorithm needs to continuously collect multiple data, the collection of each data takes a certain amount of time, which wil

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