Test tube rack of analyzer pipeline, shift detection method and device using the same

A detecting device for shift detection, comprising:

• a test tube rack including a plurality of test tube holders for holding test tubes;
• a drive component for driving the test tube rack;
• a light blocker arranged on a surface of the test tube rack, the light blocker comprising a first feature area and a second feature area alternated with the first feature area, the first feature area and the second feature area optically blocking the test tubes, the second feature area having a depth different from the first feature area in a direction perpendicular to the surface of the test tube rack;
• a reflective optical sensor for detecting a reflected signal from the first feature area and the second feature area of the light blocker to output a detection signal during a shifting process of the test tube rack by the drive component, a single test tube is shifted during the shifting process of the test tube rack;
• a processor configured to acquire a stop voltage from the detection signal and a limit voltage from the detection signal during the shifting process, wherein the stop voltage is detected upon the test tube rack ending the shift, and the limit voltage is the maximum absolute value of voltage from the beginning to the end of the shift of the test tube rack;
• and the processor is further configured to determine whether a ratio of the limit voltage and the stop voltage satisfies a first condition;
• upon the determination that the first condition is satisfied, the shifting process of the test tube rack is determined as correct;
• otherwise, the shifting process of the test tube rack is determined as false.