Sample analyzer, automatic sample injection device, and sample injection control method

The invention discloses an automatic sample injection device. The automatic sample injection device comprises a sample injection base, a placement rack driving mechanism, a length detection sensor andat least one placement rack, wherein the placement rack driving mechanism is arranged on the sample injection base, the placement rack is arranged on the sample injection base and can be driven by the placement rack driving mechanism to move, the placement rack is used for placing at least one sample container, and the length detection sensor is used for detecting the length of the sample container passing through the corresponding position of the length detection sensor. The invention also discloses a sample analyzer and a sample injection control method. By means of the mode, the sample detection efficiency can be improved, the length of the sample container can be recognized, and sample false detection is avoided. 本申请公开了一种自动进样装置，该自动进样装置包括进样基座、放置架驱动机构、长度检测传感器以及至少一个放置架，放置架驱动机构设置于进样基座上，放置架设置于进样基座上，且可由放置架驱动机构驱动移动，