公开(公告)号：US4125021A

公开(公告)日：1978-11-14

申请号：US692023

申请日：1976-06-01

申请人： Mitsuru Kamei ,  Uno Osamu ,  Ogawa Toru ,  Ishii Yoichiro ,  Satomi Masahiro

发明人： Mitsuru Kamei ,  Uno Osamu ,  Ogawa Toru ,  Ishii Yoichiro ,  Satomi Masahiro

IPC分类号： G01F23/26

CPC分类号： G01F23/26

摘要： An apparatus for detection of the level of a liquid metal is disclosed. The apparatus has a liquid level detecting probe provided with an exciting coil wound in a closed bottom non-magnetic sheath over the approximately whole length thereof, a level detecting coil wound in the sheath in an upper part thereof, and a temperature compensating coil wound in the sheath in a lower part thereof; a temperature control for maintaining the coils at a constant temperature; a drive circuit for supplying the exciting coil with an alternating current of a determined frequency and amplitude; and a signal processing circuit for subjecting output voltages induced in the liquid level detecting coil and in the temperature compensating coil to linear detection and then determining the ratio of the thus detected outputs, thereby detecting the level of the liquid metal. At the time of operation, the liquid level detecting probe is immersed in the liquid metal the level of which is to be detected in such a manner that the temperature compensating coil is always located below the level of the liquid metal.

摘要翻译： 公开了一种用于检测液态金属的液位的装置。 该装置具有液面检测探针，其设置有在其大致整个长度上缠绕在封闭的底部非磁性护套中的励磁线圈，在其上部缠绕在护套中的电平检测线圈和缠绕在该护套中的温度补偿线圈 护套在其下部; 用于将线圈保持在恒定温度的温度控制; 驱动电路，用于向所述励磁线圈提供确定的频率和幅度的交流电; 以及信号处理电路，用于对在液位检测线圈和温度补偿线圈中感应的输出电压进行线性检测，然后确定由此检测的输出的比率，从而检测液态金属的电平。 在操作时，将液面检测探针浸入待检测液位的液态金属中，使其温度补偿线圈始终位于液态金属的水平以下。