Abstract: A fetal Doppler (10) and a detection method, which relate to the technical field of medical devices. The fetal Doppler (10) comprises a housing (1, a fetal detection unit (20) and a maternal parameter detection unit (30), wherein the fetal detection unit (20) and the maternal parameter detection unit (30) are respectively used for collecting fetal physiological data and maternal physiological data; a controller (7) is arranged in an internal cavity of the housing (1); and the controller (7) is used for analyzing the collected fetal physiological data and maternal physiological data, so as to obtain a fetal heart rate and a maternal parameter. The same fetal Doppler (10) is used, such that the instrument cost is reduced; and maternal and fetal parameters can be acquired at the same time by directly using the same fetal Doppler (10), such that an instrument structure is simplified, and the detection efficiency of the maternal and fetal parameters is improved.

Abstract: The present invention relates to controlled cooling in manufacture of steel plate, and in particular, to an on-line cooling system for controlled rolling with an inter-pass cooling process, which comprises a rolling mill and on-line cooling equipment. The cooling equipment is accessorily arranged on the exit of the rolling mill, so that the rolling mill and the cooling equipment are combined. One rolling mill and one set of on-line cooling equipment are considered a cooling group, and several such groups are connected in series, so the steel plate can be cooled in any rolling pass. In this invention, both the cooling system and the water supply system are arranged on the main frame, and the rolling process and the cooling process are synchronized by using inter-pass cooling. Consequently, satisfied rolling effect in the condition of a temperature gradient along the thickness direction, grain refinement at the surface and drastic strength improvement without sacrificing toughness are achieved.

Abstract: The present invention relates to controlled cooling in manufacture of steel plate, and in particular, to an on-line cooling system for controlled rolling with an inter-pass cooling process, which comprises a rolling mill and on-line cooling equipment. The cooling equipment is accessorily arranged on the exit of the rolling mill, so that the rolling mill and the cooling equipment are combined. One rolling mill and one set of on-line cooling equipment are considered a cooling group, and several such groups are connected in series, so the steel plate can be cooled in any rolling pass. In this invention, both the cooling system and the water supply system are arranged on the main frame, and the rolling process and the cooling process are synchronized by using inter-pass cooling. Consequently, satisfied rolling effect in the condition of a temperature gradient along the thickness direction, grain refinement at the surface and drastic strength improvement without sacrificing toughness are achieved.