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1. 发明专利

JPH03207584A WELDING DIAGNOSTIC SYSTEM 失效
公开(公告)号：JPH03207584A
公开(公告)日：1991-09-10
申请号：JP5690
申请日：1990-01-05
申请人： NIPPON STEEL CORP
发明人： MAEKAWA TOYOHIRO , SUMIYA EIJI , KAMIYA MAMORU , NAKAMURA HIDETO
IPC分类号： B23K11/25
摘要： PURPOSE:To avoid trouble caused by abnormality of weld by setting some permissible range based on the reference value to plate thickness and material quality to be welded and deciding as welding condition abnormality when the measured value of surface temp. of weld, etc., exceeds the permissible range. CONSTITUTION:Voltage and large current from welder transformer circuit are supplied to the materials to be welded S1, S2 through electrodes 3A, 3B to execute resistance weld. Then, the welding surface temp. T, welding primary voltage E, welding primary current I, electrode ring pressurizing force P, welding speed S, lapping length L and input heat quantity W are measured, respectively. Each permissible range is set based on the reference value to the thickness and the material quality of the plate to be welded. When at least one measured value among the measured values exceeds the permissible value, it is decided that the welding condition abnormality exists. By this method, the operator quickly detects the abnormality and action of rewelding can be executed.

2. 发明专利

JPH0727595A WATER SUPPLY CONTROL MONITORING METHOD FOR YARD SPRINKLING 失效
公开(公告)号：JPH0727595A
公开(公告)日：1995-01-27
申请号：JP19562293
申请日：1993-07-14
申请人： NIPPON STEEL CORP
发明人： MAEKAWA TOYOHIRO
IPC分类号： G01F23/00 , G01F25/00 , G05B9/02
摘要： PURPOSE:To accurately monitor water supply control by judging the presence of an abnormality via a time check based on a normal pattern and the water supply quantity when a water level gauge is made defective. CONSTITUTION:Water level sensors HH, H, L, LL are installed on a water tank 1 as a water level gauge 2. In the case other than five patterns at the time of the normal operation: all sensors off, only LL on, LL and L on, LL and L and H on, all sensors on, the water level gauge 2 is judged as abnormal, and a warning is displayed 12. When the sensor HH is made defective, for example, in a time check of the water supply quantity, if the value added with ((Q1+Q2+Q3)divided by SXTa) to the water level H1 when the sensor H is turned on from off is larger than HH, the water level gauge 2 is judged as abnormal, and a warning is displayed 12, where Q1 is the discharge flow when a discharge valve 9 is fully opened and a sprinkling pump 10 is started, Q2 is the water supply quantity when a cascade water supply valve 8 is fully opened, Q3 is the water supply quantity when a raw water supply valve 7 is fully opened, S is the bottom area of the water tank 1, and Ta is a water supply timer time set value.

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