发明授权
- 专利标题: Electromagnetic load-compensation weighing apparatus including temperature compensation means
- 专利标题(中): 包括温度补偿装置的电磁负载补偿称重装置
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申请号: US21208申请日: 1987-03-03
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公开(公告)号: US4730683A公开(公告)日: 1988-03-15
- 发明人: Arthur Reichmuth
- 申请人: Arthur Reichmuth
- 申请人地址: CHX Greifensee
- 专利权人: Mettler Instrumente AG
- 当前专利权人: Mettler Instrumente AG
- 当前专利权人地址: CHX Greifensee
- 优先权: CHX1569/86 19860418
- 主分类号: G01K7/16
- IPC分类号: G01K7/16 ; G01G7/04 ; G01G23/48 ; G01K7/00 ; G01G7/00
摘要:
Weighing apparatus of the electromagnetic load compensation type is provided with a movable coil arranged in the air gap of a permanent magnet system, and which includes a load-compensation winding through which flows a load-dependent compensation current. As a temperature sensor for measuring the coil temperature, use is made of the coil, specifically, either the load winding itself or an additional winding that is in thermal contact with it. A resistance measuring device determines its temperature-dependent resistance from the voltage and the current on or in the winding. Accurate and real-time measurement of the coil temperature as a measure for controlling the compensation of its influence on the measurement reading is possible in this way.
公开/授权文献
- USD401346S Combined limb conditioning and massaging tool 公开/授权日:1998-11-17
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