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1. 发明授权

US4450923A Electronic weighing scale 失效
标题翻译：电子称重秤
公开(公告)号：US4450923A
公开(公告)日：1984-05-29
申请号：US450676
申请日：1982-12-17
申请人： Lothar Behrend , Erich Knothe , Franz-Josef Melcher , Jurgen Ober
发明人： Lothar Behrend , Erich Knothe , Franz-Josef Melcher , Jurgen Ober
IPC分类号： G01G23/48 , G01G7/04 , G01G1/38 , G01G3/14 , G01R17/06
CPC分类号： G01G7/04
摘要： It is known in high-resolution electronic weighing scales based on the principle of electromagnetic force compensation that the load-dependent development of heat in the coil and the precision resistor can be compensated by sending an additional alternating current through the coil and the precision resistor which is complementarily regulated in its amplitude. In order to make possible a precise regulation of the amplitude of the additional alternating current even in the case of a small carrying force of the electromagnetic force compensation and of a correspondingly small direct compensating current, the invention proposes connecting in a voltage divider in parallel to the coil and the precision resistor which has a highly temperature-dependent resistor. In this parallel branch direct and alternating current are higher by a constant proportionality factor than in the main branch formed by coil and precision resistor. The parallel branch is also part of a resistance measuring bridge which regulates the amplitude of the additional alternating current in such a manner that the highly temperature-dependent resistor retains its theoretical excess temperature and therewith its theoretical resistance value.
摘要翻译：在电磁力补偿原理的高分辨率电子称重秤中已知，线圈和精密电阻器的负载依赖性的发展可以通过发送额外的交流电流通过线圈和精密电阻来补偿，在其幅度上互补调节。为了使得即使在电磁力补偿的小承载力和相应较小的直接补偿电流的情况下，也可以精确地调整附加交流电流的幅度，本发明提出将分压器与线圈和具有高度依赖电阻的精密电阻器。在这种并联支路中，直流和交流电流比由线圈和精密电阻形成的主支路中的常数比例因子高。并联支路也是电阻测量桥的一部分，该电阻测量桥以这样的方式调节附加交流电流的振幅，使得高度依赖于温度的电阻器保持其理论上的过剩温度及其理论电阻值。

2. 发明授权

US4450924A Electronic weighing scale 失效
标题翻译：电子称重秤
公开(公告)号：US4450924A
公开(公告)日：1984-05-29
申请号：US450784
申请日：1982-12-17
申请人： Lothar Behrend , Eric Knothe , Franz-Josef Melcher , Jurgen Ober
发明人： Lothar Behrend , Eric Knothe , Franz-Josef Melcher , Jurgen Ober
IPC分类号： G01G23/48 , G01G7/04 , G01G21/24 , G01G1/38 , G01G3/14 , G01R17/06
CPC分类号： G01G21/244 , G01G7/04
摘要： It is known in high-resolution electronic weighing scales based on the principle of electromagnetic force compensation that the load-dependent development of heat in a coil and a precision resistor can be compensated by sending an additional alternating current through the coil and the precision resistor which is complementarily regulated in its amplitude. In order to regulate the amplitude of this alternating current, the invention proposes a simplified circuit which comprises a highly temperature-dependent resistor, the resistance value of which is set at a fixed theoretical value.
摘要翻译：在电磁力补偿原理的高分辨率电子称重秤中已知，通过发送额外的交流电流通过线圈和精密电阻可以补偿线圈和精密电阻器中的负载依赖性的发展，在其幅度上互补调节。为了调节该交流电流的振幅，本发明提出了一种简化的电路，其包括一个高度依赖于电阻的电阻，其电阻值被设置在固定的理论值。

3. 发明授权

US4300647A Electromagnetic force compensation scale with temperature compensation 失效
标题翻译：具有温度补偿功能的电磁力补偿量程
公开(公告)号：US4300647A
公开(公告)日：1981-11-17
申请号：US171292
申请日：1980-07-23
申请人： Erich Knothe , Franz-Josef Melcher , Jurgen Ober , Lothar Behrend
发明人： Erich Knothe , Franz-Josef Melcher , Jurgen Ober , Lothar Behrend
IPC分类号： G01G7/04 , G01G19/414 , G01G23/48 , G01G7/00 , G01G3/14
CPC分类号： G01G7/04 , G01G19/414
摘要： A scale of the electromagnetic force compensation principle, having a stationary permanent magnet system with an air gap and at least one coil positioned in the air gap, the coil being acted upon via a position sensor and a variable-gain amplifier by a compensation direct current dependent on the load of the scale, wherein the compensation direct current flows through a measuring resistor from both ends of which a signal dependent on the load of the scale is tapped off and fed to an analog/digital converter, and further electric circuits are connected therewith which permit an alternating current to flow, in addition to the compensation direct current, through the coil and the measuring resistor and including a regulating or adjusting device which modifies the amplitude of the additional alternating current in such a manner that the joulean heat generated in the coil and in the measuring resistor by the compensation direct current and by the additional alternating current is at least approximately load-independent.
摘要翻译：一种电磁力补偿原理的尺度，具有具有气隙的固定永磁体系统和位于气隙中的至少一个线圈，线圈通过位置传感器和可变增益放大器通过补偿直流电作用取决于刻度的负载，其中补偿直流从两端流过测量电阻器，其中取决于刻度的负载的信号被分接并馈送到模拟/数字转换器，并且还连接电路由此允许交流电流除了补偿直流电流之外通过线圈和测量电阻器流动，并且包括调节或调节装置，其以这样的方式修改附加交流电流的振幅，使得在线圈和测量电阻中的补偿直流电流和额外的交流电至少为一个大约负载无关。

4. 发明授权

US4619337A Electric balance with scale on top 失效
标题翻译：电动平衡与秤上
公开(公告)号：US4619337A
公开(公告)日：1986-10-28
申请号：US716082
申请日：1985-03-26
申请人： Lothar Behrend , Jurgen Ober , Erich Knothe , Franz-Josef Melcher
发明人： Lothar Behrend , Jurgen Ober , Erich Knothe , Franz-Josef Melcher
IPC分类号： G01G3/14 , G01G21/23 , G01G21/28 , G01G23/00 , G01G23/10
CPC分类号： G01G21/23 , G01G21/28
摘要： In order to reduce the coupling-in of high-frequency electromagnetic interference into the measuring system of electric balances with scale on top and with a metallic balance scale and a metallic housing, a pin (7) which establishes the connection between the balance scale (2) and the load receiver (5) of the measuring system comprises an insulating layer on its surface which is bridged by a resistor (6) located on the pin (7).
摘要翻译：为了将高频电磁干扰的耦合减小到电平衡的测量系统中，其具有在顶部和金属平衡秤和金属外壳上的刻度，销钉（7）建立平衡秤（ 2）和测量系统的负载接收器（5）包括在其表面上由位于引脚（7）上的电阻器（6）桥接的绝缘层。

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