Bathroom Scale Tanita – NSL – HA-650

Weighing scales(orweigh scales或者秤) are devices to measureweight。Spring balances或者弹簧鳞片calculateweightthat is the product of mass into gravity (9.807 m/s²) on the force on a spring, whereas a balance or pair of scales using a balance beam compares masses by balancing the weight due to the mass of an object against the weight of one or more known masses. Some of them can be calibrated to read in units of force (weight) such asnewtons而不是质量单位kilograms。使用传统平衡梁的平衡或一对刻度可以正确地读取质量，即使移动到具有不同的非零引力场强度的位置也可以正确读取质量。此外，设计精心设计的弹簧平衡，可以在不同的非零引力场强度下正确读取重量的重量。

A弹簧秤measures mass by reporting the distance that aspring在负载下偏转。这对鲜明对比balance，比较了torqueon the arm due to a sample weight to thetorque由于使用水平的标准参考块，在臂上杠杆。Spring scales measureforce, which is the十ionforce作用在物体上的约束，相反地重力的力量。^[6]他们通常是calibrated因此，测量力转化为地球重力的质量。待称量的物体可以简单地悬挂在弹簧上或在枢轴和轴承平台上设置。

在弹簧鳞片中，弹簧要么伸展（如在生产部门的悬挂量表中grocery store) or compresses (as in a simple bathroom scale). ByHooke’s law, every spring has a proportionality constant that relates how hard it is pulled to how far it stretches. Weighing scales use aspringwith a known spring constant (seeHooke’s law) and measure the displacement of the spring by any variety of mechanisms to produce an estimate of thegravitational由物体施加的力。^[7]Rack and pinion mechanisms are often used to convert the linear spring motion to a dial reading.