公开(公告)号：US3788410A

公开(公告)日：1974-01-29

申请号：US3788410D

申请日：1972-08-02

Applicant: METTLER INSTRUMENTE AG

Inventor： ALLENSPACH H ,  MEIER E

IPC: G01G3/16 ,  G01L1/10 ,  G01G23/22

CPC classification number: G01G3/16 ,  G01L1/10

Abstract: Force measuring apparatus of the type including a mechanical oscillator, such as a string, that vibrates under load to produce a signal voltage the frequency of which is a function of the force to be measured. The invention is characterized in that following multiplication of the signal frequency, the signal is fed to multi-stage counter means for selected long or short periods of time corresponding with the desired sensitivity of measurement. The duration of the period of connection is controlled by a gate timing switch which is operable simultaneously with a stage selection switch associated with the counter, whereby when the connection periods are alternately long and short, the signal to be counted is fed to lower and upper counter stages, respectively. The gate tuning switch is operable alternately by a reference signal supplied from a mechanical oscillator, such as a crystal, or a reference string contained in the same housing as the measuring string.

Abstract translation: 这种类型的力测量装置包括诸如弦杆的机械振荡器，其在负载下振动以产生其频率是要测量的力的函数的信号电压。 本发明的特征在于，在信号频率乘以之后，将信号馈送到多级计数器装置，以对应于期望的测量灵敏度选择的长时间或短时间段。 连接周期的持续时间由门计时开关控制，该门定时开关可与与计数器相关联的级选择开关同时操作，由此当连接周期交替长而短时，要计数的信号被馈送到下和上 计数器阶段。 栅极调谐开关可以由诸如晶体的机械振荡器或包含在与测量串相同的壳体中的参考串提供的参考信号交替操作。

公开(公告)号：US3788134A

公开(公告)日：1974-01-29

申请号：US3788134D

申请日：1972-11-10

Applicant: METTLER INSTRUMENTE AG

Inventor： MEIER E

IPC: G01L1/00 ,  G01G3/16 ,  G01G3/18 ,  G01L1/04 ,  G01L1/10

CPC classification number: G01G3/165 ,  Y10S73/01 ,  Y10S177/05

Abstract: Force or length measuring apparatus including a movable membersuch as a pan carrier-movably connected with a housing, and a measuring member-such as an oscillating string element or a traction spring-connected between said housing and said movable member for measuring the movement of said movable member, characterized by the provision of temperature compensation means including at least one pair of cooperating permanent magnets for applying to at least one of said movable and measuring members a biasing force of a magnitude and direction to compensate for temperature-responsive variations in a physical property of the measuring member, thereby to reduce the influence of variations in temperature on the resulting measurement.

Abstract translation: 力或长度测量装置包括可动构件，例如可移动地连接到壳体的托盘支架，以及测量构件，例如摆动弦元件或连接在所述壳体和所述可移动构件之间的牵引弹簧，用于测量运动 的特征在于提供温度补偿装置，该温度补偿装置包括至少一对配合的永磁体，用于向所述可移动和测量构件中的至少一个施加大小和方向的偏置力，以补偿温度响应变化 测量构件的物理性质，从而减少温度变化对所得测量的影响。