公开(公告)号：US5424598A

公开(公告)日：1995-06-13

申请号：US192458

申请日：1994-01-18

Applicant: James P. Corbett

Inventor： James P. Corbett

IPC: G01L1/16 ,  G01L9/00 ,  H01L41/08

CPC classification number: G01L9/0022 ,  G01L1/162

Abstract: A force or fluid pressure transducer comprises a plate-like crystal. The force, to be measured, is applied by two seatings disposed on opposite edges of the crystal. The transducer can measure pressure when a diaphragm is added to provide the force.Two portions of the crystal are maintained in continuous oscillation by feed-back circuits. These portions change their frequencies by different amounts when the force is changed. The difference between the two frequencies is a very accurate measure of the force and forms the output of the transducer.Structures to secure the crystal have, in the past, proved difficult to manufacture. The present invention describes a securing structure for the crystal which substantially improves and facilitates securing and housing the crystal to provide high accuracy under all normal working conditions of the transducer.

Abstract translation: 力或液体压力传感器包括板状晶体。 待测量的力由设置在晶体相对边缘上的两个座进行施加。 传感器可以在加入隔膜以提供力时测量压力。 晶体的两部分通过反馈电路保持连续振荡。 当力改变时，这些部分将其频率改变不同的量。 两个频率之间的差异是对力的非常精确的测量并形成换能器的输出。 过去证明难以制造晶体的结构。 本发明描述了一种用于晶体的固定结构，其基本上改善并且便于固定和容纳晶体，以在换能器的所有正常工作条件下提供高精度。

公开(公告)号：US5339698A

公开(公告)日：1994-08-23

申请号：US72903

申请日：1993-06-07

Applicant: Michael J. Robinson ,  James R. Woodruff

Inventor： Michael J. Robinson ,  James R. Woodruff

IPC: G01L1/16 ,  G01L1/00

CPC classification number: G01L1/162

Abstract: A vibrating beam force transducer is comprised of an oscillating sensing element having a frequency output indicative of the force applied to the sensing element. The sensing element has a variable electrical resistance which can vary in accordance with temperature fluctuations over the operating range of the transducer.A drive circuit is electrically coupled to the sensing element for causing the sensing element to oscillate at a resonant frequency that is a function of the force applied to the sensing element. The drive circuit includes a source of DC voltage, which is utilized for altering the electrical characteristics of the drive circuit in response to variations in the electrical resistance of the sensing element.

Abstract translation: 振动梁力传感器包括具有指示施加到感测元件的力的频率输出的振荡感测元件。 感测元件具有可变电阻，其可以根据换能器的操作范围上的温度波动而变化。 驱动电路电耦合到感测元件，用于使感测元件以作为施加到感测元件的力的函数的谐振频率振荡。 驱动电路包括直流电压源，其用于响应于感测元件的电阻的变化而改变驱动电路的电特性。

公开(公告)号：US5123035A

公开(公告)日：1992-06-16

申请号：US565334

申请日：1990-08-10

Applicant: Werner Hottinger ,  Fridolin Wiget

Inventor： Werner Hottinger ,  Fridolin Wiget

IPC: G01P15/08 ,  G01D5/243 ,  G01L1/16 ,  G01P15/097 ,  G01P15/10

CPC classification number: G01P15/097 ,  G01D5/243 ,  G01L1/162 ,  G01P2015/0828

Abstract: A processing circuit is provided for signals (S.sub.1, S.sub.2) supplied by two transducers measuring a physical quantity parameter in a differential mode and delivering a signal representative of this parameter. This processing circuit essentially comprises a first counter for counting within a measurement period an integer N.sub.1 of periods T.sub.1 of the signal S.sub.1, a second counter for counting within this period of measurement an integer N.sub.2 of periods T.sub.2 of the signal S.sub.2, and a logic circuit to deliver a signal S.sub.m representative of the difference between the interval N.sub.1 .multidot.T.sub.1 and the interval N.sub.2 .multidot.T.sub.2, this signal being representative of the value of the physical parameter. The circuit is useful for measuring acceleration, force, pressure or temperature.

Abstract translation: 为由差分模式中的物理量参数测量的两个换能器提供的信号（S1，S2）提供一个处理电路，并传送代表该参数的信号。 该处理电路基本上包括用于在测量周期内对信号S1的周期T1的整数N1进行计数的第一计数器，在该测量周期内对信号S2的周期T2的整数N2进行计数的第二计数器和逻辑电路 以传递表示间隔N1xT1和间隔N2xT2之间的差的信号Sm，该信号表示物理参数的值。 该电路可用于测量加速度，力，压力或温度。

公开(公告)号：US5020370A

公开(公告)日：1991-06-04

申请号：US422170

申请日：1989-11-28

Applicant: Alain Deval ,  Yvon Amand

Inventor： Alain Deval ,  Yvon Amand

IPC: G01L1/10 ,  G01L1/16 ,  G01P15/097 ,  G01P15/10 ,  G01L1/26

CPC classification number: G01P15/097 ,  G01L1/162 ,  G01P2015/0828

Abstract: A vibrating force transducer suitable for use in a pendular accelerometer mprises a flat elongated strip of piezo-electric material having end portions arranged for being securely connected to elements which apply a force to be measured along the direction of elongation when the transducer is in service. The strip is fractionated by slits parallel along the direction of elongation and orthogonal to major faces of the strips into a central beam and lateral beams which are in a common plane, the lateral beams carrying electrode means for flexural vibration in the common plane at a resonance frequency indicative of the value of the force applied to the end portions and the central beam carrying a resistive temperature sensor.

Abstract translation: 适用于摆式加速度计的振动力传感器包括压电材料的扁平细长条带，其端部布置成牢固地连接到当换能器使用时沿着伸长方向施加测量力的元件。 带材通过沿着伸长方向平行的狭缝分段，并且与条带的主面正交，形成中心束和处于公共平面的横向梁，横梁承载电极装置，用于共振平面内的谐振 频率指示施加到端部的力的值和携带电阻式温度传感器的中心束。

公开(公告)号：US4856350A

公开(公告)日：1989-08-15

申请号：US112409

申请日：1987-10-22

Applicant: Richard A. Hanson

Inventor： Richard A. Hanson

IPC: G01L1/16 ,  G01P15/097 ,  G01P15/10

CPC classification number: G01P15/097 ,  G01L1/162 ,  Y10S73/01

Abstract: A force sensing device especially suitable for use in an accelerometer or a pressure transducer, depending upon its particular design. This device includes at least one and preferably two adjacent and parallel, elongated vibratable tines and means for vibrating the tines back and forth in a direction normal to their axes of elongation. These tines are supported for vibration by an arrangement including an array of interconnected links and mounting means adapted to be connected to an external member capable of applying a variable external force to the support arrangement along an axis normal to the axes of elongation of the tines. The support arrangement is configured so as to apply to the tines its own internal force in response to and varying with the external force in a way which causes the tines to vibrate at a frequency that varies with the magnitude of the internal force and therefore the external force. In this way, the vibrating frequency of either or both tines can be sensed for determining therefrom the magnitude of the external force applied to the support arrangement.

公开(公告)号：US4743790A

公开(公告)日：1988-05-10

申请号：US38235

申请日：1987-04-14

Applicant: William C. Albert

Inventor： William C. Albert

IPC: G01L1/16 ,  G01P15/097 ,  G01P15/10 ,  H03H9/17 ,  H01L41/08

CPC classification number: H03H9/17 ,  G01L1/162 ,  G01P15/097

Abstract: A vibrating beam resonator is formed with a unitary isolator mass at each end of the vibratory beam. Isolator springs connected to the unitary masses are joined to mounts. Forces applied to the mounts cause the vibrating beam frequency to vary to enable precise force measurements. With this arrangement, fewer cutting operations are required to produce the vibrating beam resonator than were necessary with known resonators. In a preferred embodiment, a side of the vibratory beam is formed by an edge of the crystal blank from which the resonator is cut to further reduce cutting time. This also permits cuts to be made from only one side of the blank.

Abstract translation: 振动梁共振器在振动梁的每一端形成一个整体的隔离物质。 连接到单一块的隔离器弹簧连接到安装座。 施加到安装座的力导致振动波束频率变化，以实现精确的力测量。 通过这种布置，制造振动束谐振器所需的切割操作比已知的谐振器所需要的少。 在优选实施例中，振动梁的一侧由晶体坯料的边缘形成，谐振器从该边缘被切割以进一步减少切割时间。 这也允许从空白的一侧进行切割。

公开(公告)号：US4544858A

公开(公告)日：1985-10-01

申请号：US616050

申请日：1984-06-01

Applicant: Yuzuru Nishiguchi ,  Shigeru Uchiyama ,  Masaaki Kobayashi

Inventor： Yuzuru Nishiguchi ,  Shigeru Uchiyama ,  Masaaki Kobayashi

IPC: G01G3/16 ,  G01L1/10 ,  G01L1/16 ,  H01L41/08

CPC classification number: G01L1/10 ,  G01G3/165 ,  G01L1/162 ,  Y10S177/11

Abstract: A mechanism for converting a weight into a frequency by means of a tuning fork vibrator having a pair of elongated plate-like vibrating strips extending in parallel with each other, a lever unit with a power pivot, fulcrum pivot and a load pivot, and a base portion, both ends of the tuning fork vibrator being coupled with the power pivot of the lever unit and the base portion, respectively by means of thin plate-like members. The weight to be converted is applied to the load pivot of the lever unit and is transferred to the tuning fork vibrator by means of the lever unit. All the parts of the mechanism are formed integrally from a single plate.

Abstract translation: 一种借助于具有彼此平行延伸的一对细长板状振动条的音叉振动器将重量转换成频率的机构，具有动力枢轴，支点枢轴和负载枢轴的杆单元，以及 音叉振动器的两端分别通过薄板状构件与杠杆单元和基座部分的动力枢轴连接。 要转换的重量应用于杠杆单元的负载枢轴，并通过杠杆单元传递到音叉振动器。 机构的所有部分都是从单个板形成的。

公开(公告)号：US4535638A

公开(公告)日：1985-08-20

申请号：US538171

申请日：1983-10-03

Applicant: Errol P. EerNisse ,  Roger W. Ward

Inventor： Errol P. EerNisse ,  Roger W. Ward

IPC: G01D3/032 ,  G01D5/243 ,  G01D21/02 ,  G01H17/00 ,  G01K7/32 ,  G01L1/10 ,  G01L1/16 ,  G01N9/00

CPC classification number: G01K7/32 ,  G01D3/032 ,  G01L1/10 ,  G01L1/106 ,  G01L1/162 ,  Y10S73/04

Abstract: A method and apparatus for measuring force or other parameters and temperature. The apparatus includes an oscillator and a vibratory element, such as a quartz crystal, which is caused to resonate by the oscillator at two frequencies f.sub.1 and f.sub.2 selected from the fundamental frequency and its overtone frequencies of the vibratory element. The vibratory element is selected so that the two frequencies f.sub.1 and f.sub.2 both vary with variation in force (or other parameter) applied to the element and with variation in temperature of the element, and so that the magnitude or scale factor of variation for frequency f.sub.1 is different from that for frequency f.sub.2. The apparatus also includes a detection device for detecting the frequencies f.sub.1 and f.sub.2 and for producing signals representing the frequency variation of the two frequencies relative to a reference frequency, and a processor for processing the signals produced by the detector device for determining the force (or other parameter) and temperature to which the vibratory element is subjected.

Abstract translation: 用于测量力或其他参数和温度的方法和装置。 该装置包括振荡器和诸如石英晶体的振动元件，其被振荡器以从振动元件的基频和其泛音频率中选出的两个频率f1和f2谐振。 选择振动元件使得两个频率f1和f2都随着施加到元件的力（或其他参数）的变化以及元件的温度变化而变化，并且使得频率f1的变化的幅度或比例因子 与频率f2不同。 该装置还包括用于检测频率f1和f2并用于产生表示相对于参考频率的两个频率的频率变化的信号的检测装置，以及用于处理由检测器装置产生的用于确定力的信号的处理器（或 其他参数）和振动元件所承受的温度。

公开(公告)号：US4531073A

公开(公告)日：1985-07-23

申请号：US499772

申请日：1983-05-31

Applicant: Errol P. EerNisse

Inventor： Errol P. EerNisse

IPC: H03H9/17 ,  G01L1/16 ,  H03H9/19 ,  H03H9/21 ,  H01L41/08 ,  G01L1/10

CPC classification number: H03H9/21 ,  G01L1/162 ,  Y10S73/01

Abstract: An apparatus and method for exciting a piezoelectric crystal resonator has an electric oscillator connected to a double ended tuning fork piezoelectric crystal so that it flexurally vibrates in air at its mechanical resonant frequency. A novel electrode pattern connects the oscillator to the crystal such that changes in humidity do not affect the resonant frequency of the crystal. This arrangement is useful in measuring force, such as weight.

Abstract translation: 用于激发压电晶体谐振器的装置和方法具有连接到双端音叉压电晶体的电振荡器，使得其在机械谐振频率下在空气中弯曲地振动。 新颖的电极图案将振荡器连接到晶体，使得湿度的变化不影响晶体的谐振频率。 这种布置在测量力（例如重量）方面是有用的。

公开(公告)号：US4439705A

公开(公告)日：1984-03-27

申请号：US328520

申请日：1981-12-08

Applicant: James P. Corbett

Inventor： James P. Corbett

IPC: G01B7/16 ,  G01L1/16 ,  G01L9/00

CPC classification number: G01L1/162 ,  G01B7/16 ,  G01L9/0022

Abstract: A force or fluid pressure transducer comprises two plate-like crystals. The force is applied to the first of the two crystals in a direction generally along the crystal faces by two seatings situated at opposing edges of the crystal.An oscillating portion of this first crystal changes its frequency by an amount which is a very accurate measure of the force, providing the ambient temperature of the instrument remains constant.The present invention resides in a second crystal secured to the first crystal at particular force insensitive points, there being very small spacing between the two crystals. The second crystal sustains a negligibly small amount of the force and hence a similar oscillating portion of this second crystal undergoes negligibly small frequency change.Means are provided for adjusting the steady-state temperature behavior of one crystal with respect to that of the other in order to remove residual errors.The instrument output signal is formed by generating the difference frequency between the two crystals. This difference frequency changes only negligibly when the instrument is subjected to ambient temperature changes and hence provides superior performance to earlier inventions.

Abstract translation: 力或液体压力传感器包括两个板状晶体。 通过位于晶体的相对边缘处的两个座，大致沿着晶面的方向将力施加到两个晶体中的第一个晶体。 该第一晶体的振荡部分将其频率改变一定量，该量是力的非常准确的量度，从而提供仪器的环境温度保持恒定。 本发明在于在特定的力不敏感点处固定到第一晶体的第二晶体，两个晶体之间的间隔非常小。 第二晶体维持可忽略的少量的力，因此该第二晶体的类似的振荡部分经历可忽略的小的频率变化。 提供了用于调整一个晶体相对于另一个晶体的稳态温度特性的装置，以便消除残余误差。 仪器输出信号通过产生两个晶体之间的差频而形成。 当仪器受到环境温度变化的影响时，这种差异频率变化不大，因此能够为早期的发明提供卓越的性能。