-
公开(公告)号：US5668329A
公开(公告)日：1997-09-16
申请号：US678452
申请日：1996-07-03
Applicant: Fred Petri
Inventor： Fred Petri
CPC classification number: H03H9/21 , G01L1/106 , G01P15/097
Abstract: A double-ended tuning fork (DETF) is formed from two vibrating beams joined together at each end, having a thickness t, a width w, a length L and a vibrating beam length m. The dimensional ratios t/w and L/m for the DETF are selected according to a relatively more accurate spurious mode map based upon detailed finite element calculations at specific dimensional ratios for t/w and L/m. The results of the finite element analysis is fit by way of a lease-squared polynomial over the entire dimensional range of interest. The results of the finite element analysis for the spurious modes provides differences of up to fourteen percent (14%) relative to the spurious mode map based on simple beam theory. In addition, the spurious mode map in accordance with the present invention accounts for the use of symmetric outriggers in the base region of the DETF which increases the mechanical Q of the DETF.
Abstract translation: 双端音叉（DETF）由两端连接的两个振动梁形成，具有厚度t，宽度w，长度L和振动梁长度m。 根据基于t / w和L / m的特定尺寸比的详细有限元计算，根据相对更精确的假模式图来选择DETF的尺寸比t / w和L / m。 有限元分析的结果通过在感兴趣的整个维度范围内的租赁平方多项式拟合。 基于简单波束理论，伪模式的有限元分析结果提供了高达14％（14％）相对于虚假模式图的差异。 另外，根据本发明的杂散模式图表示了在DETF的基极区域中使用对称的支架，这增加了DETF的机械Q。
-
12.发明授权Double tuning fork type laminated force transducer, manufacturing method therefor and application thereof in a load cell 失效双音叉式层压力传感器，其制造方法及其在称重传感器中的应用
公开(公告)号：US4914963A
公开(公告)日：1990-04-10
申请号：US263073
申请日：1988-10-27
Applicant: Gerard F. Sabiron
Inventor： Gerard F. Sabiron
Abstract: A double tuning fork type force transducer comprising two identical parallel branches fastened at their ends to two coupling members adapted to vibrate in bending mode and in phase opposition in response to imposed vibrational loads with an intrinsic frequency representative of the amplitude of a force F applied longitudinally to the coupling members is laminated; it comprises two identical metal leaf springs of constant thickness forming said branches and comprising ends of larger width than said branches and held apart by two metal spacers both having the same thickness, these spacers and these ends being fastened within said coupling members and having substantially the same external profile.
Abstract translation: 双音叉式力传感器，包括两个相同的平行分支，其两端紧固在两个耦合构件上，该两个联接构件适于以弯曲模式振动并且相反地相对于所施加的振动载荷相对振动，固有频率代表纵向施加的力F的幅度 对联接构件进行层压; 它包括形成所述分支的恒定厚度的两个相同的金属板簧，并且包括宽度比所述分支宽的端部并由两个具有相同厚度的金属间隔件分开，这些间隔件和这些端部紧固在所述联接构件内并具有基本上 相同的外部轮廓。
-
公开(公告)号：US4614245A
公开(公告)日：1986-09-30
申请号：US724270
申请日：1985-04-17
Applicant: Masami Yamanaka
Inventor： Masami Yamanaka
CPC classification number: G01L1/106 , G01G21/24 , G01G3/15 , G01G3/165 , Y10S177/05
Abstract: A device for measuring force, which is preferably applicable to a weighing device, is provided, wherein two cantilever arms are arranged substantially in parallel and generally in a vertical plane, an elastic member is coupled between the free ends of the both arms so as to be subjected to tension or compression when a force to be measured is applied to the free end of the either arm, the elastic member forms a part of mechano-electric transducer which produces an electric signal whose feature has a theoretical relationship with the applied force, and the device further includes an arithmetic unit for calculating the force in accordance with this relationship.
Abstract translation: 提供一种用于测量力的装置，其优选地可应用于称重装置，其中两个悬臂基本上平行布置并且大体上在垂直平面中，弹性构件联接在两个臂的自由端之间，以便 当要测量的力施加到任一个臂的自由端时，其受到张力或压缩，弹性构件形成机械电传感器的一部分，其产生其特征与施加的力具有理论关系的电信号， 并且该装置还包括用于根据该关系计算力的运算单元。
-
公开(公告)号：US4378702A
公开(公告)日：1983-04-05
申请号：US300487
申请日：1981-09-09
Applicant: Eugene Meier
Inventor： Eugene Meier
Abstract: A flat measuring string is disclosed that is formed from a blank of sheet metal (such as a niobium-zirconium alloy), characterized by the provision of bendable or foldable wing flaps arranged at the nodal portions of the string, thereby to permit the connection of nodal masses to the string. In this manner, it is possible to achieve good measurement-technical data, especially, data regarding hysteresis and creepage under load, coupled with extensive freedom in the choice of materials and very economical mass production of the string components. The measuring string is particularly suitable for use in force or distance measurement.
Abstract translation: 公开了一种由金属片（例如铌 - 锆合金）的坯件形成的扁平测量线，其特征在于，提供设置在弦的节点部分处的可弯曲或可折叠的翼片，从而允许 节点质量到字符串。 以这种方式，可以获得良好的测量技术数据，特别是关于负载下的滞后和爬电的数据，以及材料选择的广泛自由以及弦组件的非常经济的批量生产。 测量弦特别适用于强力或距离测量。
-
15.发明授权Stress sensor particularly suitable for elastic, plastic and visco-elastic materials 失效应力传感器特别适用于弹性，塑料和粘弹性材料
公开(公告)号：US4346600A
公开(公告)日：1982-08-31
申请号：US172678
申请日：1980-07-28
Applicant: Jerome B. Johnson , Gordon F. N. Cox
Inventor： Jerome B. Johnson , Gordon F. N. Cox
CPC classification number: G01L1/106 , E02D1/022 , E21B49/006 , E21F17/185
Abstract: A cylindrical stress sensor has a case that is long relative to its diameter. The case may be completely imbedded in the body of a host material in which a change of stress is of interest. That portion of the sensor which is imbedded has a rounded end. The rounded end, circular cross section, and relatively large length-to-diameter ratio avoid errors occasioned by stress concentration. A strain transducer of a vibrating wire excited by a magnetic coil is located remote from any imbedded end of the sensor. Changes in strain on the wire alter the frequency of the wire. This change in frequency is picked up by the excitation coil as a signal. A stacked, three-transducer array, with the wire of each transducer at 45.degree. from a neighboring transducer, can detect changes in the magnitudes and directions of the principal stresses, without first establishing the direction of the primary or secondary principal stress. The effective Young's modulus of the sensor is large relative to the host material, being at least equal to, or greater than, four times the latter's modulus. The distance from a transducer to an end of the sensor to be imbedded in the host is sufficient to avoid erroneous signals occasioned by end effects of the case, and is usually at least ten radii.
Abstract translation: 圆柱应力传感器具有相对于其直径长的情况。 这种情况可能完全嵌入在其中感兴趣的压力变化的主体材料的主体中。 嵌入的传感器的那部分具有圆形端。 圆形端部，圆形横截面和相对较大的长径比避免了应力集中引起的错误。 由电磁线圈激励的振弦的应变传感器远离传感器的任何嵌入端。 导线上的应变变化会改变导线的频率。 频率的这种变化由激励线圈作为信号拾取。 每个传感器的导线与相邻的传感器相距45°的叠层式三换能器阵列可以检测主应力的大小和方向的变化，而无需首先建立初级或次级主应力的方向。 传感器的有效杨氏模量相对于主体材料大，至少等于或大于后者模量的四倍。 从传感器到要嵌入主机的传感器端部的距离足以避免由于壳体的最终影响引起的错误信号，并且通常至少为十个半径。
-
Patent Agency Ranking
公开(公告)号：US3724573A
公开(公告)日：1973-04-03
申请号：US3724573D
申请日：1972-05-09
Applicant: WIRTH GALLO & CO
Inventor： SANER K
Abstract: Two pretensioned vibrating strings are respectively stressed and stress-relieved by a force to be measured, said force being applied through an adjusting member by which the angle of force application can be varied to compensate initial errors of the apparatus.
Abstract translation: 两个预张紧的振弦通过被测量的力分别受应力和应力消除，所述力通过调节构件施加，通过该调节构件施加的角度可以改变以补偿装置的初始误差。
-
公开(公告)号：US3600614A
公开(公告)日：1971-08-17
申请号：US3600614D
申请日：1969-11-10
Applicant: SOLARTRON ELECTRONIC GROUP
Inventor： CURTIS IAN F M
CPC classification number: G01L1/106
Abstract: A force transducer in which a strut is fixed at one end and has the other end coupled to an arrangement for applying force in the axial direction of the strut. In operation, transverse vibration of a length of the strut is maintained by feedback from a pickup coil to a drive coil through an amplifier, the frequency being a measure of the axial force to which the strut is subjected. Adjacent the said other end a node is formed by a clamp gripping a portion of the strut. This clamp includes rolling bearings arranged to permit axial movement of the gripped portion of the strut.
-
公开(公告)号：US3423999A
公开(公告)日：1969-01-28
申请号：US3423999D
申请日：1965-10-20
Applicant: WIRTH GALLO & CO
Inventor： WIRTH ARMIN , WIRTH JOHANNES , GALLO MARIO
CPC classification number: G01L1/106
-
公开(公告)号：US20240288322A1
公开(公告)日：2024-08-29
申请号：US18572105
申请日：2022-06-21
Applicant: Digi Sens AG
Inventor： Ingo Leonard
Abstract: The invention relates to a vibrating bridge for a vibrating-wire sensor, comprising opposing clamping points for connecting the vibrating bridge to the vibrating-wire sensor and comprising multiple vibrators which are provided between the clamping points and which are mechanically connected to the securing points and can be tensioned via the securing points, wherein one of the vibrators is free of a vibration exciter or vibration detector, and another vibrator is provided with a vibration exciter.
-
公开(公告)号：US11982648B2
公开(公告)日：2024-05-14
申请号：US17107646
申请日：2020-11-30
Applicant: Etegent Technologies, Ltd.
Inventor： Oleg Lobkis , Richard A. Roth , Christopher G. Larsen , Stuart J. Shelley
IPC: G01L11/06 , F01D17/08 , G01H11/00 , G01L1/10 , G01L1/25 , G01N29/07 , G01N29/12 , G01N29/24 , G01N29/32 , G01P15/097 , G01P15/10 , F01D17/02
CPC classification number: G01N29/326 , F01D17/08 , F01D17/085 , G01H11/00 , G01L1/10 , G01L1/255 , G01L11/06 , G01N29/07 , G01N29/12 , G01N29/2462 , G01P15/10 , F01D17/02 , F05D2220/32 , G01L1/106 , G01N2291/0215 , G01N2291/02827 , G01N2291/02872 , G01N2291/02881 , G01N2291/0421 , G01N2291/0422 , G01N2291/0426 , G01N2291/0427 , G01P15/097
Abstract: An environmental condition may be measured with a sensor (10) including a wire (20) having an ultrasonic signal transmission characteristic that varies in response to the environmental condition by sensing ultrasonic energy propagated through the wire using multiple types of propagation, and separating an effect of temperature on the wire from an effect of strain on the wire using the sensed ultrasonic energy propagated through the wire using the multiple types of propagation. A positive feedback loop may be used to excite the wire such that strain in the wire is based upon a sensed resonant frequency, while a square wave with a controlled duty cycle may be used to excite the wire at multiple excitation frequencies. A phase matched cone (200, 210) may be used to couple ultrasonic energy between a waveguide wire (202, 212) and a transducer (204, 214).
-
-
-
-
-
-
-
-
-
Search Results
113
records
(took 0.013 seconds)
