• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An instrument for determining the complex mechanical response of samples incorporates two parallel sample arms each pivotally mounted at their central portion by flexure pivots of precisely known spring constants. The sample is mounted on one end of each. An electromechanical driver acts on the other end of one arm to maintain the arms and sample in mechanical oscillation about the pivots. A displacement transducer senses the mechanical motion. A feedback amplifier between the displacement transducer and the driver maintains the oscillation at a constant amplitude and at a resonant frequency determined primarily by the sample. With this arrangement the driver and displacement sensor are removed from the sample and its usual thermal chamber. This improves the stability of the instrument. At the same time the arms are dynamically balanced about the pivots and hence are relatively insensitive to vibrational upset.
    公开号:SU902678A3
    申请号:SU772455463
    申请日:1977-02-25
    公开日:1982-01-30
    发明作者:Ву Ликон；Д.Макги Джон
    申请人:Е.И.Дюпон Де Немур Энд Компани (Фирма)；
    IPC主号:
    专利说明:

    The device consists of a master 1 and a slave 2 beams with vertical axes 3 and 4, with respect to which the oscillatory movement of the bars takes place. Test beams 5 are fastened to the beams with the help of grips 6 and 7. The driving beam 1 interacts with a loading drive made in the form of an electric motor 8 and a displacement sensor 9 connected to the loading drive through a feedback amplifier 10. The device contains elastic hinges 11 and 12 connecting the beams to the body. The device works as follows. After installation of sample 5 in grips 6 and 7, the driven end of the driving beam T is driven into oscillatory motion about axis 3 with a frequency equal to the resonant frequency of the entire system using mechanical shifting. data from the electric motor 8. Due to the connection of the beams through the sample and the presence of a hinge with the body, the beam 2 oscillates about axis 4, in-phase with the oscillations of the driving beam 1. The movement of the driving beam 1 is detected by an alternating sensor 9 current, which is a function of the natural frequency of the system, and supplies it to the amplifier 10. A feedback from where the amplified signal is fed to the electric motor 8 and the latter generates an output signal that coincides in phase with the angular oscillations of the driving beam 1. In this case, the signal from the reverse amplifier. This corresponds to the mechanical energy required to maintain a constant amplitude of oscillation, and this signal is a measure of the energy loss caused by the attenuation of the oscillations of the following sample. Thus, when testing in a sample, cyclical stresses of practically pure shear are realized and an accurate measurement of the dynamic modulus and mechanical hysteresis of the test material is performed. Formula of the invention A device for analyzing the dynamic properties of a sample, comprising a frame, two parallel beams with grips for the sample, a displacement sensor associated with one of the beams and with a loading drive, so that In order to improve accuracy, the beams are fixed to the body by means of elastic hinges located in the central part of the beams, and the drive is connected with the end of the beam opposite to its end with the grip for the sample. Sources of information taken into account in the examination 1. US patent No. 3501952, cl. 73-15.6, published. 1970. 2. Patent CU1A No. 3751977, l. 73-15.6. publish 1973 (prototype).
    权利要求:
    Claims (1)
    [1]
    Claim
    A device for analyzing the dynamic properties of a sample, comprising a housing, two parallel beams with grippers for the sample, a displacement sensor associated with one of the beams and with a loading drive, which should be done in order to to increase accuracy, the beams are fixed on the housing using elastic hinges located in the central part of the beams, and the drive is connected to the beam end opposite to its end with a grip for the sample.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU902678A3|1982-01-30|Device for analysis of dynamic properties of sample
    KR900008300B1|1990-11-12|Angular velocity sensor
    EP0244086A2|1987-11-04|Resonator device
    US20100329080A1|2010-12-30|Sensor function for controlling at a variable transmission frequency for the purpose of detecting contamination
    US5303578A|1994-04-19|Rheometer
    US4862735A|1989-09-05|Microviscometer
    US4802364A|1989-02-07|Angular rate sensor
    SU682796A1|1979-08-30|Apparatus for the determination of shear viscosity and elasticity of media
    USRE34006E|1992-07-28|Angular rate sensor
    SU693192A1|1979-10-25|Method of determining thermal coefficient of linear expansion of solid bodies
    RU2029919C1|1995-02-27|Device for measuring fluid level
    USRE29288E|1977-07-05|Material analyzing apparatus and method
    SU964514A1|1982-10-07|Dynamic pendulum device for measuring friction in bearings
    SU667833A2|1979-06-15|Compensation-type string displacement pickup
    SU1654729A1|1991-06-07|Method for controlling piezoelectric element
    SU1144006A1|1985-03-07|Planimeter
    SU1401294A1|1988-06-07|Force cell
    Chiba et al.2000|Temperature self-compensated lithium tantalate piezoelectric gyroscope for higher stability
    RU2042942C1|1995-08-27|Electroacoustic hardness gauge
    SU1763944A1|1992-09-23|Torsion pendulum
    RU2045024C1|1995-09-27|Hardness tester
    SU1553909A1|1990-03-30|Graduating device for acceleration piezoelectric transducer
    CN108827804A|2018-11-16|A kind of resonant mode fatigue tester dynamic load error online compensation method
    JP3336902B2|2002-10-21|Viscoelasticity measuring device
    SU1276927A1|1986-12-15|Force-measuring transducer
    同族专利:
    公开号 | 公开日
    DK149829C|1987-02-23|
    CA1070138A|1980-01-22|
    US4034602A|1977-07-12|
    DE2659692C3|1978-10-05|
    NL173677B|1983-09-16|
    DK83577A|1977-08-28|
    IT1075811B|1985-04-22|
    IE44621L|1977-08-27|
    FR2342500B1|1980-01-11|
    BE851819A|1977-08-25|
    LU76857A1|1977-09-12|
    DE2659692B2|1978-02-16|
    DK149829B|1986-10-06|
    NL173677C|1984-02-16|
    GB1578855A|1980-11-12|
    JPS52104989A|1977-09-02|
    IE44621B1|1982-01-27|
    FR2342500A1|1977-09-23|
    DE2659692A1|1977-09-01|
    NL7702071A|1977-08-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE540805C|1929-04-07|1931-12-30|Versuchsanstalt Fuer Luftfahrt|Continuous bending machine for sheet metal|
    US3295364A|1964-01-30|1967-01-03|Douglas Aircraft Co Inc|Computing accelerometer|
    US3324714A|1965-03-10|1967-06-13|Albert B Simon|Flexure stiffness testing machine for ultra-thin sheets|
    US3751977A|1972-04-19|1973-08-14|Chem Instr Corp|Material analyzing apparatus|FR2373048B1|1976-12-06|1980-02-08|Aerospatiale|
    US4170141A|1978-02-24|1979-10-09|E. I. Du Pont De Nemours And Company|Method and apparatus for measuring the loss modulus of materials|
    US4166381A|1978-02-24|1979-09-04|E. I. Du Pont De Nemours And Company|Apparatus for determining the viscosity of fluids|
    FR2435029B1|1978-08-31|1981-09-11|Oreal|
    US4295374A|1979-09-10|1981-10-20|E. I. Du Pont De Nemours And Company|Specimen grips for dynamic mechanical analyzer|
    US4720623A|1986-05-01|1988-01-19|E. I. Du Pont De Nemours And Company|Power control device for a resistance heater in an oven|
    US5003811A|1989-04-28|1991-04-02|Cubic Defense Systems|Shock testing apparatus|
    US5245876A|1992-01-08|1993-09-21|The United States Of America As Represented By The Secretary Of The Air Force|Dual beam complex modulus apparatus|
    US5710426A|1996-03-01|1998-01-20|Ta Instruments, Inc.|Dynamic and thermal mechanical analyzer having an optical encoder with diffraction grating and a linear permanent magnet motor|
    EP1126269B1|2000-02-03|2008-03-26|Mettler-Toledo AG|Device for dynamic mechanical sample analysis|
    US7059198B2|2004-08-17|2006-06-13|Amitkumar N. Dharia|Apparatus to determine ability of plastic material to be shaped by thermoforming process|
    US9194783B2|2012-08-23|2015-11-24|Ta Instruments-Waters L.L.C.|Endosseous dental implant loading fixture|
    US9933249B2|2013-12-16|2018-04-03|Waters Technologies Corporation|Dynamic mechanical analyzer and sample fixtures for a dynamic mechanical analyzer|
    CN110455741A|2019-08-19|2019-11-15|广东工业大学|A kind of system for obtaining the real-time infrared spectroscopy in vibration test|
    WO2021077449A1|2019-10-24|2021-04-29|东北大学|Integrated tester for shock absorption, noise reduction and impact resistance of composite materials and test method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/662,269|US4034602A|1976-02-27|1976-02-27|Dynamic mechanical analyzer|
    [返回顶部]