• 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:
    A force measuring magnetoelastic transducer includes a core of magnetostrictive material with apertures, in which excitation and measuring windings are arranged, and between which a measuring zone is formed, in which the dominating part of the magnetomotive force is consumed and in which the stress therefore determines the output signal of the transducer. The core further includes apertures for controlling the force flux, which are so arranged that some measuring zone portions are substantially subjected to compressive stress and other measuring zone portions are substantially subjected to tensile stress when a force is acting on the transducer. Means are provided for exciting the transducer with an alternating current of such magnitude that the signals generated by said compressive and tensile stresses, within a predetermined range of load, show deviations from linearity with negative sign for compressive stress and positive sign for tensile stress. The output signals are summed in such proportions that the deviations from linearity of the signals compensate each other.
    公开号:SU1052173A3
    申请号:SU772558154
    申请日:1977-12-27
    公开日:1983-10-30
    发明作者:Форслунд Леннарт；Йордингер Стиг；Колавчич Павел
    申请人:Асеа Актиеболаг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a magnet. Elastic sensors can be used in a measuring technician. A magnetoelastic sensor containing a magnetic core with open holes C is known. The device eliminates transverse voltages on sensitive elements, but has a relatively low linearity of the output characteristic. A known magnetoelastic sensor comprising a multi-sectional magneto wire with slotted openings for separating sections and openings for adjusting mechanical stresses and spreading windings C23. The disadvantage of this sensor. The measurement accuracy is low due to the nonlinearity of the output characteristic and temperature error. The purpose of the invention is to increase the linearity of the output characteristic. and. the exclusion of temperature error. The goal is achieved by the fact that in a magnetoelastic sensor containing a multisection magnet wire with slotted holes for separating sections and holes for adjusting mechanical stresses and placing windings, the hour of the slotted holes is located along one axis, and the other part is located along the other axis, perpendicular to the right, with the windings of sections with mutually perpendicular slot openings being connected in a differential circuit. The shape of the magnetic cores, the size and location of the windings are chosen so that the characteristics for the compression zone and the extension zone have the same magnitude and opposite signs of deviation from the linear characteristic. The addition of signals from compression and expansion zones causes the deviations of these signals from the linear characteristic to overwhelm each other. FIG. Figures 1 and 2 show a magnetoelastic sensor that is subjected to a compressive load applied in the normal operating direction and a tensile load applied in the perpendicular direction of the pHIMOM; in fig. 3 and 4, the output characteristics, respectively, shown in FIG. 1 and 2 types of load; in fig. 5, a magnetoelastic sensor modified in such a way that the stress distribution depicted in FIG. 1 and 2 are combined in the same measurement zone; in fig. b - magnetoelastic sensor, which is influenced by the force F and which is made with two zones - compression and growth same /) and; in fig. .7-10 - possible variants of magnetic circuits for magnetoelastic sensors having one compression zone and one expansion zone; in fig. 11 is a magnetic core for a sensor having two compression zones and one stretching zone; in fig. 12 shows a magnetic core for a sensor having one compression zone and two stretch zones. The compressive force F is applied to the magnetic circuit 1. The excitation winding 6 and measuring winding 7, connected to the signal processing unit 8, are respectively placed in the openings 2-5. In order to compress in zone A only the compressive stresses, two vertical slots 9 and 10 are placed on its sides. Holes 11 and 12 serve to unload the Stresses. Thus, a significant part of the compressive force F is retracted from the measuring zone A, which leads to a significant expansion of the working range of the sensor. Holes 13 and 14 are used to place a winding in them, which compensates for errors in the sensor due to a hysteresis phenomenon. Similarly, for stretching, the zone is provided with horizontally placed slits 15 and 16. By changing the size, shape and position of the discharge openings 11 and 12 with respect to the measuring zone, as well as by appropriate selection of the geometric shape of the magnetic core, the necessary absolute values can be selected and the mutual relationship between the main voltages that act in the measuring zones. According to one of the possible options (Fig. 6), the external shape of the sensor is determined by the recesses 17 of different shapes. rmy, size and location. The sensor magnetic circuit (Fig. 12) can be suspended between two fixed supports 18. When the holes 19 and the slots connecting them are cracked, the sensor core is divided into a central compressible part and two external expandable parts, all three parts being parallel to each other. Air- /.
    The force is transmitted to the sensor through the central compressible part of the magnetic circuit to the cross member 20, and then to two flexible parts and through them to the fixed support 18 ,.
    Thus, the simultaneous creation and measurement of compressive and expanding forces makes it possible to obtain an output signal with higher linearity.
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    权利要求:
    Claims (1)
    [1]
    MAGNETOELASTIC SENSOR, containing a multi-section magnetic core with slotted holes for separating sections and holes for regulating the Mechanical, voltage and placement of windings, characterized in that, in order to increase the linearity of the output characteristic and eliminate temperature error, some of the holes are located along one axis and the other part located along another axis perpendicular to the first, the winding sections' with mutually perpendicular schelevymi'otverstiyami p enabled by differential scheme e. s Xia>
    1052173 '
    类似技术:
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    GB1471172A|1977-04-21|Weighing devices
    US3034346A|1962-05-15|Compensation of strain gauge transducer non-linearity
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    US3664187A|1972-05-23|Transducer for measuring mechanical forces
    US2788491A|1957-04-09|Expanded scale voltmeter
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    US2632149A|1953-03-17|Electric strain gauge
    US3008793A|1961-11-14|Variable coupling electromagnetic
    SU580469A2|1977-11-15|Transformer-type pressure sensor
    SU979919A1|1982-12-07|Converter of pressure to electric signal
    SU881628A1|1981-11-15|Electrostatic field pickup
    US3230777A|1966-01-25|Jerkmeter
    同族专利:
    公开号 | 公开日
    CA1117644A|1982-02-02|
    DE2756701A1|1978-06-29|
    DE2756701C2|1983-12-29|
    SE7614600L|1978-06-29|
    SE405766B|1978-12-27|
    US4193294A|1980-03-18|
    JPS5383776A|1978-07-24|
    GB1593800A|1981-07-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE740762C|1941-05-31|1943-10-28|Siemens Ag|Encoder for the measurement of tension, pressure, torque or thrust according to the differential method|
    DE955272C|1953-12-28|1957-01-03|Asea Ab|Device for measuring mechanical forces and their time derivatives|
    DE1122288B|1959-09-23|1962-01-18|Asea Ab|Measuring device for mechanical pressure forces|
    DE1215398B|1963-02-13|1966-04-28|Asea Ab|Measuring body for measuring mechanical forces|
    US3664187A|1970-06-03|1972-05-23|Saab Scania Ab|Transducer for measuring mechanical forces|
    SE376077B|1973-09-13|1975-05-05|Asea Ab|SE438051B|1980-03-19|1985-03-25|Asea Ab|PRESSURE SENSOR IN THE FIRST HAND INTENDED FOR DYNAMIC PRESSURE SEATING AS PRESSURE INDICATION OF DIESEL ENGINES|
    DE3369884D1|1982-03-24|1987-04-02|Asea Ab|Magnetoelastic force transducer|
    SE430541B|1982-03-24|1983-11-21|Asea Ab|TEMPERATURE COMPENSATED MAGNETOELASTIC POWER METER|
    SE455886B|1986-12-15|1988-08-15|Asea Ab|MAGNETOELASTIC POWER|
    SE457116B|1987-04-30|1988-11-28|Asea Ab|MAGNETOELASTIC POWER|
    JPH0754273B2|1987-12-26|1995-06-07|大同特殊鋼株式会社|Torxense|
    SE470196B|1992-05-05|1993-11-29|Asea Brown Boveri|Three-dimensional magnetoelastic power sensor|
    JP3163965B2|1995-09-27|2001-05-08|三菱自動車工業株式会社|Structure of magnetostrictive sensor|
    SE0501957L|2005-09-05|2006-11-07|Abb Ab|Device for measuring the pressure of a gas and its use|
    CN102519632B|2011-11-02|2013-10-23|北京金自天正智能控制股份有限公司|Four-hole site coil integral force transducer based on principle of piezomagnetic effect|
    EP2789998B1|2013-04-08|2015-06-10|Bayern Engineering GmbH & Co. KG|Transport rail system with weighing means|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE7614600A|SE405766B|1976-12-28|1976-12-28|POWERFUL MAGNETOELASTIC SENSOR|
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