公开(公告)号：US4887471A

公开(公告)日：1989-12-19

申请号：US230995

申请日：1988-08-11

Applicant: Pavel Kolavcic ,  Jarl Sobel ,  Lars rnholmer

Inventor： Pavel Kolavcic ,  Jarl Sobel ,  Lars rnholmer

IPC: G01D3/036 ,  G01L1/12

CPC classification number: G01D3/0365 ,  G01L1/125 ,  G01L1/127 ,  Y10S73/02

Abstract: A magnetoelastic force transducer which is compensated for sensitivity drift is provided with a measuring transducer and a reference transducer (1) of the same material. In its simplest form the reference transducer may consist of a toroid. The two transducers are arranged in good thermal contact with one another. The reference transducer is arranged with a winding (2) for excitation with a current which at each moment is proportional to the supply current of the measuring transducer, and with a winding (3) for delivering a reference signal (U.sub.r) proportional to its magnetic flux. The output signal of the reference transducer is rectified in a phase-sensitive rectifier, the output signal of which is compared with a constant reference voltage. The deviation controls the phase position of the control voltage of the rectifier in such a way that the output signal of the rectifier is caused to correspond to the reference voltage. The output signal of the measuring transducer is rectrified in a phase-sensitive rectifier, which is controlled by said control voltage and the output signal of which constitutes the temperature-compensated measured signal.

Abstract translation: 补偿灵敏度漂移的磁弹性力传感器具有相同材料的测量传感器和参考传感器（1）。 在其最简单的形式中，参考换能器可由环形线构成。 两个换能器彼此热接触地布置良好。 参考传感器布置有用于激励的绕组（2），其中电流在每个时刻与测量换能器的电源电流成比例，并且具有用于传递与其磁性成比例的参考信号（Ur）的绕组（3） 助焊剂 参考传感器的输出信号在相敏整流器中整流，其输出信号与恒定参考电压进行比较。 偏差控制整流器的控制电压的相位位置，使整流器的输出信号与参考电压相对应。 测量传感器的输出信号在相敏整流器中进行了整流，由相应的控制电压控制，其输出信号构成温度补偿测量信号。

公开(公告)号：US4193294A

公开(公告)日：1980-03-18

申请号：US863531

申请日：1977-12-22

Applicant: Lennart Forslund ,  Stig Jordinger ,  Pavel Kolavcic

Inventor： Lennart Forslund ,  Stig Jordinger ,  Pavel Kolavcic

IPC: G01L1/12

CPC classification number: G01L1/127 ,  G01L1/125 ,  Y10S73/02

Abstract: 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.

Abstract translation: 测量磁弹性换能器的力包括具有孔的磁致伸缩材料芯，其中布置有激励和测量绕组，并且其间形成有测量区域，其中磁动势的主要部分被消耗，并且其中应力由此确定 换能器的输出信号。 芯部还包括用于控制力通量的孔，其布置成使得一些测量区域部分基本上受到压缩应力，并且当力作用在换能器上时，其它测量区域部分基本上受到拉伸应力。 提供了用于以这样大的交流电激励换能器的装置，使得在预定负载范围内由所述压缩和拉伸应力产生的信号显示出与压缩应力的负号和拉伸应力的正号的线性偏差。 输出信号以这样的比例相加，使得信号的线性度的偏差彼此补偿。

公开(公告)号：US06561036B1

公开(公告)日：2003-05-13

申请号：US09674977

申请日：2000-12-27

Applicant: Pär Gustafsson ,  Pavel Kolavcic ,  Ulf Lifvenborg

Inventor： Pär Gustafsson ,  Pavel Kolavcic ,  Ulf Lifvenborg

IPC: G01L700

CPC classification number: G01L23/145 ,  G01L9/0026 ,  G01L19/04

Abstract: Pressure sensor for measurement of gas pressure in a cylinder of a combustion engine, including a tube shaped in cross section as an hourglass. In the axial direction the tube consists in part of a section connected to the cylinder and open to the cylinder, in part of a measuring section and in part of a final section the end of which is closed. The measuring section of the tube is shaped so that in the tubes axial direction two parallel measuring surfaces are established against which are two beams connected to force transferring yokes arranged to influence force measuring organs for the determination of the force with which the gas pressure influences the parallel measuring surfaces of the tube. In this pressure sensor and other embodiments the influences of temperature fluctuations and any shunting effects of the material of the measuring tube are reduced to a minimum.

Abstract translation: 用于测量内燃机的气缸中的气体压力的压力传感器，包括形成为沙漏的横截面的管。 在轴向方向上，管由连接到气缸的部分部分地连接到气缸，部分位于测量部分中，部分位于末端封闭的最后部分中。 管的测量部分成形为使得在管轴向方向上形成两个平行的测量表面，两个平行的测量表面是连接到力传递轭的两个梁，所述两个梁被布置成影响力测量器官，以确定气体压力影响的力 管的平行测量表面。 在该压力传感器和其它实施例中，将测量管的材料的温度波动和任何分流效应的影响减小到最小。