A spherical three-dimensional force measuring piezomagnetic sensor and three-dimensional force measuring method

Abstract

The invention discloses a spherical three-dimensional force-measuring piezomagnetic sensor and a three-dimensional force measuring method thereof, comprising: a force-measuring mechanism, a signal excitation circuit and a signal conditioning circuit; The force transmission element connected in the direction and the piezomagnetic element connected with the force transmission element; the piezomagnetic element receives the external force exerted on the spherical shell through the force transmission element; after the piezomagnetic element receives the external force, the signal excitation circuit transmits the excitation signal to the pressure A magnetic element, so that the piezomagnetic element converts the external force into a non-zero induced voltage, and transmits the induced voltage to the signal conditioning circuit; the signal conditioning circuit performs signal compensation, output decoupling, and component force synthesis on the induced voltage to obtain the external force value and force components in each direction. It can accurately detect the load force in all directions, and measure the bias degree of the magnetic field on the basis of the same force and deformation at the same time, so as to meet the complex working conditions in practical applications.

Description

technical field [0001] The invention relates to the technical field of force measurement, in particular to a spherical three-dimensional force measuring piezomagnetic sensor and a three-dimensional force measuring method thereof. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Force sensors are widely used in construction machinery, aerospace, construction industry, automation and other fields, and there are many types, such as resistance strain gauge, semiconductor strain gauge, piezoresistive, piezoelectric and so on. Among them, compared with the strain gauge force sensor, the piezomagnetic force sensor has the advantages of strong bearing capacity, large output power, good anti-interference ability, and can maintain a good working condition under harsh environmental conditions. [0004] Piezomagnetic sensor is a kind of force and elec...

AI Technical Summary

Problems solved by technology

[0006] (1) When the existing piezomagnetic sensor is working, the excitation core can only detect the force in two dimensions, which cannot fully reflect the actual external force;

[0007] (2) When measuring the external force value, the existing piezomagnetic sensor will be affected by the working environment, which will cause the excitation voltage to fluctuate and cause measurement errors;

[0008] (3) Due to factors such as different measurement conditions or different applied external forces, the magnetic permeability changes are different, so the output induced voltage is also different. If a unified detection range is used, it is inevitable that the small induced voltage cannot be accurately obtained. value;

[0009] (4) Due to the mutual influence between the sensor structure and the magnetic fields in different directions, the output signal of the piezomagnetic sensor in each dimension will be affected by other dimensions when the piezomagnetic element measures the force component in the actual work, then The values ​​measured in this dimension are not all the components of external forces in this dimension, and there is a problem of coupling errors between multiple dimensions

Images