A three-dimensional space measuring device

Abstract

The invention discloses a three-dimensional space measuring device which comprises multiple magnetic field sensors, a magnetic field generator, a signal processing unit, a centralized control unit, a calculation device and a displayer. The magnetic field generator comprises multiple coils, an alternating magnetic field different in frequency is generated after the different coils are powered on through alternating current different in frequency, and the magnetic field sensors are used for converting the detected alternating magnetic field into an electric signal and transmitting the electric signal to the signal processing unit. The centralized control unit is used for comprehensively controlling the generation of the magnetic field of the coils and transmitting the signal to the calculation device, the calculation device calculates the three-dimensional positions and direction data of the magnetic field sensors through the magnetic field sensor signal which is transmitted by the centralized control unit and digitally converted through the signal processing unit, and the three-dimensional shape and position of a hose are displayed through the displayer. The three-dimensional directions of the one-dimensional magnetic field sensors are determined through the multi-frequency low-intensity magnetic field, and therefore the three-dimensional space measuring device has the advantages of being low in cost, small in size and the like.

Description

technical field [0001] The invention relates to a three-dimensional orientation measuring device, in particular to a measuring device for simultaneously measuring the orientation of a plurality of three-dimensional position sensors by using an electromagnetic method. Background technique [0002] Near-field magnetic fields have been used for 3D orientation detection for more than four decades. In this detection system, the magnetic field generator utilizes multiple electromagnetic coils to generate electromagnetic fields in different positions and directions. A magnetic field sensor can detect this magnetic field and can establish a system of equations for the measured value and the relative orientation of the magnetic field sensor. By numerically solving this system of equations, the orientation of the sensor relative to the magnetic field generator can be calculated. However, the existing systems of this type, especially some early systems, rely heavily on complex analog...

AI Technical Summary

Problems solved by technology

However, existing systems of this type, especially some early systems, rely heavily on complex analog signal filtering and tracking, resulting in high system costs and are not suitable for simultaneous positioning of multiple sensors

Some systems use multi-dimensional magnetic field sensors (that is, magnetic field sensors that are sensitive to two or more directions), such sensors are bulky and expensive

There are also systems that limit the sensor to movement in one or a limited number of directions

In addition, the existing system uses a time-sharing magnetic field to drive each coil of the magnetic field generator, which makes the measurement speed of the system relatively low

Images