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Hierarchically reconstructed NURBS curve interpolator and configuration method thereof

A kind of curve interpolation and interpolation technology, applied in the direction of instruments, simulators, computer control, etc., can solve the problem of not having free curve interpolation ability, can not be configured on site, etc., to improve flexibility and adaptability, improve interpolation Accuracy and free-form machining capabilities, the effect of reducing time and technical requirements

Inactive Publication Date: 2011-08-03
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] One of the purposes of the present invention is to provide a highly stable and reliable interpolator for the problem that most of the existing interpolators do not have free curve interpolation capabilities, or have free curve interpolation capabilities but cannot be configured on site. A NURBS curve interpolator for layer reconstruction, the second purpose of the present invention is to provide a NURBS curve interpolation configuration method with free curve interpolation capability and capable of realizing layered reconstruction of on-site configuration

Method used

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  • Hierarchically reconstructed NURBS curve interpolator and configuration method thereof
  • Hierarchically reconstructed NURBS curve interpolator and configuration method thereof
  • Hierarchically reconstructed NURBS curve interpolator and configuration method thereof

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Embodiment 1

[0049] Embodiment 1: a kind of NURBS curve interpolator of hierarchical reconstruction of the present invention, such as figure 1 As shown, adopt FPGA chip and IP core, comprise physical layer, data layer and application layer, described physical layer is made up of microprocessor, interrupt management, timer, PLB bus, serial port IP core, IP interface, interface control module , manual mode module, fine interpolation module and feedback signal measurement module, each module in the physical layer is connected through the PLB bus, the microprocessor exchanges data with the off-chip SRAM through the local bus, and reads the interpolation of the external FLASH through the PLB bus The controller algorithm program is executed internally, and the manual mode module receives external MPG and emergency stop signals; the data layer includes a host access buffer and an interpolation feedback register group, the host access buffer is a dual-port RAM, and one end is controlled through the...

Embodiment 2

[0059] Embodiment 2: The NURBS curve interpolator of the present invention is applied to a numerical control system. It first obtains on-site configuration information through the man-machine interface module, completes the basic configuration of the interpolator, and then writes the NURBS curve to be interpolated by the numerical control controller The parameter information and interpolation command are stored in the host access buffer and related registers; the microprocessor reads the interpolation information, sends it to the coefficient matrix generation module and the forward-looking interpolation module, and updates the control module and precision interpolation module through the interpolation table. The interpolation module generates pulse signals to drive the servo motors of each axis of the CNC system.

[0060] like Figure 7 As shown, the configuration method of the NURBS curve interpolator provided by the present invention realizes the configuration of the NURBS c...

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Abstract

The invention relates to a hierarchically reconstructed non-uniform rational B-spline (NURBS) curve interpolator and a configuration method thereof. A field programmable gate array (FPGA) chip and an internet protocol (IP) nuclear technology are adopted in the interpolator, and the interpolator comprises a physical layer, a data layer and an application layer. The physical layer consists of a microprocessor, an interrupt manager, a timer, a pipeline burst cache (PLB) bus, a serial port IP nucleus, an IP interface, an interface control module, a manual mode module, a fine interpolation module and a feedback signal measurement module; the data layer contains a host access buffer area and an interpolation feedback register set; the data layer stores NURBS curve parameters written in from a numerical controller, processing commands and axis displacement error calculated by the feedback signal measurement module; and the application layer contains a human-machine interface module and a rough interpolation module, and the application layer receives field configuration information and realizes NURBS curve rough interpolation. Field configuration is easily realized by a three-layer control structure, time and technical requirements required by reconfiguration of the interpolator are reduced, stability and reliability are improved, and the processing capacity of a numerical control system is expanded.

Description

technical field [0001] The invention relates to a computer numerical control system interpolation control technology, in particular to a layered reconstruction NURBS curve interpolator and a configuration method thereof. Background technique [0002] Free-form curve machining has always been a key issue in manufacturing engineering research. With the development of the national economy, aviation, automobile, shipbuilding and other manufacturing industries have put forward higher requirements for the complex curve processing ability and processing quality of the CNC system. At present, the support for free-form curve processing has become one of the measurement standards for high-end CNC systems. [0003] To effectively solve free-form curve machining, the first step is to realize the development of complex curve interpolator. However, most domestic CNC systems can only provide linear and circular interpolation, and have less support for free-form curve interpolation. As t...

Claims

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Application Information

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IPC IPC(8): G05B19/41
Inventor 倪效勇张红剑王典洪
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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