Time mark based three coordinate scanning data synchronous sampling system

Abstract

The time mark-based three-coordinate scanning data synchronous sampling system comprises a three-coordinate measuring machine, a control system, a laser head, a laser head controller and a computer system, the control system and the laser head controller are provided with sampling timers, when scanning measurement is performed, the control system sends sampling pulses to lock the coordinate data of the three-coordinate measuring machine and the time data of the sampling timer of the control system, and simultaneously lock the measurement data of the laser head and the time data of the sampling timer of the laser head controller, the sampling data of the control system and the laser head controller received by the computer system is the coordinate data of the three-coordinate measuring machine, the time data of the control system timer and the measurement data of the laser head and the time data of the laser head controller timer, the computer system selects the data with consistent time data as the scanning measurement data.

Description

Technical Field

[0001] This invention relates to the matching and processing of scanning measurement data from a coordinate measuring machine. Background Technology

[0002] In the prior art, when using a coordinate measuring machine to measure a part, the coordinate data sampling of the coordinate measuring machine and the scanning data sampling of the laser head are generally achieved through synchronous sampling pulses. The computer then combines the coordinate data and the scanning data to form the scanning sampling data of the part surface.

[0003] The problem with existing technology is that when using a coordinate measuring machine to measure parts, if the sampling pulses for coordinate data to the coordinate measuring machine are inconsistent with the sampling pulses for scanning data to the laser head when the system is interfered with, the computer's method of combining the coordinate data and scanning data one-to-one to form the part surface scanning sampling data will result in data matching errors. Summary of the Invention

[0004] This invention provides a time-stamped synchronous sampling system for coordinate measuring machines (CMMs), which can solve the problem of matching errors in scanning sampling data when the system is disturbed during the scanning process of a CMM.

[0005] To achieve the above objectives, the technical solution adopted by this invention is: a time-stamped coordinate measuring machine (CMM) for synchronous sampling of scanning data, comprising a CMM, a control system electrically connected to the CMM, a laser head mechanically connected to the CMM, a laser head controller electrically connected to the laser head and the control system, and a computer system electrically connected to the control system and the laser head controller. Both the control system and the laser head controller have sampling timers. The sampling timers of the control system and the laser head controller are time-aligned via a time synchronization command sent by the computer system. During scanning measurement, the control system sends sampling pulses in real time to lock the coordinate data of the CMM and the time-recorded data of the control system's timer. Simultaneously, the sampling pulses lock the measurement data of the laser head and the time-recorded data of the laser head controller's timer. The sampling data received by the computer system from the control system and the laser head controller includes the coordinate data of the CMM, the time-recorded data of the control system's timer, and the measurement data of the laser head and the time-recorded data of the laser head controller's timer. The computer system selects data with consistent time data as the scanning measurement data.

[0006] Due to the application of the above technical solution, the beneficial effects of this invention compared with the prior art are as follows: When using a time-stamped three-coordinate scanning data synchronous sampling system to measure parts, each set of sampling data received by the computer system from the control system and the laser head controller has its own time record data. The computer system selects data with consistent time record data from both for matching and discards inconsistent data. This can effectively eliminate interference data and obtain correct scanning measurement sampling data. Attached Figure Description

[0007] Appendix Figure 1 Here is a schematic diagram of the principle of the present invention:

[0008] The components include: 1. Coordinate measuring machine; 2. Control system; 3. Laser head; 4. Laser head controller; 5. Computer system. Detailed Implementation

[0009] See appendix Figure 1 A time-stamped coordinate measuring machine (CMM) scanning data synchronization sampling system includes a CMM, a control system electrically connected to the CMM, a laser head mechanically connected to the CMM, a laser head controller electrically connected to the laser head and the control system, and a computer system electrically connected to the control system and the laser head controller. Both the control system and the laser head controller have sampling timers. The sampling timers of the control system and the laser head controller are time-aligned via a time synchronization command sent by the computer system. During scanning measurement, the control system sends sampling pulses in real time to lock the coordinate data of the CMM and the time recording data of the control system's timer. Simultaneously, the sampling pulses lock the measurement data of the laser head and the time recording data of the laser head controller's timer. The computer system receives the sampling data from the control system and the laser head controller, which consists of the coordinate data of the CMM, the time recording data of the control system's timer, and the measurement data of the laser head and the time recording data of the laser head controller's timer. The computer system selects data with consistent time data as the scanning measurement data.

Claims

1. A time-stamped three-coordinate scanning data synchronous sampling system, comprising a three-coordinate measuring machine (1), a control system (2) electrically connected to the three-coordinate measuring machine (1), a laser head (3) mechanically connected to the three-coordinate measuring machine (1), a laser head controller (4) electrically connected to the laser head (3) and the control system (2), and a computer system (5) electrically connected to the control system (2) and the laser head controller (4), characterized in that: Both the control system (2) and the laser head controller (4) have sampling timers. The sampling timers of the control system (2) and the laser head controller (4) complete time alignment through the time synchronization command sent by the computer system (5). When performing scanning measurement, the control system (2) sends sampling pulses in real time to lock the coordinate data of the coordinate measuring machine (1) and the time recording data of the control system (2) timer. At the same time, the sampling pulse locks the measurement data of the laser head (3) and the time recording data of the laser head controller (4) timer. The sampling data received by the computer system (5) from the control system (2) and the laser head controller (4) are the coordinate data of the coordinate measuring machine (1), the time recording data of the control system (2) timer, the measurement data of the laser head (3), and the time recording data of the laser head controller (4) timer. The computer system (5) selects the data with consistent time data as the scanning measurement data.

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