COMPUTING DEVICE AND MEASUREMENT CONTROL METHOD

• US 20140240718A1
• Filed: 12/18/2013
• Published: 08/28/2014
• Est. Priority Date: 02/28/2013
• Status: Active Grant

• Current Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Inventors: CHANG, CHIH-KUANG, JIANG, LI, YUAN, ZHONG-KUI, XUE, XIAO-GUANG, LIU, JIAN-HUA, WU, WEI-WEN
• Granted Patent: US 8,913,252 B2
• Time in Patent Office: Days
• US Class Current: 356/614
• CPC Class Codes: G01B 11/005 coordinate measuring machines
• CPC Class Codes: G01B 11/14 for measuring distance or clearance between spaced objects or spaced apertures G01B11/26 takes precedence; rangefinders G01C3/00
• CPC Class Codes: G01B 21/047 Accessories, e.g. for positioning, for tool-setting, for measuring probes
• CPC Class Codes: G01B 2210/50 Using chromatic effects to achieve wavelength-dependent depth resolution

Abstract

A computing device is electronically connected to a measurement machine and a controller. The controller is connected to a sensor installed on the measurement machine. The computing device receives spectral signal data sent from the controller and generates an intensity distribution diagram according to the spectral signal data. Furthermore, the computing device sends control commands to the measurement machine, to adjust a position of the sensor on the measurement machine according to variation of a peak value of a wave in the intensity distribution diagram.

Claims

1. A measurement control method being executed by a processor of a computing device, the computing device being electronically connected to a controller and a measurement machine having an X axis, a Y axis, and a Z axis, the controller being electronically connected to a sensor installed on the Z axis of the measurement machine, the method comprising:

receiving coordinate data of a measurement point on an object and a minimum intensity threshold of spectral signals capable of being detected by the sensor set by a user;

generating a driving command according to the coordinate data of the measurement point, and sending the driving command to the measurement machine, to drive the sensor to move to a position on top of the measurement point on the object;

receiving spectral signal data sent from the controller, which is retrieved from the spectral signals reflected from the object by the controller;

determining an effective detection range of the sensor according to the spectral signal data;

drawing an intensity distribution diagram according to the spectral signal data;

determining whether a peak value of a wave in the intensity distribution diagram is less than the minimum intensity threshold; and

determining that the measurement point falls outside the effective detection range of the sensor in response to determining the peak value of the wave in the intensity distribution diagram is less than the minimum intensity threshold, and sending a control command to the measurement machine, to adjust the position of the sensor on the Z axis of the measurement machine.

2. The method as claimed in claim 1, further comprising:

sending an adjustment command to the measurement machine, to control the sensor to move on the Z axis of the measurement machine, and determining an optimal position of the sensor on the Z axis of the measurement machine according to variation of the peak value of the wave in the intensity distribution diagram during the movement of the sensor.

3. The method as claimed in claim 1, wherein:

the controller emits a beam of white light and transmits the white light to the sensor; and

the sensor separates the white light into a plurality of homochromy lights, projects the homochromy lights onto the object, receives spectral signals reflected from the object, and sends the spectral signals to the controller.

4. The method as claimed in claim 1, wherein the spectral signal data comprises a wavelength and an intensity value of each spectral signal.

5. The method as claimed in claim 1, wherein the effective detection range is a wavelength range determined according to a maximum wavelength of the spectral signals and a minimum wavelength of the spectral signals.

6. The method as claimed in claim 1, further comprising:

displaying the intensity distribution diagram on a display device.

7. The method as claimed in claim 1, further comprising:

outputting position data of the sensor and the peak value of the wave in the intensity distribution diagram on a display device during the movement of the sensor.

8. A computing device being electronically connected to connected to a controller and a measurement machine having an X axis, a Y axis, and a Z axis, the controller being electronically connected to a sensor installed on the Z axis of the measurement machine, the computing device comprising:

a processor; and

a storage device that stores one or more programs, when executed by the processor, causing the processor to perform operations of;

receiving coordinate data of a measurement point on an object and a minimum intensity threshold of spectral signals capable of being detected by the sensor set by a user;

generating a driving command according to the coordinate data of the measurement point, and sending the driving command to the measurement machine, to drive the sensor to move to a position on top of the measurement point on the object;

receiving spectral signal data sent from the controller, which is retrieved from the spectral signals reflected from the object by the controller;

determining an effective detection range of the sensor according to the spectral signal data;

drawing an intensity distribution diagram according to the spectral signal data;

determining whether a peak value of a wave in the intensity distribution diagram is less than the minimum intensity threshold; and

determining that the measurement point falls outside the effective detection range of the sensor in response to determining the peak value of the wave in the intensity distribution diagram is less than the minimum intensity threshold, and sending a control command to the measurement machine, to adjust the position of the sensor on the Z axis of the measurement machine.

9. The computing device as claimed in claim 8, wherein the operations further comprise:

sending an adjustment command to the measurement machine, to control the sensor to move on the Z axis of the measurement machine, and determining an optimal position of the sensor according to variation of the peak value of the wave in the intensity distribution diagram during the movement of the sensor.

10. The computing device as claimed in claim 8, wherein:

the controller emits a beam of white light and transmits the white light to the sensor; and

the sensor separates the white light into a plurality of homochromy lights, projects the homochromy lights onto the object, receives spectral signals reflected from the object, and sends the spectral signals to the controller.

11. The computing device as claimed in claim 8, wherein the spectral signal data comprises a wavelength and an intensity value of each spectral signal.

12. The computing device as claimed in claim 8, wherein the effective detection range is a wavelength range determined according to a maximum wavelength of the spectral signals and a minimum wavelength of the spectral signals.

13. The computing device as claimed in claim 8, wherein the operations further comprise:

outputting position data of the sensor and the peak value of the wave in the intensity distribution diagram on a display device during the movement of the sensor.

14. A non-transitory computer-readable storage medium having stored thereon instructions that causes a processor of a computing device to perform operations of:

receiving coordinate data of a measurement point on an object and a minimum intensity threshold of spectral signals capable of being detected by the sensor set by a user;

generating a driving command according to the coordinate data of the measurement point, and sending the driving command to the measurement machine, to drive the sensor to move to a position on top of the measurement point on the object;

receiving spectral signal data sent from the controller, which is retrieved from the spectral signals reflected from the object by the controller;

determining an effective detection range of the sensor according to the spectral signal data;

drawing an intensity distribution diagram according to the spectral signal data;

determining whether a peak value of a wave in the intensity distribution diagram is less than the minimum intensity threshold; and

determining that the measurement point falls outside the effective detection range of the sensor in response to determining the peak value of the wave in the intensity distribution diagram is less than the minimum intensity threshold, and sending a control command to the measurement machine, to adjust the position of the sensor on the Z axis of the measurement machine.

15. The non-transitory computer-readable storage medium as claimed in claim 14, wherein the operations further comprise:

sending an adjustment command to the measurement machine, to control the sensor to move on the Z axis of the measurement machine, and determining an optimal position of the sensor according to variation of the peak value of the wave in the intensity distribution diagram during the movement of the sensor.

16. The non-transitory computer-readable storage medium as claimed in claim 14, wherein:

the controller emits a beam of white light and transmits the white light to the sensor; and

the sensor separates the white light into a plurality of homochromy lights, projects the homochromy lights onto the object, receives spectral signals reflected from the object, and sends the spectral signals to the controller.

17. The non-transitory computer-readable storage medium as claimed in claim 14, wherein the spectral signal data comprises a wavelength and an intensity value of each spectral signal.

18. The non-transitory computer-readable storage medium as claimed in claim 14, wherein the effective detection range is a wavelength range determined according to a maximum wavelength of the spectral signals and a minimum wavelength of the spectral signals.

19. The non-transitory computer-readable storage medium as claimed in claim 14, wherein the operations further comprise:

outputting position data of the sensor and the peak value of the wave in the intensity distribution diagram on a display device during the movement of the sensor.