TWI495838B - Image measuring apparatus - Google Patents

Description

Image measuring machine

The present invention relates to a measuring device, and more particularly to an image measuring machine.

The measurement principle of most conventional image measuring machines is: using a special light source (to prevent the object from being deformed by heating the light source, generally using an LED cold light source) to illuminate the surface of the object to be measured placed on the measuring platform, and then use optical The lens forms an image that magnifies the object to be measured by several tens to hundreds of times, and then uses an optical component such as a Charge Coupled Device (CCD) lens to capture and transfer the image of the product to be tested to the computer. Measurement programs or image processing techniques in the computer measure the overall size of the object being viewed or the size of a portion of the structure. However, when the shape of the object to be tested is irregular and not suitable for non-contact measurement, or when there is a structure on the object where light is difficult to enter (for example, a hole with a concave depth), the measurement accuracy of the conventional image measuring machine is greatly reduced. .

In view of the above, it is necessary to provide a highly accurate image measuring machine.

An image measuring machine includes a machine table, a measuring platform and a measuring moving part mounted on the measuring platform, the measuring platform is used for carrying an object to be tested, and the machine is mounted on the measuring moving part, the machine The platform, the measuring moving part and the measuring platform are connected by a mobile bridge structure, and the machine comprises an image measuring component and a contact measuring component, and the image measuring machine realizes image detection by the image measuring component, and borrows the object to be tested. Contact detection is performed by the object to be measured by the contact measuring component.

Compared with the prior art, the machine, the measuring moving part and the measuring platform of the image measuring machine of the invention adopt a moving bridge structure, and fully expand the measuring space, and the image measuring machine can realize non-contact type by not only the image measuring component. Image measurement, contact measurement can also be realized by contact measurement components, which effectively expands the application range of image measuring machine and ensures image measurement accuracy.

10‧‧‧ machine

11‧‧‧Image Measurement Components

13‧‧‧Contact measurement components

131‧‧‧ base

132‧‧‧ probe

133‧‧‧ sensor

135‧‧‧ converter

15‧‧‧Ontology

20‧‧‧Measurement of the mobile department

21‧‧‧ beam body

23‧‧‧Sliding section

30‧‧‧Measurement platform

31‧‧‧Chute

33‧‧‧Changer holder

50‧‧‧Measurement Control Department

51‧‧‧ machine support

53‧‧‧The whole machine movement department

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of an image measuring machine in accordance with a preferred embodiment of the present invention.

Figure 2 is an enlarged view of a portion II of the image measuring machine shown in Figure 1.

Figure 3 is a front elevational view of the image measuring machine of Figure 1.

Figure 4 is a rear elevational view of the image measuring machine of Figure 1.

The invention is further described in detail below with reference to the drawings and preferred embodiments.

Referring to FIGS. 1 to 4, the image measuring machine is mainly composed of a machine table 10, a measuring platform 30, and a measurement control unit 50. The measuring platform 10 and the measuring platform 30 are connected to a conventional host and display device (not shown). The measuring platform 30 is used to carry an object to be tested (not shown), and a measuring movement is fitted thereon. The unit 10 is mounted on the measuring and moving unit 20, and the machine 10, the measuring moving unit 20 and the measuring platform 30 adopt a moving bridge structure, and the machine 10 is provided with an image measuring component 11 and a contact measuring component 13, which The image measuring device measures the object carried on the measuring platform 30 by the image measuring component 11 or the contact measuring component 13 , and the measuring control unit 50 transmits the measured data to a conventional host and display device (not shown) to Calculate and display the measurement results.

The machine 10 is configured to measure the shape and size of the object to be measured, and includes an image measuring component 11 The measuring unit 13 and the body 15 are fitted to the measuring moving portion 20 by the body 15, and are movable on the measuring moving portion 20 along the Y-axis direction of the coordinate plane of the measuring platform 30.

The image measuring component 11 is fixed to one end of the body 15 and disposed toward the measuring platform 30 for performing image measurement on the object to be tested placed on the measuring platform 30. Specifically, the image measuring assembly 11 is movable relative to the body 15 in the Z-axis direction along the coordinate plane of the measuring platform 30, and the servo motor (not shown) drives the screw to drive the image measuring assembly 11 to maximize the stroke in the Z-axis direction. 300mm movement. The image measuring component 11 is a Charge Coupled Device (CCD) lens, and is also a Complementary Metal Oxide Semiconductor (CMOS) lens. In the preferred embodiment, the image measuring component 11 is a CCD lens.

The contact measuring component 13 is fixed to the same end of the body 15 adjacent to the image measuring component 11 and is disposed toward the measuring platform 30 for performing contact measurement on the object to be tested placed on the measuring platform 30. The contact measuring component 13 can be moved relative to the body 15 in the Z-axis direction along the coordinate plane of the measuring platform 30, and the servo motor (not shown) drives the screw to drive the image measuring component 11 along the z-axis direction. Make a maximum stroke of 300mm. The contact measuring assembly 13 includes a base 131, a probe 132, a sensor 133, and a converter 135. The base 131 is fixed on the body 15 , and the sensor 133 and the converter 135 are both disposed on the base 131 . The probe 132 is mounted on the end of the base 131 facing the measuring platform 30 . Specifically, the probe 132 is driven by the servo motor and the screw until the probe 132 contacts the surface of the object to be tested, and a signal is sent back to the sensor 133, and the sensor 133 receives the feedback signal. The control servo motor is stopped to drive the probe 132, and the position of the probe 132 at this time is measured. Sensor 133 will detect The data is transmitted to the converter 135 to convert the position signal into a signal recognizable by the host by the converter 135, and then transmitted to the host.

The measuring moving portion 20 includes a beam body 21 and a sliding portion 23 disposed at opposite ends of the beam body 21, and the beam body 21 is slidably fitted to the machine table 10 so that the machine table 10 can be along the measuring platform 30. The coordinate plane moves in the X-axis direction. The two sliding portions 23 are slidably mounted on the measuring platform 30, and the measuring moving portion 20 is moved by the two sliding portions 23 in the X-axis direction of the coordinate plane of the measuring platform. Specifically, the servo motor drives the measuring moving portion 20 to move the measuring stroke 30 on the measuring platform 30 in the X-axis direction by a maximum stroke of 1200 mm, and the servo motor drives the pulley with the driving table 10 on the upper rail of the sliding rail. The movement of the maximum stroke of 1500 mm is performed in the Y-axis direction.

The measuring platform 30 is used to place an object to be tested. A sliding slot 31 is disposed parallel to the two sides of the measuring platform 30 for slidingly mounting the sliding portion 23. A needle changing frame 33 is further disposed on a central portion of the measuring platform 30, and different sizes of probes (not shown) are mounted thereon for selecting different sizes of probes according to specific specifications of the components to be tested. The measuring platform 30 is further provided with at least three grating scales (not shown) for accurately measuring the Y-axis direction of the machine platform 10 along the coordinate plane of the measuring platform 30, and measuring the moving portion 20 along the coordinate plane of the measuring platform 30. The movement position information of the X-axis movement and image measuring assembly 11 and the contact measuring assembly 13 along the Z-axis of the coordinate plane of the measuring platform 30, so that the servo motor can accurately control the movement of the machine table 10, the measuring moving portion 20, and the image measuring assembly 11. .

The measurement control unit 50 is communicably connected to the computer and the display device by a cable (not shown) to turn the image measuring machine on or off. The measurement control unit 50 is provided with a plurality of complete machine support portions 51 and a plurality of complete machine moving portions 53. The entire machine support portion 51 and the entire machine moving portion 53 are arranged at positions where the measurement control unit 50 can be subjected to force. All the whole machine support parts 51 are affected as a whole The force is sufficient to securely support the measurement control unit 50 and support its measurement operation. All of the whole moving portions 53 are sufficient to support the measurement control unit 50 and support the movement thereof when the whole force is applied.

There are two ways to measure an object using this image measuring machine:

The first is non-contact image measurement: the servo motor is driven by the motive table 10 by the control end of the image measuring machine (not shown) until the image measuring component 11 is aligned with the object placed on the measuring platform 30; then the image measuring component 11 The image of the object is captured and transmitted to the host, and then displayed by the display device; the measurer can select the part to be tested of the image of the object by the mouse, etc., and the host calculates the size and flatness of the selected part, and by using the mouse, The display is displayed.

The second is contact measurement: the servo motor is driven by the control end of the image measuring machine (not shown), so that the probe 132 sequentially contacts the sampling point of the object to be tested; the sensor 133 detects the probe 132 at each a position at a sampling point and transmitted to the converter 135; the converter 135 converts the measured position of the probe 132 into a signal recognizable by the host and transmits it to the host; the host receives the value transmitted by the converter 135, and Displayed on the display; after the measurement is completed, the corresponding sampling data can be selected corresponding to the part to be tested, and the host can calculate the size, flatness and other parameters of the selected part, and display it by the display.

The machine 10, the measuring moving part 20 and the measuring platform 30 of the image measuring machine of the invention adopt a moving bridge structure to fully expand the measuring space, and the image measuring machine can realize non-contact image measuring not only by the image measuring component 11 The contact measurement can also be realized by the contact measurement component 13, so that when the image measurement component 11 does not measure well, or the component to be tested is not suitable for non-contact image measurement, the contact measurement can be performed by the contact measurement component 13. It effectively expands the application range of the image measuring machine and ensures the accuracy of image measurement.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

10‧‧‧ machine

11‧‧‧Image Measurement Components

13‧‧‧Contact measurement components

15‧‧‧Ontology

20‧‧‧Measurement of the mobile department

21‧‧‧ beam body

23‧‧‧Sliding section

30‧‧‧Measurement platform

31‧‧‧Chute

33‧‧‧Changer holder

50‧‧‧Measurement Control Department

51‧‧‧ machine support

53‧‧‧The whole machine movement department

Claims (8)

An image measuring machine includes a machine table and a measuring platform, wherein the measuring platform is used to carry an object to be tested, and the improvement is that the image measuring machine further comprises a measuring moving part mounted on the measuring platform, the machine The table is mounted on the measuring moving part, and the machine table, the measuring moving part and the measuring platform are connected by a moving bridge structure, and the machine comprises an image measuring component and a contact measuring component, and the image measuring machine uses the image measuring component to measure the object Realizing image detection, and performing contact detection by the contact measuring component, the contact measuring component comprises probes having different sizes, and the measuring platform further comprises a needle changing frame on which the different sizes are mounted The probe is used to replace the probes of different sizes on the contact measuring component according to the specific specifications of the object to be tested. The image measuring machine of claim 1, wherein the image measuring component is a CCD lens or a CMOS lens. The image measuring machine of claim 1, wherein the contact measuring component further comprises a sensor, the probe contacting the object to be tested under the control of the servo motor of the image sensor, the sensor The probe is detected to contact the surface of the object to stop the probe and detect the position of the probe. The image measuring machine of claim 1, wherein the measuring platform is provided with two sliding slots in parallel, and the measuring moving portion comprises two sliding portions, the sliding portion is slidably mounted in the sliding slot, so that the measuring movement is The portion moves along the X-axis direction of the coordinate plane of the measuring platform along the chute. The image measuring machine of claim 4, wherein the measuring moving portion further comprises a beam body connecting the two sliding portions, the machine table is mounted on the beam body, and the coordinate of the measuring platform is on the beam body The plane moves in the Y-axis direction. The image measuring machine of claim 1, wherein the measuring platform is provided with at least three grating scales. The image measuring machine of claim 1, wherein the image measuring machine is connected to a host and a display connected to the host, and the measurement result is calculated by the host by the display. The image measuring machine of claim 7, wherein the image measuring machine further comprises a measurement control unit for controlling the machine to perform measurement, and the machine is connected to the host by the measurement control unit.