Image measuring device

Abstract

The invention relates to an image measuring device, comprising a workpiece clamping unit; a first motion platform; a laser transmitter; an image sensor; a second motion platform; the laser receiver is arranged on the second motion platform; the light supplementing unit is arranged on the second motion platform and used for providing light for the workpiece; a control unit; the working process of the image measuring device is as follows: the workpiece clamping unit clamps a workpiece; controlling the first motion platform or both the first motion platform and the second motion platform to enable the laser receiver to receive a signal transmitted by the laser transmitter; controlling the movement directions of the first movement platform and the second movement platform to be completely consistent, enabling the image sensor to move to the image taking position of the to-be-measured hole position, and controlling the light supplementing unit to supplement light; the image sensor takes an image of the to-be-measured hole site at the image taking position. According to the invention, a light environment is provided for image measurement, and an image sensor can conveniently and clearly capture an image of a hole site.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece measurement, and in particular to an image measuring device. Background Art

[0002] With the development of science and technology, optical measurement is increasingly used in the measurement field. Image measurement occupies a certain proportion in the field of optical measurement. Compared with trigger measurement, image measurement has the advantages of high measurement efficiency and no damage to the workpiece.

[0003] In the existing technology, when an image sensor is used to perform image measurement on the inner hole of a workpiece, the inner hole is relatively deep. Due to insufficient illumination intensity and other reasons, the internal boundary cannot be captured, resulting in a large difference between the measured diameter and the triggered measurement diameter, and the image measurement result.

[0004] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Summary of the Invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide an image measuring device. When performing image measurement on the hole position in the workpiece, the fill light unit is used to fill light for the back of the workpiece, providing a lighting environment for image measurement, making it easier for the image sensor to clearly capture the hole position.

[0006] In order to solve the above technical problems, the present invention proposes the following technical solutions: The present application relates to an image measuring device, comprising: A workpiece clamping unit, which is used to clamp a workpiece located thereon, wherein the workpiece has a hole position to be measured; A first motion platform is provided on one side of the workpiece clamping unit and is capable of X-direction motion and Z-direction motion; a laser emitter, which is arranged on the first motion platform, with an emitting surface facing the side where the workpiece clamping unit is located; an image sensor, which is disposed on the first motion platform and has an imaging surface facing the workpiece; a second motion platform, which is opposite to the first motion platform and is arranged on the other side of the workpiece clamping unit and can move in the X direction and the Z direction; a laser receiver, which is arranged on the second motion platform, with a receiving surface facing the emitting surface of the laser transmitter; a fill light unit, disposed on the second motion platform and configured to provide light to the workpiece; The control unit is connected to the workpiece clamping unit, the laser transmitter, the first motion platform, the laser receiver, the image sensor, the second motion platform, and the fill light unit. The working process of the image measuring device is as follows: The workpiece clamping unit clamps the workpiece thereon; controlling the first motion platform or both the first motion platform and the second motion platform so that the receiving surface of the laser receiver receives the laser signal emitted by the emitting surface of the laser emitter; After the laser receiver receives the laser signal, the first motion platform and the second motion platform are controlled to move in the same direction, so that the image sensor moves to the imaging position of the hole to be measured, and the fill light unit is controlled to fill light; The image sensor captures an image at the imaging position; The X direction is perpendicular to the axis of the hole to be measured, and the Z direction is perpendicular to the X direction and along the radial direction of the hole to be measured.

[0007] In some embodiments of the present application, the workpiece clamping unit includes: a storage table, the workpiece is placed on a top surface of which, the first motion platform and the second motion platform are located on opposite sides of the storage table; A pair of clamping parts are arranged oppositely on both sides of the storage platform along the X direction, and the clamping parts include: a cylinder connected to the control unit; a connecting rod assembly, one end of which is hinged to the piston rod of the cylinder; a clamping baffle hingedly connected to the other end of the connecting rod assembly; When the cylinders of the pair of clamping parts are actuated to extend and retract their piston rods, the connecting rod assembly is actuated to clamp the workpiece when the pair of clamping baffles are brought closer to each other and hinge to release the workpiece when the pair of clamping baffles are moved away from each other.

[0008] In some embodiments of the present application, a slide groove is provided on the top surface of the storage platform, and the sliding direction of the slide groove is along the X direction; The pair of clamping baffles are slidably matched with the slide groove and extend beyond the top surface. Parts of the pair of clamping baffles extending beyond the top surface are used to contact the workpiece.

[0009] In some embodiments of the present application, the slide groove is continuous along the X direction, and limiting portions are formed on both sides of the slide groove along the X direction; The clamping baffles respectively correspond to the limiting portions on both sides of the sliding slot to form clamping slots, and the corresponding limiting portions are clamped into the corresponding clamping slots.

[0010] In some embodiments of the present application, the first motion platform includes: First base; A first X-axis platform, comprising a first X-direction slide rail, a first X-direction slider, a first X-direction ball screw, and a first X-direction drive assembly for driving the first X-direction ball screw to rotate, wherein the first X-direction slide rail and the first X-direction ball screw are respectively disposed on the first base, and the first X-direction slider is connected to a nut of the first X-direction ball screw and is slidably disposed on the first X-direction slide rail; The first Z-axis platform includes a first Z-axis slide, a first Z-axis slide rail, a first Z-axis slider, a first Z-axis mounting rod, a first Z-axis ball screw and a first Z-axis drive assembly for driving the first Z-axis ball screw to rotate. The first Z-axis slide is connected to the first Z-axis slider, the first Z-axis slide rail and the first Z-axis ball screw are respectively arranged on the first Z-axis slide, the first Z-axis slider is slidably arranged on the first Z-axis slide rail and is respectively connected to the nut of the first Z-axis ball screw and the first Z-axis mounting rod, and the laser emitter and the image sensor are installed on the first Z-axis mounting rod.

[0011] In some embodiments of the present application, the second motion platform includes: Second base; a second X-axis platform, comprising an X-axis slide, a second X-axis slider, a second X-axis ball screw, and a second X-axis drive assembly for driving the second X-axis ball screw to rotate, wherein the X-axis slide and the second X-axis ball screw are respectively disposed on the second base, and the second X-axis slider is connected to the nut of the second X-axis ball screw and is slidably disposed in the X-axis slide; The second Z-axis platform includes a second Z-axis slide, a Z-axis slide groove, a second Z-axis slider, a second Z-axis mounting rod, a second Z-axis ball screw and a second Z-axis drive assembly for driving the second Z-axis ball screw to rotate. The second Z-axis slide is connected to the second X-axis slider, the Z-axis slide groove and the second Z-axis ball screw are respectively arranged on the second Z-axis slide, the second Z-axis slider is respectively connected to the nut of the second Z-axis ball screw and the second Z-axis mounting rod and is slidably arranged in the Z-axis slide groove, the second Z-axis mounting rod extends out of the Z-axis slide groove and is equipped with the laser receiver and the fill light device.

[0012] In some embodiments of the present application, the fill light unit includes: a light source, disposed on the second motion platform and configured to provide illumination to the workpiece; A controllable switch is provided on the power supply circuit of the light source, and the controllable switch is connected to the control unit.

[0013] In some embodiments of the present application, the workpiece clamping unit includes: A clamping button is connected to the control unit. When the clamping button is pressed, the control unit controls the piston rod of the cylinder to extend to clamp the workpiece. When the clamping button is pressed again, the control unit controls the piston rod of the cylinder to retract to release the workpiece.

[0014] Compared with the prior art, the image measurement device provided by this application has the following advantages and beneficial effects: The laser signal from the laser transmitter is received by the laser receiver, and the second motion platform starts to move along with the first motion platform together with the motion signal. Afterwards, when the image sensor is driven by the first cloud platform to move when measuring the hole position, the second motion platform follows the first motion platform to drive the fill light device to move. Therefore, when the image sensor measures the hole position from the front of the workpiece at the imaging position, the fill light unit provides light from the back of the workpiece, providing a lighting environment for the image sensor to measure the hole position, so that the image sensor can clearly obtain the hole position boundary.

[0015] Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of the image measurement device proposed in the present invention; Figure 2 A flow chart of image measurement performed by the image measuring device proposed in the present invention; Figure 3 This is a structural diagram of the object placement platform in the image measuring device proposed by the present invention; Figure 4 This is a structural diagram of the workpiece clamping unit in the image measuring device proposed by the present invention; Figure 5 This is a schematic structural diagram of the second motion platform in the image measuring device proposed in the present invention; Reference numerals: 100, image sensor; 200, laser emitter; 300, workpiece clamping unit; 310, storage platform; 311, slide; 312, limiter; 313, storage slot; 320, clamping unit; 320A, first clamping unit; 321, first cylinder; 322, first connecting rod assembly; 322A, first connecting rod; 322B, second connecting rod; 323, first clamping baffle; 323A, first slot; 323B, lug; 320B, second clamping unit; 400, second Motion platform; 410, second base; 420, second X-axis platform; 421, X-axis slide; 422, second X-axis drive assembly; 423, second X-axis slider; 430, second Z-axis platform; 431; second Z-axis slide; 432; Z-axis slide; 433, second Z-axis slider; 434, second Z-axis mounting rod; 500, laser receiver; 600, fill light unit; 700, workpiece; 710, hole position; 800, first motion platform; 810, first Z-axis mounting rod. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention in specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any appropriate manner in any one or more embodiments or examples.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0022] In order to improve the clarity of the image sensor 100 capturing the hole 710 of the workpiece 700 and avoid the problem of not being able to capture the inner boundary of the hole 710 due to insufficient light intensity, see Figures 1 to 5 , the present application provides an image measuring device.

[0023] See also Figure 1 The image measuring device includes a workpiece clamping unit 300, a first motion platform 800, a laser emitter 200, an image sensor 100, a second motion platform 400, a laser receiver 500, a fill light unit 600 and a control unit (not shown). The control unit is respectively connected to the workpiece clamping unit 300, the first motion platform 800, the laser emitter 200, the image sensor 100, the second motion platform 400, the laser receiver 500 and the fill light unit 600.

[0024] The workpiece clamping unit 300 is used to clamp a workpiece 700 thereon, and the workpiece 700 has a hole position 710 to be measured.

[0025] The first motion platform 800 and the second motion platform 400 are respectively arranged on both sides of the workpiece clamping unit 300. The first motion platform 800 and the second motion platform 400 can both realize X-direction movement and Z-direction movement (see Figure 1 ), wherein the X direction is perpendicular to the axis of the hole position 710 to be measured, and the Z direction is perpendicular to the X direction and along the radial direction of the hole position 710 to be measured.

[0026] The laser emitter 200 and the image sensor 100 are both disposed on a first motion platform 800 , and the first motion platform 800 can drive the laser emitter 200 and the image sensor 100 to move synchronously along the X and Z directions.

[0027] The laser receiver 500 and the fill light unit 600 are both disposed on the second motion platform 400 , and the second motion platform 400 can drive the laser receiver 500 and the fill light unit 600 to move synchronously along the X and Z directions.

[0028] The side of the workpiece 700 facing the image sensor 100 is called the front side, and the side of the workpiece 700 facing the fill light unit 600 is called the back side.

[0029] The emitting surface of the laser emitter 200 faces the workpiece clamping unit 300, and its Z-direction height is higher than the Z-direction height of the workpiece 700 when it is in the workpiece clamping unit 300. The receiving surface of the laser receiver 500 faces the workpiece clamping unit 300, and its Z-direction height is also higher than the Z-direction height of the workpiece 700 when it is in the workpiece clamping unit 300, so as to prevent the workpiece 700 and the workpiece clamping unit 300 from blocking the laser emitter 200 from emitting light and the laser receiver 500 from receiving light.

[0030] The imaging surface of the image sensor 100 faces the workpiece clamping unit 300 and is used to image the hole 710 of the workpiece 700 on the workpiece clamping unit 300. The fill light unit 600 is located on the back of the workpiece 700. Therefore, when the image sensor 100 takes an image of the workpiece 700, the fill light unit 600 provides light to the workpiece 700 from the back of the workpiece 700, providing a lighting environment for the image sensor 100 to clearly take images.

[0031] In some embodiments of this application, see Figure 2 , which shows a flow chart of image measurement of a workpiece.

[0032] When capturing an image of the hole position 710 to be measured on the workpiece 700, the workpiece 700 is first placed on the workpiece clamping unit 300. Then, the first motion platform 800, or both the first motion platform 800 and the second motion platform 400, are controlled so that the laser receiver 500 can receive the laser signal emitted by the laser transmitter 200. After the laser receiver 500 receives the laser signal, the first motion platform 800 drives the image sensor 100 to measure the hole position 710 on the workpiece 700, while the second motion platform 400 also maintains consistent movement (for example, the first motion platform 800 and the second motion platform 400 both move the same distance in the positive direction of the X-axis, and then the first motion platform 800 and the second motion platform 400 both move the same distance in the positive direction of the Z-axis), thereby driving the fill light unit 600 to follow the image sensor 100.

[0033] When the image sensor 100 reaches the imaging position for measuring the hole 710 , the fill light unit 600 can provide fill light for the hole 710 from the back of the workpiece 700 . In this way, the image sensor 100 can accurately capture the inner edge of the hole 710 with the help of the lighting environment provided by the fill light unit 600 .

[0034] It should be noted that the installation positions of the laser emitter 200 and the image sensor 100 on the first motion platform 800, and the installation positions of the laser receiver 500 and the fill light unit 600 on the second motion platform 400 are all pre-installed according to measurement requirements, so that when the image sensor 100 reaches the imaging position, the fill light unit 600 is on the back of the workpiece 700.

[0035] The following describes in detail how to ensure that the laser receiver 500 can receive the laser signal emitted by the laser transmitter 200 and perform preparations before image measurement.

[0036] In some embodiments of the present application, when the machine is reset to zero, the laser emitter 200 and the laser receiver 500 both have initial positions and both are in the same coordinate system as the image sensor 100. Therefore, according to their respective initial positions, the laser emitter 200 can be moved to a position where its emitting surface is opposite to the receiving surface of the laser receiver 500 under the drive of the first motion platform 800, or the first motion platform 800 can be controlled to move the laser emitter 200 and the second motion platform 400 can be controlled to move the laser receiver 500, so that the emitting surface of the laser emitter 200 and the receiving surface of the laser receiver 500 are opposite, so that the laser receiver 500 receives the laser signal emitted by the laser emitter 200.

[0037] After the laser receiver 500 receives the laser signal, before the image sensor 100 measures the hole position 710 , the image sensor 100 needs to be moved to an imaging position for image measurement of the hole position 710 .

[0038] In some embodiments of the present application, when performing image measurement, the workpiece coordinate systems of the image sensor 100 and the workpiece 700 are initially inconsistent. Then, the established workpiece coordinate system is triggered (in the workpiece coordinate system, the measured positions of the workpiece 700 are all known in the workpiece coordinate system), and the workpiece coordinate system is associated with the coordinate system of the image sensor 100. In this way, when the first motion platform 800 drives the image sensor 100 to move and measure the hole position 710, the image sensor 100 can know the imaging position to which it needs to move.

[0039] As the image sensor 100 moves, the second motion platform 400 and the first motion platform 800 keep moving simultaneously and in completely consistent directions, so that the fill light unit 600 moves with the image sensor 100, ensuring that when the image sensor 100 moves to the imaging position, the fill light unit 600 is also located on the back of the workpiece 700. At this time, the fill light unit 600 is controlled to be turned on to provide light for the back of the workpiece 700, thereby providing a lighting environment for the image sensor 100 to capture images, making it easier for the image sensor 100 to clearly obtain the internal boundary of the hole position 710 and capture the clear outline of the hole position 710.

[0040] In some embodiments of the present application, the fill light unit 600 may include a light source (not shown) and a controllable switch (not shown). The controllable switch is connected to a control unit and is connected to a power supply circuit that provides power to the light source. After the image sensor 100 moves to the imaging position, the control unit controls the controllable switch to turn on, powering the light source, which then provides illumination.

[0041] In some embodiments of the present application, in order to achieve the clamping of the workpiece 700, see Figure 1 、 Figure 3 and Figure 4 The workpiece clamping unit 300 includes a placement table 310 and a pair of clamping parts 320 .

[0042] The top surface of the placement table 310 is used to place the workpiece 700 , and the first motion platform 800 and the second motion platform 400 are located on opposite sides of the placement table 310 .

[0043] The pair of clamping portions 320 are disposed on two sides of the placement platform 310 along the X-axis, that is, on two opposite sides different from the two sides where the first motion platform 800 and the second motion platform 400 are located.

[0044] For convenience of description, the pair of clamping portions 320 includes a first clamping portion 320A and a second clamping portion 320B.

[0045] When the workpiece 700 is placed on the top surface of the table 310, see Figure 1 The first clamping portion 320A and the second clamping portion 320B apply clamping forces along the positive X direction and the negative X direction respectively to clamp the workpiece 700.

[0046] The structure of the clamping portion 320 is described by taking the structure of the first clamping portion 320A as an example.

[0047] See also Figure 4 The first clamping portion 320A includes a first cylinder 321, a first connecting rod assembly 322 and a first clamping baffle 323. One end of the first connecting rod assembly 322 is hinged to the piston rod of the first cylinder 321 and the other end is hinged to the first clamping baffle 323.

[0048] In some embodiments of the present application, the first connecting rod assembly 322 includes a first connecting rod 322A and a second connecting rod 322B, one end of the first connecting rod 322A is hinged to the piston rod and the other end is hinged to one end of the second connecting rod 322B, and the other end of the second connecting rod 322B is hinged to the first clamping baffle 323. Specifically, two opposite lugs 323B are provided on the first clamping baffle 323, and the two lugs 323B respectively have pin holes (not shown). The pin (not shown) passes through the pin hole at the other end of the second connecting rod 322B and the pin holes on the two lugs 323B to realize the hinge connection between the second connecting rod 322B and the first clamping baffle 323.

[0049] In some embodiments of the present application, the first cylinder 321 of the first clamping portion 320 and the cylinder of the second clamping portion 320 are arranged in a back-to-back manner, so that the piston rod of the first cylinder 321 and the piston rod of the cylinder of the second clamping portion 320 extend in a back-to-back manner (see Figure 1 and Figure 4, the piston rod of the first cylinder 321 extends in the negative direction X, and the piston rod of the cylinder of the second clamping portion 320 extends in the positive direction X) away from or retracts towards each other (see Figure 1 and Figure 4 , the piston rod of the first cylinder 321 retracts along the positive direction X, and the piston rod of the cylinder of the second clamping part 320 retracts along the negative direction X) approach.

[0050] The second connecting rod 322B in the first connecting rod assembly 322 of the first clamping portion 320A and the second connecting rod in the connecting rod assembly of the second clamping portion 320B are arranged relative to each other, and when the piston rod of the first cylinder 321 and the piston rod of the cylinder in the second clamping portion 320B are extended, the two second connecting rods respectively drive the corresponding clamping baffles to move relatively closer (see Figure 1 and Figure 4 , the second connecting rod 322B drives the corresponding first clamping block 323 to move along the positive direction of X, and the second connecting rod in the second clamping part 320B drives the corresponding clamping block to move along the negative direction of X) to clamp the workpiece 700. When the piston rod of the first cylinder 321 and the piston rod of the cylinder in the second clamping part 320B retract, the two second connecting rods respectively drive the corresponding clamping blocks to move away from each other (see Figure 1 and Figure 4 , the second connecting rod 322B drives the corresponding first clamping block 323 to move along the negative direction of X, and the second connecting rod in the second clamping portion 320B drives the corresponding clamping block to move along the positive direction of X) to release the workpiece 700.

[0051] In some embodiments of the present application, before image measurement, the workpiece clamping unit 300 can be operated by pressing a button to clamp or release the workpiece 700. A clamping button (not shown) can be provided on the storage table 310 and connected to the control unit.

[0052] After placing the workpiece 700 on the storage table 310, press the clamping button, and the control unit controls the piston rods of the cylinders of the first clamping part 320A and the second clamping part 320B to extend, driving the two clamping baffles of the pair of clamping parts 320 to move relatively close to clamp the workpiece 700, and then perform image measurement; after completing the image measurement, you can press the clamping button again, and the control unit controls the piston rods of the cylinders of the first clamping part 320A and the second clamping part 320B to retract, driving the two clamping baffles of the pair of clamping parts 320 to move relatively away to release the workpiece 700. At this time, the user can remove the workpiece 700.

[0053] In some embodiments of the present application, for the convenience of arrangement, see Figure 1 and Figure 3 The cylinders of the first clamping part 320A and the second clamping part 320B are respectively arranged in the placement grooves ( Figure 3 Only the storage slot 313 is shown.

[0054] In order to make the clamping portion 320 slide stably, see Figure 3 A slide groove 311 is provided on the top surface of the storage platform 310, and the first clamping block 323 is slidably engaged with the slide groove 311 and partially protrudes from the top surface (see Figure 1 ), so that when the first cylinder 321 is actuated, the portion of the first clamping block 323 that extends beyond the top surface can contact the workpiece 700 and clamp the workpiece 700.

[0055] In some embodiments of the present application, the slide groove 311 is continuous along the X-direction, and limiting portions 312 are formed on both sides of the slide groove 311 along the X-direction. The two limiting portions 312 can be two opposite blocking edges of the slide groove 311.

[0056] See also Figure 4 The first clamping block 323 corresponds to the limiting portions 312 on both sides of the sliding groove 311 to form a clamping groove ( Figure 4 Only one of the slots 323A is shown in the figure), the corresponding limiting portion 312 is engaged with the corresponding slot 323A, limiting the first clamping block 323 from escaping from the sliding slot 311 when the first connecting rod assembly 322 applies force.

[0057] When the first clamping block 323 is installed, the first clamping block 323 can slide into the slide groove 311 from the through openings on both sides of the slide groove 311 along the X direction respectively, and at the same time, the limiting portion 312 is clamped into the clamping groove 323A.

[0058] In some embodiments of the present application, the first motion platform 800 realizes the X-axis and Z-axis movement of the laser emitter 200 and the image sensor 100. The first motion platform 800 may include a first base (not shown), a first X-axis platform (not shown) and a first Z-axis platform (not shown).

[0059] The first X-axis platform may include a first X-direction slide rail, a first X-direction slider, a first X-direction ball screw, and a first X-direction drive assembly for driving the first X-direction ball screw to rotate.

[0060] In order to facilitate the setting of the first X-axis platform, a first X-direction slide rail is provided on the top of the first base, specifically two first X-direction slide rails arranged in parallel along the X-direction to ensure stable sliding in the X-direction.

[0061] The first X-direction sliding block is slidably disposed on the first X-direction sliding rail.

[0062] The first X-direction ball screw is arranged on the first base, and its length direction is along the X-direction. It is driven by the first X-direction drive assembly to roll, driving the nut of the first X-direction ball screw to move along the X-direction. Since the first X-direction slider is connected to the nut of the first X-direction ball screw, it will also drive the first X-direction slider to slide along the X-direction.

[0063] The first X-direction drive assembly can be a first X-direction drive motor and a first reducer. The driving force output by the first X-direction drive motor is connected to the first X-direction ball screw through the first reducer, so that when the first X-direction drive motor is working, the first X-direction ball screw is driven to rotate.

[0064] Alternatively, the first X-direction drive assembly may include a first X-direction drive motor and a first X-direction belt transmission assembly, and the energy output by the first X-direction drive motor is transmitted to the first X-direction ball screw through the first X-direction belt transmission assembly.

[0065] The first Z-axis platform includes a first Z-direction slide, a first Z-direction slide rail, a first Z-direction slider, a first Z-direction mounting rod 810 (see Figure 1 ), a first Z-direction ball screw and a first Z-direction drive assembly for driving the first Z-direction ball screw to rotate.

[0066] The first Z-direction slide is connected to the first X-direction slide, and the first Z-direction slide rail and the first Z-direction ball screw are respectively arranged on the first Z-direction slide, the first Z-direction slide is slidably arranged on the first Z-direction slide rail, and the first Z-direction slide is respectively connected to the nut of the first Z-direction ball screw and the first Z-direction mounting rod 810.

[0067] The first Z-direction ball screw is driven by the first Z-direction drive assembly to roll, driving the nut of the first Z-direction ball screw to move along the Z-direction. Since the first Z-direction slider is connected to the nut of the first Z-direction ball screw and the first Z-direction mounting rod 810 respectively, it will also drive the first Z-direction mounting rod 810 to slide along the Z-direction.

[0068] See also Figure 1 The laser emitter 200 and the image sensor 100 are both mounted on the first Z-direction mounting rod 810. When the first X-direction drive assembly is controlled to operate, the first Z-direction slide (together with the first Z-direction mounting rod 810) can slide along the X-direction, thereby adjusting the X-direction position of the laser emitter 200 and the image sensor 100. When the first Z-direction drive assembly is controlled to operate, the first Z-direction mounting rod 810 can slide along the Z-direction, thereby adjusting the Z-direction position of the laser emitter 200 and the image sensor 100.

[0069] In some embodiments of the present application, the second motion platform 400 may be designed with a structure similar to that of the first motion platform 800 .

[0070] The second motion platform 400 can also be designed in other forms, see Figure 1 、 Figure 3 and Figure 5 .

[0071] In some embodiments of the present application, the second motion platform 400 realizes the X-axis and Z-axis motion of the laser receiver 500 and the fill light unit 600 . The second motion platform 400 may include a second base 410 , a second X-axis platform 420 , and a second Z-axis platform 430 .

[0072] The second X-axis platform 420 may include an X-direction slide groove 421 , a second X-direction slider 423 , a second X-direction ball screw, and a second X-direction driving assembly 422 for driving the second X-direction ball screw (not shown) to rotate.

[0073] In order to facilitate the installation of the second X-axis platform 420 , an X-direction sliding groove 421 and a second X-direction ball screw are respectively provided on the second base 410 .

[0074] The second X-direction sliding block 423 is slidably disposed in the X-direction sliding groove 421 .

[0075] The length direction of the second X-direction ball screw is along the X-direction, and is driven by the second X-direction drive assembly 422 to roll, driving the nut of the second X-direction ball screw to move along the X-direction. Since the second X-direction slider 423 is connected to the nut of the second X-direction ball screw, it will also drive the second X-direction slider 423 to slide along the X-direction.

[0076] The second Z-axis platform 430 includes a second Z-direction slide 431, a Z-direction slide groove 432, a second Z-direction slider 433, a second Z-direction mounting rod 434, a second Z-direction ball screw (not shown) and a second Z-direction drive assembly (not shown) for driving the second Z-direction ball screw to rotate.

[0077] The second Z-direction slide 431 is connected to the second X-direction slide 423, and the Z-direction slide groove 432 and the second Z-direction ball screw are respectively arranged on the second Z-direction slide 431, the second Z-direction slide 433 is slidably arranged in the Z-direction slide groove 432, and the second Z-direction slide 433 is respectively connected to the nut of the second Z-direction ball screw and the second Z-direction mounting rod 434.

[0078] The second Z-direction ball screw is driven by the second Z-direction drive assembly to roll, driving the nut of the second Z-direction ball screw to move along the Z-direction. Since the second Z-direction slider 433 is respectively connected to the nut of the second Z-direction ball screw and the second Z-direction mounting rod 434, it will also drive the second Z-direction mounting rod 434 to slide along the Z-direction.

[0079] The laser receiver 500 and the fill light unit 600 are both mounted on the second Z-direction mounting rod 434. When the second X-direction drive assembly 422 is controlled to work, the second Z-direction slide 431 (together with the second Z-direction mounting rod 434) can slide along the X-direction, thereby adjusting the X-direction position of the laser receiver 500 and the fill light unit 600. When the second Z-direction drive assembly is controlled to work, the second Z-direction mounting rod 434 can slide along the Z-direction, thereby adjusting the Z-direction position of the laser receiver 500 and the fill light unit 600.

[0080] The image measuring device involved in the present application can complete the preparation work before image measurement by adjusting the relative positions of the laser emitter 200 and the laser receiver 500 so that the laser receiver 500 receives the signal emitted by the laser emitter 200. Then, when the image sensor 100 is driven by the first motion platform 800 to measure the hole position 710, the fill light unit 600 is driven by the second motion platform 400 to follow the movement. When the image sensor 100 moves to the imaging position, the fill light unit 600 can be used to fill light the workpiece 700 from the back, providing a lighting environment for the image sensor 100 to capture the image, facilitating the image sensor 100 to clearly obtain the internal edge information of the hole position 710, providing complete measurement and analysis data, thereby improving the accuracy of subsequent measurement and analysis.

[0081] It should be noted that after the laser emitter 200 and the laser receiver 500 are facing each other, since the movement directions of the first motion platform 800 and the second motion platform 400 are completely consistent, when the image sensor 100 is driven by the first motion platform 800 to move due to measuring the hole position 710, the laser emitter 200 is always aligned with the laser receiver 500 driven by the second motion platform 400.

[0082] By keeping the laser emitter 200 aligned with the laser receiver 500 during the movement of the image sensor 100 to measure the hole position 710 , the accuracy of controlling the fill light unit 600 to start the fill light can be improved.

[0083] That is, the timing for turning on the fill light unit 600 can be when the image sensor 100 reaches the imaging position and the laser receiver 500 also receives the laser signal emitted by the laser emitter 200, thereby avoiding the inconsistent movement of the first motion platform 800 and the second motion platform 400 during the movement of the image sensor 100, which causes the fill light unit 600 to fail to move into place with the movement of the image sensor 100, resulting in the light provided by the fill light unit 600 being unable to provide an effective light source for the back of the workpiece 700.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An image measuring device, characterized in that: include: A workpiece clamping unit, which is used to clamp a workpiece located thereon, wherein the workpiece has a hole position to be measured; A first motion platform is provided on one side of the workpiece clamping unit and is capable of X-direction motion and Z-direction motion; a laser emitter, which is disposed on the first motion platform, with an emitting surface facing the workpiece clamping unit; an image sensor, which is disposed on the first motion platform and has an imaging surface facing the workpiece; a second motion platform, which is opposite to the first motion platform and is arranged on the other side of the workpiece clamping unit and can move in the X direction and the Z direction; a laser receiver, which is arranged on the second motion platform, with a receiving surface facing the emitting surface of the laser transmitter; a fill light unit, disposed on the second motion platform and configured to provide light to the workpiece; The control unit is connected to the workpiece clamping unit, the laser transmitter, the first motion platform, the laser receiver, the image sensor, the second motion platform, and the fill light unit. The working process of the image measuring device is as follows: The workpiece clamping unit clamps the workpiece; controlling the first motion platform or both the first motion platform and the second motion platform so that the receiving surface of the laser receiver receives the laser signal emitted by the emitting surface of the laser emitter; After the laser receiver receives the laser signal, the first motion platform and the second motion platform are controlled to move in the same direction, so that the image sensor moves to the imaging position of the hole to be measured, and the fill light unit is controlled to fill light; The image sensor takes an image of the hole position to be measured at the imaging position; The X direction is perpendicular to the axis of the hole to be measured, and the Z direction is perpendicular to the X direction and along the radial direction of the hole to be measured.

2. The image measuring device according to claim 1, wherein: The workpiece clamping unit comprises: a storage table, the workpiece is placed on a top surface of which, the first motion platform and the second motion platform are located on opposite sides of the storage table; A pair of clamping parts are arranged oppositely on both sides of the storage platform along the X direction, and the clamping parts include: a cylinder connected to the control unit; a connecting rod assembly, one end of which is hinged to the piston rod of the cylinder; a clamping baffle hingedly connected to the other end of the connecting rod assembly; When the cylinders of the pair of clamping parts are actuated to extend and retract their piston rods, the connecting rod assembly is actuated to clamp the workpiece when the pair of clamping baffles approach each other and release the workpiece when they move away from each other.

3. The image measuring device according to claim 2, wherein: A slide groove is provided on the top surface of the storage platform, and the sliding direction of the slide groove is along the X direction; The pair of clamping baffles are slidably matched with the slide groove and extend beyond the top surface. Parts of the pair of clamping baffles extending beyond the top surface are used to contact the workpiece.

4. The image measuring device according to claim 3, wherein: The slide groove is continuous along the X direction, and limiting portions are formed on both sides of the slide groove along the X direction; The clamping baffles respectively correspond to the limiting portions on both sides of the sliding slot to form clamping slots, and the corresponding limiting portions are clamped into the corresponding clamping slots.

5. The image measuring device according to claim 1, wherein: The first motion platform includes: First base; A first X-axis platform, comprising a first X-direction slide rail, a first X-direction slider, a first X-direction ball screw, and a first X-direction drive assembly for driving the first X-direction ball screw to rotate, wherein the first X-direction slide rail and the first X-direction ball screw are respectively disposed on the first base, and the first X-direction slider is connected to a nut of the first X-direction ball screw and is slidably disposed on the first X-direction slide rail; The first Z-axis platform includes a first Z-axis slide, a first Z-axis slide rail, a first Z-axis slider, a first Z-axis mounting rod, a first Z-axis ball screw and a first Z-axis drive assembly for driving the first Z-axis ball screw to rotate. The first Z-axis slide is connected to the first Z-axis slider, the first Z-axis slide rail and the first Z-axis ball screw are respectively arranged on the first Z-axis slide, the first Z-axis slider is slidably arranged on the first Z-axis slide rail and is respectively connected to the nut of the first Z-axis ball screw and the first Z-axis mounting rod, and the laser emitter and the image sensor are installed on the first Z-axis mounting rod.

6. The image measuring device according to claim 1, wherein: The second motion platform includes: Second base; a second X-axis platform, comprising an X-axis slide, a second X-axis slider, a second X-axis ball screw, and a second X-axis drive assembly for driving the second X-axis ball screw to rotate, wherein the X-axis slide and the second X-axis ball screw are respectively disposed on the second base, and the second X-axis slider is connected to the nut of the second X-axis ball screw and is slidably disposed in the X-axis slide; The second Z-axis platform includes a second Z-axis slide, a Z-axis slide groove, a second Z-axis slider, a second Z-axis mounting rod, a second Z-axis ball screw and a second Z-axis drive assembly for driving the second Z-axis ball screw to rotate. The second Z-axis slide is connected to the second X-axis slider, the Z-axis slide groove and the second Z-axis ball screw are respectively arranged on the second Z-axis slide, the second Z-axis slider is respectively connected to the nut of the second Z-axis ball screw and the second Z-axis mounting rod and is slidably arranged in the Z-axis slide groove, the second Z-axis mounting rod extends out of the Z-axis slide groove and is equipped with the laser receiver and the fill light device.

7. The image measuring device according to claim 1, wherein: The fill light unit includes: a light source, disposed on the second motion platform and configured to provide illumination to the workpiece; A controllable switch is provided on the power supply circuit of the light source, and the controllable switch is connected to the control unit.

8. The image measuring device according to claim 2, wherein: The workpiece clamping unit comprises: A clamping button is connected to the control unit. When the clamping button is pressed, the control unit controls the piston rod of the cylinder to extend to clamp the workpiece. When the clamping button is pressed again, the control unit controls the piston rod of the cylinder to retract to release the workpiece.

Images