Improved frame difference method vision measurement device

Abstract

The utility model discloses an improved frame difference method vision measurement device, which comprises a support plate, at least one group of first lever displacement amplification components is connected onto the support plate, and a measurement component is connected onto the support plate above the uppermost first lever displacement amplification component. The first lever displacement amplification assembly comprises a first movable ejector pin moving up and down along with an object. The measuring assembly comprises a CCD camera, the right side of the CCD camera is connected with a lens, the end, away from the CCD camera, of the lens is connected with a backlight tube, the side, away from the lens, of the backlight tube is provided with a light emitting source, the supporting plate is further connected with a measuring probe capable of sliding up and down, the bottom of the measuring probe makes contact with the upper side of the uppermost first lever, and the top of the measuring probe stretches into the backlight tube. And the displacement change of the bottommost first movable ejector pin is accumulated and amplified through a plurality of groups of first lever displacement amplification assemblies. According to the utility model, tiny displacement change is converted into observable physical quantity through the multi-stage lever amplification assembly, and the roughness measurement precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of roughness measurement technology, and in particular to an improved frame difference method visual measurement device. Background Technology

[0002] Conventional roughness measuring devices, when measuring minute displacements, often suffer from image indistinguishability on the camera's CCD surface when the measured displacement is less than 5 μm, due to the pixel size of the screen device typically being around 5 μm. To address this limitation, this application aims to design a visual measuring device that magnifies minute displacements hundreds of times before transmitting them to the camera's CCD surface, thereby improving image resolution. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] In view of the problems existing in the above and / or existing roughness measurement, this utility model is proposed.

[0005] Therefore, the problem to be solved by this invention is that the camera cannot accurately distinguish the image when measuring minute displacements, resulting in low roughness measurement accuracy. This invention uses a multi-stage lever amplification component to amplify minute displacements by more than 100 times, converting minute displacement changes into observable physical quantities, thereby improving the roughness measurement accuracy.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an improved frame difference method visual measurement device, comprising a support plate, at least one set of first lever displacement amplification components connected to the support plate, a measuring component connected to the support plate above the uppermost first lever displacement amplification component, the first lever displacement amplification component including a first connecting beam fixedly connected to the front side of the support plate, two first balancing units connected to the first connecting beam, a first lever connected to the upper end of the first balancing unit, a first fixing pin fixedly connected to the upper side of the first connecting beam, the first lever movably connected to the upper end of the first fixing pin, the length of the segment containing the first lever at the left end of the first fixing pin being greater than the length of the segment containing the first lever at the right end of the first fixing pin, a first connecting sleeve fixedly connected to the first connecting beam to the right of the first fixing pin, and a sliding mechanism connected to the first connecting sleeve. The first movable pin has its bottom in contact with the upper side of the object being measured. Several sets of first lever displacement amplification components accumulate and amplify the displacement changes on the upper side of the object being measured. The top of the first movable pin rests against the lower side of the first lever. The measuring component includes a CCD camera. A lens is connected to the right side of the CCD camera. A backlight tube is connected to the end of the lens away from the CCD camera. A connecting groove is opened on the downward side of the backlight tube. A light-emitting housing is fixedly connected to the side of the backlight tube away from the lens. A light source is installed inside the light-emitting housing. A test sleeve is also fixedly connected to the support plate between the backlight tube and the uppermost first lever displacement amplification component. A measuring probe that can slide up and down is connected to the test sleeve. The bottom of the measuring probe is in contact with the upper side of the left side of the first lever in the uppermost first lever displacement amplification component. The top of the measuring probe extends into the backlight tube through the connecting groove.

[0007] In the initial state, the cooperation of the first balancing unit, the fixed ejector pin, and the first movable ejector pin keeps the first lever in a horizontal equilibrium state. At this time, the measuring probe is stationary, the light source is turned on, and the backlight image of the measuring probe is captured by the CCD camera. The bottom of the first movable ejector pin contacts the surface of the object being measured facing upwards. When the object being measured is moved horizontally, this displacement is minimal as the roughness of the object changes. The first movable ejector pin rises and falls with the change in the roughness of the object being measured. When the first movable ejector pin rises and falls, the first lever loses its balance. The first lever swings to the left and right with the displacement of the first movable ejector pin. Due to the first lever at the left end of the first fixed ejector pin... The length of the segment containing the rod is greater than the length of the segment containing the first lever at the right end of the first fixed pin, so that the magnitude of the displacement change is amplified when it is fed back to the upper side of the left end of the first lever. After passing through several sets of first lever displacement amplification components, the displacement change is transmitted upward and accumulated and amplified. The measuring probe moves with the first lever in the uppermost set of first lever displacement amplification components. The CCD camera captures the backlight image of the measuring probe. The height of the differential image is relatively large, which can deduce the height change of the measured object. This utility model uses multi-stage lever displacement amplification components to amplify extremely small displacements, avoiding the limitations of CCD pixel size, and realizing the measurement of micro-displacements, that is, realizing the measurement of the surface roughness of the measured object.

[0008] As a preferred embodiment of the improved frame difference method visual measurement device of this utility model, it further includes a second lever displacement amplification component. The second lever displacement amplification component includes a second connecting beam fixedly connected to the front side of the support plate. Two second balancing units are connected to the second connecting beam. A second lever is connected to the upper end of the second balancing unit. A second fixed pin is fixedly connected to the upper side of the second connecting beam between the two second balancing units. The second lever is movably connected to the upper end of the second fixed pin. The length of the second lever segment at the right end of the second fixed pin is greater than the length of the second lever segment at the left end of the second fixed pin. A second connecting sleeve is fixedly connected to the second connecting beam to the left of the second fixed pin. A second movable pin that slides up and down is connected to the second connecting sleeve. The bottom of the second movable pin abuts against the upper side of the first lever below the second lever displacement amplification component. The bottom of the first movable pin in the first lever displacement amplification component above the second lever displacement amplification component abuts against the upper side of the right side of the second lever.

[0009] As a preferred embodiment of the improved frame difference method visual measurement device in this utility model, the first lever displacement amplification component is provided in two sets, and the second lever displacement amplification component is provided between the two sets of the first lever displacement amplification components.

[0010] As a preferred embodiment of the improved frame difference method visual measurement device of this utility model, the first balancing unit includes a first fixed sleeve fixedly connected to a first connecting beam, a first adjustable block with adjustable height connected inside the first fixed sleeve, a first tension spring hinged between the upper part of the first adjustable block and the first lever, the first movable pin includes a first movable block slidably connected inside the first connecting sleeve, a first movable rod fixed to the upper and lower sides of the first movable block respectively, the upper side of the upper first movable rod abutting the lower side of the first lever, a first lower adjusting nut and a first upper adjusting nut threadedly connected to the upper and lower ends of the first connecting sleeve respectively, a first lower tension spring fitted on the lower first movable rod, the upper and lower ends of the first lower tension spring connected between the upper side of the first lower adjusting nut and the lower side of the first movable block respectively, a first upper tension spring fitted on the upper first movable rod, the upper and lower ends of the first upper tension spring connected between the lower side of the first upper adjusting nut and the upper side of the first movable block respectively, and the upper and lower parts of the movable rod slidably connected to the first lower adjusting nut and the first upper adjusting nut respectively.

[0011] As a preferred embodiment of the improved frame difference method visual measurement device of this utility model, wherein: a first insertion hole is opened at the downward end of the first adjusting block, a first insertion interface is opened on the first adjusting block above the first insertion hole, a first transmission member is connected to the first fixed sleeve, the first transmission member includes a first transmission part threadedly connected to the lower part of the first fixed sleeve, a first intermediate part is fixed on the upper side of the first transmission part, a first transmission connection part is fixed on the upper side of the first intermediate part, the first transmission connection part is inserted into the first insertion interface, the lower side of the transmission connection part abuts against the first fixed sleeve below the first insertion interface, and the upper part of the first intermediate part is inserted into the first insertion hole.

[0012] As a preferred embodiment of the improved frame difference method visual measurement device of this utility model, the second balancing unit includes a second fixed sleeve fixedly connected to the second connecting beam, a second height-adjustable adjusting block connected inside the second fixed sleeve, a second tension spring hinged between the upper part of the second adjusting block and the second lever, the second movable pin includes a second movable block slidably connected inside the second connecting sleeve, second movable rods are fixedly fixed on the upper and lower sides of the second movable block respectively, the upper side of the upper second movable rod abuts against the lower side of the second lever, the upper and lower ends of the second connecting sleeve are threadedly connected to a second lower adjusting nut and a second upper adjusting nut respectively, a second lower tension spring is fitted on the lower second movable rod, the upper and lower ends of the second lower tension spring are respectively connected between the upper side of the second lower adjusting nut and the lower side of the second movable block, a second upper tension spring is fitted on the upper second movable rod, the upper and lower ends of the second upper tension spring are respectively connected between the lower side of the second upper adjusting nut and the upper side of the second movable block, and the upper and lower parts of the movable rod are slidably connected to the second lower adjusting nut and the second upper adjusting nut respectively.

[0013] As a preferred embodiment of the improved frame difference method visual measurement device of this utility model, wherein: a second insertion hole is opened at the downward end of the second adjusting block, a second insertion interface is opened on the second adjusting block above the second insertion hole, a second transmission component is connected to the second fixed sleeve, the second transmission component includes a second transmission part threadedly connected to the lower part of the second fixed sleeve, a second intermediate part is fixed on the upper side of the second transmission part, a second transmission connection part is fixed on the upper side of the second intermediate part, the second transmission connection part is inserted into the second insertion interface, the lower side of the second transmission connection part abuts against the second fixed sleeve below the second insertion interface, and the upper part of the second intermediate part is inserted into the second insertion hole.

[0014] As a preferred embodiment of the improved frame difference method visual measurement device of this utility model, the measurement component further includes a connecting seat, which is fixedly connected to the support plate between the back tube and the uppermost first lever amplification component. The measurement probe includes a movable block slidably connected inside the test sleeve. Movable probes are fixed on the upper and lower sides of the movable block, respectively. The upper side of the upper movable probe is inserted into the backlight tube. The upper and lower ends of the test sleeve are threadedly connected to a third lower nut and a third upper nut, respectively. A third lower tension spring is fitted on the lower movable probe, and the upper and lower ends of the third lower tension spring are respectively connected between the upper side of the third lower nut and the lower side of the movable block. A third upper tension spring is fitted on the upper movable probe, and the upper and lower ends of the third upper tension spring are respectively connected between the lower side of the third upper nut and the upper side of the movable block. The upper and lower parts of the movable rod are slidably connected to the third lower nut and the third upper nut, respectively. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Figure 1 To improve the front view of a frame difference method visual measurement device (without backlight tube, CCD camera and other imaging structures).

[0017] Figure 2 for Figure 1 A magnified view of the structure at point A in the middle.

[0018] Figure 3 for Figure 1 A magnified view of the structure at point B in the middle section.

[0019] Figure 4 The left view of the improved frame difference method visual measurement device.

[0020] Figure 5 To improve the front view of the measurement component in the frame difference method visual measurement device.

[0021] Figure 6 This is an equivalent model diagram of the present invention (a comparative schematic diagram of the state after the first movable ejector pin at the bottom moves up from the initial position).

[0022] Among them, 1 is the measuring component, 101 is the third lower nut, 102 is the third lower tension spring, 103 is the test sleeve, 104 is the connecting seat, 105 is the third upper tension spring, 106 is the third upper nut, 107 is the measuring probe, 1071 is the moving probe, 1072 is the moving block, and 108 is the measuring probe. CCD camera, 109 lens, 110 backlight tube, 111 light-emitting housing, 2 position adjustment assembly, 201 position adjustment block, 202 mounting plate, 203 second connecting plate, 204 guide rod, 205 first connecting plate, 206 lead screw, 3 first lever displacement amplification assembly, 301 first balancing unit, 3011 first tension spring, 302 first connecting beam, 303 first connecting sleeve, 304 first movable pin, 3041 first movable rod, 3042 first movable block, 305 first upper tension spring, 306 first fixed pin, 307 first upper adjusting nut, 308 first lever, 309 first lower tension spring, 310 first lower adjusting nut, 3011 first tension spring, 3012 first adjusting block, 313 first transmission... Moving part, 3131 First transmission connection part, 3132 First intermediate part, 3133 First transmission part, 4 Second lever displacement amplification assembly, 401 Second lever, 402 Second balance unit, 4021 Second transmission part, 4021-1 Second transmission part, 4021-2 Second intermediate part, 4021-3 Second transmission connection part, 4022 Second fixed sleeve, 4023 Second adjusting block, 4024 Second tension spring, 403 Second connecting beam, 404 Second lower adjusting nut, 405 Second lower tension spring, 406 Second movable pin, 4061 Second movable block, 4062 Second movable rod, 407 Second upper adjusting nut, 408 Second fixed pin, 409 Second upper tension spring, 410 Second connecting sleeve, 5 Support plate. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0026] Example 1: Refer to Figure 1 , Figure 2 and Figure 5 This is the first embodiment of the present invention, which provides an improved frame difference method visual measurement device that can measure the micro-displacement changes on the surface of the object being measured.

[0027] An improved frame difference method visual measurement device includes a support plate 5. At least one set of first lever displacement amplification components 3 are connected to the support plate 5. A measurement component 1 is connected to the support plate 5 above the uppermost first lever displacement amplification component 3. The first lever displacement amplification component 3 includes a first connecting beam 302 fixedly connected to the front side of the support plate 5. Two first balancing units 301 are connected to the first connecting beam 302. A first lever 308 is connected to the upper end of each first balancing unit 301. A first fixed pin 306 is fixedly connected to the upper side of the first connecting beam 302. The first lever 308 is movably connected to the upper end of the first fixed pin 306. The length of the segment containing the first lever 308 at the left end of the first fixed pin 306 is greater than the length of the segment containing the first lever 308 at the right end of the first fixed pin 306. A first connecting sleeve 303 is fixedly connected to the first connecting beam 302 to the right of the first fixed pin 306. A first movable pin 304 that slides up and down is connected to the first connecting sleeve 303. The bottom of the first movable pin 304... The part contacts the upper side of the object being measured, and several sets of first lever displacement amplification components 3 accumulate and amplify the displacement changes of the upper side of the object being measured. The top of the first movable pin 304 presses against the lower side of the first lever 308. The measuring component 1 includes a CCD camera. A lens 109 is connected to the right side of the CCD camera. A backlight tube 110 is connected to the end of the lens 109 away from the CCD camera. A connecting groove is opened on the downward side of the backlight tube 110. A light-emitting housing 111 is fixedly connected to the side of the backlight tube 110 away from the lens 109. A light source (which is prior art and does not need to be described in detail) is installed inside the light-emitting housing 111. A test sleeve 103 is also fixedly connected to the support plate 5 between the backlight tube 110 and the uppermost first lever displacement amplification component 3. A measuring probe 107 that can slide up and down is connected to the test sleeve 103. The bottom of the measuring probe 107 contacts the upper side of the left side of the first lever 308 in the uppermost first lever displacement amplification component 3. The top of the measuring probe 107 extends into the backlight tube 110 through the connecting groove.

[0028] In the initial state, the cooperation of the first balancing unit 301, the fixed ejector pin, and the first movable ejector pin 304 keeps the first lever 308 in a horizontal equilibrium state. At this time, the measuring probe 107 is stationary, the light source is turned on, and the backlight image of the measuring probe 107 is captured by the CCD camera. The bottom of the first movable ejector pin 304 contacts the surface of the object being measured facing upwards. When the object being measured moves horizontally, the displacement is minimal as the roughness of the object changes. The first movable ejector pin 304 rises and falls with the change in the roughness of the object being measured. When the first movable ejector pin 304 rises and falls, the first lever 308 loses its balance. The first lever 308 swings to the left and right with the displacement of the first movable ejector pin 304. Due to the first fixed ejector pin 306... The length of the segment containing the first lever 308 at the left end is greater than the length of the segment containing the first lever 308 at the right end of the first fixed pin 306. This causes the displacement change to be amplified when it is fed back to the upper side of the left end of the first lever 308. After passing through several sets of first lever displacement amplification components 3, the displacement change is transmitted upward and accumulated and amplified. The measuring probe 107 moves with the first lever 308 in the uppermost set of first lever displacement amplification components 3. The CCD camera captures the backlight image of the measuring probe 107. The height of the differential image is relatively large, which can deduce the height change of the measured object. This utility model uses multi-stage lever displacement amplification components to amplify extremely small displacements, avoiding the limitations of CCD pixel size, and realizing the measurement of micro-displacements, that is, realizing the roughness measurement of the surface of the measured object.

[0029] Example 2: Refer to Figures 1-3 and Figure 6 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment and can further realize multi-level cumulative amplification of minute displacements when measuring the surface roughness of an object, thereby improving the resolution of minute displacement measurement.

[0030] Specifically, it also includes a second lever displacement amplification assembly 4. The second lever displacement amplification assembly 4 includes a second connecting beam 403 fixedly connected to the front side of the support plate 5. Two second balancing units 402 are connected to the second connecting beam 403. A second lever 401 is connected to the upper end of the second balancing unit 402. A second fixing pin 408 is fixedly connected to the upper side of the second connecting beam 403 between the two second balancing units 402. The second lever 401 is movably connected to the upper end of the second fixing pin 408. The length of the segment containing the second lever 401 at the right end of the second fixing pin 408 is greater than the length of the segment containing the second lever 401 at the left end of the second fixing pin 408. In the section, a second connecting sleeve 410 is fixedly connected to the second connecting beam 403 to the left of the second fixed pin 408. A second movable pin 406 that slides up and down is connected to the second connecting sleeve 410. The bottom of the second movable pin 406 is against the upper side of the first lever 308 below the second lever displacement amplification component 4. The bottom of the first movable pin 304 in the first lever 308 measuring component 1 above the second lever displacement amplification component 4 is against the upper side of the right side of the second lever 401. The first lever 308 measuring component 1 is provided in two sets, and the second lever displacement amplification component 4 is provided between the two sets of first lever 308 measuring components 1.

[0031] The bottommost movable pin 304 moves according to the roughness of the surface of the object being measured. Taking the upward movement of the bottommost movable pin 304 as an example, the first movable pin 304 is pushed upward on the surface being measured. The first movable pin 304 pushes the bottommost first lever 308 to rotate counterclockwise around the first fixed pin 306. The left end of the first lever 308 moves downward, and the displacement of the left end of the first lever 308 is greater than the displacement of the first movable pin 304. The middle second movable pin 406 moves downward with the bottommost first lever 308. Under the action of the second movable pin 406, the second lever 401 rotates counterclockwise around the second fixed pin 408, and the left end of the second lever 401 swings downward. When the second lever 401 moves, the right end of the second lever 401 swings upward, and the displacement of the right end of the second lever 401 is greater than the displacement of the second movable pin 406. Under the action of the second movable pin 406, the uppermost first lever 308 swings counterclockwise around the uppermost first fixed pin 306. The left end of the uppermost first lever 308 moves downward, and the displacement of the left end of the uppermost first lever 308 is greater than the displacement of the uppermost first movable pin 304. As the left end of the uppermost first lever 308 moves downward, the displacement of the measuring pin increases cumulatively with the three levers from bottom to top. The frame difference between the initial position image and the measurement position image of the measuring probe 107 can reach the equivalent pixel value after cumulative magnification.

[0032] Specifically, the first balancing unit 301 includes a first fixed sleeve fixedly connected to the first connecting beam 302. A first height-adjustable adjusting block 3012 is connected inside the first fixed sleeve. A first tension spring 3011 is hinged between the upper part of the first adjusting block 3012 and the first lever 308. The first movable pin 304 includes a first movable block 3042 slidably connected inside the first connecting sleeve 303. First movable rods 3041 are fixed to the upper and lower sides of the first movable block 3042, respectively. 1. The upper side rests against the lower side of the first lever 308. The upper and lower ends of the first connecting sleeve 303 are respectively threaded with the first lower adjusting nut 310 and the first upper adjusting nut 307. The lower first movable rod 3041 is fitted with a first lower tension spring 309. The upper and lower ends of the first lower tension spring 309 are respectively connected between the upper side of the first lower adjusting nut 310 and the lower side of the first movable block 3042. The upper first movable rod 3041 is fitted with a first upper tension spring 305. The upper and lower ends of the first upper tension spring 305 are respectively connected to the lower side of the first lower adjusting nut 310 and the lower side of the first movable block 3042. Between the lower side of the upper adjusting nut 307 and the upper side of the first movable block 3042, the upper and lower parts of the movable rod are slidably connected to the lower adjusting nut 310 and the upper adjusting nut 307, respectively. The lower end of the first adjusting block 3012 has a first insertion hole, and the upper side of the first adjusting block 3012 has a first insertion interface. A first transmission component 313 is connected to the first fixed sleeve. The first transmission component 313 includes a first transmission part 3133 threadedly connected to the lower part of the first fixed sleeve. The upper side of the first intermediate part 3132 is fixed with a middle part, and the upper side of the middle part is fixed with a transmission connection part. The transmission connection part is inserted into the first plug-in interface and can rotate within the first plug-in interface. The lower side of the transmission connection part abuts against the first fixed sleeve on the lower side of the first plug-in interface. The upper side of the first intermediate part 3132 is fixed with a first transmission connection part 3131. The first transmission connection part 3131 is inserted into the first plug-in interface. The lower side of the first transmission connection part 3131 abuts against the first fixed sleeve on the lower side of the first plug-in interface. The upper insertion hole of the first intermediate part 3132 is inserted into the first plug-in interface.

[0033] Specifically, the second balancing unit 402 includes a second fixed sleeve 4022 fixedly connected to the second connecting beam 403. A height-adjustable second adjusting block 4023 is connected inside the second fixed sleeve 4022. A second tension spring 4024 is hinged between the upper part of the second adjusting block 4023 and the second lever 401. The second movable pin 406 includes a second movable block 4061 slidably connected inside the second connecting sleeve 410. Second movable rods 4062 are fixed to the upper and lower sides of the second movable block 4061 respectively. The upper side of the upper movable rod 4062 abuts against the lower side of the second lever 401. A second lower adjusting nut 404 and a second upper adjusting nut 407 are threaded to the upper and lower ends of the second connecting sleeve 410 respectively. A second lower tension spring 405 is fitted onto the lower movable rod 4062. The upper and lower ends of the second lower tension spring 405 are connected between the upper side of the second lower adjusting nut 404 and the lower side of the second movable block 4061 respectively. A second upper tension spring 409 is fitted onto the upper movable rod 4062. The upper and lower ends of the tension spring 409 are respectively connected between the lower side of the second upper adjusting nut 407 and the upper side of the second movable block 4061. The upper and lower parts of the movable rod are slidably connected to the second lower adjusting nut 404 and the second upper adjusting nut 407, respectively. The lower end of the second adjusting block 4023 has a second insertion hole, and the upper side of the second adjusting block 4023 has a second insertion interface. The second fixed sleeve 4022 is connected to the second transmission component 4021, which includes a threaded connection. The second transmission part 4021-1 is located at the lower part of the second fixed sleeve 4022. The upper side of the second transmission part 4021-1 is fixed with a second intermediate part 4021-2. The upper side of the second intermediate part 4021-2 is fixed with a second transmission connection part 4021-3. The second transmission connection part 4021-3 is inserted into the second insertion interface. The lower side of the second transmission connection part 4021-3 abuts against the second fixed sleeve 4022 on the lower side of the second insertion interface. The upper part of the second intermediate part 4021-2 is inserted into the second insertion hole.

[0034] The initial position of the first movable ejector pin 304 is adjusted by the first upper adjusting nut 307 and the first lower adjusting nut 310, the position of the first movable ejector pin 304 is adjusted by the position of the first transmission member 313, the initial position of the second movable ejector pin 406 is adjusted by the second upper adjusting nut 407 and the second lower adjusting nut 404, and the position of the second movable ejector pin 406 is adjusted by the position of the second transmission member 4021. That is, the preload of the first upper tension spring 305, the first lower tension spring 309, the first tension spring 3011, the second upper tension spring 409, the second lower tension spring 405, and the second tension spring 4024 is adjusted respectively, so that the first lever 308 and the second lever 401 are both in a horizontal balance state.

[0035] Specifically, the measuring component 1 also includes a connecting seat 104, which is fixedly connected to the support plate 5 between the back tube and the uppermost first lever 308 amplification component. The measuring probe 107 includes a moving block 1072 slidably connected inside the test sleeve 103. Moving probes 1071 are fixed on the upper and lower sides of the moving block 1072, respectively. The upper side of the upper moving probe 1071 is inserted into the backlight tube 110. The upper and lower ends of the test sleeve 103 are respectively threaded with a third lower nut 101 and a third upper nut 102. The lower movable probe 1071 of nut 106 is fitted with a third pull-down spring 102. The upper and lower ends of the third pull-down spring 102 are respectively connected between the upper side of the third lower nut 101 and the lower side of the movable block 1072. The upper movable probe 1071 is fitted with a third upper pull-up spring 105. The upper and lower ends of the third upper pull-up spring 105 are respectively connected between the lower side of the third upper nut 106 and the upper side of the movable block 1072. The upper and lower parts of the movable rod are slidably connected to the third lower nut 101 and the third upper nut 106.

[0036] To facilitate the description of the measurement principle of this application, an equivalent model has been drawn, such as... Figure 6 As shown, point P13 is the hinge point between the bottom leftmost first tension spring 3011 and the first lever 308; point P23 is the hinge point between the second tension spring 4024 and the second lever 401; point P33 is the contact point between the bottom of the measuring probe 107 and the topmost first lever 308; equivalent spring 1 is the equivalent spring of the bottom two first tension springs 3011; equivalent spring 2 is the equivalent spring of the two second tension springs 4024; and equivalent spring 3 is the equivalent spring of the top two first tension springs 3011. The following explanation uses a 1µm rise in the measured surface Po point as an example:

[0037] 1. The first movable pin 304 rises by 1µm, that is, point P12 rises by 1µm. The first movable pin 304 pushes the uppermost first lever 308 to rotate counterclockwise around point O1. The equivalent spring is stretched, that is, point P11 rises by 2µm, while point P13 falls by 10µm.

[0038] 2. Since point P13 drops by 10µm, the second movable pin 406 drops by 10µm. Under the pull of the equivalent spring 2, the second lever 401 rotates clockwise around point O2, causing point P23 to rise by 100µm.

[0039] 3. Since point P23 rises by 100um, the topmost first movable pin 304 rises by 100um. The topmost first movable pin 304 pushes the topmost first lever 308 to rotate counterclockwise around point O3. The equivalent spring 3 is stretched, that is, point P31 rises by 200um, while point P33 falls by 1000um (1mm).

[0040] 4. Since point P33 drops by 1000um, measuring probe 107 drops by 1000um, that is, the Pf point (Pf point is the vertex) of measuring probe 107 drops by 1000um.

[0041] It can be clearly seen from the above that, for the displacement change of the surface of the measured object, under a micro-displacement of 1µm, the frame difference between the initial position image and the measured position image of the measuring probe 107 can reach an equivalent pixel value of 1000µm.

[0042] Without the lever beam amplification mechanism, when the micro-displacement is 1µm, the frame difference between the initial position image and the measured position image of the measuring probe 107 is the equivalent pixel value of 1µm. Since the pixel size is generally a few micrometers, it is impossible to distinguish changes in small displacements.

[0043] Example 3: Refer to Figure 4 and Figure 5 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment and can further realize the position adjustment of the backlight tube 110 in the height direction.

[0044] Specifically, a position adjustment assembly 2 is connected to the front side of the upper part of the support plate 5. The position adjustment assembly 2 includes a first connecting plate 205 and a second connecting plate 203 spaced apart in the height direction. At least one vertically arranged lead screw 206 is rotatably connected between the first connecting plate 205 and the second connecting plate 203. Guide rods 204 are respectively connected to the left and right ends of the first connecting plate 205 and the second connecting plate 203. The position of the lead screw 206 in the left and right direction is between the two guide rods 204. A position adjustment block 201 is slidably connected to the two guide rods 204. The lead screw 206 and the position adjustment block 201 are threadedly connected. A mounting plate 202 is fixedly connected to the front side of the position adjustment block 201. The CCD camera and the light-emitting housing 111 are both fixedly connected to the mounting plate 202.

[0045] When it is necessary to adjust the height of the measuring probe 107 inside the backlight tube 110, rotate the lead screw 206. The lead screw 206 drives the position adjustment block 201 to move. The position adjustment block 201 drives the CCD camera and the light-emitting housing 111 to move via the mounting plate 202. When the tip of the measuring probe 107 extends into the appropriate position inside the backlight tube 110, stop rotating the lead screw 206.

[0046] This embodiment can adjust the position of the backlight tube 110 by adjusting the balance height of each lever assembly and the measuring probe 107 in the initial state.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An improved frame difference method visual measurement device, characterized in that: Includes a support plate, and the support plate is connected to... The device includes at least one set of first lever displacement amplification components. A measuring component is connected to a support plate above the uppermost first lever displacement amplification component. Each first lever displacement amplification component includes a first connecting beam fixedly connected to the front side of the support plate. Two first balancing units are connected to the first connecting beam. A first lever is connected to the upper end of each first balancing unit. A first fixed pin is fixedly connected to the upper side of the first connecting beam. The first lever is movably connected to the upper end of the first fixed pin. The length of the segment containing the first lever at the left end of the first fixed pin is greater than the length of the segment containing the first lever at the right end of the first fixed pin. A first connecting sleeve is fixedly connected to the first connecting beam to the right of the first fixed pin. A first movable pin that slides up and down is connected to the first connecting sleeve. The bottom of the first movable pin contacts the upper side of the object being measured. Several sets of first lever displacement amplification components accumulate and amplify the displacement changes on the upper side of the object under test. The top of the first movable pin rests on the lower side of the first lever. The measuring component includes a CCD camera. A lens is connected to the right side of the CCD camera. A backlight tube is connected to the end of the lens away from the CCD camera. A connecting groove is opened on the downward side of the backlight tube. A light-emitting housing is fixedly connected to the side of the backlight tube away from the lens. A light source is installed inside the light-emitting housing. A test sleeve is also fixedly connected to the support plate between the backlight tube and the uppermost first lever displacement amplification component. A measuring probe that can slide up and down is connected to the test sleeve. The bottom of the measuring probe contacts the upper side of the left side of the first lever in the uppermost first lever displacement amplification component. The top of the measuring probe extends into the backlight tube through the connecting groove.

2. The improved frame difference method visual measurement device as described in claim 1, characterized in that: It also includes a second lever displacement amplification assembly, which includes a second connecting beam fixedly connected to the front side of the support plate. Two second balancing units are connected to the second connecting beam. A second lever is connected to the upper end of each second balancing unit. A second fixed pin is fixedly connected to the upper side of the second connecting beam between the two second balancing units. The second lever is movably connected to the upper end of the second fixed pin. The length of the second lever section at the right end of the second fixed pin is greater than the length of the second lever section at the left end of the second fixed pin. A second connecting sleeve is fixedly connected to the second connecting beam to the left of the second fixed pin. A second movable pin that slides up and down is connected to the second connecting sleeve. The bottom of the second movable pin rests on the upper side of the first lever below the second lever displacement amplification assembly. The bottom of the first movable pin in the first lever displacement amplification assembly above the second lever displacement amplification assembly rests on the upper side of the right side of the second lever.

3. The improved frame difference method visual measurement device as described in claim 2, characterized in that: The first lever displacement amplification component is provided in two sets, and the second lever displacement amplification component is provided between the two sets of the first lever displacement amplification components.

4. The improved frame difference method visual measurement device as described in claim 2, characterized in that: The first balancing unit includes a first fixed sleeve fixedly connected to a first connecting beam. A first height-adjustable first adjusting block is connected inside the first fixed sleeve. A first tension spring is hinged between the upper part of the first adjusting block and the first lever. The first movable pin includes a first movable block slidably connected inside the first connecting sleeve. A first movable rod is fixed to the upper and lower sides of the first movable block. The upper side of the upper first movable rod abuts against the lower side of the first lever. A first lower adjusting nut and a first upper adjusting nut are threaded to the upper and lower ends of the first connecting sleeve, respectively. A first lower tension spring is fitted on the lower first movable rod. The upper and lower ends of the first lower tension spring are connected between the upper side of the first lower adjusting nut and the lower side of the first movable block, respectively. A first upper tension spring is fitted on the upper first movable rod. The upper and lower ends of the first upper tension spring are connected between the lower side of the first upper adjusting nut and the upper side of the first movable block, respectively. The upper and lower parts of the movable rod are slidably connected to the first lower adjusting nut and the first upper adjusting nut, respectively.

5. The improved frame difference method visual measurement device as described in claim 4, characterized in that: The first adjusting block has a first insertion hole at its downward-facing end, and a first insertion interface on the first adjusting block above the first insertion hole. A first transmission component is connected to the first fixed sleeve. The first transmission component includes a first transmission part threadedly connected to the lower part of the first fixed sleeve. A first intermediate part is fixed to the upper side of the first transmission part, and a first transmission connection part is fixed to the upper side of the first intermediate part. The first transmission connection part is inserted into the first insertion interface, and the lower side of the transmission connection part abuts against the first fixed sleeve below the first insertion interface. The upper part of the first intermediate part is inserted into the first insertion hole.

6. The improved frame difference method visual measurement device as described in claim 2, characterized in that: The second balancing unit includes a second fixed sleeve fixedly connected to the second connecting beam. A second height-adjustable second adjusting block is connected inside the second fixed sleeve. A second tension spring is hinged between the upper part of the second adjusting block and the second lever. The second movable pin includes a second movable block slidably connected inside the second connecting sleeve. Second movable rods are fixed to the upper and lower sides of the second movable block, respectively. The upper side of the upper second movable rod abuts against the lower side of the second lever. A second lower adjusting nut and a second upper adjusting nut are threaded to the upper and lower ends of the second connecting sleeve, respectively. A second lower tension spring is fitted on the lower second movable rod. The upper and lower ends of the second lower tension spring are connected between the upper side of the second lower adjusting nut and the lower side of the second movable block, respectively. A second upper tension spring is fitted on the upper second movable rod. The upper and lower ends of the second upper tension spring are connected between the lower side of the second upper adjusting nut and the upper side of the second movable block, respectively. The upper and lower parts of the movable rod are slidably connected to the second lower adjusting nut and the second upper adjusting nut, respectively.

7. The improved frame difference method visual measurement device as described in claim 6, characterized in that: The second adjusting block has a second insertion hole at its downward-facing end, and a second insertion interface on the second adjusting block above the second insertion hole. A second transmission component is connected to the second fixed sleeve. The second transmission component includes a second transmission part threadedly connected to the lower part of the second fixed sleeve. A second intermediate part is fixed to the upper side of the second transmission part, and a second transmission connecting part is fixed to the upper side of the second intermediate part. The second transmission connecting part is inserted into the second insertion interface, and the lower side of the second transmission connecting part abuts against the second fixed sleeve below the second insertion interface. The upper part of the second intermediate part is inserted into the second insertion hole.

8. The improved frame difference method visual measurement device as described in any one of claims 1 to 7, characterized in that: The measuring assembly also includes a connecting seat, which is fixedly connected to the support plate between the back tube and the uppermost first lever amplification assembly. The measuring probe includes a movable block slidably connected inside the test sleeve. Movable probes are fixed on the upper and lower sides of the movable block, respectively. The upper side of the upper movable probe is inserted into the backlight tube. The upper and lower ends of the test sleeve are threadedly connected to a third lower nut and a third upper nut, respectively. A third lower tension spring is fitted on the lower movable probe, with the upper and lower ends of the third lower tension spring connected between the upper side of the third lower nut and the lower side of the movable block, respectively. A third upper tension spring is fitted on the upper movable probe, with the upper and lower ends of the third upper tension spring connected between the lower side of the third upper nut and the upper side of the movable block, respectively. The upper and lower parts of the movable rod are slidably connected to the third lower nut and the third upper nut, respectively.

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