CN115096182A - Protective devices for measuring instruments - Google Patents

Abstract

The present disclosure describes a protection device for a measuring instrument. The protection device includes: a guide part, a floating part, a sensing part, and a control part for controlling the movement of the measuring lens. The guide part is arranged on the measuring lens and used to guide the floating part in a preset position When measuring the object to be measured, at least a part of the floating part is located between the measuring lens and the object to be measured, and the floating part includes a sliding rod, a light source arranged on the sliding rod and located at one end of the measuring lens close to the object to be measured, and the sliding rod The sensor is arranged on the guide portion in a movable manner relative to the guide portion; the sensing portion includes a photoelectric sensor arranged on the guide portion and a photoelectric sensor arranged on the floating portion and used to block the detection of the emission signal of the photoelectric sensor when the floating portion and the guide portion move relatively The photoelectric sensor forms an electrical signal based on the detector blocking the emission signal and sends the electrical signal to the control part, so that the control part controls the measuring lens to be away from the object to be measured. According to the present disclosure, it is possible to provide a protection device that is simple in structure and capable of protecting the measurement lens.

Description

Protective device for measuring instruments

technical field

The present disclosure relates to an intelligent manufacturing equipment industry, in particular to a protection device for measuring instruments.

Background technique

With the rapid development of computer measurement technology, measuring instruments for measuring the size of objects to be measured based on computer measurement technology have emerged. Usually, the measuring instrument used to measure the size of the object to be measured is an image measuring instrument. The image measuring instrument generally includes a measuring platform, a measuring lens, and a light source arranged at one end of the measuring lens and close to the measuring platform. The surface of the object to be measured is obtained through the measuring lens. image, and then analyze the surface image based on image processing technology to obtain the size of the object to be measured.

Generally speaking, in the process of measuring the object to be measured, it is necessary to control the movement of the measuring lens and/or the measuring platform so that the object to be measured is moved into the visible area of the measuring lens. However, in the process of measuring the object to be measured, if the operation is improper, the light source and the measurement platform may collide, which may affect the measurement accuracy of the measurement lens, and may even damage the measurement lens. Patent document (CN109489564A) discloses an image measuring instrument with automatic anti-collision function. In this patent document, an anti-collision monitoring structure is set to monitor whether the light source is collided. If the light source is collided, the anti-collision monitoring structure will obtain a collision Signal and control the light source to retreat to protect the measuring lens.

However, the above-mentioned anti-collision monitoring structure has a complex structure, and needs to be provided with a plurality of conductive sheets, a plurality of conductive balls, and a plurality of insulating components to form a plurality of normally closed conductive loops to monitor whether the light source is collided. In addition, in this patent document, when the light source is impacted, the separation of the conductive ball and the conductive sheet is used to control the retreat of the light source. When the light source retreats a safe distance, the conductive ball contacts the conductive ball. Abrasion is caused during the separation and contact of the conductive ball and the conductive sheet, so frequent maintenance of the conductive ball and the conductive sheet is required.

SUMMARY OF THE INVENTION

The present disclosure is proposed in view of the above-mentioned state of the prior art, and an object of the present disclosure is to provide a protection device with a simple structure and capable of protecting the measurement lens.

The present disclosure provides a protection device for a measuring instrument, which is a protection device for protecting a measuring lens of the measuring instrument during the process of measuring an object to be measured. The protection device includes: a guide part, a floating part, a sensor a part and a control part for controlling the movement of the measuring lens, the guiding part is arranged on the measuring lens and is used to guide the floating part to move in a preset direction; when measuring the object to be measured, at least one part of the floating part is A part is located between the measuring lens and the object to be measured, the floating part includes a sliding rod, a light source arranged on the sliding rod and located at one end of the measuring lens close to the object to be measured, the sliding rod The sensor is arranged on the guide portion in a movable manner relative to the guide portion; the sensing portion includes a photoelectric sensor arranged on the guide portion, and a photoelectric sensor arranged on the floating portion and connected between the floating portion and the guide portion. A detector for blocking the emission signal of the photoelectric sensor when the parts move relatively, the photoelectric sensor forms an electrical signal based on the detector blocking the emission signal, and sends the electric signal to the control part to make The control unit controls the measurement lens to be away from the object to be measured.

In this case, in the process of measuring the object to be measured by the measuring instrument, when the light source is subjected to an external force, the floating part will move in a preset direction, and the guiding part can guide the floating part to move in the preset direction, and at the same time drive the detector When the detector moves in the preset direction, when the detector blocks the invisible light path of the photoelectric sensor, it means that the floating part has moved the preset distance in the preset direction at this time, and the photoelectric sensor can form an electrical circuit based on the detector blocking the emission signal. Signal and send the electrical signal to the control unit, the control unit can control the measuring lens to keep away from the object to be measured based on the received electrical signal, and the protection device can realize the purpose of intelligently protecting the measuring lens, so that the light source will not be further squeezed and damaged , which can protect the measuring lens from being damaged so as to maintain the measuring accuracy of the measuring instrument.

In addition, in the protection device according to the present disclosure, optionally, the floating part further includes a first floating plate disposed on the outer periphery of the measuring lens, and a second floating plate disposed on the measuring lens for connecting A first fixing block of the sliding rod and the first floating plate, and a second fixing block for connecting the sliding rod and the second floating plate. In this case, the sliding rod can be installed between the first floating plate and the second floating plate by using the first fixing block and the second fixing block.

In addition, in the protection device according to the present disclosure, optionally, the detector is provided on the second fixing block. In this case, the detector can remain relatively stationary with the second fixed block, that is, it can remain relatively stationary with the floating part, and when the floating part moves a preset distance in a preset direction, the detector can follow moving.

In addition, in the protection device involved in the present disclosure, optionally, the light source is connected to the sliding rod through the second fixing block. In this case, the light source can be fixed on the sliding rod, and if the bottom of the light source receives external force from or the object to be measured, the floating part can move in a preset direction.

In addition, in the protection device according to the present disclosure, optionally, the guide portion includes a linear bearing, a bearing seat matched with the linear bearing, and a bearing seat connected to the bearing seat and located on the outer circumference of the measuring lens a fixing plate, the linear bearing is matched with the sliding rod so that the sliding rod can move relative to the guide part. In this case, the guide portion can maintain a relatively fixed state relative to the measuring lens, thereby providing a stable linear motion for the floating portion, whereby the floating portion can move more stably on the guide portion.

In addition, in the protection device according to the present disclosure, optionally, it further includes an elastic member for maintaining the floating portion to have a tensile force in a direction opposite to the preset direction, and one end of the elastic member is provided on the In the first floating plate, the other end of the elastic member is disposed on the fixed plate. In this case, in the process of measuring the object to be measured, the elastic member can always provide a slight downward pulling force for the floating part, even after the light source is collided due to abnormal factors, due to the pulling force of the elastic member, the floating part can be pulled down. Quickly return to the position of the initial state, further, to ensure the reliability of the measuring instrument.

In addition, in the protection device according to the present disclosure, optionally, the linear bearing has a first groove surrounding the linear bearing and used for mounting a first snap ring, and a first groove surrounding the linear bearing and used for mounting The second groove of the second snap ring, the linear bearing is arranged on the bearing seat through the first snap ring and the second snap ring. In this case, the linear bearing can be fixed to the bearing housing by providing the first retaining ring in the first groove and the second retaining ring in the second groove. No movement relative to the housing.

In addition, in the protection device according to the present disclosure, optionally, the floating portion further includes a first rubber pad and a second rubber pad, and the first rubber pad is disposed on the outer periphery of the sliding rod and located on the straight line Between the bearing and the first fixing block, the second rubber pad is arranged on the outer circumference of the sliding rod and is located between the linear bearing and the second fixing block. In this case, when the sliding rod moves relative to the linear bearing, the vibration of the floating portion caused by the movement can be reduced while the noise is reduced, so that the light source and the measuring lens can be further protected.

In addition, in the protection device according to the present disclosure, optionally, the photoelectric sensor is provided on the bearing seat. Thereby, the photoelectric sensor and the bearing seat can be kept relatively stationary.

In addition, in the protection device involved in the present disclosure, optionally, the light source is a ring light source. In this case, illumination light from multiple directions can be provided for the object to be measured, and stable brightness around the object to be measured can be maintained, thereby enabling the measurement lens to obtain image information with higher stability, which is conducive to improving the Imaging effects of graphics processing.

According to the present disclosure, it is possible to provide a protection device that is simple in structure and capable of protecting the measurement lens.

Description of drawings

The present disclosure will now be explained in further detail by way of example only with reference to the accompanying drawings.

FIG. 1 is a schematic diagram illustrating an application scenario of a measuring instrument involved in an example of the present disclosure.

FIG. 2 is a block diagram showing the structure of a measuring instrument according to an example of the present disclosure.

FIG. 3 is a schematic perspective view showing that the protection device involved in the example of the present disclosure cooperates with the measuring lens.

FIG. 4 is a schematic diagram illustrating a first viewing angle of the protective device according to an example of the present disclosure in cooperation with a measuring lens.

FIG. 5 is an enlarged partial cross-sectional view showing a protection device according to an example of the present disclosure.

FIG. 6 is an exploded schematic diagram illustrating a protection device according to an example of the present disclosure.

FIG. 7 is a schematic diagram illustrating a second viewing angle of the protective device according to an example of the present disclosure in cooperation with the measuring lens.

FIG. 8 is a flowchart illustrating a protection method involved in an example of the present disclosure.

Detailed ways

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals are assigned to the same components, and overlapping descriptions are omitted. In addition, the drawings are only schematic diagrams, and the ratios of the dimensions of the members, the shapes of the members, and the like may be different from the actual ones.

It should be noted that the terms "comprising" and "having" in the present disclosure and any modifications thereof, such as a series of steps or unit processes, methods, coordinate measuring devices, products or equipment included or included are not necessarily limited to clear Those steps or units are explicitly listed, but may include or have other steps or units not expressly listed or inherent to the process, method, product, or apparatus.

In addition, it should be noted that "upward", "upward", "downward", "downward", "up-down direction", "left", "leftward", "leftward", "upward", "upward", "upward", "upward", "upward" Left, Right, Right, Right, Right, Left, Left, Front, Front, Back, Back, Relative positional and relative orientation terms, such as "front-to-rear direction", refer to the usual operating posture and should not be considered limiting.

Embodiments of the present disclosure relate to a protection device for a measuring instrument, which can be used to protect a measuring lens of the measuring instrument. With the protection device according to the present embodiment, the probability of collision of the light source when measuring the size of the object to be measured can be effectively reduced, and the measuring lens can be protected so that the measuring instrument can maintain high measurement accuracy.

The protection device for the measuring instrument according to the present embodiment may be simply referred to as a protection device. In some examples, the protective device may be referred to as a crash device, a bumper device, or the like. In addition, each name is for showing the apparatus for a measuring instrument which concerns on this embodiment, and should not be construed as limiting.

FIG. 1 is a schematic diagram illustrating an application scenario of the measuring instrument 1 involved in the example of the present disclosure. FIG. 2 is a block diagram showing the structure of the measuring instrument 1 according to an example of the present disclosure.

The protection device 10 involved in this embodiment can be applied to a measuring instrument 1 for measuring the information of the object to be measured, for example, to measure the two-dimensional size, the three-dimensional size, the surface topography, and the like of the object to be measured. In some examples, the measuring instrument 1 may be any instrument that includes a measuring lens 20 (described later), especially an instrument where the measuring lens 20 needs to be moved in a direction perpendicular to the measuring platform 30 , for example, the measuring instrument 1 may be an image Measuring instrument, white light interferometer, or flash tester, etc.

Hereinafter, the protection device 10 according to the example of the present embodiment will be described by taking as an example that the measuring instrument 1 is a video measuring instrument. It should be noted that, for other measuring instruments 1 , those skilled in the art can protect the measuring lens 20 for other measuring instruments 1 with slight modification of the protection device 10 adopted by the image measuring instrument.

Referring to FIG. 1 , the protection device 10 according to this embodiment can be applied to an image measuring instrument. In some examples, the image measuring instrument can realize two-dimensional coordinate measurement of the object to be measured.

In some examples, the measurement instrument 1 may include a measurement lens 20 and a measurement platform 30 . Wherein, the measuring lens 20 can be used to obtain image information of the object to be measured. The measurement platform 30 can be used to carry the object to be measured.

In some examples, the measurement lens 20 may be substantially cylindrical.

In some examples, the measurement lens 20 may be close to the measurement platform 30 during the measurement of the object to be measured. The protection device 10 according to the present embodiment aims to reduce the probability that the light source 122 (described later) collides with the measurement platform 30 and/or the object to be measured when the measurement lens 20 is close to the measurement platform 30 . In this case, when the object to be measured is measured, the protection device 10 can protect the light source 122 from collision as much as possible, so as to protect the measurement lens 20 from damage to maintain the measurement accuracy of the measurement instrument 1 . In other words, the protection device 10 can be used to protect the measuring lens 20 of the measuring instrument 1 during the measurement of the object to be measured. In some examples, the protection device 10 also protects the light source 122 at the same time. Meanwhile, the protection device 10 according to this embodiment has a simple structure and is easy to implement.

Referring to FIG. 2 , in some examples, the protection device 10 may include a guide portion 110 , a floating portion 120 , and a sensing portion 130 . Wherein, the guide portion 110 may be used to guide the movement of the floating portion 120 . The floating part 120 may be used to move a preset distance on the guide part 110 when the light source 122 is acted by an external force. The sensing part 130 may be used to monitor the movement of the floating part 120 . In some examples, the protection device 10 may also include a control portion 140 . The control portion may be used to control the movement of the measurement lens 20 . In some examples, the control portion 140 may be an automatic control. In other examples, the control portion 140 may be a manual control.

In some examples, the preset distance may be related to the location where the sensing part 130 is set.

FIG. 3 is a schematic perspective view showing that the protection device 10 involved in the example of the present disclosure cooperates with the measuring lens 20 . FIG. 4 is a schematic diagram illustrating a first viewing angle of the protective device 10 according to an example of the present disclosure in cooperation with the measurement lens 20 . FIG. 5 is an enlarged partial cross-sectional view showing the protection device 10 according to an example of the present disclosure.

Referring to FIG. 3 , in the protection device 10 according to the present embodiment, the guide portion 110 may be provided on the measurement lens 20 . For example, the guide portion 110 may be provided on the outer circumference of the measurement lens 20 . In some examples, the guide portion 110 may be disposed on the outer circumference of the measurement lens 20 and close to one end of the measurement platform 30 . In other examples, the guide portion 110 may be disposed at any position on the outer circumference of the measuring lens 20 .

In some examples, the guide part 110 may be used to guide the floating part 120 to move in the preset direction D1. The preset direction D1 may be shown as D1 in FIG. 3 . In some examples, the preset direction D1 may be a direction perpendicular to the measurement platform 30 . For example, if the measuring platform 30 is arranged horizontally, the preset direction D1 may be a vertical direction. In some examples, the preset direction D1 may be a direction parallel to the central axis of the measurement lens 20 .

As described above, the guide portion 110 may be used to guide the movement of the floating portion 120 . In some examples, when the object to be measured is measured, at least a part of the floating part 120 may be located between the measurement lens 20 and the object to be measured. If at least a part of the floating portion 120 is in contact with the object to be measured or is pressed by the object to be measured, the floating portion 120 will move a predetermined distance in the predetermined direction D1 to keep the measuring lens 20 away from the object to be measured. In some examples, at least a portion of the floating portion 120 described above may be referred to as the light source 122 . In other examples, at least a portion of the floating portion 120 may include more components.

Referring to FIGS. 4 and 5 , in some examples, the floating part 120 may include a sliding rod 121 and a light source 122 . The sliding rod 121 may be used to cooperate with the guide portion 110 so that the floating portion 120 is movably disposed on the guide portion 110 . The light source 122 can be used to illuminate the object to be tested. Specifically, the light source 122 can provide illumination for the object to be tested and form an imaging effect that is beneficial to image processing to improve image stability.

FIG. 6 is an exploded schematic diagram illustrating the protection device 10 according to an example of the present disclosure.

Referring to FIG. 6, in some examples, the sliding rod 121 may have a cylindrical shape. Therefore, the sliding rod 121 can have less frictional resistance during the movement of the sliding rod 121 to make the movement of the sliding rod 121 smoother. In some examples, both ends of the sliding rod 121 may have threaded holes. In this case, the sliding rod 121 can be connected with other members of the floating part 120 through the fitting of the threaded holes (described in detail later).

In some examples, the floating portion 120 may include a plurality of sliding bars 121 . For example, the slide bar 121a and the slide bar 121b as shown in FIG. 6 may be included. In other examples, the floating part 120 may include a plurality of sliding rods 121 such as 3, 4, 5, 6 and so on. When the floating part 120 includes a plurality of sliding rods 121 , the plurality of sliding rods 121 can be symmetrically arranged around the outer circumference of the measuring lens 20 , and the guide part 110 can also include a plurality of sliding rails matching the plurality of sliding rods 121 . In this case, when the floating part 120 moves, a higher balance can be maintained to protect the measuring lens 20 from being impacted as much as possible. In other examples, the plurality of sliding rods 121 may not be arranged symmetrically.

In some examples, the floating part 120 may further include a first fixing block 123 and a second fixing block 124 . For the convenience of description, the two ends of the sliding rod 121 may be the first end and the second end, respectively, the first fixing block 123 may be disposed at the first end, and the second fixing block 124 may be disposed at the second end.

As described above, both ends of the sliding rod 121 may have screw holes. In some examples, the first end can have a first threaded hole and the second end can have a second threaded hole. The first fixing block 123 can be fixed on the first end by the first fixing member, and the second fixing block 124 can be fixed on the second end by the second fixing member. The first fixing member and the second fixing member may be bolts or screws. In some examples, the first fixing block 123 may have a through hole matching the first fixing member, and the second fixing block 124 may have a through hole matching the second fixing member. In this case, the first fixing piece can pass through the first fixing block 123 and fix the first fixing block 123 to the first end, and the second fixing piece can pass through the second fixing block 124 and fix the second fixing block 124 fixed to the second end.

In some examples, the first fixing block 123 and the second fixing block 124 may have the same shape and height. For example, it may be substantially cylindrical, prismatic, or other columnar shapes with irregular shapes.

In some examples, when the floating part 120 includes a plurality of sliding rods 121 , it can also include a plurality of first fixing blocks 123 and a plurality of second fixing blocks 124 matching with the plurality of sliding rods 121 . Referring to FIG. 6 , the floating part 120 may include two sliding bars 121 . Specifically, a sliding rod 121a and a sliding rod 121b may be included. At this time, the floating portion 120 may further include a first fixing block 123a1 and a second fixing block 124a2 disposed at both ends of the sliding rod 121a, and a first fixing block 123b1 and a second fixing block 124b2 disposed at both ends of the sliding rod 121b.

Referring to FIG. 6 , in some examples, the floating part 120 may further include a first floating plate 127 disposed on the outer circumference of the measuring lens 20 , a second floating plate 128 disposed on the measuring lens 20 , for connecting the sliding rod 121 and the first floating plate The first fixing block 123 of the board 127 and the second fixing block 124 for connecting the second floating board 128 . In this case, the sliding rod 121 can be installed between the first floating plate 127 and the second floating plate 128 by using the first fixing block 123 and the second fixing block 124 .

In some examples, the first floating plate 127 can be connected with the sliding rod 121 through the first fixing block 123 , and the second sliding plate can be connected with the sliding rod 121 through the second fixing block 124 , so that the plurality of sliding rods 121 can be synchronized sex.

In some examples, the floating part 120 may further include a first floating plate 127 . The first floating plate 127 may be used to connect a plurality of first fixing blocks 123 . Thereby, the plurality of sliding rods 121 can have synchronization in movement. The first floating plate 127 may be disposed on the outer circumference of the measuring lens 20 . Specifically, the first floating plate 127 may have an inner surface matching the outer surface of the measurement lens 20 . Therefore, the first floating plate 127 can have a high degree of matching with the measurement lens 20 . In some examples, the floating portion 120 may also include a second floating plate 128 . The second floating plate 128 may be used to connect a plurality of second fixing blocks 124 . The second floating plate 128 may be disposed on the outer circumference of the measuring lens 20 . Specifically, the second floating plate 128 may have an inner surface matching the outer surface of the measurement lens 20 . Therefore, the second floating plate 128 can have a high degree of matching with the measuring lens 20 .

In some examples, the first fixing block 123 and the first floating plate 127 may be connected together by welding or sticking. In other examples, the first fixing block 123 and the first floating plate 127 may be integrally formed. In some examples, the second fixing block 124 and the second floating plate 128 may be connected together by welding, sticking, or snapping. In other examples, the second fixing block 124 and the second floating plate 128 may be integrally formed.

In some examples, the light source 122 may be disposed on the sliding rod 121 and at the end of the measuring lens 20 close to the object to be measured. In some examples, the light source 122 may be connected with the second fixing block 124 . That is, the light source 122 may be connected with the sliding rod 121 through the second fixing block 124 . In this case, the light source 122 can be fixed to the sliding rod 121, and if the bottom of the light source 122 receives external force from the measurement platform 30 and/or the object to be measured, the floating part 120 can move in the preset direction D1.

In some examples, when measuring the object to be measured, the light source 122 may be located between the measurement lens 20 and the object to be measured. Alternatively, the light source 122 may be located between the measurement lens 20 and the measurement platform 30 . In some examples, the light source 122 may be located between the measurement lens 20 and the measurement platform 30 whether or not the object to be measured is measured. When the bottom of the light source 122 (ie, the part close to the measurement platform 30 and/or the object to be measured) is subjected to an external force, it can be considered that the light source 122 and the measurement platform 30 and/or the object to be measured are squeezed. At this time, the floating portion 120 will move a preset distance in the preset direction D1 to protect the light source 122 from being further squeezed, thereby protecting the measuring lens 20 .

In some examples, the light source 122 may be provided with a feedback stroke. The light source 122 may have a self-protection mechanism within the feedback stroke. In this case, even if the light source 122 is squeezed by an external force, it will not be damaged. The protection device 10 according to the present embodiment can protect the light source 122 from being squeezed further, that is, can prevent the light source 122 from being squeezed outside the feedback stroke. Thereby, it is possible to protect the measurement lens 20 while protecting the light source 122 .

As described above, the sliding rod 121 may be provided with the light source 122 . In other words, in some examples, the light source 122 may be disposed on the sliding rod 121 . Light source 122 may be used to illuminate the target part. In some examples, the light source 122 can also be used to overcome the interference of ambient brightness to maintain a stable brightness around the object to be tested. In this case, the measurement lens 20 can obtain image information with higher stability, which is beneficial to improve the imaging effect of graphics processing, and further reduces the complexity of the computing system of the measurement instrument 1 .

In some examples, light source 122 may be a ring light source. The light source 122 may have a bottom surface light source and a side surface light source formed around the bottom surface light source. In this case, illumination light from multiple directions can be provided for the object to be measured, and stable brightness around the object to be measured can be maintained. Therefore, the measurement lens 20 can obtain image information with higher stability, which is beneficial to Improve the imaging effect of graphics processing. In some examples, the bottom surface light source may be circular, rectangular, or any irregular shape. In some examples, the bottom surface light source may have a through hole through which the measurement lens 20 passes. Therefore, the measuring lens 20 can pass through the bottom light source, and obtain stable image information of the DUT under the illumination of the light source 122 .

As described above, the guide portion 110 may be used to guide the floating portion 120 to move in the preset direction D1. In some examples, the sliding rod 121 may be disposed on the guide portion 110 . In other examples, the sliding rod 121 may be disposed on the guide part 110 in a movable manner relative to the guide part 110 .

In some examples, the guide part 110 may include a sliding track arranged in a preset direction D1. Thus, the guide portion 110 can provide a guide trajectory in the preset direction D1. In some examples, the sliding track can provide linear motion. In other examples, the sliding track may provide curvilinear motion.

Specifically, in some examples, the guide part 110 may include a linear bearing 111 and a bearing seat 112 matched with the linear bearing 111 . Linear bearing 111 may be a system that can provide linear motion. In some examples, the linear motion provided by the linear bearing 111 may have less frictional resistance and more precise and smooth linear motion. Thereby, the floating part 120 can move on the guide part 110 more stably. In some examples, linear bearing 111 may be a cylindrical shaft.

In some examples, the linear bearing 111 may be provided on the bearing housing 112 . Specifically, in some examples, the linear bearing 111 may have a first groove 114 surrounding the linear bearing 111 for mounting the first circlip 116 and a groove surrounding the linear bearing 111 for mounting the second circlip 117 The second groove 115 and the linear bearing 111 can be disposed on the bearing seat 112 through the first snap ring 116 and the second snap ring 117 . In this case, the linear bearing 111 can be fixed to the bearing housing 112 by providing the first retaining ring 116 in the first groove 114 and the second retaining ring 117 in the second groove 115, so that the linear bearing 111 can be fixed to the bearing housing 112, in other words , through the above arrangement, the linear bearing 111 will not move relative to the bearing seat 112 .

As described above, the guide portion 110 may include a plurality of sliding rails matched with the plurality of sliding rods 121 . Referring to FIG. 6, in some examples, the guide portion 110 may include two sliding rails. Specifically, a linear bearing 111a and a bearing seat 112a matched with the linear bearing 111, and a linear bearing 111b and a bearing seat 112b matched with the linear bearing 111 may be included. The relevant cooperation relationship and connection relationship can be as described above, and will not be repeated here.

FIG. 7 is a schematic diagram illustrating a second angle of view in which the protection device 10 according to the example of the present disclosure cooperates with the measurement lens 20 .

In some examples, the measuring instrument 1 may further include a fixing fixture 40 for fixing the measuring lens 20 . Referring to FIG. 3 , specifically, the fixing fixture 40 may include a first fixing seat 410 , a first clamping block 420 matched with the first fixing seat 410 , a second fixing seat 430 , and a second fixing seat 430 matching The second clamping block 440 . Wherein, the first fixing base 410 and the first clamping block 420 may be disposed at one end of the measurement lens 20 away from the measurement platform 30 for clamping the measurement lens 20 . The second fixing seat 430 and the second clamping block 440 may be disposed at one end of the measurement lens 20 close to the measurement platform 30 for clamping the measurement lens 20 . In other examples, the second fixing base 430 and the second clamping block 440 may also be arranged at any position on the outer circumference of the measuring lens 20 . In some examples, the second fixing seat 430 and the second clamping block 440 may be fixed to the Z-axis moving part (described later).

In some examples, the guide portion 110 may further include a fixing plate 113 . The fixing plate 113 can be connected with the bearing seat 112 and located on the outer periphery of the measuring lens 20 . In some examples, the fixing plate 113 may be used to connect a plurality of bearing blocks 112, for example, the bearing blocks 112a and 112b (see FIG. 6) may be connected. In other examples, the bearing housing 112a and the bearing housing 112b and the fixing plate 113 may be integrally formed. In some examples, the fixing plate 113 may be fixed to the fixing base 410 for clamping the measuring lens 20 . In this case, the guide portion 110 can maintain a relatively fixed state with respect to the measuring lens 20 , so as to provide a stable linear motion for the floating portion 120 .

As described above, the second fixing seat 430 and the second clamping block 440 may be fixed to the Z-axis moving part. In some examples, the Z-axis moving part may move in a preset direction D1 and a direction opposite to the preset direction D1. The measuring lens 20 may be fixed to the Z-axis moving part through the second fixing seat 430 and the second clamping block 440 . Through the movement of the Z-axis moving part, the measuring lens 20 can be driven to move, for example, approaching or moving away from the object to be measured.

In some examples, the second fixing base 430 and the second clamping block 440 may be fixed to any component that is relatively stationary with respect to the Z-axis moving part.

In some examples, the bearing block 112 may be fixedly connected with the second mounting block 430 . In other words, during the movement of the measurement lens 20, the bearing base 112 and the measurement lens 20 may not move relative to each other.

In some examples, the second fixing seat 430 and the second clamping block 440 may be included in the guide portion 110 . In this case, the second fixing seat 430 can provide a stable base for the installation of the linear bearing 111 and the bearing seat 112 , so that the bearing seat 112 and the measuring lens 20 will not move relative to each other.

In some examples, the linear bearing 111 may cooperate with the sliding rod 121 so that the sliding rod 121 can move relative to the guide portion 110 . In this case, the sliding rod 121 can move in the predetermined direction D1 relative to the linear bearing 111 , and thus the floating part 120 can move relative to the guide part 110 .

Referring to FIGS. 5 and 6 , in some examples, the floating part 120 may further include a first rubber pad 125 and a second rubber pad 126 . Wherein, both the first rubber pad 125 and the second rubber pad 126 may be disposed on the outer circumference of the sliding rod 121 . In some examples, the first rubber pad 125 and the second rubber pad 126 can be used to reduce the vibration of the floating part 120 during the movement, that is, can play a role of shock absorption. In some examples, the first rubber pad 125 and the second rubber pad 126 can also reduce the noise caused by the floating part 120 in the process of moving, that is, can play the role of noise reduction. When a plurality of sliding rods 121 are included, a plurality of first rubber pads 125 and a plurality of second rubber pads 126 matching with the plurality of sliding rods 121 may also be included, which will not be repeated here.

In some examples, the first rubber pad 125 may be disposed on the outer circumference of the sliding rod 121 and between the linear bearing 111 and the first fixing block 123 , and the second rubber pad 126 may be disposed on the outer circumference of the sliding rod 121 and located between the linear bearing 111 and the first fixed block 123 . between the two fixed blocks 124 . In this case, when the sliding rod 121 moves relative to the linear bearing 111 , the vibration of the floating portion 120 caused by the movement can be reduced as much as possible while reducing noise, thereby further protecting the light source 122 and the measuring lens 20 .

As described above, the protection device 10 according to the present embodiment further includes the sensor unit 130 . The sensing part 130 may be used to monitor whether the floating part 120 moves. In some examples, the sensing portion 130 may include a photosensor 131 and a detector 132 . Among them, the photoelectric sensor 131 can be used to send out the emission signal. The detector 132 can be used to block the emission signal of the photoelectric sensor 131 . In addition, the photoelectric sensor 131 can also be used to receive the transmission signal interrupted by the detector 132 .

In some examples, the photosensor 131 may be any device that can emit optical signals, radar signals, or electronic signals, or the like. For example, the photo sensor 131 may be a photo switch. In some examples, the transmitted signal may be a signal such as an optical signal, a radar signal, or an electronic signal. In some examples, detector 132 can be any device that can reflect (or block) any of the above-described signals. The detector 132 may also be referred to as an optical isolator.

In the protection device 10 according to the present embodiment, the photoelectric sensor 131 can block the emission signal based on the detector 132 to form an electrical signal and send the electrical signal to the control unit 140 so that the control unit 140 can control the measuring lens 20 away from the object to be measured. For example, in some examples, the detector 132 can block the invisible light path of the photoelectric sensor 131, so that the photoelectric sensor 131 emits different high or low frequency electrical signals to the control part 140, and the control part 140 receives the corresponding electrical signals and can control the The measuring lens 20 is kept away from the object to be measured, so as to protect the measuring lens 20 and the measuring process safely and reliably.

In some examples, the photosensor 131 may be disposed on the guide portion 110 . In some examples, the detector 132 may be disposed on the floating portion 120 . In this case, if the floating portion 120 moves relative to the guide portion 110 by a predetermined distance, the detector 132 can block the emission signal of the photoelectric sensor 131 . In other words, the detector 132 may be disposed on the floating portion 120 and block the emission signal of the photoelectric sensor 131 when the floating portion 120 and the guide portion 110 move relatively. As a result, it can be determined that the floating portion 120 has moved relative to the guide portion 110 based on the detector 132 blocking the emission signal. Specifically, as described above, in some examples, the detector 132 can block the invisible light path of the photoelectric sensor 131 , so that the photoelectric sensor 131 emits different high or low frequency electrical signals to the control unit 140 .

As shown in FIG. 7 , in some examples, the photosensor 131 may be disposed on the bearing housing 112 . Accordingly, the photoelectric sensor 131 and the bearing seat 112 can be kept relatively stationary.

In some examples, the detector 132 may be disposed on the second fixed block 124 . In this case, the detector 132 can maintain a relatively static state with the second fixing block 124 , that is, can maintain a relatively static state with the floating part 120 , when the floating part 120 moves a preset distance in the preset direction D1 , the detector 132 can follow the movement. In other examples, the detector 132 may also be disposed on any component of the floating portion 120 .

In this embodiment, the photoelectric sensor 131 may form an electrical signal based on the detector 132 blocking the emission signal. The protection device 10 can control the measuring lens 20 to move away from the object to be measured based on the electrical signal. Specifically, in some examples, the protection device 10 may further include a control part 140 . The control part 140 can be used to control the measuring lens 20 to move away from or close to the object to be measured. For example, when the object to be measured is measured, the control unit 140 may control the measurement lens 20 to approach the object to be measured so that the object to be measured enters the measurement field of view of the measurement lens 20 . After the measurement, the measuring lens 20 can be controlled to be away from the object to be measured. In some examples, the control part 140 may also control the measuring lens 20 to move away from the object to be measured when the light source 122 is impacted. In other words, when the floating part 120 moves a preset distance in the preset direction D1, the control part 140 can control the measuring lens 20 to move away from the object to be measured.

In some examples, the photosensor 131 may send electrical signals to the control part 140 . The control unit 140 can control the measurement lens 20 to move away from the object to be measured based on the received electrical signal. Thereby, the protection device 10 can protect the measurement lens 20 . In some examples, controlling the measuring lens 20 away from the object to be measured also controls the light source 122 away from the object to be measured.

In some examples, the protection device 10 may further include an elastic member 150 for maintaining the floating part 120 to have a pulling force in a direction opposite to the preset direction D1, one end of the elastic member 150 may be disposed on the first floating plate 127, and the elastic member The other end of 150 is disposed on the fixing plate 113 . In some examples, the direction opposite to the preset direction D1 may be a vertically downward direction. In this case, in the process of measuring the object to be measured, the elastic member 150 can always provide a slight downward pulling force for the floating part 120, even if the light source 122 is collided due to abnormal factors, due to the pulling force of the elastic member 150, The floating portion 120 can be quickly returned to the position of the initial state, and further, the reliability of the measuring instrument 1 can be ensured.

In some examples, the initial position may be the position when the floating portion 120 is not moved.

In some examples, if the protective device 10 includes only one sliding bar 121 , the protective device 10 may not include the first floating plate 127 , the second floating plate 128 , and the fixing plate 113 . In some examples, the protection device 10 may further include an elastic member 150 for maintaining the floating portion 120 with a tensile force in the preset direction D1 (for the sake of clarity of drawing, some drawings use a simple drawing method), if the protection device 10 only It includes a sliding rod 121 , one end of the elastic member 150 can be set on the first fixing block 123 , and the other end of the elastic member 150 can be set on the bearing seat 112 .

FIG. 8 is a flowchart illustrating a protection method involved in an example of the present disclosure.

This embodiment also discloses a method for protecting the measurement lens 20 . Referring to FIG. 8 , the method for protecting the measurement lens 20 may include: if the light source 122 is subjected to an external force, the floating part 120 moves in a preset direction D1 (step S200 ); the sensing part 130 monitors the movement signal of the floating part 120 , and responds to the transmission The sensing part 130 monitors the movement signal of the floating part 120 and sends an electrical signal to the control part 140 (step S400 ), and the control part 140 controls the measurement lens 20 to move away from the measurement platform 30 (step S600 ).

According to the present disclosure, when the measuring instrument 1 measures the information of the object to be measured, when the measuring lens 20 is close to the object to be measured, if the light source 122 comes into contact with the measuring lens 20 and receives an external force within the feedback stroke range, the floating part 120 will Moving in the preset direction D1, when the detector 132 blocks the invisible light path of the photoelectric sensor 131, it means that the floating part 120 has moved in the preset direction D1 at this time, and the photoelectric sensor 131 can block the emission based on the detector 132. signal to form an electrical signal and send the electrical signal to the control unit 140, the control unit 140 can control the measuring lens 20 to keep away from the object to be measured based on the received electrical signal, and the protection device 10 can realize the purpose of intelligently protecting the measuring lens 20, thus, The light source 122 will not be further crushed and damaged, so that the measuring lens 20 can be protected from damage and the measurement accuracy of the measuring instrument 1 can be maintained.

While the disclosure has been specifically described above in conjunction with the accompanying drawings and examples, it is to be understood that the above description does not limit the present disclosure in any way. Those skilled in the art can make modifications and changes of the present disclosure as required without departing from the essential spirit and scope of the present disclosure, and these modifications and changes all fall within the scope of the present disclosure.

Claims (10)

1. A protection device for a measuring instrument, a protection device for protecting a measuring lens of the measuring instrument in the process of measuring the object to be measured, wherein the protection device comprises: a guide portion, a floating portion , a sensing part and a control part for controlling the movement of the measuring lens, the guiding part is arranged on the measuring lens and is used to guide the floating part to move in a preset direction; when measuring the object to be measured, the floating part At least a part of the part is located between the measuring lens and the object to be measured, the floating part includes a sliding rod, a light source arranged on the sliding rod and located at one end of the measuring lens close to the object to be measured, so The sliding rod is arranged on the guide portion in a movable manner relative to the guide portion; the sensing portion comprises a photoelectric sensor arranged on the guide portion and a photoelectric sensor arranged on the floating portion and connected between the floating portion and the guide portion. A detector for blocking the emission signal of the photoelectric sensor when the guide part moves relatively, the photoelectric sensor forms an electrical signal based on the detector blocking the emission signal and sends the electric signal to the control part so that the control part controls the measurement lens away from the object to be measured. 2. The protection device according to claim 1, characterized in that, The floating part further includes a first floating plate arranged on the outer circumference of the measuring lens, a second floating plate arranged on the measuring lens, and a first fixing block for connecting the sliding rod and the first floating plate , and a second fixing block for connecting the sliding rod and the second floating plate. 3. The protection device according to claim 2, characterized in that, The detector is arranged on the second fixed block. 4. The protection device according to claim 2, characterized in that, The light source is connected with the sliding rod through the second fixing block. 5. The protection device according to claim 2, characterized in that, The guide part includes a linear bearing, a bearing seat matched with the linear bearing, and a fixing plate connected with the bearing seat and located on the outer circumference of the measuring lens, the linear bearing is matched with the sliding rod to make all the The sliding rod is movable relative to the guide portion. 6. The protection device according to claim 5, characterized in that, It also includes an elastic member for maintaining the floating portion to have a tensile force in a direction opposite to the preset direction, one end of the elastic member is provided on the first floating plate, and the other end of the elastic member is provided on the the fixed plate. 7. The protection device according to claim 5, characterized in that, The linear bearing has a first groove surrounding the linear bearing for mounting a first snap ring and a second recess surrounding the linear bearing for mounting a second snap ring, the linear bearing passing through The first snap ring and the second snap ring are arranged on the bearing seat. 8. The protection device according to claim 5, characterized in that, The floating part further includes a first rubber pad and a second rubber pad, the first rubber pad is arranged on the outer circumference of the sliding rod and is located between the linear bearing and the first fixing block, the second rubber pad The pad is arranged on the outer circumference of the sliding rod and is located between the linear bearing and the second fixing block. 9. The protection device according to claim 5, characterized in that, The photoelectric sensor is arranged on the bearing seat. 10. The protection device according to claim 1, characterized in that, The light source is a ring light source.

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