CN115096182A - Protective device for a measuring instrument - Google Patents

Abstract

The present disclosure describes a protection device for a measurement instrument, the protection device comprising: the device comprises a guide part, a floating part, a sensing part and a control part for controlling the movement of a measuring lens, wherein the guide part is arranged on the measuring lens and is used for guiding the floating part to move in a preset direction; when an object to be measured is measured, at least one part of the floating part is positioned between the measuring lens and the object to be measured, the floating part comprises a sliding rod and a light source which is arranged on the sliding rod and positioned at one end of the measuring lens close to the object to be measured, and the sliding rod is arranged on the guide part in a manner of moving relative to the guide part; the sensing part comprises a photoelectric sensor arranged on the guide part and a detector arranged on the floating part and used for cutting off an emission signal of the photoelectric sensor when the floating part and the guide part move relatively, the photoelectric sensor forms an electric signal based on the emission signal cut off by the detector and sends the electric signal to the control part so that the control part controls the measuring lens to be far away from an object to be measured. According to the present disclosure, a protection device that is simple in structure and can protect a measurement lens can be provided.

Description

Protective device for a measuring instrument

Technical Field

The present disclosure relates to an intelligent manufacturing equipment industry, and more particularly, to a protection device for a measurement instrument.

Background

With the rapid development of computer measurement technology, measuring instruments for measuring the size of an object to be measured rely on the computer measurement technology. Generally, a measuring instrument for measuring the size of an object to be measured is an image measuring instrument, which generally includes a measuring platform, a measuring lens, and a light source disposed at one end of the measuring lens and close to the measuring platform, and obtains a surface image of the object to be measured through the measuring lens, and then analyzes the surface image based on an image processing technique to obtain the size of the object to be measured.

Generally, in the process of measuring the object to be measured, the movement of the measuring lens and/or the measuring platform needs to be controlled so that the object to be measured moves into the visible area of the measuring lens. However, in the process of measuring the object to be measured, if the operation is not proper, the light source and the measuring platform may collide, the measurement accuracy of the measuring lens may be affected, and the measuring lens may be damaged. Patent document (CN109489564A) discloses an image measuring instrument with an automatic anti-collision function, in which an anti-collision monitoring structure is provided to monitor whether a light source is collided, and if the light source is collided, the anti-collision monitoring structure obtains a collision signal and controls the light source to retreat to protect a measuring lens.

However, the above-mentioned anti-collision monitoring structure has a complex structure, and a plurality of conductive sheets, a plurality of conductive balls, and a plurality of insulating members are required to form a plurality of normally closed circuits to monitor whether the light source is collided. In addition, in this patent document, when the light source is collided, the retraction of the light source is controlled by the separation of the conductive ball and the conductive sheet, and after the light source is retracted by a safe distance, the conductive ball and the conductive ball are contacted. Abrasion is caused during the separation and contact of the conductive balls and the conductive sheets, and thus frequent maintenance of the conductive balls and the conductive sheets is required.

Disclosure of Invention

The present disclosure has been made in view of the above-described state of the art, and an object thereof is to provide a protection device that has a simple structure and can protect a 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 in a process of measuring an object to be measured, the protection device comprising: the device comprises a guide part, a floating part, a sensing part and a control part for controlling the movement of the measuring lens, wherein the guide part is arranged on the measuring lens and is used for guiding the floating part to move in a preset direction; when the object to be measured is measured, at least one part of the floating part is positioned between the measuring lens and the object to be measured, the floating part comprises a sliding rod and a light source which is arranged on the sliding rod and positioned at one end of the measuring lens close to the object to be measured, and the sliding rod is arranged on the guide part in a manner of moving relative to the guide part; the sensing portion including set up in the photoelectric sensor of guide part with set up in the floating portion with be used for cutting off during the guide part relative movement photoelectric sensor's transmitted signal's detector, photoelectric sensor is based on the detector cuts off transmitted signal and formation signal of telecommunication and with signal of telecommunication send to the control part is so that the control part control measuring lens keeps away from the determinand.

Under the condition, in the process that the measuring instrument measures the object to be measured, when the light source is subjected to external force, the floating part can move in the preset direction, the guide part can guide the floating part to move in the preset direction and simultaneously drive the detector to move in the preset direction, when the detector cuts off an invisible light path of the photoelectric sensor, the floating part is shown to move in the preset direction for the preset distance at the moment, the photoelectric sensor can form an electric signal based on the cut-off emission signal of the detector and send the electric signal to the control part, the control part can control the measuring lens to be far away from the object to be measured based on the received electric signal, and the protection device can achieve the purpose of intelligently protecting the measuring lens, so that the light source cannot be further extruded to be damaged, and the measuring lens can be protected from being damaged, and the measuring accuracy of the measuring instrument can be kept.

In the protection device according to the present disclosure, the floating portion may further include a first floating plate provided on an outer periphery of the measurement lens, a second floating plate provided on the measurement lens, a first fixed block for connecting the slide rod and the first floating plate, and a second fixed block for connecting the slide rod and the second floating plate. In this case, the slide bar can be mounted between the first floating plate and the second floating plate by the first fixed block and the second fixed block.

In addition, in the protection device according to the present disclosure, the probe may be optionally disposed on the second fixed block. In this case, the probe can be maintained in a relatively stationary state with the second fixed block, that is, in a relatively stationary state with the floating portion, and the probe can follow the movement when the floating portion moves a preset distance in a preset direction.

In addition, in the protection device according to 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 to the sliding bar, and the floating portion can be moved in a predetermined direction if the bottom of the light source receives an external force from or to the object.

In addition, in the protection device according to the present disclosure, the guide portion may optionally include a linear bearing, a bearing seat that is fitted to the linear bearing, and a fixing plate that is connected to the bearing seat and is located on an outer periphery of the measurement lens, and the linear bearing may be fitted to the slide rod so that the slide rod is movable relative to the guide portion. In this case, the guide portion can be kept in a relatively fixed state with respect to the measuring lens, and thus a stable linear motion can be provided to the floating portion, whereby the floating portion can be moved more stably in the guide portion.

In addition, the protection device according to the present disclosure may further include an elastic member for holding the floating portion to have a tensile force in a direction opposite to the predetermined direction, wherein one end of the elastic member is provided to the first floating plate, and the other end of the elastic member is provided to the fixed plate. In this case, the elastic member can always provide a downward light tensile force to the floating portion in the process of measuring the object to be measured, and even if the light source is collided due to an abnormal factor, the floating portion can be quickly returned to the position of the initial state due to the tensile force of the elastic member, and further, the reliability of the measuring instrument is ensured.

In addition, in the protection device according to the present disclosure, the linear bearing may have a first groove surrounding the linear bearing and for mounting a first circlip, and a second groove surrounding the linear bearing and for mounting a second circlip, and the linear bearing may be provided to the bearing housing via the first circlip and the second circlip. In this case, the linear bearing can be fixed to the bearing housing by providing the first circlip in the first groove and the second circlip in the second groove, and in other words, the linear bearing does not move relative to the bearing housing by the above arrangement.

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, the first rubber pad is disposed on the outer periphery of the sliding rod and located between the linear bearing and the first fixed block, and the second rubber pad is disposed on the outer periphery of the sliding rod and located between the linear bearing and the second fixed block. In this case, when the slide rod moves relative to the linear bearing, the vibration of the floating portion due to the movement can be reduced while reducing noise, and the light source and the measurement lens can be further protected.

In addition, in the protection device according to the present disclosure, the photoelectric sensor may be provided in the bearing housing. Thereby, the photoelectric sensor can be kept in a relatively stationary state with respect to the bearing housing.

In addition, in the protection device according to the present disclosure, optionally, the light source is a ring light source. Under the condition, the illumination light from multiple directions can be provided for the object to be measured, and the stable brightness of the periphery of the object to be measured can be kept, so that the measuring lens can obtain image information with higher stability, and the imaging effect of graphic processing can be improved.

According to the present disclosure, a protection device that is simple in structure and can protect a measurement lens can be provided.

Drawings

The 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 measurement instrument according to an example of the present disclosure.

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

Fig. 3 is a perspective view illustrating a protection device according to an example of the present disclosure in cooperation with a measurement lens.

Fig. 4 is a schematic diagram illustrating a first viewing angle at which a protection device according to an example of the present disclosure is fitted to a measurement lens.

Fig. 5 is a partially sectional enlarged view showing a protection device according to an example of the present disclosure.

Fig. 6 is an exploded schematic view showing a protection device according to an example of the present disclosure.

Fig. 7 is a schematic diagram illustrating a second viewing angle at which a protection device according to an example of the present disclosure is fitted to a measurement lens.

Fig. 8 is a flow chart illustrating a protection method according to an example of the present disclosure.

Detailed Description

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic and the ratio of the dimensions of the components and the shapes of the components may be different from the actual ones.

It is noted that the terms "comprises" and "comprising," and any variations thereof, in this disclosure, such as a process, method, coordinate measurement device, article, or apparatus that comprises or has a list of steps or elements, is not necessarily limited to those steps or elements expressly listed, but may include or have other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In addition, it should be noted that relative position and relative direction terms such as "above", "upward", "below", "downward", "up-down direction", "left", "right", "left-right direction", "front", "rear", "front-rear direction" and the like in this document refer to a normal operation posture and should not be considered as restrictive.

Embodiments of the present disclosure relate to a protection device for a measuring instrument, which may be used to protect a measuring lens of the measuring instrument. Through the protection device related to the embodiment, the probability of collision of the light source during measurement of 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 measuring precision.

The protection device for a 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 bump guard, a bumper, or the like. Note that the names are for showing the device for the measuring instrument according to the present embodiment, and should not be construed as limiting.

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

The protection device 10 according to the present embodiment can be applied to the measurement instrument 1 for measuring information of an object to be measured, for example, a two-dimensional size, a three-dimensional size, a surface topography, and the like of the object to be measured. In some examples, the measurement instrument 1 may be any instrument including a measurement lens 20 (described later), particularly an instrument in which the measurement lens 20 needs to be moved in a direction perpendicular to the measurement platform 30, for example, the measurement instrument 1 may be an image measuring instrument, a white light interferometer, or a flash meter or the like.

Hereinafter, the protection device 10 according to the present embodiment will be described by taking the measurement instrument 1 as an image measuring instrument as an example. It should be noted that, for other measuring instruments 1, a person skilled in the art can protect the measuring lens 20 of the other measuring instruments 1 by slightly modifying the protection device 10 used by the image measuring instrument.

Referring to fig. 1, the protection device 10 according to the present embodiment can be applied to an image measuring instrument. In some examples, the image measuring apparatus may implement 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. The measuring lens 20 may be used to obtain image information of the object. The measurement platform 30 may be used to carry an 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 measurement of the object. The protection device 10 according to the present embodiment is intended to reduce the probability of collision between the light source 122 (described later) and the measurement platform 30 and/or the object to be measured when the measurement lens 20 approaches the measurement platform 30. In this case, the protection device 10 can protect the light source 122 from the collision as much as possible when measuring the object to be measured, and thus can protect the measurement lens 20 from being damaged to maintain the measurement accuracy of the measurement instrument 1. In other words, the protection device 10 can be used to protect the measurement lens 20 of the measurement instrument 1 during measurement of an object to be measured. In some examples, the protection device 10 also protects the light source 122. Meanwhile, the protection device 10 according to the present embodiment is simple in structure and easy to implement.

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

In some examples, the preset distance may be related to a position where the sensing part 130 is disposed.

Fig. 3 is a perspective view schematically illustrating the protection device 10 according to the example of the present disclosure in cooperation with the measurement lens 20. Fig. 4 is a schematic diagram illustrating a first viewing angle at which the protection device 10 according to the example of the present disclosure is fitted to the measurement lens 20. Fig. 5 is an enlarged partial cross-sectional view showing the protection device 10 according to the 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 110 may be provided at the outer periphery of the measurement lens 20. In some examples, the guide 110 may be disposed at an end of the measuring lens 20 near the measuring platform 30. In other examples, the guide 110 may be disposed at any position on the outer circumference of the measurement lens 20.

In some examples, the guide portion 110 may be used to guide the floating portion 120 to move in the preset direction D1. The preset direction D1 may be as shown by 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 horizontally disposed, 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 part 110 may serve to guide the movement of the floating part 120. In some examples, at least a portion of the floating portion 120 may be located between the measurement lens 20 and the object to be measured when measuring the object to be measured. If at least a portion of the floating portion 120 contacts with or is pressed by the object, the floating portion 120 moves a predetermined distance in a predetermined direction D1 to move the measuring lens 20 away from the object. In some examples, at least a portion of the floating portion 120 may be referred to as a light source 122. In other examples, at least a portion of the float 120 may include more components.

Referring to fig. 4 and 5, in some examples, the float 120 may include a sliding bar 121 and a light source 122. Among them, the sliding rod 121 may be used to cooperate with the guide part 110 so that the floating part 120 is movably disposed to the guide part 110. Light source 122 may be used to illuminate the test object. Specifically, the light source 122 may provide illumination to the object to be measured and form an imaging effect advantageous for image processing to improve stability of the image.

Fig. 6 is an exploded schematic view showing the protection device 10 according to the example of the present disclosure.

Referring to fig. 6, in some examples, the sliding rod 121 may have a cylindrical shape. Thereby, it is possible to have a smaller frictional resistance during the movement of the slide bar 121 to make the movement of the slide bar 121 smoother. In some examples, both ends of the sliding rod 121 may have screw holes. In this case, the slide rod 121 can be connected with other members of the floating portion 120 by fitting of the screw hole (to be described later in detail).

In some examples, the float 120 may include a plurality of sliding bars 121. For example, a slide bar 121a and a slide bar 121b as shown in fig. 6 may be included. In other examples, the float 120 may include 3, 4, 5, 6, etc. slide bars 121. When the floating part 120 includes a plurality of sliding bars 121, the plurality of sliding bars 121 may be symmetrically arranged around the outer circumference of the measurement lens 20, and the guide part 110 may also include a plurality of sliding rails matched with the plurality of sliding bars 121. In this case, when the floating portion 120 is displaced, a higher balance can be maintained to protect the measurement lens 20 from a collision as much as possible. In other examples, the plurality of sliding bars 121 may not be symmetrically arranged.

In some examples, the floating part 120 may further include a first fixing block 123 and a second fixing block 124. For convenience of description, both ends of the sliding rod 121 may be a first end and a 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 slide bar 121 may have screw holes. In some examples, the first end may have a first threaded hole and the second end may have a second threaded hole. The first fixing block 123 may be fixed to the first end by a first fixing member, and the second fixing block 124 may be fixed to the second end by a second fixing member. The first and second fixtures may be bolts or screws. In some examples, the first fixing block 123 may have a through hole to be matched with the first fixing member, and the second fixing block 124 may have a through hole to be matched with the second fixing member. In this case, the first fixing member can pass through the first fixing block 123 and fix the first fixing block 123 to the first end, and the second fixing member can pass through the second fixing block 124 and fix the second fixing block 124 to the second end.

In some examples, the first and second fixing blocks 123 and 124 may have the same shape and height. For example, may be substantially cylindrical, prismatic, or other column having an irregular shape.

In some examples, when the floating part 120 includes a plurality of sliding rods 121, a plurality of first fixing blocks 123 and a plurality of second fixing blocks 124 matched with the plurality of sliding rods 121 may be included at the same time. Referring to fig. 6, the float 120 may include two sliding bars 121. Specifically, a slide bar 121a and a slide bar 121b may be included. The floating part 120 at this time may further include first and second fixing blocks 123a1 and 124a2 provided at both ends of the sliding rod 121a, and first and second fixing blocks 123b1 and 124b2 provided at both ends of the sliding rod 121 b.

Referring to fig. 6, in some examples, the floating part 120 may further include a first floating plate 127 disposed at an outer circumference of the measurement lens 20, a second floating plate 128 disposed at the measurement lens 20, a first fixing block 123 for coupling the sliding bar 121 and the first floating plate 127, and a second fixing block 124 for coupling the second floating plate 128. In this case, the slide rod 121 can be mounted between the first and second floating plates 127 and 128 by the first and second fixed blocks 123 and 124.

In some examples, the first floating plate 127 can be connected to the sliding bars 121 through the first fixing block 123, and the second sliding plate can be connected to the sliding bars 121 through the second fixing block 124, thereby enabling the plurality of sliding bars 121 to have synchronicity.

In some examples, the float 120 may further include a first float plate 127. The first floating plate 127 may be used to connect a plurality of first fixing blocks 123. Thereby, the plurality of slide bars 121 can have synchronism in movement. The first floating plate 127 may be disposed on the outer circumference of the measurement lens 20. Specifically, the first floating plate 127 may have an inner surface that matches an outer surface of the measurement lens 20. This allows the first floating plate 127 to have a high degree of matching with the measurement lens 20. In some examples, the float 120 may further include a second float plate 128. The second floating plate 128 may be used to connect a plurality of second fixed blocks 124. The second floating plate 128 may be disposed at an outer circumference of the measurement lens 20. Specifically, the second floating plate 128 may have an inner surface that matches the outer surface of the measurement lens 20. This allows the second floating plate 128 to be highly matched to the measuring lens 20.

In some examples, the first fixing block 123 and the first floating plate 127 may be coupled together by welding or gluing. 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 welded, adhered, or snapped together. In other examples, the second fixed 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 located at an end of the measuring lens 20 close to the object. 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 to the sliding bar 121 through the second fixing block 124. In this case, the light source 122 can be fixed to the sliding rod 121, and the floating portion 120 can move in the predetermined direction D1 if the bottom of the light source 122 is subjected to an external force from the measuring platform 30 and/or the object.

In some examples, the light source 122 may be located between the measurement lens 20 and the object to be measured when measuring 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 regardless of whether the object is measured. When the bottom of the light source 122 (i.e., the portion near the measuring platform 30 and/or the object to be measured) is subjected to an external force, the light source 122 may be considered to be pressed against the measuring platform 30 and/or the object to be measured. At this time, the floating portion 120 moves a predetermined distance in the predetermined direction D1 to protect the light source 122 from being further pressed, 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 during the feedback stroke. In this case, even if the light source 122 is pressed by an external force, it is not damaged. The protection device 10 according to the present embodiment can protect the light source 122 from being pressed further, that is, can prevent the light source 122 from being pressed other than in the feedback stroke. This protects the light source 122 and the measurement lens 20.

As described above, the slide bar 121 may be provided with the light source 122. In other words, in some examples, the light source 122 may be disposed at the sliding bar 121. The light source 122 may be used to illuminate the target part. In some examples, the light source 122 can also be used to overcome ambient brightness interference to maintain a constant brightness around the test object. In this case, the measurement lens 20 can obtain image information with higher stability, which is beneficial to improving the imaging effect of the graphic processing, and further can reduce the complexity of the calculation system of the measuring instrument 1.

In some examples, the 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 the object to be measured can be kept to have stable brightness all around, so that the measuring lens 20 can obtain image information with higher stability, which is beneficial to improving the imaging effect of the graphic processing. In some examples, the bottom surface light source may be circular, rectangular, or any irregular pattern. In some examples, the bottom surface light source may have a through hole through which the measurement lens 20 passes. Thereby, the measuring lens 20 can pass through the bottom light source, and obtain stable image information of the object under test under the illumination of the light source 122.

As described above, the guide part 110 may serve to guide the floating part 120 to move in the preset direction D1. In some examples, the sliding bar 121 may be provided to the guide 110. In other examples, the slide bar 121 may be movably provided to the guide 110 with respect to the guide 110.

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

Specifically, in some examples, the guide 110 may include a linear bearing 111 and a bearing seat 112 that mates with the linear bearing 111. The linear bearing 111 may be a system that may provide linear motion. In some examples, the linear motion provided by the linear bearing 111 may have less frictional resistance and a more precise and smooth linear motion. This allows the floating portion 120 to move more stably on the guide portion 110. In some examples, the linear bearing 111 may be a cylindrical shaft.

In some examples, the linear bearing 111 may be provided to the bearing housing 112. Specifically, in some examples, the linear bearing 111 may have a first groove 114 surrounding the linear bearing 111 and used for mounting a first circlip 116, and a second groove 115 surrounding the linear bearing 111 and used for mounting a second circlip 117, and the linear bearing 111 may be disposed on the bearing housing 112 through the first circlip 116 and the second circlip 117. In this case, the linear bearing 111 can be fixed to the bearing holder 112 by providing the first circlip 116 in the first groove 114 and providing the second circlip 117 in the second groove 115, in other words, the linear bearing 111 does not move relative to the bearing holder 112 due to the above arrangement.

As described above, the guide 110 may include a plurality of slide rails matched with the plurality of slide bars 121. Referring to fig. 6, in some examples, the guide 110 may include two sliding rails. Specifically, a linear bearing 111a and a bearing housing 112a matching the linear bearing 111, and a linear bearing 111b and a bearing housing 112b matching the linear bearing 111 may be included. The related matching relationship and the connection relationship may be as described above, and are not described in detail herein.

Fig. 7 is a schematic diagram illustrating a second viewing angle at which the protection device 10 according to the example of the present disclosure is fitted to the measurement lens 20.

In some examples, the measurement instrument 1 may further include a fixing jig 40 for fixing the measurement lens 20. Referring to fig. 3, in particular, the fixing clamp 40 may include a first fixing seat 410, a first clamping block 420 cooperating with the first fixing seat 410, a second fixing seat 430, and a second clamping block 440 cooperating with the second fixing seat 430. The first fixing seat 410 and the first clamping block 420 may be disposed at an 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 an end of the measurement lens 20 near the measurement platform 30 for clamping the measurement lens 20. In other examples, the second fixing seat 430 and the second clamping block 440 may be disposed at any position on the outer circumference of the measurement lens 20. In some examples, the second fixing holder 430 and the second clamping block 440 may be fixed to a Z-axis moving part (described later).

In some examples, the guide 110 may further include a fixing plate 113. The fixing plate 113 may be connected to the bearing housing 112 and located at the outer circumference of the measurement lens 20. In some examples, the fixing plate 113 may be used to connect a plurality of bearing seats 112, for example, the bearing seats 112a and the bearing seats 112b may be connected (see fig. 6). In other examples, the bearing seats 112a and 112b and the fixing plate 113 may be integrally formed. In some examples, the fixing plate 113 may be fixed to a fixing base 410 for clamping the measurement lens 20. In this case, the guide portion 110 can be maintained in a relatively fixed state with respect to the measurement lens 20, and thus can provide a stable linear motion to the floating portion 120.

As described above, the second fixing base 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 the preset direction D1 and in a direction opposite to the preset direction D1. The measurement lens 20 may be fixed to the Z-axis moving part by a second fixing base 430 and a second clamping block 440. The movement of the Z-axis moving part can drive the measuring lens 20 to move, for example, close to or far from the object.

In some examples, the second fixed mount 430 and the second clamping block 440 may be fixed to any component that is stationary relative to the Z-axis moving part.

In some examples, the bearing seat 112 may be fixedly connected with the second fixed seat 430. In other words, the bearing housing 112 and the measurement lens 20 may not move relatively during the movement of the measurement lens 20.

In some examples, the second fixing seat 430 and the second clamping block 440 may be included in the guide 110. In this case, the second fixing base 430 can provide a stable base for the installation of the linear bearing 111 and the bearing housing 112, and thus, the bearing housing 112 and the measuring lens 20 do not move relatively.

In some examples, the linear bearing 111 may cooperate with the slide rod 121 such that the slide rod 121 is movable relative to the guide 110. In this case, the slide rod 121 is movable in the preset direction D1 with respect to the linear bearing 111, and the floating portion 120 is movable with respect to the guide portion 110.

Referring to fig. 5 and 6, in some examples, the float 120 may further include a first rubber pad 125 and a second rubber pad 126. The first rubber pad 125 and the second rubber pad 126 can be disposed on the periphery of the sliding rod 121. In some examples, the first and second rubber pads 125 and 126 may be used to reduce vibration of the floating portion 120 during movement, i.e., may play a role in shock absorption. In some examples, the first and second rubber pads 125 and 126 may also reduce noise generated by the floating portion 120 during movement, i.e., may reduce noise. When the plurality of sliding rods 121 are included, a plurality of first rubber pads 125 and a plurality of second rubber pads 126 matched with the plurality of sliding rods 121 may also be included, which is not described herein again.

In some examples, a first rubber pad 125 may be disposed at an outer circumference of the sliding rod 121 between the linear bearing 111 and the first fixing block 123, and a second rubber pad 126 may be disposed at an outer circumference of the sliding rod 121 between the linear bearing 111 and the second fixing block 124. In this case, when the slide rod 121 moves relative to the linear bearing 111, the vibration of the floating portion 120 due to the movement can be reduced as much as possible while reducing noise, so that the light source 122 and the measurement lens 20 can be further protected.

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. Wherein the photosensor 131 can be used to emit a transmission signal. The detector 132 may be used to block the emission signal of the photosensor 131. In addition, the photosensor 131 can also be used to receive the transmitted signal that is blocked by the detector 132.

In some examples, the photosensor 131 may be any device that can emit an optical signal, a radar signal, an electronic signal, or the like. For example, the photosensor 131 may be a photoelectric switch. In some examples, the transmission signal may be an optical signal, a radar signal, or an electronic signal, among other signals. In some examples, the detector 132 may be any device that can reflect (or block) any of the signals described above. The detector 132 may also be referred to as a light barrier.

In the protection device 10 according to the present embodiment, the photosensor 131 may form an electrical signal by blocking the emission signal by the detector 132, and may transmit the electrical signal to the control unit 140 so that the control unit 140 controls the measurement lens 20 to be away from the object. For example, in some examples, the detector 132 may block an invisible light path of the photosensor 131, so that the photosensor 131 emits different high or low frequency electrical signals to the control portion 140, and the control portion 140 receives the corresponding electrical signals and may control the measuring lens 20 to be away from the object to be measured, thereby protecting the measuring lens 20 and the measuring process.

In some examples, the photosensor 131 may be disposed at the guide 110. In some examples, the probe 132 may be disposed at the float 120. In this case, when the floating portion 120 moves a predetermined distance with respect to the guide portion 110, the detector 132 can block the emission signal of the photosensor 131. In other words, the detector 132 may be provided to the floating portion 120 and block the emission signal of the photosensor 131 when the floating portion 120 moves relative to the guide portion 110. This makes it possible to determine that the float 120 has moved relative to the guide 110 based on the emission signal being blocked by the detector 132. Specifically, as described above, in some examples, the detector 132 may block the invisible light path of the photosensor 131, so that the photosensor 131 emits different high or low frequency electrical signals to the control portion 140.

As shown in fig. 7, in some examples, the photosensor 131 may be disposed at the bearing housing 112. Thereby, the photosensor 131 can be kept in a relatively stationary state with respect to the bearing housing 112.

In some examples, the detector 132 may be disposed at the second fixed block 124. In this case, the probe 132 can be maintained in a relatively stationary state with the second fixing block 124, that is, in a relatively stationary state with the floating part 120, and the probe 132 can follow the movement when the floating part 120 moves a preset distance in the preset direction D1. In other examples, the probe 132 may be disposed on any one of the members of the float 120.

In this embodiment, the photosensor 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 be far away from the object to be measured based on the electric signal. Specifically, in some examples, the protection device 10 may further include a control portion 140. The control unit 140 may be used to control the measuring lens 20 to move away from or close to the object. For example, when measuring the object, the control unit 140 may control the measurement lens 20 to approach the object so that the object enters the measurement field of view of the measurement lens 20. After the measurement is finished, the measurement 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 measurement lens 20 to be away from the object to be measured when the light source 122 is impacted. In other words, when the floating portion 120 moves a predetermined distance in the predetermined direction D1, the control portion 140 can control the measuring lens 20 to move away from the object.

In some examples, the photosensor 131 can send an electrical signal to the control portion 140. The control unit 140 may control the measuring lens 20 to be away from the object based on the received electrical signal. Thereby, the protection device 10 can protect the measurement lens 20. In some examples, the measurement lens 20 is controlled to be away from the object while the light source 122 is controlled to be away from the object.

In some examples, the protective device 10 may further include an elastic member 150 for maintaining the floating portion 120 to have a tensile force in a direction opposite to the preset direction D1, and one end of the elastic member 150 may be disposed at the first floating plate 127 and the other end of the elastic member 150 may be disposed at the fixed plate 113. In some examples, the direction opposite to the preset direction D1 may be a vertically downward direction. In this case, the elastic member 150 can always provide a downward light tensile force to the floating portion 120 during the measurement of the object, and even if the light source 122 is collided by an abnormal factor, the floating portion 120 can be quickly returned to the original position by the tensile force of the elastic member 150, and further, the reliability of the measuring instrument 1 can be ensured.

In some examples, the initial position may be a position when the float 120 is not moving.

In some examples, if the guard 10 includes only one sliding bar 121, the guard 10 may not include the first floating plate 127, the second floating plate 128, and the stationary plate 113. In some examples, the protection device 10 may further include an elastic member 150 (some drawings are drawn for clarity) for maintaining the floating portion 120 to have a tensile force in a predetermined direction D1, and if the protection device 10 includes only one sliding rod 121, one end of the elastic member 150 may be disposed at the first fixing block 123, and the other end of the elastic member 150 may be disposed at the bearing block 112.

Fig. 8 is a flow chart illustrating a protection method according to an example of the present disclosure.

The embodiment also discloses a method for protecting the measuring lens 20. Referring to fig. 8, the method of protecting the measurement lens 20 may include: if the light source 122 receives an external force, the floating portion 120 moves in the predetermined direction D1 (step S200), the sensor portion 130 monitors the movement signal of the floating portion 120, and sends an electric signal to the control portion 140 in response to the sensor portion 130 monitoring the movement signal of the floating portion 120 (step S400), and the control portion 140 controls the measuring lens 20 to be away from the measuring platform 30 (step S600).

According to the present disclosure, when the measuring apparatus 1 measures the information of the object to be measured, when the measuring lens 20 approaches the object to be measured, if the light source 122 contacts the measuring lens 20 and receives an external force within the feedback stroke range, the floating portion 120 moves in a predetermined direction D1, when the detector 132 blocks the invisible light path of the photosensor 131, it indicates that the floating portion 120 has moved in the preset direction D1, the photoelectric sensor 131 can form an electrical signal based on the transmitted signal blocked by the detector 132 and send the electrical signal to the control portion 140, the control portion 140 can control the measuring lens 20 to be away from the object to be measured based on the received electrical signal, the protection device 10 can achieve the purpose of intelligently protecting the measuring lens 20, and therefore, the light source 122 is not further squeezed and damaged, and the measurement lens 20 can be protected from being damaged to maintain the measurement accuracy of the measuring instrument 1.

While the disclosure has been described in detail in connection with the drawings and examples, it is to be understood that the above description is not intended to limit the disclosure in any way. Those skilled in the art can make modifications and variations to the present disclosure as needed without departing from the true spirit and scope of the disclosure, which fall within the scope of the disclosure.

Claims (10)

1. A protection device for a measuring instrument, which is a protection device for protecting a measuring lens of the measuring instrument during measurement of an object to be measured, the protection device comprising: the device comprises a guide part, a floating part, a sensing part and a control part for controlling the movement of the measuring lens, wherein the guide part is arranged on the measuring lens and is used for guiding the floating part to move in a preset direction; when the object to be measured is measured, at least one part of the floating part is positioned between the measuring lens and the object to be measured, the floating part comprises a sliding rod and a light source which is arranged on the sliding rod and positioned at one end of the measuring lens close to the object to be measured, and the sliding rod is arranged on the guide part in a manner of moving relative to the guide part; the sensing part including set up in the photoelectric sensor of guide part with set up in the portion of floating be used for the wall during the portion of floating with guide part relative movement photoelectric sensor's transmitted signal's detector, photoelectric sensor is based on the detector cuts off transmitted signal and form the signal of telecommunication and will the signal of telecommunication send to the control part is so that the control part control measuring lens keeps away from the determinand.

2. The protection device of claim 1,

the floating part further comprises a first floating plate arranged on the periphery of the measuring lens, a second floating plate arranged on the measuring lens, a first fixed block used for connecting the sliding rod and the first floating plate, and a second fixed block used for connecting the sliding rod and the second floating plate.

3. The protection device of claim 2,

the detector is arranged on the second fixed block.

4. The protection device of claim 2,

the light source is connected with the sliding rod through the second fixing block.

5. The protection device of claim 2,

the guide part comprises a linear bearing, a bearing seat matched with the linear bearing and a fixing plate connected with the bearing seat and positioned at the periphery of the measuring lens, and the linear bearing is matched with the sliding rod so that the sliding rod can move relative to the guide part.

6. The protection device of claim 5,

the floating device further comprises an elastic member for keeping the floating part to have a tensile force in a direction opposite to the preset direction, one end of the elastic member is arranged on the first floating plate, and the other end of the elastic member is arranged on the fixed plate.

7. The protection device of claim 5,

the linear bearing is provided with a first groove surrounding the linear bearing and used for installing a first elastic check ring and a second groove surrounding the linear bearing and used for installing a second elastic check ring, and the linear bearing is arranged on the bearing seat through the first elastic check ring and the second elastic check ring.

8. A protection device according to claim 5,

the floating part further comprises a first rubber pad and a second rubber pad, the first rubber pad is arranged on the periphery of the sliding rod and located between the linear bearing and the first fixed block, and the second rubber pad is arranged on the periphery of the sliding rod and located between the linear bearing and the second fixed block.

9. The protection device of claim 5,

the photoelectric sensor is arranged on the bearing seat.

10. The protection device of claim 1,

the light source is an annular light source.

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