Anti-collision system for optical equipment and measurement platform

Abstract

The present disclosure provides an anti-collision system for an optical device and a measuring platform, the anti-collision system for the optical device comprising a guide sleeve, a dense bead sliding sleeve, a sliding shaft, a contact sensing assembly, a movable contact, a fixed ring, and an optical lens, the dense bead sliding sleeve being arranged inside the guide sleeve, the sliding shaft passing through the dense bead sliding sleeve and forming a rolling friction with the dense bead sliding sleeve, the sliding shaft being connected with the fixed ring, the optical lens being arranged on the fixed ring, the contact sensing assembly being fixedly arranged outside the guide sleeve, the movable contact being arranged between the sliding shaft and the fixed ring, the movable contact moving synchronously with the sliding shaft when the anti-collision system moves and contacts with a sample surface, the movable contact contacting with the contact sensing assembly to generate a contact signal, wherein, between the tail of the sliding shaft and the tail of the fixed ring, the position of the central axis of the anti-collision system is a hollow structure. Thus, the reliability can be improved, the cost can be reduced, and the application range can be expanded.

Description

[0001] This application is a divisional application of the patent application filed on May 11, 2020, with application number 2020103932465, entitled "A Contact-type Stretchable Guiding and Positioning Collision Protection System and Measurement Platform". Technical Field

[0002] This invention relates to measuring instruments, and more particularly to an anti-collision system and measuring platform for optical equipment. Background Technology

[0003] Collision avoidance systems are widely used in precision measurement, optics, and other fields. Currently, the main collision avoidance protection systems applied in precision optical measurement include the following solutions: 1. Pulsed laser ranging emits a laser signal to the target, which is reflected back upon contact with the target. The distance to be located is calculated by the round-trip time of the received light signal. 2. Continuous wave phase laser ranging uses a continuously modulated laser wave to illuminate the target. The distance to the target can be calculated from the phase change caused by the round trip of the measured light. To ensure measurement accuracy, a laser reflector is usually installed on the target. 3. Ultrasonic ranging utilizes the known speed of sound in the air to measure the time it takes for the sound wave to be reflected back from the target after being emitted, and calculates the actual distance from the emission point to the sample based on the time difference between emission and reception.

[0004] The shortcomings of the existing solutions described above are as follows: 1) In practice, it has been found that laser ranging suffers from large ranging errors and inaccurate positioning due to the diffuse reflection of light and the different reflectivity of different material samples, which can lead to accidental collisions and damage to the protected components.

[0005] 2) In practice, it has been found that laser ranging devices are difficult to manufacture and have high costs. Moreover, the optical system needs to be kept clean and has high environmental requirements.

[0006] 3) Ultrasonic ranging has low accuracy and high cost, and has a blind zone of tens of millimeters in the smallest detection area, making it impossible to protect optical devices with small working distances.

[0007] 4) Current non-contact ranging methods are difficult to meet the positioning measurement needs of some sample surfaces that are small, have low reflectivity, or are high and sharp.

[0008] Therefore, how to provide a collision avoidance system that is not easily damaged, has low cost, low environmental requirements, and has a wide range of applications is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0009] To address the problems in the prior art, the present invention provides a contact-type retractable guide positioning anti-collision protection system and measurement platform.

[0010] This invention provides a contact-type retractable guiding and positioning anti-collision protection system, including a guide sleeve, a beaded sliding sleeve, a sliding shaft, a spring, a baffle, a contact sensing component, a movable contact, a fixed ring, and an optical lens. The beaded sliding sleeve is installed on the inner side of the guide sleeve. The sliding shaft passes through the beaded sliding sleeve and is connected to the fixed ring. The sliding shaft and the beaded sliding sleeve experience rolling friction. The optical lens is installed on the fixed ring. The baffle is connected to the guide sleeve. The spring is sandwiched between the baffle and the sliding shaft and serves a reset function. The movable contact is sandwiched between the sliding shaft and the fixed ring. The contact sensing component is fixed on the guide sleeve. When the anti-collision protection system moves in the forward direction and contacts the sample surface, the movable contact and the sliding shaft move synchronously in the opposite direction until the movable contact contacts the contact sensing component, thereby triggering a contact signal.

[0011] As a further improvement of the present invention, the head of the sliding shaft passes through the beaded sleeve and is threadedly connected to the tail of the fixing ring. A conical positioning structure is provided between the tail of the sliding shaft and the tail of the guide sleeve. The baffle is fixed on the tail of the guide sleeve, and the spring is clamped between the baffle and the tail of the sliding shaft.

[0012] As a further improvement of the present invention, the optical lens is threadedly connected to the head of the fixed ring, and the movable contact is clamped between the head of the sliding shaft and the tail of the fixed ring.

[0013] As a further improvement of the present invention, the tail of the sliding shaft is provided with a conical positioning protrusion, and the tail of the guide sleeve is provided with a conical positioning chamfer that cooperates with the conical positioning protrusion.

[0014] As a further improvement of the present invention, the contact sensing component includes a trigger circuit board and a contact probe disposed on the trigger circuit board, wherein the movable contact is provided with a contact bump that cooperates with the contact probe.

[0015] As a further improvement of the present invention, the movable contact is provided with an anti-rotation protrusion, the guide sleeve is provided with an anti-rotation groove, and the anti-rotation protrusion is disposed within the anti-rotation groove.

[0016] The present invention also provides a measurement platform, including a contact-type retractable guide positioning anti-collision protection system as described in any one of the above-mentioned methods.

[0017] As a further improvement of the present invention, the measurement platform further includes a drive system, which includes a drive part, an execution part and a control part. The control part is connected to the drive part, the drive part is connected to the execution part, the execution part is connected to the guide bushing or baffle, and the control part is connected to the contact sensing component.

[0018] The beneficial effects of the present invention are as follows: the above solution adopts contact-type anti-collision protection, which does not require a reflection receiving device, has no requirement for the distance between the protected device and the sample, is widely applicable, has sensitive triggering, provides power-off protection upon contact, has no environmental requirements, and is low in cost. As it is a mechanical structure, it is very safe and reliable and not easily damaged. Attached Figure Description

[0019] Figure 1 This is an exploded view of a contact-type retractable guide positioning anti-collision protection system according to the present invention.

[0020] Figure 2 This is a cross-sectional schematic diagram of a contact-type retractable guide positioning anti-collision protection system according to the present invention.

[0021] Figure 3 This is an assembly diagram of a contact-type retractable guide positioning anti-collision protection system according to the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 3 As shown, to address the problem of damage to objective lenses or other critical probe components in optical equipment probes due to impacts, this invention provides a contact-type retractable guide and positioning anti-collision protection system. The system includes a guide sleeve 1, a beaded sliding sleeve 2, a sliding shaft 3, a spring 4, a baffle 5, a contact-type sensing component, a movable contact 8, a fixing ring 10, and an optical lens 11. The beaded sliding sleeve 2 is mounted on the inner side of the guide sleeve 1. The sliding shaft 3 passes through the beaded sliding sleeve 2 and is connected to the fixing ring 10. The sliding shaft 3 and the beaded sliding sleeve 2 experience rolling friction. The optical lens 11 is mounted on the fixed ring 10. The baffle 5 is connected to the guide sleeve 1. The spring 4 is clamped between the baffle 5 and the sliding shaft 3 and plays a reset role. The movable contact 8 is clamped between the sliding shaft 3 and the fixed ring 10. The contact sensing component is fixed on the guide sleeve 1. When the anti-collision protection system moves in the forward direction and contacts the sample surface, the movable contact 8 and the sliding shaft 3 move in opposite directions synchronously until the movable contact 8 contacts the contact sensing component, thereby triggering a contact signal.

[0024] like Figures 1 to 3As shown, the head of the sliding shaft 3 passes through the beaded sleeve 2 and is threadedly connected to the tail of the fixing ring 10. A conical positioning structure is provided between the tail of the sliding shaft 3 and the tail of the guide sleeve 1. The baffle 5 is fixed on the tail of the guide sleeve 1, and the spring 4 is clamped between the baffle 5 and the tail of the sliding shaft 3.

[0025] like Figures 1 to 3 As shown, the optical lens 11 is threadedly connected to the head of the fixed ring 10, and the movable contact 8 is clamped between the head of the sliding shaft 3 and the tail of the fixed ring 10.

[0026] like Figures 1 to 3 As shown, the tail of the sliding shaft 3 is provided with a conical positioning protrusion 31, and the tail of the guide sleeve 1 is provided with a conical positioning chamfer 12 that cooperates with the conical positioning protrusion 31.

[0027] like Figures 1 to 3 As shown, the contact sensing component includes a trigger circuit board 7 and a contact probe 71 disposed on the trigger circuit board 7, and the movable contact 8 is provided with a contact bump 82 that cooperates with the contact probe 71.

[0028] like Figures 1 to 3 As shown, the movable contact 8 is provided with an anti-rotation protrusion 81, and the guide bushing 1 is provided with an anti-rotation groove 11, with the anti-rotation protrusion 81 disposed within the anti-rotation groove 11.

[0029] The present invention provides a contact-type retractable guiding and positioning anti-collision protection system, the assembly process of which is as follows: First, install the ball bearing sleeve 2 onto the guide sleeve 1; The second step is to pass the sliding shaft 3 through the beaded sleeve 2, so that the sliding shaft 3 passes through the guide sleeve 1; In the third step, the movable contact 8 is fitted onto the sliding shaft 3, and the screws of the retaining ring 10 and the sliding shaft 3 are turned upwards to clamp the movable contact 8, and to make the anti-rotation protrusion 81 of the movable contact 8 cooperate with the anti-rotation groove 11 of the guide sleeve 1 (see...). Figure 1 ); The fourth step is to fix the trigger circuit board 7 to the guide sleeve 1 using the trigger circuit board fixing screw 9 (see...). Figure 3 This ensures that the distance between the contact probe 71 on the trigger circuit board 7 and the active contact 8 is approximately 0.5 mm. Step 5: Install spring 4 onto sliding shaft 3 (see...) Figure 2 ), then cover with baffle 5 and tighten with fixing screw 6 (see) Figure 3 ); Finally, screw the optical lens 11 onto the retaining ring 10 (see...). Figure 2 ).

[0030] The present invention also provides a measurement platform, including a contact-type retractable guide positioning anti-collision protection system as described in any one of the above-mentioned methods.

[0031] The measurement platform also includes a drive system, which includes a drive part, an execution part, and a control part. The control part is connected to the drive part, the drive part is connected to the execution part, the execution part is connected to the guide sleeve or baffle, and the control part is connected to the contact sensing component.

[0032] The present invention provides a contact-type retractable guiding and positioning anti-collision protection system, the working principle of which is as follows: Since the sliding shaft 3, movable contact 8, fixed ring 10, and optical lens 11 are integrated, when the optical lens 11 moves downward, it contacts the sample surface. Due to the reaction force, it is slightly forced upward, which drives the movable contact 8 to move upward and contact the trigger circuit board 7. The trigger circuit board 7 sends a signal to the drive system, causing the optical lens 11 to stop moving downward, thus achieving a protective function. Then, through external driving force, the optical lens 11 is moved away from the sample. Through the reverse extension of the spring 4, the guidance of the beaded sliding sleeve 2, and the pushing of the sliding shaft 3, the movable contact 8 is disengaged from the trigger circuit board 7. Since the guide sleeve 1 and the sliding shaft 3 are engaged by a conical surface, the optical lens 11 is reset to its original position, thereby achieving a positioning effect.

[0033] The present invention provides a contact-type retractable guide positioning anti-collision protection system, which is characterized by ignoring the shape and size of the sample, adjusting the collision force by the spring force, allowing important components to be retracted and buffered after contact, and triggering a signal to cut off power protection immediately upon collision. It is also easy to design and integrate with the protected component; the structure is simple, making the equipment integrated, miniaturized, highly reliable, and significantly reducing costs.

[0034] The present invention provides a contact-type retractable guide positioning anti-collision protection system and measurement platform, which has the following improvements: 1) A ball-guided telescopic motion mechanism is adopted. A ball-guided sleeve 2 is installed between the guide sleeve 1 and the sliding shaft 3, guiding the movement and changing it from traditional dry friction to rolling friction. When the optical lens 11 moves up and down, it drives the sliding shaft 3 to move, and the compression (or tension) force of the spring 4 returns the sliding shaft 3 to its original position (see...). Figure 2 This addresses the problem of wear and increased friction caused by dry friction, leading to anti-collision failure. 2) Conical surface positioning method (see...) Figure 2 When the guide sleeve 1 and the sliding shaft 3 move relative to each other, they are guided and positioned by their conical surfaces when they return to their original positions, thus solving the positioning problem after the equipment collides. 3) Anti-rotation mechanical structure (see...) Figure 1When the threads of the retaining ring 10 and the sliding shaft 3 are screwed upward, the movable contact 8 is clamped, and the boss of the movable contact 8 mates with the recess of the guide sleeve 1, thus connecting the optical lens 11, the retaining ring 10, and the sliding shaft 3 into a single structural component (see...). Figure 2 It will not rotate, thus solving the problem of the positioning shaft rotation; 4) Mechanical-electronic combined triggering power-off method (see...) Figure 2 When the active contact 8 moves upward and contacts the trigger circuit board 7, the trigger circuit board 7 sends a signal to the drive system, causing the optical lens 11 to stop moving downward or the entire system (equipment) to lose power, thus providing emergency stop protection.

[0035] The present invention provides a contact-type retractable guide positioning anti-collision protection system and measurement platform, which has the following advantages: 1) It adopts a contact-type anti-collision protection method, which does not require a reflection receiving device. There are no requirements on the distance between the protected device and the sample, making it widely applicable.

[0036] 2) It is sensitive to triggering, provides power-off protection upon contact, has no environmental requirements, and is low in cost. Due to its mechanical structure, it is very safe and reliable.

[0037] 3) It can sensitively provide anti-collision protection regardless of the sample's size, height, or reflectivity.

[0038] 4) Based on this contact-type anti-collision design principle, a good protective structure can be designed to make the equipment aesthetically pleasing and improve its economic value.

[0039] The contact-type retractable guiding and positioning anti-collision protection system provided by this invention can be used in some industrial testing instruments and high-precision platforms, such as image microscopy measuring probes, high-magnification objectives, interference objectives, nano probes, nano displacement stages, etc.

[0040] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A collision avoidance system for optical equipment, characterized in that, The system includes a guide sleeve, a beaded sliding sleeve, a sliding shaft, a contact sensing component, a movable contact, a fixed ring, and an optical lens. The beaded sliding sleeve is disposed inside the guide sleeve. The sliding shaft passes through the beaded sliding sleeve and forms rolling friction with it. The sliding shaft is connected to the fixed ring. The optical lens is disposed on the fixed ring. The contact sensing component is fixedly disposed on the outside of the guide sleeve. The movable contact is disposed between the sliding shaft and the fixed ring. When the anti-collision system moves and contacts the sample surface, the movable contact moves synchronously with the sliding shaft and contacts the contact sensing component to generate a contact signal. The central axis of the anti-collision system, located between the tail of the sliding shaft and the tail of the fixed ring, is a hollow structure.

2. The anti-collision system for optical equipment according to claim 1, characterized in that, The head of the sliding shaft passes through the beaded sleeve and is threaded to the tail of the fixing ring. A tapered positioning structure is provided between the tail of the sliding shaft and the tail of the guide sleeve.

3. The anti-collision system for optical equipment according to claim 1, characterized in that, The movable contact is provided with an anti-rotation protrusion, and the guide sleeve is provided with an anti-rotation groove that matches the anti-rotation protrusion. When the movable contact is clamped, the anti-rotation protrusion and the anti-rotation groove cooperate to make the optical lens, the fixing ring and the sliding shaft integrated and prevent them from rotating.

4. The anti-collision system for optical equipment according to claim 1, characterized in that, It also includes a spring and a baffle, the baffle being connected to the guide bushing, and the spring being sandwiched between the baffle and the sliding shaft, the spring serving a reset function.

5. The anti-collision system for optical equipment according to claim 1, characterized in that, The movable contact is clamped between the head of the sliding shaft and the tail of the fixed ring.

6. The anti-collision system for optical equipment according to claim 1, characterized in that, The movable contact is sleeved on the sliding shaft.

7. The anti-collision system for optical equipment according to claim 1, characterized in that, The contact sensing component includes a trigger circuit board and a contact probe disposed on the trigger circuit board, wherein the movable contact is provided with a contact bump that cooperates with the contact probe.

8. The anti-collision system for optical equipment according to claim 1, characterized in that, The movable contact and the sliding shaft move synchronously in opposite directions until the movable contact comes into contact with the contact sensing component, thereby triggering the contact signal.

9. A measurement platform, characterized in that, Includes an anti-collision system for optical equipment as described in any one of claims 1 to 8.

10. The measurement platform according to claim 9, characterized in that, It also includes a drive system, which comprises a drive section, an execution section, and a control section. The control section is connected to the drive section, the drive section is connected to the execution section, the execution section is connected to the guide sleeve or baffle of the collision avoidance system, and the control section is connected to the contact sensing component of the collision avoidance system.

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