Self-centering optical path receiving device
By using the connecting post and connecting ring of the self-centering optical path receiver to cooperate and by utilizing the adjustable gap design to automatically compensate for processing errors, the problem of optical path misalignment in a vibrating environment is solved, and fast and accurate optical path centering and high-stability optical signal reception are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING LIANHUA YONGXING TECH DEV CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-26
AI Technical Summary
Existing optical path receiving devices are prone to optical path misalignment due to mechanical displacement in vibrating environments, requiring frequent manual correction, which is time-consuming and inaccurate.
A self-centering optical path receiving device is adopted. Through the cooperation of the connecting column and the connecting ring, the automatic centering of the photoelectric lens assembly and the photoelectric fixing assembly is achieved by adjusting the gap design. The connecting ring generates elastic deformation when tightened, which automatically compensates for processing errors and realizes automatic correction of the coaxiality of the optical components.
It achieves a fast and automatic centering process, improves the accuracy of optical path reception, maintains high stability in vibration environments, with an optical axis offset of less than 0.02 mm and a centering time of less than 0.05 seconds.
Smart Images
Figure CN224286705U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical precision instrument technology, and in particular to a self-centering optical path receiving device. Background Technology
[0002] In many optical applications such as optical inspection and spectral analysis, optical path receiving devices need to accurately receive and process light signals from target objects.
[0003] In existing optical path receiving devices, the photoelectric mounting base and the photoelectric lens block are mostly connected by threads. The centering and correction between the two are achieved by manually adjusting the set screws around them. In a vibrating environment, the optical path is prone to misalignment due to mechanical displacement, requiring frequent manual correction. The operation is limited by manual labor, time-consuming, and has poor accuracy. Utility Model Content
[0004] The purpose of this invention is to provide a self-centering optical path receiving device to solve the problems existing in the prior art, enabling fast and automatic centering and improving accuracy.
[0005] To achieve the above objectives, this utility model provides the following solution:
[0006] This utility model provides a self-centering optical path receiving device, including a colorimeter, a light-gathering module, and a receiving module; the colorimeter has a first mounting port and a second mounting port, the first mounting port and the second mounting port being opposite to each other; the light-gathering module is fixedly mounted at the first mounting port; the receiving module includes a photoelectric lens assembly, a photoelectric fixing assembly, and a clamping ring; the photoelectric lens assembly is fixedly mounted at the second mounting port, the photoelectric fixing assembly has a connecting ring, and the circumferential sidewall of the connecting ring is provided with a plurality of through-hole adjustment gaps, the adjustment gaps including a first axial gap, a circumferential gap, and a second axial gap connected in sequence, the first axial gap... The circumferential gap and the second axial gap are parallel to the axis of the connecting ring. The length of the circumferential gap extends perpendicular to the axis of the connecting ring, and the end of the second axial gap away from the circumferential gap extends to the end of the connecting ring near the photoelectric lens assembly. The clamp is sleeved on the outside of the connecting ring and can tighten the connecting ring. The photoelectric lens assembly has a connecting post, and the end of the connecting post away from the colorimetric cell passes through the connecting ring. In the axial direction of the connecting ring, the length of the connecting post extending into the connecting ring is not greater than the distance from the circumferential gap to the end of the connecting ring near the colorimetric cell.
[0007] Preferably, the photoelectric fixing assembly includes a photoelectric fixing base, a shock absorber, and a light signal sensor; the photoelectric fixing base has a support groove, and one end of the photoelectric fixing base is the connecting ring; the inner cavity of the support groove communicates with the inside of the connecting ring through a connecting hole, the inner diameter of the connecting hole being smaller than the inner diameter of the support groove; the shock absorber includes an outer ring plate, an inner ring plate, and multiple connecting arc-shaped ribs; the inner ring plate is disposed inside the outer ring plate, and each of the connecting arc-shaped ribs is located between the inner side of the outer ring plate and the outer side of the inner ring plate; each of the connecting arc-shaped ribs is circumferentially distributed around the axis of the inner ring plate, one end of the connecting arc-shaped rib is fixedly connected to the inner sidewall of the outer ring plate, and the other end of the connecting arc-shaped rib is fixedly connected to the outer sidewall of the inner ring plate; the light signal sensor is fixedly disposed inside the inner ring plate, and the outer ring plate is fixedly disposed inside the support groove.
[0008] Preferably, a plurality of first protruding ribs are fixedly provided on the inner sidewall of the outer ring plate, and the first protruding ribs correspond one-to-one with the connecting arc-shaped ribs, and the connection between the connecting arc-shaped ribs and the inner ring plate is opposite to the position of the first protruding ribs.
[0009] Preferably, a plurality of second protruding ribs are fixedly provided on the outer side wall of the inner ring plate. The second protruding ribs correspond one-to-one with the connecting arc-shaped ribs, and the second protruding ribs are opposite to the first position on the connecting arc-shaped ribs. The length between the end of the connecting arc-shaped ribs near the first position and the first position is 1 / 3 of the total length of the connecting arc-shaped ribs.
[0010] Preferably, the photoelectric fixing assembly further includes a filter, which is fixedly disposed in the mounting groove between the shock absorber and the connecting hole.
[0011] Preferably, the photoelectric fixing assembly further includes a circuit board, which is fixedly disposed at the end of the photoelectric fixing base away from the photoelectric lens assembly; the circuit board is fixedly connected to the optical signal sensor through multiple pins; a limiting ring plate is fixed to one end of the optical signal sensor, and the outer diameter of the limiting ring plate is larger than the inner diameter of the inner ring plate.
[0012] Preferably, the photoelectric lens assembly has a mounting plate with multiple elongated holes, and multiple connecting screws are fixed on the outer wall of the colorimetric cell. The elongated holes correspond one-to-one with the connecting screws, and a fixing nut is threaded onto the portion of the connecting screw that extends out of the elongated hole.
[0013] Preferably, the light-gathering module includes a lens mounting base, a lens annular pressure plate, and a light-gathering lens; the lens mounting base is fixedly disposed on the colorimetric cell at the first mounting port; the lens mounting base is provided with a through light-gathering channel, the light-gathering channel corresponding to the position of the first mounting port; the lens annular pressure plate is used to fix the end of the lens mounting base away from the colorimetric cell; the end of the lens annular pressure plate near the lens mounting base is provided with a first lens mounting groove; the light-gathering lens is fixedly disposed in the first lens mounting groove.
[0014] Preferably, the circuit board is provided with at least two arc-shaped grooves, and the end of the photoelectric mounting base away from the photoelectric lens assembly is provided with at least two connection mounting holes. A connector passes through each arc-shaped groove, and the connector is fixedly connected to one of the connection mounting holes.
[0015] Preferably, the photoelectric lens assembly includes a photoelectric lens block, a photoelectric lens plate, and a receiving lens; the photoelectric lens block has a through receiving channel; a second lens mounting slot is provided at one end of the photoelectric lens block near the colorimetric cell; a connecting post is formed at the other end of the photoelectric lens block away from the colorimetric cell; the photoelectric lens plate has a through hole and is provided with each of the elongated holes; the receiving lens is fixedly disposed in the second lens mounting slot.
[0016] The present invention achieves the following technical advantages over the prior art:
[0017] The self-centering optical path receiving device provided by this utility model connects the photoelectric lens assembly and the photoelectric fixing assembly through the cooperation of the connecting post and the connecting ring. The design of the adjustment gap on the connecting ring is the key to achieving self-centering. When the connecting ring is tightened, the connecting ring will undergo elastic deformation due to the existence of the adjustment gap. Specifically, the first axial gap and the second axial gap allow the connecting ring to have a certain deformation space in the circumferential direction, while the circumferential gap allows the connecting ring to produce a small deformation in the axial direction. This design allows the inner wall of the connecting ring to uniformly wrap the connecting post, automatically compensate for processing / assembly errors, and achieve automatic correction of the coaxiality of the optical components. The length of the connecting post extending into the connecting ring is not greater than the distance from the circumferential gap to the end of the connecting ring near the colorimetric cell. This allows the connecting post to have sufficient displacement space within the connecting ring, while not limiting the deformation ability of the connecting ring due to excessive extension, thereby improving the accuracy of centering. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 A schematic diagram of the overall structure of the self-centering optical path receiving device provided by this utility model;
[0020] Figure 2 A cross-sectional structural schematic diagram of the self-centering optical path receiving device provided by this utility model;
[0021] Figure 3 A cross-sectional structural diagram of the receiving module in the self-centering optical path receiving device provided by this utility model;
[0022] Figure 4 This is an overall view of the photoelectric fixing component and the clamping device in the self-centering optical path receiving device provided by this utility model.
[0023] Figure 5 for Figure 4 Exploded view of the structure;
[0024] Figure 6 A schematic diagram of the shock absorber in the self-centering optical path receiving device provided by this utility model;
[0025] Figure 7 A schematic diagram of the photoelectric lens assembly in the self-centering optical path receiving device provided by this utility model;
[0026] Figure 8 for Figure 7 Exploded view of the structure;
[0027] Figure 9 This is a schematic diagram of the overall structure of the light-gathering module in the self-centering optical path receiving device provided by this utility model.
[0028] Figure 10 for Figure 9 Cross-sectional view of the structure.
[0029] In the picture:
[0030] 10-Colorimetric cell; 11-Connecting screw;
[0031] 20 - Light-gathering module; 21 - Lens mounting base; 22 - Lens ring pressure plate; 23 - Light-gathering lens;
[0032] 30-Photoelectric fixing assembly; 31-Photoelectric fixing base; 311-Connecting mounting hole; 312-Adjusting gap; 3121-First axial gap; 3122-Circumferential gap; 3123-Second axial gap; 32-Shock absorber; 321-Outer ring plate; 322-Connecting arc-shaped rib plate; 323-Inner ring plate; 324-First protruding ridge; 325-Second protruding ridge; 33-Optical signal sensor; 331-Limiting ring plate; 34-Filter; 341-Filter sheet; 342-Photoelectric sleeve;
[0033] 40-Hoop;
[0034] 50 - Photoelectric lens assembly; 51 - Photoelectric lens clamping block; 52 - Receiving lens; 53 - Photoelectric lens plate; 531 - Elongated hole; 54 - Pin;
[0035] 60 - Circuit board; 61 - Arc groove. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] The purpose of this invention is to provide a self-centering optical path receiving device to solve the problems existing in the prior art, which can quickly and automatically center and improve accuracy.
[0038] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0039] Example 1
[0040] This embodiment provides a self-centering optical path receiving device, which is particularly suitable for scenarios with high requirements for optical path stability, such as laser communication, fiber optic sensing, and photometer instruments. Figures 1-10As shown, the system includes a colorimeter cell 10, a light-gathering module 20, and a receiving module. The colorimeter cell 10 has a first mounting port and a second mounting port, which are positioned opposite each other. The light-gathering module 20 is fixedly mounted at the first mounting port. The receiving module includes a photoelectric lens assembly 50, a photoelectric fixing assembly 30, and a clamping ring 40. The photoelectric lens assembly 50 is fixedly mounted at the second mounting port. The photoelectric fixing assembly 30 has a connecting ring, and a plurality of through-hole adjustment gaps 312 are provided on the circumferential sidewall of the connecting ring. The adjustment gaps 312 include a first axial gap 3121, a circumferential gap 3122, and a second axial gap 3123 connected in sequence. The first axial gap 3121 and the second axial gap 3123 are parallel to the axis of the connecting ring, and the circumferential gap 3122 is parallel to the axis of the connecting ring. The length of the gap 3122 extends perpendicularly to the axis of the connecting ring, and the end of the second axial gap 3123 away from the circumferential gap 3122 extends to the end of the connecting ring near the photoelectric lens assembly 50; the clamp 40 is fitted on the outside of the connecting ring, and the clamp 40 can tighten the connecting ring; the photoelectric lens assembly 50 has a connecting post, the end of the connecting post away from the colorimeter cell 10 is inserted into the connecting ring (in its natural state, the width of the annular gap formed between the outer diameter of the connecting post and the connecting ring is 0.1mm to 0.5mm, the connecting ring is made of metal and is fixed to the connecting post by radial preload); in the axial direction of the connecting ring, the length of the connecting post extending into the connecting ring is not greater than the distance from the circumferential gap 3122 to the end of the connecting ring near the colorimeter cell 10.
[0041] The connection between the photoelectric lens assembly 50 and the photoelectric fixing assembly 30 is achieved through the cooperation of the connecting post and the connecting ring. The design of the adjustment gap 312 on the connecting ring is the key to achieving self-centering. When the clamping hoist 40 tightens the connecting ring, the connecting ring will undergo elastic deformation due to the existence of the adjustment gap 312. Specifically, the first axial gap 3121 and the second axial gap 3123 allow the connecting ring to have a certain deformation space in the circumferential direction, while the circumferential gap 3122 allows the connecting ring to produce a small deformation in the axial direction. This design allows the inner wall of the connecting ring to uniformly wrap the connecting post, automatically compensate for processing / assembly errors, and achieve automatic correction of the coaxiality of the optical components. The length of the connecting post extending into the connecting ring is not greater than the distance from the circumferential gap 3122 to the end of the connecting ring near the colorimeter cell 10. This allows the connecting post to have sufficient displacement space in the connecting ring, while not limiting the deformation ability of the connecting ring due to excessive extension, thereby improving the centering accuracy.
[0042] Specifically, it can achieve rapid self-centering and high-stability optical signal reception under low assembly precision requirements; and when vibrating, the adjustment gap 312 on the connecting ring can adapt to the micro-movement of the connecting column, and with the cooperation of the connecting ring and the clamp 40, it can automatically reset to the center position.
[0043] The following are the settings instructions for the light-incoming module 20:
[0044] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 , Figure 9 and Figure 10 As shown, the light-gathering module 20 includes a lens mounting base 21, a lens annular pressure plate 22, and a light-gathering lens 23. The lens mounting base 21 is fixedly mounted on the colorimeter cell 10 at the first mounting port. A through light-gathering channel is provided on the lens mounting base 21, and the light-gathering channel corresponds to the position of the first mounting port. The lens annular pressure plate 22 is used to fix the lens mounting base 21 at the end away from the colorimeter cell 10. A first lens mounting groove is provided at the end of the lens annular pressure plate 22 near the lens mounting base 21. The light-gathering lens 23 is fixedly mounted in the first lens mounting groove.
[0045] Specifically, the lens annular pressure plate 22 has a through hole, and the end of the lens annular pressure plate 22 near the lens fixing seat 21 is provided with a first lens mounting groove. The first lens mounting groove, the through hole, the light inlet channel and the first mounting port are all coaxially arranged.
[0046] Specifically, the light-gathering lens 23 is an aspherical lens with an anti-reflection coating on its surface, which focuses the incident light and suppresses stray light reflection.
[0047] Specifically, a lens ring pressure plate 22 is arranged around the light-gathering lens 23 to block non-parallel incident light.
[0048] The following are the settings instructions for the photoelectric lens assembly 50 in the receiving module:
[0049] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 1 to 8 As shown, the photoelectric lens assembly 50 has a mounting plate with multiple elongated holes 531 (the extension direction of the elongated holes 531 is parallel to the vertical direction). Multiple connecting screws 11 are fixed on the outer wall of the colorimetric cell 10. The elongated holes 531 correspond one-to-one with the connecting screws 11. The part of the connecting screw 11 that passes through the elongated holes 531 is threaded with a fixing nut.
[0050] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the photoelectric lens assembly 50 includes a photoelectric lens pressing block 51, a photoelectric lens plate 53, and a receiving lens 52; the photoelectric lens pressing block 51 has a through receiving channel; a second lens mounting slot is provided at one end of the photoelectric lens pressing block 51 near the colorimeter cell 10; a connecting post is formed at the other end of the photoelectric lens pressing block 51 away from the colorimeter cell 10; the photoelectric lens plate 53 has a through hole, and each of the photoelectric lens plate 53 is provided with an elongated hole 531; the receiving lens 52 is fixedly mounted in the second lens mounting slot.
[0051] Specifically, a blocking plate is provided at one end of the photoelectric lens pressing block 51 near the photoelectric fixing component 30, and a through hole communicating with the receiving channel is opened at the center of gravity of the blocking plate.
[0052] The following are the settings for the photoelectric fixing component 30 in the receiving module:
[0053] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 1 to 8 As shown, the photoelectric fixing assembly 30 includes a photoelectric fixing base 31, a shock absorber 32, and a light signal sensor 33 (such as a photodiode, a pyroelectric infrared sensor, etc.). The photoelectric fixing base 31 has a mounting groove, and one end of the photoelectric fixing base 31 is a connecting ring. The inner cavity of the mounting groove is connected to the inside of the connecting ring through a connecting hole, and the inner diameter of the connecting hole is smaller than the inner diameter of the mounting groove. The shock absorber 32 includes an outer ring plate 321, an inner ring plate 323, and multiple connecting arc-shaped ribs 322. The inner ring plate 323 is disposed inside the outer ring plate 321, and each connecting arc-shaped rib 322 is located inside the outer ring plate 321. Between the inner ring plate 323 and the outer side; each connecting arc-shaped rib 322 is circumferentially distributed around the axis of the inner ring plate 323, one end of the connecting arc-shaped rib 322 is fixedly connected to the inner sidewall of the outer ring plate 321, and the other end of the connecting arc-shaped rib 322 is fixedly connected to the outer sidewall of the inner ring plate 323; the optical signal sensor 33 is fixedly installed inside the inner ring plate 323 (the outer sidewall of the optical signal sensor 33 and the inner hole of the inner ring plate 323 are in transition fit), and the outer ring plate 321 is fixedly installed in the support groove (the outer sidewall of the outer ring plate 321 and the inner sidewall of the support groove are in transition fit).
[0054] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 2 , Figure 3 and Figure 5 As shown, the photoelectric fixing assembly 30 also includes a filter 34, which is fixedly disposed in the mounting groove between the shock absorber 32 and the connecting hole.
[0055] Specifically, the filter 34 includes a filter 341 and a photoelectric sleeve 342. The photoelectric sleeve 342 has a small hole at one end near the shock absorber 32 and a large hole at the other end near the photoelectric lens assembly 50. The inner diameter of the small hole is smaller than the inner diameter of the large hole, and the small hole and the large hole are connected. The filter 341 and the large hole are interference fit.
[0056] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 1-5As shown, the photoelectric fixing assembly 30 also includes a circuit board 60, which is fixedly disposed at the end of the photoelectric fixing base 31 away from the photoelectric lens assembly 50; the circuit board 60 is fixedly connected to the optical signal sensor 33 through multiple pins 54; a limiting ring plate 331 is fixedly fixed at one end of the optical signal sensor 33, and the outer diameter of the limiting ring plate 331 is larger than the inner diameter of the inner ring plate 323.
[0057] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 2-5 As shown, the circuit board 60 is provided with at least two arc-shaped grooves 61, and the end of the photoelectric mounting base 31 away from the photoelectric lens assembly 50 is provided with at least two connection mounting holes 311. A connector passes through each arc-shaped groove 61 and is fixedly connected to a connection mounting hole 311.
[0058] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 6 As shown, a plurality of first protruding ribs 324 are fixedly provided on the inner sidewall of the outer ring plate 321. The first protruding ribs 324 correspond one-to-one with the connecting arc-shaped ribs 322, and the connection between the connecting arc-shaped ribs 322 and the inner ring plate 323 is opposite to the position of the first protruding ribs 324.
[0059] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 6 As shown, a plurality of second protruding ribs 325 are fixedly provided on the outer side wall of the inner ring plate 323. The second protruding ribs 325 correspond one-to-one with the connecting arc-shaped ribs 322, and the second protruding ribs 325 are opposite to the first position on the connecting arc-shaped ribs 322. The length between the end of the connecting arc-shaped ribs 322 near the first position and the first position is 1 / 3 of the total length of the connecting arc-shaped ribs 322.
[0060] Specifically, the first protruding rib 324 and the second protruding rib 325 can limit the amount of deformation and prevent excessive deformation.
[0061] Specifically, the shock absorber 32 is made of polytetrafluoroethylene (PTFE) material, which utilizes the elasticity of the material to absorb high-frequency vibration energy.
[0062] Specifically, the shock absorber 32 has both shock absorption and positioning functions for the optical signal sensor 33, reducing assembly layers and tolerance sensitivity.
[0063] Specifically,
[0064] The following are the settings instructions for the clamping device 40 in the receiving module:
[0065] Specifically, the two ends of the stirrup 40 are provided with connecting blocks, the connecting blocks are provided with connecting through holes, and connecting fasteners are provided in the connecting through holes. When the two connecting blocks are close to each other, the stirrup is formed.
[0066] Regarding other relevant explanations:
[0067] Specifically, the self-centering optical path receiving device in this embodiment features a stray light suppression design throughout the entire optical path from light intake to signal reception, such as a lens ring pressure plate 22 circumferentially arranged on the light intake lens 23 to block non-parallel incident light; and the setting of the filter 34, etc.
[0068] Specifically, when external vibration causes the photoelectric fixing component 30 to shift, each adjustment gap 312 enables it to self-center with the photoelectric lens component 50; while the shock absorber 32 can absorb residual vibration through deformation, maintaining the alignment of the photosensitive surface of the optical signal sensor 33 with the optical path.
[0069] Specifically, the assembly error between the photoelectric fixing component 30 and the photoelectric lens component 50 is allowed to be ±0.2mm, and the cooperation between the connecting ring and the connecting post can achieve automatic compensation, thereby reducing processing costs.
[0070] Specifically, the self-centering optical path receiving device of this embodiment can achieve an optical axis offset (i.e., the offset between the axis of the optical signal sensor 33 and the axis of the optical path) of ≤0.02mm and a centering time of <0.05 seconds under 5g acceleration vibration.
[0071] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A self-centring optical path receiving device, characterized by: Includes a colorimetric cell, an input light module, and a receiving module; The colorimetric cell has a first mounting port and a second mounting port, with the first mounting port and the second mounting port being arranged opposite to each other. The light-gathering module is fixedly installed at the first mounting port; The receiving module includes a photoelectric lens assembly, a photoelectric fixing assembly, and a clamping ring. The photoelectric lens assembly is fixedly installed at the second mounting port. The photoelectric fixing assembly has a connecting ring. Multiple through-hole adjustment gaps are provided on the circumferential sidewall of the connecting ring. The adjustment gaps include a first axial gap, a circumferential gap, and a second axial gap connected in sequence. The first axial gap and the second axial gap are parallel to the axis of the connecting ring. The length extension direction of the circumferential gap is perpendicular to the axis of the connecting ring, and the end of the second axial gap away from the circumferential gap extends to the end of the connecting ring near the photoelectric lens assembly. The clamping ring is sleeved on the outside of the connecting ring and can tighten the connecting ring. The photoelectric lens assembly has a connecting post. The end of the connecting post away from the colorimetric cell passes through the connecting ring. In the axial direction of the connecting ring, the length of the connecting post extending into the connecting ring is not greater than the distance from the circumferential gap to the end of the connecting ring near the colorimetric cell.
2. The self-centring optical path receiving device according to claim 1, characterized in that: The photoelectric fixing assembly includes a photoelectric fixing base, a shock absorber, and a light signal sensor; The photoelectric fixing base has a support groove, and one end of the photoelectric fixing base is the connecting ring. The inner cavity of the support groove is connected to the inside of the connecting ring through a connecting hole. The inner diameter of the connecting hole is smaller than the inner diameter of the support groove. The shock absorber includes an outer ring plate, an inner ring plate, and multiple connecting arc-shaped stiffeners; the inner ring plate is disposed inside the outer ring plate, and each of the connecting arc-shaped stiffeners is located between the inner side of the outer ring plate and the outer side of the inner ring plate; each of the connecting arc-shaped stiffeners is circumferentially distributed around the axis of the inner ring plate, one end of each connecting arc-shaped stiffener is fixedly connected to the inner sidewall of the outer ring plate, and the other end of each connecting arc-shaped stiffener is fixedly connected to the outer sidewall of the inner ring plate; The optical signal sensor is fixedly installed inside the inner ring plate, and the outer ring plate is fixedly installed inside the support groove.
3. The self-centring optical path receiving device according to claim 2, characterized in that: Multiple first protruding ribs are fixedly provided on the inner sidewall of the outer ring plate. Each first protruding rib corresponds to a connecting arc-shaped rib, and the connection between the connecting arc-shaped rib and the inner ring plate is opposite to the position of the first protruding rib.
4. The self-centring optical path receiving device according to claim 2, characterised in that: Multiple second protruding ribs are fixedly provided on the outer side wall of the inner ring plate. Each second protruding rib corresponds to a connecting arc-shaped rib plate, and the second protruding rib is opposite to a first position on the connecting arc-shaped rib plate. The length between the end of the connecting arc-shaped rib plate near the first position and the first position is 1 / 3 of the total length of the connecting arc-shaped rib plate.
5. The self-centering optical path receiving device according to claim 2, characterized in that: The photoelectric fixing assembly also includes a filter, which is fixedly disposed in the mounting groove between the shock absorber and the connecting hole.
6. The self-centering optical path receiving device according to claim 2, characterized in that: The photoelectric fixing assembly also includes a circuit board, which is fixedly disposed at the end of the photoelectric fixing base away from the photoelectric lens assembly; The circuit board is fixedly connected to the optical signal sensor via multiple pins; One end of the optical signal sensor is fixed with a limiting ring plate, the outer diameter of which is larger than the inner diameter of the inner ring plate.
7. The self-centering optical path receiving device according to claim 1, characterized in that: The photoelectric lens assembly has a mounting plate with multiple elongated holes. Multiple connecting screws are fixed on the outer wall of the colorimetric cell. Each elongated hole corresponds to one of the connecting screws. A fixing nut is threaded onto the portion of the connecting screw that extends out of the elongated hole.
8. The self-centering optical path receiving device according to claim 1, characterized in that: The light-gathering module includes a lens mounting base, a lens ring pressure plate, and a light-gathering lens; The lens holder is fixedly mounted on the colorimetric cell at the first mounting port; the lens holder is provided with a through light-entry channel, which corresponds to the position of the first mounting port; The lens annular pressure plate is used to fix the lens holder at the end away from the colorimetric cell; the end of the lens annular pressure plate near the lens holder is provided with a first lens mounting groove; The light-gathering lens is fixedly installed in the first lens mounting slot.
9. The self-centering optical path receiving device according to claim 6, characterized in that: The circuit board is provided with at least two arc-shaped grooves, and the end of the photoelectric mounting base away from the photoelectric lens assembly is provided with at least two connection mounting holes. A connector passes through each arc-shaped groove, and the connector is fixedly connected to one of the connection mounting holes.
10. The self-centering optical path receiving device according to claim 7, characterized in that: The photoelectric lens assembly includes a photoelectric lens block, a photoelectric lens plate, and a receiving lens; The photoelectric lens pressing block has a through receiving channel; a second lens mounting slot is provided at the end of the photoelectric lens pressing block near the colorimetric cell; the connecting post is formed at the end of the photoelectric lens pressing block away from the colorimetric cell. The photoelectric lens plate has a through hole, and each of the elongated holes is provided on the photoelectric lens plate; The receiving lens is fixedly installed in the second lens mounting slot.