Signal receiving device for laser ranging and method for compensating received signal

Abstract

The application discloses a signal receiving device and a receiving signal compensation method for laser ranging, and relates to the technical field of laser ranging. In the signal receiving device for laser ranging, an optical system comprises a lens barrel and an optical assembly arranged in the lens barrel. Both ends of the lens barrel are open in a first direction, forming an incident end and an emitting end for laser passing. The optical assembly is used for adjusting the laser light path incident from the incident end. An adjusting structure is detachably arranged at the emitting end and can rotate along an axis extending in the first direction. The adjusting structure is provided with a light transmission hole extending in the first direction. The axis of the light transmission hole is arranged in parallel with the rotation axis of the adjusting structure. A signal receiving structure is arranged at one end of the adjusting structure away from the lens barrel. A light sensitive surface of the signal receiving structure is arranged in coincidence with the laser light line for receiving the laser signal. Thus, the structure is simple, the adjusting operation is convenient, the original parts of the optical system do not need to be reworked, the correction difficulty and the production cost are reduced, and the error compensation cost is low.

Description

Technical Field

[0001] This invention relates to the field of laser ranging technology, and in particular to a signal receiving device and a signal compensation method for laser ranging. Background Technology

[0002] A laser rangefinder consists of a laser, optical system components, circuit system components, and mechanical structure components. It calculates the target distance by illuminating the target with a pulsed laser and measuring the time difference (the time required for the light to travel one round trip) between the emitted laser beam and the reflected echo from the target. The transmitting system determines the size of the laser beam spot on the target; the receiving system determines the rangefinder's distance-measuring capability.

[0003] However, during the processing and assembly of each lens in the optical system, eccentricity errors inevitably occur. When multiple eccentricity errors are superimposed, the center of the laser receiving optical path deviates from the design value. As a result, after the light is emitted from the optical system, the center of the light spot does not coincide with the center of the photosensitive surface of the receiving chip, reducing the received energy of the echo signal. Consequently, the ranging capability of the laser rangefinder fails to meet the design requirements, and in severe cases, it may even become unusable.

[0004] Existing laser rangefinder receiving systems cannot balance ease of adjustment and compensation cost when addressing errors caused by optical path eccentricity. Most require rework and adjustment of existing optical components, which is difficult to calibrate, has high production costs, is cumbersome to operate, and has high error compensation costs. Summary of the Invention

[0005] The main objective of this invention is to propose a signal receiving device and a signal compensation method for laser ranging. This invention aims to improve the existing laser rangefinder receiving systems, which cannot balance the ease of adjustment and compensation cost when solving the error problem caused by optical path eccentricity. Most of them require rework and adjustment of the original optical components, which is difficult to correct, has high production costs, is cumbersome to operate, and has high error compensation costs.

[0006] To achieve the above objectives, the signal receiving device for laser ranging proposed in this invention is applied to a laser rangefinder. The signal receiving device for laser ranging includes: An optical system includes a lens barrel and an optical component disposed within the lens barrel. The lens barrel is open at both ends in a first direction to form an incident end and an exit end for laser to pass through. The optical component is used to adjust the laser beam path incident from the incident end. An adjustment structure is provided at the emission end and detachably connected to the lens barrel. The adjustment structure is rotatable along an axis extending in a first direction. A light-transmitting hole is provided through the adjustment structure along the first direction, and the axis of the light-transmitting hole is parallel to the rotation axis of the adjustment structure. A signal receiving structure is located at the end of the adjustment structure away from the lens barrel. The photosensitive surface of the signal receiving structure is aligned with the laser beam to receive the laser signal passing through the optical component and the light-transmitting aperture.

[0007] In one embodiment, the distance between the axis of the light-transmitting hole and the rotation axis of the adjustment structure is A, where A ≥ 0.05 mm.

[0008] In one embodiment, the adjustment structure includes: An eccentric bushing is inserted into the emission end and fixedly fitted with the emission end. The eccentric bushing is provided with the light-transmitting hole, and a filter is provided corresponding to the light-transmitting hole. The filter is used to filter out stray light. A mounting base, disposed on an eccentric bushing and connected to the signal receiving structure, is provided with a through hole corresponding to the light-transmitting hole, the through hole being used for laser transmission; and... The limiting structure includes a limiting part and a mating part, one of which is provided on the mounting base and the other is provided on the eccentric bushing. The limiting part and the mating part are used to jointly limit the relative rotation of the mounting base and the eccentric bushing.

[0009] In one embodiment, the limiting portion includes a protrusion that protrudes from one end of the mounting base toward the biased bushing in a first direction; The mating part includes a mating groove, which is recessed at one end of the eccentric bushing facing the mounting base in a first direction and is provided corresponding to the protrusion. The mating groove and the protrusion are inserted into each other.

[0010] In one embodiment, the mounting base is made of an insulating material.

[0011] In one embodiment, the adjustment structure is further provided with an marking part, which is located on the periphery of the light-transmitting hole and is used to mark the off-center position of the light-transmitting hole.

[0012] The present invention also proposes a received signal compensation method. Based on the above-mentioned signal receiving device for laser ranging, the received signal compensation method includes: An adjustment structure is installed at the exit end of the lens barrel, and the adjustment structure is driven to rotate the light-transmitting hole in the first direction to adjust the position of the light-transmitting hole. At the same time, the electrical signal strength output by the signal receiving structure at different positions of the light-transmitting hole is recorded. When the electrical signal strength reaches its maximum value, the relative position of the adjustment structure and the lens barrel is fixed to complete the compensation and correction of signal reception.

[0013] In one embodiment, the step of installing the adjustment structure on the exit end of the lens barrel, driving the adjustment structure to rotate the light-transmitting aperture along a first direction to adjust the position of the light-transmitting aperture, and simultaneously recording the electrical signal strength output by the signal receiving structure at different positions of the corresponding light-transmitting aperture includes: The adjusting structure is rotated along an axis extending in a first direction by being driven by an insulating object.

[0014] In one embodiment, after the steps of installing the adjustment structure on the exit end of the lens barrel, driving the adjustment structure to rotate the light-transmitting aperture along the first direction to adjust the position of the light-transmitting aperture, and simultaneously recording the electrical signal strength output by the signal receiving structure at different positions of the corresponding light-transmitting aperture, the method further includes: The adjustment structures with different eccentric distances are replaced, and the electrical signal strength output by the signal receiving structure is recorded at different positions of the light-transmitting holes corresponding to the multiple adjustment structures.

[0015] In one embodiment, the adjustment structure is further provided with an marking part, which is located on the periphery of the light-transmitting hole and is used to mark the off-center position of the light-transmitting hole; The step of replacing the adjustment structure with different eccentric distances and recording the electrical signal strength output by the signal receiving structure at different positions of the light-transmitting holes corresponding to multiple adjustment structures includes: When the electrical signal strength corresponding to the current adjustment structure reaches its maximum value, the position of the marker is recorded; According to the recorded position of the marking part, the adjustment structure with different eccentric distances is replaced, and the marking part of the adjustment structure is made to correspond to the recorded position of the marking part; The adjustment structure is driven to rotate within a preset angle range, and the electrical signal strength output by the signal receiving structure at different positions during the rotation is recorded.

[0016] In the technical solution of this invention, after the laser rangefinder is processed and assembled, there are inevitably processing errors in the installation position of the optical components. This causes the laser landing point after passing through the optical system to deviate from the center position of the photosensitive surface of the signal receiving structure. Consequently, the laser signal cannot fall entirely on the photosensitive surface, and the signal strength received by the signal receiving structure is weakened, which easily leads to large errors and poor stability in the ranging result. This invention provides an adjustment structure with a light-transmitting hole at the exit end of the lens barrel. Since the axis of the light-transmitting hole is parallel to the rotation axis of the adjustment structure, the light-transmitting hole is eccentrically positioned with the rotation axis of the adjustment structure as the eccentric reference. Rotating the adjustment structure can adjust the position of the light-transmitting hole on the plane perpendicular to the first direction, thereby adjusting the position of the laser landing point on the photosensitive surface after passing through the light-transmitting hole. This allows the laser landing point to be as close as possible to the center position of the photosensitive surface, maximizing the electrical signal strength output by the signal receiving structure. This compensates for the processing and assembly errors caused by the optical components and improves the accuracy and stability of laser ranging. This setup is simple in structure and convenient in adjustment. It does not require rework or adjustment of the original components of the optical system, which reduces the difficulty of calibration and production costs. It is easy to operate and has low error compensation costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an embodiment of the signal receiving device for laser ranging provided by the present invention. Figure 2 for Figure 1 A schematic diagram of the regulating structure in the middle; Figure 3 This is a flowchart illustrating the first embodiment of the received signal compensation method provided by the present invention; Figure 4 This is a flowchart illustrating a second embodiment of the received signal compensation method provided by the present invention. Figure 5 This is a flowchart illustrating the third embodiment of the received signal compensation method provided by the present invention; Figure 6 This is a flowchart illustrating the fourth embodiment of the received signal compensation method provided by the present invention.

[0019] Explanation of icon numbers: 100. Signal receiving device for laser ranging; 1. Optical system; 11. Lens tube; 2. Adjustment structure; 21. Eccentric bushing; 211. Light passage hole; 22. Mounting base; 23. Limiting structure; 231. Limiting part; 232. Fitting part; 3. Signal receiving structure.

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0024] A laser rangefinder consists of a laser, optical system components, circuit system components, and mechanical structure components. It calculates the target distance by illuminating the target with multiple pulses and measuring the time difference (the time required for the light to travel one round trip) between the main wave emitted by the laser and the echo reflected from the target. The transmitting system determines the size of the laser beam spot on the target; the receiving system determines the rangefinder's distance measurement capability.

[0025] However, during the processing and assembly of each lens in the optical system, eccentricity errors inevitably occur. When multiple eccentricity errors are superimposed, the center of the laser receiving optical path deviates from the design value. As a result, after the light is emitted from the optical system, the center of the light spot does not coincide with the center of the photosensitive surface of the receiving chip, reducing the received energy of the echo signal. Consequently, the ranging capability of the laser rangefinder fails to meet the design requirements, and in severe cases, it may even become unusable.

[0026] Existing laser rangefinder receiving systems cannot balance ease of adjustment and compensation cost when addressing errors caused by optical path eccentricity. Most require rework and adjustment of existing optical components, which is difficult to calibrate, has high production costs, is cumbersome to operate, and has high error compensation costs.

[0027] This invention proposes a signal receiving device for laser ranging. It aims to improve upon existing laser rangefinder receiving systems, which, when addressing errors caused by optical path eccentricity, fail to balance ease of adjustment with compensation costs. Most systems require rework and adjustment of existing optical components, resulting in high calibration difficulty, high production costs, cumbersome operation, and high error compensation costs.

[0028] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the signal receiving device 100 for laser ranging is applied to a laser rangefinder. The signal receiving device 100 for laser ranging includes an optical system 1, an adjustment structure 2, and a signal receiving structure 3. The optical system 1 includes a lens barrel 11 and an optical component disposed within the lens barrel 11. The lens barrel 11 is open at both ends in a first direction to form an incident end and an exit end for laser to pass through. The optical component is used to adjust the laser beam path incident from the incident end. The adjustment structure 2 is disposed at the exit end and is detachably connected to the lens barrel 11. The adjustment structure 2 is rotatable along an axis extending in the first direction. The adjustment structure 2 has a light-transmitting hole 211 extending in the first direction. The axis of the light-transmitting hole 211 is parallel to the rotation axis of the adjustment structure 2. The signal receiving structure 3 is disposed at the end of the adjustment structure 2 away from the lens barrel 11. The photosensitive surface of the signal receiving structure 3 coincides with the laser beam and is used to receive the laser signal passing through the optical component and the light-transmitting hole 211.

[0029] In the technical solution of this invention, after the laser rangefinder is processed and assembled, the installation position of the optical components inevitably has processing errors. This causes the laser landing point after passing through the optical system 1 to deviate from the center position of the photosensitive surface of the signal receiving structure 3, resulting in the laser signal not falling entirely on the photosensitive surface. Consequently, the signal strength received by the signal receiving structure 3 is weakened, easily leading to larger errors and poor stability in the ranging result. This invention addresses this by setting an adjustment structure 2 with the light-transmitting hole 211 at the exit end of the lens barrel 11. Since the axis of the light-transmitting hole 211 is aligned with the center position of the photosensitive surface, the laser signal cannot fall entirely on the photosensitive surface. This weakens the signal strength received by the signal receiving structure 3, easily leading to larger errors and poor stability in the ranging result. The rotating shaft of the adjustment structure 2 is parallel to the center. Therefore, with the rotating shaft of the adjustment structure 2 as the eccentric reference, the light-transmitting hole 211 is eccentrically positioned. Rotating the adjustment structure 2 adjusts the position of the light-transmitting hole 211 on the plane perpendicular to the first direction, thereby adjusting the position of the laser landing point on the photosensitive surface through the light-transmitting hole 211. This ensures that the laser landing point is as close as possible to the center of the photosensitive surface, maximizing the electrical signal strength output by the signal receiving structure 3. This compensates for the processing and assembly errors caused by optical components, improving the accuracy and stability of laser ranging. This configuration is simple in structure, convenient in adjustment, and eliminates the need for rework and adjustment of the original components of the optical system 1, reducing calibration difficulty and production costs. It is easy to operate and has low error compensation costs.

[0030] It should be noted that in this invention, the adjustment structure 2 is only movable during the compensation and correction of the signal receiving device 100 for laser ranging, so that it can rotate relative to the lens barrel 11. After the correction is completed, the adjustment structure 2 is fixed relative to the lens barrel 11 to complete the correction. In subsequent use, the adjustment structure 2 does not need to be rotated again. Therefore, the fixed structure has good stability and will not easily shift its position, ensuring the long-term stability of laser ranging accuracy.

[0031] Of course, when the adjustment structure 2 needs to be fixed relative to the lens barrel 11 after the calibration is completed, the present invention does not limit the specific fixing form of the adjustment structure 2 and the lens barrel 11. In the present invention, the adjustment structure 2 and the lens barrel 11 can be fixed by adhesive bonding. In this way, the operation is simple, the sealing and stability of the adhesive bonding are good, and the fixing requirements can be met. Moreover, the adhesive bonding form will not generate additional eccentric error during the fixing process, which is conducive to ensuring the positional accuracy after calibration. The adhesive bonding operation is simple, the requirements for the machining accuracy of the parts are low, and the production cost can be further reduced.

[0032] The adjustment structure 2 and the lens barrel 11 can also be fixed by an interference fit. In this way, no additional adhesive material is needed, the assembly process is simpler, and it is easier to process and mass-produce. It also makes it easier to disassemble and replace the adjustment structure 2 with different eccentric distances to meet the needs of multiple calibrations.

[0033] It should also be noted that the present invention does not limit the specific value of the distance between the axis of the light-transmitting aperture 211 and the rotation axis of the adjustment structure 2. In one embodiment of the present invention, the distance between the axis of the light-transmitting aperture 211 and the rotation axis of the adjustment structure 2 is A, where A ≥ 0.05 mm. This setting can cover most of the eccentricity error range generated during the processing and assembly of the laser rangefinder optical system 1, ensuring that most common eccentricity deviations can be compensated and corrected by rotating the adjustment structure 2, thus improving adaptability. Of course, in practical applications, the eccentricity distance range can be adjusted according to the accuracy requirements of the laser rangefinder optical system 1 to meet the error compensation needs of different accuracy levels.

[0034] In actual setup, multiple different adjustment structures 2, each with a different distance between the axis of the light-transmitting hole 211 and the rotation axis of the adjustment structure 2, can be installed sequentially at the exit end of the lens barrel 11. The compensation effects of multiple adjustment structures 2 can be compared, and the adjustment structure 2 with the best effect can be selected and fixed to the lens barrel 11. This can accommodate a wider range of eccentricity errors, further improve the compensation and correction effect, and meet the correction requirements of the signal receiving device 100 for laser ranging under various error conditions.

[0035] In a further embodiment of the invention, when different adjustment structures 2 are replaced sequentially, to improve the efficiency of compensation effect detection, the adjustment structure 2 is further provided with a marking part located on the periphery of the light-transmitting hole 211 to mark the off-center position of the light-transmitting hole 211. With this configuration, when replacing different adjustment structures 2, the approximate position of the light-transmitting hole 211 can be quickly aligned by identifying the position of the marking part. It is not necessary to start adjusting from the initial angle to find the position of maximum signal strength; only a small-range rotation adjustment is needed after alignment, effectively improving calibration efficiency and reducing the workload of calibration operations.

[0036] In a further embodiment of the present invention, the adjustment structure 2 is configured as a circular adjustment plate, the outer wall of which is used to mate with the inner wall of the exit end of the lens barrel 11. By configuring the adjustment structure 2 as a circular plate, it is convenient for rotational adjustment along the axis of rotation, and it can also be adapted to the cylindrical structure of the lens barrel 11, facilitating installation and assembly, and its structure is simple and easy to manufacture.

[0037] Specifically, in this invention, to improve the shock resistance of the signal receiving device 100 for laser ranging, so that the signal receiving device 100 for laser ranging can still maintain the coaxiality of the laser optical path and the photosensitive surface of the signal receiving structure 3 during vibration and shock tests, in one embodiment of this invention, the adjusting structure 2 includes an eccentric bushing 21, a mounting base 22, and a limiting structure 23. The eccentric bushing 21 is inserted into the output end and fixedly fitted to the output end. The eccentric bushing 21 is provided with the light-transmitting hole 211, and corresponding to the light-transmitting hole 211 is provided with... The device includes a filter for filtering out stray light. The mounting base 22 is disposed on the eccentric bushing 21 and connected to the signal receiving structure 3. The mounting base 22 has a through hole corresponding to the light-transmitting hole 211, which allows the laser to pass through. The limiting structure 23 includes a limiting part 231 and a mating part 232. One of the limiting part 231 and the mating part 232 is disposed on the mounting base 22, and the other is disposed on the eccentric bushing 21. The limiting part 231 and the mating part 232 are used to jointly limit the relative rotation of the mounting base 22 and the eccentric bushing 21.

[0038] In this embodiment, the eccentric bushing 21 is an adjusting seat, and compared to traditional adjusting seats, it does not require threaded fixing. This saves space and improves structural stability, preventing the adjusting structure 2 from loosening or shifting due to vibration after long-term use, ensuring the long-term accuracy of the compensation position. Furthermore, during impact testing, there is no need to consider the misalignment caused by loose threads, effectively improving impact resistance and ensuring the working stability of the signal receiving device 100 used for laser ranging under complex conditions. The mounting base 22 is used to stably fix the signal receiving structure 3, and the relative position of the mounting base 22 and the eccentric bushing 21 is locked by the limiting structure 23, further preventing relative displacement between the two during subsequent use, consolidating the correction and compensation effect. The limiting fit structure is simple, the locking operation is convenient, and it does not add extra complexity to the assembly and correction, allowing the corrected optical path state to remain stable for a long time, with stronger impact and vibration resistance.

[0039] It is understood that replacing different adjustment structures 2 in sequence means replacing different eccentric bushings 21 in sequence.

[0040] It should be noted that the present invention does not limit the specific structural form of the limiting structure 23. In one embodiment of the present invention, the limiting part 231 can be configured as a positioning hole, and the mating part 232 can be configured as a positioning pin. The positioning pin passes through the positioning hole to achieve limiting. This structure has high positioning accuracy and can accurately lock the corrected relative position to avoid position deviation.

[0041] In another embodiment of the present invention, the limiting part 231 includes a protrusion disposed at one end of the mounting base 22 facing the eccentric bushing 21 in a first direction, and the mating part 232 includes a mating groove disposed at one end of the eccentric bushing 21 facing the mounting base 22 in the first direction and corresponding to the protrusion, wherein the mating groove and the protrusion are inserted into each other. This configuration simplifies the processing of the insertion-fit structure, allows for direct positioning, and enables rapid alignment during installation without requiring additional complex assembly steps, thus improving the efficiency of calibration and assembly. Furthermore, the insertion-fit structure offers good stability, effectively limiting the relative rotation of the mounting base 22 and the eccentric bushing 21, meeting the requirements for limiting and locking, and does not occupy excessive installation space, thus maintaining the compactness of the overall structure of the signal receiving device 100 for laser ranging.

[0042] Of course, it is understood that the mounting base 22 provides a mounting foundation for the signal receiving structure 3. In a further embodiment of the invention, to ensure the installation stability and light transmission of the mounting base 22, the mounting base 22 is cylindrical. Thus, the sidewalls of the mounting base 22 can provide surrounding protection for the signal receiving structure 3 and the eccentric bushing 21, reducing the erosion of internal optical components and the signal receiving structure 3 by external dust and moisture, extending their service life. Simultaneously, the cylindrical structure itself has good rigidity and is not easily deformed, ensuring the relative positional accuracy of each component after installation. It also facilitates overall disassembly and maintenance, has a simple structure, is easy to process and form, and has low processing costs.

[0043] It should also be noted that, in this invention, to further reduce the manufacturing difficulty and overall weight of the signal receiving device 100 for laser ranging, the marking part and the limiting part 231 are integrally formed. This eliminates the need for separate fabrication of the marking part, reducing processing steps, costs, and manufacturing difficulty. It also avoids increasing the overall size and weight of the device due to additional components, thus maintaining the compact structure of the signal receiving device 100 for laser ranging. Furthermore, the integrally formed structure offers higher structural strength, stable marking position accuracy, and prevents misalignment of the marking part, ensuring long-term accuracy and meeting the positioning and identification requirements during calibration.

[0044] Furthermore, in some cases, the signal receiving structure 3 requires insulation during installation. Therefore, to ensure the insulation requirements of the signal receiving structure 3, in a further embodiment of the present invention, the mounting base 22 is made of insulating material. With this configuration, since the mounting base 22 provides the mounting foundation for the signal processing structure, it can achieve electrical insulation between the signal receiving structure 3 and the lens barrel 11 and the eccentric bushing 21, preventing interference with the circuit signals, ensuring stable and accurate output laser echo signals, reducing signal noise interference, and improving the stability and ranging accuracy of signal reception. Simultaneously, the insulating material generally has a low density, which can further reduce the overall weight of the signal receiving device 100 used for laser ranging, meeting the lightweight design requirements of laser rangefinders.

[0045] The present invention also proposes a received signal compensation method, which is based on the above-described signal receiving device 100 for laser ranging. The specific structure of the signal receiving device 100 for laser ranging is as described in the above embodiments. Since the received signal compensation method adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0046] Please see Figure 3 In the first embodiment of the present invention, the compensation method for the received signal includes: Step S10: Install the adjustment structure 2 on the exit end of the lens barrel 11, and drive the adjustment structure 2 to rotate the light-transmitting hole 211 in the first direction to adjust the position of the light-transmitting hole 211, and at the same time record the electrical signal strength output by the signal receiving structure 3 at different positions of the light-transmitting hole 211. It is understandable that by rotating the adjustment structure 2, all possible positions of the light-transmitting aperture 211 on the plane perpendicular to the first direction can be determined in sequence, and the electrical signal strength corresponding to different positions can be recorded simultaneously. This allows for a direct comparison of the differences in signal reception at different positions. The operation process is simple and clear, and the initial detection can be completed without disassembling the original optical system components, which greatly simplifies the preliminary operation steps of compensation and correction.

[0047] Step S20: When the electrical signal strength reaches its maximum value, fix the relative position of the adjustment structure 2 and the lens barrel 11 to complete the compensation and correction of signal reception.

[0048] It is understandable that using the electrical signal strength output by the signal receiving structure 3 as the basis for correction is intuitive and accurate. It can directly correspond to the degree of overlap between the laser landing point and the center of the photosensitive surface. A large electrical signal strength indicates a high degree of overlap between the laser landing point and the center of the photosensitive surface, ensuring that the signal strength after correction reaches the optimal state, minimizing the error caused by optical path eccentricity, and making the correction result accurate and reliable. After fixing, it can be put into use directly without repeated verification, and the correction efficiency is high.

[0049] In this embodiment, the optimal position with the strongest electrical signal can be quickly found by rotating the adjustment structure 2. The operation is simple and intuitive, with a low calibration threshold, allowing ordinary operators to complete the calibration work. This reduces the calibration difficulty of the signal receiving device 100 used for laser ranging, making it suitable for rapid calibration operations in mass production and effectively improving production efficiency. Furthermore, this compensation method directly uses the output electrical signal strength as the judgment criterion, perfectly matching the actual working requirements of laser ranging. It effectively solves the problems of weak signal and unstable ranging caused by processing and assembly errors. The compensation effect is intuitive and quantifiable, the calibration quality is easy to control, and it can stably ensure that the ranging accuracy of each product meets the requirements.

[0050] Please see Figure 4 In the second embodiment of the present invention, step S10 includes: Step S11: The adjusting structure 2 is rotated along the axis extending in the first direction by an insulating object.

[0051] In this embodiment, using an insulating object to rotate the adjustment structure 2 can prevent the operator's hand or metal tools from blocking the light-transmitting hole 211 during rotation, and will not cause short-circuit interference to the live parts of the signal receiving structure 3, ensuring the accuracy of signal detection during rotation adjustment. At the same time, the insulating object has low hardness and is not easy to scratch the mating surfaces of the adjustment structure 2 or the lens barrel 11, which can protect the surface precision of the parts and avoid additional damage to the parts during adjustment, thus improving operational safety.

[0052] It should be noted that in this embodiment, the adjustment structure 2 is rotated by an insulating object. In fact, the operator rotates the adjustment structure 2 by holding the insulating object and turning it. There is no need to set additional auxiliary structures such as operating lugs for the adjustment structure 2. The original mating dimensions of the adjustment structure 2 will not be changed, and no additional installation space will be occupied inside the device. The overall structure of the device can be kept compact, and interference between the auxiliary structure and other internal parts can be avoided.

[0053] Please see Figure 5 In the third embodiment of the present invention, after step S10, the method further includes: Step S12: Replace the adjustment structure 2 with different eccentric distances, and record the electrical signal strength output by the signal receiving structure 3 at different positions of the light-transmitting holes 211 corresponding to the multiple adjustment structures 2.

[0054] In this embodiment, by sequentially installing multiple adjustment structures 2 with different distances between the axis of the light-transmitting aperture 211 and the rotation axis of the adjustment structure 2 at the exit end of the lens barrel 11, the compensation effects of multiple adjustment structures 2 are compared. This allows for adaptation to a wider range of initial eccentricity errors. Even if the initial eccentricity deviation during processing and assembly exceeds the eccentricity compensation range of a single adjustment structure 2, the optimal solution can be found by replacing adjustment structures 2 with different eccentricity distances. This further improves the adaptability of the compensation and correction, covering more processing and assembly errors of varying degrees. It ensures that the best signal reception effect can be obtained in most deviation situations, thereby selecting the adjustment structure 2 with the best effect and fixing it to the lens barrel 11, further improving the compensation and correction effect and adapting to the correction requirements of the signal receiving device 100 for laser ranging under various error conditions.

[0055] Please see Figure 6 In the fourth embodiment of the present invention, step S12 includes: Step S121: When the electrical signal strength corresponding to the current adjustment structure 2 reaches its maximum value, record the position of the marking section; Preferably, when the electrical signal strength reaches its maximum value, it indicates that the current adjustment structure 2 is in the optimal position under the eccentric distance. After recording the position of the marking part, it is convenient to quickly correspond to the optimal position during subsequent comparison, reduce repeated confirmation operations, and improve comparison efficiency.

[0056] Step S122: According to the recorded position of the marking part, the adjustment structure 2 with different eccentric distances is replaced, and the marking part of the adjustment structure 2 is made to correspond to the recorded position of the marking part; With this configuration, the replaced adjustment structure 2 can quickly locate the optimal eccentricity direction based on the previously recorded identification position, without having to start the scan from scratch to find the optimal direction. This significantly shortens the comparison and detection time of multiple adjustment structures 2, further improves the overall efficiency of compensation and correction, and reduces the workload of repetitive operations.

[0057] Step S123: Drive the adjustment structure 2 to rotate within a preset angle range, and record the electrical signal strength output by the signal receiving structure 3 at different positions during the rotation.

[0058] It is understandable that after replacing the adjustment structure 2, only the angle of the adjustment structure 2 needs to be finely adjusted within a preset small angle range to find the optimal position under the current eccentricity distance, without taking up too much adjustment time. At the same time, it can ensure that the optimal signal strength of each adjustment structure 2 can be accurately detected, without missing the optimal position, and can greatly improve the detection and comparison efficiency of multiple adjustment structures 2, making the whole compensation and correction process faster.

[0059] In the technical solution of this embodiment, by limiting the rotation range of the adjustment structure 2 by the preset angle range, and combining it with the approximate optimal direction obtained by the previous positioning by the marking part, the positioning process of the new adjustment structure 2 can always be carried out around the optimal direction. Only a small range of fine adjustment is needed near this position to determine the position of the maximum electrical signal strength of the current adjustment structure 2. There is no need to repeatedly scan within the full angle range, which not only ensures the accuracy of signal strength detection, but also further reduces the time consumption of adjustment detection, making the replacement detection process of multiple adjustment structures 2 smoother. At the same time, this method does not require additional complex hardware structures. Efficiency can be improved simply by adjusting the adjustment steps. It is compatible with existing signal reception compensation and correction processes, has low modification costs, and strong applicability.

[0060] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A signal receiving device for laser ranging, characterized in that, The signal receiving device for laser ranging, applied to a laser rangefinder, includes: An optical system includes a lens barrel and an optical component disposed within the lens barrel. The lens barrel is open at both ends in a first direction to form an incident end and an exit end for laser to pass through. The optical component is used to adjust the laser beam path incident from the incident end. An adjustment structure is provided at the emission end and detachably connected to the lens barrel. The adjustment structure is rotatable along an axis extending in a first direction. A light-transmitting hole is provided through the adjustment structure along the first direction, and the axis of the light-transmitting hole is parallel to the rotation axis of the adjustment structure. A signal receiving structure is located at the end of the adjustment structure away from the lens barrel. The photosensitive surface of the signal receiving structure is aligned with the laser beam to receive the laser signal passing through the optical component and the light-transmitting aperture. The adjustment structure includes: An eccentric bushing is inserted into the emission end and fixedly fitted with the emission end. The eccentric bushing is provided with the light-transmitting hole, and a filter is provided corresponding to the light-transmitting hole. The filter is used to filter out stray light. A mounting base, disposed on an eccentric bushing and connected to the signal receiving structure, is provided with a through hole corresponding to the light-transmitting hole, the through hole being used for laser transmission; and... The limiting structure includes a limiting part and a mating part, one of which is provided on the mounting base and the other is provided on the eccentric bushing. The limiting part and the mating part are used to jointly limit the relative rotation of the mounting base and the eccentric bushing.

2. The signal receiving device for laser ranging as described in claim 1, characterized in that, The distance between the axis of the light-transmitting hole and the rotating shaft of the adjustment structure is A, where A ≥ 0.05 mm.

3. The signal receiving device for laser ranging as described in claim 1, characterized in that, The limiting part includes a protrusion, which protrudes from one end of the mounting base toward the eccentric bushing in a first direction; The mating part includes a mating groove, which is recessed at one end of the eccentric bushing facing the mounting base in a first direction and is provided corresponding to the protrusion. The mating groove and the protrusion are inserted into each other.

4. The signal receiving device for laser ranging as described in claim 1, characterized in that, The mounting base is made of insulating material.

5. The signal receiving device for laser ranging as described in claim 1, characterized in that, The adjustment structure is also provided with an marking part, which is located on the periphery of the light-transmitting hole and is used to mark the off-center position of the light-transmitting hole.

6. A method for compensating received signals, characterized in that, Based on the signal receiving device for laser ranging as described in any one of claims 1 to 5, the compensation method for the received signal includes: An adjustment structure is installed at the exit end of the lens barrel, and the adjustment structure is driven to rotate the light-transmitting hole in the first direction to adjust the position of the light-transmitting hole. At the same time, the electrical signal strength output by the signal receiving structure at different positions of the light-transmitting hole is recorded. When the electrical signal strength reaches its maximum value, the relative position of the adjustment structure and the lens barrel is fixed to complete the compensation and correction of signal reception.

7. The received signal compensation method as described in claim 6, characterized in that, The steps of installing the adjustment structure on the exit end of the lens barrel, driving the adjustment structure to rotate the light-transmitting aperture along the first direction to adjust the position of the light-transmitting aperture, and simultaneously recording the electrical signal strength output by the signal receiving structure at different positions of the light-transmitting aperture include: The adjusting structure is rotated along an axis extending in a first direction by being driven by an insulating object.

8. The received signal compensation method as described in claim 6, characterized in that, After the steps of installing the adjustment structure on the exit end of the lens barrel, driving the adjustment structure to rotate the light-transmitting aperture along the first direction to adjust the position of the light-transmitting aperture, and simultaneously recording the electrical signal strength output by the signal receiving structure at different positions of the light-transmitting aperture, the method further includes: The adjustment structures with different eccentric distances are replaced, and the electrical signal strength output by the signal receiving structure is recorded at different positions of the light-transmitting holes corresponding to the multiple adjustment structures.

9. The received signal compensation method as described in claim 8, characterized in that, The adjustment structure is also provided with an marking part, which is located on the periphery of the light-transmitting hole and is used to mark the off-center position of the light-transmitting hole; The step of replacing the adjustment structure with different eccentric distances and recording the electrical signal strength output by the signal receiving structure at different positions of the light-transmitting holes corresponding to multiple adjustment structures includes: When the electrical signal strength corresponding to the current adjustment structure reaches its maximum value, the position of the marking section is recorded. According to the recorded position of the marking part, the adjustment structure with different eccentric distances is replaced, and the marking part of the adjustment structure is made to correspond to the recorded position of the marking part; The adjustment structure is driven to rotate within a preset angle range, and the electrical signal strength output by the signal receiving structure at different positions during the rotation is recorded.

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