Optical fiber photoelectric sensor

Abstract

The utility model discloses an optical fiber photoelectric sensor, which comprises an optical fiber, a shell arranged at the lower end of the optical fiber, an optical detector arranged inside the shell, a laser diode I arranged at the upper end of the optical fiber, and a fine tuning mechanism, the fine adjustment mechanism comprises a rectangular frame, a first annular seat, a first adjusting assembly, a second adjusting assembly and a calibration auxiliary assembly, the rectangular frame is located outside the first laser diode, the first annular seat is arranged on the outer side of the first laser diode, and the first adjusting assembly and the second adjusting assembly are arranged between the first annular seat and the rectangular frame. According to the optical fiber photoelectric sensor, alignment degree detection can be automatically carried out on the installation positions of the light source and the light detector in the device through the detection element, if the light source and the light detector are not aligned, local fine adjustment can be carried out on the installation point of the light source through the transmission element, and the accuracy of the optical fiber photoelectric sensor is improved. Therefore, the light source and the light detector are quickly aligned, and secondary disassembly and assembly operation is not needed.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically to a fiber optic photoelectric sensor. Background Technology

[0002] Fiber optic photoelectric sensors utilize optical fibers as the transmission medium, combined with photoelectric conversion technology, to achieve long-distance, high-precision object detection. Compared to traditional photoelectric sensors, fiber optic sensors are smaller in size, have finer spot diameters, and are adaptable to more demanding environmental conditions. A typical fiber optic photoelectric sensor includes a light source, optical fiber, and a photodetector. The light source emits light signals; fiber optic sensors typically use light-emitting diodes (LEDs) or laser diodes as the light source. The optical fiber is the medium for transmitting light signals. The photodetector receives and converts the light signals into electrical signals. When the light signal reaches the photodetector, it converts the light signal into an electrical signal, which can then be further processed and analyzed. In operation, the light source and photodetector are first installed in aligned positions. Then, the light source emits light signals, and the photodetector receives the light signals through its surface material and converts them into electrical signals using the photoelectric effect, achieving the purpose of measurement and detection. However, during the initial installation, the alignment of the installed light source and photodetector needs to be checked again. If their positions are not horizontally aligned, they need to be removed, and then the installation points need to be confirmed and reinstalled using measuring tools. This process is quite cumbersome. Therefore, we propose a fiber optic photoelectric sensor. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a fiber optic photoelectric sensor. This device can automatically detect the alignment of the installation positions of the light source and the photodetector in the device through the detection element. If the two are not aligned, the light source installation point can be locally fine-tuned through the transmission element, so that the light source and the photodetector can be quickly aligned without disassembly and reassembly. This can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a fiber optic photoelectric sensor, comprising an optical fiber, a housing at the lower end of the optical fiber, a photodetector inside the housing, a laser diode at the upper end of the optical fiber, and a fine-tuning mechanism;

[0005] Fine-tuning mechanism: It includes a rectangular frame, an annular seat 1, an adjustment component 1, an adjustment component 2, and a calibration auxiliary component. The rectangular frame is located outside the laser diode 1. The annular seat 1 is located outside the laser diode 1. The adjustment component 1 and the adjustment component 2 are respectively located between the annular seat 1 and the rectangular frame. The calibration auxiliary component is located between the laser diode 1 and the outer shell. This device can automatically detect the alignment of the installation positions of the light source and the photodetector inside the device through the detection element. If the two are not aligned, the light source installation point can be locally fine-tuned through the transmission element, so that the light source and the photodetector can be quickly aligned without disassembly and reassembly.

[0006] Furthermore, it also includes a control switch, which is located outside the optical fiber and whose input end is electrically connected to an external power supply, facilitating the control of electrical components within the device.

[0007] Furthermore, the adjustment component includes a dovetail groove, a rectangular shell, a rectangular slide rod, and a stud. The dovetail groove is formed on the front wall of the rectangular frame. The rectangular shell is slidably connected inside the dovetail groove. The rectangular slide rod is slidably connected to the rear end of the rectangular shell. The rear end of the rectangular slide rod is fixedly connected to the outer side of the annular seat. The upper and lower walls of the rectangular frame are rotatably connected to the stud via a bearing. The stud is threadedly connected to the front end of the rectangular shell, allowing for local vertical fine-tuning of the light source mounting point.

[0008] Furthermore, the second adjustment component includes a cross-shaped groove, a slide block, a second stud, and a threaded cylinder. The cross-shaped groove is opened on the rear wall of the rectangular frame. The slide block is slidably connected inside the cross-shaped groove. The middle part of the slide block is rotatably connected to the second stud through a second bearing. The front end of the second stud is threadedly connected to the threaded cylinder. The front end of the threaded cylinder is fixedly connected to the outer side of the first annular seat, allowing for local longitudinal fine-tuning of the light source mounting point.

[0009] Furthermore, the fine-tuning mechanism also includes an adjustment knob and a bellows. The adjustment knob is respectively located at the upper end of stud one and the rear end of stud two. Bellows are provided between the upper and lower walls of the rectangular frame and between the adjacent rectangular shells and between the threaded cylinder and the slide. The bellows are respectively movably sleeved on the outer ends of adjacent stud one and stud two, which facilitates the adjustment of the studs inside the fiber optic photoelectric sensor and the wrapping and protection of the parts of the studs exposed to the outside.

[0010] Furthermore, the calibration auxiliary component includes a ring seat two, a rectangular seat one, a laser diode two, a rectangular seat two, and a calibration slot. The ring seat two is disposed outside the laser diode one. Three rectangular seats one are evenly distributed outside the ring seat two. The center of each rectangular seat one is provided with a laser diode two. The input end of each laser diode two is electrically connected to the output end of the control switch. Three rectangular seats two are evenly distributed outside the housing. The center of each rectangular seat two is provided with a calibration slot. The laser diode two is installed in conjunction with the calibration slot to detect the alignment of the installation positions of the light source and the photodetector inside the device.

[0011] Furthermore, mounting bases are provided on the lower side of the rectangular frame and the lower side of the outer shell, and reinforcing ribs are provided inside the mounting bases to improve the structural strength of the mounting bases for the fiber optic photoelectric sensor.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This fiber optic photoelectric sensor has the following advantages:

[0013] When using fiber optic photoelectric sensors, the device can automatically detect the alignment of the installation positions of the light source and photodetector within the device through calibration auxiliary components. If the two are not aligned, the installation point of the light source can be locally adjusted vertically and longitudinally through the rectangular frame, ring seat one, adjustment component one, adjustment component two, and adjustment knob, so that the light source and photodetector can be quickly aligned without the need for personnel to disassemble the device, measure the installation point, and disassemble and reassemble, making the operation convenient. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the rectangular base structure of this utility model;

[0017] Figure 4 This is an enlarged structural diagram of point A in this utility model.

[0018] In the diagram: 1. Fiber optic cable; 2. Housing; 3. Photodetector; 4. Laser diode I; 5. Control switch; 6. Fine-tuning mechanism; 61. Rectangular frame; 62. Ring seat I; 63. Adjustment component I; 631. Dovetail groove; 632. Rectangular housing; 633. Rectangular slide bar; 634. Stud I; 64. Adjustment component II; 641. Cross slot; 642. Slide; 643. Stud II; 644. Threaded cylinder; 65. Adjustment knob; 66. Bellows; 67. Calibration auxiliary component; 671. Ring seat II; 672. Rectangular seat I; 673. Laser diode II; 674. Rectangular seat II; 675. Calibration slot; 7. Mounting base; 8. Reinforcing rib. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 This embodiment provides a technical solution: a fiber optic photoelectric sensor, including an optical fiber 1, a housing 2 at the lower end of the optical fiber 1, a photodetector 3 inside the housing 2, and a laser diode 4 at the upper end of the optical fiber 1. It also includes a control switch 5 located outside the optical fiber 1, with its input terminal electrically connected to an external power supply. Mounting seats 7 are located on the lower side of a rectangular frame 61 and the lower side of the housing 2, and each mounting seat 7 has reinforcing ribs 8 inside. When installing the fiber optic photoelectric sensor, the photodetector 3 and laser diode 4 are first installed in their corresponding positions using bolts through the mounting seats 7. The reinforcing ribs 8 provide auxiliary support to the internal frame of the mounting seats 7, thereby improving the overall structural strength of the mounting seat 7. At this time, the installation positions of the photodetector 3 and laser diode 4 should be... When horizontally aligned and in use, the fiber optic photoelectric sensor emits a light signal that illuminates the photodetector 3. When the surface material of the photodetector 3 is illuminated by the light, electrons in the material are excited, causing them to escape from the surface and form a current signal. These light signals are converted into electrical signals through photoelectric principles, thereby achieving the purpose of measurement and detection. At the same time, part of the light signal emitted by the laser diode 4 is transmitted to the photodetector 3 through the optical fiber 1. The photodetector 3 uses the principle of total internal reflection of light within the optical fiber 1 to acquire the changes in optical properties (such as intensity, wavelength, frequency, etc.) caused by changes in external measured parameters (such as temperature, pressure, etc.). The photodetector 3 combines these changes to ensure the accuracy of its measurement and detection purpose, and also includes a fine-tuning mechanism 6.

[0021] Fine-tuning mechanism 6 includes a rectangular frame 61, an annular seat 62, an adjustment component 63, an adjustment component 64, and a calibration auxiliary component 67. The rectangular frame 61 is located outside the laser diode 4. The annular seat 62 is located outside the laser diode 4. The adjustment component 63 and adjustment component 64 are respectively located between the annular seat 62 and the rectangular frame 61. The calibration auxiliary component 67 is located between the laser diode 4 and the outer casing 2. The adjustment component 63 includes a dovetail groove 631, a rectangular shell 632, a rectangular slide rod 633, and a stud 634. The dovetail groove 631 is formed on the front wall of the rectangular frame 61. The rectangular shell 632 is slidably connected inside the dovetail groove 631. The rectangular slide rod 633 is slidably connected to the rear end of the rectangular shell 632. The rear end of the slide rod 633 is fixedly connected to the outer side of the annular seat 62. A stud 634 is rotatably connected between the upper and lower walls of the rectangular frame 61 via a bearing. The stud 634 is threadedly connected to the front end of the rectangular shell 632. The adjusting assembly 64 includes a cross-shaped groove 641, a slide 642, a stud 643, and a threaded cylinder 644. The cross-shaped groove 641 is located on the rear wall of the rectangular frame 61. The slide 642 is slidably connected inside the cross-shaped groove 641. A stud 643 is rotatably connected to the middle of the slide 642 via a bearing. The front end of the stud 643 is threadedly connected to the threaded cylinder 644. The front end of the threaded cylinder 644 is fixedly connected to the outer side of the annular seat 62. The fine-tuning mechanism 6 also includes an adjusting knob 65 and a bellows 66. 65 is respectively set at the upper end of stud 1 634 and the rear end of stud 2 643. Bellows 66 are provided between the upper and lower walls of the rectangular frame 61 and between the adjacent rectangular shells 632 and between the threaded cylinder 644 and the slide block 642. The bellows 66 are movably sleeved on the outer ends of the adjacent stud 1 634 and stud 2 643. The calibration auxiliary component 67 includes an annular seat 2 671, a rectangular seat 1 672, a laser diode 2 673, a rectangular seat 2 674, and a calibration groove 675. The annular seat 2 671 is located outside the laser diode 1 4. Three evenly distributed rectangular seats 1 672 are provided outside the annular seat 2 671. A laser diode 2 673 is provided in the middle of each rectangular seat 1 672. The input end of each laser diode 2 673 is connected to the control switch. The output terminal of switch 5 is electrically connected. Three evenly distributed rectangular bases 674 are provided on the outer side of the outer casing 2. Each rectangular base 674 has a calibration slot 675 in its center. Laser diodes 673 are installed in conjunction with the calibration slots 675. Then, the photodetector 3 activates the laser diodes 673 to emit light signals. There are three sets of laser diodes 673. The operator observes the light signals emitted by the three sets of laser diodes 673. If the light signals from each set of laser diodes 673 illuminate the corresponding horizontal calibration slot 675, then by aligning the three points horizontally, it is determined that the photodetector 3 and the laser diodes 673 are in a horizontally aligned state. If the light signals emitted by the three sets of laser diodes 673 do not all illuminate the corresponding calibration slots 675...At this point, the photodetector 3 and the laser diode 4 are not horizontally aligned. The operator then rotates the upper adjustment knob 65, causing the stud 634 to rotate. During this rotation, the stud 634, through a threaded connection, causes the rectangular shell 632 to slide vertically along the dovetail groove 631. The rectangular shell 632, through a sliding engagement with the rectangular slide rod 633, causes the annular seat 62 to move vertically, driving the laser diode 4 (during this process, the annular seat 62, through the threaded cylinder 644 and the stud 643, allows the slide 642 to adaptively slide vertically along the cross groove 641). Simultaneously, the operator rotates the rear adjustment knob 65, causing the stud 643 to rotate. During this rotation, the stud 643, through its meshing connection with the threaded cylinder 644, causes the threaded cylinder 644 to move longitudinally, driving the laser diode 4 through the annular seat 62 (during this process...). The annular seat 62 drives the rectangular slide rod 633 to slide adaptively along the rectangular shell 632, thereby fine-tuning the installation position of the laser diode 4 relative to the installation position of the photodetector 3, ensuring the alignment between the two. The exposed parts of studs 643 and 634 are wrapped by a bellows 66 to prevent dust and other impurities from entering and interfering with the threaded drive. (The bellows 66 is a corrugated structure made of multiple layers of stacked metal sheets; its working principle is to achieve self-adaptive sealing through elastic deformation to maintain good sealing performance.) This device, through a detection element, can automatically detect the alignment of the light source and photodetector 3 installation positions within the device. If they are misaligned, the transmission element can make local fine-tuning of the light source installation point, allowing the light source and photodetector 3 to quickly align without requiring further disassembly and reassembly.

[0022] The working principle of the fiber optic photoelectric sensor provided by this utility model is as follows: During installation, the photodetector 3 and laser diode 4 are first installed in their corresponding positions using bolts on the mounting base 7. Reinforcing ribs 8 provide auxiliary support to the internal frame of the mounting base 7, thereby improving the overall structural strength of the mounting base 7. At this time, the installation positions of the photodetector 3 and laser diode 4 should be horizontally aligned. Then, the photodetector 3 activates the laser diode 673 to emit a light signal. There are three sets of laser diodes 673. The operator observes the light signals emitted by the three sets of laser diodes 673. If the light signal from each set of laser diodes 673 illuminates the horizontally corresponding calibration slot 675, the three-point horizontal alignment is achieved. If the photodetector 3 and laser diode 4 are horizontally aligned, and the light signals emitted by the three sets of laser diodes 673 fail to illuminate the corresponding calibration slots 675, then the photodetector 3 and laser diode 4 are not horizontally aligned. The operator then rotates the upper adjustment knob 65 to rotate the stud 634. During the rotation of the stud 634, the rectangular shell 632 slides vertically along the dovetail groove 631 via a threaded connection. The rectangular shell 632, through its sliding engagement with the rectangular slide rod 633, causes the annular seat 62 to move the laser diode 4 vertically. (During this process, the annular seat 62, through the threaded cylinder 644 and the stud 643, allows the slide block 642 to adaptively slide vertically along the cross groove 641.) Simultaneously, the operator rotates the adjustment knob 65 on the rear side, causing stud 643 to rotate. During the rotation of stud 643, the engagement between stud 643 and threaded cylinder 644 causes the threaded cylinder 644 to drive the laser diode 4 longitudinally via annular seat 62 (during this process, annular seat 62 drives rectangular slide rod 633 to slide adaptively along rectangular shell 632), thereby fine-tuning the installation position of laser diode 4 relative to the installation position of photodetector 3 to ensure alignment between the two. The exposed parts of stud 643 and stud 634 are wrapped by bellows 66 to prevent dust and other impurities from entering and interfering with the threaded transmission (bellows 66 is a corrugated structure made of multiple layers of metal sheets). Its working principle is to achieve adaptive sealing through elastic deformation to maintain good sealing performance. When the fiber optic photoelectric sensor is in use, the laser diode-4 emits a light signal that illuminates the photodetector 3. When the surface material of the photodetector 3 is illuminated by the light, it can excite electrons in the material, causing electrons to escape from the surface of the material, thereby forming a current signal. Through the photoelectric principle, these light signals are converted into electrical signals, thereby achieving the purpose of measurement and detection. At the same time, part of the light signal emitted by the laser diode-4 is transmitted to the photodetector 3 through the optical fiber 1. The photodetector 3 uses the principle of total internal reflection of light within the optical fiber 1 to obtain the changes in optical properties (such as intensity, wavelength, frequency, etc.) caused by changes in external measured parameters (such as temperature, pressure, etc.).The photodetector 3 incorporates these changes to ensure the accuracy of its measurement and detection objectives.

[0023] It is worth noting that the photodetector 3 disclosed in the above embodiments can be a PDA36A2, and both the laser diode 4 and the laser diode 673 can be 5mWLD infrared laser diodes. The control switch 5 is provided with a control button that corresponds to the laser diode 673 and is used to control its switch.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A fiber optic photoelectric sensor, comprising an optical fiber (1), a housing (2) at the lower end of the optical fiber (1), a photodetector (3) inside the housing (2), and a laser diode (4) at the upper end of the optical fiber (1), characterized in that: It also includes a fine-tuning mechanism (6); Fine-tuning mechanism (6): It includes a rectangular frame (61), an annular seat (62), an adjustment component (63), an adjustment component (64), and a calibration auxiliary component (67). The rectangular frame (61) is located outside the laser diode (4). The annular seat (62) is provided on the outside of the laser diode (4). The adjustment component (63) and the adjustment component (64) are respectively provided between the annular seat (62) and the rectangular frame (61). The calibration auxiliary component (67) is provided between the laser diode (4) and the outer shell (2).

2. The fiber optic photoelectric sensor according to claim 1, characterized in that: It also includes a control switch (5), which is located outside the optical fiber (1), and the input end of the control switch (5) is electrically connected to an external power supply.

3. The fiber optic photoelectric sensor according to claim 1, characterized in that: The adjustment component 1 (63) includes a dovetail groove (631), a rectangular shell (632), a rectangular slide rod (633), and a stud 1 (634). The dovetail groove (631) is opened on the front wall of the rectangular frame (61). The rectangular shell (632) is slidably connected inside the dovetail groove (631). The rectangular slide rod (633) is slidably connected to the rear end of the rectangular shell (632). The rear end of the rectangular slide rod (633) is fixedly connected to the outer side of the annular seat 1 (62). The stud 1 (634) is rotatably connected between the upper and lower walls of the rectangular frame (61) through a bearing 1. The stud 1 (634) is threadedly connected to the front end of the rectangular shell (632).

4. The fiber optic photoelectric sensor according to claim 3, characterized in that: The second adjustment component (64) includes a cross-shaped through groove (641), a slide (642), a stud (643), and a threaded cylinder (644). The cross-shaped through groove (641) is opened on the rear wall of the rectangular frame (61). The slide (642) is slidably connected inside the cross-shaped through groove (641). The stud (643) is rotatably connected to the middle part of the slide (642) through a bearing. The threaded cylinder (644) is threadedly connected to the front end of the stud (643). The front end of the threaded cylinder (644) is fixedly connected to the outer side of the annular seat (62).

5. The fiber optic photoelectric sensor according to claim 4, characterized in that: The fine-tuning mechanism (6) also includes an adjustment knob (65) and a bellows (66). The adjustment knob (65) is respectively located at the upper end of stud one (634) and the rear end of stud two (643). Bellows (66) are provided between the upper and lower walls of the rectangular frame (61) and the adjacent rectangular shell (632), as well as between the threaded cylinder (644) and the slide (642). The bellows (66) are respectively movably sleeved on the outer ends of the adjacent stud one (634) and stud two (643).

6. The fiber optic photoelectric sensor according to claim 2, characterized in that: The calibration auxiliary component (67) includes a ring seat 2 (671), a rectangular seat 1 (672), a laser diode 2 (673), a rectangular seat 2 (674), and a calibration slot (675). The ring seat 2 (671) is located outside the laser diode 1 (4). Three rectangular seats 1 (672) are evenly distributed outside the ring seat 2 (671). The center of each rectangular seat 1 (672) is provided with a laser diode 2 (673). The input end of each laser diode 2 (673) is electrically connected to the output end of the control switch (5). Three rectangular seats 2 (674) are evenly distributed outside the outer shell (2). The center of each rectangular seat 2 (674) is provided with a calibration slot (675). The laser diode 2 (673) is installed in conjunction with the calibration slot (675).

7. The fiber optic photoelectric sensor according to claim 1, characterized in that: The lower side of the rectangular frame (61) and the lower side of the outer shell (2) are provided with mounting bases (7), and the interior of the mounting bases (7) is provided with reinforcing ribs (8).

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