Optical fiber identification structure for Christmas tree PVC (polyvinyl chloride) loose strip cutting

Abstract

The optical fiber identification structure for cutting the PVC loose strips of the Christmas tree comprises a motor control mechanism, a cutting mechanism and a chuck mechanism which are arranged on a body rack, and is characterized in that an optical fiber amplifier, an optical fiber transmitter and an optical fiber receiver are arranged on an optical fiber identification guide of the cutting mechanism. And the optical fiber amplifier is arranged on the rack bedplate and is electrically connected with the electromechanical control mechanism, and the optical fiber amplifier is electrically connected with the optical fiber transmitter and the optical fiber receiver which are arranged on the optical fiber seat. The automatic optical fiber cutting machine has the advantages that optical fibers can be automatically identified and accurately positioned, all leaf shapes can be cut, iron wires can not be cut into leaf threads, cutters do not need to be replaced, one machine is universal, the product quality is improved, the labor cost is reduced, the production cost is saved for enterprises, and the maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to an automatic identification machine for cutting pine strips, in particular to an optical fiber identification structure for cutting PVC pine strips of Christmas trees. Background Art

[0002] At present, the production of PVC pine strips mainly uses the blade of the slats. When cutting V leaves, the upper blade is often replaced with a special blade with a width of only two to three millimeters, the leaves are pulled out by hand, and then the length size is positioned by the mold. Cut from top to bottom. In this way, the purpose of cutting the wire but not the leather is achieved. However, because the PVC leaves are divergent in all directions, the knife distributed 360 degrees around the garden will cut off some of the leaves if it is too wide; if the knife is too narrow, sometimes the wire cannot be cut and slips off. No matter how wide the knife is, it will cut the leaves to some extent, but the cut leaves are a little incomplete and not perfect.

[0003] When the existing bottom knife and surface knife for cutting PVC leaves cut the leaves, the leaves coming out from the material guide inlet to the cutting and feeding hole are misaligned with the cutter, so the leaves will be cut off together with the iron wire and the leaf wire when cutting, so the leaves are imperfect and the product quality is worrying. For example, Chinese Patent No. 202211370937.9, entitled "A Cutting and Shaping Device for Simulated Pine Needles", discloses a cutting and shaping device for simulated pine needles, including a conveying mechanism, a cutting mechanism, a shaping mechanism and a discharging mechanism arranged in sequence, the shaping mechanism includes a turntable assembly, a pine needle shaping cylinder is provided on the turntable assembly, and an electromagnetic heating assembly is provided on the pine needle shaping cylinder. The conveying mechanism sends the simulated pine needle pine strips into the cutting mechanism for cutting, and then enters the shaping mechanism, and is shaped under the heating of the electromagnetic heating assembly, and then discharged from the discharging mechanism, but still fails to achieve the technical problem of cutting leaves without damaging the leaves. If a machine is developed to automatically identify and detect the cutting of PVC pine strips for Christmas trees, it can solve the difficult problems caused by the backward technology of current equipment.

[0004] Based on the defects of the above-mentioned technology, it is necessary to innovate and develop a precise leaf cutting machine, which can set the leaf cutting mode by the machine interface and switch the leaf cutting gear by manual button, so as to achieve safety and efficiency, produce very beautiful Christmas tree pine strips, and solve the technical problem of low yield rate. Summary of the invention

[0005] The purpose of the utility model is to innovate and develop a fiber optic recognition structure for cutting PVC pine strips of a Christmas tree. When cutting pine strips, it can automatically identify and only cut the iron wire of the pine strips without damaging the leaf wires, thereby improving product quality. The three modes of stamped leaves, false garden leaves and V leaves can be selected by manual switch or automatic switch.

[0006] A fiber optic identification structure for cutting PVC Christmas tree strips is implemented, including a motor control mechanism, a cutting mechanism and a chuck mechanism on a main body frame, characterized in that the fiber optic identification guide of the cutting mechanism is provided with a fiber optic amplifier, a fiber optic transmitter and a fiber optic receiver; the fiber optic amplifier of the fiber optic identification structure is arranged on a table and locked with a buckle cover, and the fiber optic amplifier is electrically connected to the fiber optic transmitter and the fiber optic receiver and then arranged correspondingly on both sides of the fiber optic seat.

[0007] The optical fiber amplifier is arranged on the frame plate and is electrically connected to the electromechanical control mechanism, and the optical fiber amplifier is electrically connected to the optical fiber transmitter and the optical fiber receiver arranged on the optical fiber seat.

[0008] The optical fiber transmitter is provided with a lamp bead for emitting a light source, and the lamp bead emits red light that hits the gear position of the optical fiber receiver.

[0009] The optical fiber seat is provided with a small circular hole for passing materials. When a loose strip is inserted into the small circular hole, the red light emitted by the optical fiber transmitter will generate a pulse mutation signal for the loose strip from nothing to something. The crane will move forward to its position, and then the chuck will clamp the loose strip and extend it from the small circular hole and pull it backward. In the process of the loose strip moving backward with the movement of the crane, light leakage occurs at the position where there is a stamping notch and is detected by the optical fiber sensing switch. The optical fiber amplifier will output an interrupt signal to the motor control mechanism, and the motor control mechanism will perform an interrupt positioning according to the prompt of the interrupt signal, and then control the cutter to cut the loose strip at the accurate position and stop automatically, thus achieving the effect of automatic optical fiber recognition.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] First, the optical fiber can automatically identify and precisely locate with an accuracy of 0.1mm, and can cut out all leaf shapes without changing the tool, achieving a one-machine-universal technical effect.

[0012] Second, the machine of the utility model has three leaf cutting switch gear switching modes, namely, stamping leaf, false round head and V leaf, which can be set in the operation panel or switched by buttons, which is very convenient for automatic or manual operation. The leaf cutting quantity and length positioning can be set as needed to ensure that only iron wire can be cut and leaf silk will not be cut.

[0013] Third, it reduces waste for manufacturing companies, improves the yield rate, saves production costs for companies, and solves the technical difficulties that previously resulted from low yield rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the optical fiber identification structure cut from a Christmas tree PVC pine strip of the utility model;

[0015] Figure 2This is a schematic diagram of a fiber optic identification structure cut from a Christmas tree PVC pine strip according to the utility model, and also includes Figure 2-1 to Figure 2-2 ;

[0016] Figure 2-1 The front view of the working state after the door 102 of the rack 1 is opened and the cover is uncovered;

[0017] Figure 2-2 It is a structural diagram of the back of rack 1;

[0018] Figure 3 A schematic cross-sectional view of an optical fiber identification structure cut from a Christmas tree PVC pine strip according to the utility model;

[0019] Figure 4-1 to Figure 4-4 This is a schematic diagram of the optical fiber identification structure of a Christmas tree PVC pine strip cut from the utility model;

[0020] Figure 5 A schematic diagram of a chuck of an optical fiber identification structure cut from a Christmas tree PVC pine strip according to the utility model;

[0021] Figure 6 This is a schematic diagram of the optical fiber identification structure of a Christmas tree PVC pine strip cut by the utility model, and also includes Figure 6-1 ;

[0022] Figure 6-1 , is a schematic diagram of the structure of the optical fiber identification component;

[0023] Figure 7 A cutting state diagram of an optical fiber identification structure for cutting a Christmas tree PVC pine strip according to the utility model;

[0024] Figure 8 This is a schematic diagram of the pine strip structure of the optical fiber identification structure cut from a Christmas tree PVC pine strip of the utility model.

[0025] Description of the attached figure

[0026] 1. Frame, 101. Foot, 102. Door, 103. Table.

[0027] 2. Motor control mechanism

[0028] 21. Rear power distribution box, 211. Air switch, 212. Contactor, 213. PLC power information control module, 214. Switching power supply, 215. Servo motor drive module;

[0029] 22. Front electrical distribution box, 221. Feeding solenoid valve, 222. Pressure regulator, 223. Cutter solenoid valve, 224. Pressing solenoid valve;

[0030] 23. Air storage cylinder, 24. Cooling fan.

[0031] 3. Cutting mechanism

[0032] 31. Fiber identification component, 310. Buckle cover, 311. Fiber amplifier, 312. Fiber holder, 3121. Small round hole, 3122. Screw hole, 313. Fiber transmitter, 3131. Light source lamp bead, 3132. Screw hole, 3133. Power cord, 3134. Adjustment screw slot, 314. Fiber receiver, 3141. Power cord, 3142. Screw hole, 3143. Adjustment screw slot, 3144. Gear, 315. Material guide barrel, 3151. Inlet, 316. Screw;

[0033] 32. material guide assembly, 321. cylinder seat, 322. cylinder, 323. material guide seat, 324. buckle cover, 3241. screw, 325. bell mouth, 3251. inlet, 326. rear punch rubber pad;

[0034] 33. Pressing assembly, 331. Guide rail, 332. Slider, 333. Cylinder connecting seat, 334. Cylinder, 335. Bell mouth, 3351. Inlet, 336. Bell mouth seat, 337. Buckle cover, 338. Front buffer rubber pad; 339. Screw.

[0035] 34, hanger, 341, hole, 342, screw hole, 343, screw hole;

[0036] 35, cutter assembly, 350, face knife holder; 351, bottom knife seat, 3511, rubber sleeve hole, 3512, screw hole, 3513, rubber sleeve, 3513A, rubber sleeve hole, 3514, screw hole; 352, bottom knife, 3521, material hole, 3522, screw hole; 353, notch gasket, 3531, screw hole, 3532, slide groove; 354, knife holder pressure plate, 3541, screw hole; 355 , noodle knife, 3551, fixing position, 3552, screw hole, 3553, screw hole, 3554, step groove, 3555, blade groove; 356, small square knife, 3561, hole, 3562, V groove, 3563, tapered nut, 3560, hole; 357, gasket, 3571, screw hole; 358, noodle knife back plate, 3581, center screw hole, 3582, screw hole; 359, screw;

[0037] 36. Switch button, 361. Power switch, 362. Power light, 363. Emergency stop, 364. Automatic and manual buttons, 365. Leaf button;

[0038] 37. Operation panel;

[0039] 38. Cut and install the cylinder, 380. Cylinder, 381. Lower base plate, 3811. Upper base plate pad, 382. Buffering rubber, 383. Column, 384. Stud, 385. Equal height sleeve, 386. Connecting column, 387. Buffering top plate, 388. Fisheye joint, 389. Reinforcement buckle.

[0040] 4. Chuck assembly

[0041] 41. Servo motor;

[0042] 42. Guide rails;

[0043] 43, traveling, 431, slider, 4311, groove, 4312, screw hole, 432, connecting plate, 4321, screw hole, 433, connecting piece, 4331, screw hole;

[0044] 44, induction switch, 441, rear position induction switch, 442, middle position induction switch, 443, front position induction switch;

[0045] 45, belt seat, 450, screw hole, 451, synchronous wheel, 452, synchronous belt;

[0046] 46, tank chain, 461, upper connecting piece, 462, lower connecting piece, 463, screw hole;

[0047] 47. Cylinder pipe;

[0048] 48, chuck, 481, solenoid valve, 4811, 4812, air nozzle, 48A, screw hole, 48B, top frame screw hole.

[0049] 49. Screws.

[0050] 5. Pine sticks, 501. Pressed leaves, 502. Pseudo-garden leaves, 503. V leaves. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0052] See also Figure 1 , Figure 2 and Figure 6 , a fiber recognition structure for cutting PVC Christmas tree pine strips is implemented, including a motor control mechanism 2, a cutting mechanism 3 and a clamping mechanism 4 on a main frame 1, and a fiber recognition 31 of the cutting mechanism 3 is provided with a fiber amplifier 311, a fiber transmitter 313 and a fiber receiver 314. The fiber amplifier 311 of the fiber recognition structure 31 is arranged on the table 103 and locked with a buckle cover 310, and the fiber amplifier 311 is electrically connected to the fiber transmitter 313 and the fiber receiver 314 and then arranged on both sides of the fiber seat 312.

[0053] The optical fiber amplifier 313 is arranged on the platform 103 of the frame 1 and is electrically connected to the motor control mechanism 2, and the optical fiber amplifier 311 is electrically connected to the optical fiber transmitter 313 and the optical fiber receiver 314 arranged on the optical fiber seat 312. The optical fiber transmitter 313 is provided with a light source lamp bead 3131 for emitting light source, and the lamp bead 3131 emits red light that hits the gear 3144 of the optical fiber receiver 314. The optical fiber seat 312 is provided with a small round hole 3121 for passing the material. When the loose strip 5 is inserted from the small round hole 3121, the red light emitted by the optical fiber transmitter 313 will change the pulse mutation signal of the loose strip 5 from nothing to something, the driving vehicle will move forward to the position, and then the clamp 48 will clamp the loose strip 5 and stretch it out from the small round hole 3121 and pull it back. During the process of the loose strip 5 moving backward with the driving vehicle, the position with the punching notch will leak light and be detected by the optical fiber induction switch, and the optical fiber amplifier 311 will output an interrupt signal to the motor control mechanism 2, and the motor control mechanism 2 will perform an interrupt positioning according to the prompt of the interrupt signal, and then control the cutter 35 to cut the loose strip 5 at the accurate position and stop automatically, which achieves the effect of automatic optical fiber recognition. In addition, the rack 1 is provided with cooling fans 24 at both ends of the rear electrical distribution box 21.

[0054] See also Figure 2 , Figure 2 Also includes Figure 2-1 and Figure 2-2 , showing the planar structure of the cutting machine, Figure 2 This is the front view of the cutting machine. The lower part of the frame is equipped with the front power distribution box 22 and the rear power distribution box 21 of the electromechanical control mechanism 2 on the foot 101. Only the front power distribution box 22 can be seen when the door 102 is closed. The upper part shows the display of the optical fiber identification 31 of the table 103, the tank chain 46 of the material guide 32, the material press 33, the crane 43 chuck 48, the operation panel 37 and the four switch buttons 36. The switch buttons 36 include the power switch 361, the power light 362, the emergency stop 363, the automatic and manual buttons 364 and the leaf button 365. Figure 2-1 The front view of the machine frame 1 after the door 102 is opened and the cover is uncovered shows the connection relationship between the gas storage cylinder 23, the feeding electromagnetic valve 221, the pressure regulating meter 222, the cutter electromagnetic valve 223, the pressing electromagnetic valve 224 and the cutting and loading cylinder 380 and other structures provided in the front electrical distribution box; Figure 2-2It is a structural diagram of the back of the frame 1, showing that the rear electrical distribution box 21 is equipped with an air switch 211, a contactor 212, a PLC power information control module 213, a switching power supply 214, a servo motor drive module 215, a cutter assembly 35, a servo motor 41 and a tank chain 46. The menu set by the operation panel 37 can switch the required leaf cutting parameters. For example, the horizontal menu is set from left to right: reset, the 8th tube to the 1st tube, and the left side of the vertical row is set: positioning size, garden leaf length, leaf falling position, return length, leaf cutting count, the bottom is set with parameter settings, total production count table, inch length setting, switch detection, and the middle is the display number area after setting parameters.

[0055] See also Figure 3 , which is a schematic diagram of the sectional structure of the cutting mechanism of the utility model, a modified cylinder 38 is set from the base 101 of the frame 1 to connect the cutter assembly 35, and then the cutter assembly 35 is connected to the optical fiber identification assembly 31 and the hanger 34, and then to the connection between the pressing material 33 and the guiding material assembly 32, forming a linear channel for cutting leaf water. Figure 2 and Figure 3 The structure shows that the frame 1 platen 103 is provided with up to 4 groups of cutting mechanisms, and each of them is an independently working mechanism for pressing, feeding, pulling and cutting. At least one group of cutting mechanisms can be provided as needed, and a multi-layer switching interface can be provided in conjunction with the operation panel 37 to set the parameters required for cutting the loose strips. Therefore, the setting of the loose strip cutting mechanism of the utility model can be represented by 1+N, which means that according to the needs of the utility model, the cutting mechanism 3 is arranged in at least one group, and the cutting mechanism has no upper limit and is set according to the needs. Figure 3The cross-sectional view shows that the rack 1 table 103 and the front electric distribution box 22 partition are connected and locked with studs 384, and a lower bottom plate 381 is set on the partition. After the cylinder 380 is fixed with the lower bottom plate 381, the four columns 383 of the cylinder 380 are buckled on the buffer top plate 387, and the columns 386 led out from the buffer garden rubber 382 are sleeved with the fisheye joint 388 and the reinforcing buckle 389, and the face knife holder 350 is locked with the screw 359, and the face knife holder 350 corresponds to the face knife 355 screw hole 3553 and is locked with the screw 359. Then, the bottom knife seat 351 is correspondingly sleeved with the bottom knife 352, the notch gasket 353 and the knife holder pressing plate 354 are fixed to the table 105 with the screw 359 to form a vertical slide 3532 for buckling the face knife 355. After the face knife 355 is sleeved with the small square knife 356, the corresponding gasket 357 and the face knife back plate 358 are locked with screws 359, and the bottom knife 352 is inserted into the slide groove 3532 and the reinforcing buckle 389 is locked with screws 359. Then the optical fiber seat 312 is riveted to the bottom knife seat 351 with screws 359, and then the optical fiber amplifier 311 is set on the table 105 and locked with the buckle cover 310, and the optical fiber transmitter 313 and the optical fiber receiver 314 are electrically connected from the optical fiber amplifier 311 and then set correspondingly on the optical fiber seat 312. Then the hanger 34 is sleeved with the guide tube 315 and locked with screws 316 corresponding to the screw hole 3514 of the bottom knife seat 351, and then the hanger 34 is locked with screws 316 corresponding to the bottom knife seat 351. Next, the slider 332 is buckled on the guide rail 331 and fixed to the table 105, and the cylinder 334 is placed on the cylinder connection seat 333 and locked on the table 105. A bell mouth seat 336 is set on the cylinder 334 and the bell mouth 335 is sleeved on the buckle cover 337 and locked with screws 339. Finally, the cylinder seat 322 of the material guide and the cylinder 323 are correspondingly set on the table 105, and then the bell mouth 325 is set on the material guide seat 323 and the buckle cover 324 is covered and locked with screws 3241.

[0056] See also Figure 4-1 to Figure 4-4 , Figure 4-1 This is a schematic diagram of the cutter assembly. Figure 4-2 A side view of a bottom knife seat 351 stacked with a bottom knife 352, a notch gasket 353 and a knife holder pressing plate 354, and a rubber sleeve locked with screws 359 to form a through hole 3521 and a sliding groove 3532 for a face knife; Figure 4-3 It is a schematic diagram of the assembly and decomposition structure between the noodle knife, small square knife, noodle knife back plate, etc., after the fixed position 3551 of the noodle knife 355 is buckled into the V-groove 3562 of the small square knife 356, and the conical nut 3563 is sleeved into the hole 3561 of the small square knife 356, the gasket 357 and the noodle knife back plate 358 are locked with screws corresponding to the screw holes 3552 and 3582 of the noodle knife 355, among which the conical nut 3563 hole 3560 of the small square knife 356 corresponds to the screw hole 3581 of the noodle knife back plate 358 and is locked with screws 359 to form an integral noodle knife. Figure 4-4It is divided into A, B and C; among them, A and B are the surface knife 355 sleeved with the small square knife 356, the conical nut 3563 and the stacked gasket 357 and the surface knife back plate 358 locked with screws, B forms a notch of the blade groove 3555 after being fixed to the small square knife 356, which plays a role in accurately cutting the iron wire on the loose strip 5 without damaging the leaf wire, and C is the bottom knife seat 351 stacked with the bottom knife 352, the notch gasket 353 and the knife holder pressure plate 354 locked with screws 359 to show the side view of the bottom knife seat 351, the bottom knife 352, the rubber sleeve 3513, the fixing position 3551, the gasket 357 and the surface knife back plate 358 locked with screws 359.

[0057] See also Figure 5 , which is a schematic diagram of the structure of the chuck assembly of the utility model, a servo motor 41 is arranged on the top frame partition to connect the guide rail 42 and the induction switch 44, and then a travel 43 is arranged on the slider 431, and a belt seat 45 and a synchronous wheel 451 are arranged at one end of the guide rail 42 to lock the corresponding screw holes 450 with screws 49, and then the solenoid valve 481 is arranged on the top frame 1031 to lock the corresponding screw holes 48A and 48B with screws 49, and then the cylinder pipe 47 is inserted into the bottom of the partition 1032 and connected to the bottom of the partition 1032. The chuck 48 is sleeved, and the synchronous belt 452 is set on the synchronous wheel 451 under the partition 1032, and then the screw holes of the connecting piece 461 on the tank chain 46 are set corresponding to the partition 1032 and locked with screws 49, and the connecting piece 462 and the screw holes under the tank chain 46 are locked with the chuck 48 corresponding to the screw holes, and then one end of the cylinder tube 47 is connected to the chuck 48 air nozzle 4812 and then passed through the tank chain 46 and sleeved with the air nozzle 4811 of the solenoid valve 481.

[0058] See also Figure 6 , also includes Figure 6-1 , is a schematic diagram of the structure of the optical fiber identification component. The optical fiber identification component has an automatic optical fiber identification function. An optical fiber transmitter 313 and an optical fiber receiver 314 are arranged on both sides of the optical fiber seat 312 and locked with screws 316. The optical fiber seat 312 has a small round hole 3121 and a screw hole 3122 in the middle; the hanger 34 has a trumpet mouth hole 341 and two screw holes 342 and 343, and the guide cylinder 315 has a trumpet-shaped entrance 3151. The trumpet entrance 3151 at one end of the guide cylinder 315 corresponds to the hole 341 of the hanger 34, and the other end corresponds to the small round hole 3121 of the optical fiber seat 312. The optical fiber transmitter has a light source lamp bead 3131, a screw hole 3132, a power cord 3133 and an adjustment screw slot 3134; the optical fiber receiver 314 has a power cord 3141, a screw hole 3142 and an adjustment screw slot 3143.

[0059] See also Figure 7 It is a cross-sectional view structure of the utility model machine forming a channel in the cutting working state; Figure 8 The pine strips are three leaf structures of PVC pine strips, and the pine strips 5 include stamped leaves 501, pseudo-garden leaves 502 and V leaves 503. Figure 7 The schematic diagram of the structure of the PVC leaf in the working state of the machine cutting the leaf is shown by taking the V leaf 503 as an example. Figure 7 The side view shows that the cylinder 380 is connected to the surface knife holder 350 and passes through the table 105. The material guide cylinder 322 is connected to the material guide bell mouth 325, and the V-leaf 503 is inserted into the inlet 3251 of the bell mouth 325 and enters the inlet 3351 of the pressure bell mouth 335, and continues to pass through the pressure bell mouth and insert it into the inlet 3151 of the material guide cylinder 315 of the hanger 34, and then passes through the blade groove 3555 formed by the small square knife 356 of the cutter 35 and the surface knife 355 and is clamped by the chuck 48 to form a leaf cutting channel of the assembly line.

[0060] The utility model can cut leaves accurately without damaging the leaves, has a simple structure, reduces manual operations, saves costs for production enterprises, and can provide intelligent production equipment replacement and upgrading for enterprises producing artificial Christmas trees, so that it can be promoted and used on a large scale in industrialization.

[0061] The above is only the technical solution of the present invention. Although the present invention has been described in detail through the above embodiments, those skilled in the art should understand that various modifications can be made in form and detail without departing from the scope defined by the claims of the present invention and also within the scope of protection.

Claims

1. A fiber identification structure for cutting Christmas tree PVC pine strips, comprising a motor control mechanism, a cutting mechanism and a clamping mechanism arranged on a main body frame, characterized in that The cut optical fiber identification structure is provided with an optical fiber amplifier, an optical fiber transmitter and an optical fiber receiver; The optical fiber amplifier of the optical fiber identification structure is arranged on the table and locked with a buckle cover, and the optical fiber amplifier is electrically connected to the optical fiber transmitter and the optical fiber receiver and then arranged correspondingly on both sides of the optical fiber seat.

2. The optical fiber identification structure for cutting Christmas tree PVC pine strips as claimed in claim 1, characterized in that The optical fiber amplifier is arranged on the frame plate and is electrically connected to the electromechanical control mechanism, and the optical fiber amplifier is electrically connected to the optical fiber transmitter and the optical fiber receiver arranged on the optical fiber seat.

3. The optical fiber identification structure for cutting Christmas tree PVC pine strips as claimed in claim 2, characterized in that The optical fiber transmitter is provided with a lamp bead for emitting a light source, and the lamp bead emits red light that hits the gear position of the optical fiber receiver.

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