A passive conveyor safety protection system with a hot standby function

Abstract

The present invention provides a passive conveyor safety protection system with hot standby functionality. It comprises a positioning fiber optic mainframe, optical fibers, and a fiber optic protection device. The positioning fiber optic mainframe is equipped with two fiber optic channels, each containing an optical fiber. The two optical fibers are connected to fiber optic protection devices installed on either side of the conveyor, and the ends of the two fibers are fused together. When the fiber optic protection device alarms, the optical fibers are driven to bend and twist within the fiber optic protection device. Advantages of this system include: No fiber fusion splicing or plug connection is required between the fiber optic protection device and the optical fibers, and fiber laying and installation of the fiber optic protection device do not conflict with each other. Real-time fiber break detection is provided, with an immediate alarm signal output in the event of a fiber break. Furthermore, the hot standby function allows the system to continue operating even if one fiber is broken.

Description

Technical Field

[0001] The invention belongs to the technical field of conveyors and relates to a passive conveyor safety protection system with a hot standby function. Background Art

[0002] Belt conveyors, also known as rubber belt conveyors, are widely used in various industries such as home appliances, electronics, electrical appliances, machinery, tobacco, injection molding, post and telecommunications, printing, and food for assembly, testing, commissioning, packaging, and transportation of objects. Currently, the sensors used in the online monitoring system for the comprehensive protection status of belt conveyors are all electrical signal sensors, requiring address encoders, repeaters, signal terminals, and power supplies.

[0003] The existing patent CN112607361A fiber optic passive conveyor integrated protection system uses grating sensors. Due to the large scattering loss of the grating sensors in their initial state, one optical fiber can connect to approximately 8-15 grating sensors. In actual applications, multiple optical fiber segments need to be deployed for collection and a large amount of on-site optical fiber splicing work needs to be performed. The workload is huge and not conducive to subsequent replacement and maintenance. It is also impossible to detect fiber cable break accidents. In the fiber break state, all protections fail, posing a huge safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a passive conveyor safety protection system with a hot standby function.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a passive conveyor safety protection system with hot standby function, including a positioning fiber optic host, an optical fiber and a fiber optic protection device. The positioning fiber optic host is provided with two fiber optic channels, and an optical fiber is provided in each of the two fiber optic channels. The two optical fibers are respectively connected to the fiber optic protection devices installed on both sides of the conveyor, and the tail ends of the two optical fibers are fused; when the fiber optic protection device alarms, the optical fiber is driven to bend and twist inside the fiber optic protection device.

[0006] Furthermore, the optical fiber protection device includes a base, a slide rail, a fixed support column, a slider, an open silicone sheath, an action robot arm and a shell. A circle of raised side walls is provided on the front of the base, an opening is provided on one side of the raised side wall, and the open silicone sheath is fitted into the opening. A cavity is formed in the raised side wall, and a hollow slide rail is provided on the base in the cavity. A slider is provided on the hollow slide rail. The slider includes a column, a disk and a groove. The groove is provided at the upper end of the column, and the disk is provided in the middle of the column. The column between the groove and the disk is arranged in the hollow slide rail, and the column at the lower end of the disk is provided. The slide rail passes through the hollow part and is connected to the action robot arm and is driven by the action robot arm to move on the hollow slide rail. A fiber optic embedding groove is provided in the groove part and runs through the front and back. One side of the fiber optic embedding groove is the action support surface of the slider and the other side of the fiber optic embedding groove is the reset support surface of the slider. Fixed support columns are provided on both sides of the hollow slide rail, and the shell cover is provided on the raised side wall. The optical fiber enters the cavity through the line inlet on the open silicone sheath and passes through the space between the fixed support column and the raised side wall. The optical fiber is engaged in the fiber optic embedding groove and is driven by the slider to move along the hollow slide rail.

[0007] Furthermore, the optical fiber is ring-shaped in the cavity.

[0008] Furthermore, a hollow slide rail is provided on the base inside the cavity.

[0009] Furthermore, a plurality of hollow slide rails are provided on the base in the cavity, each hollow slide rail is equipped with a slider, and fixed support columns are provided on both sides of each hollow slide rail.

[0010] Furthermore, one optical fiber passes through multiple optical fiber protection devices.

[0011] Furthermore, the optical fiber is led out from the outlet of the open silicone sheath.

[0012] Furthermore, the positioning type fiber optic host is connected to an external display unit, which can exchange data with a third-party system through a communication interface; the positioning type fiber optic host is provided with an output control unit that outputs corresponding types of alarm actions.

[0013] Furthermore, the optical fiber protection device includes a base, a turntable, a fixed support column, an open silicone sheath, and an action robotic arm. A circle of raised side walls is provided on the front of the base, and open wire outlets are provided on both sides of the raised side walls. The open wire outlets are embedded with open silicone sheaths, and a cavity is formed in the raised side walls. The base in the cavity is provided with a turntable whose back passes through the base and is connected to the action robotic arm and is driven to rotate by the action robotic arm. There are two support columns on the turntable that can rotate with the turntable, and a fixed support column fixed to the base is provided on both sides of the turntable.

[0014] The beneficial effects of the present invention are: using a single-mode single fiber, alarm node information collection of up to 50 km and 50,000 nodes can be achieved; the fiber-optic protection device and the optical fiber do not require fiber fusion splicing or plug connection, and the optical fiber laying and the installation of the fiber-optic protection device do not conflict with each other; real-time fiber break detection, real-time output of an alarm signal when a fiber is broken; with a hot standby function, the system can continue to be used when one fiber is broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the invention.

[0016] Figure 2 It is a structural diagram of the optical fiber protection device of Example 1.

[0017] Figure 3 This is a schematic diagram of the working structure of the optical fiber protection device of Example 1.

[0018] Figure 4 It is a schematic diagram of the slider structure of Example 1.

[0019] Figure 5 It is a structural diagram of the optical fiber protection device of Example 2.

[0020] Figure 6 This is a schematic diagram of the working structure of the optical fiber protection device of embodiment 2

[0021] 1 is the base; 2 is the slide rail; 3 is the fixed support column; 4 is the slider; 5 is the open silicone sheath; 6 is the action robot arm; 7 is the optical fiber; 8 is the positioning optical fiber host; 9 is the optical fiber protection device; 10 is the display unit; 11 is the output control unit; 12 is the communication interface; 51 is the outlet of the open silicone sheath; 41 is the slider action support surface; 42 is the slider reset support surface; 43 is the groove; 44 is the disk body; 45 is the column; 71 is the optical fiber bending part; 101 is the support column; 104 is the turntable. DETAILED DESCRIPTION

[0022] The following is a combination of the embodiments of the present invention Figure 1-6 , the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Example 1 Reference Figure 1-4 A passive conveyor safety protection system with hot standby function includes a positioning fiber optic host 8, an optical fiber 7 and a fiber optic protection device 9. The positioning fiber optic host 8 is provided with two fiber optic channels, each of which is provided with an optical fiber 7. The two optical fibers 7 are respectively connected to the fiber optic protection devices 9 installed on both sides of the conveyor, and the tail ends of the two optical fibers are fused; when the fiber optic protection device 9 alarms, the optical fiber 7 is driven to bend and twist inside the fiber optic protection device 9.

[0024] A passive conveyor safety protection system with a hot standby function, wherein a cavity is provided on a fiber-optic protection device, openings are provided on both sides of the cavity wall, and an open silicone sheath is provided on the opening. The optical fiber enters the cavity through the line inlet on the open silicone sheath and is connected to the bending and torsion structure. When the fiber-optic protection device 9 alarms, the bending and torsion structure is driven by the action robot arm to bend and twist, thereby driving the optical fiber 7 to bend and twist inside the fiber-optic protection device 9.

[0025] A passive conveyor safety protection system with hot standby function, the fiber optic protection device includes a base 1, a slide rail 2, a fixed support column 3, a slider 4, an open silicone sheath 5, an action robot 6 and a shell, a circle of raised side walls are provided on the front of the base, an opening is provided on one side of the raised side wall, the open silicone sheath is fitted in the opening, a cavity is formed in the raised side wall, a hollow slide rail is provided on the base in the cavity, a slider 4 is provided on the hollow slide rail, the slider includes a column 45, a disk 44 and a groove 43, a groove is provided on the upper end of the column, and a disk is provided in the middle of the column; the column between the groove and the disk is provided in the hollow The column at the lower end of the disk body passes through the hollowed-out slide rail and is connected to the action robot arm and is driven by the action robot arm to move on the hollowed-out slide rail. A fiber optic fitting groove is provided in the groove portion, which runs through the front and back. One side of the fiber optic fitting groove is a slider action support surface 41, and the other side of the fiber optic fitting groove is a slider reset support surface 42. Fixed support columns are provided on both sides of the hollowed-out slide rail. The shell cover is provided on the raised side wall. The optical fiber enters the cavity through the line inlet on the open silicone sheath and passes through the space between the fixed support column and the raised side wall. The optical fiber is engaged in the fiber optic fitting groove and is driven by the slider to move along the hollowed-out slide rail. The optical fiber passes through the optical fiber protection device. When the optical fiber protection device does not alarm, the light in the optical fiber passes through the optical fiber protection device with extremely low loss. When the optical fiber protection device alarms, the internal mechanism bends and twists the optical fiber so that the light loss is greater than 2dB when passing through the optical fiber protection device.

[0026] A passive conveyor safety protection system with a hot standby function, wherein the optical fiber is arranged in a ring shape in a cavity.

[0027] A passive conveyor safety protection system with a hot standby function has a plurality of hollow slide rails on a base in a cavity, each hollow slide rail is equipped with a slider, and fixed support columns are provided on both sides of each hollow slide rail.

[0028] A passive conveyor safety protection system with a hot standby function, wherein an optical fiber passes through multiple optical fiber protection devices.

[0029] A passive conveyor safety protection system with a hot standby function, wherein an optical fiber is led out from an outlet 51 of an open silicone sheath.

[0030] A passive conveyor safety protection system with hot standby function. The propagation loss of light in optical fiber is mainly absorption loss and scattering loss. Different degrees of optical fiber bending can change the scattering loss. By accurately collecting the optical fiber scattering loss, specific events can be accurately identified. The propagation time of light particles in the optical fiber can be used to accurately scan the scattering loss at different positions along the entire optical fiber to obtain the required positioning information.

[0031] A passive conveyor safety protection system with hot standby function. The fiber optic protection device also includes a fiber optic pull rope switch, a fiber optic deviation switch, a fiber optic chute blockage detector, a fiber optic material flow detector, a fiber optic slip detector, a fiber optic tear detector, etc. It can monitor and output alarms in real time and accurately locate conveyor safety protection information such as conveyor pull rope alarm, deviation alarm, chute blockage alarm, material flow signal, speed slip alarm, longitudinal tear alarm, etc.

[0032] A passive conveyor safety protection system with a hot standby function. The fiber-optic protection device does not require on-site fiber fusion splicing and can quickly complete the installation and replacement of the fiber-optic deformation protection device.

[0033] A passive conveyor safety protection system with a hot standby function, wherein an optical fiber 7 can be wound as a whole without cutting and fixed in the cavity of a base 1 by an open silicone sheath 5, and the optical fiber 7 is led out from the outlet of the open silicone sheath.

[0034] A passive conveyor safety protection system with a hot standby function, wherein a slide rail 2 is arranged in a cavity of a base 1 at an angle of 0-180 degrees.

[0035] A passive conveyor safety protection system with a hot standby function. When the action robot arm 6 of the fiber-optic protection device is activated, the internal mechanical structure controls the slider 4 to make a linear displacement along the slide rail 2. The slider action support surface 41 pushes the optical fiber. At the same time, the optical fiber is resisted by the fixed support column 3, and the optical fiber bends at the optical fiber bend 71. The optical fiber scattering loss at this position increases.

[0036] A passive conveyor safety protection system with a hot standby function. When the fiber-optic protection device is reset, the internal mechanical structure controls the slider 4 to move to the initial position along the slide rail 2. The slider 42 resets the support surface to push the optical fiber back to the initial position, and the optical fiber bend 71 returns to its original state. The optical fiber scattering loss at this position also returns to its initial state.

[0037] A passive conveyor safety protection system with a hot standby function. When a fiber optic protection device requires multiple alarm signals, the optical fiber passes through multiple sliders in the fiber optic protection device.

[0038] A passive conveyor safety protection system with hot standby function, wherein the slider 4, the slide rail 2 and the fixed support column 3 in the optical fiber protection device are arranged in fixed positions as shown in FIG. Figure 2-3 As shown, when the optical fiber protection device is in the alarm state, the degree of optical fiber bending is close, and the optical fiber scattering loss value has good repeatability. In order to prevent the scattering loss from affecting the detection accuracy of the entire optical fiber, a scattering loss of 2dB is preferably used.

[0039] A passive conveyor safety protection system with hot standby function. The positioning fiber optic host sends a narrowband light wave each time through the optical fiber cable, receives the optical fiber reflected light wave signal at a fixed period, and after signal noise reduction and demodulation, the positioning fiber optic host automatically generates array signals for the entire optical fiber cable in intervals of about 1 meter. The array signal is the scattering loss of each interval. The scattering loss of the initial state of all fiber optic protection devices on the entire optical fiber and the scattering loss during alarm are calibrated to locate the installation position and alarm signal type of each fiber optic protection device. The positioning fiber optic host controls the output control unit to output the corresponding type of alarm action according to the alarm type. The external display unit can display the alarm position and alarm path. Data can be shared with a third-party system through the communication interface.

[0040] A passive conveyor safety protection system with hot standby functionality. The system starts timing with a narrowband lightwave emitted by a positioning fiber optic host and continues until no further lightwaves are received after a timeout. The total fiber length is calculated using the difference between the two times and the speed of light propagation in the fiber: total length = speed × time / 2. If the current total length does not match the calibrated length, a fiber break has occurred. The positioning fiber optic host then controls the output unit to generate the corresponding alarm action based on the alarm type.

[0041] A passive conveyor safety protection system with hot standby functionality features two independent fiber channels connecting two optical fibers. The two fiber ends are fused together to form a loop, enabling hot standby. If a fiber break occurs on one fiber, both channels become disconnected. The positioning fiber host immediately issues a fiber break alarm and displays the break location on an external display unit. The positioning fiber host automatically reallocates the number of device nodes between the two channels. By independently scanning both channels, it can still obtain operating information from all fiber protection devices, ensuring normal system operation.

[0042] A passive conveyor safety protection system with hot standby function collects and controls switch alarm information by detecting light loss caused by optical fiber bending and deformation.

[0043] Example 2 reference Figure 5-6A passive conveyor safety protection system with hot standby function includes a positioning optical fiber host 8, an optical fiber 7 and an optical fiber protection device 9. The positioning optical fiber host 8 is provided with two optical fiber channels, each of which is provided with an optical fiber 7. The two optical fibers 7 are respectively connected to the optical fiber protection devices 9 installed on both sides of the conveyor, and the tail ends of the two optical fibers are fused;

[0044] A passive conveyor safety protection system with a hot standby function, the fiber optic protection device includes a base 1, a turntable 104, a fixed support column 3, an open silicone sheath 5, and an action robot arm 6. A circle of raised side walls is provided on the front of the base, and open wire outlets are provided on both sides of the raised side walls. The open wire outlets are embedded with open silicone sheaths, and a cavity is formed in the raised side walls. The base in the cavity is provided with a turntable that is connected to the action robot arm through the back through the base and is driven to rotate by the action robot arm. There are two support columns 101 on the turntable that can rotate with the turntable, and a fixed support column fixed to the base is provided on both sides of the turntable.

[0045] A passive conveyor safety protection system with hot standby function, after the optical fiber enters the cavity, it passes through a fixed support column, a support column, another support column, and another fixed support column in sequence, such as Figure 5 and Figure 6 shown.

[0046] A passive conveyor safety protection system with a hot standby function. After entering a cavity, an optical fiber passes through the gap between a fixed support column and another support column, and the gap between another support column and another fixed support column.

[0047] A passive conveyor safety protection system with hot standby function, the turntable is connected to the action robot arm through a mechanical structure and is driven by the action robot arm to rotate according to a certain stroke and restore to zero position, thereby realizing the bending, twisting and resetting of the optical fiber.

[0048] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A passive conveyor safety protection system with hot standby function, comprising a positioning optical fiber host (8), an optical fiber (7) and an optical fiber protection device (9), characterized in that: The positioning optical fiber host (8) is provided with two optical fiber channels, each of which is provided with an optical fiber (7). The two optical fibers (7) are respectively connected to optical fiber protection devices (9) installed on both sides of the conveyor, and the tail ends of the two optical fibers (7) are fused; when the optical fiber protection device (9) alarms, the optical fiber (7) is driven to bend and twist inside the optical fiber protection device (9); The optical fiber protection device (9) comprises a base (1), a slide rail (2), a fixed support column (3), a slider (4), an open silicone sheath (5), an action robot arm (6) and a shell. The front of the base (1) is provided with a circle of raised side walls, one side of the raised side wall is provided with an opening, the opening is fitted with the open silicone sheath (5), a cavity is formed in the raised side wall, a hollowed-out slide rail (2) is provided on the base in the cavity, a slider (4) is provided on the hollowed-out slide rail (2), and the slider comprises a column (45), a disk (44) and a groove (43), the upper end of the column (45) is provided with the groove (43), the middle section of the column (45) is provided with the disk (44); the column between the groove (43) and the disk (44) is provided in the hollowed-out cavity. The column at the lower end of the disk body (44) passes through the hollow slide rail (2) and is connected to the action robot arm (6) and is driven by the action robot arm to move on the hollow slide rail (2). A fiber optic embedding groove that passes through the front and back is provided in the groove portion. One side of the fiber optic embedding groove is a slider action support surface (41), and the other side of the fiber optic embedding groove is a slider reset support surface (42). Fixed support columns (3) are provided on both sides of the hollow slide rail (2). The shell cover is provided on the raised side wall. The optical fiber (7) enters the cavity through the line inlet on the open silicone sheath and passes through the space between the fixed support column and the raised side wall. The optical fiber (7) is engaged in the fiber optic embedding groove and is driven by the slider (4) to move along the hollow slide rail (2); A plurality of hollowed-out slide rails (2) are provided on the base in the cavity, each hollowed-out slide rail (2) is equipped with a sliding block (4), and fixed support columns (3) are provided on both sides of each hollowed-out slide rail (2).

2. A passive conveyor safety protection system with hot standby function according to claim 1, characterized in that: The optical fiber (7) is in a ring shape in the cavity.

3. The passive conveyor safety protection system with hot standby function according to claim 1 is characterized in that: An optical fiber (7) passes through a plurality of optical fiber protection devices (9).

4. The passive conveyor safety protection system with hot standby function according to claim 2, characterized in that: The optical fiber (7) is led out from the outlet (51) of the open silicone sheath.

5. The passive conveyor safety protection system with hot standby function according to claim 1 is characterized in that: The positioning type optical fiber host (8) is externally connected to a display unit (10) and can exchange data with a third-party system via a communication interface (12); the positioning type optical fiber host is provided with an output control unit (11) for outputting corresponding type alarm actions.

6. A passive conveyor safety protection system with hot standby function, comprising a positioning optical fiber host (8), an optical fiber (7) and an optical fiber protection device (9), characterized in that: The positioning optical fiber host (8) is provided with two optical fiber channels, each of which is provided with an optical fiber (7). The two optical fibers (7) are respectively connected to optical fiber protection devices (9) installed on both sides of the conveyor, and the tail ends of the two optical fibers (7) are fused; when the optical fiber protection device (9) alarms, the optical fiber (7) is driven to bend and twist inside the optical fiber protection device (9); The optical fiber protection device (9) comprises a base (1), a turntable (104), a fixed support column (3), an open silicone sheath (5), and an action mechanical arm (6). The front of the base is provided with a circle of raised side walls, and open wire outlets are provided on both sides of the raised side walls. The open silicone sheaths are embedded in the open wire outlets. A cavity is formed in the raised side walls. The base in the cavity is provided with a turntable whose back passes through the base and is connected to the action mechanical arm and is driven to rotate by the action mechanical arm. The turntable is provided with two support columns (101) that can rotate with the turntable. A fixed support column fixed to the base is provided on the outside of each side of the turntable.

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