CN113112766A - Optical fiber intelligent early warning system - Google Patents
Optical fiber intelligent early warning system Download PDFInfo
- Publication number
- CN113112766A CN113112766A CN202110368755.7A CN202110368755A CN113112766A CN 113112766 A CN113112766 A CN 113112766A CN 202110368755 A CN202110368755 A CN 202110368755A CN 113112766 A CN113112766 A CN 113112766A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- strain
- early warning
- box
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 305
- 230000002159 abnormal effect Effects 0.000 claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 103
- 239000000835 fiber Substances 0.000 claims description 68
- 230000008859 change Effects 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Optical Transform (AREA)
- Emergency Alarm Devices (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention provides an optical fiber intelligent early warning system, belongs to the technical field of railway safety monitoring, and particularly relates to an optical fiber intelligent early warning system. The invention provides an optical fiber intelligent early warning system which comprises a vibration early warning unit, a temperature early warning unit, a strain early warning unit and intelligent early warning equipment, wherein the vibration early warning unit, the temperature early warning unit, the strain early warning unit and the intelligent early warning equipment can monitor railway abnormal conditions, the three early warning units can run simultaneously or independently, an optical fiber and a sensor can transmit abnormal signals and signals, the abnormal signals are analyzed, the abnormal vibration, rockfall, fire and rail conditions along the railway can be timely and early warned, a sensor protection component is arranged outside the optical fiber sensor, an optical fiber support is arranged in the optical fiber laying process, and the use reliability and stability of the device are. The optical fiber intelligent early warning system provided by the invention is simple and easy to use, can be used for monitoring the railway condition in real time, and early warning the abnormal condition, thereby improving the safety of railway use.
Description
Technical Field
The invention belongs to the technical field of railway safety monitoring, and particularly relates to an optical fiber intelligent early warning system.
Background
In recent years, the railway infrastructure of China is in a high-speed development stage, higher requirements are provided for the safety and the stability of the railway in the running process, once an accident occurs, the railway running can be greatly influenced, the life and property safety of people can be directly threatened, the self condition of the railway and the peripheral condition of the railway need to be monitored, early warning is timely carried out, abnormal conditions are timely processed, higher requirements are provided for automatic monitoring and early warning of the railway condition, conventional manual inspection cannot meet the detection requirement, meanwhile, the condition of incomplete detection exists, the railway condition cannot be comprehensively obtained, and the timely early warning cannot be carried out on the emergency condition.
Disclosure of Invention
The invention aims to provide an optical fiber intelligent early warning system, aiming at solving the problems of large detection requirement, incomplete detection and untimely early warning.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is an optical fiber intelligent early warning system, comprising: the system comprises a vibration early warning unit capable of monitoring abnormal vibration of the railway, a temperature early warning unit capable of monitoring temperature change of the railway, a strain early warning unit capable of monitoring strain condition of a rail and intelligent early warning equipment, wherein the vibration early warning unit, the temperature early warning unit and the strain early warning unit are parallel operation units, can be operated independently and can be operated simultaneously;
the vibration early warning unit comprises a first light source, a vibration detection optical fiber arranged along the railway and used for transmitting a light source signal, a vibration sensor arranged on the vibration detection optical fiber, a vibration optical fiber detector connected to one end of the vibration detection optical fiber and used for adjusting and restoring a returned light source signal, and a vibration alarm module connected to one side of the vibration optical fiber detector and used for early warning of abnormal conditions;
the temperature early warning unit comprises a second light source, a temperature detection optical fiber arranged along the railway and used for transmitting a light source signal, a temperature sensor arranged on the temperature detection optical fiber, a temperature optical fiber detector connected to one end of the temperature detection optical fiber and used for adjusting and restoring a returned light source signal, and a temperature alarm module connected to one side of the temperature optical fiber detector and used for early warning of abnormal conditions;
the strain early warning unit comprises a third light source, a strain detection optical fiber, a strain sensor, a strain optical fiber detector and a strain warning module, wherein the strain detection optical fiber is arranged on a rail along the rail direction and used for transmitting a light source signal, the strain sensor is arranged on the strain detection optical fiber, the strain optical fiber detector is connected to one end of the strain detection optical fiber and used for adjusting, restoring and returning the light source signal, and the strain warning module is connected to one side of the strain optical fiber detector and used for early warning abnormal;
the intelligent early warning device comprises a shell, the vibration optical fiber detector, the vibration alarm module, the temperature optical fiber detector, the temperature alarm module, the strain optical fiber detector and the strain alarm module are arranged inside the shell, and a data display module capable of displaying optical fiber detection data is arranged on the shell.
As a specific implementation manner, an optical fiber access slot is formed in a side wall of the housing, through which the vibration detection optical fiber, the temperature detection optical fiber and the strain detection optical fiber pass, and an optical fiber storage rack corresponding to the optical fiber access slot is disposed inside the housing.
As a specific embodiment, the optical fiber storage rack is provided with optical fiber fixing members at the front and back, and the bottom of the housing is provided with fixing grooves for clamping and locking the optical fiber fixing members.
As a specific embodiment, a vibration sensor protection box for protecting the vibration sensor is arranged outside the vibration sensor, vibration optical fiber grooves for the vibration detection optical fibers to pass through are arranged at two ends of the vibration sensor protection box, a plurality of springs arranged around the circumference of the vibration sensor are arranged on the periphery of the inner wall of the vibration sensor protection box, and vibration plates are fixed at the ends of the springs.
As a specific implementation manner, a temperature sensor protection box is arranged outside the temperature sensor, temperature optical fiber grooves for the temperature detection optical fibers to pass through are arranged at two ends of the temperature sensor protection box, a temperature sensor support for placing the temperature sensor is arranged in the temperature sensor protection box, and a ventilation groove for communicating with the outside air is arranged on the temperature sensor protection box.
As a specific implementation mode, the strain sensor outside is provided with and is used for protecting strain sensor's strain sensor protection box, strain sensor protection box includes box body and lid, the box body is including the first protection half-box and the second protection half-box that the symmetry set up, first protection half-box and be equipped with the coupling spring who is used for connecting both on the relative lateral wall of second protection half-box, first protection half-box and second protection half-box bottom central authorities are equipped with and are used for clamping strain sensor's strain sensor groove, strain sensor groove both sides be equipped with first protection half-box and second protection half-box are connected the face looks vertically and are used for holding strain detection optical fiber's strain optical fiber groove.
As a specific embodiment, the first protection half box is provided with a first box cover groove through which the box cover can penetrate, the top of the second protection half box is provided with a second box cover groove capable of accommodating the edge of the box cover, the box cover is provided with two bolts perpendicular to the box cover, the bolts move in a direction perpendicular to the box cover, and the bottoms of the bolts can tightly press the strain sensor on the surface of the rail.
As a specific embodiment, an optical fiber bracket for supporting the vibration detection optical fiber and the temperature detection optical fiber is arranged on the laying path of the vibration detection optical fiber and the temperature detection optical fiber, and the optical fiber bracket includes a fixing plate fixed on the cable trench, an optical fiber ring for the vibration detection optical fiber and the temperature detection optical fiber to pass through, and a support rod vertically arranged on the fixing plate and connected with the optical fiber ring.
As a specific embodiment, the number of the optical fiber rings may be multiple, the multiple optical fiber rings may be arranged along the direction of the support rod, and the multiple optical fiber rings may support multiple optical fibers.
As a specific implementation manner, be provided with on the laying path of strain detection optic fibre and be used for supporting strain detection optic fibre's strain optical fiber box, strain optical fiber box is including can the gomphosis in rail side box body and shutoff the box bottom of box body, the box body is close to rail waist one side and is equipped with and hold strain detection optic fibre puts into strain optical fiber hole, the box bottom is equipped with vertically sets up the spout to and follow the gliding slider of spout, the first end of slider is located the box body, the first end of slider with the box body is close to and is equipped with the optic fibre box spring between the railhead one side, the first end of slider with the box body is close to and is provided with the connecting rod between the railbottom one side.
The optical fiber intelligent early warning system provided by the invention has the beneficial effects that:
1. compared with the prior art, the monitoring is comprehensive, the coverage is wide, can carry out real-time supervision to unusual vibration in the railway environment, unusual temperature variation simultaneously, monitor the strain state of rail, and report to the police to the abnormal conditions, be favorable to grasping the railway situation rapidly, confirm that the abnormal conditions takes place type and the abnormal conditions place, in time send early warning signal, can in time carry out the route adjustment to the train of operation on the railway, promote the security of railway operation, optic fibre and optical fiber sensor have good anti-electromagnetic interference ability, the sensitivity is high, environmental suitability is strong.
2. According to the optical fiber intelligent early warning system provided by the invention, the optical fiber support is arranged along the optical fiber, and the protection device is arranged outside the optical fiber sensor, so that the optical fiber and the optical fiber sensor can be effectively protected, and the use safety, reliability and environmental adaptability of the system are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a system schematic diagram of an optical fiber intelligent early warning system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an intelligent early warning device of an optical fiber intelligent early warning system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an internal structure of a vibration sensor protection box of an optical fiber intelligent early warning system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a front view of a temperature sensor protection box of an optical fiber intelligent early warning system according to an embodiment of the present invention;
fig. 5 is a schematic view of an internal top-view structure of a strain sensor protection box body of an optical fiber intelligent early warning system according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a right-view structure of a strain sensor protection box body of the optical fiber intelligent early warning system according to the embodiment of the present invention;
fig. 7 is a schematic view of a vertical cross-sectional structure of a strain sensor protection box body of an optical fiber intelligent early warning system provided by an embodiment of the present invention, the cross-sectional structure being along a bolt center line;
fig. 8 is a schematic structural diagram of a strain sensor optical fiber bracket embodiment 1 of an optical fiber intelligent early warning system according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a strain sensor optical fiber bracket of an optical fiber intelligent early warning system according to embodiment 2 of the present invention;
fig. 10 is a schematic working diagram of a strain optical fiber box of an optical fiber intelligent warning system according to an embodiment of the present invention;
fig. 11 is a schematic diagram of an internal structure of a strain optical fiber box of an optical fiber intelligent warning system according to an embodiment of the present invention.
In the figure: 1. a housing; 2. an optical fiber access slot; 3. winding the column; 4. a first limit plate; 5. a second limiting plate; 6. a support frame; 7. fixing grooves; 8. vibrating the optical fiber groove; 9. a spring; 10. a vibrating plate; 11. a temperature fiber optic tank; 12. a ventilation slot; 13. a box cover; 14. a first protective half-case; 15. a second protective half-case; 16. a connecting spring; 17. a strain fiber groove; 18. a first lid groove; 19. a second lid groove; 20. a bolt; 21. a first strain sensor half-tank; 22. a second strain sensor half-tank; 23. a fixing plate; 24. a support bar; 25. a first half ring; 26. a second half ring; 27. a first connection portion; 28. a second connecting portion; 29. locking the nut; 30. a locking block; 31. a first fiber left half ring; 32. a first right half fiber ring; 33. a second fiber left half-ring; 34. a second fiber right half ring; 35. a fiber loop left connection portion; 36. a fiber ring right connection portion; 37. a box body; 38. a box bottom; 39. a slider; 40. a fiber optic cassette spring; 41. a connecting rod; 42. a rail; 43. a strain fiber hole; 44. and (5) grabbing the block.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, an optical fiber intelligent early warning system provided by the present invention is now described, which includes: the system comprises a vibration early warning unit capable of monitoring abnormal vibration of the railway, a temperature early warning unit capable of monitoring temperature change of the railway, a strain early warning unit capable of monitoring strain condition of a rail 42 and intelligent early warning equipment, wherein the vibration early warning unit, the temperature early warning unit and the strain early warning unit are parallel operation units, can be operated independently and can be operated simultaneously; the vibration early warning unit comprises a first light source, a vibration detection optical fiber arranged along the railway and used for transmitting a light source signal, a vibration sensor arranged on the vibration detection optical fiber, a vibration optical fiber detector connected to one end of the vibration detection optical fiber and used for adjusting and restoring a returned light source signal, and a vibration alarm module connected to one side of the vibration optical fiber detector and used for early warning of abnormal conditions; the temperature early warning unit comprises a second light source, a temperature detection optical fiber arranged along the railway and used for transmitting a light source signal, a temperature sensor arranged on the temperature detection optical fiber, a temperature optical fiber detector connected to one end of the temperature detection optical fiber and used for adjusting and restoring a returned light source signal, and a temperature alarm module connected to one side of the temperature optical fiber detector and used for early warning an abnormal condition; the strain early warning unit comprises a third light source, a strain detection optical fiber, a strain sensor, a strain optical fiber detector and a strain warning module, wherein the strain detection optical fiber is arranged on the rail 42 along the rail 42 and used for transmitting a light source signal, the strain sensor is arranged on the strain detection optical fiber, the strain optical fiber detector is connected to one end of the strain detection optical fiber and used for adjusting, restoring and returning the light source signal, and the strain warning module is connected to one side of the strain optical fiber detector and used for; the intelligent early warning device comprises a shell 1, wherein a vibration optical fiber detector, a vibration alarm module, a temperature optical fiber detector, a temperature alarm module, a strain optical fiber detector and a strain alarm module are arranged inside the shell 1, and a data display module capable of displaying optical fiber detection data is arranged on the shell 1.
Compared with the prior art, the optical fiber intelligent early warning system provided by the invention is comprehensive in monitoring and wide in coverage range, can be used for simultaneously monitoring abnormal vibration and abnormal temperature change in a railway environment in real time, monitoring the strain state of the rail 42 and alarming the abnormal condition, is favorable for rapidly mastering the railway condition, determining the type of the abnormal condition and the occurrence place of the abnormal condition, and timely sending out an early warning signal, can be used for timely adjusting the route of a train running on the railway, and improving the running safety of the railway, and the optical fiber sensor have excellent anti-electromagnetic interference capability, high sensitivity and strong environmental adaptability.
Specifically, referring to fig. 1, a laser can be selected as a light source, a vibration detection optical fiber and a temperature detection optical fiber can be laid in a cable trench along a railway to detect abnormal vibration and abnormal temperature change along the railway, and can detect train running conditions, rockfall along the railway, fire and other conditions in time, a vibration optical fiber detector analyzes and converts a return light signal in the vibration detection optical fiber, a temperature optical fiber detector analyzes and converts a return light signal in the temperature detection optical fiber, analyzes and converts the vibration signal and the temperature signal, exceeds a normal value range and sends out an early warning signal, a strain detection optical fiber is laid along a rail 42 to monitor the health state of the rail 42 in real time, a strain optical fiber detector analyzes and converts a return light signal in the strain detection optical fiber to detect the strain condition of the rail 42, and once the abnormal condition occurs due to deformation of the rail 42, manual patrol can be performed in time, the potential safety hazard is eliminated, the safety of railway operation is improved, three different early warning units can operate independently from each other, different monitoring requirements are met, the early warning units can also operate simultaneously, the operation state of the railway is monitored comprehensively, and the flexibility of system use and the safety of railway operation are improved.
As a specific embodiment of the optical fiber intelligent early warning system provided by the present invention, please refer to fig. 2, an optical fiber access slot 2 for passing the vibration detection optical fiber, the temperature detection optical fiber and the strain detection optical fiber is opened on a side wall of the housing 1, and an optical fiber storage rack corresponding to the optical fiber access slot 2 is provided inside the housing 1.
Specifically, please refer to fig. 2, shell 1 one side is equipped with a plurality of optic fibre access grooves 2 that are used for optic fibre to penetrate, optic fibre access groove 2 can fix a position optic fibre, prevent the optic fibre winding, easily carry out the recognition of optic fibre, optic fibre is accomodate and is erect and is put inside shell 1, be located optic fibre access groove 2 the place ahead respectively, can accomodate the optic fibre of redundant length, avoid optic fibre to take place to twine in shell 1 is inside, promote the accuracy that detects, optic fibre is accomodate the frame and is including being used for accomodating the "worker" character wheel of optic fibre and being used for supporting support frame 6 of "worker" character wheel, "worker" character wheel detachable sets up on support frame 6.
Further, please refer to fig. 2, "worker" character wheel is including being used for twining 3 of winding post of optic fibre and locating being used for of 3 both sides of winding post and injecing the optic fibre position, prevent first limiting plate 4 and the second limiting plate 5 that optic fibre drops, the center of first limiting plate 4 and 3 center coincidences of winding post, first limiting plate 4 is fixed in 3 one sides of winding post, 5 center of second limiting plate and 3 center coincidences of winding post, 5 detachable settings of second limiting plate are at 3 opposite sides of winding post, take off second limiting plate 5, can be with redundant optic fibre winding on 3 of winding post, the winding finishes, install second limiting plate 5 on 3 of winding post, the displacement of injecing optic fibre, prevent the optic fibre winding, the stability of hoisting device use.
As a specific embodiment of the optical fiber intelligent early warning system provided by the present invention, please refer to fig. 2, optical fiber fixing members are arranged at the front and the back of the optical fiber storage rack, and a fixing groove 7 for locking the optical fiber fixing members in a clamping manner is arranged at the bottom of the housing 1.
Specifically, please refer to fig. 2, the optical fiber fixing member is a U-shaped member, the optical fiber fixing member is placed at a position where the optical fiber is to be fixed, a free end of the optical fiber fixing member can be inserted into the fixing groove 7 to fix the optical fiber on the housing 1, a locking block is disposed on a side of the free end of the optical fiber fixing member away from the optical fiber, a locking groove matched with the locking block to lock the locking block is disposed in the fixing groove 7, and the locking block and the locking groove are matched to fix the optical fiber fixing member and the optical fiber passing.
As a specific embodiment of the optical fiber intelligent early warning system provided by the present invention, please refer to fig. 3, a vibration sensor protection box for protecting the vibration sensor is disposed outside the vibration sensor, vibration optical fiber grooves 8 for passing vibration detection optical fibers are disposed at two ends of the vibration sensor protection box, a plurality of springs 9 surrounding the circumference of the vibration sensor are disposed around the inner wall of the vibration sensor protection box, and a vibration plate 10 is fixed at an end of each spring 9.
Specifically, referring to fig. 3, the vibration sensor protection box is used for protecting the vibration sensor from the interference of the external environment, the vibration sensor is disposed in the vibration sensor protection box, the vibration detection optical fibers connected to the two ends of the vibration sensor pass through the vibration optical fiber grooves 8 disposed at the two ends of the vibration sensor protection box, the vibration optical fiber grooves 8 can limit the vibration detection optical fibers, the vibration optical fiber grooves 8 are disposed at the center of the two end faces, the inner wall of the vibration sensor protection box surrounding the vibration sensor is provided with springs 9 capable of transmitting vibration, one end of each spring 9 is fixed on the inner wall of the vibration sensor protection box, the other end of each spring is fixed with a vibration plate 10, the vibration sensor is disposed between the plurality of vibration plates 10, amplifies vibration signals to a certain extent, facilitates the transmission and monitoring of the signals, and can protect the vibration sensor and, the service life of the vibration sensor is prolonged, and the reliability of the equipment is improved.
Further, springs 9 are provided on both side walls of the vibration sensor protection case opposite to the vibration plate 10, and amplify a vibration signal in one direction.
Further, springs 9 and vibrating plates 10 are provided on the four side walls of the vibration sensor protection case, and amplify vibration signals in two directions.
Furthermore, the vibration sensor protection box comprises a first vibration sensor protection half box and a second vibration sensor protection half box which are arranged in an axisymmetric mode by taking the center connecting line of the vibration optical fiber groove 8 as the center connecting line, the first vibration sensor protection half box and the second vibration sensor protection half box can be completely buckled and locked, and the vibration sensor can be conveniently replaced.
Referring to fig. 4, as a specific embodiment of an optical fiber intelligent early warning system provided by the present invention, a temperature sensor protection box is disposed outside a temperature sensor, temperature optical fiber grooves 11 for passing temperature detection optical fibers are disposed at two ends of the temperature sensor protection box, a temperature sensor support for placing the temperature sensor is disposed in the temperature sensor protection box, and a ventilation groove 12 for communicating with outside air is disposed on the temperature sensor protection box.
Specifically, referring to fig. 4, the temperature sensor protection box is used to protect the temperature sensor from the external environment, the temperature sensor is disposed in the temperature sensor protection box, the temperature detection optical fiber connected with the two ends of the temperature sensor passes through the temperature optical fiber grooves 11 arranged at the two ends of the temperature sensor protection box, the temperature optical fiber grooves 11 can limit the temperature detection optical fiber, the temperature sensor support for supporting the temperature sensor is arranged in the temperature sensor protection box, the ventilation groove 12 convenient for the circulation with the outside air is arranged on the side wall of the temperature sensor protection box surrounding the temperature sensor, the change of the outside environment temperature can be sensed in time, the monitoring accuracy is improved, and the temperature sensor and the joint of the temperature sensor and the temperature detection optical fiber can be protected, the service life of the temperature sensor is prolonged, and the reliability of the equipment is improved.
Further, the temperature sensor protection box comprises a first temperature sensor protection half box and a second temperature sensor protection half box which are arranged in an axisymmetric mode by taking the central connecting line of the temperature optical fiber groove 11 as the central connecting line, the first temperature sensor protection half box and the second temperature sensor protection half box can be completely buckled and locked, and the temperature sensor protection box is favorable for installation and replacement.
Furthermore, the temperature sensor support is arranged in the first temperature sensor protection half box, the temperature sensor support is provided with a yielding groove capable of accommodating the temperature sensor and the temperature detection optical fiber connector, the protection of the temperature sensor and the connector is enhanced, the use reliability and safety of the device are improved, and the service life of the device is prolonged.
Further, be equipped with in the half box of second temperature sensor protection with temperature sensor support matched with apron, can carry out the position to the temperature sensor in the temperature sensor support and prescribe a limit to, prevent that temperature sensor from breaking away from the temperature sensor support, the reinforcing is to the protection of temperature sensor and joint, reliability and the security that hoisting device used, extension device life.
As a specific embodiment of the optical fiber intelligent early warning system provided by the present invention, please refer to fig. 5 to 7, a strain sensor protection box for protecting a strain sensor is disposed outside the strain sensor, the strain sensor protection box includes a box body and a box cover 13, the box body includes a first protection half-box 14 and a second protection half-box 15 which are symmetrically disposed, a connecting spring 16 for connecting the first protection half-box 14 and the second protection half-box 15 is disposed on a side wall opposite to the first protection half-box 14 and the second protection half-box 15, a strain sensor slot for clamping the strain sensor is disposed in the center of the bottom of the first protection half-box 14 and the second protection half-box 15, and strain optical fiber slots 17 for accommodating a strain detection optical fiber are disposed on two sides of the strain sensor slot and perpendicular to the connecting surface of the first protection half-box 14 and the second protection half-box 15.
Specifically, referring to fig. 5 to 7, the strain sensor protection box is used to protect the strain sensor from the external environment, the strain sensor is clamped in the strain sensor protection box, the strain detection optical fibers connected with the two ends of the strain sensor penetrate through the strain optical fiber grooves 17 arranged at the two ends of the strain sensor protection box, the strain optical fiber grooves 17 can limit the strain detection optical fibers to prevent the strain detection optical fibers from shifting, and protects the strain detection optical fiber, the first protection half-box 14 and the second protection half-box 15 are symmetrically fixed on the rail web of the rail 42, can be fixed by bonding or welding, the connecting spring 16 connects the first protection half-box 14 and the second protection half-box 15, prevents the first protection half-box 14 from being separated from the second protection half-box 15, there is a degree of freedom of displacement between the first protective half-case 14 and the second protective half-case 15 under the action of the connecting spring 16.
As a specific embodiment of the optical fiber intelligent early warning system provided by the present invention, referring to fig. 5 to 7, a first protection half-box 14 is provided with a first box cover groove 18 through which a box cover 13 can penetrate, a second box cover groove 19 capable of accommodating an edge of the box cover 13 is provided at a top of a second protection half-box 15, the box cover 13 is provided with two bolts 20 perpendicular to the box cover 13, the bolts 20 move in a direction perpendicular to the box cover 13, and the bottom of the bolts 20 can press the strain sensor on the surface of a rail 42.
Specifically, referring to fig. 5 to 7, the strain sensor is clamped in a strain sensor groove formed in the center of the bottom 38 of the strain sensor protection box, the box cover 13 is used for sealing the box body of the strain sensor protection box, the top of the box body is provided with a first box cover groove 18 and a second box cover groove 19, the box cover 13 can penetrate through the first box cover groove 18 and be inserted into the second box cover groove 19, the strain sensor protection box is blocked to reduce the influence of the external environment on the strain sensor, two groups of bolt 20 structures are arranged on the box cover 13, the bolts 20 can move in the direction vertical to the box cover 13, after the strain sensor is installed, the box cover 13 is inserted, the mounted strain sensor can be pressed on the surface of the rail 42 by the bolt 20, the sensitivity of the strain sensor to the strain of the rail 42 is improved, the safety of the strain sensor is improved, and the strain sensor is easy to replace.
Further, the strain sensor groove comprises a first strain sensor half-groove 21 and a second strain sensor half-groove 22, the first strain sensor half-groove 21 and the second strain sensor half-groove 22 are symmetrically arranged at the bottom of the first protection half-box 14 and the bottom of the second protection half-box 15, and two ends of the strain sensor are respectively clamped at the bottom of the first protection half-box 14 and the bottom of the second protection half-box 15.
Furthermore, when the strain sensor is installed, the strain sensor is clamped at the bottom 38 of the strain sensor protection box by means of adjustment of the connecting spring 16, the strain detection optical fiber penetrates out of the bottom 38 of the strain sensor protection box, the strain sensor protection box is fixed on a rail 42 along the laying direction of the strain optical fiber, the box cover 13 is inserted into the top end of the box body, the strain sensor is fixed by the mounting bolt 20, the use safety and the replacement convenience of the strain sensor are improved, and the service life is prolonged.
Further, the bottom of the bolt 20 is hemispherical, so that the bolt 20 is prevented from damaging the strain sensor.
As a specific embodiment of the optical fiber intelligent early warning system provided by the present invention, please refer to fig. 8, an optical fiber bracket for supporting the vibration detection optical fiber and the temperature detection optical fiber is disposed on the laying path of the vibration detection optical fiber and the temperature detection optical fiber, and the optical fiber bracket includes a fixing plate 23 fixed on the cable trench, an optical fiber ring for passing through the vibration detection optical fiber and the temperature detection optical fiber, and a support rod 24 vertically disposed on the fixing plate 23 and connected to the optical fiber ring.
Specifically, please refer to fig. 8, fiber support is used for supporting vibration detection optic fibre and temperature detection optic fibre, reduce the influence of external environment to optic fibre, fixed plate 23 is fixed on the cable trench wall that optic fibre laid, prevent that fiber support from droing, bracing piece 24 sets up perpendicularly and keeps away from cable trench wall one side at fixed plate 23, the bracing piece 24 other end is fixed with the optic fibre ring, the optic fibre ring can hold and support optic fibre, the optic fibre ring can open and shut, be convenient for carry out the installation dismantlement of optic fibre, the cooperation sets up the retaining member at bracing piece 24, can lock the optic fibre ring, the reliability that hoisting device used.
Furthermore, fix fiber support in the cable pit during use, when laying optic fibre, penetrate optic fibre ring with optic fibre, support optic fibre, prevent that optic fibre from damaging, reduce the influence of external environment to optic fibre.
Further, please refer to fig. 8, the optical fiber ring is an openable ring body, which facilitates installation and replacement of the optical fiber, the optical fiber ring includes a first half ring 25 and a second half ring 26, a first end of the first half ring 25 is hinged to a first end of the second half ring 26, a second end of the first half ring 25 is fixedly connected to a free end of the support rod 24 through a first connection portion 27, a second end of the second half ring 26 is provided with a second connection portion 28, the first connection portion 27 and the second connection portion 28 can be embedded into a connection portion having the same diameter as the support rod 24, the support rod 24 is externally provided with a locking nut 29, the support rod 24 and the connection portion are provided with threads matched with the locking nut 29, the locking nut 29 can lock the connection portion, convenience in use of the device is improved, and installation.
Further, referring to fig. 8, the first connecting portion 27 is provided with a locking block 30 for locking, and the second connecting portion 28 is provided with a locking groove for locking with the locking block 30, so as to improve the stability of the device.
As a specific embodiment of the optical fiber intelligent early warning system provided by the present invention, please refer to fig. 9, a plurality of optical fiber rings may be provided, the plurality of optical fiber rings are arranged along the direction of the support rod 24, and the plurality of optical fiber rings may support a plurality of optical fibers.
Specifically, referring to fig. 9, a plurality of optical fiber rings may be disposed along the direction of the support rod 24, and taking two optical fiber rings as an example, the first optical fiber ring, the second optical fiber ring and the support rod 24 are sequentially fixed, so that two optical fibers may be laid simultaneously, and the construction difficulty may be reduced.
Further, referring to fig. 9, the first optical fiber ring and the second optical fiber ring are openable ring bodies, and the second optical fiber ring is locked by the locking nut 29 disposed on the support rod 24, a fiber ring connecting portion is disposed between the first optical fiber ring and the second optical fiber ring, the first optical fiber ring includes a first optical fiber left half ring 31 and a first optical fiber right half ring 32, the second optical fiber ring includes a second optical fiber left half ring 33 and a second optical fiber right half ring 34, the fiber ring connecting portion includes a fiber ring left connecting portion 35 and a fiber ring right connecting portion 36, a first end of the first optical fiber left half ring 31 and a first end of the first optical fiber right half ring 32 are hinged, a second end of the first optical fiber left half ring 31 and a first end of the second optical fiber left half ring 33 are fixedly connected by the fiber ring left connecting portion 35, a second end of the first optical fiber right half ring 32 and a first end of the second optical fiber right half ring 34 are fixedly connected by the fiber ring, the left optical fiber ring connecting part 35 and the right optical fiber ring connecting part 36 can be connected in an embedded mode, and the using convenience of the device is improved.
Furthermore, optical fiber connecting portion locking device is provided with outward from optical fiber connecting portion, locking device includes with optical fiber connecting portion external diameter assorted locking ring and can carry out the retaining member of locking to the locking ring, the locking ring includes first locking semi-ring and second locking semi-ring, first locking semi-ring first end is articulated with second locking semi-ring first end, first locking semi-ring second end is equipped with outside first locking plate and the second locking plate of directional locking ring respectively with second locking semi-ring second end, first locking plate can closely laminate with the second locking plate, be provided with the screw that runs through first locking plate and second locking plate simultaneously, cooperation bolt 20, the nut can be fixed with second locking plate locking to first locking plate, and then lock optical fiber connecting portion, hoisting device stability in use.
As a specific embodiment of the optical fiber intelligent early warning system provided by the present invention, referring to fig. 10 to 11, a strain optical fiber box for supporting a strain detection optical fiber is disposed on a strain detection optical fiber laying path, the strain optical fiber box includes a box body 37 capable of being embedded on a side surface of a rail 42 and a box bottom 38 for plugging the box body 37, a strain optical fiber hole 43 for accommodating the strain detection optical fiber is disposed on a side of the box body 37 close to a rail waist, a sliding groove is disposed on the box bottom 38 in a longitudinal direction, and a slider 39 slides along the sliding groove, a first end of the slider 39 is disposed in the box body 37, an optical fiber box spring 40 is disposed between the first end of the slider 39 and the side of the box body 37 close to the rail head, and a connecting rod 41 is disposed between the first end of the slider 39.
Specifically, referring to fig. 10 and 11, the strain optical fiber box is used for fixing and protecting a strain detection optical fiber laid on a rail 42, and includes a box body 37 and a box bottom 38, the box body 37 is embedded on the rail 42, the box body 37 is made of a material that has a certain deformation and can be restored to deform, the box body 37 can be made of a metal material, the box body 37 can be clamped on the side surface of the rail 42, the box body 37 is close to the rail waist side and is provided with a strain optical fiber hole 43 that can accommodate the strain detection optical fiber, the box bottom 38 is provided with a grasping block 44 that is convenient to take, the box bottom 38 is provided with a slider 39, the slider 39 is placed in a sliding groove, a first end of the slider 39 is located inside the box body 37, a second end of the slider 39 is located outside the box body 37, the sliding groove direction is perpendicular to the strain optical fiber laying direction, a first end of the slider 39 and a side of the box body 37 close to, the first end of slider 39 is provided with connecting rod 41 with box body 37 near rail bottom one side, under the non-to slider 39 application of force state, under the effect of optic fibre box spring 40 and connecting rod 41, sticiss box body 37 on rail 42, prevents to meet an emergency the optical fiber box and drops, applys the power to optic fibre box spring 40 direction to slider 39, and under the effect of connecting rod 41, box body 37 is close to the effect of the power that connecting rod 41 one side lost rail 42, is convenient for pull down the optical fiber box that meets an emergency.
Furthermore, the first end of the connecting rod 41 is fixed below the sliding block 39, the second end of the connecting rod 41 can be in contact with the box body 37, the box body 37 is tightly pressed on the rail 42 under the action of the optical fiber box spring 40 and the connecting rod 41 in the state of no force application to the sliding block 39, the strain optical fiber box is prevented from falling off, the force in the direction of the optical fiber box spring 40 is applied to the sliding block 39, the acting force on the box body 37 is eliminated by the connecting rod 41, the force on the rail 42 is lost on one side, close to the connecting rod 41, of the box body 37, and the strain optical fiber box is convenient to detach.
Further, the first end of connecting rod 41 is fixed in slider 39 below, and connecting rod 41 second end is fixed with box body 37, under to slider 39 application of force state, under the effect of fiber box spring 40 and connecting rod 41, sticiss box body 37 on rail 42, prevents that the optical fiber box that meets an emergency from droing, applys the power to fiber box spring 40 direction to slider 39, and connecting rod 41 drives box body 37, and box body 37 is close to the effect of losing the power to rail 42 of connecting rod 41 one side, is convenient for pull down the optical fiber box that meets an emergency.
Furthermore, the anti-slip member is arranged on one side of the strain optical fiber box body 37 close to the rail 42, so that the friction force between the strain optical fiber box body and the rail 42 is increased, and the strain optical fiber box body is prevented from falling off.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An optical fiber intelligent early warning system, comprising: the system comprises a vibration early warning unit capable of monitoring abnormal vibration of the railway, a temperature early warning unit capable of monitoring temperature change of the railway, a strain early warning unit capable of monitoring strain condition of a rail and intelligent early warning equipment, wherein the vibration early warning unit, the temperature early warning unit and the strain early warning unit are parallel operation units, can be operated independently and can be operated simultaneously;
the vibration early warning unit comprises a first light source, a vibration detection optical fiber arranged along the railway and used for transmitting a light source signal, a vibration sensor arranged on the vibration detection optical fiber, a vibration optical fiber detector connected to one end of the vibration detection optical fiber and used for adjusting and restoring a returned light source signal, and a vibration alarm module connected to one side of the vibration optical fiber detector and used for early warning of abnormal conditions;
the temperature early warning unit comprises a second light source, a temperature detection optical fiber arranged along the railway and used for transmitting a light source signal, a temperature sensor arranged on the temperature detection optical fiber, a temperature optical fiber detector connected to one end of the temperature detection optical fiber and used for adjusting and restoring a returned light source signal, and a temperature alarm module connected to one side of the temperature optical fiber detector and used for early warning of abnormal conditions;
the strain early warning unit comprises a third light source, a strain detection optical fiber, a strain sensor, a strain optical fiber detector and a strain warning module, wherein the strain detection optical fiber is arranged on a rail along the rail direction and used for transmitting a light source signal, the strain sensor is arranged on the strain detection optical fiber, the strain optical fiber detector is connected to one end of the strain detection optical fiber and used for adjusting, restoring and returning the light source signal, and the strain warning module is connected to one side of the strain optical fiber detector and used for early warning abnormal;
the intelligent early warning device comprises a shell, the vibration optical fiber detector, the vibration alarm module, the temperature optical fiber detector, the temperature alarm module, the strain optical fiber detector and the strain alarm module are arranged inside the shell, and a data display module capable of displaying optical fiber detection data is arranged on the shell.
2. The intelligent optical fiber early warning system of claim 1, wherein a fiber access slot is formed in a side wall of the housing for the vibration detection fiber, the temperature detection fiber and the strain detection fiber to pass through, and a fiber storage rack corresponding to the fiber access slot is disposed inside the housing.
3. The intelligent optical fiber early warning system of claim 2, wherein optical fiber fixing members are arranged at the front and the back of the optical fiber storage rack, and fixing grooves capable of being locked by clamping are formed in the bottom of the shell.
4. The intelligent optical fiber early warning system according to claim 3, wherein a vibration sensor protection box for protecting the vibration sensor is arranged outside the vibration sensor, vibration optical fiber grooves for the vibration detection optical fibers to pass through are arranged at two ends of the vibration sensor protection box, a plurality of springs arranged around the circumference of the vibration sensor are arranged around the inner wall of the vibration sensor protection box, and vibration plates are fixed at the ends of the springs.
5. The intelligent optical fiber early warning system according to claim 4, wherein a temperature sensor protection box is arranged outside the temperature sensor, temperature optical fiber grooves for the temperature detection optical fibers to pass through are arranged at two ends of the temperature sensor protection box, a temperature sensor support for placing the temperature sensor is arranged in the temperature sensor protection box, and a ventilation groove for communicating with outside air is arranged on the temperature sensor protection box.
6. The intelligent optical fiber early warning system according to claim 5, wherein a strain sensor protection box for protecting the strain sensor is arranged outside the strain sensor, the strain sensor protection box comprises a box body and a box cover, the box body comprises a first protection half box and a second protection half box which are symmetrically arranged, connecting springs for connecting the first protection half box and the second protection half box are arranged on opposite side walls of the first protection half box and the second protection half box, a strain sensor groove for clamping the strain sensor is arranged in the center of the bottom of the first protection half box and the second protection half box, and strain optical fiber grooves perpendicular to the connecting surface of the first protection half box and the second protection half box and used for accommodating the strain detection optical fibers are arranged on two sides of the strain sensor groove.
7. An intelligent optical fiber early warning system as claimed in claim 6, wherein the first protection half box is provided with a first box cover groove through which the box cover can penetrate, the top of the second protection half box is provided with a second box cover groove which can accommodate the edge of the box cover, the box cover is provided with two bolts perpendicular to the box cover, the bolts move in a direction perpendicular to the box cover, and the bottoms of the bolts can press the strain sensor against the surface of the rail.
8. An optical fiber intelligent early warning system according to claim 7, wherein an optical fiber bracket for supporting the vibration detection optical fiber and the temperature detection optical fiber is arranged on the laying path of the vibration detection optical fiber and the temperature detection optical fiber, and the optical fiber bracket comprises a fixing plate fixed on the cable trench, an optical fiber ring for the vibration detection optical fiber and the temperature detection optical fiber to pass through, and a support rod vertically arranged on the fixing plate and connected with the optical fiber ring.
9. An intelligent optical fiber early warning system according to claim 8, wherein a plurality of optical fiber rings are provided, and a plurality of optical fiber rings are provided along the direction of the support rod, and a plurality of optical fibers are supported by the plurality of optical fiber rings.
10. An optical fiber intelligent early warning system according to claim 9, wherein a strain optical fiber box for supporting the strain detection optical fiber is arranged on the laying path of the strain detection optical fiber, the strain optical fiber box comprises a box body capable of being embedded on the side of the rail and a box bottom for plugging the box body, a hole for accommodating the strain detection optical fiber is arranged on the side of the box body close to the rail waist, a sliding groove is longitudinally arranged on the box bottom, and a sliding block slides along the sliding groove, a first end of the sliding block is arranged in the box body, an optical fiber box spring is arranged between the first end of the sliding block and the side of the box body close to the rail head, and a connecting rod is arranged between the first end of the sliding block and the side of the box body close to the rail bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110368755.7A CN113112766A (en) | 2021-04-06 | 2021-04-06 | Optical fiber intelligent early warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110368755.7A CN113112766A (en) | 2021-04-06 | 2021-04-06 | Optical fiber intelligent early warning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113112766A true CN113112766A (en) | 2021-07-13 |
Family
ID=76714177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110368755.7A Pending CN113112766A (en) | 2021-04-06 | 2021-04-06 | Optical fiber intelligent early warning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113112766A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543887A (en) * | 2022-02-25 | 2022-05-27 | 北京卫星环境工程研究所 | Optical fiber type multi-module comprehensive test system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09182058A (en) * | 1995-12-27 | 1997-07-11 | Hitachi Ltd | Gas insulated power transmission line monitoring system |
| DE102004037859A1 (en) * | 2004-08-04 | 2006-02-23 | Siemens Ag | Device and method for collision avoidance |
| CN201311275Y (en) * | 2008-12-12 | 2009-09-16 | 中铁西南科学研究院有限公司 | Tunnel periphery surface displacement transducer |
| CN102108657A (en) * | 2011-02-14 | 2011-06-29 | 武汉理工大学 | Method and device for monitoring state of ballastless track structure through fibber bragg grating sensing |
| CN206961275U (en) * | 2017-05-04 | 2018-02-02 | 上海捷冶光电科技有限公司 | Based on optical fiber perimeter monitoring system |
| CN108909775A (en) * | 2018-06-21 | 2018-11-30 | 武汉理工大学 | A kind of railway monitoring device based on weak optical fiber Bragg grating |
| CN111127794A (en) * | 2020-01-20 | 2020-05-08 | 南通围界盾智能科技有限公司 | Optical fiber fence concealed detection system |
| CN212256515U (en) * | 2020-05-28 | 2020-12-29 | 王昊冉 | Fire-fighting early warning system |
-
2021
- 2021-04-06 CN CN202110368755.7A patent/CN113112766A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09182058A (en) * | 1995-12-27 | 1997-07-11 | Hitachi Ltd | Gas insulated power transmission line monitoring system |
| DE102004037859A1 (en) * | 2004-08-04 | 2006-02-23 | Siemens Ag | Device and method for collision avoidance |
| CN201311275Y (en) * | 2008-12-12 | 2009-09-16 | 中铁西南科学研究院有限公司 | Tunnel periphery surface displacement transducer |
| CN102108657A (en) * | 2011-02-14 | 2011-06-29 | 武汉理工大学 | Method and device for monitoring state of ballastless track structure through fibber bragg grating sensing |
| CN206961275U (en) * | 2017-05-04 | 2018-02-02 | 上海捷冶光电科技有限公司 | Based on optical fiber perimeter monitoring system |
| CN108909775A (en) * | 2018-06-21 | 2018-11-30 | 武汉理工大学 | A kind of railway monitoring device based on weak optical fiber Bragg grating |
| CN111127794A (en) * | 2020-01-20 | 2020-05-08 | 南通围界盾智能科技有限公司 | Optical fiber fence concealed detection system |
| CN212256515U (en) * | 2020-05-28 | 2020-12-29 | 王昊冉 | Fire-fighting early warning system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543887A (en) * | 2022-02-25 | 2022-05-27 | 北京卫星环境工程研究所 | Optical fiber type multi-module comprehensive test system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201662859U (en) | Light-guide fiber monitoring and alarming system for cable fault, stealing and pipeline damage | |
| CN113112766A (en) | Optical fiber intelligent early warning system | |
| CN109243123A (en) | A kind of well lid status real time monitor early warning system and method | |
| CN205880250U (en) | Knowledge device is examined to foreign matter between subway shield door and train door | |
| CN106840715A (en) | Train bogie unstability detection sensor detecting system and method | |
| CN109541715A (en) | Railway foreign matter invasion safety sensing and identification system based on distributed optical fiber sensing | |
| CN112012796B (en) | High gas tunnel trolley explosion-proof control box | |
| CN111577386A (en) | Tunnel protection door state monitoring system based on sound recognition | |
| CN108128704A (en) | A kind of security monitoring management system for tower crane with improper power down function | |
| CN109941294A (en) | Railway endless rope traction shuttle car automated security control system | |
| CN210321715U (en) | Civil air defense gantry crane angle state detection system | |
| CN209103468U (en) | A kind of well lid status real time monitor early warning system | |
| CN208208084U (en) | Goggles-shaped gate Real-time security monitoring system | |
| CN204777390U (en) | Rubber belt conveyor protection device | |
| CN219277430U (en) | Warehouse inspection device | |
| CN212250149U (en) | Tunnel protection door state monitoring system based on sound recognition | |
| CN113437796B (en) | Intelligent early warning cable system | |
| KR200194786Y1 (en) | A long range optical fiber fault prevention system | |
| CN200961787Y (en) | Oil delivery pipe detector for preventing oil theft | |
| CN112785810B (en) | Warning device for security engineering | |
| CN209514163U (en) | A kind of optical cross box door opening state intelligent detection device | |
| CN216211402U (en) | Commodity safety device with clamping arm | |
| CN216511033U (en) | Conveyer belt anti-tearing device for conveyer | |
| CN219758933U (en) | Optical fiber sensing alarm convenient to disassemble and assemble | |
| CN109707438B (en) | Anti falling device suitable for tunnel protection door |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210713 |
|
| RJ01 | Rejection of invention patent application after publication |