CN202816098U - Multifunctional security alarm system based on line construction security protection - Google Patents
Multifunctional security alarm system based on line construction security protection Download PDFInfo
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- CN202816098U CN202816098U CN 201220479630 CN201220479630U CN202816098U CN 202816098 U CN202816098 U CN 202816098U CN 201220479630 CN201220479630 CN 201220479630 CN 201220479630 U CN201220479630 U CN 201220479630U CN 202816098 U CN202816098 U CN 202816098U
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Abstract
The utility model provides a multifunctional security alarm system based on line construction security protection. The system comprises an automatic pre-warning monitoring device, a relay forwarding device, an automatic alarm host device and an automatic alarm and remote monitoring platform connected in sequence. The multifunctional security alarm system further comprises a portable security alarm device, and the portable security alarm device is connected with the automatic alarm host device. The automatic pre-warning monitoring device acquires alarm signals of an accident happening on the construction site, the alarm signals are forwarded to the automatic alarm host device via the relay forwarding device; the automatic alarm host device carries out alarm processing and sending the corresponding alarm accident information to the automatic alarm and remote monitoring platform for filing, supervision, and management. According to the multifunctional security alarm system based on line construction security protection, danger to a group due to personal negligence can be avoided; efficiency of maintenance, emergency rescue, disaster relief, and accident prevention can be improved; security protection with no one on duty can be finally realized; and the accident casualties are reduced.
Description
[technical field]
The utility model relates to line construction safety technique field, particularly a kind of multifunctional safe warning system based on the line construction security protection.
[background technology]
In recent years, development along with society, the development such as railway, highway, mining tunnel rapidly, it is in order to ensure the progress of construction, crack, the workshop operation of just need to being expert at, this has just proposed a new problem to the protection of construction safety, requires to roadbed, track, along putting maintenance into practices such as road facility, roads, speedily carries out rescue work and the disaster relief will be pointed out or warn, and could effectively avoid like this serious life property injures and deaths that cause thus or the generation of secondary disaster accident.In the existing society, the line construction Security Officer reports to the police or suggestion device without carrying with it, when if its line construction scene has an accident, the workmen can only listen to broadcasting, just can know the generation that accident is arranged, just flee the scene, if such broadcast delays will jeopardize workmen's life.The site operation personnel also can't get rid of because the poor or a riot of sound operating personnel of impact of the on-the-spot sight line of construction operation in time finds the hidden danger of warning message, cause dangerous situation more serious, even accident occur.And existing automatic alarm host apparatus just is provided with an audible-visual annunciator, if this audible-visual annunciator damages, just can not report to the police, and existing like this automatic alarm host apparatus lacks reliability.
At present, there has been relevant technology to make in this respect good try, such as a kind of " railway construction safety prewarning device ", see that publication number is: CN101279608, open day be: the Chinese patent of 2008.10.08, this railway construction safety prewarning device, consisted of by transmitting terminal and receiving end, described transmitting terminal is by ultrasonic wave module, wireless transmitter module, the MCU module, power module consists of, wherein the ultrasonic wave module signal transmission is to the MCU module, the MCU module is transferred to wireless transmitter module by interface with the signal that receives, and power module is given respectively ultrasonic wave module, wireless transmitter module, the MCU module provides power supply; Described receiving end is made of alarm module, MCU module, wireless receiving module, power module, wherein wireless receiving module receives the transmitted signal of the wireless transmitter module in the transmitting terminal, wireless transmitter module is transferred to the MCU module by interface with the signal that receives, and the MCU module is transferred to alarm module with signal.This invention reliability is high, and security is also high.But the problem of the early warning failure of communicating by letter that the detection that this invention can't solve the safety early warning device equipment of itself and tamper-proof or self unstable factor such as tilt and collapse cause; And the single alarm module that adopts when this alarm module goes wrong, just can't be reported to the police in time.
And for example a kind of " railway construction safety prewarning device ", see that publication number is: CN201989811U, open day be: the Chinese patent of 2011.09.28, this safety early warning device relates to the road construction safety alarm device, is specially construction safety protection alarm device.Construction safety protection alarm device is comprised of alarm terminal (1), wireless digital broadcasting station (2), Train Approaching sense terminals (3) and sensor (4), described sensor (4) connects Train Approaching sense terminals (3), Train Approaching sense terminals (3) connects wireless digital broadcasting station (2), and alarm terminal (1) setting can receive the signal that wireless digital broadcasting station (2) is launched.The technique effect of this utility model shows: when having guaranteed construction of railways, maintenance activity, the hazardous location is in time withdrawn in operating personnel's personal safety.But the problem of the early warning failure of communicating by letter that the detection that this utility model can't solve the safety alarm device equipment of itself and tamper-proof or self unstable factor such as tilt and collapse cause; And the detection means that adopts is more single.
[summary of the invention]
The technical problems to be solved in the utility model is to provide a kind of multifunctional safe warning system based on the line construction security protection, and it can in time notify operating personnel and security protected personnel, reduction accident personnel's injures and deaths with alerting signal.
The utility model is achieved in that a kind of multifunctional safe warning system based on the line construction security protection, and this system comprises automatic early-warning monitoring device, relay forwarding device, automatic alarm host apparatus and the automatic alarm remote supervisory platform that connects successively; Described automatic early-warning monitoring device comprises: object enters monitoring modular, very first time synchronizer, a MCU, the first radio communication function detection module, the first equipment and topples over detection module, the first feed circuit and signal emission module; Described object enters monitoring modular, very first time synchronizer, the first radio communication function detection module, the first equipment topples over detection module, the first feed circuit, signal emission module and all is connected with a described MCU; Described object enters detection module and comprises: at least one group of grating sensor, movement of objects detection module and object proximity detection module; Described one group is two corresponding grating sensors that arrange, and described one group of grating sensor, movement of objects detection module, object proximity detection module all are connected with a described MCU; Described relay forwarding device comprises: the trunk module, the first equipment automatic detection circuit and the second feed circuit that connect successively; Described automatic alarm host apparatus comprises: the second synchrotimer, the 2nd MCU, the second radio communication function detection module, the second equipment are toppled over detection module, first signal receiver module, information display screen, image capture module, telecommunication control module and two-circuit audible-visual annunciator; Described the second synchrotimer, the second radio communication function detection module, the second equipment are toppled over detection module, first signal receiver module, information display screen, image capture module, telecommunication control module, two-circuit audible-visual annunciator and are connected with described the 2nd MCU; Described automatic alarm remote supervisory platform comprises: the secondary signal receiver module that connects successively, be used for server and the first sound light crossing-signal of automatic alarm remote monitoring.
Further, described automatic alarm host apparatus also comprises portable set forwarding module and the 3rd feed circuit, and described portable set forwarding module, the 3rd feed circuit are connected with described the 2nd MCU.
Further, this system comprises a portable secured warning device, and this portable secured warning device is connected with described automatic alarm host apparatus; Described portable secured warning device comprises: the 3rd signal receiving module, Vib., second sound light crossing-signal and the 4th feed circuit; Described Vib., second sound light crossing-signal, the 4th feed circuit all are connected with described the 3rd signal receiving module; The 3rd signal receiving module and described portable set forwarding module carry out communication.
Further, described first signal receiver module, secondary signal receiver module, the 3rd signal receiving module include: the first Point-to-Point Data Transmission transceiver module, the first wireless self-networking communication module, a GPRS communication module and the first wire communication module.
Further, described signal emission module comprises: the second Point-to-Point Data Transmission transceiver module, the second wireless self-networking communication module, the 2nd GPRS communication module and the second wire communication module; Described the second Point-to-Point Data Transmission transceiver module, the second wireless self-networking communication module, the 2nd GPRS communication module, the second wire communication module all are connected with a described MCU.
Further, described the first equipment is toppled over detection module and the second equipment and is toppled over detection module and be obliquity sensor.
Further, described movement of objects detection module comprises: laser sensor, radar sensor and microwave remote sensor; Described laser sensor, radar sensor, microwave remote sensor all are connected with a described MCU.
Further, described object proximity detection module comprises: proximity transducer, induction pick-up, limit sensors and photoelectric sensor; Described proximity transducer, induction pick-up, limit sensors, photoelectric sensor all are connected with a described MCU.
The utility model has the advantage of: the automatic early-warning monitoring device in the utility model is by one group of grating sensor, movement of objects detection module and object proximity detection module, detect the accident of working-yard, the technological means variation of its detection, improve the practicality of device, it has increased the reliability of equipment self-inspection technological means raising device, topple over detection module by the first radio communication function detection module, the first equipment, increased tamper-proof or self unstable detection technique means that tilt and collapse; Use instantaneity and reliability that multiple communication technology assembled scheme raising information is transmitted.Automatic alarm host apparatus in the utility model has increased the reliability that the equipment self-inspection technological means improves device, topples over detection module by the second equipment, has increased tamper-proof or self unstable detection technique means that tilt and collapse; Guarantee the in time discovery dangerous situation such as operating personnel and security protected personnel by the much information transfer mode in the first signal receiver module, thoroughly dispel misgivings as realizing that unmanned provides safeguard; Its image capture module can gather into video data with on-the-spot scale removal process after work progress or the construction end and preserve.Portable secured warning device in the utility model can be carried, the mode of using vibration or sound and light alarm guarantees that warning message can notify operating personnel and security protected personnel, has got rid of the workmen and can't get rid of the hidden danger of in time finding warning message because of the poor or a riot of sound operating personnel of impact of construction operation scene sight line.Multifunctional safe warning system of the present utility model realizes that finally the unmanned security protection reduces enterprise cost, reduction accident personnel's injures and deaths.
[description of drawings]
Fig. 1 is the structural representation of the utility model the first embodiment.
Fig. 2 is the structural representation of the utility model the second embodiment.
[embodiment]
Multifunctional safe warning system of the present utility model is divided into five parts.First is the automatic early-warning monitoring device, whether enter warning region by one or more detection sensing technology equipment monitoring objects, in the mode of wired or multiple wireless combination data are transmitted directly or through the relay forwarding device and be sent to the automatic alarm host apparatus; Second portion is the relay forwarding device, and with the information of warning region automatic early-warning monitoring device transmission and the status information of self, the mode with multiple wireless combination after processing of circuit is sent to the automatic alarm host apparatus; Third part is the automatic alarm host apparatus, the wired or wireless information that receives after processing, two-circuit audible-visual annunciator and synchrotimer is illustrated in the construction operation scene with audio warning (can customized voice) and the mode of warning light, remind the safe escapes such as site work personnel belongings, also can show default relevant information by information display screen, from visually reminding the passing vehicles or pedestrians of wish, and by the telecommunication control module information being sent to automatic alarm remote supervisory platform, the cleaning situation be sent to automatic alarm remote supervisory platform after also working-yard operation situation and construction being finished by image capture module simultaneously; The 4th part is automatic alarm remote supervisory platform, the server that is used for the automatic alarm remote monitoring will receive information display in O﹠M or rescue and relief work system platform, synchronous GIS(Geographic Information System) graphical information is then more directly perceived, and generation sound and light alarm information, the progress that automatic alarm remote supervisory platform can be supervised the construction operation scene, and cleaning situation after the construction operation end, the reference frame of remote supervisory management is provided and reaches the examination purpose.In addition, also having a part, is exactly the 5th part: portable secured warning device, evading site environment affects the dangerous situation generation that warning message can't in time pass to operation and security protection personnel.
See also shown in Figure 1, a kind of multifunctional safe warning system based on the line construction security protection of the first embodiment of the present utility model, this system comprise automatic early-warning monitoring device 1, relay forwarding device 2, automatic alarm host apparatus 3 and the automatic alarm remote supervisory platform 4 that connects successively; Described automatic early-warning monitoring device 1 comprises: object enters monitoring modular 11, very first time synchronizer 12, a MCU13, the first radio communication function detection module 14, the first equipment and topples over detection module 15, the first feed circuit 16 and signal emission module 17; Described object enters monitoring modular 11, very first time synchronizer 12, the first radio communication function detection module 14, the first equipment topples over detection module 15, the first feed circuit 16, signal emission module 17 and all is connected with a described MCU13; This very first time synchronizer 12 can be adjusted the time in the automatic early-warning monitoring device 1, thereby precise time occurs the accident that can obtain; The first radio communication function detection module 14 is for detection of whether normal operation of the radio communication function in the signal emission module 17 in the device; Described object enters detection module 11 and comprises: at least one group of grating sensor 111, movement of objects detection module 112 and object proximity detection module 113; Described one group is two corresponding grating sensors that arrange, and described one group of grating sensor 111, movement of objects detection module 112, object proximity detection module 113 all are connected with a described MCU13; Described relay forwarding device 2 comprises: the trunk module 21, the first equipment automatic detection circuit 22 and the second feed circuit 23 that connect successively; Described automatic alarm host apparatus 3 comprises: the second synchrotimer 31, the 2nd MCU32, the second radio communication function detection module 33, the second equipment are toppled over detection module 34, first signal receiver module 35, information display screen 36, image capture module 37, telecommunication control module 38 and two-circuit audible-visual annunciator 39; Described the second synchrotimer 31, the second radio communication function detection module 33, the second equipment are toppled over detection module 34, first signal receiver module 35, information display screen 36, image capture module 37, telecommunication control module 38, two-circuit audible-visual annunciator 39 and are connected with described the 2nd MCU32;
This second synchrotimer 31 can be adjusted the time in the automatic alarm host apparatus 3, thereby precise time occurs the accident that can obtain; Whether this second radio communication function detection module 33 occurs unusually for detection of the radio communication function in the first signal receiver module 35; Information display screen 36 is used for the information state of display alarm information and appliance arrangement abnormal; Image capture module 37 is based on the image acquisition that fpga chip is realized, is used for that on-the-spot scale removal process after work progress or the construction end is gathered into video data and preserves; Telecommunication control module 38 is used for alerting signal is transmitted to automatic alarm remote supervisory platform 4; Two-circuit audible-visual annunciator 39 adopts the alarm of COMS integrated circuit technique design, can cooperate various measuring instruments to monitor the situation of change of on-the-spot contact; In time fix a breakdown, guarantee the safety of production run; Its instant one road sound and light alarm information circuit that damages damages, and another road sound and light alarm information circuit also can use, and guarantees the reliability of equipment.Wherein, described the first equipment is toppled over detection module 15 and the second equipment and is toppled over detection module 34 and be obliquity sensor.This first equipment is toppled over detection module 15 and the second equipment and is toppled over detection module 34 and be used for whether run-off the straight of device, so that device can't normal operation.
Described automatic alarm remote supervisory platform 4 comprises: the secondary signal receiver module 41 that connects successively, be used for server 42 and the first sound light crossing-signal 43 of automatic alarm remote monitoring.
In the utility model, described automatic alarm host apparatus 3 also comprises portable set forwarding module 391 and the 3rd feed circuit 392, and described portable set forwarding module 391, the 3rd feed circuit 392 are connected with described the 2nd MCU32.This portable set forwarding module 391 is for the portable set that alerting signal is transmitted to warning function.
Described movement of objects detection module 112 comprises: laser sensor 1121, radar sensor 1122 and microwave remote sensor 1123; Described laser sensor 1121, radar sensor 1122, microwave remote sensor 1123 all are connected with a described MCU13.
Described object proximity detection module 113 comprises: proximity transducer 1131, induction pick-up 1132, limit sensors 1133 and photoelectric sensor 1134; Described proximity transducer 1131, induction pick-up 1132, limit sensors 1133, photoelectric sensor equal 1134 are connected with a described MCU13.
As shown in Figure 2, be the structural representation of the utility model the second embodiment.The difference of this embodiment and the first embodiment is: described multifunctional safe warning system also comprises a portable secured warning device 5, and this portable secured warning device 5 is connected with described automatic alarm host apparatus 3; Described portable secured warning device 5 comprises: the 3rd signal receiving module 51, Vib. 52, second sound light crossing-signal 53 and the 4th feed circuit 54; Described Vib. 52, second sound light crossing-signal 53, the 4th feed circuit 54 all are connected with described the 3rd signal receiving module 51; The 3rd signal receiving module 51 carries out communication with described portable set forwarding module 391.
Wherein, first signal receiver module 35, secondary signal receiver module 41, the 3rd signal receiving module 51 include: the first Point-to-Point Data Transmission transceiver module 61, the first wireless self-networking communication module 62, a GPRS communication module 63 and the first wire communication module 64.
Principle of work of the present utility model is as follows:
1, according to the working-yard characteristics of repair and maintenance, increase the sensor of grating sensor or reflection technology in the warning region forward position, after entering this zone, object forms blocking-up or the reflection of certain hour;
2, increasing object proximity test module comprises: proximity transducer, induction pick-up, limit sensors and photoelectric sensor, and it is placed in position, warning region forward position temporarily, produces corresponding signal when object enters this zone certain hour;
3, using the movement of objects detection module comprises: laser sensor, radar sensor and microwave remote sensor carry out ranging and range rate, send warning information during the close warning region of monitoring object;
4, the automatic early-warning monitoring device in the utility model is by the detection of above-mentioned means, when the generation that detects mishap, the automatic early-warning monitoring device will obtain early warning signal by a MCU, and early warning signal transmitted through the relay forwarding device by signal emission module be sent to the automatic alarm host apparatus, the processing of reporting to the police timely; Covering between this relay forwarding device for prolonging operation area.
5, in addition, the utility model requires to increase very first time synchronizer to the automatic early-warning monitoring device according to the engineering time management and control;
6, the automatic early-warning monitoring device has increased tamper-proof or self unstable detection technique means that tilt and collapse;
7, the automatic early-warning monitoring device increases equipment Automatic Measurement Technique means and improves reliability;
8, use instantaneity and the reliability that multiple communication technology assembled scheme raising information is transmitted in the automatic early-warning monitoring device;
9, automatic alarm host apparatus, report to the police timely process after, can with alerting signal and warning message by the telecommunication control module in the automatic alarm host apparatus, send to automatic alarm remote supervisory platform; Or by the portable set forwarding module in the automatic alarm host apparatus, send to portable secured warning device;
10, the server that is used for the automatic alarm remote monitoring in the automatic alarm remote supervisory platform will receive information display in O﹠M or rescue and relief work system platform, synchronous GIS(Geographic Information System) graphical information is then more directly perceived, and generation sound and light alarm information, the progress that automatic alarm remote supervisory platform can be supervised the construction operation scene, and cleaning situation after the construction operation end, the reference frame of remote supervisory management is provided and reaches the examination purpose.
11, portable secured warning device receives the alerting signal that monitors by the 3rd signal receiving module, by Vib., second sound light crossing-signal vibrate, the mode of sound and light alarm guarantees that warning message can in time notify operating personnel and security protected personnel, got rid of because the poor or a riot of sound operating personnel of impact of the on-the-spot sight line of construction operation in time finds the hidden danger of warning message.
In a word, automatic alarm remote supervisory platform of the present utility model can fully understand the duty of operation field safety device; Can manage the application configuration relation of any one or a plurality of devices; That pick-up unit carries is convenient, improve safeguards, speedily carry out rescue work, the disaster relief, trouble-saving efficient, simplify the operation field Security Personnel, reduction labour intensity is finally realized the unmanned security protection; Need not to use specific means of communication and equipment, application is extensive.
The above only is preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (8)
1. multifunctional safe warning system based on the line construction security protection is characterized in that: this system comprises automatic early-warning monitoring device, relay forwarding device, automatic alarm host apparatus and the automatic alarm remote supervisory platform that connects successively; Described automatic early-warning monitoring device comprises: object enters monitoring modular, very first time synchronizer, a MCU, the first radio communication function detection module, the first equipment and topples over detection module, the first feed circuit and signal emission module; Described object enters monitoring modular, very first time synchronizer, the first radio communication function detection module, the first equipment topples over detection module, the first feed circuit, signal emission module and all is connected with a described MCU; Described object enters detection module and comprises: at least one group of grating sensor, movement of objects detection module and object proximity detection module; Described one group is two corresponding grating sensors that arrange, and described one group of grating sensor, movement of objects detection module, object proximity detection module all are connected with a described MCU; Described relay forwarding device comprises: the trunk module, the first equipment automatic detection circuit and the second feed circuit that connect successively; Described automatic alarm host apparatus comprises: the second synchrotimer, the 2nd MCU, the second radio communication function detection module, the second equipment are toppled over detection module, first signal receiver module, information display screen, image capture module, telecommunication control module and two-circuit audible-visual annunciator; Described the second synchrotimer, the second radio communication function detection module, the second equipment are toppled over detection module, first signal receiver module, information display screen, image capture module, telecommunication control module, two-circuit audible-visual annunciator and are connected with described the 2nd MCU; Described automatic alarm remote supervisory platform comprises: the secondary signal receiver module that connects successively, be used for server and the first sound light crossing-signal of automatic alarm remote monitoring.
2. the multifunctional safe warning system based on the line construction security protection according to claim 1, it is characterized in that: described automatic alarm host apparatus also comprises portable set forwarding module and the 3rd feed circuit, and described portable set forwarding module, the 3rd feed circuit are connected with described the 2nd MCU.
3. the multifunctional safe warning system based on the line construction security protection according to claim 2, it is characterized in that: this system comprises a portable secured warning device, this portable secured warning device is connected with described automatic alarm host apparatus; Described portable secured warning device comprises: the 3rd signal receiving module, Vib., second sound light crossing-signal and the 4th feed circuit; Described Vib., second sound light crossing-signal, the 4th feed circuit all are connected with described the 3rd signal receiving module; The 3rd signal receiving module and described portable set forwarding module carry out communication.
4. the multifunctional safe warning system based on the line construction security protection according to claim 3, it is characterized in that: described first signal receiver module, secondary signal receiver module, the 3rd signal receiving module include: the first Point-to-Point Data Transmission transceiver module, the first wireless self-networking communication module, a GPRS communication module and the first wire communication module.
5. the multifunctional safe warning system based on the line construction security protection according to claim 1, it is characterized in that: described signal emission module comprises: the second Point-to-Point Data Transmission transceiver module, the second wireless self-networking communication module, the 2nd GPRS communication module and the second wire communication module; Described the second Point-to-Point Data Transmission transceiver module, the second wireless self-networking communication module, the 2nd GPRS communication module, the second wire communication module all are connected with a described MCU.
6. the multifunctional safe warning system based on the line construction security protection according to claim 1 is characterized in that: described the first equipment is toppled over detection module and the second equipment and is toppled over detection module and be obliquity sensor.
7. the multifunctional safe warning system based on the line construction security protection according to claim 1, it is characterized in that: described movement of objects detection module comprises: laser sensor, radar sensor and microwave remote sensor; Described laser sensor, radar sensor, microwave remote sensor all are connected with a described MCU.
8. the multifunctional safe warning system based on the line construction security protection according to claim 1, it is characterized in that: described object proximity detection module comprises: proximity transducer, induction pick-up, limit sensors and photoelectric sensor; Described proximity transducer, induction pick-up, limit sensors, photoelectric sensor all are connected with a described MCU.
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| CN 201220479630 CN202816098U (en) | 2012-09-19 | 2012-09-19 | Multifunctional security alarm system based on line construction security protection |
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| CN 201220479630 CN202816098U (en) | 2012-09-19 | 2012-09-19 | Multifunctional security alarm system based on line construction security protection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295363A (en) * | 2013-06-19 | 2013-09-11 | 贵州省道路交通安全协会 | Pressure-sensitive/inclination sensing accident site alarming system |
| CN103617575A (en) * | 2013-11-19 | 2014-03-05 | 常熟市古里镇白茆联动建筑变形缝装置厂 | Construction management system |
| CN105857347A (en) * | 2016-03-30 | 2016-08-17 | 珠海智信电力科技有限公司 | Intelligent safety protection system for railway construction work |
| CN113160519A (en) * | 2021-04-21 | 2021-07-23 | 湖南工业大学 | Railway is with long-range readable warning sign device |
-
2012
- 2012-09-19 CN CN 201220479630 patent/CN202816098U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295363A (en) * | 2013-06-19 | 2013-09-11 | 贵州省道路交通安全协会 | Pressure-sensitive/inclination sensing accident site alarming system |
| CN103295363B (en) * | 2013-06-19 | 2015-07-08 | 贵州省道路交通安全协会 | Pressure-sensitive/inclination sensing accident site alarming system |
| CN103617575A (en) * | 2013-11-19 | 2014-03-05 | 常熟市古里镇白茆联动建筑变形缝装置厂 | Construction management system |
| CN105857347A (en) * | 2016-03-30 | 2016-08-17 | 珠海智信电力科技有限公司 | Intelligent safety protection system for railway construction work |
| CN113160519A (en) * | 2021-04-21 | 2021-07-23 | 湖南工业大学 | Railway is with long-range readable warning sign device |
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