CN202369306U - Safety monitoring and early warning device and safety monitoring system for tower crane - Google Patents
Safety monitoring and early warning device and safety monitoring system for tower crane Download PDFInfo
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- CN202369306U CN202369306U CN2011204558343U CN201120455834U CN202369306U CN 202369306 U CN202369306 U CN 202369306U CN 2011204558343 U CN2011204558343 U CN 2011204558343U CN 201120455834 U CN201120455834 U CN 201120455834U CN 202369306 U CN202369306 U CN 202369306U
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Abstract
The device comprises a main control module, a storage module, an alarm module, two GPS modules and an RFID reader-writer, wherein the storage module, the alarm module, the two GPS modules and the RFID reader-writer are connected to the main control module, the two GPS modules are respectively installed on a tower body and a tower arm of a tower crane, the tower crane is further provided with an RFID tag, and the RFID reader-writer is used for writing characteristic information of the tower crane into the RFID tag and reading the RFID tag on other tower cranes or obstacles in an operation environment so as to acquire the characteristic information of the corresponding tower crane or obstacles. The safety monitoring system comprises a monitoring center and at least two safety monitoring early warning devices. The monitoring and early warning device can timely and accurately acquire the real-time position and motion information of the tower crane and the distance between the monitoring and early warning device and other tower cranes or barriers in the operation environment, and provide early warning signals for drivers. The positioning precision is high, and the storage and mutual transmission of large-capacity operation data between the tower cranes can be completed.
Description
Technical field
The utility model relates to the monitoring early warning and safety device of the monitoring early warning and safety device, particularly a kind of active anticollision of tower crane, and the system of this device composition.
Background technology
Tower crane is claimed the tower machine again, is the most frequently used main haulage conveyor tool of a kind of building operation.The tower machine is high with body of the tower, arm long, lift characteristics such as weight is big, wide coverage, work efficiency height and be widely used in building fields such as material transportation, loading and unloading.Also there is very big potential safety hazard in the performance of tower machine operation simultaneously efficiently, and serious accident happens occasionally.Tower machine working environment usually can be very abominable, for example: 1. operation in inclement weathers such as high wind, thick fog, snow, heavy rain; 2. for increasing work efficiency, many tower machine closely cross-operation at same scene, a tower group of planes is easy to take place mutual collision; 3. the tower machine works in complicated surrounding environment; Like places such as surrounding buildings thing, high voltage transmission line, vital communication lines, densely populated square, school, hospitals; This type zone must be laid special stress on protecting, and forbids that load passes through from the top, otherwise; Accident such as in case the collision of tower machine, falling object from high altitude take place and tumble, consequence is with hardly imaginable.
Early stage tower machine is controlled main dependence driver's experience and the sense of motion of estimating the control tower machine.More advanced tower machine has been installed load lifting limiter, limiter of moment, amplitude limiter etc.; But these sensors all are when hypervelocity, overload, to cut off the electricity supply; Suddenly shutdown is very big to the impact of tower machine, can directly damage the mechanical strength of tower machine, and causes the weight tenesmus.
In the tower machine operation, have an accident; People have designed various collision avoidance systems; For example application number is the safety intelligent detecting instrument that 200610041832.3 Chinese invention patent application discloses the operation of a kind of tower crane flock-mate fork, and this instrument has a many locking terminals equipment and a tread controller to constitute, and the tower crane crowd carries out communication through 485 buses; Final terminal is arranged on every operation tower crane, and possibly collide between the tower crane crowd reported to the police.These existing tower machine collision avoidance system are mostly based on passive type anticollision security model, and system only monitors the state of kinematic motion of self and the situation of peripheral obstacle is known nothing, thereby pre-alerting ability is relatively poor.
In view of there is the relatively poor problem of pre-alerting ability in the passive type collision avoidance system; Application number is that 200910022444.4 Chinese invention patent application discloses a kind of tower machine anticollision forewarn system based on ultrasonic sensing network; This system surveys tower machine peripheral obstacle through sonac; Location and identification, trajectory predictions and existing diagram data Model Calculation ultrasonically break the barriers; Obtain tower machine anti-collision warning information, possible collision status is in time notified tower machine driver, belongs to initiatively collision avoidance system.Though sonac has been successfully applied in the reversing automobile collision avoidance system; But tower machine mode of operation and environment and automobile differ greatly; And super sonic can be found range big from short (the best find range only 4-5 rice), temperature influence; In the actual condition of tower machine operation, be difficult to realize precise dynamic range finding and location, the possibility of successful Application is very low.
The utility model content
The utility model aims to provide a kind of tower crane monitoring early warning and safety device; With the distance between other tower crane or the obstacle in the real time position that can obtain tower crane in time, exactly and movable information and it and the operating environment, early warning signal is provided to the driver.
The utility model tower crane monitoring early warning and safety device comprises the master control module; And the memory module and the alarm module that are connected in the master control module; Said master control module also connects a GPS module, the 2nd GPS module and RFID (RF identification) read write line; The one GPS module and the 2nd GPS module are installed on respectively on the body of the tower and tower arm of said tower crane; Said tower crane also is provided with the RFID label, and said rfid interrogator is used for characteristic information with said tower crane and writes said RFID label and be used to read RFID label on other tower crane of operating environment or the obstacle to obtain the characteristic information of corresponding tower crane or obstacle.
Preferably, said master control module also connects communication module, is used for communicating by letter with ground-surface monitoring and control centre.
Preferably, said characteristic information comprises numbering, the information acquisition time of tower crane, current location, running velocity and the service direction of tower arm.
Preferably, said characteristic information also comprises the real-time distance between other tower crane tower arm in tower arm and the operating environment of tower crane.
Preferably, said master control module also connects display module.
Preferably; Also comprise map memory cell and image co-registration module; Said map memory cell is used to store the operating environment GPS electronic chart of tower crane, and said image co-registration module is used for the current location of the tower arm of each tower crane and said GPS electronic chart are merged.
Preferably, said master control module also connects
Air velocity transducer is used to gather the operating air velocity of tower crane; And/or
Limiter of moment is used to limit the moment of tower crane, and said characteristic information also comprises the state of tower crane limiter of moment; And/or
The degreeof turn sensor is used to gather the degreeof turn of tower crane; And/or
Height sensor is used to gather the height of the suspension hook of tower crane; And/or
Electric machine control and driver module;
Said characteristic information also comprises the state of tower crane limiter of moment, the degreeof turn of tower crane and/or the height of suspension hook.
The utility model also provides a kind of safety monitoring system, and this system comprises:
Monitoring and control centre; With
At least two monitoring early warning and safety devices; Correspondence is arranged on two tower cranes at least; And be connected with said monitoring and control centre through communication module; Each monitoring early warning and safety device comprises the master control module; And the memory module and the alarm module that are connected in the master control module, said master control module also connects a GPS module, the 2nd GPS module and rfid interrogator, and a GPS module and the 2nd GPS module are installed on respectively on the body of the tower and tower arm of said tower crane; Said tower crane also is provided with the RFID label, and said rfid interrogator is used for characteristic information with said tower crane and writes said RFID label and be used to read RFID label on other tower crane of operating environment or the obstacle to obtain the characteristic information of corresponding tower crane or obstacle.
Preferably, said master control module also connects display module.
Preferably; Each monitoring early warning and safety device also comprises map memory cell and image co-registration module; Said map memory cell is used to store the operating environment GPS electronic chart of tower crane, and said image co-registration module is used for the current location of the tower arm of each tower crane and said GPS electronic chart are merged.
The utility model adopts two GPS modules to realize location and distance detecting; Can obtain the distance between other tower crane in real time position and movable information and it and the operating environment of tower crane or the obstacle in time, exactly; To the driver early warning signal is provided; Belong to active anticollision, and the correlativity position error has been eliminated, the accuracy of positioning height in two GPS module location.Its utilization RFID technology realizes transmission of Information between the tower crane simultaneously, and the storage that can accomplish the high capacity work data reaches mutually and passes, and real-time is good, and cost is low, and is easy to realize.
Among some embodiment of the utility model with the current location of the tower arm of each tower crane and operating environment GPS electronic chart merge show after; Can the real-time condition of operation field be provided intuitively to the driver through telltale, thereby can alleviate driver's homework burden.
Tower machine master control module is except that reading the GPS locating information among some embodiment of the utility model; Also read the value of existing safety sensor; Not only can realize anti-collision early warning, and can understand the job status and the safety case of other tower crane, thereby can realize safety guard-safeguard better.
Description of drawings
Fig. 1 is the functional block diagram of the tower crane monitoring early warning and safety device among some embodiment of the utility model.
Fig. 2 is the tower group of planes monitoring early warning and safety scheme drawing of the tower crane monitoring early warning and safety device among some embodiment of the utility model.
Fig. 3 is the functional block diagram of the tower crane monitoring early warning and safety device among other embodiment of the utility model.
The specific embodiment
For making those skilled in the art more be expressly understood the utility model, do more detailed explanation below in conjunction with accompanying drawing, but these explanations are not limited to the protection domain of the utility model.
With reference to Fig. 1; Present embodiment tower crane monitoring early warning and safety device comprises master control module 1, and the GPS module 2, the 2nd GPS module 3, rfid interrogator 4, feed circuit 5, memory module 6, display module 7, alarm module 8 and the GPRS module 9 that are connected in master control module 1.Said monitoring early warning and safety device also comprises the RFID label, and the RFID label is arranged on the tower crane, is used for cooperating with rfid interrogator, realizes transmission of Information between the tower crane.
The one GPS module 2 and the 2nd GPS module 3 are installed on respectively on the body of the tower and tower arm of tower crane, and they observe identical satellite simultaneously, ask poor through 1 pair of observed value of master control module then, eliminate the correlativity error with this, improve accuracy of positioning.The positioning principle of GPS module is a common practise, does not do narration here.Utilize the time difference of twice location of priority and the location information of acquisition,, can calculate the kinematic velocity and the sense of motion of tower arm in conjunction with the path of motion of tower crane tower arm.And utilize the location information of two tower crane tower arms that GPS location obtains, can calculate real-time distance between these two tower crane tower arms (promptly at a time distance).The one GPS module 2 and the 2nd GPS module 3 include GPS module bodies and antenna.Above-mentioned these calculating can realize in master control module 1, also can realize in a GPS module therein.Among some embodiment, also can adopt the operational method of existing differential GPS, utilize a GPS module 2 and the 2nd GPS module 3 to realize accurately location.
Feed circuit 5 are the common practise of this area with memory module 6.Display module 7 preferred LCD display modules, in certain embodiments, display module 7 can show the peripheral obstacle information such as distance, position and speed of (comprising other tower crane).In some embodiments, display module 7 can also show the security information such as moment values, lift heavy, amplitude, wind speed and height under hook of tower crane.In some embodiments, display module 7 can also show the electronic chart of operating environment.Alarm module 8 can adopt various type of alarms such as audio alert, alarm bell warning, signal lamp warning.
GPRS module 9 is used for communicating by letter with ground-surface monitoring and control centre.Can realize communicating by letter with each tower crane of operation field easily through this mode ground monitoring center, realize centralized monitoring and scheduling the tower crane crowd.It will be appreciated by those skilled in the art that; Adopting GPRS module 9 to communicate by letter with ground-surface monitoring and control centre is a kind of preferred implementation of the utility model; Also can adopt other communication module realization tower crane to communicate by letter, comprise and adopt wired mode or other communication of the prior art with ground-surface monitoring and control centre.
Master control module 1 is according to the information of a GPS module 2 and the 2nd GPS module 3; Obtain the information such as position, kinematic velocity, sense of motion of the tower arm of this tower crane; Simultaneously obtain the information such as position, kinematic velocity, sense of motion of the tower arm of other tower crane in the operating environment and the information of obstacle according to rfid interrogator 4; Judge the safe condition that tower crane is following; And through the various monitor datas of display module 7 demonstrations, control alarm module 8 sends alerting signal when reaching early warning range.Among some embodiment, master control module 1 can be controlled the tower machine according to the safe condition of tower machine, for example can slow down or shutdown to the tower machine.Among some embodiment, master control module 1 can adopt ARM, DSP or common MCU chip.Among some embodiment, master control module 1 can adopt CAN bus, 485 buses or serial ports type of transmission and some modules to realize data communication.
Among some embodiment, comprise numbering, the information acquisition time of tower crane, current location, running velocity and the service direction of tower arm through the characteristic information of RFID technical transmission.And in certain embodiments, characteristic information further comprises the real-time distance between other tower crane tower arm in tower arm and the operating environment of tower crane.In certain embodiments; Characteristic information also can comprise some security parameters that existing monitored control system adopts, as: the height of the state of tower crane limiter of moment, the degreeof turn of tower crane, operating radius, tower crane suspension hook, the operating air velocity of tower crane etc.
In some better embodiment; Also comprise map memory cell and image co-registration module; The map memory cell is used to store the operating environment GPS electronic chart of tower crane, and the image co-registration module is used for the current location of the tower arm of each tower crane and GPS electronic chart are merged and pass through display module 7 demonstrations.Operating environment GPS electronic chart can make in the following manner: before the operation, along the walking of safety guard-safeguard zone, survey and draw out the electronic chart in the forbidden zone of tower machine at the operation field hand held GPS receiver.The electronic chart of some embodiment can adopt tower group of planes monitoring early warning and safety scheme drawing as shown in Figure 2,100 expression monitoring early warning and safety devices among the figure, 200 expression cross-operation districts, 300 expression safety guard-safeguard zone, the i.e. forbidden zones of tower machine.The current location of tower arm and GPS electronic chart merge show after, through display module 7 the can visually see position and the state of kinematic motion (comprising kinematic velocity and direction) of tower arm, understand the tower arm of each tower machine and the distance in forbidden zone.Be provided with a said monitoring early warning and safety device on each tower crane, realize control and monitoring tower crane.
With reference to Fig. 3; In the tower crane monitoring early warning and safety device of other embodiment; Master control module 1 not only is connected with a GPS module 2, the 2nd GPS module 3, rfid interrogator 4, feed circuit 5, memory module 6, display module 7, alarm module 8 and GPRS module 9; Also be connected with air velocity transducer 10, limiter of moment 11, degreeof turn sensor 12 and height sensor 13, be respectively applied for the elevation information of operating air velocity, moment, degreeof turn and the suspension hook of gathering tower crane.Also comprise electric machine control and driver module 14, be used for the tower machine being controlled, the tower machine is slowed down or shutdown according to the safe condition of tower machine.It will be appreciated by those skilled in the art that; In some embodiments; Can include only any one or two kinds or three kinds in air velocity transducer 10, limiter of moment 11, degreeof turn sensor 12 and the height sensor 13, also can comprise more security monitoring sensor.
Monitoring early warning and safety device on every tower machine is connected with monitoring and control centre through its communication module, has promptly constituted a safety monitoring system, and monitoring and control centre can be communicated by letter with every tower machine realization of operation field easily, and realization is to the centralized monitoring and the scheduling of a tower group of planes.
Be appreciated that some technical schemes of the utility model have following technique effect at least:
1, adopt two GPS modules to realize accurately location and range finding, adopt the RFID technology to realize information transfer between the tower machine, adopt GPRS to realize tower machine and ground communication, cost is low, realizes easily;
2, the two GPS of utilization eliminate the correlativity position error, have improved system accuracy, reach the accuracy of positioning of DGPS (differential GPS);
3, earlier with GPS mapping protection zone electronic chart, be stored in the master control module, help setting up true and reliable protection zone security model;
4, utilization RFID technology realizes information transfer between the tower machine; A difficult problem that has solved the storage of high capacity work data and passed mutually can pass each parameter information in the tower machine (for example: tower machine numbering, operating personal, work-hours, tower machine orientation, running velocity, distance) between each tower machine mutually;
5, master control module also reads the value of existing safety sensor except that reading the GPS locating information, solved a difficult problem crashproof, the safety zone protection.
The above only is the preferred implementation of the utility model, and the protection domain of the utility model also not only is confined to the foregoing description, and all technical schemes that belongs under the utility model thinking all belong to the protection domain of the utility model.Should be pointed out that for those skilled in the art in the some improvement and the retouching that do not break away under the utility model principle prerequisite, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (8)
1. tower crane monitoring early warning and safety device; Comprise the master control module; And the memory module and the alarm module that are connected in the master control module; It is characterized in that: said master control module also connects a GPS module, the 2nd GPS module and rfid interrogator; The one GPS module and the 2nd GPS module are installed on respectively on the body of the tower and tower arm of said tower crane; Said tower crane also is provided with the RFID label, and said rfid interrogator is used for characteristic information with said tower crane and writes said RFID label and be used to read RFID label on other tower crane of operating environment or the obstacle to obtain the characteristic information of corresponding tower crane or obstacle.
2. tower crane monitoring early warning and safety device according to claim 1 is characterized in that: said master control module also connects communication module, is used for communicating by letter with ground-surface monitoring and control centre.
3. tower crane monitoring early warning and safety device according to claim 1 is characterized in that: said master control module also connects display module.
4. tower crane monitoring early warning and safety device according to claim 1; It is characterized in that: also comprise map memory cell and image co-registration module; Said map memory cell is used to store the operating environment GPS electronic chart of tower crane, and said image co-registration module is used for the current location of the tower arm of each tower crane and said GPS electronic chart are merged.
5. tower crane monitoring early warning and safety device according to claim 1 is characterized in that: said master control module also connects
Air velocity transducer is used to gather the operating air velocity of tower crane; And/or
Limiter of moment is used to limit the moment of tower crane, and said characteristic information also comprises the state of tower crane limiter of moment; And/or
The degreeof turn sensor is used to gather the degreeof turn of tower crane; And/or
Height sensor is used to gather the height of the suspension hook of tower crane; And/or
Electric machine control and driver module;
Said characteristic information also comprises the state of tower crane limiter of moment, the degreeof turn of tower crane and/or the height of suspension hook.
6. safety monitoring system is characterized in that comprising:
Monitoring and control centre; With
At least two monitoring early warning and safety devices; Correspondence is arranged on two tower cranes at least; And be connected with said monitoring and control centre through communication module; Each monitoring early warning and safety device comprises the master control module; And the memory module and the alarm module that are connected in the master control module, said master control module also connects a GPS module, the 2nd GPS module and rfid interrogator, and a GPS module and the 2nd GPS module are installed on respectively on the body of the tower and tower arm of said tower crane; Said tower crane also is provided with the RFID label, and said rfid interrogator is used for characteristic information with said tower crane and writes said RFID label and be used to read RFID label on other tower crane of operating environment or the obstacle to obtain the characteristic information of corresponding tower crane or obstacle.
7. control system according to claim 6 is characterized in that: said master control module also connects display module.
8. control system according to claim 6; It is characterized in that: each monitoring early warning and safety device also comprises map memory cell and image co-registration module; Said map memory cell is used to store the operating environment GPS electronic chart of tower crane, and said image co-registration module is used for the current location of the tower arm of each tower crane and said GPS electronic chart are merged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011204558343U CN202369306U (en) | 2011-11-17 | 2011-11-17 | Safety monitoring and early warning device and safety monitoring system for tower crane |
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| CN2011204558343U CN202369306U (en) | 2011-11-17 | 2011-11-17 | Safety monitoring and early warning device and safety monitoring system for tower crane |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102963827A (en) * | 2012-11-02 | 2013-03-13 | 宜昌市创星电子技术发展有限公司 | Tower crane safety management system |
| CN104058343A (en) * | 2014-06-10 | 2014-09-24 | 山东瑞鲁机电设备有限公司 | Tower crane safety monitoring system and monitoring method |
| CN104176642A (en) * | 2014-08-01 | 2014-12-03 | 青岛盛嘉信息科技有限公司 | Control system of tower crane |
| CN104210947A (en) * | 2014-08-01 | 2014-12-17 | 青岛盛嘉信息科技有限公司 | Remote control circuit of tower crane |
| CN104408489A (en) * | 2014-11-05 | 2015-03-11 | 武汉钢铁(集团)公司 | Large tank positioning system |
| CN104486801A (en) * | 2014-11-20 | 2015-04-01 | 中南大学 | Method and system for wireless information interaction between tower cranes capable of adjusting speed based on demand |
| CN104891357A (en) * | 2015-06-08 | 2015-09-09 | 中国人民解放军空军工程大学 | Lifting operation auxiliary system |
| CN105321225A (en) * | 2014-07-29 | 2016-02-10 | 上海睿技土木工程咨询有限公司 | Management instrument for installation and maintenance of engineering machinery and application of management instrument |
| CN106946159A (en) * | 2017-03-30 | 2017-07-14 | 武汉大学 | One kind is based on the pinpoint building tower crane automatic running systems of the Big Dipper/GPS and control method |
| CN106986269A (en) * | 2017-05-03 | 2017-07-28 | 承德益远科技有限公司 | A kind of device and method of bridge crane automatic positioning weighting metering |
| CN107170187A (en) * | 2017-06-05 | 2017-09-15 | 重庆大学 | High-tension electricity equipment availability vehicle location early warning system and method |
| CN107473109A (en) * | 2017-08-23 | 2017-12-15 | 廊坊中建机械有限公司 | Tower crane collision-proof method and system |
| TWI650282B (en) * | 2017-06-02 | 2019-02-11 | 國立高雄科技大學 | Security detection system |
| CN112652153A (en) * | 2020-12-24 | 2021-04-13 | 国网河南省电力公司南阳供电公司 | Alarm system for preventing construction machinery from mistakenly touching power transmission line |
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2011
- 2011-11-17 CN CN2011204558343U patent/CN202369306U/en not_active Expired - Lifetime
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102963827B (en) * | 2012-11-02 | 2015-07-01 | 宜昌市创星电子技术发展有限公司 | Tower crane safety management system |
| CN102963827A (en) * | 2012-11-02 | 2013-03-13 | 宜昌市创星电子技术发展有限公司 | Tower crane safety management system |
| CN104058343A (en) * | 2014-06-10 | 2014-09-24 | 山东瑞鲁机电设备有限公司 | Tower crane safety monitoring system and monitoring method |
| CN104058343B (en) * | 2014-06-10 | 2016-05-11 | 山东瑞鲁机电设备有限公司 | A kind of tower crane safety monitoring system and method for supervising |
| CN105321225A (en) * | 2014-07-29 | 2016-02-10 | 上海睿技土木工程咨询有限公司 | Management instrument for installation and maintenance of engineering machinery and application of management instrument |
| CN104176642A (en) * | 2014-08-01 | 2014-12-03 | 青岛盛嘉信息科技有限公司 | Control system of tower crane |
| CN104210947A (en) * | 2014-08-01 | 2014-12-17 | 青岛盛嘉信息科技有限公司 | Remote control circuit of tower crane |
| CN104408489A (en) * | 2014-11-05 | 2015-03-11 | 武汉钢铁(集团)公司 | Large tank positioning system |
| CN104486801B (en) * | 2014-11-20 | 2018-03-13 | 中南大学 | Wireless information interaction method and system between the tower crane that communication speed adjusts on demand |
| CN104486801A (en) * | 2014-11-20 | 2015-04-01 | 中南大学 | Method and system for wireless information interaction between tower cranes capable of adjusting speed based on demand |
| CN104891357B (en) * | 2015-06-08 | 2018-07-10 | 中国人民解放军空军工程大学 | lifting operation auxiliary system |
| CN104891357A (en) * | 2015-06-08 | 2015-09-09 | 中国人民解放军空军工程大学 | Lifting operation auxiliary system |
| CN106946159A (en) * | 2017-03-30 | 2017-07-14 | 武汉大学 | One kind is based on the pinpoint building tower crane automatic running systems of the Big Dipper/GPS and control method |
| CN106986269A (en) * | 2017-05-03 | 2017-07-28 | 承德益远科技有限公司 | A kind of device and method of bridge crane automatic positioning weighting metering |
| CN106986269B (en) * | 2017-05-03 | 2019-02-22 | 承德益远科技有限公司 | A kind of device and method of bridge crane automatic positioning weighting metering |
| TWI650282B (en) * | 2017-06-02 | 2019-02-11 | 國立高雄科技大學 | Security detection system |
| CN107170187A (en) * | 2017-06-05 | 2017-09-15 | 重庆大学 | High-tension electricity equipment availability vehicle location early warning system and method |
| CN107473109A (en) * | 2017-08-23 | 2017-12-15 | 廊坊中建机械有限公司 | Tower crane collision-proof method and system |
| CN107473109B (en) * | 2017-08-23 | 2019-02-01 | 廊坊中建机械有限公司 | Tower crane collision-proof method and system |
| CN112652153A (en) * | 2020-12-24 | 2021-04-13 | 国网河南省电力公司南阳供电公司 | Alarm system for preventing construction machinery from mistakenly touching power transmission line |
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