CN101976489A - Laser-vision linked night invasion detection device - Google Patents
Laser-vision linked night invasion detection device Download PDFInfo
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- CN101976489A CN101976489A CN2010105073496A CN201010507349A CN101976489A CN 101976489 A CN101976489 A CN 101976489A CN 2010105073496 A CN2010105073496 A CN 2010105073496A CN 201010507349 A CN201010507349 A CN 201010507349A CN 101976489 A CN101976489 A CN 101976489A
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Abstract
The invention discloses a laser-vision linked night invasion detection device, which realizes the detection and identification of invasion events by laser detection and active vision technology at night. The invention relates to invasion detection technology in security protection, in particular to optoelectronic and visual information processing technology-based invasion detection. The technical problems needing to be solved are to detect and identify the invasion events of pedestrians or vehicles in an environment with poor light at night, and prevent false alarms. In the device, a modulated laser beam is used as a detection light source and is matched with a photoelectric signal collector, a photoelectric signal amplifier and a photoelectric signal processor to form a front-end unit; and a camera provided with active illumination and an embedded image processor are used as a rear-end response processing unit. When the invasion events occur in a detection area, a laser photoelectric signal is interrupted to trigger an active vision system so as to realize linkage and improve the reliability of the invasion detection. The laser-vision linked night invasion detection device can be used for anti-invasion security detection around residential areas, storerooms, airports and other important places.
Description
Technical field
The invention belongs to photoelectricity and visual information technical field, relate to pedestrian and vehicle intrusion detection device in the place circumference security protection at a kind of night, particularly based on the intrusion detection of laser photoelectricity and visual information technology.
Background technology
For important places such as residential quarter, storehouse, military area, airports, the intrusion detection of pedestrian and vehicle has become an important process of safety guard.When warning region met accident invasion, safety-protection system needed to survey rapidly, responds and the identification intrusion event, and reports to the police, to take further measures support area safety.Especially for the situation at night, visibility descends, and light sources such as peripheral path car light cause illumination to disturb, and visual surveillance is brought very big challenge.For the anti-illegal-inbreak incident, reduce the intensity of artificial security work, invasion detecting device is especially necessary automatically.At present perimeter detection and the warning system of using in the world mainly contains based on following several technology: microwave, infrared, reveal cable, optical fiber, pulsed electron fence, visual surveillance and laser photoelectricity induction etc.These perimeter detection technology respectively have characteristics, according to principle of work and mode, can be divided into physical protection type and active probe type etc.
Pulsed electron safe fence system is an a kind of representational physical protection system, is made up of the electronic cable of charged pulse, is arranged in the regional circumference that needs protection.The non-fatal high voltage pulse that electronic cable produces can effectively be beaten back the invador, and produces alerting signal.The major defect of electronic security(ELSEC) fence is to involve great expense.
The systematic comparison of active probe type is many, and the sniffer induction intrusion event of this class by arranging in advance produces and report to the police.
Microwave wall formula warning system is divided into microwave transmitter unit and microwave receiving unit two parts and forms, and transmitter and receiver separates relative thirty years of age and forms a stable microwave field therebetween, utilizes an interference principle or the beam break formula principle person that comes the detecting intrusion.In case have the people to swarm into the security area, microwave field is interfered, microwave receiver will detect a kind of abnormal information, thereby reports to the police.
The active infrared warning system is made up of infrared transmitter and receiver two parts, sends alerting signal between object blocking-up and infrared receiving set during light path.The active infrared warning system mainly is applicable to indoor in-plant intrusion detection.Another kind of passive infrared invasion detection method is realized reporting to the police by detecting the target body radiation.The subject matter that exists is that the human body radiation electromagnetic energy is to change relatively, brings result of detection deviation to occur and detection speed waits problem slowly.
Revealing cable is a kind of concentric cable with special construction, and the space between the transmitting-receiving cable forms the detecting area of an oval-shaped electromagnetic field.When the people enters this detecting area, can disturb this coupled field, the electromagnetic wave energy that the reception cable is received changes, and triggers by electronic circuit and reports to the police.
The infrared light of Fibre Optical Sensor perimeter alarm system transponder pulse modulation when the invador invades, can destroy optical fiber, makes its fracture, at this moment will trigger warning because of the interruption of light signal.
Visual surveillance adopts video camera to take the realtime graphic of monitor area, judges whether the zone abnormal conditions occur.The advantage of visual surveillance is an abundant information, can be used as final differentiation means in safety-protection system region security information is provided.There is following shortcoming in visual surveillance: the one, and the video data volume is huge, and multi-channel video makes the artificial vision monitor work fatigue, misses intrusion event easily; The massive video data of being stored makes processing, the retrieval work difficulty relatively of video data.If adopt computer vision technique to realize identification automatically and processing, then be subjected to existing technology and limit, the rate of false alarm of system and rate of failing to report are difficult to the effect that reaches satisfied than higher.Another aspect is influenced by lighting condition, for illumination poor environments such as nights, initiatively lighting engineering is with Enhanced Imaging although can use infrared lamp etc., and the vision monitoring quality still is subjected to the influence of the photoenvironment at night inevitably, and the visual surveillance effect is not ideal enough.Simultaneously, adopt the infrared lamp illumination to make guarded region expose easily, thereby the invador can get around surveillance zone, cause security protection to lose efficacy.Flashlamp cooperates video camera can take the image of better quality, but is not suitable for long-time steady operation.
The laser projections optoelectronic induction is reported to the police and is belonged to initiatively intrusion detector class, and the directed laser beam directive receiving end by generating laser is launched converts the light signal that receives to characteristic signal at receiver by photoelectric device, and through handling.When light beam was interdicted, then signal was not normal, produced alerting signal.The advantage of laser photoelectricity induction alarm is highly sensitive, and the ability of anti-extraneous parasitic light and electromagnetic interference (EMI) is strong, is suitable for telecommute.Its shortcoming is that system is difficult to differentiate the laser signal that objects such as toy, leaf cause and blocks situation, and system's rate of false alarm is higher.
Comprehensive above perimeter intrusion detecting technology, existing monotechnics existence involves great expense, the problem of difficult arrangement (pulsed electron fence, leakage cable, optical fiber type, microwave type), perhaps environment for use limited (infrared type), or, detection reliability not high (visual surveillance) responsive to the ambient lighting variation, or system's rate of false alarm higher (laser photoelectricity induction), be difficult to realize low cost, high sensitivity, hang down the Intrusion Detection Alarm of rate of false alarm.
Summary of the invention
The objective of the invention is to overcome the interference of bad illumination conditions such as night, provide a kind of and can detect the intrusion event of pedestrian or vehicle and the warning device of discerning reliably in order to overcome the deficiency of existing intruder detection system.This warning device can be by multiple detection and supervision means, and the intrusion event of perception control area also produces alarm.
For achieving the above object, technical solution of the present invention is, laser photoelectricity Detection Techniques and vision monitoring technology are combined, and overcomes the interference of bad photoenvironment at night, and the intrusion detection and the warning device of many sensings means interlock is provided.By the projecting laser bundle, and dispose corresponding optoelectronic induction unit, survey the suspicious intrusion event in the warning region; Trigger the visual surveillance system by the laser acquisition alarm signal, cooperate the floodlighting means, the image information of shooting, collecting alarm region is handled and is judged identification, further confirms warning message, provides the safe condition and the reference picture in security protection zone automatically.
The Intrusion Detection Alarm device of described laser acquisition and visual surveillance interlock comprises the front end probe unit based on the laser photoelectricity induction, and vision collecting is handled backend unit, and and monitor management host computer formation.
Described intrusion detection device, its laser acquisition front end unit comprise laser emitting module and laser photoelectricity conversion receiving processing module composition.
Described intrusion detection device, the laser process of its laser emitting module projection are with the characteristic frequency modulation, and optical maser wavelength can require to select according to installation environment.The setting angle of generating laser provides the adjustment of pitching and two degree of freedom of deflection by attitude-adjusting system, to realize aligning of transmitting terminal and receiving end.
Described intrusion detection device, its laser photoelectricity conversion receiving processing module is by the sunscreen protection device and the optical concentration device of front end, and the conversion of photosignal, amplification, demodulation, processing and identification integrated circuit board are formed.
Described laser photoelectricity is surveyed front end unit, and its transmitting terminal is installed on the different substations with receiving end and uses in pairs.
Described intrusion detection device, its vision collecting are handled backend unit and are comprised security protection surveillance camera, embedded image processing module, flip flop equipment and active lighting device composition.
Described vision collecting is handled backend unit, and the embedded image processing module is that video acquisition, decoding, processing and the peripheral interface of core formed by TMS320DM642.
Described monitor management host computer is realized warning message management, the storage administration of sound and light alarm and image scene by PC.
The technical solution adopted for the present invention to solve the technical problems is: laser acquisition and intrusion detection and the warning of visual surveillance interlock to realize many sensings means.With the modulation laser beam as probe source, receive and processing module composition front end unit with the laser photoelectricity conversion, the warning region circumference is surveyed and blocked, when pedestrian, vehicle, toy and other objects block laser optical path through circumference, produce elementary alarm signal; The video camera and the embedded image processor that have initiatively illumination respond processing unit as the rear end active vision.The elementary alarm signal of front end unit triggers the visual surveillance system and realizes interlock, under controlled fully lighting condition, gather the image of suspicious alarm region, carry out embedded image and handle, further confirm and discern intrusion target, realize Intrusion Detection Alarm highly sensitive, high reliability.
The invention has the beneficial effects as follows:
(1) because laser photoelectricity detection method antijamming capability is strong, can under night bad photoenvironment, survey the intrusion event that laser optical path that a variety of causes causes interrupts, highly sensitive;
(2) the rear end visual surveillance function that provides abundant scene information can be provided;
(3) the visual surveillance function can further be handled scene information, the identification alert event, and many sensings means have reduced the false alarm of laser acquisition effectively.
(4) because the front end laser acquisition unit of system is a continuously-running duty, visual surveillance unit, rear end is the triggered response working method, so visual surveillance is a service intermittent, can adopt extreme lighting means such as high-power flashlamp that ambient lighting is controlled, the captured picture quality height that obtains, the Vision information processing reliable results.
(5) because vision system adopts elementary warning to trigger step working method, but not the continuous videos shooting, the image data amount that obtains reduces relatively, is convenient to storage, retrieval and manually checks inspection afterwards.
Description of drawings
Fig. 1 is the whole composition diagram of Intrusion Detection Alarm device of the present invention;
Fig. 2 is an Intrusion Detection Alarm device workflow diagram;
Fig. 3 is the fundamental diagram of laser photoelectricity signal receiving processing module.
Embodiment
The Intrusion Detection Alarm apparatus structure of laser acquisition and visual surveillance interlock sees also Fig. 1.
The Intrusion Detection Alarm device is by the laser photoelectricity probe unit, and visual surveillance unit and supervision host computer constitute.The laser acquisition unit places the warning region border, installs relatively in twos, surveys the intrusion event of zone line.Laser acquisition unit and visual surveillance unit electrically connect by composite cable, monitor that host computer and laser photoelectricity probe unit electrically connect.
Intrusion Detection Alarm device workflow sees also Fig. 2.
Intrusion Detection Alarm device workflow is as follows: when the laser acquisition unit detects when going out a unusual target in the monitor area, produce elementary alerting signal.Owing to cause that the unusual situation of laser acquisition is more, comprise vehicle, pedestrian, toy, fallen leaves etc. cause false alarm easily.In order to improve the reliability of warning, the elementary alerting signal of laser acquisition unit is sent to the visual surveillance system, triggers video camera and take high quality graphic under active flash illumination condition.Captured image carries out embedded processing, compares with predefined scene image and mates.When processing result image confirms that there is intrusion event in the warning place, alerting signal and image are sent to host computer, and trigger sound and light alarm; When processing result image is confirmed the not unusual invasion in warning place, send reset signal, scene image is sent to host computer checks treating afterwards, do not trigger alarm to the laser acquisition unit.
The workflow principle of laser pick-off processing module as shown in Figure 3.
The detection substation (6) that comprises paired use of laser photoelectricity probe unit is installed Laser emission end and receiving terminal on each substation, substation is installed in twos relatively, is fixed in ground.Transmitting terminal is by generating laser (7) projecting laser bundle (12), directive photoelectricity receiving end.The generating laser model is an EL98D60IG2 point type laser instrument, and the projection wavelength is the near-infrared laser of 980nm.Near-infrared laser has good through characteristic in atmosphere, reduce signal attenuation; And has certain disguise owing to human eye is invisible.The laser beam that laser instrument sends is through modulation in advance, and modulating frequency is 1kHz.Laser instrument is installed on the two degrees of freedom attitude-adjusting system (8), can provide ± 15 pitching of spending and the adjustment of deflection attitude.Aspect the calibration of laser beam, adopt infrared aligning test chart (microampere meter) and laser positioning instrument to come collimated laser beam.Calculate and experimental verification through laser intensity, for 10 meters detection range, Laser emission power is the requirement that 1mw can satisfy receiving terminal optoelectronic induction device illumination intensity value (1000LX).
The laser pick-off end converts the light signal that receives to characteristic signal by photoelectric device, and handles.Receiving end is installed on the different substations relatively with transmitting terminal.The receiving orifice top of receiving end is covered by light shield (9), to block source of stray light, alleviates interference.On the light path of the front of receiving end, place convex lens (10) and receive light, improve intensity of illumination to assemble.Thereafter be narrow band pass filter (11), its center is consistent with the laser frequency of generating laser by frequency.By convex lens and optical filter, further reduce the interference of parasitic light, improve the light intensity and the signal to noise ratio (S/N ratio) of receiving end laser beam.
The installation site of Laser emission end that uses and receiving end is as follows in pairs: the exploring laser light bundle ground height that is positioned at bottom is about 0.3 meter; About 1 meter of the laser beam that is positioned at the upper strata apart from ground.Require strict more situation for security protection, can increase the number of Laser emission and receptacle, the feasible exploring laser light bundle of forming is crypto set more, and is responsive more to intrusion detection.
The optoelectronic induction device of laser pick-off end is selected 2CU501 type silicon photoelectric diode, and its characteristic is: under the 1000LX intensity of illumination, and response time t＜20ns, photocurrent I＞15uA.Receiving end is formed Photoelectric Signal Processing module (4) with devices such as silicon photoelectric diode sensing device and 89C51 single-chip microcomputers.In the Photoelectric Signal Processing module, realize that by silicon photoelectric diode laser signal transforms into electric signal, through operation amplifier circuit the signal of gathering is carried out processing and amplifying then; Sampled signal enters processor of single chip computer, is realized the filtering and the demodulation process of signal by program software.When barrier was invaded the border, laser beam was interdicted, and then received photosignal and interrupted.In the Photoelectric Signal Processing module Single Chip Microcomputer (SCM) program, when the signal interruption time surpasses the predefined response time (30ms), produce elementary alerting signal.The alerting signal of Photoelectric Signal Processing module will transmit big visual surveillance unit, trigger the video camera photographic images, confirm, discerns intrusion target.
Laser photoelectricity probe unit and visual surveillance unit electrically connect, and tie cable comprises: camera shutter line trigger signal, synchroflash line trigger signal, analog video concentric cable and power supply supply lines.Visual surveillance part is taken the photograph surveillance camera (2), initiatively flare SB-900 (13) and embedded image processing module (5) by security protection, and camera shutter line trigger signal, synchroflash line trigger signal composition.The laser photoelectricity probe unit detects intrusion event and produces elementary alerting signal, and this signal is connected to the security protection video camera as shutter trigger signal after isolating by relay.The normality of video camera is in holding state, receives trigger pip, promptly exposes according to predefined shutter, focal length, aperture and light sensitivity.Meanwhile, flashlamp (13) glistens by trigger pip.Owing to adopted high-power flashlamp, the interference that ambient lighting changes has been weakened greatly, can take high-quality image according to preset parameters.One group of typical case's acquisition parameters of video camera is: focal length 12mm, aperture 3.5,1/200 second time shutter, light sensitivity ISO-800.
The vision signal that surveillance camera (2) is taken is sent to DSP embedded graphics processing unit (5) by concentric cable with pal mode.The DSP embedded graphics processing unit places laser photoelectricity to survey substation inside.Analog picture signal carries out sample conversion through decoding chip TVP5150, and digital picture enters the TMS320DM642 processor.
Image processing process is as follows: at first carry out the image pre-service, comprise enhancing, noise reduction and the filtering of image, to improve the quality of image.Because the scene that surveillance camera is taken is fixed, so the background information in image is known image, can take in advance and store.When the laser photoelectricity probe unit sent elementary alerting signal, surveillance camera photographed scene image carried out the image subtraction computing with the image of taking in advance, obtains difference image.If appearance and the object that predefined image is not inconsistent will produce abnormal graph at difference image in the scene.Abnormal graph is carried out the edge segmented extraction, obtain the contour shape of target.Shape and size to target are classified, and the laser acquisition that different reasons such as identification vehicle, pedestrian and toy cause is reported to the police.Judge when image processing module and not invade when unusual that the laser acquisition probe unit is resetted, and the current scene image is sent to management host computer (1), memory image is for verify afterwards.When the pattern of image of cutting apart and vehicles or pedestrians during, system's generation alarm, and be sent to the management host computer to coupling.Host computer and laser photoelectricity probe unit, visual surveillance unit electrically connect, and tie cable comprises: analog video transmission coaxial-cable, alerting signal line and ann reset signal wire.After receiving alerting signal, the management host computer triggers sound and light alarm (3), and storage surveillance camera current images, for verify afterwards.
Claims (9)
1. laser-vision interlock intrusion detection at night device based on laser photoelectricity induction and vision technique, can be surveyed the unusual intrusion event of place circumference at night, go forward side by side line item and sound and light alarm; It is characterized in that: the intrusion detection device adopts laser acquisition and two kinds of sensing technologies of visual surveillance that intrusion event is surveyed and discerned, and the two forms linked system; By laser photoelectricity induction detecting intrusion incident, its response signal is used for triggering the visual surveillance device and takes initiatively lighting condition image scene down synchronously, and then realizes that by Flame Image Process and identification intrusion alarm confirms, realizes sensitivity, intrusion detection reliably.
2. intrusion detection device according to claim 1 is characterized in that, the intrusion detection device comprises laser acquisition unit, visual surveillance unit and upper monitoring computing machine; The laser acquisition unit is elementary detection alarm device, and the visual surveillance unit is the recognition and verification warning device, and the upper monitoring computing machine is handled warning message and storing image data as administrative unit.
3. intrusion detection device according to claim 1 is characterized in that, camera shutter and flashlamp that the elementary alerting signal of laser acquisition unit triggers in the visual surveillance unit are taken synchronously; Confirm that by elementary warning of laser acquisition and visual identity secondary operation is to improve the sensitivity and the reliability of intrusion alarm.
4. intrusion detection device according to claim 1 is characterized in that, the laser acquisition unit is a continuously-running duty, is the triggering intermittent duty in the visual surveillance unit.
5. intrusion detection device according to claim 1 is characterized in that, the laser photoelectricity probe unit is by generating laser, and the optoelectronic induction receiver is formed.
6. laser acquisition according to claim 2 unit is characterized in that, the generating laser of laser acquisition unit is through ovennodulation, and modulating frequency is 1KHz, and optical maser wavelength is 980nm; Generating laser is installed on the two degrees of freedom attitude-adjusting system, can carry out the pitching and the deflection attitude of ± 15 degree scopes and adjust.
7. laser acquisition according to claim 2 unit is characterized in that, the laser acquisition unit the optoelectronic induction receiver front end convex lens and narrow band pass filter are arranged to improve light intensity and the signal to noise ratio (S/N ratio) that receives the illumination signal.
8. laser acquisition according to claim 2 unit, it is characterized in that, the optoelectronic induction receiver of laser acquisition unit carries out the photosignal conversion by silicon photoelectric diode, carries out signal Processing by single chip circuit, judges that the laser optical path that the identification intrusion event causes interrupts.
9. visual surveillance according to claim 2 unit is characterized in that, the image that video camera is taken in the visual surveillance unit is handled by DSP embedded image processing module.
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| CN102708637A (en) * | 2012-06-13 | 2012-10-03 | 上海国际技贸联合有限公司 | Boundary crossing surveillance system |
| CN102819923A (en) * | 2012-08-01 | 2012-12-12 | 苏州中德宏泰电子科技有限公司 | Integrated intelligent perimeter precaution system |
| CN103049974A (en) * | 2013-01-27 | 2013-04-17 | 龚伟明 | Invisible anti-theft alarm device |
| CN103530967A (en) * | 2013-11-03 | 2014-01-22 | 昆山志众欣诚信息技术有限公司 | Security alarm system for residential area |
| CN104978811A (en) * | 2015-06-15 | 2015-10-14 | 苏州工业职业技术学院 | Infrared anti-theft system |
| CN105334872A (en) * | 2014-11-20 | 2016-02-17 | 中国久远高新技术装备公司 | Combined distributed type low-altitude security laser protection system and mounting method thereof |
| CN105551164A (en) * | 2016-02-02 | 2016-05-04 | 苏州中恒普瑞能源互联网科技有限公司 | Laser invasion detection system |
| CN105575021A (en) * | 2016-03-01 | 2016-05-11 | 杨兴文 | Airport runway safety early warning system and airport runway safety early warning method |
| CN106056817A (en) * | 2016-08-10 | 2016-10-26 | 陈盛友 | Decorative-lighting-type invisible laser detector |
| CN106448009A (en) * | 2016-11-07 | 2017-02-22 | 上海锂居信息科技有限公司 | Perimeter intrusion detection system and method |
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| CN110766894A (en) * | 2019-12-25 | 2020-02-07 | 恒大智慧科技有限公司 | Community fence crossing early warning method, system, server and computer storage medium |
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| CN111095370A (en) * | 2017-06-28 | 2020-05-01 | 施耐德电气It公司 | System and method for intrusion detection for rack-mounted chassis |
| CN111815885A (en) * | 2020-07-07 | 2020-10-23 | 中南民族大学 | Intrusion early warning method, equipment, storage medium and device based on Beidou short message |
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| CN102708637A (en) * | 2012-06-13 | 2012-10-03 | 上海国际技贸联合有限公司 | Boundary crossing surveillance system |
| CN102819923A (en) * | 2012-08-01 | 2012-12-12 | 苏州中德宏泰电子科技有限公司 | Integrated intelligent perimeter precaution system |
| CN103049974A (en) * | 2013-01-27 | 2013-04-17 | 龚伟明 | Invisible anti-theft alarm device |
| CN103530967A (en) * | 2013-11-03 | 2014-01-22 | 昆山志众欣诚信息技术有限公司 | Security alarm system for residential area |
| CN105334872A (en) * | 2014-11-20 | 2016-02-17 | 中国久远高新技术装备公司 | Combined distributed type low-altitude security laser protection system and mounting method thereof |
| CN105334872B (en) * | 2014-11-20 | 2018-05-01 | 中国久远高新技术装备公司 | The distributed low latitude security protection lasing safety system of combination and its installation method |
| CN104978811A (en) * | 2015-06-15 | 2015-10-14 | 苏州工业职业技术学院 | Infrared anti-theft system |
| CN105551164A (en) * | 2016-02-02 | 2016-05-04 | 苏州中恒普瑞能源互联网科技有限公司 | Laser invasion detection system |
| CN105575021A (en) * | 2016-03-01 | 2016-05-11 | 杨兴文 | Airport runway safety early warning system and airport runway safety early warning method |
| CN106056817A (en) * | 2016-08-10 | 2016-10-26 | 陈盛友 | Decorative-lighting-type invisible laser detector |
| CN106448009A (en) * | 2016-11-07 | 2017-02-22 | 上海锂居信息科技有限公司 | Perimeter intrusion detection system and method |
| CN106648101A (en) * | 2016-12-23 | 2017-05-10 | 宇龙计算机通信科技(深圳)有限公司 | Virtual reality operation area prompt system, method, device and control terminal |
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| CN106781157A (en) * | 2017-03-29 | 2017-05-31 | 国网山东省电力公司平阴县供电公司 | Anti-theft device for transformer and system |
| CN107426494A (en) * | 2017-05-24 | 2017-12-01 | 国网山东省电力公司龙口市供电公司 | A kind of Intellectualized monitoring identifying system |
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| WO2019056245A1 (en) * | 2017-09-21 | 2019-03-28 | 深圳传音制造有限公司 | Home security method and terminal |
| CN110807886A (en) * | 2019-10-28 | 2020-02-18 | 恒大智慧科技有限公司 | Community security early warning method and system |
| CN110766894A (en) * | 2019-12-25 | 2020-02-07 | 恒大智慧科技有限公司 | Community fence crossing early warning method, system, server and computer storage medium |
| CN111815885A (en) * | 2020-07-07 | 2020-10-23 | 中南民族大学 | Intrusion early warning method, equipment, storage medium and device based on Beidou short message |
| CN113327387A (en) * | 2021-04-16 | 2021-08-31 | 国网山东省电力公司淄博供电公司 | Automatic telescopic security measures rail of transformer substation's removal of reporting to police linkage video monitoring |
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Application publication date: 20110216 |