CN106741003A - A kind of alarm - Google Patents
A kind of alarm Download PDFInfo
- Publication number
- CN106741003A CN106741003A CN201710008197.7A CN201710008197A CN106741003A CN 106741003 A CN106741003 A CN 106741003A CN 201710008197 A CN201710008197 A CN 201710008197A CN 106741003 A CN106741003 A CN 106741003A
- Authority
- CN
- China
- Prior art keywords
- alarm
- signal
- sonac
- circuit
- train
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000013459 approach Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 20
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 14
- 230000003321 amplification Effects 0.000 claims description 12
- 230000008054 signal transmission Effects 0.000 claims description 9
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000002604 ultrasonography Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 238000010010 raising Methods 0.000 description 3
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 210000000707 wrist Anatomy 0.000 description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/06—Control, warning or like safety means along the route or between vehicles or trains for warning men working on the route
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Alarm Systems (AREA)
Abstract
The application provides a kind of alarm, including:For monitoring the sonac of the ultrasonic signal that train on track is approached, for the sonac to be set into fixture on the track and sonac connection, for the ultrasonic signal sent according to the sonac, it is determined that the current processor for thering is train to approach and the alarm signal for receiving the processor transmission, and the signal receiver alarmed according to the alarm signal.Sonac is set in orbit by the alarm that the application is provided by fixture, simple installation is flexible, principle based on ultrasound detection, the ultrasonic signal approached using train on sonac real-time monitoring track, determine that train is approached according to ultrasonic signal by processor, alarmed by signal receiver, simple structure, easy to use, low cost.
Description
Technical field
The application is related to railway security technical field, more particularly to a kind of for perceiving the Portable alarm that train is approached
Instrument.
Background technology
With the development of modern economy, to the degree of dependence more and more higher of railway transportation, input of the country to railway transportation
Also persistently increase, construction of the railway network achieves the development of great-leap-forward, while the requirement to train running speed is also stepped up.
In recent years, China railways experienced six extensive speed-raisings, and raising speed railway has reached 16500 kilometers, continuous in the speed of train
While raising, the amount of starting of train also gradually increases.China railways traffic driving is still based on passenger-cargo co, and train density is high
Rank first in the world.These factors all propose requirement higher to the efficient public security system of train operation, and safety is railway fortune
Defeated eternal theme, in this case, it is ensured that the high speed of train, safety, steady, uninterrupted operation turn into railway efficient transportation
An important mission.
Railway operation rescue bag contains personal security and the broad aspect of railway security two, and the operation of maintenance is implemented mainly for field
The personal safety of personnel and the military service safety of railroad rail.Cognition technology is approached by studying train to alarm in advance, notifies wild
Outer operation group away from track, evacuation appliance, to ensure personnel and train safety.Meanwhile, monitored by studying the whole network rail break, realize
To the safety detection of rail service state, the rail break time is found in time, it is to avoid major accident occurs.Therefore, this two passes are studied
Key technology and equipment preparation are to ensuring that tool is of great significance railway operation safely.
Currently available technology includes a series of different Train Approaching security protection warning systems, such as LJB-I, LJB-
The unmanned road junction intelligent alarm of the Train Approaching security protection warning system of the different models such as II, LJB-III, TDzB-I type railways
System, JY type Train Approaching language early warning plane, rail row Construction traffic proximity warner, the work based on resonance demodulation technique are engaged in come car
Detecting and alarming instrument etc., or but these warning systems involve great expense, cost is very high, otherwise complex structure, install inconvenience.Cause
This, there is provided portable, the inexpensive warning system of a kind of simple structure, installation is a technical problem for being badly in need of solving at present.
The content of the invention
In view of this, a kind of alarm of the application offer, its simple structure, the portable, low cost of installation, technical scheme is such as
Under:
The application provides a kind of alarm, including:
Sonac for monitoring the ultrasonic signal that train on track is approached;
For the fixture by sonac setting on the track;
It is connected with the sonac, for the ultrasonic signal sent according to the sonac, it is determined that currently having
The processor that train is approached;
And, for receiving the alarm signal that the processor sends, and the letter alarmed according to the alarm signal
Number receiver.
Preferably, the sonac is piezoelectric type acoustic sensor.
Preferably, the frequency band range of the sonac is 40kHz-300kHz, the sonac and rail
Contact surface is that ceramic plane or stainless steel are encapsulated.
Preferably, the fixture is magnetic clamp, and the magnetic clamp is in orbit by sonac absorption.
Preferably, the processor includes:
It is connected with the sonac, for receiving and amplifies the preposition of the ultrasonic signal that the sonac sends
Amplifying circuit;
It is connected with the pre-amplification circuit, the ultrasonic signal after amplifying for foundation, it is determined that currently there is train to approach, and
Send the Digital Signal Processing DSP process circuits of alarm signal to booster circuit;
It is connected with the DSP process circuits, for receiving the alarm signal, and the alarm signal is carried out at boosting
The booster circuit of reason;
It is connected with the booster circuit, is sent to the signal receiver for the alarm signal after the boosting is processed
Wireless signal transmission on-off circuit;
Connect with the pre-amplification circuit, DSP process circuits, booster circuit and wireless signal transmission on-off circuit respectively
Connect, for the confession powered for the pre-amplification circuit, DSP process circuits, booster circuit and wireless signal transmission on-off circuit
Circuit.
Preferably, the processor also includes:
It is connected with the DSP process circuits, for the display circuit of display alarm information.
Preferably, the signal receiver includes wireless bracelet.
Preferably, the wireless bracelet includes:
Wireless receiving circuit for receiving the alarm signal;
It is connected with the wireless receiving circuit, for being opened after the rated current for receiving the wireless receiving circuit output
Begin the oscillator for vibrating.
Preferably, the shell of the alarm is portable shell, and the material of the shell is black ABS plastic.
The alarm that the application is provided includes sonac, fixture, processor and signal receiver.Wherein ultrasonic sensing
Device sets in orbit by fixture, with the ultrasonic signal that train on real-time monitoring track is approached.When sonac is monitored
After the ultrasonic signal that train is approached on track, the ultrasonic signal is sent to processor, by processor according to the ultrasonic signal
It is determined that currently thering is train to approach, alarm signal to signal receiver is concurrently sent, to cause the signal receiver according to the report
Alert signal is alarmed.Sonac is set in orbit by the alarm that the application is provided by fixture, simple installation spirit
It is living, the principle based on ultrasound detection, the ultrasonic signal approached using train on sonac real-time monitoring track, by processor
Determine that train is approached according to ultrasonic signal, alarmed by signal receiver, simple structure, easy to use, low cost.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
A kind of structural representation of alarm that Fig. 1 is provided for the application;
Fig. 2 is the structural representation of processor in the application;
Fig. 3 is the structural representation of wireless bracelet in the application.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, a kind of structural representation of the alarm provided it illustrates the application, including:Sonac
10th, fixture 20, processor 30 and signal receiver 40.Specifically:
Fixture 20 sets in orbit sonac 10, to cause train on the real-time monitoring track of sonac 10
The ultrasonic signal for approaching.In the embodiment of the present application, fixture 20 can be specially magnetic clamp 21, and magnetic clamp 21 will be described super
Sonic transducer 10 is adsorbed in orbit, is specifically for example adsorbed on the flange of rail or the web of the rail of track.
In the application actual application, during traveling, wheel can produce ultrasonic wave to train with interorbital friction,
Sonac 10 is adsorbed in orbit being capable of train is approached on real-time monitoring track ultrasonic signal.Ultrasound biography in the application
Sensor 10 can be specially piezoelectric type acoustic sensor 11, and the frequency band range of sonac 10 is 40kHz-300kHz, and institute
It is that ceramic plane or stainless steel are encapsulated that sonac 10 is stated with the contact surface of rail.
Processor 30 is connected with sonac 10.After sonac 10 monitors the ultrasonic signal that train is approached,
Just the ultrasonic signal that will be monitored is sent to processor 30, and according to the ultrasonic signal, determine currently has train to support to processor 30
Closely.Specifically, whether processor 30 can judge currently have train to approach using time frequency analysis algorithm.And preferred, treatment
Device 30 can be previously stored with two kinds of early warning information of yellow early warning and red early warning, and processor 30 specifically determines according to ultrasonic signal
Go out currently for yellow early warning or red early warning.
In the application processor 30 structure as shown in Fig. 2 including:Pre-amplification circuit 31, DSP (Digital
Signal Process, Digital Signal Processing) process circuit 32, booster circuit 33, wireless signal transmission on-off circuit 34 and confession
Circuit 35.
Pre-amplification circuit 31 is connected with sonac 10, for receiving and amplify the sonac 10 transmission
Ultrasonic signal.Wherein, pre-amplification circuit 31 can be specially the pre-amplification circuit of 80dB.
DSP process circuits 32 are connected with the pre-amplification circuit 31, for according to the ultrasonic signal after amplifying, it is determined that working as
Before there is train to approach, concurrently send alarm signal to booster circuit 33.Wherein, alarm signal can be specially yellow early warning information pair
Corresponding second alarm signal of the first alarm signal or red early warning information answered.
Booster circuit 33 is connected with DSP process circuits 32, for receiving the alarm signal, and the alarm signal is entered
Row boosting is processed.Specific the alarm signal of 3.7V is boosted to 12V by booster circuit 33 in this application, and control wireless signal is sent out
Penetrate on-off circuit 34 and send alarm signal.
Wireless signal transmission on-off circuit 34 is connected with booster circuit 33, for by the boosting process after alarm signal
Send to signal receiver 40.The wireless frequency of the wireless signal transmission on-off circuit 34 in the application is 433MHz, can be simultaneously
Alarm signal is sent to 20 signal receivers 40.
Power supply circuit 35 respectively with pre-amplification circuit 31, DSP process circuits 32, booster circuit 33 and wireless signal transmission
On-off circuit 34 is connected, for being sent out for the pre-amplification circuit 31, DSP process circuits 32, booster circuit 33 and wireless signal
On-off circuit 34 is penetrated to power.
Preferred as the application, processor 30 can also include:Display circuit 36.The display circuit 36 and DSP treatment
Circuit 32 is connected, for display alarm information so that user can in time check and learn current alarm detail.Wherein alarm signal
Breath includes yellow early warning information and red early warning information.
The external interface of the processor 30 in the application can include switch interface, a J599 charging inlet and a M5
Sensor connecting interface etc..
Signal receiver 40 is connected with processor 30, for the alarm signal that receiving processor 30 sends, and according to described
Alarm signal is alarmed.
In the application, signal receiver 40 can be specially wireless bracelet, and wireless bracelet is specifically worn on the wrist of user
On.The structure of this is wireless bracelet is as shown in figure 3, can include:The He of wireless receiving circuit 41 for receiving the alarm signal
Oscillator 42.After wireless receiving circuit 41 receives alarm signal, the output end of wireless receiving circuit 41 can export the electric current of 5V,
Electric current is input into oscillator 42, and oscillator 42 starts vibration.
In the application, the shell of alarm can be portable shell, and the material of the shell is black ABS plastic
(Acrylonitrile Butadiene Styrene plastic, acrylonitrile-butadiene-styrene (ABS) plastics), light weight, are easy to
Carry.
In the application actual application, user (especially field work personnel) first adsorbs sonac 10
In on track, specifically, the lipid couplants such as 7805 can be smeared in the contact sensing surface of sonac 10, and then utilize
Magnetic clamp 21, sonac 10 is adsorbed on the flange of rail of track or the web of the rail.Further, by sonac 10 and treatment
The M5 sensor connecting interfaces of device 30 are attached, and wireless bracelet is worn in wrist.During user job, work as ultrasound
After sensor 10 passively monitors the ultrasonic signal that the train of track transmission is approached, ultrasonic signal is sent to processor 30, place
Reason device 30 determines currently have train to approach according to the ultrasonic signal, and then sends alarm signal, wireless hand to wireless bracelet
Ring starts vibration alarming after receiving alarm signal, reminds user to withdraw in time.The alarm that the application is provided can realize prison
Train is surveyed to approach apart from the farthest reachable 3km of gapless rail.
Therefore the alarm that the application is provided has advantages below:
1), the application is set in orbit sonac 10 by fixture 20, and simple installation flexibly, is examined based on ultrasound
The principle of survey, the ultrasonic signal approached using train on the real-time monitoring track of sonac 10, by processor 30 according to ultrasound
Signal determines that train is approached, and is alarmed by signal receiver 40, simple structure, easy to use, low cost.
2), the processor 30 in the application can be communicated to connect with multiple signal receivers 40 simultaneously, there is provided Yi Zhongyi
To the implementation being wirelessly transferred with wearable alarm bracelet of multiple spot, realize to field work it is multiple user's and Times
It is alert.In the application actual application, field work personnel wear wireless bracelet and implement operation, without configuring extra personnel
Remote monitor is carried out, when train is approached, processor 30 launches alarm signal to multiple signal receivers 40, can be to 20m
The bracelet that interior field work personnel are worn sends alarm signal, informs that field work personnel's train is approached, withdraw rapidly,
Without specially setting remote monitoring personnel, personnel's operation is not influenceed, perceive sensitive reliability.
3), the alarm simple structure of the application offer, connection installs simple, portable flexible, and battery durable ability is reachable
More than 12h, can charge at any time.And the alarm is when using, without taking track, make field work without the empty window phase.
A kind of alarm provided herein is described in detail above, specific case used herein is to this
The principle and implementation method of application are set forth, the explanation of above example be only intended to help understand the present processes and
Its core concept;Simultaneously for those of ordinary skill in the art, according to the thought of the application, in specific embodiment and should
Be will change with scope, in sum, this specification content should not be construed as the limitation to the application.
Claims (9)
1. a kind of alarm, it is characterised in that including:
Sonac for monitoring the ultrasonic signal that train on track is approached;
For the fixture by sonac setting on the track;
It is connected with the sonac, for the ultrasonic signal sent according to the sonac, it is determined that currently there is train
The processor for approaching;
And, for receiving the alarm signal that the processor sends, and connect according to the signal that the alarm signal is alarmed
Receive device.
2. alarm according to claim 1, it is characterised in that the sonac is piezoelectric type acoustic sensor.
3. alarm according to claim 2, it is characterised in that the frequency band range of the sonac is 40kHz-
300kHz, the sonac is that ceramic plane or stainless steel are encapsulated with the contact surface of rail.
4. alarm according to claim 1, it is characterised in that the fixture is magnetic clamp, the magnetic clamp will
The sonac absorption is in orbit.
5. alarm according to claim 1, it is characterised in that the processor includes:
It is connected with the sonac, for receiving and amplifies the preposition amplification of the ultrasonic signal that the sonac sends
Circuit;
It is connected with the pre-amplification circuit, for according to the ultrasonic signal after amplifying, it is determined that currently having train to approach, and send
Alarm signal to booster circuit Digital Signal Processing DSP process circuits;
It is connected with the DSP process circuits, for receiving the alarm signal, and treatment of boosting is carried out to the alarm signal
Booster circuit;
It is connected with the booster circuit, is sent to the nothing of the signal receiver for the alarm signal after the boosting is processed
Line signal emission switch circuit;
It is connected with the pre-amplification circuit, DSP process circuits, booster circuit and wireless signal transmission on-off circuit respectively, is used
In the power supply electricity powered for the pre-amplification circuit, DSP process circuits, booster circuit and wireless signal transmission on-off circuit
Road.
6. alarm according to claim 5, it is characterised in that the processor also includes:
It is connected with the DSP process circuits, for the display circuit of display alarm information.
7. alarm according to claim 1, it is characterised in that the signal receiver includes wireless bracelet.
8. alarm according to claim 7, it is characterised in that the wireless bracelet includes:
Wireless receiving circuit for receiving the alarm signal;
It is connected with the wireless receiving circuit, for starting to shake after the rated current for receiving the wireless receiving circuit output
Dynamic oscillator.
9. the alarm according to claim any one of 1-8, it is characterised in that the shell of the alarm is portable outer
Shell, the material of the shell is black ABS plastic.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710008197.7A CN106741003A (en) | 2017-01-05 | 2017-01-05 | A kind of alarm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710008197.7A CN106741003A (en) | 2017-01-05 | 2017-01-05 | A kind of alarm |
Publications (1)
Publication Number | Publication Date |
---|---|
CN106741003A true CN106741003A (en) | 2017-05-31 |
Family
ID=58950572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710008197.7A Pending CN106741003A (en) | 2017-01-05 | 2017-01-05 | A kind of alarm |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106741003A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107458423A (en) * | 2017-07-10 | 2017-12-12 | 吉林市盈冲科技有限公司 | The early warning system of operation personal safety along the line |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06183346A (en) * | 1992-12-21 | 1994-07-05 | Toei Denki Kogyo Kk | Train approach detecting system and train approach detecting device |
CN201116131Y (en) * | 2007-10-17 | 2008-09-17 | 王家安 | Alarm |
CN101279608A (en) * | 2007-11-01 | 2008-10-08 | 中铁八局集团电务工程有限公司 | Safety early warning device for railway construction and method therefor |
JP2009132244A (en) * | 2007-11-29 | 2009-06-18 | Akebono Brake Ind Co Ltd | Train approach detection device |
CN104192175A (en) * | 2014-09-09 | 2014-12-10 | 赵贺峰 | Portable train approach alarm |
CN104494650A (en) * | 2014-12-02 | 2015-04-08 | 北京清网华科技有限公司 | On-route operation monitoring system |
CN105835908A (en) * | 2016-05-30 | 2016-08-10 | 上海铁路局合肥机务段 | Train approach warning device |
CN105923021A (en) * | 2016-05-17 | 2016-09-07 | 吉林铁道职业技术学院 | Railway construction safety protection system based on radio technology |
CN106184294A (en) * | 2016-08-27 | 2016-12-07 | 上海奥铁通讯技术有限公司 | A kind of Along Railway construction safety protection system and method |
CN206561855U (en) * | 2017-01-05 | 2017-10-17 | 哈尔滨铁路局科学技术研究所 | A kind of alarm |
-
2017
- 2017-01-05 CN CN201710008197.7A patent/CN106741003A/en active Pending
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06183346A (en) * | 1992-12-21 | 1994-07-05 | Toei Denki Kogyo Kk | Train approach detecting system and train approach detecting device |
CN201116131Y (en) * | 2007-10-17 | 2008-09-17 | 王家安 | Alarm |
CN101279608A (en) * | 2007-11-01 | 2008-10-08 | 中铁八局集团电务工程有限公司 | Safety early warning device for railway construction and method therefor |
JP2009132244A (en) * | 2007-11-29 | 2009-06-18 | Akebono Brake Ind Co Ltd | Train approach detection device |
CN104192175A (en) * | 2014-09-09 | 2014-12-10 | 赵贺峰 | Portable train approach alarm |
CN104494650A (en) * | 2014-12-02 | 2015-04-08 | 北京清网华科技有限公司 | On-route operation monitoring system |
CN105923021A (en) * | 2016-05-17 | 2016-09-07 | 吉林铁道职业技术学院 | Railway construction safety protection system based on radio technology |
CN105835908A (en) * | 2016-05-30 | 2016-08-10 | 上海铁路局合肥机务段 | Train approach warning device |
CN106184294A (en) * | 2016-08-27 | 2016-12-07 | 上海奥铁通讯技术有限公司 | A kind of Along Railway construction safety protection system and method |
CN206561855U (en) * | 2017-01-05 | 2017-10-17 | 哈尔滨铁路局科学技术研究所 | A kind of alarm |
Non-Patent Citations (2)
Title |
---|
何社成等编: "《报警 指示提醒 告知应用电路》", 31 January 2007 * |
陈永甫主编: "《实用电子报警装置全书》", 30 June 1994 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107458423A (en) * | 2017-07-10 | 2017-12-12 | 吉林市盈冲科技有限公司 | The early warning system of operation personal safety along the line |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101279608B (en) | Safety early warning device for railway construction and method therefor | |
CN106297189B (en) | Traffic accident automobile automatic alarm system and traffic accident alarming method by monitoring | |
CN104287721A (en) | Vehicle-mounted multi-parameter physiological monitoring device | |
CN105835908B (en) | Train approach warning device | |
CN104554343A (en) | Track breaking monitoring system of high-speed railway | |
CN108332789A (en) | A kind of structural healthy monitoring system of train pantograph | |
CN110470736A (en) | A kind of rail monitoring system and its control method based on wireless network | |
CN206561855U (en) | A kind of alarm | |
CN106741003A (en) | A kind of alarm | |
CN203931092U (en) | A kind of charged attention device | |
CN204415431U (en) | High speed railway breaks rail monitoring system | |
CN205334686U (en) | Drowned safety coefficient is prevented to swimming pool | |
CN201095371Y (en) | Railway construction safety prewarning device | |
CN106381888A (en) | Inspection well cover anti-theft detection device and control method | |
CN107089244A (en) | A kind of railway switch damage detection system | |
CN203017333U (en) | Blind crutch | |
CN205819228U (en) | Train approach warning device | |
CN106740983B (en) | A kind of track fracture monitoring method and device | |
CN204178505U (en) | Charging equipment safe distance prior-warning device | |
CN206387911U (en) | On-vehicle positioning terminal | |
CN201540638U (en) | Multifunctional remote sensing monitoring system | |
CN206235652U (en) | It is a kind of based on the electrical verification system being wirelessly transferred | |
CN109050560A (en) | A kind of self energizing luggage carrier with warning function | |
CN201079488Y (en) | Portable intelligent blindness-aiding device | |
CN206049437U (en) | Child safety seat with wireless charging device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |