CN104881938A - Manhole cover monitoring system based on light sensing technologies - Google Patents
Manhole cover monitoring system based on light sensing technologies Download PDFInfo
- Publication number
- CN104881938A CN104881938A CN201410069398.4A CN201410069398A CN104881938A CN 104881938 A CN104881938 A CN 104881938A CN 201410069398 A CN201410069398 A CN 201410069398A CN 104881938 A CN104881938 A CN 104881938A
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- China
- Prior art keywords
- extension set
- sensitive device
- well lid
- light sensitive
- signal
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- 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.)
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
Abstract
The utility model discloses a manhole cover monitoring system based on light sensing technologies, which comprises a monitoring center, an alarm system and at least one monitoring extension set. Each monitoring extension set is connected with a plurality of light sensing devices through physical lines. Each light sensing device is correspondingly arranged inside a tube well for sensing and detecting the closing state of a manhole cover and further sending manhole cover state signals to the connected monitoring extension set. Each monitoring extension set is used for independently receiving state signals uploaded by the light sensing devices and converting the signals into digital signals which are further uploaded to the monitoring center. The monitoring center is in communication connection with each monitoring extension set in a TCP/IP networking means and used for analyzing and processing monitoring data uploaded by each monitoring extension set and further determining whether to emit alarm control signals to the alarm system or not according to the processing results. The manhole cover monitoring system which effectively achieves a manhole cover antitheft function is simple, effective, highly reliable and has a low cost.
Description
Technical field
The present invention relates to well lid monitoring technique field, particularly relate to a kind of well lid supervisory system based on light sensation technology.
Background technology
Along with developing rapidly of urban construction, under the road in city, be embedded with the various pipelines such as thermal pipe, Gas Pipe, power cable and telecommunication cable.Conveniently pipeline maintenance, road is provided with inspection chamber, inspection chamber is provided with openable well lid.Current Municipal well lid recoverable amount is huge, because well lid is in outdoor ground surface usually, general is all be made up of rigid material, therefore easily stolen or stand External Force Acting for a long time and crack damage, cause trap dangerous to vehicular traffic and pedestrian, long-term exposure also can cause the damage of facility in pipe well or facility stolen.According to statistics, the stolen well lid enormous amount in current city, and lack corresponding system in existing network to well lid and monitor in real time, cause municipal operation cost greatly to increase.
The current well lid for flood tide in city carries out the active demand of effective management and maintenance, traditional manhole cover anti-theft technology is generally design its anti-theft feature from physical construction aspect, such as: iron chains attached method, hinge-coupled method, seam derotation method, bolt plug-hole method, tapered end key method, shift fork joint interlock method etc., but due to the impact of the complexity that is limited to manufacturing technology and onsite application environment, implementation result is poor, effectively can not prevent the generation of pilferage behavior.
Prior art also have employed electronic warning system and carries out security monitoring to well lid, but mostly use monotechnics and do not form Distributed Network Monitoring effect, or fail resolution system powerup issue, lithium battery is powered nearby or cable remote is powered all exists the technical matters being difficult to overcome, as usually comparatively moist in pipe well, therefore to be arranged on pipe well content moisture-sensitive aging for lithium battery, is not suitable for down-hole rugged surroundings; Cable remote is powered, and needs other wiring, sets up difficulty and is more easily destroyed.Additionally use in the market and comprise the kinds of schemes such as short message alarm, telephone line communication alarm and solve the fixing easily stolen problem of well lid.But, information collecting device in these schemes is often difficult to adapt to the rugged surroundings such as down-hole is moist, produces huge resource consume (as a large amount of SIM card and card number resource), and power supply is difficult to solve, maintenance difficulties and maintenance cost high, cannot as an effective well lid monitoring scheme.
Summary of the invention
Technical matters to be solved by this invention is, a kind of reasonable in design and well lid supervisory system based on light sensation technology that theftproof performance is strong is provided, utilize the monitoring state of photosensitive device to well lid that power supply is provided without the need to scene, and by monitoring extension set that can be disposed in the interior, the well lid status information that each photosensitive device obtains is monitored.
For solving above technical matters, the invention provides a kind of well lid supervisory system based on light sensation technology, comprising: Surveillance center, warning system and at least one monitoring extension set;
Each described monitoring extension set is connected with multiple light sensitive device by physical circuit; Light sensitive device correspondence described in each is arranged in a pipe well, for sensing the closure state of the well lid of described pipe well, and sends well lid status signal to connected monitoring extension set;
Described monitoring extension set is used for the status signal that the multiple light sensitive device of individual reception is uploaded, and is uploaded to described Surveillance center after described status signal is converted to digital signal;
Described Surveillance center is communicated to connect by TCP/IP networking mode and each described monitoring extension set, monitor data for uploading the monitoring extension set described in each carries out analyzing and processing, determines whether to send alarm control signal to described warning system according to result;
Described warning system is used for sending corresponding alarm signal according to described alarm control signal.
Preferably, each described monitoring extension set adopts modular design, comprising:
Multiple single-chip microcomputer; Described single-chip microcomputer and described light sensitive device connect one to one, and for the status signal of each light sensitive device of independent acquisition, and carry out analog to digital conversion to described status signal;
Main control processor, for gathering the status signal after carrying out analog to digital conversion, detects the current state of the corresponding light sensitive device connected of each single-chip microcomputer;
Status poll circuit, is connected with described main control processor, under the control of described main control processor, carries out poll to the data of single-chip microcomputer described in each;
Network connecting module, is connected with described main control processor, for passing through TCP/IP networking mode by the detection data upload of described main control processor to described Surveillance center;
Power circuit, for powering to each functional module of described monitoring extension set.
Further, single-chip microcomputer described in each is respectively arranged with the analog to digital converter that the status signal that the light sensitive device from correspondence collects is converted to digital signal by.
Further, described monitoring extension set also comprises multiple LED, and each described LED and described single-chip microcomputer connect one to one, for the status signal of light sensitive device detected according to described single-chip microcomputer, and the current state of the light sensitive device that instruction is corresponding with it.
Can in implementation in one, described warning system is instant messaging service platform, for when receiving the alarm control signal that described Surveillance center sends, sends alarm signal to the smart mobile phone associated by described light sensitive device; Described alarm signal comprises word, voice signal, vision signal and picture.
Can in implementation at another kind, described warning system is short message sending platform, for when receiving the alarm control signal that described Surveillance center sends, sends alarm signal by mobile communications network to the user associated by described light sensitive device.
Preferably, described light sensitive device is photosensitive probe.
Wherein, described photosensitive probe adopts direct plugging-in epoxy encapsulation, comprises waterproof case and the photo-resistor being arranged on described waterproof case inside;
Organic silica gel and epoxy resin is adopted to carry out mixing with EP hardening agent two component adhesive and fill between described waterproof case with described photo-resistor.
Again further, described waterproof case adopts tygon to be made; The light resistance value of described photo-resistor is 8 ~ 20k Ω, and dark resistance value is 0.5M Ω.
Preferably, described physical circuit is telephone wire.
Well lid supervisory system based on light sensation technology provided by the invention, owing to have employed light sensitive device as the status information capture terminal to well lid, without the need to providing field power supply, carry out remote pulse signal by means of only single-chip microcomputer corresponding with it to control, monitoring extension set can be arranged in indoor realization and carry out information acquisition and control to multiple light sensitive device simultaneously, therefore efficiently solve powerup issue, and achieve the Long-distance Control to light sensitive device; And light sensitive device can be further designed to the photosensitive probe of water proof type, to adapt to the rugged surroundings such as down-hole is moist; Each monitoring extension set is integrated with multiple single-chip microcomputer, and single-chip microcomputer and light sensitive device one_to_one corresponding carry out independent acquisition, gathers that accurate speed is fast, failure rate is low, safety and reliability are high, improves the practicality of well lid supervisory system; And the warning system set by well lid supervisory system provided by the invention, in conjunction with now popular instant messaging service platform or mobile communications network, alarm signal can be notified responsible person concerned, therefore, effectively can realize the anti-theft feature to well lid, simply effectively, reliability is high and cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the well lid supervisory system based on light sensation technology that the embodiment of the present invention one provides;
Fig. 2 is a kind of structural representation of the monitoring extension set that the embodiment of the present invention two provides;
Fig. 3 is a kind of structural representation of the water proof type photosensitive probe that the embodiment of the present invention three provides;
Fig. 4 is the installation site schematic diagram of the photosensitive probe that provides of the embodiment of the present invention three at pipe well.
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 clearly and completely described.
Embodiment one
See Fig. 1, it is the structural representation of the well lid supervisory system based on light sensation technology that the embodiment of the present invention one provides.
In the present embodiment, the described well lid supervisory system based on light sensation technology, comprising: Surveillance center 101, warning system 102 and at least one monitoring extension set.
Each described monitoring extension set is connected with multiple light sensitive device by physical circuit; Light sensitive device correspondence described in each is arranged in a pipe well, for sensing the closure state of the well lid of described pipe well, and sends well lid status signal to connected monitoring extension set.As shown in Figure 1, particularly, monitor extension set 1 and be connected with light sensitive device 1 ~ light sensitive device m
1, monitoring extension set 2 is connected with light sensitive device 1 ~ light sensitive device m
2, so analogize, monitoring extension set N is connected with light sensitive device 1 ~ light sensitive device m
n, parameter puts m
1, m
2with m
nall desirable arbitrary positive integer value.Especially, each monitoring extension set is all connected with 10 light sensitive device.During concrete enforcement, each monitoring extension set gathers the status signal of multiple light sensitive device that it connects simultaneously, status data is obtained by gathering after the status signal obtained processes, and this status data is uploaded in Surveillance center 101 by TCP/IP networking mode carries out critical-path analysis, to realize the condition monitoring to light sensitive device, thus obtain the duty of current well lid.
Particularly, described monitoring extension set is used for the status signal that the multiple light sensitive device of individual reception is uploaded, and is uploaded to described Surveillance center 101 after described status signal is converted to digital signal.
Described Surveillance center 101 is communicated to connect by TCP/IP networking mode and each described monitoring extension set, monitor data for uploading the monitoring extension set described in each carries out analyzing and processing, determines whether to send alarm control signal to described warning system 102 according to result.
Described warning system 102 is for sending corresponding alarm signal according to described alarm control signal.
TCP/IP is Transmission Control Protocol/Internet Protocol(TCP/IP) write a Chinese character in simplified form, it provide point-to-point Linking mechanism, how data should be encapsulated, addressing, transmission, route and how to receive in destination, standardization all in addition, software communication procedural abstraction is turned to four level of abstractions, take the mode of protocol stack to make different communication protocol respectively.TCP provides the reliable data transmission under IP world, realize data stream, effectively Flow Control, full-duplex operation and multiplexed, therefore achieve connection-oriented, end to end, reliably light sensation data transmission, improve and monitor the reliability of extension set to the detection data of Surveillance center 101 by multiple stage.
Can in implementation in one, described warning system 102 is instant messaging service platform, for when receiving the alarm control signal that described Surveillance center 101 sends, to sending alarm signal with the smart mobile phone associated by described light sensitive device; Described alarm signal comprises word, voice signal, vision signal and picture.
Wherein, instant messaging service platform is the product of information age, and user can pass through smart mobile phone, panel computer and webpage, sends the information such as voice, video, picture and word by this platform fast.Typical real-time phonetic communication platform is Pty Ltd of Tengxun is " micro-letter " platform of smart mobile phone release in recent years.In the present embodiment, during concrete enforcement, because " micro-letter " platform support is across common carrier, spanning operation system platform, therefore, well lid supervisory system provided by the invention can utilize smart mobile phone to receive the various forms of alarm signals sent by Surveillance center 101, service end generates an exclusive identification code UUID to webpage client, monitoring service end logging request; Smart mobile phone client logs " micro-letter " receives the warning information of Surveillance center 101.
Can in implementation at another kind, described warning system 102 is short message sending platform, for when receiving the alarm control signal that described Surveillance center 101 sends, sends alarm signal by mobile communications network to the user associated by described light sensitive device.
Embodiment two
The present embodiment, on the basis of embodiment one, further, designs the function structure of each monitoring extension set.
Referring to Fig. 2, it is a kind of structural representation of the monitoring extension set that the embodiment of the present invention two provides.
Particularly, each described monitoring extension set adopts modular design, comprising:
Multiple single-chip microcomputer; Described single-chip microcomputer and described light sensitive device connect one to one, and for the status signal of each light sensitive device of independent acquisition, and carry out analog to digital conversion to described status signal; Preferably, single-chip microcomputer described in each is respectively arranged with the analog to digital converter that the status signal that the light sensitive device from correspondence collects is converted to digital signal by.To monitor extension set 1, preferably, monitoring extension set 1 is provided with m single-chip microcomputer, and single-chip microcomputer 1 is corresponding with light sensitive device 1 connects, and single-chip microcomputer 2 is corresponding with light sensitive device 2 to be connected, and so analogizes, and single-chip microcomputer m is corresponding with light sensitive device m to be connected.The status information sent due to each light sensitive device is simulating signal, therefore, for the ease of the Treatment Analysis to signal, needs to arrange analog to digital converter in single-chip microcomputer, status signal is converted to digital signal.
Preferably, described monitoring extension set 1 is disposed in the interior, by physical circuit (as telephone wire) with as described in light sensitive device 1 ~ light sensitive device m be connected, and remote monitoring is carried out to light sensitive device described in each.During concrete enforcement, monitoring 1, extension set needs to send pulse signal at a distance by the single-chip microcomputer established in it, arrives light sensitive device, then can realize the control to light sensitive device and power supply via telephone line transmission.
In the present embodiment, described monitoring extension set also comprises main control processor 201, for gathering the status signal after carrying out analog to digital conversion, detects the current state of the corresponding light sensitive device connected of each single-chip microcomputer.
Status poll circuit 202, is connected with described main control processor 201, under the control of described main control processor 201, carries out poll to the data of single-chip microcomputer described in each.
Network connecting module 203, is connected with described main control processor 201, for passing through TCP/IP networking mode by the detection data upload of described main control processor 201 to described Surveillance center.
Power circuit 204, for powering to each functional module of described monitoring extension set.
Further, to monitor extension set 1, described monitoring extension set 1 also comprises multiple LED, and each described LED and described single-chip microcomputer connect one to one, for the status signal of light sensitive device detected according to described single-chip microcomputer, the current state of the light sensitive device that instruction is corresponding with it.
Embodiment three
The present embodiment is identical with the basic functional principle of embodiment two, and on the basis of embodiment two, and further, described based in the well lid supervisory system of light sensation technology, described light sensitive device is photosensitive probe.
See Fig. 3, it is a kind of structural representation of the water proof type photosensitive probe that the embodiment of the present invention three provides.
During concrete enforcement, described photosensitive probe adopts direct plugging-in epoxy encapsulation, comprises waterproof case 301 and the photo-resistor 302 being arranged on described waterproof case 301 inside.
Transparent waterproof materials 303 is adopted to fill between described waterproof case 301 and described photo-resistor 302, preferably, transparent waterproof materials 303 is the potpourri of organic silica gel and epoxy resin and EP hardening agent two component adhesive, namely adopts organic silica gel and epoxy resin to carry out mixing with EP hardening agent two component adhesive and fill between described waterproof case 301 with described photo-resistor 302.
Further, described waterproof case 301 adopts tygon to be made; The light resistance value of described photo-resistor 302 is 8 ~ 20k Ω, and dark resistance value is 0.5M Ω.When there being light to irradiate, the electronics being originally in steady state (SS) in photo-resistor 302 is excited, and become free electron, therefore light is stronger, and the free electron of generation is also more, and resistance value will be less.When resistance (room temperature) under the state not having light to irradiate completely, resistance value is at this moment claimed to be dark resistance value; When under the state that resistance irradiates at sufficient light (room temperature), resistance value is at this moment claimed to be light resistance value.Particularly, corresponding with dark resistance value electric current is dark current; Being worth corresponding electric current with light resistance is light current.Therefore, the light resistance value of photo-resistor 302 and dark resistance value reflect the sensitivity of photo-resistor 302 pairs of light, thus by regulating the light resistance value of photo-resistor 302 and dark resistance value to control the sensitivity monitored well lid.
As shown in Figure 4, the photosensitive probe provided for the embodiment of the present invention three is at the installation site schematic diagram of pipe well.
Can in implementation, be tubular caliber 402 inside described pipe well 401 in one; Particularly, the length of tubular caliber 402 is less than the degree of depth of pipe well 401 usually, therefore, described water proof type photosensitive probe 403 to be arranged in the middle part of described pipe well 401 and its probe orientation in alignment with immediately below described tubular caliber 402.During concrete enforcement, when well lid (not drawing in Fig. 4) is opened, outdoor light will be slanted on the probe of water proof type photosensitive probe 403 at well head, therefore water proof type photosensitive probe 403 can the closure state of Real-Time Monitoring well lid, improves the Detection accuracy to well lid state.
Well lid supervisory system based on light sensation technology provided by the invention, owing to have employed light sensitive device as the status information capture terminal to well lid, without the need to providing field power supply, carry out remote pulse signal by means of only single-chip microcomputer corresponding with it to control, monitoring extension set can be arranged in indoor realization and carry out information acquisition and control to multiple light sensitive device simultaneously, therefore efficiently solve powerup issue, and achieve the Long-distance Control to light sensitive device; And light sensitive device can be further designed to the photosensitive probe of water proof type, to adapt to the rugged surroundings such as down-hole is moist; Each monitoring extension set is integrated with multiple single-chip microcomputer, and single-chip microcomputer and light sensitive device one_to_one corresponding carry out independent acquisition, gathers that accurate speed is fast, failure rate is low, safety and reliability are high, improves the practicality of well lid supervisory system; And the warning system set by well lid supervisory system provided by the invention, in conjunction with now popular instant messaging service platform or mobile communications network, alarm signal can be notified responsible person concerned, therefore, effectively can realize the anti-theft feature to well lid, simply effectively, reliability is high and cost is low.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. based on a well lid supervisory system for light sensation technology, it is characterized in that, comprising: Surveillance center, warning system and at least one monitoring extension set;
Each described monitoring extension set is connected with multiple light sensitive device by physical circuit; Light sensitive device correspondence described in each is arranged in a pipe well, for sensing the closure state of the well lid of described pipe well, and sends well lid status signal to connected monitoring extension set;
Described monitoring extension set is used for the status signal that the multiple light sensitive device of individual reception is uploaded, and is uploaded to described Surveillance center after described status signal is converted to digital signal;
Described Surveillance center is communicated to connect by TCP/IP networking mode and each described monitoring extension set, monitor data for uploading the monitoring extension set described in each carries out analyzing and processing, determines whether to send alarm control signal to described warning system according to result;
Described warning system is used for sending corresponding alarm signal according to described alarm control signal.
2. as claimed in claim 1 based on the well lid supervisory system of light sensation technology, it is characterized in that, each described monitoring extension set adopts modular design, comprising:
Multiple single-chip microcomputer; Described single-chip microcomputer and described light sensitive device connect one to one, and for the status signal of each light sensitive device of independent acquisition, and carry out analog to digital conversion to described status signal;
Main control processor, for gathering the status signal after carrying out analog to digital conversion, detects the current state of the corresponding light sensitive device connected of each single-chip microcomputer;
Status poll circuit, is connected with described main control processor, under the control of described main control processor, carries out poll to the data of single-chip microcomputer described in each;
Network connecting module, is connected with described main control processor, for passing through TCP/IP networking mode by the detection data upload of described main control processor to described Surveillance center;
Power circuit, for powering to each functional module of described monitoring extension set.
3., as claimed in claim 2 based on the well lid supervisory system of light sensation technology, it is characterized in that, single-chip microcomputer described in each is respectively arranged with the analog to digital converter that the status signal that the light sensitive device from correspondence collects is converted to digital signal by.
4. as claimed in claim 3 based on the well lid supervisory system of light sensation technology, it is characterized in that, described monitoring extension set also comprises multiple LED, each described LED and described single-chip microcomputer connect one to one, for the status signal of light sensitive device detected according to described single-chip microcomputer, the current state of the light sensitive device that instruction is corresponding with it.
5. as claimed in claim 1 based on the well lid supervisory system of light sensation technology, it is characterized in that, described warning system is instant messaging service platform, for when receiving the alarm control signal that described Surveillance center sends, send alarm signal to the smart mobile phone associated by described light sensitive device;
Described alarm signal comprises word, voice signal, vision signal and picture.
6. as claimed in claim 1 based on the well lid Ore-controlling Role of light sensation technology, it is characterized in that, described warning system is short message sending platform, for when receiving the alarm control signal that described Surveillance center sends, send alarm signal by mobile communications network to the user associated by described light sensitive device.
7. the well lid supervisory system based on light sensation technology as described in any one of claim 1 ~ 6, is characterized in that, described light sensitive device is photosensitive probe.
8. as claimed in claim 7 based on the well lid supervisory system of light sensation technology, it is characterized in that, described photosensitive probe adopts direct plugging-in epoxy encapsulation, comprises waterproof case and the photo-resistor being arranged on described waterproof case inside;
Organic silica gel and epoxy resin is adopted to carry out mixing with EP hardening agent two component adhesive and fill between described waterproof case with described photo-resistor.
9. as claimed in claim 8 based on the well lid supervisory system of light sensation technology, it is characterized in that, described waterproof case adopts tygon to be made; The light resistance value of described photo-resistor is 8 ~ 20k Ω, and dark resistance value is 0.5M Ω.
10., as claimed in claim 9 based on the well lid supervisory system of light sensation technology, it is characterized in that, described physical circuit is telephone wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410069398.4A CN104881938A (en) | 2014-02-27 | 2014-02-27 | Manhole cover monitoring system based on light sensing technologies |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410069398.4A CN104881938A (en) | 2014-02-27 | 2014-02-27 | Manhole cover monitoring system based on light sensing technologies |
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| CN104881938A true CN104881938A (en) | 2015-09-02 |
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| CN201410069398.4A Pending CN104881938A (en) | 2014-02-27 | 2014-02-27 | Manhole cover monitoring system based on light sensing technologies |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106381888A (en) * | 2016-11-25 | 2017-02-08 | 合肥大明节能科技股份有限公司 | Inspection well cover anti-theft detection device and control method |
| CN107765586A (en) * | 2017-07-06 | 2018-03-06 | 深圳市金讯宇科技有限公司 | A kind of intelligent movable city manhole cover monitoring early-warning system |
| GB2565169A (en) * | 2017-07-31 | 2019-02-06 | Windsor D W Ltd | Sensing apparatus |
-
2014
- 2014-02-27 CN CN201410069398.4A patent/CN104881938A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106381888A (en) * | 2016-11-25 | 2017-02-08 | 合肥大明节能科技股份有限公司 | Inspection well cover anti-theft detection device and control method |
| CN106381888B (en) * | 2016-11-25 | 2019-03-12 | 合肥大明节能科技股份有限公司 | Manhole cover anti-theft detection device and control method |
| CN107765586A (en) * | 2017-07-06 | 2018-03-06 | 深圳市金讯宇科技有限公司 | A kind of intelligent movable city manhole cover monitoring early-warning system |
| GB2565169A (en) * | 2017-07-31 | 2019-02-06 | Windsor D W Ltd | Sensing apparatus |
| GB2565169B (en) * | 2017-07-31 | 2020-07-15 | Windsor D W Ltd | Sensing apparatus |
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