CN103645721B - Smart electronics manhole cover system based on co-cable transmission - Google Patents
Smart electronics manhole cover system based on co-cable transmission Download PDFInfo
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- CN103645721B CN103645721B CN201310700110.4A CN201310700110A CN103645721B CN 103645721 B CN103645721 B CN 103645721B CN 201310700110 A CN201310700110 A CN 201310700110A CN 103645721 B CN103645721 B CN 103645721B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of smart electronics manhole cover system based on co-cable transmission, it includes single cable control main frame, co-cable transmission bus and smart electronics well lid, single cable control main frame is arranged at transformer station or underground pipe network tunnel portal, in order to be monitored the state of well lid and open and close controlling；It is connected in co-cable transmission bus is arranged on underground pipe network tunnel and with single cable control main frame；Smart electronics well lid parallel connection accesses co-cable transmission bus, smart electronics well lid from machine in order to manhole cover body is monitored and monitoring information is sent to single cable control main frame by co-cable transmission bus, receive the order of single cable control main frame simultaneously and make corresponding action according to order.Present invention achieves power supply and data common cable is transmitted, it is possible to well lid state is remotely monitored, quickly report the abnormal information of well lid, and realize the long-range action to well lid according to the order of single cable control main frame；Solve the long-range monitoring problem of underground pipe network tunnel raceway groove in the case of non-transformer.
Description
Technical field
The present invention relates to the monitoring system of a kind of underground pipe network well lid, specifically a kind of based on co-cable transmission
Smart electronics manhole cover system.
Background technology
Along with the development of urban construction, city constantly extends to underground, such as power cable, communication electricity
Cable, the underground pipe network such as optical cable, rainwater sewage all lays in underground, the tunnel's entrance and exit of underground pipe network
General employing well lid is closed, but, illegally invade due to what stolen, the destruction of well lid were caused at home
Entering and then form secondary destruction and become an outstanding problem, the monitoring to well lid has become compeling of urgent need solution
Cut problem.Underground line pipe network wide coverage, distance, and intelligence cannot be provided in most circuit pipe network
The power supply of energy equipment work, this becomes the outstanding problem of restriction underground pipe network well lid monitoring.
Summary of the invention
For the deficiency overcoming above-mentioned prior art to exist, the invention provides a kind of intelligence based on co-cable transmission
Electronic manhole cover system, can complete the long-range of well lid in the distance underground pipe network tunnel not having power supply to supply
It is monitored and controlled.
The present invention solves its technical problem and is adopted the technical scheme that: smart electronics based on co-cable transmission
Manhole cover system, is characterized in that, including single cable control main frame, at least one tunnel co-cable transmission bus and some intelligence
Energy electronic manhole cover,
Described single cable control main frame is arranged at transformer station or underground pipe network tunnel portal, and it includes main frame
CPU, RS485 interface, RJ45 interface, power module, photoelectric isolating circuit, transmitter unit and reception list
Unit, in order to be monitored and open and close controlling the state of smart electronics well lid；
Described co-cable transmission bus is arranged in underground pipe network tunnel, and is connected with single cable control main frame；
Described smart electronics well lid parallel connection accesses co-cable transmission bus, and smart electronics well lid includes that well lid is originally
Body and be arranged on bottom manhole cover body from machine, described include from machine CPU, receiver module, transmitting mould from machine
Block, magnetic key operated lock, position sensor, acceleration transducer and energy-storage units, in order to carry out manhole cover body
Monitoring information is also sent to single cable control main frame by co-cable transmission bus by monitoring, receives cable control altogether simultaneously
The order of main frame processed also makes corresponding action according to order；
Described host CPU is connected with RS485 interface, RJ45 interface and power module respectively, described transmitting
Unit is connected with host CPU by photoelectric isolating circuit, and is connected with the receiver module from machine；Described connect
Receive unit to be connected with host CPU by photoelectric isolating circuit, and be connected with the transmitter module from machine；Described
Power module is constant pressure source, provides working power for single cable control main frame；
Described from machine CPU respectively with receiver module, transmitter module, magnetic key operated lock, position sensor, acceleration
Degree sensor and energy-storage units connect, and described receiver module is by co-cable transmission bus and single cable control main frame
Transmitter unit connect, the described transmitter module reception list by co-cable transmission bus and single cable control main frame
Unit connects, and described magnetic key operated lock is arranged in manhole cover body, in order to control the unlatching of manhole cover body；Institute's rheme
Put sensor and acceleration transducer is arranged in manhole cover body, in order to monitor the different condition of manhole cover body；
Described energy-storage units cable transfer bus together connects, and provides working power with thinking from machine.
Preferably, described transmitter unit includes constant-current source H1 and EMC wave filter, described constant-current source H1's
Input is connected with constant pressure source Vdc, and outfan is by co-cable transmission bus with smart electronics well lid from machine even
Connecing, described smart electronics well lid accesses co-cable transmission bus from machine parallel connection；Described EMC wave filter is arranged
Outfan at constant-current source H1.
Preferably, described constant-current source H1 includes LM2576 chip U1, resistance R9, resistance R10, resistance
R11, adjustable resistance RW, sample resistance R0, polar capacitor C4, polar capacitor C5, diode D3, two
Pole pipe D4, inductance L1 and LM393 dual power supply comparator IC1；The pin 1 of described LM2576 chip U1
Be connected with positive pole and the VIN of polar capacitor C4 respectively, pin 2 respectively with negative pole and the electricity of diode D3
One end of sense L1 connects；The other end of described inductance L1 is electric with the positive pole of polar capacitor C5 and load respectively
One end of resistance R connects；The other end of described load resistance R respectively with one end and the LM393 of sample resistance R0
The pin 3 of dual power supply comparator IC1 connects, the pin 2 points of described LM393 dual power supply comparator IC1
It is not connected with one end of resistance R11 and one end of adjustable resistance RW；The other end of described resistance R11 is respectively
It is connected with one end of resistance R10 and the positive pole of diode D4；Described LM393 dual power supply comparator IC1's
Pin 1 is connected with one end of resistance R10 and the pin 4 of LM2576 chip U1 respectively；Described resistance
The pin 8 of the other end of R9, the other end of resistance R10 and LM393 dual power supply comparator IC1 respectively with
Positive pole VCC connects；The described pin 3 of LM2576 chip U1, the pin 5 of LM2576 chip U1,
The negative pole of polar capacitor C4, the negative pole of polar capacitor C5, the positive pole of diode D3, sample resistance R0
The other end, the negative pole of diode D4, the pin 4 of LM393 dual power supply comparator IC1 and adjustable resistance
The other end of RW and adjustable end ground connection respectively.
Preferably, described each road co-cable transmission bus is provided with and is connected in parallel with smart electronics well lid
Match circuit, described match circuit includes resistance RZ and the electric capacity CZ being connected in series.
Preferably, described transmitter module includes that audion Q1 and resistance r1, described resistance r1 connect three poles
After pipe Q1 with smart electronics well lid from machine equivalent resistance RL form parallel circuit, described parallel circuit string
It is connected in co-cable transmission bus line；The base stage of described audion Q1 is connected with from machine CPU.
Preferably, described single cable control main frame receive unit and the receiver module from machine all include resistance R1,
Resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, electric capacity C1,
Electric capacity C2, electric capacity C3, diode D1, diode D2 and operational amplifier A 1；Described electric capacity C1's
One end is connected by the positive terminal of resistance R1 cable transfer bus together, the described other end respectively with resistance R2
One end, the positive pole of diode D1, the negative pole of diode D2 and electric capacity C2 one end connect；Described electricity
Hold the other end of C2 respectively with one end, one end of resistance R4, one end of resistance R7 and the fortune of resistance R3
The negative input end calculating amplifier A1 connects；The positive input terminal of described operational amplifier A 1 respectively with resistance R5
One end and resistance R6 one end connect, positive electrical source is connected with+5V voltage, negative power supply end ground connection,
Outfan is connected with the other end, one end of resistance R8 and the VOUT output point of resistance R7 respectively；Described resistance
The other end of R8 is connected with+5V voltage；The two ends of described electric capacity C3 are respectively with operational amplifier A 1 just
Pole power end and negative electricity source connect；The other end of described resistance R3 and the other end of resistance R5 are respectively
It is connected with+5V voltage；The other end of described resistance R2, the negative pole of diode D1, diode D2 are just
The negative pole end of the other end of pole, the other end of resistance R4 and resistance R6 cable transfer bus the most together connects
Rear ground connection.
Preferably, described operational amplifier A 1 includes CA3140 operational amplifier.
Further, should also include remotely managing master control system by smart electronics manhole cover system based on co-cable transmission
System, described long-range management master control system is connected with single cable control main frame by Ethernet.
Further, described co-cable transmission bus includes six tunnel co-cable transmission buses, described each road
Connect in co-cable transmission bus and have several smart electronics well lids from machine；Described each road co-cable transmission bus
It is made up of two low-smoke non-halogen flame-retardant communicaton and signal cables.
Further, described host CPU and all use STM32L chip from machine CPU.
Co-cable transmission of the present invention realize principle:
Co-cable transmission refers to that the host CPU of single cable control main frame is by control signal, monitoring signal, communication letter
Number complete digitized, and realize smart electronics by power supply energy storage technology and constant-current source-bus variable resistance technology
Well lid is transmitted on common cable from working power and the communication signal of machine.Co-cable transmission bus power source
Being made up of a constant pressure source Vdc and a constant-current source H1, constant pressure source Vdc concatenation constant-current source H1 is cable altogether
Each equipment on transfer bus provides working power, and the effect of constant-current source H1 is to utilize its AC internal Resistance pole
Big characteristic, produces buffer action to AC signal in co-cable transmission bus, it is to avoid AC signal is by voltage
Source short circuit absorbs.Whether smart electronics well lid determines resistance r1 by the switch of electronic switching transistor Q1
It is incorporated to bus, completes data transmit by changing bus impedance.Constant-current source is smart electronics well simultaneously
The energy-storage units of lid is charged making smart electronics well lid obtain working power.When single cable control main frame with from
When machine carries out data transmission, when machine CPU controls audion BG1 conducting, resistance r1 is equivalent to be connected in parallel on
Smart electronics well lid from machine equivalent resistance RL two ends.Owing to r1 is far smaller than from machine equivalent resistance RL,
So when r1 is connected in parallel on co-cable transmission bus two ends, the total impedance in loop is less than from machine equivalent resistance RL,
Can show that by Ohm's law U=IR the voltage of co-cable transmission bus diminishes.When audion BG1 ends,
Impedance becomes big, and co-cable transmission bus voltage raises.The fluctuation shape up and down of the voltage magnitude of co-cable transmission bus
Becoming an AC signal, this AC signal is transmitted in co-cable transmission bus as communication signal, altogether cable
Control the reception unit of main frame and the receiver module circuit from machine is responsible for extracting this AC signal, and by it
Corresponding host CPU is sent into or from machine CPU process after digitized.Smart electronics well lid from machine all
There is the geocoding of oneself, normally working from machine when, be at reception state, work as CPU
Detect that co-cable transmission bus impedance changes, all of single cable control main frame and all receive communication signal from machine,
Then check geocoding, if identical with the geocoding of oneself, then data are processed.
The invention has the beneficial effects as follows, present invention employs SCISMA/CD(Share based on single cable technique
Cable Impedance Sense Multiple Access/Collision Detection, cable conflict altogether
The impedance monitoring multiple access of detection) technology, it is achieved that power supply and data common cable are transmitted, it is possible to right
Well lid state is remotely monitored, and reports the abnormal information of well lid quickly, and according to single cable control master
The order of machine or remotely management master control system realizes the long-range action to well lid；Farthest transmission range is up to
10km, considerably beyond RS485 bus and the transmission range of various carrier-wave transmission, solves non-transformer situation
Under the problem that remotely monitors of underground pipe network tunnel raceway groove.The present invention can be widely applied for urban electric power,
Telecommunications, the well lid monitoring in underground pipe network tunnel, municipal.
Accompanying drawing explanation
The present invention is further described below in conjunction with the accompanying drawings:
Fig. 1 is the theory diagram of the present invention；
Fig. 2 is the theory diagram of single cable control main frame of the present invention；
Fig. 3 is the theory diagram from machine of the present invention；
Fig. 4 is the circuit diagram of the transmitter unit of single cable control main frame of the present invention and transmitter module from machine；
Fig. 5 is the reception unit of single cable control main frame of the present invention or the circuit diagram from the receiver module of machine；
Fig. 6 is the circuit diagram of constant-current source of the present invention.
Detailed description of the invention
As shown in Figure 1, Figure 2 and Figure 3, a kind of based on co-cable transmission the smart electronics well lid system of the present invention
System, it includes single cable control main frame, six tunnel co-cable transmission buses, some smart electronics well lids and remotely manages
Reason master control system, described single cable control main frame is arranged at transformer station or underground pipe network tunnel portal, its bag
Include host CPU, RS485 interface, RJ45 interface, power module, photoelectric isolating circuit, transmitter unit and
Receive unit, in order to the state of smart electronics well lid to be monitored and open and close controlling；Described co-cable transmission
Bus is arranged in underground pipe network tunnel, and is connected with single cable control main frame, each road co-cable transmission bus
It is made up of two low-smoke non-halogen flame-retardant communicaton and signal cables, and connection has several smart electronics well lids from machine；
Described smart electronics well lid parallel connection accesses co-cable transmission bus, smart electronics well lid include manhole cover body and
Be arranged on bottom manhole cover body from machine, described from machine include from machine CPU, receiver module, transmitter module,
Magnetic key operated lock, position sensor, acceleration transducer and energy-storage units, in order to be monitored manhole cover body
And monitoring information is sent to single cable control main frame by co-cable transmission bus, receive single cable control master simultaneously
The order of machine also makes corresponding action according to order；Described long-range management master control system by Ethernet with
Single cable control main frame connects.
As in figure 2 it is shown, described host CPU uses STM32L chip, respectively with RS485 interface, RJ45
Interface and power module connect, and described transmitter unit is connected with host CPU by photoelectric isolating circuit, and
It is connected with the receiver module from machine；Described reception unit is connected with host CPU by photoelectric isolating circuit,
And be connected with the transmitter module from machine；Described power module is constant pressure source, provides work for single cable control main frame
Make power supply.
STM32L chip is used from machine CPU, respectively with receiver module, transmitting mould as it is shown on figure 3, described
Block, magnetic key operated lock, position sensor, acceleration transducer and energy-storage units connect, and described receiver module leads to
Crossing co-cable transmission bus to be connected with the transmitter unit of single cable control main frame, described transmitter module is passed by common cable
Defeated bus is connected with the reception unit of single cable control main frame, and described magnetic key operated lock is arranged in manhole cover body, uses
To control the unlatching of manhole cover body；Described position sensor and acceleration transducer are arranged in manhole cover body,
In order to monitor the different condition of manhole cover body；Described energy-storage units cable transfer bus together connects, with thinking
Working power is provided from machine.
As shown in Figure 4, the transmitter unit of described single cable control main frame includes constant-current source H1 and EMC wave filter,
The input of described constant-current source H1 is connected with constant pressure source Vdc, and outfan is by co-cable transmission bus and intelligence
Electronic manhole cover connects from machine, and described smart electronics well lid accesses co-cable transmission bus from machine parallel connection；Described
EMC wave filter is arranged on the outfan of constant-current source H1.Described transmitter module includes audion Q1 and resistance
R1, described resistance r1 series connection audion Q1 after with smart electronics well lid from machine equivalent resistance RL form also
Connection circuit, described parallel circuit is serially connected in co-cable transmission bus line；The base stage of described audion Q1 with
Connect from machine CPU.Each road co-cable transmission bus of this smart electronics manhole cover system is provided with and Intelligent electric
The match circuit that sub-well lid is connected in parallel, described match circuit includes resistance RZ and the electric capacity CZ being connected in series.
As it is shown in figure 5, the reception unit of described single cable control main frame and the receiver module from machine all include electricity
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8,
Electric capacity C1, electric capacity C2, electric capacity C3, diode D1, diode D2 and CA3140 operational amplifier A 1；
One end of described electric capacity C1 is connected by the positive terminal of resistance R1 cable transfer bus together, the described other end
Respectively with one end, the positive pole of diode D1, the negative pole of diode D2 and the one of electric capacity C2 of resistance R2
End connects；The other end of described electric capacity C2 respectively with one end of resistance R3, one end of resistance R4, resistance
One end of R7 and the negative input end of operational amplifier A 1 connect；The positive input terminal of described operational amplifier A 1
Being connected with one end of resistance R5 and one end of resistance R6 respectively, positive electrical source is connected with+5V voltage, negative
Pole power end ground connection, outfan respectively with the other end of resistance R7, one end of resistance R8 and VOUT output
Point connects, and the output of VOUT output point is the digital communication signal in common cable bus, and this signal is sent into corresponding
CPU process；The other end of described resistance R8 is connected with+5V voltage；The two ends of described electric capacity C3 are respectively
It is connected with positive electrical source and the negative electricity source of operational amplifier A 1；The other end of described resistance R3 and
The other end of resistance R5 is connected with+5V voltage respectively；The other end of described resistance R2, diode D1
The other end of negative pole, the positive pole of diode D2, the other end of resistance R4 and resistance R6 cable the most together passes
Ground connection after the negative pole end connection of defeated bus.
As shown in Figure 6, this constant-current source H1 described in smart electronics manhole cover system include LM2576 chip U1,
Resistance R9, resistance R10, resistance R11, adjustable resistance RW, sample resistance R0, polar capacitor C4, pole
Property electric capacity C5, diode D3, diode D4, inductance L1 and LM393 dual power supply comparator IC1；Institute
The pin 1 stating LM2576 chip U1 is connected with positive pole and the VIN of polar capacitor C4 respectively, pin 2
It is connected with the negative pole of diode D3 and one end of inductance L1 respectively；The other end of described inductance L1 respectively with
The positive pole of polar capacitor C5 and one end of load resistance R connect；The other end of described load resistance R is respectively
It is connected with one end of sample resistance R0 and the pin 3 of LM393 dual power supply comparator IC1, described LM393
The pin 2 of dual power supply comparator IC1 is connected with one end of resistance R11 and one end of adjustable resistance RW respectively；
The other end of described resistance R11 is connected with one end of resistance R10 and the positive pole of diode D4 respectively；Described
The pin 1 of LM393 dual power supply comparator IC1 respectively with one end of resistance R10 and LM2576 chip U1
Pin 4 connects；The described other end of resistance R9, the other end of resistance R10 and LM393 dual power supply ratio
The pin 8 of relatively device IC1 is connected with positive pole VCC respectively；The described pin 3 of LM2576 chip U1, LM2576
The pin 5 of chip U1, the negative pole of polar capacitor C4, the negative pole of polar capacitor C5, diode D3 are just
Pole, the other end of sample resistance R0, the negative pole of diode D4, the drawing of LM393 dual power supply comparator IC1
Foot 4 and the other end of adjustable resistance RW and adjustable end ground connection respectively.Present invention uses a kind of high efficiency
Switch mode constant current power supply, a unique feature is to have the current-limiting protection relevant with the time, and this allows for
Can use in the case of load changes bigger and full load, and less generation heat.LM393 dual power supply ratio
Relatively device IC1 and sample resistance R0 constitutes constant current and current foldback circuit, when there is short trouble from machine altogether
Cable controls main frame and can automatically identify by measuring the magnitude of voltage at sample resistance R0 two ends and report to the police, it is achieved cable altogether
Control host power supply automatically to protect.
In order to realize quickly reporting exception, present invention employs SCISMA/CD(Share based on single cable technique
Cable Impedance Sense Multiple Access/Collision Detection, cable conflict altogether
The impedance monitoring multiple access of detection) method.Each smart electronics well lid joint in co-cable transmission bus
Point is to send the high impedance that all must monitor before infomational message in co-cable transmission bus for some time idle
State, once this idle condition is monitored to, then each smart electronics well lid node has the machine of equalization
Message can be sent.When two or more smart electronics subordinate computer node sends information simultaneously, node itself is first
Appearance conflict first can be detected, then take appropriate measures (priority) solves this conflict situations.
The message (address is little, and priority is high) that now priority is high first sends, and the message of low priority sends meeting
Suspend.SCISMA/CD method based on single cable technique to implement process as follows: if cable bus altogether
Free time presents high-impedance state, and any smart electronics well lid node can start to send message, has relatively Gao You
The unit first weighing message can obtain co-cable transmission bus access power, if 2 or the intelligence of more than 2
Electronic manhole cover appendent computer system starts simultaneously at transmission message, then just have co-cable transmission bus access conflict.
The most not losing in order to ensure message and time and can use mechanism of review, appraising period through discussion, each is sent out
Device is sent all the level sending position to be entered with monitored co-cable transmission bus level (being converted by impedance)
Row compares, if level is identical, then this unit can continue to send；If send is one " high resistant "
Level and monitor is one " low-resistance " level, then appendent computer system is just appraised through discussion and is exited, it is necessary to exit transmission
State.Being that step-by-step is carried out owing to appraising through discussion, this also implies that when co-cable transmission bus occurs sending conflict
Time, will not be affected by breath of delivering letters primary after appraising algorithm through discussion.All of appraise through discussion algorithm all without
Destroy the message information content that priority is high, also it will not be sent and produce any time delay.In order to ensure
The stability of communication employs Data Whitening technology and avoids continuous print in communication data " 0 " or " 1 ", this
Outer in order to ensure that the correctness of data employs " CRC " calibration technology.
Should smart electronics manhole cover system based on co-cable transmission mainly total by single cable control main frame, co-cable transmission
Line and smart electronics well lid are constituted, and single cable control main frame is by Ethernet with remotely management master control system even
Connect, to lower by co-cable transmission bus connect each smart electronics well lid from machine, co-cable transmission bus is
Single cable control main frame and each transmission medium between machine, each is responsible for smart electronics well lid state from machine
Monitoring and open and close controlling.Below to single cable control main frame, co-cable transmission bus and smart electronics well lid from
Machine describes in detail.
One, single cable control main frame
Single cable control main frame is arranged on transformer station, or the porch in underground pipe network tunnel, it is desirable to be provided that work
Making power supply, structure is 2U standard cabinet, convenient installation in rack, is responsible for upper and long-range management master control
System connects, and is connected from machine with each smart electronics well lid by co-cable transmission bus lower.Have following
Functional characteristics:
1, single cable control main frame has the co-cable transmission unit of six tunnel independences, concurrent and six pairs of bus communications.
2, up to 31 smart electronics well lid slave devices can be connected in a pair bus, running voltage DC48V,
20mA。
3, single cable control main frame provides RJ45 network interface to remotely management master control system, uses standard
TCP/IP communication.
4, single cable control main frame uses Phototube Coupling and electromagnetic isolation technology, improves system stability.
5, in a pair communication cable (￠ 0.5mm) bus, it is achieved power supply and data are transmitted, and transmit farthest
Distance is up to 10km.
6, remote power feeding and communication cable road altogether uses anti-interference and resist technology, should have good EMC
Electro Magnetic Compatibility, port output is provided with EMC wave filter, reduces the intensity of differential mode interference altogether, meet cable
Complicated electromagnetic interference environment in channel, it is ensured that communication is good.
Two, co-cable transmission bus
Co-cable transmission bus is made up of conventional low-smoke non-halogen flame-retardant communicaton and signal cable, a pair communication cable
On (￠ 0.5mm), realize power supply with direct current 48V low-voltage and data common cable is transmitted.Use cable
Model is generally: HYATZ5 × 2 × 0.5.
Three, smart electronics well lid is from machine
Smart electronics well lid provides power supply and communication media from machine by co-cable transmission bus, receives cable control altogether
The order of main frame processed, and make corresponding action according to order.And in manhole cover body, it is configured with position biography
Sensor and acceleration transducer, can identify that well lid leaves well head, well lid by judder, generation three-dimensional
The situations such as displacement, are considered as illegal invasion by case above, by co-cable transmission bus in active reporting mode
Reach single cable control main frame.It has a following functions feature:
1, smart electronics well lid is configured with position sensor and acceleration transducer from the well lid that machine is corresponding,
Can identify that well lid leaves well head, well lid by judder, the situations such as three-D displacement occur, and with actively
Reporting schemes reaches single cable control main frame.
2, magnetic key operated lock can be controlled and realize remote opening well lid.
Being somebody's turn to do smart electronics manhole cover system based on co-cable transmission, well lid state can be monitored, quickly by it
The abnormal information of active reporting well lid also realizes the long-range action of well lid according to co-cable transmission Host Command,
Play the effect of monitoring in real time；It is mainly characterized in that: power supply, control signal, monitoring signal, communication letter
The transmission of number common cable；Based on the technology reported quickly, find well lid abnormal conditions in real time the most in time
Dispose；Technology based on low-power consumption, failure tolerant ability, electromagnetism interference technology.
The above is the preferred embodiment of the present invention, for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these change
Enter and retouching is also regarded as protection scope of the present invention.
Claims (8)
1. smart electronics manhole cover system based on co-cable transmission, is characterized in that, including single cable control main frame, at least one tunnel co-cable transmission bus and some smart electronics well lids,
Described single cable control main frame is arranged at transformer station or underground pipe network tunnel portal, it includes host CPU, RS485 interface, RJ45 interface, power module, photoelectric isolating circuit, transmitter unit and reception unit, in order to be monitored the state of smart electronics well lid and open and close controlling；
Described co-cable transmission bus is arranged in underground pipe network tunnel, and is connected with single cable control main frame；
Described smart electronics well lid parallel connection accesses co-cable transmission bus, smart electronics well lid include manhole cover body and be arranged on bottom manhole cover body from machine, described include from machine CPU, receiver module, transmitter module, magnetic key operated lock, position sensor, acceleration transducer and energy-storage units from machine, in order to manhole cover body is monitored and monitoring information is sent to single cable control main frame by co-cable transmission bus, receive the order of single cable control main frame simultaneously and make corresponding action according to order；
Described host CPU is connected with RS485 interface, RJ45 interface and power module respectively, and described transmitter unit is connected with host CPU by photoelectric isolating circuit, and is connected with the receiver module from machine；Described reception unit is connected with host CPU by photoelectric isolating circuit, and is connected with the transmitter module from machine；Described power module is DC constant voltage source, provides working power for single cable control main frame；
Described it is connected with receiver module, transmitter module, magnetic key operated lock, position sensor, acceleration transducer and energy-storage units respectively from machine CPU, described receiver module is connected with the transmitter unit of single cable control main frame by co-cable transmission bus, described transmitter module is connected with the reception unit of single cable control main frame by co-cable transmission bus, described magnetic key operated lock is arranged in manhole cover body, in order to control the unlatching of manhole cover body；Described position sensor and acceleration transducer are arranged in manhole cover body, in order to monitor the different condition of manhole cover body；Described energy-storage units cable transfer bus together connects, and provides working power with thinking from machine；
Described transmitter unit includes DC constant current power supply H1 and EMC wave filter, the input of described DC constant current power supply H1 is connected with DC constant voltage source Vdc, outfan is connected from machine with smart electronics well lid by co-cable transmission bus, and described smart electronics well lid accesses co-cable transmission bus from machine parallel connection；Described EMC wave filter is arranged on the outfan of DC constant current power supply H1；
Described DC constant current power supply H1 includes LM2576 chip U1, resistance R9, resistance R10, resistance R11, adjustable resistance RW, sample resistance R0, polar capacitor C4, polar capacitor C5, diode D3, diode D4, inductance L1 and LM393 dual power supply comparator IC1；The pin 1 of described LM2576 chip U1 is connected with positive pole and the VIN of polar capacitor C4 respectively, and pin 2 is connected with the negative pole of diode D3 and one end of inductance L1 respectively；The other end of described inductance L1 is connected with the positive pole of polar capacitor C5 and one end of load resistance R respectively；The other end of described load resistance R is connected with one end of sample resistance R0 and the pin 3 of LM393 dual power supply comparator IC1 respectively, and the pin 2 of described LM393 dual power supply comparator IC1 is connected with one end of resistance R11 and one end of adjustable resistance RW respectively；The other end of described resistance R11 is connected with one end of resistance R10 and the positive pole of diode D4 respectively；The pin 1 of described LM393 dual power supply comparator IC1 is connected with one end of resistance R10 and the pin 4 of LM2576 chip U1 respectively；The pin 8 of the described other end of resistance R9, the other end of resistance R10 and LM393 dual power supply comparator IC1 is connected with positive pole VCC respectively；The described pin 3 of LM2576 chip U1, the pin 5 of LM2576 chip U1, the negative pole of polar capacitor C4, the negative pole of polar capacitor C5, the positive pole of diode D3, the other end of sample resistance R0, the negative pole of diode D4, the pin 4 of LM393 dual power supply comparator IC1 and the other end of adjustable resistance RW and adjustable end ground connection respectively.
Smart electronics manhole cover system based on co-cable transmission the most according to claim 1, it is characterized in that, described each road co-cable transmission bus is provided with the match circuit being connected in parallel with smart electronics well lid, and described match circuit includes resistance RZ and the electric capacity CZ being connected in series.
Smart electronics manhole cover system based on co-cable transmission the most according to claim 1, it is characterized in that, described transmitter module includes audion Q1 and resistance r1, described resistance r1 series connection audion Q1 after with smart electronics well lid from machine equivalent resistance RL form parallel circuit, described parallel circuit is serially connected in co-cable transmission bus line；The base stage of described audion Q1 is connected with from machine CPU.
Smart electronics manhole cover system based on co-cable transmission the most according to claim 1, it is characterized in that, the reception unit of described single cable control main frame and the receiver module from machine all include resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, electric capacity C1, electric capacity C2, electric capacity C3, diode D1, diode D2 and operational amplifier A 1；One end of described electric capacity C1 is connected by the positive terminal of resistance R1 cable transfer bus together, and described other end one end with one end, the positive pole of diode D1, the negative pole of diode D2 and the electric capacity C2 of resistance R2 respectively is connected；The other end of described electric capacity C2 negative input end with one end, one end of resistance R4, one end of resistance R7 and the operational amplifier A 1 of resistance R3 respectively is connected；The positive input terminal of described operational amplifier A 1 is connected with one end of resistance R5 and one end of resistance R6 respectively, and positive electrical source is connected with+5V voltage, negative power supply end ground connection, and outfan is connected with the other end, one end of resistance R8 and the VOUT output point of resistance R7 respectively；The other end of described resistance R8 is connected with+5V voltage；The two ends of described electric capacity C3 are connected with positive electrical source and the negative electricity source of operational amplifier A 1 respectively；The other end of described resistance R3 and the other end of resistance R5 are connected with+5V voltage respectively；Ground connection after the negative pole end connection of the other end of the other end of described resistance R2, the negative pole of diode D1, the positive pole of diode D2, the other end of resistance R4 and resistance R6 cable transfer bus the most together.
Smart electronics manhole cover system based on co-cable transmission the most according to claim 4, is characterized in that, described operational amplifier A 1 includes CA3140 operational amplifier.
6. according to the smart electronics manhole cover system based on co-cable transmission described in any one of claim 1-5, it is characterized in that, also include remotely managing master control system, described long-range management master control system is connected with single cable control main frame by Ethernet.
7. according to the smart electronics manhole cover system based on co-cable transmission described in any one of claim 1-5, it is characterized in that, described co-cable transmission bus includes six tunnel co-cable transmission buses, and described each road co-cable transmission bus connects has several smart electronics well lids from machine；Described each road co-cable transmission bus is made up of two low-smoke non-halogen flame-retardant communicaton and signal cables.
8. according to the smart electronics manhole cover system based on co-cable transmission described in any one of claim 1-5, it is characterized in that, described host CPU and all use STM32L chip from machine CPU.
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