CN109061292A - A kind of wireless street lamp micro-base station electric energy metering device and connection method - Google Patents
A kind of wireless street lamp micro-base station electric energy metering device and connection method Download PDFInfo
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- CN109061292A CN109061292A CN201810702493.1A CN201810702493A CN109061292A CN 109061292 A CN109061292 A CN 109061292A CN 201810702493 A CN201810702493 A CN 201810702493A CN 109061292 A CN109061292 A CN 109061292A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
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Abstract
The present invention provides a kind of wireless street lamp micro-base station electric energy metering device and connection method, which includes power injection interface, equipment electrical interface, loop power supply output/external current sample multiplexing functions interface, AC/DC power module, voltage sampling circuit, current sampling circuit 1, current sampling circuit 2, electric energy computation chip, electrical energy measurement calibration terminal, equipment power switch, current sample mode selector, CPU processor, wireless communication module, radio antenna.The electric energy metering device and connection method are in addition to can be other than load to each street lamp on street lamp and electricity consumption be managed, additionally it is possible to effectively be loaded to various kinds of equipment of the carry on street lamp post and power consumption management.
Description
Technical field
The present invention relates to Internet of Things, road lighting field, specially a kind of wireless street lamp micro-base station electric energy metering device with
And connection method.
Background technique
Since street lamp post has city density and the convenient characteristic of powering, in internet of things field and road lighting field,
There is producer to start with the convenience of lamp stand power supply carry air borne sensor, camera, display screen etc. on street lamp post each
Kind Internet of Things screen component, these Internet of Things screen components all take electricity from lamp stand route using the simple mode of connection, do not consider lamp stand
The load capacity of power supply line, the problem of causing lamp stand power supply line overload that route is caused to burn, happen occasionally.
There is part of the manufacturer in order to guarantee that the electrical equipment of carry on street lamp post installs breaker and switch controller additional, still
These devices are all to work independently, and during lamp stand loop power supply, all devices while electrifying startup cause starting current mistake
Power supply line's failure problems are caused greatly.
Since street lighting belongs to social public resource, the street lighting electricity charge are by government finance according in Street lamps control cabinet
Ammeter continuous data carries out unified payment, but the electricity consumption of the equipment consumption of carry can reach street lamp use on street lamp post
As many as 40% of electricity, can not to these it is additional carry out effective quantitative statistics with electric consumption, lead to public social resources
Serious waste.
These defects mentioned above have become technical problem urgently to be solved.
Summary of the invention
The present invention devises a kind of wireless street lamp micro-base station electric energy metering device and connection method.
Present invention employs following technical solutions:
A kind of electric energy metering device, the electric energy metering device include power injection interface, equipment electrical interface, loop power supply
Output/external current sample multiplexing functions interface, radio antenna, it is characterised in that: power injection interface, for power supply
Exchange input, the power injection interface connect the firewire, protecting field, zero curve of supply input with tri- pins of L, E, N respectively；
Equipment electrical interface, for giving the equipment being managed to be powered and electrical energy measurement, the equipment electrical interface has L, E, N
Three pins provide the access of firewire, protecting field, zero curve to managed devices respectively；Loop power supply output/external current sample
Multiplexing functions interface is connected for the loop power supply output in built-in tandem type connection method, and for external mutual-inductor type
The connection of external current transformer in method.
Further, the electric energy metering device further includes AC/DC power module, voltage sampling circuit, current sample electricity
Road 1, current sampling circuit 2, electric energy computation chip, electrical energy measurement calibration terminal, equipment power switch, current sample model selection
Device, CPU processor, wireless communication module.
Further, the loop power supply output/external current sample multiplexing functional interface has L/S+, E/S-, N tri-
A pin when as loop power supply output function, provides the access of firewire, protecting field, zero curve to next stage managing device respectively,
When as external current sample function, for connecting S+, S- of external current transformer.
Further, the current sample mode selector by 1,2,3 totally 3 short-circuited terminals form, pass through such as lower section
The selection of current sample mode is realized in method connection；Connection 1, No. 1 terminal phase of firewire L pin and selection device of power injection interface
Connection；Connection 2, No. 2 terminals of selection device are multiple by current sampling circuit 2 and loop power supply output/external current sample function
With the L/S+ connection of interface；Connection 3, the protecting field E pin of power injection interface is connected with No. 3 terminals of selection device, simultaneously
It is connected with loop power supply output/external current sample multiplexing functions interface E/S-；Connection 4, the zero curve N of power injection interface draws
Foot is connected with loop power supply output/external current sample multiplexing functions interface N.
Further, the current sample mode in the built-in tandem type connection method include: 1) selection device be shorted 1,2
Number terminal；2) electric energy input firewire L connected with No. 1 terminal of selection device, by after 2 terminals through overcurrent sample circuit 2
The firewire pin L connection of power supply to the device output interface, is powered input, the confession of junior's power supply unit to junior's power supply unit
Electricity is connected by zero curve N with the zero curve N pin of loop power supply output interface after overload, loop power supply output interface zero curve
N is connected with electric energy input zero curve N, forms the circuit to power to junior's power supply unit；3) it is powered back by 2 Duis of current sampling circuit
Road carries out electric current conversion, then inputs to electric energy computation chip and carries out electrical energy measurement.
Further, the current sample mode in external mutual-inductor type connection method include: 1) selection device be shorted 2,3
Number terminal；2) after external D.C mutual-inductor detects the high current on external cable, by the S+ of external current transformer and external
The S+ pin of current sample interface is connected, and is then attached by No. 2 terminals of current sampling circuit 2 and selection device,
It is connected by No. 3 terminals of selection device with the S- pin of external current sample interface, and is drawn by external current sample S-
Foot is connected with the S- of external D.C mutual-inductor, forms external current detection circuit；3) by current sampling circuit 2 to current detecting
Circuit carries out electric current conversion, then inputs to electric energy computation chip and carries out electrical energy measurement.
Further, the loop power supply output/external current sample multiplexing functions interface is as external current sample function
When energy, external D.C mutual-inductor S- is drawn by the S-/E pin of external current sample interface and the protecting field E of power injection interface
Foot is connected.
Further, the current sampling circuit 1, the current signal of the load equipment for connecting equipment with electrical interface
Signal conversion is carried out, using 1 milliohm high precision sampling resistance, current signal is converted into voltage signal and is input to RN8209D electricity
Energy sampling A/D chip carries out the acquisition of current signal；The current sampling circuit 2, in built-in tandem type connection method, being used for will
The subsequent current signal for electric loading of loop power supply output interface connection carries out signal conversion, in external mutual-inductor type connection side
In method, for the current signal of external current transformer to be carried out signal conversion, the current signal of conversion is inputed into electric energy
Metering chip carries out current sample；The current sampling circuit 2 carries out electric current using high precision current transformer TA1005-1M
Isolation sampling is then input to the acquisition that RN8209D electric energy sampling chip carries out current signal.
Further, the alternating voltage of supply input is carried out signal conversion by the voltage sampling circuit, and the voltage is adopted
Sample circuit divides sampled voltage using 0.1% precision resister, is then input to RN8209D electric energy sampling chip
Carry out the acquisition of voltage signal.
Further, the CPU processor, by carrying out communicating completion equipment electrical interface and return with electric energy computation chip
Road carries out statistics and valve for electricity output/external current sample multiplexing functions interface electrical energy measurement, and by the energy data of metering
Value judgement controls the power supply that pin cuts off electrical equipment by IO if being more than preset threshold；The CPU processor uses
The acquisition and statistics of the electric current, voltage, electric energy of STM32F103RC arm processor finishing device.
Further, the electric energy computation chip, by voltage sampling circuit, current sampling circuit 1, current sample electricity
The voltage and current signal that road 2 inputs is sampled, and electrical equipment interface and loop power supply output/external current sample function are completed
The electrical energy measurement of energy multiplex interface；The electric energy computation chip passes through binary channels electrical energy measurement function using RN8209D chip
Complete equipment electrical interface and loop power supply output/external current sample multiplexing functional interface input electrical energy measurement.
Further, the wireless communication module, according to the instruction of CPU processor, module is by electric energy by wireless communication
The electric current of metering device, voltage, consumption energy data by wireless communication antenna transmission to administrative department；The wireless communication
Module completes the communication with other electric energy metering devices or managing main frame using SX1278 wireless data transfer module.
A kind of built-in tandem type connection method of electric energy metering device, the built-in tandem type connection is based on by multistage electric energy
Amount device connects, which is characterized in that the connection method includes: the electric energy that 1) supply input connects the first electric energy metering device
Input interface completes the supply input of the first electric energy metering device；2) the equipment power supply interface connection of the first electric energy metering device
First electrical equipment completes the power supply management of the first electrical equipment；3) loop power supply output/external current sample multiplex interface
It is used in built-in tandem type connection method as loop power supply output interface, the loop power supply output of the first electric energy metering device
Interface connects the power injection interface of the second electric energy metering device, is powered input to the second electric energy metering device；Second electricity
The equipment power supply interface of energy metering device connects the second electrical equipment, and the electrical energy measurement for completing the second electrical equipment counts；
4) power injection interface of the loop power supply output interface connection third electric energy metering device of the second electric energy metering device, gives third
Electric energy metering device is powered input；And so on, complete the electrical energy measurement of N electric energy metering device and N electrical equipment
Statistics.
Further, the electric energy metering device is in the application of the first electrical equipment, and the equipment power switch is using silent
Normally closed mode is recognized, so that the first electrical equipment default being managed is received by CPU processor and wirelessly referred in power supply state
Time-of-the-day order inside order or CPU processor carries out the switch control of the first electrical equipment.
Further, the electric energy metering device is in the electric energy measuring management of progress second to N electrical equipment, equipment
Power switch is using normally opened mode is defaulted, so that the electrical equipment being managed is in an off state in cable power supply, only
CPU processor receives the instruction of the timer inside wireless instructions or CPU processor, just opens and goes forward side by side to power supply for electrical equipment
Row electrical energy measurement.
A kind of external mutual-inductor type connection method of the electric energy metering device, which is characterized in that the connection method packet
Include: 1) the exchange input interface of the first electric energy metering device is articulated on service cable, gives the first electric energy meter by service cable
Measure device power supply；2) equipment of the first electric energy metering device connects the first electrical equipment with electrical interface, for completing the first electricity consumption
The power supply management of equipment；3) one first is accessed behind power supply line's connector of the first electric energy metering device on service cable
Current transformer, for the subsequent power supply load current of detection cable and the electric energy of stoichiometric consumption；4) loop power supply output/external electricity
Stream sampling multiplex interface uses in external mutual-inductor type connection method as external current sample interface, the first electrical energy measurement dress
The external current sample interface set connects the first current transformer, for detecting the size of current at the first current transformer；5)
The exchange input interface of second electric energy metering device is articulated in behind the first current transformer, the confession before the second current transformer
On electrical cables；6) equipment of the second electric energy metering device connects the second electrical equipment with electrical interface, sets for managing the second electricity consumption
The electric energy of standby consumption；7) the second current transformer detection is mounted on behind the power supply wire terminal of the second electric energy metering device, is used for
Detect the load current of the subsequent electrical equipment of the second electric energy metering device and the electric energy of consumption；And so on, third electric energy meter
Amount device to N electric energy metering device is respectively used to the electrical energy measurement of management third electrical equipment to N electrical equipment, third electricity
Current transformer is used to detect load current and electrical energy measurement thereafter to N current transformer.
Further, the electric energy metering device is in the application of the first electrical equipment, and the equipment power switch is using silent
Normally closed mode is recognized, so that the first electrical equipment default being managed is received by CPU processor and wirelessly referred in power supply state
Time-of-the-day order inside order or CPU processor carries out the switch control of the first electrical equipment.
Further, the electric energy metering device is in the electric energy measuring management of progress second to N electrical equipment, equipment
Power switch is using normally opened mode is defaulted, so that the electrical equipment being managed is in an off state in cable power supply, only
CPU processor receives the instruction of the timer inside wireless instructions or CPU processor, just opens and goes forward side by side to power supply for electrical equipment
Row electrical energy measurement.
The beneficial effects of the present invention are: the electric energy metering device and connection method are in addition to can be to each road on street lamp
The load of lamp and electricity consumption are managed outer, additionally it is possible to various kinds of equipment of the carry on street lamp post carry out effective load and
Power consumption management.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the structural block diagram of electric energy metering device；
Fig. 2 is the schematic diagram of built-in tandem type connection；
Fig. 3 is the schematic diagram of external mutual-inductor type connection；
Fig. 4 is the electrical block diagram of electric energy metering device；
Fig. 5 is the structural schematic diagram of current sample mode selector；
Fig. 6 is the structural schematic diagram of built-in cascade current sampling；
Fig. 7 is the structural schematic diagram of external transformer current sampling；
Fig. 8 is the structural schematic diagram of external transformer current sampling protecting field；
The invention will be further described with reference to the accompanying drawings and embodiments.
Specific embodiment
Present invention is further described in detail With reference to embodiment:
The present invention is managed the equipment of carry on lamp stand and is completed by a wireless street lamp micro-base station electric energy metering device,
The present invention is referred to as electric energy metering device for convenience, by wireless street lamp micro-base station power supply management device.
Fig. 1 is the structural block diagram of electric energy metering device.The electric energy metering device includes: power injection interface, equipment electricity consumption
Totally 4 parts form for interface, loop power supply output/external current sample multiplex interface, radio antenna.
The present invention is completed to carry out electrical energy measurement to the equipment of carry on street lamp post by multiple devices, according to the electricity consumption of management
The load total current of equipment is of different sizes, and electric energy metering device is divided into for electrically connected method: 1) tandem type built in connects；2) outside
Connect mutual-inductor type connection, totally 2 kinds of connection methods.
Loop power supply output/external current sample multiplex interface of the invention is a multifunctional multiplexing interface；It is born always
When carrying power≤1KW, using built-in tandem type connection method, loop power supply output/external current sample multiplex interface is used as back
Road power supply output function, for completing the power supply management of carry equipment on street lamp post；In total load power > 1KW, use
External mutual-inductor type connection method, loop power supply output/external current sample multiplex interface is as external current sample function, outside
Connect the electrical energy measurement that external current sampling mutual inductor realizes large power-consuming equipment.
Fig. 2 is the schematic diagram of built-in tandem type connection.The built-in tandem type connection is for connecting multistage electric energy metering device
It picks up and, specifically include:
1) supply input connects the power injection interface of the first electric energy metering device, completes the confession of the first electric energy metering device
Electricity input；
2) the equipment power supply interface of the first electric energy metering device connects the first electrical equipment, such as street illumination lamp is (such as
Shown in figure), the power supply management of street illumination lamp is completed, realizes that streetlamp foundation illuminates electrical energy measurement；
3) loop power supply output/external current sample multiplex interface is used as loop power supply in built-in tandem type connection method
Output interface uses, and the loop power supply output interface of the first electric energy metering device connects the electric energy input of the second electric energy metering device
Interface is powered input to the second electric energy metering device；The equipment power supply interface connection second of second electric energy metering device is used
The electrical equipment A (as shown in the figure) of carry in electric equipment, such as street lamp post, for completing the electrical energy measurement of the second electrical equipment
Statistics；
4) the electric energy input of the loop power supply output interface connection third electric energy metering device of the second electric energy metering device connects
Mouthful, input is powered to third electric energy metering device；
And so on, complete the electrical energy measurement statistics of N electric energy metering device and N electrical equipment.
In built-in tandem type connection method of the invention, one electricity consumption of equipment power supply interface management of electric energy metering device is set
Standby, first electric energy metering device completes the electrical energy measurement statistics of street illumination lamp；Loop power supply output interface is completed below
Cascade all electric energy metering devices and the electrical energy measurement of electrical equipment statistics.
Fig. 3 is the schematic diagram of external mutual-inductor type connection.The external mutual-inductor type connection method in current supply circuit for setting
Standby bearing power is more than the application scenarios of the electrical energy measurement statistics of 1KW, is specifically included:
1) the exchange input interface of the first electric energy metering device is articulated on service cable, by service cable to the first electricity
It can metering device power supply；
2) equipment of the first electric energy metering device connects the first electrical equipment with electrical interface, such as street illumination lamp is (such as
Shown in figure), for completing the power supply management of street illumination lamp, realize that streetlamp foundation illuminates electric energy quantitative statistics；
3) it is mutual that first electric current is accessed behind power supply line's connector of the first electric energy metering device on service cable
Sensor, for the subsequent power supply load current of detection cable and the electric energy of stoichiometric consumption；
4) loop power supply output/external current sample multiplex interface is used as external electricity in external mutual-inductor type connection method
It flows Sampling Interface to use, the external current sample interface of the first electric energy metering device connects the first current transformer, for detecting
Size of current at first current transformer；
5) the exchange input interface of the second electric energy metering device be articulated in behind the first current transformer, the second Current Mutual Inductance
On service cable before device；
6) equipment of the second electric energy metering device electrical interface connects the second electrical equipment, such as user equipment A (as schemed
It is shown), for managing the electric energy of electrical equipment A consumption；
7) the second current transformer detection is mounted on behind the power supply wire terminal of the second electric energy metering device, for detecting the
The load current of the subsequent electrical equipment of two electric energy metering devices and the electric energy of consumption；
And so on, third electric energy metering device to N electric energy metering device is respectively used to management third electrical equipment extremely
The electrical energy measurement of N electrical equipment, third current transformer to N current transformer are used to detect load current and electricity thereafter
It can metering.
In external mutual-inductor type connection method of the invention, each electric energy metering device completes what equipment was accessed with electrical interface
The electrical energy measurement and statistics of electrical equipment, current transformer management be all electrical equipments load thereafter electrical energy measurement and system
Meter.
Fig. 4 is the electrical block diagram of electric energy metering device.The electric energy metering device includes power injection interface, equipment
With electrical interface, loop power supply output/external current sample multiplexing functions interface, AC/DC power module, voltage sampling circuit, electricity
Flow sample circuit 1, current sampling circuit 2, electric energy computation chip, electrical energy measurement calibration terminal, equipment power switch, current sample
Mode selector, CPU processor, wireless communication module, radio antenna.Wherein:
1, power injection interface, the exchange for power supply input, and the power injection interface has tri- pins of L, E, N
The firewire, protecting field, zero curve of supply input are connect respectively；
2, equipment electrical interface, for giving the equipment being managed to be powered and electrical energy measurement, the equipment electrical interface,
With tri- pins of L, E, N, the access of firewire, protecting field, zero curve is provided to managed devices respectively；
3, loop power supply output/external current sample multiplexing functions interface, for returning in built-in tandem type connection method
Road is for electricity output, and for the connection of the external current transformer in external mutual-inductor type connection method；The loop power supply
Output/external current sample is multiplexed functional interface, has tri- pins of L/S+, E/S-, N, when as loop power supply output function,
The access of firewire, protecting field, zero curve is provided to next stage managing device respectively, when as external current sample function, for connecting
Meet S+, S- of external current transformer；
4, AC/DC power module, for AC power source to be converted to DC power supply, to other electricity in electric energy metering device
Road and module provide working power；
5, the alternating voltage of supply input is carried out signal conversion by voltage sampling circuit, in order to electric energy computation chip into
Row voltage sample, the voltage sampling circuit divide sampled voltage using 0.1% precision resister, then input
The acquisition of voltage signal is carried out to RN8209D electric energy sampling chip；
6, current sampling circuit 1, the current signal of the load equipment for connecting equipment with electrical interface carry out signal and turn
It changes, in order to which electric energy computation chip carries out current sample；
It is defeated to be converted into voltage signal using 1 milliohm high precision sampling resistance by the current sampling circuit 1 for current signal
Enter to RN8209D electric energy sampling chip to carry out the acquisition of current signal；
7, current sampling circuit 2, in built-in tandem type connection method, after connecting loop power supply output interface
The continuous current signal for electric loading carries out signal conversion, in order to which electric energy computation chip carries out current sample, in external mutual inductor
It is for the current signal of external current transformer to be carried out signal conversion, the current signal of conversion is defeated in formula connection method
Enter and carries out current sample to electric energy computation chip；
The current sampling circuit 2 carries out being galvanically isolated sampling using high precision current transformer TA1005-1M, then
It is input to the acquisition that RN8209D electric energy sampling chip carries out current signal；
8, electric energy computation chip, by being inputted to voltage sampling circuit, current sampling circuit 1, current sampling circuit 2
Voltage and current signal is sampled, and electrical equipment interface and loop power supply output/external current sample multiplexing functions interface are completed
Electrical energy measurement；
The electric energy computation chip is completed equipment electricity consumption by binary channels electrical energy measurement function and is connect using RN8209D chip
Mouth and loop power supply output/external current sample multiplexing functional interface input electrical energy measurement；
9, electrical energy measurement calibration terminal passes through the electricity to the terminal outputting standard in electric energy metering device production process
Energy calibration signal carries out the calibration of the measuring accuracy of electric energy metering device；
10, equipment power switch controls the power switch of signal management equipment electrical interface by CPU processor IO；
The equipment power switch is powered control using HF152F relay, completes to be no more than 5A current flow devices
Power supply management.
11, current sample mode selector is used for built-in tandem type connection method and external mutual-inductor type connection method
The selection of middle current sample mode；
12, CPU processor completes equipment electrical interface and loop power supply is defeated by communicate with electric energy computation chip
Out/external current sample multiplexing functions interface electrical energy measurement, and the energy data of metering is subjected to statistics and threshold values judges, if
More than preset threshold, then the power supply that pin cuts off electrical equipment is controlled by IO；
The CPU processor, using the acquisition of the electric current of STM32F103RC arm processor finishing device, voltage, electric energy
And statistics；
13, wireless communication module, according to the instruction of CPU processor, module is by electric energy metering device by wireless communication
Electric current, voltage, consumption energy data by wireless communication antenna transmission to administrative department；
The wireless communication module, using SX1278 wireless data transfer module complete with other electric energy metering devices or
The communication of managing main frame；
14, radio antenna, transmitting and reception for wireless signal.
Electric energy metering device of the invention when the first order carries out street lighting electric energy measuring management, is adopted by equipment power switch
With normally closed mode is defaulted, so that the illuminator default being managed is received by CPU processor and is wirelessly referred in power supply state
Time-of-the-day order inside order or CPU processor carries out the switch control of illuminator.
Electric energy metering device of the invention when carrying out the electric energy measuring management of other electrical equipments, is adopted by equipment power switch
With normally opened mode is defaulted, so that the electrical equipment being managed is in an off state in cable power supply, only CPU processor is connect
The timer instruction inside wireless instructions or CPU processor is received, is just opened and is powered to power load equipment and carry out electric energy
Metering.
Each electric energy metering device of the invention uses Time-sharing control to the unlatching power supply of power load equipment, avoids simultaneously
The problem of unlatching power supply is carried out to power load equipment, causes current supply circuit starting current excessive and burns power supply line appearance；
When the electric energy of the consumption of power load equipment is excessive, or the electric energy consumed has been more than the threshold values set in CPU processor,
CPU processor controls load equipment power switch by control signal wire, disconnects the power supply to power load equipment.
Fig. 5 is the structural schematic diagram of current sample mode selector.Electric current in electric energy metering device of the invention is adopted
Sample mode selector by 1,2,3 totally 3 short-circuited terminals form, pass through following connection type realize current sample mode choosing
It selects, connection type are as follows: 1) the firewire L pin of power injection interface is connected with No. 1 terminal of selection device；2) selection device 2
Terminal is connected by current sampling circuit 2 with loop power supply output/external current sample multiplexing functions interface L/S+；3) electric energy
The protecting field E pin of input interface is connected with No. 3 terminals of selection device, at the same with loop power supply output/external current sample
The E/S- connection of multiplexing functions interface；4) the zero curve N pin of power injection interface and loop power supply output/external current sample function
The N connection of energy multiplex interface.
Loop power supply output/external current sample multiplexing functions interface is as two kinds of function in electric energy metering device of the invention
It can be multiplexed: when 1) as loop power supply output function, there is firewire L, tri- protecting field E, zero curve N pins；2) as external electricity
When flowing sampling functions, there are two pins of external mutual inductor S+, S-；Firewire L when the present invention is by loop power supply output function and
Mutual inductor S+ is multiplexed on a pin when external current sample function, protecting field E when by loop power supply output function and outer
Mutual inductor S- is multiplexed on a pin when setting current sample function.
Fig. 6 is the structural schematic diagram of built-in cascade current sampling.The loop power supply output of electric energy metering device of the invention/
Current sample mode when external current sample multiplexing functions interface is as loop power supply output function are as follows: 1, selection device be shorted 1,
No. 2 terminals；2, electric energy input firewire L connected with No. 1 terminal of selection device, by after 2 terminals through overcurrent sample circuit 2
The firewire pin L connection of power supply to the device output interface, is powered input, the confession of junior's power supply unit to junior's power supply unit
Electricity is connected by zero curve N with the zero curve N pin of loop power supply output interface after overload, loop power supply output interface zero curve
N is connected with electric energy input zero curve N, forms the circuit to power to junior's power supply unit；3, it is powered back by 2 Duis of current sampling circuit
Road carries out electric current conversion, then inputs to electric energy computation chip and carries out electrical energy measurement.
Fig. 7 is the structural schematic diagram of external transformer current sampling.The loop power supply of electric energy metering device of the invention is defeated
Current sample mode when out/external current sample multiplexing functions interface is as external current sample function are as follows: 1, selection device it is short
Connect 2, No. 3 terminals；2, after external D.C mutual-inductor detects the high current on external cable, by the S+ of external current transformer and
The S+ pin of external current sample interface is connected, and is then connected by No. 2 terminals of current sampling circuit 2 and selection device
It connects, is connected by No. 3 terminals of selection device with the S- pin of external current sample interface, and pass through external current sample S-
Pin is connected with the S- of external D.C mutual-inductor, forms external current detection circuit；3, electric current is examined by current sampling circuit 2
Survey time road carries out electric current conversion, then inputs to electric energy computation chip and carries out electrical energy measurement.
Fig. 8 is the structural schematic diagram of external transformer current sampling protecting field.The circuit of electric energy metering device of the invention
When for electricity output/external current sample multiplexing functions interface as external current sample function, external D.C mutual-inductor S- passes through
The S-/E pin of external current sample interface is connected with the protecting field E pin of power injection interface, avoids external AC mutual induction
The appearance of device high-voltage pulse signal, the safety accident for avoiding result in the person and equipment occur.
External mutual-inductor type connection method of the invention is detecting that load current in service cable and bearing power are super
When crossing cable load capacity or predetermined current threshold values, it is first shut off the electrical equipment of electric energy metering device equipment electrical interface
Power supply, to protect the power supply safety of service cable, then antenna transfinites load current and bearing power announcement by wireless communication
Police is sent in other devices, other devices is notified to cut off the power supply of the electrical equipment of the equipment electrical interface of itself, to guarantee
The power supply safety of service cable.
Electric energy metering device of the invention when the first order carries out street lighting electric energy measuring management, is adopted by equipment power switch
With normally closed mode is defaulted, so that the illuminator default being managed is received by CPU processor and is wirelessly referred in power supply state
Time-of-the-day order inside order or CPU processor carries out the switch control of illuminator.
Electric energy metering device of the invention when carrying out the electric energy measuring management of other electrical equipments, is adopted by equipment power switch
With normally opened mode is defaulted, so that the electrical equipment being managed is in an off state in cable power supply, only CPU processor is connect
The timer instruction inside wireless instructions or CPU processor is received, is just opened and is powered to power load equipment and carry out electric energy
Metering
Each electric energy metering device of the invention uses Time-sharing control to the unlatching power supply of power load equipment, avoids simultaneously
The problem of unlatching power supply is carried out to power load equipment, causes current supply circuit starting current excessive and burns power supply line appearance；
When the electric energy of the consumption of power load equipment is excessive, or the electric energy consumed has been more than the threshold values set in CPU processor,
CPU processor controls load equipment power switch by control signal wire, disconnects the power supply to power load equipment.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (18)
1. a kind of wireless street lamp micro-base station electric energy metering device, which includes power injection interface, equipment electricity consumption
Interface, loop power supply output/external current sample multiplexing functions interface, radio antenna, it is characterised in that:
Power injection interface, the exchange for power supply input, and there are the power injection interface tri- pins of L, E, N to connect respectively
Firewire, protecting field, the zero curve of supply input；
Equipment electrical interface, for being powered to the equipment that is managed and electrical energy measurement, the equipment electrical interface, have L,
E, tri- pins of N provide the access of firewire, protecting field, zero curve to managed devices respectively；
Loop power supply output/external current sample multiplexing functions interface, for the loop power supply in built-in tandem type connection method
Output, and for the connection of the external current transformer in external mutual-inductor type connection method.
2. electric energy metering device according to claim 1, it is characterised in that:
The electric energy metering device further includes AC/DC power module, voltage sampling circuit, current sampling circuit 1, current sample electricity
Road 2, electric energy computation chip, electrical energy measurement calibration terminal, equipment power switch, current sample mode selector, CPU processing
Device, wireless communication module.
3. electric energy metering device according to claim 1 or 2, it is characterised in that:
The loop power supply output/external current sample multiplexing functional interface has tri- pins of L/S+, E/S-, N, as circuit
When output function of powering, the access of firewire, protecting field, zero curve is provided to next stage managing device respectively, is adopted as external electric current
When sample function, for connecting S+, S- of external current transformer.
4. electric energy metering device according to claim 2, it is characterised in that:
The current sample mode selector by 1,2,3 totally 3 short-circuited terminals form, by the following method connection realize electric current
The selection of sampling configuration；
Connection 1, the firewire L pin of power injection interface is connected with No. 1 terminal of selection device；
Connection 2, No. 2 terminals of selection device pass through current sampling circuit 2 and loop power supply output/external current sample multiplexing functions
The L/S+ connection of interface；
Connection 3, the protecting field E pin of power injection interface is connected with No. 3 terminals of selection device, while defeated with loop power supply
The E/S- connection of out/external current sample multiplexing functions interface；
Zero curve N pin and loop power supply output/external current sample multiplexing functions interface N of connection 4, power injection interface connect
It connects.
5. electric energy metering device according to claim 2, which is characterized in that the electricity in the built-in tandem type connection method
Flowing sample mode includes:
1) selection device is shorted 1, No. 2 terminal；2) the firewire L of electric energy input is connected with No. 1 terminal of selection device, passes through 2 point ends
Through the firewire pin L connection of 2 power supply to the device output interface of overcurrent sample circuit after son, it is powered to junior's power supply unit
Input, the power supply of junior's power supply unit are connected by zero curve N with the zero curve N pin of loop power supply output interface after overload
It connects, loop power supply output interface zero curve N is connected with electric energy input zero curve N, forms the circuit to power to junior's power supply unit；3) lead to
Overcurrent sample circuit 2 carries out electric current conversion to current supply circuit, then inputs to electric energy computation chip and carries out electrical energy measurement.
6. electric energy metering device according to claim 2, which is characterized in that the electric current in external mutual-inductor type connection method
Sample mode includes:
1) selection device is shorted 2, No. 3 terminals；It 2), will be external after external D.C mutual-inductor detects the high current on external cable
The S+ of current transformer is connected with the S+ pin of external current sample interface, then by current sampling circuit 2 and selection dress
No. 2 terminals set are attached, and are connected by No. 3 terminals of selection device with the S- pin of external current sample interface, and
It is connected by external current sample S- pin with the S- of external D.C mutual-inductor, forms external current detection circuit；3) pass through electricity
It flows sample circuit 2 and electric current conversion is carried out to current detection circuit, then input to electric energy computation chip and carry out electrical energy measurement.
7. electric energy metering device according to claim 1 or 2, it is characterised in that:
When the loop power supply output/external current sample multiplexing functions interface is as external current sample function, external exchange
Mutual inductor S- is connected by the S-/E pin of external current sample interface with the protecting field E pin of power injection interface.
8. electric energy metering device according to claim 2, it is characterised in that:
The current signal of the current sampling circuit 1, the load equipment for connecting equipment with electrical interface carries out signal conversion,
Using 1 milliohm high precision sampling resistance, current signal is converted into voltage signal and is input to the progress of RN8209D electric energy sampling chip
The acquisition of current signal；
The current sampling circuit 2, it is subsequent for connecting loop power supply output interface in built-in tandem type connection method
Signal conversion is carried out for the current signal of electric loading, in external mutual-inductor type connection method, for by external Current Mutual Inductance
The current signal of device carries out signal conversion, and the current signal of conversion is inputed to electric energy computation chip and carries out current sample；
The current sampling circuit 2 is carried out being galvanically isolated sampling using high precision current transformer TA1005-1M, then be inputted
The acquisition of current signal is carried out to RN8209D electric energy sampling chip.
9. electric energy metering device according to claim 2, it is characterised in that:
The alternating voltage of supply input is carried out signal conversion by the voltage sampling circuit, and the voltage sampling circuit uses
0.1% precision resister divides sampled voltage, is then input to RN8209D electric energy sampling chip and carries out voltage signal
Acquisition.
10. electric energy metering device according to claim 2, it is characterised in that:
The CPU processor completes equipment electrical interface and loop power supply output/outer by communicate with electric energy computation chip
The electrical energy measurement of current sample multiplexing functions interface is set, and the energy data of metering is subjected to statistics and threshold values judgement, if being more than
Preset threshold then controls the power supply that pin cuts off electrical equipment by IO；
The CPU processor, using the electric current of STM32F103RC arm processor finishing device, voltage, the acquisition of electric energy and system
Meter.
11. electric energy metering device according to claim 2, it is characterised in that:
The electric energy computation chip passes through the voltage inputted to voltage sampling circuit, current sampling circuit 1, current sampling circuit 2
Current signal is sampled, and electrical equipment interface and loop power supply output/external current sample multiplexing functions interface electricity are completed
It can metering；
The electric energy computation chip, using RN8209D chip, by binary channels electrical energy measurement function complete equipment electrical interface and
Loop power supply output/external current sample multiplexing functional interface input electrical energy measurement.
12. electric energy metering device according to claim 2, it is characterised in that:
The wireless communication module, according to the instruction of CPU processor, module is by the electricity of electric energy metering device by wireless communication
Stream, voltage, consumption energy data by wireless communication antenna transmission to administrative department；
The wireless communication module is completed and other electric energy metering devices or management using SX1278 wireless data transfer module
The communication of host.
13. a kind of built-in tandem type of wireless street lamp micro-base station electric energy metering device as described in one of claim 1 to 12 connects
Method is connect, the built-in tandem type connection is for connecting multistage electric energy metering device, which is characterized in that the connection method packet
It includes:
1) supply input connects the power injection interface of the first electric energy metering device, and the power supply for completing the first electric energy metering device is defeated
Enter；
2) the first electric energy metering device equipment power supply interface connect the first electrical equipment, complete the first electrical equipment for fulgurite
Reason；
3) loop power supply output/external current sample multiplex interface exports in built-in tandem type connection method as loop power supply
Interface uses, and the electric energy input that the loop power supply output interface of the first electric energy metering device connects the second electric energy metering device connects
Mouthful, input is powered to the second electric energy metering device；The equipment power supply interface of second electric energy metering device connects the second electricity consumption
Equipment, the electrical energy measurement for completing the second electrical equipment count；
4) power injection interface of the loop power supply output interface connection third electric energy metering device of the second electric energy metering device, gives
Third electric energy metering device is powered input；
And so on, complete the electrical energy measurement statistics of N electric energy metering device and N electrical equipment.
14. built-in tandem type connection method according to claim 13, it is characterised in that:
The electric energy metering device is in the application of the first electrical equipment, the equipment power switch mode normally closed using default,
So that the first electrical equipment default being managed receives wireless instructions by CPU processor or CPU is handled in power supply state
Time-of-the-day order inside device carries out the switch control of the first electrical equipment.
15. built-in tandem type connection method according to claim 13, it is characterised in that:
In the electric energy measuring management of progress second to N electrical equipment, equipment power switch uses the electric energy metering device
Default normally opened mode, so that the electrical equipment being managed is in an off state in cable power supply, only CPU processor is received
Timer instruction inside to wireless instructions or CPU processor, just opens to power supply for electrical equipment and carries out electrical energy measurement.
16. a kind of external mutual-inductor type of the wireless street lamp micro-base station electric energy metering device as described in one of claim 1 to 12
Connection method, which is characterized in that the connection method includes:
1) the exchange input interface of the first electric energy metering device is articulated on service cable, gives the first electric energy meter by service cable
Measure device power supply；
2) equipment of the first electric energy metering device connects the first electrical equipment with electrical interface, for completing the confession of the first electrical equipment
Fulgurite reason；
3) first current transformer is accessed behind power supply line's connector of the first electric energy metering device on service cable,
For the subsequent power supply load current of detection cable and the electric energy of stoichiometric consumption；
4) loop power supply output/external current sample multiplex interface is adopted in external mutual-inductor type connection method as external electric current
Sample interface uses, and the external current sample interface of the first electric energy metering device connects the first current transformer, for detecting first
Size of current at current transformer；
5) the exchange input interface of the second electric energy metering device is articulated in behind the first current transformer, before the second current transformer
On the service cable in face；
6) equipment of the second electric energy metering device connects the second electrical equipment with electrical interface, for managing the consumption of the second electrical equipment
Electric energy；
7) the second current transformer detection is mounted on behind the power supply wire terminal of the second electric energy metering device, for detecting the second electricity
It can the load current of the subsequent electrical equipment of metering device and the electric energy of consumption；
And so on, third electric energy metering device to N electric energy metering device is respectively used to management third electrical equipment to N use
The electrical energy measurement of electric equipment, based on load current and electric energy of the third current transformer to N current transformer by detecting thereafter
Amount.
17. external mutual-inductor type connection method according to claim 16, it is characterised in that:
The electric energy metering device is in the application of the first electrical equipment, the equipment power switch mode normally closed using default,
So that the first electrical equipment default being managed receives wireless instructions by CPU processor or CPU is handled in power supply state
Time-of-the-day order inside device carries out the switch control of the first electrical equipment.
18. external mutual-inductor type connection method according to claim 16, it is characterised in that:
In the electric energy measuring management of progress second to N electrical equipment, equipment power switch uses the electric energy metering device
Default normally opened mode, so that the electrical equipment being managed is in an off state in cable power supply, only CPU processor is received
Timer instruction inside to wireless instructions or CPU processor, just opens to power supply for electrical equipment and carries out electrical energy measurement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810702493.1A CN109061292A (en) | 2018-06-30 | 2018-06-30 | A kind of wireless street lamp micro-base station electric energy metering device and connection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810702493.1A CN109061292A (en) | 2018-06-30 | 2018-06-30 | A kind of wireless street lamp micro-base station electric energy metering device and connection method |
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| CN109061292A true CN109061292A (en) | 2018-12-21 |
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| CN108756503A (en) * | 2018-07-23 | 2018-11-06 | 江苏恒宝智能系统技术有限公司 | A kind of electronic lock with electric energy metering device |
| CN115420942A (en) * | 2022-11-04 | 2022-12-02 | 浙江正泰物联技术有限公司 | Electric energy measuring device and power supply system |
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Application publication date: 20181221 |