CN105973313B - Electric automobile charging pile safety monitoring system based on fiber grating - Google Patents
Electric automobile charging pile safety monitoring system based on fiber grating Download PDFInfo
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- CN105973313B CN105973313B CN201610537691.8A CN201610537691A CN105973313B CN 105973313 B CN105973313 B CN 105973313B CN 201610537691 A CN201610537691 A CN 201610537691A CN 105973313 B CN105973313 B CN 105973313B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B19/00—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
Abstract
The present invention proposes a kind of electric automobile charging pile safety monitoring system based on fiber grating, including fiber-optic probe optical cable and signal demodulation analysis system；Together with fiber-optic probe optical cable is directly integrated with the existing communications optical cable of electric automobile charging pile；Multiple fiber-optic grating sensors, including pressure sensor, vibrating sensor and temperature sensor are concatenated on fiber-optic probe optical cable；Signal demodulation analysis system includes signal demodulation module, housing on off state monitoring modular, tamper-proof monitoring modular and temperature monitoring module；Signal demodulation module, it is connected with fiber-optic probe optical cable, the sequence of positions of the wave crest signal of the different fiber-optic grating sensors returned according to fiber-optic probe optical cable judges the signal classification belonging to each wave crest, and various types of signal is demodulated according to corresponding demodulation mode, all kinds of demodulated signals are sent to corresponding monitoring modular afterwards；Respective demodulated signal compared with preset value, if exceeding preset value, is sent alarm signal by each monitoring modular.
Description
Technical field
The present invention relates to a kind of charging pile safety monitoring field, more particularly to a kind of electric automobile based on fiber grating to fill
Electric stake safety monitoring system.
Background technology
The development of automobile causes the excessive consumption of earth resource.The tellurian energy is limited, and energy scarcity is complete
Facing mankind it is increasingly severe the problem of.The energy problem in China has become the strategic issue of the national economic development, if
Continue according to traditional energy power system development, it may be difficult to continue the rise of this vast automobile superpower of China.Face
Resource scarcity and environmental protection problem, Development of EV become the main trend of automobile industry development.
The development key of electric automobile is the development of charging technique.The appearance of electric automobile charging pile can not only solve
The problem of electric automobile charges whenever and wherever possible, additionally it is possible to safeguarded to power battery.Electric automobile charging pile is most of at present
Positioned at unattended region, so being a problem to be solved to charging pile safety monitoring in itself and maintenance.
Fiber grating sensing technology is the wireless sensor networks that developed recently gets up, and a variety of different physical quantities can be carried out
Monitoring (including：Temperature, strain, pressure, displacement, pressure, acceleration etc.), have passive explosion-proof, the weather-proof lightning protection in scene, safety can
Lean on, the advantage such as service life length, high sensitivity, wide range of measurement, networking capability are strong, be highly suitable to be applied for safety monitoring neck
Domain.
Fiber grating sensing technology is combined with the actual monitored demand of electric automobile charging pile, designs a kind of full light
Fine monitoring system, can be to the different kinds of parameters such as charging pile internal operating temperature, housing state, and the destruction of electric automobile charging pile
Strick precaution etc. is monitored on-line, will promote the lifting of electric automobile charging pile monitoring operation and management level.
The content of the invention
The present invention is in the prior art to charging pile safety monitoring in itself and the defects of safeguard deficiency, there is provided Yi Zhong electricity
The technical solution of electrical automobile charging pile safety monitoring, the program utilizes fiber grating sensing technology, to electric automobile charging pile
Every state parameter is monitored in real time, to provide timely security information.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of electric automobile charging pile safety monitoring system based on fiber grating is provided, including fiber-optic probe optical cable and
Signal demodulation analysis system；
Concatenate multiple fiber-optic grating sensors on the fiber-optic probe optical cable, including pressure sensor, vibrating sensor and
Temperature sensor；
Signal demodulation analysis system includes signal demodulation module, housing on off state monitoring modular, tamper-proof monitoring mould
Block and temperature monitoring module；
The signal demodulation module, the wave crest signal of the different fiber-optic grating sensors returned according to fiber-optic probe optical cable
Sequence of positions judges the signal classification belonging to each wave crest, and various types of signal is demodulated according to corresponding demodulation mode, it
All kinds of demodulated signals are sent to corresponding monitoring modular afterwards；
Respective demodulated signal compared with preset value, if exceeding preset value, is sent alarm by each monitoring modular
Signal.
In electric automobile charging pile safety monitoring system of the present invention based on fiber grating, the housing switchs shape
The pressure detection signal that state monitoring modular receiving signal demodulation module is sent, and compared with pre-set pressure threshold T1
Compared with if certain point institute pressure measurement force value is less than T1, then it is assumed that charging pile housing is opened or loosens at this time, and system sends corresponding report
Alert signal.
In electric automobile charging pile safety monitoring system of the present invention based on fiber grating, the housing switchs shape
Housing status monitoring manual switch is provided with state monitoring modular, if manually being overhauled, closes the housing status monitoring hand
Dynamic switch, to avoid unnecessary alarm is triggered.
In electric automobile charging pile safety monitoring system of the present invention based on fiber grating, the tamper-proof monitoring
The vibration detecting signal that module receiving signal demodulation module is sent, and compared with pre-set vibration detecting signal amplitude T2
Compared with if more than T2, progress signal mode identification, it is artificial malicious sabotage or environmental disturbances to judge disturbing signal.
In electric automobile charging pile safety monitoring system of the present invention based on fiber grating, in signal mode identification
Used recognizer includes thresholding algorithm, similarity measurement, neutral net, decision tree and support vector machines.
In electric automobile charging pile safety monitoring system of the present invention based on fiber grating, the temperature monitoring mould
The temperature detection signal that block receiving signal demodulation module is sent, and compared with pre-set temperature threshold T3, when certain prison
When measuring point measured temperature value is higher than T3, then charging pile operating temperature is excessive, and system sends corresponding alarm signal；When charging pile work
Make temperature and exceed threshold value certain time, then send linkage instruction to charging pile control circuit, control charging pile stops externally charging.
In electric automobile charging pile safety monitoring system of the present invention based on fiber grating, fiber grating reflected light
Centre wavelength be with strain and the relational expression of temperature change：
In formula, Δ λBFor the knots modification of fiber grating reflection wavelength；ε is along the strain in optical fiber direction at fiber grating；ΔT
For the variable quantity of temperature；p11And p12For the elasto-optical coefficient of fiber grating；μ is the Poisson's ratio of fiber optic materials；αδAnd ξδFor optical fiber material
The thermal coefficient of expansion and thermo-optical coeffecient of material；The changing value of strain and temperature is calculated by the knots modification of wavelength.
In electric automobile charging pile safety monitoring system of the present invention based on fiber grating, which further includes use
Family monitoring client, receives the information that housing on off state monitoring modular, tamper-proof monitoring modular, temperature monitoring module are sent and display
Picture is monitored, which is directly displayed by the form of figure, word, report.
In electric automobile charging pile safety monitoring system of the present invention based on fiber grating, pressure sensor is with filling
The shell cover of electric stake housing is connected；Vibrating sensor is fixed on charging pile case inside；Temperature sensor is close to inside charging pile
Circuit.
The beneficial effect comprise that：The present invention is using all -fiber monitoring system, and sensing probe is simple in structure, size
It is small, flexible flexing laying can be carried out according to installation environment, convenient later maintenance and can be simultaneous well with existing communication optical cable
Hold.And it is passive outside sensing optic cable room, weather-proof lightning protection, electromagnetism interference, electric spark will not be produced during the work time, will not be to quilt
The safety of monitoring object causes extra threat.The present invention can be to the thing of a variety of Safety Influence Factors of electric automobile charging pile
Reason amount is monitored and analyzed, and carries out early warning exactly to unusual condition, simultaneously as the measurement of different kinds of parameters can share
Optical cable and host device, reduce the complexity and maintenance difficulty of electric automobile charging pile monitoring device.
Brief description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is electric automobile charging pile safety monitoring system structure chart of the embodiment of the present invention based on fiber grating；
Fig. 2 is electric automobile charging pile structure diagram of the embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
The present invention utilizes fiber grating sensing technology, and every state parameter of electric automobile charging pile is supervised in real time
Survey, to provide timely security information.
Electric automobile charging pile safety monitoring system of the embodiment of the present invention based on fiber grating includes fiber-optic probe optical cable
And signal demodulation analysis system.
Together with fiber-optic probe optical cable is directly integrated with the existing communications optical cable of electric automobile charging pile.
Concatenate multiple fiber-optic grating sensors on the fiber-optic probe optical cable of the embodiment of the present invention, including pressure sensor, shake
Dynamic sensor and temperature sensor.
Signal demodulation analysis system includes signal demodulation module, housing on off state monitoring modular, tamper-proof monitoring mould
Block and temperature monitoring module.
The signal demodulation module, is connected with fiber-optic probe optical cable, the different optical fiber light returned according to fiber-optic probe optical cable
The sequence of positions of the wave crest signal of gate sensor judges the signal classification belonging to each wave crest, and according to corresponding demodulation mode pair
Various types of signal is demodulated, and all kinds of demodulated signals are sent to corresponding monitoring modular afterwards.
Respective demodulated signal compared with preset value, if exceeding preset value, is sent alarm by each monitoring modular
Signal.
As shown in Fig. 2, pressure sensor is connected with the shell cover of charging pile housing；Vibrating sensor is fixed on charging pile housing
Inner side；Temperature sensor is close to the circuit inside charging pile.
The housing on off state monitoring modular, the pressure detection signal that receiving signal demodulation module is sent, according to reality
Situation, sets pressure threshold T1.If certain point institute pressure measurement force value is less than T1, then it is assumed that charging pile housing is opened or loose at this time
Dynamic, system should send corresponding alarm signal.Housing status monitoring manual switch is provided with the module, if manually maintenance,
Housing state monitoring switch should be closed in advance, avoid triggering unnecessary alarm.
The tamper-proof monitoring modular, the vibration detecting signal that receiving signal demodulation module is sent, when signal amplitude exceedes
Threshold value T2, then proceed by signal mode identification, it is artificial malicious sabotage or environmental disturbances (such as large car to judge disturbing signal
Larger vibration caused by process).Recognizer used may be selected：Thresholding algorithm, similarity measurement, neutral net, decision tree,
Support vector machines isotype recognizer.T2 can artificially be set according to actual conditions.
The temperature monitoring module, the temperature detection signal that receiving signal demodulation module is sent, according to actual conditions, is set
Temperature threshold T3 (recommended values：50℃).When certain monitoring point measured temperature value is higher than T3, then it is assumed that charging pile operating temperature is excessive,
System sends corresponding alarm signal.When charging pile operating temperature exceedes threshold value certain time (recommended value：60s), should be to charging
Stake control circuit sends linkage instruction, makes charging pile stop externally charging.The module can also set temperature status monitoring from dynamic circuit breaker
Electric switch, when charging pile operating temperature reaches certain time more than threshold value, charging pile will be automatically powered off to ensure safety.
As shown in Figure 1, the system of the embodiment of the present invention further includes user monitoring end, for receiving the monitoring of housing on off state
The information that module, tamper-proof monitoring modular, temperature monitoring module are sent, monitoring picture are direct in the form of figure, word, report etc.
Display.Consult and handle in time for user.
The vibration detecting signal that tamper-proof monitoring modular receiving signal demodulation module is sent, setting vibration threshold are T2, when
Signal amplitude exceedes threshold value T2, then proceeds by signal mode identification, judges that disturbing signal is artificial malicious sabotage or large-scale
Vehicle is by caused vibration.Recognizer used may be selected：Thresholding algorithm, similarity measurement, neutral net, decision tree, branch
Hold vector machine isotype recognizer.
It can gather in advance：The vibration signal and vehicle of weight impact charging pile housing are each by caused vibration signal sample
From some groups, sample storehouse is formed.The sample of signal of known class in measured signal and sample storehouse is subjected to similarity measure respectively.
If measured signal exceedes half with number of the similarity of certain class known sample more than 0.5, measured signal is classified as such.If
It is unsatisfactory for this condition, then it is assumed that be unknown classification, preserve this segment data in case analysis.
The fiber-optic probe optical cable of the present invention becomes one with fibre-optic telecommunication cable, and real-time monitoring signals pass through Communication ray
Cable is passed back, after system is demodulated and analyzes to return signal, judges whether to send corresponding safety alarm.Optical fiber grating sensing
Optical cable can be directly integrated with the existing communications optical cable of electric automobile charging pile, such as with the hollow remaining fibre core of communications optical cable directly into
Row concatenation welding, has higher technical feasibility.
Multiple fiber-optic grating sensors, including pressure sensor, vibrating sensor, temperature are serially connected with fiber-optic probe optical cable
Sensor, is concatenated in a fixed order.
Mounting means schematic diagram is specifically shown in Fig. 2, but not limited to this kind mounting means.
The mounting means of fiber bragg grating pressure sensor 21：It is connected with the shell cover of charging pile housing.
The mounting means of optical fiber raster vibration sensor 22：It is fixed on charging pile case inside.
The mounting means of fiber-optical grating temperature sensor 23：The circuit being close to inside charging pile.
Mounting means schematic diagram is specifically shown in Fig. 2, but not limited to this kind mounting means.
If charging pile can be incited somebody to action equipped with communications optical cable by the use of the hollow remaining fibre core of communications optical cable as transmission cable
Fibre optical sensor (sensing optic cable) concatenation is entered, if in addition the vacant fibre core do not reserved in advance, can arrange transmission cable, i.e.,
A piece single mode optical fiber.Since fiber-optic grating sensor itself is small (being exactly an optical cable from the appearance), and due to light
The physical characteristic of cable in itself, therefore can flexibly flexing lay.
Fiber grating pressure, temperature, vibrating sensor are positioned over position appropriate inside charging pile i.e. according to the actual requirements
Can, it is relatively independent system in fact with charging pile.Pressure sensor should be positioned over the position that charging pile shell cover is easily opened,
Vibrating sensor should be positioned over the position (such as bottom) that charging pile is most susceptible to impact failure, and temperature sensor, which should be positioned over, to be filled
Electric rifle cable and near circuitry, easy to thermometric., can be by single mode optical fiber (i.e. transmission cable) due to being fiber grating class sensor
Directly concatenate.
The signal demodulation module, according to the sequence of positions of close echo peak-to-peak signal, (concatenation of fiber-optic grating sensor is suitable
Sequence), judge the signal classification (pressure, vibration, temperature) belonging to each wave crest, and according to corresponding demodulation mode to various types of signal
It is demodulated.Various types of signal is sent to corresponding research and application module afterwards.
Specific demodulation mode is as follows：
The extraneous measured change of mobile sensing that Fiber Bragg Grating FBG passes through optical grating reflection wavelength.When broadband light is in light
When being transmitted in fibre, meet that the light of the wavelength of Bragg condition is reflected.The cycle of grating and effective refractive index can change reflection
The wavelength of light.And the change that screen periods and effective refractive index are led to variables such as temperature is strained, so as to using light
Fine Bragg grating carries out sensing measurement to these physical descriptors.The centre wavelength of fiber grating reflected light becomes with strain and temperature
The relational expression of change is：
In formula, Δ λBFor the knots modification of fiber grating reflection wavelength；ε is along the strain in optical fiber direction at fiber grating；ΔT
For the variable quantity of temperature；p11And p12For the elasto-optical coefficient of fiber grating；μ is the Poisson's ratio of fiber optic materials；αδAnd ξδFor optical fiber material
The thermal coefficient of expansion and thermo-optical coeffecient of material.Therefore, the changing value of strain and temperature can be obtained by wavelength variable quantity.
When fiber grating is only affected by temperature, its centre wavelength variation delta λBResponse to temperature change can be with
It is expressed as：
When fiber grating effect only strained, its centre wavelength variation delta λBResponse to strain can represent
For：
Measured since the physical quantitys such as acceleration, power can be converted into strain, so measurement vibration and pressure are applicable in
Formula (3).
The present invention gives full play to fiber grating sensing technology electromagnetism interference, electric insulation, corrosion-resistant, security is good, the service life
It is long, it is easy to networking, the advantages that telemeasurement.Realized using fiber grating sensing technology and electric automobile charging pile housing is switched
State, tamper-proof, the real time on-line monitoring of the different kinds of parameters such as operating temperature, to influencing each of electric automobile charging pile safe operation
Item index carries out real-time analysis and evaluation；Simultaneously as the measurement of different kinds of parameters can share optical cable and host device, electricity is reduced
The complexity and maintenance difficulty of electrical automobile charging pile monitoring device.
The electric automobile charging pile safety monitoring method realized according to the present invention, can obtain following beneficial effect：
(1) safety monitoring method of electric automobile charging pile of the present invention, system, sensing probe are monitored using all -fiber
Simple in structure, size is small, and flexible flexing laying, convenient later maintenance and energy and existing communication can be carried out according to installation environment
Optical cable compatible with.
(2) passive outside sensing optic cable room, weather-proof lightning protection, electromagnetism interference, will not produce electric spark, no during the work time
Extra threat can be caused to the safety of monitored target, and the write-in technique of grating is more ripe, easy to form scale life
Production.
(3) safety monitoring method of electric automobile charging pile of the present invention, can be to the more of electric automobile charging pile
The physical quantity of kind Safety Influence Factors is monitored and analyzed, and carries out early warning exactly to unusual condition, simultaneously as a variety of
The measurement of parameter can share optical cable and host device, reduce complexity and the maintenance of electric automobile charging pile monitoring device
Difficulty.
(4) monitoring picture is directly displayed in the form of figure, word, report etc., can timely feedback monitoring result.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (9)
1. a kind of electric automobile charging pile safety monitoring system based on fiber grating, it is characterised in that including fiber-optic probe light
Cable and signal demodulation analysis system；
Multiple fiber-optic grating sensors, including pressure sensor, vibrating sensor and temperature are concatenated on the fiber-optic probe optical cable
Sensor；
Signal demodulation analysis system include signal demodulation module, housing on off state monitoring modular, tamper-proof monitoring modular and
Temperature monitoring module；
The signal demodulation module, is connected with fiber-optic probe optical cable, and the different fiber gratings returned according to fiber-optic probe optical cable pass
The sequence of positions of the wave crest signal of sensor judges the signal classification belonging to each wave crest, and according to corresponding demodulation mode to all kinds of
Signal is demodulated, and all kinds of demodulated signals are sent to corresponding monitoring modular afterwards；
Respective demodulated signal compared with preset value, if exceeding preset value, is sent alarm signal by each monitoring modular.
2. the electric automobile charging pile safety monitoring system according to claim 1 based on fiber grating, it is characterised in that
The pressure detection signal that the housing on off state monitoring modular receiving signal demodulation module is sent, and with pre-set pressure
Threshold value T1 is compared, if certain point institute pressure measurement force value is less than T1, then it is assumed that charging pile housing is opened or loosens at this time, system
Send corresponding alarm signal.
3. the electric automobile charging pile safety monitoring system according to claim 2 based on fiber grating, it is characterised in that
Housing status monitoring manual switch is provided with the housing on off state monitoring modular, if manually being overhauled, closing should
Housing status monitoring manual switch, to avoid unnecessary alarm is triggered.
4. the electric automobile charging pile safety monitoring system according to claim 1 based on fiber grating, it is characterised in that
The vibration detecting signal that the tamper-proof monitoring modular receiving signal demodulation module is sent, and believe with pre-set vibration detecting
Number amplitude T2 is compared, if more than T2, carries out signal mode identification, it is artificial malicious sabotage or ring to judge disturbing signal
Disturb in border.
5. the electric automobile charging pile safety monitoring system according to claim 4 based on fiber grating, it is characterised in that
Recognizer employed in signal mode identification includes thresholding algorithm, similarity measurement, neutral net, decision tree and support
Vector machine.
6. the electric automobile charging pile safety monitoring system according to claim 1 based on fiber grating, it is characterised in that
The temperature detection signal that the temperature monitoring module receiving signal demodulation module is sent, and with pre-set temperature threshold T3 into
Row compares, and when certain monitoring point measured temperature value is higher than T3, then charging pile operating temperature is excessive, and system sends corresponding alarm signal
Number；When charging pile operating temperature exceedes threshold value certain time, then sending linkage to charging pile control circuit instructs, and controls charging pile
Stop externally charging.
7. the electric automobile charging pile safety monitoring system according to claim 1 based on fiber grating, it is characterised in that
The centre wavelength of fiber grating reflected light is with strain and the relational expression of temperature change：
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In formula, Δ λBFor the knots modification of fiber grating reflection wavelength；ε is along the strain in optical fiber direction at fiber grating；Δ T is temperature
The variable quantity of degree；p11And p12For the elasto-optical coefficient of fiber grating；μ is the Poisson's ratio of fiber optic materials；αδAnd ξδFor fiber optic materials
Thermal coefficient of expansion and thermo-optical coeffecient；The changing value of strain and temperature is calculated by the knots modification of wavelength.
8. the electric automobile charging pile safety monitoring system according to claim 1 based on fiber grating, it is characterised in that
The system further includes user monitoring end, receives housing on off state monitoring modular, tamper-proof monitoring modular, temperature monitoring module hair
Come information and show monitoring picture, which is directly displayed by the form of figure, word, report.
9. the electric automobile charging pile safety monitoring system according to claim 1 based on fiber grating, it is characterised in that
Pressure sensor is connected with the shell cover of charging pile housing；Vibrating sensor is fixed on charging pile case inside；Temperature sensor is tight
Paste the circuit inside charging pile.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610537691.8A CN105973313B (en) | 2016-07-08 | 2016-07-08 | Electric automobile charging pile safety monitoring system based on fiber grating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610537691.8A CN105973313B (en) | 2016-07-08 | 2016-07-08 | Electric automobile charging pile safety monitoring system based on fiber grating |
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| CN105973313A CN105973313A (en) | 2016-09-28 |
| CN105973313B true CN105973313B (en) | 2018-05-01 |
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| CN108072444A (en) * | 2016-11-14 | 2018-05-25 | 中科锐电（北京）科技有限公司 | A kind of collision checking method for electrically-charging equipment |
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| US11336662B2 (en) * | 2018-11-21 | 2022-05-17 | Abb Schweiz Ag | Technologies for detecting abnormal activities in an electric vehicle charging station |
| CN111650461B (en) * | 2020-06-22 | 2021-05-11 | 成都艾默泰克科技有限公司 | Charging pile testing system and testing method thereof |
| CN112134615B (en) * | 2020-09-22 | 2021-08-24 | 上海欣诺通信技术股份有限公司 | Monitoring system, method, terminal and readable storage medium based on optical fiber link |
| CN112532315B (en) * | 2021-02-07 | 2021-04-30 | 湖北鑫英泰系统技术股份有限公司 | Optical cable fault positioning method and device based on distributed temperature measurement optical fiber |
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2016
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