CN104075661B - Method for monitoring overhead tube bus displacement - Google Patents
Method for monitoring overhead tube bus displacement Download PDFInfo
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- CN104075661B CN104075661B CN201410132927.0A CN201410132927A CN104075661B CN 104075661 B CN104075661 B CN 104075661B CN 201410132927 A CN201410132927 A CN 201410132927A CN 104075661 B CN104075661 B CN 104075661B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 37
- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims description 30
- 238000004891 communication Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 5
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- 239000004065 semiconductor Substances 0.000 claims description 2
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Abstract
The invention relates to a method for monitoring overhead tube bus displacement and provides a supporting type overhead tube bus displacement monitoring device and a monitoring method. Infrared laser is transmitted to a reflector through a laser infrared distance measurement sensor, a distance between a tube bus end and a laser head is measured, and the tube bus horizontal displacement amount is measured through calculation. A calculation formula is (shown in description). The supporting type overhead tube bus displacement online monitoring method can check thermal-stretching cold-contraction change data and a curve of a tube bus within a time period on the ground in real time, establish a mathematic model, perform pre-warning on stuck phenomena occurred between the bus and a wire clamp and between an expansion joint and the wire clamp due to thermal stretching and cold contraction of the tube bus and detect whether the tube bus can freely perform thermal stretching and cold contraction on the wire clamp or not.
Description
Technical field
The present invention relates to brace type cross-over pipe mother's system for monitoring displacement.
Background technology
The most unmanned of high voltage substation, power station has multistage pipe female, and pipe mother is in Different climate（As high temperature and heating summer, sleet
Frost）Under the influence of be moved due to expanding with heat and contract with cold, pipe is female to produce friction with bracket, and the support porcelain vase of lower section can be led to be subject to
To larger stress, shorten porcelain vase service life.
The existing method that pipe mother's displacement is monitored mainly is passed through to install homemade graduated disc and pointer instruction pipe
Female position, carries out artificial observation.Because pipe mother position is higher, and it is in strong electric field environment it is considered to safety factorss, adopt more
Telescope is observed to pointer indicating graduation.But artificial observation is vulnerable to the impact of weather, energy when wet weather and snowy day
Degree of opinion low it is impossible to effectively be observed, and certainty of measurement can only be accurate to grade by this mode.Due to observation inconvenience, number
Density according to record is not also high.
Chinese patent is entitled《A kind of power pipe bus dilation monitoring device and method》, Publication No. CN
103363879 A, disclose power pipe bus dilation monitoring device and include movement conversion mechanism and for fixing whole
The fixed seat of device, movement conversion mechanism includes drive rod and rotary shaft, and rotary shaft one end is fixed with pointer after passing through a dial plate,
When promoting described drive rod displacement, pointer rotates together with described rotary shaft.Equally do not solve above-mentioned technical problem yet.
The domestic at present electronic automatic measurement still not having instrument to enable pipe mother's displacement, record and teletransmission, even people
Work is monitored, also no perfect management document and early warning mechanism.
Content of the invention
The present invention provides a kind of measuring method being capable of the accurate female displacement of measurement pipe.There is provided a kind of electronization automatically to survey simultaneously
Amount, record and teletransmission, pipe mother's heat stretches shrinkage and dieback phenomenon carries out the monitoring method of pre-alarm.
The technical scheme is that：A kind of method for monitoring cross-over pipe mother's displacement, including：By laser
, to reflector iraser, the distance between measurement pipe female end head and laser head, then by calculating for infrared distance sensor
Just the step recording pipe mother's horizontal displacement；Calculate formula be：d=(vt-s)*cos(arcsinh/s)
Wherein v:Laser propagation speed t:The time v that laser is propagated in atmosphere is given data, h represent send out
Luminous point to laser probe is irradiated to the vertical dimension between the laser spots on reflecting plate；S represent laser probe to reflecting plate it
Between distance；T is testing data.
Present invention additionally comprises：（1）Main control-processing unit module is used for outside real-time control laser ranging module, passes through
RS485 bus connects each assist control, processing unit module, and each pipe mother's displacement is sent to master control by optical fiber
Indoor industrial computer machine receives the step that ranging data is analyzed；
（2）Assist control processing unit module is used for timely control pipe mother's monitoring point for displacement laser ranging module, processes phase
Close the step that data is sent to main control, processing unit module in real time the situation of change of displacement；（3）Laser ranging mould
Block is used for pipe mother's displacement is carried out with real time record the step that data is sent to control unit；（4）Temperature and humidity measurement
Module is used for the humiture of a real-time monitoring environment, and temperature-humidity signal is passed through fiber-optic communications traffic to control, processing unit
Step；Industrial computer is used for reception and transmits, by main control unit, the data come, and preserves data, sets up document；Analysis number
According to resultant curve figure simultaneously shows；When pipe mother's displacement exceedes safety value, the step producing alarm signal；Wherein said
Main control-processing unit module and described assist control processing unit module, described main control, described processing unit
Adopt between module and described laser ranging module, described assist control processing unit module and laser ranging module
RS485 communicates, and adopts fiber optic communication between described main control-processing unit module and described temperature and humidity measurement module.
The data that brace type cross-over pipe mother's displacement monitor of the present invention records through laser fixed point is accurate, and error amount is little,
Climate, Changes in weather impact little.If 20s measures once, just there is laser to export when controlling measurement, laser ranging can be extended
The service life of sensor.
Brace type cross-over pipe mother's displacement on-line monitoring system can be in the female warm within a period of time of ground real time inspection pipe
Stretch shrinkage delta data, curve, set up mathematical model, between bus and wire clamp, between telescopic joint and wire clamp because pipe mother's heat is stretched
Shrinkage and dieback phenomenon carries out pre-alarm, whether detection pipe mother can stretch shrinkage by free underground heat on wire clamp.
Brief description
Fig. 1 is brace type cross-over pipe mother's displacement lasers monitoring device schematic diagram of the present invention；Fig. 2 is the present invention
Brace type cross-over pipe mother's displacement lasers monitoring pipe mother's horizontal displacement schematic diagram；Fig. 3 is laser controller theory diagram；
Fig. 4 is laser circuit overcurrent protection schematic diagram；Fig. 5 is control system mastery routine software flow pattern；On Fig. 6 is
Position machine software flow pattern；Fig. 7 control panel software system schematic diagram；Fig. 8 is system the general frame；In figure labelling：
1 generating laser, 2 laser-bounce plate 3 pipe is female.
Specific embodiment
The technical solution adopted for the present invention to solve the technical problems includes two parts of hardware and software.
Hardware components：The system device main control processing system controller adopts TI company digital signal controller
TMS320F2812, it has 120MHz high speed processing ability, possesses 32 bit processing units, and single command cycle 32 tires out
Plus computing, the requirement applied for faster code development and the processor performance of integrated high-order controller can be met.With 6
As a example pipe mother's monitoring point for displacement, system the general frame such as Fig. 3.Main inclusion（1）Main control, processing unit module,（2）Auxiliary
Help control, processing unit module,（3）Laser ranging module,（4）Temperature and humidity measurement module,（5）Industrial computer.Each module it
Between communication：（1）With（2）、 （1）With（3）、 （2）With（3）Between using RS485 communication, why using wired
RS485 communicates, and is because that high-voltage great-current pipe is female and can form large-scale high energy alternating electromagnetic field in its periphery, may be right
The radio communication device with antenna of radio frequency, bluetooth etc forms fatal harm.（1）With（5）Between adopt fiber optic communication, here
Why without RS485 communication.Wire communication meeting serious curtailment creep age distance, does not consider.Using fiber optic communication in this ring
Reliability service under border.
（1）Main control, processing unit module：In addition to three laser ranging modules of real-time control, by RS485 bus
Connect each assist control, processing unit module, make pipe mother's monitoring point for displacement extend to 100, and the mother's displacement of each pipe
Amount, humiture are sent to master control interior industrial computer machine reception ranging data by optical fiber and are analyzed.
（2）Assist control, processing unit module：Control the mother's monitoring point for displacement laser ranging of A, B, C three-phase pipe in time
Module, processes related data and the situation of change of displacement is sent to main control, processing unit module in real time.
（3）Laser ranging module：Pipe mother's displacement is carried out with real time record and data is sent to control unit.Swash
Ligh-ranging module is mainly controlled by laser controller.
Laser control system collectivity Scheme Design：Due to semiconductor laser light radiation wavelength and output and driving
Electric current, P-N junction temperature has very big relation, and electric current, the fluctuating of temperature can cause the change of luminous power, or cause laser frequency
Drift, impact output accurate, stable.In addition to bulk of optical feedback method, temperature, the feedback regulation of operating current are to control partly to lead
A kind of effective means of volumetric laser output characteristics.The system, during test adjustment, resolves into two independent modules, that is,
Current control and temperature control, carry out system integration and test again after each modular debugging success.
Current control module.Driving power supply energising after, system automatically resets, by software can setting electric current value, DSP will
This digital quantity is added to the input of DA transducer, is converted into after analog quantity through digital-to-analogue conversion, is loaded into final stage constant-current source electricity
Lu Shang, thus electric current output needed for obtaining.Meanwhile, final stage current signal is converted into voltage signal, DSP by sample resistance
To this voltage signal sampling, feed back to DSP after the conversion of A/D transducer, send into PID controller after calculating in real time, by PID
Controlled quentity controlled variable sent by controller is voltage 0 U, when the measured value of final stage current signal is less than set-point, increases electric current, now end
Step voltage rises；Conversely, reduction electric current, controlled with the steady realizing final stage electric current.
Temperature control modules.Using the P-N temperature sampling to laser diode for the temperature sensor AD 590, by temperature
Change into electric current, thus sampling to electric current by DSP, after algorithm process, output PWM square wave controls quasiconductor system
Cooler drive circuit works, make system always work near 25 °C by cooling piece and heat abstractor.
AD590 is two end temperature sensors having corrected that, DC supply is 4 ~ 30V.Thin film on chip
Resistance has already been through laser correction, therefore device interchangeability is good.Output impedance is up to more than 100 M Ω, can disappear well
Impact to system of fluctuation and AC ripple except voltage.Forward voltage up to 44V, reversely pressure up to 20V, therefore, that is,
Make running voltage reversed, be not easy to damage device, general work voltage is+15V.The temperature scale that AD590 is given is thermodynamics temperature
Mark T, if represented with Celsius temperature t, the relation of t and T is t=T-273.16.AD590 has standardization（1μ A
/ K ）Output, intrinsic linearisation relation it is not necessary to electric bridge, therefore AD590 output electric current be easy to long-distance transmissions,
And will not produce, because of the reduction of driving voltage and noise voltage, the error not allowed.
（4）Temperature and humidity measurement module：The humiture of real-time monitoring environment, passes through fiber-optic communications traffic temperature-humidity signal
To control, processing unit.Ambient temperature and humidity measurement adopts Temperature Humidity Sensor SHTll.SHTll is to have two-wire serial interface
The accurate digital new relative humidity of monolithic whole school and temperature sensor, can be used to the ginseng such as Relative Humidity Measuring, temperature and dew point
Number, the features such as having digital output, exempt from debugging, non-calibrating, exempt from peripheral circuit and entirely exchange.With traditional Temperature Humidity Sensor
Difference, SHTll is the novel intelligent Temperature Humidity Sensor based on CMOSens technology, and Temperature Humidity Sensor, signal are put by it
Big conditioning, A/D conversion, two-wire serial interface are all integrated in a chip, have merged CMOS chip technology and biography
Sensor technology, makes sensor have the advantages that quality brilliance, super fast response, strong antijamming capability, high cost performance.It is surveyed
Amount principle：Produce the signal of relative humidity, temperature first with 2 sensors respectively；It is then passed through amplifying, send respectively
Carry out analog digital conversion, calibration and error correction to A/D transducer；Pass through two-wire serial interface again by relative humidity and temperature
Data deliver to micro controller；Finally complete nonlinear compensation and temperature-compensating using micro controller.
（5）Industrial computer module.Receive and the data come is transmitted by main control unit, and preserve data, set up document；Analysis
Data, resultant curve figure simultaneously shows；When pipe mother's displacement exceedes safety value, produce alarm signal.
The laser drive circuit of the system and controlling power circuit are in addition to the protective measure that chip has in itself, also right
System has carried out special protection, specific as follows.Overcurrent protection adopts current transformer as current measuring element, and it has
Sufficiently fast response speed, can be switched off within the excessively stream time that MOSFET pipe allows, play a protective role.As
Shown in Fig. 4, overcurrent protection signal takes from power resistor, adds to the in-phase input end of voltage comparator after partial pressure, filtering,
As shown in the figure.When in-phase input end over-current detection signal is higher than inverting input datum, comparator exports high level,
Make D2 be changed into forward conduction from original reverse-bias state, and homophase terminal potential is promoted to high level, make voltage ratio
Stably export high level compared with device always.Meanwhile, this overcurrent signal also delivers to the foot I/O mouth of TMS320F2812.
Claims (1)
1. a kind of method for monitoring cross-over pipe mother's displacement is it is characterised in that include：By laser infrared distance measuring sensor
To reflector iraser, the distance between measurement pipe female end head and laser head, then pass through calculating and just record pipe mother's level
The step of displacement；Calculate formula be：d=(vt-s)*cos(arcsinh/s)
Wherein v:Laser propagation speed t:The time v that laser is propagated in atmosphere is given data, and h represents luminous point
It is irradiated to the vertical dimension between the laser spots on reflecting plate to laser probe；S represents laser probe to reflecting plate
Distance；T is testing data；
Also include the temperature control step of a laser infrared distance measuring sensor：Using the P-N to laser diode for the temperature sensor
Temperature sampling, temperature inversion is become electric current, thus sampling to electric current by DSP, after algorithm process, exports PWM side
Ripple controls semiconductor refrigerator drive circuit work, makes system always work in 25 DEG C by cooling piece and heat abstractor；
Also include：（1）Main control, processing unit module are used for outside real-time control laser ranging module, by RS485 bus
Connect each assist control, processing unit module, and each pipe mother's displacement is sent to master control interior industrial computer by optical fiber
Machine receives the step that ranging data is analyzed；（2）Assist control processing unit module is used for timely control pipe mother's displacement prison
Measuring point laser ranging module, processes related data and the situation of change of displacement is sent to main control-processing unit module in real time
Step；（3）Laser ranging module：Pipe mother's displacement is carried out with real time record the step that data is sent to control unit
；（4）Temperature and humidity measurement module is used for the humiture of a real-time monitoring environment, and temperature-humidity signal is passed through fiber-optic communications traffic extremely
Control, the step of processing unit；Industrial computer is used for reception and transmits, by main control unit, the data come, and preserves data, sets up
Document；Analytical data, resultant curve figure simultaneously shows；When pipe mother's displacement exceedes safety value, produce the step of alarm signal
Suddenly；Wherein said main control-processing unit module and described assist control processing unit module, described main control, institute
The processing unit module stated and described laser ranging module, described assist control processing unit module and laser ranging module
Between using RS485 communication, adopt light between described main control-processing unit module and described temperature and humidity measurement module
Fiber communication.
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| CN201410132927.0A CN104075661B (en) | 2014-04-03 | 2014-04-03 | Method for monitoring overhead tube bus displacement |
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| CN201410132927.0A CN104075661B (en) | 2014-04-03 | 2014-04-03 | Method for monitoring overhead tube bus displacement |
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| CN104075661B true CN104075661B (en) | 2017-02-15 |
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| CN105841621B (en) * | 2016-03-24 | 2018-05-04 | 中国科学院半导体研究所 | A kind of method of long-range measurement roadbed horizontal displacement |
| CN111486792B (en) * | 2020-03-19 | 2022-04-12 | 岭东核电有限公司 | Nuclear power station pipeline thermal displacement measuring method, device, equipment and medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201945897U (en) * | 2011-01-12 | 2011-08-24 | 博奥赛斯（天津）生物科技有限公司 | Device for controlling temperatures |
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| JP3339719B2 (en) * | 1993-03-04 | 2002-10-28 | 日立電子エンジニアリング株式会社 | Trolley wire height measuring device |
| CN101219671A (en) * | 2008-01-04 | 2008-07-16 | 李�诚 | Transverse and vertical dynamic displacement measuring device of high-speed railway track circuit |
| CN102003935B (en) * | 2010-11-03 | 2012-10-31 | 中国科学院光电技术研究所 | Environment compensation method for measurement employing laser tracker |
| CN103090908A (en) * | 2011-11-05 | 2013-05-08 | 国家电网公司 | Converting station tubular busbar on-line monitoring system |
| CN103245269A (en) * | 2013-05-17 | 2013-08-14 | 国家电网公司 | Gas insulated switchgear busbar barrel displacement detecting device |
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| CN201945897U (en) * | 2011-01-12 | 2011-08-24 | 博奥赛斯（天津）生物科技有限公司 | Device for controlling temperatures |
Non-Patent Citations (1)
| Title |
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| 快轨路基下沉位移监测系统研究;张雅楠;《中国优秀硕士学位论文信息科技辑》;20080715(第7期);第I140-157页 * |
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Effective date of registration: 20151022 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: XIANNING POWER SUPPLY COMPANY OF STATE GRID HUBEI ELECTRIC POWER Co. Applicant after: HUBEI University OF SCIENCE AND TECHNOLOGY Applicant after: WUHAN HAOMAI ELECTRIC POWER AUTOMATION Co.,Ltd. Address before: 30 No. 437100 Xianning city in Hubei Province spring Gan River Avenue Applicant before: XIANNING POWER SUPPLY COMPANY OF STATE GRID HUBEI ELECTRIC POWER Co. Applicant before: HUBEI University OF SCIENCE AND TECHNOLOGY Applicant before: WUHAN HAOMAI ELECTRIC POWER AUTOMATION Co.,Ltd. |
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