CN103324127B - Electric multiple unit flashover prevention device - Google Patents
Electric multiple unit flashover prevention device Download PDFInfo
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- CN103324127B CN103324127B CN201310276894.2A CN201310276894A CN103324127B CN 103324127 B CN103324127 B CN 103324127B CN 201310276894 A CN201310276894 A CN 201310276894A CN 103324127 B CN103324127 B CN 103324127B
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Abstract
Electric multiple unit flashover prevention device of the present invention; relate to the protective device of arc resistant electric discharge; that a kind of sensor technology and Single-chip Controlling of utilizing realizes preventing motor train unit train from high-speed cruising process, occurring the device of pollution flashover phenomenon; be installed in the power transformation interval of the motor-car traction substation that haze weather often occurs, connect and compose successively primarily of detecting portion, control section and alarm portion.Wherein detecting portion is biology sensor, it combines three parts by porous gas permeable membrane, using immobilized nitrifying bacteria and oxygen electrode and is formed by connecting in turn, gas to be measured is entered by porous gas permeable membrane, the detection having coordinated gas nitrite to be measured is combined by using immobilized nitrifying bacteria and oxygen electrode, overcome passive pollution flashover phenomenon is protected of antifouling work device of prior art, can not the shortcoming of positive prediction, and low and need the frequent shortcoming checked in the antifouling work reliability of the coatings of roof high-tension apparatus external coating antifouling work.
Description
Technical field
Technical scheme of the present invention relates to the protective device of arc resistant electric discharge, specifically electric multiple unit flashover prevention device.
Background technology
Haze weather can cause the motor train unit train roof high voltage component flashover of high-speed motion and damage high voltage component.The a large amount of suspended particulate substances contained in haze are attached on high-pressure system insulator, and just likely can form conductive layer on insulating material surface, high-tension electricity will puncture insulator arrangement ground connection, causes pollution flashover.Pollution flashover phenomenon is exactly under overcast and rainy haze weather, and air insulation reduces, and the high-tension electricity on contact net on the high-tension apparatus of motor train unit, causes equipment failure through air breakdown.It not only can cause equipment surface by Corrosion Under Electrical Current, also likely can cause train deceleration or stoppage in transit, have a strong impact on train operation.At present, the antifouling work device for the protection of electric utility mainly solves pollution flashover that rapid contamination accumulation produces and anti-rain dodges and mist sudden strain of a muscle problem, and CN201191544 discloses a kind of pollution flashover preventing insulator device; CN101527194 discloses a kind of the antifouling work method and the pollution flashover preventing insulator device that are applicable to rapid contamination accumulation; CN201527861U discloses a kind of anti-pollution flashover device of porcelain insulator, but such device is passive protection, cannot accurately and timely record pollutants in air concentration and feed back.The method preventing pollution flashover phenomenon from occurring adopted in addition is the coatings at roof high-tension apparatus external coating antifouling work, such as CN101649155 discloses a kind of self-cleaning ice-over resistant phase-change coating being applicable to multiple coating on surface of article, be particularly useful for power supply, railway electrification insulator dirt-proof of powering is ice-covering-proof, the security of raising system and service efficiency, but need the frequent integrality checking coating in the method for high-tension apparatus external coating coatings, and how international and domestic research improves making little progress of insulating material anti-fouling flashover performance further; Another thinking is that the data provided according to meteorological department along the line carry out decision-making, but the detection site of meteorological department is a lot of not near high ferro circuit, cannot accurately and timely record pollutants in air concentration and feed back to control center, the correctness promptness of decision-making is exerted a certain influence.Thus, propose a kind ofly can automatically to detect, Based Intelligent Control and the higher electric multiple unit flashover prevention device of reliability is very necessary.
Summary of the invention
Technical matters to be solved by this invention is: provide electric multiple unit flashover prevention device, overcome passive pollution flashover phenomenon is protected of antifouling work device of prior art, can not the shortcoming of positive prediction, and low and need the frequent shortcoming checked in the antifouling work reliability of the coatings of roof high-tension apparatus external coating antifouling work.
The present invention solves this technical problem adopted technical scheme: electric multiple unit flashover prevention device, that a kind of sensor technology and Single-chip Controlling of utilizing realizes preventing motor train unit train from high-speed cruising process, occurring the device of pollution flashover phenomenon, be installed in the power transformation interval of the motor-car traction substation that haze weather often occurs, primarily of detecting portion, control section and alarm portion connect and compose successively, and powered by a power module i.e. stabilized voltage supply exporting 5V DC voltage, wherein detecting portion is biology sensor, control section comprises single-chip microcomputer and peripheral circuit thereof, alarm portion is buzzer alarm circuit, the signal output part of biology sensor is wired to the P1.1 pin of singlechip chip, the P1.0 pin of singlechip chip is wired to buzzer alarm circuit, stabilized voltage supply gives detecting portion simultaneously, control section and alarm portion provide 5V DC voltage.
Above-mentioned electric multiple unit flashover prevention device, described biology sensor combines three parts by porous gas permeable membrane, using immobilized nitrifying bacteria and oxygen electrode and is formed by connecting in turn, gas to be measured is entered by porous gas permeable membrane, combines by using immobilized nitrifying bacteria and oxygen electrode the detection having coordinated gas nitrite to be measured.
Above-mentioned electric multiple unit flashover prevention device, the nitrite concentration lowest detection of described biology sensor is limited to 0.01mmol/L, and indirectly learns the content of oxynitrides in air by the content of the nitrite detected.
Above-mentioned electric multiple unit flashover prevention device, described single-chip microcomputer adopts AT89C51 chip, and its peripheral circuit comprises crystal oscillator and the reset circuit of single-chip microcomputer work indispensability.
Above-mentioned electric multiple unit flashover prevention device, described buzzer alarm circuit primarily of phase inverter, resistance value be the resistance of 1K, triode and hummer form, phase inverter contact resistance value is one end of the resistance of 1K, the base stage of another termination triode of this resistance, the grounded emitter of this triode, collector connects the negative pole of hummer, and one end of the positive polarity of this hummer connects 5V power supply.
Above-mentioned electric multiple unit flashover prevention device, does is the program circuit of described single-chip microcomputer: beginning → program initialization → haze content exceeds standard?
continue to detect;
warning → terminate program.
Above-mentioned electric multiple unit flashover prevention device, wherein involved parts, components and parts are all by commercially available, and it is installed and method of attachment is all known by those skilled in the art.
The invention has the beneficial effects as follows:
The outstanding substantive distinguishing features of electric multiple unit flashover prevention device of the present invention is:
(1) biology sensor in electric multiple unit flashover prevention device of the present invention is a kind of device that can detect the sulfide and amount of nitrides causing haze, the ultimate principle of its work is: test substance, namely the sulfide in haze and nitride, detect by the molecular recognition receptor in this biology sensor, to specific reaction be there is in the biosensor of molecular recognition receptor, the specific reaction occurred by biosensor again and signal are via physical component---transducer, change light into, electricity, the signal that sound etc. easily detect, thus indirectly know determinand for information about, this biology sensor is combined by porous gas permeable membrane, using immobilized nitrifying bacteria and oxygen electrode, nitrobacteria is wherein using nitrite as unique energy, its respiratory activity increases with the existence of nitrite, the dissolved oxygen concentration reducing amount that respiratory causes can be detected by oxygen electrode, thus indirectly reflects that the content of nitrite reflects the content of oxynitrides in air with this.
(2) single-chip microcomputer in electric multiple unit flashover prevention device of the present invention adopts AT89C51 chip, and the P1.1 pin of this chip receives the electric signal that biology sensor detects, the P1.0 pin of this chip controls the sounding of hummer; The peripheral circuit of single-chip microcomputer comprises crystal oscillator and the reset circuit of single-chip microcomputer work indispensability, ensure that the normal work of single-chip microcomputer.Wherein, the air pollutant concentration monitored when alarm criteria value is once breakdown in the process run by motor train unit train determined.Single-chip microcomputer receives the signal of biology sensor transmission and carries out analysis and Control, when biology sensor monitor haze content be above standard value time, single-chip microcomputer receive haze content be above standard value signal and the hummer controlling warning circuit sends alerting signal; If biology sensor detects that haze content is in standard value range, the hummer of Single-chip Controlling warning circuit does not send out alerting signal.The principle whether hummer sends alerting signal is: one end of the positive polarity of hummer is connected to above 5V power supply, the other end is connected to the collector of triode, the base stage of triode is controlled by a Sheffer stroke gate resistance in series R2 by the P0.1 pin of single-chip microcomputer, when P1.0 pin is low, Sheffer stroke gate exports high level, triode ON, the electric current of such hummer forms loop, sounds; When P1.0 pin is high, Sheffer stroke gate output low level, triode ends, and hummer is not sounded, and resistance R2 ensure that the base voltage of triode is in effective range.User can be made hummer sound by the level height of the P1.0 pin of programmed control single-chip microcomputer or be closed; The sound size of hummer and tone can be controlled by the high level time of P1.0 pin and the waveform of output adjusting single-chip microcomputer.
The significant progress of electric multiple unit flashover prevention device of the present invention is:
(1) biology sensor selectivity used in electric multiple unit flashover prevention device of the present invention is good, and antijamming capability is strong.
(2) electric multiple unit flashover prevention device functional reliability of the present invention is high, can the effective real-time air quality of perception avoid the generation of pollution flashover accident by changing the working voltage of motor train unit train;
(3) electric multiple unit flashover prevention device of the present invention can the pollutant levels of perception train running interval at any time, although motor-car speed per hour in the interval that pollutant levels are high reduces, but the time delayed can recover in the second best in quality interval of the remaining air of this range of driving, cause the late time of motor train unit train to control in minutes thus, and be unlikely to cause withdrawal of train or the late a few hours caused by system-wide section reduction of speed;
(4) electric multiple unit flashover prevention device of the present invention more existing painting insulating material technology, overcome passive pollution flashover phenomenon is protected of antifouling work device of prior art, can not the shortcoming of positive prediction, and low in the antifouling work reliability of the coatings of roof high-tension apparatus external coating antifouling work, need frequent can air-polluting shortcoming when checking and use.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the formation schematic block diagram of electric multiple unit flashover prevention device of the present invention.
Fig. 2 is the detecting portion principle of work schematic diagram of electric multiple unit flashover prevention device of the present invention.
Fig. 3 is the formation schematic diagram of the control section of electric multiple unit flashover prevention device of the present invention.
Fig. 4 is that the buzzer alarm circuit of electric multiple unit flashover prevention device of the present invention forms schematic diagram.
Fig. 5 is that the stabilized voltage supply of the 5V DC voltage of electric multiple unit flashover prevention device of the present invention forms schematic diagram.
Fig. 6 is the Single Chip Microcomputer (SCM) program process flow diagram of electric multiple unit flashover prevention device of the present invention.
Embodiment
Embodiment illustrated in fig. 1ly show, electric multiple unit flashover prevention device of the present invention is connected to form successively by detecting portion, control section and alarm portion, and is powered to various piece by a power module i.e. stabilized voltage supply exporting 5V DC voltage respectively.
Embodiment illustrated in fig. 2ly to show, the principle of work of the detecting portion of its work of electric multiple unit flashover prevention device of the present invention is: test substance, namely the sulfide in haze and nitride, detect by the molecular recognition receptor in this biology sensor, to specific reaction be there is in the biosensor of molecular recognition receptor, consequent signal changes light into via this physical component of signal conversion transducer, these signals easily detected of electricity harmony, these light, electricity and acoustical signal are detected by the signal detector in biology sensor, thus indirectly know determinand for information about.
Embodiment illustrated in fig. 3ly to show, the formation of the control section of electric multiple unit flashover prevention device of the present invention is: control section mainly comprises single-chip microcomputer and peripheral circuit thereof, described single-chip microcomputer adopts AT89C51 chip, the P1.1 pin of this chip receives the electric signal that biology sensor detects, the P1.0 pin of this chip controls the sounding of hummer, peripheral circuit comprises crystal oscillator and the reset circuit of single-chip microcomputer work indispensability, wherein C1 and C2 parallel connection access 5V power supply, C2 is an electrochemical capacitor, its negative pole series connection reset switch S, the other end of reset switch S with C1 is connected and accesses single-chip microcomputer RST pin afterwards and resistance in series R1, form reset circuit thus, electric capacity C3 and C4 is in parallel with crystal oscillator U after connecting accesses single-chip microcomputer XTAL1 and XTAL2 pin, and wants reliable ground between C3 and C4, for ensureing that single-chip microcomputer normally works, the EA pin ground connection of this chip.The electric capacity of the electric capacity of C1 to be the electric capacity of 22 μ F, C2 be 10 μ F, C3 is the electric capacity of 30pF, C4 is 30pF.
Single-chip microcomputer receives the signal of biology sensor transmission and carries out analysis and Control, and specifically, when biology sensor monitoring haze content exceedes set standard value, single-chip microcomputer receives signal and controls warning circuit and reports to the police; If biology sensor detected value is in set standard value range, single-chip microcomputer does not send out alerting signal.
Embodiment illustrated in fig. 4ly to show, the buzzer alarm circuit of the alarm portion of electric multiple unit flashover prevention device of the present invention is formed: single-chip microcomputer P1.0 pin accesses the phase inverter A that a model is 74HC00, a phase inverter A resistance value of forward connecting is the resistance R2 of 1K, the base stage of another termination triode of resistance R2 Q, the grounded emitter of triode Q, triode Q collector connects the negative pole of hummer F, and positive pole one end of hummer F is connected to above 5V power supply.The principle of work of this buzzer alarm circuit is: when single-chip microcomputer P1.0 pin is low, and the Sheffer stroke gate of phase inverter exports high level, triode Q conducting, like this and the formation loop of hummer F, sounds; When single-chip microcomputer P1.0 pin is high, the Sheffer stroke gate output low level of phase inverter, triode Q ends, and hummer F does not sound, and resistance R2 ensure that the base voltage of triode Q is in effective range.User can make hummer F sound or close by the level height of programmed control single-chip microcomputer P1.0 pin; The sound size of hummer F and tone can be controlled by the waveform of the high level time of adjustment single-chip microcomputer P1.0 pin and output.
Embodiment illustrated in fig. 5ly show, the voltage-stabilized power supply circuit of the 5V DC voltage of electric multiple unit flashover prevention device of the present invention forms and is: the electric capacity C7 comprising transformer civil power 220V being become 8V, the rectifier bridge of four IN5401 diode compositions, three terminal regulator W7805, diode IN5401, the electric capacity C5 of 220 μ F-25V, the electric capacity C6 of 1 μ F and 0.33 μ F.Civil power access 220/8V transformer, the alternating current of 8V is accessed the two ends of the rectifier bridge be made up of four IN5401 diodes, the IN end of three terminal regulator W7805 is received after parallel filtering electric capacity C5 and C6 of rectifier bridge other two ends, the GND end of three terminal regulator W7805 and other devices are altogether, the OUT end of three terminal regulator W7805 exports 5V direct current, shunt capacitance C7 exports stable 5V direct current for modules after eliminating the high frequency noise in output voltage, and hold anti-parallel diodes IN5401 to play the effect protecting three terminal regulator at the IN end of three terminal regulator W7805 and OUT.
Embodiment illustrated in fig. 6ly showing, does is the Single Chip Microcomputer (SCM) program flow process of electric multiple unit flashover prevention device of the present invention: beginning → program initialization → haze content exceeds standard?
continue to detect;
warning → terminate program.
Embodiment 1
According to the electric multiple unit flashover prevention device of above-mentioned Fig. 1, Fig. 3, Fig. 4, Fig. 5 and formation the present embodiment embodiment illustrated in fig. 6, wherein biology sensor used is combined by porous gas permeable membrane, using immobilized nitrifying bacteria and oxygen electrode.
In motor train unit operational process, single-chip microcomputer in electric multiple unit flashover prevention device receives the signal of biology sensor transmission and carries out analysis and Control, specifically, the nitrite concentration lowest detection of this biology sensor is limited to 0.01mmol/L, when nitrite concentration is lower than 0.59mmol/L, the electric current that biology sensor produces is directly proportional to the concentration of nitrite, namely the content of nitrite reflects the content of oxynitrides in air, statistics causes the relevant air data of train generation pollution flashover, analyzes the critical value of pollution flashover.The critical value of setting pollution flashover is 0.42mmol/L, if the content that biology sensor detects exceedes the critical value of set pollution flashover, namely the real-time air quality of effective perception is poor, single-chip microcomputer receives signal and controls warning circuit and reports to the police, and the working voltage at once by changing motor train unit train avoids the generation of pollution flashover accident; If give biology sensor detected value in the critical value range of set pollution flashover, single-chip microcomputer does not send out alerting signal, and motor train unit train will keep normal and run.
Claims (2)
1. an electric multiple unit flashover prevention device, it is characterized in that: this device utilizes sensor and single-chip microcomputer to realize preventing motor train unit train from high-speed cruising process, occurring pollution flashover phenomenon, by the real-time air quality of perception and the working voltage changing motor train unit train avoids the generation of pollution flashover accident, this device is installed in the power transformation interval of the motor-car traction substation that haze weather often occurs, by detecting portion, control section and alarm portion connect and compose successively, and powered by a power module i.e. stabilized voltage supply exporting 5V DC voltage, wherein detecting portion is biology sensor, control section comprises AT89C51 single-chip microcomputer and peripheral circuit thereof, alarm portion is buzzer alarm circuit, the signal output part of biology sensor is wired to the P1.1 pin of AT89C51 single-chip microcomputer, the P1.0 pin of AT89C51 single-chip microcomputer is wired to buzzer alarm circuit, stabilized voltage supply gives detecting portion simultaneously, control section and alarm portion provide 5V DC voltage,
The course of work of the control section of this device is: AT89C51 single-chip microcomputer receives the signal of biology sensor transmission and carries out analysis and Control, if the haze content that biology sensor detects exceedes set pollution flashover critical value, then AT89C51 single-chip microcomputer receives signal and the hummer controlling warning circuit sends alerting signal, and the working voltage at once by changing motor train unit train avoids the generation of pollution flashover accident; If biology sensor detects that haze content is in set pollution flashover critical value range, then the hummer of AT89C51 Single-chip Controlling warning circuit does not send out alerting signal, and motor train unit train will keep normal and run;
The biology sensor of this device is by porous gas permeable membrane, using immobilized nitrifying bacteria and oxygen electrode combine three parts and are formed by connecting in turn, gas to be measured is entered by porous gas permeable membrane, the detection having coordinated gas nitrite to be measured is combined by using immobilized nitrifying bacteria and oxygen electrode, nitrobacteria is wherein using nitrite as unique energy, its respiratory activity increases with the existence of nitrite, the dissolved oxygen concentration reducing amount that respiratory causes can be detected by oxygen electrode, thus indirectly reflect that the content of nitrite reflects the content of oxynitrides in air with this, the nitrite concentration lowest detection of this biology sensor is limited to 0.01mmol/L, when nitrite concentration is lower than 0.59mmol/L, the electric current that biology sensor produces is directly proportional to the concentration of nitrite, namely the content of nitrite reflects the content of oxynitrides in air, statistics causes the relevant air data of train generation pollution flashover, analyze the critical value of pollution flashover, the critical value of setting pollution flashover is 0.42mmol/L.
2. electric multiple unit flashover prevention device according to claim 1, described buzzer alarm circuit primarily of phase inverter, resistance value be the resistance of 1k Ω, triode and hummer form, phase inverter contact resistance value is one end of the resistance of 1k Ω, the base stage of another termination triode of this resistance, the grounded emitter of this triode, collector connects the negative pole of hummer, and one end of the positive polarity of this hummer connects 5V power supply.
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| CN108766686B (en) * | 2018-06-05 | 2020-09-15 | 瑞安复合材料(深圳)有限公司 | Low-surface-resistance flexible insulating material and preparation method thereof |
| CN108888965A (en) * | 2018-07-09 | 2018-11-27 | 王昆 | Cloud computing formula dynamic state of parameters acquisition platform |
| CN109297417B (en) * | 2018-08-30 | 2019-06-11 | 汕头市昊哲网络科技有限公司 | Intelligent track train height adjustment system |
| CN113353150B (en) * | 2021-06-29 | 2023-06-16 | 三一重机有限公司 | Chassis with limiting part fracture damage prevention function, method and operation machine |
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| JPH06292324A (en) * | 1993-04-05 | 1994-10-18 | San'eisha Mfg Co Ltd | Discharge clamp protective system |
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