CN102723787A - Track distribution type electromagnetic induction charging device and charging method for underground tunnel - Google Patents
Track distribution type electromagnetic induction charging device and charging method for underground tunnel Download PDFInfo
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- CN102723787A CN102723787A CN201210159968XA CN201210159968A CN102723787A CN 102723787 A CN102723787 A CN 102723787A CN 201210159968X A CN201210159968X A CN 201210159968XA CN 201210159968 A CN201210159968 A CN 201210159968A CN 102723787 A CN102723787 A CN 102723787A
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Abstract
The invention discloses a track distribution type electromagnetic induction charging device for an underground tunnel. The track distribution type electromagnetic induction charging device comprises a plurality of protection circuits, a plurality of primary inductors, a secondary inductor, a rectification filter circuit and a charging management circuit, wherein an input end of each protection circuit is the input end of an alternating current power supply; the primary inductors and the secondary inductor are connected in an electromagnetic induction mode; an output end of the charging management circuit is a charging output end; a plurality of primary inductors are fixedly connected with a track in the underground tunnel respectively and arranged in sequence; and the secondary inductor, the rectification filter circuit and the charging management circuit are arranged in a vehicle to be charged. The invention also discloses a charging method. The charging method comprises the following steps of: acquiring a charging start signal; starting charging; performing constant-current charging; starting performing constant-current charging when the voltage of a battery is more than 14.4 V; and finishing charging when charging current is less than 0.05 A. By the invention, non-contact high-efficiency charging is realized, and an explosion safety accident caused by contacting charging sparks in the tunnel is avoided.
Description
Technical field
The present invention relates to a kind of charging device and charging method that is used for subterranean tunnel, relate in particular to a kind of orbit distribution formula electromagnetic induction charged device and charging method that is used for subterranean tunnel.
Background technology
In a lot of subterranean tunnel occasions such as coal mine, sewer and electric power tunnel, press for the big moving range video monitoring equipment of some rail mounteds.But the power supply of mobile video monitor equipment has been supplied with into the obstacle that has restricted this series products entering practical stage.
In present existing this type rail mounted video monitoring equipment, power supply is supplied with and mainly contained following several kinds of schemes: (1) tail drags the service cable mode to supply power; (2) adopt the power supply of trolley and current-collector; (3) adopt the current transformer inductive power supply.Above-mentioned three kinds of supply power modes are when being used for subterranean tunnel; All existing separately can't be normally, the defective of safe operation: (1) drags the service cable mode to supply power for tail; Its major defect is: moving range is limited, and reason is that the railcar load increases with the track degree, along with load increases; Driving force, railcar weight and power consumption to track, service cable, railcar all can have bigger increase, finally cause growing the following practicality of distance and reduce significantly; (2) for trolley and current-collector supply power mode; Its major defect is: can not accomplish explosion-proof; There is great risk in the use of occasions such as mine, sewer and electric power tunnel; Reason is that these occasions fuel gas such as CO, CH4, H2S possibly occur at any time, and trolley may produce spark owing to loose contact with this non-reliable supply power mode that is connected of current-collector, cause blast; (3) for current transformer inductive power supply mode, its major defect is: power output is little, cost performance is low, reason be current this supply power mode more than primary side current is up to 50A in; The instrument transformer power output only has only 8W, and on the one hand, the underpower of 8W is with drive track video monitoring car; On the other hand, big electric current like this, accessory and construction cost also are very high; In addition; Current transformer inductive power supply mode in case primary side open circuit occurs or extra-high pressure can appear in secondary side, has the risk of the person and device security.
To sum up, existing rail mounted video monitoring equipment also can't normal in subterranean tunnel, safe handling, and this forms contradiction with the actual demand that presses for the big moving range video monitoring equipment of some rail mounteds.But the technical scheme that does not also address the above problem is at present reported the precedent that the technical scheme that does not more address the above problem is employed in patent and non-patent literature.
Summary of the invention
The object of the invention provides a kind of orbit distribution formula electromagnetic induction charged device and charging method that is used for subterranean tunnel with regard to being in order to address the above problem.
In order to achieve the above object, the present invention has adopted following technical scheme:
The orbit distribution formula electromagnetic induction charged device that is used for subterranean tunnel according to the invention; Comprise protective circuit, primary inductance, secondary inductance, current rectifying and wave filtering circuit and charge management circuit; The input of said protective circuit is an ac power input end; The output of said protective circuit is connected with the input of said primary inductance, is connected through electromagnetic induction between said primary inductance and the said secondary inductance, and the output of said secondary inductance is connected with the input of said current rectifying and wave filtering circuit; The output of said current rectifying and wave filtering circuit is connected with the input of said charge management circuit, and the output of said charge management circuit is the charging output; Said protective circuit and said primary inductance are a plurality of, a plurality of said primary inductances respectively with said subterranean tunnel in track be fixedly connected, a plurality of said primary inductances are arranged in order on the axial direction of said track; Said secondary inductance, said current rectifying and wave filtering circuit and said charge management circuit are installed on and are recharged on the car.
When being recharged car and need charging, be recharged car and move on the track position near primary inductance, the distance between this moment primary inductance and the secondary inductance is good more closely more; Primary inductance on the track converts alternating current into magnetic, and the secondary inductance that is recharged on the car converts magnetic into alternating current.Primary inductance and secondary inductance are formed a 220V50Hz linear transformer, realize contactless short-range electric energy transmitting.Secondary inductance becomes the alternating current that induction obtains into direct current through current rectifying and wave filtering circuit, under the control of charge management circuit, gives the battery charge that is recharged car again.Protective circuit is used to carry out the line short protection, is specially the recovered fuse that is connected in series in live wire.Adopt a plurality of protective circuits and primary inductance, can be therein protective circuit and/or primary inductance when ging wrong, adopt other protective circuit and primary inductance to charge, guarantee system's operate as normal.
Said orbit distribution formula electromagnetic induction charged device also comprises and is used to block ultrared locating stop piece, infrared emission tube and infrared receiver tube; Said locating stop piece is a plurality of; A plurality of said locating stop pieces are fixedly connected with said track respectively, and a plurality of said locating stop pieces are arranged in order on the axial direction of said track; Said infrared emission tube and said infrared receiver tube are installed on said being recharged on the car.
Particularly; Said charge management circuit comprises microcontroller, voltage sample modulate circuit, current sample modulate circuit, drive circuit and reduction voltage circuit; The input of the input of said voltage sample modulate circuit and said current sample modulate circuit is connected with the power output end that is recharged the pond respectively; The output of the output of said voltage sample modulate circuit and said current sample modulate circuit is connected with the battery signal input of said microcontroller respectively; The control output end of said microcontroller is connected with the input of said drive circuit; The output of said drive circuit is connected with the control input end of said reduction voltage circuit, and the power input of said reduction voltage circuit is connected with the output of said current rectifying and wave filtering circuit, and the power output end of said reduction voltage circuit is connected with the said power input that is recharged the pond.Reduction voltage circuit receives the control of microcontroller and plays switch and the effect that low-voltage regulated power supply is provided.
More specifically; Said reduction voltage circuit comprises switching circuit and afterflow filter circuit; The control input end of said switching circuit is connected with the output of said drive circuit; The power input of said switching circuit is connected with the output of said current rectifying and wave filtering circuit, and the power output end of said switching circuit is connected with the input of said afterflow filter circuit, and the output of said afterflow filter circuit is connected with the said power input that is recharged the pond.
During work, the DC power supply of current rectifying and wave filtering circuit output carries out step-down through the reduction voltage circuit of being made up of switching circuit, afterflow filter circuit, outputs to be recharged the both sides, pond and to charge the battery; The voltage sample modulate circuit is gathered cell voltage, feed back to microcontroller after the filtering, amplification then; In like manner; The current sample modulate circuit feeds back to microcontroller after with battery current sampling, amplification, filtering; Microcontroller converts aanalogvoltage to digital value through 10 built-in ADC analog to digital converters, passes through calculation process again, and the PWM that regulates output is the duty ratio of pulse-width signal; Realize regulating the reduction voltage circuit output voltage values, to satisfy voltage, the Current Control needs in the battery charging process.In this circuit, drive circuit is used to quicken the metal-oxide-semiconductor switching speed, and assurance PWM waveform rises, trailing edge is short as far as possible along the time, makes metal-oxide-semiconductor try not to be operated in linear zone, reduces the efficient that metal-oxide-semiconductor generates heat and improves circuit.
The charging method that orbit distribution formula electromagnetic induction charged device according to the invention adopts realizes through said charge management circuit, may further comprise the steps: (1) obtains the beginning charging signals; (2) begin charging; (3) constant current charge; (4) whether judge cell voltage greater than 14.4V, if, then get into step (5), if not, step (3) then returned; (5) constant voltage charge; (6) whether judge charging current less than 0.05A, if, then get into step (7), if not, step (5) then returned; (7) charging finishes.
As preferably; The method that obtains the beginning charging signals described in the said step (1) is: locating stop piece is fixedly connected with said track; Said being recharged infrared emission tube and infrared receiver tube are installed on the car; When the infrared ray between said infrared emission tube and the said infrared receiver tube was blocked by said locating stop piece, said charge management circuit obtained the beginning charging signals.
Beneficial effect of the present invention is:
The present invention realized contactless efficient charging, avoided contact charging spark in the tunnel to cause the security incident of exploding, and can realize normal, the safe handling of rail mounted video monitoring equipment in subterranean tunnel, is embodied as:
(1) charging device according to the invention can be used for length apart from the small rail car charging, has solved the problem of dragging the line supply power mode to be limited in scope;
(2) charging device according to the invention adopts the inductive power supply mode, can not satisfy requirement of explosion fully because of contact problems produce Mars, can under the fuel gas environment, work;
(3) power supply conversion efficiency of charging device according to the invention is high, and primary side need not pass through big electric current, and power-supply device and feed cable are required to reduce, and is with low cost;
(4) to use distributed primary inductance be the mode of induction charging point to charging device according to the invention, and can charge nearby at any time, can reduce battery capacity, reduces to be recharged the weight that car is railcar and track;
(5) charging device according to the invention adopts a plurality of primary inductances, has realized the redundancy backup of primary inductance, and the damage of indivedual primary inductances does not influence system's operate as normal;
(6) charging device according to the invention is with low cost, realizes simple: adopt distributed charge point, need not expensive device, materials such as strong current generator, high-current cable;
(7) charging device according to the invention can superhigh pressure not occur because of short circuit, open circuit etc. through adopting short-circuit protection and elementary split type transformer, brings equipment, personal safety hidden danger.
Description of drawings
Fig. 1 is the mechanical structure sketch map of orbit distribution formula electromagnetic induction charged device according to the invention;
Fig. 2 is the circuit block diagram of orbit distribution formula electromagnetic induction charged device according to the invention;
Fig. 3 is the electric power-feeding structure sketch map of orbit distribution formula electromagnetic induction charged device according to the invention;
Fig. 4 is the circuit structure block diagram of charge management circuit according to the invention;
Fig. 5 is the circuit diagram of charge management circuit according to the invention;
Fig. 6 is the flow chart of charging method according to the invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is made further specific descriptions:
As depicted in figs. 1 and 2; The orbit distribution formula electromagnetic induction charged device that is used for subterranean tunnel according to the invention; Comprise protective circuit, primary inductance 2, secondary inductance, current rectifying and wave filtering circuit, charge management circuit, locating stop piece 3, infrared emission tube (not shown) and infrared receiver tube (not shown), the input of protective circuit is an ac power input end, is connected with alternating current wires 1; The output of protective circuit is connected with the input of primary inductance 2; Be connected through electromagnetic induction between primary inductance 2 and the secondary inductance, the output of secondary inductance is connected with the input of current rectifying and wave filtering circuit, and the output of current rectifying and wave filtering circuit is connected with the input of charge management circuit; The output of charge management circuit is connected with the battery that is recharged car 5 for the charging output; Protective circuit and primary inductance 2 are a plurality of, are one-to-one relationship between protective circuit and the primary inductance 2, a plurality of primary inductances 2 respectively with subterranean tunnel in track 4 be fixedly connected, a plurality of primary inductances 2 are arranged in order on the axial direction of track 4; Secondary inductance, current rectifying and wave filtering circuit and charge management circuit are installed on and are recharged on the car 5; Locating stop piece 3 is used to block infrared ray, and locating stop piece 3 is a plurality of, and a plurality of locating stop pieces 3 are fixedly connected with track 4 respectively, and a plurality of locating stop pieces 3 are arranged in order on the axial direction of track 4; Said infrared emission tube and said infrared receiver tube are installed on and are recharged on the car 5.Current rectifying and wave filtering circuit adopts conventional full bridge rectifier and capacitor filter to get final product, and repeats no more at this.
As shown in Figure 3, protective circuit is used to carry out line short protection, is specially the recovered fuse F that is connected in series in live wire L, comprise F1, F2 ..., Fn.L11 among Fig. 3, L12 ..., L1n respectively with Fig. 1 in a plurality of primary inductances 2 corresponding, at one time, have only all the time a primary inductance 2 be L11, L12 ..., among the L1n one is close with secondary inductance L21, carries out the electromagnetic induction electric energy transmitting.
Like Fig. 1, Fig. 2 and shown in Figure 3, the split type transformer of charging device according to the invention is that the design procedure of primary inductance and secondary inductance is following:
1, confirms power output;
2, select the iron core of suitable primary and secondary coil;
3, calculate just, level coil turn, line footpath and every circle voltage;
4, calculate time, grade coil turn, line footpath and every circle voltage;
5, the distance between primary and secondary during railcar strict control of design time railcar stopping for charging.
As shown in Figure 4; Charge management circuit comprises microcontroller, voltage sample modulate circuit, current sample modulate circuit, drive circuit, switching circuit and afterflow filter circuit; The input of the input of voltage sample modulate circuit and current sample modulate circuit is that the power output end of small rail car battery is connected with being recharged the pond respectively; The output of the output of voltage sample modulate circuit and current sample modulate circuit is that two ADC ends are connected with the battery signal input of microcontroller respectively; The control output end of microcontroller is that the PWM end is connected with the input of PMOS drive circuit; The output of PMOS drive circuit is connected with switch mosfet circuit control input; The power input of switch mosfet circuit is connected with the output of current rectifying and wave filtering circuit, and the power output end of switch mosfet circuit is connected with the input of afterflow filter circuit, and the output of afterflow filter circuit is that the power input of small rail car battery is connected with being recharged the pond.
As shown in Figure 4; During work; The DC power supply of current rectifying and wave filtering circuit output is through being that the BUCK reduction voltage circuit that metal-oxide half field effect transistor circuit, afterflow filter circuit are formed is that the buck translation circuit carries out step-down by the switch mosfet circuit, and outputing to and being recharged the both sides, pond is the small rail car battery charge to being recharged the pond; Voltage sample modulate circuit microcontroller was gathered, fed back to after the filtering, amplification to the voltage signal of small rail car battery ADC is the input of digital to analog converter then; In like manner; The current sample modulate circuit feeds back to the ADC end of microcontroller after with the current signal sampling of small rail car battery, amplification, filtering; Microcontroller converts aanalogvoltage to digital value through 10 built-in ADC analog to digital converters, passes through calculation process again, regulates the PWM ripple duty ratio of output; Realize regulating the function of BUCK reduction voltage circuit output voltage values, to satisfy voltage, the Current Control needs in the small rail car battery charging process.In this circuit; The PMOS drive circuit is used for quickening the metal-oxide-semiconductor switching speed of switch mosfet circuit; Assurance PWM waveform rises, trailing edge is short as far as possible along the time, makes metal-oxide-semiconductor try not to be operated in linear zone, reduces the efficient that metal-oxide-semiconductor generates heat and improves circuit.
As shown in Figure 5, the concrete course of work of charge management circuit is following: wherein U1 is that microcontroller is a single chip microcontroller among Fig. 4, and U2 is that a correlation infrared ray photoelectricity is to pipe; When railcar during not in charge point, the infrared ray directive receiving tube that the U2 infrared emission tube sends, the conducting of U2 receiving tube; The INT0 pin of U1 is input as low level; When small rail car arrived charge point, the locating stop piece on the track blocked the infrared ray that U2 transmitting tube side is sent, and receiving tube ends; The INT0 pin of U1 is input as high level, can know the arrival charge point through the height variation of INT0 pin level.Q1, R1, R2, R3, Q2, Q3, Q4, D5, L22, C3, C4 form a BUCK reduction voltage circuit; U1 output pwm signal control BUCK reduction voltage circuit output voltage charges the battery; U1A constitutes a differential amplifier, and the voltage of small rail car battery is returned to U1, and R4 then is used for the electric current that acquisition stream is crossed the small rail car battery;, the amplifying circuit that U1B forms returns to U1 after amplifying; U1 carries out quantised samples through inner 10 ADC transducers to the current/voltage of small rail car battery, controls PWM output simultaneously again, realizes constant current, the constant voltage charge of battery.Small rail car battery B1 is 4 string ferric phosphate batteries; Monomer whose charging cut-ff voltage is 3.6V, and discharge cut-off voltage is 2V, and ferric phosphate lithium cell is with respect to common lithium ion battery and polymer Li-ion battery; Need not the extra balancing circuitry that adds in the use, directly string fills and gets final product.
Like Fig. 4 and shown in Figure 5, in the charge management circuit, the PMOS drive circuit is a key factor that influences circuit reliability, adopts the circuit actual measurement of Fig. 5, through selecting different R2 values, can realize that the lower edge is less than 100ns on the metal-oxide-semiconductor GATE end; Experimental data is following:
| R2 | The metal-oxide-semiconductor GATE rising edge time | The metal-oxide-semiconductor GATE trailing edge time |
| 2000 ohm | 843ns | ?921ns |
| 1000 ohm | 448ns | ?468ns |
| 510 ohm | 159ns | ?214ns |
| 270 ohm | 68ns | ?89ns |
So confirm that finally the resistance value of R2 is 270 ohm, consider that the dissipation power of resistance own is bigger under the bigger situation of PWM duty ratio, and keep bigger allowance that R2 selects the fixed carbon resister of 2W.
Charging method as shown in Figure 6, that orbit distribution formula electromagnetic induction charged device according to the invention adopts realizes through said charge management circuit, may further comprise the steps: (1) obtains the beginning charging signals; (2) begin charging; (3) constant current charge; (4) whether judge cell voltage greater than 14.4V, if, then get into step (5), if not, step (3) then returned; (5) constant voltage charge; (6) whether judge charging current less than 0.05A, if, then get into step (7), if not, step (5) then returned; (7) charging finishes.In conjunction with Fig. 1; The method that obtains the beginning charging signals described in the above-mentioned steps (1) is: locating stop piece 3 is fixedly connected with track 4; Be recharged installation infrared emission tube and infrared receiver tube on the car 5; When the infrared ray between infrared ray transmitting tube and the infrared receiver tube is positioned catch 3 when blocking, charge management circuit obtains the beginning charging signals.
In conjunction with Fig. 1-Fig. 6, when being recharged car 5 and needing charging, be recharged car 5 and move on the track 4 position near primary inductance 2, the distance between this moment primary inductance 2 and the secondary inductance is good more closely more; Primary inductance 2 on the track 4 converts alternating current into magnetic, and the secondary inductance that is recharged on the car 5 converts magnetic into alternating current.Primary inductance 2 is formed a 220V50Hz linear transformer with secondary inductance, realizes contactless short-range electric energy transmitting.Secondary inductance becomes the alternating current that induction obtains into direct current through current rectifying and wave filtering circuit, under the control of charge management circuit, gives the battery charge that is recharged car 5 again.
Claims (6)
1. orbit distribution formula electromagnetic induction charged device that is used for subterranean tunnel; It is characterized in that: comprise protective circuit, primary inductance, secondary inductance, current rectifying and wave filtering circuit and charge management circuit; The input of said protective circuit is an ac power input end; The output of said protective circuit is connected with the input of said primary inductance, is connected through electromagnetic induction between said primary inductance and the said secondary inductance, and the output of said secondary inductance is connected with the input of said current rectifying and wave filtering circuit; The output of said current rectifying and wave filtering circuit is connected with the input of said charge management circuit, and the output of said charge management circuit is the charging output; Said protective circuit and said primary inductance are a plurality of, a plurality of said primary inductances respectively with said subterranean tunnel in track be fixedly connected, a plurality of said primary inductances are arranged in order on the axial direction of said track; Said secondary inductance, said current rectifying and wave filtering circuit and said charge management circuit are installed on and are recharged on the car.
2. the orbit distribution formula electromagnetic induction charged device that is used for subterranean tunnel according to claim 1; It is characterized in that: said orbit distribution formula electromagnetic induction charged device also comprises and is used to block ultrared locating stop piece, infrared emission tube and infrared receiver tube; Said locating stop piece is a plurality of; A plurality of said locating stop pieces are fixedly connected with said track respectively, and a plurality of said locating stop pieces are arranged in order on the axial direction of said track; Said infrared emission tube and said infrared receiver tube are installed on said being recharged on the car.
3. the orbit distribution formula electromagnetic induction charged device that is used for subterranean tunnel according to claim 1; It is characterized in that: said charge management circuit comprises microcontroller, voltage sample modulate circuit, current sample modulate circuit, drive circuit and reduction voltage circuit; The input of the input of said voltage sample modulate circuit and said current sample modulate circuit is connected with the power output end that is recharged the pond respectively; The output of the output of said voltage sample modulate circuit and said current sample modulate circuit is connected with the battery signal input of said microcontroller respectively; The control output end of said microcontroller is connected with the input of said drive circuit; The output of said drive circuit is connected with the control input end of said reduction voltage circuit; The power input of said reduction voltage circuit is connected with the output of said current rectifying and wave filtering circuit, and the power output end of said reduction voltage circuit is connected with the said power input that is recharged the pond.
4. the orbit distribution formula electromagnetic induction charged device that is used for subterranean tunnel according to claim 3; It is characterized in that: said reduction voltage circuit comprises switching circuit and afterflow filter circuit; The control input end of said switching circuit is connected with the output of said drive circuit; The power input of said switching circuit is connected with the output of said current rectifying and wave filtering circuit; The power output end of said switching circuit is connected with the input of said afterflow filter circuit, and the output of said afterflow filter circuit is connected with the said power input that is recharged the pond.
5. the charging method that orbit distribution formula electromagnetic induction charged device as claimed in claim 1 adopts realizes through said charge management circuit, it is characterized in that: may further comprise the steps: (1) obtains the beginning charging signals; (2) begin charging; (3) constant current charge; (4) whether judge cell voltage greater than 14.4V, if, then get into step (5), if not, step (3) then returned; (5) constant voltage charge; (6) whether judge charging current less than 0.05A, if, then get into step (7), if not, step (5) then returned; (7) charging finishes.
6. charging method according to claim 5; It is characterized in that: the method that obtains the beginning charging signals described in the said step (1) is: locating stop piece is fixedly connected with said track; Said being recharged infrared emission tube and infrared receiver tube are installed on the car; When the infrared ray between said infrared emission tube and the said infrared receiver tube was blocked by said locating stop piece, said charge management circuit obtained the beginning charging signals.
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| CN201210159968.XA CN102723787B (en) | 2012-05-22 | 2012-05-22 | Track distribution type electromagnetic induction charging device and charging method for underground tunnel |
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| CN201210159968.XA CN102723787B (en) | 2012-05-22 | 2012-05-22 | Track distribution type electromagnetic induction charging device and charging method for underground tunnel |
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| CN103285540A (en) * | 2013-06-06 | 2013-09-11 | 成都慧拓自动控制技术有限公司 | Suspended type intelligent fire-fighting robot |
| CN106809036A (en) * | 2015-11-30 | 2017-06-09 | 中惠创智无线供电技术有限公司 | AGV dollies based on wireless power |
| CN110177253A (en) * | 2019-05-27 | 2019-08-27 | 广东电网有限责任公司 | A kind of movable video monitoring device and system for electric energy meter detection assembly line |
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| CN110177253A (en) * | 2019-05-27 | 2019-08-27 | 广东电网有限责任公司 | A kind of movable video monitoring device and system for electric energy meter detection assembly line |
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| CN102723787B (en) | 2014-11-26 |
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