CN201466987U

CN201466987U - Device for obtaining electric energy from power transmission cable

Info

Publication number: CN201466987U
Application number: CN2009201087454U
Authority: CN
Inventors: 李红云; 于钦刚; 陈志高
Original assignee: China Electric Power Research Institute Co Ltd CEPRI
Current assignee: China Electric Power Research Institute Co Ltd CEPRI
Priority date: 2009-06-09
Filing date: 2009-06-09
Publication date: 2010-05-12
Anticipated expiration: 2019-06-09

Abstract

The utility model relates to a device for obtaining electric energy from a power transmission cable. The device comprises a detecting device and a voltage conversion device, wherein the detecting device is used for detecting alternating electric magnetic fields on the periphery of the cable and obtaining alternating current voltage signals according to detected electric magnetic field intensity, and the voltage conversion device is used for converting the alternating current voltage signals obtained by the detecting device into direct current voltage signals and outputting the same. The device has the advantages that the device can continuously obtain alternating current from cables for power transmission according to an electromagnetic induction principle, and automatically supplies power for a cable monitor after voltage stabilizing treatment.

Description

Obtain the device of electric energy from the transmission of electricity cable

Technical field

The utility model relates to a kind of device that obtains electric energy, especially a kind of device that can obtain electric energy from the transmission of electricity cable.

Background technology

For the state of transmission of electricity cable operation is monitored, such as to the aerial high-voltage line at vibration, windage yaw, icing, wave, aspect such as sag monitoring or underground power transmission line cable monitored at aspects such as vibrations, humidities, all need monitoring instrument is directly installed on the cable of transmission current.But be subjected to environmental limit, these on-line monitoring instruments are difficult to obtain stable power.Though also have some electric supply installations such as the solar energy of employing, high-energy battery to give the power supply of on-line monitoring instrument in the prior art, in the face of the bigger occasion of energy requirement, these existing electric supply installations are difficult to provide the electric energy of long-term abundance.If can obtain some electric energy from these cables of transmitting electricity comes then will improve greatly the useful life of these instruments to the power supply of on-line monitoring instrument.So how to obtain enough electric energy from the transmission of electricity cable is the problem that those skilled in the art wish solution for a long time always.

The utility model content

In order to solve in the prior art problem of how obtaining enough electric energy from the transmission of electricity cable, the utility model embodiment provides a kind of device that can obtain electric energy from the transmission of electricity cable, this device can obtain alternating current from the cable of transferring electric power according to electromagnetic induction principle, just can obtain stable voltage again after voltage stabilizing is handled.

In order to realize the purpose of above-mentioned utility model, the utility model embodiment provides a kind of device that can obtain electric energy from the transmission of electricity cable, it comprises, checkout gear is used to detect the alternating electromagnetic field around the described cable and obtains ac voltage signal according to detected described electromagnetic field field intensity; Voltage conversion device is used for the ac voltage signal that described checkout gear obtains is converted to d. c. voltage signal, and exports described d. c. voltage signal.

As a kind of optimal way, checkout gear comprises package casing and is wound with the annular core of at least one group of wire coil, be provided with the annular closed cavity in the described package casing, form the test side that is used to detect the alternating electromagnetic field around the described cable thereby described iron core is arranged in the described cavity with described package casing, described test side inputs to described voltage conversion device with the metal wire of detected ac voltage signal by the wire coil two ends.Described checkout gear also comprises metal sleeve, described voltage conversion device is arranged in the described metal sleeve, entrance hole on the described metal sleeve is failed the line passage with corresponding the connecting to form of wire hole on the described package casing, so that described metal wire connects described voltage conversion device by defeated line passage.Described package casing mainly is made up of a pair of overcoat that is provided with identical semi-annular chambers, the overcoat of described two semi-annular chambers is oppositely arranged, and described two overcoats, one side flexibly connects, thereby the fixedly connected package casing with described annular closed cavity of forming of opposite side is so that described transmission of electricity cable passes described package casing center.

As a kind of optimal way, this can also comprise the automatic switchover electric supply installation from the device that the transmission of electricity cable obtains electric energy, be used for the d. c. voltage signal of described voltage conversion device conversion is converted to the battery charge that voltage regulation signal is given described automatic switchover electric supply installation, and select described battery automatically or export described voltage regulation signal to provide power supply to the monitoring instrument on the described transmission of electricity cable.

Comprise voltage stabilizing circuit, charge-discharge control circuit, storage battery, first diode and second diode as the described automatic switchover electric supply installation of a kind of optimal way of automatic switchover electric supply installation,

Described voltage stabilizing circuit is connected successively with described charge-discharge control circuit, described storage battery and the positive pole of first diode, form the first power supply branch road, be used for the d. c. voltage signal of input is carried out giving described charge in batteries after voltage stabilizing is handled, and give described monitoring instrument power supply by described first diode;

The positive pole of described second diode is connected with the output of described voltage stabilizing circuit, and the negative pole of described second diode is connected with described first diode cathode, forms the second power supply branch road with described voltage stabilizing circuit, is used for to described monitoring instrument power supply;

One of them big branch road of output voltage is given described monitoring instrument power supply in the described automatic switchover electric supply installation selection first power supply branch road and the second power supply branch road.

Based on above-mentioned two kinds of optimal ways, also be provided with at least one group of heat-sink unit in the described metal sleeve, have at least one group of wire coil one end to be connected in the described checkout gear with described voltage conversion device, the other end connects described voltage conversion device after being connected in series one group of heat-sink unit, form the first AC signal input group that is used for to described voltage conversion device output AC voltage signal;

Described voltage conversion device comprises voltage conversion circuit, voltage control circuit and input-switching circuit,

Described voltage conversion circuit is used for the ac voltage signal of input is converted to d. c. voltage signal and exports described d. c. voltage signal;

Described voltage control circuit is used for d. c. voltage signal when described output not in threshold range the time, transmits control signal;

Described input-switching circuit, be used for after receiving described control signal, set up being connected of the described first AC signal input group and described voltage control circuit, make and the described first AC signal input group instantaneous short-circuit suppress the rising of described alternating voltage with this.

Equally, based on above-mentioned two kinds of optimal ways, also be provided with at least one group of heat-sink unit in the described metal sleeve, described checkout gear comprises the first AC signal input group and the second AC signal input group, the described first AC signal input group and the second AC signal input group respectively comprise one group of wire coil, and the coil turn in the described first AC signal input group is greater than the number of turn of coil in the second AC signal input group;

Wire coil one end in the described first AC signal input group is connected with described voltage conversion device, the other end connects described voltage conversion device after being connected in series one group of heat-sink unit, wire coil two ends in the described second AC signal input group directly are connected with described voltage conversion device, are used for to described voltage conversion device output AC voltage signal;

Described input-switching circuit, be used for after receiving described control signal, set up being connected of the described first AC signal input group and described voltage control circuit, make the described first AC signal input group provide counter magnetic flux, suppress the rising of described alternating voltage with this to described iron core.

Based on above-mentioned second kind of optimal way, also be provided with two groups of heat-sink units in the described metal sleeve, described checkout gear comprises the first AC signal input group and the second AC signal input group, the described first AC signal input group and the second AC signal input group respectively comprise one group of wire coil, and the coil turn in the described first AC signal input group is greater than the number of turn of coil in the second AC signal input group;

Wire coil one end in the described first AC signal input group is connected with described voltage conversion device, the other end connects described voltage conversion device after being connected in series one group of heat-sink unit, wire coil one end in the described second AC signal input group is connected with described voltage conversion device, and another connects described voltage conversion device after organizing heat-sink unit to the other end by serial connection;

Heat-sink unit in the described first AC signal input group is provided with temperature sensor, is used for detecting the control module that temperature value on the described heat-sink unit sends to the monitoring instrument on the described transmission of electricity cable;

Described control module is used for sending first control signal when the temperature value that receives surpasses preset range; Be used for when the electric weight of the storage battery on the described automatic switchover electric supply installation is lower than predetermined value, then sending second control signal;

Described voltage conversion device comprises input-switching circuit, voltage conversion circuit and voltage control circuit,

Described input-switching circuit is used for selecting to connect the first AC signal input group or the second AC signal input group according to receiving described first control signal or second control signal, to set up being connected of described voltage conversion device and described checkout gear;

Described voltage conversion circuit is used for the ac voltage signal of input is converted to d. c. voltage signal and exports described automatic switchover electric supply installation to;

Described voltage control circuit, be used for working as the d. c. voltage signal of described output not in threshold range, the branch road that the conducting that transmits control signal links to each other with the described first or second AC signal input group, make and the described first or second AC signal input group instantaneous short-circuit and suppress the rising of described alternating voltage guarantee the direct voltage operate as normal of described automatic switchover electric supply installation according to output.

As a kind of optimal way, above-mentioned heat-sink unit is one or more high-power resistances, and described each resistance is fixed on the inwall of described metal sleeve, also is provided with cooling pad between described each resistance and the described metal sleeve inwall.

The beneficial effect of the utility model embodiment is: can obtain alternating current from the cable of transferring electric power according to electromagnetic induction principle always, after handling, voltage stabilizing obtains stable voltage again, thereby can provide burning voltage to monitoring instrument on the cable or inspection device for a long time, solve the problem that those skilled in the art wish solution for a long time always.

Description of drawings

Fig. 1 obtains the structured flowchart of the device of electric energy from the transmission of electricity cable for the utility model embodiment one.

Fig. 2 obtains another structured flowchart of the device of electric energy from the transmission of electricity cable for the utility model embodiment one.

Fig. 3 obtains the structured flowchart of the device of electric energy from the transmission of electricity cable for the utility model embodiment two.

Fig. 4 obtains the structural representation of checkout gear the device of electric energy for the utility model embodiment's two from the aerial high voltage power line cable.

Fig. 5 is the circuit diagram of the voltage conversion device of the utility model embodiment two.

Fig. 6 obtains the structured flowchart of the device of electric energy for the utility model embodiment's three from the aerial high voltage power line cable.

Fig. 7 obtains the structural representation of checkout gear the device of electric energy for the utility model embodiment's three from the aerial high voltage power line cable.

Fig. 8 obtains the circuit diagram of voltage conversion device the device of electric energy for the utility model embodiment's three from the aerial high voltage power line cable.

Fig. 9 obtains the structured flowchart of the device of electric energy for the utility model embodiment's four from the aerial high voltage power line cable.

Figure 10 obtains the structural representation of checkout gear the device of electric energy for the utility model embodiment's four from the aerial high voltage power line cable.

Figure 11 obtains the circuit diagram of voltage conversion device the device of electric energy for the utility model embodiment's four from the aerial high voltage power line cable.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

The utility model embodiment is for obtaining the device of electric energy from the aerial high voltage power line cable, this device obtains alternating current according to electromagnetic principle always from high voltage cable, after voltage stabilizing is handled, can give battery charging and discharging or directly power supply as required again, thereby can burning voltage is provided for for a long time aerial high-voltage cable monitoring instrument.

Embodiment one, and as shown in Figure 1, Fig. 1 obtains the structured flowchart of the device of electric energy from the transmission of electricity cable for the aerial high-voltage of present embodiment.Described device comprises checkout gear 101 and voltage conversion device 102, the test side of checkout gear 101 is connected with described high voltage cable, detect the alternating electromagnetic field around the described cable and obtain ac voltage signal according to detected described electromagnetic field field intensity, the output of checkout gear 101 is exported described ac voltage signal; The input of described voltage conversion device 102 is connected with the output of described checkout gear 101, be used for will input ac voltage signal be converted to galvanic current after by rectification, filtering and press signal, and export described d. c. voltage signal by the output of described voltage conversion device 102.

For example described checkout gear 101 can be a kind of annular core that is wound with at least one group of wire coil that comprises, thereby this annular core is enclosed within on the high voltage cable induction field when the high voltage cable transferring electric power by the annular outer cover that can disconnect, and the alternating voltage that obtains by wire coil output is to described voltage conversion device 102.The described annular outer cover material that preferably the magnetic field shielding coefficient is little is made, and can not cause unnecessary restriction to induction field like this.And described voltage conversion device 102 can be a kind of current rectifying and wave filtering circuit, the input of described current rectifying and wave filtering circuit links to each other with described checkout gear output, for example the metal wire with above-mentioned wire coil two ends is connected, by current rectifying and wave filtering circuit the ac voltage signal of importing is converted to d. c. voltage signal then, and exports described d. c. voltage signal.

The output of voltage conversion device 102 can link to each other with the monitoring instrument on the cable, is used for direct voltage is transferred to described instrument, thereby necessary electric energy is provided for described instrument.But in order better to give described instrument power supply, can also connect a described automatic switchover electric supply installation 103 in voltage conversion device 102 backs, as shown in Figure 2, Fig. 2 is another structured flowchart of present embodiment, the input of described automatic switchover electric supply installation 103 is connected with the output of described voltage conversion device 102, the described d. c. voltage signal that is used for importing is converted to voltage regulation signal and charges the battery, and selection still is that described voltage regulation signal provides power supply for described monitoring instrument by described battery discharge automatically.

Present embodiment compared with prior art advantage is: the ac magnetic field on can not only testing stand outage line ball cable also obtains alternating voltage, again described alternating voltage is converted to direct voltage output, and can selectively power by connecting an automatic switchover electric supply installation 103 to the monitoring instrument on the high voltage cable, the useful life and the stability of electric supply installation have been improved greatly, even in the face of the bigger occasion of energy requirement, this self-power supply device also can provide the electric energy of long-term abundance, thereby has guaranteed the work of monitoring instrument long-term stability on the high voltage cable.

The selection that need to prove each unit reality in the foregoing description is not unique, and can select suitable unit combination to become the technical solution of the utility model according to actual conditions.Can be such as voltage conversion device 102 without the current rectifying and wave filtering circuit in the present embodiment, and use other to well known to a person skilled in the art some conversion plans, but this scheme should be all in the application's protection range.

Embodiment two, as shown in Figure 3, Fig. 3 obtains the structured flowchart of the device of electric energy for present embodiment from the aerial high voltage power line cable. and checkout gear 201 comprises annular core 211 and the heat-sink unit 212 that is wound with one group of wire coil, this annular core 211 is arranged in the package casing of annular closed cavity, annular core is easier to be arranged in the described package casing in order to make, described package casing mainly is made up of a pair of overcoat that is provided with identical semi-annular chambers, the overcoat of described two semi-annular chambers is oppositely arranged, and described two overcoats, one side flexibly connects, thereby the fixedly connected package casing of forming of opposite side with described annular closed cavity, and described annular core also is made up of two identical semi-circular iron cores, after the fixation side of described package casing being untied and opening described one semi-circular iron core that is wound with one group of wire coil is put into one of them semi-circular overcoat by active side, the semi-circular iron core that again another is not twined wire coil is put into another semi-circular overcoat, at last fixation side is fixed and make two semi-circular iron core group synthesize a complete annular core that is wound with one group of wire coil 211, this moment, package casing also was a circulus, so described transmission of electricity cable passes described package casing center, so but described like this annular core 211 and package casing are just formed the test side that is used to detect described aerial high-voltage cable alternating electromagnetic field on every side. described test side is with regard to induction field when the high voltage cable transferring electric power.

Wire coil one end on the described annular core 211 is connected with voltage conversion device 202, the other end is connected with described voltage conversion device 202 by described heat-sink unit 212, thereby forms AC signal input group (shown in frame of broken lines among Fig. 3) with described heat-sink unit 212.The alternating voltage of Chan Shenging just inputs in the described voltage conversion device 202 by described AC signal input group like this.Wherein said heat-sink unit 212 is one or more high-power resistances that connect successively by described wire coil one end, on the metal shell inwall of described resistance is fixed on present embodiment the described device that obtains electric energy, and for the slit between the abundant described resistance of heat radiation and the described metal shell inwall also by the cooling pad filling is set.

In the present embodiment, described voltage conversion device 202 comprises rectification circuit 221, filter circuit 222, voltage control circuit 223 and input-switching circuit 224, the input of described rectification circuit 221 links to each other with described checkout gear 201 outputs, the output of described rectification circuit 221 is connected with the input of described filter circuit 222, form a voltage transitions branch road, be used for the ac voltage signal of input is converted to d. c. voltage signal and exports automatic switchover electric supply installation 203 to; The input of described input-switching circuit 224 links to each other with described AC signal input group by described rectification circuit 221, and output is connected with the control end of described voltage control circuit 223, forms the protection branch road that another links to each other with described AC signal input group; The input of described voltage control circuit 223 links to each other with the output of described filter circuit 222, and whether the d. c. voltage signal that is used to judge described output is in threshold range; If the d. c. voltage signal of described output is not in threshold range; the protection branch road that the conducting that then transmits control signal links to each other with described AC signal input group; make described AC signal input group instantaneous short-circuit; suppress the rising of described alternating voltage, guarantee the direct voltage operate as normal of automatic switchover electric supply installation 203 according to output.

In the present embodiment, described automatic switchover electric supply installation 203 comprises voltage stabilizing circuit 231, charge-discharge control circuit 232, storage battery 233, first diode 234 and second diode 235.Described voltage stabilizing circuit 231 is connected successively with described charge-discharge control circuit 232, described storage battery 233 and the positive pole of first diode 234, form the first power supply branch road, be used for carrying out giving after voltage stabilizing is handled described storage battery 233 chargings, and give described monitoring instrument power supply by described first diode 234 with the d. c. voltage signal of input; And the positive pole of described second diode 235 is connected with the output of described voltage stabilizing circuit 231, the negative pole of described second diode 235 is connected with described first diode, 234 negative poles, thereby form the second power supply branch road with described voltage stabilizing circuit 231, also can be used for to described monitoring instrument power supply; Two diode 234,235 parallel connections this moment, when negative pole connects together, when the anodal input of two diodes has voltage difference, then at first conducting of the diode that cathode voltage is high, public negative pole current potential is raise, the diode cathode voltage that forces down greater than positive electrical, thereby make the diode that positive electrical forces down can not conducting, it is back clamping, described like this, like this automatic switchover electric supply installation 203 just can select in the first power supply branch road and the second power supply branch road big one of them branch road of output voltage to give described monitoring instrument power supply.

Present embodiment is compared advantage with embodiment one and is: the technical scheme that present embodiment provides is simple because of making, be convenient to mass production, can satisfy great majority (as power 0.3 watt below) monitoring device application on common line not high to energy requirement, and the application of common monitoring device on the high temperature circuit.

In order better to embody the advantage of present embodiment, as shown in Figure 4, Fig. 4 obtains the structural representation of checkout gear the device of electric energy for present embodiment from the aerial high voltage power line cable.The package casing 312 of checkout gear 301 mainly is made up of a pair of overcoat that is provided with identical semi-annular chambers, the overcoat of described two semi-annular chambers is oppositely arranged, two overcoats, one side connects by pin, thereby described overcoat is rotated around bearing pin finish opening and closing movement, described annular core also is made up of two identical semi-circular iron cores, described one semi-circular iron core that is wound with one group of wire coil 313 is put into one of them semi-circular overcoat, the semi-circular iron core that again another is not twined wire coil is put into another semi-circular overcoat, two overcoat opposite sides make two semi-circular iron core group synthesize a complete annular core that is wound with one group of wire coil 311 two outer cover lockings by screw, this moment, package casing 312 also was a circulus, so described transmission of electricity cable passes described package casing 312 centers, described like this annular core 311 and package casing 312 are just formed the test side that is used to detect described aerial high-voltage cable alternating electromagnetic field on every side.But so when the high voltage cable transferring electric power described test side induction field just.

Package casing 312 links to each other with the metal sleeve 314 that is provided with voltage conversion device 302, corresponding at the wire hole on its junction package casing 312 with the entrance hole on the described metal sleeve, thereby form a defeated line passage 310, the input J1-1 that wire coil 313 1 ends connect on voltage conversion device 302 circuit boards by described defeated line passage 310, the other end is connected in series the input J1-2 that 7 heat sink resistance 315 connect on the described circuit board more successively by described defeated line passage 310.Described heat sink resistance is fixed on the inwall of described metal sleeve, and in order fully also to be provided with cooling pad between described resistance 315 of heat radiation and the described metal shell inwall.Described heat sink resistance 315 becomes AC signal input group with described annular core 311 mutual group that are wound with one group of wire coil 313, and the alternating voltage of Chan Shenging inputs in the circuit board of described voltage conversion device 302 just by described AC signal input group like this.

As shown in Figure 5, Fig. 5 is the circuit diagram of the voltage conversion device 302 of present embodiment.Voltage conversion device 302 comprises rectification circuit 321, ∏ type filter circuit 322, voltage control circuit 323 and input-switching circuit 324; J1-1 and J1-2 are ac voltage input in this circuit diagram, described rectification circuit 321 mainly is made up of two filter inductance L1, L2 and rectifier bridge B2, the input of described rectification circuit 321 is connected with J1-2 with J1-1, is used for the ac voltage signal of input is converted to the dc pulse voltage signal; Described ∏ type filter circuit 322 mainly is made up of inductance L 3, L4 and capacitor C 2, C3, C4, C5, the input of described ∏ type filter circuit 322 links to each other with rectifier bridge B2, and the dc pulse voltage signal that is mainly used in input carries out the voltage stabilizing processing and exports adaptive switched electric supply installation to; Voltage control circuit 323 is mainly by voltage-stabiliser tube W1, resistance R 5 and switch control element solid-state relay B 1 form, the input of voltage control circuit 323 links to each other with the output of described ∏ type filter circuit 322, the output of voltage control circuit 323 is output B1-1 and the B1-2 of solid-state relay B1, the public output S1-5 of double-point double-throw switch S1 in B1-1 and B1-2 and the input-switching circuit 324, S1-6 forms control switch, and be made as normally open. public output S1-5, the first switches set S1-1 of S1-6 and double-point double-throw switch S1, S1-3 connects, promptly be made as normally off, S1-1, S1-3 is connected with AC signal input group by rectification circuit 321. and when the direct voltage of ∏ type filter circuit 322 outputs was not higher than threshold value, the relay B1 on the voltage control circuit 323 did not produce control signal; After raising, electric current transmitted on the high voltage cable makes that the direct voltage that obtains also increases, when the direct voltage of ∏ type filter circuit 322 outputs is higher than threshold value, relay B1 is according to voltage-stabiliser tube W1, resistance R 5 and relay control end B1-3, the loop of voltage regulation conducting that B1-4 forms produces control signal and controls control relay B1 switch closure, make the short circuit of AC signal input group, having suppressed the rising of voltage. the electric capacity in the ∏ type filter circuit 322 provides direct voltage for subordinate's circuit at this moment, rectifier bridge B2 output voltage also begins to reduce, thereby the voltage of ∏ type filter circuit 322 outputs is dropped to below the threshold voltage, by voltage-stabiliser tube W1, resistance R 5 and relay control end B1-3, the loop of voltage regulation that B1-4 forms disconnects, relay B1 is disconnected according to the disconnection control relay switch of loop of voltage regulation, AC signal input group breaks away from short-circuit condition, its direct voltage by rectifier bridge output raises again gradually, when the direct voltage of output raises above threshold value once more, make the relay control switch closure again, so repeatedly, reaching a poised state at last, make the direct voltage of this circuit output remain at a metastable value. 303 galvanic currents according to input of adaptive switched electric supply installation are pressed and are selected in the first power supply branch roads and the second power supply branch road one of them big branch road of output voltage to give described monitoring instrument power supply.

And the heat that produces in this process is mainly passed by metal inner surface by heat-sink unit, has guaranteed the operate as normal of this circuit under high running current environment.This shows that the advantage of the utility model embodiment only is that by one group of coil can be the power supply of the high voltage cable monitoring instrument under the high running current environment just, improved in the complex environment useful life of monitoring instrument on the cable greatly.

Embodiment three, and as shown in Figure 6, Fig. 6 obtains the structured flowchart of the device of electric energy for present embodiment from the aerial high voltage power line cable.Checkout gear 401 comprises annular core 411 and the heat-sink unit 412 that is wound with two groups of wire coils, and this annular core 411 structures are identical with function and the foregoing description, so no longer be repeated in this description.After the fixation side of described annular core 411 package casings being untied and opening described one semi-circular iron core that is wound with two groups of wire coils is put into one of them semi-circular overcoat by active side, the semi-circular iron core that again another is not twined wire coil is put into another semi-circular overcoat, at last fixation side is fixed and make two semi-circular iron core group synthesize a complete annular core that is wound with one group of wire coil 411, this moment, package casing also was a circulus, so described transmission of electricity cable passes described package casing center, described like this annular core 411 and package casing are just formed the test side that is used to detect described aerial high-voltage cable alternating electromagnetic field on every side.But so when the high voltage cable transferring electric power described test side induction field just.Second group of wire coil two ends on the described annular core 411 all directly are connected with voltage conversion device 402, form the second AC signal input group (shown in frame of broken lines among Fig. 6); First group of wire coil one end on the described annular core 411 is connected with voltage conversion device 402, the other end is connected with described voltage conversion device 402 by described heat-sink unit 412, thereby forms the first AC signal input group (shown in frame of broken lines among Fig. 6) with described heat-sink unit 412; The described like this second AC signal input group is used for to the described ac voltage signal of described voltage conversion device 402 transmission; And the first AC signal input group is used for when the direct voltage of described voltage conversion device 402 outputs surpasses threshold value, counter magnetic flux is provided and suppresses the rising of described alternating voltage to described iron core 411, guarantees described automatic switchover electric supply installation 403 operate as normal; Wherein said heat-sink unit 412 is for one or more by described first group of high-power resistance that wire coil one end connects successively, described resistance is fixed on the described metal sleeve inwall of present embodiment, and in order also to fill by cooling pad is set in the slit of fully dispelling the heat between described resistance and the described metal shell inwall.

Described voltage conversion device 402 comprises rectification circuit 421, filter circuit 422, voltage control circuit 423 and input-switching circuit 424, the input of described rectification circuit 421 links to each other with described checkout gear 401 outputs, promptly be connected with the second AC signal input group in the present embodiment, the output of described rectification circuit 421 is connected with the input of described filter circuit 422, form a voltage transitions branch road, be used for the ac voltage signal of input is converted to d. c. voltage signal and exports automatic switchover electric supply installation 403 to; The input of described input-switching circuit 424 links to each other with the described first AC signal input group, and output is connected with the control end of described voltage control circuit 423, forms the protection branch road that another links to each other with the described first AC signal input group; The input of described voltage control circuit 423 links to each other with the output of described filter circuit 422, and whether the d. c. voltage signal that is used to judge described output is in threshold range; If the d. c. voltage signal of described output is not in threshold range; the protection branch road that the conducting that then transmits control signal links to each other with the described first AC signal input group; make the described first AC signal input group counter magnetic flux is provided and suppress the rising of described alternating voltage, guarantee the direct voltage operate as normal of automatic switchover electric supply installation 403 according to output to described iron core 411.

The structure of described automatic switchover electric supply installation 403 is identical with automatic switchover electric supply installation in function and the foregoing description, so present embodiment no longer is repeated in this description.

Monitoring instrument starts under lower circuit running current on the cable in order to make, second group of wire coil do not insert the heat-sink unit that contains heat sink resistance, and in order to make the monitoring instrument on the cable still can operate as normal under higher electric current, the number of turn of described first group of wire coil be more than the number of turn of described second group of coil.The current detecting of transmitting on according to high voltage cable when annular core 411 is during to electromagnetic field, by second group of wire coil with detected AC voltages transmission to the rectification circuit 421 of voltage conversion device 402, described alternating voltage is converted to direct voltage and exports automatic switchover electric supply installation 403 to through rectification circuit 421 and filter circuit 422.403 of described automatic switchover electric supply installations will select in the first power supply branch road and the second power supply branch road one of them big branch road of output voltage to give described monitoring instrument power supply after the direct voltage voltage stabilizing.But when the electric current of exporting on the cable raises; the electromagnetic field field intensity that detects increases; the alternating voltage that checkout gear obtains raises; the direct voltage of voltage conversion device 402 outputs also raises; when the magnitude of voltage of the described direct voltage of exporting is higher than the threshold value of voltage control circuit 423; the described voltage control circuit 423 protection branch road that conducting links to each other with the described first AC signal input group that transmits control signal; make the described first AC signal input group counter magnetic flux is provided and suppress the rising of described alternating voltage, guarantee the direct voltage operate as normal less than threshold value of automatic switchover electric supply installation 403 according to output to described iron core 411.The heat that produces when described iron core 411 provides counter magnetic flux and suppress the rising of described alternating voltage in the described first AC signal input group then dissipates by heat-sink unit.

Present embodiment is compared advantage with the foregoing description and is: the technical scheme that present embodiment provides more is applicable in the monitoring instrument on the high voltage cable of conventional environment.Because need lower circuit running current necessary electric energy is provided can for described monitoring instrument following of this conventional environment, device work is lower to environment requirement, and whole apparatus structure is simple, and is in light weight, and the prospect of popularizing is preferably arranged.

The advantage that is embodied for better explanation present embodiment technical scheme, as shown in Figure 7, Fig. 7 obtains the structural representation of checkout gear the device of electric energy for present embodiment from the aerial high voltage power line cable.The structure of the package casing 512 of checkout gear 501 is identical with the 26S Proteasome Structure and Function of package casing 312 among function and the embodiment three, so no longer repeat specification of present embodiment.Described one semi-circular iron core that is wound with two groups of wire coils 513 is put into 512 1 semi-circular overcoats of package casing, and wherein first group of wire coil number of turn is greater than second group of wire coil number of turn.The semi-circular iron core that again another is not twined wire coil is put into another semi-circular overcoat, two overcoat opposite sides make two semi-circular iron core group synthesize a complete annular core that is wound with one group of wire coil 511 two outer cover lockings by screw, this moment, package casing 512 also was a circulus, so described transmission of electricity cable passes described package casing 512 centers, described like this annular core 511 and package casing 512 are just formed the test side that is used to detect described aerial high-voltage cable alternating electromagnetic field on every side.Described package casing 512 links to each other with the metal sleeve 514 that is provided with described voltage conversion device 502, corresponding at the wire hole on the described package casing in its junction with the entrance hole on the described metal sleeve, thereby form a defeated line passage 510, second group of wire coil two ends by described defeated line passage 510 directly with the circuit board that is provided with voltage conversion device 502 on J1-1 link to each other with the J1-2 input, be the second AC signal input group; First group of wire coil one end passes described defeated line passage 510 and links to each other with J2-1 input on the circuit board that is provided with voltage conversion device, the other end passes that described defeated line passage 510 is connected in series 7 heat sink resistance 515 back more successively and the J2-2 inputs on the described circuit board link to each other, and is the first AC signal input group; Described heat sink resistance 515 is fixed on the metal shell inwall of described metal sleeve, and in order fully also to be provided with cooling pad between described resistance 515 of heat radiation and the described metal shell inwall.So but described test side is with regard to induction field when the high voltage cable transferring electric power, the alternating voltage of Chan Shenging inputs in the circuit board of described voltage conversion device 502 just by the described second AC signal input group like this.

As shown in Figure 8, Fig. 8 is the circuit diagram of the voltage conversion device of present embodiment. described voltage conversion device 502 comprises rectification circuit 521, ∏ type filter circuit 522, voltage control circuit 523 and input-switching circuit 524; J1-1 and J1-2 are ac voltage input in this circuit diagram, described rectification circuit 521 mainly is made up of two filter inductance L1, L2 and rectifier bridge B2, the input of described rectification circuit 521 is connected with J1-2 with J1-1, is used for the ac voltage signal of input is converted to the dc pulse voltage signal; Described ∏ type filter circuit 522 mainly is made up of inductance L 3, L4 and capacitor C 2, C3, C4, C5, the input of described ∏ type filter circuit 522 links to each other with rectifier bridge B2, and the dc pulse voltage signal that is mainly used in input carries out the voltage stabilizing processing and exports adaptive switched power supply unit to; Described voltage control circuit 523 is mainly by voltage-stabiliser tube W1, resistance R 5 and switch control element solid-state relay B1 form, the input of described voltage control circuit 523 links to each other with the output of described ∏ type filter circuit 522, the output of described voltage control circuit 523 is output B1-1 and the B1-2 of solid-state relay B1, the public output S1-5 of double-point double-throw switch S1 in B1-1 and B1-2 and the input-switching circuit 524, S1-6 forms control switch, and be made as normally open. described public output S1-5, the second switch group S1-2 of S1-6 and double-point double-throw switch S1, S1-4 connects, promptly be made as normally off, so that described double-point double-throw switch S1 is connected with the described first AC signal input group. when the direct voltage of ∏ type filter circuit 522 outputs was not higher than threshold value, the relay B1 on the voltage control circuit 523 did not produce control signal; After raising, electric current transmitted on the high voltage cable makes that the direct voltage that obtains also increases, when the direct voltage of ∏ type filter circuit 522 outputs is higher than threshold value, relay B1 is according to voltage-stabiliser tube W1, resistance R 5 and relay control end B1-3, the loop of voltage regulation conducting that B1-4 forms produces control signal and controls the control switch closure, make the described first AC signal input group conducting produce exciting current, iron core is carried out reverse excitation, reducing the magnetic flux in the iron core, thereby suppressed the rising of second group of wire coil alternating voltage. adaptive switched power supply unit 503 is powered to described monitoring instrument according to one of them big branch road of output voltage in the galvanic current pressure selection first power supply branch road of importing and the second power supply branch road.

According to the magnetic potential balance principle, when the number of turn of first wire coil is abundant, can in broad lead running current scope, make the output voltage peak value of second group of wire coil remain on a lower level, further guarantee the operate as normal of subsequent conditioning circuit.And the heat that produces in said process is all passed by metal inner surface by heat-sink unit, has also guaranteed the operate as normal of this circuit under high running current environment.Working method and process about adaptive switched power supply unit are same as the previously described embodiments, so repeated description no longer.

The first switches set S1-1, S1-3 and public output S1-5, the S1-6 of double-point double-throw switch S1 is made as normally open in the present embodiment, and described S1-1, S1-3 are connected with J1-2 with the J1-1 of described ac voltage input by rectification circuit 321.When the wire coil on the annular core is one group, described wire coil one end is linked to each other with the J1-1 of ac voltage input, the other end is connected in series successively after 7 heat sink resistance with J1-2 input on the described circuit board and links to each other, this moment, J2-1 and J2-2 were empty, again the described first switches set S1-1, S1-3 and public output S1-5, S1-6 are made as normally off (this moment, second switch group and public output S1-5, S1-6 were normally open), are the voltage conversion device among the embodiment three.The circuit board that has comprised input-switching circuit like this has stronger compatibility to different checkout gears, is convenient to realize the mass production of product.

The advantage of present embodiment is: not only go in the monitoring instrument on the high voltage cable of conventional environment, because need lower running current necessary electric energy is provided for described monitoring instrument following of this conventional environment, and owing to be provided with heat-sink unit, make that unnecessary inductive energy can well distribute under higher cable running current situation, this device is also applicable to the higher circuit of running current.And whole apparatus structure is simple, and is in light weight, and the prospect of popularizing is preferably arranged.And this device just can adapt to other complex environments after doing simple modification according to different environment and needs, the scope of application and the flexibility of this device have been strengthened greatly, as long as it is after knowing the use scene of this device and condition in advance its circuit simply is provided with and can uses, very convenient.

Embodiment four, the foregoing description all is to realize on the basis of after the scene (as common line or high temperature circuit) of knowing the device utilization of obtaining electric energy in advance relevant apparatus having been carried out being provided with and revising, in the face of wide circuit running current scope and the bigger simultaneous situation of monitoring instrument energy consumption, as not taking special measure as increasing by the first AC signal input group coil turn, increase area of dissipation etc., cannot say for sure to demonstrate,prove instrument works under limiting case reliably and with long-term. provide a kind of device that obtains electric energy from the aerial high voltage power line cable based on this present embodiment, one group of suitable coil guarantees checkout gear equal operate as normal under any line current environment thereby but this device can be selected the number of turn automatically. make this device can adapt to most circuit environment, good popularization is arranged.

As shown in Figure 9, Fig. 9 obtains the structured flowchart of the device of electric energy for present embodiment from the aerial high voltage power line cable.This device still comprises checkout gear 601, voltage conversion device 602 and automatic switchover electric supply installation 603.

Described checkout gear 601 comprises annular core 611 and the two groups of heat-sink units 612 that are wound with two groups of wire coils (first group of wire coil number of turn is greater than second group of wire coil number of turn), 613, thereby this annular core 611 is enclosed within on the high voltage cable induction field when the high voltage cable transferring electric power by disconnecting the annular outer cover that connects again, first group of wire coil one end on the described annular core 611 is connected with voltage conversion device 602, the other end is connected with described voltage conversion device 602 by first heat-sink unit 612, thereby forms the first AC signal input group (shown in frame of broken lines among Fig. 9) with described first heat-sink unit 612; Second group of wire coil one end on the described annular core 611 is connected with voltage conversion device 602, the other end is connected with described voltage conversion device 602 by second heat-sink unit 613, thereby forms the second AC signal input group (shown in frame of broken lines among Fig. 9) with described second heat-sink unit 613; The described like this first AC signal input group and the second AC signal input group all can be used for to the described ac voltage signal of described voltage conversion device 602 transmission; Wherein said heat-sink unit 612,613 is one or more respectively by described first, the high-power resistance that two wire coils, one end connects successively, described resistance is fixed on the metal shell inwall of described metal sleeve of present embodiment, and for the slit of fully dispelling the heat between described resistance and the described metal shell inwall also also is provided with the temperature sensor (not shown) by being provided with on cooling pad filling and described first heat-sink unit 612, control module 604 in the monitoring instrument on described temperature sensor and the described transmission of electricity cable (not shown) that links to each other, the temperature that is used for detecting on the described heat-sink unit sends to described control module 604; Described control module 604 judges that according to the temperature value that receives whether the temperature on the described heat-sink unit surpasses preset range, if surpass preset range, then sends first control signal; Described control module 604 also is used for judging and if the electric weight in the storage battery on the described automatic switchover electric supply installation is lower than predetermined value, then sends second control signal when whether the electric weight of the storage battery on the described automatic switchover electric supply installation is lower than predetermined value;

Described voltage conversion device 602 comprises input-switching circuit 621, rectification circuit 622, filter circuit 623 and voltage control circuit 624; The input of described input-switching circuit 621 can select to connect the output of the described first AC signal input group or the output of the second AC signal input group, the output of described input-switching circuit 621 links to each other with the input of described rectification circuit 622, be used for selecting to connect the output of the first AC signal input group or the second AC signal input group, with the input ac voltage signal according to receiving described first control signal or second control signal; Described rectification circuit 622 is connected with described filter circuit 623, forms the voltage transitions branch road, is used for the ac voltage signal of input is converted to d. c. voltage signal and exports automatic switchover electric supply installation 603 to; The input of described voltage control circuit 624 links to each other with the output of described filter circuit, output links to each other with the output of input-switching circuit 621 by described rectification circuit 622, thereby form the protection branch road with the described first AC signal input group or the second AC signal input group, whether the d. c. voltage signal that is used to judge described output is in threshold range; If the d. c. voltage signal of described output is not in threshold range; the protection branch road that the conducting that then transmits control signal links to each other with the described first or second AC signal input group; thereby make the described first or second AC signal input group short circuit suppress the rising of filter circuit output voltage; guarantee the direct voltage operate as normal of described automatic switchover electric supply installation according to output; principle is with embodiment two, so no longer repeat specification in detail.

Described automatic switchover electric supply installation 603 comprises voltage stabilizing circuit 631, charge-discharge control circuit 632, storage battery 633, first diode 634 and second diode 635.Its circuit is formed same as the previously described embodiments, so no longer repeat specification.

The input of acquiescence input-switching circuit 621 is connected with the output of the first AC signal input group of more coil turn during the beginning of this device, to reduce the initial circuit operating current of cable monitoring instrument, i.e. starting current.Originally checkout gear 601 obtains ac voltage signal and exports described ac voltage signal to voltage conversion device 602 by the first AC signal input group, rectification circuit 622 links to each other with the first AC signal input group by input-switching circuit 621 with the voltage transitions branch road that filter circuit 623 is formed, thereby described ac voltage signal is converted to d. c. voltage signal and exports automatic switchover electric supply installation 603 to.603 of described automatic switchover electric supply installations will select in the first power supply branch road and the second power supply branch road one of them big branch road of output voltage to give described monitoring instrument power supply after the direct voltage voltage stabilizing.But when electric current transmitted on the cable raises; the electromagnetic field field intensity that detects increases; the alternating voltage that checkout gear obtains raises; the direct voltage of voltage conversion device 602 outputs also raises; when the magnitude of voltage of the described direct voltage of exporting is higher than the threshold value of voltage control circuit 624; the voltage control circuit 624 protection branch road that conducting links to each other with the described first AC signal input group that transmits control signal then; make and the described first AC signal input group short circuit guarantee the direct voltage operate as normal of described automatic switchover electric supply installation according to output.Rising along with the circuit running current, temperature on the heat-sink unit 612 also can raise gradually, when the temperature sensor that is provided with on according to first heat-sink unit 612 when the control module 604 in the monitoring instrument on the described transmission of electricity cable detects temperature on described first heat-sink unit 612 and surpasses preset range, send first control signal; After described input-switching circuit 621 receives described first control signal, disconnect and being connected of the described first AC signal input group, set up and being connected of the second AC signal input group output that less coil turn is arranged.Thereby reduce the alternating voltage peak of voltage transitions branch road input, and then reduce the heating of whole energy taking device.So both can effectively reduce heating, guarantee on-line monitoring instrument work safety, guarantee again that this device still can power to the monitoring instrument on the cable.But after after a while, the circuit running current might reduce, and the voltage of second AC signal input group induction is reduced, and causes 602 output voltage to be lower than the operating voltage of monitoring instrument, can not power for detecting instrument, can only provide electric energy this moment by the storage battery on the monitoring instrument.Power supply along with storage battery, its voltage also descends thereupon, this moment, described control module 604 can judge whether the electric weight in the storage battery on the described automatic switchover electric supply installation is lower than the electric weight minimum, if the electric weight in the described storage battery is lower than the electric weight minimum of setting, then control module 604 sends second control signal; After described input-switching circuit 621 received described second control signal, disconnection was connected with the described second AC signal input group, and foundation is connected with the first AC signal input group output.Thereby the alternating voltage that raises and obtain, and then the direct voltage of boosted voltage conversion equipment 602 outputs.And then ensure to charge in batteries or provide higher voltage to carry out the energy supply to the monitoring instrument on the cable.

The advantage of the utility model embodiment is: according to the automatic fully AC signal group of selecting input of actual track running current situation, thereby simultaneous adaptation is given the power supply of the monitoring instrument on the described cable in the environment of the less and bigger cable of running current.

The combining structure of annular core that need to prove checkout gear comprises in the present embodiment package casing, is wound with two groups of wire coils is all identical with embodiment four, so be not repeated in this description.

For the advantage that the present embodiment technical scheme is embodied better is described, as shown in figure 10, Figure 10 obtains the structural representation of checkout gear the device of electric energy for present embodiment from the aerial high voltage power line cable. and annular core 711 is arranged in the annular encapsulating shell, be wound with two groups of wire coils on the described iron core 711, wherein, the coil turn of first group of wire coil is greater than the coil turn of second wire coil. and the J1-1 input on the circuit board of first group of wire coil one end and voltage conversion device links to each other, the other end is connected in series successively after 3 heat sink resistance with J1-2 input on the described circuit board and links to each other, form the first AC signal input group, wherein said three resistance are formed first heat-sink unit 713; J2-1 input on the circuit board of second group of wire coil one end and voltage conversion device links to each other, the other end is connected in series successively after 3 heat sink resistance with J2-2 input on the described circuit board and links to each other, form the second AC signal input group, wherein said three resistance are formed second heat-sink unit 712; Described heat sink resistance is fixed on the metal sleeve inwall, and in order fully also to be provided with cooling pad between each resistance of heat radiation and the described metal shell inwall. and also be provided with the temperature sensor (not shown) on the resistance in described first heat-sink unit 713, control module in the monitoring instrument on described temperature sensor and the described transmission of electricity cable links to each other, and the temperature that is used for detecting on the described heat-sink unit sends to described control module; Described control module judges that according to the temperature value that receives whether the temperature on the described heat-sink unit surpasses preset range, if surpass preset range, then sends first control signal; Described control module is used for also judging whether the electric weight of the storage battery on the described automatic switchover electric supply installation is lower than threshold value, if the electric weight in the described storage battery is lower than threshold value, then sends second control signal; Described iron core 711 is enclosed within on the high voltage cable by disconnecting the annular outer cover that connects again, thereby induction field when the high voltage cable transferring electric power, the alternating voltage of Chan Shenging inputs in the circuit board of described voltage conversion device 702 just by the described first or second AC signal input group like this.

As shown in figure 11, Figure 11 is the circuit diagram of the voltage conversion device of present embodiment. described voltage conversion device 702 comprises input-switching circuit 721, rectification circuit 722, filter circuit 723 and voltage control circuit 724; J1-1, J1-2 and J2-1, J2-2 are ac voltage input in this circuit diagram, described input-switching circuit 721 comprises that first group of input B0-1, B0-3 of the relay B0. relay B0 of band dpdt double-pole double-throw (DPDT) function are connected with J1-1, J1-2, are made as normally off; Second group of input B0-2, B0-4 are connected with J2-1, J2-2, are made as normally open; B0 public output B0-5, B0-6 link to each other with the input of rectification circuit 722, relay B0 controls the open and-shut mode of first group of input and second group of input according to receiving first or second control signal by control end B0-7, B0-8. and described rectification circuit 722 mainly is made up of two filter inductance L1, L2 and rectifier bridge B2, is used for the ac voltage signal of input is converted to the dc pulse voltage signal; Described ∏ type filter circuit 723 mainly is made up of inductance L 3, L4 and capacitor C 2, C3, C4, C5, the input of described ∏ type filter circuit 723 links to each other with rectifier bridge B2, and the dc pulse voltage signal that is mainly used in input carries out the voltage stabilizing processing and exports adaptive switched power supply unit to; Described voltage control circuit 724 is mainly by voltage-stabiliser tube W1, resistance R 5 and switch control element solid-state relay B1 form, the input of described voltage control circuit 724 links to each other with the output of described ∏ type filter circuit 723, the output B1-1 of described solid-state relay B1, B1-2 is connected with rectification circuit 722. when checkout gear obtains ac voltage signal and exports described ac voltage signal to J1-1 by the first AC signal input group, J1-2, the voltage transitions branch road that rectification circuit 722 and filter circuit 723 are formed is by B0 and input J1-1, J1-2 links to each other, thereby described ac voltage signal being converted to d. c. voltage signal and exporting the automatic switchover electric supply installation to. described automatic switchover electric supply installation then will select one of them big branch road of output voltage in the first power supply branch road and the second power supply branch road to give described monitoring instrument power supply after the direct voltage voltage stabilizing. but when the electric current rising of exporting on the cable, the electromagnetic field field intensity that detects increases, the alternating voltage that checkout gear obtains raises, the direct voltage of voltage conversion device 702 outputs also raises, when the magnitude of voltage of the described direct voltage of exporting is higher than the threshold value of voltage control circuit 724, voltage control circuit 724 branch road that conducting links to each other with the described first AC signal input group that transmits control signal then, make the described first AC signal input group short circuit and suppress the rising of described alternating voltage, guarantee the direct voltage operate as normal of described automatic switchover electric supply installation according to output. but the temperature of resistance on first heat-sink unit 713 is raise, when the temperature sensor that is provided with on according to resistance when the control module in the monitoring instrument on the described transmission of electricity cable 704 detects temperature on described first heat-sink unit 713 and surpasses preset range, send first control signal; After B0 receives described first control signal, disconnect and J1-1, the connection of J1-2, set up and J2-1, the connection of J2-2, thereby promptly be connected with the second AC signal input group. reduce the alternating voltage that obtains, and then the direct voltage of reduction output. so both can effectively reduce heat sink resistance and device heating, guaranteed that again this device still can power to the monitoring instrument on the cable. but since on the second AC signal input group number of turn of wire coil less, after after a while, the circuit running current might reduce, the voltage of second AC signal input group induction is reduced, cause the output voltage of voltage conversion device to be lower than the operating voltage of monitoring instrument, can not power for monitoring instrument, can only provide electric energy this moment by the storage battery on the automatic switchover electric supply installation, battery tension also descends thereupon, this moment, described control module 704 can judge whether the electric weight in the storage battery on the described automatic switchover electric supply installation is lower than the electric weight minimum, if the electric weight in the storage battery on the described automatic switchover electric supply installation is lower than the electric weight minimum of setting, then send second control signal; After described B0 receives described second control signal, disconnection is connected with J2-1, J2-2's, thereby foundation is connected with J1-1, J1-2's. the alternating voltage that raises and obtain, and then the direct voltage of the output that raises. and then ensure to charge in batteries or provide higher voltage to the monitoring instrument on the cable.

The advantage of present embodiment is: come to select to connect the first or second AC signal group according to control signal by the relay for the treatment of the dpdt double-pole double-throw (DPDT) function, thereby change input voltage according to different environment and situation, thereby simultaneous adaptation is given the power supply of the monitoring instrument on the described cable in the environment of the less and bigger cable of running current.

Need to prove in the present embodiment after switching to the second AC signal input group, it is still very high that the transmission of electricity cable is uploaded defeated electric current, even may also can continue to raise, but because the coil turn in the second AC signal input group is less, even when the transmission of electricity cable is uploaded defeated electric current for maximum, such as the 1500A in the reality, the caloric value of second heat-sink unit can be very not high yet in the second AC signal input group, can remain on the temperature range of a safety, thereby guarantee that the device in the present embodiment still can operate as normal.

The package casing that checkout gear comprises, the combining structure of annular core that is wound with two groups of wire coils are all identical with embodiment three, so be not repeated in this description.

Though in conjunction with the accompanying drawings embodiment of the present utility model is described, but be understandable that, above-mentioned embodiment is exemplary, and it is also nonrestrictive, concerning the one of ordinary skilled in the art, can carry out multiple change and/or modification under the prerequisite of step disengaging the utility model design, this kind change and/or modification must be thought in the application scope of disclosure.

Claims

1. one kind is obtained the device of electric energy from the transmission of electricity cable, it is characterized in that described device comprises, checkout gear is used to detect the alternating electromagnetic field around the described cable and obtains ac voltage signal according to detected described electromagnetic field field intensity; Voltage conversion device is used for the ac voltage signal that described checkout gear obtains is converted to d. c. voltage signal, and exports described d. c. voltage signal.

2. the device that obtains electric energy from the transmission of electricity cable according to claim 1, it is characterized in that, described checkout gear comprises package casing and is wound with the annular core of at least one group of wire coil, be provided with the annular closed cavity in the described package casing, form the test side that is used to detect alternating electromagnetic field around the described cable thereby described iron core is arranged in the described cavity with described package casing, described test side inputs to described voltage conversion device with the metal wire of detected ac voltage signal by the wire coil two ends.

3. the device that obtains electric energy from the transmission of electricity cable according to claim 2, it is characterized in that, described checkout gear also comprises metal sleeve, described voltage conversion device is arranged in the described metal sleeve, entrance hole on the described metal sleeve is failed the line passage with corresponding the connecting to form of wire hole on the described package casing, so that described metal wire connects described voltage conversion device by defeated line passage.

4. the device that obtains electric energy from the transmission of electricity cable according to claim 3, it is characterized in that, described package casing mainly is made up of a pair of overcoat that is provided with identical semi-annular chambers, the overcoat of described two semi-annular chambers is oppositely arranged, and described two overcoats, one side flexibly connects, thereby the fixedly connected package casing with described annular closed cavity of forming of opposite side is so that described transmission of electricity cable passes described package casing center.

5. the device that obtains electric energy from the transmission of electricity cable according to claim 1, it is characterized in that, described device also comprises, the automatic switchover electric supply installation, be used for the d. c. voltage signal of described voltage conversion device conversion is converted to the battery charge that voltage regulation signal is given described automatic switchover electric supply installation, and select described battery automatically or export described voltage regulation signal to provide power supply to the monitoring instrument on the described transmission of electricity cable.

6. the device that obtains electric energy from the transmission of electricity cable according to claim 4, it is characterized in that, described device also comprises, the automatic switchover electric supply installation, be used for the d. c. voltage signal of described voltage conversion device conversion is converted to the battery charge that voltage regulation signal is given described automatic switchover electric supply installation, and select described battery automatically or export described voltage regulation signal to provide power supply to the monitoring instrument on the described transmission of electricity cable.

7. according to claim 6ly obtain the device of electric energy, it is characterized in that described automatic switchover electric supply installation comprises voltage stabilizing circuit, charge-discharge control circuit, storage battery, first diode and second diode from the transmission of electricity cable,

8. the device that obtains electric energy from the transmission of electricity cable according to claim 7, it is characterized in that, also be provided with heat-sink unit in the described metal sleeve, there is an end of one group of wire coil directly to be connected in the described checkout gear with described voltage conversion device, the other end connects described voltage conversion device after being connected in series one group of heat-sink unit, form the first AC signal input group that is used for to described voltage conversion device output AC voltage signal.

9. the device that obtains electric energy from the transmission of electricity cable according to claim 7, it is characterized in that, also be provided with heat-sink unit in the described metal sleeve, described checkout gear comprises the first AC signal input group and the second AC signal input group, the described first AC signal input group and the second AC signal input group respectively comprise one group of wire coil, and the coil turn in the described first AC signal input group is greater than the number of turn of coil in the second AC signal input group;

Wire coil two ends in the described second AC signal input group directly are connected with described voltage conversion device, are used for to described voltage conversion device output AC voltage signal;

Wire coil one end in the described first AC signal input group directly is connected with described voltage conversion device, the other end connects described voltage conversion device after being connected in series one group of heat-sink unit, be used for when the direct voltage of described voltage conversion device output surpasses threshold value, providing counter magnetic flux, suppress the rising of the described second AC signal input group output AC voltage with this to described iron core.

10. according to Claim 8 or 9 describedly obtain the device of electric energy, it is characterized in that described voltage conversion device comprises voltage conversion circuit, voltage control circuit and input-switching circuit from the transmission of electricity cable,

Described input-switching circuit, be used for after receiving described control signal, set up being connected of the described first AC signal input group and described voltage control circuit, make and the described first AC signal input group instantaneous short-circuit or provide counter magnetic flux suppress the rising of described alternating voltage with this to described iron core.

11. the device that obtains electric energy from the transmission of electricity cable according to claim 7, it is characterized in that, also be provided with two groups of heat-sink units in the described metal sleeve, described checkout gear comprises the first AC signal input group and the second AC signal input group, the described first AC signal input group and the second AC signal input group respectively comprise one group of wire coil, and the coil turn in the described first AC signal input group is greater than the number of turn of coil in the second AC signal input group;

Wire coil one end in the described first AC signal input group directly is connected with described voltage conversion device, the other end connects described voltage conversion device after being connected in series one group of heat-sink unit, wire coil one end in the described second AC signal input group directly is connected with described voltage conversion device, and another connects described voltage conversion device after organizing heat-sink unit to the other end by serial connection;

Described voltage conversion device selects to connect the described first AC signal input group and the second AC signal input group according to the temperature or the electric weight in the storage battery on the described automatic switchover electric supply installation of the heat-sink unit in the described first AC signal input group.

12. the device that obtains electric energy from the transmission of electricity cable according to claim 11, it is characterized in that, described voltage conversion device selects the described first AC signal input group of connection and the second AC signal input group to be specially according to the temperature or the electric weight in the storage battery on the described automatic switchover electric supply installation of described heat-sink unit

13. 9, the 11 or 12 described devices that obtain electric energy from the transmission of electricity cable according to Claim 8,, it is characterized in that, described one group of heat-sink unit is one or more high-power resistances, described resistance is fixed on the inwall of described metal sleeve, also is provided with cooling pad between described resistance and the described metal sleeve inwall.