CN216560723U - Wireless device for cable load current induction energy taking and measurement - Google Patents
Wireless device for cable load current induction energy taking and measurement Download PDFInfo
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- CN216560723U CN216560723U CN202122310801.6U CN202122310801U CN216560723U CN 216560723 U CN216560723 U CN 216560723U CN 202122310801 U CN202122310801 U CN 202122310801U CN 216560723 U CN216560723 U CN 216560723U
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Abstract
The utility model provides a wireless device for induction energy taking and measurement of cable load current, which comprises a shell, a circuit board, a Rogowski coil, a soft magnetic alloy strip, an induction coil and a temperature probe, wherein the circuit board and the induction coil are arranged in the shell, an output line of the induction coil, an output line of the Rogowski coil and the temperature probe are electrically connected with the circuit board, the soft magnetic alloy strip penetrates through the induction coil, one end of the soft magnetic alloy strip is detachably connected with the other end of the soft magnetic alloy strip to form a closed loop, and one end of the output line of the Rogowski coil is detachably connected with the other end of the soft magnetic alloy strip. The utility model has high energy taking efficiency; the large current does not generate heat, and the current measurement range is wide; the installation is simple, and Rogowski coils and soft magnetic alloy strips with different sizes can be replaced for measured objects with different sizes; a rechargeable backup power supply; the cost is low.
Description
Technical Field
The utility model relates to the technical field of wireless communication devices, in particular to a wireless device for cable load current induction energy taking and measurement.
Background
With the development of sensor technology and internet of things technology, more and more power equipment is required to carry out online monitoring on temperature, load current and the like. In order to meet the requirements of longer service life and environmental protection, passive electricity-taking technology is often adopted to replace disposable batteries.
The common magnetic field electricity taking and current measurement adopts an electromagnetic current transformer mode, the electromagnetic current transformer electricity taking is easy to generate heat and even burn under the condition of large current, and the problems of complex insulating structure, easy saturation of a magnetic core, and easy rusting and precision reduction caused by long-time use when the electromagnetic current transformer is used for measuring current exist. The electromagnetic current transformer has a small current measuring range, and if the measuring range is required to be enlarged, the structure is very large, and the electromagnetic current transformer is inconvenient to install.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a wireless device for cable load current induction energy taking and measurement, which solves the problems that the electromagnetic current transformer is easy to heat or even burn out under the condition of high current, the electromagnetic current transformer is complex in insulation structure, easy to saturate a magnetic core, easy to rust after long-time use and low in precision when used for measuring current, and the structure is very large and inconvenient to install if the measurement range is increased.
The utility model provides a wireless device for cable load current induction energy taking and measurement, which comprises a shell, a circuit board, a Rogowski coil, a soft magnetic alloy strip, an induction coil and a temperature probe, wherein the circuit board and the induction coil are arranged in the shell, an output line of the induction coil, an output line of the Rogowski coil and the temperature probe are electrically connected with the circuit board, the soft magnetic alloy strip penetrates through the induction coil, one end of the soft magnetic alloy strip is detachably connected with the other end of the soft magnetic alloy strip to form a closed loop, and one end of the output line of the Rogowski coil is detachably connected with the other end of the soft magnetic alloy strip.
Further, the shell comprises an upper shell, a middle shell and a lower shell, the circuit board and the induction coil are arranged in the middle shell, and the middle shell, the circuit board and the induction coil are assembled together through the upper shell and the lower shell.
Furthermore, a through hole is formed in the middle shell, and the soft magnetic alloy strip penetrates through the induction coil through the through hole.
Further, the soft magnetic alloy belt fixing device further comprises a fixing buckle, wherein a mounting hole is formed in the upper shell, and the fixing buckle penetrates through the mounting hole to fix one end and the other end of the soft magnetic alloy belt.
Furthermore, one end of an output wire of the rogowski coil is fixed on the middle shell, and the other end of the output wire of the rogowski coil is detachably connected with the middle shell.
Further, the circuit board is disposed on a side of the middle case facing the upper case, and the induction coil is disposed on a side of the middle case facing the lower case.
Further, still include the high temperature ribbon, the high temperature ribbon is fixed between the middle casing and the inferior valve.
Furthermore, the soft magnetic alloy strip and the Rogowski coil are sleeved with a silica gel sleeve.
Further, the output line of the Rogowski coil is electrically connected with the circuit board through a spring pin or an earphone hole.
Furthermore, the width of the soft magnetic alloy strip is 9-11 mm, and the thickness of the soft magnetic alloy strip is 0.1-0.3 mm.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a wireless device for induction energy taking and measurement of cable load current, which comprises a shell, a circuit board, a Rogowski coil, a soft magnetic alloy strip, an induction coil and a temperature probe, wherein the circuit board and the induction coil are arranged in the shell, an output line of the induction coil, an output line of the Rogowski coil and the temperature probe are electrically connected with the circuit board, the soft magnetic alloy strip penetrates through the induction coil, one end of the soft magnetic alloy strip is detachably connected with the other end of the soft magnetic alloy strip to form a closed loop, and one end of the output line of the Rogowski coil is detachably connected with the other end of the soft magnetic alloy strip. The utility model adopts the soft magnetic alloy belt to get electricity, the soft magnetic alloy belt has the characteristics of high initial magnetic permeability and small saturation current, and the material is soft and is easy to be arranged on the measured objects with different shapes. In order to solve the problems of narrow current measurement range and easy heating of the magnetic core, the Rogowski coil is adopted for current measurement, and has the characteristics of no heating, wide measurement range, small volume, light weight, easy opening installation and the like. The utility model has high energy taking efficiency; the large current does not generate heat, and the current measurement range is wide; the installation is simple, and Rogowski coils and soft magnetic alloy strips with different sizes can be replaced for measured objects with different sizes; a rechargeable standby power supply; the cost is low.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:
FIG. 1 is a schematic structural diagram of a wireless device for cable load current induction energy acquisition and measurement according to the present invention;
FIG. 2 is an exploded view of a wireless device for cable load current sensing, energy acquisition and measurement according to the present invention;
FIG. 3 is a schematic diagram showing the output of the coil of the soft magnetic alloy strip at 1A according to the embodiment of the present invention;
FIG. 4 is a schematic diagram showing the output of the coil of the soft magnetic alloy strip at 5A according to the embodiment of the present invention;
FIG. 5 is a diagram showing the output of the coil of the soft magnetic alloy strip at 20A according to the embodiment of the present invention;
FIG. 6 is a schematic diagram showing the output of a coil of a soft magnetic alloy strip at 200A according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating RMS voltage values of open-circuit outputs of coils at different currents according to an embodiment of the utility model;
FIG. 8 is a schematic diagram of an internal circuit according to an embodiment of the present invention.
In the figure: 1. a housing; 11. an upper shell; 12. a middle shell; 13. a lower case; 2. a circuit board; 3. a soft magnetic alloy ribbon; 4. a Rogowski coil; 5. a silica gel sleeve; 6. high-temperature binding; 7. a fixing buckle; 8. an induction coil; 9. a temperature probe.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
A wireless device for induction energy taking and measurement of cable load current can be used for current and temperature measurement of high-voltage equipment such as a through-current cable, a busbar and the like and a power transmission line and the like, as shown in figures 1 and 2, the wireless device comprises a shell 1, a circuit board 2, a Rogowski coil 4, a soft magnetic alloy strip 3, an induction coil 8 and a temperature probe 9, wherein the circuit board 2 and the induction coil 8 are arranged in the shell 1, an output line of the induction coil 8, an output line of the Rogowski coil 4 and the temperature probe 9 are electrically connected with the circuit board 2, the temperature probe 9 is connected to play a role in measuring the temperature of a measured object, the soft magnetic alloy strip 3 penetrates through the induction coil 8, one end of the soft magnetic alloy strip 3 is detachably connected with the other end to form a closed loop, and one end of the output line of the Rogowski coil 4 is detachably connected with the other end. An energy collecting circuit, a power supply management circuit, an integrating circuit matched with the Rogowski coil 4, a main control chip and the like are distributed on the circuit board 2.
As shown in fig. 2, the housing 1 includes an upper case 11, a middle case 12, and a lower case 13, the circuit board 2 and the induction coil 8 are placed in the middle case 12, and the upper case 11 and the lower case 13 assemble the middle case 12 with the circuit board 2 and the induction coil 8. The wiring board 2 is placed in the middle case 12 on the side facing the upper case 11, and the induction coil 8 is placed in the middle case 12 on the side facing the lower case 13. The shell 1 is used for protecting the structure of the circuit board 2, the fixed Rogowski coil 4, the soft magnetic alloy strip 3 and the induction coil 8.
The middle shell 12 is provided with a through hole, and the soft magnetic alloy strip 3 passes through the induction coil 8 through the through hole. The soft magnetic alloy belt type power supply device is characterized by further comprising a fixing buckle 7, a mounting hole is formed in the upper shell 11, the fixing buckle 7 penetrates through the mounting hole to fix one end and the other end of the soft magnetic alloy belt 3, the soft magnetic alloy belt 3 is locked through the fixing buckle 7 to form a ring sleeve on the through-flow cable, and two output lines of the induction coil 8 penetrate through the middle shell 12 to be connected to the circuit board 2 to provide power for the device. The width of the soft magnetic alloy strip 3 is 9-11 mm, and the thickness is 0.1-0.3 mm. The soft magnetic alloy strips 3 and the induction coils 8 are used for magnetic field energy collection.
One end of the output wire of the Rogowski coil 4 is fixed on the middle shell 12, and the other end of the output wire of the Rogowski coil 4 is detachably connected with the middle shell 12 to form an opening form so as to be conveniently installed on a measured object. Two output wires of the Rogowski coil 4 penetrate through the middle shell 12 from the side surface and are respectively welded on the circuit board 2 for current induction measurement. The output line of the Rogowski coil 4 is electrically connected with the circuit board 2 through a spring pin or an earphone hole. The rogowski coil 4 is fixed to the middle case 12 for measuring current.
The device also comprises a high-temperature cable tie 6, wherein the high-temperature cable tie 6 is fixed between the middle shell 12 and the lower shell 13, and the high-temperature cable tie 6 penetrates through the shell 1 to fix the device and an object to be measured so as to prevent sliding.
The soft magnetic alloy shell is characterized by further comprising a silica gel sleeve 5, the silica gel sleeve 5 is sleeved outside the soft magnetic alloy strip 3 and the Rogowski coil 4, the Rogowski coil 4 and the soft magnetic alloy strip 3 exposed outside the shell 1 are arranged on the silica gel sleeve 5 to form a whole, and the effects of insulation and attractiveness are achieved.
The utility model adopts the soft magnetic alloy strip 3 to replace an electromagnetic current transformer, and the soft magnetic alloy strip 3 takes electricity, and has the advantages that the initial magnetic permeability is high as shown in figure 3, the open-circuit voltage of the coil can reach the peak value of 0.96V at 1A, and the waveform is distorted at the moment, which indicates that the soft magnetic alloy works in a non-linear region. At a large current, as shown in fig. 4, 5, and 6, although the open circuit voltage amplitude is increased greatly, the Root Mean Square (RMS) voltage is not increased much, as shown in table 1. As can be seen from fig. 7, when the current is small, the current increases, the rms voltage increases rapidly, and when the current reaches a certain level, the rms voltage output changes very little and slowly tends to be stable, which makes the current larger again, the devices in the circuit are not easy to heat, and the circuit processing is simple.
TABLE 1 open-circuit voltage output RMS values of coils at different currents
The Rogowski coil 4 is adopted to replace an electromagnetic current transformer to measure the current, the advantage is also obvious, a silicon steel magnetic core is adopted for magnetic concentration of the general electromagnetic transformer, the silicon steel is in magnetic saturation and high-current heating, the contact surface of the opening design can be processed badly to influence the measurement precision, and the risk of rusting exists even if the processing is proper for a long time, so that the contact is poor and the precision is influenced. The Rogowski coil 4 does not contain ferromagnetic materials, has no hysteresis effect and has almost zero phase error; there is no magnetic saturation, so the measuring range can be from several amperes to hundreds of kiloamperes of current, the structure is simple, the measuring accuracy will not change with time.
The electromagnetic current transformer is limited by the size of the measured object, and the universality is not strong in different sizes. The structure designed by the utility model can solve the defect. The utility model adopts the high-temperature binding belt 6 for fixation, and the output line of the Rogowski coil 4 can be connected to the circuit board 2 through the elastic needle or the earphone hole, etc., thereby being convenient for replacing the Rogowski coil 4, and aiming at the main shell of the measured object with different sizes, the main shell does not need to be changed, and the Rogowski coil 4 and the soft magnetic alloy belt 3 with different lengths can meet various field applications. The Rogowski coil 4 and the soft magnetic alloy strip 3 are both made of soft materials and can be installed in different shapes of objects to be measured.
The utility model has simple circuit but complete functions, can not only get electricity through the soft magnetic alloy strip 3, but also leave a spare rechargeable battery, not only supplies power to the system when the object to be measured flows through, but also charges the spare battery with redundant energy, and can still work for more than half a year when the object to be measured does not pass current under the full-charge condition. Fig. 8 shows a block diagram of the internal circuit connection of the present apparatus. Energy is collected through the soft magnetic alloy strip 3 and the induction coil 8, the power management circuit manages the collected energy and provides the energy for the rechargeable battery, power switching is carried out through the power switching circuit, power is provided for the main control and wireless communication module to supply power, the Rogowski coil 4 carries out current measurement and sends the current measurement to the main control and wireless communication module through the integrating circuit and the signal processing circuit, and temperature detection data is also sent to the main control and wireless communication module to be processed.
The utility model has low cost, the size of the soft magnetic alloy strip 3 only needs 10mm wide and 0.2mm thick, the length is determined according to the diameter of the actual measured object, and compared with silicon steel, the utility model uses less material. The field application is simple, and the device is suitable for measured objects with different specifications and sizes. The circuit is realized simply, and without excessive protection devices, the main housing 1 can be miniaturized so as to be installed in a narrow space.
The foregoing is merely a preferred embodiment of the utility model and is not intended to limit the utility model in any manner; those skilled in the art can readily practice the utility model as shown and described in the drawings and detailed description herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the utility model as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a cable load current induction gets ability and measuring wireless device which characterized in that: including casing, circuit board, rogowski coil, soft magnetic alloy area, induction coil, temperature probe, the circuit board induction coil arranges in the casing, induction coil's output line the output line of rogowski coil temperature probe with the circuit board electricity is connected, soft magnetic alloy area passes induction coil, the one end and the other end in soft magnetic alloy area can be dismantled and be connected to form closed loop, the one end and the other end of the output line of rogowski coil can be dismantled and be connected.
2. The wireless device for cable load current induction energy taking and measurement as claimed in claim 1, wherein: the shell comprises an upper shell, a middle shell and a lower shell, the circuit board and the induction coil are arranged in the middle shell, and the middle shell, the circuit board and the induction coil are assembled together through the upper shell and the lower shell.
3. The wireless device for cable load current induction energy taking and measurement as claimed in claim 2, wherein: the middle shell is provided with a through hole, and the soft magnetic alloy strip penetrates through the induction coil through the through hole.
4. A cable load current sensing, energy harvesting and measuring wireless device as defined in claim 3, wherein: the soft magnetic alloy belt is characterized by further comprising a fixing buckle, wherein a mounting hole is formed in the upper shell, and the fixing buckle penetrates through the mounting hole to fix one end and the other end of the soft magnetic alloy belt.
5. The wireless device for cable load current induction energy taking and measurement as claimed in claim 2, wherein: one end of an output line of the Rogowski coil is fixed on the middle shell, and the other end of the output line of the Rogowski coil is detachably connected with the middle shell.
6. The wireless device for cable load current induction energy taking and measurement as claimed in claim 2, wherein: the circuit board is arranged on one side, facing the upper shell, of the middle shell, and the induction coil is arranged on one side, facing the lower shell, of the middle shell.
7. The wireless device for cable load current induction energy extraction and measurement as claimed in claim 6, wherein: the high-temperature binding belt is fixed between the middle shell and the lower shell.
8. The wireless device for cable load current induction energy taking and measurement as claimed in claim 1, wherein: still include the silica gel cover, the silica gel cover is established soft magnetic alloy area with outside the Rogowski coil.
9. The wireless device for cable load current induction energy taking and measurement as claimed in claim 1, wherein: and the output line of the Rogowski coil is electrically connected with the circuit board through a spring pin or an earphone hole.
10. The wireless device for cable load current induction energy taking and measurement as claimed in claim 1, wherein: the width of the soft magnetic alloy strip is 9-11 mm, and the thickness of the soft magnetic alloy strip is 0.1-0.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122310801.6U CN216560723U (en) | 2021-09-23 | 2021-09-23 | Wireless device for cable load current induction energy taking and measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122310801.6U CN216560723U (en) | 2021-09-23 | 2021-09-23 | Wireless device for cable load current induction energy taking and measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216560723U true CN216560723U (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122310801.6U Active CN216560723U (en) | 2021-09-23 | 2021-09-23 | Wireless device for cable load current induction energy taking and measurement |
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|---|---|
| CN (1) | CN216560723U (en) |
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2021
- 2021-09-23 CN CN202122310801.6U patent/CN216560723U/en active Active
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