Radio current sensor

Abstract

The utility model discloses a wireless current sensor relates to sensor and communication technical field. Wireless current sensor includes casing, annular core, electric signal processing subassembly and wireless communication subassembly, and the casing forms annular channel, and the annular core is located at the casing, and the axis of annular core coincides with the axis of annular channel, and the outer periphery of annular core is wound with induction coil, and the electric signal processing subassembly is located at the casing and is electrically connected with induction coil, and the wireless communication subassembly is located at the casing and is electrically connected with electric signal processing subassembly, and the positioning assembly is movably arranged on the side of casing, and the positioning assembly forms the positioning channel, and the wire penetrates the positioning channel and the inner periphery of positioning channel and the outer periphery of wire are completely attached, and the axis of positioning channel and the axis of annular channel coincide, so that the wire and the axis of annular channel coincide. The utility model provides technical scheme to improve the detection accuracy of wireless current sensor.

Description

Technical Field

[0001] This utility model relates to the field of sensor and communication technology, and in particular to a wireless current sensor. Background Technology

[0002] With the continuous development of wireless communication and sensor technologies, current sensors have gradually become an important development direction in the field of current detection. Current sensors combine a current transformer and communication components, converting a large primary current into a small secondary current through the principle of electromagnetic induction, and using communication technology to transmit the detection data. This design not only improves the flexibility of measurement but also reduces the complexity and cost of wiring.

[0003] Existing current sensors typically use a wire that passes directly through the center of its core to detect current. However, this method is prone to errors due to installation or space constraints, which can cause the wire to deviate from the central axis of the core, resulting in an uneven magnetic field distribution and affecting measurement accuracy and reliability. Utility Model Content

[0004] The main objective of this invention is to propose a wireless current sensor, which aims to improve the detection accuracy of wireless current sensors.

[0005] To achieve the above objectives, the present invention proposes a wireless current sensor, comprising:

[0006] The shell has an annular channel;

[0007] An annular iron core is disposed in the housing, the axis of the annular iron core coincides with the axis of the annular channel, and an induction coil is wound around the outer periphery of the annular iron core;

[0008] An electrical signal processing component is disposed in the housing and electrically connected to the induction coil;

[0009] A wireless communication component, disposed in the housing and electrically connected to the electrical signal processing component; and

[0010] A positioning component is movably disposed on the side of the housing. The positioning component forms a positioning channel. A wire passes through the positioning channel and the inner circumference of the positioning channel is completely in contact with the outer circumference of the wire. The axis of the positioning channel coincides with the axis of the annular channel, so that the wire coincides with the axis of the annular channel.

[0011] In one embodiment, the positioning component includes at least two positioning units, one end of each of the at least two positioning units is movably disposed on the side of the housing, and the other ends of the at least two positioning units are close to each other and cooperate to form the positioning channel.

[0012] In one embodiment, each of the positioning units includes:

[0013] A rotating component, one end of which is rotatably connected to the housing, and the other end of which extends toward the axis of the annular channel and is provided with an arc-shaped clamping portion; and

[0014] A limiting member is provided between the housing and the rotating member to limit the rotation angle of the rotating member;

[0015] In this configuration, at least two of the arc-shaped clamping portions of at least two of the positioning units are brought close together to form the positioning channel.

[0016] In one embodiment, the limiting member includes:

[0017] A fixed base is provided on the housing, the fixed base having an annular groove, and one end of the rotating member is rotatably sleeved on the outer periphery of the fixed base and covering the opening of the annular groove; and

[0018] An arc-shaped elastic element is disposed in and conforms to the annular groove. One end of the arc-shaped elastic element away from the annular channel is fixed to the annular groove, and the other end of the arc-shaped elastic element near the annular channel is connected to the rotating member to drive the arc-shaped clamping part close to the axis of the annular channel.

[0019] In one embodiment, the rotating member includes:

[0020] A turntable, rotatably fitted around the outer periphery of the fixed base and covering the opening of the annular groove, has a connecting block on the side of the turntable facing the annular groove, the connecting block extending into the annular groove and connecting to the end of the arc-shaped elastic element; and

[0021] A support rod is provided on the side of the turntable, and the arc-shaped clamping part is provided at the end of the support rod away from the turntable.

[0022] In one embodiment, the rotating member is provided with an arc-shaped guide groove, the fixed base is provided with a guide shaft, the guide shaft passes through the guide groove, and the arc-shaped guide groove is movable relative to the guide shaft.

[0023] In one embodiment, a heat-conducting plate is provided inside the housing, the heat-conducting plate being disposed close to the annular iron core and / or the wireless communication component and / or the electrical signal processing component; and / or

[0024] The shell has a closed channel filled with paraffin wax.

[0025] In one embodiment, the wireless current sensor further includes:

[0026] A temperature sensing element is disposed in the housing and electrically connected to the electrical signal processing component, wherein the detection probe of the temperature sensing element extends into the annular channel.

[0027] In one embodiment, the detection probe is telescopically oriented to be closer to or further away from the axis of the annular channel.

[0028] In one embodiment, the housing includes a first outer shell and a second outer shell that are detachably connected, and the annular iron core includes two semi-annular iron cores, which are respectively disposed on the first outer shell and the second outer shell, and the ends of the two semi-annular iron cores are respectively exposed on the first outer shell and the second outer shell to abut against each other.

[0029] The technical solution of this utility model involves incorporating a housing, a toroidal iron core, an electrical signal processing component, and a wireless communication component within a wireless current sensor. The housing forms an annular channel; the toroidal iron core is housed within the housing, its axis coinciding with the axis of the annular channel, and an induction coil is wound around its outer circumference; the electrical signal processing component is located within the housing and electrically connected to the induction coil; the wireless communication component is also located within the housing and electrically connected to the electrical signal processing component; a positioning component is movably positioned on the side of the housing, forming a positioning channel through which a wire passes, with the inner circumference of the positioning channel completely fitting against the outer circumference of the wire. The axis of the positioning channel coincides with the axis of the annular channel, ensuring that the wire and the axis of the annular channel are aligned. Compared to existing current sensors that directly pass a wire through the center of the iron core, this utility model's technical solution incorporates a positioning component. The positioning channel formed by the positioning component positions the wire, ensuring that the wire coincides with the axis of the toroidal iron core. This guarantees that the induction coil can sense a stable and accurate voltage signal, improving the detection accuracy of the wireless current sensor. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 A schematic diagram of an embodiment of the wireless current sensor provided by this utility model;

[0032] Figure 2 for Figure 1 A cross-sectional view of one embodiment;

[0033] Figure 3 for Figure 1 A schematic diagram of another embodiment;

[0034] Figure 4 for Figure 1 An exploded view of one embodiment of the positioning component.

[0035] Explanation of icon numbers:

[0036] 100. Housing; 110. First outer shell; 120. Second outer shell; 130. Annular channel;

[0037] 200. Toroidal core; 210. Semi-toroidal core;

[0038] 300, Positioning unit; 310, Fixing base; 311, Annular groove; 312, Fixing plate; 313, Guide shaft; 320, Arc-shaped elastic element; 330, Turntable; 331, Connecting block; 332, Arc-shaped guide groove; 340, Support rod; 350, Arc-shaped clamping part; 361, Fixing shaft; 362, Baffle; 370, Positioning channel;

[0039] 400. Temperature sensing element; 410. Probe body; 420. Support sleeve;

[0040] 510. Closed channel; 521. First heat-conducting plate; 522. Second heat-conducting plate;

[0041] 610. Electrical signal processing component; 620. Wireless communication component; 630. Power supply module.

[0042] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0044] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0045] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] With the continuous development of wireless communication and sensor technologies, current sensors have gradually become an important development direction in the field of current detection. Current sensors combine a current transformer and communication components, converting a large primary current into a small secondary current through the principle of electromagnetic induction, and using communication technology to transmit the detection data. This design not only improves the flexibility of measurement but also reduces the complexity and cost of wiring.

[0047] Existing current sensors typically use a wire that passes directly through the center of its core to detect current. However, this method is prone to errors due to installation or space constraints, which can cause the wire to deviate from the central axis of the core, resulting in an uneven magnetic field distribution and affecting measurement accuracy and reliability.

[0048] This invention proposes a wireless current sensor to improve the detection accuracy of wireless current sensors.

[0049] Please see Figure 1 and Figure 2 In one embodiment, the wireless current sensor includes a housing 100, a toroidal core 200, an electrical signal processing component 610, a wireless communication component 620, and a positioning component. The housing 100 forms an annular channel 130. The toroidal core 200 is disposed in the housing 100, and the axis of the toroidal core 200 coincides with the axis of the annular channel 130. An induction coil (not shown) is wound around the outer periphery of the toroidal core 200. The electrical signal processing component 610 is disposed in the housing 100 and electrically connected to the induction coil. The wireless communication component 620 is disposed in the housing 100 and electrically connected to the electrical signal processing component 610. The positioning component is movably disposed on the side of the housing 100 and forms a positioning channel 370. A wire passes through the positioning channel 370, and the inner periphery of the positioning channel 370 is completely fitted with the outer periphery of the wire. The axis of the positioning channel 370 coincides with the axis of the annular channel 130, so that the axis of the wire coincides with the axis of the annular channel 130.

[0050] The housing 100 provides support and external protection for the wireless current sensor. An annular channel 130 is located in the middle of the housing 100 for placing the wire. An annular iron core 200 is used to concentrate and guide the magnetic field generated by the wire to the induction coil. In one embodiment, an annular mounting groove is provided inside the housing 100, the axis of which coincides with the axis of the annular channel 130. Both the annular iron core 200 and the induction coil are located in the annular mounting groove, with the induction coil wound around the outer circumference of the annular iron core 200. The size of the annular mounting groove is adapted to the size of the annular iron core 200 so that the axis of the annular iron core 200 coincides with the axis of the annular channel 130. When the wire passes through the annular channel 130, the current in the wire generates a magnetic field. The annular iron core 200 amplifies this magnetic field and guides it around the induction coil. The induction coil induces a voltage proportional to the current in the wire. By measuring the induced voltage, the current in the wire can be detected.

[0051] An electrical signal processing component 610 is used to receive and measure the induced voltage. In one embodiment, the electrical signal processing component 610 is disposed within a housing 100 and located on one side of the toroidal core 200. The electrical signal processing component 610 includes a preamplifier, a filter, an analog-to-digital converter (ADC), and a microcontroller. The two ends of the induction coil are connected to the input of the preamplifier, which amplifies the voltage signal generated by the induction coil. The output of the preamplifier is connected to the input of the filter, which filters the amplified signal to remove noise and interference. The output of the filter is connected to the input of the ADC, which converts the voltage signal into a digital signal. The output of the ADC is connected to the input of the microcontroller, which further processes and analyzes the digital signal to obtain the current value of the conductor.

[0052] The wireless communication component 620 is used to transmit the signal processed by the electrical signal processing component 610 to an external device. In one embodiment, the wireless communication component 620 is disposed within the housing 100 and located on one side of the toroidal iron core 200. The wireless communication component 620 includes an interface, a wireless communication module, and an antenna. The input terminal of the wireless communication module is connected to the output terminal of the microcontroller through the interface, and the microcontroller transmits the processed digital signal to the wireless communication module. The output terminal of the wireless communication module is connected to the antenna, and the wireless communication module converts the digital signal into a wireless signal and transmits it to the antenna. The antenna can receive and transmit wireless signals to achieve wireless communication with external devices. The wireless communication module can be a Wi-Fi module or a Bluetooth module, etc., and is not limited thereto. In one embodiment, the charging device also includes a power supply module 630 to provide a stable power supply for the electrical signal processing component 610 and the wireless communication component 620.

[0053] The positioning component is used to position the conductor so that it is located on the axis of the toroidal core 200. In one embodiment, one end of the positioning component is movably disposed on the housing, and the other end of the positioning component extends toward the axis of the annular channel 130 and forms a positioning channel 370 to limit the conductor. In another embodiment, one end of the positioning component is rotatably disposed on the housing so that the other end of the positioning component can approach or move away from the axis of the annular channel 130, facilitating the positioning of the conductor after it has passed through the annular channel 130.

[0054] The technical solution of this utility model involves assembling a housing 100, a ring-shaped iron core 200, an electrical signal processing component 610, and a wireless communication component 620 within a wireless current sensor. The housing 100 forms an annular channel 130. The ring-shaped iron core 200 is disposed within the housing 100, with its axis coinciding with the axis of the annular channel 130. An induction coil is wound around the outer periphery of the ring-shaped iron core 200. The electrical signal processing component 610 is disposed within the housing 100 and electrically connected to the induction coil. The wireless communication component 620 is disposed within the housing 100 and electrically connected to the electrical signal processing component 610. A positioning component is movably disposed on the side of the housing 100, forming a positioning channel 370. A wire passes through the positioning channel 370, with the inner periphery of the positioning channel 370 completely fitting against the outer periphery of the wire. The axis of the positioning channel 370 coincides with the axis of the annular channel 130, ensuring that the axis of the wire coincides with the axis of the annular channel 130. Compared to existing current sensors that directly pass the wire through the center of the iron core, the technical solution of this utility model is equipped with a positioning component. The positioning channel 370 formed by the positioning component positions the wire so that the axis of the wire coincides with the axis of the annular iron core 200, ensuring that the induction coil can sense a stable and accurate voltage signal, thereby improving the detection accuracy of the wireless current sensor.

[0055] Please see Figures 1 to 3 In one embodiment, the positioning component includes at least two positioning units 300, one end of each positioning unit 300 is movably disposed on the side of the housing 100, and the other ends of each positioning unit 300 are close to each other and cooperate to form a positioning channel 370.

[0056] In one embodiment, two positioning units 300 are respectively provided at opposite ends of the annular channel 130. The two positioning units 300 located at the same end are symmetrically arranged on opposite sides of the annular channel 130. One end of the two positioning units 300 at the same end can be brought close together to form a positioning channel 370. The axes of all positioning channels 370 coincide with the annular channel 130. Any two positioning channels 370 located at different ends are situated on opposite sides of the annular channel 130, and their extending directions intersect or are opposite, to provide more stable positioning for the conductor. Of course, in other embodiments, only two or more positioning units 300 may be provided; this is not limited here.

[0057] Please see Figure 3 and Figure 4 In one embodiment, each positioning unit 300 includes a rotating member and a limiting member. One end of the rotating member is rotatably connected to the housing 100, and the other end of the rotating member extends toward the axis of the annular channel 130 and is provided with an arc-shaped clamping part 350. The limiting member is disposed between the housing 100 and the rotating member to limit the rotation angle of the rotating member. At least two arc-shaped clamping parts 350 of at least two positioning units 300 are close to each other to form a positioning channel 370.

[0058] In one embodiment, the arc-shaped clamping portions 350 of two positioning units 300 located on the same side are arranged opposite each other to form an annular positioning channel 370. The size of the arc-shaped clamping portions 350 can be flexibly set according to actual needs and is not limited here. In one embodiment, the arc-shaped clamping portions 350 are configured with a flexible material such as silicone or rubber to avoid wear on the outer peripheral surface of the wire. Of course, in other embodiments, the arc-shaped clamping portions 350 may also be configured with a material such as plastic, and is not limited here.

[0059] In the initial state, the two arc-shaped clamping portions 350 of the two positioning units 300 approach each other to form a positioning channel 370. Under the action of external force, the rotating member can rotate relative to the housing 100 to move the arc-shaped clamping portions 350 away from the axis of the annular channel 130, so that the wire can pass through the annular channel 130 and be placed between the two arc-shaped clamping portions 350; after the external force is removed, the rotating member can return to the initial state to clamp the wire and position the wire.

[0060] The technical solution of this utility model embodiment, by setting at least two positioning units 300, each positioning unit 300 including a rotating member and an arc-shaped clamping part 350, enables the at least two positioning units 300 to clamp and position the wire, thereby improving the stability of positioning. Furthermore, the rotating member is rotatably configured to rotate through the annular channel 130 to avoid obstructing the wire, and to rotate again after the wire is placed to position it, thus improving the ease of use of the wireless current sensor.

[0061] Please see Figure 3 and Figure 4 In one embodiment, the limiting member includes a fixed base 310 and an arc-shaped elastic member 320. The fixed base 310 is disposed on the housing 100 and has an annular groove 311. One end of the rotating member is rotatably sleeved on the outer periphery of the fixed base 310 and covers the opening of the annular groove 311. The arc-shaped elastic member 320 is disposed in the annular groove 311 and fits against the annular groove 311. The end of the arc-shaped elastic member 320 away from the annular channel 130 is fixed to the annular groove 311, and the end of the arc-shaped elastic member 320 close to the annular channel 130 is connected to the rotating member to drive the arc-shaped clamping part 350 close to the axis of the annular channel 130.

[0062] In one embodiment, a fixing seat 310 is disposed on the side of the housing 100. An annular groove 311 is provided on the side of the fixing seat 310 facing away from the housing 100. An arc-shaped elastic member 320 extends around the axis of the annular groove 311 and is disposed against the bottom of the annular groove 311. In another embodiment, a fixing plate 312 is provided within the annular groove 311. One end of the arc-shaped elastic member 320 away from the annular channel 130 is fixed to the fixing plate 312. The side of the rotating member facing the annular groove 311 is connected to the end of the arc-shaped elastic member 320 near the annular channel 130. The two arc-shaped elastic members 320 of the two positioning units 300 drive the two arc-shaped clamping portions 350 to move closer together to form a positioning channel 370. Considering that the placement of the housing 100 will cause the wire to exert different pressures on the positioning units 300 at different positions, the positioning units 300 at different positions are equipped with arc-shaped elastic elements 320 with different elastic moduli, so that the arc-shaped clamping part 350 positions the wire along the axis of the annular channel 130 when clamping it. The arc-shaped elastic element 320 can be configured as a spring, silicone, or a multi-pore elastomer, etc., and the specific elastic modulus of the arc-shaped elastic element 320 can be flexibly set according to the actual application, without limitation here.

[0063] When the rotating member rotates relative to the housing 100 under the action of external force, so that the arc-shaped clamping part 350 moves away from the axis of the annular channel 130, the arc-shaped elastic member 320 will be compressed; after the external force is removed, the rotating member can return to the initial state under the elastic force of the arc-shaped elastic member 320.

[0064] Please see Figure 3 and Figure 4 In one embodiment, the rotating component includes a turntable 330 and a support rod 340. The turntable 330 is rotatably sleeved on the outer periphery of the fixed base 310 and covers the opening of the annular groove 311. A connecting block 331 is provided on the side of the turntable 330 facing the annular groove 311. The connecting block 331 extends to the annular groove 311 and is connected to the end of the arc-shaped elastic member 320. The support rod 340 is provided on the side of the turntable 330, and an arc-shaped clamping part 350 is provided at the end of the support rod 340 away from the turntable 330.

[0065] In one embodiment, the fixing base 310 is configured as a circular structure, with a fixing shaft 361 at its center. The fixing shaft 361 passes through the turntable 330, and a baffle 362 is provided at one end of the fixing shaft 361 exposed on the turntable 330 to block the turntable 330 and prevent it from detaching from the fixing base 310. In another embodiment, the outer periphery of the fixing base 310 is provided with a sliding groove, and the inner periphery of the turntable 330 is provided with a slider that slides into the sliding groove. In one embodiment, a connecting block 331 protrudes from the side of the turntable 330 facing the annular groove 311, extends into the annular groove 311, and its side is connected to the end of the arc-shaped elastic member 320. In one embodiment, one end of the support rod 340 is fixed to the side of the turntable 330, and the other end of the support rod 340 extends toward the annular channel 130. The side of the arc-shaped clamping part 350 opposite to the axis of the annular channel 130 is connected to the support rod 340. In one embodiment, the cross-sectional dimension of the end of the support rod 340 near the turntable 330 is larger than the cross-sectional dimension of the end of the support rod 340 away from the turntable 330, so as to ensure the structural stability of the support rod 340.

[0066] When the turntable 330 rotates relative to the housing 100 under the action of external force, causing the support rod 340 to drive the arc-shaped clamping part 350 away from the axis of the annular channel 130, the rotation of the connecting block 331 will compress the arc-shaped elastic element 320; after the external force is removed, under the elastic force of the arc-shaped elastic element 320, the connecting block 331 rotates to drive the turntable 330 and the support rod 340 back to their initial state.

[0067] The technical solution of this utility model embodiment, by setting an arc-shaped elastic element 320, allows the two arc-shaped clamping parts 350 to approach each other to clamp the wire, thereby improving the positioning stability; the arc-shaped elastic element 320 allows the turntable 330 to rotate relative to the fixed base 310, realizing the rotation and automatic return of the turntable 330, and can adapt to wires of different sizes, improving the positioning reliability and flexibility of the positioning component, thereby improving the detection accuracy and ease of use of the wireless current sensor.

[0068] Please see Figure 3 and Figure 4 In one embodiment, the rotating member is provided with an arc-shaped guide groove 332, and the fixed base 310 is provided with a guide shaft 313. The guide shaft 313 passes through the guide groove, and the arc-shaped guide groove 332 can move relative to the guide shaft 313.

[0069] In one embodiment, the turntable 330 is provided with an arc-shaped guide groove 332, which is located on one side of the connecting block 331. When the turntable 330 rotates, the arc-shaped guide groove 332 can move relative to the guide shaft 313, and the two ends of the arc-shaped guide groove 332 can abut against the guide shaft 313 to further limit the rotation angle of the turntable 330.

[0070] In the initial state, the two arc-shaped clamping portions 350 of the two positioning units 300 approach each other to form a positioning channel 370. At this time, the end of the arc-shaped guide groove 332 abuts against the guide shaft 313 to restrict the rotation of the turntable 330. Under the action of external force, when the turntable 330 rotates relative to the housing 100 to drive the arc-shaped clamping portion 350 away from the axis of the annular channel 130, the arc-shaped guide groove 332 moves relative to the guide shaft 313 in a first direction. After the external force is removed, under the elastic force of the arc-shaped elastic element 320, the arc-shaped guide groove 332 moves relative to the guide shaft 313 in a second direction, and the connecting block 331 rotates to drive the turntable 330 and the support rod 340 back to the initial state. The first and second directions are opposite and are not restricted here.

[0071] The technical solution of this utility model embodiment, by setting the arc-shaped guide groove 332 and the guide shaft 313, can further limit the rotation angle of the turntable 330 while guiding the rotation of the turntable 330, thereby improving the reliability of the positioning component.

[0072] Please see Figure 2 In one embodiment, the housing 100 is provided with a heat-conducting sheet inside, which is located near the annular iron core 200 and / or the wireless communication component 620 and / or the electrical signal processing component 610; and / or the housing 100 is provided with a closed channel 510, which is filled with paraffin wax.

[0073] During the use of the wireless current sensor, the toroidal core 200, the wireless communication component 620, and the electrical signal processing component 610 all generate heat, which can be dissipated by the heat-conducting sheet and paraffin wax.

[0074] In one embodiment, two sets of heat-conducting sheets are provided, embedded within the housing 100. The two sets of heat-conducting sheets are located on the sides of the electrical signal processing component 610 and the wireless communication component 620, respectively, and are also positioned close to the annular iron core 200. In one embodiment, each set of heat-conducting sheets includes two first heat-conducting sheets 521 and one second heat-conducting sheet 522. The second heat-conducting sheet 522 is positioned close to the outer surface of the housing 100. One end of one of the first heat-conducting sheets 521 is positioned close to the annular iron core 200, and the other end is connected to the second heat-conducting sheet 522. One end of the other first heat-conducting sheet 521 is located at the bottom of the wireless communication component 620 or the electrical signal processing component 610 and close to the bottom plate of the housing 100, and the other end is connected to the second heat-conducting sheet 522. Two first heat-conducting sheets 521 can conduct heat generated by the wireless communication component 620 and the electrical signal processing component 610 to the second heat-conducting sheet 522, which can then transfer heat to the outer surface of the housing 100 for heat exchange with the outside air. Both the first and second heat-conducting sheets 521 and 522 can be configured as graphite sheets, thermally conductive ceramics, or thermally conductive silicone, etc., without limitation. Of course, in other embodiments, only one first heat-conducting sheet 521 may be provided, located only near the annular iron core 200, the wireless communication component 620, or the electrical signal processing component 610; or multiple first heat-conducting sheets 521 may be provided, without limitation.

[0075] In one embodiment, the closed channel 510 is configured as an arc-shaped structure and located near the annular iron core 200. The closed channel 510 is filled with a coolant, which is paraffin wax. Of course, in other embodiments, the closed channel 510 may also be configured as a straight structure, located near the wireless communication component 620 or the electrical signal processing component 610; this is not a limitation. When the temperature of the housing 100 rises, the paraffin wax absorbs the heat of the housing 100 and gradually changes from a solid to a liquid state; when the temperature of the housing 100 decreases, the paraffin wax releases heat to the external environment and gradually changes from a liquid to a solid state, thus keeping the temperature of the housing 100 relatively stable. Of course, in other embodiments, the closed channel 510 may also be filled with a paraffin wax and expanded graphite composite material or a eutectic mixture of nitrates and potassium nitrates, etc.; this is not a limitation.

[0076] In one embodiment, the closed channel 510 and the heat-conducting plate are located on opposite sides of the annular iron core 200 to provide comprehensive heat dissipation for the wireless current sensor and to make the temperature of the housing 100 more uniform, thus avoiding localized overheating. Of course, in other embodiments, only the closed channel 510 filled with paraffin or the heat-conducting plate may be provided; this is not a limitation.

[0077] The technical solution of this utility model embodiment can conduct heat dissipation of the wireless current sensor by setting a heat-conducting sheet, thereby reducing the accumulation of heat inside the housing 100 and improving its service life; by setting paraffin wax, the phase change process of paraffin wax can be used to absorb and dissipate heat, so that the temperature of the wireless current sensor remains relatively stable, thereby enabling the wireless current sensor to adapt to different environments and improving the adaptability of the wireless current sensor.

[0078] Please see Figure 1 and Figure 2 In one embodiment, the wireless current sensor further includes a temperature detection element 400 disposed in the housing 100 and electrically connected to the electrical signal processing component 610, wherein the detection probe of the temperature detection element 400 extends to the annular channel 130.

[0079] In one embodiment, the temperature detection element 400 includes a temperature sensor and a detection probe. The detection probe is electrically connected to the temperature sensor, and the temperature sensor is electrically connected to an electrical signal processing component 610 to transmit the temperature signal detected by the detection probe to the electrical signal processing component 610. The temperature sensor can be configured as a thermocouple, a semiconductor temperature sensor, or an infrared temperature sensor, etc., without limitation. When the temperature sensor is configured as a thermocouple or a semiconductor temperature sensor, the detection probe needs to be in contact with a wire to achieve temperature detection. When the temperature sensor is configured as an infrared temperature sensor, the detection probe only needs to be near the wire, rather than necessarily in contact with it.

[0080] In one embodiment, the detection probe is telescopically oriented to move closer to or further away from the axis of the annular channel 130. Specifically, in one embodiment, the detection probe includes a probe body 410, a support sleeve 420, and a linear elastic element. A temperature sensor is disposed within the probe body 410 and electrically connected to it. The support sleeve 420 is disposed within the housing 100 and extends into the annular channel 130. The support sleeve 420 is slidably fitted around the outer periphery of the probe body 410, allowing the probe body 410 to slide within the support sleeve 420. The linear elastic element is disposed within the support sleeve 420 and abuts against the probe body 410, causing the probe body 410 to tend to move away from the support sleeve 420. The linear elastic element can be configured as a spring or a silicone elastomer, etc., and is not limited thereto. Under the action of external force, the probe body 410 moves along the support sleeve 420 in a direction away from the axis of the annular channel 130 to compress the linear elastic element; after the external force is removed, under the action of the elastic force of the linear elastic element, the probe body 410 moves along the support sleeve 420 in a direction closer to the axis of the annular channel 130.

[0081] In one embodiment, the end of the support sleeve 420 is exposed outside the annular channel 130. In another embodiment, the support sleeve 420 is completely disposed inside the housing 100, and the side wall of the annular channel 130 is provided with a through hole communicating with the support sleeve 420. The probe body 410 extends into the annular channel 130 through the through hole, so that when the linear elastic element is compressed to its maximum extent, the top of the probe body 410 is flush with the side wall of the annular channel 130. Of course, in other embodiments, the probe body 410 can also be threadedly connected to the support sleeve 420 to adjust the height of the probe body 410 through the thread; this is not limited here.

[0082] The technical solution of this embodiment of the invention, by setting a temperature detection element 400, enables the simultaneous detection of the current and temperature of the wire, thereby expanding the application range of the wireless current sensor. By making the detection probe retractable, the extension length can be adjusted according to the size of the wire, improving its flexibility of use.

[0083] Please see Figure 2 and Figure 3 In one embodiment, the housing 100 includes a first outer shell 110 and a second outer shell 120 that are detachably connected, and the annular iron core 200 includes two semi-annular iron cores 210, which are respectively disposed on the first outer shell 110 and the second outer shell 120, and the ends of the two semi-annular iron cores 210 are respectively exposed outside the first outer shell 110 and the second outer shell 120 to abut against each other.

[0084] In one embodiment, one end of the first outer shell 110 is rotatably connected to one end of the second outer shell 120, and the other end of the first outer shell 110 is detachably connected to the other end of the second outer shell 120, allowing the first outer shell 110 and the second outer shell 120 to be opened and closed. The detachable connection between the first outer shell 110 and the second outer shell 120 can be achieved using bolts or clips, etc., and is not limited in this respect. In one embodiment, both the electrical signal processing component 610 and the wireless communication component 620 are disposed on the second outer shell 120 and located at the bottom of the semi-annular iron core 210. A positioning unit 300 is provided on each of the opposite sides of the first outer shell 110 and the opposite sides of the second outer shell 120. Two arc-shaped clamping portions 350 of the two positioning units 300, located on the same side of the housing 100 and respectively on the second outer shell 120 and the first outer shell 110, cooperate to form a positioning channel 370. The first outer shell 110 has a first receiving groove, and the second outer shell 120 has a second receiving groove. Both ends of the first receiving groove and both ends of the second receiving groove are open, and the first and second receiving grooves together form an annular mounting groove. The two semi-ring cores 210 have the same structure and dimensions. When both ends of the first outer shell 110 and the second outer shell 120 are connected, the two ends of the two semi-ring cores 210 abut against each other to form a ring core 200. In one embodiment, a sealing gasket is provided at the contact portion between the first outer shell 110 and the second outer shell 120 to protect the ring core 200.

[0085] In one embodiment, induction coils are wound around two semi-ring cores 210, with one end of each induction coil connected in series and the other end connected to the input terminal of a preamplifier. Specifically, in one embodiment, two first conductive contacts (not shown in the figure) are provided at one opening of the first cavity and at the corresponding opening of the second cavity, respectively, and are electrically connected to the induction contacts; a second conductive contact (not shown in the figure) is provided at the other opening of the first cavity and is electrically connected to the induction coil; a third conductive contact (not shown in the figure) is provided at the corresponding opening of the second cavity and is electrically connected to the input terminal of the preamplifier. When both ends of the first housing 100 and the second housing 100 are connected, the two first conductive contacts touch each other, causing one end of each induction coil to be connected in series; the second conductive contact touches the third conductive contact, causing the induction coil not located in the same housing as the electrical signal processing component 610 to be connected to the input terminal of the preamplifier, while the induction coil located in the same housing as the electrical signal processing component 610 is directly connected to the input terminal of the preamplifier. Of course, in other embodiments, the induction coil may be located only in one of the cores; this is not a limitation.

[0086] The technical solution of this utility model embodiment, by setting a detachable first outer shell 110 and a second outer shell 120 and a semi-ring iron core 210, ensures that the current of the wire can be detected, while facilitating the installation and removal of the wireless sensor, thereby improving the ease of use of the wireless current sensor.

[0087] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A wireless current sensor, characterized in that, include: The shell has an annular channel; An annular iron core is disposed in the housing, the axis of the annular iron core coincides with the axis of the annular channel, and an induction coil is wound around the outer periphery of the annular iron core; An electrical signal processing component is disposed in the housing and electrically connected to the induction coil; A wireless communication component is disposed in the housing and electrically connected to the electrical signal processing component; as well as A positioning component is movably disposed on the side of the housing. The positioning component forms a positioning channel. A wire passes through the positioning channel and the inner circumference of the positioning channel is completely in contact with the outer circumference of the wire. The axis of the positioning channel coincides with the axis of the annular channel, so that the wire coincides with the axis of the annular channel.

2. The wireless current sensor as described in claim 1, characterized in that, The positioning component includes at least two positioning units, one end of each of the at least two positioning units is movably disposed on the side of the housing, and the other ends of the at least two positioning units are close to each other and cooperate to form the positioning channel.

3. The wireless current sensor as described in claim 2, characterized in that, Each of the positioning units includes: A rotating component, one end of which is rotatably connected to the housing, and the other end of which extends toward the axis of the annular channel and is provided with an arc-shaped clamping portion; and A limiting member is provided between the housing and the rotating member to limit the rotation angle of the rotating member; In this configuration, at least two of the arc-shaped clamping portions of at least two of the positioning units are brought close together to form the positioning channel.

4. The wireless current sensor as described in claim 3, characterized in that, The limiting component includes: A fixed base is provided on the housing, the fixed base having an annular groove, and one end of the rotating member is rotatably sleeved on the outer periphery of the fixed base and covering the opening of the annular groove; and An arc-shaped elastic element is disposed in and conforms to the annular groove. One end of the arc-shaped elastic element away from the annular channel is fixed to the annular groove, and the other end of the arc-shaped elastic element near the annular channel is connected to the rotating member to drive the arc-shaped clamping part close to the axis of the annular channel.

5. The wireless current sensor as described in claim 4, characterized in that, The rotating component includes: A turntable, rotatably fitted around the outer periphery of the fixed base and covering the opening of the annular groove, has a connecting block on the side of the turntable facing the annular groove, the connecting block extending into the annular groove and connecting to the end of the arc-shaped elastic element; and A support rod is provided on the side of the turntable, and the arc-shaped clamping part is provided at the end of the support rod away from the turntable.

6. The wireless current sensor as described in claim 4, characterized in that, The rotating component is provided with an arc-shaped guide groove, and the fixed base is provided with a guide shaft. The guide shaft passes through the guide groove, and the arc-shaped guide groove can move relative to the guide shaft.

7. The wireless current sensor as described in claim 1, characterized in that, The housing is provided with a heat-conducting plate, which is positioned close to the annular iron core and / or the wireless communication component and / or the electrical signal processing component; and / or The shell has a closed channel filled with paraffin wax.

8. The wireless current sensor as described in claim 1, characterized in that, The wireless current sensor also includes: A temperature sensing element is disposed in the housing and electrically connected to the electrical signal processing component, wherein the detection probe of the temperature sensing element extends into the annular channel.

9. The wireless current sensor as described in claim 8, characterized in that, The detection probe is retractable to be positioned close to or away from the axis of the annular channel.

10. The wireless current sensor as claimed in claim 1, characterized in that, The housing includes a first outer shell and a second outer shell that are detachably connected. The annular iron core includes two semi-annular iron cores, which are respectively disposed on the first outer shell and the second outer shell. The ends of the two semi-annular iron cores are respectively exposed on the first outer shell and the second outer shell to abut against each other.

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