Open type perforated alternating current transmitter

Abstract

The utility model relates to an open type perforated alternating current transmitter, which comprises a transmitter main body, the top of the transmitter main body is rotatably matched with a matching cover, the matching cover is detachably matched with the transmitter main body, the transmitter main body is correspondingly provided with a first groove body, and the matching cover forms a through second groove body along the width direction. A first iron core with an opening is arranged in the transmitter main body, a second iron core with an opening is correspondingly arranged in the matching cover, and the first iron core and the second iron core are used for abutting and matching when the matching cover and the transmitter main body are fixedly matched. The open-type perforated alternating current transmitter can allow a cable to directly pass through the sensor mounting aperture, and can finish mounting by matching with opening and closing of the cover, thereby avoiding power-off operation.

Description

Technical Field

[0001] This utility model relates to the field of current transmitter technology, and more specifically, to an open-type perforated AC current transmitter. Background Technology

[0002] A perforated AC current transmitter is an intelligent instrument used for non-contact measurement of AC current. Its core function is to convert a large current in the measured conductor into a standardized low-voltage or low-current signal to meet the needs of accurate current data acquisition in fields such as power system monitoring, industrial automation control, and energy management. This device achieves current sensing through a perforated design, eliminating the need for direct connection to the measured circuit. Instead, it utilizes the principle of electromagnetic induction to form a closed magnetic circuit around the conductor, calculating the current value by detecting changes in magnetic field strength. Its perforated structure allows cables to pass directly through the sensor mounting hole, offering advantages such as flexible installation, high safety, and strong anti-interference capabilities. It is widely used in high-voltage power transmission and distribution, new energy power generation, and smart grid scenarios.

[0003] However, most through-hole AC current transmitters on the market currently use a closed-type installation method, meaning the sensor needs to be fixed to the outer surface of the cable being measured by a mechanical clamping device. During installation, the cable must be de-energized so that it can be threaded through the sensor's central aperture and secured. This power-off operation restricts equipment deployment to the power system's downtime maintenance window, making it difficult to meet the needs of scenarios with extremely high power continuity requirements, such as data centers, medical facilities, and transportation hubs. Utility Model Content

[0004] This invention provides an open-type perforated AC current transmitter that overcomes some or all of the defects of the prior art.

[0005] According to the embodiment of the present utility model, the open-type perforated AC current transmitter includes a transmitter body, a mating cover rotatably fitted on the top of the transmitter body, the mating cover being detachably fitted with the transmitter body, a first groove correspondingly provided at the transmitter body, a second through groove formed along the width direction of the mating cover, a first iron core with an opening provided inside the transmitter body, and a second iron core with an opening correspondingly provided inside the mating cover, the first iron core and the second iron core being used to abut against each other when the mating cover and the transmitter body are fixedly fitted.

[0006] In a preferred embodiment of this utility model, a first mounting cavity and a second mounting cavity are formed sequentially along the height direction inside the transmitter. The first mounting cavity is provided with a circuit board, and the second mounting cavity is used to cooperate with the first iron core.

[0007] In a preferred embodiment of this utility model, external plugs are provided on both sides of the transmitter body along its length, and corresponding connection sockets are provided on both sides of the circuit board. The connection sockets are used to cooperate with the external plugs.

[0008] In a preferred embodiment of this utility model, coils are sleeved at both ends of the first iron core, and the coils are located at both ends of the length direction of the first slot.

[0009] In a preferred embodiment of this utility model, one end of the cover is hinged to the top of the transmitter body along its length, and the other end is provided with a latching tongue. A corresponding limiting body is provided at the transmitter body, and the latching tongue and the limiting body cooperate accordingly.

[0010] In a preferred embodiment of this utility model, a label is provided at the end of the outer shell away from the mating plate.

[0011] In a preferred embodiment of this utility model, mounting grooves are formed at both ends of the transmitter body along its length, and light guide columns are provided in the mounting grooves.

[0012] In a preferred embodiment of this invention, the transmitter body includes a first housing and a second housing that are connected in a mating manner.

[0013] In a preferred embodiment of the present invention, a first locking groove is formed at one end of the first housing near the second housing, and a second locking groove is formed in the second housing accordingly. The transmitter body also includes a locking strip, which is used to engage with the first locking groove and the second locking groove when the first housing and the second housing are connected.

[0014] Beneficial effects:

[0015] The open-type perforated AC current transmitter provided in this embodiment allows the cable to pass directly through the sensor mounting hole, and installation can be completed by opening and closing the cover, avoiding power outage operation.

[0016] Furthermore, the magnetic circuit system formed by the first iron core, the second iron core, and the coil can detect changes in current in real time using the principle of electromagnetic induction, and then output current data through the circuit board.

[0017] In addition, the light guide pillars are integrated at both ends of the housing, which can display the circuit board's operating status in real time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the isometric structure of an open-type perforated AC current transmitter according to at least one embodiment of the present invention.

[0019] Figure 2 This is an exploded structural diagram of the open-type perforated AC current transmitter in at least one embodiment of the present invention.

[0020] Figure 3 This is a circuit diagram of the power supply circuit in at least one embodiment of the present invention;

[0021] Figure 4 This is a circuit diagram of the signal acquisition circuit in at least one embodiment of the present invention;

[0022] Figure 5 This is a circuit diagram of the MCU circuit in at least one embodiment of the present invention;

[0023] Figure 6 This is a circuit diagram of the communication circuit in at least one embodiment of the present invention. Detailed Implementation

[0024] The accompanying drawings in this disclosure are not drawn to scale, and the number of the first iron core 3, the second iron core 4, and the coil 31 are not limited to the quantities shown in the drawings. The specific dimensions and quantities of each structure can be determined according to actual needs. The accompanying drawings described in this disclosure are only structural schematic diagrams.

[0025] Seen in Figure 1-2 This utility model embodiment provides an open-type perforated AC current transmitter. The transmitter body 1 has a rotatable mating cover 2 on its top. The two are rotatably mated by a hinge structure. The mating cover 2 has a latching tongue 24 at the end away from the hinge structure. A limiting body 14 is correspondingly provided at the transmitter body 1. The latching tongue 24 and the limiting body 14 are correspondingly mated. The limiting body 14 is a protrusion on the transmitter body 1, which is used to prevent the latching tongue 24 from loosening when mated with the transmitter body 1.

[0026] Furthermore, the transmitter body 1 is provided with a first iron core 3, and the mating cover 2 is provided with a corresponding second iron core 4. When the mating cover 2 is closed, the two iron cores abut against each other to form a complete magnetic circuit; when the mating cover 2 is open, the cable can be directly passed through the first groove 11, and the open-type perforated AC current transmitter can be installed at the cable to be monitored without power-off operation.

[0027] When using this open-type perforated AC current transmitter, first open the mating cover 2 and place the cable to be tested into the first slot 11. This process does not require power interruption. Then close the mating cover 2, and the first iron core 3 and the second iron core 4 are aligned to form a complete magnetic circuit. The latch tongue 24 and the limiting body 14 are locked. At this time, the cable is limited by the first slot 11 and the second slot 21, realizing the installation of the open-type perforated AC current transmitter at the cable.

[0028] In some embodiments, the transmitter body 1 is divided into a first mounting cavity 12 along the height direction, which is used to accommodate the circuit board 5, and a second mounting cavity 13, which is used to fix the first iron core 3 and the coil 31. The coil 31 is respectively sleeved on both ends of the first iron core 3 and located on both sides of the first groove 11, thereby improving the magnetic field induction efficiency when forming a complete magnetic circuit.

[0029] In some embodiments, the transmitter is provided with external plugs 6 on both sides, which are directly plugged into the sockets on the circuit board 5. The circuit board 5 is electrically connected to the coil 31. When the cable under test passes through the transmitter aperture, the alternating magnetic field generated by the current is captured by the closed magnetic circuit formed by the first iron core 3 and the second iron core 4. The coil 31 generates a voltage signal proportional to the current through electromagnetic induction. The circuit board 5 can obtain the voltage signal input by the coil 31 and convert it into current data of standard analog signal after amplification, filtering and linearization of the voltage signal. The external plugs 6 are connected to the 485 circuit, thereby outputting the current data.

[0030] In some embodiments, the mating cover 2 includes an outer shell 22 with one end open, and a mating plate 23 is detachably provided at the open end of the outer shell 22. The mating plate 23 is used to mate with the second iron core 4.

[0031] In some embodiments, mounting grooves 15 are formed at both ends of the transmitter body 1 along its length, and light guides 7 are provided in the mounting grooves 15. Since the circuit board 5 emits light when it is working, the light guides 7 are used to inform the user of the working status of the circuit board 5.

[0032] In some embodiments, a label 25 is provided at the end of the outer casing 22 away from the mating plate 23, and the label 25 is used to indicate parameters.

[0033] In some embodiments, the transmitter body 1 includes a first housing 16 and a second housing 17 that are mated together. A first locking groove 161 is formed at one end of the first housing 16 near the second housing 17, and a corresponding second locking groove 171 is formed in the second housing 17. The transmitter body 1 also includes a locking strip 18, which is used to engage with the first locking groove 161 and the second locking groove 171 when the first housing 16 and the second housing 17 are mated together, thereby achieving locking when the first housing 16 and the second housing 17 are mated together.

[0034] It is understandable that the locking strip 18 is provided with an elastic piece, which can engage with the first locking groove 161 and the second locking groove 171 to maintain the fixed engagement state of the first housing 16 and the second housing 17 when they are connected.

[0035] In addition, this utility model also provides an open-type perforated AC current transmitter circuit, which includes a power supply circuit, a signal acquisition circuit, an MCU circuit, and a communication circuit. The power supply circuit is used to supply power to the MCU circuit, the signal acquisition circuit is used to acquire voltage signals and transmit them to the MCU circuit, and the communication circuit is used to receive current data generated by the MCU circuit and transmit it to other devices.

[0036] Specifically, see Figure 3The power supply circuit is a DC 9-36V input circuit. Among them, fuse L2, varistor RV1, and TVS diode D8 constitute the EMC protection of the power input, diode D4 provides reverse connection protection, capacitors C22 and C14 provide filtering, and power chip U5 realizes the DC 5V output conversion.

[0037] Seen in Figure 4 In the signal acquisition circuit, TVS diode VD5 acts as a surge protector, and diode D7 acts as a voltage clamp. Resistors R27 and R28 form a current sampling circuit, converting the current signal into a voltage signal for transmission to the MCU. Resistors R26 and R29, and capacitors C27 and C29 act as signal filters.

[0038] Seen in Figure 5 In the MCU circuit, chip IC3 is responsible for processing the input signals from the acquisition circuit and calibrating the current data through the debugging interface J2. Chip IC3 transmits data externally via the communication circuit. Chip IC3 converts the current data into an analog signal for output through the analog output circuit. Chip IC3 outputs dry contact signals through the relay circuit to control external devices. Capacitors C5, C8, C9, C10, C11, C12, and C15 are the filter capacitors for chip IC3. Interface J7 is the programming port for chip IC3. Indicator lights D9 and D10, resistors R19 and R25 constitute the indicator light circuit.

[0039] Seen in Figure 6 In the communication circuit, chip U2 performs external communication. Resistors R10, R11, R12, and R34 are pull-up resistors for chip U2. Resistor R31 is a pull-down resistor for chip U2. Capacitors C28 and C31 are power supply filter capacitors for chip U2. TVS diodes D5, D22, and D23 clamp the external input level. Resistors R30 and R32 limit current.

[0040] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

Claims

1. An open-type perforated AC current transmitter, characterized in that, The transmitter body includes a rotatable cover on the top of the transmitter body, which is detachably fitted to the transmitter body. A first groove is provided on the transmitter body, and a second through groove is formed on the cover along the width direction. A first iron core with an opening is provided inside the transmitter body, and a second iron core with an opening is provided inside the cover. The first and second iron cores are used to abut against each other when the cover and the transmitter body are fixedly fitted.

2. The open-type perforated AC current transmitter according to claim 1, characterized in that, The transmitter has a first mounting cavity and a second mounting cavity formed sequentially along the height direction. The first mounting cavity contains a circuit board, and the second mounting cavity is used to cooperate with the first iron core.

3. The open-type perforated AC current transmitter according to claim 2, characterized in that, External plugs are provided on both sides of the transmitter body along its length, and corresponding connection sockets are provided on both sides of the circuit board. The connection sockets are used to mate with the external plugs.

4. The open-type perforated AC current transmitter according to claim 2, characterized in that, Coils are fitted at both ends of the first iron core, with the coils located at both ends along the length of the first slot.

5. The open-type perforated AC current transmitter according to claim 1, characterized in that, The mating cover includes an outer shell with an opening at one end, and a mating plate is detachably provided at the opening end of the outer shell for mating with the second iron core.

6. The open-type perforated AC current transmitter according to claim 1, characterized in that, One end of the cover is hinged to the top of the transmitter body along its length, and the other end is provided with a latching tongue. A corresponding limiting body is provided on the transmitter body, and the latching tongue and the limiting body are correspondingly engaged.

7. The open-type perforated AC current transmitter according to claim 5, characterized in that, A label is located on the end of the outer casing away from the mating plate.

8. The open-type perforated AC current transmitter according to claim 1, characterized in that, The transmitter body has mounting grooves at both ends along its length, and light guides are installed in the mounting grooves.

9. The open-type perforated AC current transmitter according to claim 1, characterized in that, The transmitter body includes a first housing and a second housing that are mated together.

10. The open-type perforated AC current transmitter according to claim 9, characterized in that, The first housing forms a first locking groove near the end of the second housing, and the second housing forms a corresponding second locking groove. The transmitter body also includes a locking strip, which is used to engage with the first locking groove and the second locking groove when the first housing and the second housing are connected.

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