CN220064208U - Non-access current measuring device based on Hall sensor - Google Patents
Non-access current measuring device based on Hall sensor Download PDFInfo
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- CN220064208U CN220064208U CN202321387355.1U CN202321387355U CN220064208U CN 220064208 U CN220064208 U CN 220064208U CN 202321387355 U CN202321387355 U CN 202321387355U CN 220064208 U CN220064208 U CN 220064208U
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- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 9
- 229920006351 engineering plastic Polymers 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a non-access current measuring device based on a Hall sensor, which comprises an upper half magnetic ring arranged on an upper half magnetic ring and a lower half magnetic ring arranged on a lower half magnetic ring of the magnetic ring, wherein the upper half magnetic ring and the lower half magnetic ring are combined into a circular ring, and the Hall sensors for converting a magnetic field between the upper half magnetic ring and the lower half magnetic ring into voltage are respectively arranged at two openings between the upper half magnetic ring and the lower half magnetic ring; the back of the lower half hoop of the magnetic ring is provided with a circuit board cover plate, the circuit board is arranged in the circuit board cover plate, and the output end of the Hall sensor is connected with the circuit board through a wire. The utility model does not need to disconnect a tested circuit, induces a relatively stable magnetic field formed by direct current through the Hall sensor, converts the magnetic field into voltage proportional to the direct current, converts the voltage into current, and uploads the current to the monitoring alarm system through the R2485 bus.
Description
Technical Field
The utility model relates to the technical field, in particular to a non-access current measuring device based on a Hall sensor.
Background
In general, the current measurement is to disconnect the circuit to be measured, connect a current sensor in series to measure the current, or connect a sampling resistor in series, and convert the voltage drop across the sampling resistor into the current. The above method is feasible for small current measurement. However, for high currents, e.g., currents of tens, hundreds, and even thousands of amperes, there are several problems with using the above method to measure:
1) The large current circuit should reduce the connection point, concatenate the current sensor or resistance, will increase two connection points necessarily, under the condition of large current, such connection point will increase the circuit connection cost or increase the contact resistance, even several mΩ's resistance will also produce larger voltage drop and heat consumption under hundred A's current;
2) The high-current sensor and the sampling resistor are difficult to select under the high-current condition;
3) For the alternating current heavy current measurement, a current transformer can be used for realizing the non-access measurement by electric-magnetic-electric conversion, and for the direct current, the current transformer cannot be used for realizing the energy conversion and transmission by electromagnetic induction because the alternating current forms an alternating magnetic field through alternating current, and the direct current cannot form an alternating magnetic field, so the energy conversion and transmission cannot be realized by electromagnetic induction.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a non-access current measuring device based on a Hall sensor, which can obtain the current of a tested heavy current cable without disconnecting a tested circuit.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.
The non-access current measuring device based on the Hall sensor comprises an upper half magnetic ring arranged on an upper half magnetic ring and a lower half magnetic ring arranged on a lower half magnetic ring, wherein the upper half magnetic ring and the lower half magnetic ring are combined into a circular ring, and the Hall sensors for converting a magnetic field between the upper half magnetic ring and the lower half magnetic ring into voltage are respectively arranged at two openings between the upper half magnetic ring and the lower half magnetic ring; the back of the lower half hoop of the magnetic ring is provided with a circuit board cover plate, the circuit board is arranged in the circuit board cover plate, and the output end of the Hall sensor is connected with the circuit board through a wire.
According to the further optimized technical scheme, the upper half hoop of the magnetic ring is provided with a buckle, and the lower half hoop of the magnetic ring is provided with a buckle table matched with the buckle.
According to the further optimized technical scheme, the width of the opening between the upper half magnetic ring and the lower half magnetic ring is larger than the thickness of the Hall sensor.
Further optimizing technical scheme, be provided with the controller that is used for converting the voltage of hall sensor output into electric current and be used for transmitting current signal's RS485 module on the circuit board, hall sensor's output is connected the input of controller, and the input of RS485 module is connected to the output of controller, and the output of RS485 module passes through the RS485 bus and connects outside monitoring alarm system.
Further optimizing the technical scheme, the Hall sensor is an MT9512 Hall sensor.
According to the technical scheme, the upper half hoop of the magnetic ring, the lower half hoop of the magnetic ring and the circuit board cover plate are all engineering plastics.
By adopting the technical scheme, the utility model has the following technical progress.
According to the non-access current measuring device based on the Hall sensor, a measured circuit does not need to be disconnected, a relatively stable magnetic field formed by direct current is induced by the Hall sensor, the magnetic field is converted into voltage proportional to the direct current, then the voltage is converted into current, and the current is uploaded to a monitoring alarm system through an RS485 bus.
Drawings
Fig. 1 is an exploded view of the present utility model.
Wherein: 1. the magnetic ring comprises an upper half hoop, a buckle, a lower half hoop, a buckle table, an upper half magnetic ring, a lower half magnetic ring, a Hall sensor, a circuit board and a circuit board cover plate.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the specific embodiments.
The non-access current measuring device based on the Hall sensor comprises an upper half hoop 1 of a magnetic ring, a lower half hoop 3 of the magnetic ring and a circuit board cover plate 9 in combination with fig. 1. The upper half hoop 1 of the magnetic ring is movably connected with the lower half hoop 3 of the magnetic ring, and the circuit board cover plate 9 is arranged on the back of the lower half hoop 3 of the magnetic ring.
An upper half magnetic ring 5 is arranged on the upper half magnetic ring 1, a lower half magnetic ring 6 is arranged on the lower half magnetic ring 3, the upper half magnetic ring 5 and the lower half magnetic ring 6 are combined into a circular ring, and Hall sensors 7 are respectively arranged at two openings between the upper half magnetic ring 5 and the lower half magnetic ring 6 and used for converting a magnetic field between the upper half magnetic ring 5 and the lower half magnetic ring 6 into voltage.
The width of the opening between the upper half magnetic ring 5 and the lower half magnetic ring 6 is larger than the thickness of the Hall sensor. In the utility model, the Hall sensor adopts the MT9512 Hall sensor, so that the data reliability of the test can be improved.
The upper half hoop 1 of the magnetic ring is provided with the buckle 2, the lower half hoop 3 of the magnetic ring is provided with the buckle platform 4, the buckle 2 and the buckle platform 4 are assembled together, when the upper half hoop of the magnetic ring is connected, the buckle on the upper half hoop of the magnetic ring is clamped on the buckle platform on the lower half hoop of the magnetic ring, and the buckle arms of the buckle 2 are elastic, can be separated by external force and are locked by virtue of elasticity.
The circuit board 8 is arranged in the circuit board cover plate 9, the output end of the Hall sensor is connected with the circuit board 8 through a lead, and voltage signals collected by the Hall sensor are transmitted to the circuit board for processing.
The circuit board is provided with a controller and an RS485 module, the controller is used for converting voltage output by the Hall sensor into current, the RS485 module is used for carrying out current signal transmission, the output end of the Hall sensor is connected with the input end of the controller, the output end of the controller is connected with the input end of the RS485 module, and the output end of the RS485 module is connected with an external monitoring alarm system through an RS485 bus.
In order to ensure the internal safety of the embedded tested object and prevent short circuit caused by touching the electrical circuit of the tested object after the embedding, the upper half hoop of the magnetic ring, the lower half hoop of the magnetic ring and the circuit board cover plate are all made of engineering plastics so as to improve the insulating performance of the upper half hoop of the magnetic ring, the lower half hoop of the magnetic ring and the circuit board cover plate.
Before installation, the upper half hoop and the lower half hoop of the magnetic ring are separated, the upper half magnetic ring is installed in the upper half hoop of the magnetic ring, the lower half magnetic ring is installed in the lower half hoop of the magnetic ring, and when the magnetic ring is installed, a tested high-current cable is embedded between the upper half hoop and the lower half hoop of the magnetic ring, and the upper half hoop and the lower half hoop of the magnetic ring are combined, so that the buckle of the upper half hoop of the magnetic ring is clamped on the buckle table of the lower half hoop.
During detection, the Hall sensor converts a magnetic field signal between the upper half magnetic ring and the lower half magnetic ring into voltage, the circuit board converts the voltage signal into a current signal, the current signal is uploaded to the monitoring alarm system through the RS485 bus, and a worker can acquire the current signal of the tested cable from the monitoring alarm system.
Claims (6)
1. Non-access current measuring device based on hall sensor, its characterized in that: the magnetic ring comprises an upper half magnetic ring (5) arranged on an upper half magnetic ring (1) and a lower half magnetic ring (6) arranged on a lower half magnetic ring (3), wherein the upper half magnetic ring (5) and the lower half magnetic ring (6) are combined into a circular ring, and two openings between the upper half magnetic ring (5) and the lower half magnetic ring (6) are respectively provided with a Hall sensor (7) for converting a magnetic field between the upper half magnetic ring (5) and the lower half magnetic ring (6) into voltage; the back of the lower half hoop (3) of the magnetic ring is provided with a circuit board cover plate (9), the circuit board (8) is arranged in the circuit board cover plate (9), and the output end of the Hall sensor (7) is connected with the circuit board (8) through a wire.
2. The hall sensor-based non-access current measurement apparatus of claim 1, wherein: the magnetic ring is characterized in that a buckle (2) is arranged on the upper half hoop (1) of the magnetic ring, and a buckle table (4) matched with the buckle (2) is arranged on the lower half hoop (3) of the magnetic ring.
3. The hall sensor-based non-access current measurement apparatus of claim 1, wherein: the width of the opening between the upper half magnetic ring (5) and the lower half magnetic ring (6) is larger than the thickness of the Hall sensor.
4. The hall sensor-based non-access current measurement apparatus of claim 1, wherein: the circuit board (8) is provided with a controller for converting voltage output by the Hall sensor into current and an RS485 module for transmitting current signals, the output end of the Hall sensor is connected with the input end of the controller, the output end of the controller is connected with the input end of the RS485 module, and the output end of the RS485 module is connected with an external monitoring alarm system through an RS485 bus.
5. The hall sensor-based non-access current measurement apparatus of claim 1, wherein: the Hall sensor is an MT9512 Hall sensor.
6. The hall sensor-based non-access current measurement apparatus of claim 1, wherein: the upper half hoop (1), the lower half hoop (3) and the circuit board cover plate (9) of the magnetic ring are all engineering plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321387355.1U CN220064208U (en) | 2023-06-02 | 2023-06-02 | Non-access current measuring device based on Hall sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321387355.1U CN220064208U (en) | 2023-06-02 | 2023-06-02 | Non-access current measuring device based on Hall sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220064208U true CN220064208U (en) | 2023-11-21 |
Family
ID=88785170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321387355.1U Active CN220064208U (en) | 2023-06-02 | 2023-06-02 | Non-access current measuring device based on Hall sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220064208U (en) |
-
2023
- 2023-06-02 CN CN202321387355.1U patent/CN220064208U/en active Active
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