CN210465525U - Open-type fluxgate current sensor - Google Patents
Open-type fluxgate current sensor Download PDFInfo
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- CN210465525U CN210465525U CN201920505464.6U CN201920505464U CN210465525U CN 210465525 U CN210465525 U CN 210465525U CN 201920505464 U CN201920505464 U CN 201920505464U CN 210465525 U CN210465525 U CN 210465525U
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Abstract
An open type fluxgate current sensor comprises a base, wherein a first semicircular magnetic core installation groove is formed in the base, a second semicircular magnetic core installation groove is hinged to the first semicircular magnetic core installation groove, a first semicircular magnetic core is placed in the first semicircular magnetic core installation groove, and a second semicircular magnetic core is placed in the second semicircular magnetic core installation groove; the detection device comprises a detection coil and a circuit board which are wound at the bottom of the second semicircular magnetic core, the detection coil is sequentially connected with a peak detection circuit, an instrument amplification circuit, a filter amplification circuit and a single chip microcomputer on the circuit board, and the single chip microcomputer is connected with a PWM output circuit and a Signal output circuit. The utility model provides an open-type current sensor, which has low cost, convenient installation, wide power supply range and high insulation grade, adopts a glue sealing mode and has high insulation grade, thereby being capable of effectively preventing water, moisture and dust; the installation form is various, but vertical installation, but horizontal installation.
Description
Technical Field
The utility model relates to an electromagnetic induction technical field, especially an open-type current sensor.
Background
The current sensor is a detection device which can sense the information of the current to be detected and convert the sensed information into an electric signal meeting certain standards or other information in required forms according to a certain rule for output so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like. For a mature system in the existing equipment, it is inconvenient to install a current sensor on a lead. If the lead is required to be installed, the lead is required to be reconnected after the current sensor is installed on the lead.
Disclosure of Invention
The utility model aims to solve the technical problem that an open-type current sensor is provided, be convenient for install additional, upgrade and replace on existing equipment or circuit.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: an open type fluxgate current sensor comprises a base, wherein a first semicircular magnetic core installation groove is formed in the base, a second semicircular magnetic core installation groove is hinged to the first semicircular magnetic core installation groove, a first semicircular magnetic core is placed in the first semicircular magnetic core installation groove, and a second semicircular magnetic core is placed in the second semicircular magnetic core installation groove; the detection device comprises a detection coil and a circuit board which are wound at the bottom of the second semicircular magnetic core, the detection coil is sequentially connected with a peak detection circuit, an instrument amplification circuit, a filter amplification circuit and a single chip microcomputer on the circuit board, and the single chip microcomputer is connected with a PWM output circuit and a Signal output circuit.
Preferably, magnetic core through holes are formed in the two ends of the first semicircular magnetic core mounting groove and the two ends of the second semicircular magnetic core mounting groove.
Preferably, one side of the second semicircular magnetic core mounting groove is provided with a buckling plate, a lock hole is formed in the buckling plate, and one side of the first semicircular magnetic core mounting groove is provided with a wedge-shaped bulge matched with the lock hole.
Preferably, the back of the base is provided with a mounting hole, and the bottom of the base is provided with a mounting notch.
Preferably, the base, the first semicircular magnetic core mounting groove, the second semicircular magnetic core mounting groove and the buckle plate are made of plastic materials.
Preferably, the edge of the first semicircular magnetic core mounting groove is provided with a limiting column, and a groove matched with the limiting column is formed in the circuit board.
Preferably, a limit stop is further arranged in the base.
Preferably, an opening is formed in the bottom of the first semicircular magnetic core installation groove.
Preferably, the circuit board is provided with a wire holder.
The utility model provides an open-type current sensor, which has low cost, convenient installation, wide power supply range and high insulation grade, adopts a glue sealing mode and has high insulation grade, thereby being capable of effectively preventing water, moisture and dust; the installation form is various, but vertical installation, but horizontal installation.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic perspective view of the present invention;
FIG. 3 is a schematic view of the magnetic core of the present invention;
fig. 4 is a schematic view of an external structure of the circuit board of the present invention;
FIG. 5 is a schematic structural view of the utility model after being opened;
fig. 6 is a top view of the utility model after opening;
fig. 7 is a perspective view of the utility model after being opened;
fig. 8 is a schematic structural view after a circuit board is mounted in the base of the present invention;
FIG. 9 is a schematic diagram of the peak detector circuit of the present invention;
FIG. 10 is a schematic diagram of an instrument amplification circuit of the present invention;
fig. 11 is a schematic diagram of the filter amplifying circuit of the present invention;
FIG. 12 is a circuit diagram of the peripheral circuit of the single chip microcomputer of the present invention;
fig. 13 is a PWM output circuit diagram of the present invention;
fig. 14 is a Signal output circuit diagram according to the present invention.
Detailed Description
As shown in fig. 1 to 7, an open fluxgate current sensor includes a base 1, a first semicircular magnetic core installation groove 2 is provided on the base 1, a second semicircular magnetic core installation groove 3 is hinged on the first semicircular magnetic core installation groove 2, a first semicircular magnetic core 4 is disposed in the first semicircular magnetic core installation groove 2, and a second semicircular magnetic core 5 is disposed in the second semicircular magnetic core installation groove 3; still include detection device, detection device is including winding detection coil 12 and the circuit board 11 of locating the semi-circular magnetic core 5 bottom of second, detection coil 12 is connected with peak detection circuit, instrument amplifier circuit, filtering amplifier circuit and the singlechip on the circuit board in proper order, the singlechip is connected with PWM output circuit and Signal output circuit.
Preferably, the first semicircular magnetic core mounting groove 2 and the second semicircular magnetic core mounting groove 3 are provided at both ends thereof with magnetic core through holes 6.
Preferably, one side of the second semicircular magnetic core mounting groove 3 is provided with a buckling plate 7, the buckling plate 7 is provided with a locking hole 8, and one side of the first semicircular magnetic core mounting groove 2 is provided with a wedge-shaped bulge 9 matched with the locking hole 8.
Preferably, the back of the base 1 is provided with a mounting hole 10, and the bottom of the base 1 is provided with a mounting notch 14.
Preferably, the base 1, the first semicircular magnetic core mounting groove 2, the second semicircular magnetic core mounting groove 3 and the pinch plate 7 are made of plastic materials.
Preferably, the edge of the first semicircular magnetic core installation groove 2 is provided with a limiting column 15, and the circuit board 11 is provided with a groove 16 matched with the limiting column 15.
Preferably, a limit stop 17 is further arranged in the base 1.
Preferably, the bottom of the first semicircular magnetic core installation groove 2 is provided with an opening.
Preferably, the circuit board 11 is provided with a wire holder 13.
As shown in fig. 8, in use, the first semicircular magnetic core 4 and the second semicircular magnetic core 5 are firstly placed from the magnetic core through hole 6, then the circuit board is placed in the base, the limiting column 15 is aligned with the groove 16 on the circuit board for fixing, the limiting stop 17 limits the circuit board, and the detection coil 12 is connected with the circuit board through the opening at the bottom of the first semicircular magnetic core installation groove 2. And after the magnetic core and the circuit board are installed, the magnetic core and the circuit board are sealed by hot melt adhesive and fixed.
As shown in fig. 9, in order to achieve the principle of the peak detector circuit of the present invention, the peak detection is performed by using the single-phase conduction of the diode and the memory principle of the capacitor for voltage, the peak at each time can be recorded, and the resistor connected in parallel with the capacitor mainly forms a discharge circuit.
As shown in fig. 10, for the instrument amplification circuit schematic diagram of the present invention, the instrument amplification has high input impedance and high amplification factor, and can amplify weak signals.
As shown in FIG. 11, for the schematic diagram of the filter amplifying circuit of the present invention, the circuit employs Butterworth second-order filtering, and has maximum flatness in the pass band and attenuation speed of-40 dB/10 frequency multiplication.
As shown in fig. 12, for the peripheral circuit diagram of the single chip microcomputer of the present invention, the single chip microcomputer of STM8 series is adopted to have lower cost.
As shown in fig. 13, for the PWM output circuit of the present invention, the 5V level signal is converted into 12V or higher by two mos, so as to improve the anti-interference performance.
As shown in fig. 14, in order to provide a Signal output circuit diagram of the present invention, a 5V level Signal is converted into 12V or more by two mos signals, thereby improving interference immunity.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (9)
1. An open-type fluxgate current sensor characterized in that: the magnetic core installation structure comprises a base (1), wherein a first semicircular magnetic core installation groove (2) is formed in the base (1), a second semicircular magnetic core installation groove (3) is hinged to the first semicircular magnetic core installation groove (2), a first semicircular magnetic core (4) is placed in the first semicircular magnetic core installation groove (2), and a second semicircular magnetic core (5) is placed in the second semicircular magnetic core installation groove (3); still include detection device, detection device is including around detecting coil (12) and circuit board (11) of locating second semicircular magnetic core (5) bottom, detecting coil (12) are connected with peak detection circuit, instrument amplifier circuit, filtering amplifier circuit and the singlechip on the circuit board in proper order, the singlechip is connected with PWM output circuit and Signal output circuit.
2. The open fluxgate current sensor according to claim 1, wherein: and magnetic core through holes (6) are arranged at two ends of the first semicircular magnetic core mounting groove (2) and the second semicircular magnetic core mounting groove (3).
3. The open fluxgate current sensor according to claim 1, wherein: one side of the second semicircular magnetic core mounting groove (3) is provided with a buckling plate (7), a lock hole (8) is formed in the buckling plate (7), and one side of the first semicircular magnetic core mounting groove (2) is provided with a wedge-shaped bulge (9) matched with the lock hole (8).
4. The open fluxgate current sensor according to claim 1, wherein: the back of base (1) is equipped with mounting hole (10), the bottom of base (1) is equipped with installation breach (14).
5. The open fluxgate current sensor according to claim 1, wherein: the base (1), the first semicircular magnetic core mounting groove (2), the second semicircular magnetic core mounting groove (3) and the buckle plate (7) are all made of plastic materials.
6. The open fluxgate current sensor according to claim 1, wherein: the edge of first semicircle magnetic core mounting groove (2) is equipped with spacing post (15), is equipped with on circuit board (11) with spacing post (15) matched with recess (16).
7. The open fluxgate current sensor according to claim 1, wherein: and a limiting stop (17) is also arranged in the base (1).
8. The open fluxgate current sensor according to claim 1, wherein: the bottom of the first semicircular magnetic core mounting groove (2) is provided with an opening.
9. The open fluxgate current sensor according to claim 1, wherein: and the circuit board (11) is provided with a wire holder (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920505464.6U CN210465525U (en) | 2019-04-15 | 2019-04-15 | Open-type fluxgate current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920505464.6U CN210465525U (en) | 2019-04-15 | 2019-04-15 | Open-type fluxgate current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210465525U true CN210465525U (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920505464.6U Active CN210465525U (en) | 2019-04-15 | 2019-04-15 | Open-type fluxgate current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210465525U (en) |
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2019
- 2019-04-15 CN CN201920505464.6U patent/CN210465525U/en active Active
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