CN220455510U - High-frequency current loop for calibrating oscilloscope current probe - Google Patents
High-frequency current loop for calibrating oscilloscope current probe Download PDFInfo
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- CN220455510U CN220455510U CN202321857207.1U CN202321857207U CN220455510U CN 220455510 U CN220455510 U CN 220455510U CN 202321857207 U CN202321857207 U CN 202321857207U CN 220455510 U CN220455510 U CN 220455510U
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- 239000000523 sample Substances 0.000 title claims abstract description 31
- 239000011810 insulating material Substances 0.000 claims abstract description 7
- 239000000956 alloy Substances 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims 2
- 238000012360 testing method Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model discloses a high-frequency current loop for calibrating an oscilloscope current probe, which comprises a cavity, wherein one side of the cavity is provided with a BNC connector, the tail end of the BNC connector penetrates through the side wall of the cavity and is welded with a precise high-frequency resistor, the precise high-frequency resistor is arranged in the cavity, the other end of the precise high-frequency resistor is led out from the other side of the cavity through an extension wire and is welded to the outer wall of the cavity to form a loop, and an insulating material is arranged between the extension wire and the cavity. According to the utility model, the precision high-frequency resistor can be replaced according to the bandwidth and accuracy of the calibrated oscilloscope current probe, and the current loop can be rapidly maintained when faults occur, and the size of the current loop can be changed by changing the length of the extension wire according to the shape of the current probe, so that the problems that the integrated high-frequency current loop cannot be maintained due to damage and the current loop shape is fixed and the calibration of the current probe with a large shape cannot be satisfied are solved.
Description
Technical Field
The utility model relates to the technical field of oscilloscope current probe calibration, in particular to a high-frequency current loop for calibrating an oscilloscope current probe.
Background
Oscilloscope current probes are widely used for testing current parameters in factories, research institutions and the like for products or test processes. Moreover, more and more units pay more attention to the test of the high-frequency current parameters, and whether the high-frequency current parameters are accurate or not is directly related to the judgment of products or test results. The bandwidth of the current probe of the oscilloscope generally adopts a standard voltage source to generate a high-frequency voltage signal, the high-frequency current signal is generated through a high-frequency current loop to calibrate the bandwidth of the current of the oscilloscope, so that the unified magnitude is ensured, and the test result is accurate and reliable.
The high-frequency current loop adopted in the current calibration mostly adopts the current loop with integrated fixed shape and standard voltage source standard, and the high-frequency current loop can not be maintained if damaged due to the integrated design, and the current loop is fixed and can not meet the calibration of the current probe with large shape, so that the bandwidth of the current probe of the oscilloscope can not be traced, and the accuracy and reliability of the measurement result can not be ensured.
Disclosure of Invention
The utility model aims to provide a high-frequency current loop for calibrating an oscilloscope current probe, which aims to solve the problems that the integrated high-frequency current loop cannot be maintained due to damage, and the current loop is fixed and cannot meet the calibration of a large-shape current probe, so that the bandwidth of the oscilloscope current probe cannot be traced, the accuracy and reliability of a measurement result cannot be ensured, and the like.
The technical scheme of the utility model is that the high-frequency current loop for calibrating the oscilloscope current probe comprises a cavity, a BNC connector, a precise high-frequency resistor and an extension wire, wherein the BNC connector is fixedly arranged on one side of the cavity, the tail end of the BNC connector penetrates through the side wall of the cavity, the precise high-frequency resistor is arranged in the cavity, one end of the precise high-frequency resistor is welded with the tail end of the BNC connector, and the other end of the precise high-frequency resistor is led out from the other side of the cavity through the extension wire and then welded to the outer wall of the cavity to form a loop.
Preferably, an insulating material is arranged between the extension wire and the side wall of the cavity.
Preferably, the precise high-frequency resistor is a non-inductive resistor, the working frequency range is direct current to 500MHz, the resistance value is 50 ohms, the accuracy is +/-1%, and the rated power is 2W.
Preferably, the BNC connector is mounted on the cavity by a screw.
Preferably, the extension wire adopts flexible wire, is equipped with the reel that adopts insulating material to prepare on the cavity lateral wall, and the extension wire is drawn forth the back from the cavity lateral wall and is reeled through the reel and is connected to the cavity outer wall again.
Preferably, the top end of the cavity is provided with an opening, and the opening is detachably and fixedly connected with a cover plate.
Preferably, the cavity is a box body prepared from an alloy material.
Compared with the prior art, the utility model has the beneficial effects that: the utility model can replace the precise high-frequency resistor according to the bandwidth and accuracy of the calibrated oscilloscope current probe, and can quickly maintain the oscilloscope current probe when the current loop fails, and can also change the size of the current loop by changing the length of the extension wire according to the shape of the current probe, thereby solving the problems that the integrated high-frequency current loop cannot be maintained due to damage, the calibration of the current probe with large shape cannot be satisfied due to the fixed current loop shape, the bandwidth magnitude of the oscilloscope current probe cannot trace the source, the accuracy and reliability of the measurement result cannot be ensured, and the like. The adoption of the standard BNC connector ensures good circuit contact and prolongs the service life.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a left side view of the present utility model;
FIG. 3 is a front view of the present utility model;
fig. 4 is a right side view of the present utility model.
Detailed Description
The utility model will be further explained in relation to the drawings of the specification, so as to be better understood by those skilled in the art.
As shown in figures 1-4, the high-frequency current loop for calibrating the oscilloscope current probe comprises a cavity 2, a BNC connector 1, a precise high-frequency resistor 3, an extension lead 4 and a cover plate 5.
The cavity 2 is a box body prepared from alloy materials, the input end of the current ring is mounted on the cavity 2 through a screw by adopting a standard BNC connector 1, the tail end of the BNC connector 1 penetrates through the side wall of the cavity, the precise high-frequency electric 3 resistor is mounted inside the cavity, one end of the precise high-frequency electric 3 is welded with the tail end of the BNC connector 1, and the other end of the precise high-frequency electric 3 is led out from the other side of the cavity 2 through an extension lead 4 and then welded to the outer wall of the cavity 2 to form a loop.
The precise high-frequency resistor 3 is a non-inductive resistor, the working frequency range is direct current to 500MHz, the resistance value is 50 ohms, the accuracy is +/-1%, and the rated power is 2W.
Specifically, an insulating material 6 is arranged between the extension wire 4 and the side wall of the cavity 2, and is used for isolating the extension wire 4 and the cavity 2.
The extension wire 4 adopts flexible wire, is equipped with the reel 7 that adopts insulating material to prepare on the cavity 2 lateral wall, and extension wire 4 is from cavity 2 lateral wall after drawing out through reel 7 coiling reconnection to cavity 2 outer wall to can change extension wire's length through rotating the reel to adapt to different shape current probes and use. The top end of the cavity 2 is provided with an opening, and a cover plate 5 is detachably and fixedly connected to the opening. The cover plate 5 can be installed on the cavity 2 in a screw connection and clamping mode, and the precision high-frequency resistor 3 can be maintained or replaced conveniently by opening the cover plate 5.
When the method is used for calibrating the bandwidth of the oscilloscope current probe, the operation is stable, the method is scientific and reasonable, the uncertainty of the measurement result is small, the test data is accurate and reliable, and the consistency is good.
Claims (7)
1. The utility model provides an oscilloscope current probe calibration is with high frequency current ring, its characterized in that includes cavity (2), BNC connects (1), accurate high frequency resistance (3) and extension wire (4), BNC connects (1) fixed mounting in cavity (2) one side and terminal runs through cavity (2) lateral wall, and accurate high frequency resistance (3) are installed in cavity (2), and one end and BNC connect (1) terminal welding, and the other end forms the loop on the outer wall of cavity (2) through the extension wire (4) from the welding after the cavity (2) opposite side is drawn forth.
2. The high-frequency current loop for calibrating the oscilloscope current probe according to claim 1, wherein an insulating material (6) is arranged between the extension wire (4) and the side wall of the cavity (2).
3. The high-frequency current loop for calibrating the oscilloscope current probe according to claim 1, wherein the precise high-frequency resistor (3) is a non-inductive resistor, the working frequency range is direct current to 500MHz, the resistance value is 50 ohms, the accuracy is +/-1%, and the rated power is 2W.
4. The high-frequency current loop for calibrating an oscilloscope current probe according to claim 1, wherein the BNC connector (1) is installed on the cavity (2) through a screw.
5. The high-frequency current loop for calibrating the oscilloscope current probe according to claim 1, wherein the extension wire (4) is a flexible wire, a coiling wheel (7) made of an insulating material is arranged on the side wall of the cavity (2), and the extension wire (4) is led out from the side wall of the cavity (2) and then is coiled by the coiling wheel (7) and then connected to the outer wall of the cavity (2).
6. The high-frequency current loop for calibrating the oscilloscope current probe according to claim 1, wherein an opening is arranged at the top end of the cavity (2), and a cover plate (5) is detachably and fixedly connected to the opening.
7. The high-frequency current loop for calibrating the oscilloscope current probe according to claim 1, wherein the cavity (2) is a box body made of alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321857207.1U CN220455510U (en) | 2023-07-14 | 2023-07-14 | High-frequency current loop for calibrating oscilloscope current probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321857207.1U CN220455510U (en) | 2023-07-14 | 2023-07-14 | High-frequency current loop for calibrating oscilloscope current probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220455510U true CN220455510U (en) | 2024-02-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321857207.1U Active CN220455510U (en) | 2023-07-14 | 2023-07-14 | High-frequency current loop for calibrating oscilloscope current probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220455510U (en) |
-
2023
- 2023-07-14 CN CN202321857207.1U patent/CN220455510U/en active Active
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