CN214151024U - System based on alternating magnetic field coil equivalent induction area calibration - Google Patents
System based on alternating magnetic field coil equivalent induction area calibration Download PDFInfo
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- CN214151024U CN214151024U CN202023062555.9U CN202023062555U CN214151024U CN 214151024 U CN214151024 U CN 214151024U CN 202023062555 U CN202023062555 U CN 202023062555U CN 214151024 U CN214151024 U CN 214151024U
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Abstract
The utility model discloses a system based on alternating magnetic field coil equivalent induction area calibration, which comprises a current source, a fixed resistor, a long straight solenoid, a coil fixing clamp, a standard coil and a voltage acquisition device; one end output of the current source is connected to a power resistor, and the fixed resistor is connected with the other end of the current source in series to form a loop; the standard coil and the coil to be detected are respectively fixed on the coil fixing clamp; the coil fixing clamp is placed in the long straight solenoid, so that the positions of the standard coil and the coil to be detected are symmetrical relative to the center of the long straight solenoid, the two ends of the standard coil and the two ends of the coil to be detected are connected to the two acquisition ports of the voltage acquisition equipment respectively, and the output voltages of the standard coil and the coil to be detected are acquired simultaneously. The utility model discloses can the rapid survey coil's that awaits measuring equivalent induction area, mark easy operation, mark the precision and can reach within the thousandth to mark when can realizing a plurality of probe coils.
Description
Technical Field
The utility model relates to electromagnetic measurement technical field, concretely relates to system based on alternating magnetic field high accuracy probe coil equivalence induction area is markd.
Background
The magnetic field probe coil is formed by winding a plurality of circles of conducting wires on a framework made of nonmagnetic materials, all the circles are mutually insulated, the magnetic field intensity of the spatial position where the magnetic field probe coil is located can be measured through electromagnetic induction, and the magnetic field probe coil has the characteristics of high measurement accuracy, stable work at high temperature and the like. The individual difference is inevitably generated in the winding process of the probe coil, so each coil needs to be calibrated after the winding is finished, and the probe coil can be used after the calibration is finished. Coil calibration system commonly used in the existing market all relies on large-scale magnet to produce strong magnetic field, and then marks in strong magnetic field, because large-scale magnet is difficult for obtaining, and need use hall element to measure magnetic field intensity and degree of consistency when using, complex operation is not applicable to and marks a large amount of coils one by one.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a probe coil induction area calibration system based on alternating magnetic field high efficiency, which can accurately calibrate the induction area of the coil and realize the simultaneous calibration of the areas of a plurality of probe coils; the method does not depend on a large magnet and high-precision feedback current, does not need to measure the magnetic field intensity during use, can simply and quickly realize the area calibration of a large number of probes in a laboratory, and has the maximum relative error less than one per thousand.
The technical scheme of the utility model is that: a system based on alternating magnetic field coil equivalent induction area calibration comprises a current source, a fixed resistor, a long straight solenoid, a coil fixing clamp, a standard coil and a voltage acquisition device; one end output of the current source is connected to a power resistor, and the fixed resistor is connected with the other end of the current source in series to form a loop; the standard coil and the coil to be detected are respectively fixed on the coil fixing clamp; the coil fixing clamp is placed in the long straight solenoid, so that the positions of the standard coil and the coil to be detected are symmetrical relative to the center of the long straight solenoid, the two ends of the standard coil and the two ends of the coil to be detected are connected to the two acquisition ports of the voltage acquisition equipment respectively, and the output voltages of the standard coil and the coil to be detected are acquired simultaneously.
Furthermore, the number of the probe coils to be detected is one or more, and the probe coils can be simultaneously fixed at different positions of the coil fixing clamp for simultaneous measurement; the output voltage of each probe coil is connected to a different voltage acquisition port of a voltage acquisition device.
Furthermore, the fixed resistor is a high-power resistor, the resistor is 5-20 ohms, and the power is 1000-5000 watts.
Furthermore, the current source is a sinusoidal current source with adjustable frequency and amplitude, and the current output with a peak value of more than 3A can be realized when the working frequency is 100-500 Hz.
Furthermore, the length of the long straight solenoid is 500mm-1500mm, the long straight solenoid can be adjusted according to the number of the probe coils to be measured, and more coils can be measured simultaneously by increasing the length and the number of turns of the solenoid.
Furthermore, the coil fixing clamp ensures that the relative positions of the probe coil to be detected, the standard coil and the solenoid are fixed and are symmetrically distributed on two sides of the central section of the solenoid, the coil fixing clamp comprises a coil fixing base, a plurality of coil adjusting supports are arranged on the coil fixing base and are arranged in a bilateral symmetry mode along the central line of the solenoid, and a push-pull handle is arranged at the front end of the coil fixing base.
Has the advantages that:
the utility model discloses can be under simple laboratory condition quick realization probe equivalence response area's demarcation, provide feasible system for large batch probe is markd.
Furthermore, by means of simply lengthening the length and the number of turns of the solenoid and calibrating the relative strength of the magnetic field at different positions in the solenoid, the simultaneous calibration of a plurality of probes to be tested can be realized, and the working efficiency can be further improved.
In addition, all probes to be detected are calibrated by using the same standard probe, so that the consistency of all probes is ensured.
The utility model discloses the probe that awaits measuring is in same alternating magnetic field with standard probe, can eliminate the unstable measuring error who comes the area of alternating magnetic field that causes by reasons such as power fluctuation, and probe equivalent area marks the precision and can reach within 1 thousandth.
Drawings
FIG. 1: the utility model discloses a schematic diagram of a whole calibration system;
FIG. 2: the utility model discloses the coil mounting fixture who uses.
Description of reference numerals: the device comprises a long straight solenoid 1, a fixed resistor 2, a current source 3, a voltage acquisition device 5, a standard coil 6, a coil to be detected 7, a push-pull handle 8, a coil adjusting support 9 and a coil fixing base 10.
Detailed Description
The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any inventive work belong to the protection scope of the present invention based on the embodiments of the present invention.
Fig. 1 shows a system based on calibration of equivalent induction area of alternating magnetic field high precision probe coil, which includes a current source 3, a high power winding fixed resistor 2(2000W, 10 Ω), a long straight solenoid 1 (the solenoid of the present invention has a length of 1 meter and turns of 248 turns, which can increase the length and turns according to the requirement), a coil fixing clamp, a standard coil 6 and a NI portable voltage collecting device; one end output of the current source is connected to a power resistor, and the fixed resistor 2 is connected with the long straight solenoid 1 in series and then connected to the other end of the current source 3 to form a loop; and the standard coil 6 and the coil 7 to be measured are respectively fixed on the coil fixing clamp, and the two coils are symmetrically arranged at equal intervals from the center of the solenoid. The two ends of the standard coil 6 and the coil 7 to be tested are respectively connected to the two acquisition ports of the voltage acquisition equipment 5, and the output voltages of the standard coil 6 and the coil 7 to be tested are acquired simultaneously.
The frequency amplitude of the sinusoidal current source used by the system can be adjusted, and the output of the peak value above 3A can be realized when the working frequency is 100-500 Hz.
The NI voltage acquisition equipment adopted by the system has the models of cDAQ-9174 and NI 9215, and can realize simultaneous acquisition of 16 paths of voltage signals by matching.
The length of the long straight solenoid designed and manufactured by the system is 1 meter, the number of turns of the coil is 248 turns, and calculation and measurement show that the magnetic field is uniformly distributed near the central position. The length of the solenoid and the number of coil turns can be increased or decreased according to the requirements of a specific system, but considering that the increase of the number of coil turns can increase the loop inductance, the output power of the power supply is limited, and the length of the solenoid and the number of coil turns can not be increased without limitation.
Fig. 2 is the utility model discloses a coil mounting fixture, it is fixed with the relative position of standard coil and solenoid to have guaranteed that the probe coil that awaits measuring is symmetrical distribution in the central cross-section both sides of solenoid. The coil fixing clamp comprises a coil fixing base 10, a plurality of coil adjusting supports 9 are arranged on the coil fixing base, the coil adjusting supports 9 are arranged in a bilateral symmetry mode along the center line of the solenoid, and a push-pull handle 8 is arranged at the front end of the coil fixing base 10.
The utility model discloses the standard coil (also be standard probe coil) that uses, it is self through the high accuracy calibration.
Although illustrative embodiments of the invention have been described above to facilitate the understanding of the invention by those skilled in the art, it should be understood that the invention is not limited to the scope of the embodiments, and that various changes will become apparent to those skilled in the art once they are within the spirit and scope of the invention as defined and defined in the appended claims.
Claims (6)
1. The utility model provides a system based on alternating magnetic field coil equivalent induction area is markd which characterized in that: the device comprises a current source, a fixed resistor, a long straight solenoid, a coil fixing clamp, a standard coil and a voltage acquisition device; one end output of the current source is connected to a power resistor, and the fixed resistor is connected with the other end of the current source in series to form a loop; the standard coil and the coil to be detected are respectively fixed on the coil fixing clamp; the coil fixing clamp is placed in the long straight solenoid, so that the positions of the standard coil and the coil to be detected are symmetrical relative to the center of the long straight solenoid, the two ends of the standard coil and the two ends of the coil to be detected are connected to the two acquisition ports of the voltage acquisition equipment respectively, and the output voltages of the standard coil and the coil to be detected are acquired simultaneously.
2. The system of claim 1, wherein the system comprises:
the number of the probe coils to be detected is one or more, and the probe coils can be simultaneously fixed at different positions of the coil fixing clamp for simultaneous measurement; the output voltage of each probe coil is connected to a different voltage acquisition port of a voltage acquisition device.
3. The system of claim 1, wherein the system comprises:
the fixed resistor is a high-power resistor, the resistor is 5-20 ohms, and the power is 1000-5000 watts.
4. The system of claim 1, wherein the system comprises:
the current source is a sinusoidal current source with adjustable frequency and amplitude, and can realize current output above the peak value of 3A when the working frequency is 100-500 Hz.
5. The system of claim 1, wherein the system comprises:
the length of the long straight solenoid is 500mm-1500mm, the long straight solenoid can be adjusted according to the number of the probe coils to be measured, and more coils can be measured simultaneously by increasing the length and the number of turns of the solenoid.
6. The system of claim 1, wherein the system comprises:
the coil fixing clamp ensures that the relative positions of a probe coil to be detected, a standard coil and a solenoid are fixed and are symmetrically distributed on two sides of the central section of the solenoid, the coil fixing clamp comprises a coil fixing base, a plurality of coil adjusting supports are arranged on the coil fixing base and are arranged in a bilateral symmetry mode along the central line of the solenoid, and a push-pull handle is arranged at the front end of the coil fixing base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023062555.9U CN214151024U (en) | 2020-12-18 | 2020-12-18 | System based on alternating magnetic field coil equivalent induction area calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023062555.9U CN214151024U (en) | 2020-12-18 | 2020-12-18 | System based on alternating magnetic field coil equivalent induction area calibration |
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| Publication Number | Publication Date |
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| CN214151024U true CN214151024U (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023062555.9U Active CN214151024U (en) | 2020-12-18 | 2020-12-18 | System based on alternating magnetic field coil equivalent induction area calibration |
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| CN (1) | CN214151024U (en) |
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