Universal pulsed magnetic field standard gauge

Abstract

The application provides a general pulse magnetic field standard measuring tool, which comprises a quartz framework, a differential inductive probe, a flange, a high-frequency 4-core connector, and a pulse magnetic field display terminal; the differential inductive probe is arranged at the front end of the quartz inner tube; the quartz framework is fixedly connected to the bottom end of the flange; the inside of the flange is provided with an insulating part; the top end of the flange is sealingly and fixedly connected to a jack adapter through a sealing O ring; the jack adapter is provided with a high-frequency 4-core connector; the high-frequency 4-core connector is connected to the pulse magnetic field display terminal through a cable; the differential inductive probe converts the change of the pulse magnetic field into an electric signal and transmits the electric signal to the pulse magnetic field display terminal for display. The application can measure the pulse magnetic field amplitude in the range of 0.1T-40T and the pulse magnetic field frequency in the range of 100Hz-100kHz, and solves the problems of waveform distortion, low signal-to-noise ratio, poor repeatability and lack of universality of the existing pulse measuring tools.

Description

Technical Field

[0001] This invention belongs to the field of pulse magnetic field measurement technology and relates to a general-purpose pulse magnetic field standard measuring instrument. Background Technology

[0002] Currently, the measuring instruments used for pulsed magnetic fields mainly include B-dot magnetic probes and Hall sensors, but these are all dedicated test instruments designed and developed for specific applications. Existing measuring instruments suffer from various problems such as large nonlinear response waveforms, waveform distortion due to high-frequency signal loss, high output signal noise due to electromagnetic interference from the coupling environment, and poor measurement repeatability. There is a lack of a universally applicable, highly repeatable, and stable standard measuring instrument for pulsed magnetic fields, which hinders the interchangeability of measuring equipment and the standardization and transmission of pulsed magnetic field values ​​through metrological traceability. It is necessary to develop a universal standard measuring instrument for pulsed magnetic fields specifically designed for measuring pulsed magnetic fields in complex electromagnetic environments, addressing the need for accurate testing of various parameters in pulse generating devices such as electromagnetic catapults, electromagnetic propulsion, and pulse motors, and providing reliable data information for the optimized design of various pulse generating devices. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and to solve the problems of waveform distortion, low signal-to-noise ratio, poor repeatability and lack of universality of existing pulse gauges. Therefore, a universal pulse magnetic field standard gauge is proposed.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A general-purpose pulsed magnetic field standard measuring instrument includes a quartz frame with a pure copper silver-plated shielding layer, a differential induction probe, a flange, a high-frequency 4-core connector, and a pulsed magnetic field display terminal. The quartz frame includes an outer quartz tube and an inner quartz tube, with the inner tube fitted inside the outer quartz tube. The inner surface of the outer quartz tube is provided with a pure copper silver-plated shielding layer. The differential induction probe is located at the front end of the inner quartz tube. The quartz frame is fixedly connected to the bottom end of the flange, which has an insulating component inside. The top of the flange is sealed and fixedly connected to an aviation connector via a sealing O-ring. The aviation connector is equipped with a high-frequency 4-core connector, which is connected to the pulsed magnetic field display terminal via a cable. The differential induction probe senses changes in the pulsed magnetic field, converts them into electrical signals, and transmits them through the quartz inner tube, the insulating component, the high-frequency 4-core connector, and the cable to the pulsed magnetic field display terminal for display.

[0006] Specifically, the differential sensing probe includes a front detection coil, a rear detection coil, and a limiting threshold. The front detection coil is formed by seamlessly winding 0.08mm enameled wire around the outer wall of a 5mm outer diameter quartz inner tube. The limiting threshold is located on one side of the front detection coil, and the rear detection coil is formed seamlessly winding 0.08mm enameled wire on the outer wall of the quartz inner tube on the other side of the limiting threshold. The front and rear detection coils are connected in series and the edge spacing along the axial direction of the limiting threshold is 1mm. The overall design meets the requirements of the point coil measurement model: L / D≈0.866.

[0007] Specifically, the differential sensing probe has built-in parameters, including but not limited to: pulse magnetic field amplitude measurement range: 0.1T~40T; pulse magnetic field frequency measurement range: 100Hz~100kHz.

[0008] Specifically, the front detection coil has two leads, the rear detection coil has two leads, and the four leads are connected to the high-frequency 4-core connector through the insulating parts on the flange.

[0009] Specifically, both the inner and outer quartz tubes are hollow structures. The differential sensing probe is fixed to the end of the inner quartz tube. The lead wire connecting the differential sensing probe is fixedly installed inside the inner quartz tube, and the lead wire is treated with potting glue to ensure its fixed state. A pure copper silver-plated shielding layer is fixedly installed between the inner and outer quartz tubes.

[0010] Specifically, a pure copper silver-plated shielding layer covers the entire differential induction probe's front detection coil, rear detection coil, and leads. The pure copper silver-plated shielding layer is shorted to the flange and fixed by the flange pressing.

[0011] Specifically, the high-frequency 4-core connector outputs the electrical signals generated by the front and rear detection coils in the differential probe. Two cores in the high-frequency 4-core connector form a group, which are respectively connected to the two ends of the front detection coil and the two ends of the rear detection coil.

[0012] Beneficial effects:

[0013] This invention, by employing a differential induction probe, enables the measurement of pulse magnetic field amplitude within a range of 0.1T to 40T and pulse magnetic field frequency within a range of 100Hz to 100kHz, exhibiting good versatility. By embedding the differential induction probe within a quartz frame and using a pure copper silver-plated shielding layer, with the leads fixed inside the quartz frame by potting and shorted to the flange, the invention effectively improves the waveform distortion, small range, and low signal-to-noise ratio issues of pulse magnetic field measurement equipment. It can effectively meet the range and accuracy requirements of pulse magnetic field measurement in most situations. Attached Figure Description

[0014] Figure 1This is a connection diagram of the universal pulse magnetic field standard gauge of the present invention;

[0015] Figure 2 This is a schematic diagram of the winding of the detection coil in the differential probe of the present invention.

[0016] Figure 3 This is a schematic diagram of the flange structure and connection of the present invention.

[0017] Figure 4 This is a schematic diagram of the display interface of the pulse magnetic field display terminal of the present invention. Detailed Implementation

[0018] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0019] like Figures 1 to 3 As shown, a general-purpose pulsed magnetic field standard measuring instrument includes a quartz frame 1 with a pure copper silver-plated shielding layer 3, a differential induction probe 2, a flange 4, a high-frequency 4-core connector 5, and a pulsed magnetic field display terminal 6. The quartz frame 1 includes a quartz outer tube 11 and a quartz inner tube 12, with the inner tube 12 fitted inside the outer tube 11. The inner surface of the outer tube 12 is provided with a pure copper silver-plated shielding layer 3, and the differential induction probe 2 is located at the front end of the inner tube 12. The quartz frame 1 is fixedly connected to the bottom end of the flange 4, which can be made of brass. An insulating component 41 is provided inside the flange 4, and the top of the flange 4 is sealed and fixedly connected to an aviation plug adapter 43 by a sealing O-ring 42. The aviation plug adapter 43 is equipped with a high-frequency 4-core connector 5, which is connected to the pulsed magnetic field display terminal 6 via a cable. The differential induction probe 2 senses changes in the pulsed magnetic field, converts them into electrical signals, and transmits them to the pulsed magnetic field display terminal 6 via a cable for display.

[0020] The differential induction probe 2 includes a front detection coil 21, a rear detection coil 22, and a limiting threshold 23. The front detection coil 21 is formed by seamlessly winding 0.08mm enameled wire around the outer wall of a 5mm outer diameter quartz inner tube 12. A limiting threshold 23 is provided on one side of the front detection coil 21, and the rear detection coil 22 is formed seamlessly winding 0.08mm enameled wire on the outer wall of the quartz inner tube 12 on the other side of the limiting threshold 23. The front detection coil 21 and the rear detection coil 22 are connected in series and are spaced 1mm apart along the axial direction of the limiting threshold 23. Both the front detection coil 21 and the rear detection coil 22 have 20 turns, and the overall design meets the requirements of the point coil measurement model: L / D≈0.866. The front detection coil 21 and the rear detection coil 22 of the front and rear structures synchronously measure the pulse magnetic field changes in the same area, and the reception of external interference magnetic fields in the same area is consistent. By using a differential structure, the mutual inductance between the front detection coil 21 and the rear detection coil 22 can be reduced to the greatest extent, the influence of external interference magnetic fields can be reduced to the greatest extent, the signal-to-noise ratio can be improved, and the disorder of the final processed signal can be avoided.

[0021] The fixed-structure differential induction probe 2 has built-in parameters, including but not limited to: pulse magnetic field amplitude measurement range: 0.1T~40T; pulse magnetic field frequency measurement range: 100Hz~100kHz.

[0022] The front detection coil 21 is equipped with two leads, the rear detection coil is equipped with two leads, and the four leads pass through the insulating part 41 on the flange 4 and are connected to the high-frequency 4-core connector 5.

[0023] Both the inner quartz tube 12 and the outer quartz tube 11 are hollow structures used for fixing the differential sensing probe 2 and the lead wires. The differential sensing probe 2 is fixed to the end of the inner quartz tube 12. The lead wires connecting the differential sensing probe 2 are fixedly installed inside the inner quartz tube 12. The lead wires are fixed by potting glue to ensure their fixed state. A pure copper silver-plated shielding layer 3 is fixedly installed between the inner quartz tube 12 and the outer quartz tube 11. The pure copper silver-plated shielding layer 3 is used to shield the signal interference of the differential sensing probe 2 from the outside and reduce the distortion of the pulse signal sensed by the differential sensing probe 2. The pure copper silver-plated shielding layer 3 covers the entire front detection coil 21, rear detection coil 22 and lead wires of the differential sensing probe 2. The pure copper silver-plated shielding layer 3 is shorted to the flange 4 and is fixed by the flange 4.

[0024] The high-frequency 4-core connector 5 outputs the electrical signals generated by the front detection coil 21 and the rear detection coil 22 in the differential probe 2. Two cores of the high-frequency 4-core connector 5 are connected to the two ends of the front detection coil 21 and the two ends of the rear detection coil 22, respectively.

[0025] like Figure 4As shown, the pulse magnetic field is measured by differential probe 2. It is mainly used for single pulse signal measurement, but can also be used for continuous pulse signal measurement. The continuous pulse measurement time does not exceed 5 minutes. Specifically, the measured pulse signal includes pulse amplitude, pulse time, and pulse rise time.

[0026] A method for using a universal pulsed magnetic field standard gauge includes a differential probe connection step, an automatic loading of pre-set parameters step, an electrical signal conversion and transmission step, and a terminal processing step.

[0027] Differential probe connection steps: Place the differential probe 2 into the pulsed magnetic field, and connect it to the high-frequency 4-core connector and the pulsed magnetic field display terminal 6 through the cable;

[0028] Automatic loading of built-in parameters: Turn on the pulse magnetic field display terminal 6. The pulse magnetic field display terminal 6 automatically identifies the built-in parameters of the differential probe 2 and loads the preset parameters that match the built-in parameters.

[0029] Electrical signal conversion and transmission steps: The front detection coil 21 and the rear detection coil 22 in the differential probe 2 sense the change in the magnetic field and convert it into an electrical signal, which is then transmitted to the pulse magnetic field display terminal 6 through the lead wire;

[0030] Terminal processing steps: The pulse magnetic field display terminal 6 performs signal processing and displays the pulse magnetic field detected by the differential probe 2 as a curve on the pulse magnetic field display terminal 6.

[0031] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art will be able to make various modifications and improvements without departing from the principles of the present invention, and these modifications and improvements should also be considered to fall within the scope of protection of the present invention.

Claims

1. A general-purpose pulse magnetic field standard measuring instrument, characterized in that, The system includes a quartz skeleton, a differential induction probe, a flange, a high-frequency 4-core connector, and a pulse magnetic field display terminal. The quartz skeleton consists of an outer quartz tube and an inner quartz tube, with the inner tube fitted inside the outer tube. The inner surface of the outer tube is covered with a pure copper silver-plated shielding layer. The differential induction probe is positioned at the front end of the inner quartz tube. The quartz skeleton is fixedly connected to the bottom of the flange, which contains an insulating component. The top of the flange is sealed with an O-ring and fixedly connected to an aviation connector. The aviation connector is equipped with a high-frequency 4-core connector, which is connected to the pulse magnetic field display terminal via a cable. The differential induction probe senses changes in the pulse magnetic field, converts them into electrical signals, and transmits these signals through the quartz inner tube, insulating component, high-frequency 4-core connector, and cable to the pulse magnetic field display terminal for display.

2. The universal pulse magnetic field standard gauge according to claim 1, characterized in that, The differential sensing probe includes a front detection coil, a rear detection coil, and a limiting threshold. The front detection coil is formed by seamlessly winding enameled wire around the outer wall of the quartz inner tube. A limiting threshold is set on one side of the front detection coil. The rear detection coil is formed by seamlessly winding enameled wire on the outer wall of the quartz inner tube on the other side of the limiting threshold. The front detection coil and the rear detection coil are connected in series.

3. The universal pulse magnetic field standard gauge according to claim 2, characterized in that, The differential induction probe has built-in parameters, including a pulse magnetic field amplitude measurement range of 0.1T to 40T and a pulse magnetic field frequency measurement range of 100Hz to 100kHz.

4. A universal pulse magnetic field standard measuring instrument according to claim 2, characterized in that, The front and rear detection coils are equipped with leads, which are connected to the high-frequency 4-core connector through the insulator on the flange.

5. A general-purpose pulse magnetic field standard gauge according to claim 1 or 4, characterized in that, Both the inner and outer quartz tubes are hollow structures. The differential sensing probe is fixed to the end of the inner quartz tube. The lead wire connecting the differential sensing probe is fixed inside the inner quartz tube and is fixed by potting glue.

6. A universal pulse magnetic field standard measuring instrument according to claim 4, characterized in that, A pure copper silver-plated shielding layer is fixedly installed between the inner and outer quartz tubes. The pure copper silver-plated shielding layer covers the front detection coil, rear detection coil, and leads of the entire differential induction probe. The pure copper silver-plated shielding layer is shorted to the flange and fixed by the flange pressing.

7. A general-purpose pulse magnetic field standard gauge according to claim 4, characterized in that, The high-frequency 4-core connector outputs the electrical signals generated by the front and rear detection coils in the differential sensing probe. Two cores in the high-frequency 4-core connector form a group, which are connected to the two ends of the front detection coil and the two ends of the rear detection coil, respectively.

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