CN201166698Y - Detector for measuring pulse intense magnetic field - Google Patents

Abstract

The utility model relates to a pulsed high magnetic field measuring detector, which is characterized in that the detector comprises a detecting coil brace, a detecting coil and an outer protective sheath. The detecting coil is wound on the groove of the detecting coil brace and then sealed in the outer protective sheath, and the detecting coil is a single-layer pick-up field detecting coil, the diameter of the copper wire thereof is 0.01-0.5 mm. through the pulsed high magnetic field measuring detector, the pulsed magnetic field with the magnetic field intensity up to 100T can be accurately measured, the operation is convenient, the structure is simple, and the detector is safe and reliable.

Description

Impulse magnetic field is measured detector

Technical field

The utility model is a sensor of accurately surveying the each point magnetic field intensity under the impulse magnetic field condition.

Background technology

At present, the measuring method of magnetic field intensity mainly is an inductive electromagnetic method.Under the steady magnetic field, be the vibration by coil, cutting magnetic induction line produces induced voltage; Perhaps adopt methods such as Hall and nuclear magnetic resonance to measure magnetic field intensity.According to the characteristics (rate of change of magnetic is big, and magnetic field intensity is higher) of impulse magnetic field and pulse magnet, intensity and distribution that general steady state measurement method can not the correct measurement pulsed magnetic field, thereby must development be fit to the detection of magnetic field sensor of impulse magnetic field.

Summary of the invention

The purpose of this utility model is the design feature according to Pulsed High Field Magnets, provides the impulse magnetic field under a kind of suitable pulsed field condition to measure detector, and this detector can accurately be measured the magnetic field of high magnetic field intensity and high rate of change.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of impulse magnetic field is measured detector; it is characterized in that: it comprises detecting coil support, detecting coil and outer jointing jacket; detecting coil is on the groove of detecting coil support; be sealed in the outer jointing jacket then; detecting coil is an individual layer pick-up field detecting coil, the line footpath 0.01-0.5mm of its copper cash.

Principle of the present utility model is: pick-up field coil method is also referred to as inductive electromagnetic method.Promptly by the induced voltage signal that is produced in the pick-up field coil is analyzed, thereby can know the size of the magnetic field intensity of measurement.

According to Faraday's electromagnetic induction law, pick-up field detecting coil is placed time dependent pulsed magnetic field, the induced voltage that produces in it is: $\mathrm{Ui}\left(t\right)=-S\frac{\mathrm{dB}}{\mathrm{dt}}---\left(1\right)$

In following formula, S is the useful area of pick-up field detecting coil.If the detecting coil number of turn is N, cross-sectional area is A, when its parallel axes during in magnetic field, has

S＝NA+Sa (2)

Wherein, Sa is for connecting (except that the detecting coil of the pick-up field) area that causes by lead and lead.If coiling is an individual layer pick-up field detecting coil, and the line of employed copper cash footpath is very little, and Sa can ignore, then S=NA.

τ is that impulse magnetic field reaches the used time of peak value B (the pulse starting point is designated as time zero) if make, and then has

$B=-\frac{{\∫}_0^{\mathrm{\τ}}\mathrm{Ui}\left(t\right)\mathrm{dt}}{S}---\left(3\right)$

Hence one can see that, by field detecting coil useful area is carried out rationally, demarcates (demarcating by standard magnet) accurately, can be by induced voltage is carried out the magnetic field intensity that integration obtains measuring.

The beneficial effects of the utility model are accurately to measure the pulsed magnetic field of magnetic field intensity up to 100T, and are easy to operate, simple in structure and safe and reliable.

Description of drawings

Fig. 1 is that the impulse magnetic field of the utility model embodiment is measured the panel detector structure synoptic diagram.

Fig. 2 is the detecting coil supporting structure synoptic diagram among Fig. 1.

Fig. 3 is a detecting coil position view among Fig. 1.

Embodiment

Below in conjunction with drawings and Examples the utility model is described further.

The explanation of mark among Fig. 1: 1-detecting coil; 2-detecting coil support; The 3-outer jointing jacket; The 4-signal lead.

Referring to Fig. 1; the impulse magnetic field of the utility model embodiment is measured detector; it comprises detecting coil support 2, detecting coil 1 and outer jointing jacket 3; detecting coil 2 is on the groove of detecting coil support 1; be sealed in then in the outer jointing jacket 3; detecting coil 2 is individual layer pick-up field detecting coils, line footpath 0.05mm or the 0.2mm or the 0.5mm of its copper cash.

Referring to Fig. 2, utilize detecting coil support 2 of nonmagnetic substance processing, the size of detecting coil support 2 can be regulated according to characteristics such as magnetic-field measurement scope, intensity.

Press the position of Fig. 3 detecting coil detecting coil 1 is installed, fixed, seal by Fig. 1 then.

The detector of installing, debugging is good is placed magnetic field to be tested,, just can obtain the magnetic field size of tested point again according to integral relation (3) by measurement signal voltages.

Advantage of the present utility model and good effect are:

1) can accurately measure magnetic field intensity up to the pulsed magnetic field of 100T;

²⁾Simple in structure and safe and reliable;

3) easy to operate.

Claims (1)

1, a kind of impulse magnetic field is measured detector; it is characterized in that: it comprises detecting coil support, detecting coil and outer jointing jacket; detecting coil is on the groove of detecting coil support; be sealed in the outer jointing jacket then; detecting coil is an individual layer pick-up field detecting coil, the line footpath 0.01-0.5mm of its copper cash.

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