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Radiation field uniformity calibration positioner

A positioning device and uniformity technology, which is applied in the field of radiation field uniformity verification positioning device, can solve the problems of thick vertical connecting rods, uneven local field strength, and increased measurement uncertainty, so as to improve efficiency and simplify calibration Operation process, effect of reducing impact

Inactive Publication Date: 2014-06-25
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Common radiation field uniformity calibration and positioning devices, the electric field probe can only be adjusted up and down in the vertical direction, which is a one-dimensional positioning device. When changing the horizontal position of the electric field probe, the device needs to be moved as a whole and re-measured Positioning makes the positioning operation cumbersome, and it cannot ensure that the field strength probes at multiple horizontal positions are on the same plane, which will lead to poor repeatability of measurement results;
[0005] (2) Common radiation field uniformity calibration and positioning devices, vertical connecting rods generally use materials with low dielectric constants, such as PVC (Poly Vinyl Chloride, polyvinyl chloride), bakelite, wood and other insulating materials, and in order to meet the Strength requirements Vertical links are usually thicker
When the frequency in the test environment is high (such as above 1 GHz), the superimposed effect of electromagnetic wave incident and reflection causes the local field strength around the thicker vertical connecting rod to be uneven, due to the common radiation field uniformity verification positioning device The electric field probe is set on the vertical connecting rod, and the electric field probe is very close to the vertical connecting rod, so the electric field probes of the common radiation field uniformity verification positioning device cannot accurately reflect the actual field strength at the location, which increases the measurement uncertainty. Affect the measurement result

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Radiation field uniformity calibration positioning device, such as figure 2 As shown, it includes a vertical connecting rod 1, a bottom plate 2, a horizontal connecting rod 3, and a horizontal sleeve 4;

[0042] The bottom end of the vertical connecting rod 1 is fixed on the bottom plate 2;

[0043] The horizontal sleeve 4 is sleeved outside the vertical connecting rod 1 and can slide axially along the vertical connecting rod 1;

[0044] The horizontal sleeve 4 and / or the vertical connecting rod 1 are provided with an axial positioning mechanism (such as positioning holes, positioning pins, etc.) for the horizontal sleeve 4 to be axially positioned on the vertical connecting rod 1 fixed;

[0045] One end of the horizontal connecting rod 3 is fixed on the horizontal sleeve 4 and is perpendicular to the vertical connecting rod 1, and the other end is used for fixing the electric field probe 5;

[0046] The cross-sectional area of ​​the horizontal connecting rod 3 is s...

Embodiment 2

[0049] Radiation field uniformity calibration positioning device such as image 3 As shown, it includes a vertical connecting rod 1, a horizontal connecting rod 3, a horizontal sleeve 4, a vertical sleeve 7, a base sleeve 6, and a bottom plate 2;

[0050] The base sleeve 6 has a plurality of ( figure 2 4 in the middle), a plurality of base sleeves 6 are fixed on the base plate 2 in a straight line, the axis of each base sleeve 6 is perpendicular to the base plate 2, and the distance between the axes of two adjacent base sleeves 6 is equal;

[0051] The bottom end of the vertical link 1 is detachably accommodated and fixed in one of the base sleeves 6;

[0052] The vertical link 1 can be multi-segment ( image 3 The middle is two sections), and the multi-section vertical connecting rod 1 is connected and fixed by the vertical sleeve 7 to form the entire vertical connecting rod 1;

[0053]The distance from the electric field probe to the axis of the vertical connecting rod i...

Embodiment 3

[0060] Radiation field uniformity calibration positioning device such as Figure 5 As shown, it includes two vertical connecting rods 1, two base sleeves 6, two horizontal sleeves 4, a bottom plate 2, a horizontal connecting rod 3, and an electric field probe 5;

[0061] The two base sleeves 4 are respectively fixed on the base plate 2, and the axis of the base sleeve 2 is perpendicular to the base plate 2;

[0062] The bottom ends of the two vertical connecting rods 1 are respectively accommodated and fixed in the two base sleeves 4;

[0063] The vertical connecting rod 1 can be multi-segment ( Figure 5 The middle is two sections), and the multi-section vertical connecting rod is connected and fixed by the vertical sleeve 6 to form the entire vertical connecting rod 1;

[0064] The two horizontal sleeves 4 are respectively sleeved on the outside of the two vertical connecting rods 1, and can slide axially along the sleeved vertical connecting rods 1 respectively;

[0065]...

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Abstract

The invention discloses a radiation field uniformity calibration positioner, which comprises a vertical connected rod, a bottom plate, a horizontal connected rod and a horizontal sleeve; the bottom end of the vertical connected rod is fixed on the bottom plate; the horizontal sleeve is sleeved on the vertical connected rod, and can axially slide along the vertical connected rod; an axial positioning mechanism is arranged on the horizontal sleeve and / or the vertical connected rod, and is used for axially fixing the horizontal sleeve on the vertical connected rod; one end of the horizontal connected rod is fixed on the horizontal sleeve and is perpendicular to the vertical connected rod, and the other end of the horizontal connected rod is used for fixing an electric field probe; and the cross-sectional area of the horizontal connected rod is smaller than the cross-sectional area of the vertical connected rod. The radiation field uniformity calibration positioner can increase the accuracy of a radiation field uniformity test result and the efficiency and accuracy of radiation field uniformity calibration positioning operation.

Description

technical field [0001] The invention relates to electromagnetic compatibility test technology, in particular to a radiation field uniformity calibration and positioning device, which is used for characteristic parameter measurement of an anechoic chamber for electromagnetic compatibility test. Background technique [0002] The requirements for 16-point field uniformity verification are specified in the electromagnetic compatibility standard IEC61000-4-3 of the International Electrotechnical Commission: under the condition of the incidence of electromagnetic waves of a certain power, the figure 1 On 12 of the 16 points evenly distributed in the space plane shown, the difference in field strength measured by the electric field probe at any two points should be less than 6 decibels. [0003] The common radiation field uniformity calibration and positioning device is a single rod, including a vertical link and an electric field probe. The electric field probe is set on the verti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
Inventor 马欣邹子英陆敏龚增王晖张亮田禾箐
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH