CN213874652U - System for measuring three-dimensional space radiation pattern in plane coordinate system - Google Patents
System for measuring three-dimensional space radiation pattern in plane coordinate system Download PDFInfo
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- CN213874652U CN213874652U CN202022476353.2U CN202022476353U CN213874652U CN 213874652 U CN213874652 U CN 213874652U CN 202022476353 U CN202022476353 U CN 202022476353U CN 213874652 U CN213874652 U CN 213874652U
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Abstract
The utility model discloses a measure system of three-dimensional space radiation pattern in planar coordinate system, including test plane and fixed set up in support on the test plane and set up in signal source on the support, the test plane set up in under the signal source, on the test plane with the signal source orthographic projection point has been arranged a plurality of detectors on the concentric circles circular arc as the centre of a circle, scribble the material that has reflection characteristic on the test plane. The utility model provides a prior art's radiation pattern measurement system be based on the goniometer, and far field intensity is rotatory progressively carrying out progressively through Goniometer (GM) usually and is measured, and the operation is complicated, and measurement accuracy is not very ideal to the source that has narrow visual angle, and is difficult to realize technical problem such as multichannel data simultaneous acquisition.
Description
Technical Field
The utility model relates to an optical radiation directional diagram measures technical field, especially relates to a measure three-dimensional space radiation directional diagram's system in planar coordinate system.
Background
Radiation patterns are important tools for describing the dependence of the intensity of radio waves emitted by a signal source on the direction (angle), for example light from a lighting device or radio waves from an antenna. The radiation behavior can reflect the inherent characteristics of the source, so that the radiation behavior has a great influence on optimizing the system performance, and in applications such as antenna design, a radiation pattern with reconfigurable function is important for establishing different communication links.
Finite Difference Time Domain (FDTD) methods based on Maxwell's equations can be used for graphics generation of complex source structures (e.g., OLED/LED); a solution or approximate solution to the beam equation is also one way to provide a far field pattern; monte Carlo (MC) ray tracing is another method of simulating radiation patterns with high accuracy. In classical experiments, the method of obtaining the radiation pattern is based on a goniophotometer (G.M.), however, in any type of g.m., rotation is essential to measure the angular intensity variation in a spherical coordinate system, where the source is typically sampled in equal angular steps. The radiation pattern measuring technology is widely applied to the fields of agricultural planting, bioengineering, military radars, optical instrument detection, electromagnetic radiation prediction and the like.
The radiation pattern measuring system in the prior art is based on a goniophotometer, the far field intensity is generally measured step by step through the rotation of the Goniophotometer (GM), the operation is complex, the measuring precision is not ideal for the source with narrow viewing angle, and the simultaneous acquisition of multi-channel data is difficult to realize.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem who solves: the system for measuring the three-dimensional space radiation pattern in the plane coordinate system is provided, and the technical problems that the radiation pattern measuring system in the prior art is based on a goniometer, the far field intensity is usually measured step by step through the rotation of the Goniometer (GM), the operation is complex, the measuring precision is not ideal for a source with a narrow viewing angle, the simultaneous acquisition of multi-channel data is difficult to realize, and the like are solved.
In order to solve the technical problem, the utility model discloses a technical scheme does:
a system for measuring a three-dimensional space radiation directional diagram in a plane coordinate system comprises a test plane, a support fixedly arranged on the test plane and a signal source arranged on the support, wherein the test plane is arranged under the signal source, a plurality of detectors are arranged on a concentric circular arc on the test plane by taking a front projection point of the signal source as a circle center, and a material with a reflection characteristic is coated on the test plane.
Preferably, the detectors are respectively arranged on each single circular ring on the test plane at equal intervals, the number of the detectors on each circular ring is the same, and the detectors on all the circular rings are distributed along the same radial direction on the test plane.
Preferably, the distance between adjacent concentric circles is determined by an angle formed by the distance between the signal source and the center of the circle on the test plane and the distance between the signal source and the circular arc, and the adjacent concentric circular arcs sequentially increase by the same angle.
Preferably, the material having a reflective property is a black light absorbing material.
Preferably, the signal source is a light emitting diode, an incandescent lamp or a light emitting lamp tube.
Preferably, the detector arranged on the test plane is an optical detector.
Preferably, the distance between the signal source and the detector is more than five times of the output slot of the signal source.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses choose for use emitting diode (LED) as the light source, based on advantages such as its luminous efficacy is high, the consumption is little, longe-lived, with low costs, photochromic pure, the easy control installation.
The utility model discloses the low reflection characteristic material of test plane surface has good low reflection effect, has prevented the influence of light reflection to measuring result.
The utility model discloses a radiation pattern of each direction of accurate three-dimensional space, the rotatory operation of goniometer can be eliminated to the system of measuring three-dimensional space radiation pattern in the plane coordinate system.
The utility model discloses detector and signal source are all fixed, to the source that has narrow visual angle, can obtain accurate result.
The utility model discloses the test result of each position of three-dimensional space can be converted into to the data that the detector gathered on the test plane, has reduced the complexity of system.
The utility model discloses the detector that the test plane was arranged, multichannel data acquisition, very big reduction data acquisition's time.
The utility model relates to a brief, reasonable, practical. The problems that a radiation pattern measuring system in the prior art gradually measures based on the rotation of a goniometer, is complex to operate, has poor measuring precision for a source with a narrow viewing angle, is difficult to realize simultaneous acquisition of multi-channel data and the like are solved. The utility model provides high radiation pattern measuring accuracy and measuring efficiency, the cost is reduced has simplified test system, can facilitate for optics electromagnetic radiation intensity detects.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
A system for measuring a three-dimensional spatial radiation pattern in a planar coordinate system, comprising: the signal source 2 is fixed on the bracket 1; arranging a detector 4 on a concentric circular arc which takes a projection point of a top view of the signal source 2 as a circle center on a test plane 3 right below the signal source 2; coating a material with low reflection characteristic on a test plane where the detector 4 is arranged in advance; the other end of the bracket 1 is fixed on a test plane 3.
The detectors 4 are respectively and equidistantly arranged on each single circular ring on the test plane 3, the number of the detectors 4 on all the circular rings is the same, and the detectors 4 on all the circular rings are respectively distributed on the test plane 3 along the same radial direction.
Calculating the sampling positions of the detector 4 on the test plane 3 according to the preset measuring steps, measuring the radiation intensity at these positions, and passing the corresponding angle factor cos-3The theta term is further mapped back to a three-dimensional spatial sphere.
The material with low reflection characteristic coated on the test plane 3 is a black light absorption material to prevent the test plane 3 from reflecting light and the test result is inaccurate.
The distance between the adjacent concentric circles is determined by the angle formed by the distance between the signal source 2 and the circle center on the test plane 3 and the distance between the signal source 2 and the circular arc, and the same angle is sequentially added to the adjacent concentric circular arcs, so that the tested data can be conveniently counted and processed.
The bracket 1 supports a fixed signal source 2, and the signal source 2 is a light emitting diode, an incandescent lamp or a light emitting lamp tube.
The detector 4 arranged on the test plane 3 is an optical detector.
The distance between the signal source 2 to be detected and the detector 4 needs to be more than five times of the output slot of the signal source 2.
The system for measuring the three-dimensional space radiation pattern in the plane coordinate system can optimize and improve the system by adjusting the arrangement interval of the detectors on the test plane and the angle between the detectors and the signal source according to the actual condition.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (7)
1. A system for measuring a three-dimensional spatial radiation pattern in a planar coordinate system, comprising a test plane (3) and a support (1) fixedly arranged on said test plane (3) and a signal source (2) arranged on said support (1), characterized in that: the testing plane (3) is arranged under the signal source (2), a plurality of detectors (4) are arranged on a concentric circular arc on the testing plane (3) by taking the orthographic projection point of the signal source (2) as the center of a circle, and a material with reflection property is coated on the testing plane (3).
2. The system for measuring a three-dimensional spatial radiation pattern in a planar coordinate system of claim 1, wherein: the detectors (4) are respectively arranged on each single circular ring on the test plane (3) at equal intervals, the number of the detectors (4) on each circular ring is the same, and the detectors (4) on all the circular rings are distributed on the test plane (3) along the same radial direction.
3. A system for measuring a three-dimensional spatial radiation pattern in a planar coordinate system as defined in claim 1 or 2 wherein: the distance between the adjacent concentric circles is determined by the angle formed by the distance between the signal source (2) and the circle center on the test plane (3) and the distance between the signal source (2) and the circular arc, and the adjacent concentric circular arcs are sequentially increased by the same angle.
4. The system for measuring a three-dimensional spatial radiation pattern in a planar coordinate system of claim 1, wherein: the material with the reflection characteristic is a black light absorption material.
5. The system for measuring a three-dimensional spatial radiation pattern in a planar coordinate system of claim 1, wherein: the signal source (2) is a light emitting diode, an incandescent lamp or a light emitting lamp tube.
6. The system for measuring a three-dimensional spatial radiation pattern in a planar coordinate system of claim 1, wherein: the detector (4) arranged on the test plane (3) is an optical detector.
7. The system for measuring a three-dimensional spatial radiation pattern in a planar coordinate system of claim 1, wherein: the distance between the signal source (2) and the detector (4) is more than five times of the output slot of the signal source (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022476353.2U CN213874652U (en) | 2020-11-01 | 2020-11-01 | System for measuring three-dimensional space radiation pattern in plane coordinate system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022476353.2U CN213874652U (en) | 2020-11-01 | 2020-11-01 | System for measuring three-dimensional space radiation pattern in plane coordinate system |
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| CN213874652U true CN213874652U (en) | 2021-08-03 |
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