CN201716018U - Distance measuring device - Google Patents

Abstract

The utility model provides a distance measuring device, including first and second calibration elements, first to fourth laser light sources and an angle adjustment element. The first laser light source is arranged on the first calibration element. The first laser light source emits light along a first axis perpendicular to a reference plane to the phase midpoint of the first antenna. The second laser light source is arranged on the first calibration element. The second laser light source emits light along the first axis to a first position on the reference plane. The third laser light source is arranged on the second calibration element. The third laser light source emits light along a second axis perpendicular to the reference plane to the phase midpoint of the second antenna. The angle adjustment element is pivotally mounted on the second calibration element. The fourth laser light source is arranged on the angle adjustment element. The fourth laser light source emits light along the third axis to the first position on the reference plane.

Description

distance measuring device

technical field

The utility model relates to a measuring device, in particular to a distance measuring device.

Background technique

Among the evaluation standards of various electronic products, for example, personal computers, televisions, stereos and other audio-visual appliances, electromagnetic compatibility (EMC) is a key quality indicator. Since the signal transmission speed of the electronic device is getting faster and faster, the electromagnetic interference caused by the electronic components disposed inside the electronic device will be more serious, and then affect the normal operation of the electronic device. Therefore, in modern advanced countries, the evaluation report of electromagnetic compatibility has been paid more and more attention.

The method of measuring EMC is based on the specifications published by the International Electrotechnical Commission (IEC) as a reference. This specification states that the far-field test standard is to measure the electromagnetic wave field of the object under test at a distance of 10 meters from the object under test. strong value. The test equipment needs to include antennas for transmitting and receiving electromagnetic waves respectively. When testing, the two antennas need to be positioned so that there is a specific distance between the two antennas to meet the specification. If the calibration is performed by manually measuring the distance between the two antennas with a meter stick, the problem of inaccurate measurement is likely to occur.

Utility model content

The utility model provides a distance measuring device, which can accurately measure the distance between two antennas.

The utility model provides a distance measuring device, which is suitable for calibrating the distance between the first antenna and the second antenna. The distance measuring device includes a first calibration component, a first laser light source, a second laser light source, a second calibration component, a third laser light source, an angle adjustment component and a fourth laser light source. The first laser light source is arranged on the first calibration element, wherein the first laser light source emits light along a first axis perpendicular to the reference plane to the midpoint of the phase of the first antenna. The second laser light source is arranged on the first calibration component, wherein the second laser light source emits light along the first axis to a first position on the reference plane. The third laser light source is arranged on the second calibration element, wherein the third laser light source emits light along the second axis perpendicular to the reference plane to the phase midpoint of the second antenna. The angle adjustment component is pivotally arranged on the second calibration component. The fourth laser light source is arranged on the angle adjustment component, wherein the fourth laser light source emits light along the third axis to the first position on the reference plane.

In an embodiment of the present invention, the distance measuring device further includes a fifth laser light source and a sixth laser light source. The fifth laser light source is disposed on the first calibration component, wherein the fifth laser light source emits light to a second position on the first antenna along a fourth axis perpendicular to the reference plane. The sixth laser light source is arranged on the second calibration element, wherein the sixth laser light source emits light along the fifth axis perpendicular to the reference plane to the third position on the second antenna, the phase midpoint of the first antenna, the phase of the second antenna The midpoint, the second location, and the third location are collinear.

In an embodiment of the present invention, the above-mentioned first calibration component has a light source carrying structure, wherein the first laser light source and the second laser light source are respectively arranged on opposite sides of the light source carrying structure.

In an embodiment of the present invention, the above-mentioned angle adjustment element is pivotally connected to the second alignment element along a rotation shaft, and the rotation shaft passes through and is perpendicular to the second axis.

In an embodiment of the present invention, the above-mentioned rotating shaft passes through and is perpendicular to the third axis.

Based on the above, the angle adjusting component of the present invention can be configured at a specific position on the second calibration component, so that there is a specific distance between the angle adjusting component and the reference plane. The angle adjustment element can pivot relative to the second calibration element to adjust the angle between the light emitted by the fourth laser light source and the reference plane. In the case where the specific distance and included angle are known, the distance between the first axis and the second axis can be calculated by trigonometric functions, and the first axis and the second axis can be respectively aligned with the phases of the first antenna The midpoint and the phase midpoint of the second antenna, so as to accurately adjust the distance between the phase midpoint of the first antenna and the phase midpoint of the second antenna to a correct value.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a distance measuring device according to an embodiment of the present invention.

Reference signs:

50: first antenna; 52, 62: phase midpoint; 60: second antenna;

100: distance measuring device; 110: first calibration element; 112: light source bearing structure;

120: the second calibration element; 130: the first laser light source; 140: the second laser light source;

150: third laser light source; 160: fourth laser light source; 170: angle adjustment element;

180: fifth laser light source; 190: sixth laser light source; A1: first axis;

A2: second axis; A3: third axis; A4: fourth axis;

A5: fifth axis; A6: rotating shaft; D1, D2: distance;

L1: first position; L2: second position; L3: third position;

P: reference plane; θ: included angle.

Detailed ways

FIG. 1 is a schematic diagram of a distance measuring device according to an embodiment of the present invention. Please refer to FIG. 1 , the distance measurement device 100 of this embodiment is suitable for calibrating the distance between the first antenna 50 and the second antenna 60 . The first antenna 50 and the second antenna 60 are, for example, antennas respectively used for transmitting and receiving electromagnetic waves in an electromagnetic compatibility (EMC) test. The distance measuring device 100 includes a first calibration component 110 , a second calibration component 120 , a first laser light source 130 , a second laser light source 140 , a third laser light source 150 , a fourth laser light source 160 and an angle adjustment component 170 .

The first laser light source 130 is disposed on the first calibration element 110 , wherein the first laser light source 130 emits light along the first axis A1 perpendicular to the reference plane P to the phase midpoint 52 of the first antenna 50 . The second laser light source 140 is disposed on the first calibration component 110 , wherein the second laser light source 140 emits light to a first position L1 on the reference plane P along the first axis A1 . The third laser light source 150 is disposed on the second calibration element 120 , wherein the third laser light source 150 emits light along the second axis A2 perpendicular to the reference plane P to the phase midpoint 62 of the second antenna 60 . The angle adjustment component 170 is pivotally disposed on the second calibration component 120 . The fourth laser light source 160 is disposed on the angle adjustment component 170 , wherein the fourth laser light source 160 emits light to the first position L1 on the reference plane P along the third axis A3 .

Through the above configuration, the distance between the phase midpoint 52 of the first antenna 50 and the phase midpoint 62 of the second antenna 60 can be corrected. For example, after the user places the first antenna 50 and the second antenna 60 on the reference plane P, the first calibration element 110 and the second calibration element 120 can be placed in the positions shown in FIG. The light emitted by a laser light source 130 (coinciding with the first axis A1) is aligned with the phase midpoint 52 of the first antenna 50, and the light emitted by the third laser light source 150 (coincided with the second axis A2) is aligned with the second antenna The phase midpoint of 60 is 62.

Next, rotate the angle adjustment element 170 relative to the second calibration element 120 to adjust the light output direction of the fourth laser light source 160, so that the light emitted by the fourth laser light source 160 (coincident with the third axis A3) is aligned with the first on the reference plane P. A location L1. Since the included angle θ between the second axis A2 and the third axis A3 can be obtained from the angle of rotation of the angle adjustment element 170 relative to the second calibration element 120, and the position of the angle adjustment element 170 (the second axis A2 and the third axis The distance D1 between the intersection point of A3) and the reference plane P can be determined by the configuration position of the angle adjustment element 170, so the distance D2 between the phase midpoint 52 of the first antenna 50 and the phase midpoint 62 of the second antenna 60 (The distance between the first axis A1 and the second axis A2) can be calculated by trigonometric functions. The calculation formula is, for example, tanθ=D2/D1.

At this time, if the distance D2 between the phase midpoint 52 of the first antenna 50 and the phase midpoint 62 of the second antenna 60 is the correct value (for example, 10 meters) expected by the user, then the distance between the first antenna 50 and the second antenna 60 can be The second antenna 60 starts to perform an electromagnetic compatibility (electromagnetic compatibility, EMC) test. On the other hand, if the distance D2 between the phase midpoint 52 of the first antenna 50 and the phase midpoint 62 of the second antenna 60 is not the correct value expected by the user, the first antenna 50 and the second antenna 60 can be adjusted. and correspondingly adjust the position of the first calibration component 110 , the position of the second calibration component 120 and the pivoting angle of the angle adjustment component 170 until the calculated distance D2 is the correct value expected by the user.

Of course, the user can also adjust the phase of the first antenna 50 after determining that the distance D2 obtained by the position of the first calibration component 110, the position of the second calibration component 120, and the pivot angle of the angle adjustment component 170 is correct. The midpoint 52 is aligned with the light emitted by the first laser light source 130, and the phase midpoint 62 of the second antenna 60 is aligned with the light emitted by the third laser light source 150 to determine the phase midpoint 52 of the first antenna 50 and the second The distance between the phase midpoints 62 of the antenna 60 is the correct value expected by the user.

In detail, in this embodiment, the distance measuring device 100 further includes a fifth laser light source 180 and a sixth laser light source 190 . The fifth laser light source 180 is disposed on the first calibration component 110 , wherein the fifth laser light source 180 emits light along a fourth axis A4 perpendicular to the reference plane P to a second position L2 on the first antenna 50 . The sixth laser light source 190 is disposed on the second calibration component 120 , wherein the sixth laser light source 190 emits light along a fifth axis A5 perpendicular to the reference plane P to a third position L3 on the second antenna 60 . Through the positioning of the light emitted by the first laser light source 130, the third laser light source 150, the fifth laser light source 180, and the sixth laser light source 190, the phase midpoint 52 of the first antenna 50 and the phase midpoint of the second antenna 60 62. The second position L2 and the third position L3 are controlled to be collinear, which can ensure that the first antenna 50 and the second antenna 60 face each other.

In more detail, in this embodiment, the first calibration component 110 has a light source carrying structure 112, and the first laser light source 130 and the second laser light source 140 are respectively arranged on opposite sides of the light source carrying structure 112, so as to be aligned along the first axis. A1 irradiates to the phase midpoint 52 of the first antenna 50 and the first position L1 on the reference plane P respectively in opposite directions.

In addition, the angle adjustment element 170 of this embodiment is pivotally connected to the second alignment element 120 along the rotation axis A6, wherein the rotation axis A6 passes through the second axis A2 and is perpendicular to the second axis A2, and the rotation axis A6 passes through the third axis A3 and is perpendicular to the third axis A3. In this way, the distance between the axis center of the angle adjustment element 170 and the reference plane P is the distance D1, and the angle between the angle adjustment element 170 and the second calibration element 120 is the second axis A2 and the third axis A2. The included angle θ between the axes A3 makes it easier to obtain the distance D1 and the included angle θ.

To sum up, the angle adjustment component of the present invention can be configured at a specific position on the second calibration component, so that there is a specific distance between the angle adjustment component and the reference plane. The angle adjustment element can pivot relative to the second calibration element to adjust the angle between the light emitted by the fourth laser light source and the reference plane. In the case where the specific distance and included angle are known, the distance between the first axis and the second axis can be calculated by trigonometric functions, and the first axis and the second axis can be respectively aligned with the phases of the first antenna The midpoint and the phase midpoint of the second antenna, so as to accurately adjust the distance between the phase midpoint of the first antenna and the phase midpoint of the second antenna to a correct value. In addition, through the positioning of the light rays emitted by the first laser light source, the third laser light source, the fifth laser light source and the sixth laser light source, the phase midpoint of the first antenna, the phase midpoint of the second antenna, and the The second position and the third position on the second line are controlled to be collinear, which can ensure that the first antenna and the second antenna face each other.

Although the utility model has been disclosed as above with the embodiments, it is not intended to limit the utility model. Any person skilled in the art may make some modifications and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the present utility model should be determined by the scope defined in the claims.

Claims (5)

1. a distance measuring device is suitable for the distance between one first antenna and one second antenna is calibrated, and this distance measuring device comprises:

One first calibrating element;

One first LASER Light Source is disposed at this first calibrating element, and wherein this first LASER Light Source emits beam to the phase place mid point of this first antenna along the first axle perpendicular to reference planes;

One second LASER Light Source is disposed at this first calibrating element, and wherein this second LASER Light Source is along emit beam a primary importance to these reference planes of this first axle;

One second calibrating element;

One the 3rd LASER Light Source is disposed at this second calibrating element, and wherein the 3rd LASER Light Source emits beam to the phase place mid point of this second antenna along one second axis perpendicular to these reference planes;

One angular setting element is hubbed at this second calibrating element;

And one the 4th LASER Light Source, be disposed at this angular setting element, wherein the 4th LASER Light Source is along emit beam this primary importance to these reference planes of one the 3rd axis.

2. distance measuring device according to claim 1 is characterized in that, more comprises:

One the 5th LASER Light Source is disposed at this first calibrating element, and wherein the 5th LASER Light Source is along a second place that emits beam perpendicular to a four axistyle of these reference planes to this first antenna;

And one the 6th LASER Light Source, be disposed at this second calibrating element, wherein the 6th LASER Light Source is along one the 3rd position that emits beam perpendicular to one the 5th axis of these reference planes to this second antenna, the phase place mid point of this first antenna, the phase place mid point of this second antenna, this second place and the 3rd position conllinear.

3. distance measuring device according to claim 1 is characterized in that, wherein this first calibrating element has a light source loading structure, and wherein this first LASER Light Source and this second LASER Light Source are disposed at the relative both sides of this light source loading structure respectively.

4. distance measuring device according to claim 1 is characterized in that, wherein this angular setting element is articulated in this second calibrating element along a rotating shaft, this rotating shaft by and vertical this second axis.

5. distance measuring device according to claim 4 is characterized in that, wherein this rotating shaft by and vertical the 3rd axis.

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