CN102284858A - Method for quickly adjusting orthogonal analog disc surface of radar to make orthogonal analog disc surface vertical to pitch axis - Google Patents

Abstract

The invention relates to a method for quickly adjusting an orthogonal analog disc surface of a radar to make the orthogonal analog disc surface vertical to a pitch axis, which is used for quickly adjusting the orthogonal analog disc surface to make the orthogonal analog disc surface vertical to the pitch axis in the process of assembling and manufacturing the radar. The method comprises the following steps of: (1) setting initial conditions such as a rotation direction, a rotation angle, related sizes, and the initial positions and a corresponding relation of three nuts and three dial indicators; and (2) making the orthogonal analog disc surface vertical to the pitch axis by adjusting the positions of the nuts, namely rotating the dial indicators a theta angle from the initial positions, and reading the change values of the dial indicators; substituting the corresponding parameters and the change values of the dial indicators into an equation set to solve the adjusted quantity of two nuts; and adjusting the two nuts according to the calculated adjusted quantity. An adjusted target value is directly calculated according to data, subjective judgment difference is reduced, and the consistency of an adjusted result is improved.

Description

The vertical rapid adjustment method of radar orthogonal simulation card with pitch axis

Technical field

The present invention relates to the orthogonal measuring method in the field of mechanical technique, be specifically related to radar in the assembling manufacture process, its orthogonal simulation card rapid adjustment is to a kind of method vertical with pitch axis.

Technical background

In the radar assembling process, the orthogonality of pitch axis and azimuth axis is generally the project of must surveying, and this is that the pitch axis rotation can cause the angle error of radar because under pitch axis and azimuth axis off plumb situation.The orthogonal measuring method is divided into mechanical measurement and optical measurement, and the present invention is applicable to mechanical measurement.Mechanical measurement as shown in Figure 1, the simulation card of high accuracy processing by keyset with antenna pedestal link to each other (standing part), test bracket links to each other with pitch axis (motion parts), fixes three dial gauges (120 ° of circumferencial directions are uniform) on the test bracket, is pressed on the simulation card.By three adjusting nut adjustment simulation card attitudes, three dial gauge readings variations reach permissible value when making the pitch axis rotation during adjustment, and it is promptly vertical with the pitching rotation then to simulate card.On the simulation card frame level is installed then, the horizontal bubble on the frame level has just reflected the levelness of pitching rotation like this, can obtain quadrature error by calculating.

The adjustment of simulation card is the basis of orthogonal measuring process, has determined certainty of measurement and has measured efficient.Other unit method preferably not in the adjustment of simulation card, similar substantially with the method for my institute: 1) frock is installed after, pitch axis goes to a side backstop, each dial gauge is transferred to zero, the rotary luffing axle is to opposite side backstop; 2) observe each dial gauge reading and change, judge the height of card; 3), make the card trend vertical according to the nut of judged result adjusting lower or eminence; 4) repeat above-mentioned three steps, until meeting the demands.

This shows that this method mainly exists following problem:

1) directiveness of method is not strong, adjusts too blindly; 2) operation easier is bigger, and operator's experience level is required height, is not suitable for promoting; 3) adjustment efficient is low, and human factor is big, and unstable;

Summary of the invention

Above-mentioned technical problem in view of known method exists the purpose of this invention is to provide the vertical fast adjustment method with pitch axis of a kind of radar orthogonal simulation card, to solve in esse problem in the engineering.

The vertical rapid adjustment method with pitch axis of radar orthogonal simulation card of the present invention is to be hardware foundation with the orthogonal measuring frock, and common dial gauge is a survey tool, and the principle method of its adjustment is as follows:

1) the vertical principle of adjusting of simulation card with pitch axis

If three nuts are respectively first nut, second nut, the 3rd nut on the orthogonal measuring technological equipment, the initial position of dial gauge and simulation card contact point is on the adjusting nut and the card line of centres, be made as a, b, c respectively, corresponding with first nut, second nut, the 3rd nut, after pitch axis clockwise rotates angle θ, dial gauge arrives reposition, is made as a ', b ', c ' respectively, sees Fig. 2.

Suppose to exist a desirable vertical plane, by regulating the first nut center, and vertical, so, adjust target and just can be defined as: will simulate card and adjust to overlap and get final product with desirable vertical plane with pitch axis.Method of adjustment is: with first nut is the fixed support point, and other two nuts are adjusted respectively.

2) the nut adjustment is to the influence of each dial gauge contact point

The hypothetical simulation card is a rigid body, all can cause the displacement of each contact point when then adjusting second nut or the 3rd nut.If first nut, second nut, place, the 3rd nut center circular diameter are 2m, dial gauge contact point a, b, c place circular diameter are 2n, make a concrete analysis of below.

A) influence of second nut adjustment generation

If second nut descends or rises, the simulation card can be around first nut, the rotation of the 3rd nut line, and Fig. 3 is the A-A cutaway view of Fig. 2, and each point is the subpoint of each contact point on the vertical plane of first nut, the 3rd nut line before and after dial gauge rotates among the figure.

With reference to Fig. 2 and Fig. 3, suppose the second nut decline X respectively ₂, the displacement of calculating relevant position by geometrical relationship is as follows:

$\mathrm{\Δb}=\frac{n+m/2}{3m/2}{X}_2---\left(1\right)$

$\mathrm{\Δa}=\mathrm{\Δc}=\frac{(m-n)/2}{3m/2}{X}_2---\left(4\right)$

B) influence of the 3rd nut adjustment generation

If the 3rd nut descends or rises, the adjustment dish can be around the rotation of the first and second nut lines, and Fig. 4 is the B-B cutaway view, and each point is the subpoint of each contact point on the vertical plane of the first and second nut lines before and after dial gauge rotates among the figure.

With reference to Fig. 2 and Fig. 4, suppose the 3rd nut decline X respectively ₃, the displacement of calculating relevant position by geometrical relationship is as follows:

$\mathrm{\δc}=\frac{n+m/2}{3m/2}{X}_3---\left(6\right)$

$\mathrm{\δa}=\mathrm{\δb}=\frac{(m-n)/2}{3m/2}{X}_3---\left(9\right)$

3) vertically adjusting desired value calculates

Be located at second nut and adjusted X ₂, the 3rd nut has been adjusted X ₃Afterwards, the orthogonal simulation card is vertical with pitch axis, and at this moment a and a ', b and b ' have just dropped on the desirable vertical plane.At this moment, the displacement that a, a ', b, b ' are 4 is respectively Δ a+ δ a, Δ a '+δ a ', Δ b+ δ b ', Δ b '+δ b ', and the position of a, a ', b, 4 relative ideal vertical planes of b ' is respectively D when establishing initial position _a, D _{A '}, D _b, D _{B '}, then set up following equation:

Δa+δa+D _a＝Δa′+δa′+D _a′ (11)

Δb+δb+D _b＝Δb′+δb′+D _b′ (12)

And the relative displacement before and after the dial gauge rotation is respectively:

R _a′a＝D _a′-D _a (13)

R _b′b＝D _b′-D _b (14)

Therefore aggregative formula (11) (12) (13) (14) can get equation group

$\left\{\begin{array}{c}\mathrm{\Δa}+\mathrm{\δa}=\mathrm{\Δ}{a}^{\′}+\mathrm{\δ}{a}^{\′}+R_{a^{\′}a}\\ \mathrm{\Δb}+\mathrm{\δb}=\mathrm{\Δ}{b}^{\′}+\mathrm{\δ}{b}^{\′}+R_{b^{\′}b}\end{array}\right.---\left(15\right)$

Formula (1) (2) (3) (4) (7) (9) (10) difference substitution equation group (15) is got

$\left\{\begin{array}{c}[2\sin (150-\mathrm{\&theta;})-1]X_3-[1+2\cos (120-\mathrm{\&theta;})]X_2=3m{R}_{a^{\&prime;}a}/n\\ 2[1-\sin (90-\mathrm{\&theta;})]X_2-[1+2\cos (120-\mathrm{\&theta;})]{\mathrm{<figure-callout\; id="3"\; label="X"\; filenames="DEST\_PATH\_HSB00000656137600022.png"\; state="\{\{state\}\}">X</figure-callout>}}_3=3m{R}_{b^{\&prime;}b}/n\end{array}\right.---\left(16\right)$

Can solve X according to equation group (16) ₂, X ₃

Therefore in actual applications, following following steps can be adjusted to the simulation card vertical with pitch axis smoothly:

1) primary condition is set, as direction of rotation and the anglec of rotation, relative dimensions, nut of being used to regulate etc.

2) adjust:

A. after from initial position dial gauge being rotated the θ degree, read the dial gauge changing value.

B. with relevant parameter and dial gauge changing value substitution equation group (16), can solve the adjustment amount of two definite adjusting nuts.

C. adjust nut, make it reach the adjustment amount that calculates respectively, then adjust and finish.

To compare beneficial effect of the present invention as follows with existing method:

1. adjust desired value and directly calculate, reduced the subjective judgement otherness, improved adjustment uniformity as a result according to data.

2. follow-up adjustment is simple and convenient.

3. less demanding to personnel's level, workable.

Description of drawings

Fig. 1 orthogonality instrumentation plan

The position of each point relation on Fig. 2 frock

The A-A diagrammatic cross-sectional view of Fig. 3 Fig. 2, a wherein, the c point overlaps

The B-B diagrammatic cross-sectional view of Fig. 4 Fig. 2, a wherein, the b point overlaps

The specific embodiment

The present invention to the be embodied as example vertical with pitch axis, illustrates technical scheme of the present invention with orthogonal simulation card rapid adjustment in certain radar antenna base assembling process.

This radar antenna base must be adjusted to the orthogonal simulation card vertical with pitch axis in assembling process.With reference to the accompanying drawings 1, before the adjustment, at first the orthogonal measuring frock is being installed on the radar antenna base, dial gauge is installed then.

1. setting primary condition:

Three nut numberings are respectively 1,2,3 on the orthogonal measuring technological equipment, the dial gauge initial position is on the nut and the card line of centres, be respectively a, b, c, corresponding with first nut 1, second nut 2, the 3rd nut 3, after pitch axis clockwise rotates 97 °, dial gauge arrives reposition, is respectively a ', b ', c '.Place, the center circular diameter of three nuts is 380mm, and dial gauge contact point a, b, c place circular diameter are 330m.

Determine to adjust second nut 2, the 3rd nut 3, monitor second nut, 2 adjustment amounts by the dial gauge of a ' some position, the dial gauge of b ' some position is monitored the 3rd nut 3 adjustment amounts.

With initial parameter substitution equation group (16), solve:

$\left\{\begin{array}{c}{X}_2=-(0.306R_{b^{\&prime;}b}+1.457R_{a^{\&prime;}a})\\ {\mathrm{<figure-callout\; id="3"\; label="X"\; filenames="DEST\_PATH\_HSB00000656137600022.png"\; state="\{\{state\}\}">X</figure-callout>}}_3=-(1.457R_{b^{\&prime;}b}+1.156R_{a^{\&prime;}a})\end{array}\right.$

Can't accurately know adjustment numerical value when practical operation second nut 2, the 3rd nut 3, need use dial gauge and monitor.Can utilize calculating formula (2) and (7) to calculate.When adjusting second nut 2,, illustrate that then second nut, 2 adjustment amounts reach X when a ' some dial gauge value of reading variable quantity is Δ a ' ₂When adjusting the 3rd nut 3,, illustrate that the 3rd nut 3 adjustment amounts have reached X when b ' some dial gauge value of reading variable quantity is δ b ' ₃

Utilize formula (2) and formula (7), solve the monitoring value respectively

Δa′＝0.866X ₂

δb′＝0.866X ₃。

2. adjust:

1) the orthogonal measuring frock is installed, respectively three dial gauges are placed in the original position that turns clockwise (left backstop place) on the line of pitch axis center and three adjustment nuts, optional nut is made as first nut 1, and remaining two nut is followed successively by second nut 2, the 3rd nut 3 clockwise; Corresponding dial gauge is respectively a, b, c;

2) with the zeroing of dial gauge numerical value, the dial gauge that turns clockwise until right stop dog position, reads a ', b ' dial gauge numerical value R respectively on this position _{A ' a}, R _{B ' b}(the dial gauge compaction direction is a negative value);

3) the above-mentioned formula of above two numerical value substitutions is got X ₂, X ₃, and monitoring value Δ a ', δ b ';

4) adjust: adjust nut in new position according to dial gauge monitoring value sign symbol, when adjusting second nut 2, when a ' some dial gauge value of reading variable quantity is | and Δ a ' |, illustrate that then second nut, 2 adjustment amounts reach X ₂When adjusting the 3rd nut 3, when b ' some dial gauge value of reading variable quantity is | δ b ' |, illustrate that the 3rd nut 3 adjustment amounts have reached X ₃

Claims (3)

1. the vertical rapid adjustment method of radar orthogonal simulation card with pitch axis, with the orthogonal measuring frock is hardware foundation, dial gauge is a survey tool, the orthogonal measuring frock is installed on the radar antenna base, the orthogonal simulation card links to each other with the antenna pedestal by keyset, and test bracket links to each other with pitch axis, uniform three dial gauges on the circumference of test bracket, be pressed on the orthogonal simulation card, it is characterized in that: it is as follows that radar orthogonal simulation card is adjusted to vertical step with pitch axis:

[1] sets primary condition, if three nuts are respectively first nut (1) on the orthogonal measuring technological equipment, second nut (2), the 3rd nut (3), the initial position of dial gauge and simulation card contact point is on the adjusting nut and the card line of centres, be made as a respectively, b, c, with first nut (1), second nut (2), the 3rd nut (3) correspondence, after pitch axis clockwise rotates angle θ, dial gauge arrives reposition, be made as a ' respectively, b ', c ', if place, three nut centers circular diameter is 2m, dial gauge contact point a, b, c place circular diameter is 2n

[2] adjust: with first nut (1) is the fixed support point, adjusts the position of other two nuts respectively, establishes second nut (2) and has adjusted X ₂, the 3rd nut (3) has been adjusted X ₃Afterwards, the orthogonal simulation card is vertical with pitch axis, and at this moment a and a ', b and b ' have just dropped on the desirable vertical plane:

[2.1] from initial position dial gauge is rotated the θ degree after, read the dial gauge changing value;

[2.2] with initial parameter and the following equation group of dial gauge changing value substitution, calculate the adjustment amount of determining other two nuts,

$\left\{\begin{array}{c}[2\sin (150-\mathrm{\&theta;})-1]X_3-[1+2\cos (120-\mathrm{\&theta;})]X_2=3m{R}_{a^{\&prime;}a}/n\\ 2[1-\sin (90-\mathrm{\&theta;})]X_2-[1+2\cos (120-\mathrm{\&theta;})]X_3=3m{R}_{b^{\&prime;}b}/n\end{array}\right.$

X in the equation group ₂And X ₃Be respectively the adjustment amount of second nut (2) and the 3rd nut (3), R _{A ' a}Be dial gauge numerical value, R in a ' position _{B ' b}Be dial gauge numerical value in b ' position;

[2.3] with the adjustment amount X of second nut (2) and the 3rd nut (3) ₂And X ₃Calculate dial gauge monitoring value Δ a ', δ b ';

[2.4] monitor by dial gauge, confirm whether second nut (2) and the 3rd nut (3) reach the adjustment amount of calculating.

2. the vertical rapid adjustment method with pitch axis of radar orthogonal simulation card according to claim 1 is characterized in that: the formula of step [2.3] calculating dial gauge monitoring value Δ a ', δ b ' is as follows:

3. the vertical rapid adjustment method with pitch axis of radar orthogonal simulation card according to claim 1 is characterized in that:

Step [2.4] is adjusted nut in new position according to dial gauge monitoring value sign symbol, when adjusting second nut 2, when a ' some dial gauge value of reading variable quantity is | Δ a ' |, illustrate that then second nut, 2 adjustment amounts reach X ₂When adjusting the 3rd nut 3, when b ' some dial gauge value of reading variable quantity is | δ b ' |, illustrate that the 3rd nut 3 adjustment amounts have reached X ₃

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