CN108507470A - A method of measuring LED light source spatial coordinate location - Google Patents

Abstract

The invention discloses a kind of methods measuring LED light source spatial coordinate location, include the following steps：The vertical shadow bar for respectively installing a regular length on arbitrary two positions in ground indoors；LED light source is lighted, when LED light source shines, shadow bar can project corresponding certain length and the shade of angle on ground, pick up the length and angle of the shade respectively by instrument or induction equipment；In the case of known two shadow bar's coordinate positions and shadow bar's height, the spatial value of LED light source position is calculated.Present invention measurement is simple and convenient, and precision can reach centimetre rank or more.

Description

A method of measuring LED light source spatial coordinate location

Technical field

The present invention relates to LED light communication and indoor positioning application fields, specially a kind of measurement LED light source space coordinate position The method set.

Background technology

With the high speed development of traffic, GPS global positioning systems also become people and travel at home the indispensability travelled outdoors Tool.But since signal is blocked by building, GPS signals are very faint indoors, are unable to reach the requirement of positioning.

Indoor positioning refers to realizing position positioning in environment indoors, mainly uses wireless telecommunications, base station location, inertial navigation fixed The multiple technologies such as position are integrated to form a set of indoor location locating system, to realize the position indoors in space such as personnel, object Set monitoring.Currently, the visible light communication location technology based on LED green illumination light sources have in-door covering it is wide, it is energy saving, safe, Lay outstanding advantages of simple, at low cost, Electro Magnetic Compatibility is good.However, when we are positioned using LED light, it is thus necessary to determine that The spatial coordinate location of LED light source, such as its height and ground coordinate etc..Traditional mode is manually to measure, in this way Less accurately and conveniently.Measurement accuracy cannot accurately light source height and coordinate position.

Invention content

Ground coordinate position that is convenient, calculating LED light source and height-precision are measured the purpose of the present invention is to provide a kind of The method of high measurement LED light source spatial coordinate location.

To achieve the above object, the present invention provides the following technical solutions：

A method of LED light source spatial coordinate location is measured, is included the following steps：

S1：The vertical shadow bar for respectively installing a regular length on arbitrary two positions in ground indoors；

S2：LED light source is lighted, when LED light source shines, shadow bar can project corresponding certain length and the moon of angle on ground Shadow picks up the length and angle of the shade by instrument or induction equipment respectively；

S3：In the case of known two shadow bar's coordinate positions and shadow bar's height, the space of LED light source position is calculated Coordinate value.

Specifically, the step S3 is specially：

Set LED light source space coordinate as（x,y,z）, at will take at 2 points on ground, it is assumed that its coordinate be W (a, b), Q (c, d), The shadow bar that standard height etc. is k is vertically filled on this two points, shadow bar's apex coordinate is respectively M（a,b,k）,N(c,d, K), M is set, the coordinate of the shade of N is F, and J, shade is respectively A, B relative to X-axis angle, since a, b, c, d, A, B, k are Known, the intersection point of two space lines MF and NJ are exactly the coordinate position of LED light, and x, y, z numerical value are found out by following formula

(x-a)/cosA=(y-b)/sinA=L1*(z-k)/-k

(x-c)/cosB=(y-d)/sinB=L2*(z-k)/-k。

Specifically, the instrument camera distance-measuring equipment, the induction equipment is sensor instrument distance equipment.

Compared with prior art, beneficial effects of the present invention are as follows：

The present invention is by two regular length shadow bars of right angle setting on two positions on ground indoors, when LED light source shines A shade can be projected on ground in shadow bar, by measuring this two shadow bar's shadow lengths and angle, known two The height condition of the coordinate position of a shadow bar's location point, shadow bar can calculate ground coordinate position and the height of LED light source Degree, measurement is simple and convenient, and precision can reach centimetre rank or more.

Description of the drawings

Fig. 1 is the schematic diagram that LED light spatial coordinate location is measured using shadow bar of the present invention.

Specific implementation mode

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Referring to Fig. 1, the present invention provides a kind of technical solution：First set LED light source space coordinate as（x,y,z）, on ground Face at will takes a bit, it is assumed that its coordinate is W (a, b), the shadow bar that a full-length is k is vertically filled on this aspect, in this way The space coordinate on shadow bar vertex is respectively M (a, b, k)

When LED light source shines, shadow bar can be projected out a shade on the ground respectively, set shadow bar under light illumination, M The point of spot projection on the ground is F, and shadow length is respectively L1, and shade is respectively A relative to X-axis angle

We can calculate F space coordinates be F（a+L1*cosA）, (b+L1*sinA), 0 }

It is understood that in known M, after the space coordinate of F, we can obtain the straight line equation in the spaces MF：

(x-a)/(a+L1*cosA-a)=(y-b)/( b+L1*sinA-b)=(z-k)/(0-k)

It derives：(x-a)/L1*cosA=(y-b)/L1*sinA=(z-k)/-k

It derives：(x-a)/cosA=(y-b)/sinA=L1*(z-k)/-k

Similarly, another point Q (c, d) is set on the ground, the projection that a full-length is K is vertically filled on this aspect The space coordinate of bar, shadow bar vertex is N (c, d, k)

When LED light source shines, shadow bar can be projected out a shade on the ground respectively, and shadow bar vertex N is on ground for setting On subpoint be J, shadow length is respectively L2, and shade is B relative to X-axis angle.

We be capable of J space coordinate J（c+L2*cosB）, (d+L2*sinB), 0 }

Know N, after the space coordinate of J, we can obtain the straight line equation in the spaces NJ

(x-c)/(c+L2*cosB-c)=(y-d)/( d+L2*sinB-d)=(z-k)/(0-k)

(x-c)/cosB=(y-d)/sinB=L2*(z-k)/-k

Because a, b, c, d, A, B, L1, L2 are known, the intersection point of straight line WF and straight line NJ are exactly the space coordinate of LED light source Position

(x-a)/cosA=(y-b)/sinA=L1*(z-k)/-k

(x-c)/cosB=(y-d)/sinB=L2*(z-k)/-k。

It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace And modification, the scope of the present invention is defined by the appended.

Claims (3)

1. a kind of method measuring LED light source spatial coordinate location, includes the following steps：

S1：The vertical shadow bar for respectively installing a regular length on arbitrary two positions in ground indoors；

S2：LED light source is lighted, when LED light source shines, shadow bar can project corresponding certain length and the moon of angle on ground Shadow picks up the length and angle of the shade by instrument or induction equipment respectively；

S3：In the case of known two shadow bar's coordinate positions and shadow bar's height, the space of LED light source position is calculated Coordinate value.

2. a kind of method measuring LED light source spatial coordinate location according to claim 1, it is characterised in that：The step Suddenly S3 is specially：

Set LED light source space coordinate as（x,y,z）, at will take at 2 points on ground, it is assumed that its coordinate be W (a, b), Q (c, d), The shadow bar that standard height etc. is k is vertically filled on this two points, shadow bar's apex coordinate is respectively M（a,b,k）,N(c,d, K), M is set, the coordinate of the shade of N is F, and J, shade is respectively A, B relative to X-axis angle, since a, b, c, d, A, B, k are Known, the intersection point of two space lines MF and NJ are exactly the coordinate position of LED light, and x, y, z numerical value are found out by following formula

(x-a)/cosA=(y-b)/sinA=L1*(z-k)/-k

(x-c)/cosB=(y-d)/sinB=L2*(z-k)/-k。

3. a kind of method measuring LED light source spatial coordinate location according to claim 1, it is characterised in that：

The instrument camera distance-measuring equipment, the induction equipment are sensor instrument distance equipment.