CN107561493B

CN107561493B - Light scanning type positioning device based on annular LCD characteristics

Info

Publication number: CN107561493B
Application number: CN201610207147.7A
Authority: CN
Inventors: 吴一稷
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-06-30
Filing date: 2016-06-30
Publication date: 2021-06-01
Anticipated expiration: 2036-06-30
Also published as: CN107561493A

Abstract

The invention discloses a light scanning type positioning device based on LCD characteristics, which has the characteristics of high positioning precision and low cost. The method comprises the following steps: (1) a light scanning type positioning device based on LCD characteristics comprises a signal source for providing positioning light and a mobile device needing positioning. (2) The signal source generates scanning beams by utilizing the shading characteristic of the LCD, the light source always emits light at the circle center of the annular LCD display screen, the annular LCD shields most of light, only one row of pixels are reserved to enable the pixels to transmit light, and then the row of pixels of the LCD are controlled to scan the whole 360 degrees to form the scanning beams. (3) The mobile equipment has the capability of receiving the light beam emitted by the signal source, and the time from the start of scanning to the reception of the light beam by the optical receiving module can be calculated, wherein the left signal source is scanned to obtain the time t1, the right signal source is scanned to obtain the time t2, and the position of the mobile equipment is determined through the times t1 and t 2.

Description

Light scanning type positioning device based on annular LCD characteristics

Technical Field

The invention relates to angle positioning in the field of wireless positioning, in particular to a light scanning type positioning device based on the characteristics of an annular LCD (liquid crystal display).

Background

With the continuous progress of science and technology, various positioning technologies are widely used, but the positioning products based on the electromagnetic wave angle in the market at present have the defect of inconvenient implementation.

Disclosure of Invention

The invention aims to provide a light scanning type positioning device based on the characteristics of an annular LCD (liquid crystal display), which has the characteristics of high positioning precision, convenience in arrangement, low cost, easiness in operation and convenience in maintenance.

In order to achieve the purpose, the invention adopts the following technical scheme:

a light scanning type positioning device based on the characteristics of a ring-shaped LCD comprises a signal source for providing positioning light and a mobile device needing positioning.

The signal source has the capability of emitting light (electromagnetic wave) for 360-degree scanning by taking a light source as a center;

the mobile device has the capability of receiving the light beam emitted by the signal source;

the signal source is connected with the mobile equipment and can transmit information through the wireless transmission module.

Further, the signal source comprises a light source, an annular LCD liquid crystal display screen (without backlight) with a control module, a wireless transmission module and the like.

Further, the mobile device comprises an optical receiving module, a control module, a wireless transmission module and an automation device using the technology.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

the invention utilizes the annular LCD to control the light positioning, and has the characteristics of high positioning precision, convenient arrangement, low cost, easy operation and convenient maintenance.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic view of the overall structure

FIG. 2 is a schematic diagram of a signal source structure

FIG. 3 is a schematic diagram of a mobile device structure

FIG. 4 is a schematic diagram of a mobile device

FIG. 5 is a partial enlarged view of a scanning schematic

FIG. 6 is a scanning schematic

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

1. The hardware of the invention comprises:

(1) referring to fig. 1, the optical scanning type positioning apparatus based on the ring LCD feature of the present invention is composed of a signal source 1 capable of generating positioning information, and a mobile device 2 receiving the positioning information on the ground 3.

In said component (1), the signal source 1 has the capability of emitting a positioning beam.

In said component (1), the mobile device 2 has the capability of receiving a positioning beam emitted by a signal source.

In the component (1), simple information can be transmitted between the signal source 1 and the mobile device 2 through the wireless transmission module.

(2) Referring to fig. 2, the signal source 1 of the present invention is composed of a light source 11 and an annular LCD display 12 (including a control module) with backlight removed.

In the signal source 1, the signal source 1 generates a scanning light beam by using the light-shielding characteristic of the LCD, the light source 11 emits light all the time at the center of the annular LCD display screen 12, the annular LCD shields most of the light, only one row of pixels is reserved to enable the light to be transmitted, and then the row of pixels of the LCD is controlled to scan the whole 360 degrees to form the scanning light beam.

In the signal source 1, the light source 11 is a light source (or an electromagnetic wave source) with a small volume.

In the signal source 1, the distance between the light source 11 and the annular LCD display screen 12 is proportional to the positioning accuracy, and the accuracy is higher the farther the distance is.

In the signal source 1, the annular LCD display 12 is a side form that a long strip LCD display is made into a cylinder, only the shape is changed, and other aspects are the same as those of a normal LCD display.

In the signal source 1, the annular LCD display screen 12 has no imaging requirement, so that in order to save cost, a black and white annular LCD liquid crystal display screen can be selected, and meanwhile, the function can be simplified, and only the function of column scanning is provided.

In the signal source 1, the resolution of the annular LCD display screen 12 is proportional to the positioning requirements, which include the total positioning area and the positioning accuracy.

(3) Referring to fig. 3, the mobile device 2 of the present invention is composed of an optical receiving module 21, a control module 22 containing a wireless transmission module, and an automation device 23 using the present technology.

(4) Referring to fig. 4, the mobile device 2 of the present invention is comprised of an optical receiving module, a wireless transmission module, a control module and an automation device using the present technology.

In the mobile device 2, the optical receiving module has the capability of receiving the positioning light beam and distinguishing the signal intensity.

In the mobile device 2, the wireless transmission module can be simple wireless devices such as bluetooth and WiFi, and has simple information communication capability with a signal source.

In the mobile device 2, the control module may analyze the signal information received by the optical receiving module to obtain the coordinate information of the position, and then control the automation device using the present technology according to the information (e.g., path information) in the database.

In the mobile device 2, the control module can select different chips, such as a single chip microcomputer, a RAM, a DSP, etc., according to performance requirements.

2. The working principle of the invention is as follows:

(1) referring to fig. 5, which is a partial enlarged view of fig. 6, when it is determined that a location on the ground needs to be located, where the location (defined as a) is above an optical receiving module, the wireless transmitting module of the mobile device transmits signals, the wireless transmitting module of the signal source receives the signals, and then the annular LCD display screen is controlled, because the LCD has a light-shielding property, most of the light is shielded, only one column of pixels is kept to be transparent, and a scanning beam is formed, which scans the whole plane 360 degrees step by step with a certain angle as a starting point.

(2) Referring to fig. 6, which is a schematic scanning view, the intersecting lines in the figure represent position a.

At least two signal sources work together to produce the desired positioning effect.

When there are only two sources:

the left annular LCD display screen is transversely scanned from 0 degree to 360 degrees in an array mode, the effect of scanning the whole plane by light beams is obtained due to the light transmitting and shading characteristics of the liquid crystal display, and when the left annular LCD display screen is scanned to a position A on the ground, the optical receiving module receives the intensity conversion of the light beams and transmits information to the control module in the mobile equipment. At this time, the control module obtains t1 by calculating the time from the start of scanning to when the optical receiving module receives the light beam;

then the right annular LCD display screen continues to scan subsequently, and t2 can be obtained similarly;

the specific position can be found from t1 and t 2.

When a large number of signal sources are used together, when a large area is located:

the signal sources are arranged in a row, all the signal sources start scanning from a certain angle at the same time, the mobile equipment selects two strongest optical signals, therefore, the position A is necessarily between two adjacent signal sources and is divided into t1 and t2 according to the receiving time sequence, if clockwise scanning is adopted, the scanning receiving time of the signal source on the left side is t1, and the scanning receiving time of the signal source on the right side is t 2.

The position A can be obtained from t1 and t 2.

(3) The above process is repeated.

Note that: the transmission delay is subtracted additionally, and both t1 and t2 are the result after the processing delay.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Light scanning formula positioner based on annular LCD characteristic, its characterized in that:

1) the device comprises a signal source for providing positioning light and mobile equipment needing positioning; the signal source comprises a light source and an annular LCD (liquid crystal display); the mobile equipment needing to be positioned is mobile equipment on the ground; the light source is a light source with a small volume;

2) the signal source generates scanning beams by utilizing the shading characteristic of the LCD, the light source emits light at the circle center of the annular LCD display screen, the annular LCD shields most of light, only one row of pixels are reserved to enable the pixels to transmit light, and then the row of pixels of the LCD are controlled to rotate and scan the whole 360 degrees to form the scanning beams;

3) the mobile equipment has the capability of receiving the light beam emitted by the signal source, calculates the time from the beginning of scanning to the time when the optical receiving module of the mobile equipment receives the light beam, obtains the time t1 and the time t2 according to the difference of the positions of the signal source, obtains the angle information through the time t1 and the time t2, and then determines the position of the mobile equipment according to the position of the signal source;

4) the signal source is connected with the mobile equipment and transmits information through the wireless transmission module; when positioning is needed, the wireless transmission module of the mobile equipment transmits signals, the wireless transmission module of the signal source receives the signals, and then the annular LCD display screen is controlled to form scanning beams.

2. The optical scanning positioning device for annular LCD based on the characteristics of claim 1, wherein the signal source comprises an electromagnetic wave source, a backlight-removed annular LCD liquid crystal display screen with a control module, and a wireless transmission module.

3. The apparatus of claim 1, wherein the mobile device comprises an optical receiving module, a control module, and a wireless transmission module.

4. The optical scanning positioning device for annular LCD based on the characteristics of claim 2, wherein the backlight-removed annular LCD with the control module is black and white LCD, and the function only has the function of column scanning.

5. The light scanning positioning device based on ring LCD characteristics as claimed in claim 2, wherein the control module-containing de-backlit ring LCD liquid crystal display screen is in the shape of a ring, the ring being a cylindrical side or a spherical portion.