RU89221U1 - NAVIGATION DEVICE FOR PERSONS WITH VIOLATIONS OF VISUAL FUNCTIONS - Google Patents

Abstract

1. A navigation device for people with visual impairment, comprising a global positioning system receiver, a pedometer, a magnetometer, a speaker mounted on the human body with visual impairment, characterized in that the device further comprises a robust non-linear adaptive filter connected to the antenna, a functional generator , a headphone and a terminal equipped with a personal computer connected to a second receiver of the global positioning system and a global communication modem with integrated and the control input of the functional generator is connected to the output of the magnetometer and pedometer, and the output is connected to the speaker and earphone mounted, for example, on the rim around the person’s head with visual impairment, the first input of the robust nonlinear adaptive filter is connected to the output of the receiver of the global positioning system, the second its input is connected to the output of the magnetometer and pedometer. ! 2. The navigation device for people with visual impairment according to claim 1, characterized in that a tracking receiver with the possibility of two-way communication for the global positioning system is used as the receiver of the global positioning system. ! 3. The navigation device for people with visual impairment according to claim 1, characterized in that the magnetometer is made according to the electromagnetic compass scheme with the ability to compensate for orientation errors of streets and roads within the city.

Description

Declared as a utility model, the technical solution relates to the field of navigation of moving objects and can be used in devices to facilitate the life of people with visual impairment.

Known "Navigation and control system for the blind" (EP US No. 200612938, MKI G01C 21/36, 06/15/2006).

The device contains a global positioning system, a large number of different types of proximity sensors from infrared and radars to accelerometers and inertial sensors connected to a computer and located on a limited area of a residential building. The device also uses radio frequency identifiers of objects surrounding a person with visual impairment, the information from which is perceived by sensors installed on his hands and feet. A computer converts information from multiple sensors into speech signals.

When leaving home, a visually impaired person uses a receiver of the global positioning system (GPS) with the sound of his location.

The disadvantage of this device is the impossibility of its technical implementation, requiring a powerful computer with a very large amount of memory, which, due to the large number of sensors, will not be able to work in real time. The cost of the device and its maintenance is also high.

The known "Navigation device and navigation system for the blind and people with visual impairment and navigation method" (EP No. 1930742, MKI G01S 5/14, 11.06.2008). The device contains speakers, headphones, two global positioning system receivers, two computers, one of which contains topographic information of the area (within the city), the second processes information about the position of a person with visual impairment using the differential method. To transmit voice messages about the location of a person received using a computer and speech synthesizers, the GSM / GPRS global communication system is used.

The disadvantage of this device is that it can only work in the city, requires a very fast computer with a large amount of memory and also raises great doubts that it is possible to convert the information of the GPS receiver into a speech signal that can be understood by a person with visual impairment without participation of a special dispatcher managing his movement.

Closest to the technical nature of the claimed utility model is the "Orientation system in the space of people with visual impairment" (RU No. 2299052, MKI G01C 21/00, 02/10/2007).

The device is made using a global positioning system (GPS) and includes a radar, a passive infrared system, a global positioning system receiver, a microphone, a speaker, a magnetometer, a pedometer installed on the human body and connected through a switch to a processor that processes incoming information using speech synthesizers , and the speaker transmits information to the person about the spatial position and the obstacles surrounding it.

The disadvantage of this device is that with a large amount of incoming information, it will not be able to work in real time, which will greatly complicate the movement of a person with a violation of visual functions in space. The device does not allow to reduce errors in determining the coordinates and orientation angles of a person with a violation of visual functions of space. There are serious doubts about the possibility of converting the location of the object into a speech signal without the participation of a special dispatcher.

The objective of the claimed utility model is to obtain in real time the coordinates and orientation of a person with visual impairment and the ability to control his movement.

The technical result consists in achieving high accuracy in determining the coordinates and trajectories of a person with visual impairment anywhere in the world and in coordinating its movement using one of three possible languages.

The technical result is achieved by the fact that in the device containing the receiver of the global positioning system, a pedometer, magnetometer, a speaker mounted on the human body with visual impairment, an additional robust non-linear adaptive filter connected to the antenna, a functional generator, a headphone and a terminal equipped with a personal a computer connected to the second receiver of the global positioning system and a global communication modem with a built-in antenna, the control input being functional the second generator is connected to the output of the magnetometer and the pedometer, and the output is connected to the speaker and the earphone, the first input of the robust nonlinear adaptive filter is connected to the output of the receiver of the global positioning system, its second input is connected to the output of the magnetometer and pedometer, and the receiver is used as the receiver of the global positioning system tracking with the possibility of two-way communication, and the magnetometer is made according to the electromagnetic compass scheme with the ability to compensate for orientation errors of streets and roads inside Orodes.

The technical result is achieved due to the fact that the device uses a robust non-linear adaptive filter that suppresses additive and multiplicative noise at the outputs of the magnetometer and receiver of the global positioning system, which significantly increases the accuracy of determining the coordinates of a person with visual impairment anywhere in the world, and the terminal with the dispatcher, coordinates the movement of this person.

The set of essential features of the invention ensures the achievement of the technical result obtained by the implementation of the utility model, in the form of the ability to accurately determine the coordinates and trajectory of a person with visual impairment anywhere in the world and the possibility of coordinating his movement with a dispatcher working at the terminal. In addition, you can, for example, use three terminals located in different countries.

The analysis of the prior art by the applicant has established that there are no analogues that are characterized by sets of features identical to all the features of the claimed device, therefore, the claimed device meets the “novelty” condition.

The essence of the proposed technical solution is illustrated by drawings, where:

figure 1 presents a diagram of a navigation device for people with visual impairment,

figure 2 shows a compensation scheme for errors of the magnetometer using the known orientation of streets and roads and the following notation is introduced:

1 - global positioning system (GPS) receiver

2 - robust non-linear adaptive filter

3 - antenna

4 - magnetometer

5 - functional generator

6 - pedometer

7 - speaker

8 - earphone

9 - satellite constellation of the global positioning system

10 - terminal

10.1 - personal computer

10.2 - global communication modem

10.3 - antenna integrated in the global modem

10.4 - second receiver of the global positioning system

10.5 - antenna built into the second receiver of the system

global positioning

The device comprises a global positioning system receiver 1, the output of which is connected to the first input of the robust non-linear adaptive filter 2, the output of which is connected to the antenna 3, a magnetometer 4, the output of which is connected to the second input of the robust non-linear adaptive filter 2 and the input of the functional generator 5, to which it is connected the output of the pedometer 6. The output of the functional generator 5 is connected to the speaker 7 and mounted, for example, on the rim around the person’s head with visual impairment by the earphone 8, and, ce blocks listed above are fixed on the human body. The device is connected to the satellite constellation of the global positioning system 9. The device also comprises a terminal 10 equipped with a personal computer 10.1 connected to a global communication modem 10.2 with a built-in global communication antenna (GSM / GPRS) 10.3 and to a second receiver of the global positioning system 10.4 with a built-in it has an antenna 10.5.

The receiver of the global positioning system 1 is a tracking receiver with the possibility of two-way communication (personal tracker) for the global positioning system [2]

As a satellite constellation of the global positioning system 9, the American GPS system or the Russian GLONASS can be used [1].

The magnetometer 4 is made according to the scheme of the electromagnetic compass [3].

Pedometer 6 is an electronic pedometer SHEE-01 manufactured by NPO Integral.

Functional generator 5 can be performed on the basis of the chip XR-2206 CP [4].

Robust non-linear adaptive filter 2 can be performed as a digital filter [5], [6].

The device operates as follows. If the movement of a person with visual impairment (hereinafter referred to as the object) is controlled inside the city, then the dispatcher serving the terminal 10 compensates for the errors of the magnetometer 4. Using the orientation of the streets and roads inside the city as shown in Fig. 2.

Compensation of map errors on the computer display 10.1 is performed using the signals of the second receiver of the global positioning system 10.4 and the antenna 10.5 transmitted information about the position of the object to the terminal 10 from the satellite constellation of the global positioning system 9. In addition, the nonlinear adaptive filter 2 suppresses non-Gaussian additive noises and Gaussian the multiplicative noise of the magnetometer 4 and the receiver of the global positioning system 1, which significantly increases the accuracy of determining the coordinates of the object.

When leaving the house, the object includes a global positioning system receiver 1, which receives radio signals from the satellite constellation of the global positioning system 9, and using the microphone located inside the receiver of the global positioning system 1 via antenna GSM / GPRS, antenna 10.3, modem 10.2 transmits to the computer 10.1 to the dispatcher signals containing information about their initial position, destination and their name.

.The dispatcher sees on the display screen of the personal computer 10.1, not only the coordinates of the appeared object but also its orientation, receiving radio signals via the GSM / GPRS global communication channel, antenna 10.3, modem 10.2, which carry information about the pitch of the audio signal reproduced by speaker 7 (height tones are connected linearly with the angular orientation of the object relative to the magnetic meridian, since the output signal of the magnetometer 4 changes the frequency of the functional generator 5 according to a linear law). Using the signals of the GSM / GPRS global communication channel, which are transmitted through the antenna built into the global communication modem 10.3, modem 10.2 and personal computer 10.1, the dispatcher communicates with the object, assigns it a number or call sign and receives it for service (the global receiver used in the device positioning 1 allows the dispatcher to simultaneously serve several objects, in this case five).

In the future, periodically, at a certain time interval, which is selected by the dispatcher and depends on the speed of the object, the dispatcher, using radio signals generated by a personal computer 10.1, modem 10.2 and transmitted by the antenna 10.3, built into the global communication modem via the global GSM / GPRS channel, requests the coordinates of the object, which are obtained when the receiver of the global positioning system 1 works with the signals sent by the satellite constellation of the global positioning system 9. The receiver of the system global positioning 1 sends through the antenna 3 and through the global communication channel GSM / GPRS radio signals to the terminal 10 containing the information requested by the dispatcher about the object. As a result, the coordinates of the object along with its path are displayed on the display of a personal computer 10.1. If the object’s trajectory deviates from the one planned by the dispatcher, he can use the GSM / GPRS global communication channel to correct the direction of the object’s movement (voice commands: “turn left or right a certain angle, go ahead a certain number of steps, or stop if the end point route reached "). The object perceives the angular position relative to the magnetic meridian in terms of the pitch of the output sound signal of the functional generator 5 using the earphone 8. Information about the distance traveled, the object perceives using a tone at the output of the functional generator 5, the pitch of which is determined by the output signal of the pedometer 6, (the number of steps taken converted to distance in meters).

In addition to the achieved technical effect, the device allows to achieve an additional technical effect, which consists in low cost.

Thus, the above information proves that when implementing the claimed device, the following conditions are met:

- a tool that embodies the proposed device in its implementation, is intended for use in the field of navigation of moving objects, namely in devices to facilitate the life of people with visual impairment;

- for the claimed device in the form described in the independent clause of the utility model formula, the possibility of its implementation using the means described before the filing date of the application is confirmed;

- the tool embodying the device in its implementation, is able to provide the specified technical result.

Therefore, the claimed utility model meets the patentability condition “industrial applicability”.

References:

1 .. Google: interactive. Catalog. German: German Prom, 2004. 1 electron. opt. disc (CD-ROM). Zag From the screen.

2. Korotonoshko, A Radio Navigation and Satellite Radio Navigation Systems / A. Korotonoshko, V. Klimov / Radio 2007. No. 7. 6 sec

3. Baranochnikov, M.L. Micro magneto electronics. Reference book / M.L. Baranochnikov. M .: DMK, 2001.541 s

4. Google: iterative. ELFA catalog 2009. 1 electron, opt. disk (SV-KOM). Zag from the screen.

5. Tomi PER AL. "Robust Kalman filtering in hybrid positioning applications" / Tomi PER AL, Robert Piche. Tampere University of technology - Finlande. F: ′ 4 ^th Workshop on Positioning, Navigation and communication ′, 2007.

6. C, D, Kerlegaard. "Huber Based Divided Difference Filtering" / C, D, Kerlegaard, S, Hanspeter, Virginia technology, Blacksburg, VA 24061-0203. American Institut of Aeronautics and Astronautics, Journal of Guidance. Navigation and Control-Volume 30, number 3, May-June 2007, pages 885-891.

Claims (3)

1. A navigation device for people with visual impairment, comprising a global positioning system receiver, a pedometer, a magnetometer, a speaker mounted on the human body with visual impairment, characterized in that the device further comprises a robust non-linear adaptive filter connected to the antenna, a functional generator , a headphone and a terminal equipped with a personal computer connected to a second receiver of the global positioning system and a global communication modem with integrated and the control input of the functional generator is connected to the output of the magnetometer and pedometer, and the output is connected to the speaker and earphone mounted, for example, on the rim around the person’s head with visual impairment, the first input of the robust nonlinear adaptive filter is connected to the output of the receiver of the global positioning system, the second its input is connected to the output of the magnetometer and pedometer. 2. The navigation device for people with visual impairment according to claim 1, characterized in that a tracking receiver with the possibility of two-way communication for the global positioning system is used as the receiver of the global positioning system. 3. The navigation device for people with visual impairment according to claim 1, characterized in that the magnetometer is made according to the electromagnetic compass scheme with the ability to compensate for orientation errors of streets and roads within the city.