RU132990U1 - ORIENTATION SYSTEM OF THE BLIND MAN - Google Patents

Abstract

1. The orientation system of a blind person, containing a cane with a wheel on which a GPS receiver and a wheel turning drive are installed, characterized in that it includes an odometer mounted on the wheel and an information processing unit mounted on the cane, with an odometer and GPS - the receiver is connected to the information processing unit, the output of which is connected to the wheel turning drive. 2. The device according to claim 1, characterized in that the receiver has a differential correction receiver connected to the information processing unit. The device according to claim 1, characterized in that a magnetometer is mounted on the cane connected to the information processing unit.

Description

The utility model relates to the field of orientation systems of moving objects.

Currently, in world practice, systems based on the use of GPS navigation technology are used to orient blind people on the ground.

A blind person receives sound prompts about his location and direction of movement from a GPS navigation system. The developments of a number of foreign companies in this field are known. In particular, Human Ware has developed the Trekker 3 blind orientation system based on GPS technology. With the help of sound prompts that are generated in the GPS navigation system, a blind person is oriented in space, see the websites www.gisa.ru, and www.12v-clab.ru.

The prior art also knows the orientation system of a blind person (US 2008251110 A1, 16.10.2008). The structure of the system includes a cane with a wheel at the lower end, on which a GPS receiver is mounted, which generates control signals for warning devices for a blind person. This system is selected as an analogue of the invention.

Also known is the orientation system of a blind person according to the application for the invention of the Russian Federation No. 2009141904 of November 6, 2009, publication date 05/20/2011 (claims 3-6 of the claims). This system also includes a cane with a wheel. The difference from the analogue is that the wheel is controlled by data received from the GPS receiver. This system is selected as a prototype of the invention.

The disadvantage of systems - analogue and prototype is the lack of accuracy of determining the location of a blind person, due to several reasons. These include possible distortion of the GPS receiver signal caused by atmospheric phenomena, effects of signal re-reflection from buildings, foliage, etc. These errors lead to errors in determining the orientation and location of a blind person in space.

The objective of this utility model is to increase the accuracy of determining the orientation and location of a blind person and. as a result, improving the accuracy of adjusting its movement in a given direction using technical systems.

According to the utility model, this problem is solved by the fact that an odometer mounted on a wheel connected to an information processing unit is included in the orientation system. Also, to increase accuracy, the system uses a differential correction receiver and a magnetometer.

The orientation system diagram is shown in figures 1-3.

In FIG. 1-3 are indicated:

1 - a cane with a wheel

2 - odometer

3 - wheel turning drive

4 - GPS receiver

5 - information processing unit

6 - a blind person

7 - differential correction receiver

8 - magnetometer

The invention consists in the following.

In FIG. 1 shows a cane with a wheel 1 on which an odometer 2 is mounted. A canal of a wheel turning 3, a GPS receiver 4 and an information processing unit 5 are also mounted on a cane. A cane 1 is in the hands of a blind person 6. The outputs of the GPS receiver 4 and odometer 2 connected to the information processing unit 5, which is connected to the wheel turning drive 3.

In FIG. 2 shows a cane with a wheel 1 on which an odometer 2 is mounted. A canal of a wheel turning 3, a GPS receiver 4, an information processing unit 5 and a differential correction receiver 7 connected to a GPS receiver 4 are also mounted on the canes. The cane 1 is in hands of a blind person 6. The outputs of the GPS receiver 4 and odometer 2 are connected to the information processing unit 5, which is connected to the wheel turning drive 3.

In FIG. 3 shows a cane with a wheel 1 on which an odometer 2 is mounted. A canal of a wheel turning 3, a GPS receiver 4, an information processing unit 5 and a magnetometer 8 are also mounted on the canes. A cane 1 is in the hands of a blind person 6. The outputs of the GPS receiver 4 , odometer 2 and magnetometer 8 are connected to the information processing unit 5, which is connected to the wheel turning drive 3.

The operation of the system of FIG. 1 occurs as follows.

At the starting point, the blind person 6 turns on the GPS receiver 4 and begins to move, pushing a cane with wheel 1 in front of him. During the movement, the GPS receiver 4 determines the actual coordinates: the latitude and longitude of the location of the blind person 6, the direction of his movement and the distance traveled S _GPS and transmits this data in real time to the information processing unit 5.

At the same time, when moving the cane 1, the odometer 2 mounted on the wheel determines the distance S _od and transmits this data in real time to the information processing unit 5. In the information processing unit 5, using Kalman filter, data processing is optimal from the point of view of accuracy the distance traveled and an amendment is generated to the GPS receiver data 4. By using the same type of information from two dissimilar sources and its joint processing in the information processing unit 5, the final accuracy of generating pairs meters of location increases. The updated information from the information processing unit 5 goes to the wheel turning drive 3. More precise control of the wheel 2 by means of the turning wheel 3 drive leads to a more accurate movement of the blind person to a given point in space.

The operation of the blind person orientation system shown in FIG. 2 occurs as follows.

Mounted on a reed with wheel 1, the differential corrections receiver 7 measures the navigation corrections, which come either from land-based beacons with known coordinates, or from satellites. These accuracy corrections are transmitted from the differential corrections receiver 7 to the GPS receiver 4. The information processing unit 5 receives updated signals from the GPS receiver 4 and the odometer 2. In the information processing unit 5, as in the previous case, the optimal processing is performed data, due to which the overall accuracy of the orientation system increases.

Further, the updated data is fed to the wheel turning drive 3. As in the previous case, the accuracy of the movement of a blind person at a given point in space increases.

When using a differential correction receiver, the accuracy of positioning can reach 10-20 cm.

The operation of the blind person orientation system shown in FIG. 3 occurs as follows.

Mounted on a cane with wheel 1, magnetometer 8 generates a blind person 6. The heading signal from magnetometer 8 is sent to the information processing unit 5. Signals from the GPS receiver 4 and odometer 2 are received in the same information processing unit 5 5, the optimal processing of the measured data is performed, due to which the overall accuracy of determining the course increases.

Further, the updated data is fed to the wheel turning drive 3. As in previous cases, the accuracy of the movement of a blind person at a given point in space increases.

The essence of this utility model lies in the fact that to clarify the location of a blind person, heterogeneous sources of information with different spectral composition of errors are used. Due to this, when jointly processing this data, as a rule, it is possible to increase the accuracy of determining the location parameters. Such approaches are used in navigation systems of technical mobile objects - ships, aircraft, etc.

A technical implementation of this approach is possible for a blind person by installing the above devices and blocks on his canes and sharing data from them. This will make it possible to increase the orientation accuracy of a blind person.

Claims (3)

1. A blind person’s orientation system comprising a cane with a wheel on which a GPS receiver and a wheel turning drive are mounted, characterized in that it includes an odometer mounted on the wheel and an information processing unit mounted on the cane, the odometer and GPS - the receiver is connected to the information processing unit, the output of which is connected to the wheel turning drive. 2. The device according to claim 1, characterized in that the receiver has a differential correction receiver connected to the information processing unit. 3. The device according to claim 1, characterized in that the cane has a magnetometer connected to the information processing unit.

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