CN101514902B - Navigation device for the blind - Google Patents

Abstract

Translated fromChinese

本发明公开了一种盲人导航装置，属于电子导航领域。其结构包括：电源模块、信息采集模块、核心解码模块、驱动模块和触觉提示模块，其中：信息采集模块与核心解码模块相互传输信号，核心解码模块的输出端接驱动模块的输入端，驱动模块的输出端接触觉提示模块的输入端，电源模块给上述所有模块供电。鉴于人的触觉在信息获取和感知方面的独特优势，该装置可以让盲人出行不再依赖于盲道或借助他人帮助，很大程度地解决了盲人出行困难问题，使盲人独立出行成为可能。

The invention discloses a navigation device for the blind, which belongs to the field of electronic navigation. Its structure includes: power supply module, information collection module, core decoding module, drive module and tactile prompt module, wherein: information collection module and core decoding module transmit signals to each other, the output terminal of core decoding module is connected to the input terminal of driving module, and the driving module The output terminal of the contact sensory prompt module is connected to the input terminal, and the power supply module supplies power to all the above-mentioned modules. In view of the unique advantages of human tactile sense in information acquisition and perception, this device can make blind people no longer rely on blind roads or help others to travel, which largely solves the problem of blind people's travel difficulties and makes it possible for blind people to travel independently.

Description

A kind of blind man navigation device

Technical field

The present invention relates to a kind of guider, relate in particular to a kind of blind man navigation device, belong to the electronic navigation field.

Background technology

According to statistics; Account for 14.61% of disabled person's sum by China person with visual disabilities in 2003; These persons with visual disabilities receive the puzzlement of visual function obstacle and the influence of living environment, and scope of activities receives very big restriction, and its people and family have become society and gone up one of the most difficult colony of life.Therefore how to expand person's with visual disabilities information perception channel, and then expand the new approaches that its scope of activities becomes this social concern of solution.Sense of touch is an information transfer channel important but that be not fully utilized at present.People's tactilely-perceptible organ is compared with the sense of hearing, the organs of vision has very big difference: vision and hearing organ concentrate, and have only when people's notice mainly concentrates on audiovisual, just can the information of carrying out obtain; And people's thigmoreceptor is distributed in people's whole body, does not need the special concern of people's notice just can produce touch feeling continuously; The frequency range of tactilely-perceptible can reach KHz far above vision; Haptic stimulus is man-to-man, pointed characteristics; Utilize sense of touch can perception abundant information.Research shows that haptic stimulus can directly pass to visual cortex, and this physiological Study is that sense of touch substitutes and the expansion visual performance provides the important theory foundation.At present, blind person's walking and trip still depend on the sidewalk for visually impaired people of urban construction or other people assisting to a great extent.

Summary of the invention

The present invention proposes a kind of blind man navigation device for the problem that solves blind person's trip and expansion blind person scope of activities.

A kind of blind man navigation device; Its structure comprises: power module, information acquisition module, core codec module, driver module and tactile cue module; Wherein: information acquisition module and the mutual transmission signals of core codec module; The input end of the output termination driver module of core codec module, the input end of the output terminal contacting feeling prompting mould of driver module, power module is given above-mentioned all module for power supply.

The present invention is a kind of blind man navigation device, and this device is to utilize the human body sense of touch can experience extraneous abundant information, and the information response speed mechanism that routine is looked, the sense of hearing is fast is developed.This device can position user's geographic position, and has multiple tactile cue signal, lets the blind person go on a journey to be no longer dependent on sidewalk for visually impaired people or help by other people, has solved blind person's difficult problem of going on a journey largely, and the blind person is independently gone on a journey becomes possibility.

Description of drawings

Fig. 1 is a modular structure block diagram of the present invention.

Fig. 2 is the circuit structure diagram of core decoder module among the present invention.

Fig. 3 is the circuit structure diagram of driver module among the present invention.

Embodiment

As shown in Figure 1; A kind of blind man navigation device; Its structure comprises:power module 1,information acquisition module 2,core codec module 3,driver module 4 andtactile cue module 5, wherein:information acquisition module 2 andcore codec module 3 mutual transmission signals, the input end of the outputtermination driver module 4 ofcore codec module 3; The input end of the output terminal contactingfeeling reminding module 5 ofdriver module 4,power module 1 is given above-mentioned all module for power supply.

Power module 1 has adopted the lithium battery power supply of two joint3800mAh.Power module 1 is the required level of each module with the level conversion that lithium battery provides.The required level of this system has 1.8V and 3.3V.

Information acquisition module 2 comprises GPS module and digital compass.The GPS module is used to gather the two-dimensional position information of target, i.e. user's absolute geography information is like the longitude and latitude and the road information of Location; The shirtfront that digital compass is used to gather the user towards, be true origin with user promptly, the earth magnetism North and South direction is respectively under the horizontal coordinates of coordinate axis, the user towards level orientation angle information.According to the two-dimensional position information of target and user towards level orientation angle information, can calculate the positional information of target, i.e. the relative horizontal position angle degree and the range information of target with respect to the user.

As shown in Figure 3,core codec module 3 is the controller modules based on embedded system.Consider that from the concrete function and the environment for use angle of situation signal conditioning package kernel processor chip adopts the LPC2294 at grace intelligence Pu.This module converts the information thatinformation acquisition module 2 sends to situation information tactile coding signal according to predetermined encryption algorithm with the situation information data, and sends todriver module 4.

As shown in Figure 4,driver module 4 is that this guider is realized the functional part that tactile data is expressed, and its information translation thatcore codec module 3 is transmitted is that suitable activation bit drives tactile cue module 5.Thisdriver module 4 mainly is made up of the analog to digital converter MAX5259 and the driver for inductive load NUD3105D of a single-chip microcomputer C8051, four spi bus.

Tactile cue module 5 is used to provide the sense of touch form to stimulate; This guider adopts the vibrating tactile mode; This module is the Vib. of an array of being made up of vibrating motor, promptly be fixed on the waistband around waist one circle by 12 evenly distributed vibrating motors of level angle.According to the coding method of rational system vibration, just can the position of two targets be provided and apart from situation information through 12 vibrating motors to the user.

In this guider except that optimal design, the stand-by time that has adopted WV Two monitor levels and high power capacity lithium battery to come extension fixture.The WV Two monitor levels is monitored cell voltage and chip operating voltage respectively, when cell voltage reduces to a certain setting value, will point out the user to charge or changes battery.The chip operating voltage supervisory circuit has been used the power monitoring chip CAT1025JI30 of band I2C storer, and the threshold voltage that resets is 3.0-3.15V, has improved the reliability of system.Signal nRST is connected to the reset pin RESET of kernel processor chip LPC2294.When reset key RST pressed, the RESET pin of power monitoring chip CAT1025JI-30 was exported reset signal at once, and kernel processor chip LPC2294 is resetted.In addition, adopt one road AD to monitor in real time, to guarantee that the prompting user charges or changes battery when battery electric quantity is not enough for the voltage of lithium battery.

The workflow of this guider is:

(1) from GPS (band touch-screen) set the destination that will arrive;

(2) aftercore codec module 3 receives the command request of GPS, begin to read the current geography information of user;

(3) shortest path that arrives the destination is sought in 3 beginnings of core codec module in existing map;

(4) search out shortest path after,core codec module 3 will constantly read the current geography information of user and compare with shortest path, and point out the user to accomplish different walking actions through drivingtactile cue module 5;

(5) said process is constantly carried out, till arriving the destination.

Claims (3)

Translated fromChinese

1.一种盲人导航装置，其特征在于：包括电源模块(1)、信息采集模块(2)、核心解码模块(3)、驱动模块(4)和触觉提示模块(5)，其中：信息采集模块(2)与核心解码模块(3)相互传输信号，核心解码模块(3)的输出端接驱动模块(4)的输入端，驱动模块(4)的输出端接触觉提示模块(5)的输入端，电源模块(1)给上述所有模块供电；所述驱动模块(4)包含单片机(U31)、第一插座(J8)、第二插座(RP1)、四路模数转换器和四路感性负载驱动器，其中：单片机(U31)通过第一插座(J8)连接第二插座(RP1)，第二插座(RP1)的输出端连接每路的模数转换器输入端，每路模数转换器的输出端连接每路感性负载驱动器。1. A navigation device for the blind, characterized in that: comprising a power supply module (1), an information collection module (2), a core decoding module (3), a drive module (4) and a tactile prompt module (5), wherein: information collection The module (2) and the core decoding module (3) transmit signals to each other, the output terminal of the core decoding module (3) is connected to the input terminal of the driving module (4), and the output terminal of the driving module (4) contacts the sensory prompt module (5). Input end, power supply module (1) supplies power to above-mentioned all modules; Described driving module (4) comprises single-chip microcomputer (U31), first socket (J8), second socket (RP1), four-way analog-to-digital converter and four-way Inductive load driver, wherein: the single-chip microcomputer (U31) is connected to the second socket (RP1) through the first socket (J8), and the output end of the second socket (RP1) is connected to the input end of each analog-to-digital converter, and each analog-to-digital conversion The output of the device is connected to each inductive load driver.2.根据权利要求1所述的一种盲人导航装置，其特征在于：核心解码模块(3)是一个核心处理芯片。2. A kind of navigation device for the blind according to claim 1, characterized in that: the core decoding module (3) is a core processing chip.3.根据权利要求1所述的一种盲人导航装置，其特征在于：触觉提示模块(5)是由12个振动电机组成。3. A navigation device for the blind according to claim 1, characterized in that: the tactile prompt module (5) is composed of 12 vibration motors.

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