CN204791898U

CN204791898U - Device that blind person's sense of touch image was realized

Info

Publication number: CN204791898U
Application number: CN201520343061.8U
Authority: CN
Inventors: 赵向东; 汪凯巍
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2015-05-26
Filing date: 2015-05-26
Publication date: 2015-11-18
Anticipated expiration: 2025-05-26

Abstract

The utility model discloses a device that blind person's sense of touch image was realized, under the cooperation of motor fixed plate and touch pad, contact and can be realized the up -and -down motion by control in a list contact that utilizes micro step motor and lift post to constitute the image, and (i) (i) a micro step motor forms the array of matrix arrangement to N. Microcontroller contain (i) N (i) the binary image of pixel converts control signal to, through motor -drive circuit control (i) N (the i) array of a micro step motor and the component that contacts that the lift post constitutes makes it present the state corresponding with binary image: it is protruding that the pixel is 1 point, and the pixel be 0 point and caves in. The surrounding environment is experienced through the undulation of array directly perceivedly to usable device of blind person user, the contact spacing is less, and the array can be realized in the small region of compactness.

Description

The device that a kind of blind touch image realizes

Technical field

The utility model relates to blind man navigation, ancillary technique, human-computer interaction technology, particularly relates to the device that a kind of blind touch image realizes.

Background technology

Blind person, due to the defects of vision, has to utilize other sensory channels to come the perception external world, and in the sense of taste of blind person, sense of touch, sense of smell, in the sense organs such as the sense of hearing, what can effectively utilize is the sense of hearing and sense of touch.Blind visual is assisted, the advantages such as sense of touch has again incomparable advantage relative to the sense of hearing, and it has intuitively relative to the sense of hearing, real-time is good, contain much information.

Sense of touch substitutes vision, is a kind of process visual pattern being converted to tactile pattern.Tactile pattern allows blind person's perception with the form of tactile array.Directly reconstruct and sense organ can be divided into from realization means to substitute two large classes, directly reconstruct the skin referring to direct stimulating human and produce tactile feel, sense organ is alternative refers to that substituting skin with other sense organ accepts haptic signal and indirectly judge tactile feel.The many employings of current haptic stimulus directly reconstruct mode, and the focus of research mainly concentrates on stimulation mode actualizing technology aspect, is divided into the modes such as electromagnetic type, piezoelectric vibration formula, memorial alloy formula, pneumatic type, electro photoluminescence formula, electrostriction formula.

Summary of the invention

The purpose of this utility model replaces vision for realizing sense of touch, provides a set of device realizing tactile array newly.The utility model is undertaken compressing, extracting useful information by landform that dimensional topography detector is obtained and scene, obtain the bianry image compared with statuette prime number, binarized pixel is converted to concavo-convex tactile pixels, finally realize concavo-convex array, the scene that person of good sense can see is converted to a frame " tactile pattern " and be supplied to blind person, for blind person provides vision to assist.

The purpose of this utility model is achieved through the following technical solutions: the device that a kind of blind touch image realizes, and comprises dimensional topography detector, single-chip microcomputer, N number of micromachine, N number of lifting column, motor fixing plate, touch pad, a N/2 motor-drive circuit; Wherein, N=2n ², n be greater than 1 even number; Described micromachine is stepper motor, and rotating shaft is threaded; Lifting column is prism, and top has projection, and as the contact that blind person touches, bottom has threaded hole, and the screw thread of described threaded hole and micromachine matches; Motor fixing plate has the circular groove of N number of matrix arrangement, the bottom of micromachine is nested in circular groove; Motor fixing plate also has N number of through hole, for the control line of micromachine provides passage; Touch pad has N number of square opening, lifting column is through square opening, and bottom is threaded with micromachine, and the square opening of touch pad blocks lifting column thus makes it can only do vertical moving up and down.

Described motor-drive circuit comprises four transformation from serial to parallel signal shift register U1-U4 connected successively, and eight parallel output pin of each transformation from serial to parallel signal shift register connect the signal wire of two micromachines successively; The shift signal end of U1 is accessed after the shift signal end of U2, U3, U4 is connected; The refreshing output terminal of U1 is accessed after the refreshing output terminal of U2, U3, U4 is connected; The serial input terminal of the shift signal end of U1, the refreshing output terminal of U1, U1 connects the I/O mouth of single-chip microcomputer respectively.

The beneficial effects of the utility model are as follows:

1, blind person user can utilize this device, experiences surrounding environment intuitively by the fluctuating of array;

2, array can refresh with the movement of user, has real-time;

3, contact spacing is less, and array can realize in compact zonule.

Accompanying drawing explanation

Fig. 1 is system parts schematic diagram;

Fig. 2 is the side view of overall hardware configuration;

Fig. 3 is the diagram of the element circuit of motor-drive circuit;

Fig. 4 is man-machine interactive system overall schematic;

In figure, micromachine 1, lifting column 2, motor fixing plate 3, touch pad 4.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

As shown in Figure 1, 2, the device that a kind of blind touch image of the utility model realizes, comprises dimensional topography detector, single-chip microcomputer, N number of micromachine 1, N number of lifting column 2, motor fixing plate 3, touch pad 4, a N/2 motor-drive circuit; Wherein, N=2n ², n be greater than 1 even number; Described micromachine 1 is stepper motor, and rotating shaft is threaded; Lifting column 2 is prism, and top has projection, and as the contact that blind person touches, bottom has threaded hole, and the screw thread of described threaded hole and micromachine 1 matches; Motor fixing plate 3 has the circular groove of N number of matrix arrangement, the bottom of micromachine 1 is nested in circular groove; Motor fixing plate 3 also has N number of through hole, for the control line of micromachine 1 provides passage; Touch pad 4 has N number of square opening, and lifting column 2 is through square opening, and bottom is threaded with micromachine 1, and the square opening of touch pad 4 blocks lifting column 2 thus makes it can only do vertical moving up and down.

As shown in Figure 3, described motor-drive circuit comprises four transformation from serial to parallel signal shift register U1-U4 connected successively, and eight parallel output pin of each transformation from serial to parallel signal shift register connect the signal wire of two micromachines 1 successively, the shift signal end of the connected rear access U1 of shift signal end (port one 1) of U2, U3, U4, the refreshing output terminal of the connected rear access U1 of refreshing output terminal (port one 2) of U2, U3, U4, the serial input terminal (port one 4) of the shift signal end (port one 1) of U1, the refreshing output terminal (port one 2) of U1, U1 connects the I/O mouth of single-chip microcomputer respectively, described transformation from serial to parallel signal shift register can adopt 74HC595 chip, 74HC595 chip is used to be for following consideration: each micromachine 1 needs four signal line, therefore signal port line required by motor array is very many, 1 of a single-chip microcomputer I/O port can be expanded to 8 by using 74HC595 chip, and multi-disc 74HC595 serial connection can be realized the expansion of more long number, as shown in Figure 2, four signal line of motor M 1 are connected on four output pins (15 of 74HC595 chip 7, 1, 2, 3) on, achieve 1 Bits Expanding to 32, 8 motor M 1-M8 can be controlled.

The course of work of the present utility model is as follows:

(1) dimensional topography detector shooting image, obtains the depth information of each pixel horizontal direction and vertical direction in image;

(2) according to the image depth information that step 1 obtains, the image of collection is converted into and needs the pixel count of tactile display to be the bianry image of N;

(3) bianry image is sent to single-chip microcomputer, single-chip microcomputer generates the signal of control micromotor arrays to motor-drive circuit, be specially: four pin A1, B1, A2, B2 circulation reception 16 system C, 6,3,9 of definition micromachine 1 for rotating forward, circulation reception 16 system 9,3,6, C is reversion; In bianry image pixel be 1 the corresponding micromachine 1 of point rotate forward, namely lifting column 2 rises; Pixel be 0 the corresponding micromachine 1 of point reverse, namely lifting column 2 keep flush with touch pad 4;

Preserve the Control timing sequence of 8 micromachines 1 by an array, described array comprises 4 longs, and each long 8 16 system numbers represent; 8 16 system positions that a certain position of long controls to start this corresponding micromachine 1, long can control 8 stepper motors; When needs control some micromachines 1 rotate time, four 16 system positions that this motor is corresponding on four longs are written as respectively C, 6,3,9 or 9,3,6, C, circulation sends these four long data to motor-drive circuit, 32 parallel output pin of motor-drive circuit are written into the control level of 8 micromachines 1, each like this needs are obtained for sequential level by the micromachine 1 controlling to rotate, and 8 motors are under control;

(4) motor-drive circuit drives micromachine 1 to rotate, thus drives lifting column 2 to do vertical movement with accurate displacement, finally provides blind person one width tactile pattern intuitively;

The pitch of such as micromachine 1 is 1mm and is single thread, then micromachine 1 rotates a circle, lifting column 2 rectilinear motion 1mm.The size of motor fixing plate 3 and touch pad 4 is close to the size of people's palm.For blind person, what present to them is one piece of touch pad 4, and the contact on touch pad 4 can present following information through concavo-convex combination: the trend of road, the position of barrier relative to blind person self, distance, the general shape of barrier, the basic scene information etc. of barrier.

Claims

1. the device of a blind touch image realization, it is characterized in that, comprise dimensional topography detector, single-chip microcomputer, N number of micromachine (1), N number of lifting column (2), motor fixing plate (3), touch pad (4), a N/2 motor-drive circuit; Wherein, N=2n ², n be greater than 1 even number; Described micromachine (1) is stepper motor, and rotating shaft is threaded; Lifting column (2) is prism, and top has projection, and bottom has threaded hole, and the screw thread of described threaded hole and micromachine (1) matches; Motor fixing plate (3) has the circular groove of N number of matrix arrangement, the bottom of micromachine (1) is nested in circular groove; Motor fixing plate (3) also has N number of through hole, for the control line of micromachine (1) provides passage; (4) have N number of square opening to touch pad, lifting column (2) is through square opening, bottom is threaded with micromachine (1), and the square opening of touch pad (4) blocks lifting column (2) thus makes it can only do vertical moving up and down;

Described motor-drive circuit comprises four serial signals of connecting successively and turns parallel signal shift register U1-U4, and eight parallel output pin of each transformation from serial to parallel signal shift register connect the signal wire of two micromachines (1) successively; The serial input clock signal terminal of U1 is accessed after the serial input clock signal terminal of U2, U3, U4 is connected; The clock signal end of U1 is accessed after the clock signal end of U2, U3, U4 is connected; The clock signal end of the serial input terminal of U1, the serial input clock signal terminal of U1, U1 connects the I/O mouth of single-chip microcomputer respectively.