CN108835738A

CN108835738A - Seeing-eye glove based on laser ranging

Info

Publication number: CN108835738A
Application number: CN201810665355.0A
Authority: CN
Inventors: 冯国英; 王芳杰; 李洪儒
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2018-11-20

Abstract

The present invention relates to a kind of technology for guiding blind based on laser ranging, and laser range finder is loaded on gloves, can expand the measurement range of guide instrument by the way that naturally both hands are swung in people's walking process.It is added to gesture motion simultaneously, different gestures corresponds to different measurement patterns or different measurement purposes, copes with most surroundings.Compared to other guide devices, function is more perfect, more efficiently.

Description

Seeing-eye glove based on laser ranging

Technical field

The present invention relates to a kind of laser ranging techniques, belong to technical field of optical detection.

Background technique

Currently, the technology wide variety of guide instrument application, but it is most dependent on ranging technology, mainly there is ultrasonic distance measurement Technology, laser ranging technique, optical imagery correlation technique etc..It should say, various ranging technologies all relative maturities, Mou Xieji The range accuracy of art is already considerable, as the precision of laser ranging can reach grade.Laser ranging technique generally uses two Kind method：Impulse method and phase method.Both methods is provided to the measurement light wave aerial propagation time, by calculating light Speed with from the product of received time difference is emitted to, to measure distance between the two.Ultrasonic ranging method is also Datong District Small difference, emits ultrasonic wave from range finder module, and ultrasonic wave encounters that barrier is return, and the velocity of sound is multiplied by emitting the one of the received time difference Half, distance as between the two.Optical imagery method is mainly by comparing the optical imagery that different moments acquire, when two Person's distance becomes close, and image will become larger, and distance becomes remote, and image will become smaller, and handles to obtain distance variation information by analysis, compared with Less than having for the former two, in precision.In guide instrument, be mostly preferred with first two technology, or be aided with the third.

However, existing guide instrument has its defect place.These instruments are substantially relatively fixed measurement, such as blind person Glasses are secured to eye, it appears and it is stiff, just less comply with one's wishes when coping with slightly complex environment, especially in stair activity Or it is just slightly powerless when back car messenger.

Summary of the invention

In order to overcome certain deficiencies of above-mentioned guide instrument, the present invention provides a kind of new guide instrument --- guide hand Set.The instrument effectively increases its flexibility for coping with various scenes while maintaining accurate distance measurement function.

The technical solution adopted by the present invention to solve the technical problems is：Laser range finder is loaded on gloves, people exists It can naturally be swung with both hands when walking, laser ranging range is wider, measures more flexible；Since gloves sheet is as a kind of soft Property material, with gesture difference, the resistance of different parts is also different.Therefore it is aided with different gestures, different measurements can be completed Purpose copes with more complex environment.

The present invention has the characteristics that compared with prior art and advantageous effects：

1. increasing since people swings along with natural both hands when walking in the case where not increasing additional components or additional consumption Its big measurement range, economical and efficient.

2. increasing gesture function, select different mode to cope with different ambient conditions by different gestures, more Targetedly, function is more perfect.

Detailed description of the invention

Fig. 1 is laser range finder schematic illustration.

Fig. 2 is that laser range finder is loaded into the basic effect picture after being worn on gloves by blind person.

Fig. 3 is the swing due to arm, and laser ranging can measure bigger range.

Fig. 4 is the specific schematic diagram on blind person's gloves.

Fig. 5 is blind person's gloves first gesture, indicates ranging working method.

Fig. 6 is blind person's gloves second gesture, indicates intelligent work mode.

Specific embodiment

With reference to the accompanying drawing, and by specific embodiment to the present invention it is described in further details, but it is merely to illustrate Some specific embodiments of the invention but should not be understood as being any restriction to the scope of the present invention.

Fig. 1 is the principle of laser ranging, and laser range finder module emits laser, returns after encountering barrier, measure light and exist The time propagated in air can be obtained by the distance between barrier.Fig. 2 is that laser range finder module is loaded into gloves On, then by people on hand, the laser of sending meets the pedestrian in front or barrier returns again to, if road surface evenness, manages It should be consecutive variations by the distance above measured, having can mutate when barrier.When blind person reaches at a distance from barrier When scanning distance mutation is beyond predetermined value when the early warning value of setting or in one direction, gloves will issue prompting.Fig. 3 shows The laser being loaded on gloves of anticipating has measured bigger range during swinging back and forth, and measurement angle also expands , it is able to reflect out the barrier situation of front upper place and front lower place.Fig. 4 is the functional schematic of gloves.Respectively have one before and after gloves A light-emitting window, provides prompting at the case where capable of completely monitoring front and back in time.

We add gesture recognition module to blind person's gloves simultaneously, by using flexible material, when making different gestures, By variations such as monitoring material parameter such as resistance, it is in blind person's gloves among different operating modes.Blind person's gloves master at present Two kinds of working methods are used, the first is ranging working method, and second is intelligent work mode.Ranging working method is main It is laser acquisition distance to be projected from middle finger, and pass through voice reminder blind person.Intelligent work mode is to go out light by three on gloves Mouthful monitoring ambient enviroment, is scanned when reaching the early warning value of setting at a distance from barrier as blind person or in one direction When distance mutation is beyond predetermined value, gloves will issue prompting.Such as：When prompt to road environment changes, for example there is building It when terraced, is stretched by middle finger index finger, other digital flexions, such as Fig. 5, blind person's gloves realize ranging operating mode, pass through middle finger Laser oneself can freely measure, and at this moment in order to guarantee safety, can open the measurement module of an other positions.When passing through this When section, changing gesture is bent thumb and little finger, other fingers stretch, and such as Fig. 6, can be returned to intelligent mode.

Claims

1. a kind of technology for guiding blind based on laser ranging, laser range finder is loaded on gloves, it is characterised in that pass through people Both hands when walking are swung naturally, expand the measurement range of laser ranging guide instrument, in combination with different gesture motions, Complete different measurement purposes.

2. a kind of technology for guiding blind based on laser ranging according to claim 1, it is characterised in that set by swinging with front and back Set the measurement range for expanding guide instrument.

3. a kind of technology for guiding blind based on laser ranging according to claim 1, it is characterised in that by adding gesture motion, Different measurement patterns is carried out, different measurement purposes is completed.