Cane for sight-disabled person

FIELD: medicine.

SUBSTANCE: invention concerns medical equipment, in particular devices for orientation blind in surrounding space, and can be used at independent movement blind in non determined situation, and also in extreme situations when blind urgent medical aid is required. The cane represents a stick with the handle with a receiver-radiator, established on the cane with the possibility of change of an angle of an inclination to a stick axis in planes of symmetry of a cane, the block of processing of the information, the power supply and an annunciator. The receiver-radiator it is supplied by an agent of an operational control of an angle of its inclination to an axis of the stick in the course of movement of the user. In addition there is a transmitter with the radiating aerial, an including button, the pendular switch, the relay and the receiver with the catching aerial. The transmitter is executed in the form of consistently included a setting high-frequency generator, the phase manipulator which second input is bridged to an exit of the generator of pseudo-random series, and the power amplifier, which exit the receiver - in the form of consistently connected to the catching aerial of the amplifier of high frequency, a line of a delay and the phase detector which second input is bridged to an exit of the amplifier of high frequency is connected to the radiating aerial, and, and the exit is connected to the block of registration and an alarm signal annunciator.

EFFECT: invention use allows dilating functionality of the cane for the sight-disabled person by transfer of alarm signal to rescuers, physicians or relatives in case of extreme situation on the radio channel.

4 dwg

We offer cane relates to medical engineering, in particular to a device for guiding the blind in the surrounding space, and can be used in independent movement of the blind in a non-deterministic environment, as well as in extreme situations, when the blind need urgent care.

Known ultrasonic cane "Ultra Cane", the material which is published, for example, in the newspaper "Yorkshire Post" for February 1, 2005, section Busiess week"article "Sound idea offers help to the blind". More information about cane Ultra Cane" available on the Internet, on the website www.sound-for sight.co.uk. Cane "Ultra Cane contains two fixed ultrasonic piemaisijies, the information-processing device and the signaling device in the form of a vibration transducer mounted in the handle of a cane. Premisljati generate ultrasonic pulses and receive the reflected echo signals. Depending on what channel received signal, the information-processing device includes a particular vibration sensor, and the user can roughly judge the location of the obstacles.

The disadvantage canes Ultra Cane" is that the axis direction of the ultrasonic pievescola rigidly fixed relative to the cane, and the user may not wish to change, for example, the height of the zone of survey reports asno its growth or any other preferences.

Also known cane "Laser Cane, the material on which it is published, for example, in the journal "Photonics" in June 2003, the category of "Accent on application", article Lasers assist the Blind. More detailed information about canes Laser Cane" available on the Internet at the website www.lasercane.com/lasercane.htm.

The disadvantage of canes Laser Cane" is that directly in the operation of the direction of location of the rays relative to the axis of the stick cane remains unchanged, and the user may at any time movement wishes to change the angle of the radar beams relative to the axis of the stick cane.

Known and other canes for the blind (ed. mon. The USSR No. 957.901, 1.503.809, 1.738.283; RF patents №№2.064.789, 2.184.518, 2.280.429; U.S. patent No. 3.646.949, 3.881.504, 5.197.502, 5.341.829, 5.445.175; patent EP No. 0.016.606, 1.025.828; Cognac R.S. white cane // Our life, 1997, No. 1. - S and others).

Known canes closest to the present invention is the Cane for the visually impaired" (patent RF №2.280.429, AN 3/06, 2006), which is selected as a prototype.

Famous cane for the visually impaired contains a stick with a handle, as well as associated electrical circuit priemysel, the processing unit and the detector. Priemysel installed in the sticks with the possibility of changing the angle of inclination to the axis of the poles in the plane of symmetry canes and provided with a means for operational control angle in the process the movement of the user.

An object of the invention is to enhance the functionality of a cane for the visually impaired by transmitting radio alarm responders, doctors or relatives in case of emergency.

The problem is solved in that the cane for the visually impaired, containing in accordance with the closest analogue stick with the handle and interconnected electric chain priemysel mounted on sticks, with the possibility of changing the angle of inclination to the axis of the poles in the plane of symmetry of a cane, a processing unit, a power source and the detector, and priemysel provided with a means for operational control angle to the axis of the stick during the movement of the user differs from the closest analogue because it is equipped with a transmitter with antenna, power button, push-pull switch, relay and receiver with the antenna and to the source power supply connected in series button switch, a relay and a pendulum switch, the transmitter through the closed contacts of the relay and the power button is connected to the power source, the transmitter is designed in the form of cascaded oscillator, the phase manipulator, a second input connected to the output of a pseudorandom sequence generator and power amplifier, the output is vtorogo connected to the antenna, the receiver is made in the form of serially connected to the antenna amplifier high frequency delay line and a phase detector, a second input connected to the output of the amplifier high frequency, and the output is connected to the recording unit and alarm.

Figure 1 presents an example of executing a cane to cut. Structural diagram of a special sensor built in the cane, presented in figure 2. Block diagram of the receiver shown in figure 3. Timing diagrams explaining the principle of operation of the channel shown in figure 4.

The cane for the visually impaired stick contains 1, arm 2, priemysel 3, mounted in the handle by means of axis 4, block 5 of the information processing, the power source 6, a detector 7, the button 13 is on, the transmitter 14 and antenna 23, a pendulum switch, consisting of a pendulum 16 and ring 17. Axis 4 is perpendicular to the plane of symmetry of a cane. Structurally, priemysel, unit 5 of the information processing, the relay 18, the power source 6, a detector 7, the transmitter 14 and the push-pull switch (16, 17) located inside the handle 2 and interrelated electrical circuit 8. Priemysel 3 is installed with the possibility of changing the angle α of inclination of its axis 9 orientation relative to the axis 10 of the symmetry of the stick 1 in a common plane of symmetry of the stick 1 and arm 2, i.e. in the plane of symmetry of the grow. To premisljati 3 attached to the lever 11 management, the free end of which is placed on the side surface 12 of the handle 2. Priemysel 3 is equipped with a return spring 15, one end of which is secured to the handle 2 and the other end connected with premoistened 3.

In General, the cane operates as follows.

When positioning the free end of the lever 11 of the control on the end part 12 of the surface of the handle 2, the direction of the axis 9 in the direction of piemaisijies 3 about the axis 10 of the symmetry of the stick 1 may be promptly recorded by the user, for example, by means of the thumb acting on the lever 11 of the control.

In the presence of the return spring 15, one end secured to the handle 2, and the other is connected with premoistened 3, the position of the axis 9 in the direction of piemaisijies 3 about the axis 10 of the symmetry of the stick 1 is uniquely determined, namely in the absence of effects on the lever 11 control user priemysel 3 is at the home position, predetermined by the user.

When leaving the visually impaired presses the button 13 of inclusion, which is located on the end of the front part 12 of the handle 2. In case of extreme situations, for example, if a visually impaired fainted or slipped, broke his leg, felt towel ill and dropped the cane, the latter, being in a horizontal position, Autonomous radio contact with the rescue, the nearest medical centre or relatives of the visually handicapped.

It is in extreme situations, when the cane is in the horizontal position, i.e. when the visually impaired dropped the cane for some valid reason, the pendulum 16 is in contact with the metal ring 17, is placed inside the stick 1, and closes the electrical circuit of the power relay 18 from the power source 6 through the closed button 13 power-on. Relay 18 operates and closes its contacts 18.1, through which the transmitter 14 receives power from the power source 6.

In this case, the master oscillator 19 generates a high frequency oscillation (figure 4, a):

u_c(t)=U_ccos(ω_ct+ & Phi;_c), 0≤t≤T_c,

where U_c, ω_cthat & Phi;_c, T_c- amplitude, carrier frequency, initial phase, and the duration of high-frequency oscillations,

which arrives at the first input of the phase manipulator 21. To the second input of the latter is served modulating code M(t) (figure 4, b) from the output of the generator 20 pseudo-random sequence (SRP). Moreover, the modulating code M(t) in digital form contains all the necessary information about the visually impaired, for example surname, name, patronymic, year of birth, home address, phone number, degree of disability, etc.

u₁(t)=U_withcos[ω_ct+ & Phi;_k(t)+ φ_c], 0≤t≤T_c,

where φ_k(t)={0,π} - manipulated component phases, reflecting the law of phase manipulation in accordance with the modulating code M(t) (figure 4, b), with φ_k(t)=const when kτ_E<t<(k+1)τ_Eand may change abruptly at t=kτ_Ei.e. at the boundaries between elementary parcels (k=1, 2, ..., N-1);

τ_EN - the length and number of basic assumptions which form the signal duration T_with(T_with=N·τ_E).

This signal, after amplification by the power amplifier 22 of the power radiated by the antenna 23 in the ether, is captured by the antenna 24 and through the amplifier 26 high frequency is supplied to the information input of the phase detector 28 and to the input 27 of the delay, the delay time τ_Cwhich is equal to the duration of elementary parcels τ_E(τ_C=τ_E). The output line 27 of the delay is generated QPSK signal (figure 4, g):

u₂(t)=u₁(t-τ_C)=U_ccos[ω_c(t-τ_C) + & Phi;_k(t+τ_C) + & Phi;_c],

which is fed to the reference input of phase detector 28.

A necessary condition for simultaneous detection of QPSK signals using the phase detector 28 is supporting n the voltage. In this case, the reference voltage for each subsequent elementary parcel is previous elementary parcel, delayed by time τ_C=τ_E.

In the synchronous detection on the output of the phase detector 28 is formed of a low-frequency voltage (figure 4, d):

u_n(t)=U_nPF_k(t), 0≤t≤T_c,

where,

proportional to the modulating code M(t) (figure 4, b). This voltage is recorded by the unit 29 registration and includes a detector 30 which produces an alarm (audible or visual).

The receiver 25 can be equipped with rescue services, medical centers and relatives of the visually handicapped.

Complex FMN-alarm emitted by a cane for the visually impaired, can be adopted and mobile phones, which are equipped with stakeholders.

When returning home the visually impaired re-presses the button 13 on and disables the transmitter 14 from the power source 6 in order to avoid false alarms, when the cane may take for some reason the horizontal position.

Button 13 enable structurally designed in such a way that for each odd its narimani she closes the contacts, and at every even-numbered interrupts.

Thus, the proposed cane for the visually impaired in comparison with the prototype and the other technical solutions for a similar purpose provides transmission via radio alarm responders, doctors or relatives in case of emergency.

At the same time as the alarm is used FMN complex signal that contains necessary information about the visually impaired, for example surname, name, patronymic, year of birth, home address, phone number, degree of disability, etc.

Complex FMN-signals open a wide variety of technique of transmission of alarm messages. They allow you to apply a new type selection - structural selection. This means that it is possible to separate signals operating in the same frequency band and at the same time.

Thus the functionality of a cane for the visually impaired expanded.

The cane for the visually impaired, containing a stick with a handle hosting priemysel mounted on sticks, with the possibility of changing the angle of inclination to the axis of the poles in the plane of symmetry of a cane, a processing unit, a power source and the detector, and priemysel provided with a means for operational control angle to the axis of the stick during the movement of the user, characterized in that it is further provided with a transmitter for radiating antenna, power button, push-pull switch, relay and receiver from catching the antenna, and a power source serially connected to the received power button, relay and pendulum switch, the transmitter through the closed contacts of the relay and the power button is connected to the power source, the transmitter is made in the form of series-connected sets of high-frequency generator, a phase manipulator, a second input connected to the output of a pseudorandom sequence generator and power amplifier, the output of which is connected to the radiating antenna and the receiver is made in the form of sequentially connected to catching antenna amplifier high frequency delay line and a phase detector, a second input connected to the output of the amplifier high frequency, and the output is connected to the recording unit and the detector alarm.