CN2493987Y

CN2493987Y - Alarm for blind person crossing street

Info

Publication number: CN2493987Y
Application number: CN 01229320
Authority: CN
Inventors: 宋建军; 陈钢; 陈军
Original assignee: TEDA ELECTROMECHANICAL (TIANJIN) CO Ltd
Current assignee: TEDA ELECTROMECHANICAL (TIANJIN) CO Ltd
Priority date: 2001-06-28
Filing date: 2001-06-28
Publication date: 2002-05-29
Anticipated expiration: 2011-06-28

Abstract

The utility model discloses a reminding device which is used for the blind to go across a street, comprising a housing, a base, a loudspeaker, a circuit board, a signal sampling circuit, a rectifying circuit, an audio effect circuit and an audio amplifying circuit. When a green traffic light in east-west direction is lightened, the loudspeaker gives a bright and euphonious sound which suggests the blind waiting at the east-west crossing to go across the street; and when the green traffic light in north-south direction is lightened, the loudspeaker gives another bright and euphonious sound which suggests the blind waiting at the north-south crossing to go across the street. The reminding device for the blind going across the street has the advantages of simple structure, low cost, and can be matched with existing traffic signal light device, which is convenient in popularization and generalization and brings huge economic benefit and social benefit.

Description

The blind person crosses the street reminiscences

The utility model relates to a kind of traffic signal devices, especially relates to a kind of sound traffic signal devices.

At present, the stop-gi sugbal device is adopted at crossing, China urban street mostly, and this traffic signal devices does not all possess for the blind person crosses the function that the street provided the street information.This defective of existing traffic signal devices is noticed in some big city in the recent period, beginning has increased the function that the street signal was provided for the blind person with sound in traffic signal devices, but substantially all be to copy external like product, the circuit structure complexity of its voice signal reminiscences, the cost height, and design the overall price costliness with the traffic signaling equipment one.Therefore, be difficult to generally promote the use of in China cities and towns.

The purpose of this utility model is, provide a kind of simple in structure, cost is low, and can cross the street reminiscences with the blind person that present any traffic signal devices coupling is used.

The purpose of this utility model is achieved through the following technical solutions: this blind person crosses the street reminiscences and comprises: loudspeaker, shell, circuit board, base, loudspeaker is fixed on the shell, circuit board is fixed on the base, circuit on the circuit board comprises: signals collecting and power circuit, sound effect circuit and audio amplifier circuit, two input ends of signals collecting and power circuit are connected in parallel on the traffic lights two ends that P Passable is represented at the crossing.

Signals collecting on the foregoing circuit plate and power circuit, the connected mode of sound effect circuit and audio amplifier circuit is: the parallel connection of primary windings of transformer is represented the traffic lights two ends of P Passable at the crossing, its parallel connection of secondary windings is on two input ends of silicon stack rectifier, be parallel with a filter capacitor between two output terminals of above-mentioned silicon stack rectifier, positive pole in the above-mentioned silicon stack rectifier output end also links to each other with the positive source of an IC amplifier and the input end of a stabilivolt respectively, negative pole in the above-mentioned silicon stack rectifier output end links to each other with the earth terminal of above-mentioned stabilivolt and ground connection, the output terminal of above-mentioned stabilivolt links to each other with the positive source of an audio IC chip, the power cathode ground connection of above-mentioned audio IC chip, an end ground connection in two output terminals of above-mentioned audio IC chip, link to each other with the sliding end of a potentiometer after the other end and the capacitors in series, an end ground connection in two stiff ends of above-mentioned potentiometer, the other end links to each other with above-mentioned IC amplifier input terminal, the power cathode ground connection of above-mentioned IC amplifier, link to each other another input end grounding of above-mentioned loudspeaker with an input end of above-mentioned loudspeaker after the output terminal of above-mentioned IC amplifier and the capacitors in series.

In order to use this blind person to cross the street reminiscences, in advance definite two kinds of loud euphonies (for example two kinds of different tweedles) are represented the sound traffic signals that East and West direction is current and the north-south is current respectively, and these two kinds of voice signals are recorded to respectively in two audio IC chips in blind person's reminiscences, then, the input end of again these two blind persons being crossed the street reminiscences East and West direction that is connected in parallel on the crossing is respectively represented the traffic lights of P Passable and the traffic lights two ends that P Passable is represented in the north-south.

The principle of work that this blind person crosses the street reminiscences is: when the traffic lights of expression East and West direction P Passable are bright, the primary coil that the blind person who is connected in parallel on these traffic lights two ends crosses the transformer of street reminiscences collects the ac signal of expression East and West direction P Passable, through the transformer step-down, ac signal after the step-down of its secondary coil output is through the silicon stack rectifier rectification, the DC voltage of its output terminal output is through being the power supply of IC amplifier behind the capacitor filtering, after this DC voltage process stabilivolt voltage stabilizing is audio IC chip power supply, the output terminal of audio IC chip just can be exported a current sound signal of expression East and West direction, this sound signal is added to the IC amplifier input terminal through a capacitance and potentiometer, obtain a sound signal that the expression East and West direction of having amplified is current at its output terminal, this signal makes signal pure more after handling through a block condenser again, be added on the loudspeaker then, loudspeaker just sends a kind of euphony of making an appointment, and the blind person hears that this voice signal knows that just this moment can be by the East and West direction crossing.Regulator potentiometer can the control loudspeaker volume size.Because the current traffic lights in north-south this moment extinguish, its two ends no-voltage signal is crossed the street reminiscences and is not worked so be connected in parallel on the blind person at traffic lights two ends, north-south.

As a same reason, when the P Passable of north-south, the blind person who is connected in parallel on the traffic lights two ends of expression north-south P Passable crosses the street reminiscences by above-mentioned principle work, its loudspeaker sends the euphony of making an appointment, and the blind person hears that this voice signal knows that just this moment can be by the crossing, north-south.Regulator potentiometer can the control loudspeaker volume size.Because the current traffic lights of East and West direction this moment extinguish, its two ends no-voltage signal is crossed the street reminiscences and is not worked so be connected in parallel on the blind person at East and West direction traffic lights two ends.

The advantage that blind person of the present utility model crosses the street reminiscences is: simple in structure, cost is low, compatibility is strong.The existing various traffic signaling equipments of China all can be crossed the street reminiscences with this blind person and be used, and realize when can passing through the crossing with voice signal prompting blind person.Therefore, be convenient to universal the use in the vast cities and towns of China.Its application space is wide, and economic benefit and social benefit are all very huge.

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

Fig. 1 crosses the structural representation of street reminiscences embodiment for blind person of the present utility model;

Fig. 2 crosses the circuit block diagram of street reminiscences embodiment for blind person of the present utility model;

Fig. 3 crosses the circuit connection diagram of street reminiscences embodiment for blind person of the present utility model.

As shown in Figure 1, the blind person crosses the street reminiscences and comprises circuit board 3, shell 2, base 4 and loudspeaker 1, and circuit board 3 is screwed on base 4, and shell 2 and base 4 are connected by screw, and loudspeaker 1 is screwed on shell 2.

As shown in Figure 2, cross in the reminiscences circuit of street the blind person, the parallel connection of primary windings that is used for gathering the transformer 5 of right of way signal is represented the traffic lights two ends of passing through at the crossing, its parallel connection of secondary windings is between two input ends of 3A/50V silicon stack rectifier 6, be parallel with the electrolytic condenser 7 of one 2000 μ F between two output terminals of silicon stack rectifier 6, positive pole in silicon stack rectifier 6 output terminals also links to each other with the positive source of TDA1521 type IC amplifier 12 and the input end of 7805 type stabilivolts 9 respectively, negative pole in silicon stack rectifier 6 output terminals links to each other with the earth terminal of stabilivolt 9 and ground connection, the output terminal of stabilivolt 9 links to each other with the positive source of MX-01 type audio IC chip 10, the power cathode ground connection of audio IC chip 10, an end ground connection in two output terminals of audio IC chip 10, the other end links to each other with the sliding end of 4.7K Ω potentiometer 11 with capacitor 8 series connection backs, an end ground connection in two stiff ends of potentiometer 11, the other end links to each other with the input end of IC amplifier 12, the power cathode ground connection of IC amplifier 12, the output terminal of IC amplifier 12 links to each other another input end grounding of loudspeaker 1 with 1000 μ F capacitors, 13 series connection backs with an input end of loudspeaker 1.Said ground connection refers to that all the shell of crossing the street reminiscences with the blind person is electrically connected in this instructions.

The course of work that the blind person of present embodiment crosses the street reminiscences is: each blind person in parallel crosses the street reminiscences at the two ends of the current green traffic lamp of current green traffic lamp of expression East and West direction and expression north-south, cross the blind person in parallel and to have recorded the current lark cry in expression East and West direction crossing in the audio IC chip 10 of street reminiscences in advance with the East and West direction green traffic lamp, and the blind person in parallel with the north-south green traffic lamp current golden orioles cry in expression crossing, north-south of having crossed in audio IC chip 10, having recorded in advance of street reminiscences.When the East and West direction green light at crossing is bright, the primary coil that is connected in parallel on the transformer 5 at these green traffic lamp two ends collects 220 volts of current ac signals of East and West direction, through these transformer 5 step-downs, the ac signal that its secondary output is 12 volts, this ac signal is through 6 rectifications of silicon stack rectifier, after DC voltage process capacitor 7 filtering of its output terminal output is 12 power supplies of IC amplifier, after these DC voltage process stabilivolt 9 voltage stabilizings is 10 power supplies of audio IC chip, the output terminal of audio IC chip 10 just can be exported the sound signal of the current lark cry of expression East and West direction, this sound signal is added to the input end of IC amplifier 12 through block condenser 8 and potentiometer 11, obtain a sound signal that the East and West direction of having amplified is current at its output terminal, this signal makes signal pure more after handling through block condenser 13, be added to then on the loudspeaker 1, loudspeaker 1 just sends melodious lark cry, waits blind person at the East and West direction crossing and hears that the lark cry knows that just this moment can be by the crossing.Regulator potentiometer 11 is controlled at the 60-65 decibel with the volume of loudspeaker 1.Because this moment, the north-south green light extinguished, its two ends no-voltage signal is crossed the street reminiscences and is not worked so be connected in parallel on the blind person at green traffic lamp two ends, north-south.

When the north-south at crossing green light is bright, the primary coil that is connected in parallel on the transformer 5 at these green traffic lamp two ends collects 220 volts of current ac signals of East and West direction, through these transformer 5 step-downs, the ac signal that its secondary output is 12 volts, this ac signal is through 6 rectifications of silicon stack rectifier, after DC voltage process capacitor 7 filtering of its output terminal output is 12 power supplies of IC amplifier, after these DC voltage process stabilivolt 9 voltage stabilizings is 10 power supplies of audio IC chip, the output terminal of audio IC chip 10 just can be exported the sound signal of the current lark cry of expression East and West direction, this sound signal is added to the input end of IC amplifier 12 through block condenser 8 and potentiometer 11, obtain a sound signal that the East and West direction of having amplified is current at its output terminal, this signal makes signal pure more after handling through block condenser 13, be added to then on the loudspeaker 1, loudspeaker 1 just sends melodious golden orioles cry, waits blind person at the crossing, north-south and hears that the golden orioles cry knows that just this moment can be by the crossing.Regulator potentiometer 11 is controlled at the 60-65 decibel with the volume of loudspeaker 1.Because this moment, the East and West direction green light extinguished, its two ends no-voltage signal is crossed the street reminiscences and is not worked so be connected in parallel on the blind person at East and West direction green traffic lamp two ends.

Claims

1. a blind person crosses the street reminiscences, comprise loudspeaker (1), shell (2), circuit board (3), base (4), loudspeaker (1) is fixed on the shell (2), circuit board (3) is fixed on the base (4), it is characterized in that: the circuit on the circuit board (3) comprises signals collecting and power circuit (14), sound effect circuit (15) and audio amplifier circuit (16), and two input ends of signals collecting and power circuit (14) are connected in parallel on the two ends of crossing green traffic lamp.

2. blind person according to claim 1 crosses the street reminiscences, it is characterized in that: signals collecting on the described circuit board (3) and power circuit (14), the connected mode of sound effect circuit (15) and audio amplifier circuit (16) is: the parallel connection of primary windings of transformer (5) is represented the two ends of the traffic lights of P Passable at the crossing, its parallel connection of secondary windings is on two input ends of silicon stack rectifier (6), be parallel with a filter capacitor (7) between two output terminals of silicon stack rectifier (6), positive pole in silicon stack rectifier (6) output terminal also links to each other with the input end of stabilivolt (9) and the positive source of IC amplifier (12) respectively, negative pole in silicon stack rectifier (6) output terminal links to each other with the earth terminal of stabilivolt (9) and ground connection, the output terminal of stabilivolt (9) links to each other with the positive source of audio IC chip (10), the power cathode ground connection of audio IC chip (10), an end ground connection in two output terminals of audio IC chip (10), the other end links to each other with the sliding end of potentiometer (11) with capacitor (8) series connection back, an end ground connection in two stiff ends of potentiometer (11), the other end links to each other with the input end of IC amplifier (12), the power cathode ground connection of IC amplifier (12), the output terminal of IC amplifier (12) links to each other another input end grounding of loudspeaker (1) with capacitor (13) series connection back with an input end of loudspeaker (1).