CN202929207U - Path-exploring apparatus for the blind - Google Patents
Path-exploring apparatus for the blind Download PDFInfo
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- CN202929207U CN202929207U CN 201220650489 CN201220650489U CN202929207U CN 202929207 U CN202929207 U CN 202929207U CN 201220650489 CN201220650489 CN 201220650489 CN 201220650489 U CN201220650489 U CN 201220650489U CN 202929207 U CN202929207 U CN 202929207U
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Abstract
Provided is a path-exploring apparatus for the blind, comprising a single-chip microcomputer, a supersonic wave emitter, a supersonic wave receiver, an alarm module, and a battery for providing DC source for each part, wherein the supersonic wave emitter is connected with the single-chip microcomputer for emitting the supersonic wave signals generated by the single-chip microcomputer; the supersonic wave receiver is connected with the single-chip microcomputer for amplifying and shaping the received supersonic wave signals and then transmitting to the interruption port of the single-chip microcomputer; the single-chip microcomputer processes the supersonic wave signals; the single-chip microcomputer is connected with the alarm module and controls the operation of the alarm according to the processed results; and when the distance to the front obstacle is less than the set safe distance, a warning sound is made to tell the blind to be aware of the obstacle ahead. The path-exploring device is installed upon a path-exploring rod, with the exploring scope unaffected by the length of the path-exploring rod. Before the path-exploring rod encounters the obstacle, the user can know whether there exists obstacle within the safe distance in front or not.
Description
Technical field
The utility model relates to a kind of blind seeking device that is arranged on the blind seeking bar.
Background technology
The blind person refers to the people that eyes are blind, it takes action very inconvenient in life, especially be easy to encounter the barriers such as wall, desk or large tree when walking, in order to prevent from encountering barrier, the blind person is general when walking all can the hand-held bar of exploring the way be used to exploring the way, and to survey the place ahead, whether barrier is arranged, if when the bar of exploring the way is encountered barrier, blind person's walking of just can detouring is to get around barrier.Tradition explore the way bar because simple in structure, make the favor that easily is subject to the blind person, but there are the following problems for this bar of exploring the way: it is oversize that the bar of exploring the way can not be done, and oversize easily affects other people walking, so its investigative range (being the place ahead safe distance) is limited; The bar of exploring the way is obstacle information could be passed to the blind person in the situation that encounter barrier, when the bar of exploring the way is encountered barrier, if barrier is to be positioned at other people of blind person the place ahead, easily stab other people, if barrier is automobile or other valuables, easily damage these article.
Summary of the invention
The purpose of this utility model is to provide a kind of blind seeking device, and it is installed on the bar of exploring the way, and makes the impact of pole length of not explored the way of the investigative range of the bar of exploring the way, and namely in the safe distance of the place ahead, whether barrier is arranged as can be known before the bar of exploring the way is encountered barrier.
blind seeking device described in the utility model, comprise single-chip microcomputer, ultrasonic transmitter, ultrasonic receiver, alarm module and the battery that direct supply is provided to various piece, ultrasonic transmitter is connected with single-chip microcomputer, the ultrasonic signal that single-chip microcomputer produces is launched, ultrasonic receiver is connected with single-chip microcomputer, with the ultrasonic signal amplification shaping that receives and the middle fracture of delivering to single-chip microcomputer, single-chip microcomputer is processed ultrasonic signal, single-chip microcomputer is connected with alarm module, control alarm module work according to result, in the time that the distance of barrier being less than the safe distance of its setting forwardly, send the chimes of doom reminding blind and note the place ahead barrier.
further, described ultrasonic transmitter comprises driving circuit and emitting head, driving circuit is used for driving emitting head, and this driving circuit is comprised of the first Sheffer stroke gate, the 12 resistance, the first triode, the 11 resistance, the first phase inverter, the second phase inverter, the 6th electric capacity, the 14 resistance, the second triode, the 13 resistance, the 3rd phase inverter and the 4th phase inverter, wherein, the input end of the first Sheffer stroke gate is connected with the ultrasound wave delivery outlet of single-chip microcomputer, output terminal connects the base stage of the first triode by the 12 resistance, the grounded emitter of the first triode, collector connects direct supply by the 11 resistance, the first phase inverter is in parallel with the second phase inverter, first, the collector of input termination first triode of the second phase inverter, one end of output termination the 6th electric capacity, the other end of the 6th electric capacity connects an end of emitting head, the base stage of the second triode connects the ultrasound wave delivery outlet of single-chip microcomputer by the 14 resistance, grounded emitter, collector connects direct supply by the 13 resistance, the 3rd phase inverter is in parallel with the 4th phase inverter, the 3rd, the collector of input termination second triode of the 4th phase inverter, output terminal connects the other end of emitting head, thereby make emitting head have enough and symmetrical drive current.
further, described ultrasonic receiver comprises Receiver, signal amplification circuit, detecting circuit, signaling conversion circuit and error correction circuit, signal amplification circuit is used for running into barrier and reflects the feeble signal amplification that received head receives, detecting circuit is used for extracting the ultrasonic signal of the signal after amplifying, signaling conversion circuit is used for converting the ultrasonic signal after detection to single-chip microcomputer treatable square-wave signal, and error correction circuit is used for preventing that single-chip microcomputer from misreading, the two-stage amplifying circuit of described signal amplification circuit for being consisted of by the first operational amplifier, the second operational amplifier and resistance, electric capacity, detecting circuit is comprised of the 3rd electric capacity, the 4th electric capacity, the first diode, the second diode, signaling conversion circuit by the the 8th, the 9th, the tenth, the 15 resistance and comparer form, error correction circuit by second, third, the 4th Sheffer stroke gate forms, wherein, the input termination Receiver of signal amplification circuit, one end of output termination the 3rd electric capacity, the positive pole of another termination the first diode of the 3rd electric capacity, the negative pole of the first diode connects the input end in the same way of comparer, the negative pole of the second diode connects the positive pole of the first diode, plus earth, the 4th electric capacity is connected between the negative pole and ground of the first diode, one termination direct supply of the 8th resistance, one end of another termination the tenth resistance, the other end ground connection of the tenth resistance, the reverse input end of comparer connects the tie point of the 8th resistance and the tenth resistance, power supply termination direct supply, earth terminal ground connection, one end of output termination the 9th resistance, one end of another termination the 15 resistance of the 9th resistance, the other end ground connection of the 15 resistance, the first input end of the second Sheffer stroke gate connects the tie point of the 9th resistance and the 15 resistance, the second input end connects the error correction signal delivery outlet of single-chip microcomputer, the 3rd Sheffer stroke gate and the 4th Sheffer stroke gate are connected to form rest-set flip-flop, an input end of output termination the 3rd Sheffer stroke gate of the second Sheffer stroke gate, an input end of the 4th Sheffer stroke gate connects the error correction signal delivery outlet of single-chip microcomputer, the output terminal of the 3rd Sheffer stroke gate connects the middle fracture of single-chip microcomputer.
In use, this blind seeking device is arranged on the bar of exploring the way, carries out opening/closing operation by the switch on the bar of exploring the way.
Its principle of work is as follows:
open the switch on the bar of exploring the way, this blind seeking device energising work, after the single-chip microcomputer initialization, produce the ultrasonic signal of certain frequency according to the program of inner setting, and beginning timing, this ultrasonic signal is launched by emitting head, when running into barrier, ultrasonic signal is reflected back, Receiver receives the ultrasonic signal that reflects, send into after treatment the middle fracture of single-chip microcomputer, after single-chip microcomputer detects this signal, stop timing, and by corresponding computing formula S=C*T/2, (wherein, C is hyperacoustic velocity of sound, T is timing time) obtain the distance of barrier, the safe distance L that single-chip microcomputer will be somebody's turn to do apart from S and single-chip microcomputer inner setting compares, if S＜L, single-chip microcomputer output corresponding control signal, the control alarm module is reported to the police, reminding blind attention deficit disorder thing, if S 〉=L, alarm module can not send chimes of doom, the blind person can continue to move ahead, until just need take a devious route after hearing chimes of doom.
The utility model employing ultrasound wave is measured the obstacle distance in blind person the place ahead, the length of bar of exploring the way can not affect its investigative range, when exploring the way, the bar of exploring the way needn't contact barrier, as long as the distance of barrier is less than the safe distance of setting, after hearing chimes of doom, the blind person namely knows the existence of this barrier, thereby the bar of having avoided exploring the way stabs or damages barrier.
Description of drawings
Fig. 1 is circuit measuring theory diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of ultrasonic transmitter in the utility model.
Fig. 3 is the circuit theory diagrams (not comprising error correction circuit) of ultrasonic receiver in the utility model.
Fig. 4 is the error correction circuit schematic diagram of ultrasonic receiver in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Blind seeking device as shown in Figure 1, comprise single-chip microcomputer 1, ultrasonic transmitter 2, ultrasonic receiver 3, alarm module 4 and the battery 5 that direct supply VCC is provided to various piece, ultrasonic transmitter 2 is connected with single-chip microcomputer 1, ultrasonic receiver 3 is connected with single-chip microcomputer 1, and single-chip microcomputer 1 is connected with alarm module 4.That describes in the utility model connects the positive pole that direct supply VCC is finger battery 5, and ground connection is the negative pole of finger battery 5.
as shown in Figure 2, ultrasonic transmitter 2 comprises driving circuit and emitting head LS1, driving circuit is by the first Sheffer stroke gate U4A, the 12 resistance R 12, the first triode Q1, the 11 resistance R 11, the first phase inverter U3A, the second phase inverter U3B, the 6th capacitor C 6, the 14 resistance R 14, the second triode Q2, the 13 resistance R 13, the 3rd phase inverter U3C and the 4th phase inverter U3D form, the first phase inverter U3A, the second phase inverter U3B, the 3rd phase inverter U3C and the 4th phase inverter U3D adopt wherein four phase inverters in the CD4069 hex inverter, the first Sheffer stroke gate U4A adopts one of them Sheffer stroke gate in 74L,S00 42 input nand gates, wherein, 1 pin of 74L,S00 42 input nand gates, 2 pin all are connected with the ultrasound wave delivery outlet CLK40 of single-chip microcomputer 1, 3 pin connect the base stage of the first triode Q1 by the 12 resistance R 12, the grounded emitter of the first triode Q1, collector meets direct supply VCC by the 11 resistance R 11, 11 pin of CD4069 hex inverter are connected with 13 pin, and connect simultaneously the collector of the first triode Q1, 10 pin are connected with 12 pin, and connect simultaneously an end of the 6th capacitor C 6, the other end of the 6th capacitor C 6 connects the end of emitting head LS1, the base stage of the second triode Q2 meets the ultrasound wave delivery outlet CLK40 of single-chip microcomputer 1 by the 14 resistance R 14, grounded emitter, collector meets direct supply VCC by the 13 resistance R 13, 5 pin of CD4069 hex inverter are connected with 9 pin, and connect simultaneously the collector of the second triode Q2, 6 pin are connected with 8 pin, and connect simultaneously the other end of emitting head LS1.
As shown in Figure 3, Figure 4, ultrasonic receiver 3 comprises Receiver LS2, signal amplification circuit, detecting circuit, signaling conversion circuit and error correction circuit; Signal amplification circuit is the two-stage amplifying circuit that is comprised of the first operational amplifier U1A, the second operational amplifier U1B, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the first capacitor C 1, the second capacitor C 2 and the 5th capacitor C 5, and the first operational amplifier U1A, the second operational amplifier U1B adopt two operational amplifiers in LM833 audio frequency dual operational amplifier; Detecting circuit is comprised of the 3rd capacitor C 3, the 4th capacitor C 4, the first diode D1, the second diode D2; Signaling conversion circuit is comprised of the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 15 resistance R 15 and comparer U2A, comparer U2A adopts one of them operational amplifier in the LM358 dual operational amplifier, it is operated in open loop situations, is equivalent to a comparer; Error correction circuit is comprised of the second Sheffer stroke gate U4B, the 3rd Sheffer stroke gate U4C and the 4th Sheffer stroke gate U4D, and the second Sheffer stroke gate U4B, the 3rd Sheffer stroke gate U4C, the 4th Sheffer stroke gate U4D adopt other three Sheffer stroke gates in foregoing 74L,S00 42 input nand gates.wherein, the 5th resistance R 5 is connected in parallel on Receiver LS2 two ends, the end ground connection of Receiver LS2, one end of another termination the first capacitor C 1, the other end of the first capacitor C 1 connects 2 pin of LM833 audio frequency dual operational amplifier by the 3rd resistance (R3), 3 pin of LM833 audio frequency dual operational amplifier are by the 5th capacitor C 5 ground connection, 8 pin ground connection, 4 pin meet direct supply VCC, 1 pin connects an end of the second capacitor C 2, the other end of the second capacitor C 2 connects 6 pin of LM833 audio frequency dual operational amplifier by the 4th resistance R 4, 5 pin of LM833 audio frequency dual operational amplifier connect 3 pin of LM833 audio frequency dual operational amplifier, and meet direct supply VCC by the 6th resistance R 6, by the 7th resistance R 7 ground connection, 7 pin of LM833 audio frequency dual operational amplifier connect an end of the 3rd capacitor C 3, 2 pin of the first resistance R 1 one termination LM833 audio frequency dual operational amplifiers, 1 pin of another termination LM833 audio frequency dual operational amplifier, 6 pin of one termination LM833 audio frequency dual operational amplifier of the second resistance R 2, 7 pin of another termination LM833 audio frequency dual operational amplifier, the positive pole of another termination first diode D1 of the 3rd capacitor C 3, the negative pole of the first diode D1 connects 3 pin of LM358 dual operational amplifier, the negative pole of the second diode D2 connects the positive pole of the first diode D1, the plus earth of the second diode D2, the 4th capacitor C 4 is connected between the negative pole and ground of the first diode D1, one termination direct supply VCC of the 8th resistance R 8, one end of another termination the tenth resistance R 10, the other end ground connection of the tenth resistance R 10, 2 pin of LM358 dual operational amplifier connect the tie point of the 8th resistance R 8 and the tenth resistance R 10, 8 pin meet direct supply VCC, 4 pin ground connection, 1 pin connects an end of the 9th resistance R 9, one end of another termination the 15 resistance R 15 of the 9th resistance R 9, the other end ground connection of the 15 resistance R 15, 4 pin of 74L,S00 42 input nand gates connect the tie point of the 9th resistance R 9 and the 15 resistance R 15, 5 pin meet the error correction signal delivery outlet ENABLE of single-chip microcomputer 1, 6 pin of 74L,S00 42 input nand gates are connected with 9 pin, 10 pin are connected with 11 pin, 12 pin are connected with 8 pin, 13 pin meet the error correction signal delivery outlet ENABLE of single-chip microcomputer 1, and 8 pin of 74L,S00 42 input nand gates meet the middle fracture INT0 of single-chip microcomputer 1.
In use, above-mentioned blind seeking device is arranged on the bar of exploring the way, carries out opening/closing operation by the switch on the bar of exploring the way.
Its principle of work is as follows:
open the switch on the bar of exploring the way, connect battery 5, this blind seeking device energising work, after single-chip microcomputer 1 initialization, produce the ultrasonic signal (being the unipolarity square-wave signal of 40KHz) of 40KHz according to the program of inner setting, and beginning timing, this ultrasonic signal is exported and is divided into two-way from the ultrasound wave delivery outlet CLK40 of single-chip microcomputer 1, one the tunnel through the first Sheffer stroke gate U4A, the 12 rear base stage to the first triode Q1 of resistance R 12, another Lu Jingdi 14 rear base stages to the second triode Q2 of resistance R 14, two triodes all are operated on off state, when this ultrasonic signal is high level, the first triode Q1 cut-off, the second triode Q2 conducting, when this ultrasonic signal is low level, the first triode Q1 conducting, the second triode Q2 cut-off, emitting head LS1 has symmetrical drive current, ultrasonic signal is launched by emitting head LS1, when running into barrier, ultrasonic signal is reflected back, Receiver LS1 receives the ultrasonic signal that reflects, amplify through the first operational amplifier U1A and the second operational amplifier U1B, through the first diode D1 and the second diode D2 detection, be converted to square-wave signal through comparer U2A again, the signal of the error correction signal delivery outlet ENABLE output of this square wave signal and unit machine 1 is input to the second Sheffer stroke gate U4B jointly, the 3rd Sheffer stroke gate U4C and the 4th Sheffer stroke gate U4D, from the second Sheffer stroke gate U4B, the signal of the 3rd Sheffer stroke gate U4C and the 4th Sheffer stroke gate U4D output is sent into the middle fracture INT0 of single-chip microcomputer 1, after single-chip microcomputer 1 detects this signal, stop timing, and by corresponding computing formula S=C*T/2, (wherein, C is hyperacoustic velocity of sound, T is timing time) obtain barrier apart from S, the safe distance L that single-chip microcomputer 1 will be somebody's turn to do apart from S and single-chip microcomputer 1 inner setting compares, if S＜L, single-chip microcomputer 1 output corresponding control signal, controlling alarm module 4 reports to the police, reminding blind attention deficit disorder thing, if S 〉=L, alarm module 4 can not send chimes of doom, the blind person can continue to move ahead, until just need take a devious route after hearing chimes of doom.
When not needing to use this blind seeking device, the switch of turning off on the bar of exploring the way gets final product.
Claims (3)
1. blind seeking device, it is characterized in that: comprise single-chip microcomputer (1), ultrasonic transmitter (2), ultrasonic receiver (3), alarm module (4) and the battery (5) that direct supply (VCC) is provided to various piece, ultrasonic transmitter is connected with single-chip microcomputer, the ultrasonic signal that single-chip microcomputer produces is launched, ultrasonic receiver is connected with single-chip microcomputer, with the ultrasonic signal amplification shaping that receives and the middle fracture of delivering to single-chip microcomputer, single-chip microcomputer is processed ultrasonic signal, single-chip microcomputer is connected with alarm module, control alarm module work according to result.
2. blind seeking device according to claim 1, it is characterized in that: described ultrasonic transmitter (2) comprises driving circuit and emitting head (LS1), and driving circuit is comprised of the first Sheffer stroke gate (U4A), the 12 resistance (R12), the first triode (Q1), the 11 resistance (R11), the first phase inverter (U3A), the second phase inverter (U3B), the 6th electric capacity (C6), the 14 resistance (R14), the second triode (Q2), the 13 resistance (R13), the 3rd phase inverter (U3C) and the 4th phase inverter (U3D), wherein, the input end of the first Sheffer stroke gate (U4A) is connected with the ultrasound wave delivery outlet (CLK40) of single-chip microcomputer (1), output terminal connects the base stage of the first triode (Q1) by the 12 resistance (R12), the grounded emitter of the first triode (Q1), collector connects direct supply (VCC) by the 11 resistance (R11), the first phase inverter (U3A) is in parallel with the second phase inverter (U3B), first, the second phase inverter (U3A, the collector of input termination the first triode (Q1) U3B), one end of output termination the 6th electric capacity (C6), the other end of the 6th electric capacity (C6) connects an end of emitting head (LS1), the base stage of the second triode (Q2) connects the ultrasound wave delivery outlet (CLK40) of single-chip microcomputer (1) by the 14 resistance (R14), grounded emitter, collector connects direct supply (VCC) by the 13 resistance (R13), the 3rd phase inverter (U3C) is in parallel with the 4th phase inverter (U3D), the 3rd, the 4th phase inverter (U3C, the collector of input termination the second triode (Q2) U3D), output terminal connects the other end of emitting head (LS1).
3. blind seeking device according to claim 1, it is characterized in that: described ultrasonic receiver (3) comprises Receiver (LS2), signal amplification circuit, detecting circuit, signaling conversion circuit and error correction circuit, described signal amplification circuit is by the first operational amplifier (U1A), the second operational amplifier (U1B) and resistance, the two-stage amplifying circuit that electric capacity consists of, detecting circuit is by the 3rd electric capacity (C3), the 4th electric capacity (C4), the first diode (D1), the second diode (D2) forms, signaling conversion circuit is by the 8th, the 9th, the tenth, the 15 resistance (R8, R9, R10, R15) and comparer (U2A) form, error correction circuit is by second, the 3rd, the 4th Sheffer stroke gate (U4B, U4C, U4D) form, wherein, the input termination Receiver (LS2) of signal amplification circuit, one end of output termination the 3rd electric capacity (C3), the positive pole of another termination the first diode (D1) of the 3rd electric capacity (C3), the negative pole of the first diode (D1) connects the input end in the same way of comparer (U2A), the negative pole of the second diode (D2) connects the positive pole of the first diode (D1), plus earth, the 4th electric capacity (C4) is connected between the negative pole and ground of the first diode (D1), one termination direct supply (VCC) of the 8th resistance (R8), one end of another termination the tenth resistance (R10), the other end ground connection of the tenth resistance (R10), the reverse input end of comparer (U2A) connects the tie point of the 8th resistance (R8) and the tenth resistance (R10), power supply termination direct supply (VCC), earth terminal ground connection, one end of output termination the 9th resistance (R9), one end of another termination the 15 resistance (R15) of the 9th resistance (R9), the other end ground connection of the 15 resistance (R15), the first input end of the second Sheffer stroke gate (U4B) connects the tie point of the 9th resistance (R9) and the 15 resistance (R15), the second input end connects the error correction signal delivery outlet (ENABLE) of single-chip microcomputer (1), the 3rd Sheffer stroke gate (U4C) is connected to form rest-set flip-flop with the 4th Sheffer stroke gate (U4D), an input end of output termination the 3rd Sheffer stroke gate (U4C) of the second Sheffer stroke gate (U4B), an input end of the 4th Sheffer stroke gate (U4D) connects the error correction signal delivery outlet (ENABLE) of single-chip microcomputer (1), the output terminal of the 3rd Sheffer stroke gate (U4C) connects the middle fracture (INT0) of single-chip microcomputer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220650489 CN202929207U (en) | 2012-11-30 | 2012-11-30 | Path-exploring apparatus for the blind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220650489 CN202929207U (en) | 2012-11-30 | 2012-11-30 | Path-exploring apparatus for the blind |
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| CN202929207U true CN202929207U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220650489 Expired - Fee Related CN202929207U (en) | 2012-11-30 | 2012-11-30 | Path-exploring apparatus for the blind |
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| CN (1) | CN202929207U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389499A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Invasive detection device with pair of acoustic wave energy converters with independent receiving and transmitting function |
| CN104898110A (en) * | 2015-06-23 | 2015-09-09 | 深圳乐行天下科技有限公司 | Supersonic wave emitter and balance vehicle system capable of following automatically |
| CN105283164A (en) * | 2013-10-03 | 2016-01-27 | 夏普株式会社 | Walking assistance device |
| CN113850985A (en) * | 2021-09-18 | 2021-12-28 | 国网山东省电力公司东营市河口区供电公司 | Automatic drainage control and early warning device for cable trench of transformer substation |
-
2012
- 2012-11-30 CN CN 201220650489 patent/CN202929207U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389499A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Invasive detection device with pair of acoustic wave energy converters with independent receiving and transmitting function |
| CN105283164A (en) * | 2013-10-03 | 2016-01-27 | 夏普株式会社 | Walking assistance device |
| CN105283164B (en) * | 2013-10-03 | 2017-10-10 | 夏普株式会社 | Device of walking aid |
| CN104898110A (en) * | 2015-06-23 | 2015-09-09 | 深圳乐行天下科技有限公司 | Supersonic wave emitter and balance vehicle system capable of following automatically |
| CN113850985A (en) * | 2021-09-18 | 2021-12-28 | 国网山东省电力公司东营市河口区供电公司 | Automatic drainage control and early warning device for cable trench of transformer substation |
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Granted publication date: 20130508 Termination date: 20131130 |