CN204170056U - A kind of embedded intelligence apparatus for guiding blind - Google Patents
A kind of embedded intelligence apparatus for guiding blind Download PDFInfo
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- CN204170056U CN204170056U CN201420585807.1U CN201420585807U CN204170056U CN 204170056 U CN204170056 U CN 204170056U CN 201420585807 U CN201420585807 U CN 201420585807U CN 204170056 U CN204170056 U CN 204170056U
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Abstract
This utility model discloses a kind of embedded intelligence apparatus for guiding blind, comprise master controller, FLASH memory, temperature sensor, ultrasonic sensor, A D transducer, liquid level sensor, voice announcer, GSM two's complementer, buzzer, alarm light and logic decoding circuit; Wherein, master controller adopts dsp chip; FLASH memory is connected with dsp chip and logic decoding circuit; Dsp chip is also connected with temperature sensor, ultrasonic sensor; Level sensor is connected with dsp chip by A/D converter; Voice announcer and GSM two's complementer all adopt serial ports to communicate with DPS chip; Buzzer is connected with DPS chip by amplifying circuit; Alarm light is connected with power circuit by switch; Advantage of the present utility model is: can detect the distance of blind person apart from preceding object thing in real time; When blind person needs to seek help, send seek help note or phone of seeking help; And surface gathered water information detected in real time; And there is alarm light at night.
Description
Technical field
This utility model relates to the technology that dsp processor, sensor technology, GPRS, voice broadcast etc. combine, and specifically, is a kind of embedded intelligence apparatus for guiding blind.
Background technology
Seeing-eye dog is a kind of mode leading blind person to go on a journey.Seeing-eye dog is long for cycle of training, and the price of buying and raising seeing-eye dog is very expensive, and most of blind person is unable bears this expense.
Guide subsidiary products is the another kind of selection mode of blind person's trip under new science and technology background.There is the deficiencies such as function ratio is more single, volume is larger, expensive in guide subsidiary products in the market.Design accurately keeps away barrier, diverse in function, compact, cheap guide equipment are focus and the difficult problem of guide area research.
Utility model content
In order to solve the problem, the utility model proposes a kind of embedded intelligence apparatus for guiding blind, go on a journey difficult problem mainly for blind person, utilize ultrasonic ranging theory to be embodied as blind person and to go on a journey navigation.
A kind of embedded intelligence apparatus for guiding blind, comprise master controller, FLASH memory, temperature sensor, ultrasonic sensor, A D transducer, level sensor, voice announcer, GSM two's complementer, CPLD logic decoding circuit, buzzer and alarm light.
Wherein, master controller adopts dsp chip, the control circuit having JTAG emulation interface and be made up of power circuit, clock circuit, reset circuit.FLASH memory is connected with dsp chip and logic decoding circuit.Dsp chip is also connected with temperature sensor, ultrasonic sensor.Level sensor is connected with dsp chip by A/D converter.Voice announcer and GSM two's complementer all adopt serial ports to communicate with DPS chip.Buzzer is connected with DPS chip by amplifying circuit.Alarm light is connected with power circuit by switch.The IO of logic decoding circuit input from the segment data line of dsp chip, part address wire,
serial clock BCLKX signal; The IO of outfan be FLASH memory chip selection signal, read signal, write signal, reset signal, get out signal; The clock signal of A/D conversion chip; The chip selection signal of gsm module, read signal, write signal; The chip selection signal of extended serial port peripheral hardware, read signal, write signal, master reset signal.
Described power circuit has ± 12V ,+5V ,+3.3V and+1.6V output voltage, and ± 12V and+5V voltage are powered to expanding peripherals respectively, and+3.3V and+1.6V voltage power to respectively the I/O interface of dsp chip and CPU core.
The utility model has the advantage of:
1, the new embedded intelligence apparatus for guiding blind of this practicality, can detect the distance of blind person apart from preceding object thing in real time, detecting distance is carried out real-time broadcasting by voice system or is reported to the police by buzzer;
2, the new embedded intelligence apparatus for guiding blind of this practicality, when blind person needs to seek help, can to seek help note or phone of seeking help to the seek help mobile phone transmission of people of setting by a key;
3, the new embedded intelligence apparatus for guiding blind of this practicality, surface gathered water information can be detected in real time, hydrops information is undertaken pointing out or being reported to the police by buzzer by voice system;
4, the new embedded intelligence apparatus for guiding blind of this practicality, has alarm light at night, and prompting vehicles or pedestrians are dodged blind person.
Accompanying drawing explanation
Fig. 1 is this utility model embedded intelligence apparatus for guiding blind overall structure block diagram.
In figure:
1-master controller 2-FLASH memorizer 3-temperature sensor
4-ultrasonic sensor 5-A D transducer 6-level sensor
7-voice announcer 8-GSM two's complementer 9-logic decoding circuit
10-buzzer 11-alarm light
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail.
This utility model embedded intelligence apparatus for guiding blind, comprise master controller 1, FLASH memory 2, temperature sensor 3, ultrasonic sensor 4, A D transducer 5, level sensor 6, voice announcer 7, GSM two's complementer 8, CPLD logic decoding circuit 9, buzzer 10 and alarm light 11.
Master controller 1 adopts dsp chip, and model is TMS320VC5416, has peripheral hardware and special instruction set in advanced correction Harvard structure, the CPU of dedicated hardware logic, on-chip memory, sheet.The control circuit that dsp chip has JTAG emulation interface and is made up of power circuit, clock circuit, reset circuit.DPS chip due to TMS320VC5416 model is twin voltage power supply chip, and wherein, I/O interface is+3.3V power voltage supply, and CPU and other all external logic are+1.6V power voltage supply.Therefore, power circuit of the present utility model has+1.6V and+3.3V voltage and exports, and be connected with+1.6V the voltage input pin of dsp chip and+3.3V voltage input pin respectively, guarantee DSP normally works.Clock circuit is the basis of dsp chip process digital information, and be also the main source producing electromagnetic radiation, whether its performance quality directly has influence on system and normally run, so clock circuit occupies vital status in Design of Digital System simultaneously.Clock circuit of the present utility model adopts the active crystal oscillator of 10MHz, and stable clock signal, electromagnetic interference is little, and clock circuit crystal oscillator output pin is connected with the clock pins of dsp chip.Reset circuit is guaranteed in this utility model apparatus for guiding blind power-up procedures, master controller 1 voltage and each expansion equipment (FLASH memory 2, temperature sensor 3, ultrasonic sensor 4, A D transducer 5, level sensor 6, voice announcer 7, GSM two's complementer 8) before voltage reaches requirement, dsp chip is in reset mode all the time, until master controller 1 voltage and expansion equipment voltage reach required level.If the voltage of power supply is once drop to below threshold value simultaneously, then forces dsp chip to enter reset mode, guarantee this utility model apparatus for guiding blind steady operation.In this utility model, reset circuit should guarantee reset low level time long enough (generally needing more than 20ms), ensures dsp chip reliable reset, and should ensure to have good stability, and prevents dsp chip from resetting by mistake; In reset circuit, the reset pin of reset key connects the reset pin of dsp chip, and the reset pin of dsp chip is connected to+3.3V voltage by pull-up resistor, and the reset pin of dsp chip is connected with the ground of reset key through charging capacitor.JTAG emulation interface is a kind of international standard test protocol, is mainly used in chip internal and tests and emulate system, tests.JTAG technology is a kind of embedded type debugging technology, and it encapsulates special test circuit TAP (Test Access Port, test access mouth) at chip internal, is tested internal node by special jtag test instrument.In this utility model, the JTAG emulation interface of dsp chip meets IEEE 1149.1 standard, is used for connecting dsp chip and external test tools, realizes the real time access to dsp chip.
Because above-mentioned dsp chip self is without FLASH memory 2, must consider the situation of this utility model apparatus for guiding blind offline operation when doing hardware designs, the storage of program code and solidification are the bases that system off-line runs.In embedded systems, in order to the off line realizing program is run automatically, program is generally all solidificated in the FLASH memory 2 of electric erasable.Therefore, in this utility model, realized storage and the solidification of each several part work order in this utility model apparatus for guiding blind by the FLASH memory 2 of expansion, realize the offline operation of this utility model apparatus for guiding blind.Wherein, data wire, the address wire of the data wire of dsp chip, address wire and FLASH memory 2 are connected respectively, the chip selection signal of FLASH memory 2, read signal, write signal are connected with the I/O logic pin of CPLD logic decoding circuit 9, are realized the simulation of FLASH memory 2 chip selection signal, read signal, write signal by CPLD logic decoding circuit 9.Described FLASH memory 2 is novel erasable non-volatile read only memory removed, belong to EEPROM device, compared with other ROM device, its memory capacity is large, volume is little, low in energy consumption, particularly it has the erasable and feature not needing programmable device erasable of in-system programmable components, make it become rapidly program code stored and nonvolatile memory that is significant data, become the requisite important devices of embedded system.
The control line of described temperature sensor 3 is connected with a GPIO pin of dsp chip, is used for measuring actual environment temperature in real time.Described temperature sensor 3 adopts 1-wire digital temperature sensor 3, has the certainty of measurement of 9 ~ 12, and temperature measurement range is-55 ~+125 DEG C, adopts+5V Power supply.Said temperature sensor 3 can Measurement accuracy ambient temperature, and capacity of resisting disturbance is strong, and conversion accuracy is high, and interface circuit is simple.
Described ultrasonic sensor 4 is the devices realizing acoustic-electric conversion, is also called ultrasonic transducer or ultrasound probe, can launches ultrasound wave, can receive again the hyperacoustic echo launched, and can convert the signal of telecommunication to.In this utility model, ultrasonic sensor 4 is connected with a GPIO pin of dsp chip, be used for the ultrasound wave of analog transmissions 40KHz, the echo that ultrasound wave meets barrier reflection is judged by the external interrupt pin of dsp chip, and carry out accurate timing by the timer internal of dsp chip, obtain the distance of ultrasound wave to barrier.Finding range of the present utility model is 0 ~ 3 meter.
Due to ultrasonic signal in atmosphere spread speed can increase with the rising of medium temperature, temperature often rises 1 DEG C, SVEL increases 0.6m/s, so the factor of variations in temperature will be considered in the measurements, actual environment temperature is measured in real time according to temperature sensor 3, temperature-compensating is carried out to hyperacoustic velocity of sound, reduces measurement error, improve range accuracy.
Described level sensor is hermetically sealed small-scale liquid level sensor 6, adopt MEMS technology, select high stability, high reliability sensor, and there is the amplifying circuit of high reliability, utilize the relation of pressure and liquid level direct ratio, export the analogue signal be directly proportional to tested liquid level.The analog signal output pin of level sensor is connected with the analog input pin of A/D converter 5.Middle-size and small-size liquid level sensor 6 range ability of this utility model is 0 ~ 1 meter, sensor diameter Φ 4mm, height 12mm.
The chip of above-mentioned A/D converter 5 is connected with one group of McBSP serial line interface (McBSP serial line interface is configured to SPI module) of dsp chip, because of the serial ports tranmitting data register of McBSP and the work clock of AD7887 reverse, so the serial ports tranmitting data register of McBSP is by after CPLD logic decoding circuit 9 software decoding, clock signal is oppositely exported by CPLD logic decoding circuit 9 one pins, and be connected with the work clock of AD7887, realize clock control.By DSP control A/D conversion chip, analog digital conversion is carried out to the analogue signal that level sensor exports.In this utility model, A/D conversion chip model is AD7887, and be a high speed, low-power consumption, the analog-digital converter of 12, supply voltage is+5V, has the throughput of 125kSPS, and the signal rate of conversion can reach 2.5MHz; And there is list/dual pathways two kinds of mode of operations and powder source management mode flexibly, and change by the control register on chip.In default single channel model, AD7887 also can make read-only ADC.
Described voice announcer 7 adopts the chipspeech of high integration, can realize Chinese, English phonetic synthesis; And be integrated with voice coding, decoding function, support that user carries out recording and playing.User can select earphone or speaker to report.Voice broadcast unit is used for the distance of reminding blind apart from preceding object thing or the hydrops information in section.
Described GSM two's complementer 8 adopts integrated gsm module, has 44 open pin interface, is controlled by serial ports, facilitates user to carry out secondary development.GSM two's complementer 8 be used for blind person face a danger or emergency time, the people that seeks help to setting sends and to seek help note or phone of seeking help.The read signal of gsm module, write signal, chip selection signal are all realized by CPLD logic decoding circuit 9 software decoding.
Above-mentioned voice announcer 7 and GSM two's complementer 8 all adopt serial ports to communicate with DPS chip, because TMS320VC5416 model dsp chip is without serial ports peripheral hardware, therefore, in this utility model, dsp chip adopts two panels 16C550 chip to carry out two groups of serial ports expansion, realize the conversion of dsp chip parallel port to serial ports, make dsp chip can carry out communication with voice announcer 7, GSM two's complementer 8 quickly and efficiently.Wherein, the chip selection signal of 16C550 chip, read signal, write signal, master reset signal are all realized by CPLD logic decoding circuit 9 software decoding.
The operating current of described buzzer is general larger, to such an extent as to the GPIO mouth of TMS320VC5416DSP chip cannot Direct driver, so will utilize amplifying circuit to drive, general use audion carrys out amplified current.The GPIO pin of TMS320VC5416DSP chip connects the b pole of NPN audion through 4.7K Ω, the c pole of audion connects the control pin of buzzer, and the e pole of audion meets GND, and the power pins of buzzer connects 5V voltage.When this utility model apparatus for guiding blind does not select voice real-time broadcasting, buzzer warning can be selected.The report of voice broadcast and buzzer is selected by toggle switch.
Described night, alarm light was connected with+5V power supply by switch, and by on-off control, it is lighted and the state of closing.Night, alarm light was used for reminding vehicles or pedestrians to dodge when blind person goes on a journey night, ensured the safety of blind person's trip further.
The peripheral hardware that described CPLD logic decoding circuit 9 is expansion provides the timing requirements of coupling and crucial control signal, meets the needs of hardware designs.It adopts+3.3V Power supply, and emulation interface is the jtag interface of standard, according to the requirement of hardware designs decoding, the IO being defined as input mainly from the segment data line of dsp chip, part address wire,
(chip selection signal in IO space),
(chip selection signal of data space),
(chip selection signal of the program space),
(I/O gating signal),
(memory strobe signals),
(read-write),
(reset signal),
the signals such as serial clock BCLKX; The IO being defined as outfan mainly FLASH memory 2 chip selection signal, read signal, write signal, reset signal, get out signal; The clock signal of A/D conversion chip; The chip selection signal of gsm module, read signal, write signal; The chip selection signal of extended serial port peripheral hardware, read signal, write signal, master reset signal.
This utility model apparatus for guiding blind also has GSM two's complementer 8 button, the switch of alarm light On/Off, and the button of people's telephone number change of seeking help in GSM two's complementer 8.
Claims (8)
1. an embedded intelligence apparatus for guiding blind, is characterized in that: comprise master controller, FLASH memory, temperature sensor, ultrasonic sensor, A D transducer, level sensor, voice announcer, GSM two's complementer, CPLD logic decoding circuit, buzzer and alarm light; Wherein, master controller adopts dsp chip, the control circuit having JTAG emulation interface and be made up of power circuit, clock circuit, reset circuit; FLASH memory is connected with dsp chip and logic decoding circuit; Dsp chip is also connected with temperature sensor, ultrasonic sensor; Level sensor is connected with dsp chip by A/D converter; Voice announcer and GSM two's complementer all adopt serial ports to communicate with DPS chip; Buzzer is connected with DPS chip by amplifying circuit; Alarm light is connected with power circuit by switch; The IO of logic decoding circuit input from the segment data line of dsp chip, part address wire,
serial clock BCLKX signal; The IO of outfan be FLASH memory chip selection signal, read signal, write signal, reset signal, get out signal; The clock signal of A/D conversion chip; The chip selection signal of gsm module, read signal, write signal; The chip selection signal of extended serial port peripheral hardware, read signal, write signal, master reset signal.
2. a kind of embedded intelligence apparatus for guiding blind as claimed in claim 1, it is characterized in that: described power circuit has ± 12V ,+5V ,+3.3V and+1.6V output voltage, ± 12V and+5V voltage are powered to expanding peripherals respectively, and+3.3V and+1.6V voltage power to respectively the I/O interface of dsp chip and CPU core.
3. a kind of embedded intelligence apparatus for guiding blind as claimed in claim 1, is characterized in that: described clock circuit adopts the active crystal oscillator of 10MHz, and clock circuit crystal oscillator output pin is connected with the clock pins of dsp chip.
4. a kind of embedded intelligence apparatus for guiding blind as claimed in claim 1, is characterized in that: described JTAG emulation interface meets IEEE 1149.1 standard.
5. a kind of embedded intelligence apparatus for guiding blind as claimed in claim 1, is characterized in that: described temperature sensor adopts 1-wire digital temperature sensor, and have the certainty of measurement of 9 ~ 12, temperature measurement range be-55 ~+125 DEG C, employing+5V Power supply.
6. a kind of embedded intelligence apparatus for guiding blind as claimed in claim 1, is characterized in that: described level sensor 6 range ability is 0 ~ 1 meter, sensor diameter Φ 4mm, height 12mm.
7. a kind of embedded intelligence apparatus for guiding blind as claimed in claim 1, it is characterized in that: described A/D conversion chip model is AD7887, be a high speed, low-power consumption, the analog-digital converter of 12, supply voltage is+5V, have the throughput of 125kSPS, the signal rate of conversion can reach 2.5MHz; And there is list/dual pathways two kinds of mode of operations and powder source management mode flexibly.
8. a kind of embedded intelligence apparatus for guiding blind as claimed in claim 1, is characterized in that: also have GSM two's complementer button, the switch of alarm light On/Off, and the button of people's telephone number change of seeking help in GSM two's complementer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585807.1U CN204170056U (en) | 2014-10-10 | 2014-10-10 | A kind of embedded intelligence apparatus for guiding blind |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585807.1U CN204170056U (en) | 2014-10-10 | 2014-10-10 | A kind of embedded intelligence apparatus for guiding blind |
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| CN204170056U true CN204170056U (en) | 2015-02-25 |
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| CN201420585807.1U Expired - Fee Related CN204170056U (en) | 2014-10-10 | 2014-10-10 | A kind of embedded intelligence apparatus for guiding blind |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109998874A (en) * | 2019-04-24 | 2019-07-12 | 广东海洋大学 | A kind of intelligent blind-guiding device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109998874A (en) * | 2019-04-24 | 2019-07-12 | 广东海洋大学 | A kind of intelligent blind-guiding device |
| CN109998874B (en) * | 2019-04-24 | 2024-05-14 | 广东海洋大学 | Intelligent blind guiding device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20191010 |
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| CF01 | Termination of patent right due to non-payment of annual fee |