CN202472880U - Microcomputer voice prompter for eyesight protection - Google Patents
Microcomputer voice prompter for eyesight protection Download PDFInfo
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- CN202472880U CN202472880U CN2012200646918U CN201220064691U CN202472880U CN 202472880 U CN202472880 U CN 202472880U CN 2012200646918 U CN2012200646918 U CN 2012200646918U CN 201220064691 U CN201220064691 U CN 201220064691U CN 202472880 U CN202472880 U CN 202472880U
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Abstract
The utility model relates to a microcomputer voice prompter for eyesight protection. The microcomputer voice prompter adopts a singlechip 3 as a core and comprises an ultrasonic transmitting circuit 4, an ultrasonic reflection and reception circuit 5 and a lighting intensity detection circuit 6. The microcomputer voice prompter is characterized in that the singlechip 3 is connected with the lighting intensity detection circuit 6 through a first I/O (Input/Output) port control pin P1.2 with an A/D (Analog-to-Digital) acquisition function, the lighting intensity detection circuit 6 comprises a photosensitive sensor 16 and a sampling circuit 17, the photosensitive sensor 16 and the sampling circuit 17 form a series circuit, a connecting point between the photosensitive sensor 16 and the sampling circuit 17 is connected with the first I/O port control pin P1.2 of the singlechip 3, and the first I/O port control pin P1.2 serves as the signal input terminal of an A/D converter in the singlechip 3. The microcomputer voice prompter further comprises a button input circuit 7, a voice output control circuit 8, a battery voltage sampling circuit 9 and a power supply and battery charge and discharge management circuit 11. The microcomputer voice prompter for eyesight protection can promptly remind a reader of the sight distance and light during the process of reading.
Description
Technical field
The utility model belongs to electronic technology field, relates to a kind of micro computer sight protectio voice prompting device.Main prompting people are when reading is read the newspaper, and human eye and book should keep suitable distance, light should be adjusted to appropriate brightness, avoid people to cause that because of reading accidentally eye fatigue causes visual deterioration, causes myopia.
Background technology
At present, hypometropia has the phenomenon that becomes younger, and has just be with glasses gently many teenager's ages, traces it to its cause, mainly be (1) many teenagers when reading a book posture not right, the reading on the table of often lying prone makes the qn eye distance books too near; Illuminance is improper when (2) reading a book, and makes the eyes easy fatigue, causes visual deterioration for a long time like this; (3) reading overlong time, excess eye-using etc.
Prior art is primarily aimed at sitting posture and reading/writing distance is pointed out; Thereby can play a role to sight protectio; Like CN01127831.5; Utility model title " multifunctional electronic visual protector " is applicable to the multifunctional electronic visual protector that is carried out sight protectio by the sensing technology measuring distance; CN200520051053.2 and for example; Utility model title " micro computer multifunctional student sight protectio writing case "; When pupil reading and writing fault or eyes and writing case air line distance were less than too closely, the induction alarm device was connected automatically, corrected through light or sound prompting student; Eyes to avoid the student produce fatigue, thereby prevent bathomorphic generation.
But because of light is too strong, illumination reflexes in the eyes with regard to having very strong light to white books, causes eye fatigue, and Here it is often says " light pollution "; Or light is too dark, in order to see writing clearly, will make great efforts to open eyes wide, and time one length also can cause visual fatigue.These are not good owing to illuminance, and cause visual fatigue, are to cause visual deterioration yet, cause near-sighted one of the main reasons.Therefore, be the eyesight of protecting young people, make teenagers healthy growth, intelligentized sight protectio voice prompting device so that can detect and point out the light intensity of school environment in real time, is reminded the reading distance that keeps suitable, will help the eyesight of protecting young people more.
The utility model content
The purpose of the utility model is to provide a kind of micro computer sight protectio voice prompting device that has adopted computer technology, the design of electronic information treatment technology to have ultrasonic ranging, lighting detection, time timing, audio alert control and battery charging and discharging protective device.
The utility model technical scheme:
It adopts single-chip microcomputer 3 is core; Comprise ultrasonic transmit circuit 4, ultrasonic reflections receiving circuit 5 and illuminance testing circuit 6; Single-chip microcomputer 3 is connected with illuminance testing circuit 6 by the I/O mouth control pin P1.2 with A/D acquisition function; Illuminance testing circuit 6 comprises light sensor 16 and sample circuit 17; Light sensor 16 constitutes series circuits with sample circuit 17, is linked into an I/O mouth control pin P1.2 of single-chip microcomputer 3 from the tie point between light sensor 16 and the sample circuit 17, and an I/O mouth control pin P1.2 makes the signal input part of single-chip microcomputer 3 interior A/D converters.
Described micro computer sight protectio voice prompting device also comprises button inputting circuits 7, voice output control circuit 8 and battery voltage sampling circuit 9.
The chip internal of described single-chip microcomputer 3 carries A/D converter, and sheet includes program storage, data-carrier store and at least 11 I/O mouth control pins, wherein has at least 2 I/O mouth control pins that the A/D acquisition function is arranged, and the built-in chip type of described single-chip microcomputer 3 has crystal oscillator.Adopt the interior crystal oscillator of sheet to do system clock.
Described light sensor 16 is the LXD/GB5-A1DPH light sensor, and the sample resistance in the sample circuit 17 is got 2K resistance.
The illuminance detection method is: light sensor 16 is with after sample circuit 17 is connected, and experiences the power of light by light sensor 16, and the voltage signal on the sampling resistor is changed; The I/O mouth control pin P1.2 that this voltage that changed by light is delivered to single-chip microcomputer 3 carries out A/D and converts digital quantity to; Accomplish software scale transformation algorithm computation through single-chip microcomputer 3 program designs and go out current illuminance value, last and standard value compares judges that controlling audio alert points out; I/O mouth control pin P1.2 through single-chip microcomputer 3 constantly detects the lighting degree in real time, realizes the Realtime Alerts prompting when illuminance is not enough.
Described single-chip microcomputer 3 is through the 2nd I/O mouth control pin P1.0 output ultrasonic signal ripple; And be connected with the input end of ultrasonic transmit circuit 4; Ultrasonic transmit circuit 4 comprises driving circuit 12 and ultrasonic emitting sensor 13; Ultrasonic signal is delivered to ultrasonic emitting sensor 13 after discharging through driving circuit 12, by ultrasonic emitting sensor 13 emission ultrasonic signals.
The 3rd I/O mouth control pin P3.3 of described single-chip microcomputer 3 is connected as the output terminal of external interrupt signal input end with ultrasonic reflections receiving circuit 5; Ultrasonic reflections receiving circuit 5 comprises ultrasonic receiving sensor 14 and ultrasonic reflections demodulator circuit 15; Ultrasonic reflections demodulator circuit 15 carries out that signal discharge is big, do external interrupt signal behind the amplitude limit, bandpass filtering, detection, integration, shaping, flows to the 3rd I/O mouth control pin P3.3 of single-chip microcomputer 3.
The 4th I/O mouth control pin P1.1 with A/D acquisition function of described single-chip microcomputer 3 makes A/D sampled signal input end and is connected with battery voltage sampling circuit 9, and battery voltage sampling circuit 9 is connected with lithium battery 22; After lithium battery 22 work discharged into certain magnitude of voltage, the battery voltage value that battery voltage sampling circuit 9 is gathered this moment was sent into single-chip microcomputer 3 and is calculated comparison process, as the built-in battery discharge threshold values V of the magnitude of voltage that collects less than single-chip microcomputer 3
tThe time, single-chip microcomputer 3 is connected with under-voltage pilot lamp 10 through the 5th I/O mouth control pin P3.7, and under-voltage pilot lamp 10 bright sudden strain of a muscle cautions get into the power down protection state automatically after 1 minute.
The the 6th, the 7th of described single-chip microcomputer 3 is connected with 3 button K1, K2, K3 respectively with the 8th I/O mouth control pin P3.0, P3.1, P3.4, and 3 button K1, K2, K3 are connected with button inputting circuits 7, wherein:
First button K1 is the alarm keys that resets, promptly press the K1 key after timing and alarming count from zero, when counting down to when equating, send alarm and " take a good rest " with the preset time value; If the time is not pressed the K1 key after having reported to the police, timing meeting alarm once " was taken a good rest " in then per 5 minutes;
Second button K2 is that timing time is provided with key, and timing time has 5 kinds of selections, is that ring-type handles button: press the K2 key the 1st time, timing time is predisposed to 30 minutes; Press the K2 key the 2nd time, timing time is predisposed to 45 minutes, presses the K2 key the 3rd time, and timing time is predisposed to 60 minutes; The 4th is pressed the K2 key, and timing time is predisposed to 90 minutes, and the 5th is pressed the K2 key; Timing time is predisposed to 120 minutes, presses the K2 key the 6th time, and timing time is got back to again and is predisposed to 30 minutes; And the like, handle keypress function circlewise;
The 3rd button K3 is that supersonic sounding is provided with key, is provided with 5 kinds of supersonic soundings selection is set, and is that ring-type handles button: press the K3 key the 1st time, supersonic sounding is predisposed to 20cm; Press the K3 key the 2nd time, supersonic sounding is predisposed to 25cm, presses the K3 key the 3rd time, and supersonic sounding is predisposed to 30cm; The 4th is pressed the K3 key, and supersonic sounding is predisposed to 35cm, and the 5th is pressed the K3 key; Supersonic sounding is predisposed to 40cm, presses the K3 key the 6th time, and supersonic sounding is got back to again and preset 20cm.And the like, handle keypress function circlewise.
The the 9th, the tenth and the 11 I/O mouth control pin P1.5 of described single-chip microcomputer 3, P1.6, P1.7 are as voice output control signal end; Be connected with three input port A0, A1, A2 of voice output control circuit 8, voice output control circuit 8 comprises voice memory circuit and control circuit 18 and loudspeaker 19.
Described micro computer sight protectio voice prompting device also comprises power supply and battery charging and discharging management circuit 11; Power supply and battery charging and discharging management circuit 11 comprise resistance-capacitance depressurization rectification circuit 20, charging indicator light 28, battery charging management chip 21, lithium battery 22, sample circuit 23, operating switch 24, electronic switch 25, regulator block 26 and ripple treatment circuit 27;
When system's operate as normal was supplied power, lithium battery 22 was supplied power; The lithium battery 22 anodal operating switches 24 that connect, operating switch 24 inside are mechanical contacts, pull the B end when switch, system cut-off quits work; Pulling A end system energized when switch starts working; The drain electrode of electronic switch 25 is connected with the A end of operating switch 24, and the source electrode of electronic switch 25 is linked into the input end Vi of regulator block 26, and the tube grid of electronic switch 25 is connected with sample circuit 23; Regulator block 26 carries out the voltage of input to hold output+5V from Vo behind the lowering and stabilizing blood pressure, for sight protectio prompting device 1 provides WV; Use an electric capacity to do ripple and handle, be parallel-connected to the Vo output terminal through ripple treatment circuit 27;
The charging of lithium battery 22 is adopted 220V to exchange resistance-capacitance depressurization rectification circuit 20 and is realized; Resistance-capacitance depressurization rectification circuit 20 uses a resistance and electric capacity parallel connections earlier, and with after a resistance connect, the other end of resistance in series is connected with the power lead and the plug 2 of sight protectio prompting device 1, on the plug 2 connection 220V alternating voltages again; Be linked into a rectifier bridge of forming by 4 diodes behind the resistance-capacitance depressurization; The parallel connection of rectifier bridge output terminal inserts a filter regulator circuit that is made up of electric capacity and the 12V stabilivolt of 1000uF, is pressed into 12V voltage stabilizing output to the 220V AC voltage drop of input;
The output terminal of resistance-capacitance depressurization rectification circuit 20 is connected to charging indicator light 28 and sample circuit 23 input ends; Sample circuit 23 is linked into electronic switch 25 after through 2 electric resistance partial pressures; The output terminal of charging indicator light 28 is linked into the input end of operating switch 24 and lithium battery 22; The VDD, the VSS end that connect battery charging management chip 21 simultaneously through resistance R 1, C1 respectively; The Cout end of battery charging management chip 21 connects the grid of Q1; The Dout end connects the grid of Q2, and the drain electrode of Q1, Q2 links together, and the source electrode of Q1, Q2 connects the negative pole of filtering voltage regulation output and the negative pole of lithium battery 22 respectively;
When the power lead of sight protectio prompting device 1 and plug 2 inserted the alternating current 220V supply sockets, moment broke off through sample circuit 23 control electronic switches 25, makes lithium battery 22 stop discharge output, at this moment be that lithium battery 22 charges; Lithium battery 22 Charge Managements are responsible for by battery charging management chip 21, and when charging normal, charging indicator light 28 is bright; If after battery was full of electricity, charging indicator light 28 went out.
The utility model is simple to operate, and applicability is strong, on circuit design and programming technique, has realized modular design, " foolization " operation, and the reader can in time remind in the system that makes in the reading reading process, bring a lot of convenience to the reader.
The utility model has been realized following function:
1, ultrasound wave is accurately found range, and distance accuracy reaches ± 1cm.
2, critical lamps illumination lightness detects, and critical illumination is 400lx.
3, the alarm of " keeping at a distance ": when detecting the reading distance, show that human eye is too near apart from books, then control output audio alert prompting " keeping at a distance " less than certain setpoint distance (being defaulted as 30cm).
4, " light is too dark " alarm: according to classroom lighting and illumination health national standard (GB7793-87), the average illuminance on the desk face is not less than 400lx (lux).Therefore, when detecting the lighting degree, show that illuminance is too little, then control output audio alert prompting " light is too dark " less than 400lx.
5, the alarm of " taking a good rest ": indoor design has clock counter; From reading beginning timing start-up time; If the reading time, then control output voice suggestion " was taken a good rest " when surpassing certain setting-up time (being defaulted as 45 minutes), so that remind the reader to have a rest for a moment; Make mental relaxation, improve learning efficiency.After this voice suggestion in per 5 minutes once " is taken a good rest ", after pressing the K1 key, just carries out timing and alarming according to presetting timing time again.
6, can set timing time: through the K2 key 5 grades of timing and warning can be set, timing time has 5 kinds of selections, presses the K2 key the 1st time, and timing time is predisposed to 30 minutes; Press the K2 key the 2nd time, timing time is predisposed to 45 minutes, presses the K2 key the 3rd time, and timing time is predisposed to 60 minutes; The 4th is pressed the K2 key, and timing time is predisposed to 90 minutes, and the 5th is pressed the K2 key; Timing time is predisposed to 120 minutes, presses the K2 key the 6th time, and timing time is predisposed to 30 minutes again.
7, can set supersonic sounding reports to the police: through the K3 key 5 grades of supersonic soundings and warning can be set, press the K3 key the 1st time, supersonic sounding is predisposed to 20cm, presses the K3 key the 2nd time; Supersonic sounding is predisposed to 25cm, presses the K3 key the 3rd time, and supersonic sounding is predisposed to 30cm; The 4th is pressed the K3 key, and supersonic sounding is predisposed to 35cm, and the 5th is pressed the K3 key; Supersonic sounding is predisposed to 40cm, presses the K3 key the 6th time, and supersonic sounding is predisposed to 20cm.
8, power supply and battery charging and discharging management circuit: the 220V ac buck charges the battery, and is battery-powered, has battery electric quantity and detects and defencive function, to prolong the serviceable life of battery.
The utility model is specially adapted to children and when reading study, in time points out the reading posture not right; Whether prompting light is not enough or the too near problem of qn eye distance desk face books; Also can detect and remind the lamplight brightness of school environments such as classroom whether suitable in real time, can protect children's eyesight effectively.
1, the utility model can be realized the warning reminding of reading a book reading time well; Can be to the too weak alarm of reading ambient light; Too closely can in time warn the reading distance; Can prevent the long-time fatigue that excessively causes, the protection eye eyesight is had good applicability with eye, for the reader particularly children reader bring glad tidings.
2, electronic technology, control technology and computer technology on implementation method, have been adopted; Orderly work through the Single-chip Controlling total system; Control ultrasonic ranging, light luminance detect, the voice storage is exported and the battery charging and discharging protection, make system stability, reliable work.
3, on circuit design and programming technique, carried out modular design, " foolization " operation, simple to operation, be prone to learn well usefulness, guarantee the security and the reliability of system.
Description of drawings
The one-piece construction synoptic diagram of Fig. 1, the utility model embodiment 1.
The automatic Detection & Controling partial circuit of the single-chip microcomputer of Fig. 2, the utility model embodiment 1 connects synoptic diagram.
The ultrasonic transmit circuit structural representation of Fig. 3, the utility model embodiment 1.
The ultrasonic reflections receiving circuit structural representation of Fig. 4, the utility model embodiment 1.
The illuminance testing circuit structural representation of Fig. 5, the utility model embodiment 1.
The voice output control circuit structural representation of Fig. 6, the utility model embodiment 1.
The power supply of Fig. 7, the utility model embodiment 1 and battery feed circuit structural representation.
Embodiment
Embodiment 1: it comprises the automatic Detection & Controling circuit of sight protectio micro computer voice prompting device; (U1) realizes by single-chip microcomputer 3; As shown in Figure 2: single-chip microcomputer 3 is the core of The whole control system as microcontroller; The whole control system inside comprises single-chip microcomputer 3, ultrasonic transmit circuit 4, ultrasonic reflections receiving circuit 5, illuminance testing circuit 6; Button inputting circuits 7, circuit parts such as voice output control circuit 8, battery voltage sampling circuit 9, under-voltage pilot lamp 10 and power supply and battery charging and discharging management circuit 11 constitute.
In the present embodiment; Single-chip microcomputer (U1) employing STC macrocrystalline company produces, packing forms is the STC12C5402AD chip of SOP16; This singlechip chip inside carries A/D converter; Sheet includes 2KB program storage, 256 byte data RAM, 11 I/O mouth control pins (wherein 6 I/O mouth lines have the A/D acquisition function), uses 12MHz crystal oscillator in the sheet.Single-chip microcomputer is through all chip and circuit around 9 I/O mouth management controls.Wherein the P1.0 of single-chip microcomputer (U1) makes delivery outlet usefulness, is connected with ultrasonic transmit circuit 4, as output emission ultrasonic signal.Ultrasonic transmit circuit 4 is made up of driving circuit 12 and ultrasound emission sensor 13.Driving circuit 12 has used a middle power Darlington transistor or two compound transistors to amplify the ultrasonic signal that drives 40KHz, drives outwards emission ultrasonic signal of ultrasound emission sensor 13.Ultrasound emission sensor 13 has used the T40-16 sensor element, and it can accept the AC signal that frequency of operation is 40KHz, produces the resonance ultrasonic emitting and realizes long-distance communications to the space.Ultrasound wave has good directionality, can become ray and characteristics such as direction propagation.
The P3.3 of single-chip microcomputer 3 makes external interrupt input port usefulness, is connected with ultrasonic reflections receiving circuit 5, as the external interrupt trigger pip.Ultrasonic reflections receiving circuit 5 has used ultrasound wave receiving sensor 14 and ultrasonic reflections demodulator circuit 15.Ultrasound wave receiving sensor 14 adopts the R40-16 sensor element, and its inner ceramic vibrator transducer can produce mechanical oscillation signal after receiving ultrasound wave, and its amplification is transformed into electric flux output, realizes the ultrasound wave that sends is detected.The signal of R40-16 sensor output directly is sent to ultrasonic reflections demodulator circuit 15.Ultrasonic reflections demodulator circuit 15 has used the CX20106A special IC, and its ability receive frequency range can be provided with the centre frequency of reception at 30～60KHz waveform through the resistance of regulating the 5th pin.When using the resistance of 200k, the centre frequency of reception is 40KHz.Then to the R40-16 sensor pass come signal amplify (total gain amplifier reaches 80db), Filtering Processing, send into the P3.3 pin of single-chip microcomputer at last as external interrupt signal.
The P1.2 of single-chip microcomputer 3 is as the signal input part of A/D converter in the sheet, and the series circuit that constitutes with light sensor 16, sample circuit 17 is connected.Light sensor LXD/GB5-A1DPH, sample circuit are 2K resistance, and light sensor 16 is with after sample circuit 17 is connected, and experience the power of light by light sensor 16, and the voltage signal on the sampling resistor is changed.This voltage that changed by light is delivered to P1.2 and is carried out A/D and convert digital quantity to, goes out current illuminance value through software scale transformation algorithm computation, and last comparing with standard value judges that controlling audio alert points out.Constantly detect the lighting degree in real time through P1.2, realize the Realtime Alerts prompting when illuminance is not enough.
The P1.1 of single-chip microcomputer 3 is as the signal input part of A/D converter in the sheet, and whether detect cell voltage in real time under-voltage.P1.1 directly is connected with battery voltage sampling circuit 9.The battery voltage sampling circuit is connected by 2 resistance, and with lithium battery 22 parallelly connected formations, P1.1 is directly connected to the centre of two resistance again.When the battery normal power supply, battery voltage value can reduce gradually, and two ohmically pressure drops are also changed.The pressure drop of this variation is sent to P1.1 to be carried out A/D and converts digital quantity to, goes out current lithium battery voltage value through the software mapping algorithm computation, and whether last and ultimate value compare judgement and control and answer alarm to quit work.The magnitude of voltage of the lithium battery that collects as A/D is less than its discharge threshold values V
tThe time, pilot lamp 10 bright sudden strain of a muscle cautions that single-chip microcomputer 3 controls are under-voltage, under-voltage pilot lamp 10 bright sudden strain of a muscle cautions get into the power down protection state automatically after 1 minute.P3.7 in the single-chip microcomputer 3 is connected with under-voltage pilot lamp 10, and under-voltage pilot lamp 10 uses a light emitting diode.
Single-chip microcomputer 3 is done K1, K2, K3 button respectively through P3.0, P3.1, three I/O mouths of P3.4, forms button input 7, as button input switch signal.The Key element of a mechanical contact is used in button input 7, when the K1 button is pressed, gives P3.0 input low level (effectively button); Not being pressed is, P3.0 is a high level; , gives the K2 button P3.1 input low level (effectively button) when being pressed; Not being pressed is, P3.1 is a high level; , gives the K3 button P3.4 input low level (effectively button) when being pressed; Not being pressed is, P3.4 is high level (an invalid button).The warning that is used to reset of K1 key, the K2 key is used to be provided with timing time, and the K3 key is used to be provided with supersonic sounding and reports to the police.
Single-chip microcomputer 3 is made the voice output control signal through P1.5, P1.6, three I/O mouths of P1.7, is connected with voice output control circuit 8.Voice output control circuit 8 is made up of with control circuit 18 (U3) and loudspeaker 19 the voice storage.The voice storage has been used the TRS3BM10A speech chip with control circuit 18 (U3); In TRS3BM10A speech chip internal storage 3 sections voice; Promptly be " keeping at a distance ", " light is too dark " and " taking a good rest ", sounding of speech chip receives the control of single-chip microcomputer 3.Loudspeaker 19 adopt 8 loudspeaker device.The voice storage is connected with three I/O mouths of P1.5 ~ P1.7 respectively with three pin of A0, A1, A2 of control circuit 18 (U3), and the voice storage directly is connected with loudspeaker 19 with two pin of P, N of control circuit 18 (U3).When P1.5 output high level, loudspeaker send the sound of " keeping at a distance ", and when P1.6 output high level, loudspeaker send the sound of " light is too dark ", and when P1.7 output high level, loudspeaker send the sound of " taking a good rest ".
Total system employing+5V powered operation.It is more succinct, practical that power supply and battery charging and discharging management 11 design.Actual when operate as normal, system adopts lithium battery power supply.Lithium battery 22 has used the 9V lithium battery that a joint is chargeable, discharge.Lithium battery output 9V carries out lowering and stabilizing blood pressure output+5V through regulator block 26.Regulator block 26 (U5) has used the LM2940 voltage stabilizing chip of low pressure differential.The cathode voltage of lithium battery 22 is sent to the Vi input end of LM2940 voltage stabilizing chip (U5) again through operating switch 24 and electronic switch 25, makes work voltage through offering system from Vo end output+5V voltage behind the LM2940 lowering and stabilizing blood pressure.Operating switch 24 has used the toggle switch of 2 shelves, the output of cutting off the electricity supply when pushing the B end, energized power supply when pushing the A end.Electronic switch 25 has used the MOFET pipe of model as SE2302; The grid of SE2302 receives the control of sample circuit 23; Sample circuit 23 has used a resistance and one 9013 triode, and an end of resistance is connected with the A of operating switch 24, and the other end of resistance directly is connected with the collector of triode.When the collector of triode is output as low level, SE2302 is ended; When the collector of triode is output as high level, make the SE2302 conducting.Transistor emitter ground connection, the base stage of triode is connected with capacitance-resistance filter rectification 20 output terminals through resistance.Capacitance-resistance filter rectification 20 has used resistance and the series connection of electric capacity of the dacron to carry out resistance-capacitance depressurization, and then adopts 4 IN4001 diodes to carry out rectification, adopts electrochemical capacitor to carry out filtering at last and carries out voltage stabilizing with the 12V voltage stabilizing diode and export the 12V DC voltage.When the power lead of sight protectio prompting device 1 and plug 2 inserted the alternating current 220V supply sockets, moment broke off through sample circuit 23 control electronic switches 25, cuts off the voltage output of lithium battery 22, at this moment promptly can be lithium battery 22 chargings.Lithium battery 22 Charge Managements are responsible for by battery charging management chip 21 (U4), and when charging normal, charging indicator light 28 is bright; If after battery was full of electricity, charging indicator light 28 went out.After charging finishes, the power lead and the plug 2 of sight protectio prompting device 1 are extracted, push the A end to operating switch 24, can start work.
Battery charging management chip 21 (U4) has used rechargeable battery protection chip R5402N, by shown in Figure 7, and pin of chip C
Out, D
OutConnected a MOFET pipe SE2302 (Q1, Q2) respectively.When giving lithium cell charging, R5402N chip detection V
DDVoltage on the pin.Work as V
DDUprise and when having surpassed the threshold voltage of charge detector, the expression chip detection is to overcharging C at this moment by low
OutThe pin output low level, external control N raceway groove MOFET pipe Q1 is turned off.When lithium battery discharges, R5402N chip detection V
DDVoltage on the pin.Work as V
DDBy high step-down and less than during the threshold voltage of discharge detector, the expression chip detection is to overdischarge this moment, D
OutThe pin output low level, external control N raceway groove MOFET pipe Q2 is turned off.
In addition, system has also designed single-chip microcomputer inside a digital electronic clock timer, carries out the timing of time and relatively judges.When energized, start-up system is started working, the work that also picks up counting of single-chip microcomputer timer internal/counter.When timing reached prevalue (as 45 minutes), Single-chip Controlling I/O mouth P1.7 exported high level, makes loudspeaker 19 send the sound of " taking a good rest ", reminded the reader to have a rest for a moment, made mental relaxation, so that improve learning efficiency.
This mode of sampling can realize very high security; Promptly carry out low-voltage power supply by battery fully in use, if after the power lead of sight protectio prompting device 1 and plug 2 inserted civil power, equipment cut off the internal electric source power supply immediately; System is quit work; Do not supply power when accomplishing to charge, do not connect civil power and charging during power supply, make the child children safe and reliable when the equipment of use.
1, the method for attachment of present embodiment each several part is following:
The utility model is with single-chip microcomputer 3 (U1), ultrasonic transmit circuit 4; Ultrasonic reflections receiving circuit 5; Illuminance testing circuit 6, button inputting circuits 7, voice output control circuit 8, battery voltage sampling 9, under-voltage indication 10, power supply and battery charging and discharging management circuit 11 design, are installed on the PCB circuit board; Use the shell encapsulation to form micro computer sight protectio voice prompting device 1 main frame, shell is drawn 220V electric main power lead and plug 2.The plug of power lead and plug 2 is inserted supply socket, just can start working.
2, each operation steps of present embodiment is following:
The plug of power lead and plug 2 is inserted the electric main supply socket, and equipment just can be started working.
(1) supersonic sounding setting.Through the K2 key 5 grades of supersonic soundings and warning can be set, minimum range finding is reported to the police and is 20cm, and promptly supersonic sounding 20cm just sends warning and " keeps at a distance ".If press the K2 key once, range finding is reported to the police and is 25cm; Press K2 key next time again, range finding is reported to the police and is made as 25cm; Press K2 key next time again, range finding is reported to the police and is made as 30cm; Press K2 key next time again, range finding is reported to the police and is made as 35cm; Press K2 key next time again, range finding is reported to the police and is made as 40cm; Press K2 key next time again, range finding is reported to the police to establish again and is got back to 20cm.
(2) timing time is set.Through the K3 key 5 grades of timing and warning can be set, minimum timing and alarming is 30 minutes, i.e. timing to 30 minute is just sent warning and " taken a good rest ".If press the K3 key once, timing and alarming is 45 minutes; Press K3 key next time again, timing and alarming was made as 60 minutes; Press K3 key next time again, timing and alarming was made as 60 minutes; Press K3 key next time again, timing and alarming was made as 90 minutes; Press K3 key next time again, timing and alarming was made as 120 minutes; Press K3 key next time again, timing and alarming is established again and is got back to 30 minutes.
(3) show that when L1 flashes to detect battery under-voltage, battery needs charging.
(4) when detecting illuminance and be lower than 500lx, send voice suggestion " insufficient light ".
(5) when detecting the reading distance, send voice suggestion and " keep at a distance " less than setting value.
(6) when the detection gate time reaches predetermined value, send voice suggestion and " take a good rest ".
Claims (10)
1. micro computer sight protectio voice prompting device; It adopts single-chip microcomputer (3) is core; Comprise ultrasonic transmit circuit (4), ultrasonic reflections receiving circuit (5) and illuminance testing circuit (6); It is characterized in that: single-chip microcomputer (3) is connected with illuminance testing circuit (6) by the I/O mouth control pin (P1.2) with A/D acquisition function; Illuminance testing circuit (6) comprises light sensor (16) and sample circuit (17); Light sensor (16) and sample circuit (17) constitute series circuit, are linked into an I/O mouth control pin (P1.2) of single-chip microcomputer (3) from the tie point between light sensor (16) and the sample circuit (17), and an I/O mouth control pin (P1.2) is made the signal input part of the interior A/D converter of single-chip microcomputer (3).
2. micro computer sight protectio voice prompting device according to claim 1 is characterized in that: also comprise button inputting circuits (7), voice output control circuit (8) and battery voltage sampling circuit (9).
3. micro computer sight protectio voice prompting device according to claim 1 and 2; It is characterized in that: the chip internal of described single-chip microcomputer (3) carries A/D converter; Sheet includes program storage, data-carrier store and at least 11 I/O mouth control pins; Wherein have at least 2 I/O mouth control pins that the A/D acquisition function is arranged, the built-in chip type of described single-chip microcomputer (3) has crystal oscillator.
4. micro computer sight protectio voice prompting device according to claim 3 is characterized in that: described light sensor (16) is the LXD/GB5-A1DPH light sensor, and the sample resistance in the sample circuit (17) is got 2K resistance.
5. micro computer sight protectio voice prompting device according to claim 1 and 2; It is characterized in that: described single-chip microcomputer (3) is through the 2nd I/O mouth control pin (P1.0) output ultrasonic signal ripple; And be connected with the input end of ultrasonic transmit circuit (4); Ultrasonic transmit circuit (4) comprises driving circuit (12) and ultrasonic emitting sensor (13); Ultrasonic signal is delivered to ultrasonic emitting sensor (13) after discharging through driving circuit (12), by ultrasonic emitting sensor (13) emission ultrasonic signal.
6. micro computer sight protectio voice prompting device according to claim 1 and 2 is characterized in that: the 3rd I/O mouth control pin (P3.3) of described single-chip microcomputer (3) is connected as the output terminal of external interrupt signal input end with ultrasonic reflections receiving circuit (5); Ultrasonic reflections receiving circuit (5) comprises ultrasonic receiving sensor (14) and ultrasonic reflections demodulator circuit (15); Ultrasonic reflections demodulator circuit (15) carries out that signal discharge is big, do external interrupt signal behind the amplitude limit, bandpass filtering, detection, integration, shaping, flows to the 3rd I/O mouth control pin (P3.3) of single-chip microcomputer (3).
7. micro computer sight protectio voice prompting device according to claim 1 and 2; It is characterized in that: the 4th I/O mouth control pin (P1.1) with A/D acquisition function of described single-chip microcomputer (3) is made A/D sampled signal input end and is connected with battery voltage sampling circuit (9), and battery voltage sampling circuit (9) is connected with lithium battery (22); After lithium battery (22) work discharges into certain magnitude of voltage; Battery voltage sampling circuit (9) collection battery voltage value is at this moment sent into single-chip microcomputer (3) and is calculated comparison process, as the built-in battery discharge threshold values V of the magnitude of voltage that collects less than single-chip microcomputer (3)
tThe time, single-chip microcomputer (3) is connected with under-voltage pilot lamp (10) through the 5th I/O mouth control pin (P3.7), and the bright sudden strain of a muscle caution of under-voltage pilot lamp (10) gets into the power down protection state automatically after 1 minute.
8. micro computer sight protectio voice prompting device according to claim 1 and 2; It is characterized in that: the 6th, the 7th of single-chip microcomputer (3) is connected with 3 buttons (K1, K2, K3) respectively with the 8th I/O mouth control pin (P3.0, P3.1, P3.4); 3 buttons (K1, K2, K3) are connected with button inputting circuits (7), wherein:
First button (K1) is the alarm keys that resets, and promptly presses first button (K1) back timing and alarming and counts from zero, and when counting down to when equating with the preset time value, sends alarm and " takes a good rest "; If the time is not pressed first button (K1) after having reported to the police, timing meeting alarm once " was taken a good rest " in then per 5 minutes;
Second button (K2) is that timing time is provided with key, and timing time has 5 kinds of selections, is that ring-type handles button: press second button (K2) the 1st time; Timing time is predisposed to 30 minutes, presses second button (K2) the 2nd time, and timing time is predisposed to 45 minutes; Press second button (K2) the 3rd time, timing time is predisposed to 60 minutes, and the 4th is pressed second button (K2); Timing time is predisposed to 90 minutes, and the 5th is pressed second button (K2), and timing time is predisposed to 120 minutes; Press second button (K2) the 6th time, timing time is got back to again and is predisposed to 30 minutes;
The 3rd button (K3) is that supersonic sounding is provided with key, is provided with 5 kinds of supersonic soundings selection is set, and is that ring-type handles button: press the 3rd button (K3) the 1st time; Supersonic sounding is predisposed to 20cm, presses the 3rd button (K3) the 2nd time, and supersonic sounding is predisposed to 25cm; Press the 3rd button (K3) the 3rd time, supersonic sounding is predisposed to 30cm, and the 4th is pressed the 3rd button (K3); Supersonic sounding is predisposed to 35cm, and the 5th is pressed the 3rd button (K3), and supersonic sounding is predisposed to 40cm; Press the 3rd button (K3) the 6th time, supersonic sounding is got back to again and is preset 20cm.
9. micro computer sight protectio voice prompting device according to claim 1 and 2; It is characterized in that: the 9th, the tenth and the 11 I/O mouth control pin (P1.5, P1.6, P1.7) of single-chip microcomputer (3) is as voice output control signal end; Be connected with three input ports (A0, A1, A2) of voice output control circuit 8, voice output control circuit (8) comprises voice memory circuit and control circuit (18) and loudspeaker (19).
10. micro computer sight protectio voice prompting device according to claim 1 and 2 is characterized in that: also comprise power supply and battery charging and discharging management circuit (11); Power supply and battery charging and discharging management circuit (11) comprise resistance-capacitance depressurization rectification circuit (20), charging indicator light (28), battery charging management chip (21), lithium battery (22), sample circuit (23), operating switch (24), electronic switch (25), regulator block (26) and ripple treatment circuit (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200646918U CN202472880U (en) | 2012-02-27 | 2012-02-27 | Microcomputer voice prompter for eyesight protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200646918U CN202472880U (en) | 2012-02-27 | 2012-02-27 | Microcomputer voice prompter for eyesight protection |
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| Publication Number | Publication Date |
|---|---|
| CN202472880U true CN202472880U (en) | 2012-10-03 |
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| CN2012200646918U Expired - Fee Related CN202472880U (en) | 2012-02-27 | 2012-02-27 | Microcomputer voice prompter for eyesight protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592403A (en) * | 2012-02-27 | 2012-07-18 | 东华理工大学 | Microcomputer eyesight protecting voice prompter |
| CN107622645A (en) * | 2016-07-13 | 2018-01-23 | 张力 | A kind of intelligent eyeshield equipment |
-
2012
- 2012-02-27 CN CN2012200646918U patent/CN202472880U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592403A (en) * | 2012-02-27 | 2012-07-18 | 东华理工大学 | Microcomputer eyesight protecting voice prompter |
| CN107622645A (en) * | 2016-07-13 | 2018-01-23 | 张力 | A kind of intelligent eyeshield equipment |
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Granted publication date: 20121003 Termination date: 20130227 |