CN2502338Y

CN2502338Y - Multifunctional electronic vision protector

Info

Publication number: CN2502338Y
Application number: CN 01255568
Authority: CN
Inventors: 冯华飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-09-06
Filing date: 2001-09-06
Publication date: 2002-07-24
Anticipated expiration: 2011-09-06

Abstract

The utility model relates to a multifunctional electronic vision protector, consisting of a sending circuit, a receiving circuit, a signal amplifying circuit and an alarming circuit. The technical proposal of the utility model is that above two position-detecting sending circuits are inputted into the receiving circuit; the receiving circuit transmits the signal into s with different frequency after shaping and amplifying the signal; and the frequency discriminator outputs the signal to the net step relaying and comparing circuit to trigger and integrate into voice chip. Compared with the prior art, the utility model has the advantages of multi-point detecting and high sensitivity. The utility model is not only used for protecting vision when read, but also used for protecting vision when use computer, play game and watch TV.

Description

The multifunction electronic vision protector

Technical field

The utility model has related to a kind of vision protection device structure, is specially adapted to be undertaken by the sensing technology measuring distance multifunction electronic vision protector of sight protectio.

Background technology

In the prior art, for the students in middle and primary schools' that protect growth and development stage eyesight, and in their busy study, the unlikely normal development of skeleton that has influenced them because of not rectifying of learning posture.The writing desk that has occurred several protection student eyesights successively; this series products mainly relies on metal or yoke; the eyes of forcing the student when study and desktop maintain a certain distance; has plenty of the chin that supports the student by yoke; have plenty of the head that is keeping off the learner with the metal cross bar, all give the sensation of a kind of discomfort of student, in the course of time; can make the student detest writing desk, thereby influence is to the interest of study.

Summary of the invention

It is a kind of when ensureing the comfortable academic environment of student that the purpose of this utility model and task are to provide; the eyesight of protecting young people; pre-myopia prevention, stravismus, amblyopia; cultivate healthy study sitting posture, simultaneously can nearly step exploitation be used for that the teenager uses computer, the vision protection device when seeing TV of playing games.By the scientific and technological content of product, bring out the interest of teenager to science.

The purpose of this utility model is achieved by the following technical solution: multifunction electronic vision protector of the present utility model; form by radiating circuit, receiving circuit, signal amplification circuit, warning circuit etc.; two groups of above position probing radiating circuits input to receiving circuit; receiving circuit amplifies signal shaping imports the frequency discriminator of different frequency separately; frequency discriminator outputs signal to next stage time-delay comparator circuit, and triggers the integrated speech chip.

The purpose of this utility model can also adopt three groups of infrared emission, receiving sensor at described position probing radiating circuit, receiving circuit, the frequency discriminator that three groups of different frequencies of input are amplified in the received signal shaping carries out frequency discrimination, by next stage time-delay comparator circuit input nand gate, and trigger the integrated speech chip.

Sensor described in the utility model adopts infrared diode, audio phase locking ring IC ₂The tunable vibration of autotracking of output is through IC ₁Three Sheffer stroke gate shapings after the control triode to drive infrared transmitting tube emission infrared pulse, after the infrared ray of reflected back is received by infrared receiving tube, through IC ₁Other three Sheffer stroke gate shapings, amplify, enter IC ₂Carry out frequency discrimination, as the frequency and the IC of this received signal ₂When inner VCO frequency is consistent, IC ₂To produce a low level and trigger next stage time-delay comparator circuit.Described audio phase locking ring IC ₂Adopt integrated circuit 567, its 6 pin connects an adjustable resistance; The transistor collector of controlling after three Sheffer stroke gate shapings connects an adjustable resistance.

Time-delay comparator circuit of the present utility model adds resistance, capacitor element formation delay circuit, C with two phase inverters of CD40106 ₂The signal that comes out is behind first phase inverter, and one the tunnel directly sends into scrambler CD4532, and another road enters two four input nand gate CD4012 through second phase inverter after time-delay.Described time-delay comparator circuit takes out six tunnel trigger pips, wherein three the tunnel behind first order phase inverter, directly send into scrambler CD4532, enter the address of integrated speech IC with generation, three tunnel signals that compare through delaying time are through second phase inverter in addition, enter two four input nand gate CD4012, send into the PE port of voice IC with the trigger pip that produces integrated speech IC.The B of speech IC ₀, B ₁Address port is divided into four sections with its speech recording and reproducing segment addressing, triggers the recording playback sound by the address; Each road sensing head will have a signal of not delaying time to send into the address port B of voice IC earlier through the CD4532 addressing ₀, B ₁, and have only when another road through time-delay, the filtering short message when trigger pip of sending via CD4012 arrives the PE port of voice IC, could trigger the appropriate address section voice of speech chip, these voice will be by the output port P of voice IC ₀Drive sound horn through amplifying.

Light sensing probe system in the utility model constitutes an on-off circuit by a photoresistance and a triode, its switching signal also will enter the time-delay comparator circuit, the signal that comes out through first order phase inverter directly enters the CD4532 addressing, enter the trigger pip that CD4012 produces the PE end of voice IC through time-delay signal relatively through second level phase inverter, wherein delay circuit is employed is wherein two phase inverters of hex inverter CD40106.

The utility model compared with prior art has multimetering, and is highly sensitive, the sight protectio when not being only applicable to read, also be applicable to use computer, the vision protection device when seeing TV of playing games.

Description of drawings

Fig. 1 is a circuit FB(flow block) of the present utility model.

Fig. 2 be emission of the present utility model, reception, shaping amplify, from motion tracking, frequency-discriminating circuit schematic diagram.

Fig. 3 is a time-delay comparator circuit schematic diagram of the present utility model.

Fig. 4 is the utility model metering circuit schematic diagram.

Fig. 5 is the adjustable on-off circuit schematic diagram of the utility model time-delay.

Fig. 6 is physical circuit figure of the present utility model.

Embodiment

Below in conjunction with description of drawings the utility model is described in further detail: as shown in Figure 1, this device adopts infrared electronic technology, by infrared proximity transducer, differentiates the position relation of learner's face and desk specified point; Detect the bright and dark light degree of learner's desktop with photosensitive device.

Infrared sensing system adopts three identical infrared proximity transducers, be arranged in left, center, right 3 points in desk the place ahead respectively, middle one in order to the face of determining the learner whether too near desk, if too near (refer to eye from the distance of desktop less than 35cm) then trigger voice suggestion " too near "; About two whether too depart from the center line of desk in order to the head (or health) of determining the learner, if the sitting posture deflection then triggers voice suggestion, inform " just sit down, please ".

As shown in Figure 1 and Figure 2, the technology realization of infrared approaching feel sensing and corresponding circuit are as follows: infrared emission all adopts the infrared diode of peak wavelength at 940nm with reception.As accompanying drawing 2, the audio frequency town encircles IC mutually ₂(LM567) the tunable vibration of Shu Chu autotracking is through IC ₁The control triode is to drive infrared transmitting tube emission infrared pulse, after the infrared ray of reflected back is received by infrared receiving tube, through IC after three Sheffer stroke gate shapings (74HC04) ₁Other three Sheffer stroke gate shapings, amplify, enter IC ₂Carry out frequency discrimination, as the frequency and the IC of this received signal ₂When inner VCO frequency is consistent, IC ₂To produce a low level and trigger next stage time-delay comparator circuit.Because IC ₂Inner VCO frequency can be tuning by external resistor and capacitor component.Thereby, three transmission frequencies near sense sensor are strictly made a distinction to avoid the phase mutual interference.As shown in Figure 6, described audio phase locking ring IC ₂Adopt integrated circuit 567, its 6 pin connects an adjustable resistance; The transistor collector of controlling after three Sheffer stroke gate shapings connects an adjustable resistance.Regulate above-mentioned two resistance values, can regulate oscillation frequency or transistor emitter electric current, can reach the purpose of regulating responsive distance like this.

As Fig. 1, shown in Figure 3, under learner's unsteady state, report by mistake for fear of sensor.For example: raise one's hand or pick up action such as books false triggering voice suggestion.The special one-level time-delay comparator circuit that adds in each sensing head circuit is with filtering misoperation signal.Specific practice is that two phase inverters with CD40106 add resistance, container piece constitutes delay circuit, as shown in Figure 3, and by IC among Fig. 2 ₂(LM567) signal that comes out is behind first phase inverter, one the tunnel directly sends into scrambler CD4532, another road is after time-delay, enter two four input nand gate CD4012 through second phase inverter, if the time of facial proximity transducer is shorter than time-delay the time (being made as here 4 seconds) is set, then be considered as astable action, from IC ₂Signal behind first phase inverter, can not arrive second phase inverter, that is can not enter the signal that CD4012 generate to trigger voice IC, thereby avoid wrong report.

Two-stage circuit is identical before three infrared proximity transducers, as accompanying drawing 2, Fig. 3.So can take out six tunnel trigger pips from the time-delay comparator circuit of three sensing heads, 1,2,3 square frames that marked as accompanying drawing 6, wherein three the tunnel behind first order phase inverter, directly send into scrambler CD4532, enter the address of integrated speech IC with generation, three tunnel signals that compare through delaying time are through second phase inverter in addition, enter two four input nand gate CD4012, send into the PE port of voice IC with the trigger pip that produces integrated speech IC.Integrated speech IC is 20 seconds durations, can divide four sections speech recording and reproducing IC, can be by the B on it ₀, B ₁Address port is divided into four sections with its speech recording and reproducing segment addressing, triggers the recording playback sound by the address.The signal that each road sensing head will have-not delay time is sent into the address port B of voice IC earlier through the CD4532 addressing ₀, B ₁, and have only when another road through time-delay, the filtering short message when trigger pip of sending via CD4012 arrives the PE port of voice IC, could trigger the appropriate address section voice of speech chip, these voice will be by the output port P of voice IC ₀Drive sound horn through amplifying.

As Fig. 4, shown in Figure 6, light sensing probe system constitutes an on-off circuit by a photoresistance and a triode.When bright and dark light changes, the resistance of photoresistance will also be made linear change, by constituting the adjustable resistance of on-off circuit with triode, can set specific switch threshold values.

As accompanying drawing 4, the transistor switching circuit of photoresistance control, its switching signal also will enter the time-delay comparator circuit, and the signal that comes out through first order phase inverter directly enters the CD4532 addressing, enter the trigger pip that CD4012 produces the PE end of voice IC through time-delay signal relatively through second level phase inverter.Wherein delay circuit is employed is wherein two phase inverters of hex inverter CD40106.

Whole device adopts No. 5 chargeable battery power supplies of 4 joints, so that product portability, be the corresponding prolongation of stream time after whole device is once charged, increased the intermittent power supply control circuit at power unit, as accompanying drawing 5, add Resistor-Capacitor Unit by two phase inverters of CD40106 and constitute the adjustable on-off circuit of time-delay, pilot relay to be to finish circuit working 10 seconds, intermittently 15 seconds function.

In writing desk the place ahead in the face of the learner, place-60 ° of long boxes of angle wedge shape, the plastic cement structure is on the inclined-plane of box.In the face of three infrared proximity transducers of the facial disposed at equal distance of learner.The main induction of probe learner's the facial position of wedge shape box relatively.Circuit is by No. 5 rechargable battery power supplies of 4 joints, control three proximity transducers and a luminosity sensor discontinuous operation, each proximity transducer has a specific modulating frequency to avoid interference, different probes will trigger different voice suggestions, when the learner connects switch, when beginning to learn, its learning posture will be subjected to the supervision of sensing head and remind the incorrect of his sitting posture at any time.External special-purpose source of stable pressure can connect main frame to 220 volt civil power when charging, can pull out during study, by rechargeable battery powered work.

Claims

1. multifunction electronic vision protector; by transmitting after receiving circuit receives of radiating circuit output; send into warning circuit by signal amplification circuit and send alarm prompt; the frequency discriminator of different frequency carries out frequency discrimination to it is characterized in that importing the signal shaping amplification separately two groups of above position probing emissions, receiving trap; when the inner VCO frequency of the frequency of this received signal and frequency discriminator is consistent; frequency discriminator outputs signal to next stage time-delay comparator circuit, and triggers integrated speech chip generation voice suggestion.

2. multifunction electronic vision protector according to claim 1; it is characterized in that described position probing emission; receiving trap adopts three sensors; be arranged in the left side in the place ahead respectively; in; right 3 points; in the middle of the dead ahead one in order to detect longitudinal separation; about two whether too depart from center line in order to detect; the frequency discriminator that three groups of different frequencies of input are amplified in above-mentioned signal shaping carries out frequency discrimination; when the inner VCO frequency of the frequency of this received signal and frequency discriminator is consistent; by next stage time-delay comparator circuit input nand gate, and trigger integrated speech chip generation voice suggestion.

3. multifunction electronic vision protector according to claim 1 and 2 is characterized in that described sensor adopts infrared diode, and the audio frequency town encircles IC mutually ₂The tunable vibration of autotracking of output is through IC ₁Three Sheffer stroke gate shapings after the control triode to drive infrared transmitting tube emission infrared pulse, after the infrared ray of reflected back is received by infrared receiving tube, through IC ₁Other three Sheffer stroke gate shapings, amplify, enter IC ₂Carry out frequency discrimination, as the frequency and the IC of this received signal ₂When inner VCO frequency is consistent, IC ₂To produce a low level and trigger next stage time-delay comparator circuit.

4. according to the multifunction electronic vision protector of claim 1 or 2, it is characterized in that described time-delay comparator circuit adds resistance, capacitor element formation delay circuit with filtering misoperation signal, C with two phase inverters of CD40106 ₂The signal that comes out is behind first phase inverter, and one the tunnel directly sends into scrambler CD4532, and another road is after time-delay, enter two four input nand gate CD4012 through second phase inverter, the time of proximity transducer is shorter than time-delay the time is set face to face, then is considered as astable action, from IC ₂Signal behind first phase inverter, can not arrive second phase inverter, do not enter the signal that CD4012 generate to trigger voice IC.

5. the multifunction electronic vision protector of stating according to claim 4; it is characterized in that described time-delay comparator circuit takes out six tunnel trigger pips; wherein three the tunnel behind first order phase inverter, directly send into scrambler CD4532; enter the address of integrated speech IC with generation; three tunnel signals that compare through delaying time are through second phase inverter in addition; enter two four input nand gate CD4012, send into the PE port of voice IC with the trigger pip that produces integrated speech IC.

6. according to the multifunction electronic vision protector of claim 5, it is characterized in that integrated speech is 20 seconds durations, can divide four sections speech recording and reproducing IC, can be by the B on it ₀, B ₁Address port is divided into four sections with its speech recording and reproducing segment addressing, triggers the recording playback sound by the address; The signal that each road sensing head will have-not delay time is sent into the address port B of voice IC earlier through the CD4532 addressing ₀, B ₁, and have only when another road through time-delay, the filtering short message when trigger pip of sending via CD4012 arrives the PE port of voice IC, could trigger the appropriate address section voice of speech chip, these voice will be by the output port P of voice IC ₀Drive sound horn through amplifying.

7. multifunction electronic vision protector according to claim 1; it is characterized in that light sensing probe system constitutes an on-off circuit by a photoresistance and a triode; the resistance of quick resistance will also be made linear change; by constituting the adjustable resistance of on-off circuit, can set specific switch threshold values with triode.

8. the multifunction electronic vision protector of stating according to claim 7; the transistor switching circuit that it is characterized in that photoresistance control; its switching signal also will enter the time-delay comparator circuit; the signal that comes out through first order phase inverter directly enters the CD4532 addressing; enter the trigger pip that CD4012 produces the PE end of voice IC through time-delay signal relatively through second level phase inverter, wherein delay circuit is employed is wherein two phase inverters of hex inverter CD40106.