CN2142787Y - Vision-protecting file - Google Patents
Vision-protecting file Download PDFInfo
- Publication number
- CN2142787Y CN2142787Y CN 92245222 CN92245222U CN2142787Y CN 2142787 Y CN2142787 Y CN 2142787Y CN 92245222 CN92245222 CN 92245222 CN 92245222 U CN92245222 U CN 92245222U CN 2142787 Y CN2142787 Y CN 2142787Y
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- CN
- China
- Prior art keywords
- circuit
- file
- infrared
- control box
- alarm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Emergency Alarm Devices (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The utility model relates to a vision-protecting file, which comprises an infrared control box and a file. The infrared control box is positioned on one side of the file; an infrared emission circuit, a distance testing circuit, an illumination intensity detecting circuit, an alarm circuit and a power source are arranged in the infrared control box; an infrared emission hole, an infrared reception hole, an illumination intensity detecting hole, an alarm display device, and a selection switch of the power source and the alarm mode are arranged on the infrared control box. The vision-protecting file is convenient to be carried, the position can be accurately detected, and the use place, time and position can not be limited. The vision-protecting file is also provided with an illumination intensity detecting device to ensure enough illumination intensity for the students when learning. The vision-protecting file is provided with four alarm forms of the modulation light alarm form, the non-modulation light alarm form, the modulation sound alarm form and the non-modulation sound alarm form.
Description
The utility model relates to a kind of infrared light eye protection stationery.
Vision protection device has various ways.
The CN2076832U patent application discloses a kind of comprehensive pre-myopia prevention earphone, the version of employing earphone and comprehensive position switch mechanism and photometry, warning circuit mechanism.
The CN2079495U patent application discloses the pre-myopia prevention protector of a kind of sound and light alarm, mainly is made up of warning box, earflap sheet, buzzing earmuff, light-emitting component and connector that the mercury microswitch is housed in one.
The CN2067144U patent application discloses a kind of pre-myopia prevention electronics, comprises wearing overhead transmitter unit and the reception indicating member of putting on the table, receives indicating member and comprises a light emitting diode, LC in parallel loop and acoustics circuit.
The CN2082611U patent application discloses a kind of vision protection device of mainly being made up of ultrasonic wave emission, receiving element and alarm unit etc.
The CN2082612U patent application discloses a kind of monitoring alarm of being made up of jointly photo resistance photometry warning circuit and the attitude monitoring component that is provided with thereof before photo resistance.
Existing " myopia prevention desk lamp " is made up of desk lamp, a pair of infrared emission reception arm and the related circuit that stretches out forward.When people's head lean forward enter receive and launcher arm between the time, promptly interdict light path, send alarm signal thereupon.This product has illumination and myopia prevention double action, and suitable student is in and learns to use night, but there are the following problems, and at first, this product is essentially semi-fixed type, and the place of use is restricted; Secondly only use when turning on light, the time of use is restricted; In addition, because detected position quantity depends on the position that desk lamp is placed, therefore only when a certain ad-hoc location of placement, can correctly bring into play its real effect, the position of use is restricted.
The purpose of this utility model is to provide a kind of place to use, time and position unrestricted, and the head and the desk distance that can detect the people too closely can detect the not enough sight protectio file of illumination again.
The utility model comprises infrared control box and file, the infrared control box is positioned at a side of file, place the infrared light radiating circuit in the infrared control box, apart from testing circuit, luminance detection circuit, warning circuit and power supply, one end of infrared control box is established the infrared emission hole, the other end of infrared control box is established infrared receiver hole, also is provided with luminance detection hole, alarm indication device and power switch and type of alarm selector switch on the infrared control box.The infrared light radiating circuit comprises carrier oscillator, carrier modulator and infrarede emitting diode.
Infrared light comprises infrared receiving tube, resonance amplifier and intensity detector apart from testing circuit, and the output of intensity detector is connected with warning circuit.
The luminance detection circuit comprises light intensity detector and threshold circuit, and the output of threshold circuit is connected with warning circuit.
Warning circuit is reported to the police by oscillator harmony, light and type of alarm selector switch device is formed.
The utlity model has following advantage.
1, easy to carry, carry dry cell as power supply, the student can put school bag into and carry, and also can take, and uses at any time in any place in school, family even park.
2, position probing is accurate, adopts the infrared emission be mutually certain angle to receive head as position probing, and when people's head entered a certain ad-hoc location, reverberation can reach maximum intensity, reduces the error that the albedo difference because of reverberation causes effectively.Writing backing plate or file form are adopted in appearance design, are looked the position of thing and are determined.The two combination is guaranteed the accuracy of position probing.Be to improve antijamming capability, adopt modulated infrared light emission, resonance amplifier receive mode, the influence of surround lighting is reduced to bottom line.
3, be provided with illumination testing apparatus, when ambient light is too weak, send alarm signal immediately, avoid the student under the not enough condition of illumination, to learn.
4, be provided with four kinds of warning forms: light modulated (flash of light), non-modulation light, modulated acoustic, non-modulation sound.Selection sound, two kinds of type of alarms of light also can be distinguished alarm signal too near because of distance or that illumination is sent inadequately easily easily.
Fig. 1 is sight protectio folder structure figure.
Fig. 2 is a circuit block diagram in the sight protectio file infrared control box.
Fig. 3 is circuit theory diagrams in the sight protectio file infrared control box.
Embodiment
As shown in Figure 1; the sight protectio file comprises infrared control box (1) and file (2); place the infrared light radiating circuit in the infrared control box, apart from testing circuit and luminance detection circuit, warning circuit and power supply; one end of box is established infrared emission hole (3); the other end of box is established infrared receiver hole (4), also is provided with luminance detection hole (5), alarm lamp (6) and power switch and type of alarm selector switch (7) on the box.On file, can set up clip (18).
As shown in Figure 2, the infrared light radiating circuit comprises carrier oscillator (8), carrier modulator (9) and infrarede emitting diode (10), and the infrared light that sends reflects through reverberation (11).Infrared light comprises that apart from testing circuit the output signal of infrared receiving tube (12), resonance amplifier (13), intensity detector (14), intensity detector is connected with alarm (15).The luminance detection circuit comprises light intensity detector (16) and threshold circuit (17), and the output signal of threshold circuit is connected with alarm.
Fig. 3 provides circuit theory diagrams.
1, apart from the testing circuit operation principle:
M3, R19, R20, D4, C10 forms the 0.5Hz narrow-pulse generator, and with M7, R21, R22, C11, C12, the 32768Hz carrier generator that JT forms is compound at M6.Through C13, the R23 differential, the M8 shaping, BG7 amplify to drive infrarede emitting diode D6, to send a burst pulse modulated infrared light that is loaded with the 32768Hz fundamental frequency in 2 seconds at interval.Meanwhile, by BG5, BG6, R14, the power supply synchro switch that R15 forms are the receiving unit power supply.At this moment,, this light modulated is reflected to infrared receiving tube D1, convert the signal of telecommunication to through D1 if there is reverberation to exist in the light path, be coupled to BG1 by C2, R3, R4, R5, D2, D3, C3, the resonance amplifier that L1 forms amplifies, and L2 is coupled to BG2, BG3, R7, R8, R9, the direct coupled amplifier that C6 forms amplifies once more, exports through the BG4 detection.When the rectified signal level reaches by M1, C9 is during controlled oscillator threshold level that R16 forms, M1 starting oscillation (supposition A point this moment is a high level) is controlled by M4 C14 after M5 is anti-phase, the controlled oscillator that R25 forms produces intermittent oscillation, exports the keyed pulse of a string 2kHz.Look the difference of K switch position, promptly " pout, pout " exportable intermittence sound or flashing signal.Remind user's head (reverberation) to withdraw from this zone.
2, luminance detection circuit working principle:
The luminance detection circuit is made up of photo resistance R17 divider resistance R18.When ambient light illumination was higher than setting value, the A point was a high level, is able to operate as normal apart from testing circuit.When ambient light illumination is lower than when setting value, A point be a low level, and though this moment M1(apart from the detection output) output state how, M5 exports and is high level.Controlled oscillator M4 exports continuous impulse.Piezoelectric ceramic piece HTD sends long " toots " sound or light emitting diode D5 is long bright, submits to the user to turn on light or transfers to bright place and use.
Component of the present utility model for details see attached table.
Subordinate list:
R1 100K R21 10M C13 470PF
R2 1.3K R22 120K C14 1000PF
R3 56K R23 11K C15 100μF
R4 13K R24 1.3K
R5 470Ω R25 160K D1 2DU3
R6 680Ω R26 10Ω D2 1N4148
R7 10K R27 1.3K D3 1N4148
R8 20K D4 1N4148
R9 6.8K C1 0.47μF D5 LED
R10 120K C2 1000PF D6 HG401
R11 1M C3 33nF
R12 1M C4 0.1μF BG1 9012
R13 100Ω C5 1000PF BG2 9013
R14 100K C6 4.7μF BG3 9013
R15 56K C7 4.7μF BG4 9012
R16 100K C8 0.01μF BG5 9012
R17 photo resistance C9 4.7 μ F BG6 9013
R18 120K C10 0.47μF BG7 9013
R19 4.7M C11 39PF IC
1CD4093
R20 56K C12 39PF IC
2CD4011
Claims (3)
1, a kind of sight protectio file comprises the infrared control box, is provided with the infrared light radiating circuit in the box and apart from testing circuit and warning circuit and power supply, and warning circuit comprises sound, light alarm indication device, it is characterized in that
(1), be provided with file, the infrared control box is positioned at a side of file;
(2), also be provided with the luminance detection circuit, the luminance detection circuit comprises light intensity detector and threshold circuit, and the output of threshold circuit is connected with warning circuit;
(3), an end of infrared control box establishes the infrared emission hole, the other end of infrared control box is established infrared receiver hole, also is provided with luminance detection hole, alarm indication device and power switch and type of alarm selector switch on the box.
2, file as claimed in claim 1 is characterized in that infrared light comprises infrared receiving tube, resonance amplifier and intensity detector apart from testing circuit, and the output of intensity detector is connected with warning circuit.
3, file as claimed in claim 1 is characterized in that setting up clip on file.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92245222 CN2142787Y (en) | 1992-12-17 | 1992-12-17 | Vision-protecting file |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92245222 CN2142787Y (en) | 1992-12-17 | 1992-12-17 | Vision-protecting file |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2142787Y true CN2142787Y (en) | 1993-09-29 |
Family
ID=33784228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92245222 Expired - Fee Related CN2142787Y (en) | 1992-12-17 | 1992-12-17 | Vision-protecting file |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2142787Y (en) |
Cited By (1)
| 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 |
-
1992
- 1992-12-17 CN CN 92245222 patent/CN2142787Y/en not_active Expired - Fee Related
Cited By (1)
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |