CN2236647Y

CN2236647Y - Optic measuring device

Info

Publication number: CN2236647Y
Application number: CN 95245127
Authority: CN
Inventors: 石世鉴
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-17
Filing date: 1995-07-17
Publication date: 1996-10-02
Anticipated expiration: 2005-07-17

Abstract

The utility model relates to a device which can be used for measuring whether the illuminance of a learning environment is scientific, particularly an optic measuring device. The aim of the utility model is to protect people's vision. The utility model is characterized in that the input terminal 6 of an integrated block IC 1 is connected with a photoresistor MG, and the output terminal 3 is connected with a lighting diode D1 and a transistor BG. The output terminal of the transistor GB is connected with a lighting diode D2 and a sounding compositive slice IC 2. After the utility model is tested, the utility model has the advantages of good effect, metering accuracy, stable performance and convenient carrying. When the light is less than 500 LX, the utility model can alarm. The utility model has convenient use and can not only be used alone but also be assembled in other articles, and the utility model can be jointly used.

Description

Light measurer

The utility model is the device that test meets the illuminance of science learning environment, protection people eyesight, i.e. light measurer.

In background technology, carry out the eyesight investigation according to 7～12 years old student of Han nationality to national 29 provinces and cities 850,000, mean vision lowly is 34.30%; age is big more, and the low vision rate is high more, is up to 74%; therefore, should extensively be paid attention to by society, school, family teen-age sight protectio.Once occurred sale similar articles for use such as " student eyesight fender brackets " on the market, its purpose mainly is to help the student just sitting, and head is raised, and makes between eye and writing notebook, the book apart from reaching rational requirement.Its structure is to make scalable, can support certain height and just sit to adapt to different students.The structure that has is to be enclosed within on student's arm, wherein adorns transversal switch and low-side switch, and the volt or the curved back of the body are bowed before the student, and switch closure gives the alarm.Though these can make the student play correct guiding from the sitting posture that writes, reads a book.But the low factor that affects one's power of vision is a lot, and when wherein reading was learnt, illumination condition was poor, is one of major reason, does not but often cause enough attention.Illumination is according to the science requirement, and the light illumination of adaptive learning environment should be 500LX～1000LX (Lux).

The purpose of this utility model also is the principle that influences people's eyesight key factor according to illuminance, design a kind of light measurer, both can use separately, also can be mixed into one with kinds of processes product such as ball pen, writing cases uses, reach people's photometry at any time, adjust light luminance, meeting the destination of study under the science illumination condition.

Technical solution of the present utility model is as follows:

Comprise: integrated IC2 of amplifying triode BG emitter and sending and receiving sound and light emitting diode D2,2 of the integrated IC2 that pronounce is connected piezo Y with 3 ends and reports to the police, be characterized in: 6 ends of integrated IC1 of illumination contrast connect photoresistance MG, the output of 3 ends of integrated IC1 connects can be under the above illumination of 500LX luminous diode D1, and the 3 ends output of integrated IC1 also connects by amplifying triode BG can be at the light emitting diode D2 that is lower than luminous warning under the 500LX illumination and integrated IC2 of pronunciation.

Description of drawings of the present utility model is as follows:

Fig. 1 is that the photometry pen partly cuts open synoptic diagram.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the circuit working schematic diagram.

Above-mentioned number in the figure is described as follows:

The 1-switch, 2-battery, 3-pilot lamp, 4-photoresistance, 5-screw, 6-penholder, IC1-model LM211, MG-photoresistance 5226, the IC2-integrated TM10 that pronounce, Y-piezo.

Be that the utility model adjoint is described in further detail below: referring to Fig. 1,, the utility model is installed in the ball pen, claims the photometry ball pen for easy to carry.Still can write in penholder 6 lower ends, assemble with screw 5 bottom, top appears photoresistance 4 successively, pilot lamp 3, one of them green light, expression safety, when being 500LX～1000LX (Lux), luminance brightness shows that another red colored lamp be luminous and report to the police battery 2 and switch 1 same penholder 6 tops that are contained in during less than 500LX, the utility model photometry is a core, and penholder is a carrier.Referring to Fig. 2, this is penholder 6 profiles, and the utility model both can be installed in propelling pencil, ball pen, the pen, also can be assemblied in writing case and the handicraft thereof.Referring to Fig. 3, in circuit theory diagrams, the input end 6 of illumination contrast ic chip 1 connects the contact of photoresistance MG and resistance R 8, node connects 7 ends of ic chip 1 between the resistance R 6 of series connection and the R7, the 1 terminating resistor R4 and the capacitor C 1 of ic chip 1, the 2 termination capacitor C1 other ends and the resistance R 3 of ic chip 1, ic chip 1 output terminal 3 meets green LED D1 through resistance R 2, its 3 end also connects 1 end of red light emitting diodes D2 and integrated IC2 of pronunciation through amplifying triode BG, the output terminal 2 of integrated IC2 of pronouncing is connected piezo Y with 3, triode BG base stage connects power end through biasing resistor R1.Whole principle of work is: photoresistance MG photometry, illumination contrast ic chip 1 is through contrast, by 3 ends output comparison signal, when illumination during greater than 500LX, diode D1 sends green light, illustrate bright and clear, when illumination during less than 500LX, diode D2 sends ruddiness, and by piezo Y sounding, inform that the illuminance of crossing the threshold is poor, need make corresponding adjustment.Whole work is by the conducting of K switch control circuit.

Advantage of the present utility model and effect are as follows:

1, the utility model is simple in structure, and is small and exquisite, can use separately, also can Load in mixture with other article and to be integrated use, simple to operate, photometry is accurate, and is easy to carry, This is characteristics of the present utility model.

2, effectively photometry of the utility model, and pilot light degree of illuminating are less than 500LX The time, i.e. acoustic luminous warning makes people know the study of should not reading a book of this illuminance, thereby Adjust on one's own initiative light luminance, avoided illuminance to affect not enough the disastrous effect of eyes, protect Protect eyesight, this is second characteristic of the present utility model.

3, the utility model can also be adjusted the sounding alarm circuit, can send faint sound, also can remove the pronunciation sheet, only stay luminous warning, can avoid so quietly disturbing others under the environment, in like manner, also can be in the pronunciation integrated package fixedly language customized, as send " light luminance is not enough, please improve brightness ".Deng other Languages, acousto-optic is reported to the police simultaneously.

Claims

1, light measurer, comprise warning circuit, it is characterized in that: (6) end of integrated IC1 of illumination contrast connects photoresistance MG, and (3) end output of integrated IC1 connects can be under the above illumination of 500LX luminous diode D1, and (3) end output of integrated IC1 connects warning circuit.

2, light measurer according to claim 1 is characterized in that: in warning circuit, amplifying triode BG emitter connects red light emitting diodes D2.

3, light measurer according to claim 1 is characterized in that: in warning circuit, amplifying triode BG emitter connects integrated IC2 of pronunciation, and (2) of the integrated IC2 that pronounce are connected piezo Y pronunciation with (3) end.