CN202939882U - Illumination sensing principle demonstration instrument - Google Patents

Abstract

The utility model provides an illumination sensing principle demonstration instrument, comprising a box, a light source connected with an intensity control portion, and a photoresistor, a biasing circuit, an amplification circuit, an A/D converter, a one-chip microcomputer, and a display connected in series. The above experiments show that data and curves displayed on a demonstration device liquid crystal screen can preferably demonstrate relations between resistance values and measurands, so that students can visually see that when external measurands change, how outputs (resistance values) of sensors change, how physical laws written in books work, and what application do the physical laws have in actual fields. In addition, in manufacturing and development of demonstrative experiment devices, students can participate in scientific manufacturing activities which are beneficial for motivating students' personality development, so that students receive basic training of scientific research, and scientific literacy and comprehensive abilities of students can be improved in an all-round manner.

Description

Illumination sensing principle demonstrator

Technical field

The utility model relates to the educational facilities field, and a kind of illumination sensing principle demonstrator is provided.

Background technology

College Physics is an experimental science, and learning physics be unable to do without experiment. and under the overall situation of current innovative education, the physics demonstration experiment teaching is indispensable important teaching means in college physics teaching, can play immeasurable effect.

Due to the physics demonstration experiment employing is the method for " performance experiment ", be different from other any experiments, it is that the teacher performs operation, give the student with lively distinctness and deep visual impression. and the use of comprehensive demonstration device not only can improve the student to the understanding of various physical phenomenons, key concept.See that in sensor, reigning physics law works under what conditions with making student's true feeling; And can also be punctured into the practical application in various engineerings in experiment, developing student's outlook is one of a kind of the most effective object teaching method of student's acquire knowledge, tempers and cultivate student's spirit of exploration and creative quality.

The utility model content

The purpose of this utility model is to provide a kind of illumination sensing principle demonstrator.

The utility model is for achieving the above object by the following technical solutions:

A kind of illumination sensing principle demonstrator is characterized in that: comprise casing, be arranged on black box testing part, display and integrated circuit part in casing;

Described black box testing partly comprises black box, light source and photoresistance, and described black box adopts lighttight hermetically-sealed construction;

Described integrated circuit partly comprises biasing circuit, amplifying circuit, A/D converter, the single-chip microcomputer that is linked in sequence;

The photoresistance of described black box testing part is connected with the biasing circuit of integrated circuit part, and described display is connected with the single-chip microcomputer of integrated circuit part, and described light source is provided with the strength control part of controlling the light source intensity of illumination.

The utlity model has following beneficial effect:

can find out by above experiment, the data of apparatus for demonstrating liquid crystal screen display and curve can well be demonstrated out the relation between resistance value and measurand, allow the student see intuitively, but during extraneous measured changing, how the output of sensor (resistance) changes, how the physical law that books are said and physics law work, what has use in practical field, the making of demonstrating experiment device exploitation in addition, can also allow the student participate in scientific and technological creative activity, be conducive to excite student's personality development. allow the student be subject to the propaedeutics of research work, improve student's scientific literacy and integration capability comprehensively.

Description of drawings

Fig. 1 is casing figure of the present utility model;

Fig. 2 is system block diagram of the present utility model;

In figure, 1 is that black box testing part, 2 is that display, 3 is the integrated circuit part.

Embodiment

A kind of illumination sensing principle demonstrator is characterized in that: comprise casing, be arranged on black box testing part, display and integrated circuit part in casing;

Described black box testing partly comprises black box, light source and photoresistance, and described black box adopts lighttight hermetically-sealed construction;

Described integrated circuit partly comprises biasing circuit, amplifying circuit, A/D converter, the single-chip microcomputer that is linked in sequence;

The photoresistance of described black box testing part is connected with the biasing circuit of integrated circuit part, and described display is connected with the single-chip microcomputer of integrated circuit part, and described light source is provided with the strength control part of controlling the light source intensity of illumination.

can find out by above experiment, the data of apparatus for demonstrating liquid crystal screen display and curve can well be demonstrated out the relation between resistance value and measurand, allow the student see intuitively, but during extraneous measured changing, how the output of sensor (resistance) changes, how the physical law that books are said and physics law work, what has use in practical field, the making of demonstrating experiment device exploitation in addition, can also allow the student participate in scientific and technological creative activity, be conducive to excite student's personality development. allow the student be subject to the propaedeutics of research work, improve student's scientific literacy and integration capability comprehensively.

Claims (1)

1. an illumination sensing principle demonstrator, is characterized in that: comprise casing, be arranged on black box testing part, display and integrated circuit part in casing;

Described black box testing partly comprises black box, light source and photoresistance, and described black box adopts lighttight hermetically-sealed construction;

Described integrated circuit partly comprises biasing circuit, amplifying circuit, A/D converter, the single-chip microcomputer that is linked in sequence;

The photoresistance of described black box testing part is connected with the biasing circuit of integrated circuit part, and described display is connected with the single-chip microcomputer of integrated circuit part, and described light source is provided with the strength control part of controlling the light source intensity of illumination.

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