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Photosensitive sensor

A sensor and sensitive technology, applied in the field of sensors, can solve the problems of lack of teaching aids, poor intuitiveness of metal thermal expansion and cold contraction teaching, etc., and achieve the effect of improving hands-on ability and learning enthusiasm

Inactive Publication Date: 2012-01-11
SHANGHAI JINGAN DISTRICT NO 2 CENT PRIMARY SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, there are generally no special teaching aids when teaching natural sciences to preschool children and low-grade students, especially for the teaching of thermal expansion and contraction of metals, which is less intuitive

Method used

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  • Photosensitive sensor
  • Photosensitive sensor

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawing:

[0012] Such as figure 1 Shown, a kind of photosensitive sensor comprises base plate 1 and fixed support 2 fixed on the base plate 1 by four supporting legs 9; A disk 12 is arranged on the right top of described fixed support 2; A rotating shaft 7 is fixed at the center of the circle of 12, and the rotating shaft 7 is fixed on the fixed support 2 through a bearing; a reflector 6 with a mirror surface facing upward is also provided at the center of the disc 12, and the reflector 6 passes through The support device is supported on the base plate 1; directly above the reflector 6, a fixed plate 5 is fixed on the edge of the disc 12, and a fixed plate 5 is fixed on the fixed plate 5 to face the disc in the direction of emission. The semiconductor laser emitter 4 of the center of circle of 12; Also be fixedly connected with a measured metal strip 3 between the left top of descri...

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PUM

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Abstract

The invention relates to a sensor, in particular to a photosensitive sensor. A reflection mirror with one face facing upwards is arranged on the center of a disc, and the reflection mirror is supported on a soleplate through a supporting device; a fixed plate is fixed on the edge of the disc right above the reflection mirror, and a semiconductor laser transmitter with the transmission direction facing towards the center of the disc is fixed on the fixed plate. In the beginning, an incidence angle and a reflection angle are zero. When the temperature is changed, the metal to be detected is deformed, so the disc rotates for a small angle, and the reflected light can rotate for twice angle. The light can be reflected onto the wall or on the ceiling of the roof, so the movement of an acupuncture needle can be clearly seen. The photosensitive sensor is a teaching aid for demonstrating the hot expansion and cold shrinkage of the metal, can be used for teaching children before school age and the low-grade students about natural science, not only is lively but also can be directly viewed, can draw the attention of the students, and can improve the learning positivity of the students.

Description

technical field [0001] The invention relates to a sensor, in particular to a photosensitive sensor. Background technique [0002] In the prior art, there are generally no special teaching aids when teaching natural sciences to preschool children and low-grade students, especially the teaching of thermal expansion and contraction of metals is poorly intuitive. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a light-sensitive sensor with simple structure, convenient manufacture and clear demonstration of thermal expansion and contraction of metals. The light-sensitive sensor is easy to adjust and has a wide field of vision. [0004] In order to solve the above-mentioned technical problems, the photosensitive sensor includes a base plate and a fixed bracket fixed on the base plate through four legs; a disk is arranged on the right top of the fixed bracket; There is a rotating shaft, which is fixed on the fixed brac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/16
Inventor 邓建民杨千影
Owner SHANGHAI JINGAN DISTRICT NO 2 CENT PRIMARY SCHOOL