Human reaction sensitivity tester
A tester and sensitivity technology, applied in the field of physical demonstration teaching aids, can solve problems such as non-interactive and uninteresting students, and achieve the effect of simple structure, simple materials and convenient operation
Inactive Publication Date: 2009-12-02
上海市嘉定区第二中学
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Problems solved by technology
The disadvantages of various existing experimental devices are: not interactive, students are not interested
Method used
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Embodiment
[0025] 1) The control box is made of plexiglass, 355mm long and 110mm high.
[0026] 2) A plexiglass tube with a height of 750 mm and a diameter of 15 mm is used for the support.
[0027] 3) The enameled wire is a copper wire with a diameter of 0.5mm on an electromagnet soft iron with a diameter of 4mm and a length of 25mm for 100 turns.
[0028] 4) if figure 2 , 3 Connect all the lines, and the circuit lines pass through the bracket tube.
[0029] 5) The test ruler is 300mm long, and the reaction time is engraved on the ruler.
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The invention discloses a sensitivity tester which comprises a control box, a bracket, an electromagnet, a loop, a delay time relay, a testing ruler, batteries and a button switch, wherein the delay time relay and the batteries are fixed in the control box by screws; the electromagnet and the loop are fixed at the top of the bracket by screws, and the lower end of the bracket is inserted into the control box; and the testing ruler is sucked at the top of the bracket by the electromagnet. The invention has the advantages of easily-obtained materials, simple structure, convenient operation, low cost and more remarkable effect compared with the similar demonstration experiment.
Description
Technical field: [0001] The invention relates to a teaching aid for physics demonstration, in particular to a teaching aid for testing people's reaction sensitivity by using the law of free fall. Background technique: [0002] In middle school physics teaching, free fall is not only the key content of teaching but also the difficult content of teaching. The degree of understanding of the law of free fall directly affects the students' cognition level of kinematic laws. The disadvantages of various existing experimental devices are: they are not interactive, and students are not interested. Invention content: [0003] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a sensitivity testing device with strong interaction and game nature, so that students can learn knowledge and recognize laws in the game. [0004] Goal of the invention of the present invention is achieved through the following technical solutions: [0005] A sen...
Claims
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IPC IPC(8): A61B5/16G09B19/00
Inventor 蔡文学姚成兴董洁婷周礼邦
Owner 上海市嘉定区第二中学
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