Pendulum contrast demonstration circuit and instrument

A circuit and relay technology, applied in the field of pendulum comparison demonstration circuits and instruments, can solve the problems of large error and low efficiency, and achieve the effect of accurate automatic counting, accurate experimental conclusions and time saving.

Inactive Publication Date: 2019-08-20
孟庆伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The elementary school science "Pendulum" lesson needs to experiment to explore "what factors are related to the speed of the pendulum". The traditional method is to hang a heavy object under a thin thread, swing it back and forth, operate with multiple people, measure the pendulum length many times, and manually time and count. 27 experiments, low efficiency and large error

Method used

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  • Pendulum contrast demonstration circuit and instrument
  • Pendulum contrast demonstration circuit and instrument
  • Pendulum contrast demonstration circuit and instrument

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 with image 3 As shown, the pendulum comparison demonstration circuit includes a plurality of photoelectric switches 7 (A1, A2, A3), a plurality of counters 9 (B1, B2, B3), a second timing relay 8, a plurality of magnetic coils 1, a first timing Relay 3, start switch 4, magnetic coil lamp 2, power supply lamp 5, work indicator light 6 and stop counting indicator light 10, magnetic coil 1 is seven, and the positive ends of the power supply of multiple magnetic coil 1 are respectively connected to the first The positive power output terminal of a timing relay 3 and the negative power terminals of a plurality of magnetic coils 1 are respectively connected to the negative power output terminal of the first timing relay 3, and the positive power terminal of the first timing relay 3 is used to connect with the start switch 4 , for connection to the positive terminal of the power supply. The first timing relay can also be replaced by a temperature controller...

Embodiment 2

[0028] The pendulum comparison demonstration circuit includes three photoelectric switches and three counters, the control terminals of the three photoelectric switches are respectively connected to the trigger signal terminals of the three counters, and the positive and negative terminals of the power supply of the three photoelectric switches are respectively connected to the power supply The positive and negative poles of the three counters are connected to the positive and negative poles of the power supply respectively. Timing and counting circuits are integrated and modularized to reduce costs.

[0029] Further, it may also include a second timing relay, the positive terminal of the power supply of the second timing relay is connected to the positive pole of the power supply, or the positive terminal of the power supply of the second timing relay is connected to the positive pole of the power supply through a switch circuit, and the first The positive terminals of the po...

Embodiment 3

[0035] Such as figure 2As shown, this embodiment provides a pendulum comparison demonstration instrument, in addition to the pendulum comparison demonstration circuit described in the above embodiments, it also includes a display board, a pendulum and a cycloid, and the pendulum is fixed at one end of the cycloid , the other end of the cycloid is connected to the display board. The pendulum includes materials or alloys such as iron and nickel that can be adsorbed by the magnet, or it is designed to be adsorbed only on one side close to the magnetic coil. The cycloid and the pendulum are not limited to this design. Can be designed as required. The length of the cycloid, the weight of the pendulum, and the size of the pendulum angle are not limited to those shown in this design. The pendulum comparison demonstration instrument includes 2 industrial timing relays, 3 industrial counters, 3 square photoelectric switches, 7 12-volt electromagnets, 1 12-volt battery, 1 12-volt cha...

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PUM

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Abstract

The invention relates to a pendulum contrast demonstration circuit and an instrument. The pendulum contrast demonstration circuit comprise a plurality of photoelectric switches and a plurality of counters, wherein the control ends of the photoelectric switches are connected to trigger signal ends of the counters correspondingly; the power supply positive pole ends and power supply negative pole ends of power supplies of the photoelectric switches are connected to the positive pole and negative pole of a power supply correspondingly; and the power supply positive pole ends and the power supplynegative pole ends of the counters are further connected to the positive pole and the negative pole of the power supply correspondingly. Due to the adoption of the scheme, automatic timing and automatic counting are accurate and error free, and the experimental conclusion is accurate. The "pendulum contrast demonstration circuit and instrument" is applied to the experimental teaching of "pendulum"in primary school science. Multiple pendulums are compared for experiments at the same time, the time is saved.

Description

technical field [0001] The invention belongs to the field of electronics, in particular to a pendulum comparison demonstration circuit and an instrument. Background technique [0002] The elementary school science "Pendulum" lesson needs to experiment to explore "what factors are related to the speed of the pendulum". The traditional method is to hang a heavy object under a thin thread, swing it back and forth, operate with multiple people, measure the pendulum length many times, and manually time and count. 27 experiments, low efficiency and large error. The majority of teachers and students are in urgent need of a device that can simplify the experimental steps and reduce the experimental time. Contents of the invention [0003] The purpose of the present invention is to propose a pendulum comparison demonstration circuit and instrument, automatic timing and automatic counting are accurate, and experimental conclusions are accurate. [0004] The technical embodiment of...

Claims

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Application Information

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IPC IPC(8): G09B23/18
CPCG09B23/181G09B23/183
Inventor 孟庆伟
Owner 孟庆伟
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