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Design method of system for monitoring number of students in classroom

A technology of monitoring system and design method, which is applied in the field of applied electronics, can solve problems such as maintenance difficulties for non-professional ordinary users, difficulty in promoting and using in rural primary and middle schools, and achieve the effects of broad practical value, convenient installation and maintenance, and low price

Inactive Publication Date: 2014-06-25
吴勇灵
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a design method for a monitoring system for the number of people in a classroom, which solves the shortcomings in the prior art that non-professional ordinary users are difficult to maintain and rural primary and secondary schools are difficult to popularize and use

Method used

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  • Design method of system for monitoring number of students in classroom
  • Design method of system for monitoring number of students in classroom
  • Design method of system for monitoring number of students in classroom

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Embodiment Construction

[0014] In practical application, it should be as follows figure 1 As shown, the 2 pins of the HN911 pyroelectric infrared sensor correspond to the image 3 The A and B terminals of the thousand-base reversible counter are connected; it should be as follows figure 2 As shown, the HN911 pyroelectric infrared sensor A is installed on the outside of the door frame, and the HN911 pyroelectric infrared sensor B is installed on the inside of the door frame. The distance between the two sensors is optimal so that the human signal can be collected at the same time when the person is between the two. , the height of the sensor from the ground depends on the actual situation.

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Abstract

The invention discloses a design method of a system for monitoring the number of students in a classroom. In the design method of the system for monitoring the number of students in the classroom, HN911 pyroelectric infrared sensor modules are combined with small and medium-sized integrated circuits 74LS192, 74LS47, 74LS08 and 74LS86, a digital display tube and the like. In the system, two HN911 pyroelectric infrared sensor modules are arranged at the gate of the classroom and are used for acquiring information about people entering the classroom, reversible counting (up counting is performed when students enter the classroom, and down counting is performed when students exit from the classroom) is performed by using thousand-system reversible counters consisting of 74LS192, 74LS08 and 74LS86, a binary number is converted into a decimal number through a 74LS47 decoder, and the digital display tube is used for displaying a decimal number counting result. The system has the functions of monitoring and counting the number of students in the classroom timely and resetting, has the characteristics of high interference resistance and high stability, is low in price and convenient to install and maintain, and has a very high practical value and a wide application prospect.

Description

technical field [0001] The invention belongs to the field of applied electronic technology, and relates to the application of sensor technology and digital electronic technology foundation, in particular to the application of HN911 pyroelectric infrared sensor module and 74LS192, 74LS47, 74LS08, 74LS86 and other small and medium-scale integrated circuits and digital tubes in classrooms. Design method of monitoring system. Background technique [0002] With the implementation of the "National Medium and Long-Term Educational Reform and Development Plan (2010--2020)", the enrollment scale of schools at all levels and types will continue to expand, and the number of people entering classrooms will continue to increase every day. The personnel situation in public learning places, the design and research of classroom population monitoring system have attracted people's attention. [0003] Chen Bingguo applied for a utility model invention patent for a distributed classroom popul...

Claims

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Application Information

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IPC IPC(8): G07C9/00
Inventor 吴勇灵
Owner 吴勇灵
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