Public Place Hygiene Management System

Public spaces are an essential component of human society, and improving the quality of environmental hygiene in these areas is a matter of direct importance to the health of the general public. Therefore, it has become imperative to develop an automated management system for public space hygiene that integrates monitoring and supervision seamlessly. The convenient beach cleaning vehicle exemplifies how the hygiene management system can be tailored to suit the unique characteristics of public spaces. This comprehensive automated system consists of three key components: the central processing and control unit located within the hygiene supervision department; the distributed measurement and control units deployed directly at public space sites; and the communication network linking them all together. Since these distributed units are intelligent, autonomous devices operating across diverse regions, environments, locations, and distances, they inevitably raise challenges related to computer communication networks. And of course, computer communication relies heavily on reliable communication lines—or channels. However, establishing a dedicated private communication network within their jurisdiction would be neither economically viable nor technically feasible for hygiene supervision departments. Thus, leveraging the existing public network (such as the postal telecommunications network) as a relay transmission infrastructure emerges as the optimal solution. Not only does this approach significantly reduce the capital investment required to build the automated management system, but it also ensures robust technical maintenance and operational reliability for the equipment involved. At the heart of the public space hygiene automation system lies the host computer—typically an IBM PC—which serves as the system’s core component and central hub for both management and control. It not only oversees all administrative tasks within the hygiene supervision department but also coordinates the operations of the distributed units. Moreover, this central unit functions as the overarching oversight center for all public spaces, responsible for processing, analyzing, and managing all hygiene-related data collected from the field.

Due to I The data processing and management tasks for the IBM PC involve a heavy workload, while it also handles the constant communication with all extensions—creating a significant conflict between these two responsibilities. To resolve this issue, the front-end machine was specifically designed to take on part of the IBM PC's workload. This ensures that the computer has sufficient time to focus on its own tasks, enabling the entire system to operate reliably and efficiently. Meanwhile, the primary function of the MODEM is to facilitate long-distance multi-machine communication, while the automatic switching device enables seamless integration of telephone and computer communications over leased trunk lines, thereby enhancing the overall utilization of the trunk lines. As for the extension units, they are intelligent monitoring and control devices that combine on-site hygiene indicator testing, automatic alarms triggered when hygiene standards are exceeded, communication capabilities, and even display functions for computer clocks—all in one compact unit. When a hygiene indicator exceeds the acceptable threshold, the device automatically initiates an alarm—either at scheduled intervals or in real time—emitting audible or visual signals that clearly indicate the specific hygiene issue. This alerts onsite managers to promptly investigate the cause and implement corrective actions. Simultaneously, the MCS-51 microcontroller transmits the relevant data to the central processing and control unit, maintaining continuous monitoring until the hygiene indicators return to acceptable levels.

Information exchange (communication) between the CPU and peripherals or the computer can occur in two ways: polling and interrupts. Given the requirements for public place hygiene management and the characteristics of the system architecture, the interrupt method should be chosen. This approach not only enhances CPU efficiency and ensures the host has sufficient time to handle administrative tasks but also delivers relatively superior real-time responsiveness. When designing the peripheral program, in addition to adhering to the aforementioned basic principles, the primary consideration is the real-time response rate—hence, assembly language is employed. Once the peripheral unit is properly debugged on-site, there’s no need for it to perform complex, frequently recurring operations like the main unit does. Instead, most routine yet essential tasks on the peripheral are straightforward, achievable simply by appropriately configuring dedicated function keys tailored to specific transaction processes.