Design And Implementation Of Signal Acquisition System Of Temperature And Humidity

In recent years, along with the automation program is more and more high, more and more extensive application of signal acquisition managem--ent system, especially the application of increasing temperature and humi--dity automatic control management system, such as the greenhouse culti--vation of application, biological laboratory temperature and humidity detection, but in our country the main signal collecting management system and the temperature and humidity automatic control system in a comparison of the blank state, therefore, has an important significance in signal acquisition management system research on how to develop an advanced, secure, cross platform, high efficiency.Paper introduces the system development background and the domest--ic and foreign signal acquisition system management and monitor system of temperature and humidity, and signal management system business req--uirements to do the analysis, elaborated the system needs to solve the problem. Designed by the temperature and humidity control system datab--ase, and uses C/S architecture, combining with the Labview software and the SQL Server 2005 software, developed a suitable temperature and hum--idity signal management system. The system signal acquisition system based on AT89C52 microcontroller as the core temperature control sys--tem. Temperature and humidity sensor using DS18B20, using HM150--0 sensor, directly output digital signal, then the temperature and hum--idity transfer to the microcontroller, microcontroller 485 through the bus transfer to the client, each client and then transmit the information to the server. This system embarks from the server and client two kinds of users, the formulation of the query management, temperature and hum--idity control management, alarm management, rights management, help information. The query management client canquery the near section time of the regional temperature and humidity, and can print out the form, the server query management can query thein form ation of various regions of temperature and humidity; alarm management main--ly when the temperature and humidity imbalance situation to give the user an alarm information, in order to reduce the loss of the user; temperature and humidity control management is divided into manual and automatic control, users can set up their own optimum temperature and humidity, and then through the control extension of computer automatic control(this is a relatively slow process), can also through the computer direct manua--l control, the full realization of human machine combination; privilege management is divided into administrator privileges and general user permissions, administrators can set the username and password, and users can for access; help management can more effectively realize humanize--d system settings.The design and implementation of signal management system has run successfully reached the expected target. The development and application of the system reflects the development direction of automation and in form atization of the signal management technology, improve the efficiency of the management staff and management level, make the school manage--ment more efficient, more systematic and scientific.