Registration mechanism-based multi-point temperature measurement control system

Abstract

The invention discloses a registration mechanism-based multi-point temperature measurement control system. An ARM (Advanced RISC Machine) chip is taken as a processing core, a temperature sensor ID registration mechanism is introduced through communication with an upper computer, and when sensor nodes are replaced and added or deleted, only sensor IDs need to be operated in the upper computer or a registration circuit. The multi-point temperature measurement control system can register or deregister the sensor IDs in the upper computer or the registration circuit according to users' demands to control number of temperature measurement points so as to reasonably utilize resources; and meanwhile, sensors can be timely and quickly replaced in the presence of faults, added or deleted through the registration mechanism without program re-curing, so that great conveniences are provided for practical system maintenance and management.

Description

technical field [0001] The invention relates to the field of single-bus temperature sensor multi-point temperature measurement control system, especially designs a single-bus temperature sensor multi-point temperature measurement control system based on registration mechanism, which is convenient for management and maintenance. Background technique [0002] The single-bus temperature sensor multi-point temperature measurement and control system plays an important role in both the industrial manufacturing field and the life field. Compared with the traditional analog signal long-distance temperature measurement system, this system avoids technical problems such as lead wire error compensation, multi-point measurement switching error, and zero-point drift error of the amplifying circuit. For example, the digital single-bus temperature sensor DS18B20 with strong anti-interference ability has relatively low cost, small size and high precision. It can directly encode the temperat...

AI Technical Summary

Problems solved by technology

[0005] 1. With single-chip microcomputer as the processing core, each I / O port is connected to a DS18B20. Although the sampling data is faster, it takes up a lot of I / O port resources and the scalability is not good;

[0006] 2. Take the single-chip microcomputer as the processing core, and use the form of toggle switch code to select the corresponding sensor on the single bus to work. The hardware circuit design of this design scheme is relatively complicated, and the manual control is far from meeting the requirements of intelligent control, and the scalability is limited by the hardware. resource constraints;

However, when replacing a new sensor or adding a new temperature measurement point, this type of system needs to re-cure the program, that is, reprogram the single-chip microcomputer or re-write the external memory, which is extremely inconvenient to maintain and cannot meet the requirements of real-time control.

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