Design of Portable Multi-point Temperature Control Cabinet Based on Single Chip Microcomputer

Abstract

Being widely used in various fields, temperature control cabinet has increasingly higher design requirements. However, single-point temperature measurement is commonly applied in temperature control cabinets now with relatively simple temperature detection, so the temperature measurement results are easily affected by environmental temperature. To meet the demand for precision temperature measurement, this paper not only introduces an 8-bit STC89C52 single-chip microcomputer with low power consumption and high performance as the core, but also adopts multi-point control temperature measurement mode. Bluetooth technology is combined with multi-relay self-switching to realize the overall temperature intelligent control of the temperature control cabinet with 0 to 99 ℃ as the temperature measurement range,  0.125 ℃ as the accuracy, and 100 ms as the refresh duration. The multi-point temperature measurement and control system designed independently in this paper features a simple structure, low cost, high precision, high stability, operability and portability, which can effectively meet the needs of precision temperature measurement of temperature control cabinets.