Multi-channel temperature control system

Abstract

The invention discloses a multi-channel temperature control system comprising a multi-channel temperature acquiring circuit, a multi-channel heating circuit, an SPI bus, a data bus and a micro controller circuit. The SPI bus is connected to the multi-channel temperature acquiring circuit and performs information transmission and control on the same; the micro controller circuit is connected to the multi-channel heating circuit through the data bus and performs information transmission and control on the multi-channel heating circuit. The system adopts a high-speed MCU and the SPI bus technology, the temperature reading speed is high, the accuracy is high, the control algorithm is burnt in the MCU, the requirements of gas chromatograph multi-channel temperature control are met, the multi-channel temperature control is performed independently, the target values of the multi-channel temperature control are input, the system operates automatically according to set target values to control the temperature automatically, the complexity of an existing design scheme or method is further avoided, the system is simplified in design, cost is lower, and the installation and maintenance are more convenient.

Description

technical field [0001] The invention relates to the field of chromatographic detection instruments, in particular to a multi-channel temperature control of a gas chromatograph. Background technique [0002] There are many ways to realize the temperature control system of the gas chromatograph. In the early design of the outsourced temperature controller module, the outsourced temperature controller is installed in each required control part of the instrument to realize the injection port, detector, and column oven. temperature control. With the development of science and technology and the popularization of single-chip technology, the temperature control of the injection port, the temperature control of the detector, the temperature control of the column oven, etc., all realize the single-chip microcomputer and AD acquisition, solid-state relay circuit and control algorithm to form a closed loop to realize temperature control. At present, the main temperature control in the...

AI Technical Summary

Problems solved by technology

At present, the main temperature control in the market mainly satisfies the three-way temperature control. There has not yet been a multi-way temperature control demand that needs to be solved, and there has not yet been a corresponding multi-way temperature control system or device. If the current involved method or method is used, additional Control circuit unit, which will inevitably increase the complexity of the design scheme and higher cost, and the installation and maintenance will be more complicated. Therefore, it is necessary to avoid the complexity of the original design scheme or method in the case of adding more temperature control channels. Resilience, making it easier to design, lower cost and easier to install and maintain

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