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High-precision temperature control system

A temperature control system, high-precision technology, applied in the direction of control/regulation system, temperature control, non-electric variable control, etc., can solve problems that are difficult to realize, achieve reduced deviation, good temperature control effect, and improve temperature control accuracy Effect

Inactive Publication Date: 2016-07-27
CHENGDU YICHUANGSI BIOLOGICAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the current military, industrial and commercial, temperature control is the most common and common application, but in places where the temperature control accuracy is not high, most of the final stages are controlled by relays, which are realized by the pull-in of the relays. The control accuracy is within the range of ±10°C. Even with the development of the single-chip microcomputer, the PID adjustment will only do some processing on the previous part of the amplification part, and the final stage is still realized by the relay, but the temperature control accuracy has been improved. Generally within the range of ±0.1°C~±5°C, which is difficult to achieve in some aspects that require high temperature; with the development of military and industry, there are further requirements for the debugging environment of many high-end products , the ambient temperature changes very little, including ±1°C, ±0.5°C, ±0.3°C, ±0.2°C, ±0.1°C, etc., and some even have higher requirements, and relying on relays to achieve temperature control is far from meeting the requirements

Method used

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  • High-precision temperature control system

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Embodiment 1

[0013] The system block diagram of this embodiment is as follows figure 1 As shown, it includes a closed-loop control main loop composed of a temperature control system, a heating system, a temperature measurement link, a temperature-to-electricity conversion link, a current amplification link, and a current drive link; the temperature control system uses a platinum thermal resistance to control the temperature Setting; the temperature measurement link uses a platinum thermal resistance to measure the temperature.

[0014] Through the adjustment of the temperature control system, the control temperature point can be set, the temperature control system controls the power of the heating system according to the set control temperature point, the temperature measurement link measures the temperature of the heated object after heating, through the temperature-electric conversion The link converts the measured temperature into a current signal. After the current amplification link, ...

Embodiment 2

[0016] This embodiment is further optimized on the basis of the above embodiments. Further, the system also includes an external temperature system and a fine-tuning system. The external temperature system and the temperature control system jointly drive the fine-tuning system, and the fine-tuning system is connected to the current amplification link. , forming a closed-loop control fine-tuning circuit; the external temperature system uses a platinum thermal resistance to measure the external temperature. The other parts of this embodiment are the same as those of the foregoing embodiments, and thus will not be repeated here.

[0017] Since the change of the external environment temperature may cause the deviation of the control temperature point, an external temperature system for measuring the temperature of the heated environment is added. Through the calculation of the fine-tuning system, the processed deviation signal is added to the current amplification link, and then pa...

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Abstract

The invention discloses a high-precision temperature control system, which includes a closed-loop control main loop composed of a temperature control system, a heating system, a temperature measurement link, a temperature-to-electricity conversion link, a current amplification link, and a current drive link in sequence; The temperature control system uses a platinum thermal resistance to set the temperature; the temperature measurement link uses a platinum thermal resistance to measure the temperature. The present invention adopts platinum thermal resistance with high stability as the temperature control and temperature measuring element, sets two closed-loop control loops, and improves the temperature control accuracy, especially the addition of the unique closed-loop control fine-tuning loop, which can reduce the temperature caused by the external environment. The deviation of the control temperature point caused by the temperature change achieves a good temperature control effect.

Description

technical field [0001] The invention relates to the field of temperature control, in particular to a high-precision temperature control system. Background technique [0002] In the current military, industrial and commercial, temperature control is the most common and common application, but in places where the temperature control accuracy is not high, most of the final stages are controlled by relays, which are realized by the pull-in of relays. The control accuracy is within the range of ±10°C. Even with the development of the single-chip microcomputer, the PID adjustment is only to do some processing on the previous part of the amplification part, and the final stage is still realized by the relay, but the temperature control accuracy has been improved. Generally within the range of ±0.1°C~±5°C, which is difficult to achieve in some aspects that require high temperature; with the development of military and industry, there are further requirements for the debugging enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/24
CPCG05D23/24
Inventor 周洁
Owner CHENGDU YICHUANGSI BIOLOGICAL SCI & TECH