Painting shop temperature and humidity decoupling time lag control system
A temperature and humidity control and workshop technology, applied in the direction of control/regulation system, simultaneous control of multiple variables, non-electric variable control, etc., to achieve the effect of improving the coating process level, simple operation, and improving the quality of the paint film
Inactive Publication Date: 2012-04-25
HUAZHONG UNIV OF SCI & TECH
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[0004] The purpose of the present invention is to provide an effective, stable and high-precision temperature and humidity control system for painting workshops, which can solve the problems caused by temperature and humidity coupling and large time-delay control
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[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0023] Such as Figure 1-2 As shown, the control system of the present invention includes a signal acquisition and input part, a display part, a control part and an execution part.
[0024] The signal acquisition input part is composed of temperature and humidity sensors and A / D converters, including the detection of environmental factors such as temperature and humidity, and converts the signals collected by the system in real time into digital and analog quantities that can be recognized by computers and operators.
[0025] The control part is composed of PLC and temperature-humidity decoupling time-delay controller. PLC receives data from temperature and humidity sensors, calculates temperature and humidity deviations e1 and e2, and uses them as the input of temperature-humidity decoupling time-delay controller to complete the reasoning of the controller ...
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The invention discloses a painting shop temperature and humidity decoupling time lag control system. The system comprises a signal collecting and inputting part, a control part and an executing part, wherein the signal collecting and inputting part is used for respectively collecting temperature and humidity data in a painting shop and inputting the collected temperature and humidity data into the control part after being converted by an A / D (Analogue-to-Digital) converter; and the control part is used for inputting a temperature error e1 and a humidity error e2 into a temperature and humidity decoupling time lag controller when differences between preset temperature and humidity values and the current temperature and humidity values respectively exceed corresponding thresholds, carrying out decoupling time slag control on the temperature error e1 and the humidity error e2 to generate temperature and humidity control quantity U01 and U02 and inputting the temperature and humidity control quantity U01 and U02 into the executing part to realize environment control of the painting shop. According to the invention, the temperature and humidity of the automobile painting shop can be effectively and stably controlled with high accuracy; the paint film quality of the vehicle body can be improved; the stability of the paint film quality can be improved; the repair rate can be reduced; and the level of the automobile manufacturing enterprise painting process can be integrally increased.
Description
technical field [0001] The invention relates to the field of environmental parameter control of an automobile painting workshop, in particular to a temperature and humidity decoupling time-delay control system for a painting workshop. Background technique [0002] Automobile painting is one of the important processes in the production of automobile body. The quality of the paint film not only affects the overall appearance of the automobile body, but also mainly reflects the level of painting technology of automobile manufacturers. With the rapid development of my country's automobile industry and increasingly fierce competition, improving the paint film quality of the car body, increasing the stability of the paint film quality, and reducing the repair rate have become one of the key research topics of various enterprises. The painting process has high requirements on the temperature, humidity and other environmental parameters inside the workshop. If the environment is out...
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Inventor 邵新宇喻道远乐胜年龚文明张三强舒彪王灯林文文于岚旭姜昕亚
Owner HUAZHONG UNIV OF SCI & TECH