Programmable logic controller (PLC)-based temperature and liquid level combined monitoring system
A monitoring system and liquid level technology, applied in the field of monitoring systems, can solve problems such as many programs, many processing steps, and complicated operations, and achieve the effects of stable and reliable performance, improved cost performance, and reduced economic costs.
Inactive Publication Date: 2014-01-22
解波
View PDF5 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, when measuring the liquid level and temperature in the blending tank, the measurement and control are carried out separately. The operation is relatively complicated, with many procedures and processing steps.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] Such as figure 1 As shown, a PLC-based temperature and liquid level joint monitoring system includes a digital switch 10 of the blending tank, an electric heater 9 and an agitator 8 arranged in the blending tank, and a regulating valve 4 and A frequency converter 5, a temperature transmitter 7 and a liquid level transmitter 6 are arranged in the blending tank, and the output ends of the temperature transmitter 7 and the liquid level transmitter 6 are connected to the input end of the PLC controller 1 , the output end of the PLC controller 1 is respectively connected with the digital switch 10, the electric heater 9, the agitator 8, the regulating valve 4 and the frequency converter 5; the PLC controller 1 is interactively connected with the industrial computer 2 and the touch screen3.
[0015] Described PLC controller 1 comprises central processing unit 1-1, and the input terminal of described central processing unit 1-1 is connected with analog input module 1-3, digit...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a programmable logic controller (PLC)-based temperature and liquid level combined monitoring system. The PLC-based temperature and liquid level combined monitoring system comprises a digital switch of a mixing tank, an electric heater, a stirrer, an adjusting valve and a frequency converter, wherein the electric heater and the stirrer are arranged in the mixing tank; the adjusting valve and the frequency converter are used for controlling water intake of a positive displacement pump; a temperature transmitter and a liquid level transmitter are arranged in the mixing tank; the output ends of the temperature transmitter and the liquid level transmitter are connected with the input end of the PLC; the output end of the PLC is connected with the digital switch, the electric heater, the stirrer, the adjusting valve and the frequency converter respectively; the PLC is in interactive connection with an industrial personal computer. The PLC-based temperature and liquid level combined monitoring system combines temperature monitoring with liquid level monitoring to perform combined monitoring, acquires the liquid level and the temperature of water in the mixing tank in a real-time manner so as to adjust temperature and water intake and finally control start and stop of components, and has the advantages of reducing programs and improving efficiency.
Description
technical field [0001] The invention relates to a monitoring system, in particular to a PLC-based combined temperature and liquid level monitoring system. Background technique [0002] In the process of industrial processing and production, it is inevitable to monitor the temperature of the material and the liquid level in the tank. For example, in the process of beverage processing, it is necessary to measure the liquid level of the water in the blending tank at any time, compare it with the set liquid level value, and then output the analog signal through the PID controller to linearly control the frequency of the displacement pump inverter to control the water injected into the blending tank The flow rate can precisely control the liquid level of the water in the mixing tank. At the same time, it is necessary to measure the water temperature in the blending tank in real time, compare it with the set temperature value, use the temperature error value to control the start ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G05D27/02
Inventor 解波
Owner 解波