PH value monitoring device and method based on CAN bus network gate

Abstract

The invention discloses a pH value measurement and control device based on a CAN bus gateway and a measurement and control method thereof. A remote monitoring computer visits the embedded type Web server of an embedded type CAN bus gateway by IE browser; the embedded type CAN bus gateway visits the pH measurement and control device by a CAN bus and requests real time data detected by the pH measurement and control device; the requested data are returned and sent to the CAN bus gateway by the CAN bus and are transmitted to the IE browser of the remote monitoring computer so as to display through a Ethernet by the web page of the Web server of the embedded type CAN bus gateway; at the same time, the remote monitoring computer displays page by IE browser and sends a control instruction to the pH measurement and control device through an Ethernet communication port, the embedded type CAN bus gateway and the CAN bus in regular turn so as to control the action of an electromagnetic valve and adjust the pH value of a detecting object. A production field infranet and an enterprise information network are interconnected by the method, which can effectively improve production efficiency, intellectualized monitoring level and the network management level of the enterprise.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a network-type intelligent parameter measurement and control device that integrates pH value measurement control and communication functions by utilizing embedded system, electronics, control, computer, digital communication, and network technologies. The device is mainly used in biological fermentation engineering, water environment monitoring and aquaculture and other fields. Background technique [0002] Commonly used pH value measurement and control devices include pH value measurement and control sensors, signal conditioning circuits and analog-to-digital A / D conversion modules sequentially connected to the microprocessor, and solenoid valves are used as actuators to connect with the microprocessor through digital-to-analog D / A conversion modules , the microprocessor sends the pH value signal detected by the sensor to the solenoid valve output by the acid or alkali solution ...

AI Technical Summary

Problems solved by technology

However, the CAN bus also has limitations. As the bottom network of the factory, the CAN bus is incompatible with Ethernet, whether it is the upper layer protocol or the electrical interface, thus separating the enterprise information network from the industrial field bottom network. It is impossible to directly collect and monitor the data information of the industrial production site, so how to interconnect the enterprise information network and the industrial control network has attracted much attention from enterprises

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