A kind of internet-of-things terminal based on GPRS is applied to wastewater treatment supervisory system
Technical field
The utility model relates to wastewater treatment monitoring field, is specially a kind of internet-of-things terminal based on GPRS and is applied to wastewater treatment supervisory system.
Background technology
In traditional wastewater process industry, there is monitoring node dispersion always, cable network data transmits limited wastewater treatment as industrial additional industry, for improving productivity effect, reduce engineering cost, realize remote monitoring, few people even no supervision have great importance, network coverage is wider, network connects GPRS technology more easily and is applied to wastewater treatment supervisory system, merge mutually with the sensor of industry spot, fundamentally solve original problem, realize the remote real-time monitoring of industry spot.
In sewage treatment process, need to arrange a large amount of data acquisition nodes, as liquid level, pH value, conductivity, oxygen level etc., although field bus technique solves, wiring is simple, high speed communication, the problem such as easy to maintenance, and signal transmission distance is limited after all.For sewage treatment plant, there is the field apparatuss such as large quantity sensor, controller, they are usually quite scattered is distributed in larger scope, the control bottom-layer network be made up of them, the control information amount of individual node is little, the task of information transmission is comparatively simple, but higher to the real-time of its transmission information, rapidity requirement.Again because the pond volume of wastewater treatment is all comparatively huge, more cause data collection point relative distribution, distance, be not easy to centralized management.
Summary of the invention
The purpose of this utility model is to provide a kind of internet-of-things terminal based on GPRS to be applied to wastewater treatment supervisory system, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme: a kind of internet-of-things terminal based on GPRS is applied to wastewater treatment supervisory system, comprise: terminal resistance one, described terminal resistance one is connected with PLC master station, described PLC master station is connected with frequency converter, described frequency converter is connected with motor and remote output devices respectively, described remote output devices and remote input equipment connection, described remote input equipment and long-range A/D model calling.
Preferably, described long-range A/D module is connected with PLC slave station, described PLC slave station is connected with the touch screen human-computer interface interface of terminal resistance two and HMI respectively, and described PLC slave station is by wireless network transmissions to DTU, and described DTU is connected with ipc monitor by GPRS.
Preferably, the touch screen human-computer interface of described Monitor Computer Control System and described HMI forms SCADA system, described SCADA system and data acquisition and supervisor control.
Preferably, described PLC master station, described frequency converter, described remote input equipment, described remote output devices, described long-range A/D module and described PLC slave station form the CC-Link fieldbus control network of wastewater treatment.
Preferably, described long-range A/D module is digital-to-analog signal converter, and described DTU is data transmission unit.
Compared with prior art, the beneficial effects of the utility model are: (1) each field intelligent device, respectively as a network node, realizes information transmission between each node, between on-the-spot node and host computer and communication by fieldbus.Upwards transmit information realization resource sharing, centralized management, expand magnitude control, decentralised control to downward-extension, complete the synthesis automation function of various complexity.(2) CC-Link field bus technique has saving distribution, realizes high-speed communication, makes system more have the feature of dirigibility.There is abundant function simultaneously: simple system configuration function, automatic refresh function, abundant RAS function, reservation station function, master function for subsequent use, substation detachment function, automatic wire charging function, monitoring function etc.(3) network technology is applied to control system by CC-Link fieldbus networks, greatly improve dirigibility and the reliability of control system, the integration of control system and harmony (4) native system can be realized for having a very wide distribution, the sewage treatment control system of layout complexity proposes a kind of method preferably, equipment and the GPRS wireless communication techniques such as application Mitsubishi Q series of PLC, construct the internet-of-things terminal wastewater treatment network control system based on GPRS, achieve wireless remote multi-stage monitoring, this system in actual applications can normal operation, stable performance, reliably, monitoring interface is friendly directly perceived, easy and simple to handle, the application of this wireless sensor network, automatic control system is made more to have practicality and dirigibility.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1, PLC master station, 2, frequency converter, 3, remote output devices, 4, remote input equipment, 5, long-range A/D module, 6, PLC slave station, 7, the touch screen human-computer interface of HMI, 8, DTU, 9, ipc monitor, 10, terminal resistance one, 11, terminal resistance two, 12, motor.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1, the utility model provides a kind of technical scheme: a kind of internet-of-things terminal based on GPRS is applied to wastewater treatment supervisory system, comprise: terminal resistance 1, terminal resistance 1 is connected with PLC master station 1, PLC master station 1 is connected with frequency converter 2, frequency converter 2 is connected with motor 12 and remote output devices 3 respectively, remote output devices 3 is connected with remote input equipment 4, remote input equipment 4 is connected with long-range A/D module 5, long-range A/D module 5 is connected with PLC slave station 6, PLC slave station 6 is connected with touch screen human-computer interface 7 interface of terminal resistance 2 11 and HMI respectively, PLC slave station 6 by wireless network transmissions to DTU8, DTU8 is connected with ipc monitor 9 by GPRS, the touch screen human-computer interface 7 of ipc monitor 9 system and HMI forms SCADA system, SCADA system and data acquisition and supervisor control, PLC master station 1, frequency converter 2, remote input equipment 3, remote output devices 4, long-range A/D module 5 and PLC slave station 6 form the CC-Link fieldbus control network of wastewater treatment, long-range A/D module 5 is digital-to-analog signal converter, DTU8 is data transmission unit.
Principle of work: touch screen human-computer interface 7 interface RS-422 built-in interface being connected HMI, realize industrial field control, expansion interface is connected with DTU8.DTU8 full name is data transmission unit, be used for specially serial data being converted to IP data or IP data being converted to serial data, the wireless terminal device transmitted is carried out by cordless communication network, DTU8 is first registered to the GPRS network of movement after powering on and running, then set up SOCKET with center, backstage to be connected, center, backstage is the client that SOCKET connects as the service end DTU8 of SOCKET, upon establishment of a connection, bidirectional wireless data transmission just can be carried out by DTU8 in the field apparatus of front end and center, backstage, thus realize Wireless remote control and the supervision of this system.
Although illustrate and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and spirit, scope of the present utility model is by claims and equivalents thereof.