CN203689090U

CN203689090U - PLC fuzzy adaptive seawater salinity test device

Info

Publication number: CN203689090U
Application number: CN201420053030.4U
Authority: CN
Inventors: 陈伟; 邢梅香
Original assignee: Luoyang Institute of Science and Technology
Current assignee: Luoyang Institute of Science and Technology
Priority date: 2014-01-27
Filing date: 2014-01-27
Publication date: 2014-07-02
Anticipated expiration: 2024-01-27

Abstract

The utility model provides a PLC fuzzy adaptive seawater salinity test device and belongs to the PLC fuzzy self-adaptive control field. The test device is composed of a seawater salinity test platform and a PLC salinity control system. The seawater salinity test platform comprises a test box, a mother liquor tank and a recovery tank. The mother liquor tank conveys seawater to the test box through a seawater input pipe. The seawater test solution in the test box is conveyed to the recovery tank through a recovery pipe. The recovery tank is connected with a water output pipe. A PLC control unit in the PLC salinity control system carries out turn-on and turn-off control to different solenoid valves in the seawater salinity test platform adaptively through an I/O driving circuit interface module according to the tested liquid levels and salinity information in the test box, the mother liquor tank and the recovery tank, and therefore adaptive control of liquid level and salinity of the seawater test solution in the test box is achieved finally. The test device can achieve seawater salinity multi-point adaptive control conveniently according to different requirements of the seawater salinity test.

Description

A kind of PLC fuzzy self-adaption seawater salinity test unit

Technical field

The utility model belongs to PLC fuzzy self-adaption control field, is specifically related to a kind of seawater salinity test unit based on the control of PLC fuzzy self-adaption.

Background technology

Seawater is a kind of electrolyte solution that contains multiple salt, and the sodium chloride taking 3%～3.5% is main salt, and wherein chloride ion content is very large, and high salinity, the sand cut of seawater and the feature that is conventionally dissolved with air make seawater have severe corrosive to metal.In the protective coating technology of hardware and the research of Seawate-corrosive-resisting steel, conventionally to make hardware carry out corrosion test under different seawater salinity conditions, because concentration of seawater control is without fixing mathematical model and have dynamic, there is intrinsic time delay in salinity sensor simultaneously, and conventional automaton often can not meet the requirement to the control of testing liquid salinity.

Utility model content

The purpose of this utility model is to provide a kind of seawater salinity test unit based on PLC adaptive control, the utility model can be according to the different requirements of seawater salinity test, realize easily the adaptive control of seawater salinity multiple spot, adaptability test condition being changed to improve seawater salinity test unit.

To achieve these goals, the technical solution of the utility model is: a kind of PLC fuzzy self-adaption seawater salinity test unit, this test unit is by seawater salinity test platform and PLC salinity composition of the control system, described seawater salinity test platform comprises chamber, mother liquor tank and accumulator tank, mother liquor tank is delivered to seawater in chamber by seawater intake line, seawater testing liquid in chamber is delivered to accumulator tank by reclaim line, recovery liquid in accumulator tank route seawater circulation line after outlet pipeline flows out is delivered to mother liquor tank, another road emits through discharge pipe, described seawater intake line, reclaim line, on seawater circulation line and discharge pipe, be respectively equipped with salt water solenoid valve, water-drainage solenoid valve, seawater recovery pump and discharge solenoid valve, in described chamber, be connected with freshwater input pipeline, on freshwater input pipeline, be provided with fresh water solenoid valve, in chamber, be also provided with seawater testing liquid closed circuit, on seawater testing liquid closed circuit, be provided with sea water circulating pump,

Described PLC salinity control system comprises industrial computer, PLC control module, I/O drive interface module, sensor interface module, salinity sensor and liquid level sensor, industrial computer is the host computer of described test unit, and carry out data communication with PLC control module, salinity sensor and liquid level sensor are for detection of chamber, salinity in mother liquor tank and accumulator tank and liquid level information, the signal output part of salinity sensor and liquid level sensor is connected with the signal input part of sensor interface module, the signal output part of sensor interface module is connected with the analog input port of PLC control module, the I/O control port of PLC control module is connected with the I/O control inputs port of I/O drive interface module, the I/O control output end mouth of I/O drive interface module (20) respectively with sea water circulating pump, seawater recovery pump, fresh water solenoid valve, salt water solenoid valve, the drive end of water-drainage solenoid valve and discharge solenoid valve is connected.

Beneficial effect: the utility model can be according to the different requirements of seawater testing liquid, salinity to seawater testing liquid and liquid level are carried out self-adaptation adjusting, realize easily the adaptive control of seawater salinity multiple spot, improve the adaptability that seawater salinity test unit changes test condition, and can obtain high seawater testing liquid precision preparation and shorter preparation time.

Brief description of the drawings

Fig. 1 is one-piece construction graph of a relation of the present utility model;

Fig. 2 is the pipeline schematic diagram of the utility model seawater salinity test unit;

Fig. 3 is the circuit diagram of the utility model PLC salinity control system;

Fig. 4 is the circuit diagram of the utility model I/O drive interface module;

In figure, be labeled as: 1, chamber, 2, mother liquor tank, 3, accumulator tank, 4, sea water circulating pump, 5, seawater recovery pump, 6, fresh water solenoid valve, 7, salt water solenoid valve, 8, water-drainage solenoid valve, 9, discharge solenoid valve, 10, PLC control module, 11, industrial computer, 12, salinity sensor I, 13, liquid level sensor I, 14, salinity sensor II, 15, liquid level sensor II, 16, salinity sensor III, 17, liquid level sensor III, 18, sensor interface module I, 19, sensor interface module II, 20, I/O drive interface module.

Embodiment

As depicted in figs. 1 and 2, a kind of PLC fuzzy self-adaption seawater salinity test unit, this test unit is by seawater salinity test platform and PLC salinity composition of the control system, described seawater salinity test platform comprises chamber 1, mother liquor tank 2 and accumulator tank 3, mother liquor tank 2 is delivered to seawater in chamber 1 by seawater intake line, seawater testing liquid in chamber 1 is delivered to accumulator tank 3 by reclaim line, recovery liquid in accumulator tank 3 route seawater circulation line after outlet pipeline flows out is delivered to mother liquor tank 2, another road emits through discharge pipe, described seawater intake line, reclaim line, on seawater circulation line and discharge pipe, be respectively equipped with salt water solenoid valve 7, water-drainage solenoid valve 8, seawater recovery pump 5 and discharge solenoid valve 9, in described chamber 1, be connected with freshwater input pipeline, on freshwater input pipeline, be provided with fresh water solenoid valve 6, in chamber 1, be also provided with seawater testing liquid closed circuit, on seawater testing liquid closed circuit, be provided with sea water circulating pump 4.

Wherein, chamber 1 is for simulating the seawater experimental enviroment under different salinity, mother liquor tank 2 provides the seawater mother liquor of high salinity for the preparation of the interior different salinity seawater of chamber 1, accumulator tank 3 is for reclaiming, the seawater testing liquid that interim storage chamber 1 is discharged, sea water circulating pump 4 is for the even mixing of the interior salinity process for preparation of chamber 1 seawater testing liquid, seawater recovery pump 5 is for reclaiming in accumulator tank 3 compared with the seawater testing liquid of high salinity, fresh water solenoid valve 6, salt water solenoid valve 7 and water-drainage solenoid valve 8 are for salinity and the volume of Control experiment case 1 maritime interior waters testing liquid, discharge solenoid valve 9 is for discharging the Low-salinity seawater testing liquid in accumulator tank 3.

Described PLC salinity control system comprises industrial computer 11, PLC control module 10, I/O drive interface module 20, sensor interface module, salinity sensor and liquid level sensor, the host computer that industrial computer 11 is described test unit, and carry out data communication with PLC control module 10, salinity sensor and liquid level sensor are for detection of chamber 1, salinity in mother liquor tank 2 and accumulator tank 3 and liquid level information, the signal output part of salinity sensor and liquid level sensor is connected with the signal input part of sensor interface module, the signal output part of sensor interface module is connected with the analog input port of PLC control module 10, the I/O control port of PLC control module 10 is connected with the I/O control inputs port of I/O drive interface module 20, the I/O control output end mouth of I/O drive interface module 20 respectively with sea water circulating pump 4, seawater recovery pump 5, fresh water solenoid valve 6, salt water solenoid valve 7, water-drainage solenoid valve 8 is connected with the drive end of discharge solenoid valve 9.Wherein, salinity and liquid level signal in the chamber collecting 1, mother liquor tank 2 and accumulator tank 3 are passed to sensor interface module by salinity sensor and liquid level sensor, the salinity receiving and liquid level signal are passed to PLC control module 10 by sensor interface module, and PLC control module 10 is realized on off control to sea water circulating pump 4 and seawater recovery pump 5 and the break-make control of fresh water solenoid valve 6, salt water solenoid valve 7, water-drainage solenoid valve 8 and discharge solenoid valve 9 by I/O drive interface module 20.

Wherein, described salinity sensor comprises salinity sensor I 12, salinity sensor II 14 and salinity sensor III 16, and described liquid level sensor comprises liquid level sensor I 13, liquid level sensor II 15 and liquid level sensor III 17.Salinity sensor I 12 and liquid level sensor I 13 are arranged on respectively chamber 1 inside and top, for salinity and the liquid level of chamber 1 maritime interior waters testing liquid are detected, salinity sensor II 14 and liquid level sensor II 15 are arranged on respectively mother liquor tank 2 inside and mother liquor tank 2 tops, for salinity and the liquid level of mother liquor tank 2 maritime interior waters mother liquors are detected, salinity sensor III 16 and liquid level sensor III 17 are arranged on respectively the top of accumulator tank 3 inside and accumulator tank 3, for seawater salinity and the liquid level of accumulator tank 3 interior discharges are detected.

Described sensor interface module comprises sensor interface module I 18 and sensor interface module II 19.

The 4-20mA signal output part of salinity sensor I 12, the 4-20mA signal output part of liquid level sensor I 13 are connected with the corresponding 4-20mA signal input part of sensor interface module I 18 respectively; The 4-20mA signal output part of salinity sensor II 14, the 4-20mA signal output part of liquid level sensor II 15 are connected with the corresponding 4-20mA signal input part of sensor interface module I 18 respectively; The 4-20mA signal output part of salinity sensor III 16, the 4-20mA signal output part of liquid level sensor III 17 are connected with the corresponding 4-20mA signal input part of sensor interface module II 19 respectively; 4-20mA signal output part, the sensor interface module II 194-20mA signal output part of sensor interface module I 18 are connected with the corresponding analog input port of PLC control module 10 respectively.

The 220V power interface of PLC control module 10 is connected with the 220V power output interface of 220V power supply 1 module respectively; The 220V power interface of I/O drive interface module 20 is connected with the 220V power output interface of 220V power supply 2 modules respectively, and the 24V power interface of I/O drive interface module 20 is connected with the 24V power output interface of 24V power module respectively; The I/O control port of PLC control module 10 is connected with the corresponding I/O control inputs port of I/O drive interface module 20; The I/O control output end mouth of I/O drive interface module 20 is connected with the I/O control inputs port of fresh water solenoid valve 6, salt water solenoid valve 7, water-drainage solenoid valve 8, discharge solenoid valve 9, sea water circulating pump 4, seawater recovery pump 5 respectively; PLC control module 10 is realized the break-make control of on off control to sea water circulating pump 4, fresh water solenoid valve 6, salt water solenoid valve 7, water-drainage solenoid valve 8 by I/O drive interface module 20, to realize the self-adaptation preparation at the interior different salinity seawater of chamber 1 testing liquid of mother liquor tank 2 high salinity seawater mother liquors and tap water.

As shown in Figure 3, the host computer of PLC salinity control system taking industrial computer 11 as seawater salinity test unit; PLC control module 10 is the field control unit of seawater salinity test unit; On industrial computer 11, adopt the monitoring software of design of Configuration Software seawater salinity test unit, the RS232 communication interface of industrial computer 11 is connected with the RS485 communication interface of PLC control module 10, realizes the data communication between PLC control module 10 and industrial computer 11; PLC control module 10 utilizes the control strategy such as fuzzy control, switch control to form fuzzy self-adaption seawater salinity control program module, realizes the Adaptive Fuzzy Control of seawater salinity, builds a seawater salinity fuzzy self-adaption control platform.Wherein: the 4-20mA signal output part A1, the B1 that are arranged on the salinity sensor I 12 of chamber 1 inside are connected with 4-20mA signal input part A1, the B1 of sensor interface module I 18 respectively; The 4-20mA signal output part A2, the B2 that are arranged on the liquid level sensor I 13 on chamber 1 top are connected with 4-20mA signal input part A2, the B2 of sensor interface module I 18 respectively; 4-20mA signal output part A1, the B1 of sensor interface module I 18 is connected with analog input port A1, B1 and A2, the B2 of PLC control module 10 respectively with 4-20mA signal output part A2, B2; The 4-20mA signal output part A3, the B3 that are arranged on the salinity sensor II 14 of mother liquor tank 2 inside are connected with 4-20mA signal input part A3, the B3 of sensor interface module I 18 respectively; The 4-20mA signal output part A4, the B4 that are arranged on the liquid level sensor II 15 on mother liquor tank 2 tops are connected with 4-20mA signal input part A4, the B4 of sensor interface module I 18 respectively; 4-20mA signal output part A3, the B3 of sensor interface module I 18 is connected with analog input port A3, B3 and A4, the B4 of PLC control module 10 respectively with 4-20mA signal output part A4, B4; The 4-20mA signal output part A5, the B5 that are arranged on the salinity sensor III 16 of accumulator tank 3 inside are connected with 4-20mA signal input part A5, the B5 of sensor interface module II 19 respectively; The 4-20mA signal output part A6, the B6 that are arranged on the liquid level sensor III 17 on accumulator tank 3 tops are connected with 4-20mA signal input part A6, the B6 of sensor interface module II 19 respectively; 4-20mA signal output part A5, the B5 of sensor interface module II 19 is connected with analog input port A5, B5 and A6, the B6 of PLC control module 10 respectively with 4-20mA signal output part A6, B6; The I/O control port Q0.0 of PLC control module 10, Q0.1, Q0.2, Q0.3, Q0.4, Q0.5 are connected with I/O control inputs port Q0.0, Q0.1, Q0.2, Q0.3, Q0.4, the Q0.5 of I/O drive interface module 20 respectively; The earth terminal M of the I/O control port of PLC control module 10 is connected with the earth terminal GND of I/O drive interface module 20; The I/O control output end mouth KQ0.0 of I/O drive interface module 20, the earth terminal GND of I/O drive interface module 20 are connected with drive end KQ0.0, the earth terminal GND of fresh water solenoid valve 6 respectively; The I/O control output end mouth KQ0.1 of I/O drive interface module 20, the earth terminal GND of I/O drive interface module 20 are connected with drive end KQ0.1, the earth terminal GND of salt water solenoid valve 7 respectively; The I/O control output end mouth KQ0.2 of I/O drive interface module 20, the earth terminal GND of I/O drive interface module 20 are connected with drive end KQ0.2, the earth terminal GND of water-drainage solenoid valve 8 respectively; The I/O control output end mouth KQ0.3 of I/O drive interface module 20, the earth terminal GND of I/O drive interface module 20 are connected with drive end KQ0.3, the earth terminal GND of discharge solenoid valve 9 respectively; The I/O control output end mouth KQ0.4 of I/O drive interface module 20, the earth terminal KM of I/O drive interface module 20 are connected with drive end KQ0.4, the power end N2 of sea water circulating pump 4 respectively; The I/O control output end mouth KQ0.5 of I/O drive interface module 20, the earth terminal GND of I/O drive interface module 20 are connected with drive end KQ0.5, the power end N2 of seawater recovery pump 5 respectively; Power input L1, the N1 of PLC control module 10 is connected with output terminal L1, the N1 of 220V input power respectively.

In this device, I/O drive interface module 20 as shown in Figure 4.24V power input+24V, the earth terminal GND of I/O drive interface module 20 is connected with power output end+24V, the earth terminal GND of external switch power supply respectively; 220V power input L2, the N2 of I/O drive interface module 20 is connected with output terminal L2, the N2 of 220V input power respectively; The I/O control inputs port Q0.0 of I/O drive interface module 20, Q0.1, Q0.2, Q0.3, Q0.4, Q0.5 are connected with I/O control port Q0.0, Q0.1, Q0.2, Q0.3, Q0.4, the Q0.5 of PLC control module 10 respectively; The earth terminal M of the I/O control port of PLC control module 10 is connected with the earth terminal GND of I/O drive interface module 20; The I/O control inputs port Q0.0 of I/O drive interface module 20 is connected with the control end Q0.0 of auxiliary reclay KA0; The earth terminal GND of I/O drive interface module 20 is connected with the control earth terminal GND of auxiliary reclay KA0; The input end IQ0.0 of auxiliary reclay KA0 is connected with the 24V power input+24V of I/O drive interface module 20; The output terminal KQ0.0 of auxiliary reclay KA0 is connected with the drive end KQ0.0 of fresh water solenoid valve 6; The earth terminal GND of I/O drive interface module 20 is connected with the earth terminal GND of fresh water solenoid valve 6; The I/O control inputs port Q0.1 of I/O drive interface module 20 is connected with the control end Q0.1 of auxiliary reclay KA1; The earth terminal GND of I/O drive interface module 20 is connected with the control earth terminal GND of auxiliary reclay KA1; The input end IQ0.1 of auxiliary reclay KA1 is connected with the 24V power input+24V of I/O drive interface module 20; The output terminal KQ0.1 of auxiliary reclay KA1 is connected with the drive end KQ0.1 of salt water solenoid valve 7; The earth terminal GND of I/O drive interface module 20 is connected with the earth terminal GND of salt water solenoid valve 7; The I/O control inputs port Q0.2 of I/O drive interface module 20 is connected with the control end Q0.2 of auxiliary reclay KA2; The earth terminal GND of I/O drive interface module 20 is connected with the control earth terminal GND of auxiliary reclay KA2; The input end IQ0.2 of auxiliary reclay KA2 is connected with the 24V power input+24V of I/O drive interface module 20; The output terminal KQ0.2 of auxiliary reclay KA2 is connected with the drive end KQ0.2 of water-drainage solenoid valve 8; The earth terminal GND of I/O drive interface module 20 is connected with the earth terminal GND of water-drainage solenoid valve 8; The I/O control inputs port Q0.3 of I/O drive interface module 20 is connected with the control end Q0.3 of auxiliary reclay KA3; The earth terminal GND of I/O drive interface module 20 is connected with the control earth terminal GND of auxiliary reclay KA3; The input end IQ0.3 of auxiliary reclay KA3 is connected with the 24V power input+24V of I/O drive interface module 20; The output terminal KQ0.3 of auxiliary reclay KA3 is connected with the drive end KQ0.3 of discharge solenoid valve 9; The earth terminal GND of I/O drive interface module 20 is connected with the earth terminal GND of discharge solenoid valve 9; The I/O control inputs port Q0.4 of I/O drive interface module 20 is connected with the control end Q0.4 of auxiliary reclay KA4; The earth terminal GND of I/O drive interface module 20 is connected with the control earth terminal GND of auxiliary reclay KA4; The input end IQ0.4 of auxiliary reclay KA4 is connected with the 220V power input L2 of I/O drive interface module 20; The output terminal KQ0.4 of auxiliary reclay KA4 is connected with the drive end KQ0.4 of sea water circulating pump 4; The 220V power output end N2 of I/O drive interface module 20 is connected with the power input N2 of sea water circulating pump 4; The I/O control inputs port Q0.5 of I/O drive interface module 20 is connected with the control end Q0.5 of auxiliary reclay KA5; The earth terminal GND of I/O drive interface module 20 is connected with the control earth terminal GND of auxiliary reclay KA5; The input end IQ0.5 of auxiliary reclay KA5 is connected with the 220V power input L2 of I/O drive interface module 20; The output terminal KQ0.5 of auxiliary reclay KA5 is connected with the drive end KQ0.5 of seawater recovery pump 5; The 220V power output end N2 of I/O drive interface module 20 is connected with the power input N2 of seawater recovery pump 5.

The control method of the utility model PLC fuzzy self-adaption seawater salinity test unit comprises the following steps:

(1), PLC control module gathers the data of salinity sensor and liquid level sensor, industrial computer is presented at the salinity of PLC control module collection and liquid level data on monitoring interface;

(2), user sets the control parameter on monitoring interface, described control parameter comprises counting of chamber maritime interior waters testing liquid salinity rate of change, seawater testing liquid salinity and the preparation of seawater testing liquid salinity;

(3), PLC control module is chosen the setting value of seawater testing liquid salinity rate of change according to the salinity precision preparation of seawater testing liquid, and the seawater of the young pathbreaker greatly testing liquid salinity process for preparation changing according to seawater testing liquid liquid level is set different mode switching control values, calculate salinity deviation mark place value and the salinity rate of change deviate of seawater testing liquid according to salinity measurement value, salinity setting value and the salinity rate of change setting value chosen, and then enforcement fuzzy polling list, the mode switching control value that judgement should be chosen adaptively;

(4), salinity deviation mark place value that the switch control module of PLC control module calculates according to step (3) and the mode switching control value chosen is further controlled the start and stop of sea water circulating pump and seawater recovery pump by I/O drive interface module and the break-make of fresh water solenoid valve, salt water solenoid valve, water-drainage solenoid valve and discharge solenoid valve is controlled, thereby realize to chamber maritime interior waters testing liquid salinity and liquid level carry out adaptive control.

Above-mentioned steps (3) regulates control by the fuzzy self-adaption seawater salinity adjustment module in PLC control module.

The switch control module of PLC control module is according to the seawater testing liquid pattern controlling value of fuzzy self-adaption seawater salinity adjustment module output and the liquid level delta data of chamber 1 maritime interior waters testing liquid, on/off to fresh water solenoid valve 6, water-drainage solenoid valve 8, salt water solenoid valve 7 and water-drainage solenoid valve 8 is controlled, realize the adjusting of chamber 1 maritime interior waters testing liquid salinity, simultaneously for the uniformity coefficient of warranty test case 1 maritime interior waters testing liquid salinity, sea water circulating pump 4 in whole process for preparation in running status; Fuzzy self-adaption seawater salinity adjustment module is responsible for the rate of change of chamber maritime interior waters testing liquid salinity to detect, and to the fresh water amount that adds in seawater testing liquid salinity adjustment process or add high salinity seawater amount and carry out self-adaptation adjustment, adjust in real time chamber maritime interior waters testing liquid in the control liquid level of preparing each stage, to obtain high salinity precision preparation and shorter salinity preparation time.

Claims

1. a PLC fuzzy self-adaption seawater salinity test unit, it is characterized in that: this test unit is by seawater salinity test platform and PLC salinity composition of the control system, described seawater salinity test platform comprises chamber (1), mother liquor tank (2) and accumulator tank (3), mother liquor tank (2) is delivered to seawater in chamber (1) by seawater intake line, seawater testing liquid in chamber (1) is delivered to accumulator tank (3) by reclaim line, recovery liquid in accumulator tank (3) route seawater circulation line after outlet pipeline flows out is delivered to mother liquor tank (2), another road emits through discharge pipe, described seawater intake line, reclaim line, on seawater circulation line and discharge pipe, be respectively equipped with salt water solenoid valve (7), water-drainage solenoid valve (8), seawater recovery pump (5) and discharge solenoid valve (9), described chamber is connected with freshwater input pipeline on (1), on freshwater input pipeline, be provided with fresh water solenoid valve (6), in chamber (1), be also provided with seawater testing liquid closed circuit, on seawater testing liquid closed circuit, be provided with sea water circulating pump (4),

Described PLC salinity control system comprises industrial computer (11), PLC control module (10), I/O drive interface module (20), sensor interface module, salinity sensor and liquid level sensor, the host computer that industrial computer (11) is described test unit, and carry out data communication with PLC control module (10), salinity sensor and liquid level sensor are for detection of chamber (1), salinity and liquid level information in mother liquor tank (2) and accumulator tank (3), the signal output part of salinity sensor and liquid level sensor is connected with the signal input part of sensor interface module, the signal output part of sensor interface module is connected with the analog input port of PLC control module (10), the I/O control port of PLC control module (10) is connected with the I/O control inputs port of I/O drive interface module (20), the I/O control output end mouth of I/O drive interface module (20) respectively with sea water circulating pump (4), seawater recovery pump (5), fresh water solenoid valve (6), salt water solenoid valve (7), water-drainage solenoid valve (8) is connected with the drive end of discharge solenoid valve (9).