CN209494572U - A kind of single fluid grouting control system based on PWM controller - Google Patents

Abstract

The single fluid grouting control system based on PWM controller that the utility model discloses a kind of, including the station host computer, PLC, sensor and ratio adjusting valve, the station PLC, including PWM control module, PID adjustment module, distributed I/O module；The detection information of Grouting Pipe output end is transmitted in distributed I/O module by sensor, it is stored in data register after the conversion of the A/D conversion module of distributed I/O module, the limit value that PID adjustment module sets conversion signal and host computer is sent to PWM control module after handling, control wave is transmitted to ratio adjusting valve by distributed I/O module by PWM control module, the utility model dynamic response is fast, overshoot is small, and the scope of application is wider；The D/A output module in classical control system is saved simultaneously, has saved cost；Another aspect control mode is simple and effective, and initialization and parameter modification can be operated directly on PLC, flexible operation；Increase degree of regulation in combination with PID control instruction, is suitable for controlling occasion with high accuracy.

Description

A kind of single fluid grouting control system based on PWM controller

Technical field

The utility model belongs to control debugging field in shield, specifically designs a kind of single fluid grouting based on PWM controller Control system.

Background technique

Control system is complicated in shield excavation machine, acquires various while hydraulic signal point, fluid, motor, frequency converter etc. Control require fast response time, while control precision height, strong interference immunity.Therefore the control module of proportioning valve is mostly used, it drives The aperture that proportioning valve routinely uses amplification board control valve core is adjusted, velocity pressure or flow are controlled；It is controlled using amplification board necessary Using the PLC for having analog output, the signal of live executive component is realized by analog output module to electrical amplification board The adjusting of amplification board and proportioning valve controls；Proportioning valve is controlled using amplification board, need to be added such as D/A module, on the one hand increases cost, separately On the one hand, the situation more in controlling and regulating system, will cause point and increases, and control box layout is difficult.Simultaneously in view of amplification The power supply of plate be not it is independently-powered, anti-interference ability is weaker, increase design difficulty.

Utility model content

To be solved in the utility model is in shield excavation machine, and the debugging of proportional valve control system is complicated, anti-interference ability It is weaker, the problems such as route design layout is complicated, a kind of single fluid grouting control system based on PWM controller is provided, setting is passed through Distributed I/O completes wiring control nearby, can reduce terminal, cable and installation space.

In order to solve the above technical problems, technical solution used by the utility model is as follows:

A kind of single fluid grouting control system based on PWM controller, including the station host computer, PLC, sensor and proportion adjustment Valve, described sensor, including temperature sensor, flow sensor and pressure sensor etc..The station PLC, including PWM control mould Block, PID adjustment module, distributed I/O module；The detection information of Grouting Pipe output end is transmitted to distributed I/O module by sensor, It is stored in data register after the conversion of the A/D conversion module of distributed I/O module, PID adjustment module is to conversion signal PWM control module is sent to after being handled with the limit value of host computer setting, PWM control module will by distributed I/O module Control wave is transmitted to ratio adjusting valve, and then realizes the regulation and control to temperature, pressure, flow etc..

There is following improvement compared with the existing technology in the utility model:

1, amplification board being controlled by the I/O module of PLC originally and drives proportioning valve, tie point is more, and occupancy point is more, and it is at high cost, The utility model controls proportioning valve by distributed I/O and PWM, and control circuit is simple, it can be achieved that closed loop adjusts control.

2, original that proportioning valve is controlled to adjust by amplification board, it needs band downloading wire that parameter is set, carries out hardware initialization and set It sets；The utility model initiation parameter, flexible operation can save the time in the station PLC using PWM control module.

3, the control of amplification board comparative example valve is used originally, and anti-interference ability is weaker；The PWM of the utility model controls letter It include the pulsating quantity of same frequency in number, anti-interference ability is stronger, and lag time is short, and precision is higher.

And the PWM control module that the utility model uses, has the benefit that

1. using pulse width modulation type circuit, generate heat small, it is low in energy consumption.

2. parameters numberization is adjusted, intelligentized design.

3. being powered using independent current source, anti-interference is good.

4. analog input voltage is shown, pulse input digital display shows, exports electric current real-time display, overload protection, short circuit is protected Shield, is effectively protected proportioning valve.

Tthe utility model system dynamic response is fast, and overshoot is small, and the scope of application is wider；Classical control system is saved simultaneously In D/A output module, saved cost；Another aspect control mode is simple and effective, and initialization and parameter modification can directly exist It is operated on PLC, flexible operation；Increase degree of regulation in combination with PID control instruction, is suitable for controlling occasion with high accuracy.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the system block diagram of the utility model.

Fig. 2 is the control block diagram of the utility model.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are under that premise of not paying creative labor Every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Figs. 1-2, a kind of single fluid grouting control system based on PWM controller, including the station host computer, PLC, sensing Device and ratio adjusting valve, described sensor, including temperature sensor, flow sensor and pressure sensor etc..The station PLC, Including PWM control module, PID adjustment module, distributed I/O module, A/D conversion module, data register；Sensor is by slip casting The detection information of pipe output end is stored in number after the conversion of A/D conversion module by distributed I/O module transfer to A/D conversion module According in register, the limit value that PID adjustment module sets conversion signal and host computer obtains control amount after handling, and will Control amount is sent to PWM control module, and control wave is transmitted to ratio tune by distributed I/O module by PWM control module Valve is saved, and then realizes the regulation and control to temperature, pressure, flow etc..

The principles of the present invention are as follows:

By the configuration of PWM control module in distributed I/O systems, wiring control is completed nearby, can reduce terminal, cable And installation space.

And PWM control module is connected with proportioning valve, and SIEMENS PLC issues variable duty from exporting built in CPU element The pulse output signals of ratio, using the PLC for having transistor output subfamily, defining two of them is respectively Y000 and Y001, Therefore the output terminal of pulsewidth modulation (PWM) instruction is Y000 and Y001；By PWM output order can be set pulse width and Period, it is assumed that S1 is specified for pulsewidth, and pulsewidth is calculated by PID control；If S2 is specified for the period, pass through corresponding speed and adjusting The demand of precision, the value of settable pulse period；The control of comparative example valve is realized by the adjusting of duty ratio in program, it is stable Export current or voltage.

The process of PWM output order: pulse control word and inceptive impulse parameter, initialization PWM control are arranged by program Module；It (is selected according to real sensor collection capacity, 4-20mA or 0- in PLC program by Analog input mModule 10V) realize the A/D conversion of collection value, the numerical value after conversion stores in data register, controls by the programming of PLC Output terminal, and then control the unlatching size of proportioning valve.

The increasing or decreasing that can flexibly realize pulse width and period using PLC programming simultaneously, adjusts duty ratio Reach the unlatching size of continuous control proportioning valve.

While PWM control corresponding speed is fast, need to meet the needs of control precision, be used in proportional valve control system PID control mentions high control precision, and after the signal value of sensor is sent into PLC, the input value after A/D is converted is 0-N, target tune Section value is X, is stored in digital register one, and the conversion of sensor feedback value is stored in register two, through PLC internal proprietary PID ordering calculation (is first filtered value of feedback, generallys use the effect of filter constant control filtering；Secondly it adjusts The value of proportional gain is 0 by the setting time of integration, the differential gain and derivative time, reaches pure proportional algorithm, debugs ratio The value of gain finds the proportional gain value of the shorter situation of output transition time；The setting of the time of integration: integral part can be eliminated Steady-state error mentions high control precision, adjusts the time of integration by observing system output；The differential gain: differential part reflection system The trend of system output variation, has advanced and prediction effect, the adjusting of the differential gain can be carried out in particular requirement, in shield In structure proportional valve control generally filtering, ratio, integral adjusting can meet demand.) the M integer of 0-N range is obtained, this is whole Number M is as time range t(t=M) (0-10s), the pulse of a cycle 10s is designed, pulse width t passes through the pulse width Export the folding size that proportioning valve is controlled to proportioning valve.

The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in Change or replacement, should be covered within the scope of the utility model.

Claims (2)

1. a kind of single fluid grouting control system based on PWM controller, including the station host computer, PLC, sensor and proportion adjustment Valve, it is characterised in that: the station PLC, including PWM control module, PID adjustment module, distributed I/O module；Sensor is by slip casting The detection information of pipe output end is transmitted to distributed I/O module, is stored in after the conversion of the A/D conversion module of distributed I/O module In data register, the limit value that PID adjustment module sets conversion signal and host computer is sent to PWM after handling Control wave is transmitted to ratio adjusting valve by distributed I/O module by control module, PWM control module.

2. the single fluid grouting control system according to claim 1 based on PWM controller, it is characterised in that: the sensing Device, including temperature sensor, flow sensor and pressure sensor.