CN106523340A - Broken line fault treatment system and method for pressure sensor of variable frequency air compressor - Google Patents
Broken line fault treatment system and method for pressure sensor of variable frequency air compressor Download PDFInfo
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- CN106523340A CN106523340A CN201611218620.8A CN201611218620A CN106523340A CN 106523340 A CN106523340 A CN 106523340A CN 201611218620 A CN201611218620 A CN 201611218620A CN 106523340 A CN106523340 A CN 106523340A
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- module
- voltage
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- output
- frequency
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2207/00—External parameters
- F04B2207/70—Warnings
Abstract
The invention discloses a broken line fault treatment system and method for a pressure sensor of a variable frequency air compressor. The system comprises a sampling unit, a broken line judging unit and a fault treatment unit which are integrated in a master control board of a frequency converter; the sampling unit is used for sampling a voltage-current analog quantity of the output end of the frequency converter, sampled data are stored on a register, and a voltage-current curve is automatically generated; the broken line judging unit is used for detecting a voltage signal output from the pressure sensor, when it is detected that the voltage is continuously lower than a set voltage in 3S, it is judged that a broken line happens to the pressure sensor, and a fault signal is output; and the fault treatment unit starts to work after receiving the fault signal, an output control mode of the pressure sensor is closed and is switched into an output current control mode of the frequency converter, that is to say, by means of PID, the output current and frequency of the frequency conveyer are automatically adjusted according to a pressure-current curve, the pressure needed by a user is stabilized, it is guaranteed that shutdown cannot happen in the whole running process, and meanwhile a broken line reminding warning of the pressure sensor can be sent out.
Description
Technical field
The present invention relates to the control system technical field of frequency conversion type air compressor machine, and in particular to a kind of frequency conversion air compressor pressure is passed
Sensor disconnection fault processing system and method.
Background technology
At present, frequency conversion air compressor is used widely in market, but client can face machine using frequency conversion air compressor
Various failures, wherein being exactly typically pressure transducer disconnection fault.
It is disorderly closedown to solve at present the universal processing method of above-mentioned failure both at home and abroad, and user notifies that producer changes pressure and passes
Sensor, turns back on after fixing a breakdown.It is this by the method for disorderly closedown come guarantee supply site safety.Due to shutdown suddenly
Place comprehends and causes heavy economic lossess to terminal use, also cannot win more time process to plant maintenance personnel.
The content of the invention
It is an object of the invention to provide a kind of frequency conversion air compressor pressure transducer disconnection fault processing system and method, can have
The disorderly closedown that effect solves pressure transducer disconnection fault and causes, after breaking down, air compressor machine is not shut down, and is simultaneously emitted by reporting to the police
Signal, allows client and attendant select suitable time-triggered protocol failure, makes air compressor machine more humane.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of frequency conversion air compressor pressure transducer disconnection fault processing system, including the sampling being integrated in converter master board
Unit, broken string judging unit and fault processing unit, it is characterised in that：
Described sampling unit includes electric current read module, voltage read module, data recordin module and digital modeling module, institute
The input for stating electric current read module and voltage read module is connected with the outfan of converter, is respectively used to read converter
The electric current and voltage of output, the input of the data recordin module connect electric current read module and voltage read module respectively
Outfan, for the pressure-current data of reading to be stored in the depositor of converter, the input of the digital modeling module
End connection data recordin module, for generating pressure-current curve；
Voltage detection module that described broken string judging unit includes being sequentially connected, voltage-contrast module, timing determination module and
Failure output module, the voltage detection module are connected with the outfan of converter, for detecting the electricity of pressure transducer output
Pressure signal, voltage-contrast module are used for comparison and detection voltage signal and whether are less than setting voltage, and timing determination module is for setting
Whether the interior result judgement according to the output of voltage-contrast module of fixing time there is pressure transducer disconnection fault；
Described fault processing unit includes that signal receiving module, frequency transformer control module, automatic PID modules and failure remind mould
Block, the input of the signal receiving module are connected with the outfan of the failure output module, for receiving failure output mould
The pressure transducer disconnection fault signal that block sends, the input of the frequency transformer control module connect the defeated of signal receiving module
Go out end, outfan is connected with the input of the input of the voltage detection module and automatic PID modules, is sentenced for closing down broken string
Disconnected unit, and Frequency Converter Control mode switching command, outfan and the change of the automatic PID modules are sent to automatic PID modules
The input connection of frequency device, after switching command is received, when switching to current control mode for controlling converter, PID meetings
The circuit and frequency of frequency conversion output, the input and signal of the failure prompting module are automatically adjusted according to pressure-current curve
The outfan connection of receiver module, for alerting signal is sent when there is pressure sensor failure, and in air compressor machine control panel
Upper flicker failure is reminded.
A kind of frequency conversion air compressor pressure transducer disconnection fault processing method, it is characterised in that described method includes：
1）Start air compressor machine, and wait at least 30s；
2）After starting air compressor machine 30s, data acquisition is carried out, frequency converter controller is set to into FP-08=1, into data record mould
Formula, sampling unit collection pressure-electric current of the air compressor machine in various operating modes, and the pressure-current data for being gathered is stored in
On the depositor of converter；
3）After the completion of data acquisition, sampled data is set up pressure-current curve by the digital modeling module in sampling unit；
4）Frequency converter controller is manually set to FP-08=0, and sampling unit exits data recording mode, quits work；
5）Restarting air compressor machine, the voltage analog of judging unit detection pressure transducer output of breaking, when detecting voltage
Signal is less than setting voltage, early warning pressure transducer disconnection fault；
6）After there is early warning, broken string judging unit continues detection voltage analog quantity, if continuing 3 seconds less than setting voltage, output pressure
Force transducer disconnection fault signal；
7）Fault processing unit is started working after receiving fault-signal, closes broken string judging unit；
8）Fault processing unit closing presure sensor output control pattern, sends Frequency Converter Control mode switching command；
9）After automatic PID modules in fault processing unit receive instruction, control converter switches to current control mode, i.e.,
By frequency convertor PID according to pressure-current curve, self-regulation motor output current and frequency, stable user's desirable pressure is protected
Will not shut down during card whole service；
10）Fault processing unit sends pressure transducer broken string on machinery panel and reminds, and call user's attention processes event in time
Barrier.
The invention has the beneficial effects as follows：Can effectively solving pressure transducer disconnection fault and the disorderly closedown that causes, occur
After failure, air compressor machine is not shut down, and is simultaneously emitted by alarm signal, allows client and attendant select suitable time-triggered protocol event
Barrier, makes air compressor machine more humane.
Description of the drawings
Fig. 1 is the schematic diagram of frequency conversion air compressor pressure transducer disconnection fault processing system.
The step of Fig. 2 is frequency conversion air compressor pressure transducer disconnection fault processing method block diagram.
Specific embodiment
In order that technical problem solved by the invention, technical scheme and beneficial effect become more apparent, below in conjunction with
Accompanying drawing and embodiment, the present invention is further illustrated.It should be appreciated that embodiment described herein is used only for explaining this
Invention, is not intended to limit the present invention.
As shown in figure 1, a kind of frequency conversion air compressor pressure transducer disconnection fault processing system of the invention, including being integrated in change
Sampling unit, broken string judging unit and fault processing unit in frequency device master board.
Sampling unit includes electric current read module, voltage read module, data recordin module and digital modeling module, electric current
The input of read module and voltage read module is connected with the outfan of converter, is respectively used to read converter output
Electric current and voltage, the input of data recordin module connect the outfan of electric current read module and voltage read module respectively, use
In the pressure-current data of reading is stored on the depositor of converter, the input connection data of digital modeling module are remembered
Record module, for generating pressure-current curve.
Broken string judging unit includes voltage detection module, voltage-contrast module, timing determination module and the event being sequentially connected
Barrier output module, voltage detection module are connected with the outfan of converter, for detecting the voltage signal of pressure transducer output,
Voltage-contrast module is used for whether comparison and detection voltage signal to be less than setting voltage, and timing determination module is in setting time
Whether pressure transducer disconnection fault is occurred according to the result judgement of voltage-contrast module output.
Fault processing unit includes that signal receiving module, frequency transformer control module, automatic PID modules and failure remind mould
Block, the input of signal receiving module are connected with the outfan of the failure output module, are sent out for receiving failure output module
The pressure transducer disconnection fault signal for going out, the input of frequency transformer control module connect the outfan of signal receiving module, defeated
Go out end to be connected with the input of the input of the voltage detection module and automatic PID modules, for closing down broken string judging unit,
And Frequency Converter Control mode switching command, the outfan of automatic PID modules and the input of converter are sent to automatic PID modules
Connection, after switching command is received, when switching to current control mode for controlling converter, PID can be according to pressure-electric current
Curve automatically adjusts the circuit and frequency of frequency conversion output, and the input of failure prompting module is connected with the outfan of signal receiving module
Connect, for alerting signal is sent when there is pressure sensor failure, and failure prompting is flashed on air compressor machine control panel.
As shown in Fig. 2 frequency conversion air compressor pressure transducer disconnection fault processing method of the present invention is specific as follows：
1）Start air compressor machine, and wait at least 30s.Due in air compressor machine start-up course, electric motor starting load is larger, electric current also compared with
Greatly, data in the process with actual motion when have larger difference, so should avoid this stage data sampling record
Work, sampling unit should not work；
2）After starting air compressor machine 30s, data acquisition is carried out, frequency converter controller is set to into FP-08=1, into data record mould
Formula, sampling unit collection pressure-electric current of the air compressor machine in various operating modes, and the pressure-current data for being gathered is stored in
On the depositor of converter；
3）After the completion of data acquisition, sampled data is set up pressure-current curve by the digital modeling module in sampling unit；
4）Frequency converter controller is manually set to FP-08=0, and sampling unit exits data recording mode, quits work；
5）Restarting air compressor machine, the judging unit that breaks detect the voltage of pressure transducer output with 0.1ms periodic pulse signals
Analog quantity, is less than setting voltage 1V, early warning pressure transducer disconnection fault when voltage signal is detected；
6）After there is early warning, broken string judging unit continues with 0.1mS cycle detection voltage analogs, if continuing 3 seconds less than 1V, defeated
Go out pressure transducer disconnection fault signal；
7）Fault processing unit is started working after receiving fault-signal, closes broken string judging unit；
8）Fault processing unit closing presure sensor output control pattern, sends Frequency Converter Control mode switching command；
9）After automatic PID modules in fault processing unit receive instruction, control converter switches to current control mode, i.e.,
It is by frequency convertor PID according to pressure-current curve, self-regulation motor output current and frequency, general needed for stable user
Pressure, it is ensured that will not shut down during whole service；
10）Fault processing unit sends pressure transducer broken string on machinery panel and reminds, and reminds consumer attention to process event in time
Barrier.
The pressure transducer that personnel more renew after sale, after machine is re-powered, machine automatically resets pressure transducer control
Pattern, fault processing unit reset and quit work state.After machine startup, broken string judging unit reopens work, and broken string is sentenced
Disconnected unit continues with 0.1mS cycle detection voltage analogs.System circulation state is again introduced into, system enters periodic duty shape
State.
Frequency conversion air compressor pressure transducer disconnection fault processing system once detects the voltage-mode of pressure transducer output
When analog quantity occurs abnormal, it is determined that after disconnection fault, converter immediately enters disconnection fault tupe, air compressor machine is not shut down,
It is interim to maintain curstomer's site gas.By early warning, remind user's contact producer to process, shut down to visitor for a long time after will not hindering for some reason
Bring heavy economic lossess in family.Failture evacuation after more emat sensor, when analog signalses detection is normal, can be automatically switched to again
Normal use pattern.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Any modification, equal replacement and improvement for being made within principle etc., all should fall within the scope and spirit of the invention.
Claims (2)
1. a kind of frequency conversion air compressor pressure transducer disconnection fault processing system, including being integrated in adopting in converter master board
Sample unit, broken string judging unit and fault processing unit, it is characterised in that：
Described sampling unit includes electric current read module, voltage read module, data recordin module and digital modeling module, institute
The input for stating electric current read module and voltage read module is connected with the outfan of converter, is respectively used to read converter
The electric current and voltage of output, the input of the data recordin module connect electric current read module and voltage read module respectively
Outfan, for the pressure-current data of reading to be stored in the depositor of converter, the input of the digital modeling module
End connection data recordin module, for generating pressure-current curve；
Voltage detection module that described broken string judging unit includes being sequentially connected, voltage-contrast module, timing determination module and
Failure output module, the voltage detection module are connected with the outfan of converter, for detecting the electricity of pressure transducer output
Pressure signal, voltage-contrast module are used for comparison and detection voltage signal and whether are less than setting voltage, and timing determination module is for setting
Whether the interior result judgement according to the output of voltage-contrast module of fixing time there is pressure transducer disconnection fault；
Described fault processing unit includes that signal receiving module, frequency transformer control module, automatic PID modules and failure remind mould
Block, the input of the signal receiving module are connected with the outfan of the failure output module, for receiving failure output mould
The pressure transducer disconnection fault signal that block sends, the input of the frequency transformer control module connect the defeated of signal receiving module
Go out end, outfan is connected with the input of the input of the voltage detection module and automatic PID modules, is sentenced for closing down broken string
Disconnected unit, and Frequency Converter Control mode switching command, outfan and the change of the automatic PID modules are sent to automatic PID modules
The input connection of frequency device, after switching command is received, when switching to current control mode for controlling converter, PID meetings
The circuit and frequency of frequency conversion output, the input and signal of the failure prompting module are automatically adjusted according to pressure-current curve
The outfan connection of receiver module, for alerting signal is sent when there is pressure sensor failure, and in air compressor machine control panel
Upper flicker failure is reminded.
2. a kind of frequency conversion air compressor pressure transducer disconnection fault processing method, it is characterised in that described method includes：
1）Start air compressor machine, and wait at least 30s；
2）After starting air compressor machine 30s, data acquisition is carried out, frequency converter controller is set to into FP-08=1, into data record mould
Formula, sampling unit collection pressure-electric current of the air compressor machine in various operating modes, and the pressure-current data for being gathered is stored in
On the depositor of converter；
3）After the completion of data acquisition, sampled data is set up pressure-current curve by the digital modeling module in sampling unit；
4）Frequency converter controller is manually set to FP-08=0, and sampling unit exits data recording mode, quits work；
5）Restarting air compressor machine, the voltage analog of judging unit detection pressure transducer output of breaking, when detecting voltage
Signal is less than setting voltage, early warning pressure transducer disconnection fault；
6）After there is early warning, broken string judging unit continues detection voltage analog quantity, if continuing 3 seconds less than setting voltage, output pressure
Force transducer disconnection fault signal；
7）Fault processing unit is started working after receiving fault-signal, closes broken string judging unit；
8）Fault processing unit closing presure sensor output control pattern, sends Frequency Converter Control mode switching command；
9）After automatic PID modules in fault processing unit receive instruction, control converter switches to current control mode, i.e.,
By frequency convertor PID according to pressure-current curve, self-regulation motor output current and frequency, stable user's desirable pressure is protected
Will not shut down during card whole service；
10）Fault processing unit sends pressure transducer broken string on machinery panel and reminds, and call user's attention processes event in time
Barrier.
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| CN201611218620.8A CN106523340B (en) | 2016-12-26 | 2016-12-26 | Frequency conversion air compressor pressure sensor disconnection fault processing system and method |
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Cited By (3)
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| CN109823177A (en) * | 2017-11-22 | 2019-05-31 | 湖南中车时代电动汽车股份有限公司 | A kind of protective device and method for electric car |
| CN110275553A (en) * | 2019-04-24 | 2019-09-24 | 四川中鼎智能技术有限公司 | Diagnosis control method, system, storage medium and terminal based on air compressor air storage tank pressure data process |
| CN111181471A (en) * | 2020-01-17 | 2020-05-19 | 深圳市英威腾电气股份有限公司 | Multi-frequency converter equipment and master-slave control system and method of frequency converter of multi-frequency converter equipment |
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