CN109764843A - A kind of self-correcting eurymeric waste incinerator gives trolley displacement measuring device - Google Patents
A kind of self-correcting eurymeric waste incinerator gives trolley displacement measuring device Download PDFInfo
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Abstract
The invention discloses a kind of self-correcting eurymeric waste incinerators to give trolley displacement measuring device, the present invention is combined using fixed position travel switch and stay wire displacement sensor, the method of process control dynamic compensation, it realizes to the dynamic calibration of trolley displacement measurement, so that it is guaranteed that displacement measurement accuracy does not change with runing time, it is not influenced by more emat sensor, while there is new installation or more emat sensor free debugging function.Including giving trolley, it is corresponding to enter a travel switch to trolley is respectively arranged, fall back on a travel switch, stay wire displacement sensor, remote data acquisition unit, configured with Analog input mModule and switching input module, the signal each exported to trolley stay wire displacement sensor is linked into Analog input mModule, enters a travel switch and falls back on a travel switch and be linked into switching input module；Displacement measurement PLC system for receiving the signal of remote data acquisition unit, and issues control instruction.
Description
Technical field
The invention belongs to waste incineration and generating electricity fields, and in particular to give trolley position to a kind of self-correcting eurymeric waste incinerator
Measuring system.
Background technique
With the development of social economy and the increasingly raising of living standards of the people, domestic waste be increasing and rubbish
Contradiction between rubbish processing capacity relative deficiency becomes increasingly conspicuous.How to realize the recycling of rubbish, minimizing, innoxious, has drawn
The highest attention of Qi Liao academia and engineering circles.In numerous waste disposal methods, waste incineration and generating electricity is maximally efficient way
One of diameter, and obtained gradually promotion and application.In various waste incinerators, mechanical grate incinerator has extensive suitable
Answering property and large volume handling ability are the waste incineration and generating electricity technologies of current mainstream.Mechanical grate incinerator is generally by rubbish
Feeding warehouse, gives the components such as trolley, fire grate, bed of material baffle and slag remover composition at hermatic door, and each component is in hydraulic-driven and control
Under the action of system, mutually coordinated motion control is realized.Wherein, to the amount of feeding of trolley control rubbish, to waste incineration
Combustion conditions, efficient energy conversion and the secondary emission index of furnace have great influence.
Rubbish is pushed by incinerator by periodic forward travel to trolley, the control of the Yao Shixian rubbish amount of feeding needs
Feed back to the displacement of trolley movement.It is existing that trolley displacement measurement, there are two types of ways of realization.One is small being fed
3 travel switches are installed in the tracks of vehicle, be in the layout of respectively to the 0mm of trolley travel displacement (referred to as: falling back on position),
300mm (referred to as: in place) and 1500mm (abbreviation: entering position).A cycle movement to trolley includes a full row
The setback of the forward travel of journey and a total travel.The speed of forward travel and the speed for stopping that the times being waited to determine rubbish feeding
The rubbish amount of feeding in degree and unit time.During advance, " in place " is moved to trolley from " falling back on position " and is referred to as
For the first step, recording the time used in it can be calculated to the speed of trolley, all the way moved forward to from " in place " " into
Several steps can be classified as according to the feeding demand of rubbish in place ", by controlling the advance time to the every step of trolley and stopping
The rubbish amount of feeding corresponding to the every step of trolley advance can be realized in the equal times.It is this practical to trolley displacement measurement method
On be according to 300mm before trolley the speed of service and every step run-time estimation, can not know to the real-time of trolley
Displacement.
Another form to trolley displacement measurement is realized by installation stay wire displacement sensor, bracing wire displacement sensing
Device is articulated in the rear end of trolley, and when advancing to trolley, the bracing wire of stay wire sensor is drawn out therewith, the length pulled out
It reflects to the real-time displacement of trolley, and exports 4-20mA current signal to PLC control system, thus according to the rubbish amount of feeding
Actual demand go to control the displacement advanced to trolley.To trolley retreat when, sensor bracing wire under the action of elastic force from
Dynamic retraction.This measurement method can reflect in real time to the dynamic displacement of trolley, be that the current realization rubbish amount of feeding is accurate
The important method of control.Operational effect early period of this mode is fine, but with the passage of runing time, the aging of sensor,
Deviation can gradually occur in the aging and elastic deformation of bracing wire, the measured value and actual value of displacement, to be unable to ensure rubbish feeding
The accurate control of amount.More importantly being passed if stay wire displacement sensor malfunction or damage by mounting means, bracing wire displacement
The influence of sensor brand, sensor mass often will appear biggish deviation after re-replacing.
Summary of the invention
The present invention is new to install bracing wire displacement biography in order to solve to trolley displacement measurement accuracy with runing time variation issue
Zero adjustment and range (gain) adjustment problem of sensor, re-replaces measurement error problem caused by stay wire displacement sensor
Deng providing a kind of self-correcting eurymeric waste incinerator and give trolley displacement measuring device, it is ensured that when displacement measurement accuracy is not with operation
Between change, do not influenced by more emat sensor, while there is new installation or more emat sensor free debugging function.
The object of the present invention is achieved like this:
A kind of self-correcting eurymeric waste incinerator gives trolley displacement measuring device, including n are given trolley, and n >=1 is respectively given
Trolley is separately mounted in corresponding tracks, and is driven by oil cylinder, which is characterized in that further include:
It is corresponding respectively to enter a travel switch to trolley is respectively arranged, fall back on a travel switch, stay wire displacement sensor,
It is described enter a travel switch and fall back on a travel switch be mounted on corresponding in the tracks of trolley, the bracing wire displacement
Sensor is mounted on the pedestal of oil cylinder, and the bracing wire of stay wire displacement sensor passes through hook and the hook to the setting of trolley rear end
Connection；
Remote data acquisition unit is configured with Analog input mModule and switching input module, each draws to trolley
The signal of linear movement pick-up output is linked into Analog input mModule, enters a travel switch and falls back on a travel switch access
To switching input module；
Displacement measurement PLC system is connect, for receiving remote data acquisition unit with the remote data acquisition unit
Signal, and issue control instruction.
Preferably, the remote data acquisition unit realizes the communication with displacement measurement PLC system by ProfibusDP.
Preferably, institute's displacement measurement PLC system and the PLC system of hydraulic control and incinerator motion control share.
Preferably, institute's displacement measurement PLC system is built-in with control program, comprising: acquires journey to trolley displacement data
Sequence, travel switch state acquisition and logical process program, and it is displaced dynamic calibration routine to trolley,
It gives trolley displacement data capture program: being successively read the road n analog input channel, what acquisition was displaced to trolley
A/D transcode, and be translated into project amount and carry out reasonability judgement processing；
Travel switch state acquisition and logical process program: successively acquiring 2n way switch amount input channel, obtains give respectively
The state that trolley enters a travel switch, falls back on a travel switch identifies that the stroke in motion process is opened by logical operation
It puts in place or falls back on the generation of a state into, and then obtain and enter a travel switch, fall back on the upper jump of a travel switch along signal,
Dynamic calibration routine is displaced to trolley: it is defeated will to fall back on corresponding stay wire displacement sensor when a travel switch is connected
Measured displacements out are demarcated as zero-bit, and dynamic refresh；Gain calibration: corresponding bracing wire position when a travel switch is connected will be entered
The measured displacements of displacement sensor output are demarcated as full scale, and dynamic refresh.
Preferably, it is displaced dynamic calibration routine to trolley, included the following steps:
It is displaced step 1: obtaining to trolley, formula is as follows:
L (k): measured value, N are displaced to trolleymin: analog input code lower limit, Nmax: on analog input code
Limit, Lmin: stay wire displacement sensor Lower Range, Lmax: the stay wire displacement sensor range upper limit, N: analog input code；
Step 2: carrying out zero correction to being displaced to trolley, formula is as follows:
LC0(k)=L (k)-L0(k)
LC0(k): being displaced to trolley after carrying out zero correction, L0(k): the dynamic zero point being displaced to trolley, L (k):
Measured value is displaced to trolley；
Step 3: obtaining the upper jump edge for the travel switch state that falls back on, formula is as follows:
SQB_ON ↑: the upper jump edge of a travel switch state is fallen back on to trolley, SQB (k): falling back on a stroke to trolley
SQB (k-1): the current period state of switch falls back on a upper periodic state for a travel switch to trolley；
Step 4: realizing to the dynamic refresh of trolley zero displacement point
When SQB_ON ↑ be 1 when, execute L0(k) ← L (k) refreshes L0(k), the dynamic zero point being displaced to trolley is obtained；
Step 5: carrying out dynamic gain correction to being displaced to trolley, formula is as follows:
LC(k)=LC0(k).G(k)
LC(k): giving trolley to be displaced after progress zero point and gain calibration, LC0(k): the feed after carrying out zero correction is small
Parking stall is moved, G (k): the dynamic gain being displaced to trolley；
A travel switch state is entered step 6: obtaining, formula is as follows:
SQF_ON ↑: the upper jump edge of a travel switch state is entered to trolley, SQF (k): entering a stroke to trolley
SQF (k-1): the current period state of switch enters a upper periodic state for a travel switch to trolley；
Step 7: realizing to the dynamic refresh of trolley displacement gain
As SQF_ON ↑ be 1, dynamic refresh G (k), formula is as follows:
LCH(k)←LC(k)
G (k): the dynamic gain being displaced to trolley, LSQF: enter being displaced when travel switch is connected to trolley
Actual value, LCH(k): entering the measured value being displaced to trolley when a travel switch is connected, LC(k): carrying out zero point and gain
Being displaced to trolley after correction.
By adopting the above-described technical solution, the invention has the following beneficial effects:
The present invention is combined using fixed position travel switch and stay wire displacement sensor, the side of process control dynamic compensation
Method is realized to the dynamic calibration of trolley displacement measurement, so that it is guaranteed that displacement measurement accuracy does not change with runing time, not by more
The influence of emat sensor, while having the function of that newly installation or more emat sensor exempt to debug (zero adjustment and range adjustment).
Detailed description of the invention
Fig. 1 gives trolley displacement measuring device composition block diagram；
Fig. 2 controls program flow diagram to trolley displacement measuring device.
Appended drawing reference
In Fig. 1: 1: give trolley, 2: a travel switch is entered to trolley, 3: feed moving of car track, 4: bracing wire position
The bracing wire of displacement sensor, 5: hydraulic cylinder；6: a travel switch is fallen back on to trolley, 7: stay wire displacement sensor.
Specific embodiment
Invention is further explained with reference to the accompanying drawing, participates in Fig. 1, Fig. 2, a kind of self-correcting eurymeric waste incineration in position
Embodiment of the furnace to trolley displacement measuring device.
1. being formed to trolley displacement measuring device
According to the ability of daily processing rubbish, waste incinerator generally have 200t/d, 250t/d, 300t/d, 350t/d,
The plurality of specifications such as 400t/d, 450t/d, 500t/d, 550t/d, 600t/d, 650t/d, 700t/d and 750t/d.By configuring not
Feed platform and different number with size realize different garbage disposal abilities to trolley, to the configuration number of trolley
Amount generally has the multiple types such as 2,4,6 and 8.Attach most importance to type mechanical equipment to trolley, is hydraulically operated its fortune of advancing
Dynamic and setback.
To trolley displacement measuring device by n enter a travel switch (n is to the quantity of trolley), n fall back on position
Travel switch, n stay wire displacement sensor, 1 remote data acquisition unit and 1 set of displacement measurement PLC system composition, are shown in attached drawing
1.Displacement measurement PLC system can be shared with incinerator hydraulic station and the PLC system of incinerator motion control.
It enters a travel switch and falls back on a travel switch and be fixed in the tracks to trolley by mounting bracket.
When entering to trolley, travel switch in place is installed into the position for connecting travel switch to trolley shelves iron；It is fed small
When vehicle is fallen back on, a travel switch is fallen back in the position installation for connecting travel switch to trolley shelves iron.Bracing wire displacement sensing
Device is mounted on the pedestal of oil cylinder, and the bracing wire of stay wire displacement sensor is interconnected by hook and the hook to trolley rear end face.
When advancing under hydraulic driving to trolley, the bracing wire of stay wire displacement sensor is drawn out, the 4-20mA of sensor output
Current signal increases；When retreating to trolley, the bracing wire of stay wire displacement sensor automatic retracted under the action of its spring is passed
The 4-20mA current signal of sensor output reduces.
Remote data acquisition unit is mounted at 7 meters of platforms of incinerator, logical configured with 8 channel analogy amount input modules and 32
Road switching input module.The 4-20mA signal each exported to trolley stay wire displacement sensor is linked into analog input mould
Block enters a travel switch and falls back on a travel switch and be connected to switching input module.
Remote data acquisition unit is realized by ProfibusDP and the communication of displacement measurement PLC system, in order to reduce into
This, displacement measurement PLC system can be shared with the PLC system of hydraulic control and incinerator motion control.
2. the dynamic calibration being displaced to trolley
The dynamic calibration being displaced to trolley includes zero correction and gain calibration two parts.To trolley by hydraulic cylinder
It pushes and realizes forward travel or setback.Since hydraulic cylinder is rigid, so giving the practical zero point and whole process of trolley
Displacement is constant, but since the elastic deformation of aging, the bracing wire of stay wire displacement sensor and the installation of more emat sensor miss
Difference, actual measurement go out to trolley displacement and actual displacement there are deviations.Based on this, believed using a travel switch state is fallen back on
Breath demarcates the measured displacements for falling back on corresponding stay wire displacement sensor output when a travel switch is connected in conjunction with control program
For zero-bit；Similarly, it using entering a travel switch status information, in conjunction with control program, will enter when a travel switch is connected pair
The measured displacements for the stay wire displacement sensor output answered are demarcated as full scale.Basic step is as follows:
It is displaced step 1: obtaining to trolley, formula is as follows:
L (k): measured value, N are displaced to trolleymin: analog input code lower limit, Nmax: on analog input code
Limit, Lmin: stay wire displacement sensor Lower Range, Lmax: the stay wire displacement sensor range upper limit, N: analog input code；
Step 2: carrying out zero correction to being displaced to trolley, formula is as follows:
LC0(k)=L (k)-L0(k)
LC0(k): being displaced to trolley after carrying out zero correction, L0(k): the dynamic zero point being displaced to trolley, L (k):
Measured value is displaced to trolley；
Step 3: obtaining the upper jump edge for the travel switch state that falls back on, formula is as follows:
SQB_ON ↑: the upper jump edge of a travel switch state is fallen back on to trolley, SQB (k): falling back on a stroke to trolley
SQB (k-1): the current period state of switch falls back on a upper periodic state for a travel switch to trolley；
Step 4: realizing to the dynamic refresh of trolley zero displacement point
When SQB_ON ↑ be 1 when, execute L0(k) ← L (k) refreshes L0(k), the dynamic zero point being displaced to trolley is obtained；
Step 5: carrying out dynamic gain correction to being displaced to trolley, formula is as follows:
LC(k)=LC0(k).G(k)
LC(k): giving trolley to be displaced after progress zero point and gain calibration, LC0(k): the feed after carrying out zero correction is small
Parking stall is moved, G (k): the dynamic gain being displaced to trolley,
A travel switch state is entered step 6: obtaining, formula is as follows:
SQF_ON ↑: the upper jump edge of a travel switch state is entered to trolley, SQF (k): entering a stroke to trolley
The current period state of switch, SQF (k-1): entering a upper periodic state for a travel switch to trolley,
Step 7: realizing to the dynamic refresh of trolley displacement gain
As SQF_ON ↑ be 1, dynamic refresh G (k), formula is as follows:
LCH(k)←LC(k)
G (k): the dynamic gain being displaced to trolley, LSQF: enter being displaced when travel switch is connected to trolley
Actual value, LCH(k): entering the measured value being displaced to trolley when a travel switch is connected, LC(k): carrying out zero point and gain
Being displaced to trolley after correction.
Above-mentioned 7 step is periodically carried out, the dynamic calibration to trolley zero displacement point and gain can be realized, effectively overcome
The measurement error being displaced caused by stay wire displacement sensor aging, bracing wire elastic deformation to trolley.After introducing dynamic calibration, newly
Stay wire displacement sensor or replacement stay wire displacement sensor are installed, zero point adjustment and gain adjustment can be removed from.
3. controlling program to trolley displacement measuring device
Controlling program includes being fed trolley displacement data capture program, travel switch state acquisition and logical process program,
Dynamic calibration routine three parts are displaced to trolley, control program circuit is as shown in Fig. 2.
Give trolley displacement data capture program: being successively read the road n analog input channel, (n is to the number of trolley
Amount), the A/D transcode being displaced to trolley is obtained, and be translated into project amount and carry out reasonability judgement processing.
Travel switch state acquisition and logical process program: successively acquiring 2n way switch amount input channel, (n is to trolley
Quantity), obtain the state for entering a travel switch to trolley, falling back on a travel switch respectively, by logical operation, effectively
Travel switch in identification motion process enters position or falls back on the generation of a state, i.e., effectively obtains and enter a travel switch, move back
The upper jump of travel switch is along signal in place.
Be displaced dynamic calibration routine to trolley: by 7 steps above-mentioned to trolley displacement dynamic calibration, realization is given
The dynamic calibration of trolley zero displacement point and gain.
4. specific implementation
Step 1: being installed into travel switch in place and its bracket on entering the corresponding track in position to trolley, it is being fed
Trolley falls back on installation on the corresponding track in position and falls back on a travel switch and its bracket.
Step 2: install stay wire displacement sensor on to trolley cylinder pedestal, and it is small that its bracing wire is articulated in feed
On the hook of the rear end face of vehicle.
Step 3: by the 4-20mA output signal of stay wire displacement sensor, entering a travel switch output signal, falling back on position
Travel switch output signal, which is connected to, gives trolley displacement measurement PLC system.
Step 4: being write by process shown in attached drawing 2, lower dress and operation are opened to trolley displacement data capture program, stroke
Off status acquisition and logical process program, are displaced dynamic calibration routine to trolley.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention and not to limit it, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (5)
1. a kind of self-correcting eurymeric waste incinerator gives trolley displacement measuring device, including n are given trolley, and n >=1 is each to be fed
Trolley is separately mounted in corresponding tracks, and is driven by oil cylinder, which is characterized in that further include:
It is corresponding respectively to enter a travel switch to trolley is respectively arranged, fall back on a travel switch, stay wire displacement sensor, it is described
It enters a travel switch and falls back on a travel switch and be mounted on corresponding in the tracks of trolley, the bracing wire displacement sensing
Device is mounted on the pedestal of oil cylinder, and the bracing wire of stay wire displacement sensor is connected by hook with the hook being arranged to trolley rear end
It connects；
Remote data acquisition unit is configured with Analog input mModule and switching input module, each gives trolley bracing wire position
The signal of displacement sensor output is linked into Analog input mModule, enters a travel switch and falls back on a travel switch and be linked into out
Measure input module in pass；
Displacement measurement PLC system is connect, for receiving the letter of remote data acquisition unit with the remote data acquisition unit
Number, and issue control instruction.
2. a kind of self-correcting eurymeric waste incinerator according to claim 1 gives trolley displacement measuring device, feature exists
In the remote data acquisition unit is realized by ProfibusDP and the communication of displacement measurement PLC system.
3. a kind of self-correcting eurymeric waste incinerator according to claim 1 gives trolley displacement measuring device, feature exists
In institute's displacement measurement PLC system is shared with the PLC system of hydraulic control and incinerator motion control.
4. a kind of self-correcting eurymeric waste incinerator according to claim 1 gives trolley displacement measuring device, feature exists
In institute's displacement measurement PLC system is built-in with control program, comprising: give trolley displacement data capture program, travel switch shape
State acquisition and logical process program, and it is displaced dynamic calibration routine to trolley,
It gives trolley displacement data capture program: being successively read the road n analog input channel, obtain the A/D being displaced to trolley
Transcode, and be translated into project amount and carry out reasonability judgement processing；
Travel switch state acquisition and logical process program: successively acquiring 2n way switch amount input channel, and it is small to obtain feed respectively
The state that vehicle enters a travel switch, falls back on a travel switch, by logical operation, identify travel switch in motion process into
In place or the generation of a state is fallen back on, and then obtains and enter a travel switch, falls back on the upper jump of a travel switch along signal,
Dynamic calibration routine is displaced to trolley: will fall back on what corresponding stay wire displacement sensor when travel switch is connected exported
Measured displacements are demarcated as zero-bit, and dynamic refresh；Corresponding stay wire displacement sensor output when a travel switch is connected will be entered
Measured displacements be demarcated as full scale, and dynamic refresh.
5. a kind of self-correcting eurymeric waste incinerator according to claim 4 gives trolley displacement measuring device, feature exists
In, give trolley be displaced dynamic calibration routine, include the following steps:
It is displaced step 1: obtaining to trolley, formula is as follows:
L (k): measured value, N are displaced to trolleymin: analog input code lower limit, Nmax: the analog input code upper limit,
Lmin: stay wire displacement sensor Lower Range, Lmax: the stay wire displacement sensor range upper limit, N: analog input code；
Step 2: carrying out zero correction to being displaced to trolley, formula is as follows:
LC0(k)=L (k)-L0(k)
LC0(k): being displaced to trolley after carrying out zero correction, L0(k): the dynamic zero point being displaced to trolley, L (k): feed
Trolley is displaced measured value；
Step 3: obtaining the upper jump edge for the travel switch state that falls back on, formula is as follows:
SQB_ON ↑: the upper jump edge of a travel switch state is fallen back on to trolley, SQB (k): falling back on a travel switch to trolley
Current period state, a upper periodic state for a travel switch SQB (k-1): is fallen back on to trolley；
Step 4: realizing to the dynamic refresh of trolley zero displacement point
When SQB_ON ↑ be 1 when, execute L0(k) ← L (k) refreshes L0(k), the dynamic zero point being displaced to trolley is obtained；
Step 5: carrying out dynamic gain correction to being displaced to trolley, formula is as follows:
LC(k)=LC0(k).G(k)
LC(k): giving trolley to be displaced after progress zero point and gain calibration, LC0(k): giving trolley position after carrying out zero correction
It moves, G (k): the dynamic gain being displaced to trolley；
A travel switch state is entered step 6: obtaining, formula is as follows:
SQF_ON ↑: the upper jump edge of a travel switch state is entered to trolley, SQF (k): entering a travel switch to trolley
Current period state, a upper periodic state for a travel switch SQF (k-1): is entered to trolley；
Step 7: realizing to the dynamic refresh of trolley displacement gain
As SQF_ON ↑ be 1, dynamic refresh G (k), formula is as follows:
LCH(k)←LC(k)
G (k): the dynamic gain being displaced to trolley, LSQF: enter the reality being displaced to trolley when a travel switch is connected
Value, LCH(k): entering the measured value being displaced to trolley when a travel switch is connected, LC(k): carrying out zero point and gain calibration
Afterwards give trolley displacement.
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| CN113063338A (en) * | 2021-03-15 | 2021-07-02 | 北京环卫集团环卫装备有限公司 | Method, device and system for checking stay wire sensor |
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