CN107462504A - Online self-correcting air particle detection means and its self-correcting, state self-diagnosing method - Google Patents
Online self-correcting air particle detection means and its self-correcting, state self-diagnosing method Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 154
- 239000002245 particle Substances 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 34
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- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000004092 self-diagnosis Methods 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 20
- 238000005259 measurement Methods 0.000 claims description 19
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- 239000013618 particulate matter Substances 0.000 claims description 6
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
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Abstract
The present invention relates to a kind of online self-correcting air particle detection means and its self-correcting, state self-diagnosing method, it includes gear automatic switching control equipment, gas path switching device and the control device being connected with particle concentration detection means；Control device controls gear automatic switching control equipment and gas path switching device carries out gear switch and gas circuit switching, particle concentration detection means is in different working modes；Gear automatic switching control equipment is arranged in crust of the device, and it includes knob, support meanss, the power set for providing power for mechanical device and the position detecting device for being detected to knob position with the mechanical device of knob linkage, for providing support for mechanical device；Knob one end is connected with the standard printing opacity template in particle concentration detection means, and the other end is connected with mechanical device；Gas path switching device is connected with the liquid passage inlet in particle concentration detection means.The present invention can be widely applied to air particle detection field.
Description
Technical field
The present invention relates to a kind of air particle detection means and method, especially with regard to a kind of online self-correcting air particles
Analyte detection device and its self-correcting, state self-diagnosing method.
Background technology
With Chinese national economy development and urbanization, it is industrialized quickly propel, Particulate Pollution turns into the whole society
The major issue of each side concern.China signed Paris weather agreement in 2015, while increased environmental monitoring and renovation dynamics.
Each place has also progressively refined the hard objectives of environment supervision.The monitoring of wherein air particle is one of important content.
Air particle detection means also experienced by sampling observation to continuous monitoring, single-point detect gridding be laid out,
Simple data check the process of big data analysis.In the process, for the remote auto work(of air particle detection means
And reliability, the accuracy of measurement data and easy to maintain etc. it can be proposed new requirement.
On the one hand, because the air particle detection means overwhelming majority continuously monitors in outdoor, different uses ring
Border, climate change and system time drift can produce for the part such as air particle detection means itself gas circuit, light path, circuit
It is certain to influence.On the other hand, because the gridding application of air particle monitoring, air particle detection means progressively spread all over city
Township, quantity is big, distance is remote, manual maintenance inconvenience, and cost is high.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of online self-correcting air particle detection means and its certainly
School, state self-diagnosing method, the device can carry out calibration or long-range school automatically according to use environment, weather, the different of region
Standard, meanwhile, there is the functions such as remote status self diagnosis and breakdown judge.
To achieve the above object, the present invention takes following technical scheme：A kind of online self-correcting air particle detection means,
Including particle concentration detection means, it is characterised in that：It includes the gear being connected with the particle concentration detection means certainly
Dynamic switching device, gas path switching device and control device；The control device sends according to Local or Remote control instruction and controlled
Signal is to the gear automatic switching control equipment and gas path switching device, the gear automatic switching control equipment and gas path switching device root
Gear switch and gas circuit switching are carried out according to the control signal received, the particle concentration detection means is in different operating
Pattern；The gear automatic switching control equipment is arranged in crust of the device, and it includes knob, the machinery dress with the knob linkage
Put, the support meanss for providing support for the mechanical device, the power set for providing power for the mechanical device
And the position detecting device for being detected to the knob position；Detected with the particle concentration described knob one end
Standard printing opacity template in device is connected, and the other end is connected with the mechanical device；The gas path switching device and the particle
Liquid passage inlet in thing concentration detection apparatus is connected.
The mechanical device includes the shaft coupling, guidance axis, screw rod and the alignment pin that are sequentially connected, the shaft coupling it is another
End is connected with the knob, and the alignment pin for making the guidance axis and the screw rod linkage is provided on the guidance axis,
The screw rod other end is arranged in the support meanss.
The support meanss include support base, bearing and bearing cap, are provided with the support base and are passed for the screw rod
Circular hole, the screw rod other end is arranged on the bearing after being passed by the support base, and fixed by the bearing cap.
The power set include motor and two transmission mechanisms, and the motor is fixedly installed on described device shell and support
On seat, controlled by the control device；The output end of the motor is connected with two transmission mechanisms, and the transmission mechanism drives
The screw action；The position detecting device includes position sensible element and position sensor, and the position sensible element is set
Put on the shaft coupling, for sending position signalling to the position sensor, the position according to the position of the knob
The position signalling received is sent to the control device by sensor.
The control device includes the control panel being arranged on described device housing, and control mould is provided with the control panel
Block, the control module include automatic control module, Local Control Module, remote control module, the module of self-correcting zero, self-correcting quasi-mode
Block and self diagnosis module；The automatic control module is used for when the particle concentration detection means is started shooting, to the particle
Thing concentration detection apparatus carries out Initialize installation and upper electric self-correcting, and controls the particle concentration detection means to enter measurement shape
State；The teleinstruction that the remote control module is used to receive host computer transmission is sent to Local Control Module, and to host computer
Upload the feedback information of the Local Control Module；The Local Control Module is used to receive Local or Remote control instruction, will
It is converted to control signal and is sent to the module of self-correcting zero or self calibration module, while receives school zero, calibration or the state of return
Self-diagnosis information；The module of self-correcting zero is used to, according to the control signal of self-correcting zero received, detect the particle concentration
Device measures value zero point correction, and the result of self-correcting zero is sent into the Local Control Module；The self calibration module is used
According to the self calibration control signal that receives, measuring value calibration to the particle concentration detection means, and by self-correcting
Quasi- result is sent to the Local Control Module；The self diagnosis module is for the self-correcting zero in Local Control Module or certainly
Calibration result, state self diagnosis is carried out to the particle concentration detection means and status information is returned into the local control
Module.
The automatic control module includes initialization control module and start self-correcting module；The initialization control module is used
In when the particle concentration detection means is started shooting, Initialize installation is carried out to the particle concentration detection means；It is described
Start self-correcting module is used to send control signals to self calibration module successively and the module of self-correcting zero completes upper electric self-correcting, and according to certainly
The status information that diagnostic module is collected controls the particle concentration detection means to enter measuring state；The Local Control Module
Including the module of timing self-correcting zero, timing self calibration module, remote control commands processing module and data memory module；It is described fixed
When self-correcting zero control module be used to, according to default self-correcting null cycle, periodically send the control signal of self-correcting zero to the self-correcting zero
Module；The timing self calibration control module is used to, according to default self-calibration cycle, periodically send self calibration control signal
To the self calibration module；The remote control commands processing module is used to receive the host computer that the remote control module is sent
Teleinstruction, and the host computer teleinstruction is converted into control signal and is sent to the module of self-correcting zero or self-correcting quasi-mode
Block；The data memory module is for receiving and storing the module of self-correcting zero, self calibration module or self diagnosis module return
School zero, calibration and condition diagnosing information.
A kind of self-correcting of online self-correcting air particle detection means, state self-diagnosing method, it is characterised in that including with
Lower step：1) after detection means start, is carried out by initialization and is set for itself and particle concentration detection means by automatic control module
Put and upper electric self-correcting after, control particle concentration detection means enter measuring state；2) local or host computer by control panel to
Local Control Module or remote control module send control instruction, and the control instruction received is converted to phase by Local Control Module
Control signal is answered to be sent to the module of self-correcting zero or self calibration module；3) after self calibration module receives self calibration control signal, enter
Enter corresponding self-calibration mode, gear automatic switching control equipment and particle concentration detection means are sent control signals to, to particulate matter
Concentration detection apparatus measures value calibration, and calibration result is sent into Local Control Module；4) module of self-correcting zero receives
After the control signal of self-correcting zero, into corresponding self-correcting null mode, intake valve and particle concentration detection means are sent control signals to,
Value zero point correction is measured to particle concentration detection means, and the result of high-ranking officers zero returns to Local Control Module；5) autodiagnosis
Disconnected self-correcting zero-sum self-alignment measurement result of the module in Local Control Module, to the state of particle concentration detection means
Judged, and return to corresponding state information.
In the step 3), method that self calibration module measures value calibration to particle concentration detection means, including
Following steps：1. self calibration module sends control signals to motor so that motor rotates forward, and is driving screw rod just by transmission mechanism
Turn；2. screw rod drives guidance axis to move by alignment pin, and then is rotated by shaft coupling knob, knob is advanced into calibration
Position, now standard printing opacity template be located in light path；3. position sensible element sends position signalling and passed to position sensor, position
The position signalling of knob is sent to control panel by sensor；4. after control panel receives the position signalling that position sensor is sent,
Controlled motor stop motion, and knob is maintained at calibrating position；5. optical detection unit starts to measure, if process dry measure is all
After phase, measured value is adjusted to calibration value and stored；6. automatic calibration module controlled motor reversion, makes transmission mechanism drive screw rod
Reversion, screw rod drive guidance axis to move, rotate knob and be advanced into measurement position, self-calibration process terminates by alignment pin.
In the step 4), method that the module of self-correcting zero measures value zero point correction to detection means, including following step
Suddenly：1. the module of self-correcting zero sends control signals to intake valve, particle concentration detection means inner air path and extraneous gas are cut off
Path so that particle concentration detection means is internally formed closure gas circuit；2. the module of self-correcting zero sends control signals to particle
Thing concentration detection apparatus booster air pump, gas enter optical detection unit after the filtering of self-filtering unit so that particulate matter is dense
Detection means inner air continuous circulating filtration in closure gas circuit is spent, until of inner air that optical detection unit measures
Untill grain thing concentration no longer changes, measured value now is recorded；3. the module of self-correcting zero sends control signals to intake valve so that
Grain thing concentration detection apparatus inner air path connects with extraneous gas, and the process of this self-correcting zero finishes；If 4. repeat step 1.~3.
Dry time, obtained each measured value is averagely obtained into average value, as the basic noise value of particle concentration detection means, entered
Row preserves, and the process of self-correcting zero finishes.
In the step 5), the method that self diagnosis module is judged the state of particle concentration detection means is：If
The measured value returned after calibration in the range of calibration value allowable error, and the null value behind school zero then judge less than previous school null value be
System state is drift；If measured value is more than 10% with calibration value relative error magnitudes absolute value after calibration, it is judged as optical detection
Unit internal components damage, and prompt maintenance；If above-mentioned two are normal, and the cycle of operation reaches sampling dynamical system life cycle,
Prompting maintenance.
For the present invention due to taking above technical scheme, it has advantages below：1st, the present invention is provided with gear automatic switchover
Device and gas path switching device, the mode of operation of particle concentration detection means can be automatically switched as requested, it is real
The now difference in functionality of measurement and self-correcting.2nd, the module of self-correcting zero, self calibration module and self diagnosis are provided with control device of the present invention
Module, self-correcting zero, self calibration or the state self-diagnostic function of particle concentration detection means can be realized according to external environment.3、
Remote control module is provided with control device of the present invention, remote control commands can be received, realizes particle concentration detection dress
Put the functions such as remote status self diagnosis and breakdown judge, for quantity it is big, apart from remote air particle concentration detection apparatus and
Speech, effectively reduces its manual maintenance cost.Thus the present invention can be widely applied in air particle detection field.
Brief description of the drawings
Fig. 1 is the structural representation of online self-correcting air particle detection means of the invention；
In figure, 1, knob；2nd, shaft coupling；3rd, guidance axis；4th, screw rod；5th, support base；6th, bearing；7th, bearing cap；8th, it is driven
Mechanism；9th, motor；10th, alignment pin；11st, position sensible element；12nd, control panel；13rd, control panel；14th, binding post；15th, front side
Shell；16th, rear side shell；17th, end enclosure；18th, intake valve；19th, sampler；20th, particle concentration detection means；21st, mark
Quasi- printing opacity template；22nd, screw；23rd, optical detection unit；24th, air pump；25th, self-filtering unit；26th, position sensor.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of online self-correcting air particle detection means provided by the invention, including with existing particulate matter
Concentration detection apparatus 20 connected gear automatic switching control equipment, gas path switching device and control device, control device is according to local
Or remote control commands send control signals to gear automatic switching control equipment and gas path switching device, gear automatic switching control equipment and
Gas path switching device carries out gear switch according to the control signal received and gas circuit switches, and makes particle concentration detection means 20
In different working modes.Wherein, particle concentration detection means 20, gear automatic switching control equipment and control device are arranged at
In crust of the device, be connected by binding post 14 with power line, control line or the signal wire etc. of outside, gas path switching device setting
Outside apparatus housing, it is connected with the liquid passage inlet of particle concentration detection means 20.
Gear automatic switching control equipment includes knob 1, the mechanical device to be linked with knob 1, for providing branch for mechanical device
The support meanss of support, the power set for providing power for mechanical device and the position for being detected to knob position
Detection means.The one end of knob 1 is connected with particle concentration detection means 20, and the other end is connected with mechanical device.Mechanical device bag
The shaft coupling 2 being sequentially connected, guidance axis 3 and screw rod 4 are included, and the other end of shaft coupling 2 is connected with knob 1, is set on guidance axis 3
For the alignment pin 10 for making guidance axis 3 be linked with screw rod 4, the other end of screw rod 4 is arranged in support meanss.Support meanss include branch
Seat 5, bearing 6 and bearing cap 7 are supportted, is provided with the circular hole passed for screw rod 4 on support base 5, the other end of screw rod 4 is worn by support base 5
It is arranged on bearing 6 after going out, and is fixed by bearing cap 7.Power set include the transmission mechanism 8 of motor 9 and two, and motor 9 passes through spiral shell
Nail 22 is fixedly installed on crust of the device and support base 5, is controlled by control device；The output end of motor 9 and the phase of two transmission mechanism 8
Even, transmission mechanism 8 drives screw rod 4 to act.Position detecting device includes position sensible element 11 and position sensor 26, position sense
Answer element 11 to be arranged on shaft coupling 2, passed for sending position signalling according to the position of knob 1 to position sensor 26, position
The position signalling received is sent to control device by sensor 26.
Particle concentration detection means 20 include from gas path switching device be intake valve 18 be connected be used for cut different grains
The sampler 19 of the particle concentration of footpath distribution, the optical detection unit 23 for detecting particle concentration under test gas, use
In inside mistake of the guiding under test gas into the air pump 24 of optical detection unit 23 and for cleaning monitoring device inner air path
Filter unit 25.Optical detection unit 23 is internally provided with standard printing opacity template 21, standard printing opacity template 21 by internal structure with
Knob 1 in gear automatic switching control equipment is connected.
Control device includes setting two control panels 12,13 on the device housing, and control is provided with two control panels 12,13
Module, control module include automatic control module, remote control module, Local Control Module, the module of self-correcting zero, self calibration module
With self diagnosis module.Wherein, automatic control module is used for when particle concentration detection means 20 is started shooting, and particle concentration is examined
Survey device 20 and carry out Initialize installation and upper electric self-correcting, and control particle concentration detection means 20 to enter measuring state；Remotely
The teleinstruction that control module is used to receive host computer transmission is sent to Local Control Module, and uploads local control to host computer
The feedback information of module；Local Control Module is used to receive Local or Remote control instruction, and the Local or Remote that will be received
Control instruction is converted to control signal and is sent to the module of self-correcting zero or self calibration module, at the same receive return school zero, calibration or
State self-diagnosis information；The module of self-correcting zero is used for according to the control signal of self-correcting zero received, to particle concentration detection means
20 measure value zero point correction, and the result of self-correcting zero is sent into Local Control Module；Self calibration module is used for according to reception
To self calibration control signal, value calibration is measured to particle concentration detection means 20, and self calibration result is sent to this
Ground control module；Self-correcting zero-sum self calibration result of the self diagnosis module in Local Control Module, particle concentration is detected
Device 20 carries out state self diagnosis and status information is returned into Local Control Module.
Automatic control module includes initialization control module and start self-correcting module.Control module is initialized to be used in particle
When thing concentration detection apparatus 20 is started shooting, to itself and the progress Initialize installation of particle concentration detection means 20；Start self-correcting mould
Block is used to send control signals to self calibration module successively and the module of self-correcting zero completes upper electric self-correcting, and is received according to self diagnosis module
The status information control particle concentration detection means 20 of collection enters measuring state.
Local Control Module include the module of timing self-correcting zero, timing self calibration module, remote control commands processing module with
And data memory module.The control module of timing self-correcting zero is used to, according to default self-correcting null cycle, periodically send self-correcting zero and control
Signal processed is to the module of self-correcting zero；Timing self calibration control module is used to, according to default self-calibration cycle, periodically send self-correcting
Quasi- control signal is to self calibration module.The host computer that remote control commands processing module is used to receive remote control module transmission is remote
Cheng Zhiling, and host computer teleinstruction is converted into control signal and is sent to the module of self-correcting zero or self calibration module.Data storage
Module is used for school zero, calibration and the condition diagnosing for receiving and storing the module of self-correcting zero, self calibration module or self diagnosis module return
Information.
Crust of the device includes front side shell 15, rear side shell 16 and end enclosure 17.
Based on above-mentioned online self-correcting air particle detection means, the present invention also provides a kind of online self-correcting air particle
The self-correcting of detection means, state self-diagnosing method, comprise the following steps：
1) after particle concentration detection means 20 is started shooting, by automatic control module to itself and particle concentration detection means
After 20 carry out Initialize installation and upper electric self-correcting, control particle concentration detection means 20 enters measuring state.
Specifically, initialization control module is used to complete Initialize installation, start self-correcting module is used to send control successively
Signal completes upper electric self-correcting to self calibration module and the module of self-correcting zero, and according to the control of the status information of self diagnosis module collection
Grain thing concentration detection apparatus 20 enters automatic measurement state.
2) local or host computer send control to Local Control Module or remote control module by control panel 12,13 and referred to
The control instruction received is converted to corresponding control signal and is sent to the module of self-correcting zero or self-correcting quasi-mode by order, Local Control Module
Block.
3) after self calibration module receives self calibration control signal, into corresponding self-calibration mode, send control signals to
Motor 9, after measuring value calibration to particle concentration detection means 20, calibration result is sent to Local Control Module.
Its measured value before dispatching from the factory of particle concentration detection means 20 can pass through calibration experiment, reach technical standard requirement
Error range.After using a period of time or external environment changes, due to optical detection unit internal contamination, electric component
The generation system error such as optical system deviation caused by aging, vibrations, or by use environment, weather, when the extraneous factor such as drift
Influence, its sensitivity changes, and causes measured value to exceed the scope that error allows, should now be calibrated.Due to this
Invention detection means is to measure particle concentration using light scattering method, therefore by the standard printing opacity of known scattered light intensity during calibration
Template 21 (having been subjected to demarcation, coincidence loss requirement) is placed in system light path, produces the scattering light of some strength, the intensity dissipates
Penetrate light and correspond to certain measured value, namely (S values are recorded in the check table of tool housing to calibration value S by demarcating before instrument dispatches from the factory
On).If now the measured value of detection means is in calibration value S error range, it need not calibrate, if measured value is beyond demarcation
Value S error range, then need to make measured value enter in error range by adjustment, so as to realize the purpose of measurement value calibration.
Self calibration module is of the invention by self-correcting into corresponding self-calibration mode according to the self calibration control signal received
Quasi-mode is divided into start self calibration, timing self calibration and real time remote control self-calibration mode.Wherein, start self-calibration mode
Refer to：The self-correcting calibration signal that start self-correcting module in automatic control module is sent, to particle concentration detection means 20
Carry out self calibration, it is main correct before starting up due to environment, weather, when the extraneous factor such as drift caused by measure value drift；It is fixed
When self-calibration mode refer to：The periodicity self-correcting calibration signal sent according to timing self calibration control module in Local Control Module,
Carry out self calibration to particle concentration detection means 20, it is main correct in some cycles due to environment, weather, when drift etc. it is long-term because
Measurement value drift caused by plain；Real time remote control self-calibration mode refers to：The remote calibration sent according to remote control module
Instruction, self calibration is carried out to particle concentration detection means 20, mainly corrected due to the extraneous factor suddenly change such as environment, weather
Caused measurement value drift or fault diagnosis.
The method that self calibration module measures value calibration to particle concentration detection means 20, comprises the following steps：
1. self calibration module sends control signals to motor 9 so that motor 9 rotates forward, and drives screw rod by transmission mechanism 8
4 rotate forward.
2. screw rod 4 drives guidance axis 3 to move by alignment pin 10, and then is rotated by the knob 1 of shaft coupling 2, will revolve
Button 1 is advanced into calibrating position, and now standard printing opacity template 21 is located in light path.
3. position sensible element 11 sends position signalling to position sensor 26, position sensor 26 is by the position of knob 1
Signal is sent to control device.
Wherein, the position signalling that position sensible element 11 is sent can use the signal of the forms such as electricity, light, magnetic.
4. after control device receives the position signalling that position sensor 26 is sent, the stop motion of controlled motor 9, and make
Knob 1 is maintained at calibrating position.
5. optical detection unit 23 starts to measure, after some measurement periods, measured value (dissipating value) is adjusted to mark
Definite value stores the value as autodiagnosis foundation to recover sensitivity of dispatching from the factory.
6. automatic calibration module controlled motor 9 inverts, transmission mechanism 8 is set to drive screw rod 4 to invert, screw rod 4 passes through alignment pin
10 drive guidance axis 3 move, and rotate knob 1 and are advanced into measurement position, self-calibration process terminates.
4) after the module of self-correcting zero receives the control signal of self-correcting zero, into corresponding self-correcting null mode, send control signals to
Intake valve 18 and particle concentration detection means 20, value zero point correction is measured to particle concentration detection means 20, and will
The result of school zero returns to Local Control Module.
To overcome, use environment is different and time drift is to light path, gas circuit, circuit of particle concentration detection means 20 etc.
Influenceed caused by the parameter and measurement result of aspect, it is necessary to carry out school zero to particle concentration detection means 20.Because appoint
The components such as the gas circuit of what measuring instrument or measurement apparatus, light path, circuit work under certain environment and can all show certain make an uproar
Sound value, i.e. basic noise value.To obtain accurate measurement result, must be removed from measured value can just obtain after basic noise value by
Survey the value of physical quantity.And basic noise value can with the use environment of measurement apparatus, weather, when drift etc. extraneous factor cause accordingly
Change, the drift of measured value zero point so as to caused by.Therefore value zero point need be measured according to the situation of change of extraneous factor
Calibration, i.e. school zero.
Equally, the module of self-correcting zero is according to the control signal of self-correcting zero received, and into corresponding self-correcting null mode, the present invention will
Self-correcting null mode is divided into start self-correcting zero, timing self-correcting zero and real time remote control self-correcting null mode.Wherein, start self-correcting zero
Pattern refers to：The control signal of self-correcting zero sent according to self-correcting module of being started shooting in automatic control module, is detected to particle concentration
Device 20 carries out self-correcting zero, be mainly used in correcting before starting up due to environment, weather, when drift etc. measure caused by extraneous factor
Value zero point drift；Timing self-correcting null mode refers to：The self-correcting sent according to the control module of timing self-correcting zero in Local Control Module
Zero control signal, self-correcting zero is carried out to particle concentration detection means 20, is mainly used in correcting in some cycles due to environment, gas
Wait, when drift etc. measured value null offset caused by long term factor；Real time remote control self-correcting null mode refers to：According to remote control
The control signal of self-correcting zero that module is sent, self-correcting zero is carried out to particle concentration detection means 20, be mainly used in amendment due to ring
Border, weather, etc. measured value null offset or fault diagnosis caused by extraneous factor suddenly change.
The method that the module of self-correcting zero measures value zero point correction to particle concentration detection means 20, including following step
Suddenly：
1. the module of self-correcting zero sends control signals to intake valve 18, the inner air path of cut-out particle concentration detection means 20 with
The path of extraneous gas so that particle concentration detection means 20 is internally formed closure gas circuit.
2. the module of self-correcting zero sends control signals to particle concentration detection means 20, booster air pump 24, gas is through inside
The filtering of filter element 25 enters optical detection unit 23 so that the inner air of particle concentration detection means 20 is in closure gas circuit
Continuous circulating filtration, untill the particle concentration for the inner air that optical detection unit 23 measures no longer changes, record this
When measured value.
3. the module of self-correcting zero sends control signals to intake valve 18 so that the inner air path of particle concentration detection means 20 with
Extraneous gas connects, and the process of this self-correcting zero finishes.
4. repeat step 1.~3. several times, obtained each measured value is averagely obtained into average value, as particulate matter
The basic noise value of concentration detection apparatus 20, is preserved, and the process of self-correcting zero finishes.
5) self diagnosis module is according to the self-alignment measurement result of self-correcting zero-sum preserved in Local Control Module, to particulate matter
The state of concentration detection apparatus 20 is judged, and returns to corresponding state information.
Due to use environment, weather, when drift etc. extraneous factor change, it sometimes appear that detection means measured value be 0 or
The measured value situation relatively low compared with normal value, at this moment self diagnosis module is according to self-correcting zero-sum self calibration result, to the shape of detection means
State is judged that determination methods are：
If the measured value returned after calibration is in the range of calibration value allowable error, and the null value behind school zero is less than previous school zero
Value then judges system mode for drift；
If measured value and calibration value relative error magnitudes absolute value are more than 10% after calibration, or even when measured value is close to null value,
Then it is judged as some device failures inside optical detection unit, prompts maintenance；
If above-mentioned two normal, and the cycle of operation reaches sampling dynamical system life cycle, prompts maintenance.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, connected mode and manufacture craft etc. are all
It can be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement, should not exclude
Outside protection scope of the present invention.
Claims (10)
1. a kind of online self-correcting air particle detection means, including particle concentration detection means, it is characterised in that：It includes
Gear automatic switching control equipment, gas path switching device and the control device being connected with the particle concentration detection means；
It is gentle that the control device according to Local or Remote control instruction sends control signals to the gear automatic switching control equipment
Circuit switching device, the gear automatic switching control equipment and gas path switching device carry out gear switch according to the control signal received
Switch with gas circuit, the particle concentration detection means is in different working modes；
The gear automatic switching control equipment is arranged in crust of the device, it include knob, with the mechanical device of the knob linkage,
For for the mechanical device provide support support meanss, the power set for providing power for the mechanical device and
For the position detecting device detected to the knob position；Described knob one end and the particle concentration detection means
In standard printing opacity template be connected, the other end is connected with the mechanical device；The gas path switching device and the particulate matter are dense
Liquid passage inlet in degree detection means is connected.
2. online self-correcting air particle detection means as claimed in claim 1, it is characterised in that：The mechanical device includes
Shaft coupling, guidance axis, screw rod and the alignment pin being sequentially connected, the other end of the shaft coupling is connected with the knob, described to lead
Draw the alignment pin for being provided for making the guidance axis and the screw rod linkage on axle, the screw rod other end is arranged on described
In support meanss.
3. online self-correcting air particle detection means as claimed in claim 1, it is characterised in that：The support meanss include
Support base, bearing and bearing cap, the circular hole passed for the screw rod is provided with the support base, the screw rod other end is by institute
State and be arranged on after support base passes on the bearing, and fixed by the bearing cap.
4. online self-correcting air particle detection means as claimed in claim 1, it is characterised in that：The power set include
Motor and two transmission mechanisms, the motor are fixedly installed on described device shell and support base, are controlled by the control device；
The output end of the motor is connected with two transmission mechanisms, and the transmission mechanism drives the screw action；The position inspection
Surveying device includes position sensible element and position sensor, and the position sensible element is arranged on the shaft coupling, for root
The position signalling that will be received to the position sensor, the position sensor according to the position transmission position signalling of the knob
It is sent to the control device.
5. online self-correcting air particle detection means as claimed in claim 1, it is characterised in that：The control device includes
The control panel being arranged on described device housing, control module is provided with the control panel, and the control module includes automatic
Control module, Local Control Module, remote control module, the module of self-correcting zero, self calibration module and self diagnosis module；
The automatic control module is used for when the particle concentration detection means is started shooting, and the particle concentration is detected and filled
Put and carry out Initialize installation and upper electric self-correcting, and control the particle concentration detection means to enter measuring state；
The teleinstruction that the remote control module is used to receive host computer transmission is sent to Local Control Module, and to host computer
Upload the feedback information of the Local Control Module；
The Local Control Module is used to receive Local or Remote control instruction, is converted into control signal and is sent to self-correcting
Zero module or self calibration module, while receive school zero, calibration or the state self-diagnosis information of return；
The module of self-correcting zero is used to, according to the control signal of self-correcting zero received, carry out the particle concentration detection means
Measured value zero point correction, and the result of self-correcting zero is sent to the Local Control Module；
The self calibration module is used to, according to the self calibration control signal received, carry out the particle concentration detection means
Value calibration is measured, and self calibration result is sent to the Local Control Module；
The self-correcting zero or self calibration result that the self diagnosis module is used in Local Control Module, to the particle concentration
Detection means carries out state self diagnosis and status information is returned into the Local Control Module.
6. online self-correcting air particle detection means as claimed in claim 5, it is characterised in that：The automatic control module
Including initialization control module and start self-correcting module；The initialization control module, which is used to detect in the particle concentration, to be filled
When putting start, Initialize installation is carried out to the particle concentration detection means；The start self-correcting module is used to send successively
Control signal completes upper electric self-correcting to self calibration module and the module of self-correcting zero, and according to the status information control of self diagnosis module collection
Make the particle concentration detection means and enter measuring state；
The Local Control Module include the module of timing self-correcting zero, timing self calibration module, remote control commands processing module with
And data memory module；The control module of timing self-correcting zero is used to, according to default self-correcting null cycle, periodically send self-correcting
Zero control signal is to the module of self-correcting zero；The timing self calibration control module was used for according to default self-calibration cycle, cycle
The transmission self calibration control signal of property is to the self calibration module；The remote control commands processing module is described remote for receiving
The host computer teleinstruction that process control module is sent, and by the host computer teleinstruction be converted to control signal be sent to it is described
The module of self-correcting zero or self calibration module；The data memory module is used to receive and store the module of self-correcting zero, self-correcting quasi-mode
School zero, calibration and the condition diagnosing information that block or self diagnosis module return.
7. a kind of self-correcting of online self-correcting air particle detection means using such as any one of claim 1~6 described device,
State self-diagnosing method, it is characterised in that comprise the following steps：
1) after detection means start, itself and particle concentration detection means are carried out by automatic control module Initialize installation and
After upper electric self-correcting, control particle concentration detection means enters measuring state；
2) local or host computer send control instruction, local control by control panel to Local Control Module or remote control module
The control instruction received is converted to corresponding control signal and is sent to the module of self-correcting zero or self calibration module by module；
3) after self calibration module receives self calibration control signal, into corresponding self-calibration mode, gear is sent control signals to
Automatic switching control equipment and particle concentration detection means, value calibration is measured to particle concentration detection means, and will calibration
As a result it is sent to Local Control Module；
4) after the module of self-correcting zero receives the control signal of self-correcting zero, into corresponding self-correcting null mode, air inlet is sent control signals to
Valve and particle concentration detection means, value zero point correction is measured to particle concentration detection means, and the result of high-ranking officers zero is returned
Return to Local Control Module；
5) self-correcting zero-sum self-alignment measurement result of the self diagnosis module in Local Control Module, particle concentration is detected
The state of device is judged, and returns to corresponding state information.
8. a kind of self-correcting of online self-correcting air particle detection means as claimed in claim 7, state self-diagnosing method, its
It is characterised by：In the step 3), method that self calibration module measures value calibration to particle concentration detection means, including
Following steps：
1. self calibration module, which sends control signals to gear automatic switching control equipment, starts motor so that motor rotates forward, and passes through biography
Motivation structure drives screw rod to rotate forward；
2. screw rod drives guidance axis to move by alignment pin, and then is rotated by shaft coupling knob, knob is advanced into school
Level is put, and now standard printing opacity template is located in light path；
3. position sensible element sends position signalling and the position signalling of knob is sent into control to position sensor, position sensor
Making sheet；
4. after control panel receives the position signalling that position sensor is sent, controlled motor stop motion, and keep knob
In calibrating position；
5. optical detection unit starts to measure, after some measurement periods, measured value is adjusted to calibration value and stored；
6. automatic calibration module controlled motor reversion, makes transmission mechanism drive screw rod reversion, screw rod is driven by alignment pin and guided
Axle moves, and rotates knob and is advanced into measurement position, self-calibration process terminates.
9. a kind of self-correcting of online self-correcting air particle detection means as claimed in claim 7, state self-diagnosing method, its
It is characterised by：In the step 4), method that the module of self-correcting zero measures value zero point correction to detection means, including following step
Suddenly：
1. the module of self-correcting zero sends control signals to intake valve, particle concentration detection means inner air path and extraneous gas are cut off
Path so that particle concentration detection means is internally formed closure gas circuit；
2. the module of self-correcting zero sends control signals to particle concentration detection means, booster air pump, gas is through self-filtering unit
Enter optical detection unit after filtering so that particle concentration detection means inner air is constantly circulated throughout in closure gas circuit
Filter, untill the particle concentration for the inner air that optical detection unit measures no longer changes, records measured value now；
3. the module of self-correcting zero sends control signals to intake valve so that particle concentration detection means inner air path and extraneous gas
Connection, the process of this self-correcting zero finish；
4. repeat step 1.~3. several times, obtained each measured value is averagely obtained into average value, as particle concentration
The basic noise value of detection means, is preserved, and the process of self-correcting zero finishes.
10. a kind of self-correcting of online self-correcting air particle detection means as claimed in claim 7, state self-diagnosing method,
It is characterized in that：In the step 5), the method that self diagnosis module is judged the state of particle concentration detection means is：
If the measured value returned after calibration is in the range of calibration value allowable error, and the null value behind school zero is less than previous school null value then
Judge system mode for drift；
If measured value is more than 10% with calibration value relative error magnitudes absolute value after calibration, it is judged as device inside optical detection unit
Part damages, and prompts maintenance；
If above-mentioned two normal, and the cycle of operation reaches sampling dynamical system life cycle, prompts maintenance.
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